Manual switch-on and switch-off protection mechanism based on high-voltage circuit breaker and high-voltage circuit breaker

Abstract

The utility model relates to the technical field of high-voltage circuit breakers, in particular to a manual switching-on and switching-off protection mechanism based on a high-voltage circuit breaker and the high-voltage circuit breaker, and the manual switching-on and switching-off protection mechanism comprises a switching-off half shaft, a carrier, a switching-on and switching-off operation handle, a travel switch, a transmission part and a limiting assembly. The travel switch is used for disconnecting the remote control system, the transmission piece is fixedly arranged on a transmission shaft of the opening and closing operation handle, and the transmission piece is provided with a limiting part and a driving part; the limiting assembly comprises a concave block and a spring, a limiting groove is formed in the side, close to the limiting part, of the concave block, when the opening and closing operation handle rotates in the opening direction and the transmission piece rotates along with the opening direction, the limiting part of the transmission piece is clamped in the limiting groove, the driving part of the transmission piece moves to the state that the driving part touches and presses the travel switch, and the spring forces the concave block to press the limiting part. In the application, a worker manually controls the high-voltage circuit breaker to be switched off, and meanwhile, a remote control switching-on and switching-off system of the high-voltage circuit breaker is switched off, so that the safety protection performance of the high-voltage circuit breaker is enhanced.

Description

A manual opening and closing protection mechanism based on a high-voltage circuit breaker and the high-voltage circuit breaker Technical Field

[0001] This application relates to the field of high-voltage circuit breaker technology, and in particular to a manual opening and closing protection mechanism based on a high-voltage circuit breaker and a high-voltage circuit breaker. Background Technology

[0002] High-voltage circuit breakers have two operating modes: manual control and remote control. These two modes operate independently. Manual control mode: The operator manually rotates the operating handle, which in turn rotates the opening half-shaft, controlling the opening of the high-voltage circuit breaker. Remote control mode: The remote control system controls the operation of the opening electromagnet, which applies force to the opening half-shaft to control the opening of the high-voltage circuit breaker.

[0003] When the power system needs to be partially shut down for maintenance, the staff first disconnects the remote control operating system by using an external limit switch; then the staff manually rotates the opening and closing operating handle of the high-voltage circuit breaker to put the opening half shaft in the open state; after that, the staff then carry out maintenance on the power system in that area.

[0004] During the manual opening of a high-voltage circuit breaker, the operator may forget to disconnect the remote control operating system via the limit switch, and other maintenance personnel may remotely control the high-voltage circuit breaker to close it without their knowledge, which could lead to a safety accident. Summary of the Invention

[0005] In order to enhance the safety protection performance of high-voltage circuit breakers and reduce the occurrence of safety accidents, this application provides a manual opening and closing protection mechanism based on a high-voltage circuit breaker and a high-voltage circuit breaker.

[0006] This application provides a manual opening and closing protection mechanism based on a high-voltage circuit breaker and a high-voltage circuit breaker, which adopts the following technical solution:

[0007] A manual opening and closing protection mechanism based on a high-voltage circuit breaker includes an opening half-shaft, a carrier, and an opening and closing operating handle; it also includes a limit switch, a transmission component, and a limit assembly; the limit switch is used to disconnect the connection of a remote control system; the transmission component is fixed on the transmission shaft of the opening and closing operating handle, and the transmission component has a limiting part and a driving part; the limit assembly is disposed on the moving path of the limiting part, and the limit assembly includes a concave block and a spring; the concave block is rotatably connected to the carrier, and the concave block has a limiting groove on the side near the limiting part, the limiting groove being used to accommodate the limiting part; when the opening and closing operating handle rotates in the opening direction and the transmission component rotates accordingly, the limiting part of the transmission component moves to a state where it is locked in the limiting groove, the driving part of the transmission component moves to a state where it presses the limit switch, and the spring forces the concave block to press the limiting part to prevent the rotation of the transmission component.

[0008] By adopting the above technical solution, when the operator manually rotates the opening and closing operating handle, the handle rotates in the opening direction. The handle drives the opening half-shaft to rotate, thereby controlling the opening of the high-voltage circuit breaker. At this time, the limiting part of the transmission component is engaged in the limiting groove. Under the rebound force of the spring, the groove presses downward against the limiting part, preventing the transmission component from resetting and keeping the opening and closing operating handle in the open state. This reduces the risk of accidental closing of the high-voltage circuit breaker by operators, improves the safety protection performance of the high-voltage circuit breaker, and enhances the safety of power maintenance operations.

[0009] Simultaneously, the drive component on the transmission mechanism presses the limit switch to shut down the remote operation tripping system. This means that other maintenance personnel can no longer remotely control the high-voltage circuit breaker to close it, further improving the safety of workers when inspecting the power system.

[0010] At this time, the external opening and closing operating handle of the high-voltage circuit breaker is always in the tilted open position, serving as a reminder to on-site personnel. Furthermore, placing the limit switch inside the carrier makes the various structures more compact; the carrier also protects the limit switch, extending its service life.

[0011] In summary, by coordinating the transmission components and limit switches, the manual control opening and closing system and the remote control opening and closing system of the high-voltage circuit breaker are integrated. This allows operators to manually open the high-voltage circuit breaker while simultaneously disconnecting the remote control operating system, thereby enhancing the safety performance of the high-voltage circuit breaker and reducing the occurrence of safety accidents.

[0012] Optionally, it also includes a linkage component, which is disposed between the drive unit and the limit switch; the drive unit presses the limit switch through the linkage component.

[0013] By adopting the above technical solution, the drive unit squeezes the limit switch through the linkage component to close the remote operation opening and closing system, thereby improving the sensitivity of the limit switch response.

[0014] Optionally, the linkage component includes a guide post and a linkage slide plate. The linkage slide plate has an oblong hole, and the guide post passes through the oblong hole and is fixedly connected to the carrier. At least two guide posts are provided, so that the linkage slide plate slides towards or away from the limit switch. When the opening and closing operation handle is rotated towards the opening direction and the transmission component rotates accordingly, the driving part of the transmission component pushes the linkage slide plate to slide towards the limit switch, so that the linkage slide plate touches the limit switch.

[0015] By adopting the above technical solution, the drive unit forces the linkage slide plate close to the limit switch until the drive unit forces the linkage slide plate to squeeze the limit switch, thereby shutting down the remote operating system.

[0016] Optionally, the drive unit has a second roller, and the two ends of the linkage slide plate along its own sliding direction are respectively provided with a first abutting plate and a second abutting plate. The first abutting plate is used for the second roller to abut, and the second abutting plate is used to press the contacts of the limit switch.

[0017] By adopting the above technical solution, when the drive unit drives the linkage slide plate to move, the second roller is connected to the linkage slide plate in a rolling manner, so that the drive unit can drive the linkage slide plate to slide.

[0018] Optionally, the limiting part has a first roller, and the concave block has an arc-shaped transition section; when the transmission member rotates with the opening and closing operation handle in the direction of opening, the first roller first abuts against the arc-shaped transition section and forces the concave block to rotate away from the transmission member, and the spring continues to compress until the first roller moves to the position corresponding to the limiting groove, and the spring forces the inner wall of the limiting groove of the concave block to press against the limiting part to prevent the rotation of the transmission member.

[0019] By adopting the above technical solution, the first roller and the arc-shaped transition section work together to facilitate the first roller being locked in the limiting groove, thereby improving the stability of the connection between the limiting component and the transmission component.

[0020] Optionally, it also includes a tripping electromagnet and a rotating assembly. The rotating assembly includes a rotating component and a second torsion spring. The rotating component is fixed to the tripping half-shaft, and the second torsion spring is sleeved on the tripping half-shaft. The second torsion spring is used to force the rotating component to rotate and reset. The tripping electromagnet drives the tripping half-shaft to rotate to the tripping state by striking the rotating component. The rotating component is located on the moving path of the limiting part. When the tripping operation handle is rotated in the tripping direction and the transmission component rotates accordingly, the movement of the limiting part of the transmission component will drive the rotating component and the tripping half-shaft to rotate until the tripping half-shaft is in the tripping state, and the limiting part is engaged in the limiting groove.

[0021] By adopting the above technical solution, when the opening and closing operation handle is rotated in the opening direction, the transmission component rotates and abuts against the rotating component, and the transmission component forces the rotating component to rotate together; thus, when the limit component fixes the position of the transmission component, the transmission component also temporarily fixes the position of the rotating component, so that the opening half shaft is in the opening state, preventing the opening half shaft from resetting, and further enhancing the safety protection performance of the high voltage circuit breaker.

[0022] Optionally, the rotating component includes a first rotating arm and a second rotating arm connected to each other, with an included angle between the first rotating arm and the second rotating arm; the limiting part is located in the included angle region between the first rotating arm and the second rotating arm, the first rotating arm is located on the path of the limiting part moving along the opening direction, and a clearance distance is provided between the second rotating arm and the limiting part.

[0023] By adopting the above technical solution, a clearance distance is provided between the second rotating arm and the transmission component, so that when the opening electromagnet applies force to the second rotating arm to realize the opening and closing of the high-voltage circuit breaker, the interference of the rotating component to the transmission component can be reduced.

[0024] Optionally, a clearance distance is provided between the first rotating arm and the limiting part.

[0025] By adopting the above technical solution, under normal conditions, there is a clearance distance between the first rotating arm and the transmission component to reduce the interference of the transmission component 21 on the rotating component 41.

[0026] Optionally, it also includes a first torsion spring, which is sleeved on the drive shaft and is used to force the transmission component to rotate and reset.

[0027] By adopting the above technical solution, the first torsion spring provides a limiting effect on the transmission component, thereby improving the stability of the position of the transmission component and the transmission shaft.

[0028] A high-voltage circuit breaker includes any of the above-mentioned manual opening and closing protection mechanisms.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. By coordinating the transmission components and limit components, the manual control opening and closing system and the remote control opening and closing system in the high-voltage circuit breaker are integrated; this allows the operator to manually open the high-voltage circuit breaker while simultaneously disconnecting the remote control operating system, thereby enhancing the safety protection performance of the high-voltage circuit breaker and reducing the occurrence of safety accidents.

[0031] 2. The drive unit presses the limit switch through the linkage component to close the remote operation opening and closing system, thereby improving the sensitivity of the limit switch response;

[0032] 3. Through the coordinated cooperation between the first roller and the arc-shaped transition section, the first roller is easily engaged in the limiting groove, thereby improving the stability of the connection between the limiting component and the transmission component. Attached Figure Description

[0033] Figure 1 is a schematic diagram of the manual opening and closing protection mechanism under normal conditions in Example 1.

[0034] Figure 2 is an enlarged view of point A in Figure 1.

[0035] Figure 3 is a schematic diagram of the manual opening and closing protection mechanism in the closed state in Embodiment 1.

[0036] Figure 4 is an enlarged view of point B in Figure 3.

[0037] Figure 5 is a schematic diagram of the manual opening and closing protection mechanism in the open state in Embodiment 1.

[0038] Figure 6 is an enlarged view of point C in Figure 5.

[0039] Explanation of reference numerals in the attached drawings: 1. Carrier; 11. Half-shaft for tripping; 12. Drive shaft; 13. Limit switch; 14. Tripping electromagnet; 2. Transmission assembly; 21. Transmission component; 211. Limiting part; 212. Drive part; 213. First roller; 214. Second roller; 22. First torsion spring; 3. Limiting assembly; 31. Concave block; 311. Limiting groove; 312. Arc-shaped transition section; 32. Spring; 4. Rotating assembly; 41. Rotating component; 411. First rotating arm; 412. Second rotating arm; 42. Second torsion spring; 43. Limiting rod; 5. Linkage assembly; 51. Guide post; 52. Linkage sliding plate; 521. Waist-shaped hole; 522. First abutment plate; 523. Second abutment plate. Detailed Implementation

[0040] The present application will be further described in detail below with reference to Figures 1-6.

[0041] This application discloses a manual opening and closing protection mechanism based on a high-voltage circuit breaker. Referring to Figures 1 and 2, the manual opening and closing protection mechanism includes a carrier 1, an opening half-shaft 11, an opening and closing operating handle, a limit switch 13, a transmission assembly 2, a rotation assembly 4, and a limit assembly 3.

[0042] Referring to Figures 1 and 2, the carrier 1 can be a plate-like structure, with the opening / closing operating handle, opening half-shaft 11, limit switch 13, transmission assembly 2, rotation assembly 4, and limit assembly 3 mounted on the carrier 1. In this embodiment, the carrier 1 is the plate-like housing of a high-voltage circuit breaker. Furthermore, placing the limit switch 13 inside the carrier 1 makes the various structures more compact; and the carrier 1 provides protection for the limit switch 13, extending its service life.

[0043] Referring to Figures 1 and 2, the drive shaft 12 and the half-shaft 11 of the opening and closing operation handle are rotatably connected to the carrier 1. The operator manually rotates the opening and closing operation handle, which drives the half-shaft 11 to rotate. Thus, the rotation of the half-shaft 11 is used to control the opening of the high-voltage circuit breaker. The above operation mode is the manual control opening and closing operation mode of the high-voltage circuit breaker.

[0044] Referring to Figures 1 and 2, the limit switch 13 is used to disconnect the remote control system. The remote control system controls the driving component in the high-voltage circuit breaker to apply force to the tripping half-shaft 11 to control the opening and closing of the high-voltage circuit breaker. The above operating mode is the remote control opening and closing operation mode of the high-voltage circuit breaker.

[0045] Referring to Figures 1 and 2, in this embodiment, the opening and closing operation handle drives the opening half shaft 11 to rotate through the coordinated cooperation of the transmission component 2 and the rotation component 4, thereby controlling the opening of the high-voltage circuit breaker by rotating the opening half shaft 11.

[0046] Referring to Figures 1 and 2, the transmission assembly 2 includes a transmission member 21 and a first torsion spring 22. The transmission member 21 is fixed on the transmission shaft 12 of the opening and closing operation handle, and the transmission member 21 and the opening and closing operation handle rotate together. The first torsion spring 22 is sleeved on the transmission shaft 12 and is used to force the transmission member 21 to rotate and reset, so as to improve the stability of the position of the transmission member 21 and the transmission shaft 12.

[0047] Referring to Figures 1 and 2, the transmission member 21 has a limiting part 211 and a driving part 212. The limiting part 211 has a first roller 213 and the driving part 212 has a second roller 214. In this embodiment, the first roller 213 and the second roller 214 are disposed on the same side.

[0048] Referring to Figures 3 and 4, the rotating assembly 4 includes a rotating member 41, a second torsion spring 42, and a limiting rod 43. The rotating member 41 is fixed to the opening half-shaft 11, and the second torsion spring 42 is sleeved on the opening half-shaft 11. The second torsion spring 42 is used to force the rotating member 41 to rotate and reset. Specifically, the rotating member 41 includes a first rotating arm 411 and a second rotating arm 412 connected to each other, with an included angle between the first rotating arm 411 and the second rotating arm 412. In this embodiment, the first rotating arm 411 and the second rotating arm 412 are integrally formed. The limiting part 211 of the transmission member 21 is located in the included angle region between the first rotating arm 411 and the second rotating arm 412. The first rotating arm 411 is located on the path along which the limiting part 211 moves in the opening direction. There is a clearance distance between the second rotating arm 412 and the limiting part 211, and there is also a clearance distance between the second rotating arm 412 and the transmission member 21. The limiting rod 43 is fixed on the carrier 1, and the limiting rod 43 is located on the side of the second rotating arm 412 away from the first rotating arm 411. The limiting rod 43 abuts against the second rotating arm 412 to limit the position of the rotating part 41.

[0049] Referring to Figures 5 and 6, when the transmission component 21 rotates with the opening and closing operation handle in the direction of opening, the limiting part 211 of the transmission component 21 presses against the first rotating arm 411 to drive the opening half shaft 11 to rotate, thereby using the rotation of the opening half shaft 11 to control the opening of the high-voltage circuit breaker.

[0050] In other embodiments, the opening and closing operating handle can also directly drive the opening half-shaft 11 to rotate. For example, the opening and closing operating handle has a swing arm on the drive shaft 12 and a striking plate on the opening half-shaft 11; when the opening and closing operating handle rotates in the opening direction, the swing arm on the drive shaft 12 faces the half-shaft of the opening half-shaft 11, and the swing arm contacts the striking plate. The swing arm drives the striking plate and the opening half-shaft 11 to rotate, thereby causing the high-voltage circuit breaker to open.

[0051] Referring to Figures 3 and 4, in this embodiment, the driving component of the high-voltage circuit breaker is a tripping electromagnet 14, which is mounted on the carrier 1. The remote control system controls the tripping electromagnet 14 to strike the second rotating arm 412, thereby driving the tripping half-shaft 11 to rotate to the tripping state.

[0052] Referring to Figures 5 and 6, in this embodiment, when the transmission member 21 rotates with the opening and closing operation handle in the direction of opening, the drive part 212 of the transmission member 21 presses the limit switch 13, causing the limit switch 13 to disconnect the remote control system.

[0053] Referring to Figures 1 and 2, in this embodiment, the linkage component 5 is disposed between the drive unit 212 and the limit switch 13. The drive unit 212 presses the limit switch 13 through the linkage component 5. Specifically, the linkage component 5 includes a guide post 51 and a linkage slide plate 52. The linkage slide plate 52 has an oblong hole 521. The guide post 51 passes through the oblong hole 521 and is fixedly connected to the carrier 1. At least two guide posts 51 are provided, so that the linkage slide plate 52 slides towards or away from the limit switch 13. In this embodiment, the two ends of the linkage slide plate 52 along its own sliding direction are respectively provided with a first abutment plate 522 and a second abutment plate 523. The first abutment plate 522 is used for the second roller 214 to abut against, and the second abutment plate 523 is used to press the contact of the limit switch 13.

[0054] Referring to Figures 5 and 6, when the opening and closing operation handle is rotated toward the opening direction and the transmission component 21 rotates accordingly, the second roller 214 of the transmission component 21 pushes the linkage slide plate 52 to slide along the direction close to the limit switch 13, so that the linkage slide plate 52 touches the limit switch 13.

[0055] In other embodiments, the distance between the contacts of the limit switch 13 and the drive part 212 of the rotating member 41 is small. When the drive part 212 of the transmission member 21 rotates with the opening and closing operation handle, the drive part 212 of the transmission member 21 directly presses the contacts of the limit switch 13 to disconnect the connection of the remote control system.

[0056] Referring to Figures 1 and 2, the limiting component 3 is disposed on the moving path of the limiting part 211. The limiting component 3 includes a recess 31 and a spring 32. The recess 31 is rotatably connected to the carrier 1, and a limiting groove 311 is provided on the side of the recess 31 near the limiting part 211. The limiting groove 311 is used to accommodate the limiting part 211. In this embodiment, the recess 31 is provided with an arc-shaped transition section 312.

[0057] Referring to Figures 5 and 6, when the transmission component 21 rotates with the opening and closing operation handle in the direction of opening, the first roller 213 first abuts against the arc-shaped transition section 312 and forces the concave block 31 to rotate away from the transmission component 21. The spring 32 continues to compress until the first roller 213 moves to the position of the corresponding limiting groove 311. The spring 32 forces the inner wall of the limiting groove 311 of the concave block 31 to press against the limiting part 211 to prevent the transmission component 21 from rotating.

[0058] When the limiting part 211 of the transmission member 21 moves to the state where it is locked in the limiting groove 311, the limiting part 211 of the transmission member 21 forces the opening half shaft 11 to be in the opening state; and the driving part 212 of the transmission member 21 moves to the state where it touches the limit switch 13 to disconnect the connection of the remote control system; at this time, the spring 32 forces the concave block 31 to press the limiting part 211 to prevent the transmission member 21 from rotating.

[0059] At this time, the opening and closing operation handle on the outside of the high-voltage circuit breaker is always in the tilted opening position, which serves as a reminder to the on-site personnel.

[0060] The implementation principle of a high-voltage circuit breaker in this embodiment is as follows:

[0061] Referring to Figures 5 and 6, when the operator manually rotates the opening and closing operation handle, the handle rotates towards the opening direction. This rotation drives the opening half-shaft 11 to rotate, thereby controlling the opening of the high-voltage circuit breaker. At this time, the limiting part 211 of the transmission component 21 is engaged in the limiting groove 311. Under the rebound force of the spring 32, the recess 31 presses downwards against the limiting part 211 to prevent the transmission component 21 from resetting, thus placing the opening and closing operation handle in the open state. This reduces the risk of accidental closing of the high-voltage circuit breaker by the operator, improves the safety protection performance of the high-voltage circuit breaker, and enhances the operational safety of power maintenance.

[0062] Referring to Figure 5, simultaneously, the drive component on the transmission component 21 presses the limit switch 13 to close the remote operation tripping system. This means that other maintenance personnel can no longer remotely control the high-voltage circuit breaker to close it, further improving the safety of workers during power system maintenance.

[0063] In summary, by coordinating the transmission component 21 and the limit component 3, the manual control opening and closing system and the remote control opening and closing system in the high-voltage circuit breaker are integrated. This allows the operator to manually open the high-voltage circuit breaker while simultaneously disconnecting the remote control operating system, thereby enhancing the safety protection performance of the high-voltage circuit breaker and reducing the occurrence of safety accidents.

[0064] Example 2

[0065] This embodiment discloses a high-voltage circuit breaker, including the manual opening and closing protection mechanism in Embodiment 1.

[0066] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A manual opening and closing protection mechanism based on a high-voltage circuit breaker, comprising an opening half-shaft (11), a carrier (1), and an opening and closing operating handle; characterized in that: The system includes a limit switch (13), a transmission component (21), and a limit assembly (3). The limit switch (13) is used to disconnect the remote control system. The transmission component (21) is fixed on the transmission shaft (12) of the opening and closing operating handle. The transmission component (21) has a limiting part and a driving part. The limit assembly (3) is located on the moving path of the limiting part. The limit assembly (3) includes a recess (31) and a spring (32). The recess (31) is rotatably connected to the carrier (1), and the recess (31)... A limiting groove (311) is provided on the side near the limiting part. The limiting groove (311) is used to accommodate the limiting part. When the opening and closing operation handle is rotated in the opening direction and the transmission member (21) rotates accordingly, the limiting part of the transmission member (21) moves to the state where it is locked in the limiting groove (311). The driving part of the transmission member (21) moves to the state where it touches the limit switch (13). The spring (32) forces the concave block (31) to press the limiting part to prevent the transmission member (21) from rotating.

2. The high voltage circuit breaker based manual opening and closing protection mechanism according to claim 1, characterized in that: It also includes a linkage component (5), which is disposed between the drive unit and the limit switch (13); the drive unit presses the limit switch (13) through the linkage component (5).

3. The high voltage circuit breaker based manual opening and closing protection mechanism according to claim 2, characterized in that: The linkage component (5) includes a guide post (51) and a linkage slide plate (52). The linkage slide plate (52) has an oblong hole (521). The guide post (51) passes through the oblong hole (521) and is fixedly connected to the carrier (1). At least two guide posts (51) are provided so that the linkage slide plate (52) slides in the direction of approaching or moving away from the limit switch (13). When the opening and closing operation handle is rotated in the direction of opening and the transmission component (21) rotates accordingly, the driving part of the transmission component (21) pushes the linkage slide plate (52) to slide in the direction of approaching the limit switch (13) so that the linkage slide plate (52) touches the limit switch (13).

4. The manual opening and closing protection mechanism based on a high-voltage circuit breaker according to claim 3, characterized in that: The drive unit has a second roller (214), and the two ends of the linkage slide plate (52) along its own sliding direction are respectively provided with a first abutting plate (522) and a second abutting plate (523). The first abutting plate (522) is used for the second roller (214) to abut, and the second abutting plate (523) is used to press the contact of the limit switch (13).

5. The high voltage circuit breaker based manual opening and closing protection mechanism according to claim 1, characterized in that: The limiting part has a first roller (213), and the concave block (31) has an arc-shaped transition section (312). When the transmission member (21) rotates with the opening and closing operation handle in the direction of opening, the first roller (213) first abuts against the arc-shaped transition section (312) and forces the concave block (31) to rotate away from the transmission member (21). The spring (32) continues to compress until the first roller (213) moves to the position corresponding to the limiting groove (311). The spring (32) forces the inner wall of the limiting groove (311) of the concave block (31) to press against the limiting part to prevent the transmission member (21) from rotating.

6. The high voltage circuit breaker based manual opening and closing protection mechanism according to claim 1, characterized in that: It also includes a tripping electromagnet (14) and a rotating assembly (4). The rotating assembly (4) includes a rotating component (41) and a second torsion spring (42). The rotating component (41) is fixed to the tripping half shaft (11), and the second torsion spring (42) is sleeved on the tripping half shaft (11). The second torsion spring (42) is used to force the rotating component (41) to rotate and reset. The tripping electromagnet (14) drives the tripping half shaft (11) to rotate to the tripping state by striking the rotating component (41). The rotating component (41) is located on the moving path of the limiting part. When the tripping operation handle rotates toward the tripping direction and the transmission component (21) rotates accordingly, the movement of the limiting part of the transmission component (21) will drive the rotating component (41) and the tripping half shaft (11) to rotate until the tripping half shaft (11) is in the tripping state and the limiting part is locked in the limiting groove (311).

7. The high voltage circuit breaker based manual opening and closing protection mechanism according to claim 6, characterized in that: The rotating component (41) includes a first rotating arm (411) and a second rotating arm (412) connected to each other, with an included angle between the first rotating arm (411) and the second rotating arm (412); the limiting part is located in the included angle region between the first rotating arm (411) and the second rotating arm (412), the first rotating arm (411) is located on the path of the limiting part moving along the opening direction, and the second rotating arm (412) is provided with a clearance distance from the limiting part.

8. The manual opening and closing protection mechanism based on a high-voltage circuit breaker according to claim 7, characterized in that: A clearance distance is provided between the first rotating arm (411) and the limiting part.

9. The manual opening and closing protection mechanism based on a high-voltage circuit breaker according to claim 1, characterized in that: It also includes a first torsion spring (22), which is sleeved on the transmission shaft (12) and is used to force the transmission component (21) to rotate and reset.

10. A high voltage circuit breaker characterized by: Includes any one of the manual opening and closing protection mechanisms according to claims 1-9.

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