Environment-friendly all-insulated switchgear

Abstract

The invention relates to an environment-friendly all-insulation switch device in the technical field of high-voltage switch box insulation, which comprises a high-voltage switch box, a mounting cover is fixedly connected to the inner side wall of the high-voltage switch box, an air inlet pipe and an exhaust pipe are fixedly connected to the interior of the mounting cover, and a cylinder is fixedly connected to the upper end of the mounting cover; under the action of gas thrust, the fan plate blows air to the electrical element in the high-voltage switch box, so that the flowing speed of air on the surface of the electrical element can be increased, the cooling speed of the electrical element is increased, the damage degree of heat to the electrical element is reduced, and when PMVE gas is replaced, the PMVE gas is purified for the first time by using the activated carbon cylinder, and the service life of the PMVE gas is prolonged. When the concentration of the PMVE gas is detected to be qualified, the gas is directly discharged, and when the concentration of the PMVE gas is detected to be unqualified, the PMVE gas is subjected to heating high-temperature treatment by utilizing an electric heating box to be decomposed into carbon dioxide and water, so that the PMVE gas is purified again, and the PMVE gas is not easy to react with substances in the air to be harmful to the environment.

Description

Technical Field

[0001] The invention relates to an environmentally friendly fully insulated switchgear, and in particular to an environmentally friendly fully insulated switchgear used in the field of high-voltage switch box insulation. Background Art

[0002] PMVE is a fluorinated vinyl ether compound with characteristics such as chemical stability, low environmental hazards and physical properties. The main functions of PMVE gas are: environmentally friendly insulating gas (replacing traditional SF6, used in 145kV and above high-voltage circuit breakers and gas-insulated switchgear, solving the insulation and arc extinguishing problems of high-voltage equipment under high environmental protection requirements, and achieving the goal of zero greenhouse gas emissions) and application in special chemical fields (synthesis of new and highly efficient pesticides with low toxicity and environmental friendliness, participating in the production of fluorinated surfactants and perfluoroether oils, used in electronic chemicals and precision industrial fields).

[0003] The high-voltage switch box contains multiple electrical components, and its internal components will generate arcs. The arc has the following hazards: high-temperature melting, explosion shock wave, damage to people's skin and eyes, and damage to people's respiratory system. Therefore, when in use, people will seal the electrical components that generate arcs in a mechanism filled with PMVE gas to solve the insulation and arc extinguishing problems of high-voltage equipment under high environmental protection requirements. However, when replacing the PMVE gas in the equipment, most existing technologies directly discharge the used PMVE gas into the air. When its concentration is high, when it is released into air containing particulate matter, it may be adsorbed on the surface of the particles, increasing the possibility of pollutants penetrating deep into the human body. If it coexists with nitrogen oxides or volatile organic compounds, it may generate ozone through photochemical reactions, exacerbating regional photochemical smog pollution. Summary of the Invention

[0004] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that when replacing the PMVE gas in the equipment, most of the prior art directly discharges the used PMVE gas into the air.

[0005] In order to solve the above problems, the present invention provides an environmentally friendly fully insulated switchgear, including a high-voltage switch box, a mounting cover fixedly connected to the inner wall of the high-voltage switch box, an air intake pipe and an exhaust pipe fixedly connected inside the mounting cover, a cylinder fixedly connected to the upper end of the mounting cover, an exhaust pump fixedly connected inside the cylinder, the exhaust pump and the exhaust pipe fixedly connected, an activated carbon cylinder movably inserted inside the cylinder, a sealing cover fixedly connected to the side of the cylinder away from the exhaust pipe by bolts, an air supply pipe fixedly connected inside the sealing cover, an upper end of the air supply pipe fixedly connected to an air outlet pipe 1, an outer end of the air outlet pipe 1 fixedly connected to a valve, an upper end of the air supply pipe fixedly connected to a controller and a valve, a sensor fixedly connected inside the air supply pipe, an electric heating box movably sleeved on one end of the air supply pipe away from the sealing cover, and a valve fixedly connected to the outer end of the air supply pipe.

[0006] In the above-mentioned environmentally friendly fully insulated switchgear, during the process of injecting PMVE gas into the mounting cover, the rotating plate and the fan plate will rotate under the action of the gas thrust, and then the fan plate will blow air to the electrical components in the high-voltage switch box, thereby increasing the air flow rate on the surface of the electrical components, thereby increasing the cooling rate and reducing the damage to the electrical components caused by heat. When replacing the PMVE gas, it is first purified using an activated carbon cartridge to reduce its concentration. When the concentration test is qualified, the gas is directly discharged. When the concentration test is unqualified, it is heated at high temperature using an electric heating box to decompose it into carbon dioxide and water, thereby purifying the PMVE gas again to prevent it from reacting with substances in the air that are harmful to the environment.

[0007] As a further improvement of the present invention, a rotating rod 1 is inserted into the interior of the mounting cover for rotation, a pair of side ends of the rotating rod 1 are fixedly connected to a rotating rod 2, the outer end of the rotating rod 1 is fixedly connected to four groups of rotating plates, the outer ends of a pair of rotating rods 2 are fixedly connected to four groups of fan plates, and ventilation holes are opened on a pair of side surfaces of the high-voltage switch box.

[0008] As a further improvement of the present invention, one end of the mounting cover away from the rotating plate is an open structure, wherein one rotating plate and the air inlet pipe are located on the same vertical plane.

[0009] As a further improvement of the present invention, the inner wall of the cylinder is coated with a magnetic coating 1, and the outer end of the activated carbon cylinder is coated with a magnetic coating 2 magnetically connected to the magnetic coating 1.

[0010] As another improvement of the present invention, a pair of air outlet pipes 2 are fixedly connected to the side of the electric heating box away from the gas transmission pipe, the upper ends of the air outlet pipes 2 are fixedly connected to the controller and the valve, the end of the air outlet pipe 2 away from the electric heating box is threadedly connected to a threaded ring, the side of the threaded ring is fixedly connected to a docking pipe, the end of the docking pipe away from the threaded ring is fixedly connected to the air inlet box, a water inlet hole is opened on the inner bottom wall of the electric heating box, and a water collecting tank is placed on the lower side of the electric heating box.

[0011] As another improved supplement to the present invention, an inclined plate is fixedly connected to the side of the high-voltage switch box, and the upper side of the inclined plate abuts against the lower side of the water collecting tank.

[0012] As another improved supplement to the present invention, a circular plate is movably inserted inside the electric heating box, a connecting plate is fixedly connected to the outer side of the circular plate, a plurality of springs are fixedly connected to the side of the connecting plate, one end of the spring away from the connecting plate is fixedly connected to the inner wall of the electric heating box, the side end of the circular plate is against the air outlet of the gas pipe, and the outer diameter of the circular plate is larger than the outer diameter of the gas pipe.

[0013] As another improved supplement of the present invention, a pair of reinforcement grooves are opened on the inner wall of the electric heating box, and a pair of sliding blocks slidably connected to the reinforcement grooves are fixedly connected to the outer side of the connecting plate.

[0014] As another improved supplement to the present invention, an air pressure sensor is fixedly connected to the interior of the air intake box, and an alarm and a controller are fixedly connected to the upper side of the air intake box.

[0015] The present invention is divided into the following steps when used:

[0016] 1. In the process of injecting PMVE gas into the installation cover, the gas thrust will cause the rotating plate and the fan plate to rotate, and then the fan plate will blow air to the electrical components in the high-voltage switch box, thereby increasing the air flow rate on the surface of the electrical components, thereby increasing the cooling rate and reducing the damage to the electrical components caused by heat. When replacing the PMVE gas, it is first purified using an activated carbon cartridge to reduce its concentration. When the concentration test is qualified, the gas is directly discharged. When the concentration test is unqualified, it is heated at high temperature using an electric heating box to decompose carbon dioxide and water, thereby purifying the PMVE gas again to prevent it from reacting with substances in the air that are harmful to the environment.

[0017] 2. When the present invention is in use, the air inlet box is used to collect the carbon dioxide gas generated by decomposition, the water collecting box is used to collect the water generated by decomposition, and the water droplets attached to the inner wall of the electric heating box are scraped off by the movable connecting plate to increase the speed of water droplets entering the water collecting box. The collected carbon dioxide gas can be used for green power generation, chemical raw material conversion, bioresource application and geological resource development, etc. The collected water can be used for industrial recycling and ecological replenishment, etc., thereby saving resources and being more environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall schematic diagram of the present invention;

[0019] Figure 2 is a cross-sectional schematic diagram of the mounting cover of the present invention;

[0020] Figure 3 It is a schematic diagram of the fan plate of the present invention;

[0021] Figure 4 It is a schematic diagram of a cylinder of the present invention;

[0022] Figure 5 For the present invention Figure 4 A partial enlarged schematic diagram in the middle;

[0023] Figure 6 Schematic diagram of the activated carbon cartridge of the present invention;

[0024] Figure 7 It is a schematic diagram of the electric heating box of the present invention;

[0025] Figure 8 Schematic diagram of the connecting plate of the present invention.

[0026] Description of the numbers in the figure:

[0027] 1. High-voltage switch box; 2. Mounting cover; 3. Air inlet pipe; 4. Exhaust pipe; 5. Cylinder; 6. Activated carbon cartridge; 7. Sealing cover; 8. Air supply pipe; 9. Air outlet pipe 1; 10. Threaded ring; 11. Electric heating box; 12. Rotating rod 1; 13. Rotating rod 2; 14. Rotating plate; 15. Fan plate; 16. Vent; 17. Magnetic coating 1; 18. Magnetic coating 2; 19. Air outlet pipe 2; 20. Butt joint; 21. Air inlet box; 22. Water inlet hole; 23. Water collecting box; 24. Inclined plate; 25. Round plate; 26. Connecting plate; 27. Spring; 28. Reinforcement groove; 29. Sliding block; 30. Alarm. DETAILED DESCRIPTION

[0028] Two embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] The first implementation method:

[0030] Figure 1-4 and Figure 6-7 The invention shows an environmentally friendly fully insulated switchgear, comprising a high-voltage switch box 1, a mounting cover 2 being fixedly connected to the inner wall of the high-voltage switch box 1, an air inlet pipe 3 and an air extraction pipe 4 being fixedly connected to the interior of the mounting cover 2, a cylinder 5 being fixedly connected to the upper end of the mounting cover 2, an air extraction pump being fixedly connected to the interior of the cylinder 5, an activated carbon cylinder 6 being movably inserted into the interior of the cylinder 5, a sealing cover 7 being fixedly connected to the side of the cylinder 5 away from the air extraction pipe 4 by bolts, an air supply pipe 8 being fixedly connected to the interior of the sealing cover 7, and the upper end of the air supply pipe 8 being fixedly connected to the upper end of the air supply pipe 8. There is an air outlet pipe 9, the outer end of which is fixedly connected to a valve, the upper end of the air supply pipe 8 is fixedly connected to a controller and a valve, the inside of the air supply pipe 8 is fixedly connected to a sensor, and the valve and the sensor are electrically connected to the controller through a wire. An electric heating box 11 is movably sleeved on one end of the air supply pipe 8 away from the sealing cover 7, and a pair of mounting blocks are fixedly connected to the side of the electric heating box 11. The mounting blocks are mounted on the high-voltage switch box 1 by bolts, thereby improving the stability of the electric heating box 11 on the high-voltage switch box 1, and the outer end of the air inlet pipe 3 is fixedly connected to a valve;

[0031] A rotating rod 12 is rotatably inserted into the interior of the mounting cover 2. A pair of side ends of the rotating rod 12 are fixedly connected to a rotating rod 2 13. The outer end of the rotating rod 12 is fixedly connected to four sets of rotating plates 14. The outer ends of the pair of rotating rods 2 13 are fixedly connected to four sets of fan plates 15. Ventilation holes 16 are opened on a pair of side surfaces of the high-voltage switch box 1.

[0032] The end of the mounting cover 2 away from the rotating plate 14 is an open structure, wherein one rotating plate 14 and the air inlet pipe 3 are located on the same vertical plane so that the gas blows downward to rotate the rotating plate 14;

[0033] The inner wall of the cylinder 5 is coated with a magnetic coating 17, and the outer end of the activated carbon cartridge 6 is coated with a magnetic coating 18 that is magnetically connected to the magnetic coating 17. The stability of the activated carbon cartridge 6 in the cylinder 5 is improved by adsorbing the magnetic coating 17 and the magnetic coating 18 together. The activated carbon cartridge 6 is designed to be detachable, which facilitates the replacement and maintenance of the activated carbon cartridge 6 by personnel.

[0034] The present invention is divided into the following steps when used:

[0035] Step 1: Fix the mounting cover 2 on the electrical component generating the arc in the high-voltage switch box 1, and then inject PMVE gas into the air inlet pipe 3. The gas then passes through the air inlet pipe 3 and enters the mounting cover 2.

[0036] After the gas moves out of the outlet end of the air inlet pipe 3, the thrust of the gas causes the rotating plate 14 to drive the rotating rod 12 to rotate, and then the rotating rod 2 13 drives the fan plate 15 to rotate. When the fan plate 15 rotates, it will generate wind force to blow air to the internal components of the high-voltage switch box 1, and cooperate with the vent hole 16 to make the gas quickly enter and exit the high-voltage switch box 1, thereby accelerating the speed of air flow on the surface of the electrical components and improving their cooling rate;

[0037] Step 2: Inject PMVE gas into the mounting cover 2. After a certain period of use, when replacing the PMVE gas, start the air pump in the cylinder 5 to pump the gas upward, so that the gas passes through the air extraction pipe 4 and enters the cylinder 5. After the gas enters the cylinder 5, it is adsorbed and purified by the activated carbon cartridge 6 to reduce its concentration.

[0038] The gas treated by the activated carbon cartridge 6 will enter the gas pipe 8, and then the gas concentration will be detected by the sensor in the gas pipe 8. When the concentration meets the standard for direct discharge, the controller will activate the valve on the gas outlet pipe 9 to allow the gas to be discharged from the gas outlet pipe 9.

[0039] Step 3: When the sensor detects that the gas concentration is unqualified, the controller starts the valve on the gas pipe 8. At this time, the valve on the outlet pipe 9 remains closed, and then the gas in the activated carbon cartridge 6 will pass through the gas pipe 8 into the electric heating box 11;

[0040] After the gas has completely entered the electric heating box 11, the valve on the gas pipe 8 is closed to prevent the gas from flowing back from the electric heating box 11 into the gas pipe 8. Then the electric heating box 11 is started to increase the internal temperature to heat the PMVE gas at high temperature to decompose carbon dioxide and water, thereby further purifying the PMVE gas and preventing it from reacting with substances in the air that are harmful to the air.

[0041] Step 4: After taking the PMVE gas out of the installation cover 2, repeat the operation in step 1 to inject new PMVE gas into the installation cover 2.

[0042] To sum up, when the present invention is in use, during the process of injecting PMVE gas into the mounting cover 2, under the action of gas thrust, the rotating plate 14 and the fan plate 15 will rotate, and then the fan plate 15 will blow air to the electrical components in the high-voltage switch box 1, thereby increasing the speed of air flow on the surface of the electrical components, thereby increasing the cooling rate and reducing the damage to the electrical components caused by heat. When replacing the PMVE gas, the activated carbon cartridge 6 is used to purify it for the first time to reduce its concentration. When the concentration test is qualified, the gas is directly discharged. When the concentration test is unqualified, the electric heating box 11 is used to heat it at high temperature to decompose carbon dioxide and water, thereby purifying the PMVE gas again to make it less likely to react with substances in the air that are harmful to the environment.

[0043] The second implementation method:

[0044] This embodiment adds the following structure based on the first embodiment, and the rest of the structure remains the same as the first embodiment, as follows:

[0045] Figure 4-5 and Figure 7-8 It is shown that a pair of air outlet pipes 19 are fixedly connected to the side of the electric heating box 11 away from the gas pipe 8, and the upper end of the air outlet pipe 19 is fixedly connected to a controller and a valve. The end of the air outlet pipe 19 away from the electric heating box 11 is threadedly connected to a threaded ring 10, and the side of the threaded ring 10 is fixedly connected to a docking pipe 20. The end of the docking pipe 20 away from the threaded ring 10 is fixedly connected to an air inlet box 21. A water inlet hole 22 is opened on the inner bottom wall of the electric heating box 11, and a water collecting box 23 is placed on the lower side of the electric heating box 11. The water collecting box 23 is made of transparent material.

[0046] A sloping plate 24 is fixedly connected to the side of the high-voltage switch box 1. The upper side of the sloping plate 24 abuts against the lower side of the water collecting box 23. The sloping plate 24 is used to support the water collecting box 23 to improve its stability. A pair of mounting blocks are fixedly connected to the side of the water collecting box 23. The mounting blocks are mounted on the sloping plate 24 by bolts, thereby improving the stability of the water collecting box 23 on the sloping plate 24.

[0047] A circular plate 25 is movably inserted into the interior of the electric heating box 11. A connecting plate 26 is fixedly connected to the outer side of the circular plate 25. A plurality of springs 27 are fixedly connected to the side of the connecting plate 26. One end of the spring 27 away from the connecting plate 26 is fixedly connected to the inner side wall of the electric heating box 11. The side end of the circular plate 25 abuts against the gas outlet of the gas pipe 8, and the outer diameter of the circular plate 25 is larger than the outer diameter of the gas pipe 8.

[0048] A pair of reinforcement grooves 28 are provided on the inner wall of the electric heating box 11. A pair of sliding blocks 29 slidably connected to the reinforcement grooves 28 are fixedly connected to the outer side of the connecting plate 26. The side of the sliding block 29 away from the connecting plate 26 is fixedly connected to the electric roller.

[0049] An air pressure sensor is fixedly connected to the interior of the air intake box 21 , and an alarm 30 and a controller are fixedly connected to the upper side of the air intake box 21 . Both the air pressure sensor and the alarm 30 are electrically connected to the controller via wires.

[0050] The present invention is divided into the following steps when used:

[0051] Step 1: After the PMVE gas is decomposed into carbon dioxide and water in the electric heating box 11, the valve on the second outlet pipe 19 is opened to allow the carbon dioxide gas to pass through the second outlet pipe 19, the threaded ring 10, and the docking pipe 20 in sequence into the air inlet box 21. The carbon dioxide gas is collected by the air inlet box 21, and the air pressure in the air inlet box 21 is detected by the air pressure sensor;

[0052] When the air pressure in the air inlet box 21 reaches the set value, the valves on the butt-joint pipe 20 and the second air outlet pipe 19 are closed to prevent the gas from moving out of the electric heating box 11 and the air inlet box 21. At the same time, the alarm 30 will emit an audible and visual signal to remind the personnel that the air inlet box 21 is full of gas. After that, the air inlet box 21 full of gas is removed from the second air outlet pipe 19, and another air inlet box 21 is used to continue collecting gas.

[0053] Step 2: The water generated in the electric heating box 11 will pass through the water inlet hole 22 and fall into the water collecting box 23, and the water collecting box 23 will collect the water;

[0054] During the water collection process, the electric roller can be started to drive the sliding block 29 to move in the reinforcement groove 28. When the sliding block 29 moves, it will drive the connecting plate 26 to move in the electric heating box 11, scraping off the water droplets on the inner wall of the electric heating box 11, thereby increasing the speed of separation of the water droplets from the inner wall of the electric heating box 11;

[0055] When the connecting plate 26 moves, it will pull the spring 27 to stretch it. When the connecting plate 26 moves to a certain position, the electric roller is turned off. Under the action of the tension of the spring 27, the connecting plate 26 will move in the reset direction, thereby saving electricity and facilitating the reset of the connecting plate 26.

[0056] To sum up, when the present invention is in use, the air intake box 21 is used to collect the carbon dioxide gas generated by decomposition, the water collecting box 23 is used to collect the water generated by decomposition, and the water droplets attached to the inner wall of the electric heating box 11 are scraped off by the movable connecting plate 26, thereby increasing the speed at which the water droplets enter the water collecting box 23. The collected carbon dioxide gas can be used for green power generation, chemical raw material conversion, bioresource application, and geological resource development, etc. The collected water can be used for industrial recycling and ecological replenishment, etc., thereby saving resources and being more environmentally friendly.

[0057] The above-mentioned front, back, left, right, up and down are all based on the Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0058] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0059] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An environmentally friendly fully insulated switchgear, comprising a high-voltage switch box (1), characterized in that: A mounting cover (2) is fixedly connected to the inner side wall of the high-voltage switch box (1); The interior of the mounting cover (2) is fixedly connected to an air inlet pipe (3) and an air extraction pipe (4); the upper end of the mounting cover (2) is fixedly connected to a cylinder (5); the interior of the cylinder (5) is fixedly connected to an air extraction pump; and the air extraction pump is fixedly connected to the air extraction pipe (4); An activated carbon cartridge (6) is movably inserted into the interior of the cylinder (5), and a sealing cover (7) is fixedly connected to the side of the cylinder (5) away from the air extraction pipe (4) by means of bolts. An air supply pipe (8) is fixedly connected to the interior of the sealing cover (7), and an air supply pipe (9) is fixedly connected to the upper end of the air supply pipe (8), and an air outlet pipe (9) is fixedly connected to the outer end of the air outlet pipe (9). The upper end of the gas delivery pipe (8) is fixedly connected to a controller and a valve, and the interior of the gas delivery pipe (8) is fixedly connected to a sensor; An electric heating box (11) is movably sleeved on one end of the air delivery pipe (8) away from the sealing cover (7), and a valve is fixedly connected to the outer end of the air inlet pipe (3).

2. The environmentally friendly fully insulated switchgear according to claim 1, characterized in that: A rotating rod (12) is rotatably inserted inside the mounting cover (2), a pair of side ends of the rotating rod (12) are fixedly connected to a rotating rod (13), an outer end of the rotating rod (12) is fixedly connected to four groups of rotating plates (14), a pair of outer ends of the rotating rod (13) are fixedly connected to four groups of fan plates (15), and a pair of side surfaces of the high-voltage switch box (1) are provided with ventilation holes (16).

3. The environmentally friendly fully insulated switchgear according to claim 2, characterized in that: One end of the mounting cover (2) away from the rotating plate (14) is an open structure, wherein one of the rotating plates (14) and the air inlet pipe (3) are located on the same vertical plane.

4. The environmentally friendly fully insulated switchgear according to claim 3, characterized in that: The inner wall of the cylinder (5) is coated with a magnetic coating (17), and the outer end of the activated carbon cylinder (6) is coated with a magnetic coating (18) that is magnetically connected to the magnetic coating (17).

5. The environmentally friendly fully insulated switchgear according to claim 4, characterized in that: The electric heating box (11) is fixedly connected to a pair of air outlet pipes (19) on one side away from the gas supply pipe (8), and the upper end of the air outlet pipe (19) is fixedly connected to a controller and a valve. The end of the air outlet pipe (19) away from the electric heating box (11) is threadedly connected to a threaded ring (10), and the side of the threaded ring (10) is fixedly connected to a docking pipe (20). The end of the docking pipe (20) away from the threaded ring (10) is fixedly connected to an air inlet box (21). A water inlet hole (22) is provided on the inner bottom wall of the electric heating box (11), and a water collecting box (23) is placed on the lower side of the electric heating box (11).

6. The environmentally friendly fully insulated switchgear according to claim 5, characterized in that: A slanted plate (24) is fixedly connected to the side of the high-voltage switch box (1), and the upper side of the slanted plate (24) abuts against the lower side of the water collecting box (23).

7. The environmentally friendly fully insulated switchgear according to claim 6, characterized in that: A circular plate (25) is movably inserted inside the electric heating box (11), and a connecting plate (26) is fixedly connected to the outer side of the circular plate (25). A plurality of springs (27) are fixedly connected to the side of the connecting plate (26), and one end of the spring (27) away from the connecting plate (26) is fixedly connected to the inner wall of the electric heating box (11). The side end of the circular plate (25) is against the air outlet of the gas pipe (8), and the outer diameter of the circular plate (25) is larger than the outer diameter of the gas pipe (8).

8. The environmentally friendly fully insulated switchgear according to claim 7, characterized in that: A pair of reinforcement grooves (28) are provided on the inner wall of the electric heating box (11), and a pair of sliding blocks (29) slidably connected to the reinforcement grooves (28) are fixedly connected to the outer side of the connecting plate (26).

9. The environmentally friendly fully insulated switchgear according to claim 8, characterized in that: An air pressure sensor is fixedly connected to the interior of the air intake box (21), and an alarm (30) and a controller are fixedly connected to the upper side of the air intake box (21).

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