GIS shell structure with double-sealing structure

Abstract

The invention relates to the technical field of GIS shell sealing, and discloses a GIS shell structure with a double-sealing structure, the GIS shell structure comprises a shell, the top and the bottom of the shell are each fixedly connected with two first flange plates, the sides, away from the shell, of the four first flange plates are each provided with a second flange plate, and the four first flange plates internally comprise the same parts; a first flange plate and a second flange plate are fixed through a combined assembly, in the descending process of the second flange plate, the second flange plate can extrude a first sealing ring and a second sealing ring, when the second flange plate descends, a slope ring can be driven to descend, and the slope ring can push an arc-shaped extrusion plate to extrude the second sealing ring; and by actively extruding the second sealing ring far away from the bolt, larger extrusion force is applied, so that the second sealing ring is fully attached to the first flange plate and the second flange plate, the compression amount of the first sealing ring and the second sealing ring is uniform, and the leakage probability is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of GIS shell sealing, and in particular to a GIS shell structure with a double sealing structure. Background Art

[0002] GIS electrical is the core component of gas-insulated switchgear, equivalent to the "metal shell" and "sealed container" of the entire equipment. It is not a simple metal box, but a sophisticated structural system that performs multiple critical functions. The core functions of the GIS shell include: gas sealing, electrical insulation, mechanical protection, and heat dissipation and thermal management. Among them, the GIS shell with a double-sealed structure usually has a sealing structure located at the flange connection. The first seal is usually located on the inner side of the flange connection and undertakes the main sealing task, directly preventing SF6 gas from leaking outward. The second seal is located on the outer side of the flange connection, forming a sealed cavity between it and the first seal. When the first seal fails, it provides a second barrier to prevent SF6 gas from leaking into the atmosphere or prevent moisture from directly invading the main gas chamber.

[0003] Among them, when the flange connection position of the GIS shell is double-sealed, it is often necessary to squeeze the two sealing rings when the two flanges are connected so that the sealing rings fit the two flanges. However, when the flanges are squeezed, the outer sealing ring is closer to the bolts, and the inner sealing ring is farther away from the bolts. When the bolts are tightened, the preload force will diffuse around the bolts and decay with increasing radial distance. The sealing ring close to the bolts will be subjected to a greater extrusion force, and the sealing ring far away from the bolts will be subjected to a smaller extrusion force, which may cause overpressure on the side of the sealing ring near the bolts and underpressure on the far side, 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, comprising a shell, wherein the top and bottom of the shell are fixedly connected to two flanges 1, and each of the four flanges 1 is provided with a flange 2 on a side away from the shell; The main body mechanism has a combination component fixedly provided on the top of the main body mechanism, and a mounting component is installed on the inner wall of the main body mechanism, and the combination component is used to connect the flange plate 1 with the flange plate 2; A sealing mechanism, which is installed on the inner wall of the assembly and is used to seal the connection between the first flange and the second flange; and A limiting mechanism, located at the inner wall of the assembly, for eliminating deformation of the sealing mechanism; The four flanges 1 contain the same parts, and the four flanges 2 contain the same parts. An annular groove is provided on the inner wall of flange 1, a bevel ring is fixedly connected to the inner wall of flange 2, and two spring return rods are slidably connected to the inner wall of flange 1. Among them, flange one and flange two are connected together through a combination component. During the connection process, the connection between the two is sealed by a sealing mechanism to avoid gas leakage at the connection position. Finally, the stress generated by extrusion is reduced by a limiting mechanism, so that the sealing mechanism is fully fitted with the connection between flange one and flange two.

[0005] Preferably, the main body includes: A combination assembly, the bottom of which is fixedly arranged on the top of the shell, and is used to connect the flange plate 1 with the flange plate 2; An installation component is fixedly provided at the outer wall of the installation component and the inner wall of the flange plate for installing a seal; When the shell needs to be sealed, the operator fits the flange 1 and the flange 2 together, and then fixes the two together through a combined assembly.

[0006] Preferably, the sealing mechanism comprises: A closing component is slidably arranged on the inner wall of the flange plate 1 and is used to seal the connection between the flange plate 1 and the flange plate 2; An extrusion assembly is slidably disposed on the inner wall of the annular groove to reduce the internal stress generated by the closing assembly; Among them, during the fitting process of flange one and flange two, the closing component will be squeezed to make the closing component deform and fit the inner walls of the two, so that the compression of multiple sealing devices in the closing component is uniform, reducing the probability of leakage. Afterwards, the closing component is squeezed multiple times by the extrusion component to eliminate the internal stress generated by the pressure on the closing component, effectively preventing the closing component from generating strong internal stress during the extrusion process. If the internal stress is too strong and unevenly distributed, tiny gaps will appear in some areas, and the gas in the shell can penetrate through these gaps to form a leakage channel.

[0007] Preferably, the limiting mechanism includes: A blocking component is slidably disposed on the inner wall of the flange plate 1 and is used to block the closing component; The fitting component is fixedly arranged on the inner wall of the flange plate 1 and is used to fit the connection between the flange plate 1 and the flange plate 2; Among them, when the extrusion component moves, it will push the blocking component to move, block the closing component, and limit the pressure state of the closing component. When the shell is assembled, the inert gas inside the shell will squeeze the fitting component, allowing the fitting component to fit at the connection between flange 1 and flange 2, reducing the maintenance times of flange 1 and flange 2, and avoiding the difficulty of flange 1 and flange 2 to fit tightly after being disassembled many times, which makes the sealing effect worse.

[0008] Preferably, six bolts are slidably connected to the inner wall of flange one, six nuts are rotatably connected to the top of flange two, and the outer walls of the six bolts are threadedly connected to the inner walls of the six nuts; When the shell needs to be assembled, flange one and flange two are fitted together, and then the nut is rotated to connect the nut with the bolt to fix flange one and flange two together.

[0009] Preferably, the mounting assembly includes a sealing groove 1 formed on the inner walls of flange 1 and flange 2, and a sealing groove 2 is formed on the inner walls of flange 1 and flange 2.

[0010] 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 are provided on the outer wall of the sealing ring 2, and the side walls of the two arc-shaped extrusion plates are fixedly connected to the side walls of the two spring return rods; Among them, during the descending process of flange plate 2, flange plate 2 will squeeze sealing ring 1 and sealing ring 2, causing both to deform and fit with flange plate 1 and flange plate 2 respectively. Since the inner diameter of sealing groove 1 is larger than the outer diameter of sealing ring 1, sealing ring 1 has a larger deformation space. When flange plate 2 descends, it will drive the bevel ring to descend. As the bevel ring continues to move, the bevel ring will contact the spring return rod. The bevel of the bevel ring will squeeze the arc surface of the spring return rod, pushing the spring return rod to move toward sealing ring 2; At the same time, the spring return rod accumulates rebound force. When the spring return rod moves, it will drive the arc extrusion plate to move, causing the arc extrusion plate to squeeze the sealing ring 2, applying additional extrusion force to the sealing ring 2, and by increasing the sealing groove 1 of the sealing ring 1 near the bolt, the compressed deformation of the sealing ring 1 is allowed to moderately diffuse, thereby alleviating excessive extrusion near the bolt, and by actively squeezing the sealing ring 2 away from the bolt, a greater extrusion force is applied, so that the sealing ring 2 is fully fitted with the flange 1 and the flange 2, so that the compression of the sealing ring 1 and the sealing ring 2 is uniform, thereby reducing the probability of leakage.

[0011] Preferably, the extrusion assembly includes a spring concave-convex ring slidably connected to the inner wall of the annular groove, twenty spring extrusion rods are slidably connected to the inner walls of the flange plate 1 and the flange plate 2, arc blocks are fixedly connected to the side walls of the forty spring extrusion rods, and the top of the spring concave-convex ring is fixedly connected to the concave-convex extrusion ring; Among them, when the bevel ring descends, the bevel ring will also contact the spring concave-convex ring, which will squeeze the spring concave-convex ring down, causing it to accumulate rebound force. When the spring concave-convex ring descends, the convex position of the spring concave-convex ring will squeeze multiple spring extrusion rods, allowing the spring extrusion rods to accumulate rebound force, causing the spring extrusion rods to move toward the second sealing ring, driving the arc block to move, causing multiple arc blocks to squeeze the second sealing ring. As the spring concave-convex ring continues to move, the convex position of the spring concave-convex ring will separate from the spring extrusion rod. At this time, the rebound force of the spring extrusion rod will be released, driving the arc block to return to its position, until the convex position of the spring concave-convex ring squeezes the spring extrusion rod again, causing the arc block to squeeze the second sealing ring again, and so on.

[0012] Preferably, the blocking assembly includes twenty arc-shaped baffles slidably connected to the inner wall of the sealing groove, the side walls of the twenty arc-shaped baffles are fixedly connected to push rods, the outer walls of the twenty push rods are slidably connected to the inner wall of the flange, and the outer walls of the twenty push rods are slidably connected to spring sleeves; Among them, when the spring concave-convex ring descends, it will drive the concave-convex extrusion ring to descend, squeezing the spring extrusion rod at the top to move. At the same time, when the spring concave-convex ring descends, the convex position of the spring concave-convex ring will also squeeze multiple spring sleeves, so that they accumulate rebound force, allowing multiple spring sleeves to move toward the first direction of the sealing ring. The spring sleeve will push the push rod and the arc-shaped baffle to move, allowing the arc-shaped baffle to squeeze the sealing ring. As the spring concave-convex ring continues to move, the concave position of the spring concave-convex ring will also separate from the spring sleeve, so that the rebound force of the spring sleeve is released, allowing the arc-shaped baffle to return to its position, until the convex position of the spring concave-convex ring squeezes the spring sleeve again, allowing the arc-shaped baffle to squeeze the sealing ring again. The four sides of the sealing ring 2 are evenly squeezed by multiple arc blocks, and the four sides of the sealing ring 1 are evenly squeezed by multiple arc baffles. At the same time, multiple extrusions are performed. Since the sealing ring 1 and the sealing ring 2 are composed of materials such as rubber, rubber and other materials have viscoelasticity, which are both elastic and viscous. After each extrusion and separation, the elastic parts of the sealing ring 1 and the sealing ring 2 can quickly recover and release part of the internal stress, so that the sealing ring 1 and the sealing ring 2 are finally fitted with the flange 1 and the flange 2 under a stable stress state, effectively preventing the sealing ring 1 and the sealing ring 2 from generating strong internal stress during the extrusion process. The sealing core of the sealing ring 1 and the sealing ring 2 is to form a tightly fitting continuous contact zone through elastic deformation. If the internal stress generated by the extrusion is too strong and unevenly distributed, small gaps will appear in some areas, and the gas in the shell can penetrate through these gaps to form a leakage channel.

[0013] Preferably, the fitting assembly includes an annular block fixedly connected to an inner wall of the flange, a rubber ring is slidably connected to the inner wall of the annular block, a spring annular plate is fixedly connected to the bottom of the rubber ring, and a retaining ring is fixedly connected to the inner wall of the annular block; Among them, when the shell is assembled and in a closed state, inert gas is injected into the shell until the inert gas in the shell generates high pressure. At this time, the inert gas will enter the annular block, squeezing the rubber ring down, squeezing the spring annular plate, and accumulating rebound force. Since the contact surface between the annular block and the rubber ring is an inclined surface, at this time, the side wall of the rubber ring will be squeezed and deformed, allowing the rubber ring to fit with flange one and flange two until the rubber ring is blocked by the retaining ring. At this time, the rubber ring will move to the connection between flange one and flange two, 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, causing it to withstand excessive pressure for a long time and exhibit elastic attenuation, which can easily cause damage to the sealing ring two. 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 being more synchronized with the service life of the sealing ring one, avoiding the difficulty of the flange one and flange two to fit tightly after being disassembled many times, resulting in poor sealing effect.

[0014] The present invention has the following beneficial effects: (1) When the present invention is used, when it is necessary to form a shell and connect flange 1 and flange 2, flange 1 and flange 2 are fixed by combining components. During the process of flange 2 descending, flange 2 will squeeze sealing ring 1 and sealing ring 2. Since the inner diameter of sealing groove 1 is larger than the outer diameter of sealing ring 1, sealing ring 1 has a larger deformation space. When flange 2 descends, it will drive the bevel ring to descend. The bevel ring will push the spring return rod to move toward sealing ring 2, so that the arc-shaped extrusion plate squeezes sealing ring 2. By allowing the deformation of sealing ring 1 under pressure to diffuse moderately, excessive extrusion near the bolt is alleviated. By actively squeezing sealing ring 2 away from the bolt, a greater extrusion force is applied, so that sealing ring 2 is fully fitted with flange 1 and flange 2, so that the compression of sealing ring 1 and sealing ring 2 is uniform, and the probability of leakage is reduced.

[0015] (2) In the present invention, when the bevel ring descends, the bevel ring will also contact the spring concave-convex ring, and will squeeze the spring concave-convex ring downward. When the spring concave-convex ring descends, the protruding position of the spring concave-convex ring will squeeze multiple spring squeezing rods, and through the squeezing component, multiple arc blocks will squeeze the sealing ring 2. At the same time, when the spring concave-convex ring descends, the protruding position of the spring concave-convex ring will also squeeze multiple spring sleeves, and through the blocking component, multiple arc baffles will squeeze the sealing ring 1. The four sides of the sealing ring 2 are uniformly squeezed by multiple arc blocks, and the four sides of the sealing ring 1 are uniformly squeezed by multiple arc baffles. At the same time, multiple squeezing will be performed. After each squeezing and separation, the elastic parts of the sealing ring 1 and the sealing ring 2 can quickly recover and release part of the internal stress, effectively preventing the sealing ring 1 and the sealing ring 2 from generating strong internal stress during the squeezing process. If the internal stress is too strong and unevenly distributed, small gaps will appear in some areas, and the gas in the shell can penetrate through these gaps to form a leakage channel.

[0016] (3) In the present invention, when multiple arc-shaped baffles squeeze the sealing ring 1 and the sealing ring 1 is deformed, the arc-shaped baffles will also be squeezed in the reverse direction to move, so that the arc-shaped baffles apply a reverse thrust to the sealing ring 1, so that when the flange 2 squeezes the sealing ring 1, the sealing ring 1 is vertically compressed, effectively preventing 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, part of the area will be deflected, affecting the close fit with the flange 2.

[0017] (4) When the shell of the present invention is assembled and in a closed state, inert gas is injected into the shell until the inert gas in the shell generates high pressure. At this time, the inert gas will enter the annular block, squeeze the rubber ring downward, and move the rubber ring to the connection between flange 1 and flange 2 through the fitting assembly, so as to seal the connection and extend the closed path of the high-pressure inert gas. This effectively prevents the sealing ring 2 from being continuously squeezed by the high-pressure inert gas, causing it to withstand excessive pressure for a long time and exhibit elastic attenuation, which can easily cause damage to the sealing ring 2. The sealing ring 1 needs to be replaced before its service life is reached, thereby extending the service life of the sealing ring 2 and making it more synchronized with the service life of the sealing ring 1. This avoids the situation where the flange 1 and flange 2 are difficult to fit tightly after being disassembled many times, which deteriorates the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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.

[0019] Figure 1 It is a schematic cross-sectional view of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic cross-sectional view of the housing of the present invention; Figure 4 This is a schematic cross-sectional view of a flange according to the present invention; Figure 5 This is a schematic cross-sectional view of the flange of the present invention; Figure 6 For the present invention Figure 5 A in the middle is an enlarged schematic diagram; Figure 7 This is a schematic diagram of the working process of flange 1 and flange 2 of the present invention; Figure 8 For the present invention Figure 7 The enlarged schematic diagram of point B in the middle; Figure 9 This is a partial exploded schematic diagram of the sealing mechanism of the present invention; Figure 10 This is a schematic exploded cross-sectional view of a portion of the sealing mechanism of the present invention; Figure 11 It is a top view schematic diagram of the concave and convex ring of the spring of the present invention.

[0020] In the accompanying drawings, the components represented by the reference numerals are as follows: In the figure: 1. Main body; 11. Combination assembly; 12. Mounting assembly; 111. Shell; 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. Closing assembly; 22. Extrusion assembly; 211. Sealing ring 1; 212. Sealing ring 2; 213. Bevel 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. Limiting 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 DESCRIPTION

[0021] 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.

[0022] For 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, the top and bottom of the shell 111 are fixedly connected to two flanges 112, and the four flanges 112 are each provided with a flange 2 113 on a side away from the shell 111; The main body 1 has a combination assembly 11 fixed on the top of the main body 1, and a mounting assembly 12 installed on the inner wall of the main body 1. The combination assembly 11 is used to connect the flange 112 with the flange 2 113; Sealing mechanism 2, which is installed on the inner wall of the assembly 11 and is used to seal the connection between flange 1 112 and flange 2 113; and 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; The four flanges 112 contain the same parts, and the four flanges 113 contain the same parts. An annular groove 123 is formed on the inner wall of the flange 112. A bevel ring 213 is fixedly connected to the inner wall of the flange 2 113. 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 through the combination component 11. During the connection process, the connection between the two is sealed by the sealing mechanism 2 to avoid gas leakage at the connection position. Finally, the stress generated by extrusion is reduced by the limiting mechanism 3, so that the sealing mechanism 2 and the connection between flange one 112 and flange two 113 are fully fitted.

[0023] The main body 1 includes: The bottom of the assembly 11 is fixed to the top of the housing 111 and is used to connect the flange 112 to the flange 2 113; The mounting assembly 12 is fixedly provided at the outer wall of the mounting assembly 12 and the inner wall of the flange 112 for mounting a seal; When the housing 111 needs to be sealed, the operator fits the flange 112 and the flange 2 113 together, and then fixes the two together through the assembly 11 .

[0024] The sealing mechanism 2 comprises: The closing component 21 is slidably disposed on the inner wall of the flange 112 and is used to seal the connection between the flange 112 and the flange 2 113; An extrusion assembly 22 is slidably disposed on the inner wall of the annular groove 123 to reduce the internal stress generated by the closing assembly 21; Among them, during the fitting process of flange 112 and flange 2 113, the closing component 21 will be squeezed, causing the closing component 21 to deform and fit the inner walls of the two, so that the compression of multiple sealing devices in the closing component 21 is uniform, reducing the probability of leakage. Afterwards, the closing component 21 is squeezed multiple times by the extrusion component 22 to eliminate the internal stress generated by the pressure on the closing component 21, effectively preventing the closing component 21 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, and the gas in the shell 111 can penetrate through these gaps to form a leakage channel.

[0025] Restriction agencies 3 include: The blocking component 31 is slidably disposed on the inner wall of the flange 112 and is used to block the closing component 21; The fitting component 32 is fixedly disposed on the inner wall of the flange 112 and is used to fit the connection between the flange 112 and the flange 2 113; Among them, when the extrusion component 22 moves, it will push the blocking component 31 to move, blocking the closing component 21 and limiting the pressure state of the closing component 21. When the shell 111 is assembled, the inert gas inside the shell 111 will squeeze the fitting component 32, allowing the fitting component 32 to fit into the connection between flange 1 112 and flange 2 113, reducing the maintenance times of flange 1 112 and flange 2 113, and avoiding the difficulty of flange 1 112 and flange 2 113 to fit tightly after being disassembled many times, thereby making the sealing effect worse.

[0026] For 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 threadedly connected to the inner walls of the six nuts 114. When the housing 111 needs to be assembled, the flange 112 and the flange 2 113 are fitted together, and then the nut 114 is rotated to connect the nut 114 with the bolt 115 to fix the flange 112 and the flange 2 113 together.

[0027] The mounting assembly 12 includes a first sealing groove 121 formed on the inner walls of the first flange 112 and the second flange 113 , and a second sealing groove 122 is formed on the inner walls of the first flange 112 and the second flange 113 .

[0028] The closure assembly 21 includes a first sealing ring 211 slidably connected to the inner wall of the first sealing groove 121, a second sealing ring 212 slidably connected to the inner wall of the second sealing groove 122, and two arc-shaped extrusion plates 215 provided on the outer wall of the second 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. During the descent of the second flange 113, the second flange 113 squeezes the first sealing ring 211 and the second sealing ring 212, causing both to deform and fit against the first flange 112 and the second flange 113, respectively. Since the inner diameter of the first sealing groove 121 is larger than the outer diameter of the first sealing ring 211, the first sealing ring 211 has a larger deformation space. When the second flange 113 descends, the inclined ring 213 is driven to descend. As the inclined ring 213 continues to move, the inclined ring 213 contacts the spring return rod 214. The inclined surface of the inclined ring 213 squeezes the arc surface of the spring return rod 214, pushing the spring return rod 214 toward the second sealing ring 212. At the same time, the spring return rod 214 accumulates resilience. 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 squeeze the sealing ring 212, exerting additional extrusion force on the sealing ring 212, and by increasing the sealing groove 121 of the sealing ring 1 211 near the bolt 115, the compressed deformation of the sealing ring 1 211 is allowed to moderately diffuse, thereby alleviating excessive extrusion near the bolt 115, and by actively squeezing the sealing ring 212 away from the bolt 115, a greater extrusion force is exerted, so that the sealing ring 212 is fully fitted with the flange 112 and the flange 2 113, so that the compression of the sealing ring 1 211 and the sealing ring 2 212 is uniform, thereby reducing the probability of leakage.

[0029] 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 are slidably connected to the inner walls of the flange 112 and the flange 2 113. The side walls of the forty spring extrusion rods 222 are fixedly connected to arc blocks 223. The top of the spring concave-convex ring 221 is fixedly connected to a concave-convex extrusion ring 224. The spring extrusion rod 222 is pressed against the sealing ring 212, and the spring extrusion rod 223 is pressed against the sealing ring 212, and the spring extrusion rod 223 is pressed against the sealing ring 212.

[0030] The blocking assembly 31 includes twenty arc-shaped baffles 313 slidably connected to the inner wall of the sealing groove 121. The side walls of the twenty arc-shaped baffles 313 are fixedly connected to push rods 312. The outer walls of the twenty push rods 312 are slidably connected to the inner wall of the flange 112. The outer walls of the twenty push rods 312 are slidably connected to the spring sleeves 311. When the spring concave-convex ring 221 descends, it drives the concave-convex extrusion ring 224 to descend, squeezing the spring extrusion rod 222 at the top to move. At the same time, when the spring concave-convex ring 221 descends, the convex position of the spring concave-convex ring 221 will also squeeze the multiple spring sleeves 311, so that it accumulates resilience, allowing the multiple spring sleeves 311 to move toward the sealing ring 1 211. The spring sleeve 311 will push the pushing rod 312 and the arc-shaped baffle 313 to move, allowing the arc-shaped baffle 313 to squeeze the sealing ring 1 211. 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, so that the resilience of the spring sleeve 311 is released, allowing the arc-shaped baffle 313 to return to its original position, until the convex position of the spring concave-convex ring 221 squeezes the spring sleeve 311 again, allowing the arc-shaped baffle 313 to squeeze the sealing ring 1 211 again. The plurality of arc blocks 223 are used to uniformly squeeze the four sides of the sealing ring 212, and the plurality of arc baffles 313 are used to uniformly squeeze the four sides of the sealing ring 1 211. At the same time, multiple squeezing operations are performed. Since the sealing ring 1 211 and the sealing ring 2 212 are made of materials such as rubber, and materials such as rubber have viscoelasticity, which means both elasticity and viscosity, after each squeezing and separation, the elastic parts of the sealing ring 1 211 and the sealing ring 2 212 can quickly recover and release part of the internal stress, so that the sealing ring 1 211 and the sealing ring 2 212 are finally fitted with the flange 112 and the flange 2 113 under a stable stress state, effectively preventing the sealing ring 1 211 and the sealing ring 2 212 from generating strong internal stress during the squeezing process. The sealing core of the sealing ring 1 211 and the sealing ring 2 212 is formed by elastic deformation to form a tightly fitting continuous contact zone. If the internal stress generated by the squeezing is too strong and unevenly distributed, small gaps will appear in some areas, and the gas in the shell 111 can penetrate through these gaps to form a leakage channel.

[0031] The fitting assembly 32 includes an annular block 321 fixedly connected to the inner wall of the flange 112, a rubber ring 322 is slidably connected to the inner wall of the annular block 321, a spring annular plate 323 is fixedly connected to the bottom of the rubber ring 322, and a retaining ring 324 is fixedly connected to the inner wall of the annular block 321; Among them, when the shell 111 is assembled and in a closed state, inert gas is injected into the shell 111 until the inert gas in the shell 111 generates high pressure. At this time, the inert gas will enter the annular block 321, squeezing the rubber ring 322 to descend, squeezing the spring annular plate 323, and accumulating resilience. Since the contact surface between the annular block 321 and the rubber ring 322 is an inclined surface, the side wall of the rubber ring 322 will be squeezed and deformed, making the rubber ring 322 fit with the flange 112 and the flange 2 113 until the rubber ring 322 is blocked by the retaining ring 324. At this time, the rubber ring 322 is The rubber ring 322 will move to the connection between the flange 112 and the flange 2 113 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, causing it to withstand excessive pressure for a long time and experience elastic attenuation, which can easily cause damage to the sealing ring 212. The sealing ring 1 211 needs to be replaced before its service life is reached, thereby extending the service life of the sealing ring 212 and making it more synchronized with the service life of the sealing ring 1 211, avoiding the situation where the flange 112 and the flange 2 113 are difficult to fit tightly together after being disassembled many times, resulting in a deterioration of the sealing effect.

[0032] There is no limit to the number of the above components, and relevant technicians in this field can freely set them according to actual needs. It is only necessary to ensure that the above components are installed at the connection positions of the corresponding components.

[0033] A specific application of this embodiment is as follows: when the present invention is used, when it is necessary to form the housing 111 and connect the flange 112 with the flange 2 113, the sealing ring 1 211 is placed in the sealing groove 121 in the flange 1 112, and the sealing ring 2 212 is placed in the sealing groove 2 122 of the flange 1 112. The operator fits the flange 2 113 with the flange 1 112 so that the sealing ring 1 211 enters the sealing groove 121 of the flange 2 113 and the sealing ring 2 212 enters the sealing groove 2 122 of the flange 2 113. After that, the nut 114 is turned to connect with the bolt 115 to fix the flange 1 112 and the flange 2 113. Figure 7 As shown; During the descent of the second flange 113, the second flange 113 squeezes the first sealing ring 211 and the second sealing ring 212, causing both to deform and fit against the first flange 112 and the second flange 113, respectively. Since the inner diameter of the first sealing groove 121 is larger than the outer diameter of the first sealing ring 211, the first sealing ring 211 has a larger deformation space. When the second flange 113 descends, the inclined ring 213 is driven to descend. As the inclined ring 213 continues to move, the inclined ring 213 contacts the spring return rod 214. The inclined surface of the inclined ring 213 squeezes the arc surface of the spring return rod 214, pushing the spring return rod 214 toward the second sealing ring 212. At the same time, the spring return rod 214 accumulates a 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 squeeze the sealing ring 212, exerting additional extrusion force on the sealing ring 212. By enlarging the sealing groove 121 of the sealing ring 1 211 near the bolt 115, the deformation of the sealing ring 1 211 under pressure is allowed to moderately diffuse, thereby alleviating excessive extrusion near the bolt 115. By actively squeezing the sealing ring 212 away from the bolt 115, a greater extrusion force is exerted, allowing the sealing ring 212 to fully fit with the flange 112 and the flange 2 113, so that the compression of the sealing ring 1 211 and the sealing ring 212 is uniform, thereby reducing the probability of leakage. Secondly, when the bevel ring 213 descends, the bevel ring 213 will also contact the spring concave-convex ring 221, which will squeeze the spring concave-convex ring 221 downward, causing it to accumulate a rebound force. When the spring concave-convex ring 221 descends, the convex position of the spring concave-convex ring 221 will squeeze multiple spring squeezing rods 222, allowing the spring squeezing rods 222 to accumulate a rebound force, causing the spring squeezing rods 222 to move toward the second sealing ring 212, driving the arc block 223 to move, causing multiple arc blocks 223 to squeeze the second sealing ring 212. As the spring concave-convex ring 221 continues to move, the convex position of the spring concave-convex ring 221 will separate from the spring squeezing rod 222. At this time, the rebound force of the spring squeezing rod 222 will be released, driving the arc block 223 to return to its original position until the convex position of the spring concave-convex ring 221 squeezes the spring squeezing rod 222 again, causing the arc block 223 to squeeze the second sealing ring 212 again, and so on. When the spring concave-convex ring 221 descends, it drives the concave-convex extrusion ring 224 to descend, squeezing the spring extrusion rod 222 at the top to move. At the same time, when the spring concave-convex ring 221 descends, the convex position of the spring concave-convex ring 221 will also squeeze the multiple spring sleeves 311, so that it accumulates resilience, allowing the multiple spring sleeves 311 to move toward the sealing ring 1 211. The spring sleeve 311 will push the pushing rod 312 and the arc-shaped baffle 313 to move, allowing the arc-shaped baffle 313 to squeeze the sealing ring 1 211. 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, so that the resilience of the spring sleeve 311 is released, allowing the arc-shaped baffle 313 to return to its original position, until the convex position of the spring concave-convex ring 221 squeezes the spring sleeve 311 again, allowing the arc-shaped baffle 313 to squeeze the sealing ring 1 211 again. The plurality of arc blocks 223 are used to uniformly squeeze the periphery of the second sealing ring 212, and the plurality of arc baffles 313 are used to uniformly squeeze the periphery of the first sealing ring 211. At the same time, multiple squeezing operations are performed. Since the first sealing ring 211 and the second sealing ring 212 are made of materials such as rubber, and materials such as rubber have viscoelasticity, i.e., both elasticity and viscosity, after each squeezing and separation, the elastic parts of the first sealing ring 211 and the second sealing ring 212 can quickly recover, releasing part of the internal stress, and finally making the first sealing ring 211 and the second sealing ring 212 fit with the first flange 112 and the second flange 113 under a stable stress state, effectively preventing the first sealing ring 211 and the second sealing ring 212 from generating strong internal stress during the squeezing process. The sealing core of the first sealing ring 211 and the second sealing ring 212 is formed by elastic deformation to form a tightly fitting continuous contact zone. If the internal stress generated by the squeezing is too strong and unevenly distributed, small gaps will appear in some areas, and the gas in the housing 111 can penetrate through these gaps to form a leakage channel. Secondly, when the multiple arc-shaped baffles 313 squeeze the sealing ring 1 211, the sealing ring 1 211 is deformed, and the arc-shaped baffles 313 are also squeezed in the opposite direction to move, so that the arc-shaped baffles 313 exert a reverse thrust on the sealing ring 1 211. When the flange 2 113 squeezes the sealing ring 1 211, the sealing ring 1 211 is vertically compressed, effectively preventing the inner diameter of the sealing groove 121 from being larger than the outer diameter of the sealing ring 1 211. When the sealing ring 1 211 is squeezed, part of the area will be deflected, affecting the close fit with the flange 2 113. Secondly, when the shell 111 is assembled and in a closed state, inert gas is injected into the shell 111 until the inert gas in the shell 111 generates high pressure. At this time, the inert gas enters the annular block 321, squeezing the rubber ring 322 downward, squeezing the spring annular plate 323, and accumulating resilience. Since the contact surface between the annular block 321 and the rubber ring 322 is an inclined surface, the side wall of the rubber ring 322 is squeezed and deformed, making the rubber ring 322 fit with the flange 112 and the flange 2 113 until the rubber ring 322 is blocked by the retaining ring 324. At this time, the rubber ring 322 is The rubber ring 322 will move to the connection between the flange 112 and the flange 2 113 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, causing it to withstand excessive pressure for a long time and experience elastic attenuation, which can easily cause damage to the sealing ring 212. The sealing ring 1 211 needs to be replaced before its service life is reached, thereby extending the service life of the sealing ring 212 and making it more synchronized with the service life of the sealing ring 1 211, avoiding the situation where the flange 112 and the flange 2 113 are difficult to fit tightly together after being disassembled many times, resulting in a deterioration of the sealing effect.

[0034] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present 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 the top and bottom of the shell (111) are fixedly connected to two flanges (112), and four flanges (112) are each provided with flanges (113) on one side away from the shell (111), characterized in that: Also includes: A main body mechanism (1), wherein a combination assembly (11) is fixedly provided on the top of the main body mechanism (1), a mounting assembly (12) is installed on the inner wall of the main body mechanism (1), and the combination assembly (11) is used to connect flange plate 1 (112) and flange plate 2 (113); A sealing mechanism (2), the sealing mechanism (2) being installed on the inner wall of the assembly (11) and used for sealing the connection between the first flange (112) and the second flange (113); and A limiting mechanism (3), the limiting mechanism (3) being located on the inner wall of the combined component (11) and being used to eliminate deformation of the sealing mechanism (2); The four flanges (112) contain the same parts inside, and the four flanges (113) contain the same parts inside. An annular groove (123) is provided on the inner wall of the flange (112), a bevel ring (213) is fixedly connected to the inner wall of the flange (113), and two spring return rods (214) are slidably connected to the inner wall of the flange (112). The flange 1 (112) and the flange 2 (113) are connected together by the combined assembly (11). During the connection process, the connection between the two is sealed by the sealing mechanism (2). Finally, the stress generated by the extrusion is reduced by the limiting mechanism (3).

2. The GIS housing structure with a double sealing structure according to claim 1, characterized in that: The main body (1) comprises: A combination assembly (11), wherein the bottom of the combination assembly (11) is fixedly arranged on the top of the housing (111) and is used to connect the flange plate 1 (112) and the flange plate 2 (113); A mounting assembly (12), wherein the outer wall of the mounting assembly (12) is fixedly arranged on the inner wall of the flange (112) for mounting a seal; When the housing (111) needs to be sealed, the operator fits the flange 1 (112) and the flange 2 (113) together, and then fixes the two together through the assembly (11).

3. The GIS housing structure with a double sealing structure according to claim 2, characterized in that: The sealing mechanism (2) comprises: A closing component (21), wherein the closing component (21) is slidably disposed on the inner wall of the first flange (112) and is used to seal the connection between the first flange (112) and the second flange (113); An extrusion assembly (22), the extrusion assembly (22) being slidably disposed on the inner wall of the annular groove (123) and being used to reduce the internal stress generated by the closing assembly (21); In the process of fitting flange 1 (112) and flange 2 (113), the closing component (21) is squeezed to deform and fit the inner walls of the two flanges. Afterwards, the closing component (21) is squeezed multiple times by the squeezing component (22) to eliminate the internal stress generated by the pressure on the closing component (21).

4. The GIS housing structure with a double sealing structure according to claim 3, characterized in that: The limiting mechanism (3) comprises: A blocking component (31), the blocking component (31) being slidably disposed on the inner wall of the first flange (112) and being used to block the closing component (21); A fitting component (32), the fitting component (32) being fixedly arranged on the inner wall of the first flange (112) and used for fitting the connection between the first flange (112) and the second flange (113); When the extrusion component (22) moves, it pushes the blocking component (31) to move, blocks the closing component (21), and limits the pressure state of the closing component (21). When the shell (111) is assembled, the inert gas inside the shell (111) squeezes the fitting component (32), allowing the fitting component (32) to fit at the connection between flange 1 (112) and flange 2 (113).

5. The GIS housing structure with a double sealing structure according to claim 4, characterized in that: The inner wall of the flange plate 1 (112) is slidably connected with six bolts (115), the top of the flange plate 2 (113) is rotatably connected with six nuts (114), and the outer walls of the six bolts (115) are all threadedly connected to the inner walls of the six nuts (114); When the housing (111) needs to be assembled, flange one (112) and flange two (113) are fitted together, and then the nut (114) is rotated to connect the nut (114) with the bolt (115), thereby fixing flange one (112) and flange two (113) together.

6. The GIS housing structure with a double sealing structure according to claim 5, characterized in that: The mounting assembly (12) includes a sealing groove (121) provided on the inner walls of flange plate 1 (112) and flange plate 2 (113), and a sealing groove (122) is provided on the inner walls of flange plate 1 (112) and flange plate 2 (113).

7. The GIS housing structure with a double sealing structure according to claim 6, characterized in that: The closure 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) are provided on the outer wall of the sealing ring 2 (212), and 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); In the process of the second flange (113) descending and fitting with the first flange (112), the second flange (113) will squeeze the first sealing ring (211) and the second sealing ring (212), causing both to deform and fit the first sealing groove (121) and the second sealing groove (122). At the same time, the bevel 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 the second sealing ring (212).

8. The GIS housing structure with a double sealing structure according to claim 7, characterized in that: The extrusion assembly (22) includes a spring concave-convex ring (221) slidably connected to the inner wall of the annular groove (123), and twenty spring extrusion rods (222) are slidably connected to the inner walls of the flange plate 1 (112) and the flange plate 2 (113); The side walls of the forty spring extrusion rods (222) are all fixedly connected with arc blocks (223), and the top of the spring concave-convex ring (221) is fixedly connected with a concave-convex extrusion ring (224); During the descending process of the bevel ring (213), the bevel ring (213) also pushes the spring concave-convex ring (221) and the concave-convex extrusion ring (224) to descend, so that the arc block (223) squeezes the sealing ring 2 (212) multiple times, thereby eliminating the stress of the sealing ring 2 (212).

9. The GIS housing structure with a double sealing structure according to claim 8, 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 the side walls of the twenty arc-shaped baffles (313) are fixedly connected to a push rod (312); The outer walls of the twenty push rods (312) are all slidably connected to the inner wall of the flange (112), and the outer walls of the twenty push rods (312) are all slidably connected to a spring sleeve (311); When the spring concave-convex ring (221) descends, it squeezes the spring sleeve (311) to move, pushes the push rod (312) to move, and drives the arc baffle (313) to move, so that the arc baffle (313) squeezes the sealing ring (211) multiple times, eliminating the stress of the sealing ring (211).

10. The GIS housing structure with a double sealing structure according to claim 9, characterized in that: The fitting assembly (32) includes an annular block (321) fixedly connected to the inner wall of the flange (112), a rubber ring (322) is slidably connected to the inner wall of the annular block (321), a spring annular plate (323) is fixedly connected to the bottom of the rubber ring (322), and a retaining ring (324) is fixedly connected to the inner wall of the annular block (321); When the shell (111) is assembled, high-pressure inert gas is injected into the shell (111), and the inert gas squeezes the rubber ring (322), causing the rubber ring (322) to descend and fit the connection between the flange 1 (112) and the flange 2 (113).

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