Automatic leak-repairing gas-filled cabinet

Abstract

The utility model belongs to the technical field of gas-filled cabinets, and discloses an automatic leak repairing gas-filled cabinet which comprises a shell which is of a double-layer structure and comprises an inner wall and an outer wall. A closed interlayer inner cavity is formed between the inner wall and the outer wall; the inner cavity of the interlayer is filled with leakage repairing liquid, and the leakage repairing liquid is liquid which can be solidified when encountering air; the inner wall is provided with a one-way valve, the one-way valve is communicated with the cabinet cavity of the gas-insulated switchgear and the interlayer inner cavity, and gas is allowed to flow into the interlayer inner cavity from the cabinet cavity in a one-way mode. The leakage repairing process of the inflatable cabinet does not need manual intervention, the response is rapid, the maintenance timeliness is greatly improved, the manpower maintenance cost is remarkably reduced, and meanwhile, the reliability and the safety of the operation of the inflatable cabinet are guaranteed to the maximum extent.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas-filled cabinets, in particular to an automatic leak-repairing gas-filled cabinet. BACKGROUND

[0002] As a key equipment in modern power systems, gas-filled cabinets are widely used in power distribution and control. In order to ensure the normal operation and insulation performance of the gas-filled cabinet, its sealing performance is particularly important. However, in the actual operating environment, the gas-filled cabinet may be affected by various factors, such as equipment aging, external force impact or environmental corrosion, etc., resulting in accidental perforation of the cabinet shell. Once the cabinet shell is perforated, the gas filled in the cabinet, such as sulfur hexafluoride gas or other insulating gas, will leak. Gas leakage not only reduces the insulation performance of the gas-filled cabinet, but also may even cause equipment operation failure, threatening the safe and stable operation of the power system.

[0003] At present, for the problem of gas leakage of the gas-filled cabinet, the existing technology usually adopts the way of installing a pressure sensor inside the gas-filled cabinet for monitoring. When the pressure sensor detects that the gas pressure in the cabinet decreases below the preset threshold, the system will issue an alarm signal to prompt the maintenance personnel that the gas-filled cabinet may have a leak. At this time, the maintenance personnel need to rush to the scene to carry out manual leak detection and repair work. However, this manual on-site maintenance and repair method has obvious shortcomings. First, the maintenance personnel need a certain time from receiving the alarm information to arriving at the scene, and the timeliness of maintenance is poor, which may cause the leakage problem to be unable to be effectively controlled in a short time. Secondly, manual leak detection and repair work often requires a lot of manpower and material resources, and the maintenance cost is high. Furthermore, for some gas-filled cabinets installed in remote or harsh environments, the difficulty and risk of manual maintenance will be further increased.

[0004] In view of the above problems, the existing technology needs to be improved. CONTENT OF THE UTILITY MODEL

[0005] The utility model discloses an automatic leak-repairing gas-filled cabinet, which aims at solving the problem that the cabinet shell cannot be timely and effectively repaired after perforation in the prior art.

[0006] The utility model provides an automatic leak-repairing gas-filled cabinet, which comprises a shell, the shell is provided with a double-layer structure, comprising an inner wall and an outer wall, a closed interlayer inner cavity is formed between the inner wall and the outer wall, a leak-repairing liquid is filled in the interlayer inner cavity, the leak-repairing liquid is a liquid that can solidify when meeting air, a one-way valve is arranged on the inner wall, the one-way valve is connected with a cabinet cavity and the interlayer inner cavity of the gas-filled cabinet, and the one-way valve allows gas to flow from the cabinet cavity to the interlayer inner cavity in one direction.

[0007] Further, the one-way valve is connected to the side of the inner wall away from the outer wall on the basis of the above-mentioned automatic leak-repairing gas-filled cabinet.

[0008] More specifically, on the basis of the above-mentioned automatic leak-repairing air tank, a flexible membrane layer is arranged in the interlayer cavity, the flexible membrane layer separates the inner wall and the outer wall, and the leak-repairing liquid is filled between the flexible membrane layer and the outer wall.

[0009] Preferably, on the basis of the above-mentioned automatic leak-repairing air tank, a partition plate is arranged in the interlayer cavity, the partition plate is connected between the inner wall and the outer wall to separate the interlayer cavity into multiple sub-cavities.

[0010] More preferably, on the basis of the above-mentioned automatic leak-repairing air tank, at least one one-way valve is arranged on the inner wall corresponding to each sub-cavity, and each sub-cavity is filled with the leak-repairing liquid.

[0011] Further, on the basis of the above-mentioned automatic leak-repairing air tank, a flexible membrane layer is arranged in each sub-cavity, and the leak-repairing liquid is filled between the flexible membrane layer and the outer wall.

[0012] Specifically, on the basis of the above-mentioned automatic leak-repairing air tank, the leak-repairing liquid is liquid rubber, polyurethane grouting liquid, water glass, urea-formaldehyde resin or acrylamide.

[0013] More specifically, on the basis of the above-mentioned automatic leak-repairing air tank, the flexible membrane layer is a rubber membrane.

[0014] Specifically, on the basis of the above-mentioned automatic leak-repairing air tank, the one-way valve is a duckbill valve.

[0015] Preferably, on the basis of the above-mentioned automatic leak-repairing air tank, the shell is made of stainless steel material.

[0016] Beneficial effects: The automatic leak-repairing air tank provided by the present application has the advantages that the shell is designed as a double-layer structure, an interlayer cavity is constructed between the inner wall and the outer wall, a leak-repairing liquid that solidifies when exposed to air is filled in the interlayer cavity, and a one-way valve is installed on the inner wall, thereby realizing the automatic leak-repairing function after the air tank shell is perforated. Compared with the manual on-site maintenance and leak-repairing method in the prior art, the technical scheme of the present application has obvious advantages. When the air tank shell is perforated, the gas in the tank cavity will automatically enter the interlayer cavity through the one-way valve under the action of pressure difference, and the leak-repairing liquid in the interlayer cavity will be squeezed to the perforation. The leak-repairing liquid solidifies rapidly after being exposed to air, thereby forming a sealing layer and effectively preventing gas leakage in time. The entire leak-repairing process does not require manual intervention, the response is rapid, the maintenance timeliness is greatly improved, the labor maintenance cost is significantly reduced, and the reliability and safety of the air tank operation are maximized, thereby avoiding equipment failure and safety hazards that may be caused by gas leakage. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The cross-sectional view of the automatic leak-repairing air tank provided by the embodiment of the present application.

[0018] Figure 2 Figure 1 is a first partial structure diagram of the shell.

[0019] Figure 3 Figure 2 is a second partial structure diagram of the shell.

[0020] Figure 4 Figure 3 is a third partial structure diagram of the shell.

[0021] Label explanation: 1, shell; 101, inner wall; 102, outer wall; 103, interlayer cavity; 104, partition; 2, cabinet cavity; 3, one-way valve; 4, leak repair liquid; 5, flexible film layer. DETAILED DESCRIPTION

[0022] The technical solutions in the present application will be described clearly and completely below in conjunction with the drawings in the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0023] It should be noted that: similar labels and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present application, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0024] In the technical field of power equipment, the gas-filled cabinet is widely used due to its excellent insulation performance and reliable operation. However, in actual operation, the gas-filled cabinet faces the risk of accidental perforation of the shell. Once the perforation occurs, the leakage of internal insulation gas will seriously threaten the safe and stable operation of the power system. Although the existing technology has pressure monitoring means, it relies on manual maintenance and repair, and the maintenance efficiency and timeliness need to be improved. In view of this technical bottleneck, the present application proposes a technical scheme of a gas-filled cabinet with automatic leak repair function, aiming to overcome the shortcomings of the prior art and improve the safety and maintenance efficiency of the gas-filled cabinet operation.

[0025] In order to more clearly understand the technical scheme of the utility model, first of all, the key terms involved in the utility model are explained and described. The shell 1 in the utility model is the peripheral structure of the gas-filled cabinet and is mainly used for constituting the sealed space of the gas-filled cabinet. The shell 1 adopts a unique double-wall structure design, which comprises an inner wall 101 and an outer wall 102. The inner wall 101 and the outer wall 102 are not directly attached but jointly enclose a closed interlayer inner cavity 103. The interlayer inner cavity 103 is one of the core components for realizing the automatic leak repairing function of the utility model, and it is pre-filled with a specially prepared leak repairing liquid 4 inside. The leak repairing liquid 4 is a special liquid substance, and its key characteristic is that it can quickly solidify once it comes into contact with air. In addition, a one-way valve 3 is also arranged on the inner wall 101, and the one-way valve 3 is used to connect the cabinet cavity 2 of the gas-filled cabinet and the interlayer inner cavity 103, and the one-way valve 3 is arranged to allow gas to flow from the cabinet cavity 2 to the interlayer inner cavity 103 in one direction only, and the reverse flow is prevented. It can be understood that the gas-filled cabinet of the utility model is used in the environment of a normally operating power system.

[0026] Specifically, and with reference to Figure 1 , Figure 2 The core improvement of the automatic leak repairing gas-filled cabinet proposed by the utility model lies in the structural design of the shell 1. The shell 1 is not a traditional single-layer structure but innovatively adopts a double-layer structure. The double-layer structure is specifically composed of the inner wall 101 and the outer wall 102, and the inner wall 101 and the outer wall 102 cooperate with each other to jointly define a completely closed interlayer inner cavity 103. The interlayer inner cavity 103 is pre-filled with the leak repairing liquid 4 as an independent cavity. The selection of the leak repairing liquid 4 is crucial, and as an example, the leak repairing liquid 4 can adopt liquid rubber or other types of liquid materials that can quickly solidify under specific conditions. The leak repairing liquid 4 is sealed in the interlayer inner cavity 103 and is isolated from the insulating gas inside the cabinet cavity 2 of the gas-filled cabinet. In order to realize the automatic leak repairing function, a one-way valve 3 is also arranged on the inner wall 101 of the gas-filled cabinet. The one-way valve 3 ensures the one-way gas flow between the cabinet cavity 2 and the interlayer inner cavity 103, i.e. allows the gas in the cabinet cavity 2 to enter the interlayer inner cavity 103 under specific conditions, but not vice versa. The type of the one-way valve 3 can have multiple choices, for example, a duckbill valve, a check valve, etc. As an alternative embodiment, the one-way valve 3 can also adopt other forms of one-way conducting elements as long as it can realize one-way gas flow.

[0027] Compared with the prior art, the air-filled cabinet provided by the utility model does not need to deploy complex pressure sensors and alarm systems inside the air-filled cabinet, and does not need to manually perform inspection and maintenance. The utility model realizes the function of automatically repairing the hole when the air-filled cabinet shell is accidentally perforated by means of the ingenious design on the structure. The automatic repairing feature greatly improves the maintenance efficiency, reduces the labor cost, and can maximize the safe and reliable operation of the air-filled cabinet.

[0028] Therefore, when the outer wall 102 of the automatic repairing air-filled cabinet is accidentally perforated, due to the existence of a certain air pressure inside the cabinet cavity 2 of the automatic repairing air-filled cabinet, the gas inside the cabinet cavity 2 will overcome the opening resistance of the one-way valve 3 under the drive of the pressure, and the one-way valve 3 will be opened immediately, so that the gas inside the cabinet cavity 2 can enter the interlayer inner cavity 103. The gas entering the interlayer inner cavity 103 will press the repairing liquid 4 in the interlayer inner cavity 103, and under the action of the pressure, part of the repairing liquid 4 will be squeezed out from the perforation of the outer wall 102. Since the repairing liquid 4 has the characteristic of quickly solidifying when meeting air, once it is squeezed out and contacts with the air outside, it will quickly solidify and harden around the perforation, forming a sealing layer to block the perforation, thereby effectively preventing the further leakage of the insulation gas inside the automatic repairing air-filled cabinet, realizing automatic repairing. It can be understood that after the repairing is completed, the air-filled cabinet can still maintain the normal operating state, ensuring the stable operation of the power system.

[0029] Further, the one-way valve 3 is connected to the side of the inner wall 101 away from the outer wall 102.

[0030] Referring to FIGS. 1-3, Figure 1 and Figure 2 In order to more specifically illustrate the installation position of the one-way valve 3, the one-way valve 3 is installed on the inner wall 101, and its installation position is relatively far away from the outer wall 102. In other words, the one-way valve 3 is not directly installed on the side of the inner wall 101 close to the outer wall 102, but is selected to be installed on the other side of the inner wall 101, i.e. the position closer to the center of the cabinet cavity 2.

[0031] The "side away from the outer wall 102" referred to herein is intended to specify the specific installation orientation of the one-way valve 3 on the inner wall 101. Such installation is not simply to place the one-way valve 3 on the inner wall 101, but to limit the radial position thereof. As an example, the one-way valve 3 can be disposed on the inner surface of the inner wall 101, i.e. the side facing the cabinet cavity 2. In this way, the valve body portion of the one-way valve 3 can occupy as little space as possible in the interlayer inner cavity 103, thereby reserving a larger volume for the interlayer inner cavity 103 to fill more leak repair liquid 4, or providing more freedom for the design of other structures inside the interlayer inner cavity 103. In addition, disposing the one-way valve 3 on the side away from the outer wall 102 is also conducive to the installation and maintenance operation of the one-way valve 3. In actual application, the maintenance personnel can more conveniently access the one-way valve 3 for inspection, replacement or repair, etc. without having to consider the structural interference of the outer wall 102 too much.

[0032] Thus, by disposing the one-way valve 3 on the side of the inner wall 101 away from the outer wall 102, not only can the internal space layout of the automatic leak repair gasholder be optimized and the reliability of the leak repair system be improved, but also the maintenance convenience of the one-way valve 3 is taken into account, making the design of the entire automatic leak repair gasholder more humanized and practical.

[0033] In some optional embodiments, a flexible membrane layer 5 is disposed in the interlayer inner cavity 103, which separates the inner wall 101 and the outer wall 102, and the leak repair liquid 4 is filled between the flexible membrane layer 5 and the outer wall 102.

[0034] In combination with Figure 3 As shown, in order to further optimize the leak repair structure, the utility model adds a flexible membrane layer 5 inside the interlayer inner cavity 103. The flexible membrane layer 5 is disposed between the inner wall 101 and the outer wall 102, and its main function is to separate the interlayer inner cavity 103 into two relatively independent areas. Specifically, the flexible membrane layer 5 is disposed close to the inner wall 101, and the leak repair liquid 4 is filled in the area between the flexible membrane layer 5 and the outer wall 102. Thus, the leak repair liquid 4 is not directly filled in the entire interlayer inner cavity 103, but is limited in the local space surrounded by the flexible membrane layer 5 and the outer wall 102.

[0035] The key of the flexible film layer 5 lies in its "flexibility". The flexible film layer 5 can be made of materials with good flexibility and certain elasticity, such as rubber film, silicone film, flexible plastic film, etc. The flexible film layer 5 mainly plays two roles. First, the flexible film layer 5 can effectively separate the inner wall 101 and the leak repairing liquid 4. This separation can avoid the leak repairing liquid 4 directly contacting the inner wall 101, thereby preventing the leak repairing liquid 4 from polluting or corroding the inner wall 101, especially when the leak repairing liquid 4 has certain corrosiveness, the isolation of the flexible film layer 5 is particularly important. In addition, considering that the gas inside the cabinet cavity 2 can not be completely pure, for example, it can contain a small amount of air or other impurities, once these gases enter the interlayer inner cavity 103 and mix with the leak repairing liquid 4, it can cause the leak repairing liquid 4 to deteriorate, caking and other adverse phenomena, the presence of the flexible film layer 5 can effectively prevent this from happening. Second, the flexible film layer 5 helps to improve the extrusion efficiency of the leak repairing liquid 4. When the gas in the cabinet cavity 2 enters the interlayer inner cavity 103, the gas pressure will act on the flexible film layer 5, and the flexible film layer 5 will deform under the action of the gas pressure and extrude the leak repairing liquid 4, like a deformable "piston", which can more effectively extrude the leak repairing liquid 4 from the perforation, improving the leak repairing effect.

[0036] As can be seen, by introducing the flexible film layer 5 in the interlayer inner cavity 103, not only can the reliability and stability of the leak repairing system be improved, and the adverse effects of the leak repairing liquid 4 on other components of the gassing cabinet can be avoided, but also the utilization efficiency and leak repairing speed of the leak repairing liquid 4 can be improved, making the automatic leak repairing function more perfect and efficient.

[0037] Among them, the interlayer inner cavity 103 can be a fully connected cavity.

[0038] But in a more optimal implementation, the interlayer inner cavity 103 is provided with a partition plate 104, which is connected between the inner wall 101 and the outer wall 102 to separate the interlayer inner cavity 103 into multiple cavities.

[0039] In order to further improve the reliability and redundancy of the automatic leak repairing gassing cabinet, and referring to the above description of the first embodiment, Figure 4As shown, the utility model discloses a plurality of partitions 104 are arranged in the sandwich inner cavity 103. The role of partition 104 is to separate the originally continuous sandwich inner cavity 103 into a plurality of independent compartments. The specific structural form of partition 104 can be diversified, for example, can adopt flat plate, grid or honeycomb structure, as long as it can effectively divide the sandwich inner cavity 103 into a plurality of regions that are not connected to each other. The material of partition 104 can be the same as the inner wall 101 and the outer wall 102, or other materials with sufficient strength and corrosion resistance. The connection mode of partition 104 and the inner wall 101 and the outer wall 102 can adopt welding, bonding, bolt connection or buckle connection and other fixing modes, to ensure that the partition 104 can be firmly installed in the sandwich inner cavity 103, and will not be loose or fall off during the operation of the automatic leak repair gas tank.

[0040] Through the segmentation of partition 104, the sandwich inner cavity 103 is divided into a plurality of independent compartments. Each compartment is an independent leak repair unit, and a certain amount of leak repair liquid 4 can be filled inside. This multi-compartment design makes the leak repair system have stronger local leak repair capability and higher reliability. For example, when the outer wall 102 of the gas tank has a hole at a certain position, only the leak repair liquid 4 in the compartment near the hole will be squeezed out and participate in the leak repair, and the leak repair liquid 4 in other compartments will not be affected, and can still provide leak repair guarantee for subsequent possible holes at other positions. This design effectively avoids the situation that all leak repair liquids 4 are lost due to one hole, and improves the durability and reliability of the leak repair system. In addition, as a structural component connecting the inner wall 101 and the outer wall 102, the partition 104 can also improve the overall structural strength of the shell 1 to some extent, and enhance the anti-deformation ability of the shell 1.

[0041] Therefore, by arranging the partition 104 in the sandwich inner cavity 103, the sandwich inner cavity 103 is divided into a plurality of compartments, so that the automatic leak repair system of the gas tank has more excellent local leak repair capability, higher reliability and longer service life, and also improves the structural strength of the shell 1, further enhances the safety and reliability of the gas tank.

[0042] Further, at least one one-way valve 3 is arranged on the inner wall 101 corresponding to each compartment, and each compartment is filled with the leak repair liquid 4.

[0043] In order to realize more refined and reliable automatic leak repair function, the utility model further puts forward an improved scheme, that is, on the inner wall 101, at least one check valve 3 is arranged for each separate cavity separated by the partition plate 104, and it is ensured that each separate cavity is filled with appropriate amount of leak repair liquid 4. This means that the number of check valves 3 arranged on the inner wall 101 is at least the same as the number of separate cavities separated by the partition plate 104 in the interlayer cavity 103, and each separate cavity has independent supply of leak repair liquid 4.

[0044] Specifically, the check valve 3 can be arranged in various ways. As an example, one or more through holes can be formed in the region of the inner wall 101 corresponding to each separate cavity, and the check valve 3 is installed at the through holes, so that the check valve 3 can communicate the cabinet cavity 2 and the corresponding separate cavity. It can be understood that the type and specification of the check valve 3 can be selected according to actual needs, for example, a micro check valve can be selected to adapt to the size limitation of the separate cavity. In addition, considering that different separate cavities may face different risks of perforation, the number of check valves 3 can also be flexibly configured according to the position and importance of the separate cavities. For example, for the separate cavities corresponding to the regions vulnerable to external force impact, relatively more check valves 3 can be arranged to improve the response speed and amount of leak repair. The amount of leak repair liquid 4 filled in each separate cavity can also be accurately controlled according to the volume of the separate cavity and the expected leak repair demand, so as to maximize the use of leak repair liquid 4 and avoid waste.

[0045] Therefore, by arranging independent check valves 3 and leak repair liquid 4 in each separate cavity, each separate cavity becomes an independent leak repair unit. When the outer wall 102 is perforated in the region corresponding to a separate cavity, only the check valve 3 in the separate cavity will be triggered to open and release the leak repair liquid 4 in the separate cavity for leak repair, while other separate cavities are not affected. This design maximizes the local response capability and reliability of the leak repair system, realizes the effect of "zoning leak repair", avoids the risk of "pulling a hair and moving the whole body", and makes the automatic leak repair function more accurate, efficient and reliable.

[0046] Further, the flexible membrane layer 5 is arranged in each separate cavity, and the leak repair liquid 4 is filled between the flexible membrane layer 5 and the outer wall 102.

[0047] In order to further improve the leak repair performance and reliability of each separate cavity, the utility model also puts forward a scheme of arranging the flexible membrane layer 5 in each separate cavity and filling the leak repair liquid 4 between the flexible membrane layer 5 and the outer wall 102. This means that for each independent separate cavity separated by the partition plate 104, a flexible membrane layer 5 is further arranged inside the separate cavity, and the leak repair liquid 4 is limited to be filled in the region between the flexible membrane layer 5 and the outer wall 102.

[0048] Specifically, for each compartment, the flexible film layer 5 is arranged and functions in a similar way as described above, but its application range is further refined to the interior of each individual compartment. As an example, inside each compartment, the flexible film layer 5 can be arranged close to the inner surface of the compartment inner wall 101, and divide the interior space of the compartment into two sub-regions: one between the flexible film layer 5 and the inner wall 101, and the other between the flexible film layer 5 and the outer wall 102. The leak repair liquid 4 is precisely filled in the sub-region between the flexible film layer 5 and the outer wall 102. The material selection, shape design, and fixation method of the flexible film layer 5 can be described above, and can be adaptively designed according to the specific size and shape of each compartment. For example, the flexible film layer 5 can be cut into a film piece matching the shape of the inner surface of the compartment, and fixed inside the compartment by adhesion, buckling, or other fixation methods.

[0049] Thus, by arranging the flexible film layer 5 inside each compartment, the constraint and extrusion of the flexible film layer 5 on the leak repair liquid 4 are more refined and localized. When a perforation occurs in the region of the outer wall 102 corresponding to a certain compartment, the flexible film layer 5 in the compartment can more effectively extrude the leak repair liquid 4 in the compartment in cooperation with the gas pressure after the one-way valve 3 corresponding to the compartment is opened, improving the extrusion efficiency and leak repair effect of the leak repair liquid 4, and thus further improving the automatic leak repair performance and reliability of the automatic leak repair gasholder as a whole.

[0050] Among them, the leak repair liquid 4 can be but not limited to liquid rubber, polyurethane grouting liquid, water glass, urea-formaldehyde resin or acrylamide.

[0051] In order to achieve rapid and effective automatic leak repair, the material selection of the leak repair liquid 4 is crucial. The utility model proposes that the leak repair liquid 4 can be selected from a variety of specific liquid materials, including but not limited to liquid rubber, polyurethane grouting liquid, water glass, urea-formaldehyde resin or acrylamide, etc. The common feature of these materials is that they all have good fluidity in the liquid state, are easy to fill into the interlayer inner cavity 103, and after contacting with air, can rapidly undergo chemical or physical changes, quickly solidify and harden, forming a solid material, thereby effectively plugging the perforation and preventing gas leakage.

[0052] Specifically, liquid rubber is a kind of rubber material existing in liquid form, which has excellent elasticity and sealing performance, and can form a flexible sealing layer after solidification, adapting to a certain deformation. Polyurethane grouting liquid is a commonly used sealing and reinforcing material, which has high reactivity, adjustable solidification speed, and high strength after solidification. Water glass, also known as sodium silicate, is an inorganic cementing material with good hydraulicity and certain high-temperature resistance, fast solidification speed, and low cost. Urea-formaldehyde resin is a synthetic resin with fast solidification speed, high hardness, and certain adhesive properties. Acrylamide materials are also commonly used as grouting materials, which have controllable solidification speed and form gel-like substances after solidification, with certain elasticity and sealing properties. As an alternative embodiment, the leak repair liquid 4 can also select other types of liquid rapid-setting materials as long as they meet the basic requirements of rapid solidification, good sealing, no corrosion to the air chamber material, etc.

[0053] Therefore, by selecting the above-mentioned liquid rubber, polyurethane grouting liquid, water glass, urea-formaldehyde resin or acrylamide as the leak repair liquid 4, the leak repair liquid 4 can quickly and effectively play a leak repair role after the air chamber shell is perforated, quickly solidify to form a sealing layer, and prevent gas leakage, thereby maximizing the safe and reliable operation of the air chamber.

[0054] In some embodiments, the flexible film layer 5 is a rubber film.

[0055] The rubber film is a thin film made of rubber material, and its main component can be natural rubber or synthetic rubber. The rubber film is preferred as the material of the flexible film layer 5 because of the excellent properties of the rubber material itself. First, the rubber material has outstanding flexibility, which means that the rubber film is easy to deform, such as bending, folding, stretching, etc., and can well adapt to the shape change of the interlayer inner cavity 103, and deform flexibly under the action of gas pressure, effectively transmitting pressure and extruding the leak repair liquid 4. Second, the rubber material has good sealing performance, and the rubber film itself has certain gas barrier properties, which can further enhance the sealing effect of the interlayer inner cavity 103 and prevent the evaporation of the solvent in the leak repair liquid 4 or the penetration of gas. Third, the rubber material also has certain elasticity, which means that the rubber film can partially recover its original shape after being deformed by pressure, and this elastic property helps the rubber film better cooperate with the leak repair liquid 4 to achieve sealing and repair, and improves the durability of the repair structure.

[0056] Specifically, the type and thickness of the rubber film can be selected according to the actual application requirements. For example, different types of rubber films such as natural rubber film, butyl rubber film, silicone rubber film, and ethylene-propylene-diene rubber film can be selected to meet different performance requirements such as temperature resistance, corrosion resistance, and aging resistance. The thickness of the rubber film can be reasonably designed according to the size of the interlayer inner cavity 103, the viscosity of the leak repair liquid 4, and the expected extrusion effect, etc. It can usually be selected in the range of several tens of microns to several millimeters. The rubber film can be fixed in the interlayer inner cavity 103 by bonding, hot pressing, mechanical clamping, etc. to ensure that it does not shift or loosen during the operation of the gas-filled cabinet.

[0057] As can be seen, by limiting the flexible film layer 5 to be a rubber film, the excellent flexibility, sealing and elasticity of the rubber material can be fully utilized, so that the flexible film layer 5 can better play its role of separating the leak repair liquid 4, improving the extrusion efficiency of the leak repair liquid 4 and assisting in sealing the leak repair, thereby further improving the performance and reliability of the automatic leak repair system of the gas-filled cabinet.

[0058] In some embodiments, the one-way valve 3 is a duckbill valve.

[0059] In order to more specifically realize the function of the one-way valve 3 and ensure its reliability and effectiveness during the leak repair process, the utility model proposes to preferably use a duckbill valve as the specific structural form of the one-way valve 3. The duckbill valve is a simple structure and reliable one-way valve, and the valve body is usually made of elastic material (such as rubber or elastic plastic), and the gas outlet of the valve body is designed as a flat duckbill shape. The working principle of the duckbill valve is that when the valve inlet end is subjected to a positive pressure, the duckbill-shaped gas outlet of the valve body will open under the action of the pressure, allowing the gas to pass smoothly; and when the reverse pressure is applied, the duckbill-shaped gas outlet will be automatically closed under the action of the medium pressure and its own elasticity, preventing the medium from flowing in the opposite direction, thereby realizing the one-way conduction function of the gas.

[0060] The duckbill valve is preferred as the structure of the one-way valve 3 in the utility model, mainly because it has the following advantages. First, the duckbill valve structure is extremely simple, usually only one elastic valve body component, without complex mechanical moving parts, so the manufacturing process is simple, the cost is low, and it is not easy to malfunction, with high reliability. Secondly, the opening and closing action of the duckbill valve is sensitive and reliable, and can be quickly and automatically opened and closed according to the size of the pressure difference, with fast response speed, which can timely respond to the change of the air pressure inside the cabinet cavity 2, ensuring the timely start of the leak repair system. Thirdly, the sealing performance of the duckbill valve is good, and under the action of the reverse pressure, the duckbill-shaped gas outlet can be tightly closed to achieve good reverse sealing effect, effectively preventing the gas from flowing back from the interlayer inner cavity 103 to the cabinet cavity 2, ensuring the one-way and effectiveness of the leak repair process. As an alternative embodiment, the one-way valve 3 can also use other types of one-way valve structure, such as check valve, diaphragm valve, etc., as long as it can realize the function of one-way gas flow.

[0061] As can be seen, by limiting the one-way valve 3 to be a duckbill valve, the advantages of simple structure, sensitive and reliable opening and closing, and good sealing performance of the duckbill valve can be fully utilized, so that the one-way valve 3 can better play its role in the automatic leak repair system, ensuring the one-way and effectiveness of the leak repair process, and improving the overall reliability and service life of the leak repair system.

[0062] In some embodiments, the material of the shell 1 is stainless steel material.

[0063] In order to meet the high requirements of the gas-filled cabinet on the strength, sealing performance and durability of the shell 1, the utility model proposes to preferably use metal material to manufacture the shell 1, more specifically, preferably use stainless steel material. Stainless steel is a metal material with excellent comprehensive performance, and its main components are iron, chromium, nickel and other alloy elements. The reason why stainless steel is preferred as the manufacturing material of the shell 1 is that it has the following outstanding advantages. First, stainless steel has very high strength and stiffness, which can withstand the high air pressure inside the gas-filled cabinet, ensuring that the shell 1 will not deform or break during long-term operation, and ensuring the structural safety and operation reliability of the gas-filled cabinet. Secondly, stainless steel has excellent corrosion resistance, which can resist the corrosion of various media such as atmosphere, water, acid, alkali and salt. Even in a humid and corrosive environment, the shell 1 can run stably for a long time, is not easy to rust, and prolongs the service life. Thirdly, the surface of stainless steel is smooth and beautiful, easy to clean and maintain, and meets the cleaning and sanitation requirements of electrical equipment.

[0064] Specifically, there are many kinds of stainless steel, such as austenitic stainless steel, ferritic stainless steel, martensitic stainless steel, etc., and the appropriate stainless steel grade can be selected according to the specific use environment and performance requirements of the gas-filled cabinet. For example, for occasions with high requirements for corrosion resistance, austenitic stainless steel such as 304 or 316 can be selected; for occasions with high strength requirements, martensitic stainless steel with high strength can be selected. The manufacturing process of the shell 1 can adopt various forming processes such as welding, stamping, and stretching to ensure the dimensional accuracy and structural strength of the shell 1. As an alternative embodiment, the material of the shell 1 can also be selected from other types of metal materials, such as carbon steel, aluminum alloy, etc., or a composite of metal materials and other non-metal materials, as long as it can meet the basic requirements of the shell 1 for strength, sealing, corrosion resistance, etc.

[0065] As can be seen, by limiting the material of the shell 1 to stainless steel material, the advantages of high strength, pressure resistance, and corrosion resistance of stainless steel material can be fully utilized, so that the shell 1 can operate stably and reliably for a long time, providing a solid and reliable protective barrier for the gas-filled cabinet, and maximizing the safety and service life of the gas-filled cabinet.

[0066] The above only describes some embodiments of the present application. For those skilled in the art, without departing from the inventive concept of the present application, a number of modifications and improvements can be made, which are all within the scope of protection of the present application.

Claims

1. An automatic leak repairing gas holder comprising a shell (1), characterized in that, the shell (1) is provided in a double-layer structure comprising an inner wall (101) and an outer wall (102); a closed interlayer inner cavity (103) is formed between the inner wall (101) and the outer wall (102); the interlayer inner cavity (103) is filled with a leak repairing liquid (4), the leak repairing liquid (4) being a liquid capable of solidifying when encountering air; a one-way valve (3) is arranged on the inner wall (101), the one-way valve (3) being in communication with a cabinet cavity (2) of the gas holder and the interlayer inner cavity (103) and allowing gas to flow from the cabinet cavity (2) to the interlayer inner cavity (103) in one direction.

2. The self-healing gasholder of claim 1, wherein, The one-way valve (3) is connected to a side of the inner wall (101) away from the outer wall (102).

3. The self-healing gasholder of claim 1, wherein, A flexible membrane layer (5) is arranged in the interlayer inner cavity (103), the flexible membrane layer (5) separating the inner wall (101) and the outer wall (102), and the leak repairing liquid (4) being filled between the flexible membrane layer (5) and the outer wall (102).

4. The self-healing gasholder of claim 3, wherein, A partition plate (104) is arranged in the interlayer inner cavity (103), the partition plate (104) being connected between the inner wall (101) and the outer wall (102) to divide the interlayer inner cavity (103) into multiple compartments.

5. The self-healing gasholder of claim 4, wherein, At least one one-way valve (3) is arranged on the inner wall (101) corresponding to each compartment, and the leak repairing liquid (4) is filled in each compartment.

6. The self-healing gasholder of claim 5, wherein, The flexible membrane layer (5) is arranged in each compartment, and the leak repairing liquid (4) is filled between the flexible membrane layer (5) and the outer wall (102).

7. The self-healing gasholder of claim 1, wherein The leak repairing liquid (4) is liquid rubber, polyurethane grouting liquid, water glass, urea-formaldehyde resin or acrylamide.

8. The self-healing gasholder of claim 3, wherein, The flexible membrane layer (5) is a rubber membrane.

9. The self-healing gasholder of claim 1, wherein, The one-way valve (3) is a duckbill valve.

10. The self-healing gasholder of claim 1, wherein, The shell (1) is made of stainless steel material.

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