Five-prevention locking device and circuit breaker

Abstract

The utility model relates to a five-prevention locking device and a circuit breaker. The five-prevention locking device comprises a panel and a supporting plate which are vertically arranged in parallel, a sliding plate which is arranged between the panel and the supporting plate in an up-down sliding mode, a closing interlocking mechanism, a grounding opening and closing mechanism and an isolation opening and closing mechanism. The sliding plate is fixedly provided with a deflector rod, a grounding interlocking hole and an isolation interlocking hole, the top of the right end of the sliding plate is provided with a concession platform, and the bottom of the sliding plate is connected with a vertical lock rod; the panel is provided with a gear groove, a grounding operation hole and an isolation operation hole. The distance between the grounding interlocking hole and the isolation interlocking hole is smaller than the distance between the grounding operation hole and the isolation operation hole. The circuit breaker is provided with the five-prevention locking device. The five-prevention locking device and the circuit breaker are simple in structure, convenient to operate, high in reliability and high in safety.

Description

Technical Field

[0001] This utility model relates to a five-prevention interlocking device and a circuit breaker, belonging to the field of power equipment technology. Background Technology

[0002] "Five preventions" is a general term for five types of anti-misoperation functions that electrical equipment should have to ensure personal safety. It is one of the important measures for power safety. Specifically, it includes: preventing accidental opening and closing of circuit breakers; preventing opening and closing of isolating switches under load; preventing accidental entry into energized compartments; preventing closing of grounding switches under load; and preventing the supply of load when the grounding switch is closed.

[0003] Existing five-proof locks have complex structures, are inconvenient to operate, and have low reliability, posing many safety hazards. In addition, existing five-proof locking mechanisms can be forcibly opened, which can easily lead to misoperation and defeat the purpose of the five-proof lock.

[0004] Therefore, there is an urgent need for a five-proof interlocking device and circuit breaker that is simple in structure, easy to operate, highly reliable, and highly safe. Summary of the Invention

[0005] The purpose of this utility model is to overcome the above-mentioned shortcomings and provide a five-proof interlocking device and circuit breaker that is simple in structure, easy to operate, highly reliable, and highly safe.

[0006] The purpose of this utility model is achieved as follows:

[0007] A five-proof interlocking device includes a vertically parallel panel and a support plate, a sliding plate that slides vertically between the panel and the support plate, and a closing interlocking mechanism for closing the circuit breaker, a grounding opening and closing mechanism for grounding opening and closing, and an isolation opening and closing mechanism for isolation opening and closing, which are sequentially rotated on the support plate.

[0008] The slide plate is fixedly equipped with a lever to control the up and down movement of the slide plate, and a grounding interlock hole and an isolation interlock hole are opened vertically in sequence. A yielding platform is set at the top right end of the slide plate, and a vertical locking rod is connected to the bottom of the slide plate. The yielding platform is used to unlock the closing interlocking mechanism of the circuit breaker to perform the circuit breaker closing operation. The vertical locking rod cooperates with the fixed locking hole installed on the circuit breaker cabinet door to control the safe opening and closing of the circuit breaker cabinet door.

[0009] The panel is provided with a slot for sliding the lever, a grounding operation hole for operating the grounding switch, and an isolation operation hole for operating the isolation switch. The slot is provided with four positions from top to bottom: interlock, grounding, isolation, and vacuum. The lever is slid between different positions to unlock the corresponding switch operation.

[0010] The distance between the grounding interlock hole and the isolation interlock hole is less than the distance between the grounding operation hole and the isolation operation hole; when the grounding interlock hole and the grounding operation hole are in the same position, the grounding opening and closing mechanism is unlocked for grounding opening and closing operation; when the isolation interlock hole and the isolation operation hole are in the same position, the isolation opening and closing mechanism is unlocked for isolation opening and closing operation.

[0011] Furthermore, the closing interlocking mechanism includes an interlocking baffle rotatably mounted on a support plate, a circuit breaker opening / closing indicator plate connected to the circuit breaker opening / closing shaft, and a closing interlocking plate connected to the circuit breaker closing shaft. The lower end of the interlocking baffle is hinged to the support plate via a first tension spring, and the upper end is hinged to the circuit breaker opening / closing indicator plate via a second tension spring. The closing interlocking plate has a protrusion that cooperates with the lower end of the interlocking baffle to lock the circuit breaker closing operation. When the sliding plate descends to a position where the retraction platform is lower than the lower end of the interlocking baffle, it is pulled by the first tension spring, causing the interlocking baffle to deflect clockwise, allowing the closing interlocking plate to rotate and unlocking the circuit breaker closing operation.

[0012] Furthermore, the corner of the retreat platform is provided with an inclined surface for guiding the lower end of the interlocking baffle to deflect the interlocking baffle.

[0013] Furthermore, the circuit breaker opening / closing indicator plate is provided with an interlocking rod to limit the upward sliding of the slide plate after the circuit breaker is closed.

[0014] Furthermore, the grounding switching mechanism includes a grounding transmission gear rotatably mounted on a support plate and a grounding switching gear connected to the grounding switching shaft of the circuit breaker; the grounding transmission gear meshes with the grounding switching gear; the grounding transmission gear is provided with a grounding operation cavity for controlling its own rotation, and the grounding operation cavity corresponds to the position of the grounding operation hole; by inserting an operating key into the grounding operation cavity through the grounding operation hole, the grounding transmission gear is controlled to rotate, thereby driving the grounding switching gear to rotate, realizing the grounding switching of the circuit breaker.

[0015] Furthermore, the isolation and opening / closing mechanism includes an isolation transmission gear rotatably mounted on a support plate and an isolation opening / closing gear connected to the circuit breaker's isolation and opening / closing shaft; the isolation transmission gear meshes with the isolation opening / closing gear; the isolation transmission gear is provided with an isolation operating cavity for controlling its own rotation, and the isolation operating cavity corresponds to the position of the isolation operating hole; by inserting an operating key into the isolation operating cavity through the isolation operating hole, the isolation transmission gear is controlled to rotate, thereby driving the isolation opening / closing gear to rotate, thus realizing the isolation and opening / closing of the circuit breaker.

[0016] Furthermore, the support plate is equipped with an electromagnetic lock to restrict the vertical movement of the slide plate.

[0017] Furthermore, the support plate and the slide plate are connected by guide grooves and guide posts to enable the slide plate to slide vertically.

[0018] Furthermore, mounting columns are provided on the support plate, and the panel is fixed to the mounting columns by bolts.

[0019] A circuit breaker equipped with any of the above-mentioned five-proof interlocking devices.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] This utility model features a five-proof interlocking device, employing a sandwich structure with a sliding plate between a panel and a support plate. A clearance platform on the sliding plate, in conjunction with a closing interlocking mechanism, unlocks the circuit breaker when closed. Grounding and isolation interlocking holes are provided, respectively cooperating with grounding and isolation operating holes on the panel. Combined with grounding and isolation mechanisms, this enables the locking and unlocking of the grounding switch and the isolation switch. Furthermore, each slide of the sliding plate unlocks only one function, achieving interlocking and unlocking between functions, ensuring no operational errors lead to safety issues. The overall structure is simple, easy to operate, highly reliable, and highly safe.

[0022] The circuit breaker of this utility model adopts the five-proof interlocking device to realize the opening and closing operation of the circuit breaker, which has the advantages of simple structure, convenient operation, high reliability and high safety. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of a five-proof locking device according to the present invention.

[0024] Figure 2 This is a schematic diagram of the panel structure of a five-proof locking device according to the present invention.

[0025] Figure 3 This is a schematic diagram of the grounding position of a five-proof interlocking device according to this utility model.

[0026] Figure 4 This is a schematic diagram of the grounding and switching operation of a five-proof interlocking device according to this utility model.

[0027] Figure 5 This is a schematic diagram of the isolation gear position of a five-proof interlocking device according to this utility model.

[0028] Figure 6 This is a schematic diagram of the isolation and opening / closing operation of a five-proof interlocking device according to this utility model.

[0029] Figure 7 This is a schematic diagram of the vacuum position state of a five-proof locking device according to this utility model.

[0030] Figure 8 This is a schematic diagram of the circuit breaker opening and closing operation of a five-prevention interlocking device according to this utility model.

[0031] Figure 9 This is a schematic diagram of the installation structure of a circuit breaker according to the present invention.

[0032] in:

[0033] 1. Support plate; 2. Panel; 3. Slide plate; 4. Closing interlocking mechanism; 5. Grounding switching mechanism; 6. Isolation switching mechanism; 7. Fixed lock hole; 8. Electromagnetic lock; 9. Protruding block.

[0034] Guide groove 11, guide column 12, mounting column 13, stop groove 21, grounding operation hole 22, isolation operation hole 23, lever 31, grounding interlock hole 32, isolation interlock hole 33, yielding platform 34, vertical locking rod 35, limit plate 36, inclined surface 37, interlock baffle 41, circuit breaker opening and closing indicator plate 42, closing interlock plate 43, first tension spring 44, second tension spring 45, interlock rod 46, grounding transmission gear 51, grounding opening and closing gear 52, grounding operation cavity 53, isolation transmission gear 61, isolation opening and closing gear 62, isolation operation cavity 63. Detailed Implementation Example 1

[0035] See Figures 1-9 The present invention relates to a five-proof interlocking device, comprising a panel 2 and a support plate 1 arranged in parallel, a sliding plate 3 arranged vertically between the panel 2 and the support plate 1, a closing interlocking mechanism 4 for closing the circuit breaker, a grounding opening and closing mechanism 5 for grounding opening and closing, and an isolation opening and closing mechanism 6 for isolation opening and closing.

[0036] The panel 2 is vertically provided with a position slot 21, a grounding operation hole 22 for operating the grounding switch, and an isolation operation hole 23 for operating the isolation switch. The position slot 21 is provided with four positions from top to bottom: interlock, grounding, isolation, and vacuum. The opening and closing interlocking status of each position is as follows:

[0037] Interlock position: Cabinet door opening and closing unlocks, grounding switch opening and closing, isolation switch opening and closing, and circuit breaker closing are all locked. In this state, the cabinet door can only be safely opened and closed.

[0038] Grounding position: Grounding switch opening and closing is unlocked, and the cabinet door, isolating switch opening and closing, and circuit breaker closing are all locked. In this state, only the grounding switch can be opened and closed.

[0039] Isolation position: Isolation switch opening and closing is unlocked, cabinet door, grounding switch opening and closing, and circuit breaker closing are all locked. In this state, only the opening and closing of the isolating switch can be operated.

[0040] Vacuum position: The circuit breaker is unlocked when closed, and the cabinet door, grounding switch, and isolating switch are all locked. Only the circuit breaker can be closed in this state.

[0041] The five-proof interlocking functions of each of the above gear positions are achieved through the mutual cooperation between panel 2, slide plate 3, closing interlocking mechanism 4, grounding opening and closing mechanism 5, and isolation opening and closing mechanism 6;

[0042] Specifically, the slide plate 3 is fixedly equipped with a lever 31 for controlling the up and down movement of the slide plate 3, and a grounding interlock hole 32 and an isolation interlock hole 33 are vertically opened in sequence. A relief platform 34 is set at the top right end of the slide plate 3, and a vertical locking rod 35 is connected to the bottom of the slide plate. The lever 31 is slidably embedded in the gear slot 21. By sliding the lever 31 between different gears, the slide plate 3 is driven to move up and down, thereby realizing the unlocking and locking operation of the corresponding gear opening and closing operation.

[0043] The grounding interlock hole 32 and the isolation interlock hole 33 respectively cooperate with the grounding operation hole 22 and the isolation operation hole 23 on the panel 2 to realize the locking and unlocking of the grounding and disconnecting switches. When the grounding interlock hole 32 and the grounding operation hole 22 are in the same position, the grounding opening and closing mechanism 5 is unlocked for grounding opening and closing operations; when the isolation interlock hole 33 and the isolation operation hole 23 are in the same position, the isolation opening and closing mechanism 6 is unlocked for isolation opening and closing operations. To ensure that the grounding operation hole 22 and the isolation operation hole 23 do not open and unlock at the same time, the distance between the grounding interlock hole 32 and the isolation interlock hole 33 is smaller than the distance between the grounding operation hole 22 and the isolation operation hole 23, so that only one set of holes can be in the same position at the same time, while the other set of holes cannot be in the same position.

[0044] The working principles of the grounding switching mechanism 5 and the isolation switching mechanism 6 are similar. Specifically, the grounding switching mechanism 5 includes a grounding transmission gear 51 rotatably mounted on the support plate 1 and a grounding switching gear 52 connected to the grounding switching shaft of the circuit breaker. The grounding transmission gear 51 and the grounding switching gear 52 are meshed together. The grounding transmission gear 51 is provided with a grounding operation cavity 53 for controlling the rotation of the gear itself with an operating key. The grounding operation cavity 53 corresponds to the position of the grounding operation hole 22. By inserting the operating key into the grounding operation cavity 53 through the grounding operation hole 22, the grounding transmission gear 51 is controlled to rotate, thereby driving the grounding switching gear 52 to rotate, thus realizing the grounding switching of the circuit breaker. The isolation and opening / closing mechanism 6 includes an isolation transmission gear 61 rotatably mounted on a support plate 1 and an isolation opening / closing gear 62 connected to the circuit breaker's isolation and opening / closing shaft. The isolation transmission gear 61 and the isolation opening / closing gear 62 are meshed together. The isolation transmission gear 61 is provided with an isolation operation cavity 63 for controlling its own rotation. The isolation operation cavity 63 corresponds to the position of the isolation operation hole 23. An operation key is inserted into the isolation operation cavity 63 through the isolation operation hole 23 to control the rotation of the isolation transmission gear 61, thereby driving the isolation opening / closing gear 62 to rotate and realize the isolation and opening / closing of the circuit breaker. The sliding plate 3 drives the grounding interlock hole 32 and the isolation interlock hole 33 to move up and down synchronously. In conjunction with the grounding operation hole 22 and the isolation operation hole 23 on the panel 2, only one operation hole can be exposed at any given time for the operation key to be inserted, thereby realizing the unlocking and interlocking of the grounding switch and the isolation switch. Furthermore, the grounding transmission gear 51, the grounding engagement gear 52, the isolation transmission gear 61, and the isolation engagement gear 62 are all half gears, which limit the torsion angle. At the same time, protruding blocks 9 are provided on the grounding transmission gear 51 and the isolation transmission gear 61, which cooperate with the limiting plate 36 provided on the sliding plate 3 to block the movement of the sliding plate 3 and realize the interlocking function. That is, after rotating the grounding transmission gear 51 or the isolation transmission gear 61, the protruding block 9 changes position, thereby blocking the sliding of the limiting plate 36 and the sliding plate 3, thus realizing the interlocking between functions.

[0045] The retraction platform 34 is used to unlock the closing interlock mechanism 4 of the circuit breaker for circuit breaker closing operation. It moves using the sliding plate 3. When the retraction platform 34 moves to the position of the closing interlock mechanism 4, it creates space for unlocking, thus enabling the circuit breaker to close and unlock. Specifically, the closing interlock mechanism 4 includes an interlock baffle 41 rotatably mounted on the support plate 1, a circuit breaker opening / closing indicator plate 42 connected to the circuit breaker opening / closing shaft, and a closing interlock plate 43 connected to the circuit breaker closing shaft. The lower end of the interlock baffle 41 is hinged to the support plate 1 via a first tension spring 44, and the upper end is hinged to the circuit breaker opening / closing indicator plate 42 via a second tension spring 45. The closing interlock plate 43 has a protrusion that blocks the lower end of the interlock baffle 41. In coordination, the circuit breaker closing operation is locked; when the sliding plate 3 descends to the lower end of the retraction platform 34 below the interlocking baffle 41, it is pulled by the first tension spring 44, causing the interlocking baffle 41 to deflect clockwise, allowing the closing interlocking plate 43 to rotate, thus enabling the circuit breaker closing knob to rotate clockwise for closing and unlocking the circuit breaker closing operation; at the corner of the retraction platform 34, there is an inclined surface 37 for guiding the lower end of the interlocking baffle 41 so that the interlocking baffle 41 can deflect smoothly;

[0046] The vertical locking rod 35 cooperates with the fixed locking hole 7 installed on the circuit breaker cabinet door to control the safe opening and closing of the circuit breaker cabinet door; when the slide plate 3 moves downward, the vertical locking rod 35 inserts into the fixed locking hole 7, making the cabinet door unable to open; conversely, when the vertical locking rod 35 disengages from the fixed locking hole 7, the cabinet door is unlocked.

[0047] Furthermore, the support plate 1 is equipped with an electromagnetic lock 8 to restrict the vertical movement of the slide plate 3. During power-on operation, when the lever 31 moves the slide plate 3 from the ground position to the isolation position, the electromagnetic lock 8 closes and the lock core extends, which can prevent the slide plate 3 from retracting to the ground position, thus realizing operation interlocking. During power-off operation, when the lever 31 moves the slide plate 3 from the isolation position to the ground position, the electromagnetic lock 8 must be opened first so that the slide plate 3 can slide upward smoothly.

[0048] The support plate 1 and the slide plate 3 are connected by a guide groove 11 and a guide post 12 to enable the slide plate 3 to slide vertically, ensuring that the slide plate 3 slides smoothly vertically, while limiting the vertical sliding distance of the slide plate 3; the support plate 1 is provided with a mounting post 13, and the panel 2 is fixed to the mounting post 13 by bolts;

[0049] This utility model adopts a sandwich structure with a sliding plate 3 slidably set between the panel 2 and the support plate 1. The sliding plate 3 has a relief platform 34 that cooperates with the closing interlocking mechanism 4 to unlock the circuit breaker when it is closed. It is provided with grounding interlocking hole 32 and isolation interlocking hole 33, which cooperate with the grounding operation hole 22 and isolation operation hole 23 on the panel 2, respectively. Combined with the grounding opening and closing mechanism 5 and the isolation opening and closing mechanism 6, it realizes the locking and unlocking of the grounding switch and the isolation switch. At the same time, each slide of the sliding plate 3 unlocks only one function, realizing the locking and unlocking and interlocking between functions, ensuring that no safety problems will be caused by operational errors. The overall structure is simple, easy to operate, highly reliable and safe.

[0050] The specific operation methods for the five-proof interlock include two methods: power-on operation and power-off operation. The specific operation steps are as follows:

[0051] A. Power-on operation procedure: Move lever 31 sequentially between interlock, grounding, isolation, and vacuum;

[0052] A1. Close the circuit breaker cabinet door; at this time, the cabinet door opening and closing is unlocked, and the grounding switch, isolating switch, and circuit breaker closing are all locked.

[0053] When the lever 31 is in the interlock position, the vertical locking lever 35 is disengaged from the fixed locking hole 7 installed on the circuit breaker cabinet door, and the cabinet door is in the unlocked state and can be opened and closed freely; the grounding operation hole 22 and the isolation operation hole 23 are both blocked by the sliding plate 3 and are in the locked state; the closing interlocking mechanism 4 is blocked by the vertical side of the sliding plate 3 and is in the locked state.

[0054] A2. Switch to the grounding position; at this time, the grounding switch is unlocked, and the cabinet door, isolating switch, and circuit breaker closing are all locked.

[0055] Slide lever 31 down from the interlock position to the grounding position, vertical locking lever 35 is inserted downward into fixed lock hole 7, locking the cabinet door and preventing it from being opened; simultaneously, the grounding interlock hole 32 of the slide plate 3 slides down to the grounding operation hole 22, allowing the operating key to be inserted sequentially into the grounding operation hole 22, grounding interlock hole 32, and then into the grounding opening and closing mechanism 5, i.e., the operating key can be inserted into the operating cavity 53 of the grounding transmission gear 51, unlocking the grounding opening and closing mechanism, and rotating the operating key interface to open and close the grounding switch; the isolation operation hole 23 remains blocked by the slide plate 3 and is in a locked state; the lower end of the interlocking baffle 41 of the closing interlocking mechanism 4 remains blocked by the vertical side of the slide plate 3 and is in a locked state;

[0056] A3. Grounding switch; Insert the operating key into the grounding operation hole 22 and drive the grounding switching mechanism 5 to open the grounding switch. The grounding transmission gear 51 deflects accordingly, and its protruding block 9 changes position to block the limit plate 36 and the slide plate 3 from sliding upward. At this time, the lever 31 can no longer slide upward to the interlock position.

[0057] A4. Switch to the isolation position; at this time, the isolation switch is unlocked, and the cabinet door, grounding switch, and circuit breaker closing are all locked.

[0058] Slide lever 31 down from the grounding position to the isolation position, and vertical locking lever 35 continues to be inserted down into the fixing lock hole 7, locking the cabinet door and preventing it from being opened; the isolation interlock hole 33 slides down to the isolation operation hole 23 position, allowing the operating key to be inserted sequentially into the isolation operation hole 23, the isolation interlock hole 33, and the isolation opening and closing mechanism 6, unlocking the isolation opening and closing mechanism; the grounding interlock hole 32 disengages from the grounding operation hole 22, causing the grounding operation hole 22 to be blocked by the sliding plate 3 and locked; the closing interlock mechanism 4 is blocked by the vertical side of the sliding plate 3 and locked.

[0059] In this embodiment, after executing A4 to switch to the isolation position, the solenoid valve 8 is locked to prevent the slide plate 3 from sliding upward and backward.

[0060] A5. Close the isolating switch; insert the operating key into the isolating operation hole 23 and drive the isolating opening and closing mechanism 6 to close the isolating switch. The isolating transmission gear 61 deflects accordingly, and its protruding block 9 changes position to block the limit plate 36 and the sliding plate 3 from sliding upward. At this time, the lever 31 can no longer slide upward to the ground position.

[0061] A6. Switch to the vacuum position; at this time, the circuit breaker closing is in the unlocked state, and the cabinet door, grounding switch, and isolating switch are all in the locked state.

[0062] Slide lever 31 down from the isolation position to the vacuum position, and vertical locking lever 35 continues to be inserted down into the fixing lock hole 7, locking the cabinet door and preventing it from being opened; grounding interlock hole 32 and isolation interlock hole 33 disengage from grounding operation hole 22 and isolation operation hole 23 respectively, so that grounding operation hole 22 and isolation operation hole 23 are blocked by sliding plate 3 and are in a locked state; the retraction platform 34 at the top of sliding plate 3 causes closing interlock plate 43 to deflect clockwise under the tension of first tension spring 44, and the rotation space of closing interlock plate 43 allows the circuit breaker closing knob to rotate clockwise to close the circuit breaker, thereby unlocking the circuit breaker closing operation;

[0063] A7. Close the vacuum circuit breaker; rotate the circuit breaker closing knob to close the circuit breaker. The circuit breaker opening / closing indicator plate 42 deflects counterclockwise due to the circuit breaker closing, increasing the tension of the second tension spring 45, which pulls the interlocking baffle 41 and causes it to deflect counterclockwise, blocking the closing interlocking plate 43 again, thus restoring the circuit breaker to the locked state. At the same time, the counterclockwise deflection of the circuit breaker opening / closing indicator plate 42 causes the interlocking rod 46 to block the top left end of the sliding plate 3, preventing the sliding plate 3 from sliding upward and preventing the sliding plate 3 from retracting to the isolation position. That is, after the circuit breaker is closed, only the circuit breaker opening can be operated, and other operating switches cannot be operated, thus achieving the function of interlocking.

[0064] B. Power outage operation procedure: Move lever 31 sequentially between vacuum, isolation, grounding, and interlock;

[0065] B1. Open the vacuum circuit breaker; rotate the circuit breaker opening knob, the circuit breaker opens, the circuit breaker opening / closing indicator plate 42 deflects clockwise due to the internal opening of the circuit breaker, causing the tension of the second tension spring 45 to decrease. At this time, the closing interlock plate 43 deflects clockwise under the tension of the first tension spring 44, and the circuit breaker is in the unlocked state when closed; at the same time, the clockwise deflection of the circuit breaker opening / closing indicator plate 42 causes the interlock rod 46 to release the lock on the top left end of the slide plate 3, allowing the slide plate 3 to slide upward;

[0066] B2. Switch to the isolation position; at this time, the isolation switch is unlocked, and the cabinet door, grounding switch, and circuit breaker closing are all locked.

[0067] Slide lever 31 from the vacuum position to the isolation position. Vertical locking lever 35 remains in the fixed lock hole 7, locking the cabinet door and preventing it from opening. Isolation interlock hole 33 slides up to the isolation operation hole 23 position, allowing the operating key to be inserted sequentially into isolation operation hole 23, isolation interlock hole 33, and then into isolation opening / closing mechanism 6, unlocking the isolation opening / closing mechanism. Grounding interlock hole 32 remains detached from grounding operation hole 22, causing grounding operation hole 22 to be blocked by sliding plate 3 and locked. Closing interlock mechanism 4 is blocked by the vertical side of sliding plate 3 and locked.

[0068] B3. Disconnect the isolating switch; Insert the operating key into the isolating operation hole 23 and drive the isolating opening and closing mechanism 6 to close the isolating switch. The isolating transmission gear 61 deflects accordingly, and its protruding block 9 changes position to block the limit plate 36 and the sliding plate 3 from sliding downward. At this time, the lever 31 can no longer slide downward to the vacuum position.

[0069] In this embodiment, after the B3 disconnect switch is activated, the solenoid valve 8 is unlocked, allowing the slide plate 3 to continue sliding upward.

[0070] B4. Switch to the grounding position; at this time, the grounding switch is unlocked, and the cabinet door, isolating switch, and circuit breaker closing are all locked.

[0071] Slide lever 31 from the isolation position to the grounding position. Vertical locking lever 35 remains in the fixed lock hole 7, locking the cabinet door and preventing it from opening. Simultaneously, the grounding interlock hole 32 slides up to the grounding operation hole 22, allowing the operating key to be inserted sequentially into the grounding operation hole 22, grounding interlock hole 32, and grounding switching mechanism 5, unlocking the grounding switching mechanism. The isolation operation hole 23 is blocked by sliding plate 3 and remains locked. The closing interlock mechanism 4 is blocked by the vertical side of sliding plate 3 and remains locked.

[0072] B5. Close the grounding switch; insert the operating key into the grounding operation hole 22 and drive the grounding opening and closing mechanism 5 to close the grounding switch. The grounding transmission gear 51 deflects accordingly, and its protruding block 9 changes position to block the limit plate 36 and the slide plate 3 from sliding downward. At this time, the lever 31 can no longer slide downward to the isolation position.

[0073] B6. Switch to the interlock position; at this time, the cabinet door opening and closing is unlocked, and the grounding switch, isolation switch, and circuit breaker closing are all locked.

[0074] Slide lever 31 from the grounding position to the interlocking position. At this time, vertical locking lever 35 disengages from fixed locking hole 7, and cabinet door is in the unlocked state, allowing safe opening and closing of cabinet door; grounding operation hole 22 and isolation operation hole 23 are both blocked by sliding plate 3 and are in the locked state; closing interlocking mechanism 4 is blocked by the vertical side of sliding plate 3 and is in the locked state.

[0075] B7. Open the circuit breaker cabinet door.

[0076] The five-proof interlocking method of this utility model, through the cooperation of the sliding plate and closing interlocking mechanism 4, grounding opening and closing mechanism 5, and isolation opening and closing mechanism 6 in the five-proof interlocking device of Embodiment 1, cleverly sets corresponding and matching yielding platforms 34, grounding interlocking holes 32 and isolation interlocking holes 33 on the sliding plate 3, realizes the interlocking and unlocking of each operation step, making the power-on and power-off operation of the circuit breaker simpler and more convenient, significantly improving the safety of circuit breaker operation, and has good prospects for industry promotion and application. Example 2

[0077] See Figure 9 (Panel 2 is not shown in the figure) The circuit breaker of this utility model is equipped with the five-proof interlocking device of the embodiment 1, and has the technical characteristics of simple structure, convenient operation, high reliability and high safety.

[0078] Additionally, it should be noted that the above-described specific implementation is merely an optimized solution of this patent, and any modifications or improvements made by those skilled in the art based on the above concept are within the scope of protection of this patent.

Claims

1. A five-proof interlocking device, characterized in that: It includes a vertically parallel panel (2) and a support plate (1), a sliding plate (3) that slides up and down between the panel (2) and the support plate (1), a closing interlocking mechanism (4) for closing the circuit breaker, a grounding opening and closing mechanism (5) for grounding opening and closing, and an isolation opening and closing mechanism (6) for isolation opening and closing. The slide plate (3) is fixedly equipped with a lever (31) for controlling the up and down movement of the slide plate (3), and a grounding interlock hole (32) and an isolation interlock hole (33) are opened vertically in sequence. A retraction platform (34) is set at the top right end of the slide plate (3), and a vertical locking rod (35) is connected to the bottom of the slide plate. The retraction platform (34) is used to unlock the closing interlock mechanism (4) of the circuit breaker to perform the circuit breaker closing operation. The vertical locking rod (35) cooperates with the fixed locking hole (7) installed on the circuit breaker cabinet door to control the safe opening and closing of the circuit breaker cabinet door. The panel (2) is provided with a slot (21) for sliding the lever (31), a grounding operation hole (22) for operating the grounding opening and closing, and an isolation operation hole (23) for operating the isolation opening and closing; the slot (21) is provided with four positions from top to bottom: interlocking, grounding, isolation, and vacuum. The lever (31) is slid between different positions to unlock the opening and closing operation of the corresponding position; The distance between the grounding interlock hole (32) and the isolation interlock hole (33) is less than the distance between the grounding operation hole (22) and the isolation operation hole (23); When the grounding interlock hole (32) and the grounding operation hole (22) are in the same position, the grounding opening and closing mechanism (5) is unlocked for grounding opening and closing operation; when the isolation interlock hole (33) and the isolation operation hole (23) are in the same position, the isolation opening and closing mechanism (6) is unlocked for isolation opening and closing operation.

2. The five-proof interlocking device according to claim 1, characterized in that: The closing interlocking mechanism (4) includes an interlocking baffle (41) rotatably mounted on a support plate (1), a circuit breaker opening / closing indicator plate (42) connected to the circuit breaker opening / closing shaft, and a closing interlocking plate (43) connected to the circuit breaker closing shaft. The lower end of the interlocking baffle (41) is hinged to the support plate (1) via a first tension spring (44), and the upper end is hinged to the circuit breaker opening / closing indicator plate (42) via a second tension spring (45). The closing interlocking plate (43) is provided with a protrusion, which cooperates with the lower end of the interlocking baffle (41) to lock the circuit breaker closing operation. When the sliding plate (3) descends to the point where the yielding platform (34) is lower than the lower end of the interlocking baffle (41), it is pulled by the first tension spring (44), causing the interlocking baffle (41) to deflect clockwise, allowing the closing interlocking plate (43) to rotate and unlock the circuit breaker closing operation.

3. The five-proof interlocking device according to claim 2, characterized in that: The corner of the retreat platform (34) is provided with a ramp (37) for guiding the lower end of the interlocking baffle (41) to deflect the interlocking baffle (41).

4. The five-proof interlocking device according to claim 2, characterized in that: The circuit breaker opening and closing indicator plate (42) is provided with an interlocking rod (46) for limiting the upward sliding of the sliding plate (3) after the circuit breaker is closed.

5. The five-proof interlocking device according to claim 1, characterized in that: The grounding switching mechanism (5) includes a grounding transmission gear (51) rotatably mounted on a support plate (1) and a grounding switching gear (52) connected to the grounding switching shaft of the circuit breaker; the grounding transmission gear (51) and the grounding switching gear (52) are meshed together; the grounding transmission gear (51) is provided with a grounding operation cavity (53) for controlling its own rotation, and the grounding operation cavity (53) corresponds to the position of the grounding operation hole (22); By inserting the operating key into the grounding operating cavity (53) through the grounding operating hole (22), the grounding transmission gear (51) is controlled to rotate, thereby driving the grounding opening and closing gear (52) to rotate, thus realizing the grounding opening and closing of the circuit breaker.

6. The five-proof interlocking device according to claim 1, characterized in that: The isolation opening and closing mechanism (6) includes an isolation transmission gear (61) rotatably mounted on a support plate (1) and an isolation opening and closing gear (62) connected to the circuit breaker isolation opening and closing shaft; the isolation transmission gear (61) meshes with the isolation opening and closing gear (62); the isolation transmission gear (61) is provided with an isolation operation cavity (63) for controlling its own rotation, and the isolation operation cavity (63) corresponds to the position of the isolation operation hole (23); by inserting an operation key into the isolation operation cavity (63) through the isolation operation hole (23), the isolation transmission gear (61) is controlled to rotate, thereby driving the isolation opening and closing gear (62) to rotate, thus realizing the isolation opening and closing of the circuit breaker.

7. The five-proof interlocking device according to claim 1, characterized in that: The support plate (1) is equipped with an electromagnetic lock (8) to restrict the up and down movement of the slide plate (3).

8. The five-proof interlocking device according to claim 1, characterized in that: The support plate (1) and the slide plate (3) cooperate through the guide groove (11) and the guide post (12) to realize the vertical sliding of the slide plate (3).

9. The five-proof interlocking device according to claim 1, characterized in that: Mounting posts (13) are provided on the support plate (1), and the panel (2) is fixed to the mounting posts (13) by bolts.

10. A circuit breaker, characterized in that: It is equipped with any one of the five-proof interlocking devices according to claims 1 to 9.

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