Program lock of circuit breaker mechanism

Abstract

The utility model discloses a circuit breaker mechanism program lock which is characterized in that a movable lock cylinder is arranged in a lock body of a program lock assembly, a lock pin is inserted into one end of the lock cylinder, the other end of the lock cylinder directly faces a closing rotating plate of a closing assembly, and the closing rotating plate rotates to push out the lock cylinder; a sliding plate capable of moving up and down is arranged on one side of the lock body, the sliding plate and the lock pin are located on the same side of the lock body, the sliding plate is located below the interlocking crank arm, the interlocking crank arm is arranged on the operation shaft and can rotate along with the operation shaft, and the interlocking crank arm rotates to drive the sliding plate to move in the vertical direction; a limiting piece is arranged on the sliding plate and matched with the lock pin. According to the program lock, the lock pin on the lock cylinder is matched with the limiting piece on the sliding plate for interlocking, indication is given out through the travel switch in the switching-on state, misoperation is avoided, and reliability and system safety are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of switch devices, in particular to a circuit breaker mechanism program lock. Background Art

[0002] To ensure reliable operation of the operating mechanism, high-voltage circuit breakers require interlocking devices. Common interlocking devices for circuit breaker mechanisms include program locks that implement circuit breaker opening and closing interlocks: these prevent the operating mechanism from closing the circuit breaker when it is in the closed position, and prevent it from opening the circuit breaker when it is in the open position.

[0003] The existing circuit breaker mechanism's opening and closing program lock structure has the possibility of misoperation and is not reliable enough, affecting the safety of the system. Utility Model Content

[0004] In view of the shortcomings of the above-mentioned existing circuit breaker mechanism opening and closing program lock structure, the applicant provides a circuit breaker mechanism program lock with a reasonable structure to avoid misoperation and improve reliability and system safety.

[0005] The technical solutions adopted in this utility model are as follows:

[0006] A program lock for a circuit breaker mechanism, wherein a movable lock core is provided in the lock body of the program lock assembly, a lock pin is inserted at one end of the lock core, and the other end of the lock core faces the closing rotary plate of the closing assembly, and the closing rotary plate can be rotated to push the lock core out; a slide plate that can move up and down is provided on one side of the lock body, the slide plate and the lock pin are located on the same side of the lock body, the slide plate is located below an interlocking crank arm, the interlocking crank arm is provided on an operating shaft and can rotate with the operating shaft, and the rotation of the interlocking crank arm can drive the slide plate to move in the vertical direction; a limit plate is provided on the slide plate, and the limit plate cooperates with the lock pin.

[0007] As a further improvement of the above technical solution:

[0008] A crank arm interlocking piece is provided on the slide corresponding to the interlocking crank arm, and a spring is connected between the crank arm interlocking piece and the interlocking crank arm; when the switch is in the open state, the interlocking crank arm pushes the slide to the lower position through the crank arm interlocking piece; when the switch is in the closed state, the interlocking crank arm leaves the crank arm interlocking piece, and the spring pulls the slide to the upper position.

[0009] A connecting hole is provided on the crank arm interlocking piece, and a spring is connected to the connecting hole.

[0010] A clearance groove is provided on the slide plate, and the lock core passes through the clearance groove.

[0011] A travel switch is provided on the outside of the lock body, and the operating rod of the travel switch is facing the lock cylinder; when the lock cylinder is in the open state, the lock cylinder does not press the operating rod, and the travel switch is disconnected; when the lock cylinder is in the closed state, the lock cylinder presses the operating rod, and the travel switch is closed.

[0012] The lock body is fixed on the supporting plate, a cover plate is arranged on the front side of the lock body, and the slide plate is arranged between the supporting plate and the cover plate so as to be movable up and down.

[0013] The support plate is provided with a first slide groove, the cover plate is provided with a second slide groove, and sliders are respectively provided on both sides of the slide plate. The sliders are movably slidably arranged in the first slide groove and the second slide groove.

[0014] The support plate is fixed to the front plate of the mechanism, and the travel switch is fixed to the cover plate.

[0015] The beneficial effects of the utility model are as follows:

[0016] The program lock of the utility model is interlocked by the lock pin on the lock cylinder and the limit plate on the slide, and gives an indication through the travel switch when in the closed state, ensuring that two circuit breaker mechanisms in a group of cabinets use the same key. After the program lock on one circuit breaker mechanism is unlocked, the mechanism is closed. If the key cannot be pulled out, the other mechanism cannot be closed without the key unlocked, thereby avoiding misoperation and improving reliability and system safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the present utility model.

[0018] Figure 2 It is a cross-sectional view of the present utility model.

[0019] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0020] Figure 4 This is a schematic diagram of the structure of the utility model in the open state, in which the cover plate is removed.

[0021] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0022] Figure 6 This is a schematic diagram of the structure of the utility model in the closed state, in which the cover plate is removed.

[0023] Figure 7 for Figure 6 Enlarged view of point C in the middle.

[0024] Figure 8 Schematic diagram of the structure of the skateboard.

[0025] In the figure: 10, mechanism front panel; 20, operating shaft; 30, closing assembly; 301, closing half-shaft; 302, closing rotary plate; 303, closing knob; 304, closing electromagnet; 40, opening assembly; 401, opening half-shaft; 402, opening rotary plate; 403, opening knob; 404, opening electromagnet; 50, interlocking arm;

[0026] 60. Program lock assembly; 1. Lock body; 2. Lock cylinder; 3. Lock pin; 4. Travel switch; 41. Operating lever; 5. Slide plate; 51. Slider; 52. Crank arm interlocking plate; 53. Connecting hole; 54. Gap groove; 55. Limiting plate; 6. Support plate; 61. First slide groove; 7. Cover plate; 71. Second slide groove; 8. Spring. DETAILED DESCRIPTION

[0027] The specific implementation of the present utility model will be described below with reference to the accompanying drawings.

[0028] like Figure 1 、 Figure 2 As shown, the front plate 10 of the mechanism of the present invention is provided with an operating shaft 20, a closing assembly 30, an opening assembly 40 and a program lock assembly 60. The operating shaft 20 is provided with an interlocking crank arm 50, which can rotate with the operating shaft 20.

[0029] The closing assembly 30 includes a closing half-shaft 301, a closing rotary plate 302, a closing knob 303, and a closing electromagnet 304. The closing rotary plate 302 and closing knob 303 are mounted on the closing half-shaft 301. The closing rotary plate 302 rotates with the closing half-shaft 301, and the closing knob 303 operates the closing half-shaft 301 to close the circuit. The closing electromagnet 304 is mounted outside the closing rotary plate 302, with its core facing the closing rotary plate 302. This electromagnet 304 directly drives the closing rotary plate 302, thereby driving the closing half-shaft 301 to close the circuit.

[0030] The trip assembly 40 includes a trip half-shaft 401, a trip plate 402, a trip knob 403, and a trip electromagnet 404. The trip plate 402 and the trip knob 403 are mounted on the trip half-shaft 401. The trip plate 402 rotates with the trip half-shaft 401, and the trip knob 403 operates the trip half-shaft 401 to perform a trip operation. The trip electromagnet 404 is mounted outside the trip plate 402, with its core facing the trip plate 402. The trip electromagnet 404 directly drives the trip plate 402, driving the trip half-shaft 401 to perform a trip operation.

[0031] The program lock assembly 60 is located below the operating shaft 20 and to the right of the closing assembly 30. The program lock assembly 60 comprises a lock body 1, which is fixed to a support plate 6, which is fixed to the mechanism front plate 10. A cover plate 7 is located on the front right end of the lock body 1. A lock cylinder 2 is housed within the lock body 1, which can move horizontally left and right. A lock pin 3 is radially inserted into the right end of the lock cylinder 2. The left end of the lock cylinder 2 faces the closing turntable 302. The iron cores of the lock cylinder 2 and the closing electromagnet 304 are located on opposite sides of the closing turntable 302. When closing the circuit breaker, the closing half shaft 301 is operated by the closing knob 303, or the closing electromagnet 304 directly drives the closing turntable 302. The lock cylinder 2 is unlocked by rotating it with a key, and the lock cylinder 2 retracts. A limit switch 4 is located on the right side of the lock body 1 (on the same side as the lock pin 3) and is fixedly connected to the cover plate 7. The operating rod 41 of the travel switch 4 is opposite to the right end of the lock cylinder 2; Figure 4 、 Figure 5 As shown, in the open state, the lock core 2 returns to the left position and does not extend toward the limit switch 4. The lock core 2 does not press the operating rod 41, and the limit switch 4 is disconnected; Figure 6 、 Figure 7 As shown, in the closed state, the lock core 2 is pushed toward the limit switch 4 to the right position, the lock core 2 presses the operating rod 41, and the limit switch 4 is closed.

[0032] like Figures 1 to 3 As shown, the lock body 1 is provided with a slide plate 5 that can move up and down in the vertical direction on the side facing the limit switch 4 (the same side as the lock pin 3). The slide plate 5 is horizontally placed between the support plate 6 and the cover plate 7 in the front-to-back direction (parallel to the direction of the operating axis 20). Figure 1 、 Figure 3 、 Figure 4 、 Figure 6 、 Figure 8As shown, sliders 51 are respectively provided on the front and rear sides of the slide plate 5. A first slide groove 61 is correspondingly provided on the support plate 6, and a second slide groove 71 is correspondingly provided on the cover plate 7. The slider 51 on the rear side of the slide plate 5 is movably slidably disposed in the first slide groove 61, and the slider 51 on the front side of the slide plate 5 is movably slidably disposed in the second slide groove 71. The slider 51 is clearance-fitted with the first and second slide grooves 61 and 71, and the slider 51 can move up and down along the first and second slide grooves 61 and 71. A crank arm interlocking piece 52 is formed at the top of the slide plate 5, corresponding to the interlocking crank arm 50, and a connecting hole 53 is provided on the crank arm interlocking piece 52. A spring 8 is connected between the crank arm interlocking piece 52 and the interlocking crank arm 50, and the spring 8 is connected to the connecting hole 53. The crank arm interlocking piece 52 is located directly below the interlocking crank arm 50; when the switch is open, the interlocking crank arm 50 rests on the crank arm interlocking piece 52, pushing the slide 5 to the lower position; when the switch is closed, the interlocking crank arm 50 leaves the crank arm interlocking piece 52, and the spring 8 pulls the slide 5 to the upper position. A clearance groove 54 is provided on the surface of the slide 5, and the lock cylinder 2 passes through the clearance groove 54. The clearance groove 54 makes way for the lock cylinder 2 to avoid interference between the movement of the lock cylinder 2 and the slide 5. A limit plate 55 is provided on the slide 5 corresponding to the lock pin 3, and the limit plate 55 is interlocked with the lock pin 3. As shown in FIG. Figure 4 、 Figure 5 As shown, in the open state, the lock cylinder 2 is in the left position and is not pushed toward the travel switch 4, and the lock pin 3 is above the limit piece 55; Figure 6 、 Figure 7 As shown, when the switch is closed, the lock cylinder 2 is pushed toward the travel switch 4 to the right position, the lock pin 3 moves to the right with the lock cylinder 2, and the limit plate 55 moves up with the slide plate 5 and blocks the middle position on the left side of the lock pin 3, blocking the return path of the lock cylinder 2 to the left. At this time, the lock cylinder 2 cannot be reset and the key cannot be pulled out.

[0033] When the utility model is actually used: (1) Figure 4 、 Figure 5 As shown, when the circuit breaker mechanism is in the open state, the operating shaft 20 drives the interlocking crank arm 50 to rotate to the open position, and the interlocking crank arm 50 pushes the slide plate 5 to the lower position through the crank arm interlocking piece 52, the lock core 2 returns to the left position, the travel switch 4 is disconnected, and the limit piece 55 of the slide plate 5 is below the lock pin 3, and the opening operation cannot be performed; (2) Figure 6 、 Figure 7 As shown, when the circuit breaker mechanism is in the closed state, the closing knob 303 or the closing electromagnet 304 drives the closing turn plate 302 to push the lock cylinder 2 to the right position, the limit switch 4 is connected and sends a signal to give a closing instruction, the operating shaft 20 drives the interlocking crank arm 50 to the closed position, the spring 8 pulls the slide plate 5 to the upper position, and the limit plate 55 blocks the left side of the lock pin 3, and the closing operation cannot be performed.

[0034] The program lock of the utility model is interlocked by the lock pin 3 on the lock cylinder 2 and the limit plate 55 on the slide 5, and gives an indication through the limit switch 4 when the circuit breaker mechanism is in the closed state, ensuring that the same key is used for two circuit breaker mechanisms in a group of cabinets. After the program lock on one circuit breaker mechanism is unlocked, the mechanism is closed. If the key cannot be pulled out, the other mechanism cannot be closed without the key unlocked, thereby avoiding misoperation and improving reliability and system safety.

[0035] The above description is an explanation of the present invention, not a limitation of the present invention. The present invention may be modified in any form without violating the spirit of the present invention.

Claims

1. A circuit breaker mechanism program lock, characterized by: A movable lock core (2) is provided in the lock body (1) of the program lock assembly (60), a lock pin (3) is inserted at one end of the lock core (2), and the other end of the lock core (2) faces the closing rotary plate (302) of the closing assembly (30), and the closing rotary plate (302) rotates to push the lock core (2); a slide plate (5) that can move up and down is provided on one side of the lock body (1), the slide plate (5) and the lock pin (3) are located on the same side of the lock body (1), the slide plate (5) is located below the interlocking crank arm (50), the interlocking crank arm (50) is provided on the operating shaft (20) and can rotate with the operating shaft (20), and the rotation of the interlocking crank arm (50) can drive the slide plate (5) to move in the vertical direction; a limit plate (55) is provided on the slide plate (5), and the limit plate (55) cooperates with the lock pin (3).

2. The circuit breaker mechanism program lock according to claim 1, characterized in that: A crank arm interlocking piece (52) is provided on the slide plate (5) corresponding to the interlocking crank arm (50), and a spring (8) is connected between the crank arm interlocking piece (52) and the interlocking crank arm (50); when the switch is in the open state, the interlocking crank arm (50) pushes the slide plate (5) to the lower position through the crank arm interlocking piece (52); when the switch is in the closed state, the interlocking crank arm (50) leaves the crank arm interlocking piece (52), and the spring (8) pulls the slide plate (5) to the upper position.

3. The circuit breaker mechanism program lock according to claim 2, characterized in that: A connecting hole (53) is provided on the crank arm interlocking piece (52), and the spring (8) is connected to the connecting hole (53).

4. The circuit breaker mechanism program lock according to claim 1, characterized in that: The slide plate (5) is provided with a clearance groove (54), and the lock core (2) passes through the clearance groove (54).

5. The circuit breaker mechanism program lock according to claim 1, characterized in that: A travel switch (4) is provided on the outer side of the lock body (1), and an operating rod (41) of the travel switch (4) faces the lock core (2); in an open state, the lock core (2) does not press the operating rod (41), and the travel switch (4) is disconnected; in a closed state, the lock core (2) presses the operating rod (41), and the travel switch (4) is closed.

6. The circuit breaker mechanism program lock according to claim 1, characterized in that: The lock body (1) is fixed on the support plate (6), a cover plate (7) is provided on the front side of the lock body (1), and the slide plate (5) is movably provided between the support plate (6) and the cover plate (7).

7. The circuit breaker mechanism program lock according to claim 6, characterized in that: A first chute (61) is provided on the support plate (6), a second chute (71) is provided on the cover plate (7), and sliders (51) are respectively provided on both sides of the slide plate (5), and the sliders (51) are movably slidably arranged in the first chute (61) and the second chute (71).

8. The circuit breaker mechanism program lock according to claim 5 or 6, characterized in that: The support plate (6) is fixed to the mechanism front plate (10), and the travel switch (4) is fixedly connected to the cover plate (7).

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