A kind of opening and closing mechanism for vacuum circuit breaker

Abstract

The utility model relates to the field of vacuum circuit breaker, concretely relates to a kind of opening and closing mechanism for vacuum circuit breaker, including opening and closing frame, the main body for the opening and closing of vacuum circuit breaker, vacuum circuit breaker body, fixedly installed in the outside of opening and closing frame, for carrying out vacuum arc extinguishing, and the outside of vacuum circuit breaker body is fixedly installed with vacuum contact arc chamber.This utility model is provided with knife gap piece, opening and closing board, driving shaft, opening and closing handle, abutting frame, spring rod, opening and closing cover plate and fastening screw rod, when using the opening and closing mechanism of the vacuum circuit breaker, by the rotation of driving shaft that opening and closing handle rotates, so that spring rod is pressed downward, then the rotation of driving shaft, let opening and closing board separate knife gap piece, to complete the opening and closing operation of vacuum circuit breaker, then after opening, fastening screw rod can be twisted, opening and closing cover plate is rotated, let opening and closing cover plate be set in the recess of opening and closing handle, fastening screw rod is tightened again, so opening and closing state can be determined.

Description

Technical Field

[0001] This utility model relates to the field of vacuum circuit breakers, and specifically to a switching mechanism for vacuum circuit breakers. Background Technology

[0002] A vacuum circuit breaker is a high-voltage switchgear that uses vacuum as the arc-extinguishing medium. Its core component is the vacuum interrupter. When the contacts are disconnected in a vacuum, the arc is quickly extinguished. Because of the high insulation strength and fast recovery speed of vacuum, vacuum circuit breakers are widely used in power systems for controlling and protecting circuits, especially in medium and high voltage applications. The opening and closing mechanism is the mechanical system in a vacuum circuit breaker responsible for operating the opening and closing of the contacts. It mainly includes the operating mechanism, transmission system, buffer device, and other parts.

[0003] The opening and closing mechanisms of existing vacuum circuit breakers lack the ability to stably lock the opening state during use. This means that after opening, the state is maintained solely by spring force or electromagnet, which can easily lead to accidental closing due to vibration, impact, or electromagnetic interference, causing short circuits or arc burns. Furthermore, after long-term use, spring fatigue or electromagnet failure can cause a decrease in the opening holding force, and the opening state may recover on its own, resulting in equipment malfunction.

[0004] Therefore, it is necessary to invent a switching mechanism for vacuum circuit breakers to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a closing and opening mechanism for a vacuum circuit breaker. Through a knife switch, a closing plate, a drive shaft, a closing and opening handle, a contact frame, a spring rod, a closing and opening sleeve, and a fastening screw, the closing and opening mechanism of the vacuum circuit breaker achieves a stable locking capability in the open state. This forms a double insurance mechanism, significantly improving the reliability of the opening operation. Furthermore, the locking mechanism prevents unauthorized personnel from misoperating, reducing the risk of electric shock. It eliminates the need for complex electronic interlocks or sensors, achieving locking solely through a mechanical structure, thus reducing manufacturing costs and maintenance difficulty. This addresses the problem in existing vacuum circuit breaker closing and opening mechanisms where the lack of stable locking capability in the open state leads to reliance on spring force or electromagnets to maintain the state after opening. This makes the mechanism susceptible to accidental closing due to vibration, impact, or electromagnetic interference, potentially causing short circuits or arc burns. Moreover, long-term use can lead to spring fatigue or electromagnet failure, resulting in a decrease in the opening holding force and the possibility of the open state reverting to its original state, causing equipment malfunction.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a switching mechanism for a vacuum circuit breaker, comprising a switching frame and a main body for switching the vacuum circuit breaker; The vacuum circuit breaker body is fixedly installed on the outside of the opening and closing frame for vacuum arc extinguishing. Vacuum contact arc extinguishing chambers are fixedly installed on the outside of the vacuum circuit breaker body. Knife switch plates are fixedly installed at the front end of the vacuum contact arc extinguishing chambers. Insulating cylinders are fixedly installed on the lower outside of the opening and closing frame. A drive shaft is rotatably connected to the outside of the insulating cylinder. A tripping plate is fixedly installed on the outside of the drive shaft. Contact magnetic plates are fixedly installed on both sides inside the switch plate for contacting the knife switch piece for opening and closing. The switch frame is rotatably connected to a drive shaft. The two ends of the drive shaft are fixedly installed with switch handles. The outside of the switch handles is hinged with a contact frame. The lower outside of the switch frame is fixedly installed with a fixing plate. The upper part of the fixing plate is fixedly installed with a spring rod. The socket plate is fixedly installed on both sides of the opening and closing mechanism frame to stabilize the opening and closing state. The socket plate is rotatably connected to the outside of the movable shaft. The opening and closing sleeve plate is fixedly installed on the outside of the movable shaft, and the external thread of the movable shaft is through a fastening screw.

[0007] Preferably, the insulating cylinder is rotatably connected to the switch plate, and the knife switch piece is used in conjunction with the switch plate.

[0008] Preferably, a transmission rod is fixedly mounted on the outside of the drive shaft, and a connecting frame is hinged to the front end of the transmission rod.

[0009] Preferably, a bracket insulator is fixedly installed on the outside of the connecting frame, and the tail end of the bracket insulator is hinged to the inside of the switch plate.

[0010] Preferably, an indicator is fixedly installed at the front end of the opening / closing handle, and an opening / closing indicator is fixedly installed on the outside of the vacuum circuit breaker body.

[0011] Preferably, the top end of the spring rod is hinged to the abutment frame, and the opening / closing handle is rotatably connected to the opening / closing gate frame.

[0012] The technical effects and advantages provided by this utility model in the above technical solution are as follows: This utility model includes a knife switch piece, a trip plate, a drive shaft, a trip handle, a contact frame, a spring rod, a trip sleeve, and a fastening screw. When using the trip mechanism of this vacuum circuit breaker, rotating the drive shaft via the trip handle presses the spring rod downwards. The rotation of the drive shaft then disengages the trip plate from the knife switch piece, thus completing the tripping operation of the vacuum circuit breaker. After tripping, the fastening screw can be turned to rotate the trip sleeve, allowing it to fit into the groove of the trip handle. Tightening the fastening screw again confirms the tripping state and ensures its stability. This gives the vacuum circuit breaker's tripping mechanism the ability to stably lock the tripping state, forming a double insurance mechanism that significantly improves the reliability of the tripping operation. Furthermore, the locking mechanism prevents unauthorized personnel from misoperating, reducing the risk of electric shock. It also eliminates the need for complex electronic interlocks or sensors, achieving locking solely through a mechanical structure, thus reducing manufacturing costs and maintenance difficulty. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the gate structure of this utility model; Figure 3 This is a schematic diagram of the support insulator structure of this utility model; Figure 4 This is a schematic diagram of the opening and closing handle structure of this utility model; Figure 5 This is a schematic diagram of the split-and-assemble sleeve structure of this utility model.

[0015] Explanation of reference numerals in the attached figures: 1. Opening / closing mechanism frame; 2. Vacuum circuit breaker body; 3. Vacuum contact arc-extinguishing chamber; 4. Knife switch piece; 5. Insulating cylinder; 6. Drive shaft; 7. Opening plate; 8. Contact magnetic plate; 9. Drive shaft; 10. Drive rod; 11. Connecting frame; 12. Support insulator; 13. Opening / closing handle; 14. Indicator; 15. Opening / closing indicator; 16. Contact frame; 17. Fixing plate; 18. Spring rod; 19. Sleeve plate; 20. Movable shaft; 21. Opening / closing sleeve plate; 22. Fastening screw. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0017] This utility model provides, for example Figure 1-5 The shown is a switching mechanism for a vacuum circuit breaker, including a switching frame 1 and a main body for switching the vacuum circuit breaker. Vacuum circuit breaker body 2 is fixedly installed on the outside of the opening and closing frame 1 for vacuum arc extinguishing. Vacuum contact arc extinguishing chamber 3 is fixedly installed on the outside of the vacuum circuit breaker body 2. Knife switch plate 4 is fixedly installed at the front end of the vacuum contact arc extinguishing chamber 3. Insulating cylinder 5 is fixedly installed on the lower outside of the opening and closing frame 1. Drive shaft 6 is rotatably connected to the outside of the insulating cylinder 5. Opening plate 7 is fixedly installed on the outside of the drive shaft 6. Contact magnetic plate 8 is fixedly installed on both sides inside the opening and closing plate 7 for contacting the knife switch piece 4 for opening and closing. The opening and closing mechanism 1 is rotatably connected to the drive shaft 9. The two ends of the drive shaft 9 are fixedly installed with opening and closing handles 13. The opening and closing handles 13 are hinged to the outside of the contact frame 16. The lower part of the opening and closing mechanism 1 is fixedly installed with a fixing plate 17. The upper part of the fixing plate 17 is fixedly installed with a spring rod 18. The socket plate 19 is fixedly installed on both sides of the external opening and closing mechanism 1 to stabilize the opening and closing state. The external of the socket plate 19 is rotatably connected to the movable shaft 20. The external of the movable shaft 20 is fixedly installed with the opening and closing sleeve plate 21. The external thread of the movable shaft 20 is threaded through the fastening screw 22. After opening, the fastening screw 22 can be turned to rotate the opening and closing sleeve plate 21, so that the opening and closing sleeve plate 21 is fitted into the groove of the opening and closing handle 13. Then the fastening screw 22 is tightened. This can determine the opening state and ensure the stability of the opening. This gives the opening and closing mechanism of the vacuum circuit breaker the ability to stably lock the opening state.

[0018] like Figure 1 , Figure 2 and Figure 3 As shown, the insulating cylinder 5 is rotatably connected to the trip plate 7, and the knife switch 4 works in conjunction with the trip plate 7. The knife switch 4 enters the closed state when it contacts the trip plate 7, and enters the open state when it separates from the trip plate 7. A transmission rod 10 is fixedly installed on the outside of the drive shaft 9, and a connecting frame 11 is hinged to the front end of the transmission rod 10. The rotation of the drive shaft 9 can drive the transmission rod 10 and the connecting frame 11 to push out and pull back the trip plate 7, thereby completing the opening and closing operation. A bracket insulator 12 is fixedly installed on the outside of the connecting frame 11. The tail end of the bracket insulator 12 is hinged to the inside of the trip plate 7. The bracket insulator 12 is used to abut against the trip plate 7 and pull back the trip plate 7, thereby completing the opening and closing operation.

[0019] like Figure 1 , Figure 4 and Figure 5As shown, an indicator 14 is fixedly installed at the front end of the opening and closing handle 13, and an opening and closing indicator 15 is fixedly installed on the outside of the vacuum circuit breaker body 2. When the opening and closing handle 13 descends, the opening operation is completed, and the indicator 14 will point to the opening and closing indicator 15, thus providing clear instructions to the current user and surrounding observers. The top of the spring rod 18 is hinged to the contact frame 16, and the opening and closing handle 13 is rotatably connected to the opening and closing frame 1. The overall structure of the spring rod 18 is simple and easy to operate, and it is convenient for maintenance personnel to perform timely maintenance in case of failure.

[0020] The working principle of this utility model is as follows: First, the opening and closing mechanism of the vacuum circuit breaker is connected and installed to the vacuum circuit breaker body 2. Then, when the vacuum circuit breaker needs to be opened or closed, the opening and closing handle 13 rotates the drive shaft 9 to press the spring rod 18 downward. Then, the rotation of the drive shaft 9 causes the transmission rod 10 to push outward against the connecting frame 11, and the bracket insulator 12 simultaneously pushes against the opening plate 7. In this way, the opening plate 7, which was originally in contact with the knife switch 4, also rotates outward on the transmission shaft 6 of the insulating cylinder 5, thereby disengaging from the knife switch 4 and completing the opening operation. After opening, the fastening screw 22 can be turned to rotate the opening and closing sleeve 21, so that the opening and closing sleeve 21 is fitted into the groove of the opening and closing handle 13. Then, the fastening screw 22 is tightened. This can confirm the opening state and ensure the stability of the opening. To close, simply follow the above operation to disengage the opening and closing sleeve 21 and perform the opening and closing operation. An upward pulling force on the handle 13 causes the compressed spring rod 18 to spring back, pulling the opening / closing handle 13 upward. This causes the bracket insulator 12 to pull the opening plate 7 back to its original position. The opening plate 7 then re-engages with the knife switch 4, which inserts between the two contact magnetic plates 8 of the opening plate 7, thus completing the closing operation. This gives the vacuum circuit breaker's opening / closing mechanism a stable locking capability in the open state, a double-safety mechanism that significantly improves the reliability of the opening operation. Furthermore, the locking mechanism prevents unauthorized personnel from misoperating, reducing the risk of electric shock. It also eliminates the need for complex electronic interlocks or sensors, achieving locking solely through mechanical structures, thus reducing manufacturing costs and maintenance difficulty. After completing the installation and use of the vacuum circuit breaker's opening / closing mechanism according to the above operations, routine maintenance is all that's needed. This completes the usage process of the opening / closing mechanism for the vacuum circuit breaker.

[0021] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A switching mechanism for a vacuum circuit breaker, characterized in that: include The opening and closing frame (1) is the main body used for opening and closing vacuum circuit breakers; The vacuum circuit breaker body (2) is fixedly installed on the outside of the opening and closing frame (1) for vacuum arc extinguishing. Vacuum contact arc extinguishing chambers (3) are fixedly installed on the outside of the vacuum circuit breaker body (2). Knife switch plates (4) are fixedly installed at the front end of the vacuum contact arc extinguishing chambers (3). Insulating cylinders (5) are fixedly installed on the lower outside of the opening and closing frame (1). A drive shaft (6) is rotatably connected to the outside of the insulating cylinder (5). A tripping plate (7) is fixedly installed on the outside of the drive shaft (6). Contact magnetic plate (8) is fixedly installed on both sides inside the opening and closing plate (7) for contacting the knife switch (4) for opening and closing. The opening and closing frame (1) is rotatably connected to the drive shaft (9). The two ends of the drive shaft (9) are fixedly installed with opening and closing handles (13). The opening and closing handles (13) are hinged to the outside of the opening and closing handles (13). The opening and closing frame (17) is fixedly installed on the lower outside of the opening and closing frame (1). The spring rod (18) is fixedly installed on the upper part of the fixed plate (17). The socket plate (19) is fixedly installed on both sides of the opening and closing mechanism frame (1) to stabilize the opening and closing state. The socket plate (19) is rotatably connected to the outside of the movable shaft (20). The opening and closing sleeve plate (21) is fixedly installed on the outside of the movable shaft (20). The external thread of the movable shaft (20) is through the fastening screw (22).

2. The opening and closing mechanism for a vacuum circuit breaker according to claim 1, characterized in that: The insulating cylinder (5) is rotatably connected to the switch plate (7), and the knife switch plate (4) is used in conjunction with the switch plate (7).

3. The opening and closing mechanism for a vacuum circuit breaker according to claim 1, characterized in that: A transmission rod (10) is fixedly installed on the outside of the drive shaft (9), and a connecting frame (11) is hinged to the front end of the transmission rod (10).

4. The opening and closing mechanism for a vacuum circuit breaker according to claim 3, characterized in that: The connecting frame (11) is fixedly mounted with a bracket insulator (12), and the tail end of the bracket insulator (12) is hinged to the inside of the switch plate (7).

5. The opening and closing mechanism for a vacuum circuit breaker according to claim 1, characterized in that: An indicator (14) is fixedly installed at the front end of the opening and closing handle (13), and an opening and closing indicator (15) is fixedly installed on the outside of the vacuum circuit breaker body (2).

6. The opening and closing mechanism for a vacuum circuit breaker according to claim 1, characterized in that: The top of the spring rod (18) is hinged to the abutment frame (16), and the opening and closing handle (13) is rotatably connected to the opening and closing gate frame (1).

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