CN112002602B - a high-speed switch - Google Patents

Abstract

The invention relates to a high-speed switch, which specifically includes: a moving contact assembly and a stationary contact assembly; an operating mechanism; The contact is kept at the closing limit position; the static contact assembly includes a static contact, an elastic buffer structure, and a limit structure that stops and limits the static contact; the elastic force provided by the elastic buffer structure to the static contact is greater than The spring retaining structure provides the elastic force to the moving contact, and during the closing process, the moving contact is driven by the operating mechanism to first overcome the force of the elastic buffer structure to push back the static contact, and the driving force of the operating mechanism After being removed, the elastic buffer structure pushes the static contact and pushes the moving contact back in the opposite direction until the static contact is blocked by the limiting structure, and the moving and static contacts are elastically pressed against each other. The high-speed switch of the present invention has fast opening and closing response speed, and has better applicability in flexible direct current transmission and direct current grid.

Description

a high-speed switch

technical field

The invention relates to the technical field of high-voltage flexible direct current transmission switch equipment, in particular to a high-speed switch fracture structure and a high-speed switch.

Background technique

With the development of clean energy and large-scale grid-connected applications, flexible DC transmission and DC grid technology have developed rapidly. In order to meet the application needs of flexible DC transmission and DC power grid, the circuit breaker for breaking DC fault current in milliseconds has become a necessary equipment for the transmission network. Therefore, high-speed mechanical switchgear with extremely short breaking time has become the research topic of most power equipment manufacturers. main aspects.

In the research on high-speed mechanical switches, there are mainly two aspects. One is the research on the operating mechanism, which is to improve the breaking performance of the high-speed mechanical switch by improving the response speed and load of the operating mechanism. It is realized that the operating mechanism has a relatively high corresponding speed, and a good buffer braking effect is realized. The second is the research on switch fractures. For example, the way that the dynamic and static contacts of the fracture structure realize conduction through end-face contact has the advantage of shorter breaking stroke compared with mutual insertion. It is widely used.

However, there are also corresponding problems in the research process of the above two different directions. For example, the fracture structure of end-face contact faces the problem that the contact is greatly impacted, especially in the process of rapid closing of the moving contact, which often affects the static electricity. The contact causes severe impact, which not only easily causes the contact to bounce and cause arcing, but also seriously damages the dynamic and static contacts and greatly reduces the service life.

In response to such a problem, there are corresponding ways to improve it in the prior art. For example, a fast vacuum switch for protecting high-power power electronic converters disclosed in the Chinese Invention Patent Application Publication No. CN102184795A has a moving contact The opening and closing action is driven by the permanent magnet operating mechanism, and the static contact slides the tea house in the contact finger seat and is pressed by the spring in the contact finger seat. When it is closed, the operating mechanism drives the moving contact to move towards the static contact and pushes the static contact into the contact finger seat for a certain distance to reach the closing position. At this time, the spring is compressed and stored. , the operating mechanism drives the moving contact away from the static contact. At this time, the spring retracts the moving and static contact together with the moving contact and releases energy, providing a certain initial force to the moving contact, making it have a certain initial speed.

However, this vacuum switch has a buffering effect when the moving contact is closed and impacts the static contact by arranging a spring on the back side of the static contact, but it makes the moving contact push the static contact to move a certain distance. Under the force of the spring, the static contact also needs to move with the moving contact for a certain distance. Although the initial speed of opening of the moving contact can be improved through the energy released by the spring, the response time of the separation of the moving and static contacts during opening is actually On the contrary, it cannot be separated as soon as possible when the moving and static contacts need to be separated, which affects the performance of the switch.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a high-speed switch, which is used to solve the problem of slow opening response speed of the existing high-speed switch.

The high-speed switch of the present invention includes:

Fracture structure, including moving contact assembly and static contact assembly;

An operating mechanism, the output end of which is connected with the moving contact included in the moving contact assembly, and drives the moving contact to open and close;

The spring retaining structure is installed on the side of the moving contact assembly facing away from the stationary contact assembly, and is used to keep the moving contact at the closing limit position;

A static contact assembly includes a static contact, an elastic buffer structure disposed on the side of the static contact facing away from the moving contact, and a limiter for blocking and limiting the static contact on the side facing the moving contact assembly structure;

The elastic force provided by the elastic buffer structure to the static contact is greater than the elastic force provided by the spring retaining structure to the movable contact, and during the closing process, the movable contact first overcomes the force of the elastic buffer structure driven by the operating mechanism The static contact is pushed back. After the driving force of the operating mechanism is removed, the elastic buffer structure pushes the static contact and reversely pushes the moving contact back until the static contact is blocked by the limiting structure. Elastic hold.

When the high-speed switch of the present invention is in use, during the closing process, the operating mechanism drives the moving contacts to move at high speed toward the static contacts. When the moving and static contacts are in contact, the static contacts are impacted by the moving contacts, and the elastic buffer structure acts as a buffer. Due to the elastic support of the elastic buffer structure, the static contact will not bounce with the moving contact due to the instantaneous impact of the moving contact. It is more reliable; after the closing is completed, the driving force of the operating mechanism to the moving contact is removed. At this time, since the elastic force of the elastic buffer structure is greater than that of the spring holding structure, the static contact will push in the opposite direction. The contact moves until it is blocked by the limiting structure. At this time, under the double action of the elastic buffer structure and the spring holding structure, the moving and static contacts are elastically pressed to ensure reliable conduction; when the brake is opened, the moving contact is operating. Driven by the moving mechanism, it can be directly separated from the static contact to achieve rapid opening. The high-speed switch of the present invention can be closed at a relatively high speed without bouncing, the dynamic and static contacts are reliably abutted in the closed state, and the dynamic and static contacts can be directly disengaged when the switch is opened, thereby realizing rapid opening, opening and closing. Brake response is fast.

Further, the stationary contact assembly includes a stationary contact seat, the stationary contact and the stationary contact seat are guided and slidably assembled, and communicate with each other, and the limiting structure is arranged on the stationary contact seat. The limiting structure is integrated on the static contact seat, the structure is simple, the setting is convenient, and the space is not occupied too much.

Further, the stationary contact is provided with a blocking structure, and the stationary contact seat is provided with an annular stepped surface for blocking and matching with the blocking structure, and the annular stepped surface constitutes the limiting structure. The annular step surface is used as the limiting structure, which is convenient for processing and manufacturing, and the stop structure on the static contact is reliably limited, which better ensures the position of the static contact and the opening distance of the fracture structure.

Further, the static contact seat is provided with a stepped through hole, the static contact is guided and slidably assembled in the small diameter section of the stepped through hole, and a portion of the static contact located in the large diameter section of the stepped through hole is provided. In the blocking structure, the stepped surface of the stepped through hole constitutes the annular stepped surface, and the elastic buffer structure is arranged in the large diameter section of the stepped through hole. On the one hand, this kind of structure design simply realizes the limiting structure, and on the other hand, the elastic buffer structure is arranged in the stepped through hole, so that the structure is more compact and the integration degree is higher.

Further, the blocking structure is a positioning nut screwed on the end of the stationary contact. By using the positioning nut as a stop structure, on the one hand, the installation needs of the static contact and the static contact seat are realized, and on the other hand, the relative position of the static contact and the static contact seat can be adjusted by adjusting the screwing position of the positioning nut, which is convenient for adjustment. The distance between the moving and static contacts.

Further, the static contact assembly further includes a top blocking member fixed on the static contact seat, the top blocking member includes a fixed plate body and a top rod vertically connected to the fixed plate body, and the fixed plate body is fixedly connected to the static contact seat, The ejector rod extends into the large diameter section of the stepped through hole, and the elastic buffer structure is a compression spring clamped between the ejector rod and the static contact. The compression spring is compressed in the static contact seat by the top blocking member, which reduces the overall space occupied by the static contact assembly, makes the static contact assembly more compact, and at the same time better restricts the compression spring and makes its elastic action more stable.

Further, one of the top rod and the static contact is provided with a stabilizing hole into which the compression spring is partially installed. The restriction of the compression spring through the stabilization hole ensures that it provides elastic support in the axial direction to avoid deflection or twisting.

Further, the operating mechanism is a repulsion force mechanism, the repulsion force mechanism includes oppositely arranged opening and closing coils and a repulsion force disc between the opening and closing coils, and the repulsion force mechanism also includes an insulating pull rod, and the insulating pull rod passes through the opening and closing coil and is connected with the coil. The moving contact is connected, and the repulsion disc is fixedly connected with the insulating rod. The repulsive force operating mechanism is used to further ensure the opening and closing response speed of the high-speed switch.

Further, the spring holding structure includes two or more elastic pushing components arranged on the axial side of the insulating rod, the elastic pushing direction of the elastic pushing components is the horizontal direction, and the elastic pushing end of the elastic pushing components is connected to the insulating rod. The tie rods are connected by connecting rods. In this kind of spring retaining structure, in the opening and closing movement stroke of the insulating pull rod, the middle position of the stroke is the position where the elastic force is the largest, so that after the insulating pull rod passes through the middle position, the moving contact can be adjusted at the opening position and the closing position respectively. Hold, and, at the closing position, the moving contact is pushed back by a certain distance due to the static contact, so that the distance between the moving contact from the closing position to the middle position where the elastic force is the largest is shortened , When the operating mechanism drives the moving contact to open, it can more quickly cross the middle position with larger elastic force to reach the opening position, which further improves the opening speed.

Description of drawings

1 is a schematic structural diagram of Embodiment 1 of the high-speed switch of the present invention in a closed state;

2 is a schematic structural diagram of Embodiment 1 of the high-speed switch of the present invention in an open state;

In the figure: 1-operating unit; 10-repulsion mechanism; 20-insulation sleeve; 21-moving contact; 22-static contact; 220-static contact seat; 221-positioning nut; 3-compression spring; 4- Top plug; 5-spring retaining structure.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention, that is, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present invention.

It should be noted that relational terms such as the terms "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion such that a process, method, article or device comprising a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

The features and performances of the present invention will be further described in detail below in conjunction with the embodiments.

The specific embodiment one of the high-speed switch of the present invention:

As shown in Figures 1-2, the high-speed switch of the present invention includes an operating unit 1 and a fracture structure. For the convenience of description, the following descriptions are based on the directions shown in the figures, and do not limit the actual directions of the components of the high-speed switch when they are used. Wherein, the fracture structure includes an insulating sleeve 20, and the upper and lower ends of the insulating sleeve 20 are sealed and installed with wiring seats respectively. A moving contact assembly and a stationary contact assembly are installed in the insulating sleeve 20 oppositely. The moving contact assembly includes a moving contact seat fixedly installed on the lower wiring seat and a moving contact 21 that is guided and slidably installed in the moving contact seat. The head 21 realizes conduction with the lower wiring seat by being in conductive contact with the movable contact seat. The stationary contact assembly includes a stationary contact seat 220 integrally formed with the upper wiring seat and a stationary contact 22 that is guided and slidably installed in the stationary contact seat. on.

The static contact seat 220 has a hollow columnar structure, the inner hole of the hollow columnar structure is a stepped through hole, and the static contact 220 is guided and slidably fitted with the small diameter section of the stepped through hole. An elastic buffer structure is installed in the large diameter section of the stepped through hole. The elastic buffer structure is mainly used to provide downward elastic force to the static contact, so as to play an elastic buffering role when the moving contact performs the closing action and causes an impact to the static contact.

Specifically, a top blocking member 4 is fixedly installed on the static contact seat. The top blocking member 4 includes a fixed plate body and a top rod integrally formed on one side of the fixed plate body. The fixed plate body is fixedly connected to the static contact seat, and the top rod extends Into the large diameter section of the stepped through hole, the elastic buffer structure is a compression spring 3 sandwiched between the top rod and the static contact 22 . Preferably, in this embodiment, the end of the ejector rod facing the static contact 22 is provided with a blind hole to form a stabilization hole, which is used for most of the compression spring 3 to be loaded. The static contacts 22 are offset. The stabilization hole can ensure that the compression spring 3 is in a straight state as a whole. When the static contact is pressed against the static contact, it provides an elastic force extending axially to the static contact 22. It can also be seen from the structure shown in the figure that the force in this direction is exactly the same as When the moving contact is closed, the impact force on the static contact is exactly opposite.

Of course, the static contact 22 should maintain a certain position in a natural state, which requires a limiting structure to limit the elastic pressing of the compression spring 3 on the static contact 22 . As shown in the figure, one end of the static contact 22 in the large diameter section of the stepped through hole, that is, the end that is pressed against the compression spring 3, is also provided with a blocking structure, which is just in line with the stepped through hole. The stepped surfaces are matched, and under the action of the compression spring 3, the blocking structure is in close contact with the stepped surface of the stepped through hole to determine the position of the static contact.

As can be seen from the figure, in this embodiment, the end of the static contact 22 used for abutting contact with the moving contact 21 is integrally formed with a disk-shaped structure, and the end of the moving contact 21 used for abutting contact with the static contact 22 One end is also integrally formed with a disc-shaped structure, which is to achieve a larger contact area, increase the co-current capability and the reliability of the conductive contact. Then, in order to realize the installation of the static contact into the static contact seat more conveniently, the present embodiment adopts the positioning nut 221 threaded on the end of the static contact facing away from the moving contact as the blocking structure, so that the After the static contact is installed from the small diameter section of the static contact seat, the positioning nut is screwed. Moreover, by adjusting the position of the positioning nut 221 on the stationary contact 22, the length of the stationary contact 22 extending out of the small diameter section of the stepped through hole can be adjusted, that is, the position of the stationary contact relative to the stationary contact seat can be adjusted, so as to realize the dynamic and stationary contact The distance adjustment between the heads is more convenient for the debugging and assembly of the high-speed switch.

In the overall structural design of the static contact assembly described above, the elastic buffer structure is integrated into the static contact seat, which makes the structure of the entire static contact assembly more compact and reduces the space occupied.

Furthermore, the operating unit 1 includes a repulsion mechanism 10 and a spring holding structure 5 . The repulsive force mechanism 10 includes the oppositely arranged opening and closing coils and a repulsion force disc between the opening and closing coils, the repulsion force mechanism also includes an insulating pull rod, the repulsion force disk and the insulating pull rod are fixedly connected, and the insulating pull rods pass through the opening and closing coils respectively, and are extending. One end of the inner hole of the movable contact seat is connected with the movable contact, and the other end is connected with the spring holding structure 5 . The spring retaining structure 5 includes two elastic push assemblies arranged on the axial side of the insulating pull rod. The two elastic push assemblies are symmetrically arranged. The elastic push direction of the elastic push assemblies is the horizontal direction. The pressing end is connected with the end of the insulating pull rod through a connecting rod. Of course, the present invention does not specifically limit the number of elastic push assemblies. In other embodiments, a larger elastic holding force is required, and three or four elastic push assemblies may be provided. The jacking assemblies are evenly distributed around the axis of the insulating pull rod.

When the moving contact is at the closing position, the end of the insulating pull rod is at the upper side of the two elastic push assemblies, and when the moving contact is at the opening position, the end of the insulating pull rod is at the two elastic push assemblies The lower side position of the moving contact, and at the middle position of the opening and closing stroke of the moving contact, the end of the insulating pull rod is roughly in a position that is coplanar with the two elastic push assemblies, and at this position, the elasticity of the elastic push assembly The maximum force, that is to say, when the insulating pull rod drives the moving contact from opening to closing or from closing to opening, the elastic push component initially acts as a hindrance, only the end of the insulating pull rod The facilitation effect occurs only after crossing the position between the two elastic push-up components. In this way, the movable contact can be kept in the opening position or the closing position by the elastic pushing assembly.

Specifically, the operating unit can fully adopt the structure of the repulsive force operating mechanism disclosed in the Chinese Invention Patent No. CN104362050B cited in the background art of this paper, and its specific structure and working principle will not be described in detail.

In the high-speed switch of the present invention, a spring holding structure is arranged on the side of the moving contact facing away from the stationary contact, and an elastic buffer structure is arranged on the side of the stationary contact facing away from the moving contact, so that when the high-speed switch is working, as in During the closing process, the operating mechanism drives the moving contact towards the static contact at high speed through the insulating rod. The driving force of the operating mechanism completely overcomes the holding force of the spring retaining structure and drives the moving contact to move upward. During contact, the static contact is impacted by the moving contact, and the elastic buffer structure plays a buffering role and is compressed. At this time, the static contact moves up and back with the moving contact. Due to the elastic support of the elastic buffer structure, the static contact There will be no bouncing with the moving contact due to the instantaneous impact of the moving contact, and the contact is more reliable; when maintaining a stable state of closing, under the dual action of the elastic buffer structure and the spring holding structure, the moving and static contacts are elastically tight. , to ensure reliable conduction.

In addition, it is also more critical that the elastic force provided by the elastic buffer structure to the static contact is greater than the elastic force provided by the spring retaining structure to the movable contact. In this way, after the closing action of the moving contact is completed, when the operating mechanism removes the driving force for the moving contact, since the elastic force of the elastic buffer structure is greater than the elastic force of the spring holding structure, the static contact will push the contact in the opposite direction. The head moves downward until it is blocked by the limit structure and cannot continue to move downward, and the closing stable state is reached. Then when the opening is started, the driving force of the operating mechanism acts on the moving contact through the insulating pull rod, which can directly drive the moving contact away from the static contact. Moreover, according to the above analysis, it can be seen that in the stable state of closing, the moving contact has actually retreated from the farthest upward distance, that is to say, the distance from its return to the opening position is reduced by a certain distance, then its Under the driving action of the operating mechanism, the time to return to the opening position will be shorter. Therefore, compared with the vacuum switch disclosed in the Chinese invention patent with the application publication number CN102184795A confirmed in the background art of this article, the opening time is improved. response speed.

It can be seen from the above description that the high-speed switch of the present invention can be closed at a relatively high speed without bouncing, the dynamic and static contacts are reliably abutted in the closed state, and the dynamic and static contacts can be directly disengaged when the switch is opened, so as to realize Fast opening, fast opening and closing response, and better applicability in flexible DC transmission and DC grid.

Of course, the high-speed switch of the present invention is not limited to the above-mentioned embodiment. Several other embodiments of the high-speed switch based on the design concept of the present invention are also listed below.

For example, in other embodiments, different from the above-mentioned first embodiment, the operating mechanism can be a spring operating mechanism or a hydraulic operating mechanism, which are the existing relatively mature high-pressure switch operating mechanisms, which can be easily replaced use. In the replacement use, the relative position of the operating mechanism and the spring holding structure can be appropriately adjusted according to the actual needs. These adjustments to the position and the adaptive changes in the structure are all conventional designs that can be made by those skilled in the art, and are not repeated here. Detailed Description.

For example, the spring retaining structure can be a retaining structure only used to keep the moving contact in the closing position. For example, a gas spring is installed at the end of the insulating rod facing away from the moving contact. During the closing action and in the stable closing state, The gas spring is filled with high-pressure gas, which should provide elastic support for the moving contact. During the opening process and in the stable state of the opening, the pressure in the gas spring is released to avoid hindering the opening action. Of course, the charging and discharging control system of the gas spring is connected with the control system of the operating mechanism to respond to each other.

For another example, in other embodiments, different from the above-mentioned first embodiment, the disk-shaped structure of the end of the static contact for abutting with the moving contact is a detachable structure, so that the static contact can be installed first. After the guide sliding installation hole of the static contact seat is installed, the disk-shaped structure is installed, and at this time, the positioning nut can be replaced by the stop structure integrally formed by the static contact.

Or, in other embodiments, different from the above-mentioned first embodiment, the inner hole of the hollow columnar structure of the static contact seat is a through hole structure with the same diameter, and the static contact is guided and slidably installed in the through hole to limit the static contact The stop structure at the head position is installed on the upper wiring seat, which is an L-shaped limit plate structure. The upper end of the L-shaped limit plate is connected to the upper wiring seat, and the lower hook portion is connected to the upper part of the static contact protruding from the static contact seat. The radial lug hooks the stopper.

Still alternatively, in other embodiments, different from the above-mentioned first embodiment, the static contact seat is a columnar structure, and the upper end and the upper wiring seat are integrally formed, the static contact guide sliding sleeve is sleeved on the cylindrical static contact seat, and the static contact The bellows is clamped between the annular end face of the upper wiring seat and the upper wiring seat. The bellows acts as an elastic buffer structure to provide elastic force to the static contact. The stop structure for limiting the position of the static contact is installed on the upper wiring seat, which is an L-shaped limit Position plate structure, the upper end of the L-shaped limit plate is connected with the upper wiring seat, and the hook part of the lower end is hooked and stopped by the radial protrusion on the static contact.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. The scope of patent protection of the present invention is subject to the claims. Any equivalent structural changes made by using the contents of the description and drawings of the present invention, Similarly, all should be included in the protection scope of the present invention.

Claims (9)

1. A high-speed switch, comprising: Fracture structure, including moving contact assembly and static contact assembly; An operating mechanism, the output end of which is connected with the moving contact included in the moving contact assembly, and drives the moving contact to open and close; Its characteristics are: High-speed switches also include: The spring retaining structure is installed on the side of the moving contact assembly facing away from the stationary contact assembly, and is used to keep the moving contact at the closing limit position; A static contact assembly includes a static contact, an elastic buffer structure disposed on the side of the static contact facing away from the moving contact, and a limiter for blocking and limiting the static contact on the side facing the moving contact assembly structure; The elastic force provided by the elastic buffer structure to the static contact is greater than the elastic force provided by the spring retaining structure to the movable contact, and during the closing process, the movable contact first overcomes the force of the elastic buffer structure driven by the operating mechanism The static contact is pushed back. After the driving force of the operating mechanism is removed, the elastic buffer structure pushes the static contact and reversely pushes the moving contact back until the static contact is blocked by the limiting structure. Elastic hold. 2 . The high-speed switch according to claim 1 , wherein the static contact assembly comprises a static contact seat, the static contact and the static contact seat are guided and slidably assembled, and the two are connected to each other, and the limit structure Set on the static contact seat. 3 . The high-speed switch according to claim 2 , wherein the stationary contact is provided with a stop structure, and the stationary contact seat is provided with an annular stepped surface that cooperates with the stop structure. The surface constitutes the limiting structure. 4. The high-speed switch according to claim 3, wherein the static contact seat is provided with a stepped through hole, the static contact is guided and slidably assembled in the small diameter section of the stepped through hole, and the static contact is in the stepped through hole. The blocking structure is provided on the part in the large diameter section of the stepped through hole, the stepped surface of the stepped through hole constitutes the annular stepped surface, and the elastic buffer structure is arranged in the large diameter section of the stepped through hole. 5 . The high-speed switch according to claim 4 , wherein the blocking structure is a positioning nut screwed on the end of the stationary contact. 6 . 6 . The high-speed switch according to claim 4 , wherein the static contact assembly further comprises a top blocking member fixed on the static contact seat, and the top blocking member comprises a fixed plate body and a top plug vertically connected to the fixed plate body. 7 . The rod, the fixed plate body is fixedly connected to the static contact seat, the top rod extends into the large diameter section of the stepped through hole, and the elastic buffer structure is a compression spring clamped between the top rod and the static contact. 7 . The high-speed switch according to claim 6 , wherein one of the top rod and the static contact is provided with a stabilizing hole into which the compression spring part is installed. 8 . 8. The high-speed switch according to any one of claims 1-7, wherein the operating mechanism is a repulsive force mechanism, and the repulsive force mechanism comprises oppositely arranged opening and closing coils and a repulsive force between the opening and closing coils The repulsion force mechanism also includes an insulating pull rod, the insulating pull rod passes through the opening and closing coil and is connected with the movable contact, and the repulsion force disk is fixedly connected with the insulating pull rod. 9 . The high-speed switch according to claim 8 , wherein the spring retaining structure comprises two or more elastic push assemblies arranged on the axial side of the insulating pull rod, and the elastic push direction of the elastic push assemblies is horizontal. 10 . direction, the elastic pushing end of the elastic pushing component is connected with the insulating pull rod through a connecting rod.

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