Environment-friendly gas insulated ring network switch device

Abstract

The application belongs to the technical field of ring network switch equipment, and particularly relates to an environment-friendly gas insulation ring network switch equipment, which comprises a cabinet body, a pressure relief box fixedly connected to the rear side wall of the cabinet body, a partition plate fixedly connected to the inner wall of the pressure relief box, the pressure relief box and the cabinet body being communicated, a pressure relief hole being formed in the side wall of the partition plate, and a pressure relief film being connected to the side wall of the side of the partition plate away from the cabinet body through a mounting ring. When the pressure relief film reaches the set pressure but fails to break by itself, the pressure relief channel can be automatically opened by being actively pierced, high pressure inside the gas chamber is released in time, the cabinet body is prevented from being deformed, exploded and from leaking insulation gas, the hidden danger of equipment damage and personal safety is eliminated, and the operation safety and the fault protection reliability of the ring network cabinet are effectively improved.

Description

Technical Field

[0001] This invention belongs to the technical field of ring network switchgear, and in particular relates to an environmentally friendly gas-insulated ring network switchgear. Background Technology

[0002] Traditional ring network switchgear commonly uses sulfur hexafluoride as the insulating and arc-extinguishing medium. This gas has a strong greenhouse effect and poor environmental performance. At present, the industry widely adopts environmentally friendly gas-insulated ring network switchgear, which replaces sulfur hexafluoride with environmentally friendly media such as dry air, nitrogen, and perfluorinated mixed gases. The equipment seals high-voltage components in a closed gas chamber and relies on environmentally friendly gases to achieve insulation and arc extinguishing. It is green and low-carbon and has been widely used in power distribution networks.

[0003] To prevent internal malfunctions from causing a sudden increase in gas chamber pressure, ring main switchgear is equipped with an explosion-proof pressure relief diaphragm. When the pressure reaches the set value, the diaphragm ruptures to release pressure, ensuring the safety of equipment and personnel. However, during equipment operation, the pressure relief diaphragm may experience pressure exceeding its design value due to factors such as dust accumulation, condensation, assembly compression, uneven stress, and material aging. This malfunction can lead to the inability to release internal high pressure, resulting in cabinet cracking, gas leakage, and insulation deterioration. In severe cases, it can cause cabinet explosion and equipment damage, posing a significant safety hazard.

[0004] Therefore, an environmentally friendly gas-insulated ring network switchgear is proposed to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing an environmentally friendly gas-insulated ring network switchgear.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an environmentally friendly gas-insulated ring main unit, comprising a cabinet, wherein a pressure relief box is fixedly connected to the rear side wall of the cabinet, and further comprising:

[0007] A partition is fixedly connected to the inner wall of the pressure relief box, which is connected to the cabinet. A pressure relief hole is provided on the side wall of the partition. A pressure relief membrane is connected to the side wall of the partition away from the cabinet through an installation ring. The pressure relief membrane and the pressure relief hole are fitted together. An auxiliary component is provided on the side of the partition closer to the cabinet.

[0008] The control room is located on the rear side wall of the cabinet and above the air chamber. The control room is equipped with an air replenishment component.

[0009] The cooling and dehumidifying component is installed in the operating room and can reduce the temperature and humidity in the air chamber.

[0010] Preferably, the auxiliary component includes a bent tube inserted into the side wall of the partition, the rear end of the bent tube passing through the partition and communicating with the outside. A guide tube is inserted into the side wall of the bent tube, and the guide tube and the bent tube are in communication. A piston seat is connected to the front inner wall of the guide tube by a spring. A pointed cone is fixedly connected to the side wall of the piston seat near the pressure relief hole. A support ring is fixedly connected to the inner wall of the bent tube. A piston plate is connected to the inner wall of the support ring by a spring. A limit pin is fixedly connected to the side wall of the piston plate near the pointed cone. A limit groove matching the limit pin is opened on the side wall of the pointed cone. Both the limit pin and the side wall of the piston seat are inclined structures.

[0011] Preferably, the air replenishment assembly includes an air replenishment pipe fixedly inserted into the lower side wall of the operating chamber, the air replenishment pipe communicating with the air chamber, a short pipe fixedly connected to the wall of the air replenishment pipe, a control valve provided inside the short pipe, an air replenishment nozzle connected to the end of the short pipe away from the air replenishment pipe, a horizontal pipe fixedly connected to the wall of the short pipe, a fixed pipe connected to the end of the horizontal pipe away from the short pipe via a threaded connection mechanism, a first electrically controlled one-way valve provided inside both the fixed pipe and the horizontal pipe, and a telescopic cover connected to the end of the fixed pipe away from the horizontal pipe.

[0012] Preferably, a support frame is fixedly connected to the lower inner wall of the operating room, and a trigger switch is fixedly connected to the side wall of the support frame.

[0013] Preferably, the cooling and dehumidifying assembly includes an air pump fixedly connected to the inner wall of the operating chamber. The air pump's inlet end is connected to an air chamber, and the air pump's outlet end is fixedly connected to a cooling hood. The cooling hood contains cooling elements, and the lower side wall of the cooling hood is connected to a cylinder. A geared motor is fixedly connected to the lower side wall of the cylinder, and the output end of the geared motor is located inside the cylinder and fixedly connected to a turntable. Two activated carbon filter cartridges are inserted into the side wall of the turntable. An exhaust pipe is connected to the lower side wall of the cylinder, and the lower end of the exhaust pipe is connected to the air chamber. Both the exhaust pipe and the cooling hood are connected to the corresponding activated carbon filter cartridges through a first compression sealing ring.

[0014] Preferably, the cooling element includes an inlet cylinder and a drain cylinder with an arc-shaped structure disposed inside the cooling hood. Multiple thin pipes are fixedly connected between the inlet cylinder and the drain cylinder. A water tank is fixedly connected to the upper side wall of the cabinet. Multiple semiconductor cooling plates are inserted into the side wall of the water tank. The cooling end of the semiconductor cooling plate is located inside the water tank, and the heat dissipation end extends out of the water tank. A water pump is connected to the side wall of the water tank. The outlet end of the water pump passes through the cabinet and is connected to the inlet cylinder. The drain cylinder is connected to the water tank through a return pipe.

[0015] Preferably, an air pump is fixedly connected to the inner wall of the operating chamber. The air outlet of the air pump is connected to the cylinder, and the air inlet is connected to a heating box. A heating wire is provided in the heating box. An air venting pipe is fixedly inserted into the lower side wall of the cylinder. A second electrically controlled one-way valve is provided in the air venting pipe. The air outlet of the air pump and the air venting pipe are both connected to the corresponding activated carbon filter cartridge through a second compression sealing ring.

[0016] Preferably, a storage cover is fixedly connected to the upper side wall of the cylinder, and a positioning electric push rod is fixedly connected to the upper side wall of the storage cover. The moving end of the positioning electric push rod is located inside the storage cover and is fixedly connected to a lifting plate. Two positioning pins are fixedly connected to the lower side wall of the lifting plate. The side wall of the cylinder has through holes that match the positioning pins. Multiple positioning cylinders that match the positioning pins are fixedly connected to the upper side wall of the turntable.

[0017] Compared with existing technologies, the advantages of an environmentally friendly gas-insulated ring main switchgear are:

[0018] 1. With the help of the auxiliary components, when the pressure relief diaphragm reaches the set pressure but fails to rupture on its own, it can automatically puncture the structure to actively open the pressure relief channel, release the high pressure inside the gas chamber in time, avoid cabinet deformation, cracking and leakage of insulating gas, eliminate equipment damage and personal safety hazards, and effectively improve the operational safety and fault protection reliability of the ring main unit.

[0019] 2. By setting up cooling and dehumidification components, cooling and dehumidification operations are carried out simultaneously during the operation of the ring main unit. This can effectively reduce problems such as insulation degradation, corrosion, short circuits, and accelerated aging of components inside the cabinet due to high temperature and humidity, ensuring stable equipment operation, extending service life, reducing downtime and safety hazards, and improving the overall reliability of the power distribution system.

[0020] 3. With the air replenishment component, the outside air at the pipeline and air replenishment nozzle is automatically emptied when the equipment is replenished with air. This can effectively prevent impurities from entering the ring main unit, prevent the gas purity inside the unit from decreasing and the insulation performance from being damaged, avoid faults such as discharge and corrosion, and ensure the safe and stable operation of the power distribution equipment. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of an environmentally friendly gas-insulated ring network switchgear provided by the present invention;

[0022] Figure 2 This is a schematic diagram showing the positional relationship between the pressure relief box and the partition in an environmentally friendly gas-insulated ring network switchgear provided by the present invention;

[0023] Figure 3 This is a schematic diagram of the surface structure of a partition in an environmentally friendly gas-insulated ring network switchgear provided by the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of an auxiliary component in an environmentally friendly gas-insulated ring network switchgear provided by the present invention;

[0025] Figure 5 This is a schematic diagram of the internal structure of the operating room in an environmentally friendly gas-insulated ring network switchgear provided by the present invention;

[0026] Figure 6 This is a schematic diagram of the gas replenishment component in an environmentally friendly gas-insulated ring network switchgear provided by the present invention;

[0027] Figure 7 This is a schematic diagram of the cooling and dehumidification component in an environmentally friendly gas-insulated ring network switchgear provided by the present invention;

[0028] Figure 8 This is a schematic diagram of the structure of a cooling element in an environmentally friendly gas-insulated ring network switchgear provided by the present invention;

[0029] Figure 9 This is a schematic diagram of the internal structure of the cylinder in an environmentally friendly gas-insulated ring network switchgear provided by the present invention.

[0030] In the diagram: 1 Cabinet, 2 Pressure Relief Box, 3 Partition, 4 Pressure Relief Membrane, 5 Control Room, 6 Auxiliary Components, 61 Bend, 62 Guide Pipe, 7 Piston Seat, 8 Cone, 9 Support Ring, 10 Piston Plate, 11 Limit Pin, 12 Air Injection Component, 121 Air Injection Pipe, 122 Short Pipe, 13 Control Valve, 14 Air Injection Nozzle, 15 Horizontal Pipe, 16 Fixed Pipe, 17 First Electrically Controlled Check Valve, 18 Telescopic Cover, 19 Support Frame, 20 Trigger Switch, 21 Cooling and Dehumidifying Component, 211 Air Pump, 212 Cooling Cover. 22. Cylinder, 23. Gear motor, 24. Turntable, 25. Activated carbon filter cylinder, 26. Exhaust pipe, 27. First compression sealing ring, 28. Cooling element, 281. Water inlet cylinder, 282. Drain cylinder, 29. Thin tube, 30. Water tank, 31. Semiconductor cooling plate, 32. Water pump, 33. Return water pipe, 34. Air pump, 35. Heating box, 36. Vent pipe, 37. Second electrically controlled one-way valve, 38. Second compression sealing ring, 39. Storage cover, 40. Positioning electric push rod, 41. Lifting plate, 42. Positioning pin, 43. Positioning cylinder. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0032] like Figures 1-9 As shown, an environmentally friendly gas-insulated ring main unit includes a cabinet 1, a pressure relief box 2 fixedly connected to the rear side wall of the cabinet 1, and further includes:

[0033] Partition 3 is fixedly connected to the inner wall of pressure relief box 2, which is connected to cabinet 1. Pressure relief holes are provided on the side wall of partition 3. A pressure relief membrane 4 is connected to the side wall of partition 3 away from cabinet 1 via an installation ring. The pressure relief membrane 4 fits into the pressure relief hole. An auxiliary component 6 is provided on the side of partition 3 near cabinet 1. The auxiliary component 6 includes a bent pipe 61 inserted into the side wall of partition 3. The rear end of the bent pipe 61 passes through partition 3 and is connected to the outside. A guide pipe 62 is inserted into the side wall of the bent pipe 61. The guide tube 62 is connected to the bend 61. The inner wall of the front side of the guide tube 62 is connected to the piston seat 7 by a spring. The side wall of the piston seat 7 near the pressure relief hole is fixedly connected to the pointed cone 8. The inner wall of the bend 61 is fixedly connected to the support ring 9. The inner wall of the support ring 9 is connected to the piston plate 10 by a spring. The side wall of the piston plate 10 near the pointed cone 8 is fixedly connected to the limit pin 11. The side wall of the pointed cone 8 is provided with a limit groove that matches the limit pin 11. Both the limit pin 11 and the side wall of the piston seat 7 are inclined structures.

[0034] The operating room 5 is located on the rear side wall of the cabinet 1 and above the air chamber. The operating room 5 is equipped with an air replenishment assembly 12. The air replenishment assembly 12 includes an air replenishment pipe 121 fixedly inserted into the lower side wall of the operating room 5. The air replenishment pipe 121 is connected to the air chamber. The wall of the air replenishment pipe 121 is fixedly connected to a short pipe 122. A control valve 13 is provided in the short pipe 122. An air replenishment nozzle 14 is connected to the end of the short pipe 122 away from the air replenishment pipe 121. A horizontal pipe 15 is fixedly connected to the wall of the short pipe 122. A fixed pipe 16 is connected to the end of the horizontal pipe 15 away from the short pipe 122 through a threaded connection mechanism. A first electrically controlled one-way valve 17 is provided in both the fixed pipe 16 and the horizontal pipe 15. A telescopic cover 18 is connected to the end of the fixed pipe 16 away from the horizontal pipe 15.

[0035] The cooling and dehumidifying component 21 is installed in the operating room 5 and can reduce the temperature and humidity in the air chamber.

[0036] A support frame 19 is fixedly connected to the lower inner wall of the operating chamber 5. A trigger switch 20 is fixedly connected to the side wall of the support frame 19. The cooling and dehumidification assembly 21 includes an air pump 211 fixedly connected to the inner wall of the operating chamber 5. The air inlet of the air pump 211 is connected to the air chamber. The air outlet of the air pump 211 is fixedly connected to a cooling cover 212. A cooling element 28 is provided inside the cooling cover 212. A cylinder 22 is connected to the lower side wall of the cooling cover 212. A geared motor 23 is fixedly connected to the lower side wall of the cylinder 22. The output end of the geared motor 23 is located inside the cylinder 22 and is fixedly connected to a turntable 24. Two activated carbon filter cartridges 25 are inserted into the side wall of the turntable 24. An exhaust pipe 26 is connected to the lower side wall of the cylinder 22. The lower end of the exhaust pipe 26 is connected to the air chamber. The exhaust pipe 26 and the cooling cover 212 are both connected to the corresponding activated carbon filter cartridges 25 through a first compression sealing ring 27.

[0037] The cooling element 28 includes an arc-shaped water inlet cylinder 281 and a drain cylinder 282 disposed inside the cooling cover 212. Multiple thin tubes 29 are fixedly connected between the water inlet cylinder 281 and the drain cylinder 282. A water tank 30 is fixedly connected to the upper side wall of the cabinet 1. Multiple semiconductor cooling plates 31 are inserted into the side wall of the water tank 30. The cooling end of the semiconductor cooling plate 31 is located inside the water tank 30, and the heat dissipation end extends out of the water tank 30. A water pump 32 is connected to the side wall of the water tank 30. The water outlet of the water pump 32 passes through the cabinet 1 and is connected to the water inlet cylinder 281. The drain cylinder 282 is connected to the water tank 30 through a return water pipe 33.

[0038] An air pump 34 is fixedly connected to the inner wall of the operating chamber 5. The air outlet of the air pump 34 is connected to the cylinder 22, and the air inlet is connected to the heating box 35. The heating box 35 is equipped with a heating wire. An air vent pipe 36 is fixedly inserted into the lower side wall of the cylinder 22. A second electrically controlled one-way valve 37 is provided in the air vent pipe 36. The air outlet of the air pump 34 and the air vent pipe 36 are both connected to the corresponding activated carbon filter cartridge 25 through the second compression sealing ring 38.

[0039] A storage cover 39 is fixedly connected to the upper side wall of the cylinder 22. A positioning electric push rod 40 is fixedly connected to the upper side wall of the storage cover 39. The moving end of the positioning electric push rod 40 is located inside the storage cover 39 and is fixedly connected to a lifting plate 41. Two positioning pins 42 are fixedly connected to the lower side wall of the lifting plate 41. The side wall of the cylinder 22 has through holes that match the positioning pins 42. Multiple positioning cylinders 43 that match the positioning pins 42 are fixedly connected to the upper side wall of the turntable 24.

[0040] The operating principle of the present invention is explained as follows: When the internal air pressure of the ring main unit reaches the set threshold, and the pressure relief membrane 4 does not rupture due to dust adhesion, condensation, assembly compression, etc., the air pressure inside the ring main unit's air chamber will continue to rise, and the air pressure on the side of the piston plate 10 inside the bend 61 will increase. Under the push of the air pressure, the piston plate 10 will drive the limiting pin 11 to move away from the cone 8. When the limiting pin 11 is disengaged from the limiting groove on the surface of the cone 8, the piston seat 7 will be pushed by the spring force to drive the cone 8 to be ejected and impact the pressure relief membrane 4, causing the pressure relief membrane 4 to break and the gas inside the air chamber to be discharged.

[0041] When the operator needs to replenish gas in the gas chamber, the operator places the gas outlet of the gas cylinder on the outside of the gas inlet 14, and then opens the valve inside the gas cylinder, allowing the gas in the gas cylinder to be delivered to the telescopic cover 18 through the gas inlet 14, short pipe 122, horizontal pipe 15, fixed pipe 16 and two first electrically controlled one-way valves 17. The gas in the gas cylinder will drive the external gas remaining in the gas inlet 14 and other pipes into the telescopic cover 18, causing the telescopic cover 18 to inflate. When the telescopic cover 18 squeezes the trigger switch 20 during the expansion process, the trigger switch 20 will send an electrical signal to the controller (the controller is located inside the cabinet 1, not shown in the figure). After receiving the signal, the controller will control the two first electrically controlled one-way valves 17 to close and control the control valve 13 to open, so that gas can be replenished in the gas chamber.

[0042] When the controller detects that the internal temperature of cabinet 1 has risen to the set temperature (40℃) via the temperature sensor, the controller will control the air pump 211 to operate. The air pump 211 will extract the gas from the air chamber of cabinet 1 and deliver it to the cooling hood 212. At the same time, the controller will control the semiconductor cooling plate 31 and the water pump 32 to operate. The water pump 32 will deliver the low-temperature liquid in the water tank 30 to the water inlet cylinder 281, and then deliver it to the drain cylinder 282 through multiple thin tubes 29. Subsequently, the liquid will flow back to the water tank 30 through the return water pipe 33. When the high-temperature gas in the air chamber passes through the multiple thin tubes 29, the heat of the gas... The gas is carried away by the liquid and transported to the water tank 30 for cooling, thereby achieving the purpose of cooling. When a small amount of water vapor in the gas encounters the low-temperature capillary tube 29, it will liquefy and then fall into the activated carbon filter cartridge 25 below under the airflow, thus filtering the droplets (the activated carbon filter cartridge 25 has a weak adsorption capacity for gaseous water molecules, is easily saturated and easily undergoes secondary desorption and moisture return, resulting in poor dehumidification effect; when water vapor liquefies into droplets, the activated carbon can efficiently intercept liquid water through capillary action, making dehumidification more stable). The dehumidified gas will be discharged into the gas chamber through the exhaust pipe 26.

[0043] After one activated carbon filter cartridge 25 has been used for a period of time, the controller will control the solenoid valve (not shown in the diagram) inside the suction end of the air pump 211 and the exhaust pipe 26 to close, keeping the air chamber closed. Then, the controller controls the positioning electric push rod 40 to move the lifting plate 41 and positioning pin 42 upwards to the set position. Next, the controller controls the reduction motor 23 to operate, which drives the two activated carbon filter cartridges 25 to rotate 180 degrees via the turntable 24, thus swapping the positions of the two activated carbon filter cartridges 25. Subsequently, the two activated carbon filters... The cylinder 25 is connected to the cooling hood 212 and the exhaust pipe 26 by the compression and cooperation of the first compression sealing ring 27 and the second compression sealing ring 38 on both sides. The used activated carbon filter cylinder 25 is connected to the air outlet of the air pump 34 and the exhaust pipe 36. The controller will control the air pump 34 and the heating wire in the heating box 35 to work for a set time, and simultaneously control the second electronically controlled one-way valve 37 to open, so that the air pump 34 blows the externally heated gas to the used activated carbon filter cylinder 25 with high humidity for drying.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An environmentally friendly gas-insulated ring main switchgear, comprising a cabinet (1), wherein a pressure relief box (2) is fixedly connected to the rear side wall of the cabinet (1), characterized in that, Also includes: A partition (3) is fixedly connected to the inner wall of the pressure relief box (2). The pressure relief box (2) is connected to the cabinet (1). A pressure relief hole is provided on the side wall of the partition (3). A pressure relief membrane (4) is connected to the side wall of the partition (3) away from the cabinet (1) through an installation ring. The pressure relief membrane (4) is in contact with the pressure relief hole. An auxiliary component (6) is provided on the side of the partition (3) close to the cabinet (1). The operating room (5) is located on the rear side wall of the cabinet (1) and above the air chamber. The operating room (5) is equipped with an air replenishment component (12). The cooling and dehumidifying component (21) is installed in the operating room (5) and can reduce the temperature and humidity in the air chamber.

2. The environmentally friendly gas-insulated ring network switchgear according to claim 1, characterized in that, The auxiliary component (6) includes a bent tube (61) inserted into the side wall of the partition (3). The rear end of the bent tube (61) passes through the partition (3) and is connected to the outside. A guide tube (62) is inserted into the side wall of the bent tube (61). The guide tube (62) and the bent tube (61) are connected. A piston seat (7) is connected to the front inner wall of the guide tube (62) by a spring. A pointed cone (8) is fixedly connected to the side wall of the piston seat (7) near the pressure relief hole. A support ring (9) is fixedly connected to the inner wall of the bent tube (61). A piston plate (10) is connected to the inner wall of the support ring (9) by a spring. A limit pin (11) is fixedly connected to the side wall of the piston plate (10) near the pointed cone (8). A limit groove matching the limit pin (11) is opened on the side wall of the pointed cone (8). The limit pin (11) and the side wall of the piston seat (7) are both inclined structures.

3. The environmentally friendly gas-insulated ring network switchgear according to claim 1, characterized in that, The air replenishment assembly (12) includes an air replenishment pipe (121) fixedly inserted into the lower side wall of the operating chamber (5). The air replenishment pipe (121) is connected to the air chamber. A short pipe (122) is fixedly connected to the wall of the air replenishment pipe (121). A control valve (13) is provided in the short pipe (122). An air replenishment nozzle (14) is connected to the end of the short pipe (122) away from the air replenishment pipe (121). A horizontal pipe (15) is fixedly connected to the wall of the short pipe (122). A fixed pipe (16) is connected to the end of the horizontal pipe (15) away from the short pipe (122) through a threaded connection mechanism. A first electrically controlled one-way valve (17) is provided in both the fixed pipe (16) and the horizontal pipe (15). A telescopic cover (18) is connected to the end of the fixed pipe (16) away from the horizontal pipe (15).

4. The environmentally friendly gas-insulated ring main switchgear according to claim 3, characterized in that, The lower inner wall of the operating room (5) is fixedly connected to a support frame (19), and the side wall of the support frame (19) is fixedly connected to a trigger switch (20).

5. The environmentally friendly gas-insulated ring main switchgear according to claim 1, characterized in that, The cooling and dehumidification assembly (21) includes an air pump (211) fixedly connected to the inner wall of the operating chamber (5). The air inlet of the air pump (211) is connected to the air chamber, and the air outlet of the air pump (211) is fixedly connected to a cooling hood (212). The cooling hood (212) is provided with a cooling element (28). The lower side wall of the cooling hood (212) is connected to a cylinder (22), and the lower side wall of the cylinder (22) is fixedly connected to a geared motor (23). The output end of the geared motor (23) is located inside the cylinder (22) and is fixedly connected to a turntable (24). Two activated carbon filter cartridges (25) are inserted into the side wall of the turntable (24). An exhaust pipe (26) is connected to the lower side wall of the cylinder (22). The lower end of the exhaust pipe (26) is connected to the air chamber. The exhaust pipe (26) and the cooling cover (212) are both connected to the corresponding activated carbon filter cartridges (25) through the first compression sealing ring (27).

6. The environmentally friendly gas-insulated ring main switchgear according to claim 5, characterized in that, The cooling element (28) includes an inlet cylinder (281) and a drain cylinder (282) with an arc-shaped structure inside the cooling cover (212). Multiple thin tubes (29) are fixedly connected between the inlet cylinder (281) and the drain cylinder (282). A water tank (30) is fixedly connected to the upper side wall of the cabinet (1). Multiple semiconductor cooling plates (31) are inserted into the side wall of the water tank (30). The cooling end of the semiconductor cooling plate (31) is located inside the water tank (30), and the heat dissipation end extends out of the water tank (30). A water pump (32) is connected to the side wall of the water tank (30). The outlet end of the water pump (32) passes through the cabinet (1) and is connected to the inlet cylinder (281). The drain cylinder (282) is connected to the water tank (30) through the return water pipe (33).

7. The environmentally friendly gas-insulated ring main switchgear according to claim 5, characterized in that, An air pump (34) is fixedly connected to the inner wall of the operating chamber (5). The air outlet of the air pump (34) is connected to the cylinder (22), and the air inlet is connected to the heating box (35). The heating box (35) is equipped with a heating wire. A vent pipe (36) is fixedly inserted into the lower side wall of the cylinder (22). A second electrically controlled one-way valve (37) is provided in the vent pipe (36). The air outlet of the air pump (34) and the vent pipe (36) are both connected to the corresponding activated carbon filter cylinder (25) through a second compression sealing ring (38).

8. The environmentally friendly gas-insulated ring main switchgear according to claim 5, characterized in that, The upper side wall of the cylinder (22) is fixedly connected to a storage cover (39), and the upper side wall of the storage cover (39) is fixedly connected to a positioning electric push rod (40). The moving end of the positioning electric push rod (40) is located inside the storage cover (39) and is fixedly connected to a lifting plate (41). The lower side wall of the lifting plate (41) is fixedly connected to two positioning pins (42). The side wall of the cylinder (22) is provided with through holes that match the positioning pins (42). The upper side wall of the turntable (24) is fixedly connected to multiple positioning cylinders (43) that match the positioning pins (42).

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