Heat dissipation protection shell for transformer

Abstract

The invention relates to the technical field of transformer protection, and particularly discloses a heat dissipation protection shell for a transformer, the heat dissipation protection shell comprises a flowing structure, a transformer main body is mounted in the flowing structure, a first heat dissipation structure detachably penetrates through the flowing structure, and a second heat dissipation structure is arranged on the flowing structure; the cooling device has the design of natural flowing circulation, power-assisted driving circulation, dual cooling, operation cost reduction, simple structure, convenient maintenance and air pressure difference pumping force, automatic oil pumping is achieved through the air pressure difference in the backflow cylinder, innovativeness is high, the first heat dissipation structure and the second heat dissipation structure are combined, efficient cooling is achieved, the overall heat dissipation performance is improved, and the service life of the cooling device is prolonged. The equipment can adjust the operation mode and the installation number of the first heat dissipation structures according to actual requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of transformer protection, and particularly to a heat dissipation protection housing for a transformer. Background Art

[0002] The heat dissipation of a transformer is one of the key factors to ensure its normal operation and extend its service life; during the operation of the transformer, heat is generated. If the heat cannot be effectively dissipated, it will cause the temperature of the transformer to rise, which will in turn affect its performance and life, and may even lead to failures; currently, most of the heat dissipation of transformers is achieved by immersing the transformer in insulating oil through the outer shell. This design is an important part of the heat dissipation and insulation of transformers and is widely used in the power system; however, due to the single natural heat dissipation efficiency of the oil in the outer shell, if a pump is set up to promote circulation, the energy consumption is large, and regular maintenance is required, and the overhaul is inconvenient. Summary of the Invention

[0003] The purpose of the present invention is to provide a heat dissipation protection housing for a transformer to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A heat dissipation protection housing for a transformer, including a flow structure, a transformer main body is installed in the flow structure, a first heat dissipation structure is detachably penetrated in the flow structure, and a second heat dissipation structure is arranged on the flow structure; the flow structure is used to carry the heat dissipation liquid and promote the liquid flow and carry the transformer main body, the first heat dissipation structure is used to dissipate heat from the liquid or the reflux liquid in the flow structure, and the second heat dissipation structure is used to extract heat during the liquid flow.

[0005] Preferably, the flow structure includes a main body box, a box cover, a first liquid extraction pipe and a flow unit; the main body box is a rectangular box without an upper wall, and installation openings are symmetrically opened on the left and right side walls of the main body box. The box cover is detachably buckled on the main body box, and a reflux port is opened in the middle of the rear end of the box cover. The reflux port corresponds to the installation opening. One end of the first liquid extraction pipe is fixedly penetrated through the box cover and is located in the middle of the left side of the box cover, and the flow unit is detachably arranged on the rear end of the box cover.

[0006] Preferably, the flow unit includes a reflux cylinder, a cylinder cover, a first solenoid valve, a second solenoid valve, a second liquid suction pipe, an air extraction pump, and a third solenoid valve; the reflux cylinder is detachably arranged on the upper wall of the rear end of the box cover and is located at the reflux port, the cylinder cover is detachably buckled on the reflux cylinder, one end of the first solenoid valve is fixedly connected to the lower wall of the reflux cylinder, and one end of the first solenoid valve communicates with the reflux cylinder, the first solenoid valve penetrates through the reflux port and is located inside the main box, one end of the second solenoid valve is fixedly arranged at a position near the top of the left side wall of the reflux cylinder, and one end of the second solenoid valve communicates with the reflux cylinder, the second solenoid valve is a three-way solenoid valve, one end of the second liquid suction pipe is connected to one end of the first liquid suction pipe, and the other end of the second liquid suction pipe is connected to one of the ends of the second solenoid valve, the air extraction pump is fixedly arranged in the middle of the lower wall of the cylinder cover, and one end of the third solenoid valve fixedly penetrates through the cylinder cover and is connected to the exhaust end of the air extraction pump.

[0007] Preferably, the first heat dissipation structure includes a first heat dissipation box, a plurality of first heat conducting plates, a plurality of second heat conducting plates, a first fan, and a sleeve; the first heat dissipation box is a rectangular tube structure, the left end of the first heat dissipation box movably penetrates through the installation port on the left side wall of the main box, and the right end of the first heat dissipation box penetrates through the installation port on the right side wall of the main box, the first heat dissipation box is hermetically fitted with the main box, the upper wall of the first heat dissipation box is an inclined surface to the right, and a plurality of slots are equidistantly arranged on the upper wall, the front and rear side walls inside the first heat dissipation box, one end of the first heat dissipation box is fixed to the main box by bolts, a plurality of the first heat conducting plates are respectively movably inserted into the slots on the upper wall inside the first heat dissipation box, and the first heat conducting plates are fitted with the upper wall of the first heat dissipation box, one end of each of the plurality of second heat conducting plates is respectively detachably inserted into the slots on the front and rear side walls inside the first heat dissipation box, the first fan is fixedly arranged on the left end of the first heat dissipation box, and the sleeve is detachably arranged on the right side wall of the first heat dissipation box and buckled on the right end of the first heat dissipation box.

[0008] Preferably, the second heat dissipation structure includes a second heat dissipation box, a box cover, a wind guiding plate, a pair of fastening bolts, and a second fan; the second heat dissipation box is detachably arranged on the upper wall of the box cover, the rear side wall inside the second heat dissipation box is symmetrically provided with chutes, the right side of the second heat dissipation box is sleeved on one end of the second liquid suction pipe, and the second liquid suction pipe penetrates through the left side wall of the second heat dissipation box, the left and right ends of the lower wall of the box cover are symmetrically provided with legs, the box cover is fixedly arranged on the upper wall of the second heat dissipation box through the legs, and the box cover is located above the second heat dissipation box, the rear end of the wind guiding plate is symmetrically provided with sliders that fit the chutes, the wind guiding plate is movably embedded in the second heat dissipation box, and the sliders are movably inserted into the chutes, the wind guiding plate is inclined forward, and the wind guiding plate is located behind one end of the second liquid suction pipe and below the other end of the second liquid suction pipe, a pair of the fastening bolts are respectively movably screwed into the rear side wall of the second heat dissipation box, and the fastening bolts are screwed into the sliders, the second fan is fixedly embedded in the bottom end of the rear side wall of the second heat dissipation box, and the second heat dissipation box is located below the wind guiding plate.

[0009] Preferably, the transformer body is located on the front side of the first heat dissipation structure and in the middle of the main body box.

[0010] Preferably, multiple groups of the first heat dissipation structures can be arranged on the main body box for heat dissipation of the internal liquid depth.

[0011] Preferably, the middle of the upper wall of the first heat dissipation box faces the other end of the first solenoid valve for reflux contact heat conduction.

[0012] A heat dissipation protection housing for a transformer proposed by the present invention has the beneficial effects that: by setting up a flow unit, it realizes the automatic extraction of the oil liquid in the main body box outside the transformer body to promote the flow. That is, by maintaining a certain air pressure in the reflux cylinder, after the oil liquid inside the reflux cylinder flows out and returns to the outer shell, a suction force is generated in the reflux cylinder to automatically extract the oil liquid in the main body box to form a natural flow cycle; the oil liquid flow cycle can also be assisted and driven by an air pump; and during the oil liquid extraction, the second heat dissipation structure is used to quickly cool the diverted oil liquid by air cooling; at the same time, the returned oil liquid contacts the first heat dissipation structure and conducts heat through flow to achieve secondary cooling and heat dissipation, and the first heat dissipation structure can also cool the oil liquid deep in the main body box, realizing the improvement of the overall cooling and heat dissipation, ensuring the safety and stability of the transformer; in summary, the present invention has the following effects: 1. Through the air pressure difference and suction force in the reflux cylinder, the natural flow cycle of the oil liquid is realized, which can promote the flow of the oil liquid without additional power, improve the heat dissipation efficiency, save energy consumption, and with the assistance of an air pump for driving, further accelerate the oil liquid flow rate, which is especially suitable for high-load or high-temperature environments, ensuring the stability of the internal temperature of the transformer. The oil liquid is cooled twice by the first heat dissipation structure and the second heat dissipation structure, significantly improving the overall heat dissipation effect, reducing the internal temperature of the transformer, and prolonging the service life of the equipment.

[0013] 2. Under normal circumstances, rely on the air pressure difference and the gravity of the oil liquid to achieve natural circulation, reduce the dependence on the air pump, reduce energy consumption, only start the air pump when needed, avoid long-term operation, and further save energy. By optimizing the heat dissipation structure, improve the heat dissipation efficiency and reduce the energy consumption of the cooling system.

[0014] 3. The flow unit, reflux cylinder, first heat dissipation structure and second heat dissipation structure can all be modularly designed, which is convenient for installation, disassembly and maintenance. The oil liquid is automatically extracted through the air pressure difference and suction force, reducing manual intervention and the maintenance difficulty. The first heat dissipation structure can cool the oil liquid deep in the outer shell, and the second heat dissipation structure quickly cools the diverted oil liquid by air cooling. The overall design is reasonable and the maintenance cost is low.

[0015] 4. Whether it is natural circulation or assisted drive, it can be flexibly adjusted according to the load and ambient temperature of the transformer, with strong adaptability. In high-load or high-temperature environments, through the assisted drive of the air extraction pump and double cooling, it ensures the safe and stable operation of the transformer, and can be compatible with the existing transformer cooling system, facilitating transformation and upgrading.

[0016] 5. The second heat dissipation structure quickly air-cools the shunted oil fluid to reduce the oil fluid temperature and the aging rate of the oil fluid. The first heat dissipation structure can cool the oil fluid deep inside the housing to ensure uniform distribution of the oil fluid temperature and avoid local overheating. Through efficient heat dissipation and uniform cooling, it reduces the oxidation and deterioration of the oil fluid, extends the oil fluid replacement cycle, and reduces the operation cost. Brief Description of the Drawings

[0017] Figure 1 is the schematic assembly structure diagram of the present invention; Figure 2 is the schematic exploded structure diagram of the flow structure of the present invention; Figure 3 is the schematic assembled structure diagram of the flow structure of the present invention; Figure 4 is the schematic exploded structure diagram of the first heat dissipation structure of the present invention; Figure 5 is the partially enlarged structure schematic diagram of the first heat dissipation structure of the present invention; Figure 6 is the schematic exploded structure diagram of the second heat dissipation structure; Figure 7 is the schematic assembled structure diagram of the second heat dissipation structure; Figure 8 is Figure 1 the partially enlarged display structure schematic diagram of the assembled parts of multiple first heat dissipation structures in

[0018] In the figure: 1. Flow structure; 11. Main body box; 12. Box cover; 13. First liquid extraction pipe; 14. Flow unit; 141. Return cylinder; 142. Cylinder cover; 143. First solenoid valve; 144. Second solenoid valve; 145. Second liquid extraction pipe; 146. Air extraction pump; 147. Third solenoid valve; 2. First heat dissipation structure; 21. First heat dissipation box; 22. First heat conduction plate; 23. Second heat conduction plate; 24. First fan; 25. Sleeve frame; 3. Second heat dissipation structure; 31. Second heat dissipation box; 32. Box cover; 33. Air guiding plate; 34. Fastening bolt; 35. Second fan; 4. Transformer main body; 5. Slide block; 6. Slide groove; 7. Installation port; 8. Return port; 9. Slot. Detailed Description of the Invention

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1 - 8 , the present invention provides a technical solution: a heat dissipation protection housing for a transformer, including a flow structure 1, a transformer main body 4 is installed in the flow structure 1, a first heat dissipation structure 2 is detachably penetrated in the flow structure 1, and a second heat dissipation structure 3 is arranged on the flow structure 1; the flow structure 1 is used to carry the heat dissipation liquid and promote the liquid flow and carry the transformer main body 4, the first heat dissipation structure 2 is used to dissipate the heat of the liquid or the reflux liquid in the flow structure 1, and the second heat dissipation structure 3 is used to extract the heat during the liquid flow.

[0021] As a preferred solution, further, as Figure 2 and Figure 3 shown, the flow structure 1 includes a main body box 11, a box cover 12, a first liquid extraction pipe 13 and a flow unit 14; the main body box 11 is a rectangular box without an upper wall, and installation openings 7 are symmetrically opened on the left and right side walls of the main body box 11. The box cover 12 is detachably buckled on the main body box 11, and a reflux port 8 is opened in the middle of the rear end of the box cover 12. The reflux port 8 corresponds to the installation opening 7. One end of the first liquid extraction pipe 13 is fixedly penetrated through the box cover 12 and is located in the middle of the left side of the box cover 12. The flow unit 14 is detachably arranged on the rear end of the box cover 12; the box cover 12 and the main body box 11 cooperate to form an outer shell to carry the oil liquid and the transformer main body 4, the oil liquid in the main body box 11 is connected through the first liquid extraction pipe 13 for extraction, and the flow unit 14 is used to provide the power for extraction and reflux.

[0022] As a preferred solution, further, as Figure 2As shown in the figure, the flow unit 14 includes a reflux cylinder 141, a cylinder cover 142, a first solenoid valve 143, a second solenoid valve 144, a second liquid extraction pipe 145, an air extraction pump 146, and a third solenoid valve 147; the reflux cylinder 141 is detachably arranged on the upper wall at the rear end of the box cover 12 and is located at the reflux port 8, the cylinder cover 142 is detachably buckled on the reflux cylinder 141, one end of the first solenoid valve 143 is fixedly connected to the lower wall of the reflux cylinder 141, and one end of the first solenoid valve 143 is communicated with the reflux cylinder 141, the first solenoid valve 143 penetrates through the reflux port 8 and is located in the main body box 11, one end of the second solenoid valve 144 is fixedly arranged at a position near the top of the left side wall of the reflux cylinder 141, and one end of the second solenoid valve 144 is communicated with the reflux cylinder 141, the second solenoid valve 144 is a three-way solenoid valve, one end of the second liquid extraction pipe 145 is connected to one end of the first liquid extraction pipe 13, and the other end of the second liquid extraction pipe 145 is connected to one of the ends of the second solenoid valve 144, the air extraction pump 146 is fixedly arranged in the middle of the lower wall of the cylinder cover 142, one end of the third solenoid valve 147 fixedly penetrates through the cylinder cover 142 and is connected to the exhaust end of the air extraction pump 146; a closed space is formed by the reflux cylinder 141 to maintain a certain internal pressure. When the oil liquid in the reflux cylinder 141 naturally flows back and is discharged into the main body box 11 through the first solenoid valve 143, the liquid level in the reflux cylinder 141 drops to generate internal suction force, and then the oil liquid is extracted through the second liquid extraction pipe 145 and the first liquid extraction pipe 13 to supplement the reflux cylinder 141, so as to maintain a stable flow pressure and liquid level height, forming a continuous flow cycle without the need to provide external force for liquid extraction; the driving of the air extraction pump 146 can also be used to actively provide power for extraction to accelerate the cycle.

[0023] As a preferred solution, furthermore, as Figure 4 and Figure 5As shown in the figure, the first heat dissipation structure 2 includes a first heat dissipation box 21, a plurality of first heat conduction plates 22, a plurality of second heat conduction plates 23, a first fan 24, and a sleeve 25; the first heat dissipation box 21 is a rectangular tube structure, the left end of the first heat dissipation box 21 movably penetrates through the installation opening 7 on the left side wall of the main body box 11, and the right end of the first heat dissipation box 21 penetrates through the installation opening 7 on the right side wall of the main body box 11. The first heat dissipation box 21 is hermetically fitted with the main body box 11. The upper wall of the first heat dissipation box 21 is an inclined surface to the right, and a plurality of slots 9 are equidistantly arranged on the upper inner wall and the front and rear side walls of the first heat dissipation box 21. One end of the first heat dissipation box 21 is fixed to the main body box 11 by bolts. A plurality of first heat conduction plates 22 are respectively movably inserted into the slots 9 on the upper inner wall of the first heat dissipation box 21, and the first heat conduction plates 22 are fitted with the upper wall of the first heat dissipation box 21. One ends of a plurality of second heat conduction plates 23 are respectively detachably inserted into the slots 9 on the front and rear side walls of the first heat dissipation box 21. The first fan 24 is fixedly arranged on the left end of the first heat dissipation box 21. The sleeve 25 is detachably arranged on the right side wall of the first heat dissipation box 21 and buckled on the right end of the first heat dissipation box 21; the first heat dissipation box 21 absorbs heat by contacting the oil fluid and disperses it to a plurality of first heat conduction plates 22 and second heat conduction plates 23, and then the first fan 24 generates wind to pass through the first heat dissipation box 21 for air cooling.

[0024] As a preferred solution, furthermore, as Figure 6 and Figure 7As shown in the figure, the second heat dissipation structure 3 includes a second heat dissipation box 31, a box cover 32, a wind guide plate 33, a pair of fastening bolts 34, and a second fan 35; the second heat dissipation box 31 is detachably arranged on the upper wall of the box cover 12, symmetrically arranged sliding grooves 6 are provided on the rear side wall inside the second heat dissipation box 31, the right side of the second heat dissipation box 31 is sleeved on one end of the second liquid extraction pipe 145, and the second liquid extraction pipe 145 penetrates through the left side wall of the second heat dissipation box 31. Legs are symmetrically arranged at the left and right ends of the lower wall of the box cover 32, the box cover 32 is fixedly arranged on the upper wall of the second heat dissipation box 31 through the legs, and the box cover 32 is located above the second heat dissipation box 31. Sliders 5 that are mutually matched with the sliding grooves 6 are symmetrically arranged at the rear end of the wind guide plate 33, the wind guide plate 33 is movably embedded in the second heat dissipation box 31, and the sliders 5 are movably inserted into the sliding grooves 6. The wind guide plate 33 is inclined forward, and the wind guide plate 33 is located behind one end of the second liquid extraction pipe 145 and below the other end of the second liquid extraction pipe 145. A pair of fastening bolts 34 are respectively movably screwed into the rear side wall of the second heat dissipation box 31, and the fastening bolts 34 are screwed into the sliders 5. The second fan 35 is fixedly embedded in the bottom end of the rear side wall of the second heat dissipation box 31, and the second heat dissipation box 31 is located below the wind guide plate 33; driven by the second fan 35, external wind enters through the top end of the second heat dissipation box 31 to blow the other end of the second liquid extraction pipe 145, and through the inclined setting of the wind guide plate 33, the wind is guided to blow to one end of the second liquid extraction pipe 145, so as to cool the oil liquid flowing and extracted in the second liquid extraction pipe 145, and cooperate with the first heat dissipation structure 2 for secondary cooling. Because the oil liquid in the second liquid extraction pipe 145 is extracted and removed from the main body box 11 for diversion, the liquid volume is reduced, and thus the heat dissipation and cooling speed of the dispersed oil liquid will be increased.

[0025] Furthermore, the transformer body 4 is located in front of the first heat dissipation structure 2, and the transformer body 4 is located in the middle of the main body box 11, which is used to meet the requirements of the designed installation position.

[0026] Furthermore, as Figure 8 shown in the figure, multiple groups of the first heat dissipation structures 2 can be arranged on the main body box 11 for the heat dissipation of the internal liquid depth.

[0027] Furthermore, the middle part of the upper wall of the first heat dissipation box 21 is opposite to the other end of the first solenoid valve 143 for heat conduction in reflux contact.

[0028] The working principle is as follows: S1. First, the transformer body 4 is fixed in the middle of the main body box 11, and then a certain amount of oil liquid (insulating oil) is injected into the main body box 11 for temperature reduction; after the box cover 12 is sealed on the main body box 11, the reflux unit in the flow structure 1 can be driven. S2. That is, the air pump 146 on the driving cylinder cover 142 operates to pump air, the first solenoid valve 143 is closed, the second solenoid valve 144 is opened to communicate with the second liquid suction pipe 145, and the third solenoid valve 147 is opened to discharge the pumped air; the oil in the main body tank 11 flows into the second liquid suction pipe 145 through the first liquid suction pipe 13 and then flows into the reflux cylinder 141; S3. When the liquid level in the reflux cylinder 141 reaches a certain height, the air pump 146 and the third solenoid valve 147 can be closed, and then the first solenoid valve 143 is opened to allow the oil in the reflux cylinder 141 to flow back into the main body tank 11 through the reflux port 8; during the reflux discharge process, the decrease in the liquid level in the reflux cylinder 141 will generate suction, and then the liquid is continuously extracted through the first liquid suction pipe 13 and the second liquid suction pipe 145 for natural flow circulation; S4. When the oil is flowing in the first liquid suction pipe 13 and the second liquid suction pipe 145, the second heat dissipation structure 3 can be driven to cool the oil in the second liquid suction pipe 145; by driving the second fan 35 to generate wind, the external wind enters from the top of the second heat dissipation box 31 and cools the other end of the second liquid suction pipe 145; after the wind enters the second heat dissipation box 31, it is guided by the inclined design of the wind guide plate 33 fixed in the sliding groove 6 by means of the slider 5 and blown towards one end of the second liquid suction pipe 145 for heat dissipation, and the position of the wind guide plate 33 in the second heat dissipation box 31 can be adjusted and fixed by means of the fastening bolt 34; S5. After the oil flows back into the main body tank 11 through the reflux cylinder 141, it will fall on the upper wall of the first heat dissipation box 21 in the first heat dissipation structure 2 and flow along the inclined wall surface to fully contact the first heat dissipation box 21. After the heat is absorbed by the heat dissipation box, it is conducted to the first heat conducting plate 22 and the second heat conducting plate 23 on the slot 9, and then by driving the first fan 24, the wind passes through the first heat dissipation box 21 to blow the first heat conducting plate 22, the second heat conducting plate 23 and the first heat dissipation box 21 for heat dissipation to reduce the oil temperature, so as to realize secondary cooling and heat dissipation during oil extraction and reflux, and ensure the internal temperature; S6. According to the use requirements, multiple groups of the first heat dissipation structure 2 can be arranged to pass through the main body tank 11 to cool the oil in the deep part; and the first fan 24 can be arranged at both ends of the first heat dissipation box 21, that is, the first fan 24 can be arranged on the sleeve frame 25, and the fans at both ends of the first heat dissipation box 21 blow in the same direction to improve the air flow and wind velocity inside the first heat dissipation box 21 and improve the heat dissipation effect.

[0029] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat dissipation and protection housing for a transformer, characterized in that It includes a flow structure (1) in which a transformer body (4) is installed. A first heat dissipation structure (2) is detachably penetrated through the flow structure (1), and a second heat dissipation structure (3) is arranged on the flow structure (1); the flow structure (1) is used to carry a heat dissipation liquid and promote the liquid flow and carry the transformer body (4), the first heat dissipation structure (2) is used to dissipate heat from the liquid or the reflux liquid in the flow structure (1), and the second heat dissipation structure (3) is used to extract heat during the liquid flow.

2. The heat dissipation protection housing for a transformer according to claim 1, characterized in that, The flow structure (1) includes a main body box (11), a box cover (12), a first liquid extraction pipe (13), and a flow unit (14); The main body box (11) is a rectangular box without an upper wall, and mounting openings (7) are symmetrically formed in the left and right side walls of the main body box (11). The box cover (12) is detachably buckled on the main body box (11), and a reflux port (8) is formed in the middle of the rear end of the box cover (12). The reflux port (8) corresponds to the mounting opening (7). One end of the first liquid extraction pipe (13) is fixedly penetrated through the box cover (12) and is located in the middle of the left side of the box cover (12). The flow unit (14) is detachably arranged on the rear end of the box cover (12).

3. The heat dissipation protection housing for a transformer according to claim 2, characterized in that, The flow unit (14) includes a reflux cylinder (141), a cylinder cover (142), a first solenoid valve (143), a second solenoid valve (144), a second liquid extraction pipe (145), an air extraction pump (146), and a third solenoid valve (147); The reflux cylinder (141) is detachably arranged on the upper wall of the rear end of the box cover (12) and is located at the reflux port (8). The cylinder cover (142) is detachably buckled on the reflux cylinder (141). One end of the first solenoid valve (143) is fixedly connected to the lower wall of the reflux cylinder (141), and one end of the first solenoid valve (143) is communicated with the reflux cylinder (141). The first solenoid valve (143) penetrates through the reflux port (8) and is located in the main body box (11). One end of the second solenoid valve (144) is fixedly arranged at a position near the top of the left side wall of the reflux cylinder (141), and one end of the second solenoid valve (144) is communicated with the reflux cylinder (141). The second solenoid valve (144) is a three-way solenoid valve. One end of the second liquid extraction pipe (145) is connected to one end of the first liquid extraction pipe (13), and the other end of the second liquid extraction pipe (145) is connected to one of the ends of the second solenoid valve (144). The air extraction pump (146) is fixedly arranged in the middle of the lower wall of the cylinder cover (142). One end of the third solenoid valve (147) is fixedly penetrated through the cylinder cover (142) and is connected to the exhaust end of the air extraction pump (146).

4. A heat dissipation protection housing for a transformer according to claim 3, characterized in that, The first heat dissipation structure (2) includes a first heat dissipation box (21), a plurality of first heat conducting plates (22), a plurality of second heat conducting plates (23), a first fan (24), and a sleeve frame (25); The first heat dissipation box (21) is of a rectangular tube structure. The left end of the first heat dissipation box (21) movably penetrates through the installation opening (7) on the left side wall of the main body box (11), and the right end of the first heat dissipation box (21) penetrates through the installation opening (7) on the right side wall of the main body box (11). The first heat dissipation box (21) is hermetically fitted with the main body box (11). The upper wall of the first heat dissipation box (21) is an inclined surface to the right. A plurality of slots (9) are equidistantly arranged on the upper inner wall and the front and rear side walls of the first heat dissipation box (21). One end of the first heat dissipation box (21) is fixed to the main body box (11) by bolts. A plurality of the first heat conducting plates (22) are respectively movably inserted into the slots (9) on the upper inner wall of the first heat dissipation box (21), and the first heat conducting plates (22) are fitted with the upper wall of the first heat dissipation box (21). One end of each of a plurality of the second heat conducting plates (23) is detachably inserted into the slots (9) on the front and rear side walls inside the first heat dissipation box (21). The first fan (24) is fixedly arranged on the left end of the first heat dissipation box (21). The sleeve frame (25) is detachably arranged on the right side wall of the first heat dissipation box (21) and buckled on the right end of the first heat dissipation box (21).

5. The heat dissipation protection housing for a transformer according to claim 4, characterized in that, The second heat dissipation structure (3) includes a second heat dissipation box (31), a box cover (32), a wind guiding plate (33), a pair of fastening bolts (34), and a second fan (35). The second heat dissipation box (31) is detachably arranged on the upper wall of the box cover (12). The rear side wall inside the second heat dissipation box (31) is symmetrically provided with chutes (6). The right side of the second heat dissipation box (31) is sleeved on one end of the second liquid extraction pipe (145), and the second liquid extraction pipe (145) penetrates through the left side wall of the second heat dissipation box (31). The left and right ends of the lower wall of the box cover (32) are symmetrically provided with legs. The box cover (32) is fixedly arranged on the upper wall of the second heat dissipation box (31) through the legs, and the box cover (32) is located above the second heat dissipation box (31). The rear end of the wind guiding plate (33) is symmetrically provided with sliders (5) that fit with the chutes (6). The wind guiding plate (33) is movably embedded in the second heat dissipation box (31), and the sliders (5) are movably inserted into the chutes (6). The wind guiding plate (33) is inclined forward, and the wind guiding plate (33) is located behind one end of the second liquid extraction pipe (145) and below the other end of the second liquid extraction pipe (145). A pair of the fastening bolts (34) are respectively movably screwed into the rear side wall inside the second heat dissipation box (31), and the fastening bolts (34) are screwed into the sliders (5). The second fan (35) is fixedly embedded in the bottom end of the rear side wall of the second heat dissipation box (31), and the second heat dissipation box (31) is located below the wind guiding plate (33).

6. The heat dissipation protection housing for a transformer according to claim 5, characterized in that, The transformer body (4) is located in front of the first heat dissipation structure (2), and the transformer body (4) is located in the middle of the main body box (11).

7. The heat dissipation protection housing for a transformer according to claim 6, characterized in that, Multiple groups of the first heat dissipation structures (2) can be arranged on the main body box (11) for dissipating heat of the internal liquid depth.

8. A heat dissipation protection housing for a transformer according to claim 7, characterized in that, The middle of the upper wall of the first heat dissipation box (21) faces the other end of the first solenoid valve (143) for return contact heat conduction.

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