Gas-insulated switchgear

Abstract

The utility model belongs to the technical field of gas-insulated switchgears, and discloses a gas-insulated switchgear, which comprises an operation room, a cable room, a cross beam, a handle assembly and an interlocking plate. An operating mechanism used for controlling closing and opening of the grounding switch is arranged in the operating chamber, and the cable chamber is provided with a cabinet door. The cross beam can be connected with an operation room and / or a cable room, and the cross beam is provided with an open groove and a first communication port communicated with the open groove; the handle assembly is arranged at the upper end of the cabinet door, when the cabinet door is closed, the handle assembly can cover the opening of the open groove, and the handle assembly is provided with an insertion port; the interlocking plate penetrates through the first communication port, one end of the interlocking plate is connected with the operating mechanism, the other end of the interlocking plate is provided with an insertion plate, and the insertion plate extends into the open groove and can be inserted and limited in the insertion port through a notch of the open groove, so that the operating mechanism is interlocked with the cabinet door through the interlocking plate. According to the gas-insulated switchgear, holes are prevented from being formed in the bottom plate of the operation room, and the arcing resistance of the gas-insulated switchgear is not affected.

Description

Technical Field

[0001] This utility model relates to the field of gas-filled cabinet technology, and in particular to a gas-filled cabinet. Background Technology

[0002] To ensure the safe operation of the gas-insulated switchgear, it needs to have a complete five-proof interlock system. One of these interlocks is to prevent accidental entry into the energized cable room. Specifically, the switchgear door can only be opened when the grounding switch is in the closed position, and the grounding switch can only be operated to open the switchgear after the door is closed, so as to ensure the personal safety of maintenance personnel.

[0003] To address the aforementioned issues, gas-insulated switchgear typically incorporates an interlocking rod. This rod extends from the control room into the cable compartment to interlock the grounding switch and the switchgear door. This design requires an opening in the control room's floor plate for the interlocking rod to pass through. However, this opening compromises the gas-insulated switchgear's arc-resistance performance. Specifically, when a short circuit occurs in the cable compartment, the energy generated by the arc can easily enter the control room through the opening, damaging the operating mechanism and other components. In severe cases, it can even impair the operating mechanism's opening and closing mechanisms, potentially leading to more serious accidents. Utility Model Content

[0004] The purpose of this invention is to provide a gas-filled cabinet that does not affect the anti-arc arc performance.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] An air-filled cabinet includes an operating room and a cable compartment. The operating room includes an operating mechanism, and the cable compartment is equipped with a door. The air-filled cabinet also includes:

[0007] A crossbeam is connected to the operating room and / or the cable room, and the crossbeam is provided with an open slot and a first connecting port communicating with the open slot;

[0008] A handle assembly is provided on the cabinet door. When the cabinet door is closed, the handle assembly covers the opening of the open slot. The handle assembly is provided with a plug interface.

[0009] A chain plate is inserted into the first communication port. One end of the chain plate is connected to the operating mechanism, and the other end is provided with an insert plate. The insert plate extends through the first communication port into the open slot and can be inserted into the insert interface.

[0010] As an alternative, the handle assembly includes:

[0011] A handle body is disposed on the cabinet door. The handle body has a receiving cavity. A second connecting port is provided on the inner side wall of the receiving cavity near the open groove. The cross-sectional area of ​​the second connecting port is larger than the cross-sectional area of ​​the insertion interface.

[0012] An unlocking plate is disposed on the inner side wall of the receiving cavity. The unlocking plate is provided with the insertion interface. The insertion plate passes through the second communication port and is snapped into the insertion interface.

[0013] As an alternative, the unlocking plate and the handle body are detachably connected. When the unlocking plate is in the detached state, the unlocking plate can move relative to the handle body. Along the moving direction of the unlocking plate, the unlocking plate is also provided with a clearance notch located on one side of the insertion interface and communicating with the insertion interface. The movement of the unlocking plate causes the insertion plate to switch from the insertion interface to the clearance notch. The clearance notch extends toward the cabinet door to release the restriction on the locking plate.

[0014] As an alternative, the unlocking plate is fixed to the inner wall of the receiving cavity by screws;

[0015] The handle body is provided with a through hole communicating with the receiving cavity, the through hole being used to loosen the screw so that the unlocking plate can be moved.

[0016] As an alternative, along the moving direction of the unlocking plate, one end of the unlocking plate is provided with a side plate, and the side plate is provided with a pull hole for pulling the unlocking plate to move.

[0017] As an alternative, the handle body includes a first U-shaped bending plate and a handle plate. The first U-shaped bending plate is disposed on the cabinet door and has a first U-shaped groove. The handle plate is connected to the first U-shaped bending plate to cover the first U-shaped groove and form the receiving cavity.

[0018] As an alternative, the handle plate is provided with a pull handle.

[0019] As an optional solution, the interlocking plate includes a main board, an upper folding plate disposed at one end of the main board, and an insert plate disposed at the other end of the main board. The upper folding plate is connected to the operating mechanism. The main board passes through the first communication port. The main board is provided with a limiting hole, which is used to allow a limiting member to be inserted to restrict the interlocking plate from moving upward.

[0020] As an alternative, the crossbeam includes a second U-shaped bend plate and a cover plate. The second U-shaped bend plate is connected to the operating chamber and / or the cable chamber. The second U-shaped bend plate has a second U-shaped groove. The cover plate is connected to the second U-shaped bend plate and closes a portion of the second U-shaped groove near the operating chamber, so that the other portion of the second U-shaped groove forms the open groove. When the limiting member is inserted into the limiting hole, it abuts against the cover plate to form a limiting position, thereby restricting the upward movement of the interlocking plate.

[0021] As an alternative, the cover plate includes a third U-shaped bending plate and a lower bending plate connected to the lower end of the third U-shaped bending plate. The third U-shaped bending plate and the second U-shaped bending plate are interlocked to close a portion of the second U-shaped groove, and the lower bending plate is fixedly attached to the bottom of the other portion of the second U-shaped groove.

[0022] The beneficial effects of this utility model are:

[0023] The gas-filled cabinet provided by this utility model has a crossbeam and a handle assembly, so that the interlocking plate passes through the first connecting port of the crossbeam and the insert plate can extend into the open slot and be inserted into the insertion interface of the handle assembly at the upper end of the cabinet door through the slot of the open slot. This realizes the interlocking between the cabinet door and the operating mechanism, avoids opening holes in the bottom plate of the operating room, and does not affect the anti-arc performance of the gas-filled cabinet. Attached Figure Description

[0024] Figure 1 This is a first structural schematic diagram of the gas-filled cabinet provided in this embodiment of the utility model;

[0025] Figure 2 yes Figure 1 Schematic diagram of the structure at point A;

[0026] Figure 3 This is a schematic diagram of the second structure of the gas-filled cabinet provided in this embodiment of the utility model;

[0027] Figure 4 yes Figure 3 Schematic diagram of the structure at point B;

[0028] Figure 5 This is a schematic diagram of the third structure of the gas-filled cabinet provided in this embodiment of the utility model;

[0029] Figure 6 yes Figure 5 Schematic diagram of the structure at point C;

[0030] Figure 7 A schematic diagram of the fourth structure of the gas-filled cabinet provided in this embodiment of the utility model;

[0031] Figure 8 yes Figure 7 Schematic diagram of the structure at point D;

[0032] Figure 9 This is a schematic diagram of the unlocking plate involved in the embodiment of this utility model;

[0033] Figure 10 A fifth structural schematic diagram of the gas-filled cabinet provided in this embodiment of the utility model;

[0034] Figure 11 yes Figure 10 Schematic diagram of the structure at point E;

[0035] Figure 12 This is a schematic diagram of the interlocking plate involved in the embodiment of this utility model.

[0036] In the picture:

[0037] 1. Control room; 11. Control mechanism; 111. Transmission assembly; 1111. Baffle; 112. Control shaft;

[0038] 2. Cable compartment; 21. Cabinet door;

[0039] 3. Crossbeam; 31. Second U-shaped bend plate; 311. Opening groove; 32. Cover plate; 321. Third U-shaped bend plate; 322. Lower bend plate; 33. First connecting opening;

[0040] 4. Handle assembly; 41. Handle body; 411. First U-shaped bending plate; 412. Handle plate; 4121. Handle; 4122. Through hole; 413. Receiving cavity; 4131. Second connecting port; 42. Unlocking plate; 421. Insertion interface; 422. Clearance notch; 423. Side plate; 4231. Pull hole;

[0041] 5. Interlocking plate; 51. Main board; 511. Limiting hole; 52. Upper folding plate; 53. Insertion plate;

[0042] 100. Limiting components. Detailed Implementation

[0043] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0044] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0047] like Figures 1-2 As shown in the figure, this utility model embodiment provides a gas-filled cabinet, which includes an operating room 1 and a cable compartment 2. The operating room 1 is equipped with an operating mechanism 11 for controlling the closing and opening of the grounding switch, and the cable compartment 2 is equipped with a cabinet door 21.

[0048] To enable the interlocking of the operating mechanism 11 and the cabinet door 21, the gas cabinet also includes a crossbeam 3, a handle assembly 4, and an interlocking plate 5. The crossbeam 3 is located at the connection between the operating room 1 and the cable room 2, and is located outside the operating room 1 and the cable room 2. The crossbeam 3 can be connected to the operating room 1, or to the cable room 2, or to both the operating room 1 and the cable room 2. The crossbeam 3 is provided with an open groove 311 and a first connecting port 33 connected to the open groove 311. The opening of the open groove 311 is set outward. The handle assembly 4 is set at the upper end of the cabinet door 21. When the cabinet door 21 is closed, the handle assembly 4 can cover the opening of the open groove 311. The handle assembly 4 is provided with a plug interface 421. The interlocking plate 5 is inserted into the first connecting port 33. One end is connected to the operating mechanism 11, and the other end is provided with a plug plate 53. The plug plate 53 extends into the open groove 311 and can be inserted into the plug interface 421 through the opening of the open groove 311, so as to realize that the operating mechanism 11 is interlocked with the cabinet door 21 through the interlocking plate 5.

[0049] The gas-filled cabinet is designed with a crossbeam 3 and a handle assembly 4, so that the interlocking plate 5 passes through the first connecting port 33 of the crossbeam 3. The insert plate 53 can extend into the open slot 311 and be inserted into the insertion interface 421 of the handle assembly 4 at the upper end of the cabinet door 21 through the slot of the open slot 311. This achieves the interlocking of the cabinet door 21 and the operating mechanism 11, avoids opening holes in the bottom plate of the operating room 1, and does not affect the anti-arc performance of the gas-filled cabinet.

[0050] In this embodiment, as Figures 3-4As shown, the operating mechanism 11 is connected to the interlocking plate 5 via the transmission assembly 111. When the grounding switch is tripped, the operating mechanism 11, through the transmission assembly, positions the interlocking plate 5 in the lower position and inserts it into the insertion interface 421. Furthermore, the operating mechanism 11 can restrict the upward movement of the interlocking plate 5; therefore, the cabinet door 21 cannot be lifted and opened. Figures 5-6 As shown, when the grounding switch is closed, the transmission component 111 of the operating mechanism 11 is released from its restriction, and the interlocking plate 5 is released from its restriction on the cabinet door 21. At this time, the cabinet door 21 can be lifted and opened. Furthermore, due to the self-restoring force of the spring inside the transmission component 111, the interlocking plate 5 and the baffle 1111 of the transmission component 111 move upward and abut against the operating shaft 112 of the operating mechanism 11, blocking the rotation of the operating shaft 112 to restrict the grounding switch from opening. Only when the cabinet door 21 is closed again will the cabinet door 21 cause the interlocking plate 5 to move downward, thereby causing the baffle 1111 of the transmission component 111 to move downward. The baffle 1111's obstruction of the operating shaft 112 is released, and at this time, the grounding switch can be opened.

[0051] Optionally, refer to Figure 2 and combined Figure 6 As shown, the handle assembly 4 includes a handle body 41 and an unlocking plate 42. The handle body 41 has a receiving cavity 413 and is disposed at the upper end of the cabinet door 21. The receiving cavity 413 is provided with a second connecting port 4131 near the inner wall of the open groove 311. The unlocking plate 42 is disposed on the inner wall of the receiving cavity 413 and is provided with an insertion interface 421. The insertion plate 53 passes through the second connecting port 4131 and is engaged in the insertion interface 421 to realize the interlocking of the cabinet door 21 and the interlocking plate 5. In this structure, the unlocking plate 42 is connected to the handle body 41, and the cross-sectional area of ​​the second connecting port 4131 is larger than that of the insertion port 421. This facilitates the processing of the handle body 41, reduces the processing precision required for the handle body 41, and allows for easy adjustment of the position of the unlocking plate 42 relative to the handle body 41, so that the insertion plate 53 can be accurately inserted into the insertion port 421. Furthermore, the unlocking plate 42 is placed inside the receiving cavity 413, so that the unlocking plate 42 is hidden within the receiving cavity 413, preventing accidental disassembly of the unlocking plate 42. In addition, when the cabinet door 21 is opened, the insertion plate 53 is located in the second connecting port 4131 and separated from the insertion port 421. Since the second connecting port 4131 does not limit the insertion plate 53, the interlocking plate 5 moves upward due to the self-restoring force of the spring inside the transmission assembly 111.

[0052] In an emergency, in order to open cabinet door 21 when the grounding switch is not closed, such as... Figures 7-9As shown, specifically, the unlocking plate 42 is also provided with a clearance notch 422 communicating with the insertion interface 421, and the unlocking plate 42 and the handle body 41 are detachably connected. When the unlocking plate 42 is in the detached state, the unlocking plate 42 can move relative to the handle body 41. Along the moving direction of the unlocking plate 42, the clearance notch 422 is provided on one side of the insertion interface 421. When it is necessary to open the cabinet door 21 urgently, the insertion plate 53 can be switched from the insertion interface 421 to the clearance notch 422 by driving the unlocking plate 42 to move. The clearance notch 422 extends toward the cabinet door 21 to unlock the restriction on the insertion plate 53. That is, the clearance notch 422 extends toward the cabinet door 21 to form an unlocking area, so that when the cabinet door 21 is lifted, the restriction of the insertion plate 53 on the unlocking plate 42 can be unlocked through the unlocking area, and the interlock between the interlocking plate 5 and the cabinet door 21 is released. It is understandable that the cross-sectional area of ​​the second connecting port 4131 is greater than the cross-sectional area of ​​the clearance notch 422, meaning that the second connecting port 4131 does not impose any restriction on the insert plate 53.

[0053] Optionally, the handle body 41 includes a first U-shaped bent plate 411 and a handle plate 412 disposed on the upper end of the cabinet door 21. The first U-shaped bent plate 411 is provided with a first U-shaped groove, the opening of the first U-shaped groove facing outward. The handle plate 412 is connected to the first U-shaped bent plate 411 to cover the first U-shaped groove and form a receiving cavity 413. By setting the handle body 41 as a separate first U-shaped bent plate 411 and handle plate 412, the installation of the unlocking plate 42 is facilitated, and the structural design is reasonable.

[0054] Optionally, the unlocking plate 42 is screwed onto the inner wall of the receiving cavity 413. The handle plate 412 has a through hole 4122 communicating with the receiving cavity 413. In case of emergency unlocking of the cabinet door 21, the operator can use a tool to loosen the screw through the through hole 4122, thereby releasing the screw from locking the unlocking plate 42 and allowing it to move. Of course, after normal operation, the unlocking plate 42 moves back to its original position, and the unlocking plate 42 is then fixed in place with screws using tools to ensure normal use.

[0055] In this embodiment, the unlocking plate 42 is mounted on the inner wall of the receiving cavity 413 by two screws, and the handle plate 412 is provided with two through holes 4122 that correspond one-to-one with the two screws.

[0056] To facilitate the movement of the unlocking plate 42, a side plate 423 is provided at one end of the unlocking plate 42 along the moving direction of the unlocking plate 42. The side plate 423 is provided with a pull hole 4231. When the unlocking plate 42 needs to be moved, a pull rod with a barb at the end can be inserted into the receiving cavity 413 through the hole on one side of the handle body 41 and locked into the pull hole 4231 to pull the unlocking plate 42.

[0057] In this embodiment, a side plate 423 is also provided at the other end of the unlocking plate 42. It can be understood that the side plate 423 at the other end of the unlocking plate 42 may not be provided with pull holes 4231, so that the structural design is reasonable and the whole is not easily deformed.

[0058] To facilitate opening the cabinet door 21 by lifting the handle body 41, the handle plate 412 is provided with a handle 4121.

[0059] Specifically, such as Figures 10-12 As shown, the interlocking plate 5 includes a main board 51, an upper folding plate 52 disposed at one end of the main board 51, and an insert plate 53 disposed at the other end of the main board 51. The upper folding plate 52 is connected to the transmission component 111 of the operating mechanism 11. The main board 51 passes through the first connecting port 33 and is provided with a limiting hole 511. After the cabinet door 21 is opened, the operator can use the limiting member 100 (such as a screwdriver) to insert into the limiting hole 511 to make the interlocking plate 5 move downward, so that the grounding switch can be temporarily unlocked when the cabinet door 21 is in the open state. That is, when the interlocking plate 5 moves downward, it will drive the baffle 1111 to move downward at the same time to release the restriction of the baffle 1111 on the operating shaft 112.

[0060] Optionally, the crossbeam 3 includes a second U-shaped bending plate 31 and a cover plate 32. The second U-shaped bending plate 31 is connected to the operating chamber 1 and / or the cable chamber 2. The second U-shaped bending plate 31 has a second U-shaped groove. The cover plate 32 is connected to the second U-shaped bending plate 31 to close a portion of the second U-shaped groove near the operating chamber 1, so that the other part of the second U-shaped groove forms an open groove 311. By setting the crossbeam 3 as a separate second U-shaped bending plate 31 and cover plate 32, the second U-shaped bending plate 31 and cover plate 32 can be interlocked to form a first connecting opening 33, so that the interlocking plate 5 can be smoothly inserted into the first connecting opening 33, and the first connecting opening 33 and the main plate 51 of the interlocking plate 5 can be precisely matched to guide the interlocking plate 5 through the first connecting opening 33; and when the limiting member 100 is inserted into the limiting hole 511, it can abut against the cover plate 32 to form a limiting, thereby restricting the upward movement of the interlocking plate 5.

[0061] When the limit member 100 is inserted into the limit hole 511, the operating shaft 112 remains unlocked. At this time, the grounding switch can be operated to the open state. After the operator finishes the operation, the grounding switch can be operated to close the circuit. Then the limit member 100 is removed. Due to the self-resetting force of the spring inside the transmission assembly 111, the interlocking plate 5 and the baffle 1111 move upward. The baffle 1111 locks and resets the operating shaft 112.

[0062] Furthermore, the cover plate 32 includes a third U-shaped bending plate 321 and a lower bending plate 322 connected to the lower end of the third U-shaped bending plate 321. The third U-shaped bending plate 321 and the second U-shaped bending plate 31 are interlocked to close a part of the second U-shaped groove. The lower bending plate 322 is fixedly attached to the bottom of the other part of the second U-shaped groove. The limiting member 100 is located in the open groove 311 and can abut against the third U-shaped bending plate 321 to limit the upward movement of the limiting member 100.

[0063] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An air-filled cabinet, comprising an operating room (1) and a cable compartment (2), wherein the operating room (1) includes an operating mechanism (11), and the cable compartment (2) is provided with a cabinet door (21), characterized in that, The gas-filled cabinet also includes: A crossbeam (3) is connected to the operating room (1) and / or the cable room (2). The crossbeam (3) is provided with an open slot (311) and a first connecting port (33) communicating with the open slot (311). A handle assembly (4) is provided on the cabinet door (21). When the cabinet door (21) is closed, the handle assembly (4) covers the opening of the open groove (311). The handle assembly (4) is provided with a plug-in interface (421). A chain plate (5) is inserted into the first communication port (33). One end of the chain plate (5) is connected to the operating mechanism (11), and the other end is provided with a plug plate (53). The plug plate (53) extends through the first communication port (33) into the open slot (311) and can be inserted into the plug interface (421).

2. The gas-filled cabinet according to claim 1, characterized in that, The handle assembly (4) includes: The handle body (41) is disposed on the cabinet door (21). The handle body (41) has a receiving cavity (413). The receiving cavity (413) has a second connecting port (4131) on the inner side wall near the open groove (311). The cross-sectional area of ​​the second connecting port (4131) is larger than the cross-sectional area of ​​the insertion interface (421). The unlocking plate (42) is disposed on the inner side wall of the receiving cavity (413). The unlocking plate (42) is provided with the insertion interface (421). The insertion plate (53) passes through the second communication port (4131) and is snapped into the insertion interface (421).

3. The gas-filled cabinet according to claim 2, characterized in that, The unlocking plate (42) and the handle body (41) are detachably connected. When the unlocking plate (42) is in the detached state, the unlocking plate (42) can move relative to the handle body (41). Along the moving direction of the unlocking plate (42), the unlocking plate (42) is also provided with a clearance notch (422) located on one side of the insertion interface (421) and communicating with the insertion interface (421). The movement of the unlocking plate (42) causes the insertion plate (53) to switch from the insertion interface (421) to the clearance notch (422). The clearance notch (422) extends toward the cabinet door (21) to release the restriction on the insertion plate (53).

4. The gas-filled cabinet according to claim 3, characterized in that, The unlocking plate (42) is fixed to the inner wall of the receiving cavity (413) by screws; The handle body (41) is provided with a through hole (4122) communicating with the receiving cavity (413), the through hole (4122) being used to loosen the screw so that the unlocking plate (42) can move.

5. The gas-filled cabinet according to claim 3, characterized in that, Along the moving direction of the unlocking plate (42), one end of the unlocking plate (42) is provided with a side plate (423), and the side plate (423) is provided with a pull hole (4231) for pulling the unlocking plate (42) to move.

6. The gas-filled cabinet according to claim 2, characterized in that, The handle body (41) includes a first U-shaped bending plate (411) and a handle plate (412). The first U-shaped bending plate (411) is disposed on the cabinet door (21). The first U-shaped bending plate (411) is provided with a first U-shaped groove. The handle plate (412) is connected to the first U-shaped bending plate (411) to cover the first U-shaped groove and form the receiving cavity (413).

7. The gas-filled cabinet according to claim 6, characterized in that, The handle plate (412) is provided with a handle (4121).

8. The gas-filled cabinet according to claim 1, characterized in that, The interlocking plate (5) includes a main board (51), an upper folding plate (52) disposed at one end of the main board (51), and an insert plate (53) disposed at the other end of the main board (51). The upper folding plate (52) is connected to the operating mechanism (11). The main board (51) passes through the first communication port (33). The main board (51) is provided with a limiting hole (511). The limiting hole (511) is used to allow the limiting member (100) to be inserted to restrict the interlocking plate (5) from moving upward.

9. The gas-filled cabinet according to claim 8, characterized in that, The crossbeam (3) includes a second U-shaped bending plate (31) and a cover plate (32). The second U-shaped bending plate (31) is connected to the operating chamber (1) and / or the cable chamber (2). The second U-shaped bending plate (31) has a second U-shaped groove. The cover plate (32) is connected to the second U-shaped bending plate (31) and closes a portion of the second U-shaped groove near the operating chamber (1) so that the other portion of the second U-shaped groove forms the open groove (311). When the limiting member (100) is inserted into the limiting hole (511), it abuts against the cover plate (32) to form a limiting, thereby restricting the upward movement of the interlocking plate (5).

10. The gas-filled cabinet according to claim 9, characterized in that, The cover plate (32) includes a third U-shaped bending plate (321) and a lower bending plate (322) connected to the lower end of the third U-shaped bending plate (321). The third U-shaped bending plate (321) and the second U-shaped bending plate (31) are interlocked to close a part of the second U-shaped groove. The lower bending plate (322) is fixedly attached to the bottom of the other part of the second U-shaped groove.

Images