A transformer oil tank

Abstract

The application discloses a transformer oil tank and relates to the technical field of power transformers, which comprises an oil tank body and multiple groups of fin mechanisms, each group of fin mechanisms comprising heat dissipation fins with cavities formed inside. The application can flexibly adjust the effective oil storage volume of the heat dissipation fins according to the ambient temperature by arranging the heat dissipation fins with cavities outside the oil tank body and cooperating with the slidable adjusting plate and the driving assembly. In a non-low-temperature environment, the maximum heat dissipation area is ensured to efficiently dissipate heat, and in a low-temperature environment, the heat dissipation contact area is reduced to avoid the wax precipitation and viscosity increase of the cooling oil due to excessive cooling, so that the insulation performance and the circulating flowability of the cooling oil are maintained. The circulating stirring mechanism is driven by the driving mechanism to promote the efficient circulation of the cooling oil between the oil tank and the fins, thereby further improving the heat dissipation efficiency. The overall structure solves the problems of heat dissipation and insulation performance of the oil-immersed transformer in a low-temperature environment through the cooperation of multiple components, and improves the operation reliability and environmental adaptability of the equipment.

Description

Technical Field

[0001] This invention relates to the field of power transformer technology, specifically to a transformer oil tank. Background Technology

[0002] In power transmission and distribution systems, oil-immersed transformers are core equipment, and their operational stability and heat dissipation efficiency are directly related to the safe and reliable operation of the power system. In existing technologies, the outer side of the oil tank of an oil-immersed transformer is usually equipped with multiple sets of heat dissipation fins. The space formed inside the fin structure is interconnected with the inside of the oil tank, forming a closed circulation system. The system is filled with cooling oil, usually mineral oil or synthetic oil. Through natural convection or forced circulation of the cooling oil between the oil tank and the fins, the heat generated by the transformer core and windings is transferred to the external environment. Specifically, the high-temperature cooling oil that has absorbed heat flows into the interior of the fins, and the heat is dissipated by the large-area contact between the fins and the air. The cooled cooling oil then flows back to the oil tank, thereby continuously maintaining the normal operating temperature of the transformer.

[0003] However, when such oil-immersed transformers are used in low-temperature areas, such as frigid regions or extreme low-temperature environments in winter, the low-temperature environment will cause adverse changes in the physical properties of the cooling oil. For example, low-temperature conditions will cause solid substances such as waxes dissolved in the cooling oil to precipitate. These precipitates will not only adhere to the inner wall of the fins and the surface of the insulating components inside the oil tank, causing partial blockage of the heat dissipation channels and further hindering oil circulation, but will also directly damage the insulation performance of the cooling oil. The presence of solid precipitates may cause problems such as a decrease in oil breakdown field strength and an increase in partial discharge. In severe cases, it may even threaten the insulation safety of the transformer, shorten the service life of the equipment, and increase the operation and maintenance costs and failure risks of the power system.

[0004] Therefore, there is a lack of effective solutions in the existing technology for the deterioration of heat dissipation efficiency and insulation performance of oil-immersed transformers due to the precipitation of wax and increased viscosity of cooling oil in low-temperature environments. There is an urgent need for an optimized heat dissipation structure that can adapt to low-temperature operating conditions and ensure the stable performance of cooling oil. Summary of the Invention

[0005] Therefore, the purpose of this invention is to provide a transformer oil tank to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a transformer oil tank, comprising: The oil tank body is used to hold cooling oil and support the internal components of the transformer. Multiple finned mechanisms are equidistantly arranged on both sides of the outer side of the oil tank body. Each finned mechanism includes heat dissipation fins that form a cavity inside. The cavity is interconnected with the inside of the oil tank body, and the cooling oil can circulate therein to dissipate heat. The heat dissipation fins are evenly and equidistantly distributed on both sides of the oil tank body. The adjustment plate is adapted to the inner wall of the heat dissipation fin cavity, and the edge of the adjustment plate is provided with a sealing structure. This ensures smooth sliding of the adjustment plate, reduces cooling oil leakage, and ensures the accuracy of heat dissipation area adjustment. The heat dissipation fins adopt a rectangular thin plate structure, which is formed by precision bending process. The joints are fully welded to ensure the sealing performance of the cavity and prevent the cooling oil from leaking and affecting the heat dissipation efficiency and the safety of equipment operation. Two sets of circulating stirring mechanisms are located on both sides of the bottom of the oil tank body to promote the circulation of cooling oil between the oil tank body and the heat dissipation fins; The circulating stirring mechanism includes a stirring drum, and multiple sets of first blades and multiple sets of second blades disposed on the outside of the stirring drum. The first driving mechanism includes a first motor, a first worm gear assembly, and a rotating shaft. The rotating shaft drives the stirring drum to rotate under the transmission of the first motor and the first worm gear assembly. The rotation of the first blade can drive the cooling oil on both sides of the bottom of the oil tank body to the center and converge. The second blade can extend into the cavity inside the heat dissipation fins to discharge the cooling oil in the heat dissipation fins and guide it into the oil tank body, thereby enhancing the circulation efficiency of the cooling oil. The first drive mechanism is connected to the circulating stirring mechanism and is used to drive the circulating stirring mechanism to operate; The adjustment assembly includes an adjustment plate disposed in the cavity of the heat dissipation fins, and a second drive mechanism for driving the adjustment plate to slide in the cavity. The sliding of the adjustment plate can change the effective oil storage volume of the heat dissipation fin cavity, thereby adjusting the contact area between the cooling oil and the heat dissipation fins to adjust the heat dissipation effect. The second drive mechanism includes a second motor, a second worm gear assembly, and a winding shaft. The adjustment assembly also includes a first rope, a second rope, and pull plates fixed on both sides of the adjustment plate. The first rope and the second rope are respectively connected to the pull plates on both sides of the adjustment plate. The winding shaft is movably connected inside the oil tank body and rotates forward and backward under the transmission action of the second motor and the second worm gear assembly to realize the winding or unwinding of the first rope and the second rope, thereby driving the adjustment plate to slide back and forth in the heat dissipation fin cavity and precisely change the effective oil storage volume of the heat dissipation fin cavity. The air supply component is connected to the inside of the heat sink fins and can balance the pressure inside the heat sink fins caused by volume changes when the adjustment plate slides. The air supply assembly includes an air supply tube, an external tube, a connecting tube, a central tube, an extension tube, and a breathing valve; The air supply pipe connects the inside of the heat dissipation fins to the external pipe, the connecting pipe connects the external pipe to the central pipe, and the extension pipe connects the central pipe to the breather valve. When the adjustment plate slides and causes the pressure inside the heat dissipation fin cavity to change, the breather valve supplies gas to the cavity to maintain pressure balance. The external tube is fixed to the outside of the heat dissipation fins, and the second rope is located inside the external tube. The two ends of the second rope pass through the two ends of the external tube and extend to the heat dissipation fins and the inside of the oil tank body, respectively. The external tube has an internal cavity for accommodating the second rope, and the diameter of the cavity is larger than the diameter of the second rope, which is used for gas flow. The air supply component also includes an oil tank and an air inlet pipe. The air inlet pipe connects the breather valve and the oil tank. The breather valve is equipped with a drying and filtering component to dry and filter the gas supplied to the heat sink fin cavity and the oil tank, preventing moisture and impurities from affecting the insulation performance of the cooling oil and the normal operation of the regulating component. The oil storage tank is connected to the inside of the oil tank body through a pipe, and a solenoid valve is installed on the pipe. The opening and closing of the solenoid valve can precisely control the flow of cooling oil between the oil storage tank and the oil tank body, realize the on-demand replenishment of cooling oil, and ensure the stability of the cooling oil level in the oil tank body. The adjustment assembly also includes limit rollers, take-up roller shafts and support shafts. Multiple sets of limit rollers are set on the outside of the support shaft to guide the first and second ropes. The support shaft is located inside the oil tank body and is rotatably connected to the oil tank body. The take-up roller shaft rotates under the drive of the take-up shaft to enhance the stability of the first and second ropes during the take-up and take-up process and avoid tilting or jamming when the adjustment plate slides. Guide plates are fixed on both sides inside the fuel tank body, and guide holes are evenly opened on the guide plates to match the multiple sets of first ropes. Each group of first ropes is connected to the adjustment plate after passing through the corresponding guide hole. This can precisely constrain the traction direction of the first rope, preventing it from getting tangled or interfering with the internal components of the fuel tank during the winding and unwinding process, and ensuring the stability of the sliding adjustment of the adjustment plate.

[0007] In summary, the present invention has the following advantages: By setting cavitary heat dissipation fins on the outside of the oil tank body and cooperating with a sliding adjustment plate and drive assembly, the present invention can flexibly adjust the effective oil storage volume of the heat dissipation fins according to the ambient temperature. In non-low temperature environments, it ensures the maximum heat dissipation area for efficient heat dissipation, and in low temperature environments, it reduces the heat dissipation contact area to avoid wax precipitation and increased viscosity of the cooling oil due to excessive cooling, thereby maintaining its insulation performance and circulation fluidity. The circulation stirring mechanism, driven by the drive mechanism, can promote the efficient circulation of cooling oil between the oil tank and the fins, further improving the heat dissipation efficiency. The air replenishment component can balance the internal pressure of the fins when the regulating plate slides, preventing jamming or seal damage caused by abnormal pressure. The drying and filtering function of the breather valve can prevent moisture and impurities from affecting the system operation. The cooperation between the oil tank and the solenoid valve can realize the replenishment of cooling oil as needed, ensuring stable liquid level. The overall structure, through the collaboration of multiple components, effectively solves the heat dissipation and insulation performance problems of oil-immersed transformers in low-temperature environments, improving the reliability of equipment operation and environmental adaptability. Attached Figure Description

[0008] Figure 1 This is a three-dimensional structural diagram of the entire invention; Figure 2 This is a cross-sectional view of the entire invention; Figure 3 For the present invention Figure 2 Enlarged view of point A; Figure 4 For the present invention Figure 2 Enlarged view of point B; Figure 5 For the present invention Figure 2 Enlarged view of point C; Figure 6 This is a partial structural diagram of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of point D; Figure 8 This is an enlarged cross-sectional view of the fin mechanism of the present invention; Figure 9 For the present invention Figure 8 Enlarged view of point E; Figure 10 For the present invention Figure 8 Enlarged view at point F; Figure 11 For the present invention Figure 8 Enlarged view of point G.

[0009] In the diagram: 1. Oil tank body; 2. Fin mechanism; 201. Heat dissipation fins; 202. Cavity; 203. Adjustment plate; 204. Pulling plate; 205. First rope; 206. Second rope; 207. External pipe; 208. Pipe cavity; 3. Circulating stirring mechanism; 301. Stirring drum; 302. First blade; 303. Second blade; 4. First drive mechanism; 401. First motor; 402. First worm gear assembly; 403. Rotating shaft; 5. Second drive mechanism; 501. Second motor; 502. Second worm gear assembly; 503. Rewinding shaft; 6. Limiting roller; 7. Rewinding roller shaft; 8. Support shaft; 9. Guide plate; 10. Air supply pipe; 11. Central pipe; 12. Connecting pipe; 13. Extension pipe; 14. Air inlet pipe; 15. Breathing valve; 16. Oil storage tank; 17. Solenoid valve. Detailed Implementation

[0010] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0011] The embodiments of the present invention will now be described. Example

[0012] A transformer oil tank, such as Figure 1-11 As shown, it includes: Oil tank body 1: It is made of metal sheet welded into shape. The interior is used to hold cooling oil and core components such as transformer core and windings, providing a sealed space for the entire equipment.

[0013] Fin mechanism 2: Multiple sets of heat dissipation fins 201 are equidistantly distributed on both sides of the outer side of the oil tank body 1. Each set of heat dissipation fins 201 forms a cavity 202 inside, and the cavity 202 is interconnected with the inside of the oil tank body 1. Cooling oil can circulate between the two. Heat dissipation is achieved through heat exchange between the heat dissipation fins 201 and the outside air. The heat dissipation fins 201 adopt a rectangular thin plate structure and are formed by precision bending process. The joints are fully welded to ensure the sealing performance of the cavity 202 and prevent cooling oil leakage.

[0014] Adjustment assembly: includes an adjustment plate 203 disposed in the cavity 202 of the heat dissipation fins 201, a pull piece 204 fixed on both sides of the adjustment plate 203, a first rope 205 and a second rope 206 connecting the pull piece 204, and a second drive mechanism 5 for driving the adjustment plate 203 to slide; the second drive mechanism 5 consists of a second motor 501, a second worm gear assembly 502 and a winding shaft 503, the winding shaft 503 is movably connected to the inside of the oil tank body 1, and realizes the winding or unwinding of the first rope 205 and the second rope 206 by forward and reverse rotation, thereby driving the adjustment plate 203 to slide back and forth in the cavity 202; The adjusting plate 203 is adapted to the inner wall of the cavity 202, and the edge is provided with a sealing structure to reduce cooling oil leakage during sliding. In addition, the adjusting assembly also includes a limiting roller 6, a take-up roller 7, and a support shaft 8. Multiple sets of limiting rollers 6 are located on the outside of the support shaft 8 to guide the first rope 205, while the external tube 207 guides the second rope 206. The support shaft 8 is rotatably connected to the oil tank body 1, and the take-up roller 7 rotates under the drive of the take-up shaft 503 to enhance the stability of rope winding and unwinding. Guide plates 9 are also fixed on both sides inside the oil tank body 1. The guide plates 9 are provided with guide holes that are adapted to multiple sets of first ropes 205. After the first rope 205 passes through the corresponding guide hole, it is connected to the adjusting plate 203 to ensure accurate traction direction.

[0015] The circulating stirring mechanism 3 is located on both sides of the bottom of the oil tank body 1, including a stirring cylinder 301 and multiple sets of first blades 302 and multiple sets of second blades 303 disposed on the outside of the stirring cylinder 301, which are used to promote the circulation of cooling oil between the oil tank body 1 and the heat dissipation fins 201; the first drive mechanism 4 is connected to the circulating stirring mechanism 3, and is composed of a first motor 401, a first worm gear assembly 402 and a rotating shaft 403, which drives the stirring cylinder 301 to rotate under the transmission action.

[0016] Air supply assembly: includes air supply pipe 10, external pipe 207, connecting pipe 12, central pipe 11, extension pipe 13, breather valve 15, oil tank 16 and air inlet pipe 14; air supply pipe 10 connects the inside of heat dissipation fins 201 to external pipe 207, connecting pipe 12 connects external pipe 207 to central pipe 11, extension pipe 13 connects central pipe 11 to breather valve 15, and air inlet pipe 14 connects breather valve 15 to oil tank 16; An external tube 207 is fixed to the outside of the heat dissipation fins 201 and has a pipe cavity 208 inside. A second rope 206 is located inside the pipe cavity 208 and its two ends extend to the heat dissipation fins 201 and the oil tank body 1, respectively. The diameter of the pipe cavity 208 is larger than the diameter of the second rope 206 to allow for gas flow. The breather valve 15 has a built-in drying and filtering component. The oil storage tank 16 is connected to the inside of the oil tank body 1 through a pipe, and a solenoid valve 17 is provided on the pipe.

[0017] Work process Operating status in non-low temperature environments When the oil tank body 1 is in a non-low temperature environment, the adjustment plate 203 is located at the inner limit position of the heat dissipation fins 201. At this time, the cavity 202 inside the heat dissipation fins 201 is in the maximum oil storage state, and the cooling oil fully fills the cavity 202, forming the maximum contact area with the inner wall of the heat dissipation fins 201.

[0018] Simultaneously, the first drive mechanism 4 starts operating, and through the sequential transmission of the first motor 401, the first worm gear assembly 402, and the rotating shaft 403, the rotating shaft 403 drives the circulating stirring mechanism 3 to rotate on one side of the bottom of the oil tank body 1. When the stirring drum 301 rotates, it synchronously drives multiple sets of first blades 302 and multiple sets of second blades 303 on the outer side to rotate together. The rotation of the first blades 302 forms a guiding driving force on the cooling oil on both sides of the bottom of the oil tank body 1, causing the cooling oil to converge from both sides to the central area. Multiple sets of second blades 303 extend into the cavity 202 inside the corresponding heat dissipation fins 201, and with the help of rotation, discharge the cooling oil in the cavity 202 and guide it into the oil tank body 1. In conjunction with this, the high-temperature cooling oil that has absorbed heat at the top of the oil tank body 1 flows into the cavity 202 from the upper inlet of the heat dissipation fins 201, forming a complete cooling circulation loop. Through efficient heat exchange, the heat in the oil tank body 1 is quickly removed, ensuring the heat dissipation efficiency of the transformer under normal load or high-temperature conditions.

[0019] Operating status in low temperature environment When the oil tank body 1 is in a low temperature environment, after monitoring by the temperature sensor, the second drive mechanism 5 starts to run. Through the sequential transmission of the second motor 501, the second worm gear assembly 502 and the winding shaft 503, the winding shaft 503 drives multiple sets of winding roller shafts 7 to rotate.

[0020] At this time, multiple sets of winding shafts 503 rotate in the forward direction, with one end winding the first rope 205 and the other end simultaneously unwinding the second rope 206. Under the traction of the first rope 205 and the cooperation of the second rope 206, the adjusting plate 203 slides along the cavity 202 of the heat dissipation fins 201 towards the oil tank body 1, thereby reducing the effective oil storage volume of the cavity 202 and correspondingly reducing the contact area between the cooling oil and the heat dissipation fins 201. This reduces the overall heat dissipation efficiency, prevents the cooling oil from experiencing a sudden temperature drop due to excessive heat dissipation, prevents the precipitation of solid substances such as wax and the increase in viscosity, and maintains the physical stability and insulation performance of the cooling oil.

[0021] During this process, when the regulating plate 203 is displaced within the cavity 202, the space inside each set of heat dissipation fins 201 located on one side of the regulating plate 203 is connected to the external pipe 207 via the air supply pipe 10. Multiple sets of external pipes 207 form a through structure with the central pipe 11 via the connecting pipe 12. The central pipe 11 is connected to the breathing valve 15 via the extension pipe 13. When the regulating plate 203 slides, causing a change in pressure within the cavity 202, the breathing valve 15 supplies gas to the space on that side through the air supply channel formed by the air supply pipe 10, external pipe 207, connecting pipe 12, central pipe 11, and extension pipe 13, thereby balancing the pressure inside the heat dissipation fins 201 in real time and preventing the regulating plate 203 from jamming or the cavity 202 sealing structure from being damaged due to abnormal local pressure.

[0022] Meanwhile, the breather valve 15 is connected to the oil tank 16 through the air inlet pipe 14, which can replenish the gas in the upper space inside the oil tank 16. The built-in drying and filtering component of the breather valve 15 dries and filters the replenished gas, ensuring that the gas entering the heat sink fins 201 and the oil tank 16 is dry and free of impurities, preventing moisture and impurities from affecting the insulation performance of the cooling oil and the normal operation of the regulating components. If it is necessary to replenish the cooling oil in the oil tank body 1, the opening and closing of the solenoid valve 17 can be controlled to realize the flow of cooling oil between the oil tank 16 and the oil tank body 1, ensuring the stability of the cooling oil level in the oil tank body 1.

[0023] Reset process of adjustment plate 203 When the ambient temperature rises and there is no need to suppress heat dissipation, the winding shaft 503 rotates in the opposite direction, switching to the second rope 206 winding while the first rope 205 unwinds, driving the adjusting plate 203 to reset away from the oil tank body 1, so that the cavity 202 returns to the maximum oil storage state, and the system switches back to the high-efficiency heat dissipation mode.

[0024] Through the above structure and operation process, the transformer oil tank of the present invention can adapt to different ambient temperatures, and can effectively ensure the stability of the cooling oil performance, especially in low temperature environments, thereby improving the reliability of transformer operation.

[0025] The working principle of the present invention is as follows: multiple sets of finned mechanisms 2 are evenly and equidistantly connected on both sides of the oil tank body 1. The finned mechanism 2 is composed of heat dissipation fins 201. The cavity 202 inside the heat dissipation fins 201 is interconnected with the oil tank body 1. Then, cooling oil is filled into the internal space of the oil tank body 1 and the multiple cavities 202 to achieve the heat dissipation effect. Specifically, when the tank body 1 is in a non-low temperature environment, the regulating plate 203 is located at the inner limit position of the heat dissipation fins 201. At this time, the cavity 202 inside the heat dissipation fins 201 is in the maximum oil storage state. In this state, the cooling oil can fully fill the cavity 202 of the heat dissipation fins 201 and form the maximum contact area with the inner wall of the heat dissipation fins 201. This not only accelerates the circulation rate of the cooling oil in the heat dissipation fins 201, but also quickly removes the heat in the tank body 1 through the efficient heat exchange between the heat dissipation fins 201 and the outside air. This ensures the heat dissipation efficiency of the oil-immersed transformer under normal load or high temperature conditions, avoids abnormal rise in cooling oil temperature due to heat accumulation, and maintains the physical stability and insulation performance of the cooling oil. Furthermore, in this state, the first drive mechanism 4 starts to run, and through the sequential transmission of the first motor 401, the first worm gear assembly 402 and the rotating shaft 403, the rotating shaft 403 transmits the driving force to the circulating stirring mechanism 3, so that it can rotate on one side of the bottom of the oil tank body 1. Specifically, during the rotation of the stirring drum 301, multiple sets of first blades 302 and multiple sets of second blades 303 arranged on its outer side rotate in tandem. The rotational motion of the first blades 302 can guide the cooling oil on both sides of the bottom of the oil tank body 1, causing the cooling oil to converge from both sides to the central area. At the same time, multiple sets of second blades 303 extend into the cavity 202 inside the corresponding heat dissipation fins 201. With the help of the rotation of the second blades 303, the cooling oil in the cavity 202 of the heat dissipation fins 201 can be effectively discharged and guided into the oil tank body 1. In conjunction with this, the high-temperature cooling oil that has absorbed heat at the top of the oil tank body 1 flows into the cavity 202 from the upper inlet of the heat dissipation fins 201, thereby constructing a complete and efficient cooling circulation loop. When the tank body 1 is in a low temperature environment, under the monitoring of the temperature sensor, the second drive mechanism 5 starts to run. Through the sequential transmission of the second motor 501, the second worm gear assembly 502 and the winding shaft 503, the winding shaft 503 transmits the driving force to multiple sets of winding rollers 7 to make them rotate. At this time, multiple sets of winding shafts 503 rotate in the forward direction. One end of the winding shaft 503 winds up the first rope 205. Through the traction of the first rope 205, the adjusting plate 203 slides along the cavity 202 of the heat dissipation fins 201 and moves towards the oil tank body 1 for adjustment. This process reduces the effective oil storage volume of cavity 202 and correspondingly reduces the contact area between cooling oil and heat dissipation fins 201, thereby reducing the overall heat dissipation efficiency. This adjustment mechanism can effectively suppress excessive heat dissipation of cooling oil in low-temperature environments. When the ambient temperature is too low, cooling oil is prone to precipitate waxy solid substances due to a sudden drop in temperature, which leads to an increase in viscosity. By reducing the heat dissipation contact area, the cooling oil can be kept in a relatively stable temperature range, avoiding the deterioration of its physical properties and affecting the insulation effect and circulation flow. At the same time, when the adjusting plate 203 moves closer to the oil tank body 1 to reduce the volume of the cavity 202, the other end of the winding shaft 503 simultaneously performs an unwinding operation on the second rope 206. Since the end of the second rope 206 is fixedly connected to the other side of the adjusting plate 203, this coordinated action of winding and unwinding can provide stable bidirectional traction for the adjusting plate 203, effectively preventing it from tilting, jamming, or mechanically interfering with the inner wall of the cavity 202 due to unilateral force during the sliding process, ensuring the smoothness and accuracy of the adjustment process. Specifically, the proximal ends of the first rope 205 and the second rope 206 are respectively fixed to the two end faces of the adjusting plate 203, forming a symmetrical traction structure. When the winding shaft 503 rotates in the forward direction, the first rope 205 winds up while the second rope 206 unwinds simultaneously, driving the adjusting plate 203 to move closer to the oil tank body 1. When the winding shaft 503 rotates in the reverse direction, the second rope 206 winds up while the first rope 205 unwinds simultaneously, driving the adjusting plate 203 to reset away from the oil tank body 1. By alternating forward and reverse rotation of the rewind shaft 503, the reciprocating movement of the adjustment plate 203 within the cavity 202 can be adjusted, thereby flexibly changing the effective oil storage volume of the heat dissipation fins 201 and precisely adapting to the heat dissipation requirements under different ambient temperatures. Especially in low-temperature environments, the heat loss of the cooling oil can be reduced by decreasing the contact area, avoiding problems such as wax precipitation and abnormal viscosity increase due to excessively low temperatures, thus ensuring the insulation performance and circulation fluidity of the cooling oil. Furthermore, when the adjustment plate 203 is displaced within the cavity 202 of the heat dissipation fins 201, the space inside each heat dissipation fin 201 located on one side of the adjustment plate 203 is connected to the external pipe 207 via the air supply pipe 10, and multiple external pipes 207 are connected to the central pipe 11 via the connecting pipe 12 to form a through structure, and one end of the central pipe 11 is connected to the breathing valve 15 via the extension pipe 13. The design of this gas flow path is of great importance. When the regulating plate 203 moves towards or away from the oil tank body 1, the space on the side of the regulating plate 203 away from the oil tank body 1 will experience pressure changes due to volume changes. At this time, through the gas supply channel formed by the gas supply pipe 10, external pipe 207, connecting pipe 12, central pipe 11 and extension pipe 13, the breathing valve 15 can supply gas to the space on this side, thereby balancing the pressure inside the heat dissipation fins 201 in real time and avoiding the regulating plate 203 from jamming or the cavity 202 sealing structure from being damaged due to local pressure abnormalities. Meanwhile, the breather valve 15 is also connected to the oil reservoir 16 through the air inlet pipe 14. This design enables the breather valve 15 to simultaneously replenish the gas in the upper space inside the oil reservoir 16. More importantly, the breather valve 15 has a built-in drying and filtering component, such as silica gel desiccant and a precision filter screen, which can deeply treat the incoming gas to ensure that the gas replenished to the heat dissipation fins 201 and the oil reservoir 16 is dry and free of impurities. This not only prevents moisture from mixing into the cooling oil and causing a decrease in its insulation performance, but also prevents impurities from entering the regulating mechanism and causing jamming. Thus, while ensuring pressure balance, it further improves the operational reliability of the entire cooling system.

[0026] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A transformer tank, characterized in that include: The oil tank body (1) is used to contain cooling oil and carry the internal components of the transformer; Multiple fin mechanisms (2) are equidistantly arranged on both sides of the outside of the oil tank body (1). Each fin mechanism (2) includes heat dissipation fins (201) forming a cavity (202) inside. The cavity (202) is interconnected with the inside of the oil tank body (1), and the cooling oil can circulate therein to dissipate heat. Two sets of circulating stirring mechanisms (3) are located on both sides of the bottom of the oil tank body (1) to promote the circulation of cooling oil between the oil tank body (1) and the heat dissipation fins (201); The first drive mechanism (4) is connected to the circulating stirring mechanism (3) and is used to drive the circulating stirring mechanism (3) to operate; The adjustment assembly includes an adjustment plate (203) disposed in the cavity (202) of the heat dissipation fins (201), and a second drive mechanism (5) for driving the adjustment plate (203) to slide in the cavity (202). The sliding of the adjustment plate (203) can change the effective oil storage volume of the cavity (202) of the heat dissipation fins (201), thereby adjusting the contact area between the cooling oil and the heat dissipation fins (201) to adjust the heat dissipation effect. The air supply component is connected to the inside of the heat dissipation fins (201) and can balance the pressure inside the heat dissipation fins (201) caused by volume change when the adjustment plate (203) slides. The second drive mechanism (5) includes a second motor (501), a second worm gear assembly (502) and a winding shaft (503). The adjustment assembly also includes a first rope (205) and a second rope (206) and a pull plate (204) fixed on both sides of the adjustment plate (203). The first rope (205) and the second rope (206) are respectively connected to the pull plates (204) on both sides of the adjusting plate (203). The winding shaft (503) is movably connected inside the oil tank body (1) and rotates in both directions under the transmission action of the second motor (501) and the second worm gear assembly (502) to realize the winding or unwinding of the first rope (205) and the second rope (206), thereby driving the adjusting plate (203) to slide back and forth in the cavity (202) of the heat dissipation fins (201) to accurately change the effective oil storage volume of the cavity (202) of the heat dissipation fins (201). The adjustment assembly also includes a limiting roller (6), a take-up roller (7), and a support shaft (8). Multiple sets of limiting rollers (6) are set outside the support shaft (8) to guide the first rope (205) and the second rope (206). The support shaft (8) is located inside the oil tank body (1) and is rotatably connected to the oil tank body (1). The take-up roller (7) rotates under the drive of the take-up shaft (503) to enhance the stability of the first rope (205) and the second rope (206) during the winding and unwinding process, and to avoid tilting or jamming when the adjustment plate (203) slides.

2. The transformer oil tank according to claim 1, characterized in that: The circulating stirring mechanism (3) includes a stirring cylinder (301), and multiple sets of first blades (302) and multiple sets of second blades (303) disposed outside the stirring cylinder (301). The first driving mechanism (4) includes a first motor (401), a first worm gear assembly (402), and a rotating shaft (403). The rotating shaft (403) drives the stirring drum (301) to rotate under the transmission of the first motor (401) and the first worm gear assembly (402). The rotation of the first blade (302) can drive the cooling oil on both sides of the bottom of the oil tank body (1) to converge towards the center. The second blade (303) can extend into the cavity (202) inside the heat dissipation fins (201) to discharge the cooling oil in the heat dissipation fins (201) and guide it to the inside of the oil tank body (1), thereby enhancing the circulation efficiency of the cooling oil.

3. The transformer oil tank according to claim 1, characterized in that: The air replenishment assembly includes an air replenishment tube (10), an external tube (207), a connecting tube (12), a central tube (11), an extension tube (13), and a breathing valve (15). The air supply pipe (10) connects the inside of the heat dissipation fins (201) to the external pipe (207). The connecting pipe (12) connects the external pipe (207) to the central pipe (11). The extension pipe (13) connects the central pipe (11) to the breather valve (15). When the adjustment plate (203) slides, causing the pressure inside the cavity (202) of the heat dissipation fins (201) to change, the breather valve (15) replenishes gas into the cavity (202) to maintain pressure balance.

4. The transformer oil tank according to claim 3, characterized in that: The external tube (207) is fixed on the outside of the heat dissipation fins (201), and the second rope (206) is located inside the external tube (207), and the two ends of the second rope (206) pass through the two ends of the external tube (207) and extend to the heat dissipation fins (201) and the oil tank body (1), respectively. The external tube (207) has a cavity (208) inside for accommodating the second rope (206), and the diameter of the cavity (208) is larger than the diameter of the second rope (206) for gas flow.

5. The transformer oil tank according to claim 3, characterized in that: The gas replenishment assembly also includes an oil storage tank (16) and an air inlet pipe (14). The air inlet pipe (14) connects the breather valve (15) and the oil storage tank (16). The breather valve (15) is equipped with a drying and filtering assembly, which is used to dry and filter the gas replenished to the cavity (202) of the heat dissipation fins (201) and the oil storage tank (16) to prevent moisture and impurities from affecting the insulation performance of the cooling oil and the normal operation of the regulating assembly. The oil storage tank (16) is connected to the inside of the oil tank body (1) through a pipe, and a solenoid valve (17) is provided on the pipe. The opening and closing of the solenoid valve (17) can accurately control the flow of cooling oil between the oil storage tank (16) and the oil tank body (1), realize the on-demand replenishment of cooling oil, and ensure the stability of the cooling oil level in the oil tank body (1).

6. The transformer oil tank according to claim 1, characterized in that: The heat dissipation fins (201) are evenly and equidistantly distributed on both sides of the oil tank body (1). The adjustment plate (203) is adapted to the inner wall of the cavity (202) of the heat dissipation fins (201), and the edge of the adjustment plate (203) is provided with a sealing structure. While ensuring the smooth sliding of the adjustment plate (203), the leakage of cooling oil is reduced, and the accuracy of heat dissipation area adjustment is ensured.

7. The transformer oil tank according to claim 1, characterized in that: The heat dissipation fins (201) adopt a rectangular thin plate structure and are formed by precision bending process. The joints are fully welded to ensure the sealing performance of the cavity (202) and prevent the leakage of cooling oil from affecting the heat dissipation efficiency and the safety of equipment operation.

8. The transformer oil tank according to claim 1, characterized in that: The oil tank body (1) has guide plates (9) fixed on both sides inside. The guide plates (9) are evenly provided with guide holes that are adapted to multiple sets of first ropes (205). Each group of first ropes (205) is connected to the adjustment plate (203) after passing through the corresponding guide hole. This can form a precise constraint on the traction direction of the first rope (205), preventing it from getting tangled or interfering with the internal components of the tank body (1) due to deviation during the winding and unwinding process, and ensuring the stability of the sliding adjustment of the adjustment plate (203).

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