Waterproof intelligent inflation cabinet for subway

Abstract

A waterproof intelligent gas-insulated switchgear for subways includes a cable compartment, a waterproof device for the operating mechanism, and a low-pressure compartment. The cable compartment is located at the bottom of the switchgear, and the upper part of the cable compartment is a gas box. The gas box includes a gas box shell, and the main circuit of the circuit breaker and the three-position disconnect switch is sealed inside the gas box shell. The circuit breaker operating mechanism and the three-position switch operating mechanism are exposed at the front of the gas box shell. A temperature detection unit and a partial discharge detection unit are fixed on the top of the gas box shell. The waterproof device for the operating mechanism is fixed at the front of the gas box and covers the circuit breaker operating mechanism and the three-position switch operating mechanism. The low-pressure compartment has a low-pressure compartment sealing device fixed inside, and low-pressure components are installed inside the low-pressure compartment sealing device. This protects the operating mechanisms of the three-position disconnect switch and the circuit breaker, as well as the instrument compartment, from moisture corrosion, improving waterproof performance. In addition, it can detect the temperature rise and partial discharge of the components inside the gas box in real time.

Description

Technical Field

[0001] This application relates to the technical field of gas-filled cabinets in power equipment, and particularly to a waterproof intelligent gas-filled cabinet for use in subways. Background Technology

[0002] Gas-insulated switchgear typically employs a modular design, consisting of a sealed enclosure, a low-pressure chamber, a cable chamber, and a pressure relief channel. The sealed enclosure is constructed using welding technology, and all high-voltage components are sealed within a sulfur hexafluoride gas chamber, providing a high level of protection. It can operate stably in harsh environments such as condensation, pollution, and salt spray. Therefore, gas-insulated switchgear is widely used in subway systems. Since subway electrical equipment is generally located underground, the underground environment is prone to high moisture content such as humidity and condensation. Therefore, switchgear used in subways needs to have extremely high waterproof performance. The main circuit of the gas-insulated switchgear is sealed within a stainless steel gas box, achieving a protection level of IP67. The gas box structure meets the waterproof requirements.

[0003] However, the operating mechanisms of the three-position disconnect switch and circuit breaker are exposed outside the gas box, making them more susceptible to corrosion and rust due to moisture. The failure of the lubricant inside the mechanism leads to a decrease in the smoothness of the transmission process, or even jamming. If the switch cannot be opened normally in an emergency, it will pose a great threat to the safe operation of the equipment and the subway.

[0004] The instrument room is the area for installing and arranging low-voltage components. It is an important unit for the electric and remote operation of control switchgear. The instrument room is also a part that is susceptible to moisture. Dampness in the instrument room can cause low-voltage components to discharge and burn out, affecting the safe operation of the equipment.

[0005] Because the switching components of the gas-insulated switchgear are sealed inside a stainless steel gas chamber, the condition of the components inside the chamber cannot be identified during routine maintenance. Temperature rise and partial discharge are unavoidable problems for electrical products. At the beginning of operation, the performance and quality of each component are reliable. However, as the operating time increases, temperature rise and partial discharge of the components will cause their performance to degrade, increasing the risk of equipment transportation. Therefore, real-time monitoring of temperature rise and partial discharge is particularly important. Utility Model Content

[0006] This utility model provides a waterproof intelligent gas-filled cabinet for subways, which realizes the operating mechanism of the three-position isolating switch and circuit breaker, and the instrument room is protected from water corrosion, thus improving waterproof performance. In addition, it can detect the temperature rise and partial discharge of the components inside the gas box in real time.

[0007] To achieve the aforementioned objectives, this application adopts the following technical solution:

[0008] A waterproof intelligent air-filled cabinet for subway use, characterized in that it includes:

[0009] The cable compartment is located at the lower part of the gas-filled cabinet. The upper part of the cable compartment is a gas box, which includes a gas box shell. The main circuit of the circuit breaker and the three-position disconnect switch is sealed inside the gas box shell. The circuit breaker operating mechanism and the three-position disconnect switch operating mechanism are exposed at the front of the gas box shell. A temperature detection unit and a partial discharge detection unit are fixed on the top of the gas box shell.

[0010] A waterproof device for the operating mechanism is fixed to the front of the air box. The waterproof device for the operating mechanism includes a waterproof device housing and covers the circuit breaker operating mechanism and the three-position disconnect switch operating mechanism.

[0011] A low-pressure chamber is located at the front of the cable chamber. A low-pressure chamber sealing device is fixed inside the low-pressure chamber, and low-pressure components are installed inside the low-pressure chamber sealing device.

[0012] In some optional embodiments, a pressure relief chamber is also included, wherein the rear of the cable chamber is configured as the pressure relief chamber, the pressure relief chamber is fixedly installed with the cable chamber and the air box respectively, the pressure relief chamber is connected to the interior of the cable chamber, and the pressure relief chamber is an integral structure that runs through the top and bottom.

[0013] In some alternative embodiments, the sealing device housing of the low-pressure chamber sealing device has an edge on the upper edge, and a retaining edge is provided on the edge, wherein the retaining edge formed on the side plate, top plate and bottom plate of the sealing device housing of the low-pressure chamber sealing device is at the same height.

[0014] In some optional embodiments, the side plates, top plates, and bottom plates of the sealing device housing of the low-pressure chamber sealing device are assembled and welded together, and the snap edges of the side plates, top plates, and bottom plates fit together after welding.

[0015] In some alternative embodiments, a fixing plate is symmetrically welded to the bottom of the sealing device housing, and the fixing plate is provided with mounting holes.

[0016] In some optional embodiments, the top plate of the sealing device housing of the low-pressure chamber sealing device is provided with two circular holes, and the top plate of the waterproof device housing is also provided with two circular holes, which are matched with the waterproof connector.

[0017] In some alternative embodiments, the low-pressure chamber sealing device further includes a sealing device sealing strip, and the operating mechanism waterproof device also includes the waterproof device sealing strip, both of which cooperate with the retaining edge.

[0018] In some alternative embodiments, the low-pressure chamber sealing device further includes a sealing device door panel, which is hinged to the sealing device housing, and the operating mechanism waterproofing device further includes a waterproofing device door panel, which is hinged to the waterproofing device housing.

[0019] In some alternative embodiments, a mechanism chamber is provided at the upper part of the low-pressure chamber and the front part of the gas box, and the mechanism chamber is provided with a waterproof device for the operating mechanism, which is fixed to the front part of the gas box.

[0020] In some optional embodiments, a rectangular hole is formed in the bottom plate of the waterproof device housing, and small round holes are formed around the rectangular hole. The planar dimension of the rectangular hole is larger than the maximum planar dimension of the circuit breaker operating mechanism and the three-position disconnect switch operating mechanism exposed at the front of the gas box. The waterproof device of the operating mechanism also includes a waterproof device gasket, which has a rectangular hole and small round holes formed around the rectangular hole. The shape and opening size of the waterproof device gasket are consistent with the shape and opening size of the bottom plate of the waterproof device housing, and the positions of the rectangular hole and the small round holes in the waterproof device gasket correspond to the positions of the rectangular hole and the small round holes in the bottom plate of the waterproof device housing. Stainless steel studs are welded to the front of the gas box, and the positions of the studs correspond to the positions of the small round holes on the bottom plate of the waterproof device housing and the waterproof device gasket, respectively.

[0021] The waterproof intelligent air-filled cabinet for subways provided in this application has the following beneficial effects:

[0022] The technical solution adopted in this application includes a waterproof intelligent gas-insulated switchgear for subways, comprising a cable compartment, a waterproof device for the operating mechanism, and a low-voltage compartment. The cable compartment is located at the bottom of the gas-insulated switchgear, and the upper part of the cable compartment is a gas box. The gas box includes a gas box shell, and the main circuit of the circuit breaker and the three-position disconnect switch is sealed inside the gas box shell. The circuit breaker operating mechanism and the three-position disconnect switch operating mechanism are exposed at the front of the gas box shell. A temperature detection unit and a partial discharge detection unit are fixed on the top of the gas box shell. The waterproof device for the operating mechanism is fixed at the front of the gas box and includes a waterproof device shell. The waterproof device covers the circuit breaker operating mechanism and the three-position disconnect switch operating mechanism. The low-voltage compartment is located at the front of the cable compartment. A low-voltage compartment sealing device is fixed inside the low-voltage compartment. Low-voltage components are installed inside the low-voltage compartment sealing device. This realizes the protection of the operating mechanism of the three-position disconnect switch and the circuit breaker, as well as the instrument compartment, from water corrosion, improving waterproof performance. In addition, it can detect the temperature rise and partial discharge of the components inside the gas box in real time. Attached Figure Description

[0023] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0024] Figure 1 This is a schematic diagram of the internal structure of a waterproof intelligent air-filled cabinet for use in subways according to this application;

[0025] Figure 2 This is an exploded view of a low-pressure chamber sealing device for a waterproof intelligent gas-filled cabinet used in a subway, as described in this application.

[0026] Figure 3 This is an exploded view of the waterproof device for the operating mechanism of a waterproof intelligent gas-filled cabinet used in a subway, as described in this application.

[0027] Figure 4 This is a perspective view of the air tank in a waterproof intelligent air-filled cabinet for use in subways, as described in this application.

[0028] Figure 5 This is a schematic diagram showing the installation status of the waterproof device for the operating mechanism in a waterproof intelligent air-filled cabinet used in a subway, as described in this application.

[0029] Figure label:

[0030] 10. Mechanism compartment; 11. Cable compartment; 12. Pressure relief compartment; 13. Gas box; 131. Gas box housing; 132. Stud; 14. Circuit breaker operating mechanism; 15. Three-position disconnector operating mechanism; 16. Temperature detection unit; 17. Partial discharge detection unit;

[0031] 20. Low-pressure chamber; 21. Low-pressure chamber sealing device; 22. Sealing device housing; 221. Edge; 222. Clamping edge; 223. Fixing plate; 224. Mounting hole; 225. Top plate; 226. Round hole; 227. Waterproof joint; 23. Sealing strip of sealing device; 24. Door panel of sealing device;

[0032] 30. Waterproof device for operating mechanism; 31. Housing of waterproof device; 32. Base plate; 32A. Rectangular hole; 32B. Small round hole; 33. Sealing gasket of waterproof device; 34. Door panel of waterproof device; 35. Sealing strip of waterproof device. Detailed Implementation

[0033] The specific embodiments of this application are described below with reference to the accompanying drawings and examples. Through the content described in this specification, those skilled in the art can clearly and completely understand the technical solution, the technical problem solved, and the resulting technical effects of this application. It is understood that the specific embodiments described herein are only for explaining this application and not for limiting it. Furthermore, for ease of description, only the parts related to this application are shown in the accompanying drawings.

[0034] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the contents described in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size should fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0035] The use of terms such as "first," "second," and "the" does not imply quantity limitation and may indicate singular or plural. The terms "comprising," "including," "having," and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or modules is not limited to the listed steps or units, but may also include steps or units not listed, or other steps or units inherent to such processes, methods, products, or devices. The terms "connected," "linked," and "coupled" used in this application are not limited to physical or mechanical connections, but may also include direct or indirect electrical connections.

[0036] It should also be noted that the longitudinal section corresponding to the embodiment of this application can be the section corresponding to the front view direction, the transverse section can be the section corresponding to the right view direction, and the horizontal section can be the section corresponding to the top view direction.

[0037] Furthermore, where there is no conflict, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] A waterproof intelligent air-filled cabinet for subway use includes a mechanism chamber 10, an operating mechanism waterproofing device 30, a low-pressure chamber 20, a low-pressure chamber sealing device 21, a cable chamber 11, a pressure relief chamber 12, and an air box 13.

[0039] The cable compartment 11 is located at the bottom of the gas-filled cabinet. The rear of the cable compartment 11 is configured as a pressure relief chamber 12, and the upper part of the cable compartment 11 is a gas box 13. The pressure relief chamber 12 is fixedly installed to both the cable compartment 11 and the gas box 13. The pressure relief chamber 12 is connected to the interior of the cable compartment 11, which allows the high pressure generated inside the equipment due to the accidental failure of the cable compartment 11 to be quickly discharged from the top of the cabinet through the pressure relief chamber 12, ensuring the safety of on-site equipment and personnel. In addition, the pressure relief chamber 12 is a one-piece structure that runs through the top and bottom, which enhances the strength of the pressure relief chamber 12. The gas box 13 includes a gas box housing 131, which is welded from stainless steel plates and has an IP67 protection rating. The main circuit of the circuit breaker and the three-position disconnect switch is sealed inside the gas box housing 131. The circuit breaker operating mechanism 14 and the three-position disconnect switch operating mechanism 15 are exposed at the front of the gas box housing 131, thus preventing the influence of external moisture, dirt, and other environmental factors on the internal components and improving the protection performance of the main circuit components. A temperature detection unit 16 and a partial discharge detection unit 17 are fixed on the top of the gas box housing 131. Due to the three-position disconnect... The isolating stationary contact of the switch is located at the rear of the gas box 13, enabling the temperature detection unit 16 and the partial discharge detection unit 17 to better monitor the temperature and partial discharge data of the switch operation status, such as the closing position. Furthermore, both the temperature detection unit 16 and the partial discharge detection unit 17 are equipped with detection probes and sealing rings. The detection probes are located inside the gas box housing 131 to accurately record the temperature and partial discharge data inside the gas box housing 131. The sealing rings ensure the sealing between the detection unit and the gas box housing 131, guaranteeing the normal operation of the component mechanism.

[0040] The front of the cable compartment 11 is configured as a low-pressure compartment 20. A low-pressure compartment sealing device 21 is fixed inside the low-pressure compartment 20. The sealing device housing 22 of the low-pressure compartment sealing device 21 has an edge 221, and a retaining edge 222 is provided on the edge 221. Specifically, the sealing device housing 22 of the low-pressure compartment sealing device 21 is welded from stainless steel. The sealing device housing 22 of the low-pressure compartment sealing device 21 is integrally formed by bending a cut plate. Its side plates, top plate 225, and bottom plate 32 are bent inwards to form the edge 221, and the edge 221 is bent outwards to form the retaining edge 222. The height of the retaining edges 222 formed on the top plate 225 and the bottom plate 32 is consistent. In addition, the side plates, top plate 225 and bottom plate 32 are assembled and welded together. After welding, the retaining edges 222 of the side plates, top plate 225 and bottom plate 32 fit together, realizing the sealing and waterproofing effect of the sealing device housing 22. Specifically, the welding process at the splicing of the side plates, top plate 225 and bottom plate 32 adopts the full welding process. The bottom of the sealing device housing 22 is symmetrically welded with fixing plates 223. The fixing plates 223 are provided with mounting holes 224. The mounting holes 224 are gourd-shaped to facilitate the installation and fixation of the low-pressure chamber sealing device 21. Two round holes 226 are provided on the top plate 225. The round holes 226 cooperate with the waterproof connector 227. The low-pressure components are placed inside the low-pressure chamber sealing device 21, and the wires entering and exiting the low-pressure chamber sealing device 21 pass through the waterproof connector 227. The waterproof connector 227 can prevent water from entering the interior of the low-pressure chamber sealing device 21. The low-pressure chamber sealing device 21 also includes a sealing strip 23. The sealing strip 23 cooperates with the retaining edge 222. Specifically, the sealing strip 23 is a self-clamping steel strip sealing strip. The self-clamping groove on the sealing strip 23 is clamped on the retaining edge 222 of the sealing device housing 22, thereby fixing the sealing strip 23. The material of the sealing strip 23 is EPDM rubber. The low-pressure chamber sealing device 21 also includes a sealing device door panel 24, which is hinged to the sealing device housing 22. The sealing device door panel 24 is made of stainless steel plate that has been bent and welded at the four corners. Specifically, when the sealing device door panel 24 is closed, it presses against the sealing strip 23, forming a sealed space inside the low-pressure chamber sealing device 21 to achieve a waterproof effect. A mechanism chamber 10 is located at the upper part of the low-pressure chamber 20 and the front part of the gas box 13. An operating mechanism waterproof device 30 is installed inside the mechanism chamber 10. The operating mechanism waterproof device 30 is fixed to the front of the gas box 13, covering the circuit breaker operating mechanism 14 and the three-position disconnect switch operating mechanism 15 exposed at the front of the gas box 13, to prevent the operating mechanism components from rusting and aging due to environmental factors, thus affecting the performance of the operating mechanism.

[0041] The waterproof device 30 of the operating mechanism includes a waterproof device housing 31, which is welded from stainless steel plate and is integrally formed. Its side plates, top plate 225, and bottom plate 32 are bent inwards to form an edge 221, and the edge 221 is bent outwards to form a retaining edge 222. The retaining edges 222 formed on the side plates, top plate 225, and bottom plate 32 are at the same height. A rectangular hole 32A is opened on the bottom plate 32, and small round holes 32B are opened around the perimeter of the rectangular hole 32A. The planar dimension of the rectangular hole 32A is larger than the maximum planar dimension of the circuit breaker operating mechanism 14 and the three-position disconnector operating mechanism 15 exposed at the front of the gas box 13, so as to achieve waterproofing of the exposed parts at the front of the gas box 13. The circuit breaker operating mechanism 14 and the three-position disconnector operating mechanism 15 are enclosed inside the waterproof device 30 of the operating mechanism. In addition, the side plates, top plates 225 and bottom plates 32 of the waterproof device housing 31 are assembled and welded together. After welding, the various clamping edges 222 fit together. The welding process at the splicing of the side plates, top plates 225 and bottom plates 32 adopts the full welding process. In addition, two round holes 226 are opened on the top plate 225 of the waterproof device housing 31. The round holes 226 also cooperate with the waterproof connectors 227. The secondary conductors of the circuit breaker operating mechanism 14 and the three-position disconnector operating mechanism 15 are connected to the low-voltage components or other related components in the low-voltage chamber sealing device 21 through the waterproof connectors 227. The waterproof device 30 of the operating mechanism also includes a waterproof device sealing strip 35. The self-clamping groove of the waterproof device sealing strip 35 is clamped on the clamping edge 222 of the waterproof device housing 31 to fix the waterproof device sealing strip 35. The waterproof device sealing strip 35 is a self-clamping steel strip sealing strip. It should be noted that the side plates of the sealing device housing 22 and the waterproof device housing 31 have a C-shaped structure. The top plate 225 includes an upper top plate and a lower top plate, and the side plates include a left side plate and a right side plate.

[0042] The operating mechanism waterproof device 30 also includes a waterproof device door panel 34. The door panel 34 is also made of stainless steel sheet, bent and welded at the four corners, and is hinged to the waterproof device housing 31. When the door panel 34 is closed, it presses against the waterproof device sealing strip 35, achieving a seal and waterproofing between the door panel 34 and the waterproof device housing 31. The operating mechanism waterproof device 30 also includes a waterproof device sealing gasket 33. The sealing gasket 33 has a rectangular hole 32A and small round holes 32B around it. The shape and opening size of the sealing gasket 33 are consistent with the shape and opening size of the bottom plate 32 of the waterproof device housing 31, and the positions of the rectangular hole 32A and small round holes 32B on the sealing gasket 33 correspond to the positions of the rectangular hole 32A and small round holes 32B on the bottom plate 32 of the waterproof device housing 31. The waterproof device 30 of the operating mechanism is fixed to the front of the air box 13. A stainless steel stud 132 is welded to the front of the air box 13. The position of the stud 132 corresponds to the position of the small round hole 32B on the bottom plate 32 of the waterproof device housing 31 and the sealing gasket 33 of the waterproof device. When fixing the waterproof device 30 of the operating mechanism, first pass the small round hole 32B on the sealing gasket 33 of the waterproof device through the stainless steel stud 132 at the front of the air box 13, then pass the bottom plate 32 of the waterproof device 30 through the stainless steel stud 132 at the front of the air box 13, and then tighten it with a nut. After tightening, the sealing gasket 33 of the waterproof device is compressed, and a seal is achieved between the waterproof device 30 of the operating mechanism and the air box 13. With the double seal of the waterproof device gasket 33 and the waterproof device sealing strip 35, the waterproof device 30 of the operating mechanism seals the circuit breaker operating mechanism 14 and the three-position disconnector operating mechanism 15 in a closed space, reducing the impact of moisture and condensation on the components of the circuit breaker operating mechanism 14 and the three-position disconnector operating mechanism 15, avoiding water erosion, and improving waterproof performance.

[0043] To facilitate understanding, the working principle of this application is further described as follows: For the waterproof intelligent gas-insulated switchgear used in subways, the waterproof device 30 for the operating mechanism provides waterproof sealing for the circuit breaker operating mechanism 14 and the three-position disconnector operating mechanism 15. This protects the circuit breaker operating mechanism 14 and the three-position disconnector operating mechanism 15 from corrosion, aging of plastic parts, and lubricant failure caused by external humidity and other environmental factors, ensuring smooth operation of the mechanisms and improving reliability; Low-pressure chamber sealing device 2... The configuration of unit 1 avoids problems such as poor contact and reduced insulation caused by condensation on low-voltage components operating in hot, humid, and fluctuating environments, which may lead to malfunctions. The temperature detection unit 16 and the partial discharge detection unit 17 can monitor the temperature changes and partial discharge conditions inside the gas box 13 in real time, preventing the insulation performance of the gas-filled switchgear from deteriorating due to temperature rise and partial discharge during operation, thus preventing the switchgear from breaking down and burning out. This effectively protects the components from external environmental corrosion and monitors the internal temperature and partial discharge conditions of the gas box 13 in real time, promptly identifying potential safety hazards and ensuring the normal operation of the equipment.

[0044] This application adopts a modular design. To address the waterproofing issues of the control chamber 10 and the low-voltage chamber 20, a waterproofing device 30 for the operating mechanism is installed inside the control chamber 10. This device seals the circuit breaker operating mechanism 14 and the three-position disconnector operating mechanism 15, which are exposed outside the gas box 13, within the waterproofing device 30. Similarly, a low-voltage chamber sealing device 21 is installed inside the low-voltage chamber 20, sealing the low-voltage components within this device to achieve both sealing and waterproofing. To monitor the temperature and partial discharge inside the gas box 13 in real time, a temperature detection unit 16 and a partial discharge detection unit 17 are installed on the top of the gas box 13. These units transmit real-time temperature and partial discharge values ​​wirelessly to the monitoring device, allowing maintenance personnel to monitor the status of the switchgear in real time.

[0045] Although this application has been described and illustrated with reference to specific embodiments thereof, such description and illustration are not limiting of this application. It will be readily understood by those skilled in the art that various changes can be made and equivalent elements can be substituted within embodiments without departing from the true spirit and scope of this application as defined by the appended claims. Illustrations may not be drawn to scale. Differences may exist between the technical representation in this application and actual implementation due to variables in the manufacturing process, etc. Other embodiments of this application may exist that are not specifically described. The description and illustrations should be considered illustrative rather than restrictive. Modifications can be made to adapt particular circumstances, materials, composition, methods, or processes to the objectives, spirit, and scope of this application. All such modifications fall within the scope of the appended claims. While the methods disclosed herein have been described with reference to specific operations performed in a particular order, it should be understood that these operations can be combined, subdivided, or reordered to form equivalent methods without departing from the teachings of this application. Therefore, unless specifically indicated herein, the order and grouping of operations do not limit this application.

Claims

1. A waterproof intelligent air-filled cabinet for subway use, characterized in that, include Cable compartment (11), the cable compartment (11) is located at the lower part of the gas-filled cabinet, the upper part of the cable compartment (11) is the gas box (13), the gas box (13) includes a gas box shell (131), the main circuit of the circuit breaker and the three-position disconnect switch is sealed inside the gas box shell (131), the circuit breaker operating mechanism (14) and the three-position disconnect switch operating mechanism (15) are exposed at the front of the gas box shell (131), and a temperature detection unit (16) and a partial discharge detection unit (17) are fixed on the top of the gas box shell (131); The operating mechanism waterproof device (30) is fixed to the front of the air box (13). The operating mechanism waterproof device (30) includes a waterproof device housing (31). The operating mechanism waterproof device (30) covers the circuit breaker operating mechanism (14) and the three-position disconnect switch operating mechanism (15). Low-pressure chamber (20) is located at the front of the cable chamber (11). A low-pressure chamber sealing device (21) is fixed inside the low-pressure chamber (20). Low-pressure components are installed inside the low-pressure chamber sealing device (21).

2. The waterproof intelligent air-filled cabinet for subways according to claim 1, characterized in that, It also includes a pressure relief chamber (12), the rear of the cable chamber (11) is configured as the pressure relief chamber (12), the pressure relief chamber (12) is fixedly installed with the cable chamber (11) and the air box (13) respectively, the pressure relief chamber (12) is connected to the interior of the cable chamber (11), and the pressure relief chamber (12) is an integrated structure that runs through the top and bottom.

3. The waterproof intelligent air-filled cabinet for subways according to claim 2, characterized in that, The sealing device housing (22) of the low-pressure chamber sealing device (21) has an edge (221) on the upper side, and a retaining edge (222) is provided on the edge (221). The retaining edge (222) formed on the side plate, top plate (225) and bottom plate (32) of the sealing device housing (22) of the low-pressure chamber sealing device (21) has the same height.

4. The waterproof intelligent air-filled cabinet for subways according to claim 3, characterized in that, The side plate, top plate (225) and bottom plate (32) of the sealing device housing (22) of the low-pressure chamber sealing device (21) are assembled and welded together, and the clamping edges (222) of the side plate, top plate (225) and bottom plate (32) are fitted together after welding.

5. The waterproof intelligent air-filled cabinet for subways according to claim 4, characterized in that, The bottom of the housing (22) of the sealing device is symmetrically welded with a fixing plate (223), and the fixing plate (223) is provided with mounting holes (224).

6. The waterproof intelligent air-filled cabinet for subways according to claim 5, characterized in that, The sealing device housing (22) of the low-pressure chamber sealing device (21) has two round holes (226) on its top plate (225) and the waterproof device housing (31) also has two round holes (226) on its top plate (225). The round holes (226) are matched with the waterproof connector (227).

7. The waterproof intelligent air-filled cabinet for subways according to claim 6, characterized in that, The low-pressure chamber sealing device (21) also includes a sealing device sealing strip (23), and the operating mechanism waterproof device (30) also includes the waterproof device sealing strip (35). Both the sealing device sealing strip (23) and the waterproof device sealing strip (35) cooperate with the clamp edge (222).

8. The waterproof intelligent air-filled cabinet for subways according to claim 7, characterized in that, The low-pressure chamber sealing device (21) also includes a sealing device door plate (24), which is hinged to the sealing device housing (22). The operating mechanism waterproof device (30) also includes a waterproof device door plate (34), which is hinged to the waterproof device housing (31).

9. The waterproof intelligent air-filled cabinet for subways according to claim 8, characterized in that, The upper part of the low-pressure chamber (20) and the front part of the air box (13) are provided with a mechanism chamber (10). The interior of the mechanism chamber (10) is provided with the waterproof device (30) of the operating mechanism, and the waterproof device (30) of the operating mechanism is fixed to the front part of the air box (13).

10. The waterproof intelligent air-filled cabinet for subways according to claim 9, characterized in that, The bottom plate (32) of the waterproof device housing (31) has a rectangular hole (32A) and small round holes (32B) around the rectangular hole (32A). The planar dimension of the rectangular hole (32A) is larger than the maximum planar dimension of the circuit breaker operating mechanism (14) and the three-position disconnect switch operating mechanism (15) exposed at the front of the gas box (13). The waterproof device (30) of the operating mechanism also includes a waterproof device sealing gasket (33). The waterproof device sealing gasket (33) has a rectangular hole (32A) and small round holes (32B) around the rectangular hole (32A). 3) The shape and opening size are consistent with the shape and opening size of the bottom plate (32) of the waterproof device housing (31), and the positions of the rectangular hole (32A) and the small round hole (32B) opened on the waterproof device sealing gasket (33) correspond to the positions of the rectangular hole (32A) and the small round hole (32B) opened on the bottom plate (32) of the waterproof device housing (31). The front of the air box (13) is welded with a stainless steel stud (132), and the position of the stud (132) corresponds to the position of the small round hole (32B) on the bottom plate (32) of the waterproof device housing (31) and the waterproof device sealing gasket (33).

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