CN104332345A - Ultra high speed mechanical switch, switch fracture thereof and switch contacts thereof - Google Patents

Abstract

The invention provides an ultra-high-speed mechanical switch and its switch fracture and its switch contact. The operating mechanism, the first and second switch contacts are provided with conductive metal pieces at intervals along the moving direction in sequence, every two adjacent conductive metal pieces are insulated, the conductive metal piece has a bridging length, and the bridging length makes Satisfied: When in the closing position, the conductive metal piece on the first switch contact bridges in turn the two adjacent conductive metal pieces on the second switch contact that is matched with it and realizes the first and second switch contacts. conduction; at the opening position, at least one end of the conductive metal piece on the first switch contact is located at the interval between two adjacent conductive metal pieces on the second switch contact that is adapted to it and realizes the second switch contact. 1. The opening and closing of the second switch contact. The opening and closing time of the ultra-high-speed mechanical switch of the present invention is relatively short, and can meet the use requirements.

Description

An ultra-high-speed mechanical switch, its switch fracture and its switch contact

technical field

The invention relates to the field of high-voltage direct current transmission equipment, in particular to an ultra-high-speed mechanical switch, a switch fracture and a switch contact.

Background technique

Multi-terminal DC transmission based on flexible DC transmission technology has been increasingly used in Europe, North America, China and other countries and regions. Although several multi-terminal DC transmission systems have been put into operation in the world, due to the lack of DC circuit breakers. The reliability, flexibility, and continuity of multi-terminal HVDC transmission are greatly restricted, which poses serious obstacles to its popularization and application, and also has a great impact on the construction of future DC grids. The lack of high-voltage DC circuit breakers has become a bottleneck problem affecting the construction of future DC power grids in the world, and its development is imminent.

At present, when the flexible DC and multi-terminal DC transmission systems fail, a large short-circuit current will be generated, and the fault current rises very quickly, requiring DC circuit breakers to complete breaking in a very short time. Assuming that the voltage level is 320kV, the current rising speed of the DC side is 3.5kA/ms, assuming that the current value on the normal operating line is 2kA, the short-circuit current on the line can reach 9kA after 2ms, that is, a high-voltage DC circuit breaker that can start 9kA current must be in Quickly act within 2ms to cut off the current. Existing vacuum interrupters of circuit breakers can only achieve a level below 126kV. If it is to meet a level above 200kV, multiple vacuum interrupters must be connected in series to achieve the purpose of breaking. In this way, multiple vacuum interrupters in series can be controlled At the beginning of the synchronization rate, it has higher requirements. Only sulfur hexafluoride arc extinguishing chambers can meet the conditions for single-break circuit breakers above 200kV with mature technology, and sulfur hexafluoride arc extinguishing chambers also have the problems of long travel and long breaking time. At present, conventional hexafluoride The stroke of the sulfur circuit breaker is more than 200 millimeters, and the opening and closing time is tens of milliseconds, which is far below the opening and closing time requirements of the ultra-high-speed switch.

Contents of the invention

The object of the present invention is to provide an ultra-high-speed mechanical switch with short opening and closing time; at the same time, the present invention also provides a switch fracture suitable for the ultra-high-speed mechanical switch; Switch contacts for high-speed switches.

The ultra-high-speed mechanical switch of the present invention adopts the following technical solutions:

An ultra-high-speed mechanical switch, comprising an insulating casing, a switch opening is provided inside the insulating casing, the switching opening includes a first switch contact and a second switch contact, and a switch for driving the second switch contact is arranged inside the insulating casing. 1. The opening and closing operating mechanism of the second switch contact, the first and second switch contacts are in the closing position when closing, and the first and second switch contacts are in the opening position when opening , the first and second switch contacts are sequentially provided with conductive metal pieces at intervals along the moving direction, and the space between every two adjacent conductive metal pieces is insulated, and the conductive metal piece has a bridging length, and the bridging The length satisfies two conditions: first, when in the closing position, the conductive metal piece on the first switch contact bridges the adjacent two conductive metal pieces on the second switch contact that is matched with it in turn and realizes the second switch contact. 1. Conduction of the second switch contact; second, at the opening position, at least one end of the conductive metal piece on the first switch contact is located on two adjacent conductive metal parts on the second switch contact that is adapted to it. The spaced position between the metal parts realizes the breaking of the first and second switch contacts.

The conductive metal parts on the first and second switch contacts are insulated and separated in turn by insulating connectors. Insert the head and move relative to the axial direction of the contact to realize the opening and closing socket.

The conductive metal parts and the insulating connecting parts on the first and second switch contacts are all round tubes, and the structures of the conductive metal parts on the first switch contact and the second switch contact are the same, and the first switch contact The structure is the same as that of the insulating connecting piece on the second switch contact, and the length of the conductive metal piece is greater than that of the insulating connecting piece.

The switch fracture of the present invention adopts following technical scheme:

A switch break, including a first switch contact and a second switch contact, the first and second switch contacts are relatively close to or far away from the drive of the corresponding operating mechanism to achieve closing or opening, when closing The first and second switch contacts are both in the closing position. When the switch is opened, the first and second switch contacts are both in the opening position. The first and second switch contacts are arranged with conductive metal at intervals along the movement direction. The parts are insulated at the interval positions between every two adjacent conductive metal parts, and the conductive metal parts have a bridging length, which satisfies two conditions: first, in the closing position, the first switch The conductive metal parts on the contact are sequentially connected to two adjacent conductive metal parts on the second switch contact that are adapted to it and realize the conduction of the first and second switch contacts; second, when in the opening position , at least one end of the conductive metal piece on the first switch contact is located at the spaced position between two adjacent conductive metal pieces on the second switch contact that is adapted to it and realizes the first and second switch contacts break.

The conductive metal parts on the first and second switch contacts are insulated and separated in turn by insulating connectors. Insert the head and move relative to the axial direction of the contact to realize the opening and closing socket.

The conductive metal parts and the insulating connecting parts on the first and second switch contacts are all round tubes, and the structures of the conductive metal parts on the first switch contact and the second switch contact are the same, and the first switch contact The structure is the same as that of the insulating connecting piece on the second switch contact, and the length of the conductive metal piece is greater than that of the insulating connecting piece.

The switch contact of the present invention adopts the following technical scheme:

A switch contact, including a contact body, the contact body is sequentially provided with conductive metal parts at intervals along the movement, and the space between every two adjacent conductive metal parts is insulated, and the conductive metal parts have a bridge length, the bridging length satisfies two conditions: first, in the closing position, the conductive metal piece on the contact body can bridge two adjacent conductive metal parts on the contact body that is compatible with the contact body. Metal piece; secondly, at the opening position, at least one end of the conductive metal piece on the contact body is located at a space between two adjacent conductive metal pieces on the contact body that is adapted to it.

The conductive metal parts on the contact body are successively insulated from each other through the insulating connectors, and both the conductive metal parts and the insulating connectors are tubular.

The structures of the conductive metal parts on the contact body are the same, and the structures of the insulating connectors on the contact body are the same, and the length of the conductive metal parts is greater than that of the insulating connectors.

The switch contact of the ultra-high-speed mechanical switch of the present invention is provided with conductive metal parts at intervals along the moving direction in sequence, and the space between every two adjacent conductive metal parts is insulated, and the conductive metal parts have a bridging length, and the bridging The length satisfies two conditions: first, when in the closing position, the conductive metal piece on the first switch contact bridges the adjacent two conductive metal pieces on the second switch contact that is matched with it in turn and realizes the second switch contact. 1. Conduction of the second switch contact; second, at the opening position, at least one end of the conductive metal piece on the first switch contact is located on two adjacent conductive metal parts on the second switch contact that is adapted to it. The spaced position between the metal parts realizes the breaking of the first and second switch contacts. When the switch of the present invention is in use, the two switch contacts are close to or far away from each other, and when the axial positions of the conductive metal parts on the switch contacts are staggered, the conductive metal parts on the first switch contact and the corresponding second The two adjacent conductive metal pieces on the switch contact are bridged, so that each conductive metal piece is sequentially bridged, so that a current flow circuit is formed between the two switch contacts, and the closing can be realized. When at least one end of the conductive metal piece on the contact is located at the spaced position between the two conductive metal pieces on the second switch contact, every two adjacent conductive metal pieces are insulated and separated, and no current flow loop can be formed , At this time, it is the opening. This opening and closing principle and the switch structure make the two switch contacts only need to move a very short distance, even if one end of the conductive metal part on the first switch contact leaves or touches the second switch. One end of the conductive metal piece on the contact can realize opening or closing, the opening and closing stroke is short, and the time required for opening and closing is also short.

Further, the conductive metal parts on the first and second switch contacts are insulated and separated sequentially through insulating connectors, and the conductive metal parts are connected at intervals through the insulating connectors to improve the strength of the entire contact. The surface is adapted to the insertion hole on the second switch contact, and the two contacts are coaxially matched, which improves the stability of the contact during the opening and closing movement.

Furthermore, the conductive metal parts and the insulating connecting parts of the second switch pull rod are all round tubular structures, which greatly reduces the weight of the switch contacts, and under the condition that the driving force provided by the operating mechanism is limited, the maximum improvement of the switch contacts is achieved. At the same time, the tubular structure makes the conductive contact surface of the contact a cylindrical surface, the flow area is large, and the electric field generated by the flow is relatively stable and uniform.

Description of drawings

Fig. 1 is the structural representation of the embodiment of a kind of ultra-high speed mechanical switch of the present invention;

Fig. 2 is an enlarged view of the repulsion operating mechanism I in Fig. 1;

Fig. 3 is a structural schematic diagram of the first switch pull rod in Fig. 1;

Fig. 4 is a schematic structural view of the second switch pull rod in Fig. 1;

Fig. 5 is a schematic diagram of the switch fracture in the opening position;

Fig. 6 is a schematic diagram of the break of the switch at the closing position;

Fig. 7 is a schematic diagram of the break of the switch in the opening position of the second embodiment;

Fig. 8 is a schematic diagram of the switch fracture in the closing position of the third embodiment;

Fig. 9 is a schematic diagram of the break of the switch in the opening position of the third embodiment.

Detailed ways

An embodiment of an ultra-high-speed mechanical switch of the present invention: as shown in Figures 1-6, it includes a sealed insulating cylinder 1, the inner space C of the insulating cylinder 1 is filled with high-voltage sulfur hexafluoride, and the insulating cylinder 1 Repulsion force operating mechanisms I and III with the same structure are respectively connected to the two ends of the two ends in a sealed manner at intervals. The repulsion force operating mechanisms I and III are respectively driven and connected with switch pull rods 191 and 192 extending along the axial direction of the insulating cylinder 1, and the switch pull rods 191 and The two ends of 192 that are close to each other are respectively provided with breaking contacts, and the outer peripheral wall of the insulating cylinder 1 is respectively sealed and connected with the first conductive end A and the second conductive end B, and the first conductive end A and the second conductive end B Located in the same plane passing through the axis of the insulating cylinder and respectively arranged on both sides of the insulating cylinder 1, the first conductive end A and the second conductive end B are electrically connected to the breaking contacts on the switch pull rods 191 and 192 respectively, and the repulsive force The operating mechanisms I and III respectively drive the switch pull rods 191 and 192 to move relative to each other to realize opening and closing.

The specific structure of the repulsion operating mechanism I of the embodiment of the present invention is shown in Figure 2, including a transmission rod 19 extending along the axis of the insulating cylinder, the right end of the transmission rod 19 is coaxially connected with the switch rod 191, and the transmission rod 19 is fixed There is a repulsion disk 90, the plane where the repulsion disk 90 is located is perpendicular to the transmission pull rod 19, and the left and right sides of the repulsion disk 90 are respectively oppositely provided with two insulating blocks 61,62, the insulating blocks 61,62 have the same structure, and the insulating blocks 61,62 are respectively There are grooves with opposite openings and openings facing the repulsion disk 90. The grooves on the insulating blocks 61, 62 coincide with the outer circumference of the repulsion disk 90, and the groove bottoms of the grooves are respectively fixed with a first coil 91 and a second coil 92. The outer diameters of the first and second coils 91, 92 are the same as the outer diameter of the repulsion disk 90 and coincide with the groove diameter of the groove. The first and second coils 91, 92 are all parallel to the repulsion disk 90 and located on the repulsion disk 90 On both sides of the insulating blocks 61, 62, radially extending through-holes 610 are uniformly distributed on the groove wall near the bottom of the groove, and all through-holes are located in the same circumferential surface perpendicular to the axis. The left and right sides of the transmission rod 19 The two ends pass through the first and second coils 91, 92 and insulating blocks 61, 62 respectively, and the transmission rod 19 is slidingly fitted with the first and second coils 91, 92 and insulating blocks 61, 62, and the insulating blocks 61, 62 and A sealing ring 600 for sealing is provided in the hole of the sliding fit of the transmission pull rod 19. The openings of the insulating blocks 61 and 62 are opposite and fixedly installed in the metal fixing sleeve 21. The outer peripheral surfaces of the two ends of the insulating blocks 61 and 62 are respectively There are protruding edges, and the diameters of these two protruding edges are equal to the diameter of the inner hole of the fixed sleeve 21. Between the two protruding edges of the insulating blocks 61, 62, the outer peripheral surfaces of the insulating blocks 61, 62 and the fixed There is a certain flow channel between the inner walls of the sleeve 21 for the circulation of the buffer medium. The grooves of the two insulating blocks form an insulating cavity. The right end of the fixed sleeve 21 has a cylinder bottom that stops the insulating block 61, and the opening on the left is There is an outer flange for connection, the left open end of the fixing sleeve 21 is connected with a metal fixing seat 4, the fixing seat 4 is cylindrical extending left and right, and its two ends are respectively provided with connecting flanges 41, 42, The connecting flange 41 is connected to the outer flange of the fixing sleeve 21 by screws, and the flange surface of the connecting flange 41 is pressed against the left end face of the insulating block 62, and the connecting flange 41 and the right side of the fixing sleeve 21 are connected to each other. Cooperate with the insulating blocks 61, 62 to be pressed and fixed together, the first and second coils 91, 92 and the side walls of the insulating blocks 61, 62 jointly form a buffer chamber 7, and the left and right ends of the transmission rod 19 are respectively stretched out and fixed. The flange surface of the seat 4 and the cylinder bottom of the fixed sleeve 21 are sealed and slidably matched with the flange surface and the central hole at the cylinder bottom, and the repulsion disk 90 fixed on the transmission pull rod 19 can be formed by insulating blocks 61, 62 against the buffer chamber. 7. Slip left and right to realize opening and closing. The circumferential wall of the fixed sleeve 21 is evenly provided with long strip holes 211 in the shape of a grid. It should be noted that the fixed sleeve 21 is set in a sealed and full In the space of high-pressure gas, high-pressure gas can pass through the strip The hole 211 is filled with the buffer cavity, that is, the buffer medium is high-pressure gas. At the same time, the elongated hole 211 can also make the gas in the buffer cavity 7 discharge through the through hole when the repulsion disk moves, and then be discharged into the outer sealed space of the fixed sleeve. Of course, in other embodiments, holes of other shapes or other arrangements may be provided on the wall of the fixed sleeve, or the wall of the fixed sleeve may not have holes. Exhausted gas can enter the buffer cavity from the damping hole on the side facing away from the moving direction of the repulsion disk through the flow channel. In other embodiments, other media such as hydraulic oil may also be used as the buffer medium, and in this case, the damping through hole needs to communicate with the hydraulic oil tank. The bottom of the right side of the fixed sleeve 21 is evenly provided with long holes 212 around the drive rod 19, and the bottom of the cylinder is also provided with outlet holes for the wires 101 connected to the first and second coils 91, 92 to go out. Holes 212 reduce the weight of the entire device.

The end of the connecting flange 41 of the transmission rod 19 protruding from the fixed seat 4 is provided with a top block 18, the top block 18 is perpendicular to the transmission rod 19 and symmetrically extends up and down with the transmission rod 19, and the side wall of the fixed seat 4 is provided with an opening and closing switch. The holding structure 5 directly fixes the opening and closing holding mechanism on the fixing base to make the structure simpler. Of course, in other embodiments, the opening and closing holding mechanism can also be fixed on other fixing parts. The opening and closing holding mechanism 5 includes two spacer sleeves 50 symmetrically arranged on the side wall of the fixed seat 4 up and down. The opening end of the tube 50 is flush with the inner wall of the cylindrical fixing seat 4, and the two limit sleeves 50 are respectively fitted with limit springs 51, and the outer circumference of the limit spring 51 matches the inner hole of the limit sleeve 50. Avoiding the radial offset of the limit spring in the sleeve, the limit sleeve 50 is also slidably equipped with a slide block 52, the limit spring is located between the slide block 52 and the bottom of the limit sleeve 50, and the two slide blocks One end face of 52 presses against one end of limit spring 51, and the other end is hinged with the upper and lower ends of top block 18 respectively through connecting block 17, and two slide blocks 52 up and down respectively slide up and down and squeeze when transmission rod 19 moves horizontally. Press and loosen the limit springs 51 in the upper and lower limit sleeves 50, the bottom of the limit sleeve 50 is also equipped with an adjusting bolt 53, and the adjusting bolt 53 is threadedly matched with the threaded hole at the bottom of the adjusting sleeve 50 to adjust The end that bolt 53 stretches into the bottom of the tube is connected with regulating platen 54, and the end of regulating platen 54 presses on the limit spring 51, adjusts the length that adjusting bolt 53 stretches into the bottom of the tube and can realize the regulation to limit spring 51 length.

The flange surface of the connecting flange 41 of the fixed seat 4 is provided with a first stop block 122 on the side where the transmission pull rod 19 protrudes. side and is located on the right side of the top block 18, the upper and lower two first stop blocks 122 correspond to the upper and lower ends of the top block 18 respectively, and the first stop blocks 122 are used to limit the stop top when the transmission rod 19 moves to the right. The farthest position where the block 18 moves to the right is the closing stroke; the center of the inner hole of the fixed seat 4 is also provided with a second stop block 121, and the second stop block 121 is located on the left side of the top block 18. When 19 moves to the left, the second stop block 121 is used to block the farthest distance that the limit jack block 18 moves to the left, that is, the opening stroke. The connecting flange 42 of the fixing seat 4 is connected with a metal cover plate 3, and the cover plate 3 is connected with a terminal 110 by screws. The terminal 110 is injection-molded with a wire 100 connected to the pulse power supply 10, and the pulse power supply 10 is fixed on the wiring terminal 110. On the left side of the terminal 110, setting the pulse power supply 10 at one end of the metal fixing base 4 is beneficial to reduce the line inductance, improve the power conversion efficiency, and make the whole structure more compact at the same time. Of course, in other embodiments, considering other Practical factors can properly adjust the installation position of the pulse power supply. The lead wire 100 is directly connected to the two first and second coils 91 and 92, so that the energized circuit can be made the shortest, and the resistance and inductance caused by the lead wire being too long will not affect the pulse current.

The switch fracture II of the embodiment of the ultra-high-speed mechanical switch of the present invention includes a first switch pull rod 191 and a second switch pull rod 192, the structure of the first switch pull rod 191 is shown in Figure 3, and includes a transmission rod for connecting with the repulsion force operating mechanism I Connecting part 1911, the connecting part 1911 is coaxially connected with insulating connecting rod 1912, the switch contact is connected to the two insulating connecting rods 1912, the switching contact is coaxially connected with the insulating connecting rod 1912, and the switching contact is made of five sections of conductive metal Tubes and four sections of insulated connecting tubes are connected at intervals in turn. The use of tubular structures greatly reduces the weight of the switch contacts. Under a certain opening and closing driving force, the opening and closing movement acceleration of the switch rod is greatly improved, and the opening and closing motion acceleration is further reduced. Closing time, of course, in other embodiments, a solid cylindrical conductive metal piece and a solid cylindrical insulating connecting piece can be used to replace the conductive metal tube and the insulating connecting tube respectively, and the switch contact on the first switch pull rod The specific number of conductive metal parts and insulating connecting parts can also be designed and selected according to needs. The diameters of the five sections of conductive metal pipes are the same, and the diameters of the four sections of insulating connecting pipes are the same. The right end is connected to other conductive metal pipes and insulating connecting pipes in turn, as shown in the connection relationship between insulating connecting pipe 1914 and conductive metal pipe 1915 in the figure; Corresponding to a switch pull rod 191, it includes a connection part 1921 for connecting with the transmission rod of the repulsion operating mechanism III. The connection part 1921 is coaxially connected with an insulating connecting rod 1922, and the two insulating connecting rods 1922 are connected with switch contacts. , the switch contact is coaxially connected with the insulating connecting rod 1922, and the switch contact is connected at intervals by four sections of conductive metal tubes and three sections of insulating connecting tubes in sequence. Similarly, in other embodiments, the switch contact on the first switch pull rod The specific number of conductive metal parts and insulating connectors can also be designed and selected according to needs. These conductive metal pipes and insulating connecting pipes on the second switch pull rod have the same shape as the conductive metal pipes and insulating connecting pipes on the first switch pull rod. The left end of insulating connecting rod 1922 is connected with the right end of conductive metal pipe 1923, and the left end of 1923 Connect other conductive metal pipes and insulated connecting pipes in turn, as shown in the connection relationship of 1924, 1925 and 1926 in the figure; wherein the inner diameter of the metal conductive pipe on the second switch pull rod 192 is just equal to the outer diameter of the metal conductive pipe on the first switch pull rod 191 diameter, the switch contacts on the first switch pull rod 191 can just fit into the switch contacts of the second switch pull rod 192 .

In the embodiment of the present invention, the conductive metal tube 1913 on the first switch pull rod 191 is conductively connected to the pull rod connection seat 4a of the first conductive end A, and the pull rod connection seat 4a has a connecting sleeve extending along the axial direction of the switch pull rod and a vertically arranged At the connecting port in the middle of the connecting sleeve, the two ends of the connecting sleeve are respectively provided with shielding rings 5a, and the connecting sleeve of the tie rod connecting seat 4a is set on the outer periphery of the conductive metal tube 1913 on the first switch pull rod 191 and matched, and the tie rod is connected The connection port of the seat 4a is electrically connected to a conductive tube 3a through a spring contact, and the other end of the conductive tube 3a is electrically connected to the electrical connection 2a fixed in the middle of the insulating basin 1a through a spring contact. Similarly, the second switch pull rod The conductive metal tube 1923 on the 192 is conductively connected with the tie rod connection seat 4b of the second conductive end B. The tie rod connection seat 4b also has a connecting sleeve extending along the axis of the switch pull rod and a connecting port vertically arranged in the middle of the connecting sleeve. Shielding rings 5b are provided at both ends of the bushing, and the connecting bushing of the tie rod connecting seat 4b is set on the outer periphery of the conductive metal tube 1923 on the second switch pull rod 192 and fitted together, and the connecting port of the tie rod connecting seat 4b is guided by a spring contact. A conductive tube 3b is connected, and the other end of the conductive tube 3b is electrically connected to the electrical connection 2b fixed in the middle of the insulating basin 1b through a spring contact.

The principle of opening and closing of the ultra-high-speed switch embodiment of the present invention is as follows: the first switch pull rod 191 and the second switch pull rod 192 approach or move away from each other under the drive of the repulsive force operating mechanism, and the first switch pull rod 191 and the second switch pull rod 191 and the second switch pull rod The conductive metal piece on the switch contact on the 192 has two kinds of positional relationships, the first one: the conductive metal piece on the switch contact on the first switch pull rod 191 moves axially to the switch on the second switch pull rod 192 When the axial positions of the insulating connectors on the contacts are the same, the conductive metal parts on the first switch pull rod 191 successively bridge the conductive metal parts of the switch contacts on the second switch pull rod 192, as shown in Figure 6, 1913, 1926 , 1915, 1924 until 1923 are sequentially connected, at this time, the first switch pull rod 191 and the second switch pull rod 192 form a conductive path, and the current can be conducted from the first conductive end A to the second conductive end B, that is, the switch is closed; The second type: when the conductive metal piece on the switch contact on the first switch pull rod 191 moves to the same axial position as the conductive metal piece on the switch contact on the second switch pull rod 192, the first switch pull rod 191 and The conductive metal parts and insulating connectors on the second switch pull rod 192 have the same axial position and are spaced sequentially. As shown in FIG. At this time, a conductive current loop cannot be formed between the first switch pull rod 191 and the second switch pull rod 192, that is, the switch is opened. It should be noted that during the movement stroke of the first switch pull rod 191 and the second switch pull rod 192, The conductive metal part 1913 of the first switch pull rod 191 is always conductively connected with the pull rod connection seat 4a of the first conductive end A, and the conductive metal part 1923 on the second switch pull rod 192 is always conductively connected with the pull rod connection seat 4b of the second conductive end B .

The working process of the repulsive force operating mechanism in the embodiment of the present invention is as follows: when the gate is opened, the transmission rod 19 is in the closing position, that is, the top block 18 on the transmission rod is located at the rightmost end of the movement stroke, and the repulsion disc is located at the end of the closed insulating cavity. At the far right end, the pulse power supply 10 energizes the first coil 91, and the repulsion disk 90 generates an induced eddy current, the induced eddy current is opposite to the current direction of the first coil 91, and a repulsive force is generated between the repulsion disk 90 and the first coil 91, so that the repulsion disk 90 drives The transmission rod 19 further drives the switch rod 191 to move to the left, wherein the movement process of the transmission rod is divided into two stages: the first stage, due to the existence of the through hole 610, at the initial stage of the movement of the repulsion disk 90, the repulsion disk 90 moves in the same direction. The high-pressure gas on the side can be discharged from the damping through hole, and the force of the high-pressure gas on the repulsion plate is small and unchanged, ensuring the high-speed opening and closing movement of the transmission rod, and will not affect the opening and closing time of the switch during use; In the second stage, the repulsion disk 90 moves to the left to the damping through hole. As the repulsion disk continues to move, the outer circumference of the repulsion disk will gradually block the damping through hole until it completely blocks the damping through hole. During this process, the damping The aperture of the through hole for high-pressure gas discharge is getting smaller and smaller, the discharge volume of high-pressure buffer gas is getting smaller and smaller, the reaction force of high-pressure gas to the repulsion disk 90 is getting bigger and bigger, and the buffer braking force to the repulsion disk is getting bigger and bigger , so that the speed of the repulsion disk gradually decreases until the top piece 18 of the transmission rod contacts the second stopper 121 and stops moving, that is, the opening process is completed. Through such gas buffering, the repulsion operating mechanism is realized in fast application. When the switch is in operation, the brake can be opened quickly, and the brake can be realized in a very short distance and time after the opening is completed, so as to avoid the collision between the repulsion disc and the first and second coils. During the entire opening process, the limit spring in the opening and closing holding mechanism is in the early stage of the movement of the repulsive disk, the top block 18 is close to the limit sleeve, the limit spring is compressed, and the top block moves leftward after the switch rod drives the top block. When the limit sleeve is used, the limit spring is extended. When the switch rod moves to the top block and the limit stopper 121 contacts, the limit spring will exert a holding force on the top block to keep the switch pull rod in the opening position; , the pulse power supply 10 energizes the second coil 92, a repulsive force is generated between the second coil 92 and the repulsive disk 90, and the movement process of the switch pull rod is reversed.

In this embodiment, the conductive metal parts of the switch contacts are sequentially connected at intervals through insulating connectors. In other embodiments, the first switch contacts can be arranged with conductive metal rings at intervals on the outer periphery of an insulating column. Similarly, The second switch contact can adopt conductive metal rings arranged at intervals in sequence on the inner wall of an insulating tube, and the outer peripheral surface of the conductive metal ring on the first switch contact coincides with the outer peripheral surface of the conductive metal ring on the second switch contact. fit, as shown in Figure 7.

In this embodiment, the lengths of the conductive metal parts of the first and second switch contacts are equal, and the lengths of the insulating connectors are also equal. In other embodiments, the length of the conductive metal parts on the first switch contact can be different. Equal to the length of the conductive metal piece on the second switch contact, the length of the insulating connector on the first switch contact may not be equal to the length of the insulating connector on the second switch contact, as long as the first switch contact The length of the conductive metal piece on the second switch contact is greater than the length of the insulating connection section on the second switch contact and the length of the conductive metal piece on the second switch contact is greater than the length of the insulating connection piece on the first switch contact, such as FIG. 8 is a schematic diagram of the mechanical switch of this embodiment when it is switched off, and FIG. 9 is a schematic diagram of the mechanical switch of this embodiment when it is switched on.

In this embodiment, both the first and second switch contacts are in the shape of a round tube. In other embodiments, the shape of the inner hole may be quadrilateral, triangular, or hexagonal.

The two sets of switch rods in the ultra-high-speed switch of the embodiment of the present invention all use a tubular structure, which not only has better centering performance during the opening and closing movement process, but also greatly reduces the overall weight of the switch rods. Relative deviation or deformation is not easy to occur in the center, which ensures the stability of opening and closing. The outer diameter of the conductive metal part of the first switch rod is just equal to the inner diameter of the conductive metal part of the second switch rod. When the switch pull rod is relatively moved to close the switch, the two ends of the first and second conductive metal parts can be in close contact through the inner and outer circumferential surfaces, which not only has better motion stability, but also increases the flow area and improves the flow capacity. the

Claims (9)

1. a kind of ultrahigh speed mechanical switch, comprise insulation shell, described insulation shell inside is provided with switch fracture, described switch fracture comprises the first switch contact and second switch contact, the operating mechanism for driving the first second switch Contact Breaking/Making Operations lock is provided with in described insulation shell, close a floodgate time first, second switch contact is all in closing position, when separating brake first, second switch contact is all in open position, it is characterized in that, first, second switch contact is interval with conducting metal part successively along the direction of motion, interval location place insulation often between adjacent two conducting metal parts, described conducting metal part has cross-over connection length, this cross-over connection length makes satisfied two conditions: first, when closing position, adjacent two conducting metal parts on the second switch contact of the conducting metal part on the first switch contact cross-over connection and its adaptation successively also realize first, the conducting of second switch contact, the second, when open position, the interval location place between adjacent two the conducting metal parts on the second switch contact of its adaptation of at least one end of the conducting metal part on the first switch contact also realizes cut-offfing of first, second switch contact.

2. ultrahigh speed mechanical switch according to claim 1, it is characterized in that, conducting metal part on first, second switch contact described is all insulated successively by insulated connecting piece and separates, and described second switch contact has to coincide with the outer peripheral face of the first switch contact and coordinates and insert for the first switch contact and realize the spliced eye of divide-shut brake in the relative movement of contact axis.

3. ultrahigh speed mechanical switch according to claim 2, it is characterized in that, conducting metal part on first, second switch contact described and insulated connecting piece are circular tube shaped, and the first switch contact is identical with the structure of the conducting metal part on second switch contact, first switch contact is identical with the insulated connecting piece structure on second switch contact, and the length of conducting metal part is all greater than the length of insulated connecting piece.

4. a switch fracture, comprise the first switch contact and second switch contact, first, second switch contact under the driving of corresponding operating mechanism relatively near or away from realization close a floodgate or separating brake, close a floodgate time first, second switch contact is all in closing position, when separating brake first, second switch contact is all in open position, it is characterized in that, first, second switch contact is interval with conducting metal part successively along the direction of motion, interval location place insulation often between adjacent two conducting metal parts, described conducting metal part has cross-over connection length, this cross-over connection length makes satisfied two conditions: first, when closing position, adjacent two conducting metal parts on the second switch contact of the conducting metal part on the first switch contact cross-over connection and its adaptation successively also realize first, the conducting of second switch contact, the second, when open position, the interval location place between adjacent two the conducting metal parts on the second switch contact of its adaptation of at least one end of the conducting metal part on the first switch contact also realizes cut-offfing of first, second switch contact.

5. switch fracture according to claim 4, it is characterized in that, conducting metal part on first, second switch contact described is all insulated successively by insulated connecting piece and separates, and described second switch contact has to coincide with the outer peripheral face of the first switch contact and coordinates and insert for the first switch contact and realize the spliced eye of divide-shut brake in the relative movement of contact axis.

6. switch fracture according to claim 5, it is characterized in that, conducting metal part on first, second switch contact described and insulated connecting piece are circular tube shaped, and the first switch contact is identical with the structure of the conducting metal part on second switch contact, first switch contact is identical with the insulated connecting piece structure on second switch contact, and the length of conducting metal part is all greater than the length of insulated connecting piece.

7. a kind of switch contact, it is characterized in that, comprise contact body, described contact body is interval with conducting metal part successively along moving, interval location place insulation often between adjacent two conducting metal parts, described conducting metal part has cross-over connection length, and this cross-over connection length meets two conditions: first, when closing position, the conducting metal part in this contact body can adjacent two conducting metal parts in the contact body of cross-over connection and this contact body adaptation; The second, when open position, the interval location place between adjacent two the conducting metal parts in the contact body of its adaptation of at least one end of the conducting metal part in this contact body.

8. switch contact according to claim 7, is characterized in that, the conducting metal part in described contact body is by insulated connecting piece insulation gap successively, and described conducting metal part and insulated connecting piece are tubulose.

9. switch contact according to claim 8, it is characterized in that, each conducting metal part structure in described contact body is all identical, and each insulated connecting piece structure in described contact body is all identical, and the length of conducting metal part is greater than the length of insulated connecting piece.