Mechanical interlocking device of environment-friendly gas cabinet

Abstract

The utility model discloses a mechanical interlocking device of an environment-friendly gas cabinet, which belongs to the technical field of environment-friendly gas cabinets and comprises an upper mounting plate and a lower mounting plate, the upper mounting plate and the lower mounting plate are both mounted in an inner cavity of a cabinet body, and an isolation interlocking rod is arranged at the top end of the upper mounting plate. The surface of the upper mounting plate is provided with an isolation mechanism interlocking separation blade, an upper isolation interlocking grounding push plate, an isolation interlocking cam, an upper isolation interlocking isolation push plate and an electrifying structure used for electrifying, and the top end of the lower mounting plate is provided with an upper isolation interlocking circuit breaker push plate. The bottom end of the lower mounting plate is provided with a supporting structure used for abutting against the cabin door to assist in opening, so that the situation that the equipment still allows to separate the circuit breaker when the circuit breaker is mistakenly switched on, the circuit breaker is switched on and the cable cabin door is moved away is avoided, the operation risk is reduced, the five-prevention interlocking use effect is improved, the operation safety of the isolation environment-friendly gas cabinet is improved, and the service life of the isolation environment-friendly gas cabinet is prolonged. And misoperation and potential risks are avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of environmentally friendly gas cabinet equipment, specifically to a mechanical interlocking device for environmentally friendly gas cabinets. Background Technology

[0002] Five-proof interlocking is an important technical measure used in environmentally friendly gas cabinets to improve operational safety, mainly to prevent misoperation and ensure the safe operation of the equipment. The core purpose of the five-proof interlocking design is to ensure that the operation of the equipment complies with safety regulations under various conditions, thereby reducing the risk of human error and ensuring the stable operation of the power system.

[0003] Although existing isolated environmentally friendly gas cabinets possess certain safety protection measures, in practical applications, the current design fails to effectively prevent accidental circuit breaker reclosing when the grounding switch and isolation mechanism are open. This could lead to the equipment being energized in an unsafe state, causing equipment failure or safety accidents. Furthermore, the equipment is still allowed to disconnect the circuit breaker when the grounding switch is closed, the circuit breaker is closed, and the cable compartment door is removed. This increases operational risks, fails to fully consider the potential risks in these operations, and does not fully meet the requirements of the five-proof interlocking system. Consequently, the effectiveness of the five-proof interlocking system is reduced, lowering the operational safety of the isolated environmentally friendly gas cabinet and creating opportunities for misoperation and potential risks.

[0004] According to announcement number CN114823215A, a high-reliability interlocking device for a 10kV environmentally friendly gas-insulated switchgear and its usage method are provided. The device includes a vertically sliding interlocking plate in front of the disconnector operating mechanism, an isolation baffle hinged in front of the disconnector operating mechanism, and a grounding baffle hinged in front of the disconnector operating mechanism. One end of the isolation baffle is positioned in front of the isolation operating shaft, and one end of the grounding baffle is positioned in front of the grounding operating shaft. A vertical mechanical shaft is fixedly connected to the lower end of the interlocking plate. A mechanical shaft hole for inserting the mechanical shaft is opened at the upper end of the cable compartment door. The device also includes a door interlocking plate that slides back and forth at the bottom of the disconnector operating mechanism and a tension spring that pulls the door interlocking plate forward onto the lifting path of the mechanical shaft. A door interlocking push block adapted to the door interlocking plate is fixedly connected to the upper end of the cable compartment door. This invention fully meets the five electrical protection requirements, can be installed on environmentally friendly gas-insulated switchgear, and has high reliability, ensuring the safe and normal operation of the product.

[0005] According to the high-reliability interlocking device of the environmentally friendly gas-filled switchgear described above, the current design fails to effectively prevent accidental circuit breaker closing when the grounding switch and isolation mechanism are open. This could lead to the equipment being energized in an unsafe state, causing equipment failure or safety accidents. Furthermore, the equipment is still allowed to disconnect the circuit breaker when the grounding switch is closed, the circuit breaker is closed, and the cable compartment door is removed. This increases operational risks, fails to fully consider the potential risks in these operations, and does not fully meet the requirements of the five-proof interlocking system. This results in a decrease in the effectiveness of the five-proof interlocking system, reduces the operational safety of the isolated environmentally friendly gas-filled switchgear, and generates misoperation and potential risks. Therefore, we need to propose a mechanical interlocking device for the environmentally friendly gas-filled switchgear. Utility Model Content

[0006] The purpose of this utility model is to provide a mechanical interlocking device for an environmentally friendly gas cabinet. Through the design of the support structure, the bottom end of the support structure abuts against the hatch, preventing the hatch from opening. Simultaneously, the isolation interlocking rod moves downward, allowing the grounding switch to operate. Operating the grounding switch puts the isolation mechanism in the open state. At this time, the isolation mechanism's interlocking baffle rotates clockwise, allowing the isolation mechanism to operate. The grounding interlocking cam 13 rotates clockwise to abut against the grounding interlocking baffle, preventing the hatch from opening and preventing accidental entry into the energized compartment. This avoids accidental circuit breaker closing. Even when the circuit breaker is closed or the cable hatch door is removed, the equipment still allows the circuit breaker to disconnect, reducing operational risks, improving the effectiveness of the five-proof interlocking system, enhancing the operational safety of the isolated environmentally friendly gas cabinet, and avoiding misoperation and potential risks, thus solving the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a mechanical interlocking device for an environmentally friendly gas cabinet, comprising an upper mounting plate and a lower mounting plate, both of which are installed inside the cabinet. The top of the upper mounting plate is provided with an isolation interlocking rod. The surface of the upper mounting plate is respectively provided with an isolation mechanism interlocking baffle, an upper isolation interlocking grounding push plate, an isolation interlocking cam, an upper isolation interlocking isolation push plate, and an energizing structure for energizing. The top of the lower mounting plate is provided with an upper isolation interlocking circuit breaker push plate, and the bottom of the lower mounting plate is provided with a support structure for abutting the door to assist in tripping the circuit breaker.

[0008] Preferably, the energized structure includes a grounding interlock plate, a grounding interlock baffle is provided at the top of the grounding interlock plate, the grounding interlock baffle is installed on the surface of the upper mounting plate, and an upper isolation locking rod is provided at the bottom of the grounding interlock plate.

[0009] Preferably, a grounding interlock cam is mounted on the surface of the lower mounting plate, and the grounding interlock cam is disposed between the grounding interlock baffle and the isolation interlock rod.

[0010] Preferably, the support structure includes a circuit breaker interlocking rod, the top end of which is bolted to the bottom end of an isolation interlocking rod, and the bottom end of the isolation interlocking rod is bolted to a door interlocking rod. A first circuit breaker interlocking cam is provided on the upper surface of the lower mounting plate, and the surface of the first circuit breaker interlocking cam is connected to the circuit breaker interlocking rod.

[0011] Preferably, a second circuit breaker interlocking cam is also installed on the upper surface of the lower mounting plate, and the second circuit breaker interlocking cam is located directly below the upper isolation interlocking circuit breaker push plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This utility model provides a mechanical interlocking device for an environmentally friendly gas cabinet. Through the design of the support structure, the bottom end of the support structure abuts against the door, preventing the door from opening. Simultaneously, the isolation interlocking rod moves downward, allowing the grounding switch to operate. Operating the grounding switch puts the isolation mechanism in the open state. At this time, the isolation mechanism's interlocking baffle rotates clockwise, allowing the isolation mechanism to operate. The grounding interlocking cam 13 rotates clockwise to abut against the grounding interlocking baffle, preventing the door from opening and preventing accidental entry into the energized compartment. This avoids accidental circuit breaker closing. Even when the circuit breaker is closed or the cable compartment door is removed, the equipment still allows the circuit breaker to disconnect, reducing operational risks, improving the effectiveness of the five-proof interlocking system, enhancing the operational safety of the isolated environmentally friendly gas cabinet, and avoiding misoperation and potential risks.

[0014] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the upper isolating interlocking circuit breaker push plate and the second circuit breaker interlocking cam of this utility model.

[0017] In the diagram: 1. Isolation interlock rod; 2. Isolation mechanism interlock baffle; 3. Upper isolation interlock grounding push plate; 4. Isolation interlock cam; 5. Circuit breaker interlock rod; 6. First circuit breaker interlock cam; 7. Door interlock rod; 8. Upper isolation lock rod; 9. Upper isolation interlock circuit breaker push plate; 10. Upper isolation interlock isolation push plate; 11. Grounding interlock plate; 12. Grounding interlock baffle; 13. Grounding interlock cam; 14. Second circuit breaker interlock cam; 15. Connecting seat; 16. Moving wheel; 17. Push rod. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-2 This utility model provides a mechanical interlocking device for an environmentally friendly gas cabinet, including an upper mounting plate and a lower mounting plate, both of which are installed in the inner cavity of the cabinet. The top of the upper mounting plate is provided with an isolation interlocking rod 1, and the surface of the upper mounting plate is respectively provided with an isolation mechanism interlocking baffle 2, an upper isolation interlocking grounding push plate 3, an isolation interlocking cam 4, an upper isolation interlocking isolation push plate 10, and an energizing structure for energizing. The top of the lower mounting plate is provided with an upper isolation interlocking circuit breaker push plate 9, and the bottom of the lower mounting plate is provided with a support structure for abutting the door to assist in tripping the circuit breaker.

[0020] Rotate the support structure to move it downwards and block the hatch, preventing it from opening. Simultaneously, the isolation interlock rod 1 moves downwards, allowing the grounding switch to operate. Operate the grounding switch to put the isolation mechanism in the open state. At this time, the isolation mechanism interlock baffle 2 rotates clockwise, allowing the isolation mechanism to operate. The grounding interlock cam 13 rotates clockwise to block the grounding interlock baffle 12, preventing the hatch from opening and preventing accidental entry into the energized compartment. This avoids accidental circuit breaker closing. When the circuit breaker is closed or the cable hatch door is removed, the equipment still allows the circuit breaker to be disconnected, reducing operational risks, improving the effectiveness of the five-proof interlock, enhancing the operational safety of the isolated environmentally friendly gas cabinet, and avoiding misoperation and potential risks.

[0021] The energizing structure includes a grounding interlock plate 11, a grounding interlock baffle plate 12 is provided at the top of the grounding interlock plate 11, the grounding interlock baffle plate 12 is installed on the surface of the upper mounting plate, and an upper isolation locking rod 8 is provided at the bottom of the grounding interlock plate 11. Pulling down the grounding interlock plate 11 causes the upper isolation locking rod 8 to move down and abut against the hatch, and the grounding interlock baffle plate 12 rotates counterclockwise to realize the energizing operation.

[0022] A grounding interlock cam 13 is installed on the surface of the lower mounting plate. The grounding interlock cam 13 is located between the grounding interlock baffle 12 and the isolation interlock rod 1. The grounding interlock cam 13 rotates clockwise to abut the grounding interlock baffle 12, so that the hatch cannot be opened and to prevent accidental entry into the energized compartment.

[0023] The supporting structure includes a circuit breaker interlocking rod 5, the top of which is bolted to the bottom of an isolating interlocking rod 1. The bottom of the isolating interlocking rod 1 is bolted to a door interlocking rod 7. A first circuit breaker interlocking cam 6 is provided on the upper surface of the lower mounting plate. The surface of the first circuit breaker interlocking cam 6 is connected to the circuit breaker interlocking rod 5. When the circuit breaker is opened, the first circuit breaker interlocking cam 6 rotates counterclockwise, causing the circuit breaker interlocking rod 5 to move downward. The door interlocking rod 7 abuts against the door, preventing the door from being opened.

[0024] The upper surface of the lower mounting plate is also equipped with a second circuit breaker interlocking cam 14. The second circuit breaker interlocking cam 14 is located directly below the upper isolating interlocking circuit breaker push plate 9. When the upper isolating interlocking grounding push plate 3 is released and moved downward, it causes the upper isolating interlocking circuit breaker push plate 9 to move downward and block the second circuit breaker interlocking cam 14, preventing the circuit breaker from closing.

[0025] In actual use: the initial state is that the isolating switch is grounded and the circuit breaker is closed. At this time, the isolating mechanism interlocking plate 2 blocks the closing switch, the isolating interlocking rod 1 blocks the grounding switch and the isolating switch, the hatch interlocking rod 7 and the upper isolating locking rod 8 are at the upper end, the hatch can be removed, and the upper isolating locking rod 8 abuts against the circuit breaker tripping switch, so that the circuit breaker cannot trip.

[0026] When energized, pulling down the grounding interlock plate 11 causes the upper isolating lock rod 8 to move downwards and abut against the hatch door, while the grounding interlock plate 12 rotates counterclockwise. This trips the circuit breaker, causing the first circuit breaker interlock cam 6 to rotate counterclockwise, moving the circuit breaker interlock rod 5 downwards. The hatch door interlock rod 7 then abuts against the hatch door, preventing it from opening. Simultaneously, the isolating interlock rod 1 moves downwards, allowing the grounding switch to operate. Operating the grounding switch puts the isolating mechanism in the open state. At this time, the isolating mechanism interlock plate 2 rotates clockwise, allowing the isolating mechanism to operate. The grounding interlock cam 13 rotates clockwise and abuts against the grounding interlock plate 12, preventing the hatch door from opening and preventing accidental entry into the energized compartment. Simultaneously, the upper isolating interlock grounding push plate 3 is released and moved downwards, causing the upper isolating interlock circuit breaker push plate 9 to move downwards and abut against the second circuit breaker interlock cam 14, preventing the circuit breaker from closing. When the disconnecting switch is operated, the interlocking baffle 2 of the disconnecting mechanism rotates clockwise, blocking the grounding switch and preventing its operation. Simultaneously, the disconnecting interlocking cam 4 rotates clockwise, pushing the upper disconnecting interlocking grounding push plate 3 upwards, causing the upper disconnecting interlocking circuit breaker push plate 9 to move upwards and release the second circuit breaker interlocking cam 14, allowing the circuit breaker to close. When the circuit breaker closing button is operated, the switchgear is energized. At this time, the first circuit breaker interlocking cam 6 rotates clockwise, causing the circuit breaker interlocking rod 5 to move upwards, driving the disconnecting interlocking rod 1 upwards, blocking the disconnecting switch and preventing accidental operation of the disconnecting mechanism.

[0027] When using this device, multiple cabinets can be combined and installed in large electrical cabinets or large power distribution protective enclosures, and used in conjunction with other types of power distribution cabinets and electrical cabinets.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mechanical interlocking device for an environmentally friendly gas cabinet, comprising an upper mounting plate and a lower mounting plate, characterized in that: The upper and lower mounting plates are both installed in the inner cavity of the cabinet. The top of the upper mounting plate is provided with an isolation interlock rod (1). The surface of the upper mounting plate is provided with an isolation mechanism interlock baffle (2), an upper isolation interlock grounding push plate (3), an isolation interlock cam (4), an upper isolation interlock isolation push plate (10), and a power-on structure for powering on. The top of the lower mounting plate is provided with an upper isolation interlock circuit breaker push plate (9). The bottom of the lower mounting plate is provided with a support structure for abutting the hatch to assist in tripping the circuit breaker.

2. The mechanical interlock device for the environmentally friendly gas cabinet according to claim 1, characterized in that: The energized structure includes a grounding interlock plate (11), a grounding interlock baffle (12) is provided at the top of the grounding interlock plate (11), the grounding interlock baffle (12) is installed on the surface of the upper mounting plate, and an upper isolation locking rod (8) is provided at the bottom of the grounding interlock plate (11).

3. The mechanical interlock device for the environmentally friendly gas cabinet according to claim 2, characterized in that: The surface of the lower mounting plate is equipped with a grounding interlock cam (13), which is located between the grounding interlock baffle (12) and the isolation interlock rod (1).

4. The mechanical interlock device for the environmentally friendly gas cabinet according to claim 1, characterized in that: The supporting structure includes a circuit breaker interlocking rod (5), the top end of which is bolted to the bottom end of an isolation interlocking rod (1), and the bottom end of the isolation interlocking rod (1) is bolted to a door interlocking rod (7). The upper surface of the lower mounting plate is provided with a first circuit breaker interlocking cam (6), and the surface of the first circuit breaker interlocking cam (6) is connected to the circuit breaker interlocking rod (5).

5. The mechanical interlock device for the environmentally friendly gas cabinet according to claim 1, characterized in that: The upper surface of the lower mounting plate is also equipped with a second circuit breaker interlocking cam (14), which is located directly below the upper isolation interlocking circuit breaker push plate (9).

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