Highly reliable bypass switch

Abstract

The utility model discloses a kind of high-reliability bypass switches, comprising: insulating frame, drive mechanism and switch device installed in insulating frame, and transmission assembly connected between drive mechanism and switch device;Transmission assembly includes insulating pull rod assembly and linkage lever, insulating pull rod assembly is provided with first pull rod, and first pull rod is distributed with the output rod of drive mechanism dislocation parallel;One end of linkage lever is hinged to the first fixed plate on insulating frame, and first fulcrum portion and second fulcrum portion are sequentially spaced from one end of linkage lever towards another end, first fulcrum portion is movably connected to first pull rod, and second fulcrum portion is movably connected to output rod;Drive mechanism is used to drive output rod to push linkage lever to rotate, and switch device is closed by insulating pull rod assembly drive.This utility model can reduce the failure risk caused by concentricity problem, reduce the force value required by drive mechanism, and structure is simple, significantly improve the reliability and stability of bypass switch work.

Description

Technical Field

[0001] This utility model relates to the field of power switchgear technology, and in particular to a highly reliable bypass switch. Background Technology

[0002] Bypass switches can perform on-load closing, off-load opening, electromagnetic closing, and manual opening and closing operations, and are now widely used in various power equipment. For example, in the field of flexible DC transmission and distribution, when a submodule of a modular multilevel converter fails, a fast bypass switch can quickly disconnect the faulty submodule within milliseconds, ensuring the normal operation of the system. As another example, when new power generation methods such as photovoltaic solar and wind power are connected to the grid, if a fault occurs in the main circuit, the bypass switch can bypass the main circuit fault, ensuring the normal operation of the entire power grid without power interruption.

[0003] Traditional bypass switches typically employ a coaxial drive system for opening and closing operations. This means the drive shaft of the mechanism is coaxial with the insulator, pull rod, and vacuum switch tube. This method demands extremely high coaxiality; any errors in manufacturing or assembly precision not only affect the closing speed, failing to meet rapid response requirements, but can also cause repeated bouncing during closing due to misalignment, severely impacting the reliability of the bypass switch and ultimately threatening the stable operation of the entire power system. Furthermore, this coaxial drive system requires a large force. To meet this demand, the drive mechanism must be designed to be bulky, increasing both product size and energy consumption, negatively impacting energy efficiency and cost control. Therefore, it is necessary to improve the existing technology to overcome its shortcomings. Utility Model Content

[0004] The problem to be solved by this utility model is to provide a highly reliable bypass switch to overcome the shortcomings of existing bypass switches, such as low reliability and large opening and closing force requirements.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a highly reliable bypass switch, comprising: an insulating frame, a drive mechanism and a switching device mounted on the insulating frame, and a transmission assembly connected between the drive mechanism and the switching device; the transmission assembly includes an insulating pull rod assembly and a linkage lever, the insulating pull rod assembly is provided with a first pull rod, the first pull rod being offset and parallel to the output rod of the drive mechanism; one end of the linkage lever is hinged to a first fixed plate on the insulating frame, and the linkage lever is provided with a first fulcrum and a second fulcrum at intervals from one end to the other, the first fulcrum being movably connected to the first pull rod, and the second fulcrum being movably connected to the output rod; the drive mechanism is used to drive the output rod to push the linkage lever to rotate, and drive the switching device to close through the insulating pull rod assembly.

[0006] As a further improvement of this utility model, the end of the first pull rod away from the switch device extends to the side of the corresponding end of the output rod, and two first limiting baffles are provided on the first pull rod at intervals, with the first fulcrum limited between the two first limiting baffles; one end of the output rod is provided with two second limiting baffles at intervals, with the second fulcrum limited between the two second limiting baffles.

[0007] As a further improvement of this utility model, the first fulcrum portion is provided with a first arc-shaped protrusion on both sides facing the two first limiting baffles, and the two first arc-shaped protrusions are respectively used to abut against the two first limiting baffles; the second fulcrum portion is provided with a second arc-shaped protrusion on both sides facing the two second limiting baffles, and the two second arc-shaped protrusions are respectively used to abut against the two second limiting baffles.

[0008] As a further improvement of this utility model, a lever bracket is installed on the first fixed plate, and one end of the linkage lever is rotatably connected to the lever bracket via a pin.

[0009] As a further improvement of this utility model, the pin, the first fulcrum and the second fulcrum are on the same straight line, and the other end of the linkage lever is bent at an inclination towards the closing drive direction of the drive mechanism.

[0010] As a further improvement of this utility model, the high-reliability bypass switch also includes a manual disconnect lever, which is fixedly connected to the other end of the linkage lever.

[0011] As a further improvement of this utility model, the insulating pull rod assembly includes an insulator and a second pull rod, the insulator being fixedly connected between the first pull rod and the second pull rod, and the end of the second pull rod away from the insulator being fixedly connected to the moving contact of the switching device.

[0012] As a further improvement of this utility model, an insulating baffle is integrally provided in the middle of the insulating frame, and an avoidance hole is opened in the middle of the insulating baffle, and the insulator is located in the avoidance hole; a closing spring is fitted on the second pull rod, and the closing spring is located between the insulating baffle and the switching device, and the closing spring always applies an elastic force to the moving end contact in the direction of the stationary end contact of the switching device.

[0013] As a further improvement of this utility model, the high-reliability bypass switch also includes a housing, and the insulating frame is fixed inside the housing; the switching device is connected to a moving conductor and a stationary conductor, and both the moving conductor and the stationary conductor extend outward through the housing.

[0014] As a further improvement of this utility model, the driving mechanism is a permanent magnet operating mechanism; the switching device is a vacuum switch tube.

[0015] The beneficial effects of this utility model are:

[0016] 1. This utility model provides a highly reliable bypass switch. By offsetting and paralleling the output rod of the drive mechanism with the first pull rod of the insulating pull rod assembly, and achieving transmission between the output rod and the first pull rod through a linkage lever, it not only reduces the risk of failure caused by coaxiality issues, but also simplifies the structure, effectively reduces the number of parts and the difficulty of matching between components, and significantly improves the reliability and stability of the bypass switch. At the same time, the linkage lever can also cleverly reduce the force required by the drive mechanism, thereby reducing the size and energy consumption of the drive mechanism to a certain extent and reducing equipment costs.

[0017] 2. This utility model, by employing a first arc-shaped protrusion in conjunction with a first limiting baffle and a second arc-shaped protrusion in conjunction with a second limiting baffle, has a certain degree of flexibility and can tolerate a certain degree of assembly error or small displacement during operation. Even if there is a small deviation in the relative position between the transmission components, it can still maintain good contact and transmit power, further improving the reliability and stability of the bypass switch.

[0018] 3. The structural design of the insulating frame in this utility model can completely isolate the primary main circuit from the secondary drive circuit, improve the overall insulation performance of the equipment, reduce the risk of electrical accidents, and ensure the safety of operators and equipment. In addition, by setting the closing spring on the second pull rod and having its elastic force act directly on the insulating frame and the moving end contact, not only can the strength of the insulator be increased, but also a larger contact pressure can be provided, completely suppressing the closing bounce phenomenon and extending the service life of the switchgear. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a perspective view of the high-reliability bypass switch of this utility model;

[0021] Figure 2 This is a diagram showing the cover of the high-reliability bypass switch of this utility model in the open state.

[0022] Figure 3 This is a perspective view of the high-reliability bypass switch of this utility model after removing the outer casing;

[0023] Figure 4 This is a cross-sectional view of the high-reliability bypass switch of this utility model after removing the outer casing;

[0024] Figure 5 This is a perspective view of the drive mechanism and transmission components in the high-reliability bypass switch of this utility model;

[0025] Figure 6 This is a perspective view of the first pull rod, output rod, linkage lever, and manual release lever in the high-reliability bypass switch of this utility model.

[0026] Referring to the accompanying drawings, the following explanations are provided:

[0027] 1. Insulating frame; 101. First fixing plate; 102. Insulating baffle; 1021. Clearance hole; 103. Second fixing plate; 2. Drive mechanism; 201. Output rod; 2011. Second limit baffle; 3. Switching device; 301. Moving end contact; 302. Stationary end contact; 4. Linkage lever; 401. First fulcrum; 4011. First arc-shaped protrusion; 402. Second fulcrum; 4021. Second arc-shaped protrusion; 5. First pull rod; 501. First limit baffle; 6. Lever bracket; 7. Pin; 8. Hand release rod; 9. Insulator; 10. Second pull rod; 11. Closing spring; 12. Housing; 13. Moving conductor bus; 14. Stationary conductor bus; 15. Embedded nut; 16. Support baffle; 17. Locking nut. Detailed Implementation

[0028] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0030] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0031] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0032] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0033] See Figures 1 to 6 This utility model provides a highly reliable bypass switch, including: an insulating frame 1, a drive mechanism 2, a switching device 3, and a transmission assembly.

[0034] The insulating frame 1 has a rectangular structure, with a first fixing plate 101 and a second fixing plate 103 respectively at its left and right ends. The drive mechanism 2 is installed on the outer side of the first fixing plate 101, and the switch device 3 is installed on the inner side of the second fixing plate 103 and is located inside the insulating frame 1.

[0035] Furthermore, the transmission component is connected between the drive mechanism 2 and the switch device 3, and the drive mechanism 2 can drive the switch device 3 to close the circuit through the transmission component.

[0036] Specifically, the transmission assembly includes an insulated pull rod assembly and a linkage lever 4. The insulated pull rod assembly includes a first pull rod 5, and the drive mechanism 2 is provided with an output rod 201. The first pull rod 5 and the output rod 201 are staggered and parallel.

[0037] It should be noted that the staggered parallel distribution in this article refers to the fact that the first pull rod 5 and the output rod 201 are parallel to each other and distributed on different axes, and the first pull rod 5 and the output rod 201 are staggered by a certain distance in three-dimensional space.

[0038] As one of the important improvements of this utility model, one end of the linkage lever 4 is hinged to the first fixing plate 101 on the insulating frame 1, and the linkage lever 4 is provided with a first fulcrum 401 and a second fulcrum 402 at intervals from one end to the other. The first fulcrum 401 is movably connected to the first pull rod 5, and the second fulcrum 402 is movably connected to the output rod 201.

[0039] When the switch device 3 is in the open state, and a fault occurs in the circuit requiring a closing operation, the drive mechanism 2 is energized and operates. The drive mechanism 2 drives the output rod 201 to extend toward the switch device 3. The output rod 201 cooperates with the second fulcrum 402 to push the linkage lever 4 to rotate around one end hinged to the first fixed plate 101. At the same time, with the cooperation of the first fulcrum 401 of the linkage lever 4 and the first pull rod 5, the linkage lever 4 pushes the insulating pull rod assembly and drives the switch device 3 to close.

[0040] This invention achieves transmission between the output rod 201 of the drive mechanism 2 and the first pull rod 5 of the insulating pull rod assembly by offset parallel distribution, and by using a linkage lever 4 between the output rod 201 and the first pull rod 5. This offset shaft drive method completely eliminates the stringent coaxiality requirements of products that pursue fast closing and zero bounce. This means that even if there is a certain degree of precision error during the processing and assembly of various components, it will not have a serious impact on the closing performance like traditional coaxial drives, greatly reducing the risk of failure caused by coaxiality issues and significantly improving the reliability and stability of the bypass switch.

[0041] Since the linkage lever 4 is hinged to one end of the first fixed plate 101 as a rotation fulcrum, and the distance between the second fulcrum 402 and the rotation fulcrum is greater than the distance between the first fulcrum 401 and the rotation fulcrum, the lever ratio between the output rod 201 and the first pull rod 5 is greater than 1. This cleverly reduces the force required by the drive mechanism 2, which allows the drive mechanism 2 to achieve the normal closing operation of the switch device 3 without outputting excessive force. This can reduce the size and energy consumption of the drive mechanism 2 to a certain extent and reduce the equipment cost.

[0042] Furthermore, this utility model uses only one set of linkage levers 4 to realize the transmission between the drive mechanism 2 and the switch device 3. Compared with the traditional complex transmission structure, it greatly reduces the number of parts, which not only reduces production costs, but also reduces the difficulty of matching between various parts, reduces the possibility of failure caused by improper matching of parts, and further improves the reliability and stability of the bypass switch.

[0043] See Figure 5 and Figure 6 One end of the output rod 201 extends through the first fixing plate 101 toward the interior of the insulating frame 1, and the end of the first pull rod 5 away from the switching device 3 extends to the side of one end of the output rod 201. Two first limiting baffles 501 are spaced apart near one end of the first pull rod 5, and the corresponding section between the two first limiting baffles 501 forms an "I" shape. The first fulcrum portion 401 is located between the two first limiting baffles 501. Two second limiting baffles 2011 are spaced apart at one end of the output rod 201, making that end of the output rod 201 also form an "I" shape. The second fulcrum portion 402 is located between the two second limiting baffles 2011. This utility model uses a first limiting baffle 501 and a second limiting baffle 2011 respectively set on the first pull rod 5 and the output rod 201 to restrict the first fulcrum part 401 and the second fulcrum part 402 within a specific structure. This design ensures that the connection point of the linkage lever 4 with the first pull rod 5 and the output rod 201 is relatively fixed during rotation, making the process of the drive mechanism 2 transmitting power to the switching device 3 through the linkage lever 4 more stable and reliable.

[0044] like Figure 6As shown, the first fulcrum portion 401 has a first arc-shaped protrusion 4011 on both sides facing the two first limiting baffles 501, and the two first arc-shaped protrusions 4011 are respectively used to abut against the two first limiting baffles 501. The second fulcrum portion 402 has a second arc-shaped protrusion 4021 on both sides facing the two second limiting baffles 2011, and the two second arc-shaped protrusions 4021 are respectively used to abut against the two second limiting baffles 2011. In actual production and assembly processes, it is difficult to achieve absolute precision in the dimensions and positions of each component. This utility model, by employing a first arc-shaped protrusion 4011 in cooperation with the first limiting baffle 501 and a second arc-shaped protrusion 4021 in cooperation with the second limiting baffle 2011, has a certain degree of flexibility and can tolerate a certain degree of assembly error or minor displacement during operation. Even if there is a slight deviation in the relative position between the first pull rod 5 and the output rod 201 and the linkage lever 4, the first arc-shaped protrusion 4011 and the second arc-shaped protrusion 4021 can still maintain good contact with the first pull rod 5 and the output rod 201 and transmit power, further improving the reliability and stability of the bypass switch operation.

[0045] Preferably, two linkage levers 4 are provided, symmetrically distributed on both sides of the first pull rod 5 and both sides of the output rod 201. By providing two linkage levers 4, accidental disengagement from the first pull rod 5 and the output rod 201 can be effectively prevented, improving the safety and stability of the entire transmission assembly during operation. Even under conditions of frequent bypass switch operation or certain vibration, it can ensure that the connection between the components is firm and that power transmission is continuously and stably completed.

[0046] See Figure 5 A lever bracket 6 is installed on the inner side of the first fixed plate 101, and one end of each of the two linkage levers 4 is rotatably connected to the lever bracket 6 via a pin 7.

[0047] In this embodiment, the pin 7, the first fulcrum 401 and the second fulcrum 402 are on the same straight line. In this embodiment, the distance between the second fulcrum 402 and the pin 7 is twice the distance between the first fulcrum 401 and the pin 7. That is to say, the lever ratio between the output rod 201 and the first pull rod 5 is 2:1, thereby greatly reducing the force required for the closing drive of the switch device 3.

[0048] Furthermore, the high-reliability bypass switch of this utility model also includes a manual trip lever 8. The other end of the linkage lever 4 is bent at an angle towards the closing drive direction of the drive mechanism 2, and the manual trip lever 8 is fixedly connected to the other end of the linkage lever 4. The configuration of the manual trip lever 8 provides the operator with a way to directly and manually control the bypass switch to trip. The angled bending of the other end of the linkage lever 4 makes the position of the manual trip lever 8 more reasonable, and at the same time, it is more effortless for the manual trip lever 8 to drive the bypass switch to trip via the linkage lever 4.

[0049] See Figure 4 The insulating pull rod assembly also includes an insulator 9 and a second pull rod 10. An embedded nut 15 is integrally molded onto one end of the insulator 9 facing the first pull rod 5, and the other end of the first pull rod 5 is fixedly connected to the embedded nut 15. One end of the second pull rod 10 is integrally molded into the insulator 9, and the other end of the second pull rod 10 away from the insulator 9 is fixedly connected to the moving contact 301 of the switch device 3. Furthermore, a moving conductive busbar 13 is connected to the moving contact 301 of the switch device 3, and the moving conductive busbar 13 is locked and fixed by a locking nut 17 on the second pull rod 10; a stationary conductive busbar 14 is fixedly connected between the stationary contact 302 of the switch device 3 and the second fixed plate 103.

[0050] It is worth mentioning that an insulating baffle 102 is integrally provided in the middle of the insulating frame 1, and an avoidance hole 1021 is opened in the middle of the insulating baffle 102, through which the insulator 9 passes. In this way, the primary main circuit at the high-voltage end (such as the switch device 3, the second pull rod 10, the moving conductor 13 and the stationary conductor 14) is located on the right side of the insulating baffle 102, while the secondary drive circuit at the low-voltage end (such as the drive mechanism 2, the linkage lever 4, the first pull rod 5 and the manual release lever 8) is located on the left side of the insulating baffle 102. The cooperation of the insulating baffle 102 and the insulator 9 completely isolates the primary main circuit and the secondary drive circuit, improves the overall insulation performance of the equipment, reduces the risk of electrical accidents, and ensures the safety of operators and equipment.

[0051] In addition, the high-reliability bypass switch of this utility model also includes a closing spring 11, which is fitted onto the second pull rod 10 and positioned between the insulating baffle 102 and the switching device 3. Simultaneously, the closing spring 11 continuously applies an elastic force to the moving contact 301 towards the stationary contact 302 of the switching device 3. After the switching device 3 is closed, it remains in the closed state by relying on its own self-closing force, the elastic force of the closing spring 11, and the permanent magnet attraction of the drive mechanism 2.

[0052] Continue reading Figure 4 One side of the insulating baffle 102 is provided with a support baffle 16 to provide rigid support for the closing spring 11. The two ends of the closing spring 11 elastically abut against the support baffle 16 and the locking nut 17, respectively. By fitting the closing spring 11 onto the second pull rod 10, and having its elastic force directly act on the insulating frame 1 and the moving end contact 301, this invention not only increases the strength of the insulator 9 but also provides greater contact pressure, completely suppressing the closing bounce phenomenon, extending the service life of the switchgear 3, further improving the reliability of the bypass switch, and ensuring the stability and safety of power transmission.

[0053] See Figure 1 and Figure 2The high-reliability bypass switch of this utility model also includes a housing 12, which includes an outer frame and an end cap on the outer frame. An insulating frame 1 is fixed inside the housing 12, and the moving conductor 13 and the stationary conductor 14 both pass through the housing 12 and extend outward.

[0054] This utility model adopts a two-frame fixing method, namely the insulating frame 1 and the outer shell 12, which has a simple structure and high strength, providing stable support for the internal components, and at the same time can completely isolate the primary main circuit and the secondary drive circuit, thereby enhancing the insulation performance of the equipment.

[0055] In this embodiment, the driving mechanism 2 is a permanent magnet operating mechanism; the switching device 3 is a vacuum switch tube. Both the permanent magnet operating mechanism and the vacuum switch tube are mature existing technologies in the field, and their specific structures, working principles, and operation methods are well known to those skilled in the art, and will not be described in detail here. These existing technology components, combined with other innovative structures and designs described in this utility model, jointly construct this highly reliable bypass switch, enabling it to achieve stable and reliable operation while possessing innovative driving and structural advantages, thanks to the stability and reliability of existing mature technologies.

[0056] Therefore, the high-reliability bypass switch of this utility model, by displacing the output rod 201 of the drive mechanism 2 and the first pull rod 5 of the insulating pull rod assembly in parallel, and achieving transmission between the output rod 201 and the first pull rod 5 through the linkage lever 4, not only reduces the risk of failure due to coaxiality issues, but also simplifies the structure, effectively reduces the number of parts and the difficulty of matching between components, and significantly improves the reliability and stability of the bypass switch. At the same time, the linkage lever 4 can also cleverly reduce the force required by the drive mechanism 2, thereby reducing the size and energy consumption of the drive mechanism 2 to a certain extent and reducing equipment costs. Furthermore, by using the first arc-shaped protrusion 4011 to cooperate with the first limiting baffle 501 and the second arc-shaped protrusion 4021 to cooperate with the second limiting baffle 2011, this utility model has a certain degree of flexibility and can tolerate a certain degree of assembly error or small displacement during operation. Even if there is a small deviation in the relative position between the transmission components, good contact can still be maintained and power can be transmitted, further improving the reliability and stability of the bypass switch. Furthermore, the structural design of the insulating frame 1 in this invention can completely isolate the primary main circuit from the secondary drive circuit, improve the overall insulation performance of the equipment, reduce the risk of electrical accidents, and ensure the safety of operators and equipment.

[0057] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A high-reliability bypass switch, comprising an insulating frame (1), a drive mechanism (2) mounted on the insulating frame (1), and a switching device (3), and a transmission assembly connected between the drive mechanism (2) and the switching device (3); characterized in that: The transmission assembly includes an insulating pull rod assembly and a linkage lever (4). The insulating pull rod assembly is provided with a first pull rod (5), which is offset from and parallel to the output rod (201) of the drive mechanism (2). One end of the linkage lever (4) is hinged to a first fixed plate (101) on the insulating frame (1), and the linkage lever (4) is provided with a first fulcrum (401) and a second fulcrum (402) at intervals from one end to the other. The first fulcrum (401) is movably connected to the first pull rod (5), and the second fulcrum (402) is movably connected to the output rod (201). The drive mechanism (2) is used to drive the output rod (201) to push the linkage lever (4) to rotate, and drive the switch device (3) to close through the insulating pull rod assembly.

2. The high-reliability bypass switch according to claim 1, characterized in that: The first pull rod (5) extends from one end away from the switch device (3) to the side of the corresponding end of the output rod (201), and two first limiting baffles (501) are provided on the first pull rod (5) at intervals, and the first fulcrum (401) is limited between the two first limiting baffles (501); one end of the output rod (201) is provided with two second limiting baffles (2011) at intervals, and the second fulcrum (402) is limited between the two second limiting baffles (2011).

3. The high-reliability bypass switch according to claim 2, characterized in that: The first fulcrum (401) has a first arc-shaped protrusion (4011) on both sides facing the two first limiting baffles (501), and the two first arc-shaped protrusions (4011) are respectively used to abut against the two first limiting baffles (501); the second fulcrum (402) has a second arc-shaped protrusion (4021) on both sides facing the two second limiting baffles (2011), and the two second arc-shaped protrusions (4021) are respectively used to abut against the two second limiting baffles (2011).

4. The high-reliability bypass switch according to claim 1, characterized in that: A lever bracket (6) is installed on the first fixed plate (101), and one end of the linkage lever (4) is rotatably connected to the lever bracket (6) via a pin (7).

5. The high-reliability bypass switch according to claim 4, characterized in that: The pin (7), the first fulcrum (401) and the second fulcrum (402) are on the same straight line, and the other end of the linkage lever (4) is bent at an inclination towards the closing drive direction of the drive mechanism (2).

6. The high-reliability bypass switch according to claim 1, characterized in that: It also includes a hand-separating lever (8), which is fixedly connected to the other end of the linkage lever (4).

7. The high-reliability bypass switch according to claim 1, characterized in that: The insulating pull rod assembly includes an insulator (9) and a second pull rod (10). The insulator (9) is fixedly connected between the first pull rod (5) and the second pull rod (10). The end of the second pull rod (10) away from the insulator (9) is fixedly connected to the moving end contact (301) of the switching device (3).

8. The high-reliability bypass switch according to claim 7, characterized in that: An insulating baffle (102) is integrally provided in the middle of the insulating frame (1), and a clearance hole (1021) is provided in the middle of the insulating baffle (102). The insulator (9) is located in the clearance hole (1021). A closing spring (11) is fitted on the second pull rod (10), and the closing spring (11) is located between the insulating baffle (102) and the switching device (3). At the same time, the closing spring (11) always applies an elastic force to the moving end contact (301) in the direction of the stationary end contact (302) of the switching device (3).

9. The high-reliability bypass switch according to claim 1, characterized in that: It also includes an outer casing (12), the insulating frame (1) is fixed inside the outer casing (12); the switch device (3) is connected to a moving conductor (13) and a stationary conductor (14), both of which pass through the outer casing (12) and extend outward.

10. The high-reliability bypass switch according to claim 1, characterized in that: The drive mechanism (2) is a permanent magnet operating mechanism; the switching device (3) is a vacuum switch tube.

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