CN209461323U - An interlocking mechanism of an integrated switch mechanism - Google Patents

Abstract

An interlocking mechanism of an integrated switch mechanism of the utility model is characterized in that: the interlocking mechanism is combined with an operating mechanism to limit the operation sequence of the arc extinguishing chamber, the isolating switch, the grounding switch and the lower cabinet door; The operating mechanism is provided with a grounding operation hole and an isolation operation hole. The ground operation hole can pass through the operating handle for opening and closing the grounding switch. The isolation operation hole can pass through the operating handle for opening and closing the grounding switch. Isolating switch; the interlocking mechanism includes a lower door interlocking plate, an interlocking top plate, a grounding interlocking plate, an intermediate interlocking plate and an isolation interlocking plate. It has the advantages of reliable interlocking and convenient operation.

Description

An interlocking mechanism of an integrated switch mechanism

technical field

The utility model relates to the field of electrical equipment, in particular to a high-voltage switch cabinet.

Background technique

In power systems, switchgears are widely used as power distribution equipment. The main function of switchgear is to switch, control and protect electrical equipment during the process of power generation, transmission, distribution and power conversion in the power system. The components in the switch cabinet are mainly composed of circuit breakers, disconnectors, load switches, operating mechanisms, transformers and various protection devices.

There are various structures of existing switch cabinets, and customers continue to put forward new requirements for the design of switch cabinets. For example, some customers have very high requirements for the volume of the switchgear, requiring the size of the switchgear to be less than 500x900x1800mm, but the various parameters of each electrical component (including temperature rise, safety distance, etc.) must meet the national standard, which brings design problems. It was very difficult. Moreover, vacuum circuit breakers, load switches, cabinets, insulating cylinders, insulating arms, and isolating blades in the switch mechanism all need to be structurally improved according to the design idea of miniaturization and integration.

In addition, it is worth mentioning that the interlock structure is designed to prevent the operator from misoperation of the switch, and it is mainly for the personal protection of the switch itself and the operators, maintenance and repair personnel. Whether it is power transmission operation or power outage maintenance work, it is carried out according to certain operating procedures. The design of interlocking is a hard restriction, which is to ensure that the order of operations cannot be skipped and is effective. However, the common interlocking structure cannot be applied to miniaturized and integrated switch cabinets.

Therefore, how to design and improve the structure of the existing vacuum circuit breaker, load switch, cabinet, especially the insulating cylinder, insulating arm, and isolating blade in the switch mechanism, so that it can meet the requirements of a miniaturized and integrated switch The use requirements of the cabinet is a problem to be solved urgently by those skilled in the art.

Utility model content

One purpose of the utility model is to provide an integrated circuit breaker with compact structure, small volume, reliable interlocking and long service life.

Another object of the present utility model is to provide a miniaturized, safe and reliable switchgear using the above-mentioned integrated circuit breaker.

One purpose of the utility model is to provide an integrated load switch with compact structure, small volume, reliable interlock and long service life.

Another object of the present utility model is to provide a miniaturized, safe and reliable switchgear using the above-mentioned integrated load switch.

One purpose of the utility model is to provide an integrated combined electric appliance with compact structure, small volume, reliable interlocking and long service life.

Another object of the present utility model is to provide a miniaturized, safe and reliable switchgear using the above-mentioned integrated combined electric appliance.

In addition, the utility model also provides a miniaturized, safe, reliable, convenient and flexible integrated switch cabinet that can simultaneously meet the above-mentioned integrated circuit breaker, integrated load switch, and integrated combined electrical installation.

Moreover, the integrated circuit breaker, integrated load switch, and integrated combined electrical appliance in the utility model adopt the same interlocking structure, isolating knife plate structure, insulating crank arm structure and insulating cylinder structure. Therefore, the utility model also has the following four sub-purposes:

The first sub-objective of the utility model is to provide an interlocking mechanism of an integrated switch mechanism with reliable interlocking and convenient operation.

The second sub-objective of the utility model is to provide an isolating knife plate of an integrated switch mechanism with reliable contact, small temperature rise and long service life.

The third purpose of the utility model is to provide an insulating cylinder with small volume, less materials, high strength and meeting the requirements of creepage distance.

The fourth sub-objective of the utility model is to provide an insulating crank arm of an integrated switch mechanism with high strength, large bearing capacity and small volume.

In order to achieve the above purpose, the technical solution adopted by the utility model is: an integrated circuit breaker includes a chassis, a circuit breaker arc extinguishing chamber, an isolating switch, a circuit breaker grounding switch, an operating mechanism, an interlocking mechanism, an insulating cylinder and an insulating switch. arm;

The base frame is used to support and install the circuit breaker interrupter, the isolating switch, the circuit breaker grounding switch, the operating mechanism, the interlocking mechanism, the insulating cylinder and the insulating arm , the underframe is also used for fixed installation on the switch cabinet body;

The operating mechanism drives the arc extinguishing chamber of the circuit breaker, the isolating switch and the grounding switch of the circuit breaker to open and close;

The arc extinguishing chamber of the circuit breaker can break load current and short-circuit current;

The isolating switch is used to isolate the power supply; the isolating switch includes three sets of isolating blades, the isolating blades are four-blade structure, and each group of isolating blades includes a blade, a compression bolt, a compression nut, Contact springs and spacer sleeves, the blades are four pieces, the compression bolts and the compression nuts are two groups, the compression bolts pass through the two ends of the four blades, and pass through the The compression nut is fixed, the blade can slide on the compression bolt, the contact spring is arranged between the two inner blades, and the contact spring is sleeved on the compression bolt Above, the contact spring forces the inner two blades to slide outward, the spacer sleeve is set between the inner blade and the outer blade, and the spacer sleeve is sleeved on the pressing bolt Above, the spacer sleeve is used to limit the minimum distance between the inner blade and the outer blade;

The grounding switch of the circuit breaker is used to switch the grounding wire; the grounding switch of the circuit breaker includes a first grounding contact, a first grounding knife, a first rotating shaft, a first pull plate and a first tension spring; the first grounding The contacts are fixedly arranged at the lower end of the arc extinguishing chamber of the circuit breaker, the first grounding knife is fixedly arranged on the first rotating shaft, the first rotating shaft is rotatably arranged on the bottom frame, and the first pull plate fixedly arranged on the first rotating shaft, the first tension spring is arranged between the first pull plate and the bottom frame; the first grounding contact is a columnar contact, and the first grounding knife It is a double knife plate structure, and there are two first tension springs, which are respectively arranged at both ends of the first tension plate;

The interlock mechanism combined with the operating mechanism is used to limit the operation sequence of the circuit breaker arc extinguishing chamber, the isolating switch, the circuit breaker grounding switch and the lower cabinet door; the operating mechanism is provided with a grounding operation hole and an isolation operation hole, the grounding operation hole can pass through the operating handle for opening and closing the grounding switch of the circuit breaker, and the isolation operation hole can pass through the operating handle for opening and closing the isolation switch; The interlocking mechanism includes a lower door interlocking plate, an interlocking top plate, a grounding interlocking plate, an intermediate interlocking plate and an isolation interlocking plate; the lower door interlocking plate is fixedly arranged on the lower cabinet door, and the lower door interlocking There are lock holes along the vertical direction on the plate, the interlocking top plate is in the shape of 7, the interlocking top plate is hinged on the operating mechanism along the inner and outer directions, and the two ends of the interlocking top plate can respectively touch the lower door link. The locking plate and the grounding interlocking plate, the grounding interlocking plate is slidably arranged on the operating mechanism in the vertical direction, the grounding interlocking plate extends inwardly to form a contact protrusion, and the upper end of the interlocking top plate can be Contradicting the contact protrusion, a lock column is arranged under the contact protrusion, and the lock column can enter and exit the lock hole, and a ground interlock tension spring is arranged between the ground interlock plate and the operating mechanism, The grounding interlocking tension spring forces the grounding interlocking plate to slide upwards, the intermediate interlocking plate is slidably arranged on the operating mechanism along the vertical direction, and the intermediate interlocking plate and the operating mechanism are arranged between There is an intermediate interlocking tension spring, which forces the intermediate interlocking plate to slide upwards, and the isolation interlocking plate is slid on the operating mechanism along the vertical direction; wherein the interlocking top plate has two The end is provided with a contact disc.

When the lower cabinet door is opened, the arc extinguishing chamber of the circuit breaker and the isolating switch are in the open state, the grounding switch of the circuit breaker is in the closed state, and the grounding interlocking plate is in the state of the interlocking tension spring. Under the action, it is at the uppermost end and blocks the grounding operation hole, restricting the operation of the grounding switch of the circuit breaker; when the lower cabinet door is closed, the lower door interlocking plate touches the lower end of the interlocking top plate, and the The interlocking top plate is overturned, and the top of the interlocking top plate touches the contact protrusion, so that the grounding interlocking plate slides downward, the lock column enters the lock hole, and the grounding operation hole is opened. Perform the opening operation of the grounding switch of the circuit breaker; the grounding switch of the circuit breaker is opened, and the intermediate interlocking plate is driven to slide down through the operating mechanism until the grounding operation hole and the isolation operation hole are both In the open state, the closing operation of the isolating switch can be performed at this time; when the isolating switch is closed, the operating mechanism drives the intermediate interlocking plate to slide down until the intermediate interlocking plate blocks the The grounding operation hole is restricted to operate the grounding operation hole. At this time, the closing operation of the arc extinguishing chamber of the circuit breaker can be performed; The locking plate slides upward until the isolation interlocking plate blocks the isolation operation hole, restricting the operation of the isolation switch;

The insulating cylinder is used for insulation protection, and for installing the arc extinguishing chamber of the circuit breaker and the isolating switch; the insulating cylinder includes a cylinder body, an extension section and an arch section, and the cylinder body is used for installing the circuit breaker The arc extinguishing chamber, the extension section is arranged above the cylinder body, the arch section is arranged above the extension section, the arch section is in the shape of an arch, and the arch section is used to install the disconnector, and The isolating switch is allowed to pass through; the lower end of the insulating cylinder is provided with a cylinder hinge hole, the insulating arm is hinged in the cylinder hinge hole, and a cylinder insert is arranged in the cylinder hinge hole, and the cylinder insert a reinforcing rod extending outward along the diameter direction;

The insulating crutches are used to connect the arc extinguishing chamber of the circuit breaker and the operating mechanism. The insulating crutches are in the shape of broken lines. Both ends of the insulating crutches are provided with crutch hinge holes. The middle section of the insulating crutches is A mounting hole is opened, and the insulating crank arm is hinged in the hinge hole of the barrel by passing through the rotating shaft in the mounting hole. A crank arm insert is arranged in the hinge hinge hole of the crank arm. Set with floral pieces.

An integrated load switch includes a chassis, a load switch interrupter, an isolating switch, a load switch grounding switch, an operating mechanism, an interlock mechanism, an insulating cylinder, and an insulating arm;

The chassis is used to support and install the circuit breaker interrupter, the isolating switch, the load switch grounding switch, the operating mechanism, the interlocking mechanism, the insulating cylinder and the insulating arm , the underframe is also used for fixed installation on the switch cabinet body;

The operating mechanism drives the arc extinguishing chamber of the load switch, the isolating switch and the grounding switch of the load switch to open and close;

The load switch arc extinguishing chamber can break the load current;

The isolating switch is used to isolate the power supply; the isolating switch includes three sets of isolating blades, the isolating blades are four-blade structure, and each group of isolating blades includes a blade, a compression bolt, a compression nut, Contact springs and spacer sleeves, the blades are four pieces, the compression bolts and the compression nuts are two groups, the compression bolts pass through the two ends of the four blades, and pass through the The compression nut is fixed, the blade can slide on the compression bolt, the contact spring is arranged between the two inner blades, and the contact spring is sleeved on the compression bolt Above, the contact spring forces the inner two blades to slide outward, the spacer sleeve is set between the inner blade and the outer blade, and the spacer sleeve is sleeved on the pressing bolt Above, the spacer sleeve is used to limit the minimum distance between the inner blade and the outer blade;

The load switch grounding switch is used to switch the grounding wire; the load switch grounding switch includes a second grounding contact, a second grounding knife, a second rotating shaft, a second pull plate and a second tension spring; the second grounding The contact is fixedly arranged at the lower end of the load switch arc extinguishing chamber, the second grounding knife is fixedly arranged on the second rotating shaft, the second rotating shaft is rotatably arranged on the bottom frame, and the second pull plate fixedly arranged on the second rotating shaft, the second tension spring is arranged between the second pull plate and the bottom frame; the second grounding contact is a claw structure, and the second grounding knife It is a single blade structure;

The interlock mechanism combined with the operating mechanism is used to limit the operating sequence of the load switch arc extinguishing chamber, the isolating switch, the load switch grounding switch and the lower cabinet door; the operating mechanism is provided with a grounding operation Hole and isolation operation hole, the grounding operation hole can pass through the operating handle, and is used to open and close the grounding switch of the load switch, and the isolation operation hole can pass through the operating handle, and is used to open and close the isolation switch; The interlocking mechanism includes a lower door interlocking plate, an interlocking top plate, a grounding interlocking plate, an intermediate interlocking plate and an isolation interlocking plate; the lower door interlocking plate is fixedly arranged on the lower cabinet door, and the lower door interlocking There are lock holes along the vertical direction on the plate, the interlocking top plate is in the shape of 7, the interlocking top plate is hinged on the operating mechanism along the inner and outer directions, and the two ends of the interlocking top plate can respectively touch the lower door link. The locking plate and the grounding interlocking plate, the grounding interlocking plate is slidably arranged on the operating mechanism in the vertical direction, the grounding interlocking plate extends inwardly to form a contact protrusion, and the upper end of the interlocking top plate can be Contradicting the contact protrusion, a lock column is arranged under the contact protrusion, and the lock column can enter and exit the lock hole, and a ground interlock tension spring is arranged between the ground interlock plate and the operating mechanism, The grounding interlocking tension spring forces the grounding interlocking plate to slide upwards, the intermediate interlocking plate is slidably arranged on the operating mechanism along the vertical direction, and the intermediate interlocking plate and the operating mechanism are arranged between There is an intermediate interlocking tension spring, which forces the intermediate interlocking plate to slide upwards, and the isolation interlocking plate is slid on the operating mechanism along the vertical direction; wherein the interlocking top plate has two The end is provided with a contact disc.

When the lower cabinet door is opened, the arc extinguishing chamber of the load switch and the isolating switch are in the open state, the ground switch of the load switch is in the closed state, and the ground interlock plate is in the interlock spring. Under the action, it is at the uppermost end and blocks the grounding operation hole, restricting the operation of the grounding switch of the load switch; when the lower cabinet door is closed, the lower door interlocking plate touches the lower end of the interlocking top plate, and the The interlocking top plate is overturned, and the top of the interlocking top plate touches the contact protrusion, so that the grounding interlocking plate slides downward, the lock column enters the lock hole, and the grounding operation hole is opened. Carry out the opening operation of the grounding switch of the load switch; the grounding switch of the load switch is opened, and the intermediate interlocking plate is driven to slide down through the operating mechanism until the grounding operation hole and the isolation operation hole are both In the open state, the closing operation of the isolating switch can be performed at this time; when the isolating switch is closed, the operating mechanism drives the intermediate interlocking plate to slide down until the intermediate interlocking plate blocks the The grounding operation hole restricts the operation of the grounding operation hole. At this time, the closing operation of the arc extinguishing chamber of the load switch can be performed; The locking plate slides upward until the isolation interlocking plate blocks the isolation operation hole, restricting the operation of the isolation switch;

The insulating cylinder is used for insulation protection, and for installing the load switch interrupter and the isolating switch; the insulating cylinder includes a cylinder body, an extension section and an arch section, and the cylinder body is used for installing the load switch switch interrupter, the extension section is arranged above the cylinder body, the arch section is arranged above the extension section, the arch section is in the shape of an arch, and the arch section is used to install the disconnector, and The isolating switch is allowed to pass through; the lower end of the insulating cylinder is provided with a cylinder hinge hole, the insulating arm is hinged in the cylinder hinge hole, and a cylinder insert is arranged in the cylinder hinge hole, and the cylinder insert a reinforcing rod extending outward along the diameter direction;

The insulating crutches are used to connect the load switch arc extinguishing chamber and the operating mechanism. The insulating crutches are in the shape of broken lines. Both ends of the insulating crutches are provided with crutch hinge holes. The middle section of the insulating crutches is A mounting hole is opened, and the insulating crank arm is hinged in the hinge hole of the barrel by passing through the rotating shaft in the mounting hole. A crank arm insert is arranged in the hinge hinge hole of the crank arm. Set with floral pieces.

An integrated combined electrical appliance includes a chassis, a load switch interrupter, an isolating switch, a grounding switch for the combined electrical appliance, an operating mechanism, an interlocking mechanism, an insulating cylinder, an insulating arm and a fuse;

The chassis is used to support and install the circuit breaker interrupter, the isolating switch, the grounding switch of the combined electrical appliance, the operating mechanism, the interlocking mechanism, the insulating cylinder and the insulating arm , the underframe is also used for fixed installation on the switch cabinet body;

The operating mechanism drives the arc extinguishing chamber of the load switch, the isolating switch and the grounding switch of the combined electrical appliance to open and close;

The load switch arc extinguishing chamber can break the load current;

The fuse is used to break the short-circuit current; the fuse includes a mounting base, an insulator and a melting core, the upper end of the mounting base is fixed at the lower end of the load switch arc extinguishing chamber, and the lower end of the mounting base is fixed by the insulator It is arranged on the bottom frame, and the fuse core is clamped on the mounting seat;

The isolating switch is used to isolate the power supply; the isolating switch includes three sets of isolating blades, the isolating blades are four-blade structure, and each group of isolating blades includes a blade, a compression bolt, a compression nut, Contact springs and spacer sleeves, the blades are four pieces, the compression bolts and the compression nuts are two groups, the compression bolts pass through the two ends of the four blades, and pass through the The compression nut is fixed, the blade can slide on the compression bolt, the contact spring is arranged between the two inner blades, and the contact spring is sleeved on the compression bolt Above, the contact spring forces the inner two blades to slide outward, the spacer sleeve is set between the inner blade and the outer blade, and the spacer sleeve is sleeved on the pressing bolt Above, the spacer sleeve is used to limit the minimum distance between the inner blade and the outer blade;

The combined electrical grounding switch is used to turn on and off the grounding wire; the combined electrical grounding switch includes a third grounding contact, a third grounding knife, a third rotating shaft, a third pull plate and a third tension spring; the third grounding The contact is fixedly arranged on the lower end of the mounting seat, the third grounding knife is fixedly arranged on the third rotating shaft, the third rotating shaft is rotatably arranged on the bottom frame, and the third pull plate is fixedly arranged on the On the third rotating shaft, the third tension spring is arranged between the third pull plate and the bottom frame; the third grounding contact is a claw structure, and the third grounding blade is a single blade structure, The third grounding knife is snapped into the third grounding contact from top to bottom;

The interlock mechanism combined with the operating mechanism is used to limit the operation sequence of the load switch arc extinguishing chamber, the isolating switch, the grounding switch of the combined electrical appliance and the lower cabinet door; the operating mechanism is provided with a grounding operation Hole and isolation operation hole, the ground operation hole can pass through the operating handle, and is used to open and close the grounding switch of the combined electrical appliance, and the isolation operation hole can pass through the operation handle, and is used to open and close the isolation switch; The interlocking mechanism includes a lower door interlocking plate, an interlocking top plate, a grounding interlocking plate, an intermediate interlocking plate and an isolation interlocking plate; the lower door interlocking plate is fixedly arranged on the lower cabinet door, and the lower door interlocking There are lock holes along the vertical direction on the plate, the interlocking top plate is in the shape of 7, the interlocking top plate is hinged on the operating mechanism along the inner and outer directions, and the two ends of the interlocking top plate can respectively touch the lower door link. The locking plate and the grounding interlocking plate, the grounding interlocking plate is slidably arranged on the operating mechanism in the vertical direction, the grounding interlocking plate extends inwardly to form a contact protrusion, and the upper end of the interlocking top plate can be Contradicting the contact protrusion, a lock column is arranged under the contact protrusion, and the lock column can enter and exit the lock hole, and a ground interlock tension spring is arranged between the ground interlock plate and the operating mechanism, The grounding interlocking tension spring forces the grounding interlocking plate to slide upwards, the intermediate interlocking plate is slidably arranged on the operating mechanism along the vertical direction, and the intermediate interlocking plate and the operating mechanism are arranged between There is an intermediate interlocking tension spring, which forces the intermediate interlocking plate to slide upwards, and the isolation interlocking plate is slid on the operating mechanism along the vertical direction; wherein the interlocking top plate has two The end is provided with a contact disc.

When the lower cabinet door is opened, the arc extinguishing chamber of the load switch and the isolating switch are in the opening state, the grounding switch of the combined electrical appliance is in the closing state, and the grounding interlocking plate is in the state of the interlocking tension spring. Under the action, it is at the uppermost end and blocks the grounding operation hole, restricting the operation of the grounding switch of the combined electrical appliance; when the lower cabinet door is closed, the lower door interlocking plate touches the lower end of the interlocking top plate, and the The interlocking top plate is overturned, and the top of the interlocking top plate touches the contact protrusion, so that the grounding interlocking plate slides downward, the lock column enters the lock hole, and the grounding operation hole is opened. Perform the opening operation of the grounding switch of the combined electrical appliance; the grounding switch of the combined electrical appliance is opened, and the intermediate interlocking plate is driven to slide down through the operating mechanism until the grounding operation hole and the isolation operation hole are both In the open state, the closing operation of the isolating switch can be performed at this time; when the isolating switch is closed, the operating mechanism drives the intermediate interlocking plate to slide down until the intermediate interlocking plate blocks the The grounding operation hole restricts the operation of the grounding operation hole. At this time, the closing operation of the arc extinguishing chamber of the load switch can be performed; The locking plate slides upward until the isolation interlocking plate blocks the isolation operation hole, restricting the operation of the isolation switch;

The insulating cylinder is used for insulation protection, and for installing the load switch interrupter and the isolating switch; the insulating cylinder includes a cylinder body, an extension section and an arch section, and the cylinder body is used for installing the load switch switch interrupter, the extension section is arranged above the cylinder body, the arch section is arranged above the extension section, the arch section is in the shape of an arch, and the arch section is used to install the disconnector, and The isolating switch is allowed to pass through; the lower end of the insulating cylinder is provided with a cylinder hinge hole, the insulating arm is hinged in the cylinder hinge hole, and a cylinder insert is arranged in the cylinder hinge hole, and the cylinder insert a reinforcing rod extending outward along the diameter direction;

The insulating crutches are used to connect the load switch arc extinguishing chamber and the operating mechanism. The insulating crutches are in the shape of broken lines. Both ends of the insulating crutches are provided with crutch hinge holes. The middle section of the insulating crutches is A mounting hole is opened, and the insulating crank arm is hinged in the hinge hole of the barrel by passing through the rotating shaft in the mounting hole. A crank arm insert is arranged in the hinge hinge hole of the crank arm. Set with floral pieces.

As the same improvement of the above three switch mechanisms, the front end of the knife plate is provided with a deformation groove, and the inner side of the front end of the knife plate is provided with arc-shaped protrusions. There are two arc-shaped protrusions located on both sides of the deformation groove. side. The contact springs are also arranged between the knife plate and the compression bolt, and between the knife plate and the compression nut, and the contact springs on both sides force the two outer pieces The blade slides inwardly; gaskets are arranged between the blades on both sides and the contact springs. The extension section is provided with a first shed, the first shed is connected to the sheath of the cylinder, the second shed is provided on both sides of the arch section; raised. A crank shed is provided between the hinge hinge holes at both ends and the installation hole; a limit ring is arranged on the outer side of the crank insert, and a flower groove is opened on the inner side of the flower; the hinged arm The hole is offset upwards.

A circuit breaker switchgear, including a circuit breaker, and also includes a switch cabinet body, an upper cabinet door, a lower cabinet door, a current transformer, a voltage sensor and a lightning arrester, the upper cabinet door and the lower cabinet door are hinged to the switch On the front side of the cabinet, the circuit breaker is fixed on the left side of the switch cabinet, the current transformer, the voltage sensor and the arrester are fixed on the right side of the switch cabinet, the circuit breaker, The current transformer, the voltage sensor and the arrester are connected through copper bars.

A load switch switchgear, including a load switch, and also includes a switch cabinet body, an upper cabinet door, a lower cabinet door, a current transformer, a voltage sensor and a lightning arrester, the upper cabinet door and the lower cabinet door are hinged to the switch On the front side of the cabinet, the load switch is fixed on the left side of the switch cabinet, the current transformer, the voltage sensor and the arrester are fixed on the right side of the switch cabinet, the load switch, The current transformer, the voltage sensor and the arrester are connected through copper bars.

A combined electrical switchgear, including a combined electrical appliance, and also includes a switch cabinet body, an upper cabinet door, a lower cabinet door, a current transformer, a voltage sensor and a lightning arrester, the upper cabinet door and the lower cabinet door are hinged to the switch On the front side of the cabinet, the load switch is fixed on the left side of the switch cabinet, the current transformer, the voltage sensor and the arrester are fixed on the right side of the switch cabinet, the load switch, The current transformer, the voltage sensor and the arrester are connected through copper bars.

As the same switch cabinet structure of the above three switch cabinets, the height of the switch cabinet is 1800mm, the width of the switch cabinet is 500mm, and the depth of the switch cabinet is 900mm; the switch cabinet is divided into a cable room, A busbar room and an instrument room, a metal partition is arranged between the cable room and the busbar room, and a high instrument box is detachably arranged above the instrument room, and a high instrument box is installed between the high instrument box and the instrument room A threading slot is provided. The top of the switch cabinet body is provided with a metal heat dissipation plate.

Compared with the prior art, the utility model has the advantages of:

1. The integrated design of switch mechanism (including circuit breaker, load switch and combined electrical appliances) + isolating switch + grounding switch simplifies the installation steps of the switch, and the mechanical characteristics test can still be carried out after the switch mechanism is installed in the switch cabinet. The overall design of the three switchgears (including circuit breaker switchgear, load switch switchgear and combined electrical switchgear) highlights the advantages of environmental protection, economy, simplicity, convenience, etc., and is easy to be intelligent, primary and secondary integration development, in line with the requirements of power distribution switches Development trend, with strong market competitiveness.

2. The switch cabinet has the characteristics of miniaturization and integration, and its size is controlled at 500x900x1800mm to meet the special requirements of customers. In addition, the busbar room compartment adopts metal partitions to meet the requirements of PM compartments; the distance between the charged body and the ground is greater than 125mm, and when the isolation switch is in the open state, the distance between the isolation blade and the ground is still greater than 125mm, which meets the safety requirements. The detachable setting of the high meter box is convenient for transportation and installation, and is also conducive to heat dissipation, meeting the temperature rise test requirements; the metal heat dissipation plate is used to improve the heat dissipation performance of the switch cabinet body, and meets the temperature rise test requirements.

3. The isolation blade of the four-blade structure has greater flow capacity and increases the heat dissipation area; and the setting of multiple contact springs makes the pressure between the two blades greater; the arc-shaped protrusion The setting of the blade is changed from the original line contact method to the point contact method, which makes the contact more reliable; and the design of the deformation groove makes the blade deform to a certain extent, so that the arc-shaped protrusions on both sides can be in place. The above several aspects can greatly reduce the heat generated by the isolation blade, so that it can meet the temperature rise test requirements.

4. Power transmission operation sequence: close the cabinet door - separate the grounding switch - close the isolation switch - close the arc extinguishing chamber (including the circuit breaker arc extinguishing chamber and the load switch arc extinguishing chamber); power failure maintenance operation sequence: separate arc extinguishing Room—separate isolating switch—close the grounding switch—open the cabinet door; the interlock mechanism of this scheme can ensure that the equipment can only be operated in the above two sequences, meeting the "five defenses" interlock requirements.

5. Under the premise of satisfying the specific requirements of safety, the insulating cylinder reduces the volume as much as possible; the design of the integrated insulating cylinder enables the overall installation of the arc extinguishing chamber and the isolating switch, making the structure more compact. At the same time, through the setting of the extension section, the concrete between the arc extinguishing chamber and the isolating switch can be increased to ensure its safety; the design of the arch section is convenient for the installation of the isolating switch, and the opening and closing action can be performed in a limited space. The setting of the first shed and the second shed can increase the creepage distance. Because the hinged hole of the cylinder is connected with the insulating arm, it will receive a great impact when the interrupter is opened and closed, so the cylinder insert is set to ensure the strength of the hinge hole of the cylinder; and the setting of the reinforcing rod increases the cylinder insert The contact area with the insulating cylinder makes the cylinder insert more firmly fixed in the insulating cylinder.

6. The broken line structure of the insulating arm enables its front end to extend into the insulating cylinder, so that the insulating arm can be opened and closed in a limited space; the hinged holes at both ends of the insulating arm are in the opening and closing It will be subject to a great impact, so the arm insert is set to ensure the strength of the hinge hole of the arm; the flower piece is equivalent to the skeleton of the hinge part of the insulating arm, which can greatly increase the bearing capacity of the insulating arm and ensure its strength. ;The setting of the arm shed can guarantee to meet the requirements of the creepage distance; the setting of the limit ring and the chute can increase the contact area with the insulating arm, making it more secure to fix; The impact force of the crank arm is greater, so the hinged hole of the crank arm is designed to be less, so that the bottom of the hinged hole of the crank arm is thicker, and the bearing capacity of the crank arm is increased as much as possible under the condition that the size of the insulating crank arm is limited.

Description of drawings

Fig. 1 is a three-dimensional structural schematic diagram of a circuit breaker switch cabinet according to a preferred embodiment of the present invention;

Fig. 2 is a rear view of a circuit breaker switch cabinet according to a preferred embodiment of the present invention;

Fig. 3 is a side view of a circuit breaker switchgear according to a preferred embodiment of the present invention;

Fig. 4 is a schematic diagram of a three-dimensional structure of a switch cabinet according to a preferred embodiment of the present invention;

Fig. 5 and Fig. 6 are three-dimensional schematic diagrams of the circuit breaker according to a preferred embodiment of the present invention; wherein Fig. 6 also shows a side view of the grounding switch of the circuit breaker;

Fig. 7 and Fig. 8 are three-dimensional structural diagrams of load switches according to a preferred embodiment of the present invention; wherein Fig. 8 also shows a side view of the load switch grounding switch;

Fig. 9 and Fig. 10 are the three-dimensional structural schematic diagrams of the combined electric appliance according to a preferred embodiment of the present invention; wherein Fig. 10 also shows a side view of the grounding switch of the combined electric appliance;

Fig. 11 is a schematic diagram of the three-dimensional structure of the isolation blade according to a preferred embodiment of the present invention;

Fig. 12 is an enlarged view of the end of the isolation blade according to a preferred embodiment of the present invention;

Fig. 13 is an exploded view of the isolation blade according to a preferred embodiment of the present invention;

Fig. 14 is a front view of a knife plate according to a preferred embodiment of the present invention;

Fig. 15 is a schematic perspective view of the three-dimensional structure of the insulating crank arm according to a preferred embodiment of the present invention;

Fig. 16 is a schematic diagram of the internal structure of the insulating arm according to a preferred embodiment of the present invention;

Fig. 17 is a schematic diagram of a three-dimensional structure of a flower piece according to a preferred embodiment of the present invention;

Fig. 18 is a schematic perspective view of the three-dimensional structure of the crank arm insert in a preferred embodiment of the present invention;

Fig. 19 is a schematic perspective view of the three-dimensional structure of the insulating cylinder according to a preferred embodiment of the present invention;

Fig. 20 is a schematic perspective view of the three-dimensional structure of the cylinder insert in a preferred embodiment of the present invention;

Fig. 21 is a front view of an insulating cylinder according to a preferred embodiment of the present invention;

Fig. 22 is a cross-sectional view along the A-A direction in Fig. 21 according to a preferred embodiment of the present utility model;

23 to 27 are schematic diagrams of the state changes of the interlock mechanism in the power transmission operation sequence according to a preferred embodiment of the present invention.

Detailed ways

The following description is used to disclose the utility model so that those skilled in the art can realize the utility model. The preferred embodiments described below are only examples, and those skilled in the art can devise other obvious variations.

In the description of the present utility model, it should be noted that for orientation words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "upper", "lower ", "Front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Inverse "Hour hand" and other indication orientations and positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, so as to The specific orientation structure and operation should not be interpreted as limiting the specific protection scope of the present utility model.

As shown in Figures 1 to 6 and Figures 11 to 27, it is a schematic structural diagram of a circuit breaker switch cabinet in a preferred embodiment of the present invention; as shown in Figure 4, Figure 7, Figure 8 and Figures 11 to 27, the utility model A schematic structural diagram of a load switch switch cabinet in a preferred embodiment of the new model; as shown in Figure 4 and Figures 10 to 27, a schematic structural diagram of a combined electrical switch cabinet in a preferred embodiment of the present invention. Since the basic structure of the circuit breaker 100, the load switch 200 and the combined electrical appliance 300 are the same, this embodiment will describe the structure of the circuit breaker switchgear in detail, and the difference between the load switch switchgear, the combined electrical switchgear and the circuit breaker switchgear Described here, the similarities of the three will not be described again.

As shown in Figures 1 to 3, the circuit breaker switch cabinet includes a circuit breaker 100, a switch cabinet body 400, an upper cabinet door 500, a lower cabinet door 600, a current transformer 700, a voltage sensor 800 and a lightning arrester 900, the upper cabinet door 500 and the lower cabinet door The cabinet door 600 is hinged on the front side of the switch cabinet body 400, the circuit breaker 100 is fixedly arranged on the left side of the switch cabinet body 400, the current transformer 700, the voltage sensor 800 and the lightning arrester 900 are fixedly arranged on the right side of the switch cabinet body 400, the circuit breaker 100, The current transformer 700, the voltage sensor 800 and the arrester 900 are connected through copper bars. The above structure and installation position make the structure of the switchgear more compact to meet the size requirements.

It is worth mentioning that the above switchgear structure is also suitable for installing the load switch 200 and the combination device 300, and the installation position and installation method of the load switch 200 and the combination device 300 are the same as the circuit breaker 100, and the circuit breaker 100 can be directly replaced. Although this embodiment only shows the specific structure of the circuit breaker switch cabinet, this does not hinder the full disclosure of the structures of the load switch switch cabinet and the combined electrical switch cabinet.

As shown in Figure 4, the height of the switch cabinet 400 is 1800 mm, the width of the switch cabinet 400 is 500 mm, and the depth of the switch cabinet 400 is 900 mm; the switch cabinet 400 is divided into a cable room 401, a bus room 402 and an instrument room 403, and A metal partition 405 is set between 401 and the busbar room 402 , and a detachable high instrument box 404 is set above the instrument room 403 , and a threading groove 4041 is opened between the high instrument box 404 and the instrument room 403 . A metal heat dissipation plate 406 is arranged on the top of the switch cabinet body 400 .

As shown in Figures 5 and 6, the circuit breaker 100 of this embodiment includes a chassis 1, a circuit breaker arc extinguishing chamber 2, an isolating switch 3, a circuit breaker grounding switch 4, an operating mechanism 5, an interlock mechanism 6, and an insulating cylinder 7 And insulating arm 8. specific:

Underframe 1 is used to support and install circuit breaker arc extinguishing chamber 2, isolating switch 3, circuit breaker grounding switch 4, operating mechanism 5, interlock mechanism 6, insulating cylinder 7 and insulating arm 8, and underframe 1 is also used for fixing Installed on the switch cabinet body 400.

The operating mechanism 5 drives the arc extinguishing chamber 2 of the circuit breaker, the isolating switch 3 and the grounding switch 4 of the circuit breaker to switch on and off.

The circuit breaker arc extinguishing chamber 2 can break load current and short-circuit current.

The circuit breaker grounding switch 4 is used to switch the grounding wire; the circuit breaker grounding switch 4 includes a first grounding contact 41, a first grounding knife 42, a first rotating shaft 43, a first pull plate 44 and a first tension spring 45; The grounding contact 41 is fixedly arranged on the lower end of the arc extinguishing chamber 2 of the circuit breaker, the first grounding knife 42 is fixedly arranged on the first rotating shaft 43, the first rotating shaft 43 is rotatably arranged on the bottom frame 1, and the first pull plate 44 is fixedly arranged on the second On a rotating shaft 43, the first tension spring 45 is arranged between the first tension plate 44 and the chassis 1; the first ground contact 41 is a columnar contact, the first ground knife 42 is a double-knife plate structure, and the first tension spring 45 is two, and they are respectively arranged at the two ends of the first pull plate 44 . Two of the first extension springs 45 can increase the operating work of the grounding switch, making the opening and closing more rapid and reliable.

As shown in Figures 11 to 14, the isolating switch 3 is used to isolate the power supply; the isolating switch 3 includes three groups of isolating blades 31, the isolating blades 31 are four-blade structures, and each group of isolating blades 31 includes a blade 311, a pressing Tightening bolt 312, compression nut 313, contact spring 314 and spacer sleeve 315, four blades 311, two groups of compression bolts 312 and compression nuts 313, compression bolts 312 pass through both ends of four blades , and fixed by the compression nut 313, the knife plate 311 can slide on the compression bolt 312, the contact spring 314 is arranged between the inner two knife plates 311, and the contact spring 314 is sleeved on the compression bolt 312, The contact spring 315 forces the inner two knife plates 311 to slide outward, and a spacer sleeve 315 is arranged between the inner knife plate 311 and the outer knife plate 311. The spacer sleeve 315 is sleeved on the compression bolt 312. The minimum distance between the inner blade 311 and the outer blade 311. Wherein, the front end of the knife plate 311 is provided with a deformation groove 3112, and the inner side of the front end of the knife plate 311 is provided with an arc-shaped protrusion 3111, and there are two arc-shaped protrusions 3111, which are located on both sides of the deformation groove 3112. Between the knife plate 311 and the compression bolt 312, and between the knife plate 311 and the compression nut 313, a contact spring 314 is also arranged, and the contact springs 314 on both sides force the two knife plates 311 on the outside to slide inwardly; A washer 316 is provided between the side blade 311 and the contact spring 314 .

As shown in Figures 23 to 27, the interlock mechanism 6 is combined with the operating mechanism 5 to limit the operation sequence of the circuit breaker arc extinguishing chamber 2, the disconnector 3, the circuit breaker grounding switch 4 and the lower cabinet door 600; There are grounding operation hole 6a and isolation operation hole 6b. The grounding operation hole 6a can pass through the operating handle and is used for opening and closing the grounding switch 4 of the circuit breaker (also suitable for opening and closing the grounding switch 4' of the load switch and the grounding switch 4" of the combined electrical appliance. same), the isolation operation hole 6b can pass through the operating handle for opening and closing the isolation switch 3; the interlocking mechanism 6 includes a lower door interlocking plate 61, an interlocking top plate 62, a grounding interlocking plate 63, an intermediate interlocking plate 64 and Isolate the interlocking plate 65; the lower door interlocking plate 61 is fixedly arranged on the lower cabinet door 600, the lower door interlocking plate 61 is provided with a lock hole 611 along the vertical direction, the interlocking top plate 62 is in the shape of 7, and the interlocking top plate 62 is hinged on the operating mechanism 5 along the internal and external directions, and the two ends of the interlocking top plate 62 can respectively resist the lower door interlocking plate 61 and the grounding interlocking plate 63, and the grounding interlocking plate 63 is slidably arranged on the operating mechanism 5 along the vertical direction. The grounding interlock plate 63 extends inwardly with a contact protrusion 631, the upper end of the interlock top plate 62 can touch the contact protrusion 631, and a lock cylinder 632 is arranged below the contact protrusion 631, and the lock cylinder 632 can enter and exit the lock hole 611, and the ground interlock plate 63 and the operating mechanism 5 are provided with a ground interlock extension spring 633, the ground interlock extension spring 633 forces the ground interlock plate 63 to slide upward, and the middle interlock plate 64 is slid on the operating mechanism 5 along the vertical direction. An intermediate interlocking extension spring 641 is arranged between the locking plate 64 and the operating mechanism 5 , and the intermediate interlocking extension spring 641 forces the intermediate interlocking plate 64 to slide upwards, and the isolation interlocking plate 65 is vertically slid on the operating mechanism 5 . Wherein, the two ends of the interlocking top plate are provided with contact discs 621, which make the collision smoother and prevent wear and stagnation.

The working process of the interlock mechanism is as follows: when the lower cabinet door is opened, the circuit breaker arc extinguishing chamber (also suitable for load switch arc extinguishing chamber 2', the same below) and the isolating switch are in the opening state, and the circuit breaker grounding switch is in the closing state , the grounding interlocking plate, under the action of the interlocking tension spring, is at the uppermost end and blocks the grounding operation hole, restricting the operation of the grounding switch of the circuit breaker; when the lower cabinet door is closed, the lower door interlocking plate interferes with the lower end of the interlocking top plate, The lock top plate is overturned, and the top of the interlock top plate is in contact with the contact protrusion, so that the ground interlock plate slides downward, the lock column enters the lock hole, and the ground operation hole is opened. At this time, the opening operation of the ground switch of the circuit breaker can be performed; When the switch is opened, the operating mechanism drives the middle interlocking plate to slide down until the grounding operation hole and the isolation operation hole are in the open state, at which point the isolating switch can be closed; The interlocking plate slides down until the middle interlocking plate blocks the grounding operation hole, restricting the operation of the grounding operation hole. At this time, the closing operation of the arc extinguishing chamber of the circuit breaker can be performed; Drive the isolation interlock plate to slide upward until the isolation interlock plate blocks the isolation operation hole and restricts the operation of the isolation switch.

As shown in Figures 19 to 22, the insulating cylinder 7 is used for insulation protection, and for installing the circuit breaker arc extinguishing chamber 2 and the disconnector 3; the insulating cylinder 7 includes a cylinder body 71, an extension section 72 and an arch section 73, the cylinder body 71 is used to install the interrupter 2 of the circuit breaker, the extension section 72 is arranged above the cylinder 71, and the arch section 73 is arranged above the extension section 72. The isolating switch 3 passes through; the lower end of the insulating cylinder 7 is provided with a cylinder hinge hole 74, the insulating arm 8 is hinged in the cylinder hinge hole 74, and a cylinder insert 75 is arranged in the cylinder hinge hole 74, and the cylinder insert 75 is diametrically A reinforcing rod 751 extends outward. Among them, the extension section 72 is provided with a first shed 721, the first shed 721 is connected to the shed of the cylinder 71, the second shed 731 is provided on both sides of the arch section 73; rise.

As shown in Fig. 15 to Fig. 18, the insulating crutches 8 are used to connect the interrupter chamber 2 of the circuit breaker and the operating mechanism 5. The middle section of the crank arm 8 is provided with a mounting hole 82, and the insulating crank arm 8 is hinged in the cylinder hinge hole 74 by passing through the rotating shaft in the mounting hole 82. The upper cover is provided with flower pieces 84 . Wherein, a crank shed 85 is arranged between the hinge hinge hole 81 and the installation hole 82 at both ends; a limit ring 831 is arranged on the outside of the crank insert 83, and a flower groove 841 is opened on the inside of the flower piece 84; 81 offset upwards.

As shown in Fig. 7 and Fig. 8, it shows the structure of load switch 200 from different angles of view, and the similarities between load switch 200 and circuit breaker 100 will not be described repeatedly. The arc extinguishing chamber 2', and the biggest difference between the load switch arc extinguishing chamber 2' and the circuit breaker arc extinguishing chamber 2 is that the load switch arc extinguishing chamber 2' can only break the load current, and the price of the load switch arc extinguishing chamber 2' Far lower than the price of circuit breaker interrupter 2, it can meet the needs of different customers. In addition, the load switch 200 and the circuit breaker 100 are also different in the grounding switch, and the load switch 200 adopts the load switch grounding switch 4'. Specifically, the load switch grounding switch 4' is used to turn on and off the grounding wire; the load switch grounding switch 4' includes a second grounding contact 41', a second grounding knife 42', a second rotating shaft 43', and a second pull plate 44' and the second tension spring 45'; the second grounding contact 41' is fixedly arranged at the lower end of the load switch arc extinguishing chamber 2', the second grounding knife 42' is fixedly arranged on the second rotating shaft 43', and the second rotating shaft 43' is rotated On the base frame 1, the second pull plate 44' is fixedly arranged on the second rotating shaft 43', and the second tension spring 45' is arranged between the second pull plate 44' and the base frame 1; the second ground contact 41' It is a claw structure, and the second ground blade 42' is a single blade structure. The load switch grounding switch 4' has the advantages of simple structure and low cost, and is suitable as the grounding switch of the load switch 200. On the contrary, the circuit breaker grounding switch 4 has the advantages of reliable contact and firm structure, but is relatively expensive, and is suitable for application in the circuit breaker 100 to meet the needs of different customers.

As shown in FIG. 9 and FIG. 10 , it shows the structure of a combined electrical appliance 300 from different perspectives. The combined electrical appliance 300 is based on the load switch 200 with a fuse 9 added. Specifically, the fuse 9 is used to break the short-circuit current; the fuse 9 includes a mounting base 91, an insulator 92 and a fuse 93, the upper end of the mounting base 91 is fixedly arranged at the lower end of the load switch arc extinguishing chamber 2', and the lower end of the mounting base 91 passes through the insulator 92 is fixedly arranged on the base frame 1 , and the melting core 93 is clamped on the mounting base 91 .

Due to the limitation of the position of the fuse 9 , it is necessary to carry out structural modification to the grounding switch of the combined electric device 300 , so that it can utilize the space to the maximum extent and reduce the volume of the combined electric device 300 . Therefore combined electric appliance grounding switch 4 " comprises the 3rd grounding contact 41 ", the 3rd grounding blade 42 ", the 3rd rotating shaft 43 ", the 3rd pulling plate 44 " and the 3rd extension spring 45 "; The 3rd grounding contact 41 " It is fixedly arranged on the lower end of the mounting base 91, the third grounding knife 42" is fixedly arranged on the third rotating shaft 43", the third rotating shaft 43" is rotatably arranged on the chassis 1, and the third pull plate 44" is fixedly arranged on the third rotating shaft 43 ", the third tension spring 45" is set between the third pull plate 44" and the chassis 1; the third ground contact 41" is a claw structure, the third ground blade 42" is a single blade structure, and the third ground The connecting knife 42" is inserted into the third ground contact 41" from top to bottom.

The switchgear of the above three structures can be selected according to the needs.

The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the industry should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions describe only the principle of the utility model. There will be various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The protection scope required by the utility model is defined by the appended claims and their equivalents.

Claims (2)

1. a kind of interlocking mechanism of integral switch mechanism, it is characterised in that: interlocking mechanism's binding operation mechanism, for limiting Arc-chutes processed, disconnecting switch, the operation order of earthing switch and lower cabinet door；Be provided on the operating mechanism ground connection handle hole and Isolated operation hole, the ground connection handle hole may pass through operation handle, and for earthing switch described in division, the isolated operation hole can Across operation handle, for disconnecting switch described in division；The interlocking mechanism includes Xiamen interlock plate, interlocking top plate, ground connection connection Jam plate, intermediate interlock plate and isolation interlock plate；The Xiamen interlock plate is fixedly installed on lower cabinet door, on the Xiamen interlock plate Lockhole is offered along the vertical direction, and the interlocking top plate is in 7 fonts, and the interlocking top plate is articulated with the operation along inward-outward direction In mechanism, the interlocking top plate both ends can contradict Xiamen interlock plate and the ground connection interlock plate, the ground connection interlock plate edge respectively Vertical direction is slideably positioned on the operating mechanism, and the ground connection interlock plate extends inwardly contact projection, the interlocking top Plate upper end can contradict the contact projection, be provided with lock pillar below the contact projection, the lock pillar can pass in and out the lockhole, institute It states and is provided with ground connection interlocking tension spring between ground connection interlock plate and the operating mechanism, the ground connection interlocking tension spring forces the ground connection Interlock plate upward sliding, the intermediate interlock plate are slideably positioned in along the vertical direction on the operating mechanism, the intermediate interlocking Intermediate interlocking tension spring is provided between plate and the operating mechanism, the intermediate interlocking tension spring forces the intermediate interlock plate upward Sliding, the isolation interlock plate are slideably positioned in along the vertical direction on the operating mechanism；

When the lower cabinet door is opened, the arc-chutes and the disconnecting switch are in gate-dividing state, and the earthing switch, which is in, to be closed Lock state, the ground connection interlock plate in the top and block the ground connection handle hole under the action of interlocking tension spring, limit System operates the earthing switch；When the lower cabinet door is closed, the Xiamen interlock plate contradicts the interlocking top plate lower end, The interlocking top plate is flipped, and the interlocking top plate upper end contradicts the contact projection, makes the ground connection interlock plate to downslide Dynamic, the lock pillar enters the lockhole, and the ground connection handle hole is opened, and can carry out the sub-switching operation of the earthing switch at this time； The grounding switch tripping drives the intermediate interlock plate slide downward by the operating mechanism, until the ground connection operates Hole and the isolated operation hole are in opening state, can carry out the closing operation of the disconnecting switch at this time；It is described to keep apart Close lock, the intermediate interlock plate slide downward driven by the operating mechanism, until the intermediate interlock plate block it is described It is grounded handle hole, limitation operates the ground connection handle hole, can carry out the closing operation of the arc-chutes at this time；It is described to go out Arc chamber closes a floodgate, and the isolation interlock plate upward sliding is driven by the operating mechanism, until the isolation interlock plate blocks institute Isolated operation hole is stated, limitation operates the disconnecting switch.

2. a kind of interlocking mechanism of integral switch mechanism according to claim 1, it is characterised in that: the interlocking top plate Both ends are provided with contact disk.