A circuit breaker with closing restriction effect

Abstract

The present invention provides a circuit breaker with a closing restriction effect, belonging to the field of circuit and electrical appliance technology, and is used to solve the technical problem that existing circuit breakers are prone to accidental closing and have low safety. The circuit breaker comprises a circuit breaker body, a lever rotatably provided on the circuit breaker body, a protrusion fixed below the lever, a limit hole provided on the protrusion, a groove provided on the side wall of the circuit breaker body, the groove being located directly below the protrusion, a limit mechanism provided in the circuit breaker body, a top column bolt connected to the side wall of the circuit breaker body, and a prompt mechanism and a locking mechanism provided on the circuit breaker body. The present invention inserts the limit block into the limit hole to prevent the circuit breaker body from closing, thereby improving safety. The circuit breaker body in the closed state is locked with the top column bolt, preventing the top column bolt from being used in multiple places, further improving safety. The closing operation is doubly restricted, forcing the closing operator to see the prompt sign, further preventing non-operating personnel from performing the closing operation without knowing it.

Description

Technical Field

[0001] The present invention belongs to the technical field of circuits and electrical appliances, and relates to a circuit breaker, in particular to a circuit breaker with a closing restriction effect. Background Art

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions, and closing, carrying, and interrupting current under abnormal circuit conditions within a specified timeframe. Circuit breakers are categorized as high-voltage and low-voltage based on their scope of use. The distinction between high and low voltage is somewhat ambiguous, with those above 3kV generally considered high-voltage. Circuit breakers can be used to distribute electrical energy, infrequently start asynchronous motors, and protect power lines and motors. They automatically disconnect circuits in the event of severe overloads, short circuits, or undervoltage faults. Their functionality is equivalent to a combination of a fuse-type switch and an over- and under-temperature relay. Furthermore, interrupting fault current generally requires no component changes. They have gained widespread application.

[0003] When inspecting electrical appliances, operators need to disconnect the circuit breaker in the circuit to cut off the power and prevent the danger of electric shock when inspecting the appliances. When the operator disconnects the circuit breaker and leaves to inspect the appliances in a distant location, the circuit breaker can easily be closed by uninformed non-operators, causing electric shock to the maintenance personnel, and even casualties in serious cases.

[0004] Based on this, we designed a circuit breaker with a limiting closing effect. Summary of the Invention

[0005] The purpose of the present invention is to address the above problems in the existing technology and propose a circuit breaker with a closing restriction effect. The technical problem to be solved by the device is: how to prevent non-operating personnel from closing the circuit breaker and improve safety.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A circuit breaker with a closing restriction effect comprises a circuit breaker body, a toggle lever rotatably provided on the circuit breaker body, a protrusion fixed below the toggle lever, a limiting hole provided on the protrusion, a groove provided on the side wall of the circuit breaker body, and the groove being located directly below the protrusion, a limiting mechanism provided in the circuit breaker body, the limiting mechanism comprising a clamp fixed on the inner wall of the circuit breaker body, a limiting block slidably provided on the clamp, a moving frame fixed at the lower end of the limiting block, a first inclined plate fixed at the bottom of the moving frame, a flat plate fixed at the upper end of the first inclined plate, a limiting spring fixed between the flat plate and the inner wall of the bottom of the circuit breaker body, a threaded hole provided on the side wall of the circuit breaker body, a top column bolt threadedly connected in the threaded hole, the top column bolt passing through the inner side of the moving frame, and its end abutting against the first inclined plate, a prompt mechanism provided at the side end of the circuit breaker body, and a locking mechanism provided inside the circuit breaker body.

[0008] The working principle of the present invention is as follows: when the operator pushes the lever downward to disconnect the circuit breaker body, the protrusion is inserted downward into the groove, and at this time the limit hole is aligned with the limit block. The operator can now unscrew the top column bolt. At this time, under the action of the limit spring, the flat plate, the first inclined plate, the movable frame and the limit block are pushed upward, and the end of the limit block is inserted into the limit hole. The limit block locks the protrusion to prevent the lever from being pushed upward. The circuit breaker body can only be closed after the operator screws the top column bolt into the threaded hole again and moves the first inclined plate and the limit block downward. This prevents the circuit breaker body from being closed by other personnel when the operator is not on site, thereby improving the safety of the operator when repairing the circuit.

[0009] The locking mechanism includes a second inclined plate and two limit plates. The second inclined plate is slidably arranged on the inner wall of the circuit breaker body, and a push-up assembly is provided between the second inclined plate and the inner wall of the circuit breaker body. The second inclined plate is located directly below the protrusion, and a through hole is provided on the second inclined plate, which is aligned with the limit block. Connecting plates are fixed at both ends of the second inclined plate, and the two limit plates are respectively fixed to the lower ends of the two connecting plates. An annular groove is provided at the end of the top column bolt, and the limit plate is aligned with the annular groove.

[0010] With the above structure, when the toggle lever is toggled upward, the protrusion separates from the second inclined plate, and the second inclined plate is pushed upward by the push-up assembly and drives the two connecting plates and the two limit plates to move upward. At this time, the two limit plates are respectively stuck in the two sides of the annular groove, thereby limiting the screwing out of the top column bolt, ensuring that the circuit breaker body in the closed state is stuck with the top column bolt, preventing non-operating personnel from removing the top column bolt on other circuit breaker bodies in the closed state in the meter box and closing the circuit breaker body in the non-closed state, further improving the closing restriction effect of the circuit breaker body and improving the safety of the operator.

[0011] The push-up assembly includes two fixed blocks fixed on the inner wall of the circuit breaker body, a circular hole is opened on the fixed block, a round rod is slidably arranged in the circular hole, the upper end of the round rod is fixedly connected to the lower surface of the second inclined plate, and a push-up spring is sleeved on the round rod, and the two ends of the push-up spring are respectively against the lower surface of the second inclined plate and the upper surface of the fixed block.

[0012] With the above structure, the push-up spring can push the second inclined plate upward, driving the two limit plates to snap into the annular grooves, and the two push-up springs are symmetrically distributed, so the second inclined plate moves up and down more smoothly.

[0013] The prompt mechanism includes a soft plate, a locking assembly and a linkage assembly. An L-shaped slide groove is provided on the side wall of the circuit breaker body, and a viewport is provided at the front end of the circuit breaker body, and the viewport is connected to the L-shaped slide groove. The soft plate is slidably arranged in the L-shaped slide groove, and a prompt slogan is provided on the upper surface of the soft plate. A shift block is fixed to the lower end of the soft plate.

[0014] With the above structure, after the operator disconnects the circuit breaker body, he can slide the dial block down along the L-shaped slide groove toward the soft plate, so that the prompt slogan is aligned with the viewport. Non-operating personnel can see the prompt slogan when closing the circuit breaker, thereby stopping the closing operation, further reducing the possibility of electric shock for the operator.

[0015] The locking assembly includes several fixing rods, which are fixed to the lower end of the soft board and are evenly spaced. A limiting groove is provided on the upper end of the shift rod, and the limiting groove is aligned with the lower end of the L-shaped sliding groove.

[0016] With the above structure, when the operator slides the soft plate downward, the lower end of the fixed rod can be inserted into the limit slot, and the rotation of the lever is restricted, preventing the closing of the circuit breaker. This forces non-operators to move the soft plate while closing the circuit breaker, preventing non-operators from missing the prompt sign, providing double protection for the closing operation and improving safety.

[0017] The linkage assembly includes two sliding rods. Two symmetrically distributed sliding holes are opened on both sides of the front end of the circuit breaker body, and the sliding holes are located on both sides of the shift rod. The sliding rods are slidably inserted into the sliding holes. The upper ends of the two sliding rods are fixed with a first cross bar, and the lower ends of the two sliding rods are fixed with a second cross bar, and the second cross bar is abutted against the upper end of the top column bolt. A linkage spring is sleeved on the sliding rod, and the two ends of the linkage spring are distributed and abutted against the outer wall of the circuit breaker body and the second cross bar.

[0018] With the above structure, when the operator unscrews the top column bolt, the linkage spring pushes the second cross bar, the first cross bar and the slide bar downward. At this time, the first cross bar drives the shift block to move downward, and then drives the soft board to move, preventing the operator from forgetting to shift the soft board, making the operation more convenient.

[0019] Compared with the existing technology, the circuit breaker with limited closing effect has the following advantages:

[0020] 1. Through the limit mechanism, when unscrewing the top column bolt, the limit block is inserted into the limit hole to prevent the lever from moving upward, preventing the circuit breaker body from closing, and improving the safety of operators when repairing the circuit.

[0021] 2. The locking mechanism ensures that the circuit breaker body in the closed state is locked with the top column bolt, preventing non-operating personnel from removing the top column bolts on other circuit breaker bodies in the closed state in the meter box and closing the circuit breaker body in the non-closed state, further improving the safety of the operator.

[0022] 3. Through the prompt mechanism, the closing operation is doubly limited, forcing the closing personnel to see the prompt slogan, further preventing non-operating personnel from performing closing operations without knowing it, and further improving the safety of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure inside the circuit breaker body of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the shift lever in the present invention;

[0026] Figure 4 It is a structural diagram of the limiting mechanism in the present invention;

[0027] Figure 5 It is a schematic structural diagram of the top column bolt in the present invention;

[0028] Figure 6 It is a structural schematic diagram of the jamming mechanism in the present invention;

[0029] Figure 7 It is a structural diagram of the flexible board in the present invention;

[0030] Figure 8 It is a structural diagram of the linkage assembly in the present invention;

[0031] In the figure: 1. Circuit breaker body; 2. Push rod; 3. Bump; 4. Limit hole; 5. Groove; 6. Clamp; 7. Limit block; 8. Moving frame; 9. First inclined plate; 10. Flat plate; 11. Limit spring; 12. Threaded hole; 13. Top column bolt; 14. Second inclined plate; 15. Connecting plate; 16. Limit plate; 17. Through hole; 18. Annular groove; 19. Fixing block; 20. Round rod; 21. Push-up spring; 22. L-shaped slide; 23. Viewport; 24. Soft board; 25. Warning slogan; 26. Push block; 27. Fixing rod; 28. Limit groove; 29. Slide bar; 30. First cross bar; 31. Second cross bar; 32. Interlocking spring. DETAILED DESCRIPTION

[0032] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0033] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0034] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this patent.

[0035] In the description of this patent, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "set" should be understood in a broad sense. For example, they can refer to fixed connection or set, detachable connection or set, or integral connection or set. Those skilled in the art will understand the specific meanings of the above terms in this patent based on the specific circumstances.

[0036] See also Figure 1-8 The present embodiment provides a circuit breaker with a closing restriction effect, comprising a circuit breaker body 1, a lever 2 rotatably provided on the circuit breaker body 1, a protrusion 3 fixed below the lever 2, a limiting hole 4 provided on the protrusion 3, a groove 5 provided on the side wall of the circuit breaker body 1, and the groove 5 is located directly below the protrusion 3, a limiting mechanism is provided in the circuit breaker body 1, the limiting mechanism comprises a clamp 6 fixed on the inner wall of the circuit breaker body 1, a limiting block 7 is slidably provided on the clamp 6, a moving frame 8 is fixed at the lower end of the limiting block 7, a first inclined plate 9 is fixed at the bottom of the moving frame 8, a flat plate 10 is fixed at the upper end of the first inclined plate 9, a limiting spring 11 is fixed between the flat plate 10 and the inner wall of the bottom of the circuit breaker body 1, a threaded hole 12 is provided on the side wall of the circuit breaker body 1, and a top column bolt 13 is threadedly connected in the threaded hole 12, the top column bolt 13 passes through the inner side of the moving frame 8, and its end When the operator pushes the lever 2 downward to disconnect the circuit breaker body 1, the protrusion 3 is inserted into the groove 5 downward, and the limit hole 4 is aligned with the limit block 7 at this time. The operator can unscrew the top column bolt 13. At this time, under the action of the limit spring 11, the flat plate 10, the first inclined plate 9, the movable frame 8 and the limit block 7 are pushed upward, and the end of the limit block 7 is inserted into the limit hole 4. The limit block 7 locks the protrusion 3 to prevent the lever 2 from being pushed upward. Only when the operator screws the top column bolt 13 into the threaded hole 12 again and moves the first inclined plate 9 and the limit block 7 downward can the circuit breaker body 1 be closed, preventing the circuit breaker body 1 from being closed by other personnel when the operator is not on site, thereby improving the safety of the operator when repairing the circuit.

[0037] The locking mechanism includes a second inclined plate 14 and two limit plates 16. The second inclined plate 14 is slidably arranged on the inner wall of the circuit breaker body 1, and an upward push component is provided between the second inclined plate 14 and the inner wall of the circuit breaker body 1. The second inclined plate 14 is located directly below the protrusion 3, and a through hole 17 is provided on the second inclined plate 14. The through hole 17 is aligned with the limit block 7. Connecting plates 15 are fixed at both ends of the second inclined plate 14. The two limit plates 16 are respectively fixed to the lower ends of the two connecting plates 15. An annular groove 18 is provided at the end of the top column bolt 13, and the limit plate 16 is aligned with the annular groove 18. When the lever 2 is pushed upward, The protrusion 3 is separated from the second inclined plate 14, and the second inclined plate 14 is pushed upward by the push-up assembly and drives the two connecting plates 15 and the two limit plates 16 to move upward. At this time, the two limit plates 16 are respectively stuck in the two sides of the annular groove 18, thereby limiting the top column bolt 13 from being screwed out, ensuring that the circuit breaker body 1 in the closed state is stuck with the top column bolt 13, preventing non-operating personnel from removing the top column bolt 13 on other circuit breaker bodies 1 in the closed state in the meter box and closing the circuit breaker body 1 in the non-closed state, further improving the closing restriction effect of the circuit breaker body 1 and improving the safety of the operator.

[0038] The push-up assembly includes two fixed blocks 19 fixed on the inner wall of the circuit breaker body 1. A circular hole is opened on the fixed block 19, and a round rod 20 is slidably arranged in the circular hole. The upper end of the round rod 20 is fixedly connected to the lower surface of the second inclined plate 14. A push-up spring 21 is sleeved on the round rod 20. The two ends of the push-up spring 21 are respectively against the lower surface of the second inclined plate 14 and the upper surface of the fixed block 19; the push-up spring 21 can push the second inclined plate 14 upward, driving the two limit plates 16 to be stuck in the annular groove 18, and the two push-up springs 21 are symmetrically distributed, and the second inclined plate 14 moves up and down more smoothly.

[0039] The prompt mechanism includes a soft plate 24, a locking assembly and a linkage assembly. An L-shaped slot 22 is provided on the side wall of the circuit breaker body 1, and a viewport 23 is provided at the front end of the circuit breaker body 1. The viewport 23 is connected to the L-shaped slot 22. The soft plate 24 is slidably arranged in the L-shaped slot 22, and a prompt slogan 25 is provided on the upper surface of the soft plate 24. A shift block 26 is fixed to the lower end of the soft plate 24. When the operator disconnects the circuit breaker body 1, the shift block 26 can be used to slide the soft plate 24 downward along the L-shaped slot 22 so that the prompt slogan 25 is aligned with the viewport 23. Non-operating personnel can see the prompt slogan 25 when closing the circuit breaker, thereby stopping the closing operation, further reducing the possibility of electric shock for the operator.

[0040] The locking assembly includes several fixing rods 27, which are fixed to the lower end of the soft plate 24, and the several fixing rods 27 are evenly spaced. A limiting groove 28 is provided at the upper end of the shift lever 2, and the limiting groove 28 is aligned with the lower end of the L-shaped slide groove 22; when the operator slides the soft plate 24 downward, the lower end of the fixing rod 27 can be inserted into the limiting groove 28, and the rotation of the shift lever 2 is restricted, preventing the closing of the switch, forcing non-operating personnel to shift the soft plate 24 when closing the switch, preventing non-operating personnel from not seeing the prompt sign 25, providing double protection for the closing operation and improving safety.

[0041] The linkage assembly includes two slide bars 29. Two symmetrically distributed slide holes are provided on both sides of the front end of the circuit breaker body 1, and the slide holes are located on both sides of the shift rod 2. The slide bars 29 are slidably inserted into the slide holes. The upper ends of the two slide bars 29 are fixed with a first cross bar 30, and the lower ends of the two slide bars 29 are fixed with a second cross bar 31, and the second cross bar 31 is abutted against the upper end of the top column bolt 13. A linkage spring 32 is sleeved on the slide bar 29, and the two ends of the linkage spring 32 are abutted against the outer wall of the circuit breaker body 1 and the second cross bar 31; when the operator unscrews the top column bolt 13, the linkage spring 32 pushes the second cross bar 31, the first cross bar 30 and the slide bar 29 downward. At this time, the first cross bar 30 drives the shift block 26 to move downward, and then drives the soft board 24 to move, preventing the operator from forgetting to shift the soft board 24, making the operation more convenient.

[0042] The above fixing methods are the most commonly used fixing connection methods in this field, such as welding, bolt connection, etc.

[0043] Working principle of the present invention:

[0044] When the operator pushes the lever 2 downward to disconnect the circuit breaker body 1, the protrusion 3 is inserted into the groove 5 and pushes the second inclined plate 14 downward, so that the limit plate 16 disengages from the annular groove 18, and the limit hole 4 is aligned with the limit block 7. At this time, the operator can unscrew the top column bolt 13. Under the action of the limit spring 11, the flat plate 10, the first inclined plate 9, the moving frame 8 and the limit block 7 are pushed upward, and the end of the limit block 7 is inserted into the limit hole 4. The limit block 7 locks the protrusion 3 to prevent the lever 2 from being pushed upward. Only when the operator screws the top column bolt 13 into the threaded hole 12 again and moves the first inclined plate 9 and the limit block 7 downward can the circuit breaker body 1 be closed. Moreover, when the lever 2 is pushed upward, the protrusion 3 is separated from the second inclined plate 14, and the second inclined plate 14 is pushed upward by the push-up assembly and drives the two connecting plates 15 and the two limit plates 16 to move upward. When the operator unscrews the top column bolt 13, the linkage spring 32 pushes the second cross bar 31, the first cross bar 30 and the sliding bar 29 downward. At this time, the first cross bar 30 drives the shift block 26 to move downward, and then drives the soft board 24 to move, so that the prompt sign 25 is aligned with the viewport 23. The non-operating personnel can see the prompt sign 25 when closing the circuit breaker, thereby stopping the closing operation, further reducing the possibility of electric shock for the operator, preventing the circuit breaker body 1 from being closed by other personnel when the operator is not on site, and improving the safety of the operator when repairing the circuit.

[0045] The above describes in detail the preferred embodiments of this patent, but this patent is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of this patent.

Claims

1. A circuit breaker with a closing restriction effect, comprising a circuit breaker body (1), wherein a lever (2) is rotatably provided on the circuit breaker body (1), characterized in that: A protrusion (3) is fixed below the shift lever (2), a limiting hole (4) is provided on the protrusion (3), a groove (5) is provided on the side wall of the circuit breaker body (1), and the groove (5) is located directly below the protrusion (3), a limiting mechanism is provided in the circuit breaker body (1), the limiting mechanism includes a clamp (6) fixed on the inner wall of the circuit breaker body (1), a limiting block (7) is slidably provided on the clamp (6), a moving frame (8) is fixed at the lower end of the limiting block (7), a first inclined plate (9) is fixed at the bottom of the moving frame (8), a flat plate (10) is fixed at the upper end of the first inclined plate (9), a limiting spring (11) is fixed between the flat plate (10) and the inner wall of the bottom of the circuit breaker body (1), a threaded hole (12) is provided on the side wall of the circuit breaker body (1), and a top column bolt (13) is threadedly connected in the threaded hole (12), and the top column bolt (13) passes through the moving frame (8). The inner side of the frame (8) is provided with a prompt mechanism at the side end of the circuit breaker body (1), and the inner side of the circuit breaker body (1) is provided with a locking mechanism, the locking mechanism comprising a second inclined plate (14) and two limit plates (16), the second inclined plate (14) is slidably arranged on the inner wall of the circuit breaker body (1), and a push-up assembly is provided between the second inclined plate (14) and the inner wall of the circuit breaker body (1), the second inclined plate (14) is located directly below the protrusion (3), and a through hole (17) is provided on the second inclined plate (14), the through hole (17) is aligned with the limit block (7), both ends of the second inclined plate (14) are fixed with connecting plates (15), the two limit plates (16) are respectively fixed to the lower ends of the two connecting plates (15), the end of the top column bolt (13) is provided with an annular groove (18), and the limit plate (16) is aligned with the annular groove (18).

2. A circuit breaker with a closing restriction effect according to claim 1, characterized in that: The push-up assembly comprises two fixed blocks (19) fixed on the inner wall of the circuit breaker body (1), a circular hole is opened on the fixed block (19), a round rod (20) is slidably arranged in the circular hole, the upper end of the round rod (20) is fixedly connected to the lower surface of the second inclined plate (14), and a push-up spring (21) is sleeved on the round rod (20), and the two ends of the push-up spring (21) are respectively against the lower surface of the second inclined plate (14) and the upper surface of the fixed block (19).

3. A circuit breaker with a closing restriction effect according to claim 2, characterized in that: The prompt mechanism comprises a soft plate (24), a locking assembly and a linkage assembly; an L-shaped slide groove (22) is provided on the side wall of the circuit breaker body (1); a viewport (23) is provided at the front end of the circuit breaker body (1); and the viewport (23) is communicated with the L-shaped slide groove (22); the soft plate (24) is slidably arranged in the L-shaped slide groove (22); a prompt slogan (25) is provided on the upper surface of the soft plate (24); and a shift block (26) is fixed to the lower end of the soft plate (24).

4. A circuit breaker with a closing restriction effect according to claim 3, characterized in that: The locking assembly includes a plurality of fixing rods (27), the fixing rods (27) being fixed to the lower end of the soft plate (24), and the plurality of fixing rods (27) being distributed at equal intervals, and a limiting groove (28) being provided at the upper end of the shifting rod (2), and the limiting groove (28) being aligned with the lower end of the L-shaped sliding groove (22).

5. A circuit breaker with a closing restriction effect according to claim 4, characterized in that: The linkage assembly includes two slide bars (29), two symmetrically distributed slide holes are opened on both sides of the front end of the circuit breaker body (1), and the slide holes are located on both sides of the shift rod (2), the slide bars (29) are slidably inserted into the slide holes, the upper ends of the two slide bars (29) are fixed with a first cross bar (30), the lower ends of the two slide bars (29) are fixed with a second cross bar (31), and the second cross bar (31) is abutted against the upper end of the top column bolt (13), and a linkage spring (32) is sleeved on the slide bar (29), and the two ends of the linkage spring (32) are distributed and abutted against the outer wall of the circuit breaker body (1) and the second cross bar (31).

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