Five-prevention locking device, locking method and circuit breaker

Abstract

The invention relates to a five-prevention locking device, a locking method and a circuit breaker. The five-prevention locking device comprises a panel, a supporting plate, a sliding plate, a switching-on interlocking mechanism, a grounding switching-on and switching-off mechanism and an isolation switching-on and switching-off mechanism, wherein the panel and the supporting plate are vertically arranged in parallel; the sliding plate is arranged between the panel and the supporting plate in an up-down sliding mode; 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 locking method is realized based on the five-prevention locking device and comprises power-on operation and power-off operation. The circuit breaker is provided with the five-prevention locking device. The five-prevention locking device, the locking method and the circuit breaker are simple in structure, convenient to operate, high in reliability and high in safety.

Description

Technical Field

[0001] The present invention relates to a five-prevention interlocking device, an interlocking method and a circuit breaker, belonging to the technical field of power equipment. Background Art

[0002] "Five-prevention" usually refers to the abbreviation of five anti-maloperation functions that electrical equipment should have to ensure personal safety, and it is one of the important measures for power safety. Specifically, it includes: preventing mis-tripping and mis-closing of the circuit breaker; preventing disconnection and connection of the isolating switch under load; preventing entering the live working space by mistake; preventing closing the earthing switch under load; preventing feeding the load when the earthing switch is closed.

[0003] The existing five-prevention locks have a complex structure, inconvenient operation and low reliability, and there are many potential safety hazards; in addition, the existing five-prevention interlocking mechanism has the problem that it can be forcibly opened, which is easy to cause misoperation and lose the meaning of the five-prevention lock.

[0004] Therefore, there is an urgent need for a five-prevention interlocking device and circuit breaker with a simple structure, convenient operation, high reliability and high safety, as well as a corresponding five-prevention interlocking method. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above deficiencies and provide a five-prevention interlocking device and circuit breaker with a simple structure, convenient operation, high reliability and high safety, as well as a corresponding five-prevention interlocking method.

[0006] The purpose of the present invention is achieved as follows: A five-prevention interlocking device includes a panel and a support plate arranged vertically in parallel, a sliding plate slidably arranged up and down between the panel and the support plate, a closing interlocking mechanism for closing the circuit breaker, an earthing switching mechanism for earthing switching, and an isolating switching mechanism for isolating switching, which are sequentially rotatably arranged on the support plate; A lever for controlling the up and down movement of the sliding plate is fixedly installed on the sliding plate, and an earthing interlocking hole and an isolating interlocking hole are sequentially opened vertically. A retreating platform is arranged at the top right end of the sliding plate, and a vertical locking rod is connected to the bottom of the sliding plate; the retreating platform is used to unlock the closing interlocking mechanism of the circuit breaker for closing the circuit breaker operation; the vertical locking rod cooperates with a fixed locking hole installed on the circuit breaker cabinet door to control the safe opening and closing of the circuit breaker cabinet door; A gear slot for slidably embedding the lever, an earthing operation hole for operating the earthing switching, and an isolating operation hole for operating the isolating switching are arranged on the panel; the gear slot is sequentially provided with four gears of interlocking, earthing, isolating and vacuum from top to bottom. By sliding the lever between different gears, the switching operations of the corresponding gears are unlocked; The spacing between the grounding interlock hole and the isolation interlock hole is smaller than the spacing between the grounding operation hole and the isolation operation hole; when the positions of the grounding interlock hole and the grounding operation hole correspond, the grounding separation and closing mechanism is unlocked for grounding separation and closing operation; when the positions of the isolation interlock hole and the isolation operation hole correspond, the isolation separation and closing mechanism is unlocked for isolation separation and closing operation.

[0007] Furthermore, the closing interlock mechanism includes an interlock baffle rotatably arranged on a support plate, a circuit breaker opening and closing indicator plate connected to the circuit breaker opening and closing shaft, and a closing interlock plate connected to the circuit breaker closing shaft; the lower end of the interlock baffle is hinged to the support plate through a first tension spring, and the upper end is hinged to the circuit breaker opening and closing indicator plate through a second tension spring; the closing interlock plate is provided with a protrusion, which cooperates with the lower end of the interlock baffle to block and lock the circuit breaker closing operation; when the slide plate descends to a retreat platform lower than the lower end of the interlock baffle, it is pulled by the first tension spring, and the interlock baffle deflects clockwise to make room for the rotation of the closing interlock plate, thereby unlocking the circuit breaker closing operation.

[0008] Furthermore, a slope is provided at a corner of the retreat platform for guiding the lower end of the interlocking baffle to deflect the interlocking baffle.

[0009] Furthermore, an interlocking rod is provided on the circuit breaker opening and closing indicator panel for limiting the upward sliding of the slide plate after the circuit breaker is closed.

[0010] Furthermore, the grounding and closing mechanism includes a grounding transmission gear rotatably arranged on a support plate and a grounding and closing gear connected to a grounding and closing rotating shaft of the circuit breaker; the grounding transmission gear is meshingly connected with the grounding and closing gear; a grounding operation cavity for controlling its own rotation is arranged on the grounding transmission gear, and the grounding operation cavity corresponds to the position of the grounding operation hole; an operating key is inserted into the grounding operation cavity through the grounding operation hole to control the rotation of the grounding transmission gear, thereby driving the grounding and closing gear to rotate, thereby realizing the grounding and closing of the circuit breaker.

[0011] Furthermore, the isolation and separation mechanism includes an isolation transmission gear rotatably arranged on a support plate and an isolation and separation gear connected to the isolation and separation rotating shaft of the circuit breaker; the isolation transmission gear is meshingly connected with the isolation and separation gear; the isolation transmission gear is provided with an isolation operation cavity for controlling its own rotation, and the isolation operation cavity corresponds to the position of the isolation operation hole; the operation key is inserted into the isolation operation cavity through the isolation operation hole to control the rotation of the isolation transmission gear, thereby driving the isolation and separation gear to rotate, thereby realizing the isolation and separation of the circuit breaker.

[0012] Furthermore, the support plate is provided with an electromagnetic lock for limiting the upward and downward movement of the slide plate.

[0013] Further, the vertical sliding of the sliding plate is realized by the cooperation of a guiding groove and a guiding post between the supporting plate and the sliding plate.

[0014] Further, mounting posts are arranged on the supporting plate, and the panel is fixedly installed on the mounting posts through bolts.

[0015] A five-prevention interlocking method is implemented based on any one of the above five-prevention interlocking devices, including power-on operation and power-off operation. The specific operation steps are as follows: A Power-on operation steps: A1. Close the circuit breaker cabinet door; at this time, the unlocking of the cabinet door opening and closing, the closing and opening of the grounding switch, the closing and opening of the isolating switch, and the closing of the circuit breaker are all in the locked state; The shift lever is in the interlocking gear position. At this time, the vertical locking rod is disengaged from the fixed locking hole installed on the circuit breaker cabinet door, and the cabinet door is in the unlocked state; the grounding operation hole and the isolating operation hole are both blocked by the sliding plate and are in the locked state; the closing interlocking mechanism is blocked by the vertical side surface of the sliding plate and is in the locked state; A2. Switch to the grounding gear position; at this time, the closing and opening of the grounding switch are in the unlocked state, and the cabinet door, the closing and opening of the isolating switch, and the closing of the circuit breaker are all in the locked state; Slide the shift lever downward from the interlocking gear position to the grounding gear position. The vertical locking rod is inserted downward into the fixed locking hole to lock the cabinet door so that it cannot be opened; at the same time, the grounding interlocking hole slides down to the position of the grounding operation hole, and the operation key is inserted into the grounding operation hole and the grounding interlocking hole in sequence to the grounding closing and opening mechanism to unlock the closing and opening of the grounding switch; the isolating operation hole is blocked by the sliding plate and is in the locked state; the closing interlocking mechanism is blocked by the vertical side surface of the sliding plate and is in the locked state; A3. Open the grounding switch; insert the operation key into the grounding operation hole and drive the grounding closing and opening mechanism to open the grounding switch; A4. Switch to the isolating gear position; at this time, the closing and opening of the isolating switch are in the unlocked state, and the cabinet door, the closing and opening of the grounding switch, and the closing of the circuit breaker are all in the locked state; Slide the shift lever downward from the grounding gear position to the isolating gear position. The vertical locking rod continues to be inserted downward into the fixed locking hole to lock the cabinet door so that it cannot be opened; the isolating interlocking hole slides down to the position of the isolating operation hole, and the operation key is inserted into the isolating operation hole and the isolating interlocking hole in sequence to the isolating closing and opening mechanism to unlock the closing and opening of the isolating switch; the grounding interlocking hole is disengaged from the grounding operation hole, so that the grounding operation hole is blocked by the sliding plate and is in the locked state; the closing interlocking mechanism is blocked by the vertical side surface of the sliding plate and is in the locked state; A5. Close the isolating switch; insert the operation key into the isolating operation hole and drive the isolating closing and opening mechanism to close the isolating switch; A6. Switch to the vacuum gear position; at this time, the closing of the circuit breaker is in the unlocked state, and the cabinet door, the closing and opening of the grounding switch, and the closing and opening of the isolating switch are all in the locked state; Slide the lever down from the isolation position to the vacuum position. The vertical locking rod continues to insert downward into the fixed locking hole to lock the cabinet door, making it impossible to open the cabinet door. The grounding interlock hole and the isolation interlock hole are disengaged from the grounding operation hole and the isolation operation hole respectively, causing the grounding operation hole and the isolation operation hole to be blocked by the slide plate and in a locked state. The retractable platform at the top of the slide plate unlocks the closing interlock mechanism. A7. Close the vacuum circuit breaker: Rotate the circuit breaker closing knob. The circuit breaker closes, and the circuit breaker closing and opening indicator panel deflects counterclockwise. The interlock rod restricts the top left end of the slide plate to prevent it from sliding upward and prevent the slide plate from retracting to the isolation position. B Power outage operation steps: B1. Open the vacuum circuit breaker: Rotate the circuit breaker opening knob. The circuit breaker opens, and the circuit breaker closing and opening indicator panel deflects clockwise. The interlock rod releases the lock on the top left end of the slide plate, allowing the slide plate to slide upward. B2. Switch to the isolation position: At this time, the isolation closing and opening are in the unlocked state, and the cabinet door, the grounding closing and opening, and the circuit breaker closing are all in the locked state. Slide the lever up from the vacuum position to the isolation position. The vertical locking rod is still located in the fixed locking hole to lock the cabinet door, making it impossible to open the cabinet door. The isolation interlock hole slides up to the isolation operation hole position, allowing the operation key to be inserted into the isolation operation hole and the isolation interlock hole in sequence to the isolation closing and opening mechanism to unlock the isolation closing and opening. The grounding interlock hole is still disengaged from the grounding operation hole, causing the grounding operation hole to be blocked by the slide plate and in a locked state. The closing interlock mechanism is blocked by the vertical side of the slide plate and in a locked state. B3. Disconnect the isolating switch: Insert the operation key into the isolation operation hole and drive the isolation closing and opening mechanism to disconnect the isolating switch. B4. Switch to the grounding position: At this time, the grounding closing and opening are in the unlocked state, and the cabinet door, the isolation closing and opening, and the circuit breaker closing are all in the locked state. Slide the lever up from the isolation position to the grounding position. The vertical locking rod is still located in the fixed locking hole to lock the cabinet door, making it impossible to open the cabinet door. At the same time, the grounding interlock hole slides up to the grounding operation hole position, allowing the operation key to be inserted into the grounding operation hole and the grounding interlock hole in sequence to the grounding closing and opening mechanism to unlock the grounding closing and opening. The isolation operation hole is blocked by the slide plate and in a locked state. The closing interlock mechanism is blocked by the vertical side of the slide plate and in a locked state. B5. Close the grounding switch: Insert the operation key into the grounding operation hole and drive the grounding closing and opening mechanism to close the grounding switch. B6. Switch to the interlock position: At this time, the opening and closing of the cabinet door are unlocked, and the grounding closing and opening, the isolation closing and opening, and the circuit breaker closing are all in the locked state. Slide the shift lever upward from the grounding position to the interlock position. At this time, the vertical locking lever disengages from the fixed locking hole, and the cabinet door is in the unlocked state; the grounding operation hole and the isolation operation hole are both blocked by the slide plate and are in the locked state; the closing interlock mechanism is blocked by the vertical side of the slide plate and is in the locked state. B7. Open the circuit breaker cabinet door.

[0016] A circuit breaker is installed with any one of the above-mentioned five-prevention locking devices.

[0017] Compared with the prior art, the beneficial effects of the present invention are: The five-prevention locking device of the present invention adopts a sandwich structure with a slide plate slidably arranged between the panel and the support plate, and uses a yielding platform arranged on the slide plate to cooperate with the closing interlock mechanism to realize the unlocking of the circuit breaker closing; grounding interlock holes and isolation interlock holes are provided, which cooperate with the grounding operation hole and the isolation operation hole on the panel respectively, and combine with the grounding opening and closing mechanism and the isolation opening and closing mechanism to realize the unlocking and locking of the grounding switch and the disconnector; at the same time, each time the slide plate slides one gear, only one function is unlocked, realizing the unlocking and interlocking between functions, ensuring that no operation errors will occur and causing safety problems. At the same time, the overall structure is simple, the operation is convenient, the reliability is high, and the safety is high. The five-prevention locking method of the present invention uses the shift lever of the five-prevention locking device to sequentially move and shift between the interlock, grounding, isolation and vacuum four gears, and through the mutual cooperation between the slide plate mechanism, the closing interlock mechanism, the grounding opening and closing mechanism and the isolation opening and closing mechanism of the five-prevention locking device, realizes the unlocking and interlocking functions of each gear during the energization operation and the power-off operation of the circuit breaker, making the opening and closing operation of the circuit breaker simpler, more convenient and safer. The circuit breaker of the present invention uses the five-prevention locking device to realize the opening and closing operation of the circuit breaker, and has the advantages of simple structure, convenient operation, high reliability and high safety. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of a five-prevention locking device of the present invention.

[0019] Figure 2 It is a schematic diagram of the panel structure of a five-prevention locking device of the present invention.

[0020] Figure 3 It is a schematic diagram of the grounding gear state of a five-prevention locking device of the present invention.

[0021] Figure 4 It is a schematic diagram of the grounding opening and closing operation of a five-prevention locking device of the present invention.

[0022] Figure 5 It is a schematic diagram of the isolation gear state of a five-prevention locking device of the present invention.

[0023] Figure 6 Schematic diagram of the isolation opening and closing operation of a five-prevention interlocking device according to the present invention.

[0024] Figure 7 Schematic diagram of the vacuum gear state of a five-prevention interlocking device according to the present invention.

[0025] Figure 8 Schematic diagram of the opening and closing operation of the circuit breaker of a five-prevention interlocking device according to the present invention.

[0026] Figure 9 Schematic diagram of the installation structure of a circuit breaker according to the present invention.

[0027] Wherein: Support plate 1, panel 2, slide plate 3, closing interlocking mechanism 4, earthing opening and closing mechanism 5, isolation opening and closing mechanism 6, fixed lock hole 7, electromagnetic lock 8, protruding block 9; Guide groove 11, guide post 12, mounting post 13, gear position groove 21, earthing operation hole 22, isolation operation hole 23, lever 31, earthing interlocking hole 32, isolation interlocking hole 33, retraction platform 34, vertical locking rod 35, limiting plate 36, inclined plane 37, interlocking baffle 41, circuit breaker opening and closing indicator board 42, closing interlocking board 43, first tension spring 44, second tension spring 45, interlocking rod 46, earthing transmission gear 51, earthing opening and closing gear 52, earthing operation cavity 53, isolation transmission gear 61, isolation opening and closing gear 62, isolation operation cavity 63. Detailed implementation manners Embodiment 1

[0028] Referring to Figures 1 to 9 , a five-prevention interlocking device according to the present invention includes a panel 2 and a support plate 1 arranged in parallel, a slide plate 3 slidably arranged up and down between the panel 2 and the support plate 1, a closing interlocking mechanism 4 for circuit breaker closing, an earthing opening and closing mechanism 5 for earthing opening and closing, and an isolation opening and closing mechanism 6 for isolation opening and closing, which are sequentially rotatably arranged on the support plate 1; A gear position groove 21, an earthing operation hole 22 for operating earthing opening and closing, and an isolation operation hole 23 for operating isolation opening and closing are vertically arranged on the panel 2; the gear position groove 21 is sequentially provided with four gears of interlock, earthing, isolation and vacuum from top to bottom, and the opening and closing conditions of each gear are as follows: Interlock gear position: The cabinet door is unlocked for opening and closing, and the earthing opening and closing, isolation opening and closing, and circuit breaker closing are all locked. In this state, only the cabinet door can be safely opened and closed; Earthing gear position: The earthing opening and closing is unlocked, and the cabinet door, isolation opening and closing, and circuit breaker closing are all locked. In this state, only the opening and closing of the earthing switch can be operated; Isolation gear position: The isolation opening and closing is unlocked, and the cabinet door, earthing opening and closing, and circuit breaker closing are all locked. In this state, only the opening and closing of the disconnector can be operated; Vacuum gear: The circuit breaker closing is unlocked, and the cabinet door, earthing switch closing and opening, and isolating switch closing and opening are all locked. In this state, only the circuit breaker closing can be operated; The five-prevention interlocking function of each of the above gears is achieved through the mutual cooperation between the panel 2, the slide plate 3, and the closing interlocking mechanism 4, the earthing switch closing and opening mechanism 5, and the isolating switch closing and opening mechanism 6; Specifically, a lever 31 for controlling the up and down movement of the slide plate 3 is fixedly installed on the slide plate 3, and an earthing interlocking hole 32 and an isolating interlocking hole 33 are vertically arranged in sequence. A retreat platform 34 is arranged 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 up and down movement of the slide plate 3 is driven, so as to realize the unlocking operation of the closing and opening of the corresponding gear; The earthing interlocking hole 32 and the isolating interlocking hole 33 are respectively matched with the earthing operation hole 22 and the isolating operation hole 23 on the panel 2 to realize the unlocking of the earthing switch and the isolating switch. When the earthing interlocking hole 32 and the earthing operation hole 22 are in corresponding positions, the earthing switch closing and opening mechanism 5 is unlocked for earthing switch closing and opening operations; when the isolating interlocking hole 33 and the isolating operation hole 23 are in corresponding positions, the isolating switch closing and opening mechanism 6 is unlocked for isolating switch closing and opening operations. To ensure that the earthing operation hole 22 and the isolating operation hole 23 are not unlocked simultaneously, the distance between the earthing interlocking hole 32 and the isolating interlocking hole 33 is smaller than the distance between the earthing operation hole 22 and the isolating operation hole 23, so that only one group of holes can be in corresponding positions at the same time, and the other group of holes cannot be in corresponding positions; The operating principles of the grounding switching mechanism 5 and the isolating switching mechanism 6 are similar. Specifically, the grounding switching mechanism 5 includes a grounding driving gear 51 rotatably arranged on the support plate 1 and a grounding switching gear 52 connected to the grounding switching rotating shaft of the circuit breaker. The grounding driving gear 51 is meshed with the grounding switching gear 52. A grounding operation cavity 53 for operating the key to control the rotation of the gear itself is arranged on the grounding driving gear 51, and the grounding operation cavity 53 corresponds to the position of the grounding operation hole 22. The operation key is inserted into the grounding operation cavity 53 through the grounding operation hole 22 to control the rotation of the grounding driving gear 51, and then drive the grounding switching gear 52 to rotate, realizing the grounding switching of the circuit breaker. The isolating switching mechanism 6 includes an isolating driving gear 61 rotatably arranged on the support plate 1 and an isolating switching gear 62 connected to the isolating switching rotating shaft of the circuit breaker. The isolating driving gear 61 is meshed with the isolating switching gear 62. An isolating operation cavity 63 for controlling its own rotation is arranged on the isolating driving gear 61, and the isolating operation cavity 63 corresponds to the position of the isolating operation hole 23. The operation key is inserted into the isolating operation cavity 63 through the isolating operation hole 23 to control the rotation of the isolating driving gear 61, and then drive the isolating switching gear 62 to rotate, realizing the isolating switching of the circuit breaker. The grounding interlock hole 32 and the isolating interlock hole 33 are synchronously moved up and down by the slide plate 3, cooperating with the grounding operation hole 22 and the isolating operation hole 23 on the panel 2, so that only one of the operation holes can be exposed for the operation key to be inserted and operated at the same time, realizing the unlocking and interlocking of the grounding switch and the disconnector. Further, the grounding driving gear 51, the grounding switching gear 52, the isolating driving gear 61, and the isolating switching gear 62 are all half gears, which limit the torsional angle. At the same time, a protruding block 9 is arranged on the grounding driving gear 51 and the isolating driving gear 61, cooperating with the limiting plate 36 arranged on the slide plate 3, realizing the blocking of the movement of the slide plate 3 and realizing the interlocking function, that is, after rotating the grounding driving gear 51 or the isolating driving gear 61, the protruding block 9 changes its position to block the limiting plate 36 and the slide plate 3 from sliding, realizing the interlocking between functions; The retractable platform 34 is used to unlock the closing interlock mechanism 4 of the circuit breaker for closing operation of the circuit breaker. It moves by means of the sliding plate 3. When the retractable platform 34 moves to the position of the closing interlock mechanism 4, it creates an unlocking space, realizing the unlocking of the circuit breaker for closing. Specifically, the closing interlock mechanism 4 includes an interlock baffle 41 rotatably arranged on the support plate 1, a circuit breaker closing and opening indicating plate 42 connected to the closing and opening rotating shaft of the circuit breaker, and a closing interlock plate 43 connected to the closing rotating shaft of the circuit breaker; the lower end of the interlock baffle 41 is hinged to the support plate 1 through a first tension spring 44, and the upper end is hinged to the circuit breaker closing and opening indicating plate 42 through a second tension spring 45; the closing interlock plate 43 is provided with a protrusion, which is in blocking cooperation with the lower end of the interlock baffle 41 to lock the closing operation of the circuit breaker; when the sliding plate 3 descends until the retractable platform 34 is lower than the lower end of the interlock baffle 41, the interlock baffle 41 is pulled by the first tension spring 44 to deflect clockwise, creating a rotating space for the closing interlock plate 43, and the closing knob of the circuit breaker can rotate clockwise for closing, realizing the unlocking of the closing operation of the circuit breaker; a slope 37 for guiding the lower end of the interlock baffle 41 to enable the interlock baffle 41 to deflect smoothly is provided at the corner of the retractable platform 34; The vertical locking rod 35 cooperates with a 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 sliding plate 3 moves downward, the vertical locking rod 35 is inserted into the fixed locking hole 7, making the cabinet door unable to be opened. Conversely, when the vertical locking rod 35 disengages from the fixed locking hole 7, the cabinet door is unlocked; Furthermore, an electromagnetic lock 8 is provided on the support plate 1 to restrict the up and down movement of the sliding plate 3. During power-on operation, when the lever 31 drives the sliding plate 3 to move from the grounding position to the isolation position, the electromagnetic lock 8 closes and the lock core extends, preventing the sliding plate 3 from retracting to the grounding position, realizing operation interlock; during power-off operation, when the lever 31 drives the sliding plate 3 to move from the isolation position to the grounding position, the electromagnetic lock 8 needs to be opened first so that the sliding plate 3 can slide upward smoothly; The vertical sliding of the sliding plate 3 between the support plate 1 and the sliding plate 3 is realized through the cooperation of a guide groove 11 and a guide post 12 to ensure the smooth vertical sliding of the sliding plate 3 and at the same time limit the up and down sliding distance of the sliding plate 3; an installation post 13 is provided on the support plate 1, and the panel 2 is fixedly installed on the installation post 13 through bolts; The present invention adopts a sandwich structure in which a slide plate 3 is slidably arranged between a panel 2 and a support plate 1. By using a yield platform 34 arranged on the slide plate 3 to cooperate with a closing interlock mechanism 4, unlocking of the circuit breaker closing is achieved. A grounding interlock hole 32 and an isolating interlock hole 33 are arranged, which cooperate with a grounding operation hole 22 and an isolating operation hole 23 on the panel 2 respectively, and in combination with a grounding opening and closing mechanism 5 and an isolating opening and closing mechanism 6, unlocking and locking of the grounding switch and the isolating switch are achieved. At the same time, each time the slide plate 3 slides one gear position, only one function is unlocked, realizing unlocking and interlocking between various functions, ensuring that no operation errors occur and no safety problems are caused. The overall structure is simple, the operation is convenient, the reliability is high, and the safety is high. Embodiment 2

[0029] A five-prevention locking method related to the present invention is realized based on the five-prevention locking device of Embodiment 1, and includes two operation methods: power-on operation and power-off operation. The specific operation steps are as follows: A. Power-on operation steps: The shift lever 31 is sequentially shifted between interlock, grounding, isolation, and vacuum. A1. Close the circuit breaker cabinet door; at this time, the cabinet door opening and closing is unlocked, and the grounding opening and closing, isolating opening and closing, and circuit breaker closing are all in a locked state. The shift lever 31 is in the interlock gear position. At this time, the vertical locking rod 35 is disengaged from the fixed locking hole 7 installed on the circuit breaker cabinet door, and the cabinet door is in an unlocked state and can be freely opened and closed; the grounding operation hole 22 and the isolating operation hole 23 are both blocked by the slide plate 3 and are in a locked state; the closing interlock mechanism 4 is blocked by the vertical side surface of the slide plate 3 and is in a locked state. A2. Switch to the grounding gear position; at this time, the grounding opening and closing is unlocked, and the cabinet door, isolating opening and closing, and circuit breaker closing are all in a locked state. Slide the shift lever 31 downward from the interlock gear position to the grounding gear position. The vertical locking rod 35 is inserted downward into the fixed locking hole 7 to lock the cabinet door and prevent it from being opened; at the same time, the grounding interlock hole 32 of the slide plate 3 slides down to the position of the grounding operation hole 22, so that the operation key can be inserted into the grounding operation hole 22, the grounding interlock hole 32 in sequence to the grounding opening and closing mechanism 5, that is, the operation key can be inserted into the operation cavity 53 of the grounding drive gear 51 to unlock the grounding opening and closing, and rotate the operation key interface to realize the opening and closing of the grounding switch; the isolating operation hole 23 is still blocked by the slide plate 3 and is in a locked state; the lower end of the interlock baffle 41 of the closing interlock mechanism 4 is still blocked by the vertical side surface of the slide plate 3 and is in a locked state. A3. Disconnect the grounding switch; insert the operation key into the grounding operation hole 22 and drive the grounding opening and closing mechanism 5 to disconnect the grounding switch. The grounding drive 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 and backward. At this time, the shift lever 31 cannot slide upward and backward to the interlock gear position again. A4. Switch to the isolation gear position; at this time, the isolation switch is in the unlocked state, and the cabinet door, the earthing switch, and the circuit breaker closing are all in the locked state; Slide the lever 31 downward from the earthing gear position to the isolation gear position. The vertical locking rod 35 continues to insert downward into the fixed locking hole 7 to lock the cabinet door so that the cabinet door cannot be opened; the isolation interlock hole 33 slides down to the position of the isolation operation hole 23, and the operation key is inserted into the isolation operation hole 23 and the isolation interlock hole 33 in sequence to the isolation switching mechanism 6 to unlock the isolation switch; the earthing interlock hole 32 is disengaged from the earthing operation hole 22, so that the earthing operation hole 22 is blocked by the slide plate 3 and is in the locked state; the closing interlock mechanism 4 is blocked by the vertical side of the slide plate 3 and is in the locked state; In this embodiment, after performing A4 to switch to the isolation gear position, lock the solenoid valve 8 to prevent the slide plate 3 from sliding backward upward; A5. Close the disconnecting switch; insert the operation key into the isolation operation hole 23 and drive the isolation switching mechanism 6 to close the disconnecting switch. The isolation transmission gear 61 deflects accordingly, and its protruding block 9 changes its position to block the limit plate 36 and the slide plate 3 from sliding backward upward. At this time, the lever 31 cannot slide backward upward to the earthing gear position anymore; A6. Switch to the vacuum gear position; at this time, the circuit breaker closing is in the unlocked state, and the cabinet door, the earthing switch, and the isolation switch are all in the locked state; Slide the lever 31 downward from the isolation gear position to the vacuum gear position. The vertical locking rod 35 continues to insert downward into the fixed locking hole 7 to lock the cabinet door so that the cabinet door cannot be opened; the earthing interlock hole 32 and the isolation interlock hole 33 are disengaged from the earthing operation hole 22 and the isolation operation hole 23 respectively, so that the earthing operation hole 22 and the isolation operation hole 23 are blocked by the slide plate 3 and are in the locked state; the retracting platform 34 at the top of the slide plate 3 causes the closing interlock plate 43 to deflect clockwise under the pulling force of the first tension spring 44. In the rotation space of the closing interlock plate 43, the closing knob of the circuit breaker can be rotated clockwise to close the circuit breaker, realizing the unlocking of the circuit breaker closing operation; A7. Close the vacuum circuit breaker; rotate the circuit breaker closing knob, and the circuit breaker closes. The circuit breaker opening and closing indicator board 42 deflects counterclockwise due to the closing of the circuit breaker. The second tension spring 45 is subjected to an increased pulling force, so as to pull the interlock baffle 41 to deflect counterclockwise and block the closing interlock plate 43 again to restore the locked state of the circuit breaker closing; at the same time, the counterclockwise deflection of the circuit breaker opening and closing indicator board 42 causes the interlock rod 46 to block the top left end of the slide plate 3 to prevent the slide plate 3 from sliding upward and prevent the slide plate 3 from retracting to the isolation gear position. That is, after the circuit breaker is closed, except for the circuit breaker opening operation, other operation switches cannot be operated, realizing the function of interlocking; B Power-off operation steps: The lever 31 is sequentially toggled between vacuum, isolation, earthing, and interlock; B1. Isolate the vacuum circuit breaker; Rotate the circuit breaker opening knob, and the circuit breaker opens. The circuit breaker closing and opening indicator board 42 deflects clockwise due to the internal opening of the circuit breaker, resulting in a decrease in the tension of the second tension spring 45. At this time, the closing interlock plate 43 deflects clockwise under the action of the tension of the first tension spring 44, and the circuit breaker closing is in the unlocked state; At the same time, the clockwise deflection of the circuit breaker closing and opening indicator board 42 releases the locking of the left top of the slide plate 3 by the interlock rod 46, allowing the slide plate 3 to slide upward; B2. Switch to the isolation gear; At this time, the isolation closing and opening is in the unlocked state, and the cabinet door, the earthing closing and opening, and the circuit breaker closing are all in the locked state; Slide the shift lever 31 upward from the vacuum gear to the isolation gear. The vertical locking rod 35 is still located in the fixed locking hole 7, locking the cabinet door and preventing it from being opened; The isolation interlock hole 33 slides upward to the isolation operation hole 23 position, allowing the operation key to be inserted into the isolation operation hole 23, the isolation interlock hole 33 in sequence to the isolation closing and opening mechanism 6, unlocking the isolation closing and opening; The earthing interlock hole 32 is still disengaged from the earthing operation hole 22, and the earthing operation hole 22 is blocked by the slide plate 3 and is in the locked state; The closing interlock mechanism 4 is blocked by the vertical side of the slide plate 3 and is in the locked state; B3. Disconnect the isolating switch; Insert the operation key into the isolation operation hole 23 and drive the isolation closing and opening mechanism 6 to close the isolating switch. The isolation transmission gear 61 deflects accordingly, and its projection 9 changes position to block the limit plate 36 and the slide plate 3 from sliding backward downward. At this time, the shift lever 31 cannot slide backward downward to the vacuum gear; In this embodiment, after performing B3 to disconnect the isolating switch, unlock the solenoid valve 8 to enable the slide plate 3 to continue sliding upward; B4. Switch to the earthing gear; At this time, the earthing closing and opening is in the unlocked state, and the cabinet door, the isolation closing and opening, and the circuit breaker closing are all in the locked state; Slide the shift lever 31 upward from the isolation gear to the earthing gear. The vertical locking rod 35 is still located in the fixed locking hole 7, locking the cabinet door and preventing it from being opened; At the same time, the earthing interlock hole 32 slides upward to the earthing operation hole 22 position, allowing the operation key to be inserted into the earthing operation hole 22, the earthing interlock hole 32 in sequence to the earthing closing and opening mechanism 5, unlocking the earthing closing and opening; The isolation operation hole 23 is blocked by the slide plate 3 and is in the locked state; The closing interlock mechanism 4 is blocked by the vertical side of the slide plate 3 and is in the locked state; B5. Close the earthing switch; Insert the operation key into the earthing operation hole 22 and drive the earthing closing and opening mechanism 5 to close the earthing switch. The earthing transmission gear 51 deflects accordingly, and its projection 9 changes position to block the limit plate 36 and the slide plate 3 from sliding backward downward. At this time, the shift lever 31 cannot slide backward downward to the isolation gear; B6. Switch to the interlock gear; At this time, the opening and closing of the cabinet door is unlocked, and the earthing closing and opening, the isolation closing and opening, and the circuit breaker closing are all in the locked state; Slide the shift lever 31 upward from the grounding position to the interlocking position. At this time, the vertical locking lever 35 disengages from the fixed locking hole 7, and the cabinet door is in the unlocked state, allowing the cabinet door to be safely opened and closed; the grounding operation hole 22 and the isolation operation hole 23 are both blocked by the slide plate 3 and are in the locked state; the closing interlocking mechanism 4 is blocked by the vertical side of the slide plate 3 and is in the locked state; B7. Open the circuit breaker cabinet door.

[0030] The five-prevention interlocking method of the present invention, through the cooperation of the slide plate, the closing interlocking mechanism 4, the grounding switching mechanism 5, the isolation switching mechanism 6 and other mechanisms in the five-prevention interlocking device of Embodiment 1, cleverly sets corresponding and cooperating yielding platforms 34, grounding interlocking holes 32, and isolation interlocking holes 33 on the slide plate 3, realizing the unlocking and interlocking of each operation step, making the energization and power-off operations of the circuit breaker simpler and more convenient, significantly improving the safety of the circuit breaker operation, and having a good prospect of popularization and application in the industry. Embodiment 3

[0031] See Figure 9 (The panel 2 is not shown in the figure). A circuit breaker according to the present invention is installed with the five-prevention interlocking device of Embodiment 1, and has the technical characteristics of simple structure, convenient operation, high reliability, and high safety.

[0032] In addition: It should be noted that the above specific implementation manner is only an optimized solution of this patent. Any modification or improvement made by those skilled in the art according to the above conceptions is within the protection scope of this patent.

Claims

1. A five-protection locking device, characterized in that: It comprises a panel (2) and a support plate (1) arranged vertically in parallel, a slide plate (3) arranged to slide up and down between the panel (2) and the support plate (1), a closing interlock mechanism (4) for closing the circuit breaker and arranged to rotate on the support plate (1) in sequence, 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 provided with a lever (31) for controlling the slide plate (3) to move up and down, and is provided with a grounding interlock hole (32) and an isolation interlock hole (33) in sequence in a vertical direction. A retreat platform (34) is provided at the top of the right end of the slide plate (3), and a vertical locking rod (35) is connected to the bottom of the slide plate; the retreat 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 a 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 gear slot (21) for slidingly embedding the lever (31), a grounding operation hole (22) for operating the grounding opening and closing switch, and an isolation operation hole (23) for operating the isolation opening and closing switch; the gear slot (21) is provided with four gears of interlocking, grounding, isolation and vacuum from top to bottom, and the lever (31) is used to slide between different gears to unlock the opening and closing operation of the corresponding gear; The distance between the grounding interlocking hole (32) and the isolation interlocking hole (33) is smaller than the distance between the grounding operation hole (22) and the isolation operation hole (23); When the positions of the grounding interlock hole (32) and the grounding operation hole (22) correspond, the grounding opening and closing mechanism (5) is unlocked for grounding opening and closing operations; when the positions of the isolation interlock hole (33) and the isolation operation hole (23) correspond, the isolation opening and closing mechanism (6) is unlocked for isolation opening and closing operations.

2. The five-protection locking device according to claim 1, characterized in that: The closing interlock mechanism (4) comprises an interlock baffle (41) rotatably arranged on a support plate (1), a circuit breaker opening and closing indicator plate (42) connected to a circuit breaker opening and closing rotating shaft, and a closing interlock plate (43) connected to the circuit breaker closing rotating 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 and closing indicator plate (42) via a second tension spring (45); the closing interlock plate (43) is provided with a protrusion, which cooperates with the lower end of the interlock baffle (41) to block and lock the closing operation of the circuit breaker; when the slide plate (3) descends to a retreat platform (34) below the lower end of the interlock baffle (41), the interlock baffle (41) is pulled by the first tension spring (44) to deflect clockwise, thereby giving up the rotation space of the closing interlock plate (43) and unlocking the closing operation of the circuit breaker.

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

4. The five-protection locking device according to claim 2, characterized in that: An interlocking rod (46) is provided on the circuit breaker opening / closing indicator plate (42) for limiting the upward sliding of the slide plate (3) after the circuit breaker is closed.

5. The five-protection locking device according to claim 1, characterized in that: The grounding separation and combination mechanism (5) comprises a grounding transmission gear (51) rotatably arranged on the support plate (1), and a grounding separation and combination gear (52) connected to the grounding separation and combination rotating shaft of the circuit breaker; the grounding transmission gear (51) is meshingly connected with the grounding separation and combination gear (52); a grounding operation cavity (53) for controlling the rotation of the grounding transmission gear (51) is arranged on the grounding transmission gear (51), and the grounding operation cavity (53) corresponds to the position of the grounding operation hole (22); An operating key is inserted into the grounding operating cavity (53) through the grounding operating hole (22), thereby controlling the grounding transmission gear (51) to rotate, thereby driving the grounding opening and closing gear (52) to rotate, thereby achieving grounding opening and closing of the circuit breaker.

6. The five-protection locking device according to claim 1, characterized in that: The isolating and switching mechanism (6) comprises an isolating transmission gear (61) rotatably arranged on a support plate (1), and an isolating and switching gear (62) connected to an isolating and switching rotating shaft of a circuit breaker; the isolating transmission gear (61) is meshingly connected with the isolating and switching gear (62); an isolating operating cavity (63) for controlling its own rotation is arranged on the isolating transmission gear (61), and the position of the isolating operating cavity (63) corresponds to the isolating operating hole (23); an operating key is inserted into the isolating operating cavity (63) through the isolating operating hole (23), so as to control the rotation of the isolating transmission gear (61), thereby driving the rotation of the isolating and switching gear (62), thereby realizing the isolating and switching of the circuit breaker.

7. The five-protection locking device according to claim 1, characterized in that: The support plate (1) is provided with an electromagnetic lock (8) for limiting the upward and downward movement of the slide plate (3).

8. The five-protection locking device according to claim 1, characterized in that: The support plate (1) and the slide plate (3) cooperate with each other through the guide groove (11) and the guide column (12) to realize the vertical sliding of the slide plate (3).

9. The five-protection locking device according to claim 1, characterized in that: A mounting column (13) is provided on the support plate (1), and the panel (2) is fixed on the mounting column (13) by means of bolts.

10. A five-protection locking method, characterized in that: It is realized based on any one of the five-protection locking devices in claims 1 to 8, including power-on operation and power-off operation, and the specific operation steps are: A Power-on operation steps: A1. Close the circuit breaker cabinet door. At this time, the cabinet door is unlocked, and the grounding switch, isolation switch, and circuit breaker switch are all in a locked state. The lever (31) is in the interlocking position, at which time the vertical locking rod (35) is disengaged from the fixed locking hole (7) installed on the circuit breaker cabinet door, and the cabinet door is in an unlocked state; the grounding operation hole (22) and the isolation operation hole (23) are both blocked by the slide plate (3) and are in a locked state; the closing interlocking mechanism (4) is blocked by the vertical side of the slide plate (3) and is in a locked state; A2. Switch to the grounding position; at this time, the grounding switch is unlocked, and the cabinet door, isolation switch, and circuit breaker are all locked; The lever (31) is slid downward from the interlocking position to the grounding position, and the vertical locking rod (35) is inserted downward into the fixed lock hole (7), so that the cabinet door is locked and cannot be opened; at the same time, the grounding interlocking hole (32) slides down to the position of the grounding operation hole (22), and the operating key is inserted into the grounding operation hole (22), the grounding interlocking hole (32) and the grounding separation and closing mechanism (5) in sequence, so that the grounding separation and closing switch is unlocked; the isolation operation hole (23) is blocked by the slide plate (3) and is in a locked state; the closing interlocking mechanism (4) is blocked by the vertical side of the slide plate (3) and is in a locked state; A3, opening and closing the grounding switch; inserting the operating key into the grounding operating hole (22), and driving the grounding opening and closing mechanism (5) to open and close the grounding switch; A4, switch to isolation position; At this time, the isolating switch is in unlocked state, and the cabinet door, grounding switch, and circuit breaker are all in locked state; The lever (31) is slid downward from the grounding position to the isolation position, and the vertical lock rod (35) is further inserted downward into the fixed lock hole (7), so that the cabinet door is locked and cannot be opened; the isolation interlock hole (33) slides down to the isolation operation hole (23), and the operation key is inserted into the isolation operation hole (23), the isolation interlock hole (33) and the isolation separation and closing mechanism (6) in sequence, so that the isolation separation and closing switch is unlocked; the grounding interlock hole (32) is separated from the grounding operation hole (22), so that the grounding operation hole (22) is blocked by the slide plate (3) and is in a locked state; the closing interlock mechanism (4) is blocked by the vertical side of the slide plate (3) and is in a locked state; A5. Close the isolating switch; insert the operating key into the isolating operating hole (23) and drive the isolating opening and closing mechanism (6) to close the isolating switch; A6, switch to vacuum position; At this time, the circuit breaker is in unlocked state, and the cabinet door, grounding switch, and isolation switch are all in locked state; The lever (31) is slid downward from the isolation position to the vacuum position, and the vertical lock rod (35) is further inserted downward into the fixed lock hole (7), so that the cabinet door is locked and cannot be opened; the grounding interlock hole (32) and the isolation interlock hole (33) are respectively separated from the grounding operation hole (22) and the isolation operation hole (23), so that the grounding operation hole (22) and the isolation operation hole (23) are blocked by the slide plate (3) and are in a locked state; the retreat platform (34) on the top of the slide plate (3) unlocks the closing interlock mechanism (4); A7. Close the vacuum circuit breaker; rotate the circuit breaker closing knob to close the circuit breaker, the circuit breaker opening and closing indicator plate (42) deflects counterclockwise, and the interlocking rod (46) limits the top of the left end of the slide plate (3), preventing it from sliding upward, and preventing the slide plate (3) from returning to the isolation position; B Power outage operation steps: B1. Disconnect the vacuum circuit breaker; rotate the circuit breaker opening knob to open the circuit breaker, the circuit breaker opening and closing indicator plate (42) deflects clockwise, and the interlocking rod (46) releases the lock on the top of the left end of the slide plate (3), allowing the slide plate (3) to slide upward; B2, switch to isolation position; At this time, the isolating switch is in unlocked state, and the cabinet door, grounding switch, and circuit breaker are all in locked state; The lever (31) is slid upward from the vacuum position to the isolation position, and the vertical lock rod (35) is still located in the fixed lock hole (7), so that the cabinet door is locked and cannot be opened; the isolation interlock hole (33) is slid upward to the isolation operation hole (23), and the operation key is inserted into the isolation operation hole (23), the isolation interlock hole (33) and the isolation separation and closing mechanism (6) in sequence, so that the isolation separation and closing switch is unlocked; the grounding interlock hole (32) is still separated from the grounding operation hole (22), so that the grounding operation hole (22) is blocked by the slide plate (3) and is in a locked state; the closing interlock mechanism (4) is blocked by the vertical side of the slide plate (3) and is in a locked state; B3, opening the isolating switch; inserting the operating key into the isolating operating hole (23), and driving the isolating opening and closing mechanism (6) to close the isolating switch; B4, switch to ground position; At this time, the grounding switch is in unlocked state, and the cabinet door, isolation switch, and circuit breaker are all in locked state; The lever (31) is slid upward from the isolation position to the grounding position, and the vertical locking rod (35) is still located in the fixed lock hole (7), so that the cabinet door is locked and cannot be opened; at the same time, the grounding interlock hole (32) is slid upward to the position of the grounding operation hole (22), and the operating key is inserted into the grounding operation hole (22), the grounding interlock hole (32) and the grounding separation and closing mechanism (5) in sequence, so that the grounding separation and closing switch is unlocked; the isolation operation hole (23) is blocked by the slide plate (3) and is in a locked state; the closing interlock mechanism (4) is blocked by the vertical side of the slide plate (3) and is in a locked state; B5. Close the grounding switch; insert the operating key into the grounding operating hole (22) and drive the grounding separation and closing mechanism (5) to close the grounding switch; B6, switch to the interlocking position; at this time, the cabinet door is unlocked, and the grounding switch, isolation switch, and circuit breaker switch are all in the locked state; The lever (31) is slid upward from the grounding position to the interlocking position, at which time the vertical locking rod (35) is disengaged from the fixed locking hole (7), and the cabinet door is in an unlocked state; the grounding operation hole (22) and the isolation operation hole (23) are both blocked by the slide plate (3) and are in a locked state; the closing interlocking mechanism (4) is blocked by the vertical side of the slide plate (3) and is in a locked state; B7. Open the circuit breaker cabinet door.

11. A circuit breaker, characterized in that: A five-proof locking device according to any one of claims 1 to 9 is installed.

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