Oil tank of oil-immersed transformer

Abstract

The invention relates to the technical field of transformer oil tanks, and discloses an oil-immersed transformer oil tank which comprises a transformer tank body, wiring control assemblies are arranged at the front end and the rear end of the transformer tank body, and an oil cooling mechanism is arranged on one side of the transformer tank body. The oil cooling mechanism comprises a cooling bin body fixedly connected with one side of the transformer box body, an oil pump is arranged at the top of the cooling bin body, the input end of the oil pump is communicated with the interior of the transformer box body, and the output end of the cooling bin body is communicated with the interior of the transformer box body; according to the oil-immersed transformer oil tank, the internal impeller is driven by kinetic energy of oil flow to rotate, forced airflow is formed to efficiently cool the multi-layer spiral heat dissipation pipe, an additional power device is not needed, energy consumption and operation cost are reduced, efficient combination of cooling oil flowing power and heat dissipation and degassing functions is achieved by converting kinetic energy of cooling oil, and the cooling effect is improved. And the heat dissipation efficiency and the system reliability are obviously improved.

Description

Technical Field

[0001] The present invention relates to the technical field of transformer oil tanks, and more particularly to an oil-immersed transformer oil tank. Background Art

[0002] Oil-immersed transformers are key equipment in power systems, and their heat dissipation performance directly affects their operational stability and lifespan. Traditional oil tank structures typically rely on oil pumps to drive cooling oil circulation and achieve heat exchange through external radiators. However, during actual operation, cooling oil is prone to bubbles, which accumulate on the surface of insulating components and may cause partial discharge or a decrease in dielectric strength, affecting equipment safety. In addition, common air cooling or self-cooling methods often have limited heat dissipation efficiency, making it difficult to achieve sufficient heat dissipation, especially under high temperature or high load conditions, and there is a risk of excessive temperature rise.

[0003] Current oil-immersed transformer cooling systems often rely on independent power sources to drive fans or oil pumps, which not only increases energy consumption but also increases system complexity and the probability of failure. In particular, the precipitation and accumulation of bubbles in the cooling oil flow process has not been effectively addressed. Most designs rely on static settling or external degassing devices, which have limited effectiveness and slow response. Furthermore, heat exchange between the cooling airflow and the oil circuit often relies on natural convection or forced air flow, whose efficiency is significantly constrained by environmental conditions, making stable and efficient thermal management difficult to achieve.

[0004] Therefore, there is an urgent need for an oil-immersed transformer cooling structure that can independently utilize oil flow power to achieve efficient heat dissipation and has an online bubble removal function to improve the overall energy efficiency and reliability of the system and reduce dependence on external energy and auxiliary equipment. Summary of the Invention

[0005] In order to overcome the above technical problems, the present invention proposes an oil-immersed transformer tank.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions: An oil-immersed transformer tank comprises a transformer box body, a wiring control assembly is provided at both the front and rear ends of the transformer box body, and an oil cooling mechanism is provided on one side of the transformer box body; The oil cooling mechanism includes a cooling silo that is fastened to one side of the transformer box, and an oil pump is provided on the top of the cooling silo; The input end of the oil pump is communicated with the interior of the transformer box, and the output end of the cooling bin is communicated with the interior of the transformer box; The interior of the cooling chamber is provided with an exhaust component, a cooling component, and a driving component from top to bottom; The bottom of the cooling bin body is an open structure, and a support frame is provided at the bottom of the inner wall of the cooling bin body, and a central shaft is supported by a middle bearing on the top of the support frame.

[0007] As a further optimization scheme of the present invention, the input end of the oil pump is provided with an oil inlet pipe which is interconnected with the interior of the transformer box, the output end of the oil pump is provided with an oil delivery pipe, the output end of the oil delivery pipe is interconnected with the interior of the cooling bin and is provided with an oil guide pipe extending to the interior of the cooling bin, the output end of the oil guide pipe is provided with a diversion port, and the output end of the cooling bin is provided with an oil return pipe which is interconnected with the interior of the transformer box.

[0008] As a further optimization scheme of the present invention, the vacuum assembly includes several groups of return springs arranged at the top of the cooling bin body, and a piston plate is commonly provided at the bottom of the return springs. The edge position of the piston plate is sealed in contact with the inner wall of the cooling bin body, the middle part of the piston plate is passed through from top to bottom, and a one-way air valve is provided in the middle of the top of the piston plate.

[0009] As a further optimization scheme of the present invention, the top end of the central shaft is fastened with a lower wedge ring, and the middle part of the bottom of the piston plate is provided with an upper wedge ring that is compatible with the lower wedge ring. The middle parts of the lower wedge ring and the upper wedge ring are both hollow structures. The bottom of the lower wedge ring is provided with a protective spring extending to the interior of the upper wedge ring, and the longitudinal height of the protective spring is greater than the longitudinal height of the lower wedge ring and the upper wedge ring combined.

[0010] As a further optimization scheme of the present invention, the cooling component includes a guide top plate arranged on the top of the outer side of the central axis, the edge of the guide top plate is tightly and sealedly connected to the inner wall of the cooling chamber, the guide top plate is a single-layer spiral slope structure, the output end of the guide port corresponds to the top of the guide top plate slope, and a bearing seat is arranged between the middle part of the guide top plate and the outer side of the central axis.

[0011] As a further optimization scheme of the present invention, several groups of spirally arranged heat dissipation pipes are provided at the bottom of the guide top plate, the input end of the heat dissipation pipe is connected to the top of the guide top plate, and the input end of the heat dissipation pipe corresponds to the bottom position of the slope of the guide top plate, and the bottom of the heat dissipation pipe is jointly provided with a guide bin, and the bottom of the inner wall of the cooling bin is provided with a guide bottom plate, the guide bottom plate is an annular circular plate structure, and a support ring is provided on the inner side of the guide bottom plate. The cooling oil discharged from the output end of the guide bin falls into the area enclosed by the inner wall of the cooling bin, the top of the guide bottom plate and the outer side of the support ring.

[0012] As a further optimization scheme of the present invention, the drive assembly includes an inner support ring slidably supported on the top of the support ring, a central bearing seat is fastened to the outer side of the central shaft, and several groups of air flow impellers fastened to the inner wall of the inner support ring are evenly arranged on the outer side of the central bearing seat, and several groups of guide impellers are evenly arranged on the outer side of the inner support ring. The guide impellers are jointly provided with an outer support ring at one end away from the inner support ring, and the outer side of the outer support ring is rotatably fitted with the inner wall of the cooling bin body.

[0013] As a further optimization scheme of the present invention, the top of the inner support ring and the outer support ring on the side close to each other are both provided with lower grooves, and the tops of the two groups of lower grooves jointly support a support top plate. The outer side of the support top plate is fastened to the inner wall of the cooling chamber body, and a guide ring tube is provided on the inner side of the support top plate. The guide ring tube is sleeved on the outside of the central axis, and the guide ring tube is sleeved inside the innermost group of heat dissipation pipes.

[0014] As a further optimization scheme of the present invention, the blade directions of the air flow impeller and the guide impeller are opposite. The rotation of the guide impeller drives the air flow impeller to rotate and guide the external air flow into the interior of the guide ring tube. The outside of the guide ring tube is evenly provided with air flow holes.

[0015] As a further optimization scheme of the present invention, the outside of the cooling chamber is evenly provided with heat dissipation holes, the top of the outside of the cooling chamber is evenly provided with several groups of exhaust holes, the inside of the exhaust holes is connected to the top area of ​​the piston plate, and the inside of the heat dissipation holes is connected to the position area of ​​the heat dissipation pipe.

[0016] The beneficial effects of the present invention are: 1. The present invention utilizes the kinetic energy of the oil flow itself to drive the internal impeller to rotate, forming a forced airflow to efficiently cool the multi-layer spiral heat pipe. No additional power device is required, reducing energy consumption and operating costs. By converting the kinetic energy of the cooling oil, it achieves an efficient combination of the cooling oil flow power with the heat dissipation and degassing functions, significantly improving the heat dissipation efficiency and system reliability.

[0017] 2. This invention uses an air extraction component to extract and expel bubbles in real time during oil circulation, preventing their impact on insulation performance and improving transformer operational safety. The overall structure is compact and rational, achieving multi-stage heat exchange and gas-liquid separation within a limited space, enhancing the system's adaptability and stability under high-temperature and high-load conditions.

[0018] 3. The fuel tank mechanism of the present invention has the characteristics of self-drive and low maintenance, which reduces external dependence and the need for manual intervention. It is particularly suitable for harsh environments or long-term operation scenarios, and has good engineering application prospects and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention Figure 1 ; Figure 2 This is a three-dimensional schematic diagram of the overall structure of the present invention Figure 2 ; Figure 3 It is an enlarged schematic diagram of the structure of the oil cooling mechanism in the present invention; Figure 4 This is an enlarged cross-sectional view of the oil cooling mechanism of the present invention; Figure 5 This is an enlarged cross-sectional view of the internal structure of the cooling bin in the present invention; Figure 6 It is an enlarged schematic diagram of the connection structure of the components of the heat dissipation assembly in the present invention; Figure 7 It is an enlarged schematic diagram of the connection structure between the guide top plate and the heat dissipation pipe in the present invention; Figure 8 It is an enlarged schematic diagram of the connection structure of the parts of the air extraction assembly in the present invention; Figure 9 It is an enlarged schematic diagram of the connection structure of the components of the drive assembly of the present invention; Figure 10 This is an enlarged cross-sectional view of the connection structure of the components of the heat dissipation component and the drive component in the present invention; Figure 11 yes Figure 10 A magnified schematic diagram of the structure at A; Figure 12 It is an enlarged schematic diagram of the structure of the guide bottom plate in the present invention; Figure 13 It is an enlarged cross-sectional view of the connection structure of the drive assembly in the present invention.

[0020] In the picture: 100. Transformer box; 200. Oil cooling mechanism; 300. Wiring control assembly; 201, cooling chamber; 202, oil inlet pipe; 203, oil pump; 204, oil delivery pipe; 205, heat dissipation hole; 206, oil return pipe; 207, one-way air valve; 208, exhaust hole; 209, guide top plate; 210, heat dissipation pipe; 211, guide bottom plate; 212, support frame; 213, lower wedge ring; 214, piston plate; 215, return spring; 216, oil guide pipe; 217, center shaft; 218, support ring; 219, guide port; 220, upper wedge ring; 221. Guide ring cylinder; 222. Outer support ring; 223. Support top plate; 224. Protective spring; 225. Guide chamber; 226. Center bearing seat; 227. Air flow impeller; 228. Inner support ring; 229. Guide impeller. DETAILED DESCRIPTION

[0021] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed solely to enable those skilled in the art to better understand and implement the subject matter described herein, and that the functions and arrangements of the elements discussed may be varied without departing from the scope of this specification. Various examples may omit, substitute, or add various processes or components as needed. In addition, features described with respect to some examples may also be combined in other examples.

[0022] Example 1

[0023] like Figure 1 、 Figure 2 As shown, an oil-immersed transformer tank includes a transformer box 100, a wiring control assembly 300 is provided at both the front and rear ends of the transformer box 100, and an oil cooling mechanism 200 is provided on one side of the transformer box 100; like Figure 1 、 Figures 3 to 7 As shown, the oil cooling mechanism 200 includes a cooling chamber 201 that is fastened to one side of the transformer box 100 , and an oil pump 203 is provided on the top of the cooling chamber 201 ; The input end of the oil pump 203 is communicated with the interior of the transformer box 100, and the output end of the cooling chamber 201 is communicated with the interior of the transformer box 100; The input end of the oil pump 203 is provided with an oil inlet pipe 202 that communicates with the interior of the transformer tank 100. The output end of the oil pump 203 is provided with an oil delivery pipe 204. The output end of the oil delivery pipe 204 is communicated with the interior of the cooling tank 201 and is provided with an oil guide pipe 216 extending into the interior of the cooling tank 201. The output end of the oil guide pipe 216 is provided with a diversion port 219. The output end of the cooling tank 201 is provided with an oil return pipe 206 that communicates with the interior of the transformer tank 100. like Figure 1 、 Figures 3 to 7 As shown, the interior of the cooling chamber 201 is provided with an exhaust assembly, a cooling assembly, and a driving assembly from top to bottom; The bottom of the cooling chamber 201 is an open structure, and a support frame 212 is provided at the bottom of the inner wall of the cooling chamber 201. The central bearing at the top of the support frame 212 supports a central shaft 217. like Figure 6 、 Figure 7 、 Figure 9As shown, the air extraction component includes several groups of return springs 215 arranged at the top of the cooling chamber body 201, and a piston plate 214 is commonly provided at the bottom of the return spring 215. The edge of the piston plate 214 is sealed against the inner wall of the cooling chamber body 201, and the middle part of the piston plate 214 is passed through from top to bottom. A one-way air valve 207 is provided in the middle part of the top of the piston plate 214, and the top of the central shaft 217 is fastened to the lower wedge ring 213. An upper wedge ring 220 is provided in the middle part of the bottom of the piston plate 214, which is adapted to the lower wedge ring 213. The middle parts of the lower wedge ring 213 and the upper wedge ring 220 are both hollow structures. A protective spring 224 is provided at the bottom of the interior of the lower wedge ring 213, which extends to the interior of the upper wedge ring 220. The longitudinal height of the protective spring 224 is greater than the longitudinal height of the lower wedge ring 213 and the upper wedge ring 220 combined. like Figures 5 to 8 、 Figure 10 、 Figure 11 As shown, the cooling assembly includes a guide top plate 209 arranged on the top of the outer side of the central axis 217. The edge of the guide top plate 209 is tightly and sealedly connected to the inner wall of the cooling chamber 201. The guide top plate 209 is a single-layer spiral slope structure. The output end of the guide port 219 corresponds to the top of the slope of the guide top plate 209. A bearing seat is provided between the middle of the guide top plate 209 and the outer side of the central axis 217. The bottom of the guide top plate 209 is provided with a plurality of groups of spirally arranged heat pipes 210. The input end of the heat pipe 210 is connected to the guide top plate 209. The tops of the plates 209 are interconnected, and the input end of the heat pipe 210 corresponds to the bottom position of the slope of the guide top plate 209. The bottom of the heat pipe 210 is jointly provided with a guide bin 225. The bottom of the inner wall of the cooling bin body 201 is provided with a guide bottom plate 211. The guide bottom plate 211 is an annular circular plate structure. A support ring 218 is provided on the inner side of the guide bottom plate 211. The cooling oil discharged from the output end of the guide bin 225 falls into the area enclosed by the inner wall of the cooling bin body 201, the top of the guide bottom plate 211, and the outer side of the support ring 218. like Figures 10 to 13As shown, the drive assembly includes an inner support ring 228 slidably supported on the top of the support ring 218, a central bearing seat 226 is fastened to the outer side of the central shaft 217, and a plurality of groups of air flow impellers 227 that are fastened to the inner wall of the inner support ring 228 are evenly arranged on the outer side of the central bearing seat 226. A plurality of groups of guide impellers 229 are evenly arranged on the outer side of the inner support ring 228. The guide impellers 229 are away from the end of the inner support ring 228 and are jointly provided with an outer support ring 222. The outer side is rotatably fitted with the inner wall of the cooling chamber body 201. The tops of the inner support ring 228 and the outer support ring 222 on the side close to each other are both provided with lower grooves. The tops of the two sets of lower grooves jointly support a support top plate 223. The outer side of the support top plate 223 is tightly connected to the inner wall of the cooling chamber body 201. The inner side of the support top plate 223 is provided with a guide ring 221. The guide ring 221 is sleeved on the outer side of the central axis 217 and sleeved inside the innermost group of heat dissipation pipes 210. The blade directions of the air flow impeller 227 are opposite to those of the guide impeller 229. The rotation of the guide impeller 229 drives the air flow impeller 227 to rotate and guide the external air flow into the interior of the guide ring tube 221. The outside of the guide ring tube 221 is evenly provided with air flow holes, the outside of the cooling chamber 201 is evenly provided with heat dissipation holes 205, and the top of the outside of the cooling chamber 201 is evenly provided with several groups of exhaust holes 208. The interior of the exhaust holes 208 is connected to the top area of ​​the piston plate 214, and the interior of the heat dissipation holes 205 is connected to the position area of ​​the heat pipe 210.

[0024] The oil-immersed transformer tank proposed in this embodiment is used as follows: when the transformer tank is in use, the interior thereof is filled with cooling oil for cooling; During the use of the transformer, the transformer core inside the transformer box 100 is heat-exchanged by the cooling oil, thereby achieving the purpose of heat dissipation; The oil pump 203 is started to extract the high-temperature cooling oil from the transformer box 100 and then transported to the interior of the cooling chamber 201 through the oil pipe 204; The high-temperature cooling oil is then introduced into the interior of the cooling chamber 201 through the oil guide pipe 216 and is directed to the top of the guide top plate 209 from the position of the guide port 219. At this time, the high-temperature cooling oil introduced into the top of the guide top plate 209 spirally flows downward through the spiral inclined surface structure of the guide top plate 209 to the input end of the heat dissipation pipe 210. Then, the high-temperature cooling oil enters the interior of the guide chamber 225 through the spiral guiding action of the heat dissipation pipe 210 and is discharged through the guide chamber 225; The cooling oil discharged through the guide chamber 225 has the potential energy of gravity due to falling and the driving energy during the extraction process of the oil pump 203, thereby causing the cooling oil to generate a driving force on the guide vane 229 below it, causing the guide vane 229 to rotate. The rotation of the guide vane 229 drives the outer support ring 222 and the inner support ring 228 to rotate synchronously, and the bottom of the inner support ring 228 is supported by the support ring 218, thereby ensuring that the inner support ring 228 can rotate stably. The support top plate 223 acts as a baffle, thereby preventing the cooling oil sprayed through the guide chamber 225 from overflowing to the outside of the outer support ring 222 and the inner support ring 228; Furthermore, the rotation of the inner support ring 228 drives the air flow impeller 227 to rotate accordingly, and the air flow impeller 227 generates an air flow propulsion effect, so that the air flow outside the cooling chamber 201 enters the area of ​​the air flow impeller 227 through the bottom of the cooling chamber 201, and is guided to the interior of the guide ring 221 by the propulsion of the air flow impeller 227. The airflow is pushed into the interior of the guide ring 221 and evacuated to the outer area of ​​the heat dissipation pipe 210 through the air flow holes on the outside of the guide ring 221. The airflow then dissipates heat from the heat dissipation pipe 210. The heat in the cooling oil absorbed by the heat dissipation pipe 210 is accelerated and discharged from the heat dissipation holes 205, thereby achieving the function of dissipating heat from the high-temperature cooling oil. As the air flow impeller 227 rotates, the central shaft 217 in the middle of the central bearing seat 226 is driven to rotate accordingly. The rotation of the central shaft 217 further drives the rotation of the lower wedge ring 213. The rotation of the lower wedge ring 213 squeezes the upper wedge ring 220 to follow the displacement. The top of the upper wedge ring 220 is restricted by the piston plate 214 and cannot rotate. As the lower wedge ring 213 rotates, the upper wedge ring 220 is pushed to move upward, thereby causing the piston plate 214 to move upward synchronously. The upward displacement of the piston plate 214 compresses the return spring 215. At this time, as the piston plate 214 moves upward, the area between the piston plate 214 and the guide top plate 209 increases, and the air pressure decreases, so that a negative pressure state is formed in the area, and the bubbles contained in the cooling oil flowing on the top of the guide top plate 209 are sucked out, thereby reducing the impact of the bubbles in the cooling oil on the battery cells inside the transformer box 100; During the upward displacement of the piston plate 214, the one-way valve 207 is also closed by the atmospheric pressure at its top. As the lower wedge ring 213 continues to rotate, the wedge-shaped misalignment between the upper wedge ring 220 and the lower wedge ring 213 reaches a cycle position. At this time, the lower wedge ring 213 no longer pushes the upper wedge ring 220. Under the action of the rebound force of the return spring 215, the piston plate 214 is pushed downward as a whole, thereby synchronously causing the upper wedge ring 220 to move downward and engage with the lower wedge ring 213 again. However, due to the height limit of the protective spring 224, the hard collision problem between the lower wedge ring 213 and the upper wedge ring 220 is avoided. Furthermore, during the downward displacement of the piston plate 214, the piston plate 214 moves rapidly, thereby compressing the airflow in the top area of ​​the guide top plate 209. The compressed airflow pushes open the closed function of the one-way air valve 207, thereby causing the airflow in the top area of ​​the guide top plate 209 to be discharged from the top area of ​​the piston plate 214, thereby ensuring that the gas extracted from the cooling oil is discharged from the area of ​​the guide top plate 209. The airflow discharged to the top area of ​​the piston plate 214 is communicated with the outside atmosphere through the exhaust through-hole 208 and then dispersed into the outside atmosphere; Furthermore, through the coordinated use of the above components, the heat dissipation effect of the transformer cooling oil is achieved. At the same time, the kinetic potential energy and gravitational potential energy of the cooling oil flow are utilized to drive the piston plate 214 to move, thereby extracting the bubbles in the cooling oil and realizing the bubble removal function of the cooling oil. Furthermore, as the cooling air delivered by the air flow impeller 227 exchanges heat with the heat dissipation pipe 210, the heat absorbed by the cooling oil in the heat dissipation pipe 210 is quickly dissipated, thereby improving the heat dissipation efficiency of the cooling oil.

[0025] The above describes the specific implementation methods of the embodiments of the present invention, but the embodiments of the present invention are not limited to the above specific implementation methods. The above specific implementation methods are merely illustrative and not restrictive. Ordinary technicians in this field can also make many forms based on the inspiration of the embodiments of the present invention, all of which are protected by the embodiments of the present invention.

Claims

1. An oil-immersed transformer tank, comprising a transformer box (100), wherein both front and rear ends of the transformer box (100) are provided with a wiring control assembly (300), characterized in that: An oil cooling mechanism (200) is provided on one side of the transformer box (100); The oil cooling mechanism (200) comprises a cooling bin (201) that is fastened to one side of the transformer box (100), and an oil pump (203) is provided on the top of the cooling bin (201); The input end of the oil pump (203) is in communication with the interior of the transformer box (100), and the output end of the cooling chamber (201) is in communication with the interior of the transformer box (100); The interior of the cooling bin (201) is provided with an air extraction component, a cooling component, and a driving component from top to bottom respectively; The bottom of the cooling bin body (201) is an open structure, and a support frame (212) is provided at the bottom of the inner wall of the cooling bin body (201), and a central bearing at the top of the support frame (212) supports a central shaft (217).

2. The oil-immersed transformer tank according to claim 1, characterized in that: The input end of the oil pump (203) is provided with an oil inlet pipe (202) that is interconnected with the interior of the transformer box (100); the output end of the oil pump (203) is provided with an oil delivery pipe (204); the output end of the oil delivery pipe (204) is interconnected with the interior of the cooling bin (201) and is provided with an oil guide pipe (216) extending into the interior of the cooling bin (201); the output end of the oil guide pipe (216) is provided with a flow guide port (219); and the output end of the cooling bin (201) is provided with an oil return pipe (206) that is interconnected with the interior of the transformer box (100).

3. The oil-immersed transformer tank according to claim 1, characterized in that: The vacuum assembly includes a plurality of return springs (215) arranged at the top of the cooling chamber body (201), and a piston plate (214) is provided at the bottom of the return springs (215). The edge of the piston plate (214) is sealed against the inner wall of the cooling chamber body (201), the middle of the piston plate (214) is connected from top to bottom, and a one-way air valve (207) is provided in the middle of the top of the piston plate (214).

4. The oil-immersed transformer tank according to claim 3, characterized in that: The top end of the central shaft (217) is fastened with a lower wedge ring (213), and the middle portion of the bottom of the piston plate (214) is provided with an upper wedge ring (220) adapted to the lower wedge ring (213). The middle portions of the lower wedge ring (213) and the upper wedge ring (220) are both hollow structures. The bottom of the interior of the lower wedge ring (213) is provided with a protective spring (224) extending into the interior of the upper wedge ring (220), and the longitudinal height of the protective spring (224) is greater than the longitudinal height of the lower wedge ring (213) and the upper wedge ring (220) after being combined.

5. The oil-immersed transformer tank according to claim 1 or 2, characterized in that: The cooling assembly includes a guide top plate (209) arranged on the top of the outer side of the central axis (217), the edge of the guide top plate (209) is tightly and sealedly connected to the inner wall of the cooling chamber (201), the guide top plate (209) is a single-layer spiral slope structure, the output end of the guide port (219) corresponds to the top of the slope of the guide top plate (209), and a bearing seat is provided between the middle of the guide top plate (209) and the outer side of the central axis (217).

6. The oil-immersed transformer tank according to claim 5, characterized in that: The bottom of the guide top plate (209) is provided with a plurality of groups of spirally arranged heat dissipation pipes (210), the input end of the heat dissipation pipe (210) is communicated with the top of the guide top plate (209), and the input end of the heat dissipation pipe (210) corresponds to the bottom position of the slope of the guide top plate (209), the bottom of the heat dissipation pipe (210) is provided with a guide bin (225), the bottom of the inner wall of the cooling bin body (201) is provided with a guide bottom plate (211), the guide bottom plate (211) is an annular circular plate structure, and the inner side of the guide bottom plate (211) is provided with a support ring (218), and the cooling oil discharged from the output end of the guide bin (225) falls into the area enclosed by the inner wall of the cooling bin body (201), the top of the guide bottom plate (211) and the outer side of the support ring (218).

7. The oil-immersed transformer tank according to claim 6, characterized in that: The driving assembly includes an inner support ring (228) slidably supported on the top of the support ring (218), a center bearing seat (226) is fastened to the outer side of the center shaft (217), a plurality of groups of air flow impellers (227) fastened to the inner wall of the inner support ring (228) are evenly arranged on the outer side of the center bearing seat (226), a plurality of groups of guide impellers (229) are evenly arranged on the outer side of the inner support ring (228), an outer support ring (222) is commonly provided at one end of the guide impeller (229) away from the inner support ring (228), and the outer side of the outer support ring (222) is rotatably fitted with the inner wall of the cooling chamber (201).

8. The oil-immersed transformer tank according to claim 7, characterized in that: The inner support ring (228) and the outer support ring (222) are both provided with lower grooves on the top of the side close to each other, and the tops of the two groups of lower grooves jointly support a support top plate (223), the outer side of the support top plate (223) is fastened to the inner wall of the cooling chamber (201), and the inner side of the support top plate (223) is provided with a guide ring tube (221), the guide ring tube (221) is sleeved on the outer side of the central axis (217), and the guide ring tube (221) is sleeved inside the innermost group of heat dissipation pipes (210).

9. The oil-immersed transformer tank according to claim 8, characterized in that: The blades of the air flow impeller (227) and the guide impeller (229) are in opposite directions. The rotation of the guide impeller (229) drives the air flow impeller (227) to rotate, thereby introducing the external air flow into the interior of the guide ring cylinder (221). The exterior of the guide ring cylinder (221) is evenly provided with air flow holes.

10. The oil-immersed transformer tank according to claim 9, characterized in that: The outside of the cooling chamber (201) is evenly provided with heat dissipation holes (205), and the top of the outside of the cooling chamber (201) is evenly provided with a plurality of exhaust holes (208), the inside of the exhaust holes (208) is connected to the top area of ​​the piston plate (214), and the inside of the heat dissipation holes (205) is connected to the position area of ​​the heat dissipation pipe (210).

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