Anti-misoperation interlocking device between circuit breaker and isolating switch
By designing a mechanical interlocking device between the circuit breaker and the isolating switch, and using the rotation of the locking shaft to achieve electrical and mechanical latching, the problem of unreliable interlocking in the prior art is solved, ensuring the safety of electricity use and saving space.
Patent Information
- Application Number
- CN202421178176.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-05-27
Smart Images
Figure CN222440407U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of circuit breakers, and more specifically, to an anti-misoperation interlocking device between a circuit breaker and an isolating switch. Background Art
[0002] In the high-voltage electrical industry, as people pay more and more attention to electricity safety, strict requirements are put forward for various possible illegal operations, and high-voltage electrical products must have complete mechanical anti-error measures. In the past, some adopted electrical contact anti-error measures and wire rope soft connection anti-error measures. Due to the reasons of the electrical components and the wire rope soft connection mode themselves, the anti-error failure often caused accidents. Therefore, we propose an anti-error interlocking device between the circuit breaker and the disconnector. Utility Model Content
[0003] The purpose of the present application is to provide an anti-error interlocking device between a circuit breaker and a disconnector, which solves the technical problems in the above-mentioned background technology and the drawbacks of unreliable and easy failure of the interlocking between the circuit breaker and the disconnector in the past, and can integrate the fixed circuit breaker and the disconnector into one, and has a simple structure and a technical effect of saving space.
[0004] The technical solution of the present application provides an anti-misoperation interlocking device between a circuit breaker and an isolating switch, comprising an isolating switch operating rod, a circuit breaker spring operating mechanism and a frame, wherein the circuit breaker spring operating mechanism comprises an opening half-shaft, and is characterized in that: it also comprises an isolating switch operating mechanism arranged on the top of the frame, wherein the isolating switch operating mechanism comprises an isolating switch operating motor and a locking microswitch electrically connected to the isolating switch operating motor, the isolating switch operating rod passes through the isolating switch operating mechanism, the isolating switch operating mechanism can cover the isolating switch operating rod, the isolating switch operating mechanism can contact and press the locking microswitch, and the isolating switch operating mechanism can push the opening half-shaft.
[0005] As an optional solution to the technical solution of the present application document, the isolating switch operating mechanism also includes a locking shaft, a microswitch pressure plate fixed on the locking shaft and placed above the locking microswitch contact rod, a disconnecting top rod rotatably connected to the locking shaft and slidably inserted on the frame, a disconnecting tripping bent plate fixed on the disconnecting half-shaft and a locking baffle fixed on the locking shaft, the disconnecting top rod is vertically arranged to the disconnecting half-shaft, the locking shaft is coaxially fixed with a manual knob, and the isolating switch operating rod is within the rotation radius of the locking baffle.
[0006] As an optional solution of the technical solution of the present application document, a gate opening crank arm is fixed on the locking shaft, and the gate opening top rod is rotatably connected to the gate opening crank arm.
[0007] As an optional solution of the technical solution of the present application document, the frame is symmetrically fixed with a mounting bent plate, and the locking shaft is rotatably connected to the mounting bent plate.
[0008] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
[0009] 1. This application abandons the original wire rope soft connection interlocking mode and electrical contact interlocking mode, and provides a simple and reliable mechanical interlocking method, which solves the drawbacks of unreliable and easy failure of circuit breaker interlocking in the past, and can integrate the fixed circuit breaker and the disconnector into one, with a simple structure and space saving.
[0010] 2. The rotation of the locking shaft in the interlocking device of the present application realizes both electrical locking and mechanical locking, and realizes the manual priority function of the isolating switch.
[0011] 3. The interlocking device in the present application realizes that the circuit breaker cannot be closed electrically or manually as long as the locking device is released.
[0012] 4. The interlocking device in the present application realizes that as long as the mechanical interlock is in the locked position, the disconnector cannot be operated. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 A schematic diagram of the overall locking state structure of an anti-misoperation interlocking device between a circuit breaker and a disconnector disclosed in a preferred embodiment of the present application;
[0014] Figure 2 A preferred embodiment of the present application discloses an anti-misoperation interlocking device between a circuit breaker and an isolating switch Figure 1 The enlarged structural diagram at A in the middle;
[0015] Figure 3 A preferred embodiment of the present application discloses an anti-misoperation interlocking device between a circuit breaker and an isolating switch Figure 1 Top view structural diagram;
[0016] Figure 4 A schematic diagram of the unlocked state structure of an anti-misoperation interlocking device between a circuit breaker and a disconnector disclosed in a preferred embodiment of the present application;
[0017] Figure 5 A preferred embodiment of the present application discloses an anti-misoperation interlocking device between a circuit breaker and an isolating switch Figure 4 The enlarged structural diagram at B in the middle;
[0018] Explanation of the numbers in the figure: 1. Circuit breaker spring operating mechanism; 2. Locking baffle; 3. Locking microswitch; 4. Microswitch pressure plate; 5. Opening arm; 6. Opening top rod; 7. Opening tripping bent plate; 8. Opening half shaft; 9. Disconnector operating motor; 10. Disconnector operating mechanism; 11. Disconnector operating lever; 12. Manual knob; 13. Locking shaft; 14. Mounting bent plate; 15. Frame. DETAILED DESCRIPTION
[0019] The present application is further described in detail below in conjunction with the accompanying drawings.
[0020] A misoperation interlocking device between a circuit breaker and an isolating switch comprises an isolating switch operating rod 11, a circuit breaker spring operating mechanism 1 and a frame 15. The circuit breaker spring operating mechanism 1 comprises an opening half shaft 8, and also comprises an isolating switch operating mechanism 10 arranged on the top of the frame 15. The isolating switch operating mechanism 10 comprises an isolating switch operating motor 9 and a locking micro switch 3 electrically connected to the isolating switch operating motor 9. The isolating switch operating rod 11 runs through the isolating switch operating mechanism 10. The isolating switch operating mechanism 10 can cover the isolating switch operating rod 11. The isolating switch operating mechanism 10 can contact and press the locking micro switch 3. The isolating switch operating mechanism 10 can push the opening half shaft 8.
[0021] Reference Figure 1 - Figure 5 The isolating switch operating rod 11 passes through the hexagonal hole of the isolating switch operating mechanism 10. When the interlocking device is in the locked state, the isolating switch operating mechanism 10 blocks the end of the isolating switch operating rod 11, and the manual operating handle cannot be inserted into the operating shaft, thereby realizing that the isolating switch cannot be manually operated; in this state, to electrically operate the isolating switch, the circuit breaker needs to be in the open state, and the isolating switch operating mechanism 10 is rotated clockwise to deviate from the isolating switch operating rod 11. The handle can be smoothly inserted into the isolating switch operating rod 11, and at the same time, the isolating switch operating mechanism 10 pushes the opening half shaft 8 to rotate clockwise, thereby ensuring that the circuit breaker is always in the open state.
[0022] The isolating switch operating mechanism 10 also includes a locking shaft 13, a microswitch pressure plate 4 fixed on the locking shaft 13 and placed above the contact rod of the locking microswitch 3, a disconnecting top rod 6 rotatably connected to the locking shaft 13 and slidably inserted on the frame 15, a disconnecting tripping bent plate 7 fixed on the disconnecting half-shaft 8 and a locking baffle 2 fixed on the locking shaft 13, the disconnecting top rod 6 is vertically arranged with the disconnecting half-shaft 8, the locking shaft 13 is coaxially fixed with the manual knob 12, and the isolating switch operating rod 11 is within the rotation radius of the locking baffle 2.
[0023] A gate opening arm 5 is fixed on the locking shaft 13 , and a gate opening push rod 6 is rotatably connected to the gate opening arm 5 .
[0024] Reference Figure 1 - Figure 5 A locking shaft 13 is provided on the right side of the disconnector operating rod 11. The locking shaft 13 is fixed and guided by installing a bent plate 14. The locking baffle 2, the opening arm 5, the microswitch pressure plate 4 and the manual knob 12 are fixed on the locking shaft 13 by screws. The opening arm 5 is hinged with the opening top rod 6. The interlocking device is in a locked state. The locking baffle 2 on the locking shaft 13 blocks the end of the disconnector operating rod 11. The manual operating handle cannot be inserted into the operating shaft. Turn the manual knob 12 clockwise The interlocking device is in the unlocked state, thereby driving the locking shaft 13 to rotate clockwise, and the locking baffle 2, the opening switch arm 5, and the microswitch pressure plate 4 fixed on the locking shaft 13 also rotate clockwise, the locking baffle 2 deviates from the disconnector operating rod 11, and the handle can be smoothly inserted into the disconnector operating rod 11. At the same time, the opening switch arm 5 rotates clockwise to drive the opening switch top rod 6 downward, pushing the opening switch tripping bent plate 7 fixed on the opening switch half-shaft 8 to move downward, driving the opening switch half-shaft 8 to rotate clockwise.
[0025] The frame 15 is symmetrically fixed with a mounting bent plate 14 , and the locking shaft 13 is rotatably connected to the mounting bent plate 14 .
[0026] Reference Figure 3 The locking shaft 13 is rotatably connected to the mounting bent plate 14 through a bearing to limit the locking shaft 13.
[0027] Working principle: When the interlocking device is in the locked state (refer to Figure 3 ), the locking baffle 2 on the locking shaft 13 blocks the end of the disconnector operating rod 11, the microswitch pressure plate 4 presses the contact of the locking microswitch 3, and the manual operating handle cannot be inserted into the operating shaft, so that the disconnector cannot be manually operated. In this state, to electrically operate the disconnector, the circuit breaker needs to be in the open state, because the auxiliary contacts of the circuit breaker are connected in series to the disconnector operating circuit. As long as the circuit breaker is in the closed position, the disconnector cannot be electrically operated, which prevents the disconnector from closing with load by mistake; and to realize the manual operation of the disconnector, it is necessary to rotate the manual knob 12 clockwise to unlock the interlocking device (refer to Figure 5), thereby driving the locking shaft 13 to rotate clockwise, and the locking baffle 2, the opening arm 5, and the micro switch pressure plate 4 fixed on the locking shaft 13 also rotate clockwise, the contact of the locking micro switch 3 pops up, the locking baffle 2 deviates from the disconnector operating rod 11, and the handle can be smoothly inserted into the disconnector operating rod 11. At the same time, the opening arm 5 rotates clockwise to drive the opening top rod 6 downward, and the opening tripping bent plate 7 fixed on the opening half shaft 8 moves downward, driving the opening half shaft 8 to rotate clockwise, thereby ensuring that the circuit breaker is always in the opening state. In this state, the disconnector can be manually operated, avoiding the operation of the disconnector with load. At this time, the locking micro switch 3 is switched, and the disconnector operating motor 9 cannot operate the disconnector, thereby realizing the manual priority function. When the disconnector needs to be operated electrically, it is not necessary to release the locking device, because the mode is switched by the electrical contact to ensure that the disconnector can only be operated electrically when the circuit breaker is opened and the manual operation is locked.
Claims
1. An anti-error interlocking device between a circuit breaker and an isolating switch, comprising an isolating switch operating rod (11), a circuit breaker spring operating mechanism (1) and a frame (15), wherein the circuit breaker spring operating mechanism (1) comprises a disconnecting half shaft (8), characterized in that: The invention also comprises an isolating switch operating mechanism (10) arranged on the top of the frame (15), the isolating switch operating mechanism (10) comprising an isolating switch operating motor (9) and a locking micro switch (3) electrically connected to the isolating switch operating motor (9), an isolating switch operating rod (11) passing through the isolating switch operating mechanism (10), the isolating switch operating mechanism (10) can cover the isolating switch operating rod (11), the isolating switch operating mechanism (10) can contact and press the locking micro switch (3), and the isolating switch operating mechanism (10) can push the opening half shaft (8).
2. The anti-error interlocking device between a circuit breaker and a disconnector according to claim 1, characterized in that: The isolating switch operating mechanism (10) further comprises a locking shaft (13), a micro switch pressure plate (4) fixed on the locking shaft (13) and placed above a contact rod of the locking micro switch (3), a switch-off top rod (6) rotatably connected to the locking shaft (13) and slidably inserted on a frame (15), a switch-off tripping bent plate (7) fixed on a switch-off half shaft (8), and a locking baffle (2) fixed on the locking shaft (13); the switch-off top rod (6) is arranged vertically with respect to the switch-off half shaft (8); a manual knob (12) is coaxially fixed on the locking shaft (13); and the isolating switch operating rod (11) is within the rotation radius of the locking baffle (2).
3. The anti-error interlocking device between a circuit breaker and a disconnector according to claim 2, characterized in that: A gate opening crank arm (5) is fixed on the locking shaft (13), and the gate opening top rod (6) is rotatably connected to the gate opening crank arm (5).
4. The anti-error interlocking device between a circuit breaker and a disconnector according to claim 2, characterized in that: The frame (15) is symmetrically fixed with a mounting bent plate (14), and the locking shaft (13) is rotatably connected to the mounting bent plate (14).