CN104037640B - A kind of secret switch cabinet - Google Patents

Abstract

The invention provides a sealed switchgear, which includes a busbar room, an instrument room, a mechanism room, a cable room, a switch room and a pressure relief passage, and the instrument room, the mechanism room and the cable room form the front cabinet of the sealed switch cabinet. The busbar room, the switch room and the pressure relief passage form the rear cabinet of the sealed switch cabinet. The upper incoming line insulator group, the circuit breaker assembly, the grounding switch and the lower outgoing line insulator group are sequentially arranged in the switch room from top to bottom; the front Each functional room area in the cabinet and the rear cabinet is distributed in a stepped manner; the circuit breaker assembly includes a bracket, a circuit breaker, an operating part and a seal; when the circuit breaker assembly is located in a sealed switch cabinet, the seal The switch room is closed; the support can move the circuit breaker assembly out of the switch room and mechanism room for inspection and maintenance. The sealed switchgear has the advantages of fixed cabinet, center-mounted handcart cabinet and inflatable cabinet. The overall unit and busbar are modularized, and the installation and maintenance are safe and easy.

Description

A sealed switch cabinet

technical field

The invention relates to a power distribution cabinet, in particular to a sealed switch cabinet, more specifically to a sealed high-voltage switch cabinet, and belongs to the technical field of electrical equipment.

Background technique

High-voltage switchgear is an electrical product used to realize on-off, control or protection in power system generation, transmission, distribution, power conversion and consumption. The high-voltage switch manufacturing industry is an important part of the power transmission and transformation equipment manufacturing industry, and occupies a very important position in the entire power industry.

At present, the high-voltage switchgears (circuit breaker switchgears) of 6-40.5KV at home and abroad mainly include fixed switchgears (fixed cabinets), central or removable switchgears (handcart cabinets), inflatable cabinets (gas-filled cabinets) and Solid insulation switchgear, the above-mentioned high-voltage switchgears have their own advantages and disadvantages.

The fixed cabinet is the first generation of high-voltage switchgear products. The cabinet body and internal components are all fixedly connected. The structure is simple, the components are few, the heat dissipation is good, the connection of the conductive bus bar is reliable, the stability is relatively high, the cabinet size is small and the floor space is small. Small; but faults need to be inspected and repaired. Because of the fixed connection method, the entire line needs to be powered off, and disassembly is troublesome, which makes the maintenance time of the fixed cabinet long and thus leads to a long power outage time, which brings great impact on power transmission. the inconvenience.

In order to improve the problems existing in the fixed cabinet, the handcart switch cabinet adjusts the position of the circuit breaker in the cabinet, and integrates the circuit breaker and a car body into a movable handcart circuit breaker, and the circuit breaker can be partially pulled out of the cabinet during maintenance. , easy to replace; but due to the requirement of clear distance between conductors, the size of the handcart cabinet is larger than that of the fixed cabinet and there are more auxiliary insulators. According to the position of the circuit breaker in the cabinet, it can be divided into central cabinet and removable cabinet; the positioning and locking devices of the circuit breaker handcart in these switch cabinets are all set at the bottom of the handcart, limited by its own structure, this type The positioning and locking devices are generally suitable for small current switchgear, and cannot withstand large electromotive torque. Because when the short-circuit current of the switchgear reaches 50kA and above, the generated electromotive force is very large, and the electromotive force is generated at the connection between the moving contact of the handcart and the static contact of the switchgear. Due to the large distance between the electromotive force action point and the bottom of the handcart, a large torque is likely to be generated relative to the bottom handcart positioning device, and the handcart is prone to loosening and shifting, resulting in the disengagement of the dynamic and static contacts. The middle-mounted handcart cabinet is unreliable due to the unreliable sliding connection of the primary plug, resulting in contact heating, and its structure has poor heat dissipation, often causing accidents such as insulation aging and explosion due to overheating. Therefore, the existing handcart positioning and locking methods are difficult to meet the high current and high breaking requirements of the switchgear. In order to improve the stability of the handcart switch cabinet in the closing channel, there are a lot of improvements in the prior art about the handcart fixing methods and devices. For example, Chinese patent application CN 102983524 discloses a switchgear circuit breaker handcart, including a car The head of the car body is provided with a moving contact, and the two sides of the car body are respectively provided with a positioning plate; the positioning plate is provided with a guide wheel that matches the track groove of the handcart positioning device, and a guide wheel that is compatible with the handcart positioning device. An elastic lock rod that matches the test position lock hole and the work position lock hole. The positioning device disclosed in this application and the switchgear circuit breaker handcart obtained by its application can realize the accurate guidance and left and right limit of the handcart, and can meet the stable positioning of the handcart in different positions, which can effectively reduce the loss of electric power. The acting torque can overcome the large electric force; however, it still cannot achieve the same or similar stability as that of the fixed cabinet; in addition, the circuit breaker in the cabinet generally adopts VS1 or VD4 vacuum circuit breaker, and the alignment of the dynamic and static contacts is accurate and consistent with that of the fixed cabinet. If it cannot be monitored, the structure of the contact box is not conducive to the heat dissipation of the contacts, the insulation components are easy to age, and insulation breakdown discharge accidents occur.

Both of the above two switchgears have two disadvantages: they occupy a large space and the primary circuit live main components are not completely enclosed in the switchgear. The development of these two types of switch cabinets is mainly based on these two characteristics. In addition, both fixed cabinets and handcart cabinets are open, that is, the switchgear and connecting parts in the cabinet are directly exposed to the atmosphere, the enclosure protection level is low, the applicability is poor, and it is sensitive to ambient air quality, which is difficult to apply in southern my country. , Coastal areas and underground places where the condensation is polluted and the operating conditions are severe. At the same time, because there are cooling holes or cooling fans, the air circulates in the power distribution cabinet, which is easily affected by dust and humid air, which is more likely to cause equipment oxidation and reduce surface insulation performance, thereby shortening the service life of the equipment.

Due to the problem that the environment has a great impact on the switchgear, a sealed inflatable cabinet, such as C-GIS, was subsequently developed; the entire cabinet of the switchgear is sealed, and the pressure inside the cabinet can be increased by filling the cabinet with SF6 In order to ensure the insulation performance, the size of the cabinet can be reduced by reducing the insulation distance, and the protection level IP is high, which solves the problem of environmental impact on the equipment; but there is still air leakage. If the distance is not enough, the equipment will not be able to operate normally, and the safety hazard is great, and accidents are prone to occur; in addition, because the structural elements are integrated with the cabinet, when the equipment needs to be repaired or replaced, it is impossible to realize the detection of parts or individual components. And maintenance and replacement, so that it can only be used as a one-time power distribution cabinet, the maintenance cost is extremely high; the overall replacement also greatly increases the scope and time of power outages, and reduces the continuity of power supply; in addition, another defect of the inflatable cabinet is that the charging The imported SF6 has been listed as a greenhouse gas, which belongs to the list of emission reductions, which is contrary to China's vigorous promotion of energy conservation and emission reduction.

In recent years, the newly introduced solid insulation switchgear is different from the above-mentioned switchgear in that it adopts a solid insulation method for insulation. The so-called solid insulation is different from the solid-sealed pole in that it not only seals the vacuum interrupter of each item, but also casts the interrupter and its related components with epoxy resin as a whole, so that the switch The safe insulation distance between the internal phases and the ground has been shortened from 125mm for air insulation to the millimeter level, although the size and volume of the switchgear has been greatly reduced; the switchgear is green and environmentally friendly, suitable for distribution network automation, and has strong resistance to environmental pollution; but due to its The solid insulation is formed by the solid insulation method. The solid insulation is susceptible to moisture aging, the insulation performance is reduced, and it cannot be monitored and supervised in real time. On the contrary, it is prone to insulation breakdown discharge accidents; the production process is complex, and the insulation material with high performance and good stability It is a major difficulty for solid insulated switchgear. In addition, this type of switchgear also has the disadvantage of fixed cabinets. It is extremely inconvenient to detect and repair if a fault occurs; domestic companies are still in further research and development, while foreign imports are expensive and costly.

At present, none of the above switchgears can meet the higher and higher requirements of the power system for power supply quality and reliability, nor can it meet the higher and higher requirements of the power system for the economy and reliability of high-voltage switchgear; especially for harsh Switchgear for use in harsh environments.

Contents of the invention

In view of the above-mentioned problems in the prior art, the purpose of the present invention is to provide a comprehensive sealed switchgear that combines the advantages of various cabinets in the prior art and avoids its shortcomings, so as to meet the needs of the power system for high-voltage switchgear. The economy and reliability requirements are getting higher and higher.

In order to realize the purpose of the above invention, the present invention provides a sealed switch cabinet, which has the advantages of simple structure and stable operation of the fixed cabinet, modular design of the overall unit and busbar, and safe and easy installation and maintenance; in addition, it also has the sealing Working environment, high protection level and not affected by the working environment, and the equipment in the cabinet can run stably for a long time; the sealed switchgear is a floor-standing assembly cabinet structure, including busbar room, instrument room (low voltage room), mechanism room, cable room , switch room and pressure relief channel; among them, the instrument room, mechanism room and cable room form the front cabinet A of the sealed switchgear, and in the front cabinet A, from top to bottom, there are instrument room, mechanism room and cable room; busbar room, The switch room and the pressure relief channel form the rear cabinet B of the sealed switch cabinet. In the rear cabinet B, from top to bottom, there are busbar room, switch room and pressure relief channel; in the switch room, from top to bottom, the upper incoming line insulator group , circuit breaker assembly, grounding switch and lower outlet insulator group; wherein, each functional room area in the front cabinet A and rear cabinet B of the sealed switchgear is distributed in steps; the plane opposite to the rear cabinet of the mechanism room is provided with The first opening, the plane opposite to the front cabinet of the switch chamber is provided with a second opening, the bottom end of the second opening is higher than the bottom end of the first opening and the top end of the second opening is not higher than the first opening The top end of an opening, the bottom end of the first opening and the bottom end of the second opening form a step; the switch chamber communicates with the mechanism chamber through the first opening and the second opening; the circuit breaker assembly is built in The switch room and the mechanism room, and run through the first opening and the second opening; the circuit breaker assembly includes a bracket, a circuit breaker, an operating part and a sealing part; wherein the circuit breaker, the sealing part and the operating part pass through the bracket in sequence connection; when there is a passage in the sealed switch cabinet, the circuit breaker is located in the switch chamber, the operating part is located in the mechanism chamber, and the sealing member closes the second opening. At this time, the switch chamber It is sealed.

Preferably, the top surface of the bus chamber is flush with the top surface of the instrument chamber, the bottom surface of the bus chamber (the top surface of the switch chamber) is higher than the bottom surface of the instrument chamber, and the top surface of the switch chamber is lower than the top surface of the instrument chamber but higher than The bottom surface of the instrument room (the top surface of the mechanism room), the bottom surface of the switch room (the top surface of the pressure relief channel) is lower than the bottom surface of the mechanism room (the top surface of the cable room), and the top surface of the switch room (the bottom surface of the busbar room) is higher On the top surface of the mechanism room, the bottom surface of the pressure relief channel (the bottom surface of the rear cabinet B) is flush with the bottom surface of the cable room (the bottom surface of the front cabinet A); here the cabinet body can be divided into top surface, bottom surface, Left, right, front and back, wherein the front of the cabinet is the front view of the cabinet; the opposite cabinet walls of the front cabinet A and the rear cabinet B are fitted and movably connected; wherein the movably connected is preferably screwed.

Preferably, the switchgear cabinet is installed in combination with frame cabinets, partitions and panels, or in combination with cabinets in different functional rooms.

More preferably, each functional room area of the switchgear is formed by splicing panels, and the joints of each panel are fixedly connected. The preferred embodiment can be welded, or folded and then welded.

Preferably, the switch cabinet is made of stainless steel or aluminum alloy, which has good strength and is not easily deformed.

More preferably, the front cabinet is installed in combination with a frame cabinet, a partition and a panel, or is combined and installed by assembling the cabinets of each functional room area through a panel, and the back of the front cabinet is open; the busbar room and the The switch room is installed in a combination of closed or non-closed cabinets. As another preferred method, the rear cabinet can be riveted with the frame cabinet and the partition and panel, and can be filled with glue to ensure the tightness and stability of the cabinet.

More preferably, the second opening is formed by a side wall and/or a front wall of the switching chamber.

More preferably, the second opening is formed by removing material from the front wall of the switching chamber.

More preferably, the second opening is formed by surrounding the top wall and the bottom wall of the switch chamber after the panel is folded from the side wall of the switch chamber.

More preferably, the second opening is formed by folding the panel on the side wall of the switch chamber and surrounding the front wall of the switch chamber by removing material.

Preferably, the area of the first opening is larger than the area of the second opening.

Preferably, the upper incoming line insulator group, the circuit breaker assembly, the grounding switch and the lower outgoing line insulator group constitute two sets of isolating switch fractures; the upper static contact of the isolating switch is connected to one end of the upper incoming line insulator group, and the lower static contact of the isolating switch is connected to one end of the upper incoming line insulator group. Grounding switch connection, the moving contacts of the two isolating switches are independently connected to both ends of the circuit breaker assembly; when the two moving contacts are respectively closed with the upper static contact and the lower static contact, the isolating switch is closed, that is, the switch The isolating switch in the cabinet is in the ON state.

Preferably, the circuit breaker assembly includes a bracket, a circuit breaker, an operating part and a sealing part, wherein the circuit breaker, the sealing part and the operating part are sequentially connected through the bracket.

Preferably, the circuit breaker assembly is sequentially connected to the circuit breaker, the sealing member and the operating member through the bracket from left to right.

Preferably, the circuit breaker is a pole of a three-phase vacuum circuit breaker; and a movable contact is provided at both ends of the pole of the three-phase vacuum circuit breaker.

More preferably, the sealing member includes a sealing plate and a sealing transmission shaft, wherein when the switch cabinet is opened (closed), the sealing plate closes the second opening.

More preferably, the area of the sealing plate is not smaller than that of the second opening and not larger than that of the first opening.

More preferably, the sealing plate has an area larger than that of the second opening and smaller than that of the first opening.

More preferably, the sealed drive shaft includes a flange, an operating drive shaft and a bellows.

More preferably, the operating drive shaft runs through the bellows and the flange in sequence.

More preferably, the flange is screwed to the sealing plate, and the two sides of the sealing plate are the flange and the bellows respectively.

More preferably, the opposite surfaces of the flange and the sealing plate are respectively provided with shape-matching O-ring grooves; preferably, after placing the O-ring in the O-ring groove, the flange and the sealing plate are fixed and sealed by screwing.

More preferably, the operation transmission shaft is divided into a rotating part and a fixed part, and a bearing, preferably an oil-free bearing, is provided between the rotating part and the fixed part.

More preferably, the fixed portion of the operating transmission shaft passes through the bellows, the sealing plate and the flange, and is connected with the operating member to transmit the action of the operating member.

More preferably, the rotating part of the operating transmission shaft is connected to the rotating shaft for transmission through a transmission element, and the transmission element is used to control the opening and closing of the circuit breaker.

More preferably, both ends of the bellows are respectively sealed and connected to the flange and the outer wall of the fixing part.

More preferably, part of the shaft body of the fixing part is a solid body.

More preferably, the bellows is sealingly connected to the outer wall of the solid part of the fixing part, preferably by welding.

It is worth mentioning that the bellows is compressible and its two ends are respectively sealed and connected to the flange and the outer wall of the fixed part. When the drive shaft is operated to drive the circuit breaker to open and close, the drive shaft is operated to move left and right. The seal is welded between the flange and the operating drive shaft to form a seal buffer area to the left of the seal plate.

Preferably, in order to enable the sealing member to securely close the switch chamber, an annular metal fixing member is fixedly connected to the outer periphery of the second opening of the switch chamber, the annular metal fixing member is preferably an annular metal plate, and the fixed connection is preferably welding; for The connection and fixing seal is preferably used to fix the sealing plate; in addition, it is used to prevent deformation of the outer peripheral edge of the second opening and to connect with other components and stabilize the corresponding connection.

More preferably, the fixed connection method between the metal fixing part and the second opening depends on the forming process of the second opening, and the metal fixing part can selectively weld the two side walls, the front wall, the top wall and/or the bottom of the switch chamber wall. As a preferred welding method, the metal fixing member is welded on the side wall of the switch chamber and/or on the edge formed by bending the side wall.

More preferably, when the sealing member closes the switch chamber, the sealing plate and the annular metal plate are screwed and fixed, and the opposite surfaces of the annular metal plate and the sealing plate are provided with matching O-ring grooves for fixing the O-ring Then it is fixed and sealed by screw connection.

More preferably, the screw holes on the annular metal fixing piece do not penetrate through the annular metal fixing piece.

More preferably, at least two positioning pins are provided on the annular metal fixing member, and positioning holes matching the positions of the positioning pins are provided on the sealing plate.

More preferably, the switch cabinet is further provided with a positioning element, which includes a pair of positioning holes on the cabinet wall on the wall side of the switch room and positioning bolts that match the hole diameter and position and are provided on the circuit breaker assembly.

More preferably, the top end of the positioning bolt is a cone.

More preferably, the operating part is provided with a control element that controls the circuit breaker to rotate forward and backward at 90° to realize the opening and closing of the disconnector. The control elements are respectively connected to the operating part and the operation transmission shaft; The movement of the shift fork of the shaft center is realized, and the control element is arranged on the left side of the sealing plate.

More preferably, the control element is fixedly connected to the sealing plate and the bracket through a metal fixing plate and corresponding connecting pieces, and the shift fork is located between the metal fixing plate and the sealing plate; the control rod in the operating part that manipulates the control element passes through the sealing plate Linked with the operator.

More preferably, the control rod for manipulating the control element in the operating part passes through the sealing plate to link with the operating part, and the control rod is provided with an O-ring groove through the sealing plate, and after the O-ring is placed, it is fixed by screwing to ensure seal.

Another object of the present invention is to provide a sealed switchgear, so as to realize the simple structure and good stability of the fixed cabinet. It is located in the busbar room and the switch room; the lower outlet insulator group runs through the side walls of the switch room and the cable room, and is partly located in the switch room and the cable room respectively.

More preferably, the center line of the lower outlet insulator group is parallel to the bottom surface of the cable chamber.

More preferably, the number of upper incoming line insulator groups is the same as that of the lower outgoing line insulator groups, or the number of upper incoming line insulator groups is twice that of the lower outgoing line insulator groups.

More preferably, the three lower outlet insulators are arranged in a triangle, preferably an isosceles triangle or an equilateral triangle.

Preferably, the instrument room, mechanism room and cable room are equipped with doors, and the door of the instrument room is provided with secondary components for control and display, such as function buttons and display screens.

Preferably, a reliable grounding element is also provided in the switch chamber. The reliable grounding element is a grounding static contact arranged on the side wall of the switch chamber and a grounding movable contact matching the position of the grounding static contact. The grounding movable contact is arranged on on the circuit breaker assembly.

Preferably, a small busbar room is provided on the top of the instrument room for arranging small busbars.

Preferably, the pressure relief channel is realized by a pressure relief valve installed on the bottom or top surface of the switch chamber; and the pressure relief channel is preferably a metal bracket made of stainless steel.

Another object of the present invention is to provide a sealed switchgear to realize the convenient maintenance of the handcart cabinet and the detachable circuit breaker for maintenance and replacement. Arranged in parallel from left to right and fixed on the rotating shaft.

Preferably, the mobile frame includes a bracket part and a connecting part.

More preferably, there is a pair of connecting parts, and two ends of the independent connecting bracket parts are arranged in parallel.

More preferably, the support part is a pair of horizontal arms arranged in parallel, and the horizontal arms are respectively located on both sides of the circuit breaker assembly; the connecting part includes an inverted U-shaped curved arm and two parallel vertical arms; the two ends of the curved arms are respectively connected On the same side of the two horizontal arms, the two vertical arms are independently connected to the other side of the two horizontal arms.

More preferably, the two vertical arms are respectively screwed to the two sides of the seal.

More preferably, one end of the rotating shaft is movably connected with the curved arm.

More preferably, a rotating pin is provided at one end of the rotating shaft, and a rotating hole is provided at the flexible connection between the curved arm and the rotating shaft, the position of the rotating pin matches the rotating hole, and the rotating pin can rotate in the rotating hole, thereby realizing a three-phase vacuum circuit breaker The poles are arranged in parallel from left to right and fixed on the rotating shaft, and can rotate forward and backward at 90° along with the rotating shaft.

Another object of the present invention is to provide a sealed switchgear to realize the flexibility of the handcart cabinet and the high protection level of the sealed switchgear. There is a pair of guide rails and it is located in the middle of the front cabinet; the distance between the guide rails in the switch room and the mechanism room is equal, and the distance between the two horizontal arms of the bracket is equal; the circuit breaker assembly also includes a translation device (it can also be a stepped circuit breaker assembly) bracket), and the translation device is used to keep the circuit breaker moving on the same level when encountering steps of different heights.

More preferably, the translation device is arranged on the bracket, wherein: the translation device is arranged on the bracket and includes at least two positioning arms, which are respectively arranged on the horizontal arms of the bracket part; one end of the positioning arm and the horizontal arm pass through the first rail positioning axis Pivotally connected and can rotate around the first guide rail positioning shaft, each positioning arm is provided with a positioning arm locking pin, each positioning arm is equipped with a swing arm, and the swing arm is moved through the second guide rail positioning shaft on the horizontal arm It is pivotally connected with the horizontal arm, and each swing arm is provided with a sliding groove, and the pin of the positioning arm locking pin on each positioning arm is sleeved in the sliding groove of the corresponding swing arm.

As another preferred mode, the translation device is arranged on the bracket and includes at least two positioning arms, which are respectively arranged on the horizontal arms of the bracket part; the positioning arm is composed of two metal arms, and the positioning arm is equipped with a swing arm, and the swing arm Located between the two metal arms, one end of the positioning arm is pivotally connected to the horizontal arm through the first guide rail positioning shaft and can rotate around the first guide rail positioning shaft. The swing arm is connected to the horizontal arm through the second guide rail positioning shaft on the horizontal arm. The arms are pivotally connected, each swing arm is provided with a sliding groove, and the locking pin of the positioning arm penetrates through the sliding grooves of the two metal arms and the swing arm, and the two metal arms are respectively welded or riveted, and the ends of the sliding grooves close to the rollers are respectively set With card slot.

More preferably, the other end of each positioning arm is connected with a roller, and the length (height) of the positioning arm is not less than the step length (height) formed by the second opening and the first opening of the switch cabinet; high.

More preferably, one end of the sliding groove close to the roller is respectively provided with a locking groove.

More preferably, there are four positioning arms and four swing arms, and two positioning arms and two swing arms are provided on each horizontal arm.

More preferably, a spring is provided at the first guide rail positioning shaft and the second guide rail positioning shaft.

It is worth mentioning that the translation device is configured for when the circuit breaker assembly needs to be pulled out of the switch cabinet for detection, the circuit breaker assembly first moves on the guide rail in the switch room through the translation device, and all the positioning arms and swing arms are in the circuit breaker assembly. Under the action of gravity and the fixed support force of the guide rail, they are all stored in the horizontal arm. When the rollers on the positioning arm closest to the sealing plate leave the guide rail of the switch room, the rollers of the positioning arm will lose the fixed support force of the guide rail; That is, under the gravity of the circuit breaker assembly, the positioning arm and the swing arm will be lowered in the vertical direction and leave the horizontal arm, and the positioning arm will change from the horizontal direction to the vertical direction. The rollers of the arm make the circuit breaker assembly still move on the same level, that is, continue to move on the guide rail of the mechanism room. Conversely, when the circuit breaker assembly needs to be pushed into the switch cabinet room, the operator needs to push the circuit breaker assembly to move through the bracket. At this time, the positioning arm is still in the vertical direction. When a group of swing arms in the translation device closest to the steps of the switch chamber and the mechanism chamber will contact the end face of the step corner to generate extrusion force, under the action of extrusion force, The swing arm rotates upwards, and at the same time drives the locking pin of the positioning arm on the positioning arm to slide in the sliding groove, thereby driving the positioning arm to rotate upwards, and finally makes the locking pin of the positioning arm move to the other end of the sliding groove. At this time, the positioning arm of the group and the swing arm are stored in the horizontal arm, and the rollers of the positioning arm will roll on the guide rail of the switch cabinet; at this time, continue to push the circuit breaker assembly forward, and when all the positioning arms and swing arms are stored in the horizontal arm, the horizontal The rollers of the arm can move completely on the guide rails of the switchgear.

Another object of the present invention is to provide a sealed switchgear, in order to realize that the sealed switchgear is small in size, requires less consumables, occupies a small area, and the lower static contact is connected to the grounding switch through an L-shaped metal connector. , wherein the metal connector includes a vertical part and a horizontal part, one side of the vertical part is connected to the insulator of the grounding switch, and the other side is connected to the busbar; the horizontal part is connected to the lower static contact.

Another object of the present invention is to provide a sealed switchgear, so that the sealed switchgear can be installed on the wall and occupy less space; except for the second opening in the switchgear, the walls of the other switchgears are all closed.

Another object of the present invention is to provide a sealed switchgear, in order to realize the visibility of the isolation fracture of the switchgear, monitor whether the alignment of the dynamic and static contacts is accurate, ensure reliable contact or disconnection, and improve the safety of operation and maintenance ; The switchgear is also provided with an isolating switch observation window, which consists of two observation windows A in the instrument room and observation window B in the switch room.

Preferably, the observation window A and the observation window B are concentric and have increasing areas.

More preferably, the viewing window A has a smaller area than the viewing window B.

More preferably, the observation window B passes through plane openings opposite to the switch chamber and the instrument chamber respectively, and a transparent sealing window is provided inside the opening of the switch chamber.

More preferably, the sealing window is made of a transparent material with stable high-pressure resistance, such as transparent glass or plastic.

Another object of the present invention is to provide a sealed switchgear to realize the visibility of the grounding switch of the switchgear and improve the safety of operation and maintenance; the switchgear is also provided with a grounding switch observation window, which is respectively located The observation window C of the cable room and the observation window D of the switch room are composed.

Preferably, the observation window C and the observation window D are concentric and have increasing areas.

More preferably, the viewing window C has a smaller area than the viewing window D.

More preferably, the observation window D passes through plane openings opposite the switch chamber and the instrument chamber respectively, and a transparent sealing window is provided inside the opening of the switch chamber.

More preferably, the sealing window is made of a transparent material with stable high-pressure resistance, such as transparent glass or plastic.

Another object of the present invention is to provide a sealed switchgear to achieve good heat dissipation performance of the sealed switchgear, and the switchgear also includes a heat dissipation channel.

Preferably, the heat dissipation channel is folded and bent by folding and bending the walls of multiple switch chambers. When multiple sealed switch cabinets are put together, the inflection points at the folds between two sealed switch cabinets correspond to each other to form a heat dissipation channel. .

More preferably, the cross section of the heat dissipation channel may be hexagonal or rhombus.

Preferably, a plurality of hollow metal pipes are fixedly connected to the wall of the switch chamber, and the metal pipes run through the top surface and the bottom surface of the switch chamber to form a plurality of heat dissipation channels communicating with the environment.

Another object of the present invention is to provide a sealed switchgear for flexible selection of air insulation or other gas-inflated insulation according to requirements. The switchgear is also provided with an inflatable valve.

Another object of the present invention is to provide an interlock assembly for any of the above-mentioned sealed switch cabinets, so as to realize the automatic "five-proof" interlock function of the high-voltage sealed switch cabinet, which is reliable and stable, with a high safety factor, and the circuit breaker assembly When the sealed switchgear is moved out, the interlocking component seals the second opening.

Preferably, the interlocking assembly includes a linkage, a rolling shutter, a locking piece and a transfer vehicle. After the transfer vehicle locks the sealed switch cabinet through the locking piece, the linkage is activated, and the second opening is closed by the rolling shutter that moves with the linkage. closed.

Preferably, a transfer cart is used to assist in moving the circuit breaker assembly out of or into the sealed switchgear.

More preferably, the expanded area of the roller blind is not smaller than the area of the second opening.

More preferably, the linkage includes a first linkage respectively arranged in the mechanism chamber, a second linkage and a clutch on the transfer vehicle; the movement is transmitted between the first linkage and the second linkage through the clutch; the transfer vehicle Locked and fixed with the sealed switchgear through the locking part, the clutch part will transmit the movement of the first linkage to the second linkage, and then the movement of the circuit breaker assembly will activate the second linkage, and the second linkage will link the first linkage. The roller blind moves downward with the linkage of the first linkage to complete the closing of the second opening.

More preferably, the first linkage includes a first shaft, a first chain group, a first gear, a first transmission shaft, a first transmission gear a, a first transmission chain, and a first transmission gear b, which are sequentially connected and linked; and A transmission gear a is connected to the clutch; the roller blind is installed in the mechanism room through two coil springs at both ends of the first rotating shaft, so the movement of the first rotating shaft will drive the upward or downward movement of the roller blind; the linkage process of the first linkage Yes: when the clutch is linked to the first transmission gear a, the first transmission gear a is transmitted to the first transmission gear b through the first transmission chain, and the first transmission gear b is continuously transmitted to the two sides of the first transmission shaft through the first transmission shaft The first gear drives the first chain through the first gear set, and then drives the first rotating shaft through the first chain, so as to realize the downward or upward movement of the roller blind.

More preferably, there is a pair of first chains, and each first chain forms a right-angled triangle through three first gears, and when the roller blind is fully deployed downwards, it overlaps with a right-angled side of the right-angled triangle.

More preferably, the first transmission shaft is connected to a pair of first gears at the acute angle of the horizontal side of the right triangle.

More preferably, the second linkage includes a second transmission gear, a second transmission shaft, a second chain, a second rotating shaft, a second gear a and a second gear b, which are sequentially connected and driven, wherein both ends of the second rotating shaft are connected with The second gear a and the second gear b are coaxially transmitted by the second rotating shaft.

More preferably, the circuit breaker assembly further includes a rack provided on the auxiliary bracket, and when the rack is meshed with the second gear a for transmission, the second linkage moves together with the circuit breaker assembly.

More preferably, the linkage process of the second linkage is: when the rack moves with the circuit breaker assembly to a certain position on the transfer vehicle, it will mesh with the second gear a, and the rack continues to move with the circuit breaker assembly to drive the second gear a And the second gear b on the same second shaft as the second gear a, the second chain transmits the motion of the second gear b to the second transmission shaft, the second transmission shaft drives the second transmission gear, and the second transmission gear drives the clutch .

More preferably, the movement distance of the interlocking assembly driven by the rack is not less than the deployment distance of the roller blind.

More preferably, the movement distance of the second linkage is not less than the deployment distance of the roller blind.

More preferably, the diameter of the second gear a is smaller than that of the second gear b.

More preferably, the clutch member includes a transmission pin and a clutch element that are coordinated and connected, and the clutch element is connected with the first transmission gear a.

More preferably, when the sealed switchgear cabinet is locked with the transfer vehicle, the transmission pin is inserted into the clutch element to realize the coupling of the clutch elements, thereby realizing the transmission between the first linkage element and the second linkage element, that is, realizing the rolling shutter. Movement down or up.

More preferably, the locking member includes a locking rod, a locking pin and a locking hole; the locking holes are a pair and are respectively arranged on the cabinet frame of the mechanism room; the locking pin is connected with one end of the locking rod, and the locking pin and the locking rod are also one Yes and on the transfer cart, the locking pin is shaped to match the locking hole.

More preferably, the distance between the centerlines of the two locking rods and the distance between the centers of the two locking holes are equal.

More preferably, the other end of the locking lever is further provided with a cam handle, and the cam handle is pivotally connected with the locking lever.

More preferably, the transfer car includes a car body and wheels that support the movement of the car body; both sides of the car body are provided with transfer car guide rails, and the transfer car guide rails and the guide rails in the mechanism room are located in the same horizontal plane, and the two transfer car guide rails The distance between the guide rails of the vehicle is equal to the distance between the two guide rails inside the mechanism room, that is, the guide rails of the two transfer vehicles are at the same height and distance as the guide rails in the mechanism room; the length of the guide rails of the transfer vehicle is not less than the length of the circuit breaker assembly.

More preferably, a baffle is provided at both ends of the guide rail of the transfer vehicle, and a pair of locking rods penetrate each baffle respectively, that is to say, one locking rod penetrates one baffle, and the other locking rod penetrates the other baffle; similarly , matching cam handles and locking levers are located on both sides of each baffle.

More preferably, the locking lever is covered with a spring, and the spring is disposed between the baffle and another baffle fixed on the locking lever.

More preferably, the circuit breaker assembly and the transfer workshop are further provided with a pair of matching fixing holes and fixing pins for further stabilizing the circuit breaker assembly.

More preferably, the fixing hole is arranged on the transfer vehicle, and the fixing pin is arranged on the operating part of the circuit breaker assembly.

Preferably, the sealed switchgear further includes an auxiliary locking element for stopping the movement of the interlocking assembly.

More preferably, the locking auxiliary element is arranged on the inner wall of the cable chamber at the same height as the locking hole of the locking piece, and includes an auxiliary locking pin and an auxiliary locking pin control rod, one end of the auxiliary locking pin control rod is movably connected to the inner wall of the cable chamber, and The locking auxiliary component is always close to the inner wall of the cable chamber through a spring arranged at the movable connection; the other end of the auxiliary locking pin control rod is fixedly connected with the auxiliary locking pin.

More preferably, the auxiliary locking pin is inserted into the first chain of the first linkage to stop the movement of the first chain to stop the movement of the linkage.

More preferably, when the locking pin of the locking piece is inserted into the locking hole, the locking pin pushes up the control rod of the auxiliary locking pin at the same time, and at this time, the auxiliary locking pin leaves the first chain, and then the interlocking assembly can be linked with the movement of the circuit breaker assembly. Lock safety protection; and when the roller shutter is completely lowered and the circuit breaker assembly has left the sealed switchgear cabinet, by pulling out the locking pin, the auxiliary locking pin control lever will drive the auxiliary locking pin to stop the movement of the first chain again.

Compared with the prior art, the sealed switchgear provided by the present invention not only has high strength, beautiful appearance, compact structure and energy saving, small footprint, good interchangeability, strong oxidation resistance, good heat dissipation, high current transmission, and high voltage , good sealing, easy to disassemble and easy to operate, it also has the following advantages:

1. The miniaturization of the cabinet structure, the size of the entire sealed switch room is only 1000 long * 650 wide * 1300 high, reliable wall installation and operation occupy less land, saving a certain area to improve land utilization;

2. The assembled cabinet structure provides manufacturers with convenient conditions for prefabrication, storage, and transportation, as well as flexible adaptability in manufacturing, and also provides users with products with high precision;

3. Both the isolation fracture and the grounding switch are visible, and the accuracy of the alignment of the dynamic and static contacts can be monitored to ensure reliable contact or disconnection and improve the safety of operation and maintenance;

4. High protection level, wide use environment, reduce failure rate, pollution, oxidation, etc. Inspection, the protection of the sealed switchgear is the highest protection level up to IP67;

5. The removable and detachable circuit breaker components are small in size and light in weight, with full five-proof interlocking functions, high safety factor, and convenient maintenance and repair;

6. The wiring in the cabinet is easy to install, and the cables are arranged reasonably, especially the cables coming out from the bottom come out from the front cabinet, which is convenient for inspection and maintenance;

7. The middle-mounted guide rail is adopted, which relatively reduces the phenomenon of poor contact of dynamic and static contacts and excessive temperature rise caused by the deviation of the installation foundation of the sealed switchgear;

8. The circuit breaker body and the cabinet are equipped with a dynamic and static contact that is reliably grounded, which can ensure reliable grounding of the circuit breaker components no matter in the working position or the isolation position;

9. The components in the cabinet are simplified, and the structure of the dynamic and static contact box is cancelled, which is beneficial to the heat dissipation of the contacts; it is suitable for transmitting large current and adopts a fast grounding switch, which meets the requirements of GB3906-2006.

In summary, the sealed switchgear provided by the present invention, especially as a high-voltage sealed switchgear, can meet the high economic and reliability requirements of the high-voltage switchgear in the power system, and greatly improve the continuity of power supply operation.

Description of drawings

Fig. 1 is the sectional view of the sealed switchgear provided by the present invention;

Fig. 2 is a sectional view of the circuit breaker assembly in the sealed switchgear provided by the present invention;

Figure 3 is a partially enlarged view (A-A) when the sealing plate and the annular metal plate in the sealed switchgear provided by the present invention are connected;

4 is a perspective view of a sealed transmission shaft in a sealed switch cabinet provided by the present invention;

Fig. 5 is the front view when the circuit breaker assembly in the sealed switch cabinet provided by the present invention seals the switch room;

Fig. 6 is a front perspective view of the sealed switchgear provided by the present invention;

Fig. 7 is a front view of the sealed switchgear provided by the present invention;

Fig. 8 is a structural schematic diagram of a grounding switch in a sealed switchgear provided by the present invention;

Fig. 9 is a schematic diagram of the working principle and structure of the translation device in the sealed switchgear provided by the present invention;

Figure 10 is a schematic diagram of the working principle and structure of the translation device in the sealed switchgear provided by the present invention;

Figure 11 is a partially enlarged view of the translation device (B-B) in the sealed switchgear provided by the present invention;

Fig. 12 is a schematic diagram of a preferred embodiment of the heat dissipation channel of the sealed switchgear provided by the present invention;

Fig. 13 is a schematic diagram of a preferred embodiment of the heat dissipation channel of the sealed switchgear provided by the present invention;

Figure 14 is a partially enlarged view of the linkage (C-C) of the "five-proof" interlocking assembly of the sealed switchgear provided by the present invention;

Figure 15 is a partial enlarged view of the second linkage and clutch (D-D) of the "five-proof" interlocking assembly of the sealed switchgear provided by the present invention;

Fig. 16 is a partially enlarged view of the locking part (E-E) of the "five-proof" interlocking assembly of the sealed switchgear provided by the present invention;

Fig. 17 is a flow chart of the working steps of the "five-proof" interlocking components of the sealed switchgear provided by the present invention;

Fig. 18 is a schematic structural diagram of the locking auxiliary element in the "five-proof" interlocking assembly of the sealed switchgear provided by the present invention.

detailed description

The present invention will be further described in detail and completely below in conjunction with specific implementation methods and accompanying drawings.

The invention provides a sealed switch cabinet, which is an indoor sealed switch cabinet. Figure 1 is a cross-sectional view of the sealed switch cabinet. As shown in Figure 1, the sealed switch cabinet is a floor-standing assembled cabinet structure, which includes Bus room 0, instrument room 1 (low voltage room), mechanism room 2, cable room 3, switch room 4 and pressure relief channel 5, specifically, instrument room 1, mechanism room 2 and cable room 3 form the front of the sealed switchgear Cabinet A, busbar room 0, switch room 4 and pressure relief channel 5 form the rear cabinet B of the sealed switch cabinet; the bottoms of the front cabinet A and the rear cabinet B are flush and placed on the ground or other planes, and the front cabinet A and the The opposite cabinet wall of the rear cabinet B is attached and flexibly connected to the use state or factory state of the switch cabinet; in order to clearly and briefly describe the further structure of the switch cabinet, the opposite surface of the front cabinet A and the rear cabinet B is called The back of the front cabinet A (the cabinet wall on this side is referred to as the rear wall for short), and the opposite surface where the rear cabinet B and the front cabinet A are attached is called the front of the rear cabinet B (the cabinet wall on this side is called the front wall for short). The movable connection is preferably a screw connection, which is fixed by cooperating with bolts and screw holes. In the front cabinet A, there are instrument room 1, mechanism room 2 and cable room 3 from top to bottom, and in the rear cabinet B, there are bus room 0, switch room 4 and pressure relief channel 5 from top to bottom. The sealed switchgear cabinet can be installed in combination with the cabinet frame, partitions and panels, or in combination with customized cabinets in different functional rooms. Each functional room area of the switchgear is spliced by panels; it is preferably welded by panels. It can be made of stainless steel or aluminum alloy, which has good strength and is not easy to deform. As a preferred embodiment, the front cabinet A is installed by combining the frame cabinet body with the partition board and the panel, or combining and installing the cabinet bodies of each functional room area through the panel, and the back of the front cabinet A is in an open state; The busbar room 0 and the switch room 4 in the rear cabinet B are installed in combination of closed or non-closed cabinets. Inside the switch room 4 from top to bottom are the upper incoming line insulator group 6 , the circuit breaker assembly 7 , the grounding switch 8 and the lower outgoing line insulator group 9 . The upper static contact 10 (or moving contact) of the isolating switch is independently connected to one end of the upper incoming line insulator group 6, and the lower static contact 11 (or moving contact) is independently connected to the grounding switch group 8, and the isolating switch The moving contacts 12 (or static contacts) of the isolating switch are independently connected to both ends of the circuit breaker assembly 7; the specific distribution of the moving and static contacts of the isolating switch is not fixed here, and can be selected according to actual needs. The branch busbars are respectively connected to the lower outlet insulator and the grounding switch (the connection here is omitted in the figure). When the moving contacts at both ends of a pole are respectively closed with the upper static contact and the lower static contact, the isolating switch is closed, that is, the isolating switch in the sealed switch cabinet is in a state of passage (when the circuit breaker is closed, that is, the circuit breaker in the cabinet The circuit is in the open state). Furthermore, a small busbar room 13 may also be provided on the top of the instrument room 1 for arranging small busbars. Different from the products in the prior art, the functional room areas in the front cabinet A and the rear cabinet B of the sealed switchgear are distributed in steps. In other words, as shown in Figure 1, the top surface of the busbar room 0 and the instrument room The top surface of 1 is flush, the bottom surface of bus room 0 (the top surface of switch room 4) is higher than the bottom surface of instrument room 1, the top surface of switch room 4 is lower than the top surface of instrument room 1 but higher than the bottom surface of instrument room 1 (the top surface of the mechanism room 2), the bottom surface of the switch chamber 4 (the top surface of the pressure relief channel 5) is lower than the bottom surface of the mechanism room 2 (the top surface of the cable room 3), the bottom surface of the pressure relief channel 5 (the top surface of the rear cabinet B) Bottom surface) is flush with the bottom surface of the cable compartment 3 (the bottom surface of the front cabinet A). In order to reduce the cost and simplify the structure, the pressure relief channel 5 is made of stainless steel and a metal bracket is matched with the pressure relief valve installed on the bottom or top surface of the switch chamber 4 . It is worth mentioning that the sealing performance of the sealed switchgear is realized by the sealing member in the circuit breaker assembly 7 which can seal the switch room 4 . An opening 14 is provided between the switch chamber 4 and the mechanism chamber 2, that is, a first opening is provided on the plane opposite to the rear cabinet B between the mechanism chamber 2 and a first opening is not marked in the figure), and a second opening is provided on the plane opposite to the front cabinet A between the switch chamber 4 and the front cabinet A. Opening (not marked in the figure), the bottom end of the second opening is higher than the bottom end of the first opening and the top end of the second opening is not lower than the top end of the first opening, that is, the area of the first opening is greater than the area of the second opening ; In other words, the bottom end of the first opening and the bottom end of the second opening form a step 15, that is, the switch chamber 4 communicates with the mechanism chamber 2 through the first opening and the second opening. The circuit breaker assembly 7 is built in the switch chamber 4 and the mechanism chamber 2, and passes through the first opening and the second opening. As a preferred embodiment, in order to achieve fewer production processes, that is, to reduce welding processes, the switchgear can be spliced with panels, or folded panels (folded panels form at most 4 sides) and then spliced with panels to form. Taking the above-mentioned switchgear as an example, a manufacturing process for forming a preferred embodiment of the second opening will be described. The second opening is formed by the side walls and/or the front wall of the switching chamber 4 . One way of forming the second opening is that the opposite side walls of the switch chamber 4 are folded with the top wall and the bottom wall of the switch chamber 4 to form a second opening, that is, the left side wall of the switch chamber 4 is folded to the right to form the switch. The right side wall of the chamber 4 is folded to the left while being surrounded by the top and bottom walls of the switch chamber 4, thus forming the second opening. Another way of forming the second opening is that the front wall of the switch chamber 4 is formed by removing material, and the area of the removed material is equal to the size of the second opening. The second opening may also be formed by combining the above two methods. In order to prevent the outer periphery of the second opening from being deformed and to be connected with other components and stabilize the connection, a metal fixing part is welded on the outer periphery of the second opening, and the metal fixing part is a metal ring plate. The welding method of the metal fixing member and the second opening depends on the forming process of the second opening. The metal fixing member can selectively weld the two side walls, the front wall and/or the top wall and the bottom wall of the switch chamber 4 . As a preferred welding method, the metal fixing member is welded on the side wall of the switch chamber 4 and/or on the edge formed by bending the side wall.

The bracket 701 includes a moving frame 7011 and a rotating shaft 7012. The moving frame 7011 includes a bracket part 70111 and a connecting part 70112. The connecting parts 70112 are a pair, arranged in parallel and independently connecting two ends of the bracket part 70111. The bracket part 701111 is a pair of horizontal arms 701111 arranged in parallel, and the horizontal arms 701111 are respectively located on both sides of the circuit breaker assembly 7 . The connecting part 70112 includes an inverted U-shaped curved arm 701121 and two parallel vertical arms 701122; the two ends of the curved arm 701121 are respectively connected to the same side of the two horizontal arms 701111, and the two vertical arms 701122 are independently connected to the two horizontal arms The other side of 701111; two vertical arms 701122 are respectively screwed on both sides of the seal 704. One end of the rotating shaft 7012 is movably connected with the curved arm 701121; a preferred embodiment for realizing the articulated connection is realized through a matching rotating pin and a rotating hole (not shown in the figure), and one end of the rotating shaft 7012 is provided with a rotating pin, and the curved arm 701121 There is a rotating hole at the movable connection with the rotating shaft 7012, the position of the rotating pin matches the rotating hole, and the rotating pin can rotate in the rotating hole, so that the poles of the three-phase vacuum circuit breaker are arranged in parallel and fixed on the rotating shaft 7012 from left to right And it can be rotated forward and backward by 90° along with the rotating shaft 7012.

The sealing member 704 includes a sealing plate 7041 and a sealing drive shaft 7042, wherein when the sealed switchgear forms a passage (closing), the circuit breaker 702 is located in the switch chamber 4, the operating member 703 is located in the mechanism chamber 2, and the sealing member 704 ( The sealing plate (7041) closes the second opening, and the switch chamber 4 is in a sealed state at this time. As one of the preferred manners, the area of the sealing plate 7041 is larger than the area of the second opening and smaller than the area of the first opening. In order to make the sealing member 704 can firmly seal the switch chamber 4, the outer periphery of the second opening of the switch chamber is welded with a metal fixing plate, and the metal fixing plate is the annular metal fixing member 401; FIG. 3 is A-A when the sealing plate and the annular metal plate are connected. Partial enlarged view, as shown in Figure 3, when the sealing member 704 seals the switch chamber 4, the sealing plate 7041 and the annular metal plate 401 are screwed and fixed, and the opposite surfaces of the annular metal plate 401 and the sealing plate 7041 are provided with shape matching The O-type gasket groove 16 is used for fixing the O-type gasket and then fixing and sealing by screwing.

It is worth mentioning that, in order to further ensure the sealing effect, the inventor further improved the structure of the seal 704, especially the seal transmission shaft 7042. Figure 4 is a perspective view of the seal transmission shaft 7042, as shown in Figure 4, the seal transmission shaft 7042 includes flange 70421 , operating drive shaft 70422 and bellows 70423 . The flange 70421 is screwed to the sealing plate 7041, and preferably on the opposite surface of the flange 70421 and the sealing plate 7041, a shape-matching O-ring groove is arranged in turn, and then the O-ring is placed and then fixed and sealed by screwing (here the gasket groove Same as the prior art, not shown in the figure). The operation drive shaft 70422 is divided into a rotating part 704221 and a fixed part 704222, wherein in order to ensure the rotation and transmission of the operation drive shaft 70422, a bearing 704223 is provided between the rotating part 704221 and the fixed part 704222, preferably an oil-free bearing. One end of the operation transmission shaft 70422 (fixed part 704222) passes through the bellows 70423, the sealing plate 7041 and the flange 70421 to connect with the operation member 703 to transmit the action of the operation member 703; the other end of the operation transmission shaft 70422 is connected to the rotating shaft through the transmission element 7031 7012 is connected to the transmission, and the transmission element 7031 (preferably a crank arm, such as a seven-character crank arm) enables the opening and closing of the circuit breaker 702 through transmission, that is, the arc extinguishing chamber (vacuum bubble or vacuum tube) of the pole of the three-phase vacuum circuit breaker opening and closing. Part of the shaft body in the fixing part 704222 is a solid body, and the bellows 70423 is a non-rigid bellows 70423, that is, a compressible bellows 70423 and its two ends are respectively sealed (welded) to the flange 70421 and the outer wall of the fixing part 704222, among which It is welded to the outer wall of the solid part of the fixed part 704222. Therefore, when the drive shaft 70422 is operated to drive the breaker to open and close, the drive shaft 70422 is operated to move left and right (the operation of the drive shaft 70422 to move left and right in the operating part is a prior art, and will not be described in detail here), and the bellows 70423 is Its seal is welded between the flange 70421 and the operating transmission shaft 70422 to form a sealing buffer area on the left side of the sealing plate 7041, and the left side of the sealing buffer area (in the switch chamber 4) can still maintain a sealed state, especially It is to ensure that the seal can be maintained under the action of great air pressure, and the compressibility of the bellows 70423 does not affect the left and right movement of the operating drive shaft 70422 to realize the opening and closing of the circuit breaker; in other words, through the flange 70421 and the bellows 70423 When the sealing member 704 is used in conjunction with the switch chamber, the opening and closing of the circuit breaker 702 and the opening and closing of the isolating switch will not be affected.

Figure 5 is a front view of the sealed switchgear when the seal 704 seals the switch chamber 4 (in order to better express the sealing state, the operating part 703 on the right side of the seal 704 and the door 21 of the mechanism room 2 are omitted in the figure ), as shown in Figure 5, in order to better make the sealing member 704 cooperate with the switch chamber 4 to be airtight, at least two positioning pins 17 are provided on the extension of the second opening of the switch chamber 4, and the sealing plate 7041 is provided with matching positioning holes 18. The locating pins are preferably arranged on the annular metal plate; a set of locating elements 19 are also added, specifically a pair of locating holes 1901 on the cabinet wall on the wall side of the switch room, and the apertures, shapes and positions are uniform. The positioning pin 20 is matched and arranged on the circuit breaker assembly 7 .

For a more reasonable allocation structure, the inventor further improved the structure of the circuit breaker assembly 7, the control element 7032 in the operating part 703 controls the circuit breaker 702 to rotate forward and reverse at 90° to realize the opening and closing of the disconnector, and the control element 7032 is respectively connected to The movement of the operating member 703 and the operating transmission shaft 70422 can be realized by the movement of the shift fork 70311 coaxial with the rotating shaft 7012 . The movement of the shift fork 70311 can be realized in a common way in the prior art, such as through the transmission of a locator moving back and forth on the screw mandrel to realize the rotation of the shift fork 70311, which will not be described in detail here. However, the control element 7032 is different from the prior art in that the control element 7032 is arranged on the left side of the sealing plate 7041 instead of being arranged in the operating part 703. As shown in FIG. 2, the control element 7032 passes through a metal fixing plate 70312 and The corresponding connecting piece is fixedly connected with the sealing plate 7041 and the bracket 701, and the shift fork 70311 is located between the metal fixing plate 70312 and the sealing plate 7041; however, the control rod 7033 for manipulating the control element 7032 in the operating member 703 passes through the sealing plate 7041 Linked with the operating part 703, in order to ensure the sealing effect of the sealing part 704, similarly, the control rod 7303 should be provided with an O-shaped gasket at the place where the control rod 7303 penetrates through the sealing plate 7041 and then fixed by bolts to ensure the sealing, or a small flange and corresponding O-ring grooves are implemented. In addition, the principle of connecting the control element 7032 to the operating transmission shaft 70422 and the operating member 703 without affecting the opening and closing of the disconnector is the same as the prior art, and will not be repeated here.

In order to make the sealed switchgear compact and reduce the size, Figure 6 is a front perspective view of the sealed switchgear, as shown in Figures 1 and 6, when the upper static contact 10, a pair of moving contacts 12 and the lower static contact When the center line of the contact 11 forms a straight line perpendicular to the ground, the isolating switch in the sealed switchgear is in the closed state; the upper incoming line insulator group 6 runs through the top surface or side wall of the switch room 4, and is placed in the bus room 0 The lower outlet insulator group 9 runs through the side walls of the switch chamber 4 and the cable chamber 3, that is, the lower outlet insulator group 9 is partly located in the switch chamber 4, and the other part is located in the cable chamber 3, and the center line of the lower outlet insulator group 9 is preferably Parallel to the sealed switchgear (the bottom surface of the cable chamber 3); the number of incoming line insulator groups 6 and the number of lower outgoing line insulator groups 9 can be set according to actual needs. As a preferred embodiment, the number of upper incoming line insulator sets 6 can be the same as the number of lower outgoing line insulator sets 9, or the number of upper incoming line insulator sets 6 can be twice that of the lower outgoing line insulator sets 9; for example, switch room 4 There can be six upper incoming line insulator groups 6, and three lower outgoing line insulator groups 9, so the busbar can be installed with one connection and one connection or one connection and two installations to meet the needs of transmitting different bus currents. In order to ensure that the clear space between the busbars meets the regulations (not less than 125mm in the air medium), the three lower outlet insulator groups 9 are arranged in a triangle, preferably an isosceles triangle or an equilateral triangle. Fig. 7 is the front view of the sealed switchgear, as shown in Fig. 7, wherein the instrument room 1, the mechanism room 2 and the cable room 3 are equipped with a door 21, and the door 21 of the instrument room 1 is provided with a control and Secondary components for display, such as function buttons 101 and display screen 102 .

It is worth mentioning that, in order to observe the working state of the isolating switch in real time, especially the isolating fracture between the moving contact 12 and the static contact (10, 11), the sealed switch cabinet is also provided with an isolating switch observation window 22 , as shown in Figures 6 and 6, the isolation switch observation window 22 is composed of two observation windows A2201 respectively located in the instrument room 1 and an observation window B 2202 in the switch room 4, and the observation window A 2201 and the observation window B 2202 are preferably concentric And the area increases, or the area of the observation window A 2201 is smaller than the observation window B 2202; in addition, in order to maintain the sealed state of the sealed switchgear, the observation window B 2202 passes through the plane openings 2203 in the switch room 4 and the instrument room 1 respectively, and A transparent sealing window 23 is provided inside the opening of the switch chamber 4, and the sealing window 23 is made of a transparent material with stable high-pressure resistance, such as transparent glass or plastic. Similarly, in order to realize the real-time monitoring of the earthing switch, the sealed switchgear is also provided with an earthing switch observation window 24. The structure of the earthing switch observation window 24 can refer to the isolation switch observation window 22, but it is different from the isolation switch observation window 22. The grounding switch observation window 24 is respectively provided in the cable room 3 and the switch room 4, and other structures and positional relationships can be adjusted according to the specific position of the grounding switch 8 with reference to the structural position of the isolation switch observation window 22.

In order to further ensure the safety of the sealed switchgear, the inventor further improved the structure of the switch chamber 4 and added a reliable grounding element 25, which is specifically arranged on the side walls of the switch chamber 4 with grounding static contacts. 2501 and the grounding movable contact 2502 matching the position of the grounding static contact, the grounding movable contact 2502 can be set on the circuit breaker assembly 7; wherein the grounding movable and static contacts can be interchanged, and the static contact is installed on the circuit breaker It will be easier to overhaul and replace on assembly 7.

In addition, in order to further reduce the volume of the sealed switchgear, the inventor simplified the grounding switch 8. Figure 8 is a schematic structural diagram of the grounding switch 8. As shown in Figure 8, the grounding switch 8 can be used on the premise of retaining the original function The lower static contact 11 can be connected to the grounding switch 8 through an L-shaped metal connector 801, so that a group of post insulators and wires are reduced in the connection between the grounding switch 8 and the lower static contact 11, thereby reducing the The size and volume of the switch chamber 4 are specified. One side of the vertical part 8011 of the metal connector 801 is connected to the insulator of the grounding switch 8 , and the other side is connected to the bus bar; the horizontal part 8012 is connected to the lower static contact 11 .

It is worth mentioning that the circuit breaker assembly in the sealed switchgear of the present invention can also realize the mobile function of the handcart, by adding rollers 27 to the horizontal arm 701111 of the bracket part 70111 in the bracket 701 and setting them in the switch room 4 and The guide rails (402, 201) on the two side walls of the mechanism room 2 are realized; as a preferred embodiment, the guide rails 402 of the switch room 4 are located in the middle of the entire sealed switch cabinet, like the central cabinet. However, due to the stepped cabinet arrangement and the sealing function of the circuit breaker assembly 7, there is a step 15 between the switch room 4 and the mechanism room 2, so the circuit breaker assembly 7 overcomes the stepped movement when it is moved out of the sealed switch cabinet. Therefore, in order to cooperate with the smooth push and pull of the circuit breaker assembly 7 on the guide rails of different steps, the inventor researched and developed a translation device 26 for the circuit breaker assembly 7, which can realize the circuit breaker assembly 7, especially The circuit breaker 702 can still move at the same level when encountering step surfaces of different heights. In order not to complicate the structure of the sealed switchgear, the inventor integrated the structure of the bracket 701 of the circuit breaker assembly and the translation device 26 . Translating device 26 is located on support 701, wherein: the distance between a pair of horizontal arms 701111 of support 701 and the distance between guide rails 402 on the two side walls of switch chamber 4 (the guide rails 201 on the two side walls of mechanism chamber 2) are all equal in width, that is, horizontal The rollers 27 provided on the arm 701111 can move along the guide rails (402, 201) respectively. 9 and 10 are schematic diagrams of the working principle and structure of the translation device 26 . Translation device 26 includes at least two positioning arms 2061, which are respectively arranged on horizontal arms 701111 (as a preferred embodiment, there are four positioning arms 2601, and two positioning arms 2601 are set on each horizontal arm 701111), positioning One end of the arm 2601 is pivotally connected with the horizontal arm 701111 by a first guide rail positioning shaft 2602 and can rotate around the first guide rail positioning shaft 2602. Each positioning arm 2601 is provided with a positioning arm locking pin 2603. Each positioning arm 2601 is equipped with a swing arm 2604, and the swing arm 2604 is pivotally connected with the horizontal arm 701111 through a second guide rail positioning shaft 2605 on the horizontal arm 701111, and each swing arm 2604 is provided with a sliding groove 2606, and each positioning arm 2601 The positioning arm locking pin 2603 on the top is sleeved in the sliding groove 2606 of the corresponding swing arm 2604, and one end of each positioning arm 2601 is connected with a roller 27, and the length (height) of the positioning arm 2601 is compatible with the second opening and the first opening. The formed steps have the same length (height), that is, the same height as the step 15 . When the circuit breaker assembly 7 needs to be pulled out of the sealed switchgear for detection, the circuit breaker assembly 7 first moves on the guide rail 402 in the switch room 4 through the translation device 26, and all the positioning arms 260 and the swing arms 2604 are positioned at the center of the circuit breaker assembly 7. All be received in the horizontal arm 701111 under the effect of gravity and the fixed support force of guide rail. And when the rollers 27 on a group of positioning arms 2601 closest to the sealing plate 7041 leave the guide rail 402 of the switch chamber 4, the rollers 27 of the positioning arm 2601 will lose the fixed support force of the guide rail 402; Next, the positioning arm 2601 and the swing arm 2604 will be put down in the vertical direction and leave the horizontal arm 701111, and the positioning arm 2601 will change from the horizontal direction to the vertical direction, and the length of the positioning arm 2601 will make up for the height difference of the above-mentioned stepped guide rail through the positioning arm 2601. The rollers 27 make the circuit breaker assembly 7 still move on the same horizontal plane, that is, continue to move on the guide rail 201 of the mechanism room 2 . Conversely, when the circuit breaker assembly 7 needs to be pushed into the sealed switchgear room, the operator needs to push the circuit breaker assembly 7 to move through the bracket 701. At this time, the positioning arm 260 is still in a vertical direction. When the translation device 26 is closest to A group of swing arms 2604 at the step 15 of the switch chamber 4 and the mechanism chamber 2 will contact with the right-angled end faces of the steps to generate extrusion force. The positioning arm locking pin 2603 of the positioning arm slides in the sliding groove 2606, thereby driving the positioning arm 2601 to rotate upwards, and finally the positioning arm locking pin 2603 moves to the other end of the sliding groove 2606. At this time, the positioning arm 2601 and the swing arm 2604 of the group are all stored in the horizontal arm 701111, the roller 27 of the positioning arm 2601 will roll on the guide rail 402 of the sealed switch cabinet 4; at this time, continue to push the circuit breaker assembly 7 forward, then when all the positioning arms 2601 and swing arms 2604 are closed When in the horizontal arm 701111, the roller 27 in the horizontal arm 701111 can completely move on the guide rail 402 of the sealed switch cabinet.

As a better embodiment, Fig. 11 is a B-B partial enlarged view of the translation device 26 in a sealed switch cabinet provided by the present invention. As shown in Fig. 11, in order to simplify the structure of the circuit breaker translation device 26, the positioning arm 2601 is composed of two metal arms, the swing arm 2604 is located between the two metal arms, and the positioning arm locking pin 2603 penetrates the sliding groove 2606 of the two metal arms and the swing arm 2604 and welds or rivets the two metal arms respectively; The support of a good fixed translation device and the moving direction are fixed, that is, the positioning arm 2601 can only move 90 degrees downward from the horizontal arm 701111 to return to the horizontal arm 701111 in a vertical or opposite direction, and the sliding groove 2606 is close to the positioning axis of the first guide rail One end of 2602 is respectively provided with locking slots 2607, and the first and second guide rail positioning shafts (2602, 2603) are provided with a spring (not shown in the figure) to realize that the translation device 26 loses the guide rail 401 in the switch chamber 4 The supporting force enables the positioning arm 2601 and the swing arm 2604 to pop up automatically; and in order to maintain the positioning arm 2601 perpendicular to the guide rail 201 in the mechanism room 2, the positioning arm locking pin 2603 is located at the locking groove 2607 of the sliding groove 2606; otherwise, When the positioning arm 2601 and the swing arm 2604 are located in the horizontal arm 701111 , the positioning arm locking pin 2603 is located at the other end of the sliding slot 2606 .

In addition, in order to further ensure the movement balance of the translation device 26, the translation device 26 also includes a pair of auxiliary brackets 28 fixedly connected to both sides of the operating member 703, and each auxiliary bracket 28 is provided with a roller 27, wherein the auxiliary bracket 28 rollers The axis of the positioning arm 27 and the axis of the positioning arm 2601 roller 27 are at the same level, so that the circuit breaker assembly 7 is always kept horizontal no matter whether it is moving in the switch room 4 and/or the mechanism room 2 .

In addition, in order to ensure the heat dissipation of the sealed switchgear (switch chamber 4), the inventor has further improved the heat dissipation of the sealed switchgear, mainly by increasing the heat dissipation channel 403 and the inner wall of the switch chamber 4 Coating materials with good heat absorption performance and good heat transfer performance, the material with heat absorption performance and good heat transfer performance can be preferably black paint in consideration of low cost. As two preferred implementations of the heat dissipation channel 403, one is to fold and bend the cabinet walls, as shown in Figure 12, when multiple groups of cabinets are placed together, the inflection points at the folds between the two cabinets correspond to each other. A heat dissipation channel 403 can be formed, and the cross section of the formed heat dissipation channel can be hexagonal or rhombus according to the shape of the folding. Another embodiment of a heat dissipation channel with better manufacturability is to fixedly connect a plurality of hollow metal tubes 404 in the cabinet wall; The heat dissipation channel 403 communicated with the environment, but the switch chamber 4 can still be kept sealed.

In order to make the sealed switchgear a high-voltage sealed switchgear with excellent safety performance, the inventor provides a "five-defense" interlock assembly 29 with a high safety factor, wherein the "five-defense" interlock assembly 29 intends to realize The protective effect is that when the circuit breaker assembly 7 moves out of the sealed switchgear and translates to the transfer vehicle 33, a series of linkages with the movement of the circuit breaker assembly 7 will be started to close the second opening to avoid danger.

Referring to Figure 10, the "five-proof" interlocking assembly 29 includes a linkage 30 and a locking member 31; Figure 14 is a partially enlarged view of the linkage 30 (C-C) of the "five-proof" interlocking assembly 29 of the sealed switchgear, As shown in Figure 14, the linkage 30 includes the first linkage 32 and the second linkage on the transfer vehicle 33 (used to assist the circuit breaker assembly 7 to move out or move into the sealed switch cabinet) respectively in the mechanism room 2 34 and the clutch 35, the action is transmitted between the first linkage 32 and the second linkage 34 through the clutch 35. As a preferred embodiment, closing the second opening can be realized by the roller shutter 36 that moves downward synchronously with the movement of the circuit breaker assembly 7 and closes the second opening, so the expanded area of the roller shutter 36 is not smaller than the second opening area. The preferred embodiment of synchronous movement is that the transfer car 33 and the sealed switch cabinet are locked and fixed by the locking part 31, and the clutch part 35 will transmit the movement of the first linkage part 32 to the second linkage part 34 so as to realize two linkages. The movement between the components is linked, and then the second linkage 34 is activated by the movement of the circuit breaker assembly 7, the second linkage 34 is linked with the first linkage 32, and the roller shutter 36 moves downward with the linkage of the first linkage 32 to complete the closing The safety protection function of the second opening.

Referring to Figure 14, a preferred embodiment of the first linkage 32 in the mechanism chamber 2 is: the first linkage 32 includes a first rotating shaft 3201, a first chain 3202, and a first gear that are sequentially connected and linked. 3203, the first transmission shaft 3204, the first transmission gear a3205a, the first transmission chain 3206 and the first transmission gear b3207b; and the first transmission gear a3205a is connected with the clutch 35; Two coil springs 3601 at the end, so the movement of the first rotating shaft 3201 will drive the upward or downward movement of the roller blind 36 . In order to make the roller blind 36 move smoothly, the first chain 3202 is preferably a pair, and each first chain 3202 forms a right triangle through three first gears 3203. The sides overlap; and the two ends of the first transmission shaft 3204 are respectively connected to a pair of first gears 3203, preferably a pair of first gears 3203 connected to the acute angle of the horizontal side in a right triangle, the first transmission gear b3207b and a pair of first gears 3203 is the same as the first transmission shaft 3204 (the first transmission gear b3207b in the figure coincides with the projection of the first gear 3203). The linkage process of the first linkage 32 is: when the clutch 35 is linked with the first transmission gear a3205a, the first transmission gear a3205a is transmitted to the first transmission gear b3207b through the first transmission chain 3206, and the first transmission gear b3207b passes through the first transmission shaft 3204 continues to drive to the first gear 3203 on both sides of the first transmission rotating shaft 3204, then the first chain 3202 is transmitted through the first gear 3203 group, and then the first rotating shaft 3201 is transmitted through the first chain 3202, thereby realizing the downward movement of the roller blind 36 or upward movement.

Referring to Fig. 15, Fig. 15 is a partially enlarged view of the clutch part 35 (D-D). a3205a connection. When the sealed switchgear cabinet body is locked with the transfer vehicle 33, the transmission pin 3501 is inserted into the clutch element 3502 to realize the coupling of the clutch element 35, thereby realizing the transmission between the first linkage element 30 and the second linkage element 34. Downward or upward movement of the roller blind 36 .

With reference to shown in Fig. 15, Fig. 15 is a partial enlarged view of the second linkage 34 (D-D) wherein a preferred embodiment of the second linkage 34 on the transfer vehicle 33; As shown in Figure 15, the second linkage Part 34 includes a second transmission gear 3401, a second transmission shaft 3402, a second chain 3403, a second rotating shaft 3404, and a second gear 3405 that are sequentially connected to each other, wherein the two ends of the second rotating shaft 3404 are connected coaxially with the second rotating shaft 3404 transmission of the second gear a3405a and the second gear b3405b; in addition, in order to realize that the interlock assembly 29 and the circuit breaker assembly 7 move together, the circuit breaker assembly 7 also includes a rack 37 located on the auxiliary bracket 28, when the rack 37 and When the second gear a3405a is engaged for transmission, the second linkage member 34 moves together with the circuit breaker assembly 7 . The linkage process of the second linkage 34 is: when the rack 37 moves to a certain position of the transfer car 33 with the circuit breaker assembly 7, it will mesh with the second gear a3405a, and the rack 37 continues to move with the circuit breaker assembly 7 to drive with the second gear. The gear a3405a and the second gear b3405b with the second gear a3405a and the second rotating shaft 3404, the second chain 3403 transmits the movement of the second gear b3405b to the second transmission shaft 3402, and the second transmission shaft 3402 drives the second transmission gear 3401, The second transmission gear 3401 drives the clutch 35 . Wherein, it should be noted that the movement distance of the interlock assembly 29 driven by the rack 37, especially the movement distance of the second linkage 34 should not be less than the deployment distance of the roller blind 36; in order to save the volume of each element, different diameters can be used The second gear 3405 realizes that the diameter of the second gear a3405a meshing with the rack 37 is smaller than that of the second gear b3405b.

Fig. 16 is a partially enlarged view of the locking part 31 (E-E) of the "five-proof" interlocking assembly of the sealed switchgear; A pair of locking holes 3103 are respectively provided on the cabinet frame of the mechanism room 2 . The locking pin 3102 is connected to one end of the locking rod 3101 , the locking pin 3102 and the locking rod 3101 are also a pair and located on the transfer vehicle 33 , the shape of the locking pin 3102 matches the locking hole 3103 . The spacing between the centerlines of the two locking rods 3101 (locking pins 3102 ) and the spacing between the centers of the two locking holes 3103 are equal. The other end of the locking lever 3101 is further provided with a cam handle 3104 , and the cam handle 3104 is pivotally connected with the locking lever 3101 .

Transfer car 33 comprises a car body 3301 and the wheel 3302 that supports car body to move; Both sides on car body are all provided with transfer car guide rail 3303, and the guide rail 201 in transfer car guide rail 3303 and mechanism chamber 2 is positioned at same horizontal plane, and two The distance between the two transfer car guide rails 3303 is equal to the distance between the two guide rails 201 inside the mechanism room 2 , and the length of the transfer car guide rails 3303 is not less than the length of the circuit breaker assembly 6 . As a preferred embodiment, in order to better realize the reliable contact between the guide rail 3303 of the transfer vehicle and the guide rail 201 of the cabinet to achieve a seamless fit, the locking rod 3101 passes through the baffles 3304 provided at both ends of the guide rail 3303 of the transfer vehicle. When it is necessary to realize the above-mentioned seamless connection, first turn the cam handle 3104 left and right to lock the lever 3101, thereby driving the lock pin 3102 to rotate so that it overlaps with the lock hole 3103, and the transfer car 33 and the sealed switch cabinet are locked; then the cam The handle 3104 is pressed downwards. Since the baffle 3304 is fixed and immovable, the downward movement of the cam handle 3104 will make the locking rod 3101 pull away from the sealed switch cabinet to further lock the locking pin 3102 between the cabinet body and the transfer cart 33. The gap between is eliminated. In order to reset the locking lever 3101 to prepare for the next locking, the locking lever 3101 covers a spring 31012 , and the spring 31012 is placed between the baffle 3304 and another baffle 31011 fixed on the locking lever 3101 . In addition, a pair of matching fixing holes 38 and fixing pins 39 are provided between the circuit breaker assembly 7 and the transfer vehicle 33 for further stabilizing the circuit breaker assembly 7; on the operating part 703 of the device assembly 7.

Figure 17 is a flow chart of the working steps of the "five-proof" interlocking components of the sealed switchgear; as shown in Figure 17, the action flow of the "five-proof" interlocking is: When the transfer car 33 reaches a certain position, it will mesh with the second gear a3405a, and the rack 37 continues to move with the circuit breaker assembly 7 to drive the second gear a3405a and the second gear b3405b coaxial with the second gear a3405a, and the second chain 3403 The motion of the second gear b3405b is transmitted to the second transmission shaft 3402, the second transmission shaft 3402 drives the second transmission gear 3401, and the second transmission gear 3401 transmits the clutch 35. When the clutch 35 is linked with the first transmission gear a3205a, the first The transmission gear a3205a is transmitted to the first transmission gear b3207b through the first transmission chain 3206, and the first transmission gear b3207b is continuously transmitted to the first gears 3203 on both sides of the first transmission shaft 3204 through the first transmission shaft 3204, and then through the first gear 3203 The group drives the first chain 3202 , and then drives the first rotating shaft 3201 through the first chain 3202 , so as to realize the downward or upward movement of the roller blind 36 .

In order to ensure that after the circuit breaker assembly 7 is completely moved to the transfer vehicle 33, the roller shutter 36 will not retract upward under the rebound of the coil spring 3601 (not shown in the figure) and cause the second opening to remain open, the inventor further provides A locking assist element 40 is provided, and the linkage action is terminated by inserting the locking assist element 40 into the first transmission chain 3206. Figure 18 is a schematic structural view of the locking auxiliary element 40, as shown in Figure 18, the locking auxiliary element 40 is arranged on the inner wall of the cable chamber 3 at the same height as the locking hole 3103 of the locking member 31, including the auxiliary locking pin 4001 and the auxiliary locking pin control Rod 4002, one end of the auxiliary locking pin control rod 4002 is movably connected with the inner wall of the cable chamber 3, and the locking auxiliary element 40 is always close to the direction of the inner wall of the cable chamber 3 through a spring located at the movable connection, and the auxiliary locking pin control rod 4002 The other end is fixedly connected with the auxiliary locking pin 4001 . The auxiliary locking function of the locking auxiliary element 40 is achieved by inserting the auxiliary locking pin 4001 into the first chain 3206 of the first linkage 32 to stop the movement of the first chain 3206 . As a preferred embodiment, when the locking pin 3102 of the locking member 31 is inserted into the locking hole 3103, the locking pin 3101 simultaneously pushes up the auxiliary locking pin control rod 4002, and at this time the auxiliary locking pin 4001 can leave the first chain 3206, thus When the "five-proof" interlocking components are placed, the interlocking safety protection can be carried out with the movement of the circuit breaker component 7; and when the roller shutter 36 is completely lowered and the circuit breaker component has left the cabinet, by pulling out the locking pin 3102, the auxiliary locking pin The control rod 4002 will drive the auxiliary locking pin 4001 to stop the movement of the first chain 3206 again.

In addition, since the sealed switchgear can be used as an inflatable cabinet, an inflatable valve (not shown in the figure) can be provided on the switch chamber 4, so the inflated pressure can be determined according to the rated voltage of the electrical equipment or the different needs in specific situations. and gaseous medium.

Finally, it is necessary to explain here that: the above examples are only used to further describe the technical solutions of the present invention in detail, and cannot be interpreted as limiting the protection scope of the present invention. Some non-essential improvements and adjustments all belong to the protection scope of the present invention.

Claims (106)

1. A sealed switch cabinet, which includes a busbar room, an instrument room, a mechanism room, a cable room, a switch room and a pressure relief channel, characterized in that: the instrument room, the mechanism room and the cable room form a sealed switch cabinet The front cabinet, the busbar room, the switch room and the pressure relief passage form the rear cabinet of the sealed switch cabinet, and the switch room is sequentially arranged with an upper incoming line insulator group, a circuit breaker assembly, a grounding switch and a lower outgoing line insulator group; Each functional room area in the front cabinet and the rear cabinet is distributed in steps; the plane of the mechanism room opposite to the rear cabinet is provided with a first opening, and the plane of the switch room opposite to the front cabinet is provided with a second opening, The bottom end of the second opening is higher than the bottom end of the first opening and the top end of the second opening is not higher than the top end of the first opening, the bottom end of the first opening and the bottom end of the second opening A step is formed; the switch chamber communicates with the mechanism chamber through the first opening and the second opening; the circuit breaker assembly is built in the switch chamber and the mechanism chamber and passes through the first opening and the second opening; the The circuit breaker assembly includes a bracket, a circuit breaker, an operating part and a sealing part; wherein, the circuit breaker, the sealing part and the operating part are sequentially connected through the bracket; when a passage is formed in the sealed switch cabinet, the circuit breaker is located In the switch chamber, the operating part is located in the mechanism chamber, the sealing member includes a sealing plate and a sealing transmission shaft, the sealing plate seals the second opening, and the switch chamber is in a sealed state at this time; The circuit breaker assembly also includes a translation device, which is used to keep the circuit breaker moving on the same horizontal plane when encountering step surfaces of different heights. 2. The sealed switchgear according to claim 1, characterized in that: the upper incoming line insulator group runs through the top surface or side wall of the switch room, and is partly located in the busbar room and the switch room; The lower outlet insulator group runs through the side walls of the switch room and the cable room, and is partially located in the switch room and the cable room respectively. 3. The sealed switch cabinet according to claim 1, characterized in that: the center line of the lower outlet insulator group is parallel to the bottom surface of the cable room. 4. The sealed switchgear according to claim 1, characterized in that: the number of the upper incoming line insulator groups is the same as the number of the lower outgoing line insulator groups, or the number of the upper incoming line insulator groups is the same as the number of the lower outgoing line insulator groups Twice the outgoing line insulator group. 5. The sealed switchgear according to claim 1, characterized in that: there are three sets of insulators for the lower outgoing lines arranged in a triangle. 6. The sealed switch cabinet according to claim 1, characterized in that: a small busbar room is provided on the top of the instrument room. 7. The sealed switch cabinet according to claim 1, wherein the pressure relief channel is realized by a pressure relief valve installed on the bottom or top of the switch chamber. 8. The sealed switchgear according to claim 1, characterized in that: the instrument room, mechanism room and cable room are all equipped with doors. 9. The sealed switchgear according to claim 8, characterized in that: the door of the instrument room is provided with secondary components for control and display. 10. The sealed switchgear according to any one of claims 1-8, wherein a reliable grounding element is provided in the switch chamber. 11. The sealed switchgear according to claim 10, characterized in that: the reliable grounding element is a grounding static contact arranged on the side wall of the switch chamber and a grounding contact matching the position of the grounding static contact. A moving contact, the grounding moving contact is arranged on the circuit breaker assembly. 12. The sealed switch cabinet according to claim 1, wherein the area of the first opening is larger than the area of the second opening. 13. The sealed switch cabinet according to claim 1, wherein the second opening is formed by a side wall and/or a front wall of the switch chamber. 14. The sealed switchgear according to claim 1, characterized in that: the second opening is formed by folding the panel of the side wall of the switch room and surrounding the top wall and the bottom wall of the switch room. 15. The sealed switchgear according to claim 1, characterized in that: the second opening is formed by folding panels on the side wall of the switch room and surrounding the front wall of the switch room by removing material. 16. The sealed switchgear according to claim 15, wherein a metal fixing piece is welded to the outer periphery of the second opening. 17. The sealed switchgear according to claim 16, characterized in that: said metal fixing member selectively welds the two side walls, the front wall, the top wall and/or the bottom wall of the switch chamber. 18. The sealed switchgear according to claim 16, characterized in that: the metal fixing part is welded to the side wall of the switch chamber and/or the edge formed by bending the side wall. 19. The sealed switchgear according to claim 1, characterized in that: the upper incoming line insulator group, the circuit breaker assembly, the grounding switch and the lower outgoing line insulator group form two sets of isolating switch fractures; the upper static of the isolating switch The contact is connected to one end of the upper incoming line insulator group, the lower static contact of the isolating switch is connected to the grounding switch, and the two moving contacts of the isolating switch are independently connected to the two ends of the circuit breaker assembly. end; when the two moving contacts are respectively closed with the upper static contact and the lower static contact, the isolating switch is closed. 20. The sealed switch cabinet according to claim 1, wherein the circuit breaker is a pole of a three-phase vacuum circuit breaker. 21. The sealed switchgear according to claim 20, wherein a moving contact is provided at both ends of the pole of the three-phase vacuum circuit breaker. 22. The sealed switch cabinet according to claim 1, wherein the area of the sealing plate is not smaller than the area of the second opening and not larger than the area of the first opening. 23. The sealed switch cabinet according to claim 1, wherein the sealed transmission shaft comprises a flange, an operation transmission shaft and a bellows. 24. The sealed switchgear according to claim 23, characterized in that: the operating drive shaft passes through the bellows and the flange in sequence. 25. The sealed switch cabinet according to claim 24, wherein the flange is screwed to the sealing plate, and the two sides of the sealing plate are respectively the flange and the bellows. 26. The sealed switchgear according to claim 24, characterized in that: the operation transmission shaft is divided into a rotating part and a fixed part, and a bearing is provided between the rotating part and the fixed part. 27. The sealed switch cabinet according to claim 26, wherein the bearing is an oil-free bearing. 28. The sealed switchgear according to claim 26, characterized in that: the fixed part of the operating transmission shaft passes through the bellows, the sealing plate and the flange, and is connected with the operating member to transmit the The action of the operator. 29. The sealed switch cabinet according to claim 26, characterized in that: the rotating part of the operating transmission shaft is connected to the rotating shaft through a transmission element for transmission. 30. The sealed switchgear according to claim 26, characterized in that: the two ends of the bellows are respectively sealed and connected to the flange and the outer wall of the fixing part. 31. The sealed switch cabinet according to claim 30, characterized in that: part of the shaft body of the fixing part is solid, and the bellows is sealingly connected to the outer wall of the solid part of the fixing part. 32. The sealed switchgear according to claim 30, wherein the bellows is compressible, and the two ends of the bellows are respectively sealed and connected to the flange and the outer wall of the fixing part. 33. The sealed switchgear according to claim 1, wherein an annular metal plate is welded to the outer periphery of the second opening of the switch chamber, and the annular metal plate is used to connect and fix the sealing member. 34. The sealed switchgear according to claim 33, characterized in that: when the sealing member closes the switch chamber, the sealing plate and the annular metal plate in the sealing member are screwed and fixed, and the annular metal plate O-ring grooves with matching shapes are arranged on the opposite surface of the sealing plate. 35. The sealed switchgear according to claim 34, characterized in that: the screw holes on the annular metal plate do not penetrate through the annular metal plate. 36. The sealed switchgear according to claim 33, characterized in that: said annular metal plate is provided with at least two positioning pins, and said sealing plate is provided with positioning holes matching the positions of said positioning pins . 37. The sealed switchgear according to claim 20, characterized in that: the support includes a moving frame and a rotating shaft. 38. The sealed switchgear according to claim 37, wherein the three-phase vacuum circuit breaker poles are arranged in parallel from left to right and fixed on the rotating shaft. 39. The sealed switchgear according to claim 37, characterized in that: the moving frame comprises a bracket part and a connecting part. 40. The sealed switchgear according to claim 39, characterized in that: the connecting parts are a pair, and are arranged in parallel to independently connect the two ends of the supporting part. 41. The sealed switchgear according to claim 39, characterized in that: the support part is a pair of horizontal arms arranged in parallel, and the horizontal arms are respectively located on both sides of the circuit breaker assembly; the connecting part It includes an inverted U-shaped curved arm and two parallel vertical arms; the two ends of the curved arm are respectively connected to the same side of the two horizontal arms, and the two vertical arms are independently connected to the other side of the two horizontal arms. side. 42. The sealed switchgear according to claim 41, wherein the two vertical arms are respectively screwed to the two sides of the sealing member. 43. The sealed switchgear according to claim 41, wherein one end of the rotating shaft is movably connected to the curved arm. 44. The sealed switchgear according to claim 41, wherein a rotating pin is provided at one end of the rotating shaft, a rotating hole is provided at the joint between the curved arm and the rotating shaft, and the rotating pin and the rotating hole The positions are matched, and the swivel pin can rotate in the swivel hole. 45. The sealed switchgear according to claim 43, characterized in that: a pair of guide rails are provided in the switch chamber and are located in the middle of the rear cabinet; a pair of guide rails are provided in the mechanism chamber and are located in the middle of the front cabinet middle part. 46. The sealed switchgear according to claim 45, characterized in that: the distance between the guide rails in the switch chamber and the mechanism chamber is equal, and the distance between the two horizontal arms of the support is equal. 47. The sealed switchgear according to claim 19, characterized in that: the operating part is provided with a control element for controlling the forward and reverse rotation of the circuit breaker at 90° to realize the opening and closing of the disconnector, and the control elements are respectively The operation part is connected with the operation transmission shaft; the movement of the control element can be realized by the movement of a shift fork coaxial with the rotating shaft, and the control element is arranged on the left side of the sealing plate. 48. The sealed switchgear according to claim 47, characterized in that: the control element is fixedly connected to the sealing plate and the bracket through a metal fixing plate and corresponding connecting pieces, and the shift fork is located on the metal Between the fixed plate and the sealing plate; the control rod for manipulating the control element in the operating part passes through the sealing plate to link with the operating part. 49. The sealed switchgear according to claim 48, wherein the control rod is provided with an O-ring groove where the control rod penetrates the sealing plate, and the O-ring is placed and then fixed by screwing. 50. The sealed switchgear according to any one of claims 1 to 8, characterized in that: the switchgear is also provided with a positioning element, and the positioning element includes a pair of cabinet walls on the wall side of the switch room The locating holes on the circuit breaker and the locating pins on the circuit breaker assembly are matched in hole diameter and position. 51. The sealed switch cabinet according to claim 50, wherein the top end of the positioning bolt is a cone. 52. The sealed switchgear according to claim 1, wherein the translation device is arranged on the bracket and includes at least two positioning arms, which are respectively arranged on the horizontal arms of the bracket. 53. The sealed switchgear according to claim 52, wherein one end of the positioning arm is pivotally connected to the horizontal arm through the first guide rail positioning shaft and can rotate around the first guide rail positioning shaft. 54. The sealed switchgear according to claim 53, characterized in that: each positioning arm is provided with a positioning arm locking pin, each positioning arm is equipped with a swing arm, and the swing arm passes through the second horizontal arm. The guide rail locates the shaft and is pivotally connected with the horizontal arm. Each swing arm is provided with a sliding groove, and the pin of the positioning arm locking pin on each positioning arm is sleeved in the sliding groove of the corresponding swing arm. 55. The sealed switchgear according to claim 53, wherein the positioning arm is composed of two metal arms, the positioning arm is equipped with a swing arm, the swing arm is located between the two metal arms, and one end of the positioning arm is connected to the The horizontal arm is pivotally connected through the first guide rail positioning shaft and can rotate around the first guide rail positioning shaft, and the swing arm is pivotally connected with the horizontal arm through the second guide rail positioning shaft on the horizontal arm. 56. The sealed switchgear according to claim 55, characterized in that: each swing arm is provided with a sliding groove, and the locking pin of the positioning arm penetrates through the sliding grooves of the two metal arms and the swing arm and is welded or riveted respectively. metal arms. 57. The sealed switch cabinet according to any one of claims 54 or 56, characterized in that: the other end of each positioning arm is connected with a roller, and the length of the positioning arm is not less than the second opening of the switch cabinet formed by the first opening. the step length. 58. The sealed switchgear according to claim 57, characterized in that: one end of the sliding groove close to the roller is respectively provided with a locking groove. 59. The sealed switchgear according to claim 58, characterized in that there are four positioning arms and four swing arms each, and two positioning arms and two swing arms are provided on each horizontal arm. 60. The sealed switch cabinet according to claim 59, wherein a spring is provided at the first guide rail positioning shaft and the second guide rail positioning shaft. 61. The sealed switchgear according to claim 60, characterized in that: the translation device is configured for when the circuit breaker assembly needs to be pulled out of the switch cabinet for detection, the circuit breaker assembly first moves on the guide rail in the switch room through the translation device , all positioning arms and swinging arms are stored in the horizontal arms under the action of gravity of the circuit breaker assembly and the fixed support force of the guide rail. When the rollers on the group of positioning arms closest to the sealing plate leave the guide rail of the switch room The rollers of the positioning arm will lose the fixed support force of the guide rail; that is, under the gravity of the circuit breaker assembly, the positioning arm and the swing arm will be lowered in the vertical direction and leave the horizontal arm, and the positioning arm will change from horizontal to vertical. At the same time, the positioning arm The length of the ladder will make up for the height difference of the stepped guide rail. The rollers of the positioning arm will make the circuit breaker assembly still move on the same level, that is, continue to move on the guide rail of the mechanism room. Conversely, when the circuit breaker assembly needs to be pushed into the switch cabinet room, The operator needs to push the circuit breaker assembly to move through the bracket. At this time, the positioning arm is still in the vertical direction. When a group of swing arms in the translation device that are closest to the steps of the switch room and the mechanism room will contact the end face of the step corner to generate squeeze Pressure, under the action of extrusion force, the swing arm rotates upwards, and at the same time drives the positioning arm locking pin on the positioning arm to slide in the sliding groove, thereby driving the positioning arm to rotate upwards, and finally makes the positioning arm locking pin move to the sliding groove At this time, the positioning arm and swing arm of this group are stored in the horizontal arm, and the rollers of the positioning arm will roll on the guide rail of the switch cabinet; at this time, continue to push the circuit breaker assembly forward, and when all the positioning arms and When the swing arms are all received in the horizontal arm, the rollers in the horizontal arm can completely move on the guide rail of the switch cabinet. 62. The sealed switch cabinet according to claim 1, characterized in that, except for the second opening, the walls of the other switch rooms are closed. 63. The sealed switch cabinet according to any one of claims 1-8, characterized in that: the switch chamber further includes at least one heat dissipation channel. 64. The sealed switchgear according to claim 63, characterized in that: the heat dissipation channel folds and bends the walls of multiple switchgears, when multiple sealed switchgears are put together, two sealed switchgears The inflection points at the folds between the two correspond to each other to form a heat dissipation channel. 65. The sealed switchgear according to claim 64, wherein the cross-section of the heat dissipation channel is hexagonal or rhombus. 66. The sealed switchgear according to claim 63, characterized in that: the wall of the switch chamber is fixedly connected with a plurality of hollow metal pipes, and the metal pipes run through the top and bottom surfaces of the switch chamber to form a plurality of cooling holes connected to the environment aisle. 67. The sealed switchgear according to claim 19, wherein the lower static contact is connected to the grounding switch through an L-shaped metal connector. 68. The sealed switchgear according to claim 67, characterized in that: the metal connector includes a vertical part and a horizontal part, one side of the vertical part is connected to the insulator of the grounding switch, and the other side is connected to the bus bar; The part is connected with the lower static contact. 69. The sealed switchgear according to claim 1, characterized in that: said switch chamber is also provided with an air charging valve. 70. The sealed switchgear according to any one of claims 1 to 8, characterized in that: the sealed switchgear is also provided with a disconnector observation window, and the isolation switch observation window consists of two observation windows respectively located in the instrument room. Window A and observation window B of the switch room. 71. The sealed switchgear according to claim 70, wherein the observation window A and the observation window B are concentric and have increasing areas. 72. The sealed switchgear according to claim 70, wherein the area of the observation window A is smaller than that of the observation window B. 73. The sealed switch cabinet according to claim 70, wherein the observation window B passes through the plane openings opposite the switch room and the instrument room, and a transparent sealing window is provided inside the opening of the switch room. 74. The sealed switchgear according to any one of claims 1-8, characterized in that: the sealed switchgear is also provided with an observation window for the grounding switch, and the observation window for the grounding switch consists of the observation windows C respectively located in the cable room. It is composed of the observation window D of the switch room. 75. The sealed switchgear according to claim 74, characterized in that: the observation window C and the observation window D are concentric and have increasing areas. 76. The sealed switchgear according to claim 74, wherein the area of the observation window C is smaller than that of the observation window D. 77. The sealed switchgear according to claim 74, wherein the observation window D passes through the plane openings opposite the switch room and the instrument room, and a transparent sealing window is provided inside the opening of the switch room. 78. The sealed switchgear according to any one of claims 1-8, characterized in that: the switchgear further includes an interlocking component, when the circuit breaker component is moved out of the switchgear, the interlocking component The opening is closed. 79. The sealed switchgear according to claim 78, characterized in that: the interlocking assembly includes a linkage, a roller shutter, a locking piece and a transfer vehicle, after the transfer vehicle locks the sealed switchgear through the locking piece, The linkage is activated, and the second opening is closed by the roller shutter that moves with the linkage. 80. The sealed switchgear according to claim 79, wherein the transfer vehicle is used to assist the circuit breaker assembly to move out or into the sealed switchgear. 81. The sealed switchgear according to claim 79, wherein the expanded area of the roller shutter is not smaller than the area of the second opening. 82. The sealed switchgear according to claim 79, characterized in that: the linkage includes a first linkage installed in the mechanism room, a second linkage and a clutch on the transfer vehicle; the first linkage and the second linkage The action is transmitted between the two linkages through the clutch; the transfer car and the sealed switch cabinet are locked and fixed by the lock, and the clutch will transmit the movement of the first linkage to the second linkage, and then the movement of the circuit breaker assembly will start the second. Two linkages, the second linkage is linked with the first linkage, and the roller blind moves downward with the linkage of the first linkage to complete the closing of the second opening. 83. The sealed switch cabinet according to claim 82, characterized in that: the first linkage includes the first shaft, the first chain group, the first gear, the first transmission shaft, and the first transmission gear a , the first transmission chain and the first transmission gear b; and the first transmission gear a is connected with the clutch; the roller blind is installed in the mechanism room through two coil springs at both ends of the first rotating shaft, so the movement of the first rotating shaft will drive the roller blind upward or downward movement; the linkage process of the first linkage is: when the clutch links the first transmission gear a, the first transmission gear a is transmitted to the first transmission gear b through the first transmission chain, and the first transmission gear b passes through The first transmission shaft continues to drive to the first gears on both sides of the first transmission shaft, then the first chain is transmitted through the first gear set, and then the first shaft is transmitted through the first chain, so as to realize the downward or upward movement of the roller blind. 84. The sealed switchgear according to claim 83, characterized in that: there is a pair of first chains, and each first chain forms a right triangle through three first gears, and when the roller blind is fully unfolded downward, it forms a right triangle The sides of the triangle overlap. 85. The sealed switchgear according to claim 84, wherein the first transmission shaft is connected to a pair of first gears at the acute angle of the horizontal side of the right triangle. 86. The sealed switchgear according to claim 83, wherein the second linkage comprises a second transmission gear, a second transmission shaft, a second chain, a second rotating shaft, a second gear a and The second gear b, wherein the two ends of the second rotating shaft are connected with the second gear a and the second gear b which are coaxially transmitted with the second rotating shaft. 87. The sealed switchgear according to claim 1, wherein the translation device further includes a pair of auxiliary brackets fixedly connected to both sides of the operating part, and each auxiliary bracket is provided with rollers, wherein the auxiliary bracket rollers The axle center and the axle center of the positioning arm roller are in the same horizontal plane. 88. The sealed switchgear according to claim 87, characterized in that: the circuit breaker assembly further includes a rack on the auxiliary bracket, when the rack is engaged with the second gear a for transmission, the second linkage is connected with The circuit breaker assembly moves in unison. 89. The sealed switchgear according to claim 86, characterized in that: the linkage process of the second linkage is: when the rack moves to a certain position of the transfer vehicle with the circuit breaker assembly, it will mesh with the second gear a, The rack continues to move with the circuit breaker assembly to drive the second gear a and the second gear b that is the same as the second shaft with the second gear a, and the second chain transmits the movement of the second gear b to the second transmission shaft, and the second transmission The shaft drives the second transmission gear, and the second transmission gear drives the clutch. 90. The sealed switchgear according to claim 89, wherein the movement distance of the interlocking component driven by the rack is not less than the unfolding distance of the roller blind. 91. The sealed switchgear according to claim 89, wherein the moving distance of the second linkage is not less than the unfolding distance of the roller blind. 92. The sealed switch cabinet according to claim 89, wherein the second gear a has a smaller diameter than the second gear b. 93. The sealed switchgear according to claim 89, characterized in that: the clutch part comprises a driving pin and a clutch element in coordinated connection, and the clutch element is connected with the first transmission gear a. 94. The sealed switchgear according to claim 93, characterized in that: when the body of the sealed switchgear is locked with the transfer vehicle, the transmission pin is inserted into the clutch element to realize the coupling of the clutch, thereby realizing the first linkage and The transmission between the second linkages realizes the downward or upward movement of the roller blind. 95. The sealed switchgear according to claim 93, characterized in that: the locking member includes a locking rod, a locking pin and a locking hole; the locking holes are a pair and are respectively arranged on the cabinet frame of the mechanism room; the locking pin and One end of the locking rod is connected, the locking pin and the locking rod are also a pair and are located on the transfer vehicle, and the shape of the locking pin matches the locking hole. 96. The sealed switchgear according to claim 95, wherein the distance between the centerlines of the two locking rods and the distance between the centers of the two locking holes are equal. 97. The sealed switchgear according to claim 96, wherein a cam handle is provided at the other end of the locking lever, and the cam handle is pivotally connected with the locking lever. 98. The sealed switchgear as claimed in claim 97, wherein the transfer vehicle includes a car body and wheels supporting the movement of the car body; both sides of the car body are provided with transfer car guide rails, and the transfer car guide rails and the mechanism The guide rails in the room are located in the same horizontal plane, and the distance between the two guide rails of the transfer vehicle is equal to the distance between the two guide rails inside the mechanism room, that is, the guide rails of the two transfer vehicles are at the same height and distance as the guide rails in the mechanism room; The length is not less than the length of the circuit breaker assembly. 99. The sealed switchgear according to claim 98, characterized in that: a baffle plate is set at both ends of the guide rail of the transfer vehicle, each of the pair of locking rods runs through the baffle plate at both ends of the guide rail, and a pair of cams Handles, each cam handle is located on the fence side of one end of a locking lever. 100. The sealed switchgear according to claim 99, characterized in that the locking lever is covered with a spring, and the spring is arranged between the baffle and another baffle fixed on the locking lever. 101. The sealed switchgear according to claim 100, wherein the circuit breaker assembly and the transfer workshop are further provided with a pair of matching fixing holes and fixing pins for further stabilizing the circuit breaker assembly. 102. The sealed switchgear according to claim 101, characterized in that: the fixing holes are arranged on the transfer vehicle, and the fixing pins are arranged on the operating parts of the circuit breaker assembly. 103. The sealed switchgear according to claim 101, characterized in that: said sealed switchgear further comprises a locking auxiliary element, and the locking auxiliary element is used to stop the movement of the interlocking assembly. 104. The sealed switchgear according to claim 103, characterized in that: the locking auxiliary element is arranged on the inner wall of the cable chamber at the same height as the locking hole of the locking piece, and includes an auxiliary locking pin and an auxiliary locking pin control rod, the auxiliary locking pin One end of the locking pin control rod is movably connected with the inner wall of the cable chamber, and the auxiliary locking element is always close to the inner wall of the cable chamber through a spring located at the movable connection; the other end of the auxiliary locking pin control rod is fixedly connected with the auxiliary locking pin. 105. The sealed switchgear according to claim 104, wherein the auxiliary locking pin is inserted into the first chain of the first linkage to stop the movement of the first chain to stop the movement of the linkage. 106. The sealed switchgear according to claim 105, characterized in that: when the locking pin of the locking member is inserted into the locking hole, the locking pin pushes up the control rod of the auxiliary locking pin at the same time, and at this time the auxiliary locking pin leaves the first chain , and then the interlocking component can perform interlocking safety protection with the movement of the circuit breaker component; and when the roller shutter is fully lowered and the circuit breaker component has left the sealed switchgear cabinet, by pulling out the locking pin, the auxiliary locking pin control lever will Bringing the auxiliary locking pin to re-suspend the movement of the first chain.