Assembly type oil tank and oil-immersed transformer

Abstract

The invention belongs to the technical field of oil-immersed transformers, and particularly relates to an assembly type oil tank which comprises a transformer tank body composed of a main tank body, oil tank side plates, an oil tank top frame and an oil tank top plate. The heat dissipation mechanism comprises a heat dissipation frame installed on the oil tank side plate and a ventilation seat installed on the installation transverse frame, a heat dissipation fan is arranged in the ventilation seat, heat dissipation fins and a heat conduction seat are arranged in the heat dissipation frame, and the ventilation seat is connected with the heat dissipation frame through an air guide cover and a corrugated pipe; the problems needing to be solved in the invention are fatigue damage and insufficient heat dissipation efficiency caused by vibration: when the oil tank is used, a heat dissipation frame is mounted on a main tank body by a side plate of the oil tank, a ventilation seat and an air guide cover are mounted on a mounting cross frame, a corrugated pipe is connected with the heat dissipation frame, and vibration transmitted to a transformer tank body is reduced by matching with a vibration reduction mechanism.

Description

Technical Field

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

[0002] As a key device in the power system, oil-immersed transformers are widely used in voltage step-up and step-down conversions. Its core components include iron cores, coils, insulating materials, fuel tanks, etc. Among them, the fuel tank not only serves as a container for insulating oil but also plays an important role in heat dissipation. Conventional oil-immersed transformer fuel tanks usually adopt welded steel structures and achieve internal pressure balance through oil conservators to avoid excessive pressure caused by temperature rise. However, the following significant defects exist in the prior art: 1. Fatigue damage caused by vibration: Conventional radiators are usually directly installed on the fuel tank body. The vibration generated during the operation of the radiator will be directly transmitted to the fuel tank connection, and long-term action is likely to cause fatigue damage to the connection parts, reducing the safety and service life of the equipment; 2. Insufficient heat dissipation efficiency: Conventional radiators lack effective auxiliary heat dissipation structures and rely only on natural convection or simple forced air cooling, resulting in limited heat dissipation effects. Especially under high-temperature or high-load conditions, it is prone to problems of insufficient heat dissipation, affecting the stable operation of the transformer; In addition, existing radiators are prone to adsorbing oil stains and dust during long-term use, further reducing the heat dissipation efficiency. The traditional design does not fully consider natural cleaning methods such as rain washing, resulting in increased maintenance costs; Therefore, it is necessary to design an assembled fuel tank and an oil-immersed transformer to solve the above problems. Summary of the Invention

[0003] The purpose of the present invention is to provide an assembled fuel tank and an oil-immersed transformer to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solutions: An assembled fuel tank, comprising: a transformer box body, which is composed of a main box body, fuel tank side plates, a fuel tank top frame, and a fuel tank top plate; A heat dissipation mechanism, including a heat dissipation frame installed on the fuel tank side plate, a ventilation seat installed on the installation cross frame, a heat dissipation fan is arranged in the ventilation seat, heat dissipation fins and a heat conduction seat are arranged in the heat dissipation frame, and the ventilation seat is connected to the heat dissipation frame through an air guide cover and a corrugated pipe; Fuel tank support plates and buffer oil boxes are arranged on the surface of the fuel tank side plates, and the buffer oil boxes are connected to the main box body through connecting pipes; A vibration damping mechanism, including a buffer main seat and a vibration damping seat, a hydraulic damper and a buffer spring are arranged in the buffer main seat, vibration damping sliding plates and vibration damping springs are arranged on both sides of the vibration damping seat, and the vibration damping sliding plates cooperate with the vibration damping chutes in the buffer main seat.

[0005] Preferably, heat dissipation vertical stripes are provided on the surface of the heat sink, arranged at equal intervals and attached to the connecting pipe.

[0006] Preferably, guide plates and baffle plates arranged in a staggered manner are provided inside the air guide cover, corresponding to the position of the heat dissipation fan.

[0007] Preferably, the damping chute is of an inclined structure and cooperates with the damping slide plate; A filter screen is provided at the lower end of the ventilation base.

[0008] Preferably, a friction damping plate and a damping spring are provided inside the installation cross frame; Auxiliary slide plates and damping slide plates are provided at both ends of the buffer main seat, and the damping slide plates are slidably matched with the friction damping plate.

[0009] An oil-immersed transformer includes an assembled oil tank; An inner frame body and an iron core coil are provided inside the main box body, and a clamping plate is provided at the upper end of the iron core coil; The side plate of the oil tank is clamped and fixed to the main box body through an installation clamping plate and an installation clamping groove.

[0010] Preferably, a lifting hook is provided at the upper end of the main box body, located between the top frame of the oil tank and the side plate of the oil tank.

[0011] Preferably, support columns are provided on the outer side of the clamping plate; Positioning clamping grooves are provided on the outer side of the inner frame body and cooperate with the positioning convex strips on the side plate of the oil tank.

[0012] Preferably, a support bottom plate and a buffer pad are provided at the bottom of the main box body to support the inner frame body; The top plate of the oil tank presses against the clamping plate.

[0013] Preferably, iron core lead-out sleeves, low-voltage sleeves and high-voltage sleeves are provided on the top plate of the oil tank.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. Through the designed transformer box body, the side plate of the oil tank installs the heat dissipation frame on the main box body, the ventilation base and the air guide cover are installed on the installation cross frame, connected to the heat dissipation frame through a corrugated pipe, and cooperate with the damping mechanism to reduce the vibration transmitted to the transformer box body, and the buffer oil box is installed inside the heat dissipation frame and communicated with the inside of the main box body through a connecting pipe. When the oil liquid inside the transformer box body heats up and the volume increases, it enters the oil tank support plate, and is sucked back into the transformer box body when it falls back. Moreover, when the heat dissipation fan in the ventilation base operates for heat dissipation, the air flow flows through the surface of the oil tank support plate to assist in heat dissipation, making the heat dissipation effect better.

[0015] 2. Through the designed heat dissipation mechanism, the fuel tank support plate at one end of the heat sink passes through the fuel tank side plate and contacts the oil in the main tank, so that it can fully contact the oil to export and dissipate heat, and the heat dissipation effect is better during heat dissipation. After long-term use, too much oil and dust are adsorbed on the heat sink, which can be naturally washed during rain, and the guide plate and the baffle are used to reduce the rain from hitting the heat dissipation fan.

[0016] 3. Through the designed vibration damping mechanism, during use, the buffer main seat and the vibration damping seat are supported by the hydraulic damper and the buffer spring. The transformer box is installed on the buffer main seat and used in cooperation with the vibration damping seat and the installation cross frame to support and install at the use position. The vibration generated during use is buffered and damped by the buffer spring and the hydraulic damper. At the same time, when the vibration damping slide plate slides due to vibration, it moves in the inclined vibration damping chute, and the friction damping is carried out through the vibration, and at the same time, the vibration damping spring is used to support and strengthen the friction damping effect. And in cooperation with the auxiliary slide plate, when vibrating, it drives the damping slide plate at one end to slide in the friction damping plate and press on the damping spring, and the buffer and vibration damping effect is better. Brief Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic internal structural diagram of the present invention; Figure 3 is a schematic heat dissipation structural diagram of the present invention; Figure 4 is a schematic structural diagram of the fuel tank side plate of the present invention; Figure 5 is a schematic structural diagram of the heat dissipation fan installation of the present invention; Figure 6 is a schematic structural diagram of the buffer main seat of the present invention; Figure 7 is a schematic vibration damping structure diagram of the present invention; Figure 8 is a schematic ventilation damping structure diagram of the present invention; Figure 9 is a schematic structural diagram of the installation cross frame of the present invention; In the figure: 1. Transformer box body; 11. Main box body; 12. Oil tank side plate; 121. Installation clamping plate; 122. Installation clamping groove; 13. Oil tank top frame; 14. Oil tank top plate; 15. Lifting hook; 16. Installation cross frame; 17. Inner frame body; 171. Positioning rib; 172. Positioning clamping groove; 173. Support bottom plate; 174. Buffer pad; 18. Clamping plate; 19. Iron core coil; 191. Support column; 2. Heat dissipation mechanism; 21. Heat dissipation frame; 22. Ventilation base; 23. Air guide cover; 231. Bellows; 232. Guide plate; 233. Partition plate; 24. Heat sink; 241. Heat conduction base; 242. Heat dissipation vertical stripes; 25. Oil tank support plate; 26. Connecting pipe; 27. Buffer oil box; 28. Filter screen; 29. Heat dissipation fan; 3. Vibration damping mechanism; 31. Buffer main seat; 311. Vibration damping sliding groove; 312. Vibration damping sliding plate; 313. Vibration damping spring; 32. Vibration damping seat; 33. Auxiliary sliding plate; 34. Buffer spring; 35. Hydraulic damper; 36. Friction damping plate; 37. Damping sliding plate; 38. Damping spring. Specific implementation mode

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Embodiment 1: Please refer to Figures 1 to 9 , the present invention provides a technical solution: an assembled oil tank, including a transformer box body 1, the transformer box body 1 includes a main box body 11, an oil tank side plate 12 is arranged on one side of the main box body 11, a heat dissipation mechanism 2 is arranged on one side of the oil tank side plate 12, the lower end of the main box body 11 is installed with an installation cross frame 16 through a vibration damping mechanism 3, an oil tank top frame 13 is arranged on the upper end of the main box body 11, and an oil tank top plate 14 is arranged on the upper side of the oil tank top frame 13; The heat dissipation mechanism 2 includes a heat dissipation rack 21 installed on the side plate 12 of the fuel tank and a ventilation seat 22 installed on the installation cross-rack 16. A heat dissipation fan 29 is arranged inside the ventilation seat 22, and heat dissipation fins 24 are arranged inside the heat dissipation rack 21. A heat conduction seat 241 is arranged on one side of the heat dissipation fins 24. The oil in the transformer box body 1 expands in volume due to temperature rise and is discharged from the connecting pipe 26 into the buffer oil box 27. The heat dissipation fins 24 and the heat conduction seat 241 quickly absorb heat and dissipate it outward. A gas guide cover 23 is arranged on the upper side of the ventilation seat 22, and a corrugated pipe 231 is arranged on the upper side of the gas guide cover 23. The upper end of the corrugated pipe 231 is connected to the lower end of the heat dissipation rack 21. The heat dissipation fan 29 operates to blow air onto the heat dissipation fins 24 and the buffer oil box 27 to accelerate heat dissipation. The connection through the corrugated pipe 231 reduces the vibration transmitted from the operation of the heat dissipation fan 29 to the side plate 12 of the fuel tank; a fuel tank support plate 25 is arranged on the surface of the side plate 12 of the fuel tank, and a buffer oil box 27 is arranged on one side of the fuel tank support plate 25. The buffer oil box 27 is located between the connecting pipe 26 and the heat dissipation fins 24. The connecting pipe 26 is installed inside the heat conduction seat 241, and the lower end of the connecting pipe 26 is communicated with the inner bottom of the buffer oil box 27. The upper end of the connecting pipe 26 passes through the side plate 12 of the fuel tank and is communicated with the inside of the main box body 11; heat dissipation vertical lines 242 with a depth of 2-5 mm and a spacing of 10-20 mm are arranged on the surface of the heat dissipation fins 24 to increase the heat dissipation surface area. The heat dissipation fins 24 are equidistantly installed inside the heat dissipation rack 21, and one side of the heat dissipation fins 24 is attached to the surface of the connecting pipe 26; a guide plate 232 and a partition plate 233 are arranged inside the gas guide cover 23. The position of the partition plate 233 corresponds to the position of the heat dissipation fan 29. A channel is formed between the partition plate 233 and the gas guide cover 23, and the channel is staggered with the position of the heat dissipation fan 29. The guide plate 232 is inclined and corresponds to the position of the channel. When there is rainwater during daily use, when the rainwater flows down from the heat dissipation fins 24, it can wash away dust and the like to a certain extent, and the phenomenon of flowing towards the heat dissipation fan 29 is reduced through the guiding of the guide plate 232 and the partition plate 233.

[0020] During use, the side plate 12 of the fuel tank installs the heat dissipation rack 21 on the main box body 11, the ventilation seat 22 and the gas guide cover 23 are installed on the installation cross-rack 16, and are connected to the heat dissipation rack 21 through the corrugated pipe 231, and cooperate with the vibration reduction of the vibration reduction mechanism 3 to reduce the vibration transmitted to the transformer box body 1. Moreover, the buffer oil box 27 is installed inside the heat dissipation rack 21 and is communicated with the inside of the main box body 11 through the connecting pipe 26. When the oil in the transformer box body 1 heats up and its volume increases, it enters the fuel tank support plate 25 and is sucked back into the transformer box body 1 when it falls back. Moreover, when the heat dissipation fan 29 in the ventilation seat 22 operates to dissipate heat, the air flow flows through the surface of the fuel tank support plate 25 to assist in heat dissipation, making the heat dissipation effect better.

[0021] As can be seen from the above description, the present invention has the following beneficial effects: For the heat dissipation mechanism 2 adopting the above technical solution, the fuel tank support plate 25 at one end of the heat sink 24 passes through the fuel tank side plate 12 to contact the oil in the main box body 11, so that it can fully contact the oil to conduct and dissipate heat, and the heat dissipation effect is better during heat dissipation. After long-term use, too much oil and dust are adsorbed on the heat sink 24, which can be naturally washed during rain, and the guide plate 232 and the partition plate 233 are used to reduce the occurrence of rainwater splashing on the heat dissipation fan 29.

[0022] The vibration damping mechanism 3 includes a buffer main seat 31 installed at the lower end of the main box body 11 and a vibration damping seat 32 installed on the upper side of the installation cross frame 16. A hydraulic damper 35 is arranged in the middle of the inner side of the buffer main seat 31, and buffer springs 34 are arranged at both ends of the inner side of the buffer main seat 31. One end of the hydraulic damper 35 supports on the inner side of the vibration damping seat 32, and one end of the buffer spring 34 supports on one side of the vibration damping seat 32. Buffer and vibration damping are carried out through the buffer spring 34 and the hydraulic damper 35; a vibration damping chute 311 is opened on the inner wall of the buffer main seat 31, and the inclination angle of the vibration damping chute 311 is 30°-45° to enhance the friction damping effect. Vibration damping springs 313 are installed inside both sides of the vibration damping seat 32, and a vibration damping slide plate 312 is fixedly installed at one end of the vibration damping spring 313. The vibration damping slide plate 312 is slidably installed on both sides of the vibration damping seat 32, and one end of the vibration damping slide plate 312 is slidably installed in the vibration damping chute 311. When the buffer main seat 31 and the vibration damping seat 32 slide relative to each other due to vibration, the vibration damping slide plate 312 slides in the vibration damping chute 311 to further damp and reduce vibration; the inner shape of the vibration damping chute 311 is set to be inclined, and one end of the vibration damping slide plate 312 fits with the inclined surface of the vibration damping chute 311, which is convenient for the vibration damping slide plate 312 to frictionally damp and reduce vibration with the vibration damping chute 311. A filter screen 28 is arranged at the lower end of the ventilation seat 22, which is convenient for filtering air flow during use; a friction damping plate 36 is fixedly installed inside the installation cross frame 16, a damping spring 38 is installed inside the friction damping plate 36, auxiliary slide plates 33 are arranged at both ends of the buffer main seat 31, a damping slide plate 37 is arranged on the lower side of the auxiliary slide plate 33, and the damping slide plate 37 is slidably installed inside the friction damping plate 36 and presses on the damping spring 38. During use, the auxiliary slide plates 33 at both ends of the buffer main seat 31 drive the damping slide plate 37 to slide inside the friction damping plate 36 to compress the damping spring 38 during damping, further strengthening the damping and vibration reduction effect.

[0023] During use, the buffer main seat 31 and the shock absorber seat 32 are supported by the hydraulic damper 35 and the buffer spring 34. The transformer box body 1 is installed on the buffer main seat 31 and used in cooperation with the shock absorber seat 32 and the installation cross frame 16 to support and install at the use position. The vibration generated during use is buffered and dampened by the buffer spring 34 and the hydraulic damper 35. At the same time, when the shock absorber slide plate 312 slides due to vibration, it moves in the inclined shock absorber chute 311, and the friction damping is carried out through vibration, and at the same time, it is cooperated with the shock absorber spring 313 to support and strengthen the friction damping effect. And when the auxiliary slide plate 33 vibrates, it drives the damping slide plate 37 at one end to slide in the friction damping plate 36 and press on the damping spring 38, so that the buffer damping effect is better.

[0024] Embodiment 2: Please refer to Figures 1 to 9 As shown, on the basis of Embodiment 1, an inner frame body 17 is installed inside the main box body 11. An iron core coil 19 is arranged on the upper side of the inner frame body 17. A clamping plate 18 is installed at the upper end of the iron core coil 19. The upper end of the main box body 11 is provided with a fuel tank top frame 13 and a fuel tank top plate 14 is installed. Fuel tank side plates 12 are arranged on all four sides of the main box body 11. An installation clamping plate 121 and an installation clamping groove 122 are arranged on one side of the main box body 11 and the fuel tank side plate 12. A sealing gasket is arranged between the installation clamping plate 121 and the installation clamping groove 122. The installation clamping plate 121 and the installation clamping groove 122 are mutually clamped and fixed by bolts. During use, the fuel tank side plate 12 is installed on the main box body 11 through the clamping of the installation clamping plate 121 and the installation clamping groove 122 and fixed by bolts, and the sealing gasket is used to strengthen the sealing at the installation clamping plate 121 and the installation clamping groove 122. A lifting hook 15 is fixedly installed on the outer side of the upper end of the main box body 11. The lifting hook 15 is located between the fuel tank top frame 13 and the fuel tank side plate 12, which is convenient for hoisting and installing the transformer during use. A support column 191 is arranged on the outer side of the clamping plate 18. A positioning clamping groove 172 is formed on the outer side of the inner frame body 17. A positioning convex strip 171 is arranged on one side of the fuel tank side plate 12. The positioning clamping groove 172 is slidably installed on the outer side of the positioning convex strip 171; A support bottom plate 173 is arranged at the inner bottom of the main box body 11. A buffer pad 174 is arranged on the upper side of the support bottom plate 173. The buffer pad 174 supports the lower side of the inner frame body 17. The fuel tank top plate 14 presses on the upper side of the clamping plate 18. The installation is ensured to be more stable through the guidance of the positioning convex strip 171 and the positioning clamping groove 172, and the support is carried out from the bottom through the support bottom plate 173 and the buffer pad 174. A sleeve is arranged on the upper side of the fuel tank top plate 14, and the sleeve includes an iron core lead-out sleeve, a low-voltage sleeve and a high-voltage sleeve.

[0025] Working principle and usage process of the present invention: During assembly, the fuel tank side plate 12 is installed on the main box body 11 through the engagement of the installation card plate 121 and the installation card slot 122 and fixed by bolts. And the installation card plate 121 and the installation card slot 122 are strengthened in sealing through a gasket. Then, after the inner frame body 17, the clamping plate 18 and the iron core coil 19 are assembled, they are installed in the transformer box body 1. The installation is ensured to be more stable through the guidance of the positioning rib 171 and the positioning card slot 172, and supported from the bottom through the support bottom plate 173 and the buffer pad 174. The support column 191 supports the outside of the clamping plate 18, so as to ensure more stable installation and use. The fuel tank top plate 14 is installed on the fuel tank top frame 13 and pressed on the clamping plate 18 to maintain stability. During installation and use, it is supported and fixed at the use position through the installation cross frame 16. During use, the oil liquid in the transformer box body 1 expands in volume due to temperature rise and is discharged into the buffer oil box 27 through the communication pipe 26. The heat dissipation fins 24 and the heat conduction seat 241 quickly absorb heat and dissipate heat outward. At the same time, the heat dissipation fan 29 operates to blow air onto the heat dissipation fins 24 and the buffer oil box 27 to accelerate heat dissipation. After heat dissipation, the temperature drops and the volume decreases, and the oil is sucked back into the transformer box body 1 from the buffer oil box 27 again through negative pressure. During heat dissipation, the heat dissipation fan 29 is located on the installation cross frame 16, and cooperates with the buffer and vibration reduction of the vibration reduction mechanism 3 to reduce the impact of vibration on the transformer box body 1. When there is rainwater during daily use, when the rainwater flows down from the heat dissipation fins 24, it can wash away dust and the like to a certain extent, and the flow to the heat dissipation fan 29 is reduced through the guidance of the guide plate 232 and the partition plate 233. And the vibration generated during the use of the transformer is buffered and vibration-reduced through the buffer spring 34 and the hydraulic damper 35. And when the buffer main seat 31 and the vibration reduction seat 32 slide relative to each other due to vibration, the vibration reduction slide plate 312 slides in the vibration reduction slide groove 311 to further damp and reduce vibration, and the cooperation of the vibration reduction slide plate 312 compressing the vibration reduction spring 313 has a better damping and vibration reduction effect. And the auxiliary slide plates 33 at both ends of the buffer main seat 31 drive the damping slide plate 37 to slide in the friction damping plate 36 to compress the damping spring 38 during damping, further strengthening the damping and vibration reduction effect, so as to further reduce vibration.

[0026] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0027] As described above, it is only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made by those of ordinary skill in the art to the technical solution of the present invention shall be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. An assembled oil tank, characterized in that: include: The transformer box (1) is composed of a main box (11), an oil tank side plate (12), an oil tank top frame (13) and an oil tank top plate (14); The heat dissipation mechanism (2) comprises a heat dissipation frame (21) mounted on the oil tank side plate (12), and a ventilation seat (22) mounted on the mounting cross frame (16); a heat dissipation fan (29) is arranged inside the ventilation seat (22); a heat dissipation fin (24) and a heat conducting seat (241) are arranged inside the heat dissipation frame (21); and the ventilation seat (22) is connected to the heat dissipation frame (21) via an air guide cover (23) and a bellows (231); An oil tank support plate (25) and a buffer oil box (27) are provided on the surface of the oil tank side plate (12); the buffer oil box (27) is connected to the main tank body (11) via a connecting pipe (26); The vibration reduction mechanism (3) comprises a buffer main seat (31) and a vibration reduction seat (32). The buffer main seat (31) is provided with a hydraulic damper (35) and a buffer spring (34). Vibration reduction slide plates (312) and vibration reduction springs (313) are provided on both sides of the vibration reduction seat (32). The vibration reduction slide plates (312) cooperate with vibration reduction slide grooves (311) in the buffer main seat (31).

2. The assembled oil tank according to claim 1, characterized in that: The surface of the heat sink (24) is provided with heat dissipation vertical lines (242), which are arranged at equal intervals and fit closely to the connecting pipe (26).

3. The assembled oil tank according to claim 1, characterized in that: The air guide cover (23) is provided with staggered guide plates (232) and baffle plates (233) corresponding to the positions of the cooling fans (29).

4. The assembled oil tank according to claim 1, characterized in that: The vibration-damping slide groove (311) is an inclined structure and cooperates with the vibration-damping slide plate (312); A filter screen (28) is provided at the lower end of the ventilation seat (22).

5. The assembled oil tank according to claim 1, characterized in that: The mounting cross frame (16) is provided with a friction damping plate (36) and a damping spring (38); An auxiliary slide plate (33) and a damping slide plate (37) are provided at both ends of the buffer main seat (31), and the damping slide plate (37) is slidably matched with the friction damping plate (36).

6. An oil-immersed transformer, characterized in that: An assembled oil tank comprising any one of claims 1 to 5; An inner frame (17) and an iron core coil (19) are arranged inside the main box body (11), and a clamping plate (18) is arranged at the upper end of the iron core coil (19); The oil tank side plate (12) is fixedly connected to the main box body (11) by means of a mounting clamping plate (121) and a mounting clamping groove (122).

7. The oil-immersed transformer according to claim 6, characterized in that: A lifting hook (15) is provided at the upper end of the main tank body (11) and is located between the oil tank top frame (13) and the oil tank side plate (12).

8. The oil-immersed transformer according to claim 6, characterized in that: A support column (191) is provided outside the clamping plate (18); A positioning groove (172) is arranged on the outer side of the inner frame (17) and cooperates with a positioning convex strip (171) on the oil tank side plate (12).

9. The oil-immersed transformer according to claim 6, characterized in that: A supporting bottom plate (173) and a buffer pad (174) are provided at the bottom of the main box body (11) to support the inner frame body (17); The top plate (14) of the oil tank is crimped with a clamping plate (18).

10. The oil-immersed transformer according to claim 6, characterized in that: An iron core lead-out bushing, a low-pressure bushing and a high-pressure bushing are arranged on the oil tank top plate (14).

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