High and low voltage cabinet of high altitude insulation gas sealed cabin

Abstract

The application relates to the technical field of high-low voltage cabinets, and discloses a high-low voltage cabinet with an insulating gas sealed cabin for high altitudes, which solves the problem of poor heat dissipation effect of the existing high-low voltage cabinet with insulating gas for high altitudes, and comprises a cabinet body, a door body arranged on the front of the cabinet body, electrical equipment arranged in the cabinet body, a sealing ring arranged on the side of the front of the cabinet body, an air flow circulation heat dissipation mechanism, a gas supplement mechanism and a gas supply mechanism arranged on one side of the cabinet body, sulfur hexafluoride gas filled in the air flow circulation heat dissipation mechanism and the gas supplement mechanism, a gas supply inner cavity and a plurality of through holes formed in the bottom of the cabinet body, the through holes being communicated with the gas supply inner cavity, and a circulating fan fixedly arranged in the through holes, the air flow circulation heat dissipation mechanism being composed of an L-shaped exhaust elbow, a vertical air guide pipe one, a vertical air guide pipe two, a plurality of serpentine flat pipes, an L-shaped air inlet elbow and a plurality of heat dissipation heat pipes; through the high-low voltage cabinet, the safety can be improved by filling with insulating gas, and the high-low voltage cabinet has good heat dissipation effect and sealing effect.

Description

Technical Field

[0001] This invention belongs to the field of high and low voltage switchgear technology, specifically a high and low voltage switchgear with an insulating gas-sealed chamber for high altitude applications. Background Technology

[0002] High and low voltage switchgear is a type of electrical equipment. External lines first enter the main control switch inside the cabinet, and then enter the branch control switches. Each branch circuit is configured according to its needs, such as instruments, automatic control, motor magnetic switches, and various AC contactors.

[0003] In high-altitude areas, air density decreases significantly with increasing altitude, leading to a decrease in the breakdown field strength of air as a natural insulating medium (for example, the air insulation strength at an altitude of 4000 meters is about 60% of that at sea level), which can easily cause discharge or flashover faults. Therefore, high- and low-voltage switchgear used in high-altitude areas is usually filled with insulating gas, which can also improve the arc extinguishing effect. However, the insulating gas inside existing high- and low-voltage switchgear used at high altitudes is easily affected by the electrical equipment inside the switchgear, resulting in a high temperature that cannot dissipate heat, affecting the stability and service life of the switchgear. Therefore, this application proposes a high- and low-voltage switchgear with an insulating gas-sealed chamber for high-altitude applications. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the present invention provides a high and low voltage switchgear with an insulating gas sealed chamber for high altitudes, which effectively solves the problem of poor heat dissipation of insulating gas in existing high and low voltage switchgear for high altitudes.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high and low voltage switchgear for an insulating gas-sealed chamber at high altitudes, comprising a cabinet body, a door on the front of the cabinet body, electrical equipment inside the cabinet body, a controller fixedly installed at the bottom of one side of the cabinet body, a sealing ring fixedly installed on the side of the front of the cabinet body, an airflow circulation and heat dissipation mechanism, a gas replenishment mechanism, and a gas supply mechanism fixedly installed on one side of the cabinet body, the gas replenishment mechanism and the gas supply mechanism are both filled with sulfur hexafluoride gas, and a gas supply cavity and several through holes are opened at the bottom of the cabinet body, which are connected to the airflow circulation and heat dissipation mechanism. The through holes are connected to the gas supply cavity, and a circulating fan is fixedly installed inside the through holes.

[0006] The airflow circulation and heat dissipation mechanism consists of an L-shaped exhaust bend, a vertical air guide pipe 1, a vertical air guide pipe 2, several serpentine flat pipes, an L-shaped air intake bend, and several heat dissipation pipes. The L-shaped exhaust bend is connected to the top of one side of the cabinet. The vertical air guide pipe 1 is fixedly connected to the bottom of the L-shaped exhaust bend. The serpentine flat pipes are fixedly connected to the bottom of the vertical air guide pipe 1. The vertical air guide pipe 2 is fixedly connected to the bottom of the serpentine flat pipes. The L-shaped air intake bend is connected to the bottom of the cabinet near the L-shaped exhaust bend and is fixedly connected to the vertical air guide pipe 2. The other end of the L-shaped air intake bend is connected to the air supply cavity. The heat dissipation pipes are connected to one side of the vertical air guide pipe 1.

[0007] Preferably, a temperature sensor and a pressure sensor are fixedly installed on the top of one side of the cabinet, and a pressure sensor and a pressure relief valve are fixedly installed on the top of the side of the cabinet near the airflow circulation and heat dissipation mechanism.

[0008] Preferably, both the gas replenishment mechanism and the gas supply mechanism consist of a gas tank, several support sleeves, a gas supply pipe, a pressure gauge, and a solenoid valve. The gas tank is fixedly connected to one side of the cabinet through the support sleeves, the gas supply pipe is fixedly connected to the bottom of the gas tank and communicates with the inside of the cabinet, the pressure gauge is connected to the side of the gas tank, and the solenoid valve is connected to the gas supply pipe.

[0009] Preferably, the bottom end of the heat pipe extends into the interior of the vertical air duct and the cabinet, and a number of heat dissipation fins are fixedly installed on the top of the side of the heat pipe, and a guide fan is fixedly installed at the top of the interior of the vertical air duct.

[0010] Preferably, a plurality of cooling fans 1 that match the heat pipe are fixedly installed at the top of one side of the vertical air guide pipe 1, a plurality of cooling fans 2 that match the serpentine flat tube are fixedly installed at the bottom of one side of the vertical air guide pipe 2, and a plurality of cooling fans 3 are fixedly installed at the middle position of one side of the serpentine flat tube.

[0011] Preferably, an extension plate is fixedly installed at the top of the cabinet near the airflow circulation and heat dissipation mechanism, and a breathable mesh cover connected to the cabinet is fixedly installed at the bottom of the extension plate.

[0012] Preferably, the cabinet has an isolation cavity, and the interior of the isolation cavity is filled with heat-insulating filler.

[0013] Preferably, the door body has an internal isolation cavity II, which is filled with heat insulation filler II.

[0014] Preferably, the sealing ring has an internal air pressure chamber, and the air pressure chamber has a connecting groove one on the side near the cabinet body. The connecting groove one communicates with the interior of the cabinet body, and the side of the interior of the cabinet body has several connecting grooves two that communicate with the connecting groove one.

[0015] Preferably, a magnetic stripe 1 is fixedly installed on one side of the pneumatic chamber, and a magnetic stripe 2 is fixedly installed on the other side of the pneumatic chamber. The magnetic stripe 2 has several connecting grooves 3 that communicate with the connecting groove 1, and several springs are fixedly installed between the magnetic stripe 1 and the magnetic stripe 2.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] (1) In operation, by setting up a gas replenishment mechanism and a gas supply mechanism consisting of a gas tank, several support sleeves, a gas supply pipe, a pressure gauge and a solenoid valve, and filling the inside of the gas replenishment mechanism and the gas supply mechanism with sulfur hexafluoride gas, the gas supply mechanism can be controlled to open after the high and low voltage switch is closed. The gas supply mechanism can fill the inside of the high and low voltage switch with sulfur hexafluoride gas, so that the inside of the high and low voltage switch is in a slightly positive pressure state. The slightly positive pressure state can improve the sealing effect and prevent the intrusion of external humid air, dust and corrosive gases. The sulfur hexafluoride gas can improve the insulation strength and prevent discharge and flashover faults. It also has an arc extinguishing function.

[0018] (2) By setting up an air supply cavity, through holes, and a circulating fan, as well as an airflow circulation and heat dissipation mechanism consisting of an L-shaped exhaust bend, a vertical air guide pipe one, a vertical air guide pipe two, several serpentine flat pipes, an L-shaped air inlet bend, and several heat dissipation heat pipes, the sulfur hexafluoride gas can form an internal circulation inside the high and low voltage switchgear. During the internal circulation process, heat exchange with the external air is achieved, thereby dissipating the sulfur hexafluoride gas. The dissipated sulfur hexafluoride gas achieves continuous airflow heat dissipation inside the high and low voltage switchgear, ensuring the normal operation of the high and low voltage switchgear and improving its service life. By setting up heat dissipation heat pipes, serpentine flat pipes, heat dissipation fan one, heat dissipation fan two, and heat dissipation fan three, the heat dissipation efficiency can be improved.

[0019] (3) By setting up an isolation cavity one, a heat insulation filler one, an isolation cavity two and a heat insulation filler two, the heat insulation effect can be achieved, and the damage to the electronic equipment inside the high and low voltage cabinet can be avoided in extremely cold weather.

[0020] (4) By setting up an air pressure chamber, connecting groove one, connecting groove two, magnetic strip one, magnetic strip two, connecting groove three and spring, the tightness of the sealing ring with the cabinet and door can be improved, thereby improving the sealing performance of the cabinet and door connection. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0022] In the attached diagram:

[0023] Figure 1This is one of the schematic diagrams of the high and low voltage switchgear structure of the insulating gas-sealed chamber for high altitude use in this invention;

[0024] Figure 2 This is the second schematic diagram of the high and low voltage switchgear structure of the insulating gas-sealed chamber for high altitude applications of the present invention;

[0025] Figure 3 This is a schematic diagram of the air replenishment mechanism of the present invention;

[0026] Figure 4 This is a schematic diagram of the airflow circulation heat dissipation mechanism of the present invention;

[0027] Figure 5 This is a partial structural diagram of the airflow circulation heat dissipation mechanism of the present invention;

[0028] Figure 6 This is a schematic diagram of the sealing ring structure of the present invention;

[0029] Figure 7 This is a partial structural diagram of the sealing ring of the present invention;

[0030] In the diagram: 1. Cabinet; 2. Door; 3. Electrical equipment; 4. Controller; 5. Sealing ring; 6. Airflow circulation and heat dissipation mechanism; 7. Air replenishment mechanism; 8. Air supply mechanism; 9. Air supply cavity; 10. Through hole; 11. Circulating fan; 12. L-shaped exhaust bend; 13. Vertical air guide pipe one; 14. Vertical air guide pipe two; 15. Snake-shaped flat pipe; 16. L-shaped air inlet bend; 17. Heat pipe; 18. Temperature sensor; 19. Pressure sensor one; 20. Pressure sensor two; 21. Pressure relief valve; 22. Gas tank. 23. Support sleeve; 24. Air supply pipe; 25. Pressure gauge; 26. Solenoid valve; 27. Heat dissipation fins; 28. Guide fan; 29. ​​Heat dissipation fan one; 30. Heat dissipation fan two; 31. Heat dissipation fan three; 32. Extension plate; 33. Breathable mesh cover; 34. Isolation cavity one; 35. Thermal insulation filler one; 36. Isolation cavity two; 37. Thermal insulation filler two; 38. Air pressure chamber; 39. Connecting groove one; 40. Connecting groove two; 41. Magnetic strip one; 42. Magnetic strip two; 43. Connecting groove three; 44. Spring. 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] Implementation examples, by Figures 1 to 7The present invention provides a high and low voltage switchgear for an insulating gas-sealed chamber for high altitudes, comprising a cabinet body 1, a door 2 on the front of the cabinet body 1, electrical equipment 3 inside the cabinet body 1, a controller 4 fixedly mounted on the bottom of one side inside the cabinet body 1, a sealing ring 5 fixedly mounted on the side of the front of the cabinet body 1, an airflow circulation and heat dissipation mechanism 6, an air replenishment mechanism 7, and an air supply mechanism 8 fixedly mounted on one side of the cabinet body 1, the air replenishment mechanism 7 and the air supply mechanism 8 being filled with sulfur hexafluoride gas, and an air supply cavity 9 communicating with the airflow circulation and heat dissipation mechanism 6 and several through holes 10 at the bottom of the cabinet body 1, the through holes 10 communicating with the air supply cavity 9, and a circulating fan 11 fixedly mounted inside the through holes 10;

[0033] In use, the gas replenishment mechanism 7 and the gas supply mechanism 8 are pre-filled with compressed sulfur hexafluoride gas. After the high and low voltage switchgear is installed and the door 2 is closed to the cabinet 1, the gas supply mechanism 8 is opened to connect the gas supply mechanism 8 to the inside of the cabinet 1 and to fill the cabinet 1 with sulfur hexafluoride gas, so that the inside of the cabinet 1 is in a slightly positive pressure state. The sulfur hexafluoride gas improves the insulation and sealing of the inside of the cabinet 1. If the inside of the cabinet 1 leaks later, the gas replenishment mechanism 7 will replenish the sulfur hexafluoride gas. The sealing ring 5 can improve the sealing of the connection between the door 2 and the cabinet 1. The circulating fan 11 and the airflow circulation and heat dissipation mechanism 6 can drive the sulfur hexafluoride gas inside the cabinet 1 to circulate and achieve heat exchange with the outside air, thereby achieving heat dissipation.

[0034] The airflow circulation heat dissipation mechanism 6 consists of an L-shaped exhaust bend 12, a vertical air guide pipe 13, a vertical air guide pipe 2 14, several serpentine flat pipes 15, an L-shaped air intake bend 16, and several heat dissipation pipes 17. The L-shaped exhaust bend 12 is connected to the top of one side of the cabinet 1. The vertical air guide pipe 13 is fixedly connected to the bottom of the L-shaped exhaust bend 12. The serpentine flat pipe 15 is fixedly connected to the bottom of the vertical air guide pipe 13. The vertical air guide pipe 2 14 is fixedly connected to the bottom of the serpentine flat pipe 15. The L-shaped air intake bend 16 is connected to the bottom of the cabinet 1 near the L-shaped exhaust bend 12 and is fixedly connected to the vertical air guide pipe 2 14. The other end of the L-shaped air intake bend 16 is connected to the air supply cavity 9. The heat dissipation pipes 17 are connected to one side of the vertical air guide pipe 13.

[0035] When the airflow circulation heat dissipation mechanism 6 is working, sulfur hexafluoride gas flows through the L-shaped exhaust bend 12, vertical air guide pipe one 13, vertical air guide pipe two 14, several serpentine flat pipes 15, L-shaped air inlet bend 16, and several heat dissipation pipes 17. The multiple serpentine flat pipes 15 can increase the contact area with the external air, thereby improving the heat dissipation effect. The heat dissipation pipes 17 achieve self-heating, which reduces the temperature of the sulfur hexafluoride gas. The sulfur hexafluoride gas circulates inside the cabinet 1, thereby achieving efficient heat dissipation of the equipment inside the cabinet 1.

[0036] A temperature sensor 18 and a pressure sensor 19 are fixedly installed on the top of one side of the cabinet 1. A pressure sensor 20 and a pressure relief valve 21 are fixedly installed on the top of the side of the cabinet 1 near the airflow circulation heat dissipation mechanism 6.

[0037] Temperature sensor 18 and pressure sensor 19 can monitor the temperature and pressure inside cabinet 1, pressure sensor 20 can monitor the external atmospheric pressure, and pressure relief valve 21 can automatically relieve pressure when the pressure inside cabinet 1 is too high.

[0038] Both the gas replenishment mechanism 7 and the gas supply mechanism 8 consist of a gas tank 22, several support sleeves 23, a gas supply pipe 24, a pressure gauge 25, and a solenoid valve 26. The gas tank 22 is fixedly connected to one side of the cabinet 1 through the support sleeves 23. The gas supply pipe 24 is fixedly connected to the bottom of the gas tank 22 and communicates with the inside of the cabinet 1. The pressure gauge 25 is connected to the side of the gas tank 22, and the solenoid valve 26 is connected to the gas supply pipe 24.

[0039] The gas tank 22 stores sulfur hexafluoride gas, the gas supply pipe 24 supplies gas, the pressure gauge 25 displays the gas pressure, and the solenoid valve 26 controls the gas flow.

[0040] The bottom end of the heat pipe 17 extends into the interior of the vertical air duct 13 and the cabinet 1. Several heat dissipation fins 27 are fixedly installed on the top of the side of the heat pipe 17, and a guide fan 28 is fixedly installed at the top of the interior of the vertical air duct 13.

[0041] The heat sink fins 27 can improve heat dissipation efficiency, and the airflow fan 28 can accelerate the flow of sulfur hexafluoride gas.

[0042] Several cooling fans 29 that match the heat pipe 17 are fixedly installed at the top of one side of the vertical air guide pipe 13. Several cooling fans 30 that match the serpentine flat tube 15 are fixedly installed at the bottom of one side of the vertical air guide pipe 14. Several cooling fans 31 are fixedly installed in the middle of one side of the serpentine flat tube 15.

[0043] The cooling efficiency can be further improved by cooling fan 1 29, cooling fan 2 30 and cooling fan 3 31;

[0044] An extension plate 32 is fixedly installed at the top of the cabinet 1 near the airflow circulation and heat dissipation mechanism 6. A breathable mesh cover 33 connected to the cabinet 1 is fixedly installed at the bottom of the extension plate 32, which can improve the protection and the breathability.

[0045] The cabinet 1 has an isolation cavity 34, which is filled with heat insulation filler 35. The door 2 has an isolation cavity 36, which is filled with heat insulation filler 37. This can achieve the effect of heat insulation and prevent the high and low voltage cabinet from being affected by the extremely cold weather in high-altitude areas.

[0046] The sealing ring 5 has an internal air pressure chamber 38. The air pressure chamber 38 has a connecting groove 39 on the side near the cabinet 1. The connecting groove 39 communicates with the inside of the cabinet 1. The side of the inside of the cabinet 1 has several connecting grooves 40 that communicate with the connecting groove 39. A magnetic strip 41 is fixedly installed on one side of the inside of the air pressure chamber 38. A magnetic strip 42 is fixedly installed on the other side of the inside of the air pressure chamber 38. Several connecting grooves 43 that communicate with the connecting groove 39 are opened on the magnetic strip 42. Several springs 44 are fixedly installed between the magnetic strip 41 and the magnetic strip 42.

[0047] After the sealing ring 5 forms a seal, the sulfur hexafluoride gas inside the cabinet 1 will also enter the sealing ring 5, creating a positive pressure inside the sealing ring 5. Under the action of the repulsive force between the magnetic strip 1 41 and the magnetic strip 2 42 and the elastic force of the spring 44, the sealing ring 5 is tightly fitted to the cabinet 1 and the door 2, thereby improving the sealing effect.

[0048] In operation, a gas supply mechanism and a gas replenishment mechanism, consisting of a gas tank, several support sleeves, a gas supply pipe, a pressure gauge, and a solenoid valve, are installed. Both mechanisms are filled with sulfur hexafluoride (SF6) gas. After the high and low voltage switchgear is closed, the gas supply mechanism is opened to fill the switchgear with SF6 gas, creating a slightly positive pressure inside. This positive pressure improves the sealing effect, preventing the intrusion of external humid air, dust, and corrosive gases. The SF6 gas also enhances insulation strength, preventing discharge and flashover faults, and provides arc extinguishing functionality. Furthermore, an air supply cavity, through-holes, a circulating fan, and an airflow circulation and cooling mechanism consisting of an L-shaped exhaust bend, vertical air guide pipe one, vertical air guide pipe two, several serpentine flat pipes, an L-shaped intake bend, and several heat pipes are incorporated. This system enables the internal circulation of sulfur hexafluoride (SF6) gas within the high and low voltage switchgear. During this internal circulation, heat exchange occurs with the external air, thus dissipating the SF6 gas. The dissipated SF6 gas provides continuous airflow cooling within the high and low voltage switchgear, ensuring its normal operation and extending its service life. The system utilizes heat pipes, serpentine flat tubes, and three cooling fans to improve heat dissipation efficiency. The inclusion of an isolation cavity, insulation filler, and insulation filler provides insulation, preventing damage to the internal electronic equipment in extremely cold weather. Finally, the system incorporates a pressure chamber, connecting grooves, magnetic strips, and springs to enhance the tightness of the seals between the sealing ring and the cabinet and door, thereby improving the sealing performance of the cabinet and door connections.

Claims

1. A high-low voltage cabinet of an insulating gas sealed cabin for high altitude, comprising a cabinet body (1), characterized in that: The front of the cabinet body (1) is provided with a door body (2), the inside of the cabinet body (1) is provided with an electrical equipment (3), the bottom end of one side of the inside of the cabinet body (1) is fixedly provided with a controller (4), the side of the front of the cabinet body (1) is fixedly provided with a sealing ring (5), one side of the outside of the cabinet body (1) is fixedly provided with an air flow circulation heat dissipation mechanism (6), a gas supplement mechanism (7) and a gas supply mechanism (8), the inside of the gas supplement mechanism (7) and the gas supply mechanism (8) is filled with sulfur hexafluoride gas, the bottom end of the inside of the cabinet body (1) is provided with a gas supply inner cavity (9) and a plurality of through holes (10) in communication with the air flow circulation heat dissipation mechanism (6), the through holes (10) are in communication with the gas supply inner cavity (9), the inside of the through holes (10) is fixedly provided with a circulating fan (11), after the door body (2) and the cabinet body (1) are closed, the gas supply mechanism (8) realizes the charging of sulfur hexafluoride gas into the inside of the cabinet body (1), so that a micro-positive pressure state is formed in the inside of the cabinet body (1), the micro-positive pressure state can improve the sealing effect, and external humid air, dust and corrosive gas are prevented from invading; The air flow circulation heat dissipation mechanism (6) is composed of an L-shaped exhaust elbow (12), a vertical air guide pipe one (13), a vertical air guide pipe two (14), a plurality of serpentine flat pipes (15), an L-shaped air inlet elbow (16) and a plurality of heat dissipation heat pipes (17), the L-shaped exhaust elbow (12) penetrates and is connected to the top end of one side of the cabinet body (1), the vertical air guide pipe one (13) is fixedly connected to the bottom end of the L-shaped exhaust elbow (12), the serpentine flat pipes (15) are fixedly connected to the bottom end of the vertical air guide pipe one (13), the vertical air guide pipe two (14) is fixedly connected to the bottom end of the serpentine flat pipes (15), the L-shaped air inlet elbow (16) penetrates and is connected to the bottom end of one side of the cabinet body (1) close to the L-shaped exhaust elbow (12) and is fixedly connected with the vertical air guide pipe two (14), the other end of the L-shaped air inlet elbow (16) is in communication with the gas supply inner cavity (9), the heat dissipation heat pipes (17) penetrate and are connected to one side of the vertical air guide pipe one (13) and extend to the outside of the vertical air guide pipe one (13), a plurality of serpentine flat pipes (15) can improve the contact area with external air, thereby improving the heat dissipation effect, the heat dissipation heat pipes (17) realize self-heat dissipation, so that the temperature of the sulfur hexafluoride gas is reduced, the sulfur hexafluoride gas forms an internal circulation flow in the inside of the cabinet body (1), the L-shaped exhaust elbow (12), the vertical air guide pipe one (13), the vertical air guide pipe two (14), the plurality of serpentine flat pipes (15) and the L-shaped air inlet elbow (16), in the internal circulation process, heat exchange with external air is realized through the serpentine flat pipes (15) and the plurality of heat dissipation heat pipes (17), thereby realizing heat dissipation of the sulfur hexafluoride gas, the sulfur hexafluoride gas after heat dissipation realizes continuous air flow heat dissipation in the inside of the cabinet body (1), and normal operation of the high-low voltage cabinet is ensured; The bottom end of the heat dissipation heat pipe (17) extends to the inside of the vertical air guide pipe one (13) and the cabinet body (1), a plurality of heat dissipation fins (27) are fixedly arranged at the top end of the side of the heat dissipation heat pipe (17), a guide fan (28) is fixedly arranged at the top end of the inside of the vertical air guide pipe one (13).

2. The high-low voltage cabinet of the sealed cabin of the insulating gas for high altitude according to claim 1, characterized in that: The temperature sensor (18) and the air pressure sensor (19) are fixedly arranged at the top of one side of the inside of the cabinet body (1), and the air pressure sensor (2) and the pressure relief valve (21) are fixedly arranged at the top of the side of the cabinet body (1) close to the air flow circulation heat dissipation mechanism (6).

3. The high-low voltage cabinet of the sealed cabin of the insulating gas for high altitude according to claim 1, characterized in that: The air supply mechanism (7) and the air supply mechanism (8) are both composed of the air tank (22), the supporting sleeve (23), the air supply pipe (24), the pressure gauge (25) and the electromagnetic valve (26), the air tank (22) is fixedly connected to one side of the cabinet body (1) through the supporting sleeve (23), the air supply pipe (24) is fixedly connected to the bottom of the air tank (22) and is in communication with the inside of the cabinet body (1), the pressure gauge (25) is connected to the side of the air tank (22), and the electromagnetic valve (26) is connected to the air supply pipe (24).

4. The high-low voltage cabinet of the sealed cabin of the insulating gas for high altitude according to claim 1, characterized in that: A plurality of heat dissipation fans (29) matched with the heat dissipation heat pipes (17) are fixedly arranged at the top of one side of the vertical air guide pipe (13), a plurality of heat dissipation fans (30) matched with the serpentine flat pipes (15) are fixedly arranged at the bottom of one side of the vertical air guide pipe (14), and a plurality of heat dissipation fans (31) are fixedly arranged at the middle position of one side of the serpentine flat pipes (15).

5. The high-low voltage cabinet of the sealed cabin of the insulating gas for high altitude according to claim 1, characterized in that: The cabinet body (1) is fixedly provided with the extension plate (32) at the top of the side close to the air flow circulation heat dissipation mechanism (6), and the bottom of the extension plate (32) is fixedly provided with the air-permeable mesh cover (33) connected with the cabinet body (1).

6. The high-low voltage cabinet of the sealed cabin of the insulating gas for high altitude according to claim 1, characterized in that: The cabinet body (1) is provided with the isolation inner cavity (34), and the inside of the isolation inner cavity (34) is filled with the heat insulation filler (35).

7. The high-low voltage cabinet of the sealed cabin of the insulating gas for high altitude according to claim 1, characterized in that: The inside of the door body (2) is provided with the isolation inner cavity (36), and the inside of the isolation inner cavity (36) is filled with the heat insulation filler (37).

8. The high-low voltage cabinet of the sealed cabin of the insulating gas for high altitude according to claim 1, characterized in that: The inside of the sealing ring (5) is provided with the air pressure chamber (38), the side of the air pressure chamber (38) close to the cabinet body (1) is provided with the communication groove (39), the communication groove (39) is in communication with the inside of the cabinet body (1), and the side of the inside of the cabinet body (1) is provided with a plurality of communication grooves (40) in communication with the communication groove (39).

9. The high-low voltage cabinet for the high-altitude sealed cabin of the insulating gas according to claim 8, characterized in that: One side of the inside of the air pressure chamber (38) is fixedly provided with the magnetic strip (41), the other side of the inside of the air pressure chamber (38) is fixedly provided with the magnetic strip (42), a plurality of communication grooves (43) in communication with the communication groove (39) are formed in the magnetic strip (42), and a plurality of springs (44) are fixedly arranged between the magnetic strip (41) and the magnetic strip (42).

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