A mechanical interlocking device for the cable compartment door of a gas-insulated switchgear and the grounding switch.

Abstract

This utility model discloses a mechanical locking device for a gas-insulated switchgear cable compartment door and a grounding switch, including a cable compartment and a mechanism frame. A cable compartment door is connected to the end of the cable compartment, and an emergency unlocking device is installed on the cable compartment door. A grounding switch tripping and mechanical locking device are installed on the mechanism frame. The grounding switch tripping includes a tripping half-shaft and a tripping crank arm. The tripping crank arm rests on the tripping half-shaft to achieve grounding. The mechanical locking device includes a locking rod and a locking baffle. The locking baffle is located on the tripping half-shaft. By opening the cable compartment door, the second compression spring is no longer compressed. Under the elastic force of the second compression spring, the sliding module drives the variable speed cable tube to move, further driving the limit plate to move to one side of the locking baffle to lock the tripping half-shaft, so that the tripping half-shaft and the tripping crank arm are always engaged together.

Description

Technical Field

[0001] This utility model relates to the technical field of interlocking devices for gas-filled cabinets, specifically a mechanical locking device for the cable compartment door and grounding switch of a gas-filled cabinet. Background Technology

[0002] Environmentally friendly gas control cabinets are devices that use environmentally friendly gases as the insulating medium, designed to reduce environmental impact and enhance safety. These cabinets are widely used in power systems, especially in applications requiring high insulation and low maintenance. The design and manufacture of environmentally friendly gas control cabinets adhere to stringent environmental standards, ensuring that they do not pose a threat to the environment or human health during operation.

[0003] For environmentally friendly gas cabinets, the lower door interlock is a crucial component of the five-prevention interlock system. The interlock is a safety mechanism used to control the opening and closing of the cabinet door, primarily preventing personnel from operating the door without disconnecting the power supply or stopping the equipment inside, thus avoiding dangerous accidents such as electric shock or explosion. During operation, the interlock device locks the cabinet door until all relevant operating steps are completed and confirmed, ensuring the safe operation of the equipment. Existing technologies include soft interlocks and hard interlocks. Soft interlocks consist of steel wire ropes, hoses, sliders, and locking rods, offering poor protection against misoperation and low stability. Hard interlock mechanisms are relatively complex. Therefore, this technical solution proposes a simple mechanical locking device for the cable compartment door and grounding switch of the gas-filled cabinet. Utility Model Content

[0004] The purpose of this utility model is to provide a mechanical locking device for the cable compartment door of a gas-insulated switchgear and the grounding switch. By opening the cable compartment door, the second compression spring is no longer in a compressed state. Under the elastic force of the second compression spring, the sliding module drives the speed-changing cable tube to move, and further drives the limit plate to move to one side of the locking baffle to lock the tripping half shaft, so that the tripping half shaft and the tripping crank arm are always connected together.

[0005] This utility model provides the following technical solution: a mechanical locking device for a gas-filled cabinet cable compartment door and a grounding switch, comprising a cable compartment and a mechanism frame, wherein a cable compartment door is connected to the end of the cable compartment, an emergency unlocking device is installed on the cable compartment door, and a grounding switch tripping and mechanical locking device is installed on the mechanism frame;

[0006] The grounding switch tripping includes a tripping half-shaft and a tripping crank arm. The tripping crank arm rests on the tripping half-shaft to achieve grounding. The mechanical locking device includes a locking rod and a locking baffle. The locking baffle is located on the tripping half-shaft. A connecting plate is formed at the end of the locking rod. A limit plate is formed on the connecting plate. The limit plate is located on one side of the locking baffle. A speed-changing conduit is connected to the lower end of the locking rod. The other end of the speed-changing conduit is connected to the limit device. The limit device is located inside the emergency unlocking device. The limit device includes a module mounting plate and a sliding module. The module mounting plate is fixed to the inner wall of the cable chamber. A connecting post is fixed at the end of the sliding module. The connecting post is inserted into the module mounting plate. A second compression spring is sleeved on the connecting post. The second compression spring is located between the module mounting plate and the sliding module.

[0007] To separate the tripping half-shaft and the tripping crank arm, the grounding switch tripping also includes a button socket and a crank arm mounting base. Both the button socket and the crank arm mounting base are connected to the mechanism frame. A tripping button is inserted into the button socket, and a pressure plate is fixed inside the tripping button. The tripping crank arm is rotatably connected to the crank arm mounting base via a pin. A steering plate is also connected to the tripping half-shaft. When closing the circuit, pressing the tripping button causes the pressure plate to rotate, causing the tripping half-shaft to rotate to the side of the tripping crank arm.

[0008] To reset the trip button, the button socket has a recessed hole, the trip button has a protrusion, the protrusion is located inside the recessed hole, and the trip button is also fitted with a spring, the spring being located between the protrusion and an inner wall of the recessed hole.

[0009] To guide the up-and-down movement of the locking rod, the mechanical locking device includes a fixed plate fixed to the mechanism frame, a guide plate mounted on the fixed plate, and the locking rod sliding within the guide plate.

[0010] In order for the locking rod to reset when the cable compartment door is closed, a pin is inserted into the locking rod, and a first compression spring is also sleeved on the locking rod, which is located between the pin and the inner wall of the guide fixing plate.

[0011] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: by opening the cable compartment door, the emergency unlocking device no longer presses against the sliding module, causing the sliding module to move outward under the action of the second compression spring, pulling the upper end of the transmission cable tube downward, thereby moving the limit plate to one side of the locking baffle, locking the rotation direction of the tripping half shaft, and making the tripping half shaft engage with the tripping crank arm to achieve grounding, thus ensuring that the gas cabinet is always in a grounded state when the cable compartment door is open, improving safety. At the same time, the elastic force of the second compression spring provides driving force, making operation stable. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0013] Figure 1 This is a schematic diagram of the grounding switch tripping structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the mechanical interlocking device for the grounding switch of this utility model (a uninterlocked state b interlocked state);

[0015] Figure 3 This is a schematic diagram of the limiting device of this utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the mechanical interlocking device for the grounding switch of this utility model;

[0017] In the diagram: 1. Tripping crank arm; 2. Tripping half-shaft; 21. Steering plate; 3. Tripping button; 31. Button socket; 32. Crank arm mounting base; 33. Pressure plate; 4. Locking rod; 41. Connecting plate; 42. Limiting plate; 5. Locking baffle; 6. Pin; 7. Fixing plate; 8. Guide fixing plate; 9. First compression spring; 10. Second compression spring; 101. Module mounting plate; 11. Sliding module; 12. Mechanism frame; 13. Fixed latch; 14. Variable speed cable conduit; 15. Cable compartment; 16. Emergency unlocking device; 17. Cable compartment door; A. Mechanical locking device; B. Limiting device. 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 Figures 1 to 4 The present invention provides a technical solution: a mechanical locking device for a gas-insulated switch cable compartment door and a grounding switch, comprising a cable compartment 15 and a mechanism frame 12. A cable compartment door 17 is hinged to one side of the cable compartment 15. An emergency unlocking device 16 is installed on the cable compartment door 17. The emergency unlocking device 16 is used to press the limiting device B and limit the mechanical locking device A. A grounding switch tripping and a mechanical locking device A are installed on the mechanism frame 12. The grounding switch tripping is used to connect the tripping crank arm 1 and the tripping half shaft 2 to achieve grounding. The mechanical locking device A is used to lock the tripping half shaft 2.

[0020] The grounding switch tripping mechanism includes a tripping half-shaft 2 and a tripping crank arm 1. A sleeve is formed on the crank arm mounting base 32, and the tripping half-shaft 2 is inserted into the sleeve, with one end of the tripping half-shaft 2 exposed on the outside. The tripping crank arm 1 rests on the tripping half-shaft 2 and is rotatably connected to the crank arm mounting base 32 via a pin. The grounding is achieved by the contact between the tripping half-shaft 2 and the tripping crank arm 1. The mechanical interlocking device A includes an interlocking rod 4 and an interlocking mechanism. A locking baffle 5 is connected to the tripping half-shaft 2 and rotates together with it. A connecting plate 41 is formed at the end of the locking rod 4, and a limit plate 42 is formed on the connecting plate 41. The limit plate 42 is located on one side of the locking baffle 5. A speed change cable 14 is connected to the lower end of the locking rod 4, and a limit device B is connected to the other end of the speed change cable 14. The limit device B is located inside the emergency unlocking device 16 and includes... The module mounting plate 101 and the sliding module 11 are fixed to the inner wall of the cable compartment 15. The end of the sliding module 11 is fixed with a connecting post, which is inserted into the module mounting plate 101. A second compression spring 10 is sleeved on the connecting post and is located between the module mounting plate 101 and the sliding module 11. After the cable compartment door 17 is opened, the emergency unlocking device 16 no longer presses the limit device B. Under the action of the second compression spring 10, the sliding module 11 will move outward, pulling the speed change cable tube 14 outward, causing the upper end of the speed change cable tube 14 to move downward, further driving the locking rod 4 to move downward, moving the limit plate 42 to one side of the locking baffle 5, so that the tripping half shaft 2 cannot rotate to the other side, and the tripping half shaft 2 and the tripping crank arm 1 are always connected together to achieve grounding. In this way, after the cable compartment door 17 is opened, the electrical cabinet is in a grounded state, which improves safety.

[0021] like Figure 1As shown, the grounding switch tripping also includes a button socket 31 and a crank arm mounting base 32. Both the button socket 31 and the crank arm mounting base 32 are bolted to the mechanism frame 12. A tripping button 3 is inserted into the button socket 31. The tripping button 3 moves within the button socket 31. A pressure plate 33 is fixed inside the tripping button 3 by bolts. The pressure plate 33 is clamped between nuts. The tripping crank arm 1 is rotatably connected to the crank arm mounting base 32 by a pin. A steering plate 21 is also connected to the tripping half shaft 2. When closing the circuit, pressing the tripping button 3 causes the pressure plate 33 to rotate the steering plate 21, causing the tripping half shaft 2 to rotate to one side of the tripping crank arm 1, thus disengaging the tripping crank arm 1 from the tripping half shaft 2.

[0022] The button socket 31 has a waist hole, and the trip button 3 has a protrusion formed inside the waist hole. The trip button 3 is also fitted with a spring, which is located between the protrusion and an inner wall of the waist hole. The spring applies a pushing force to the protrusion through the elastic force of the spring, so that the trip button 3 is reset after being pressed.

[0023] like Figure 2 As shown, the mechanical locking device A includes a fixed plate 7 connected to the mechanism frame 12, a guide fixed plate 8 installed on the fixed plate 7, and a locking rod 4 sliding in the guide fixed plate 8 to guide the up and down movement of the locking rod 4.

[0024] like Figure 2 As shown, a pin 6 is inserted into the locking rod 4, and a first compression spring 9 is also sleeved on the locking rod 4. The first compression spring 9 is located between the pin 6 and the inner wall of the guide fixing plate 78. The elastic force of the second compression spring 10 is greater than that of the first compression spring 9. When the cable compartment door 17 is locked, the elastic force of the second spring 10 is pressed and offset by the emergency unlocking device 16. In this way, the speed change cable tube 14 is no longer subjected to outward pulling force. The elastic force of the first compression spring 9 will push the pin 6 and the locking rod 4 to move upward, pushing the limiting plate 42 out from the side of the locking baffle 5, no longer limiting the locking baffle 5, and further unlocking the tripping half shaft 2, which can be pushed to rotate.

[0025] Workflow:

[0026] Grounding closing: When the cable compartment door is opened, the emergency unlocking device no longer presses against the limit device. The sliding module moves outward under the elastic force of the second compression spring. The sliding module pulls the transmission cable tube outward, which in turn drives the locking rod to move downward, moving the limit plate to one side of the locking baffle and limiting the locking baffle so that the tripping half shaft cannot rotate to one side, and so that the tripping half shaft is always connected with the tripping crank arm.

[0027] Unlocking the tripping device: When the cable compartment door is closed, the emergency unlocking device presses the limit device. Under the action of the second pressure spring, the locking rod moves upward and the limit plate moves to the outside. At this time, the locking baffle and the tripping half-shaft can rotate. Then, press the tripping button, and the pressure plate drives the steering plate and the tripping half-shaft to rotate. The tripping half-shaft rotates to the outside of the tripping crank arm, so that the tripping half-shaft and the tripping crank arm disengage.

[0028] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mechanical interlocking device for the cable compartment door and grounding switch of a gas-insulated switchgear, comprising a cable compartment and a mechanism frame, characterized in that: The cable compartment is connected to a cable compartment door at one end, and an emergency unlocking device is installed on the cable compartment door. The mechanism frame is equipped with a grounding switch tripping device and a mechanical locking device. The grounding switch tripping includes a tripping half-shaft and a tripping crank arm. The tripping crank arm rests on the tripping half-shaft to achieve grounding. The mechanical locking device includes a locking rod and a locking baffle. The locking baffle is located on the tripping half-shaft. A connecting plate is formed at the end of the locking rod. A limit plate is formed on the connecting plate. The limit plate is located on one side of the locking baffle. A speed-changing conduit is connected to the lower end of the locking rod. The other end of the speed-changing conduit is connected to the limit device. The limit device is located inside the emergency unlocking device. The limit device includes a module mounting plate and a sliding module. The module mounting plate is fixed to the inner wall of the cable chamber. A connecting post is fixed at the end of the sliding module. The connecting post is inserted into the module mounting plate. A second compression spring is sleeved on the connecting post. The second compression spring is located between the module mounting plate and the sliding module.

2. The mechanical interlocking device between the cable compartment door of a gas-insulated switchgear and the grounding switch according to claim 1, characterized in that: The grounding switch tripping also includes a button socket and a crank arm mounting base. Both the button socket and the crank arm mounting base are connected to the mechanism frame. A tripping button is inserted into the button socket, and a pressure plate is fixed inside the tripping button. The tripping crank arm is rotatably connected to the crank arm mounting base via a pin. A steering plate is also connected to the tripping half shaft. When closing the circuit, pressing the tripping button causes the pressure plate to rotate, causing the tripping half shaft to rotate to the side of the tripping crank arm.

3. The mechanical interlocking device between the cable compartment door of a gas-insulated switchgear and the grounding switch according to claim 2, characterized in that: The button socket has a waist hole, the trip button has a protrusion, the protrusion is located inside the waist hole, and the trip button is also fitted with a spring, the spring is located between the protrusion and an inner wall of the waist hole.

4. The mechanical interlocking device between the cable compartment door of a gas-insulated switchgear and the grounding switch according to claim 1, characterized in that: The mechanical locking device includes a fixed plate fixed to the mechanism frame, a guide fixed plate is installed on the fixed plate, and the locking rod slides within the guide fixed plate.

5. The mechanical interlocking device between the cable compartment door of a gas-insulated switchgear and the grounding switch according to claim 4, characterized in that: A pin is inserted into the locking rod, and a first compression spring is also sleeved on the locking rod. The first compression spring is located between the pin and the inner wall of the guide fixing plate.

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