A GIS high-voltage switch housing with an insulating protective structure

Abstract

The utility model discloses a GIS high -voltage switch casing with insulating protection structure applied to gas insulation switch device field, when the switch casing appears routine leakage, the switch casing and the compensation chamber inside protection gas pressure drop, the compensation chamber high pressure gas will push the sealed ball, makes sealed ball and sealing ring separate, and the compensation chamber inside protection gas flows into the intercommunication chamber from the clearance of sealing ring and sealed ball, and the compensation of protection gas in the intercommunication chamber and switch casing is compensated, and after the pressure balance in the intercommunication chamber and compensation chamber, under the action of compression spring, sealed ball will be reset, makes switch casing inside protection gas pressure not easy too low, not easy influence switch casing inside insulation effect, and add the compensation unit in the compensation chamber, can carry out the compensation of protection gas in the compensation chamber in the subsequent use process, prolongs the service life of insulation protection structure.

Description

Technical Field

[0001] This utility model relates to the field of gas-insulated switchgear, and in particular to a GIS high-voltage switch housing with an insulating protective structure. Background Technology

[0002] GIS high-voltage switchgear (gas-insulated switchgear) is a high-voltage power equipment that integrates key components such as circuit breakers and disconnectors. It adopts SF6 gas insulation technology and has core advantages such as small size and high reliability.

[0003] In the invention application with publication number CN115995770A, a highly enclosed GIS high-voltage switch housing is disclosed. When SF6 gas leaks inside the switch cabinet housing, the SF6 gas stored in the gas storage bladder is released to replenish the gas pressure, thus providing a supplement to the SF6 gas loss caused by the leak inside the switch cabinet housing and ensuring the insulation and arc extinguishing effect inside the switch cabinet housing.

[0004] In the invention application with publication number CN120433077A, a GIS high-voltage switch housing structure with monitoring function is disclosed. It is equipped with a sealing structure for sealing indication, which can directly obtain the gas pressure change result by observing the size of the indication air bladder or the position of the indication rod. This allows the staff to intuitively observe SF6 gas leakage and carry out timely maintenance. In addition, the housing structure is made more stable and reliable by setting a flexible sealing body, an inner pressure ring bladder or a sealing ring.

[0005] In the prior art, a corresponding protective gas replenishment structure has been designed to address the problem of protective gas leakage in GIS high-voltage switches, thereby maintaining the insulation performance of the GIS high-voltage switches. However, once the above-mentioned protective gas replenishment structure is triggered, it cannot be stopped. GIS high-voltage switches themselves have a certain degree of gas leakage. Once the GIS high-voltage switch leaks normally, causing the internal gas pressure to drop to the level triggered by the protective gas replenishment structure, the replenished high-voltage protective gas can easily cause deformation and damage to the GIS high-voltage switch, accelerating the leakage of protective gas and affecting the insulation effect of the GIS high-voltage switch. Utility Model Content

[0006] The core of this invention lies in solving the problem of daily leakage in GIS high-voltage switches that is difficult to address in existing technologies through an insulating protective structure. Simultaneously, a compensation unit is incorporated to effectively extend the service life of the insulating protective structure.

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A GIS high-voltage switch housing with an insulating protective structure includes a switch housing, a mounting groove is chiseled at the lower end of the switch housing, a one-way valve that matches itself is fixedly connected to the bottom of the mounting groove, and an insulating protective structure that matches itself is inserted into the mounting groove.

[0009] The insulating protective structure includes a protective bottle threaded to the inner wall of the mounting groove. An elastic sealing layer and a sealing ring are fixedly connected to the inner wall of the protective bottle from top to bottom. The sealing ring divides the protective bottle into two parts: a connecting chamber and a compensation chamber. Both the connecting chamber and the compensation chamber are filled with a protective gas with the same atmosphere as the switch housing. The connecting chamber is located on the side of the sealing ring closer to the elastic sealing layer. A sealing ball is placed in the connecting chamber. A rigid ring is fixedly connected to the lower end of the elastic sealing layer. A compression spring is fixedly connected between the rigid ring and the sealing ball. A matching movable plate is slidably connected to the opening of the protective bottle. A connecting needle is inserted into the movable plate, and the connecting needle penetrates the elastic sealing layer and extends into the connecting chamber.

[0010] The insulating protective structure protects the switch housing, ensuring that the pressure of the protective gas inside the switch housing is not too low and thus does not affect the insulation effect inside the switch housing.

[0011] Furthermore, a protective unit is fixedly connected to the upper end of the movable plate. The protective unit covers the outside of the connecting needle tube. The protective unit is made of modeling clay, and the outside of the modeling clay is covered with a plastic protective film. The protective unit protects the connecting needle tube, while the plastic protective film can prevent the modeling clay from losing too much water and easily deforming continuously under the pressure of the one-way valve.

[0012] Furthermore, in the initial state, the pressure of the protective gas in the connecting chamber is the same as the pressure of the protective gas in the switch housing, and the pressure of the protective gas in the compensation chamber is 1.2 times that in the connecting chamber, which is used to compensate for the force generated by the deformation of the compression spring.

[0013] Optionally, a compensation unit is fixedly connected to the compensation chamber of the insulation protection structure. A pressure push plate is fixedly connected to the upper end of the compensation unit, and a compensation needle is fixedly connected to the lower end of the sealing ring. Multiple connecting holes are drilled at the end of the compensation needle near the sealing ring. A notch matching the compensation needle is drilled on the pressure push plate. The compensation unit is filled with protective gas at twice the pressure of the connecting chamber. Adding a compensation unit extends the service life of the insulation protection structure.

[0014] Furthermore, a viewing window matching the position of the insulation protection structure is cut into the lower end of the switch housing. A transparent acrylic plate is fixedly connected inside the viewing window to facilitate observation of the specific working status of the insulation protection structure.

[0015] Furthermore, the outer wall of the pressure plate is coated with fluorescent paint, making it easier for staff to observe in poor lighting conditions.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] In this solution, when a daily leak occurs in the switch housing and the protective gas pressure in the switch housing and compensation chamber drops, the high-pressure gas in the compensation chamber will push the sealing ball, causing the sealing ball to separate from the sealing ring. The protective gas in the compensation chamber will then flow into the connecting chamber through the gap between the sealing ring and the sealing ball, compensating for the protective gas in the connecting chamber and the switch housing. After the gas pressure in the connecting chamber and the compensation chamber is balanced, the sealing ball will be reset under the action of the compression spring, ensuring that the protective gas pressure in the switch housing is not too low and does not affect the insulation effect inside the switch housing.

[0018] Meanwhile, a compensation unit is added to the compensation chamber. Utilizing the initial constraint effect of the compensation unit, more protective gas can be filled into the compensation chamber. During subsequent use, when the expanded compensation unit is punctured by the compensation needle, the protective gas in the compensation chamber can be compensated, thus extending the service life of the insulation protection structure. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the GIS high-voltage switch according to the first embodiment of the present invention;

[0020] Figure 2 This is a side sectional view of the GIS high-voltage switch according to the first embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram illustrating the installation process of the GIS high-voltage switch according to the first embodiment of this utility model.

[0022] Figure 4 This is a schematic diagram of the structure of the GIS high-voltage switch according to the second embodiment of the present invention;

[0023] Figure 5 This is a side sectional view of the GIS high-voltage switch according to the second embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram illustrating the changes in the installation and operation process of the GIS high-voltage switch according to the second embodiment of this utility model.

[0025] Explanation of the labels in the diagram:

[0026] 1 Switch housing, 2 Insulation protection structure, 201 Protective bottle, 202 Movable plate, 203 Elastic sealing layer, 204 Protection unit, 205 Hard ring, 206 Sealing ring, 207 Sealing ball, 208 Compression spring, 209 Compensating needle, 210 Connecting hole, 3 One-way valve, 4 Compensating unit, 5 Pressure push plate, 6 Transparent acrylic plate, 7 Connecting needle tube. Detailed Implementation

[0027] The technical solution will now be clearly and completely described with reference to the accompanying drawings in the embodiments of this utility model.

[0028] First implementation method:

[0029] Please see Figures 1-2 A GIS high-voltage switch housing with an insulating protective structure includes a switch housing 1. The lower end of the switch housing 1 is chiseled with a mounting groove. A one-way valve 3 that matches itself is fixedly connected to the bottom of the mounting groove. The one-way valve 3 is connected to a chamber in the switch housing 1 filled with protective gas. The one-way valve 3 has the same structure as a basketball gas valve, which is a well-known technology to those skilled in the art. Therefore, the structure of the one-way valve 3 will not be described in detail here. An insulating protective structure 2 that matches itself is inserted into the mounting groove.

[0030] The insulating protective structure 2 includes a protective bottle 201 threadedly connected to the inner wall of the mounting groove. An elastic sealing layer 203 and a sealing ring 206 are fixedly connected to the inner wall of the protective bottle 201 from top to bottom. The sealing ring 206 divides the protective bottle 201 into a connecting chamber and a compensation chamber. Both the connecting chamber and the compensation chamber are filled with a protective gas with the same atmosphere as the switch housing 1. The connecting chamber is located on the side of the sealing ring 206 close to the elastic sealing layer 203. A sealing ball 207 is placed in the connecting chamber. A rigid ring 205 is fixedly connected to the lower end of the elastic sealing layer 203. A compression spring 208 is fixedly connected between the rigid ring 205 and the sealing ball 207. A movable plate 202 that matches itself is slidably connected to the opening of the protective bottle 201. A connecting needle 7 is inserted into the movable plate 202 and extends through the elastic sealing layer 203 into the connecting chamber.

[0031] Specifically, the structural state of the GIS high-voltage switch housing with insulation protection structure described in this embodiment is the state after installation and in use. Please refer to [link / reference]. Figure 3 When the insulating protective structure 2 is not in use, the movable plate 202 is separated from the elastic sealing layer 203, and the connecting needle 7 does not penetrate the elastic sealing layer 203. At this time, the protective gas stored in the connecting chamber and the compensation chamber is not easy to leak out, so that the insulating protective structure 2 as a whole can be stored and replaced, which facilitates the extension of the effective service time of the switch housing 1.

[0032] During the installation of the insulating protective structure 2, the lower end of the one-way valve 3 will squeeze the movable plate 202, causing the movable plate 202 and the connecting needle tube 7 to move towards the elastic sealing layer 203 until one end of the connecting needle tube 7 is inserted into the one-way valve 3, and the other end of the connecting needle tube 7 penetrates the elastic sealing layer 203 and extends into the connecting chamber, so that the protective gas in the compensation chamber is connected to the protective gas in the switch housing 1. When the switch housing 1 experiences daily leakage and the pressure of the protective gas in the switch housing 1 and the compensation chamber drops, the high-pressure gas in the compensation chamber will push the sealing ball 207, causing the sealing ball 207 to separate from the sealing ring 206. The protective gas in the compensation chamber flows into the connecting chamber from the gap between the sealing ring 206 and the sealing ball 207, compensating for the protective gas in the connecting chamber and the switch housing 1. After the pressure in the connecting chamber and the compensation chamber is balanced, the sealing ball 207 will be reset under the action of the compression spring 208.

[0033] The insulating protection structure 2 of this embodiment protects the switch housing 1, so that the pressure of the protective gas inside the switch housing 1 is not too low and does not affect the insulation effect inside the switch housing 1.

[0034] A protective unit 204 is fixedly connected to the upper end of the movable plate 202. The protective unit 204 covers the outside of the connecting needle tube 7. The protective unit 204 is made of clay material, and the outside of the clay material is covered with a plastic protective film. The protective unit 204 protects the connecting needle tube 7, so that the user is not easily punctured by the connecting needle tube 7 during transportation, etc. The plastic protective film can prevent the clay material from losing too much water, and it is easy to deform continuously under the pressure of the one-way valve 3, which will not affect the normal installation of the insulation protection structure 2.

[0035] In the initial state, the pressure of the protective gas in the connecting chamber is the same as the pressure of the protective gas in the switch housing 1. The pressure of the protective gas in the compensation chamber is 1.2 times that in the connecting chamber, which is used to compensate for the force generated by the deformation of the compression spring 208. After the gas pressure in the switch housing 1 and the connecting chamber changes, compensation can be performed immediately.

[0036] Second implementation method:

[0037] Please see Figures 4-5 The compensation unit 4 is fixedly connected to the compensation chamber of the insulating protective structure 2. The compensation unit is made of elastic airbag. The upper end of the compensation unit 4 is fixedly connected to the pressure push plate 5. The lower end of the sealing ring 206 is fixedly connected to the compensation needle 209. The end of the compensation needle 209 near the sealing ring 206 has multiple connecting holes 210. The pressure push plate 5 has a notch that matches the compensation needle 209. The compensation unit 4 is filled with protective gas at twice the pressure of the connecting chamber.

[0038] Please see Figure 6After the protective gas in the compensation chamber compensates, its internal pressure decreases. At this time, the compensation unit 4 expands in volume under the action of its internal protective gas, compressing the volume of the remaining cavity in the connecting chamber, thereby increasing the gas pressure in the compensation chamber. This makes it less likely for the gas pressure in the compensation chamber to drop significantly after multiple compensations, thus not affecting the protection effect. Due to the constraint effect of the compensation unit 4, the protective gas pressure inside the compensation unit 4 is always greater than the protective gas pressure in the compensation chamber during the expansion process. After the compensation unit 4 comes into contact with the compensation needle 209, the compensation needle 209 punctures the compensation unit 4, connecting the protective gas inside the compensation unit 4 with the compensation chamber, increasing the gas pressure in the compensation chamber, and extending the service life of the insulation protection structure 2.

[0039] A viewing window matching the position of the insulation protection structure 2 is cut into the lower end of the switch housing 1. A transparent acrylic plate 6 is fixedly connected inside the viewing window to facilitate observation of the specific working status of the insulation protection structure 2.

[0040] The outer wall of the pressure push plate 5 is coated with fluorescent paint, which makes it easier for staff to observe in poor lighting conditions.

[0041] Compared to the first embodiment, this embodiment adds a compensation unit 4 to the compensation chamber. The constraint effect of the compensation unit 4 in the early stage allows more protective gas to be filled in the compensation chamber. In subsequent use, after the expanded compensation unit 4 is punctured by the compensation needle 209, the protective gas in the compensation chamber can be compensated, thus extending the service life of the insulation protection structure 2.

[0042] The above description is merely a preferred embodiment of this utility model; it encompasses all the protection scope of this utility model. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be covered within the protection scope of this utility model.

Claims

1. A GIS high-voltage switch housing with an insulating protective structure, comprising a switch housing (1), characterized in that: The lower end of the switch housing (1) is chiseled with a mounting groove, and a one-way valve (3) matching itself is fixedly connected to the bottom of the mounting groove. An insulating protective structure (2) matching itself is inserted into the mounting groove. The insulating protective structure (2) includes a protective bottle (201) threadedly connected to the inner wall of the mounting groove. An elastic sealing layer (203) and a sealing ring (206) are fixedly connected sequentially from top to bottom to the inner wall of the protective bottle (201). The sealing ring (206) divides the protective bottle (201) into a connecting chamber and a compensation chamber. Both the connecting chamber and the compensation chamber are filled with a protective gas identical to the atmosphere inside the switch housing (1). The connecting chamber is located near the elastic sealing layer (203) of the sealing ring (206). On the side, a sealing ball (207) is placed in the connecting chamber, and a hard ring (205) is fixedly connected to the lower end of the elastic sealing layer (203). A compression spring (208) is fixedly connected between the hard ring (205) and the sealing ball (207). A movable plate (202) matching itself is slidably connected to the opening of the protective bottle (201). A connecting needle (7) is inserted into the movable plate (202), and the connecting needle (7) penetrates the elastic sealing layer (203) and extends into the connecting chamber.

2. The GIS high-voltage switch housing with an insulating protective structure according to claim 1, characterized in that: The upper end of the movable plate (202) is fixedly connected to a protective unit (204). The protective unit (204) covers the outside of the connecting needle tube (7). The protective unit (204) is made of clay, and the outside of the clay is covered with a plastic protective film.

3. The GIS high-voltage switch housing with an insulating protective structure according to claim 1, characterized in that: In the initial state, the pressure of the protective gas in the connecting chamber is the same as that of the protective gas in the switch housing (1), and the pressure of the protective gas in the compensation chamber is 1.2-1.5 times that of the connecting chamber.

4. The GIS high-voltage switch housing with an insulating protective structure according to claim 1, characterized in that: The compensation chamber of the insulating protective structure (2) is fixedly connected to a compensation unit (4). The upper end of the compensation unit (4) is fixedly connected to a pressure push plate (5). The lower end of the sealing ring (206) is fixedly connected to a compensation needle (209). The end of the compensation needle (209) near the sealing ring (206) has multiple connecting holes (210). The pressure push plate (5) has a notch that matches the compensation needle (209). The compensation unit (4) is filled with protective gas at 2-3 times the pressure of the connecting chamber.

5. A GIS high-voltage switch housing with an insulating protective structure according to claim 4, characterized in that: The lower end of the switch housing (1) has a viewing window that matches the position of the insulating protective structure (2), and a transparent acrylic plate (6) is fixedly connected inside the viewing window.

6. A GIS high-voltage switch housing with an insulating protective structure according to claim 4, characterized in that: The outer wall of the pressure push plate (5) is coated with fluorescent paint.

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