A GIS shell structure with a double sealing structure

Abstract

This invention relates to the field of GIS housing sealing technology and discloses a GIS housing structure with a dual sealing structure, including a housing. Two flanges (first flange) are fixedly connected to the top and bottom of the housing. Four flanges (second flange) are provided on the side of each flange (first flange) away from the housing. The four flanges (first flange) contain identical internal parts. The flanges (first flange) and flanges (second flange) are fixed together by a combination assembly. During the descent of flanges (second flange), flanges (second flange) compress sealing rings (first and second flanges). As flanges (second flange) descend, they also cause a beveled ring to descend, which in turn pushes an arc-shaped compression plate to compress sealing rings (second flange). By allowing the deformation of sealing rings (first flange) to diffuse appropriately under pressure, excessive compression near the bolts is alleviated. Furthermore, by actively compressing sealing rings (second flange) away from the bolts, a greater compressive force is applied, ensuring that sealing rings (second flange) fully adhere to flanges (first flange) and flanges (second flange), resulting in uniform compression of sealing rings (first flange) and reducing the probability of leakage.

Description

Technical Field

[0001] This invention relates to the field of GIS housing sealing technology, specifically to a GIS housing structure with a double sealing structure. Background Technology

[0002] GIS electrical components are the core of gas-insulated switchgear, essentially serving as the "metal casing" and "sealed container" of the entire equipment. It is not simply a metal box, but a sophisticated structural system undertaking multiple critical functions. The core functions of the GIS casing include: gas sealing, electrical insulation, mechanical protection, and heat dissipation and thermal management. In GIS casings with a dual-sealing structure, the sealing structure is typically located at the flange connection. The first seal is usually located on the inner side of the flange connection, undertaking the primary sealing task and directly preventing SF6 gas leakage. The second seal is located on the outer side of the flange connection, forming a sealed cavity with the first seal. In the event of failure of the first seal, it provides a second barrier, preventing SF6 gas leakage into the atmosphere or preventing moisture from directly intruding into the main gas chamber.

[0003] When performing double sealing at the flange connection of the GIS shell, the two sealing rings are often squeezed together when the two flanges are connected, so that the sealing rings fit against the two flanges. However, when the flanges are squeezed, the outer sealing ring is closer to the bolt, while the inner sealing ring is farther away from the bolt. As the bolt is tightened, the preload will spread around the bolt and decrease with the increase of radial distance. The sealing ring closer to the bolt will be subjected to greater compressive force, while the sealing ring farther away from the bolt will be subjected to less compressive force. This may result in overpressure on the side of the sealing ring near the bolt and underpressure on the side far away, which may cause uneven compression of the two sealing rings and increase the probability of leakage. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a GIS shell structure with a double sealing structure, including a shell, two flanges I fixedly connected to the top and bottom of the shell, and four flanges II provided on the side of the four flanges I away from the shell.

[0005] The main structure has a fixed assembly on its top and an installation assembly installed on its inner wall. The assembly is used to connect flange one and flange two.

[0006] A sealing mechanism, installed on the inner wall of the assembly, is used to seal the connection between flange one and flange two; and

[0007] A limiting mechanism, located on the inner wall of the assembly, is used to eliminate deformation of the sealing mechanism;

[0008] The four flanges are identical inside, and the four flanges are identical inside. An annular groove is provided on the inner wall of flange one, and a beveled ring is fixedly connected to the inner wall of flange two. Two spring return rods are slidably connected to the inner wall of flange one.

[0009] In this process, flange one and flange two are connected together by a combination component. During the connection process, a sealing mechanism seals the connection between the two to prevent gas leakage. Finally, a limiting mechanism reduces the stress generated by compression, ensuring that the sealing mechanism fits fully with the connection between flange one and flange two.

[0010] Preferably, the main structure includes:

[0011] The assembly is fixedly installed at the bottom and top of the housing to connect flange one and flange two.

[0012] The mounting component is fixedly installed on the outer wall of the mounting component and the inner wall of the flange to install the seal.

[0013] When it is necessary to close the shell, the operator will press flange one and flange two together, and then fix them together using the assembly.

[0014] Preferably, the sealing mechanism includes:

[0015] A sealing component is slidably disposed on the inner wall of flange one, and is used to seal the connection between flange one and flange two;

[0016] The extrusion assembly is slidably disposed on the inner wall of the annular groove to reduce the internal stress generated by the sealing assembly;

[0017] During the fitting process of flange one and flange two, the sealing component is squeezed, causing it to deform and fit against the inner walls of both flanges. This ensures that the compression of the multiple sealing devices within the sealing component is uniform, reducing the probability of leakage. Subsequently, the sealing component is squeezed multiple times by the compression component to eliminate the internal stress generated by the pressure on the sealing component. This effectively prevents the sealing component from generating strong internal stress during the compression process. If the internal stress is too strong and unevenly distributed, tiny gaps will appear in some areas, through which gas inside the shell can permeate and form leakage channels.

[0018] Preferably, the limiting mechanism includes:

[0019] A blocking assembly is slidably disposed on the inner wall of flange one to block the sealing assembly;

[0020] The bonding component is fixedly installed on the inner wall of flange one and is used to bond the connection between flange one and flange two.

[0021] When the extrusion component moves, it pushes the blocking component to move, blocking the sealing component and limiting the pressure state of the sealing component. After the housing is assembled, the inert gas inside the housing will compress the bonding component, allowing the bonding component to bond to the connection between flange one and flange two, reducing the number of maintenance times for flange one and flange two, and preventing flange one and flange two from being difficult to bond tightly after multiple disassemblies, thus improving the sealing effect.

[0022] Preferably, six bolts are slidably connected to the inner wall of flange one, and six nuts are rotatably connected to the top of flange two, with the outer walls of the six bolts threadedly connected to the inner walls of the six nuts.

[0023] When assembling the housing, flange one and flange two are fitted together. Then, by rotating the nut, the nut is connected to the bolt, thus fixing flange one and flange two together.

[0024] Preferably, the mounting assembly includes a sealing groove 1 formed on the inner wall of flange 1 and flange 2, and the inner wall of flange 1 and flange 2 are both provided with sealing groove 2.

[0025] Preferably, the sealing assembly includes a sealing ring 1 slidably connected to the inner wall of the sealing groove 1, a sealing ring 2 slidably connected to the inner wall of the sealing groove 2, and two arc-shaped extrusion plates provided on the outer wall of the sealing ring 2. The side walls of the two arc-shaped extrusion plates are fixedly connected to the side walls of the two spring return rods.

[0026] During the descent of flange two, flange two will compress sealing ring one and sealing ring two, causing them to deform and fit into flange one and flange two respectively. Since the inner diameter of sealing groove one is larger than the outer diameter of sealing ring one, sealing ring one has a larger deformation space. When flange two descends, it will drive the inclined ring to descend. As the inclined ring continues to move, the inclined ring will contact the spring return rod. The inclined surface of the inclined ring will compress the arc surface of the spring return rod, pushing the spring return rod to move towards sealing ring two.

[0027] Simultaneously, the spring return rod accumulates rebound force. When the spring return rod moves, it drives the arc-shaped extrusion plate to move, causing the arc-shaped extrusion plate to extrude the second sealing ring, applying additional extrusion force to the second sealing ring. By increasing the sealing groove of the first sealing ring near the bolt, the deformation of the first sealing ring under pressure is allowed to diffuse appropriately, alleviating excessive extrusion near the bolt. By actively extruding the second sealing ring away from the bolt, a greater extrusion force is applied, allowing the second sealing ring to fully fit with the first and second flanges, making the compression of the first and second sealing rings uniform and reducing the probability of leakage.

[0028] Preferably, the extrusion assembly includes a spring concave-convex ring slidably connected to the inner wall of the annular groove, twenty spring extrusion rods slidably connected to the inner walls of flange one and flange two, arc-shaped blocks fixedly connected to the side walls of the forty spring extrusion rods, and a concave-convex extrusion ring fixedly connected to the top of the spring concave-convex ring.

[0029] During the descent of the inclined ring, it comes into contact with the spring concave-convex ring, which compresses the spring concave-convex ring as it descends, accumulating rebound force. As the spring concave-convex ring descends, its protruding position compresses multiple spring compression rods, causing the spring compression rods to accumulate rebound force and move towards the sealing ring two. This causes the arc-shaped blocks to move, compressing the sealing ring two. As the spring concave-convex ring continues to move, its protruding position separates from the spring compression rods. At this point, the rebound force of the spring compression rods is released, causing the arc-shaped blocks to return to their original position until the protruding position of the spring concave-convex ring compresses the spring compression rods again, causing the arc-shaped blocks to compress the sealing ring two again. This process repeats continuously.

[0030] Preferably, the blocking assembly includes twenty arc-shaped baffles slidably connected to the inner wall of the sealing groove, each of the twenty arc-shaped baffles having a push rod fixedly connected to its side wall, each of the twenty push rods having a slidably connected outer wall to the inner wall of the flange, and each of the twenty push rods having a spring sleeve slidably connected to its outer wall.

[0031] When the spring concave-convex ring descends, it drives the concave-convex extrusion ring to descend as well, pressing the spring extrusion rod located at the top to move. At the same time, as the spring concave-convex ring descends, the protruding part of the spring concave-convex ring also presses multiple spring sleeves, causing them to accumulate rebound force. This causes the multiple spring sleeves to move towards the sealing ring. The spring sleeves push the push rod and the arc-shaped baffle to move, causing the arc-shaped baffle to press the sealing ring one. As the spring concave-convex ring continues to move, the concave part of the spring concave-convex ring will also separate from the spring sleeve, releasing the rebound force of the spring sleeve and allowing the arc-shaped baffle to return to its original position, until the protruding part of the spring concave-convex ring presses the spring sleeve again, causing the arc-shaped baffle to press the sealing ring one again.

[0032] Multiple arc-shaped blocks evenly compress the perimeter of sealing ring two, while multiple arc-shaped baffles evenly compress the perimeter of sealing ring one. This compression is repeated multiple times. Since sealing rings one and two are composed of materials such as rubber, which possess viscoelasticity (combining elasticity and adhesion), the elastic portions of sealing rings one and two can quickly recover after each compression separation, releasing some internal stress. Ultimately, sealing rings one and two adhere to flanges one and two under stable stress, effectively preventing strong internal stress from being generated during compression. The sealing core of sealing rings one and two forms a tightly fitting continuous contact band through elastic deformation. If the internal stress generated by compression is too strong and unevenly distributed, tiny gaps may appear in some areas, allowing gas inside the casing to permeate and form leakage channels.

[0033] Preferably, the fitting assembly includes an annular block fixedly connected to an inner wall of the flange, a rubber ring slidably connected to the inner wall of the annular block, a spring annular plate fixedly connected to the bottom of the rubber ring, and a retaining ring fixedly connected to the inner wall of the annular block.

[0034] When the housing is assembled and in a closed state, inert gas is injected into the housing until high pressure is generated. At this point, the inert gas enters the annular block, squeezing the rubber ring downwards. This causes the spring annular plate to be compressed, accumulating rebound force. Since the contact surface between the annular block and the rubber ring is inclined, the sidewall of the rubber ring is compressed and deformed, allowing the rubber ring to fit against flange one and flange two until it is blocked by the retaining ring. At this point, the rubber ring moves to the connection between flange one and flange two, sealing the connection and extending the closed path of the high-pressure inert gas. This effectively prevents the sealing ring two from being continuously squeezed by the high-pressure inert gas, which would cause it to experience elastic decay due to long-term excessive pressure and easily lead to damage to the sealing ring two. Meanwhile, the sealing ring one would need to be replaced before its service life is reached. This extends the life of the sealing ring two, making it more synchronized with the life of the sealing ring one. It also avoids the difficulty in tightly fitting the flange one and flange two after multiple disassemblies, which would result in a poor sealing effect.

[0035] The present invention has the following beneficial effects:

[0036] (1) When using this invention, when it is necessary to assemble a shell and connect flange one and flange two, flange one and flange two are fixed by assembling the components. During the descent of flange two, flange two will squeeze sealing ring one and sealing ring two. Since the inner diameter of sealing groove one is larger than the outer diameter of sealing ring one, sealing ring one has a larger deformation space. When flange two descends, it will drive the inclined ring to descend. The inclined ring will push the spring return rod to move towards sealing ring two, so that the arc-shaped extrusion plate squeezes sealing ring two. By allowing the deformation of sealing ring one under pressure to diffuse appropriately, the excessive extrusion near the bolt is relieved. By actively extruding sealing ring two away from the bolt, a greater extrusion force is applied, so that sealing ring two is fully fitted with flange one and flange two, so that the compression of sealing ring one and sealing ring two is uniform, and the probability of leakage is reduced.

[0037] (2) When the inclined ring descends, the inclined ring will also contact the spring concave and convex rings, which will squeeze the spring concave and convex rings to descend. When the spring concave and convex rings descend, the protruding position of the spring concave and convex rings will squeeze multiple spring extrusion rods. Through the extrusion assembly, multiple arc-shaped blocks will squeeze the sealing ring two. At the same time, when the spring concave and convex rings descend, the protruding position of the spring concave and convex rings will also squeeze multiple spring sleeves. Through the blocking assembly, multiple arc-shaped baffles will squeeze the sealing ring one. Multiple arc-shaped blocks will evenly squeeze the circumference of the sealing ring two. Multiple arc-shaped baffles will evenly squeeze the circumference of the sealing ring one. At the same time, multiple extrusions will be performed. After each extrusion separation, the elastic parts of the sealing ring one and the sealing ring two can quickly recover and release some internal stress, effectively preventing the sealing ring one and the sealing ring two from generating strong internal stress during the extrusion process. If the internal stress is too strong and unevenly distributed, small gaps will appear in some areas. Gas inside the shell can penetrate through these gaps and form leakage channels.

[0038] (3) When the sealing ring 1 is squeezed by multiple arc-shaped baffles, the sealing ring 1 will deform and also squeeze the arc-shaped baffles to move in the opposite direction, so that the arc-shaped baffles apply a reverse thrust to the sealing ring 1. When the flange 2 squeezes the sealing ring 1, the sealing ring 1 is compressed vertically, which effectively prevents the inner diameter of the sealing groove 1 from being larger than the outer diameter of the sealing ring 1. When the sealing ring 1 is squeezed, some areas will be deflected, affecting the tight fit with the flange 2.

[0039] (4) When the housing is assembled and in a closed state, the present invention will inject inert gas into the housing until the inert gas in the housing generates high pressure. At this time, the inert gas will enter the annular block and squeeze the rubber ring down. Through the bonding component, the rubber ring will move to the connection between flange one and flange two to seal the connection, extend the closed path of the high pressure inert gas, and effectively prevent the sealing ring two from being continuously squeezed by the high pressure inert gas, which will cause it to withstand excessive pressure for a long time and experience elastic decay, which will easily cause the sealing ring two to be damaged. Meanwhile, the sealing ring one needs to be replaced before its service life is reached, thereby extending the service life of the sealing ring two and making it more synchronized with the service life of the sealing ring one. This avoids the difficulty in tightly fitting the two after multiple disassemblies of flange one and flange two, which would worsen the sealing effect. Attached Figure Description

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 This is a cross-sectional view of the overall structure of the present invention;

[0042] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0043] Figure 3 This is a schematic cross-sectional view of the casing of the present invention;

[0044] Figure 4 This is a cross-sectional schematic diagram of the flange of the present invention;

[0045] Figure 5 This is a schematic diagram of two cross-sections of the flange of the present invention;

[0046] Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle;

[0047] Figure 7 This is a schematic diagram of the working process of flange one and flange two of the present invention;

[0048] Figure 8 For the present invention Figure 7 Enlarged view of point B in the middle;

[0049] Figure 9 This is an exploded view of part of the sealing mechanism of the present invention;

[0050] Figure 10 This is an exploded cross-sectional view of a portion of the sealing mechanism of the present invention;

[0051] Figure 11 This is a top view of the spring concave-convex ring of the present invention.

[0052] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0053] In the diagram: 1. Main structure; 11. Assembly assembly; 12. Mounting assembly; 111. Housing; 112. Flange 1; 113. Flange 2; 114. Nut; 115. Bolt; 121. Sealing groove 1; 122. Sealing groove 2; 123. Annular groove; 2. Sealing mechanism; 21. Sealing assembly; 22. Extrusion assembly; 211. Sealing ring 1; 212. Sealing ring 2; 213. Inclined ring; 214. Spring return rod; 215. Arc-shaped extrusion plate; 221. Spring concave-convex ring; 222. Spring extrusion rod; 223. Arc-shaped block; 224. Concave-convex extrusion ring; 3. Restriction mechanism; 31. Blocking assembly; 32. Fitting assembly; 311. Spring sleeve; 312. Push rod; 313. Arc-shaped baffle; 321. Annular block; 322. Rubber ring; 323. Spring annular plate; 324. Retaining ring. Detailed Implementation

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0055] Example 1, please refer to Figure 1-Figure 5 The present invention is a GIS shell structure with a double sealing structure, including a shell 111, two flanges 112 are fixedly connected to the top and bottom of the shell 111, and four flanges 113 are provided on the side of the four flanges 112 away from the shell 111.

[0056] The main body 1 has a combination component 11 fixedly installed on its top and an installation component 12 installed on its inner wall. The combination component 11 is used to connect flange one 112 and flange two 113.

[0057] Sealing mechanism 2, installed on the inner wall of assembly 11, is used to seal the connection between flange 112 and flange 113; and

[0058] The limiting mechanism 3 is located on the inner wall of the assembly 11 and is used to eliminate the deformation of the sealing mechanism 2;

[0059] The four flanges 112 contain the same internal parts, and the four flanges 113 contain the same internal parts. An annular groove 123 is provided on the inner wall of flange 112. An inclined ring 213 is fixedly connected to the inner wall of flange 113. Two spring return rods 214 are slidably connected to the inner wall of flange 112.

[0060] In this process, flange 112 and flange 213 are connected together by assembly component 11. During the connection process, sealing mechanism 2 seals the connection between the two to prevent gas leakage at the connection point. Finally, limiting mechanism 3 reduces the stress generated by compression, so that sealing mechanism 2 and the connection between flange 112 and flange 213 are fully fitted.

[0061] Main body 1 includes:

[0062] The bottom of the assembly 11 is fixedly disposed to the top of the housing 111, and is used to connect the first flange 112 and the second flange 113.

[0063] Mounting component 12 is fixedly installed on the outer wall of mounting component 12 and on the inner wall of flange 112 for installing seals;

[0064] When it is necessary to close the housing 111, the operator will attach flange 112 and flange 213 together, and then fix them together by the assembly 11.

[0065] Sealing mechanism 2 includes:

[0066] The sealing component 21 is slidably disposed on the inner wall of flange 112 and is used to seal the connection between flange 112 and flange 213.

[0067] The extrusion assembly 22 is slidably disposed on the inner wall of the annular groove 123 to reduce the internal stress generated by the sealing assembly 21.

[0068] During the fitting process of flange 112 and flange 213, the sealing component 21 is squeezed, causing the sealing component 21 to deform and fit against the inner walls of both flanges. This ensures that the compression of the multiple sealing devices in the sealing component 21 is uniform, reducing the probability of leakage. Subsequently, the sealing component 21 is squeezed multiple times by the compression component 22 to eliminate the internal stress generated by the compression of the sealing component 21. This effectively prevents the sealing component 21 from generating strong internal stress during the compression process. If the internal stress is too strong and unevenly distributed, small gaps will appear in some areas, and the gas inside the shell 111 can penetrate through these gaps, forming a leakage channel.

[0069] Restricted agency 3 includes:

[0070] The blocking assembly 31 is slidably disposed on the inner wall of the flange 112 and is used to block the sealing assembly 21.

[0071] Fitting component 32 is fixedly installed on the inner wall of flange 112 and is used to fit the connection between flange 112 and flange 213.

[0072] When the extrusion component 22 moves, it pushes the blocking component 31 to move, blocking the sealing component 21 and limiting the pressure state of the sealing component 21. After the housing 111 is assembled, the inert gas inside the housing 111 will extrude the bonding component 32, so that the bonding component 32 is bonded to the connection between flange 112 and flange 213, reducing the number of maintenance times for flange 112 and flange 213, and avoiding the difficulty of tightly bonding the two after multiple disassemblies of flange 112 and flange 213, which would result in a poor sealing effect.

[0073] Example 2, please refer to Figures 1-11 The present invention is a GIS shell structure with a double sealing structure. Based on Example 1, six bolts 115 are slidably connected to the inner wall of flange 112, and six nuts 114 are rotatably connected to the top of flange 2 113. The outer walls of the six bolts 115 are threaded to the inner walls of the six nuts 114.

[0074] When the housing 111 needs to be assembled, flange 112 and flange 2 113 are fitted together. Then, by rotating nut 114, nut 114 is connected to bolt 115, and flange 112 and flange 2 113 are fixed together.

[0075] The mounting assembly 12 includes a sealing groove 121 formed on the inner wall of flange 112 and flange 213, and a sealing groove 222 formed on the inner wall of flange 112 and flange 213.

[0076] The sealing assembly 21 includes a sealing ring 211 that is slidably connected to the inner wall of the sealing groove 121, a sealing ring 212 that is slidably connected to the inner wall of the sealing groove 122, and two arc-shaped extrusion plates 215 that are provided on the outer wall of the sealing ring 212. The side walls of the two arc-shaped extrusion plates 215 are fixedly connected to the side walls of the two spring return rods 214.

[0077] During the descent of flange 213, flange 213 will compress sealing ring 1211 and sealing ring 212, causing them to deform and fit into flange 112 and flange 213 respectively. Since the inner diameter of sealing groove 121 is larger than the outer diameter of sealing ring 121, sealing ring 121 has a larger deformation space. When flange 213 descends, it will drive the inclined ring 213 to descend. As the inclined ring 213 continues to move, the inclined ring 213 will contact the spring return rod 214. The inclined surface of the inclined ring 213 will compress the arc surface of the spring return rod 214, pushing the spring return rod 214 towards sealing ring 212.

[0078] Simultaneously, the spring return rod 214 accumulates rebound force. When the spring return rod 214 moves, it drives the arc-shaped extrusion plate 215 to move, causing the arc-shaped extrusion plate 215 to extrude the sealing ring 212 and apply additional extrusion force to the sealing ring 212. By increasing the sealing groove 121 of the sealing ring 211 near the bolt 115, the deformation of the sealing ring 211 under pressure is allowed to diffuse appropriately, alleviating excessive extrusion near the bolt 115. By actively extruding the sealing ring 212 away from the bolt 115, a greater extrusion force is applied, allowing the sealing ring 212 to fully fit with the flange 112 and flange 213, making the compression of the sealing ring 211 and the sealing ring 212 uniform and reducing the probability of leakage.

[0079] The extrusion assembly 22 includes a spring concave-convex ring 221 slidably connected to the inner wall of the annular groove 123, twenty spring extrusion rods 222 slidably connected to the inner walls of flange one 112 and flange two 113, arc-shaped blocks 223 fixedly connected to the side walls of the forty spring extrusion rods 222, and a concave-convex extrusion ring 224 fixedly connected to the top of the spring concave-convex ring 221.

[0080] During the descent of the inclined ring 213, it also contacts the spring concave-convex ring 221, compressing it and causing it to descend, accumulating rebound force. As the spring concave-convex ring 221 descends, its protruding position compresses multiple spring compression rods 222, causing them to accumulate rebound force. This causes the spring compression rods 222 to move towards the sealing ring 212, moving the arc-shaped block 223 and causing it to compress the sealing ring 212. As the spring concave-convex ring 221 continues to move, its protruding position separates from the spring compression rods 222. At this point, the rebound force of the spring compression rods 222 is released, causing the arc-shaped block 223 to return to its original position until the protruding position of the spring concave-convex ring 221 compresses the spring compression rods 222 again, causing the arc-shaped block 223 to compress the sealing ring 212 again. This process repeats continuously.

[0081] The blocking assembly 31 includes twenty arc-shaped baffles 313 that are slidably connected to the inner wall of the sealing groove 121. Each of the twenty arc-shaped baffles 313 has a push rod 312 fixedly connected to its side wall. Each of the twenty push rods 312 has a spring sleeve 311 slidably connected to its outer wall and the inner wall of the flange 112.

[0082] When the spring concave-convex ring 221 descends, it drives the concave-convex compression ring 224 to descend, compressing the spring compression rod 222 located at the top to move. At the same time, when the spring concave-convex ring 221 descends, the protruding position of the spring concave-convex ring 221 will also compress multiple spring sleeves 311, causing them to accumulate rebound force, and causing multiple spring sleeves 311 to move towards the sealing ring 211. The spring sleeves 311 will push the push rod 312 and the arc-shaped baffle 313 to move, causing the arc-shaped baffle 313 to compress the sealing ring 211. As the spring concave-convex ring 221 continues to move, the concave position of the spring concave-convex ring 221 will also separate from the spring sleeve 311, releasing the rebound force of the spring sleeve 311, allowing the arc-shaped baffle 313 to return to its original position, until the protruding position of the spring concave-convex ring 221 compresses the spring sleeve 311 again, causing the arc-shaped baffle 313 to compress the sealing ring 211 again.

[0083] Multiple arc-shaped blocks 223 uniformly compress the periphery of sealing ring 212, while multiple arc-shaped baffles 313 uniformly compress the periphery of sealing ring 211. Simultaneously, multiple compressions are performed. Since sealing rings 211 and 212 are composed of materials such as rubber, which possess viscoelasticity and both elasticity and adhesion, the elastic portions of sealing rings 211 and 212 can quickly recover after each compression separation, releasing some internal stress. Ultimately, sealing rings 211 and 212 adhere to flanges 112 and 113 under stable stress, effectively preventing strong internal stress from being generated during compression. The sealing core of sealing rings 211 and 212 forms a tightly fitting continuous contact band through elastic deformation. If the internal stress generated by compression is too strong and unevenly distributed, small gaps may appear in some areas, allowing gas inside the shell 111 to permeate through these gaps, forming leakage channels.

[0084] The bonding assembly 32 includes an annular block 321 fixedly connected to the inner wall of the flange 112, a rubber ring 322 slidably connected to the inner wall of the annular block 321, a spring annular plate 323 fixedly connected to the bottom of the rubber ring 322, and a retaining ring 324 fixedly connected to the inner wall of the annular block 321.

[0085] When the housing 111 is assembled and in a closed state, inert gas is injected into the housing 111 until high pressure is generated. At this time, the inert gas enters the annular block 321, squeezing the rubber ring 322 downward, causing the spring annular plate 323 to be compressed and accumulating rebound force. Since the contact surface between the annular block 321 and the rubber ring 322 is inclined, the sidewall of the rubber ring 322 will be compressed and deformed, causing the rubber ring 322 to fit against the flange 112 and flange 213 until the rubber ring 322 is blocked by the retaining ring 324. At this time, the rubber ring 322... The rubber ring 322 will move to the connection between flange 112 and flange 213 to seal the connection, extend the closed path of the high-pressure inert gas, and effectively prevent the sealing ring 212 from being continuously squeezed by the high-pressure inert gas, which would cause it to experience elastic decay due to long-term excessive pressure and easily damage the sealing ring 212. Meanwhile, the sealing ring 111 would need to be replaced before its service life is reached. This extends the service life of the sealing ring 212 and makes it more synchronized with the service life of the sealing ring 111. It also avoids the difficulty in tightly fitting the flange 112 and flange 213 after repeated disassembly, which would lead to a deterioration in the sealing effect.

[0086] The number of the above components is not limited. Those skilled in the art can set it freely according to actual needs, as long as the above components are installed at the corresponding connection positions.

[0087] A specific application of this embodiment is as follows: When using this invention, if it is necessary to assemble the housing 111 and connect flange one 112 and flange two 113, seal ring one 211 is placed into the sealing groove one 121 in flange one 112, and seal ring two 212 is placed into the sealing groove two 122 in flange one 112. The operator fits flange two 113 with flange one 112, so that seal ring one 211 enters the sealing groove one 121 of flange two 113, and seal ring two 212 enters the sealing groove two 122 of flange two 113. Then, the nut 114 is rotated to connect with bolt 115 to fix flange one 112 and flange two 113. Figure 7 As shown;

[0088] During the descent of flange 213, flange 213 will compress sealing ring 1211 and sealing ring 212, causing them to deform and fit into flange 112 and flange 213 respectively. Since the inner diameter of sealing groove 121 is larger than the outer diameter of sealing ring 121, sealing ring 121 has a larger deformation space. When flange 213 descends, it will drive the inclined ring 213 to descend. As the inclined ring 213 continues to move, the inclined ring 213 will contact the spring return rod 214. The inclined surface of the inclined ring 213 will compress the arc surface of the spring return rod 214, pushing the spring return rod 214 towards sealing ring 212.

[0089] At the same time, the spring return rod 214 accumulates rebound force. When the spring return rod 214 moves, it will drive the arc-shaped extrusion plate 215 to move, so that the arc-shaped extrusion plate 215 extrudes the sealing ring 212 and applies additional extrusion force to the sealing ring 212. By increasing the sealing groove 121 of the sealing ring 211 near the bolt 115, the deformation of the sealing ring 211 under pressure is allowed to diffuse appropriately, which alleviates the excessive extrusion near the bolt 115. By actively extruding the sealing ring 212 away from the bolt 115, a greater extrusion force is applied, so that the sealing ring 212 fully fits with the flange 112 and the flange 213, making the compression of the sealing ring 211 and the sealing ring 212 uniform and reducing the probability of leakage.

[0090] Secondly, when the inclined ring 213 descends, it will also come into contact with the spring concave-convex ring 221, which will compress the spring concave-convex ring 221 to descend, allowing it to accumulate rebound force. When the spring concave-convex ring 221 descends, the protruding position of the spring concave-convex ring 221 will compress multiple spring compression rods 222, allowing the spring compression rods 222 to accumulate rebound force, causing the spring compression rods 222 to move towards the sealing ring 212, driving the arc block 223 to move, causing multiple arc blocks 223 to compress the sealing ring 212. As the spring concave-convex ring 221 continues to move, the protruding position of the spring concave-convex ring 221 will separate from the spring compression rod 222. At this time, the rebound force of the spring compression rod 222 will be released, driving the arc block 223 back to its original position, until the protruding position of the spring concave-convex ring 221 compresses the spring compression rod 222 again, causing the arc block 223 to compress the sealing ring 212 again, and so on.

[0091] When the spring concave-convex ring 221 descends, it drives the concave-convex compression ring 224 to descend, compressing the spring compression rod 222 located at the top to move. At the same time, when the spring concave-convex ring 221 descends, the protruding position of the spring concave-convex ring 221 will also compress multiple spring sleeves 311, causing them to accumulate rebound force, and causing multiple spring sleeves 311 to move towards the sealing ring 211. The spring sleeves 311 will push the push rod 312 and the arc-shaped baffle 313 to move, causing the arc-shaped baffle 313 to compress the sealing ring 211. As the spring concave-convex ring 221 continues to move, the concave position of the spring concave-convex ring 221 will also separate from the spring sleeve 311, releasing the rebound force of the spring sleeve 311, allowing the arc-shaped baffle 313 to return to its original position, until the protruding position of the spring concave-convex ring 221 compresses the spring sleeve 311 again, causing the arc-shaped baffle 313 to compress the sealing ring 211 again.

[0092] Multiple arc-shaped blocks 223 uniformly compress the periphery of sealing ring 212, and multiple arc-shaped baffles 313 uniformly compress the periphery of sealing ring 211. Simultaneously, multiple compressions are performed. Since sealing ring 211 and sealing ring 212 are composed of materials such as rubber, which have viscoelasticity and combine elasticity and viscosity, the elastic parts of sealing ring 211 and sealing ring 212 can quickly recover after each compression and separation, releasing some internal stress. Ultimately, sealing ring 211 and sealing ring 212 are in a stable stress state and fit with flange 112 and flange 213, effectively preventing sealing ring 211 and sealing ring 212 from generating strong internal stress during the compression process. The sealing core of sealing ring 211 and sealing ring 212 forms a tight and continuous contact band through elastic deformation. If the internal stress generated by compression is too strong and unevenly distributed, small gaps will appear in some areas, and gas inside the shell 111 can permeate through these gaps, forming leakage channels.

[0093] Secondly, when multiple arc-shaped baffles 313 compress the sealing ring 211, the deformation of the sealing ring 211 will also cause the arc-shaped baffles 313 to move in the opposite direction, so that the arc-shaped baffles 313 apply a reverse thrust to the sealing ring 211. When the flange 213 compresses the sealing ring 211, the sealing ring 211 is compressed vertically, which effectively prevents the inner diameter of the sealing groove 121 from being larger than the outer diameter of the sealing ring 211. When the sealing ring 211 is compressed, some areas will be deflected, affecting the tight fit with the flange 213.

[0094] Secondly, when the housing 111 is assembled and in a closed state, inert gas is injected into the housing 111 until high pressure is generated. At this time, the inert gas enters the annular block 321, squeezing the rubber ring 322 downward, causing the spring annular plate 323 to be compressed and accumulating rebound force. Since the contact surface between the annular block 321 and the rubber ring 322 is inclined, the sidewall of the rubber ring 322 will be compressed and deformed, causing the rubber ring 322 to fit against the flange 112 and flange 213 until the rubber ring 322 is blocked by the retaining ring 324. At this time, the rubber ring 322... The rubber ring 322 will move to the connection between flange 112 and flange 213 to seal the connection, extend the closed path of the high-pressure inert gas, and effectively prevent the sealing ring 212 from being continuously squeezed by the high-pressure inert gas, which would cause it to experience elastic decay due to long-term excessive pressure and easily damage the sealing ring 212. Meanwhile, the sealing ring 111 would need to be replaced before its service life is reached. This extends the service life of the sealing ring 212 and makes it more synchronized with the service life of the sealing ring 111. It also avoids the difficulty in tightly fitting the flange 112 and flange 213 after repeated disassembly, which would lead to a deterioration in the sealing effect.

[0095] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A GIS shell structure with a double sealing structure, comprising a shell (111), wherein two flanges (112) are fixedly connected to the top and bottom of the shell (111), and four flanges (113) are provided on the side of each flange (112) away from the shell (111), characterized in that, Also includes: The main body (1) has a combination component (11) fixedly installed on its top and an installation component (12) installed on its inner wall. The combination component (11) is used to connect flange one (112) and flange two (113). A sealing mechanism (2), which is installed on the inner wall of the assembly (11), is used to seal the connection between flange one (112) and flange two (113); and A limiting mechanism (3) is located on the inner wall of the assembly (11) to eliminate deformation of the sealing mechanism (2); The four flanges (112) contain the same internal parts, and the four flanges (113) contain the same internal parts. An annular groove (123) is provided on the inner wall of the flange (112). A beveled ring (213) is fixedly connected to the inner wall of the flange (113). Two spring return rods (214) are slidably connected to the inner wall of the flange (112). Among them, flange one (112) and flange two (113) are connected together by the combination component (11). During the connection process, the connection between the two is sealed by the sealing mechanism (2). Finally, the stress generated by extrusion is reduced by the limiting mechanism (3). The installation assembly (12) includes a sealing groove (121) on the inner wall of flange one (112) and flange two (113), and a sealing groove (122) is provided on the inner wall of flange one (112) and flange two (113). The sealing mechanism (2) includes: A sealing component (21) is slidably disposed on the inner wall of flange one (112) for sealing the connection between flange one (112) and flange two (113); The extrusion assembly (22) is slidably disposed on the inner wall of the annular groove (123) to reduce the internal stress generated by the sealing assembly (21); During the bonding process of flange one (112) and flange two (113), the sealing component (21) will be squeezed, causing the sealing component (21) to deform and bond with the inner walls of both. Then, the sealing component (21) is squeezed multiple times by the squeezing component (22) to eliminate the internal stress generated by the pressure on the sealing component (21). The sealing assembly (21) includes a sealing ring 1 (211) slidably connected to the inner wall of the sealing groove 1 (121), a sealing ring 2 (212) slidably connected to the inner wall of the sealing groove 2 (122), and two arc-shaped extrusion plates (215) provided on the outer wall of the sealing ring 2 (212). The side walls of the two arc-shaped extrusion plates (215) are fixedly connected to the side walls of the two spring return rods (214). During the process of flange 2 (113) descending and fitting with flange 1 (112), flange 2 (113) will squeeze sealing ring 1 (211) and sealing ring 2 (212), causing them to deform and fit sealing groove 1 (121) and sealing groove 2 (122). At the same time, the inclined ring (213) will squeeze the spring return rod (214) and the arc-shaped extrusion plate (215) to move, causing the arc-shaped extrusion plate (215) to squeeze sealing ring 2 (212). The extrusion assembly (22) includes a spring-loaded ring (221) that is slidably connected to the inner wall of the annular groove (123), and twenty spring-loaded extrusion rods (222) are slidably connected to the inner walls of the first flange (112) and the second flange (113). Arc-shaped blocks (223) are fixedly connected to the side walls of the forty spring compression rods (222), and concave-convex compression rings (224) are fixedly connected to the top of the spring concave-convex rings (221). During the descent of the inclined ring (213), the inclined ring (213) will also push the spring concave-convex ring (221) and the concave-convex extrusion ring (224) to descend, so that the arc block (223) will extrude the sealing ring two (212) multiple times, thereby eliminating the stress of the sealing ring two (212).

2. The GIS shell structure with a double sealing structure according to claim 1, characterized in that: The bottom of the assembly (11) is fixedly disposed with the top of the housing (111) for connecting flange one (112) and flange two (113); The outer wall of the mounting assembly (12) is fixedly disposed to the inner wall of the flange (112) for installing the sealing element; When it is necessary to close the shell (111), the operator will attach flange one (112) and flange two (113) together, and then fix them together by the assembly (11).

3. A GIS shell structure with a double sealing structure according to claim 2, characterized in that: The limiting mechanism (3) includes: A blocking assembly (31) is slidably disposed on the inner wall of flange one (112) to block the closing assembly (21). The bonding component (32) is fixedly disposed on the inner wall of flange one (112) and is used to bond the connection between flange one (112) and flange two (113); When the extrusion component (22) moves, it will push the blocking component (31) to move, blocking the sealing component (21) and limiting the pressure state of the sealing component (21). When the housing (111) is assembled, the inert gas inside the housing (111) will extrude the bonding component (32), so that the bonding component (32) is bonded to the connection between flange one (112) and flange two (113).

4. A GIS shell structure with a double sealing structure according to claim 3, characterized in that: The inner wall of the first flange (112) is slidably connected with six bolts (115), and the top of the second flange (113) is rotatably connected with six nuts (114). The outer walls of the six bolts (115) are threadedly connected to the inner walls of the six nuts (114). When it is necessary to assemble the housing (111), flange one (112) and flange two (113) are fitted together. Then, by rotating the nut (114), the nut (114) is connected to the bolt (115), and flange one (112) and flange two (113) are fixed together.

5. A GIS shell structure with a double sealing structure according to claim 4, characterized in that: The blocking assembly (31) includes twenty arc-shaped baffles (313) slidably connected to the inner wall of the sealing groove (121), and push rods (312) are fixedly connected to the side walls of the twenty arc-shaped baffles (313). The outer walls of all twenty push rods (312) are slidably connected to the inner wall of flange one (112), and spring sleeves (311) are slidably connected to the outer walls of all twenty push rods (312). When the spring concave-convex ring (221) descends, it will squeeze the spring sleeve (311) to move, push the push rod (312) to move, and drive the arc-shaped baffle (313) to move, so that the arc-shaped baffle (313) squeezes the sealing ring (211) multiple times to eliminate the stress on the sealing ring (211).

6. A GIS shell structure with a double sealing structure according to claim 5, characterized in that: The bonding assembly (32) includes an annular block (321) fixedly connected to the inner wall of flange one (112), a rubber ring (322) slidably connected to the inner wall of the annular block (321), a spring annular plate (323) fixedly connected to the bottom of the rubber ring (322), and a retaining ring (324) fixedly connected to the inner wall of the annular block (321). When the housing (111) is assembled, high-pressure inert gas is injected into the housing (111). The inert gas will squeeze the rubber ring (322), causing the rubber ring (322) to descend and fit against the connection between flange one (112) and flange two (113).

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