Sealing structure for gas insulation switch cabinet
By using a composite sealing structure and pressure regulation system, the problems of easy deformation of the sealing structure and pressure changes in gas-insulated switchgear are solved, achieving stable gas sealing and safe operation.
Patent Information
- Application Number
- CN202422862832.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-23
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-11-23
AI Technical Summary
The sealing structure of existing gas-insulated switchgear is prone to deformation, leading to gas leakage and affecting its service life. Furthermore, the internal pressure of gas-insulated switchgear changes significantly with changes in indoor and outdoor temperatures, posing a safety hazard.
It adopts a composite sealing structure, including an inflation pipe, a pressure relief pipe, and a back pressure pipe. Through the cooperation of springs and rubber blocks, it achieves gas sealing and pressure regulation, and uses a pressure relief tank to recover the depressurized gas and maintain a suitable internal pressure.
It effectively prevents gas leakage, maintains stable internal pressure, improves the service life and safety of the switchgear, and avoids safety hazards caused by pressure changes.
Smart Images
Figure CN223665924U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to switchgear sealing structure technical field especially relates to a sealing structure for gas insulated switchgear. BACKGROUND
[0002] Gas insulated switchgear, abbreviated as GIS, is a kind of switchgear using low pressure SF6 gas, N2 gas or mixed gas as insulation medium, adopting vacuum or SF6 as arc extinguishing medium, and concentrating medium voltage components such as busbar, circuit breaker and disconnecting switch in a box, which is a high-tech product integrating intelligent control, protection, monitoring, measurement and communication by comprehensively using modern insulation technology, breaking technology, manufacturing technology, sensing technology and digital technology. Gas insulated switchgear has the advantages of small size, light weight, good safety, high reliability and adaptability to harsh environmental conditions, and is widely used in urban power grid construction and transformation, rail transit and large industrial and mining enterprises.
[0003] The sealing device of gas insulated switchgear is a key component to ensure its good sealing performance. Common sealing devices include: sealing ring: usually made of elastic materials such as rubber, installed at the interfaces and gaps of switchgear, playing a good sealing role, preventing gas leakage. Sealing gasket: used for sealing between larger contact surfaces, effectively filling gaps to ensure that gas does not escape. Sealing glue: can fill and seal some fine gaps, enhancing the overall sealing effect. Sealing flange: through fastening connection, ensuring the close fit between flange surfaces, achieving reliable sealing. These sealing devices are crucial, as they ensure the stability and purity of the insulation gas inside the switchgear, maintaining the normal operation and safety performance of the equipment. If the sealing device fails, it may cause gas leakage, affecting the insulation performance and operational reliability of the switchgear, and even causing safety accidents. Therefore, there are high requirements for the quality and maintenance of the sealing device.
[0004] The sealing method of existing switchgear usually uses extruded O-shaped sealing ring to seal the cabinet body and cabinet door, but this sealing method is relatively simple, with poor sealing effect, and the O-shaped sealing ring may deform after long-term extrusion, causing gas leakage and affecting the service life of the switchgear. When the gas insulated switchgear is in use, changes in indoor and outdoor temperature may cause excessive changes in internal pressure, which may cause explosion hazards to the switchgear. UTILITY MODEL CONTENTS
[0005] To make up for the above shortcomings, the utility model provides a sealing structure for gas insulated switchgear, aiming to improve the problem of deformation of extruded O-shaped sealing ring in the sealing structure of switchgear in the prior art, which may cause gas leakage and affect the service life, and the problem of large changes in internal pressure of gas insulated switchgear due to changes in indoor and outdoor temperature.
[0006] In order to achieve the above object, the utility model discloses the following technical scheme: a kind of sealing structure for gas insulated switchgear, including cabinet, the right side middle part of the cabinet is fixedly connected with inflation pipe, the inside middle part of the inflation pipe is fixedly connected with fixed frame, the inside middle part of the fixed frame is slidably connected with reset rod, the right end middle part of the reset rod is fixedly connected with top cone, the left end middle part of the reset rod is fixedly connected with baffle, the right end middle part of the baffle is fixedly connected with rubber cone block, inflation spring is sleeved in the outside right end of the reset rod, the left end front middle part of the inside of the cabinet is fixedly connected with pressure relief pipe, the inside middle part of the pressure relief pipe is fixedly connected with pressure relief support, the inside middle part of the pressure relief support is slidably connected with exhaust rod, the right end middle part of the exhaust rod is fixedly connected with pressure relief top block, the right end middle part of the exhaust rod is fixedly connected with exhaust cone block, pressure relief spring is sleeved in the outside right end of the exhaust rod, the left end front middle part of the cabinet is fixedly connected with exhaust pipe, the left end rear middle part of the cabinet is fixedly connected with back pressure pipe, the inside middle part of the back pressure pipe is fixedly connected with back pressure support, the inside middle part of the back pressure support is slidably connected with back pressure rod, the left end middle part of the back pressure rod is fixedly connected with back pressure top block, back pressure spring is sleeved in the outside left end of the back pressure rod, the right end middle part of the back pressure rod is fixedly connected with back pressure cone block, communication pipe is fixedly connected between the exhaust pipe and back pressure pipe, the outside middle part top of the communication pipe is fixedly connected with pressure relief tank, the inside of the pressure relief tank is slidably connected with piston, the middle part of the top of the piston is fixedly connected with push rod, the middle part of the top of the push rod is fixedly connected with pressure disc.
[0007] As further description of the above technical solution: the front end of the cabinet is hingedly connected with cabinet door, and the right side of the front end of the cabinet door is fixedly connected with handle.
[0008] As further description of the above technical solution:
[0009] The middle part of the outside of the inflation pipe and the outside of the reset rod is provided with a threaded groove, and the inside of the fixed frame is provided with a threaded groove.
[0010] As further description of the above technical solution:
[0011] The fixed frame, pressure relief support, back pressure support and exhaust cone block are equidistantly provided with air holes at the right end of the outer ring.
[0012] As further description of the above technical solution:
[0013] The right end middle part of the top cone is provided with a hexagonal wrench groove.
[0014] As further description of the above technical solution:
[0015] The outside right end of the pressure relief tank is fixedly connected with pressure relief frame.
[0016] As further description of the above technical solution:
[0017] The right middle part of the cabinet body is provided with an inflation hole, the front middle part of the left end of the cabinet body is provided with a pressure relief hole, and the rear middle part of the left end of the cabinet body is provided with a back pressure hole.
[0018] Further description of the above technical solutions:
[0019] The top end of the pressure relief tank is provided with a fixing hole, and the middle part of the right end of the rubber block is provided with a fixing hole.
[0020] The utility model has the advantages of the following beneficial effects:
[0021] 1. In the utility model, the insulation gas is sealed in the gas insulation switch cabinet under the extrusion of the spring rubber block on the compression rod, and at the same time, the pressure spring is used to push and prevent leakage during the addition of the insulation gas.
[0022] 2. In the utility model, the pressure relief block is extruded by the reset spring, so that the air pressure in the switch cabinet is kept at a proper pressure, and at the same time, the insulation gas is recovered through the pressure relief valve of the pressure relief tank, and the recovered insulation gas is re-injected into the switch cabinet through the pressure relief rod to keep the pressure. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 A perspective view of a sealing structure for a gas insulation switch cabinet is provided for the utility model;
[0024] Figure 2 An explosion structure schematic view of an inflation pipe of a sealing structure for a gas insulation switch cabinet is provided for the utility model;
[0025] Figure 3 An explosion structure schematic view of a pressure relief device of a sealing structure for a gas insulation switch cabinet is provided for the utility model.
[0026] LEGEND:
[0027] 1. switch cabinet; 2. cabinet door; 3. inflation pipe; 4. baffle; 5. rubber block; 6. fixing frame; 7. inflation spring; 8. reset rod; 9. top cone; 10. pressure relief pipe; 11. pressure relief support; 12. pressure relief spring; 13. pressure relief top block; 14. exhaust cone block; 15. exhaust pipe; 16. communication pipe; 17. back pressure pipe; 18. back pressure top block; 19. back pressure spring; 20. back pressure support; 21. back pressure cone block; 22. pressure relief tank; 23. pressure relief frame; 24. piston; 25. push rod; 26. pressure plate; 27. exhaust rod; 28. back pressure rod. DETAILED DESCRIPTION
[0028] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.
[0029] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. Figures 1-2 The utility model provides a kind of sealing structure for gas insulated switchgear, including cabinet 1, the right side middle part of cabinet 1 is fixedly connected with inflation pipe 3, the inside middle part of inflation pipe 3 is fixedly connected with fixed frame 6, the inside middle part of fixed frame 6 is slidably connected with reset rod 8, the right end middle part of reset rod 8 is fixedly connected with top cone 9, the left end middle part of reset rod 8 is fixedly connected with baffle 4, the right end middle part of baffle 4 is fixedly connected with rubber cone block 5, inflation spring 7 is sleeved in the right end outside of reset rod 8, hexagonal wrench groove is set in the right end middle part of top cone 9, worker carries out switchgear when inflating, present top cone 9 in inflation pipe 3 is loosened by hexagonal wrench, then inflation communication pipe is screwed on the screw thread on inflation pipe 3, inflation pump is inflated to inflation pipe 3, rubber cone block 5 on baffle 4 is opened by air pressure, when insulating gas is added in cabinet 1, exit inflation communication pipe, baffle 4 is rebounded under inflation spring 7, make reset rod 8 drive rubber cone block 5 to block the air hole on cabinet 1, then using hexagonal wrench is tightened top cone 9, so that rubber cone block 5 can completely seal air hole.
[0030] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. Figure 1 And Figure 3The left end of the inside of the cabinet 1 is fixedly connected with a pressure relief pipe 10, the middle of the inside of the pressure relief pipe 10 is fixedly connected with a pressure relief support 11, the middle of the inside of the pressure relief support 11 is slidably connected with an exhaust rod 27, the middle of the right end of the exhaust rod 27 is fixedly connected with a pressure relief top block 13, the middle of the right end of the exhaust rod 27 is fixedly connected with an exhaust cone block 14, the right end of the outside of the exhaust rod 27 is sleeved with a pressure relief spring 12, the middle of the left end of the front side of the cabinet 1 is fixedly connected with an exhaust pipe 15, the middle of the left end of the back side of the cabinet 1 is fixedly connected with a back pressure pipe 17, the middle of the inside of the back pressure pipe 17 is fixedly connected with a back pressure support 20, the middle of the inside of the back pressure support 20 is slidably connected with a back pressure rod 28, the middle of the left end of the back pressure rod 28 is fixedly connected with a back pressure top block 18, the left end of the outside of the back pressure rod 28 is sleeved with a back pressure spring 19, the middle of the right end of the back pressure rod 28 is fixedly connected with a back pressure cone block 21, the exhaust pipe 15 and the back pressure pipe 17 are fixedly connected with a communication pipe 16, the middle of the top of the outside of the communication pipe 16 is fixedly connected with a pressure relief tank 22, the inside of the pressure relief tank 22 is slidably connected with a piston 24, the middle of the top of the piston 24 is fixedly connected with a push rod 25, the middle of the top of the push rod 25 is fixedly connected with a pressure disc 26, when the temperature inside and outside changes, the air pressure in the cabinet 1 increases, the high air pressure promotes the insulating gas to push the exhaust cone block 14, the gas is discharged from the cabinet 1, the pressure in the cabinet 1 is maintained, then under the rebound of the pressure relief spring 12, the exhaust cone block 14 closes the exhaust hole, the insulating gas discharged from the pressure relief tank 22 is gathered in the pressure relief tank 22, when the pressure in the cabinet 1 decreases, the pressure disc 26 is pressed, the pressure disc 26 promotes the piston 24 on the push rod 25 to push the insulating gas in the pressure relief tank 22 through the back pressure pipe 17 to the cabinet 1.
[0031] Referring to Figures 1-3 The front end of the cabinet 1 is hingedly connected with a cabinet door 2, the right side of the front end of the cabinet door 2 is fixedly connected with a handle, the outside of the middle of the inflation pipe 3 and the outside of the middle of the reset rod 8 is provided with a threaded groove, the inside of the fixed frame 6 is provided with a threaded groove, the right end of the outside of the fixed frame 6, the pressure relief support 11, the back pressure support 20 and the exhaust cone block 14 is provided with an air hole at equal intervals, the right end of the outside of the pressure relief tank 22 is fixedly connected with a pressure relief frame 23, the middle of the right side of the cabinet 1 is provided with an inflation hole, the middle of the left end of the front side of the cabinet 1 is provided with a pressure relief hole, the middle of the left end of the back side of the cabinet 1 is provided with a back pressure hole, the top of the pressure relief tank 22 is provided with a fixed hole, the middle of the right end of the rubber cone block 5 is provided with a fixed hole.
[0032] Working principle: when the worker inflates the switch cabinet, the top cone 9 in the inflation pipe 3 is loosened by using the hexagonal wrench, then the inflation communication pipe is screwed on the screw thread on the inflation pipe 3, the inflation pump inflates the inflation pipe 3, the air pressure pushes the rubber cone block 5 on the baffle 4 to open, when the insulation gas is added in the cabinet 1, the inflation communication pipe is withdrawn, the baffle 4 is rebounded under the inflation spring 7, the reset rod 8 drives the rubber cone block 5 to block the air hole on the cabinet 1, then the hexagonal wrench is used to tighten the top cone 9, so that the rubber cone block 5 can completely seal the air hole, then when the internal and external temperature changes, the air pressure in the cabinet 1 increases, the high air pressure drives the exhaust cone block 14 to exhaust the gas in the cabinet 1, keeps the pressure in the cabinet 1, then under the rebound of the pressure relief spring 12, the exhaust cone block 14 blocks the exhaust hole, the insulation gas discharged by pressure relief is gathered in the pressure relief tank 22, when the pressure in the cabinet 1 decreases, the pressure plate 26 is pressed, the pressure plate 26 drives the piston 24 on the push rod 25 to push the insulation gas in the pressure relief tank 22 back to the cabinet 1 through the back pressure pipe 17.
[0033] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing detailed description of the present application, for the skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included in the scope of the present application.
Claims
1. A sealing structure for a gas-insulated switchgear, comprising a cabinet (1), characterized in that: The right side middle part of the cabinet body (1) is fixedly connected with an inflation pipe (3), the inner side middle part of the inflation pipe (3) is fixedly connected with a fixing frame (6), the inner side middle part of the fixing frame (6) is slidably connected with a reset rod (8), the right end middle part of the reset rod (8) is fixedly connected with a top cone (9), the left end middle part of the reset rod (8) is fixedly connected with a baffle (4), the right end middle part of the baffle (4) is fixedly connected with a rubber cone block (5), the outer side right end of the reset rod (8) is sleeved with an inflation spring (7), the inner side left end front side middle part of the cabinet body (1) is fixedly connected with a pressure relief pipe (10), the inner side middle part of the pressure relief pipe (10) is fixedly connected with a pressure relief support (11), the inner side middle part of the pressure relief support (11) is slidably connected with an exhaust rod (27), the right end middle part of the exhaust rod (27) is fixedly connected with a pressure relief top block (13), the right end middle part of the exhaust rod (27) is fixedly connected with an exhaust cone block (14), the outer side right end of the exhaust rod (27) is sleeved with a pressure relief spring (12), the left end front side middle part of the cabinet body (1) is fixedly connected with an exhaust pipe (15), the left end rear side middle part of the cabinet body (1) is fixedly connected with a back pressure pipe (17), the inner side middle part of the back pressure pipe (17) is fixedly connected with a back pressure support (20), the inner side middle part of the back pressure support (20) is slidably connected with a back pressure rod (28), the left end middle part of the back pressure rod (28) is fixedly connected with a back pressure top block (18), the outer side left end of the back pressure rod (28) is sleeved with a back pressure spring (19), the right end middle part of the back pressure rod (28) is fixedly connected with a back pressure cone block (21), the exhaust pipe (15) and the back pressure pipe (17) are fixedly connected with a communication pipe (16), the outer side middle part top end of the communication pipe (16) is fixedly connected with a pressure relief tank (22), the inner side of the pressure relief tank (22) is slidably connected with a piston (24), the top end middle part of the piston (24) is fixedly connected with a push rod (25), the top end middle part of the push rod (25) is fixedly connected with a pressure disc (26).
2. The sealing structure for a gas insulated switchgear according to claim 1, characterized in that: The front end of the cabinet body (1) is hingedly connected with a cabinet door (2), the front end right side of the cabinet door (2) is fixedly connected with a handle.
3. The sealing structure for a gas insulated switchgear according to claim 1, characterized in that: The outer side of the inflation pipe (3) and the outer side middle part of the reset rod (8) are provided with threaded grooves, the inner side of the fixing frame (6) is provided with a threaded groove.
4. The sealing structure for a gas insulated switchgear according to claim 1, characterized in that: The right end outer circle of the fixing frame (6), the pressure relief support (11), the back pressure support (20) and the exhaust cone block (14) are equally provided with air holes.
5. The sealing structure for a gas insulated switchgear according to claim 1, characterized in that: The right end middle part of the top cone (9) is provided with a hexagonal wrench groove.
6. The sealing structure for a gas insulated switchgear according to claim 1, characterized in that: The outer side right end of the pressure relief tank (22) is fixedly connected with a pressure relief frame (23).
7. The sealing structure for a gas insulated switchgear according to claim 1, characterized in that: The right side middle part of the cabinet body (1) is provided with an inflation hole, the left end front side middle part of the cabinet body (1) is provided with a pressure relief hole, and the left end rear side middle part of the cabinet body (1) is provided with a back pressure hole.
8. The sealing structure for a gas insulated switchgear according to claim 1, characterized in that: The top end of the pressure relief tank (22) is provided with a fixing hole, and the right end middle part of the rubber cone block (5) is provided with a fixing hole.