Safety electric lock structure of high-voltage power distribution grounding switch

Abstract

The utility model discloses a safety electrical lock structure of a high-voltage power distribution grounding switch, which comprises a power distribution cabinet, a circuit breaker and a grounding knife-switch, a circuit breaker closing loop is connected between the power distribution cabinet and the circuit breaker, and a grounding knife-switch opening and closing point and a grounding knife-switch cutting-off point are arranged in a circuit of the circuit breaker closing loop. A second mounting shell and a first mounting shell are respectively arranged at an opening and closing point and a cut-off point of the grounding knife-switch, a second cylinder and a first lapping plate are mounted in the first mounting shell, the first lapping plate is mounted at the end part of a piston rod of the second cylinder, a first cylinder is mounted in the second mounting shell, and the grounding knife-switch is mounted at the end part of a piston rod of the first cylinder; the second installation shell and the first installation shell are respectively provided with a cut-off control module and a switch-on module. Through the above structure, when the grounding knife switch is closed, the high-voltage power distribution cabinet closes the grounding knife switch under the condition of violating the operation rule, and the closing operation of the circuit breaker cannot be carried out, thereby achieving the purpose of preventing misoperation, and ensuring the safety and reliability of the operation.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage power distribution equipment, in particular to a safety electrical lock structure for a high-voltage power distribution grounding switch. Background Art

[0002] High-voltage distribution cabinets are crucial components of power systems, primarily used to receive, distribute, and control high-voltage electrical energy. They not only distribute electrical energy but also perform multiple functions, including protection, monitoring, and control. Within high-voltage distribution cabinets, the grounding switch plays a crucial role. A grounding switch is a switch device used to safely ground equipment, effectively preventing damage to personnel and equipment in the event of an electrical fault.

[0003] Currently, some high-voltage distribution cabinets used in mines generally only have mechanical locking functions, without electrical locking. During power outages, operators can misoperate (directly closing the switch while the grounding switch is in the closed position) to restore power, potentially leading to over-tripping accidents and impacting the normal operation of the mine power supply system. Therefore, the present invention provides a safety electrical lock structure for a high-voltage distribution grounding switch to address the aforementioned issues. Utility Model Content

[0004] The purpose of the utility model is to provide a high-voltage distribution grounding switch safety electrical lock structure. When the grounding knife switch is closed, the high-voltage distribution cabinet closes the grounding knife switch in violation of the operating rules, and the circuit breaker closing operation cannot be performed, thereby preventing misoperation and ensuring the safety and reliability of operation.

[0005] To achieve the above-mentioned purpose, a high-voltage power distribution grounding switch safety electrical lock structure is provided, comprising a power distribution cabinet, a circuit breaker and a grounding knife switch, wherein a circuit breaker closing circuit is connected between the power distribution cabinet and the circuit breaker, and an earthing knife switch opening and closing point and a cut-off point are provided in the circuit breaker closing circuit, and a second mounting shell and a first mounting shell are respectively provided at the earthing knife switch opening and closing point and the cut-off point, wherein a second cylinder and a first lap plate are installed in the first mounting shell, wherein the first lap plate is installed at the end of the second cylinder piston rod, wherein the first cylinder is installed in the second mounting shell, and the earthing knife switch is installed at the end of the first cylinder piston rod, wherein a cut-off control module and a closing module are respectively provided at the second mounting shell and the first mounting shell, wherein the second cylinder and the first cylinder are electrically connected to the cut-off control module and the closing module respectively;

[0006] An interlocking assembly is also provided inside the first mounting shell, and the interlocking assembly includes a mounting plate fixedly connected to the grounding switch and made of non-metallic material, an electromagnet fixedly connected to one side of the mounting plate, a detection module provided at the first mounting shell, a second sliding rod slidably connected to the inside of the first mounting shell and located on one side of the electromagnet, a movable plate fixedly connected to one end of the second sliding rod close to the electromagnet and made of metal material, a second strapping plate fixedly connected to the side of the movable plate close to the electromagnet, and a positive power supply and a negative power supply connected to the cut-off control module, the electromagnet is electrically connected to the detection module, the detection module is electrically connected to the three-phase high-voltage output line of the circuit breaker, and the ends of the positive power supply and the negative power supply opposite to the cut-off control module both extend to the side of the second strapping plate close to the electromagnet.

[0007] According to the described high-voltage distribution grounding gate safety electrical lock structure, the second slide bar is fixedly connected to an end plate on a side away from the movable plate, and a first spring is sleeved on the outer side of the second slide bar and on one side of the end plate.

[0008] According to the safety electrical lock structure of the high-voltage power distribution grounding switch, an indicator light is provided on the closing module, and the indicator light is electrically connected to the detection module.

[0009] According to the described safety electrical lock structure for a high-voltage power distribution grounding switch, two first sliding rods made of non-metallic material are symmetrically fixedly connected to the top of the grounding switch, the tops of the first sliding rods extend to the top of the first mounting shell and are fixedly connected to the top plate, and a second spring is sleeved on the outside of the first sliding rod and located below the top plate.

[0010] According to the safety electrical lock structure for a high-voltage power distribution grounding switch, the closing module is further provided with a button arranged near the indicator light.

[0011] According to the described high-voltage distribution grounding switch safety electrical lock structure, a 220V terminal block is provided inside the distribution cabinet, and the end of the circuit breaker closing circuit close to the distribution cabinet is connected to the 220V terminal block of the distribution cabinet.

[0012] The utility model has the following beneficial effects:

[0013] Compared with the existing technology, this high-voltage distribution grounding switch safety electrical lock structure, by setting a detection module, a first jumper plate, a closing module, a grounding knife switch opening and closing point, a cut-off control module and an interlocking component, can prevent the high-voltage distribution cabinet from performing the circuit breaker closing operation when the grounding knife switch is closed in violation of the operating rules, thereby achieving the purpose of preventing misoperation and ensuring the safety and reliability of operation.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0016] Figure 1 This is a schematic diagram of the overall structure of a safety electrical lock structure for a high-voltage power distribution grounding switch of the utility model;

[0017] Figure 2 This utility model is a high voltage distribution grounding switch safety electrical lock structure Figure 1 A in the middle is an enlarged structural diagram;

[0018] Figure 3 This utility model is a high voltage distribution grounding switch safety electrical lock structure Figure 1 Enlarged structural diagram at point B in the middle.

[0019] Legend:

[0020] 1. Power distribution cabinet; 2. Circuit breaker; 3. Circuit breaker closing circuit; 4. Grounding knife switch opening and closing points; 5. Grounding knife switch; 6. Cut-off point; 7. First cylinder; 8. Second cylinder; 9. First connecting plate; 10. First mounting shell; 11. Cut-off control module; 12. Closing module; 13. Push button; 14. Indicator light; 15. Detection module; 16. Second mounting shell; 17. Mounting plate; 18. Electromagnet; 19. Positive power supply; 20. Negative power supply; 21. Movable plate; 22. Second connecting plate; 23. End plate; 24. First spring; 25. Second slide bar; 26. Top plate; 27. First slide bar; 28. Second spring. DETAILED DESCRIPTION

[0021] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0022] Reference Figure 1-3The embodiment of the utility model provides a high-voltage power distribution grounding switch safety electrical lock structure, which includes a power distribution cabinet 1, a circuit breaker 2 and a grounding knife switch 5. The power distribution cabinet 1 and the circuit breaker 2 are connected to a circuit breaker closing circuit 3. The circuit breaker closing circuit 3 is provided with a grounding knife switch opening and closing point 4 and a cut-off point 6. The grounding knife switch opening and closing point 4 and the cut-off point 6 are respectively provided with a second mounting shell 16 and a first mounting shell 10. The first mounting shell 10 is provided with a second cylinder 8 and a first jumper plate 9. The first jumper plate 9 is installed at the end of the piston rod of the second cylinder 8. When the second cylinder 8 is working, the first jumper plate 9 will move accordingly. The second mounting shell 16 is provided with a first cylinder 7. The grounding knife switch 5 is installed at the end of the piston rod of the first cylinder 7 so that the opening and closing of the grounding knife switch 5 can be controlled by the first cylinder 7. The second mounting shell 16 and the first mounting shell 10 are respectively provided with a cutting control module 11 and a closing module 12 , and the second cylinder 8 and the first cylinder 7 are respectively electrically connected to the cutting control module 11 and the closing module 12 .

[0023] In order to realize electrical interlocking, an interlocking assembly is also provided inside the first mounting shell 10, which includes a mounting plate 17 fixedly connected to the grounding knife switch 5 and made of non-metallic material, an electromagnet 18 fixedly connected to one side of the mounting plate 17, a detection module 15 provided at the first mounting shell 10, a second slide bar 25 slidably connected to the inside of the first mounting shell 10 and located on one side of the electromagnet 18, a movable plate 21 fixedly connected to one end of the second slide bar 25 near the electromagnet 18 and made of metal material, and a movable plate 21 fixedly connected to one end of the movable plate 21 near the electromagnet 18. The second jumper plate 22 on the side and the positive power supply 19 and the negative power supply 20 connected to the cut-off control module 11, the electromagnet 18 is electrically connected to the detection module 15, and the detection module 15 is electrically connected to the three-phase high-voltage output line of the circuit breaker 2. The positive power supply 19 and the negative power supply 20 on the opposite end of the cut-off control module 11 extend to the side of the second jumper plate 22 close to the electromagnet 18, and the second slide rod 25 is fixedly connected to the end plate 23 on the side away from the movable plate 21. A first spring 24 is sleeved on the outside of the second slide rod 25 and on one side of the end plate 23.

[0024] The detection module 15 is used to monitor the energized state of the three-phase high-voltage outlet. When the three-phase high-voltage outlet of the circuit breaker 2 is not energized and is closed normally, the first jumper plate 9 is overlapped at the cut-off point 6. The operation of the first cylinder 7 is controlled by the closing module 12 so that the grounding knife 5 is overlapped at the grounding knife switch opening and closing point 4 for closing. At this time, the circuit breaker closing circuit 3 is connected to control the closing operation of the circuit breaker 2. When the three-phase high-voltage outlet is in a energized state, the detection module 15 receives a signal so that the electromagnet 18 is in an energized state. When the grounding knife 5 is closed in violation of the operating rules, the grounding knife 5 moves downward so that the electromagnet 18 moves to the side of the movable plate 21. The energized electromagnet 18 attracts the movable plate 21 to move. The moving movable plate 21 causes the second jumper plate 22 to overlap between the positive power supply 19 and the negative power supply 20, thereby triggering the cut-off control module 11. By cutting off the cooperation between the control module 11 and the second cylinder 8, the first lap plate 9 is separated from the cut-off point 6 to realize the cut-off operation of the circuit breaker closing circuit 3, so that when the grounding switch 5 of the high-voltage distribution cabinet is closed, the circuit breaker 2 cannot be closed, thereby preventing misoperation and ensuring the safety and reliability of operation.

[0025] The closing module 12 is provided with an indicator light 14, which is electrically connected to the detection module 15. When the high-voltage outgoing line is energized, the indicator light 14 will light up, indicating that the grounding switch 5 cannot be safely operated. The closing module 12 is also provided with a button 13 located near the indicator light 14 for manually controlling the opening and closing of the grounding switch 5.

[0026] In order to ensure the stability of the grounding switch 5 during operation, two first sliding rods 27 made of non-metallic material are symmetrically fixedly connected to the top of the grounding switch 5. The tops of the first sliding rods 27 extend to the top of the first mounting shell 10 and are fixedly connected to the top plate 26. A second spring 28 is sleeved on the outside of the first sliding rods 27 and located below the top plate 26 to provide additional support and stability for the grounding switch 5.

[0027] A 220V terminal block is provided inside the distribution cabinet 1. The end of the circuit breaker closing circuit 3 close to the distribution cabinet 1 is connected to the 220V terminal block of the distribution cabinet 1. An additional terminal block is installed at the grounding switch 5 of the high-voltage distribution cabinet. According to the correct operating rules, it is connected between the circuit breaker 2 and the 220V terminal for mutual locking.

[0028] Working principle: The detection module 15 is used to monitor the energized state of the three-phase high-voltage outlet. When the three-phase high-voltage outlet of the circuit breaker 2 is not energized and is closed normally, the first jumper plate 9 is overlapped at the cut-off point 6. The closing module 12 controls the operation of the first cylinder 7 so that the grounding knife 5 is overlapped at the grounding knife switch opening and closing point 4 for closing. At this time, the circuit breaker closing circuit 3 is connected to control the closing operation of the circuit breaker 2. When the three-phase high-voltage outlet is in a energized state, the detection module 15 receives a signal, so that the electromagnet 18 is in an energized state. When the grounding knife 5 is closed in violation of the operating rules, the grounding knife 5 moves downward, so that the electromagnet 18 moves to the side of the movable plate 21. The energized electromagnet 18 attracts the movable plate 21 to move. The moving movable plate 21 causes the second jumper plate 22 to overlap between the positive power supply 19 and the negative power supply 20, thereby triggering the cut-off control module 11. By cutting off the cooperation between the control module 11 and the second cylinder 8, the first lap plate 9 is separated from the cut-off point 6 to realize the cut-off operation of the circuit breaker closing circuit 3, so that when the grounding switch 5 of the high-voltage distribution cabinet is closed, the circuit breaker 2 cannot be closed, thereby preventing misoperation and ensuring the safety and reliability of operation.

[0029] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A high voltage distribution grounding switch safety electrical lock structure, characterized in that: The invention comprises a power distribution cabinet (1), a circuit breaker (2) and a grounding knife switch (5); a circuit breaker closing circuit (3) is connected between the power distribution cabinet (1) and the circuit breaker (2); a grounding knife switch opening and closing point (4) and a cut-off point (6) are provided in the circuit breaker closing circuit (3); a second mounting shell (16) and a first mounting shell (10) are provided at the grounding knife switch opening and closing point (4) and the cut-off point (6), respectively; a second cylinder (8) and a first lap plate (9) are installed in the first mounting shell (10). The first lap plate (9) is mounted on the end of the piston rod of the second cylinder (8), the first cylinder (7) is mounted in the second mounting shell (16), the grounding knife switch (5) is mounted on the end of the piston rod of the first cylinder (7), the second mounting shell (16) and the first mounting shell (10) are respectively provided with a cut-off control module (11) and a closing module (12), and the second cylinder (8) and the first cylinder (7) are respectively electrically connected to the cut-off control module (11) and the closing module (12); An interlocking assembly is further provided inside the first mounting shell (10), and the interlocking assembly comprises a mounting plate (17) fixedly connected to the grounding knife switch (5) and made of non-metallic material, an electromagnet (18) fixedly connected to one side of the mounting plate (17), a detection module (15) provided at the first mounting shell (10), a second slide bar (25) slidably connected to the inside of the first mounting shell (10) and located on one side of the electromagnet (18), and a movable plate (21) fixedly connected to one end of the second slide bar (25) close to the electromagnet (18) and made of metal material. ), a second connecting plate (22) fixedly connected to the movable plate (21) on the side close to the electromagnet (18), and a positive power supply (19) and a negative power supply (20) connected to the cut-off control module (11), the electromagnet (18) is electrically connected to the detection module (15), the detection module (15) is electrically connected to the three-phase high-voltage output line of the circuit breaker (2), and the ends of the positive power supply (19) and the negative power supply (20) opposite to the cut-off control module (11) are extended to the side of the second connecting plate (22) close to the electromagnet (18).

2. A high-voltage distribution grounding switch safety electrical lock structure according to claim 1, characterized in that: The side of the second slide bar (25) away from the movable plate (21) is fixedly connected to the end plate (23), and the outside of the second slide bar (25) and one side of the end plate (23) is sleeved with a first spring (24).

3. A high-voltage distribution grounding switch safety electrical lock structure according to claim 2, characterized in that: An indicator light (14) is provided on the closing module (12), and the indicator light (14) is electrically connected to the detection module (15).

4. A high-voltage distribution grounding switch safety electrical lock structure according to claim 3, characterized in that: Two first sliding rods (27) made of non-metallic material are symmetrically fixedly connected to the top of the grounding knife switch (5), the tops of the first sliding rods (27) are extended to the top of the first mounting shell (10) and are fixedly connected to the top plate (26), and second springs (28) are sleeved on the outside of the first sliding rods (27) and located below the top plate (26).

5. A high-voltage distribution grounding switch safety electrical lock structure according to claim 4, characterized in that: The closing module (12) is also provided with a button (13) arranged close to the indicator light (14).

6. A high-voltage distribution grounding switch safety electrical lock structure according to claim 1, characterized in that: A 220V terminal block is provided inside the power distribution cabinet (1), and one end of the circuit breaker closing circuit (3) close to the power distribution cabinet (1) is connected to the 220V terminal block of the power distribution cabinet (1).

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