Transformer oil tank

Abstract

The invention discloses a transformer oil tank, and relates to the technical field of power transformers, the transformer oil tank comprises an oil tank body and a plurality of groups of fin mechanisms, and each group of fin mechanism comprises radiating fins with cavities formed inside. The cooling fins with the cavities are arranged on the outer side of the oil tank body, the slidable adjusting plate and the driving assembly are matched, the effective oil storage volume of the cooling fins can be flexibly adjusted according to the environment temperature, the maximum cooling area is guaranteed in the non-low-temperature environment so that efficient cooling can be achieved, the cooling contact area is reduced in the low-temperature environment, and the service life of the oil tank is prolonged. Wax precipitation and viscosity increase caused by excessive cooling of the cooling oil are avoided, so that the insulating property and the circulating fluidity of the cooling oil are maintained, the circulating stirring mechanism can promote efficient circulation of the cooling oil between the oil tank and the fins under driving of the driving mechanism, and the heat dissipation efficiency is further improved; the problems of heat dissipation and insulation performance of the oil-immersed transformer in a low-temperature environment are effectively solved, and the operation reliability and environmental adaptability of equipment are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power transformers, in particular to a transformer oil tank. BACKGROUND

[0002] In the power transmission and distribution system, the oil-immersed transformer as the core equipment, its operation stability and heat dissipation efficiency are directly related to the safe and reliable operation of the power system. In the prior art, the outer side of the oil tank of the oil-immersed transformer is usually provided with a plurality of groups of heat dissipation fins. The space formed inside the fin structure is in communication 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 the natural convection or forced circulation of the cooling oil between the oil tank and the fin, the heat generated by the transformer core and winding is transferred to the external environment. Specifically, the high-temperature cooling oil after absorbing heat flows into the inside of the fin, and the heat is dissipated by the large-area contact of the fin with the air. The cooling oil after cooling flows back to the oil tank, thereby continuously maintaining the normal working temperature of the transformer. However, when such oil-immersed transformers are applied in low-temperature areas, such as severe cold regions or extremely low-temperature environments in winter, the low-temperature environment will cause adverse changes in the physical properties of the cooling oil. For example, the low-temperature condition will cause the wax and other solid substances dissolved in the cooling oil to precipitate. These precipitates not only adhere to the inner wall of the fin and the surface of the insulating components inside the oil tank, causing partial blockage of the heat dissipation channel and further hindering the circulation of the oil flow, but also directly damage the insulation performance of the cooling oil. The presence of solid precipitates may cause the breakdown field strength of the oil to decrease, the partial discharge to intensify, and other problems. 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 cost and fault risk of the power system. Therefore, in view of the problem of deterioration of heat dissipation efficiency and insulation performance of the oil-immersed transformer due to wax precipitation and viscosity increase of the cooling oil in low-temperature environments, there is a lack of effective solutions in the prior art, and there is an urgent need for a heat dissipation structure optimization scheme that can adapt to low-temperature working conditions and ensure the stability of the performance of the cooling oil. SUMMARY

[0003] Based on this, the purpose of the present application is to provide a transformer oil tank to solve the technical problems raised in the background.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a transformer oil tank, comprising: an oil tank body for containing cooling oil and carrying internal components of the transformer; a plurality of groups of fin mechanisms equidistantly arranged on both sides of the outside of the oil tank body, each group of fin mechanisms comprising heat dissipation fins forming a cavity inside, the cavity being in communication with the inside of the oil tank body, and the cooling oil being capable of circulating and flowing therebetween to realize heat dissipation; 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 can supply gas to the cavity through this component to maintain pressure balance. The outer pipe is fixed outside the heat dissipation fin, and the second rope is located inside the outer pipe and extends through both ends of the outer pipe to the heat dissipation fin and the inside of the oil tank body; The outer pipe is internally provided with a pipeline cavity for accommodating the second rope, and the diameter of the pipeline cavity is larger than the diameter of the second rope, for the purpose of gas circulation; The air supplement assembly further comprises an oil storage tank and an air inlet pipe, the air inlet pipe is communicated with the breather valve and the oil storage tank, and the breather valve is internally provided with a drying and filtering assembly, which is used for drying and filtering the gas supplemented into the cavity of the heat dissipation fin and the oil storage tank, so as to prevent moisture and impurities from affecting the insulation performance of the cooling oil and the normal operation of the adjusting assembly; The oil storage tank is communicated with the inside of the oil tank body through a pipeline, and an electromagnetic valve is arranged on the pipeline, so that the circulation of the cooling oil between the oil storage tank and the oil tank body can be accurately controlled by opening and closing the electromagnetic valve, the cooling oil can be supplemented on demand, and the stability of the cooling oil level in the oil tank body is ensured; The adjusting assembly further comprises a limiting roller, a winding roller shaft and a support shaft, a plurality of limiting rollers are arranged outside the support shaft for guiding the first rope and the second rope, and the support shaft is rotatably connected to the inside of the oil tank body, the winding roller shaft rotates under the driving of the winding shaft, thereby enhancing the stability of the winding and unwinding process of the rope and avoiding the inclination or jamming phenomenon of the adjusting plate during sliding; The inside of the oil tank body is fixed with guide plates on both sides, and the guide plates are uniformly provided with guide holes matched with the plurality of first ropes; Each group of first ropes is connected with the adjusting plate after penetrating through the corresponding guide holes, so that the pulling direction of the first rope can be accurately constrained, the winding or interference with the internal components of the oil tank body due to deviation during the winding and unwinding process is avoided, and the stability of the sliding adjustment of the adjusting plate is ensured.

[0005] In summary, the present application has the following advantages: by arranging the heat dissipation fin with a cavity outside the oil tank body, and cooperating with the slidable adjusting plate and the driving assembly, the effective oil storage volume of the heat dissipation fin can be flexibly adjusted according to the environmental temperature, the maximum heat dissipation area is ensured for efficient heat dissipation in non-low temperature environment, and the heat dissipation contact area is reduced in low temperature environment, so as to prevent the wax from being precipitated and the viscosity from being increased due to excessive cooling of the cooling oil, thereby maintaining the insulation performance and circulating flowability of the cooling oil; the circulating stirring mechanism driven by the driving mechanism can promote the efficient circulation of the cooling oil between the oil tank and the fin, thereby 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

[0006] 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.

[0007] 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

[0008] 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.

[0009] The embodiments of the present invention will now be described.

[0010] Example A transformer oil tank, such as Figures 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.

[0011] 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.

[0012] 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.

[0013] Circulation stirring mechanism 3: located at the bottom of the oil tank body 1 on both sides, including stirring barrel 301 and a plurality of first blade 302 and a plurality of second blade 303 set outside the stirring barrel 301, for promoting the circulation of cooling oil between the oil tank body 1 and the heat dissipation fin 201; the first driving mechanism 4 is connected with the circulation stirring mechanism 3, which is composed of the first motor 401, the first worm gear assembly 402 and the rotating shaft 403, the rotating shaft 403 drives the stirring barrel 301 to rotate under the action of transmission.

[0014] Air supplement assembly: including air supplement pipe 10, external pipe 207, connecting pipe 12, center pipe 11, extension pipe 13, breathing valve 15, oil storage tank 16 and air inlet pipe 14; air supplement pipe 10 communicates the inside of heat dissipation fin 201 with external pipe 207, connecting pipe 12 communicates external pipe 207 with center pipe 11, extension pipe 13 connects center pipe 11 with breathing valve 15, air inlet pipe 14 communicates breathing valve 15 with oil storage tank 16; The external pipe 207 is fixed outside the heat dissipation fin 201, and the pipe cavity 208 is opened inside, the second rope 206 is located in the pipe cavity 208 and the two ends extend to the inside of the heat dissipation fin 201 and the oil tank body 1 respectively, the diameter of the pipe cavity 208 is greater than the diameter of the second rope 206 for gas flow; the breathing valve 15 is built-in dry filter assembly, the oil storage tank 16 is communicated with the inside of the oil tank body 1 through the pipe, and the electromagnetic valve 17 is arranged on the pipe.

[0015] Working process Non-cryogenic environment running state When the oil tank body 1 is in non-cryogenic environment, the adjusting plate 203 is located at the inner limit position of the heat dissipation fin 201, at this time the cavity 202 inside the heat dissipation fin 201 is in the maximum oil storage state, the cooling oil fully fills the cavity 202 and forms the maximum contact area with the inner wall of the heat dissipation fin 201.

[0016] At the same time, the first driving mechanism 4 starts to operate, 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 at one side of the bottom of the oil tank body 1; when the stirring barrel 301 rotates, it synchronously drives the multiple sets of first blades 302 and the multiple sets of second blades 303 outside to rotate coordinately: the rotation of the first blades 302 forms a guiding driving force for the cooling oil at the bottom of the oil tank body 1, so as to make the cooling oil converge from both sides to the middle area; the multiple sets of second blades 303 extend into the cavities 202 inside the corresponding heat dissipation fins 201, and the rotating action helps to discharge the cooling oil in the cavities 202 and guide it to the inside of the oil tank body 1; in cooperation therewith, the high-temperature cooling oil that has absorbed heat from the top of the oil tank body 1 flows into the cavities 202 from the upper inlet of the heat dissipation fins 201, thereby forming a complete cooling circulation loop, quickly taking away the heat in the oil tank body 1 through efficient heat exchange, and ensuring the heat dissipation efficiency of the transformer under normal load or high-temperature working conditions.

[0017] Running state in low-temperature environment When the oil tank body 1 is in a low-temperature environment, after being monitored by the temperature sensor, the second driving mechanism 5 starts to operate, and 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 the multiple sets of winding roller shafts 7 to rotate.

[0018] At this time, the multiple sets of winding shafts 503 rotate in the forward direction, one end winds the first rope 205, and the other end simultaneously unwinds 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 inside of the cavity 202 of the heat dissipation fin 201 towards the oil tank body 1, so that the effective oil storage volume of the cavity 202 decreases, the contact area of the cooling oil with the heat dissipation fin 201 correspondingly decreases, thereby reducing the overall heat dissipation efficiency, avoiding the temperature of the cooling oil from dropping sharply due to excessive heat dissipation, preventing the precipitation and viscosity increase of waxy solid substances, and maintaining the physical stability and insulation performance of the cooling oil.

[0019] In this process, when the adjusting plate 203 is displaced and adjusted in the cavity 202, the space inside each set of heat dissipation fins 201 on one side of the adjusting plate 203 is kept in communication with the external pipes 207 through the air supplementing pipe 10, the multiple sets of external pipes 207 form a through structure with the center pipe 11 through the connecting pipe 12, and the center pipe 11 is connected with the breather valve 15 through the extension pipe 13; when the adjusting plate 203 slides and causes the pressure in the cavity 202 to change, the breather valve 15 supplements gas to the space on this side through the air supplementing channel composed of the air supplementing pipe 10, the external pipes 207, the connecting pipe 12, the center pipe 11 and the extension pipe 13, so as to balance the pressure inside the heat dissipation fin 201 in real time, and avoid the jamming of the adjusting plate 203 or the damage of the sealing structure of the cavity 202 caused by abnormal local pressure.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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 barrel 301, the plurality of first vanes 302 and the plurality of second vanes 303 arranged on the outer side of the stirring barrel 301 are driven to rotate synchronously. The rotation of the first vanes 302 can form a guiding driving force for the cooling oil at the bottom of the oil tank body 1, so as to make the cooling oil converge from both sides to the middle region. At the same time, the plurality of second vanes 303 extend into the cavities 202 in the heat dissipation fins 201. By the rotation of the second vanes 303, the cooling oil in the cavities 202 of the heat dissipation fins 201 can be effectively discharged and guided to the inside of the oil tank body 1. In cooperation therewith, the high-temperature cooling oil that has absorbed heat in the upper part of the oil tank body 1 flows into the cavities 202 from the upper inlet of the heat dissipation fins 201, so as to form a complete and efficient cooling circulation loop. When the oil tank body 1 is in a low-temperature environment, the second driving mechanism 5 is started to operate under the monitoring of the temperature sensor. The second motor 501, the second worm and gear assembly 502, and the winding shaft 503 are sequentially driven, and the winding shaft 503 transmits the driving force to the plurality of winding rollers 7 to make them rotate. At this time, the plurality of winding shafts 503 rotate in the forward direction. One end of the winding shaft 503 winds the first rope 205. By the traction of the first rope 205, the adjusting plate 203 slides along the inside of the cavity 202 of the heat dissipation fin 201 and moves to the direction close to the oil tank body 1. This process reduces the effective oil storage volume of the cavity 202, and the contact area of the cooling oil with the heat dissipation fin 201 is correspondingly reduced, thereby reducing the overall heat dissipation efficiency. This adjusting mechanism can effectively inhibit the excessive heat dissipation of the cooling oil in a low-temperature environment. When the environmental temperature is too low, the cooling oil is easy to precipitate wax solid substances due to sudden temperature drop and increase in viscosity. By reducing the heat dissipation contact area, the cooling oil can be maintained in a relatively stable temperature range to avoid deterioration of its physical properties and affect the insulation effect and circulation flowability. At the same time, when the adjusting plate 203 moves to the direction close to the oil tank body 1 to reduce the volume of the cavity 202, the other end of the winding shaft 503 simultaneously unwinds the second rope 206. Since the other end of the second rope 206 is fixedly connected to the other side of the adjusting plate 203, the coordinated winding and unwinding actions can provide stable bidirectional traction for the adjusting plate 203, effectively avoid the inclination, jamming, or mechanical interference with the inner wall of the cavity 202 during the sliding process of the adjusting plate 203, and ensure the smoothness and accuracy of the adjusting process. Specifically, the proximal ends of the first rope 205 and the second rope 206 are respectively fixed on the two side end faces of the adjusting plate 203, forming a symmetrical traction structure. When the winding shaft 503 rotates forward, the first rope 205 is wound and the second rope 206 is simultaneously unwound, driving the adjusting plate 203 to displace towards the oil tank body 1, and when the winding shaft 503 reversely rotates, the second rope 206 is wound and the first rope 205 is simultaneously unwound, driving the adjusting plate 203 to reset away from the oil tank body 1; Through the alternating control of the winding shaft 503, the reciprocating displacement adjustment of the adjusting plate 203 in the cavity 202 can be realized, so that the effective oil storage volume of the heat dissipation fins 201 can be flexibly changed, and the heat dissipation demand under different environmental temperatures can be accurately adapted. Especially in a low-temperature environment, the contact area can be reduced to reduce the heat dissipation of the cooling oil, and problems such as wax precipitation and abnormal viscosity increase caused by too low temperature can be avoided, so as to ensure the insulation performance and circulating flowability of the cooling oil; Further, when the adjusting plate 203 is displaced in the cavity 202 of the heat dissipation fins 201, the space inside each group of heat dissipation fins 201 on the side of the adjusting plate 203 is in communication with the external pipe 207 through the air supplement pipe 10, and the external pipes 207 are in through structure with the center pipe 11 through the connecting pipe 12, and one end of the center pipe 11 is connected with the breathing valve 15 through the extension pipe 13; The design of this gas circulation path plays an important role. When the adjusting plate 203 moves towards or away from the oil tank body 1, the space on the side of the adjusting plate 203 away from the oil tank body 1 will change in volume and cause a change in pressure. At this time, the breathing valve 15 can supplement gas to the space through the air supplement channel composed of the air supplement pipe 10, the external pipe 207, the connecting pipe 12, the center pipe 11 and the extension pipe 13, so as to balance the pressure inside the heat dissipation fins 201 in real time, and avoid causing the adjusting plate 203 to jam or the sealing structure of the cavity 202 to be damaged due to abnormal local pressure; At the same time, the breathing valve 15 is also connected with the oil storage tank 16 through the air inlet pipe 14, which enables the breathing valve 15 to simultaneously undertake the function of supplementing gas to the upper space inside the oil storage tank 16. More importantly, the breathing valve 15 is internally provided with a drying and filtering assembly, such as silica gel desiccant and precision filter screen, which can deeply process the entering gas, so as to ensure that the gas supplemented into the heat dissipation fins 201 and the oil storage tank 16 is dry and free of impurities. This not only prevents moisture from mixing into the cooling oil to cause the insulation performance to decrease, but also avoids impurities from entering the adjusting mechanism to cause jamming, so as to further improve the operation reliability of the entire cooling system while ensuring pressure balance.

[0024] Although the embodiments of the present application have been shown and described, the specific embodiments are merely exemplary and are not to be construed as limiting the present application, and the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner, and those skilled in the art can make modifications, replacements and variations to the embodiments without creative contribution after reading the specification, and as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A transformer oil 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 changes when the adjustment plate (203) slides.

2. The transformer oil tank according to claim 1, characterized in that: 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).

3. 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.

4. 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 interior 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), and 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) can replenish gas into the cavity (202) through this component to maintain pressure balance.

5. The transformer oil tank according to claim 4, 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.

6. The transformer oil tank according to claim 4, 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).

7. The transformer oil tank according to claim 2, characterized in that: 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 it. The take-up roller (7) rotates under the drive of the take-up shaft (503), which enhances the stability of the rope winding and unwinding process and avoids tilting or jamming when the adjustment plate (203) slides.

8. 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.

9. 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.

10. 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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