Operating mechanism for circuit breaker of gas-insulated switchgear

Abstract

The utility model provides a circuit breaker operating mechanism of a gas insulated switchgear. The circuit breaker operating mechanism comprises an operating mechanism shell, an operating connecting rod, an operating mechanism base and an energy storage spring component, the operating connecting rod is located outside the shell, the energy storage spring is arranged inside the shell, and the closing connecting rod and the opening connecting rod are connected with the open-circuit transmission mechanism. The open-circuit transmission mechanism comprises a cam and a crank arm. A main shaft penetrates through the shell and is connected through a supporting bearing. The device has the advantages that manual energy storage and electric energy storage are combined, and operation is convenient; a reasonable transmission structure ensures effective transmission of energy; a buffer spring and a friction washer reduce impact and abrasion; the compact layout saves space and is convenient to maintain; and the sealing and insulating properties can be improved, the problem of line management is solved, and the reliability, stability and practicability of the operation of the gas-insulated switchgear circuit breaker are improved.

Description

Technical Field

[0001] This utility model relates to the field of gas-insulated switchgear, and more specifically, to an operating mechanism for a gas-insulated switchgear circuit breaker. Background Technology

[0002] Gas-insulated switchgear circuit breakers play a vital role in power systems, and the performance of their operating mechanisms directly affects the normal operation of the circuit breaker and the stability of the power system.

[0003] In existing gas-insulated switchgear operation technologies, most operations rely on manual operation, which is prone to human error. Furthermore, mechanical components experience severe wear and tear during frequent use, leading to reduced accuracy and reliability of opening and closing operations and significantly increasing the risk of malfunctions caused by improper operation. In addition, traditional mechanical operation methods have slow response times and cannot act quickly and accurately upon receiving instructions.

[0004] Regarding transmission support, the existing operating mechanism provides insufficient stability in supporting key rotating components, resulting in significant friction and sway during rotation. This leads to unstable transmission and affects the overall performance of the operating mechanism. Furthermore, the lack of an effective stroke limiting device makes components susceptible to damage due to excessive movement, causing operational errors and reducing the safety of the operating mechanism.

[0005] Regarding buffer protection, existing operating mechanisms often lack reasonable buffer devices. During closing and opening, the energy released by the energy storage spring and the collisions between components generate significant impact forces. This not only accelerates contact wear and shortens contact lifespan but also damages other components of the operating mechanism, reducing the overall stability and reliability of the operating mechanism.

[0006] Furthermore, in existing operating mechanisms, there is a lack of effective friction reduction and buffering measures between the connecting pin and other components. The connecting pin and related components experience significant friction and vibration during operation, accelerating component wear and affecting the smooth operation of the operating mechanism and the service life of the components. Therefore, we propose an improvement to this issue, namely, an operating mechanism for a gas-insulated switchgear circuit breaker. Utility Model Content

[0007] The purpose of this utility model is to address the problems raised in the existing background technology. To achieve the above-mentioned purpose, this utility model provides the following technical solution: an operating mechanism for a gas-insulated switchgear circuit breaker, comprising an operating mechanism housing, an operating linkage, an operating mechanism base, and an energy storage spring. The operating linkage is located outside the operating mechanism housing, the operating mechanism housing is mounted on the operating mechanism base, and the energy storage spring is located inside the operating mechanism housing, with one end connected to the inner wall of the operating mechanism housing. A closing linkage and a opening linkage are provided inside the operating mechanism housing, and the closing linkage and the opening linkage are connected to a circuit breaker transmission mechanism.

[0008] As a preferred technical solution of this utility model, the circuit breaking transmission mechanism includes a cam and a crank arm. The cam is mounted on the main shaft, one end of the crank arm is in contact with the cam, and the other end is connected to the latch through a connecting shaft pin.

[0009] As a preferred technical solution of this utility model, the locking buckle and the release lever are disposed inside the housing of the operating mechanism, and the release lever interacts with the locking buckle.

[0010] As a preferred technical solution of this utility model, it also includes a main shaft, which penetrates through the housing of the operating mechanism and is connected to the housing of the operating mechanism through a support bearing.

[0011] As a preferred technical solution of this utility model, it also includes a friction washer and a limiting block. The friction washer is sleeved on the connecting shaft pin, and the limiting block is installed on the inner wall of the operating mechanism housing.

[0012] As a preferred technical solution of this utility model, it also includes a buffer spring, a tripping spring seat and a closing spring seat. One end of the buffer spring is connected to the tripping spring seat and the other end is connected to the closing spring seat. Both the tripping spring seat and the closing spring seat are installed inside the operating mechanism housing.

[0013] As a preferred technical solution of this utility model, it also includes a rocker arm, an operating connecting plate, and a transmission rod. The rocker arm is connected to the operating connecting plate via a connecting shaft pin, and the operating connecting plate is connected to the transmission rod via a connecting shaft pin.

[0014] As a preferred technical solution of this utility model, it also includes a rotating bracket, a buckle plate, a sliding guide rail, a pull rod joint, a fixed bracket, a tripping electromagnet, and a closing electromagnet. The rotating bracket is installed inside the operating mechanism housing, the buckle plate is connected to the rotating bracket, the sliding guide rail is installed on the inner wall of the operating mechanism housing, the pull rod joint is connected to the transmission pull rod, the fixed bracket is installed on the operating mechanism base, and the tripping electromagnet and the closing electromagnet are installed on the fixed bracket.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention employs a tripping electromagnet and a closing electromagnet to control the tripping and closing operations respectively. The electromagnets have a fast response speed, acting quickly upon receiving tripping or closing commands to achieve accurate tripping and closing control. Compared to traditional mechanical operation methods, electromagnetic drive reduces human error and mechanical wear, improves the reliability and accuracy of tripping and closing, ensures the normal operation of the gas-insulated switchgear circuit breaker, and reduces the risk of failure due to improper operation.

[0017] The main shaft is connected to the operating mechanism housing via a support bearing, providing stable support for the cam's rotation, reducing friction and wobbling during rotation, and ensuring smooth transmission. Limit blocks are installed on the inner wall of the operating mechanism housing, accurately limiting the component's travel distance, preventing damage or operational errors due to excessive movement, and improving the safety and reliability of the operating mechanism.

[0018] The buffer spring connects the opening spring seat and the closing spring seat, playing a crucial buffering role during the opening and closing processes. During closing, the buffer spring absorbs some of the energy released by the energy storage spring, reducing the impact force when the moving contact contacts the stationary contact, decreasing contact wear, and extending contact life. During opening, the buffer spring similarly buffers the energy released during the opening process, reducing collisions and vibrations between components, protecting the various parts of the operating mechanism, and improving the overall stability and reliability of the operating mechanism.

[0019] Friction washers, fitted onto connecting pins, not only reduce friction between the pins and other components, thus lowering wear, but also buffer vibrations. During the operation of the mechanism, the friction washers absorb and disperse some vibration energy, reducing the impact of vibration on components, ensuring smooth operation of the mechanism, and extending the service life of the components. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of the present invention;

[0021] Figure 2 A schematic diagram of the crank arm structure provided by this utility model;

[0022] Figure 3 A schematic diagram of the closing and opening linkage structure provided by this utility model;

[0023] Figure 4 A schematic diagram of the release lever structure provided by this utility model;

[0024] Figure 5 This is a schematic diagram of the limiting block structure provided by this utility model;

[0025] Figure 6 A schematic diagram of the supporting bearing structure provided by this utility model;

[0026] Figure 7 A schematic diagram of the transmission rod structure provided by this utility model;

[0027] Figure 8 A schematic diagram of the sliding guide rail structure provided by this utility model;

[0028] Figure 9 A schematic diagram of the buckle structure provided by this utility model.

[0029] The image shows:

[0030] 1. Operating mechanism housing; 2. Operating linkage; 3. Operating mechanism base; 4. Energy storage spring; 5. Closing linkage; 6. Opening linkage; 7. Cam; 8. Crank arm; 9. Lock; 10. Main shaft; 11. Connecting pin; 12. Tripping lever; 13. Friction washer; 14. Limit stop; 15. Buffer spring; 16. Opening spring seat; 17. Support bearing; 18. Closing spring seat; 19. Rocker arm; 20. Operating plate; 21. Transmission rod; 22. Rotating bracket; 23. Buckle plate; 24. Sliding guide rail; 25. Rod connector; 26. Fixed bracket; 27. Opening electromagnet; 28. Closing electromagnet. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0032] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely illustrates some embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model. It should be noted that, in the absence of conflict, the embodiments and features and technical solutions in the embodiments of this utility model can be combined with each other. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] Example 1: An operating mechanism for a gas-insulated switchgear circuit breaker includes an operating mechanism housing 1, an operating linkage 2, an operating mechanism base 3, and an energy storage spring 4. The operating linkage 2 is located outside the operating mechanism housing 1, and the operating mechanism housing 1 is mounted on the operating mechanism base 3. The energy storage spring 4 is located inside the operating mechanism housing 1, with one end connected to the inner wall of the operating mechanism housing 1. A closing linkage 5 and a opening linkage 6 are provided inside the operating mechanism housing 1, and the closing linkage 5 and the opening linkage 6 are connected to a circuit breaking transmission mechanism. The circuit breaking transmission mechanism includes a cam 7 and a crank arm 8. The cam 7 is mounted on a main shaft 10, and one end of the crank arm 8 contacts the cam 7, while the other end is connected to a latch 9 via a connecting pin 11. The latch 9 and a trip lever 12 are located inside the operating mechanism housing 1, and the trip lever 12 interacts with the latch 9.

[0034] The main shaft 10 passes through the operating mechanism housing 1 and is connected to the operating mechanism housing 1 via a support bearing 17. A friction washer 13 is fitted onto the connecting pin 11, and a limit stop 14 is installed on the inner wall of the operating mechanism housing 1. One end of a buffer spring 15 is connected to the opening spring seat 16, and the other end is connected to the closing spring seat 18. Both the opening spring seat 16 and the closing spring seat 18 are installed inside the operating mechanism housing 1. The rocker arm 19 is connected to the operating connecting plate 20 via a connecting pin 11, and the operating connecting plate 20 is connected to the transmission rod 21 via a connecting pin 11.

[0035] The rotating bracket 22 is installed inside the operating mechanism housing 1. The buckle plate 23 is connected to the rotating bracket 22. The sliding guide rail 24 is installed on the inner wall of the operating mechanism housing 1. The pull rod joint 25 is connected to the transmission pull rod 21. The fixed bracket 26 is installed on the operating mechanism base 3. The opening electromagnet 27 and the closing electromagnet 28 are installed on the fixed bracket 26.

[0036] The working principle of the operating mechanism of the gas-insulated switchgear circuit breaker: The operator performs energy storage operation by operating the operating linkage 2 located on the outside of the operating mechanism housing 1. When the operating linkage 2 rotates, it drives the relevant internal transmission components to move, causing the energy storage spring 4 to be stretched, storing mechanical energy in the energy storage spring 4. One end of the energy storage spring 4 is connected to the inner wall of the operating mechanism housing 1. During the stretching process, the elastic potential energy of the spring continuously increases, providing power for the subsequent closing operation.

[0037] Closing Process: When closing is required, the closing electromagnet 28 is energized. The closing electromagnet 28 is mounted on a fixed bracket 26, which is fixed to the operating mechanism base 3. After the closing electromagnet 28 is activated, it triggers the trip lever 12 to move. The trip lever 12 interacts with the latch 9, causing the latch 9 to unlock. After the latch 9 is unlocked, the energy storage spring 4 releases its elastic potential energy, driving the closing linkage 5 to move. The closing linkage 5 is connected to the circuit breaker transmission mechanism, thereby driving the circuit breaker transmission mechanism to work.

[0038] In the circuit breaker transmission mechanism, cam 7 is mounted on main shaft 10, which passes through the operating mechanism housing 1 and is connected to the operating mechanism housing 1 via support bearing 17. The movement of closing linkage 5 causes cam 7 to rotate around main shaft 10.

[0039] When the cam 7 rotates, it pushes the crank arm 8, which is in contact with it, to move. One end of the crank arm 8 is in contact with the cam 7, and the other end is connected to the latch 9 via the connecting pin 11. The movement of the crank arm 8 is transmitted to other components via the connecting pin 11. The rocker arm 19 is connected to the operating plate 20 via the connecting pin 11, and the operating plate 20 is connected to the transmission rod 21 via the connecting pin 11. The movement of the crank arm 8 sequentially drives the rocker arm 19, the operating plate 20, and the transmission rod 21 to move.

[0040] The transmission rod 21 is connected to the moving contact of the circuit breaker through the rod joint 25. The movement of the transmission rod 21 causes the moving contact of the circuit breaker to move towards the stationary contact, ultimately realizing the closing operation.

[0041] During the closing process, the buffer spring 15 acts as a buffer. One end of the buffer spring 15 is connected to the opening spring seat 16, and the other end is connected to the closing spring seat 18. Both the opening spring seat 16 and the closing spring seat 18 are installed inside the operating mechanism housing 1. When the closing action is nearing completion, the buffer spring 15 can absorb some energy, reduce the impact force during closing, and protect the mechanism components.

[0042] Tripping process: When tripping is required, the tripping solenoid 27 is energized. The tripping solenoid 27 is also mounted on the fixed bracket 26. After the tripping solenoid 27 is activated, it triggers the relevant mechanism to make the trip lever 12 move again, which interacts with the latch 9, putting the mechanism in the tripping preparation state.

[0043] The spring force between the opening spring seat 16 and the closing spring seat 18, as well as the repulsive force between the circuit breaker contacts, causes the circuit breaking transmission mechanism to move in the opposite direction. The cam 7 rotates in the opposite direction, driving the crank arm 8 to move in the opposite direction, which in turn causes the rocker arm 19, the operating connecting plate 20, and the transmission rod 21 to move in the opposite direction.

[0044] The transmission rod 21 drives the moving contact of the circuit breaker to move away from the stationary contact via the rod joint 25, thus realizing the opening operation. The limit stop 14 is installed on the inner wall of the operating mechanism housing 1 to limit the movement stroke of the components, ensuring that the opening operation is performed within the specified range. The friction washer 13 is fitted onto the connecting shaft pin 11 to reduce friction and buffer vibration, ensuring the smoothness of the mechanism's movement. The rotating bracket 22 is installed inside the operating mechanism housing 1, the buckle plate 23 is connected to the rotating bracket 22, and the sliding guide rail 24 is installed on the inner wall of the operating mechanism housing 1. These components work together to ensure the accurate and reliable movement trajectory of the transmission components.

[0045] Operating process of the gas-insulated switchgear circuit breaker operating mechanism: The operator holds the operating linkage 2 located on the outside of the operating mechanism housing 1 and rotates it in a specific direction. One end of the energy storage spring 4 is firmly connected to the inner wall of the operating mechanism housing 1. Driven by the operating linkage 2, the spring is gradually stretched, and its internal elastic potential energy continuously accumulates. As the spring is stretched to the preset energy storage position, the manual energy storage process is completed, reserving sufficient energy for the subsequent closing operation.

[0046] Closing Trigger: When the system issues a closing command, the closing electromagnet 28 is energized. The closing electromagnet 28 is mounted on a fixed bracket 26, which is fixed to the operating mechanism base 3, ensuring the stability of the electromagnet's position. The energized closing electromagnet 28 generates electromagnetic force, pushing the trip lever 12 to move. After the trip lever 12 moves, it interacts with the latch 9, causing the latch 9 to unlock. The unlocking of the latch 9 means that the energy storage spring 4 is released; the spring rapidly contracts, releasing the previously stored elastic potential energy.

[0047] The energy released by the energy storage spring 4 drives the closing linkage 5 to move. The closing linkage 5 is connected to the circuit breaker transmission mechanism, transferring energy to the circuit breaker transmission mechanism.

[0048] In the circuit breaker transmission mechanism, the cam 7 is mounted on the main shaft 10, which passes through the operating mechanism housing 1 and is connected to the operating mechanism housing 1 via the support bearing 17, ensuring the flexibility and stability of the rotation of the main shaft 10. The movement of the closing linkage 5 causes the cam 7 to rotate around the main shaft 10.

[0049] When the cam 7 rotates, its contour pushes the crank arm 8, which is in contact with it, to move. One end of the crank arm 8 is in contact with the cam 7, and the other end is connected to the latch 9 through the connecting shaft pin 11. The crank arm 8 swings under the push of the cam 7.

[0050] The rocker arm 19 is connected to the operating plate 20 via the connecting pin 11, and the operating plate 20 is connected to the transmission rod 21 via the connecting pin 11. The swing of the crank arm 8 sequentially drives the rocker arm 19, the operating plate 20 and the transmission rod 21 to move.

[0051] The transmission rod 21 is connected to the moving contact of the circuit breaker through the rod joint 25. The movement of the transmission rod 21 drives the moving contact to move towards the stationary contact, eventually making the moving contact contact the stationary contact, completing the closing operation, and the circuit is turned on.

[0052] As the closing action nears completion, the buffer spring 15 comes into play. One end of the buffer spring 15 is connected to the opening spring seat 16, and the other end is connected to the closing spring seat 18. Both the opening spring seat 16 and the closing spring seat 18 are installed inside the operating mechanism housing 1. The buffer spring 15 absorbs some of the energy during the closing process, reduces the impact force generated during closing, protects the mechanism components from damage, and extends the service life of the mechanism.

[0053] Tripping Trigger: When the system issues a tripping command, the tripping electromagnet 27 is energized. The tripping electromagnet 27 is mounted on the fixed bracket 26. After being energized, it generates electromagnetic force, which pushes the relevant triggering mechanism, causing the tripping lever 12 to actuate again.

[0054] The action of the trip lever 12 cooperates with the locking latch 9 to put the mechanism in the opening preparation state. At this time, the spring force between the opening spring seat 16 and the closing spring seat 18, as well as the possible repulsive force between the circuit breaker contacts, work together to provide initial power for the opening operation.

[0055] The trip lever 12 and the latch 9 cause the circuit breaker transmission mechanism to move in the opposite direction. The cam 7 rotates in the opposite direction, causing the crank arm 8 to swing in the opposite direction. The reverse swing of the crank arm 8 sequentially causes the rocker arm 19, the operating connecting plate 20, and the transmission rod 21 to move in the opposite direction. The transmission rod 21 drives the moving contact of the circuit breaker to separate from the stationary contact through the rod joint 25, realizing the tripping operation and disconnecting the circuit.

[0056] A limit stop 14 is installed on the inner wall of the operating mechanism housing 1. When the circuit breaker moves to a certain position, the limit stop 14 restricts further movement of the component, ensuring that the circuit breaker operation is carried out within the specified stroke range, thus guaranteeing the accuracy and reliability of the circuit breaker operation. Simultaneously, the friction washer 13, sleeved on the connecting shaft pin 11, reduces friction and buffers vibration, making the circuit breaker operation smoother and reducing component wear and noise. A rotating bracket 22 is installed inside the operating mechanism housing 1, a latch plate 23 is connected to the rotating bracket 22, and a sliding guide rail 24 is installed on the inner wall of the operating mechanism housing 1. These components work together to ensure the accurate movement trajectory of the transmission components during the circuit breaker operation, ensuring the stable operation of the entire operating mechanism.

[0057] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the utility model, are covered within the scope of the claims of the present utility model.

Claims

1. An operating mechanism for a gas-insulated switchgear circuit breaker, characterized in that, The device includes an operating mechanism housing (1), an operating linkage (2), an operating mechanism base (3), and an energy storage spring (4). The operating linkage (2) is located outside the operating mechanism housing (1), and the operating mechanism housing (1) is mounted on the operating mechanism base (3). The energy storage spring (4) is located inside the operating mechanism housing (1), and one end is connected to the inner wall of the operating mechanism housing (1). The operating mechanism housing (1) is provided with a closing linkage (5) and a opening linkage (6). The closing linkage (5) and the opening linkage (6) are connected to the circuit breaker transmission mechanism.

2. The operating mechanism of the gas-insulated switchgear circuit breaker according to claim 1, characterized in that, The circuit breaking transmission mechanism includes a cam (7) and a crank arm (8). The cam (7) is mounted on the main shaft (10). One end of the crank arm (8) is in contact with the cam (7), and the other end is connected to the latch (9) through a connecting pin (11).

3. The operating mechanism of the gas-insulated switchgear circuit breaker according to claim 2, characterized in that, The latch (9) and the release lever (12) are disposed inside the operating mechanism housing (1), and the release lever (12) interacts with the latch (9).

4. The operating mechanism of the gas-insulated switchgear circuit breaker according to claim 3, characterized in that, It also includes a main shaft (10) that passes through the operating mechanism housing (1) and is connected to the operating mechanism housing (1) via a support bearing (17).

5. The operating mechanism of the gas-insulated switchgear circuit breaker according to claim 4, characterized in that, It also includes a friction washer (13) and a limiting block (14), wherein the friction washer (13) is sleeved on the connecting shaft pin (11) and the limiting block (14) is installed on the inner wall of the operating mechanism housing (1).

6. The operating mechanism of the gas-insulated switchgear circuit breaker according to claim 5, characterized in that, It also includes a buffer spring (15), a trip spring seat (16) and a closing spring seat (18). One end of the buffer spring (15) is connected to the trip spring seat (16) and the other end is connected to the closing spring seat (18). The trip spring seat (16) and the closing spring seat (18) are both installed inside the operating mechanism housing (1).

7. The operating mechanism of the gas-insulated switchgear circuit breaker according to claim 6, characterized in that, It also includes a rocker arm (19), an operating connecting plate (20), and a transmission rod (21). The rocker arm (19) is connected to the operating connecting plate (20) via a connecting pin (11), and the operating connecting plate (20) is connected to the transmission rod (21) via a connecting pin (11).

8. The operating mechanism of the gas-insulated switchgear according to claim 7, characterized in that, It also includes a rotating bracket (22), a buckle plate (23), a sliding guide rail (24), a pull rod joint (25), a fixed bracket (26), a tripping electromagnet (27), and a closing electromagnet (28). The rotating bracket (22) is installed inside the operating mechanism housing (1), the buckle plate (23) is connected to the rotating bracket (22), the sliding guide rail (24) is installed on the inner wall of the operating mechanism housing (1), the pull rod joint (25) is connected to the transmission pull rod (21), the fixed bracket (26) is installed on the operating mechanism base (3), and the tripping electromagnet (27) and the closing electromagnet (28) are installed on the fixed bracket (26).

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