Mechanical interlocking device for environment-friendly cabinet

Abstract

The invention belongs to the technical field of power distribution devices, and particularly relates to a mechanical interlocking device for an environment-friendly cabinet. A circuit breaker main shaft connected with a circuit breaker is arranged, a large shaft rotating plate is installed on the circuit breaker main shaft, a connecting plate is hinged to the large shaft rotating plate, and a first connecting rod is hinged to the connecting plate; a guide frame sliding relative to the first connecting rod is arranged on the first connecting rod; the first connecting rod is connected with a second connecting rod which is connected with a first limiting plate, and the first limiting plate is connected with a second limiting plate; a positioning rod is arranged on the second limiting plate, and the middle of the positioning rod is sleeved with a pressure spring. When the switch equipment is in a closed state, the operation hole in the three-station mechanism panel is shielded by the baffle plate, and the operation handle cannot be inserted, so that the three-station operation mechanism cannot be operated; when the switch equipment is in an opening state, the three-position switch can be operated; in the operation process of the three-position switch, the switch equipment cannot be switched on; the interlocking device is simple in structure, can accurately perform opening and closing operation and isolation operation, and meets the requirements of equipment in actual operation.

Description

Technical Field

[0001] This invention belongs to the field of switch cabinet technology, and particularly relates to a mechanical interlocking device for an environmental protection cabinet. Background Technology

[0002] Environmentally friendly gas-insulated switchgear typically employs a three-position switch on top and a circuit breaker below. The three-position switch integrates the functions of a disconnector and a grounding switch. The three positions of the moving contact allow for mechanical interlocking of the closed, disconnected, and grounded states, but it cannot guarantee mechanical interlocking with the circuit breaker. Existing interlocking devices are structurally complex and prone to jamming during operation, affecting closing, opening, and closing operations and posing safety hazards. Furthermore, the existing interlocking device layout is not convenient for installation on environmentally friendly gas-insulated switchgear. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a simple, safe and reliable interlocking device that can accurately perform opening and closing operations and isolation operations to meet the needs of equipment in actual operation.

[0004] To solve the above-mentioned technical problems, the present invention provides a mechanical interlock device for an environmental protection cabinet, including a circuit breaker main shaft connected to a circuit breaker, a large shaft rotating plate mounted on the circuit breaker main shaft, the large shaft rotating plate being fixedly connected to the circuit breaker main shaft, a connecting plate hinged to the large shaft rotating plate, one end of the connecting plate being hinged to the large shaft rotating plate, and the other end of the connecting plate being hinged to a first connecting rod; the first connecting rod is provided with a guide frame that slides relative to its length direction; the first connecting rod is provided with a second connecting rod connected to it, the second connecting rod being connected to a first limiting plate, the first limiting plate being connected to a second limiting plate; the second limiting plate is provided with a positioning rod, one end of the positioning rod passing through the second limiting plate and being fixedly connected to it, a compression spring being fitted in the middle of the positioning rod, and the other end of the positioning rod being inserted into a positioning bracket. The positioning bracket is connected to the circuit breaker operating mechanism in the positioning hole; the second limiting plate is also provided with a guide pin, which passes through the three-position mechanism panel, the second limiting plate and the first limiting plate; the second limiting plate is also provided with a limiting rod connected thereto, the limiting rod is connected to a limiting bracket, the limiting rod passes through the opening of the limiting bracket, and the limiting bracket is fixedly installed on the circuit breaker operating mechanism; the first limiting plate is provided with a groove, an elongated groove and an operating hole, the groove and the elongated groove are in communication; the three-position mechanism lever is fixedly connected to the baffle, the three-position mechanism lever passes through the groove and the elongated groove and is fixed to the baffle; the baffle is provided with an isolation operating hole and a grounding operating hole; the three-position mechanism panel is provided with an operating hole and a guide hole, the operating hole can be blocked by the baffle.

[0005] Furthermore, the first connecting rod has a square shape and passes through the guide frame. The guide frame is provided with a square hole that can cooperate with the first connecting rod, ensuring that the first connecting rod can only move up and down and cannot rotate.

[0006] Furthermore, the second limiting plate and the first limiting plate are respectively provided with guide grooves and guide slots, and the second limiting plate and the first limiting plate can move up and down relative to the three-station mechanism panel under the limitation of the guide pin.

[0007] Furthermore, a pressure plate is provided on the second limiting plate, and the pressure plate is connected to the positioning rod.

[0008] With the above structure and this interlocking device, when the switchgear is in the closed state, the operating hole of the three-position mechanism on the three-position mechanism panel is blocked by the baffle connected to the lever, and the operating handle cannot be inserted, thus preventing the operation of the three-position operating mechanism; when the switchgear is in the open state, the three-position switch can be operated; during the operation of the three-position switch, the switchgear cannot be closed; the interlocking device has a simple structure and can accurately perform opening and closing operations and isolation operations, meeting the needs of the equipment in actual operation. Attached Figure Description

[0009] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Figure 1 This is a schematic diagram of the internal structure of the interlocking device in this invention; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the structure of the first limiting plate in this invention; Figure 4 This is a schematic diagram showing the connection between the second limiting plate and the positioning rod in this invention; Figure 5 This is a schematic diagram showing the connection between the lever and the baffle in the three-station mechanism of this invention; In the diagram: 1-Circuit breaker main shaft, 2-Main shaft rotating plate, 3-Connecting plate, 4-First connecting rod, 5-Guide frame, 6-Second connecting rod, 7-First limit plate, 8-Three-position mechanism panel, 9-Guide pin, 10-Three-position mechanism lever, 11-Baffle, 12-Second limit plate, 13-Compression spring, 14-Positioning rod, 15-Positioning bracket, 16-Limit rod, 17-Limit bracket, 18-Closing button, 19-Three-position operating mechanism, 20-Circuit breaker operating mechanism, 21-Gas box. Detailed Implementation

[0010] See attached document Figure 1This invention provides a mechanical interlocking device for an environmental protection cabinet, comprising a circuit breaker main shaft 1 connected to a circuit breaker, a large shaft rotating plate 2 mounted on the circuit breaker main shaft 1, the large shaft rotating plate 2 being fixedly connected to the circuit breaker main shaft 1, a connecting plate 3 hinged to the large shaft rotating plate 2, one end of the connecting plate 3 being hinged to the large shaft rotating plate 2, and the other end of the connecting plate 3 being hinged to a first connecting rod 4; the first connecting rod 4 is provided with a guide frame 5 that slides relative to its length direction; the first connecting rod 4 has a square structure and passes through the guide frame 5, the guide frame 5 being provided with a square hole that can cooperate with the first connecting rod 4, ensuring that the first connecting rod 4 can only move up and down and cannot rotate. The first connecting rod 4 is provided with a second connecting rod 6 connected to it, the second connecting rod 6 being connected to a first limiting plate 7, and the first limiting plate 7 being connected to a second limiting plate 12.

[0011] Reference Figure 1 and Figure 2 The second limiting plate 12 is provided with a positioning rod 14. One end of the positioning rod 14 passes through the second limiting plate 12 and is fixedly connected to it. A compression spring 13 is fitted in the middle of the positioning rod 14. The other end of the positioning rod 14 is inserted into the positioning hole of the positioning bracket 15. The positioning bracket 15 is connected to the circuit breaker operating mechanism 20.

[0012] Reference Figure 1 and Figure 2 The second limiting plate 12 is also equipped with a guide pin 9, which passes through the three-station mechanism panel 8, the second limiting plate 12, and the first limiting plate 7, as shown in the reference. Figure 3 and Figure 4 The second limiting plate 12 and the first limiting plate 7 are respectively provided with guide groove 1201 and guide groove 701. The second limiting plate 12 and the first limiting plate 7 can move up and down relative to the three-station mechanism panel 8 under the limiting of guide pin 9.

[0013] like Figure 1 and Figure 4 As shown, the second limiting plate 12 is also provided with a limiting rod 16 connected thereto. The limiting rod 16 is connected to a limiting bracket 17. The limiting rod 16 passes through the opening of the limiting bracket 17. The limiting bracket 17 is fixedly installed on the circuit breaker operating mechanism 20.

[0014] like Figure 4 As shown, a pressure plate 1202 is provided on the second limiting plate 12. The pressure plate 1202 is connected to the positioning rod 14. The pressure plate 1202 needs to be pressed manually during operation.

[0015] like Figure 3 As shown, the first limiting plate 7 is provided with a groove 702, an elongated groove 703 and an operating hole 704, and the groove 702 and the elongated groove 703 are connected.

[0016] like Figure 5As shown, the three-position mechanism lever 10 is fixedly connected to the baffle 11. After passing through the groove 702 and the elongated groove 703, the three-position mechanism lever 10 is fixed to the baffle 11. When the three-position mechanism lever 10 is located inside the groove 702, the groove 702 restricts the left and right positions of the three-position mechanism lever 10. The baffle 11 is provided with an isolation operation hole 1101 and a grounding operation hole 1102.

[0017] like Figure 2 As shown, the three-position mechanism panel 8 is provided with an operation hole 801 and a guide hole 802. The operation hole 801 can be blocked by the baffle 11. The three-position operation mechanism 19 and the circuit breaker operation mechanism 20 are fixedly installed on the gas box 21.

[0018] The present invention, through the above structure, see [reference needed]. Figure 1 To explain, when the circuit breaker main shaft 1 rotates counterclockwise, the switchgear is in the closed state. At this time, the main shaft rotating plate 2 rotates counterclockwise, driving the first connecting rod 4 downward through the connecting plate 3. Consequently, the second connecting rod 6 and the first limiting plate 7, which are fixedly connected to it, move downward simultaneously. At this time, the groove 702 on the first limiting plate 7 locks the lever 10 of the three-position operating mechanism 19, preventing it from moving left or right. Simultaneously, the three-position mechanism operating hole 801 on the three-position mechanism panel 8 is blocked by the baffle 11 connected to the lever 10, preventing the operating handle from being inserted and thus preventing the operation of the three-position operating mechanism 19. At the same time, the second limiting plate 12, in its downward position, also blocks the three-position mechanism operating hole 801. This double restriction ensures that the three-position switch cannot be operated when the switchgear is in the closed state, meeting the electrical safety requirements and eliminating potential safety hazards.

[0019] When the switchgear is in the open position, the three-position switch can be operated. The process is as follows: Figure 1 As shown, the main shaft 1 of the circuit breaker rotates clockwise, and the switchgear is in the open state. At this time, the main shaft rotating plate 2 rotates clockwise, and drives the first connecting rod 4 to move upward through the connecting plate 3. Then, the second connecting rod 6 and the first limiting plate 7, which are fixedly connected to it, move upward synchronously. At this time, the groove 702 on the first limiting plate 7 separates from the lever 10 of the three-position operating mechanism 19. The elongated groove 703 on the first limiting plate 7 cooperates with the lever 10 of the three-position operating mechanism 19. The lever 10 can move left and right, driving the baffle 11 to move, so that the isolation operating hole 1101 or the grounding operating hole 1102 on the baffle 11 is concentric with the three-position mechanism operating hole 801 on the three-position mechanism panel 8. At this time, the three-position mechanism operating hole 801 is no longer blocked by the baffle 11. At the same time, when the first limiting plate 7 is in the upward position, the operating hole 704 on the first limiting plate 7 is also concentric with the three-station mechanism operating hole 801 on the three-station mechanism panel 8, and is no longer blocked. The operating handle can be inserted to perform the isolation or grounding operation of the three-station switch.

[0020] According to the five electrical safety requirements, the switching equipment must not be closed during the operation of a three-position switch. The process for achieving this requirement is as follows: Figure 1 As shown, when the switchgear is in the open state, the openings on the baffle 11 and the first limit plate 7 are concentric with the three-position mechanism operation hole 801 on the three-position mechanism panel 8, and no longer obstruct the three-position mechanism operation hole 801. At this time, the second limit plate 12 is located in an upper position under the support of the compression spring 13, obstructing the three-position mechanism operation hole 801. To operate the three-position mechanism, the pressure plate 1202 set on the second limit plate 12 needs to be pressed, causing the second limit plate 12 to move down, thus no longer obstructing the three-position mechanism operation hole 801. Because the handle is inserted into the operation hole, it limits the second limit plate 12. The limit rod 16, which is fixedly connected to the second limit plate 12, remains in a downward state. At this time, the limit rod 16 moves down and blocks the closing button 18, thus preventing the switchgear from closing, meeting the electrical five-proof requirements and eliminating safety hazards. When the three-position switch operation is completed, pull out the operating handle. Under the action of the compression spring 13, the second limit plate 12 drives the limit rod 16 to move upward, no longer blocking the closing button 18, and the closing operation can be performed.

[0021] This invention, through the above structure, involves a circuit breaker main shaft connected to the circuit breaker, on which a large shaft rotating plate is mounted and fixedly connected. A connecting plate is hinged to the large shaft rotating plate, with one end hinged to the rotating plate and the other end hinged to a first connecting rod. The first connecting rod has a guide frame that slides relative to its length direction. A second connecting rod is connected to the first connecting rod and is connected to a first limiting plate, which in turn connects to the second limiting plate. A positioning rod is provided on the second limiting plate, with one end penetrating and fixedly connected to it. A compression spring is fitted in the middle of the positioning rod, and the other end is inserted into a positioning hole in a positioning bracket. The first limiting plate is connected to the circuit breaker operating mechanism via a support bracket; the second limiting plate is also provided with a guide pin, which passes through the three-position mechanism panel, the second limiting plate, and the first limiting plate; the second limiting plate is also provided with a limiting rod connected thereto, which is connected to the limiting bracket and passes through the opening of the limiting bracket, which is fixedly installed on the circuit breaker operating mechanism; the first limiting plate is provided with a groove, an elongated groove, and an operating hole, with the groove and the elongated groove communicating with each other; the three-position mechanism lever is fixedly connected to the baffle, and after passing through the groove and the elongated groove, it is fixed to the baffle; the baffle is provided with an isolation operating hole and a grounding operating hole; the three-position mechanism panel is provided with an operating hole and a guide hole, and the operating hole can be blocked by the baffle. When the switchgear is in the closed state, the operating hole of the three-position mechanism on the three-position mechanism panel is blocked by the baffle connected to the lever, and the operating handle cannot be inserted, thus the three-position operating mechanism cannot be operated; when the switchgear is in the open state, the three-position switch can be operated; during the operation of the three-position switch, the switchgear cannot be closed; the interlocking device has a simple structure and can accurately perform opening and closing operations and isolation operations, meeting the needs of the equipment in actual operation.

[0022] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A mechanical interlock device for an environmental protection cabinet, comprising a circuit breaker spindle connected to a circuit breaker, characterized in that, A large shaft rotating plate is mounted on the main shaft of the circuit breaker, and the large shaft rotating plate is fixedly connected to the main shaft of the circuit breaker. A connecting plate is hinged to the large shaft rotating plate. One end of the connecting plate is hinged to the large shaft rotating plate, and the other end of the connecting plate is hinged to a first connecting rod. The first connecting rod is provided with a guide frame that slides relative to its length direction. A second connecting rod is provided on the first connecting rod and connected to it. The second connecting rod is connected to a first limiting plate, and the first limiting plate is connected to the second limiting plate. A positioning rod is provided on the second limiting plate. One end of the positioning rod passes through the second limiting plate and is fixedly connected to it. A compression spring is fitted in the middle of the positioning rod, and the other end of the positioning rod is inserted into the positioning hole of the positioning bracket. The positioning bracket is connected to the circuit breaker operating mechanism. The second limiting plate is also provided with a guide pin, which passes through the three-position mechanism panel, the second limiting plate, and the first limiting plate; the second limiting plate is also provided with a limiting rod connected thereto, the limiting rod is connected to a limiting bracket, the limiting rod passes through the opening of the limiting bracket, and the limiting bracket is fixedly installed on the circuit breaker operating mechanism; the first limiting plate is provided with a groove, an elongated groove, and an operating hole, the groove and the elongated groove being in communication; the three-position mechanism lever is fixedly connected to the baffle, the three-position mechanism lever passes through the groove and the elongated groove and is fixed to the baffle; the baffle is provided with an isolation operating hole and a grounding operating hole; the three-position mechanism panel is provided with an operating hole and a guide hole, the operating hole being able to be blocked by the baffle.

2. The mechanical interlock device for an environmental protection cabinet according to claim 1, characterized in that, The first connecting rod has a square shape and passes through the guide frame. The guide frame is provided with a square hole that can cooperate with the first connecting rod, ensuring that the first connecting rod can only move up and down and cannot rotate.

3. The mechanical interlock device for an environmental protection cabinet according to claim 1, characterized in that, The second limiting plate and the first limiting plate are respectively provided with guide groove and guide slot. The second limiting plate and the first limiting plate can move up and down relative to the three-station mechanism panel under the limitation of the guide pin.

4. The mechanical interlock device for an environmental protection cabinet according to claim 1, characterized in that, A pressure plate is provided on the second limiting plate, and the pressure plate is connected to the positioning rod.

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