Oil-immersed transformer

Abstract

The invention relates to the field of oil-immersed transformers, and discloses an oil-immersed transformer which comprises a transformer body and two bottom beams, the transformer body is fixedly mounted on the two bottom beams, reflective drying structures are arranged on the bottom beams, and a liquid pumping structure is arranged in the transformer body. Four groups of cooling fins are arranged on the four side surfaces of the transformer main body through folding structures, and the cooling fins can be folded onto the transformer main body through the folding structures when the transformer is transported, so that the occupied space of the transformer is reduced, and the transportation is more convenient; and by arranging the mounting structure and the clamping structure, the cooling fins can be conveniently mounted or dismounted on the transformer main body, so that the foldable cooling fins can be conveniently dismounted from the transformer main body and can be repeatedly used.

Description

Technical Field

[0001] This invention relates to the technical field of oil-immersed transformers, and more particularly to an oil-immersed transformer. Background Technology

[0002] Oil-immersed transformers are a type of transformer widely used in power systems, and their main functions include insulation, cooling, and protection.

[0003] In the prior art, oil-immersed transformers are equipped with a shielding component. When it is necessary to use a shielding cover to shield the heat dissipation fins, the storage component is operated to release the shielding cover, allowing it to unfold downwards and be placed on the outer surface of the heat dissipation fins. This reduces the impact of wind and sand on the heat dissipation fins, improves the heat dissipation performance of the heat dissipation fins, and thus ensures the performance of the transformer.

[0004] Since heat dissipation fins in existing technologies are generally fixedly installed on transformers, disassembly is inconvenient. This results in the heat dissipation fins occupying a large space during the transportation of the transformer, making it inconvenient to transport. Therefore, there are areas for improvement. Summary of the Invention

[0005] To address the problems mentioned in the background section, the present invention provides an oil-immersed transformer.

[0006] The oil-immersed transformer provided by this invention adopts the following technical solution:

[0007] An oil-immersed transformer includes a transformer body and bottom beams. The transformer body is fixedly mounted on two bottom beams. A reflective drying structure is provided on the bottom beams. An oil pumping structure is provided inside the transformer body. Four sets of heat dissipation fins are provided on the four sides of the transformer body through a folding structure.

[0008] The folding structure includes four sets of horizontal bars on the side of the transformer body. The horizontal bars are mounted on the transformer body via an installation structure. Each horizontal bar is connected to multiple first fixing bars at equal intervals. Each first fixing bar has a limiting groove along its length and a rotating groove connecting one end of the limiting groove. A limiting bar is slidably disposed in each limiting groove. Each limiting bar has a guide surface at two corners near the side of the transformer body. The guide surface is inclined. Heat dissipation fins are installed between two vertical limiting bars. A vertical rod is connected to the end of the limiting bar away from the heat dissipation fins. A nut is screwed onto the vertical rod. An insertion bar is disposed on the side of the heat dissipation fins near the transformer body. A slot for inserting the insertion bar is provided on the side of the transformer body.

[0009] Multiple arched plates are evenly spaced on the side of the transformer body, and the arched plates and heat dissipation fins are spaced apart from each other.

[0010] Preferably, the mounting structure includes a mounting plate mounted on a horizontal bar, and the transformer body has a mounting slot for the mounting plate to be movably inserted into the mounting slot, with a locking structure provided between the mounting plate and the mounting slot.

[0011] Preferably, the engaging structure includes an inner groove formed in the mounting plate near both ends, a locking block is provided in the inner groove, and a locking slot is formed on both ends of the mounting groove. One end face of the locking block is inclined, and a connecting strip is connected to the locking block. The connecting strip is set in the inner groove, and one end of the connecting strip is connected to a pressing block. A spring is connected between the connecting strip and the groove wall of the inner groove. Two openings are formed on the groove wall of the inner groove for the locking block and the pressing block to move through respectively. An air-guiding structure is provided above the side of the transformer body.

[0012] Preferably, the reflective drying structure includes a base plate connected between two base beams, an inclined surface is provided on the base plate, and a reflector is installed on the inclined surface of the base plate.

[0013] Preferably, the liquid extraction structure includes multiple L-shaped rods connected to the lower inner wall of the transformer body. One end of each L-shaped rod is provided with an installation sleeve, and a liquid extraction pump is installed in the installation sleeve. The liquid extraction pump outlet is connected to a drain pipe, and the liquid extraction pump inlet is connected to a top pipe. Multiple suction pipes are connected at equal angles around the circumference of the top pipe.

[0014] Preferably, the air-guiding structure includes a fixing block connected to the upper mounting plate. A sleeve is provided on the fixing block by a fastening structure. Two air-guiding plates are fixedly provided on the sleeve. A guide plate is installed on each of the two heat dissipation fins on both sides of each set. One side of the guide plate is inclined towards the middle.

[0015] Preferably, the fastening structure includes a screw block mounted on a fixed block, a rotating cylinder rotatably passing through the sleeve, one end of the rotating cylinder being screwed onto the screw block by a thread, a rotating block being provided at the other end of the rotating cylinder, and a flipping structure being provided between the rotating cylinder and the screw block.

[0016] Preferably, the flipping structure includes a second fixing strip connected to the screw block, one end of the second fixing strip rotatably passing through the rotating shaft, a flipping plate fixedly sleeved on the rotating shaft, an annular groove formed on the flipping plate, a limiting disc movably sleeved in the annular groove, and the limiting disc fixedly mounted on the inner wall of the rotating cylinder.

[0017] In summary, the present invention has the following beneficial technical effects:

[0018] 1. This invention incorporates a folding structure, an installation structure, and a locking structure. The folding structure allows the heat dissipation fins to be folded onto the transformer body during transportation, thereby reducing the space occupied by the transformer and making transportation more convenient. Furthermore, the installation and locking structures facilitate the installation or removal of the heat dissipation fins from the transformer body, allowing for easy removal and reuse of the foldable heat dissipation fins.

[0019] 2. This invention increases the contact area between the transformer body and the outside air by setting an arched plate on the transformer body, thereby improving the heat dissipation efficiency; and a reflective drying structure is set on the bottom beam below the transformer body, which can reflect the outside sunlight to the bottom of the transformer body after rain, automatically drying the moisture accumulated under the transformer body, reducing the possibility of rust caused by dampness at the bottom of the transformer body, and extending the service life of the transformer.

[0020] 3. This invention, by setting up an air-guiding structure, a fastening structure, and a flipping structure, utilizes the air-guiding structure to guide the external airflow to flow between the heat dissipation fins, thereby better removing heat from the heat dissipation fins and further improving the heat dissipation quality. In addition, the fastening structure and the flipping structure allow for the air-guiding structure to be unfastened and flipped onto the folded heat dissipation fins during transportation, thereby reducing the space occupied and facilitating transportation.

[0021] 4. By setting up a liquid extraction structure, the present invention can draw cold oil downwards and hot oil upwards within the transformer body, promoting uniform temperature and reducing localized overheating of components such as the core. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of an oil-immersed transformer according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the internal structure of the transformer body in an embodiment of the present invention;

[0024] Figure 3 This is an embodiment of the present invention. Figure 2 Enlarged view of the structure at point A;

[0025] Figure 4 This is a schematic diagram of the structure of the transformer body after the heat dissipation fins have been removed in an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the heat dissipation fins and folding structure in an embodiment of the present invention;

[0027] Figure 6 This is an embodiment of the present invention. Figure 5Enlarged view of the structure at point B;

[0028] Figure 7 This is an embodiment of the present invention. Figure 5 Enlarged view of the structure at point C;

[0029] Figure 8 This is a schematic diagram of the air intake structure in an embodiment of the present invention;

[0030] Figure 9 This is a schematic diagram of the internal structure of the rotating drum in an embodiment of the present invention;

[0031] Figure 10 This is an embodiment of the present invention. Figure 9 Enlarged view of the structure at point D.

[0032] Explanation of reference numerals in the attached drawings: 1. Transformer body; 2. Bottom beam; 3. Heat dissipation fins; 4. Horizontal bar; 5. First fixing bar; 6. Vertical rod; 7. Nut; 8. Limiting bar; 9. Guide surface; 10. Limiting groove; 11. Rotary groove; 12. Insertion bar; 13. Slot; 14. Mounting plate; 15. Mounting groove; 16. Inner groove; 17. Locking block; 18. Pressing block; 19. Base plate; 20. Reflector; 21. Suction pipe; 22. L-shaped rod; 23. Top pipe; 24. Liquid pump; 25. Drain pipe; 26. Arched plate; 27. Fixing block; 28. Sleeve; 29. ​​Air duct; 30. Mounting sleeve; 31. Rotating cylinder; 32. Rotating block; 33. Screw block; 34. Second fixing bar;

[0033] 35. Rotating shaft; 36. Flip plate; 37. Annular groove; 38. Limiting plate; 39. Guide plate; 40. Magnetic block. Detailed Implementation

[0034] The following is in conjunction with the appendix Figures 1-10 The present invention will be described in further detail below.

[0035] This invention discloses an oil-immersed transformer, including a transformer body 1 and a bottom beam 2. The transformer body 1 is fixedly installed on two bottom beams 2. A reflective drying structure is provided on the bottom beams 2. A liquid pumping structure is provided inside the transformer body 1. Four sets of heat dissipation fins 3 are provided on the four sides of the transformer body 1 through a folding structure.

[0036] The folding structure includes four sets of horizontal bars 4 on the side of the transformer body 1. The horizontal bars 4 are mounted on the transformer body 1 via an installation structure. Each horizontal bar 4 is connected to multiple first fixing bars 5 at equal intervals. A limiting groove 10 is formed on the first fixing bar 5 along its length. A rotating groove 11 is formed on the first fixing bar 5 connecting one end of the limiting groove 10. A limiting bar 8 is slidably arranged in each limiting groove 10. A guide surface 9 is provided at the two corners of the limiting bar 8 near the side of the transformer body 1. The guide surface 9 is an inclined surface. At the same time, heat dissipation fins 3 are installed between two vertical limiting bars 8. The end of the limiting bar 8 away from the heat dissipation fins 3 is connected to a vertical rod 6. The vertical rod 6 is connected by threads. A nut 7 is rotatably fitted onto the transformer body 1. An insertion strip 12 is provided on one side of the heat dissipation fin 3 near the transformer body 1. A slot 13 is provided on the side of the transformer body 1 for the insertion strip 12 to be inserted. When handling or transporting the transformer, firstly, the nut 7 is loosened on the vertical rod 6. The limiting strip 8 is moved in the limiting groove 10 of the first fixing strip 5, which drives the insertion strip 12 at one end of the heat dissipation fin 3 to be pulled out from the slot 13 on the transformer body 1. When the vertical rod 6 moves to the rotating groove 11 at one end of the first fixing strip 5, the vertical rod 6 is rotated in the rotating groove 11, thereby folding the heat dissipation fin 3 onto the transformer body 1, thereby reducing the space occupied by the transformer and facilitating handling or transport.

[0037] Multiple arched plates 26 are evenly spaced on the side of the transformer body 1. The arched plates 26 and the heat dissipation fins 3 are spaced apart from each other. The arched plates 26 increase the contact area with the outside air, thereby improving the heat dissipation effect.

[0038] The reflective drying structure includes a base plate 19 connected between two base beams 2. An inclined surface is provided on the base plate 19, and a reflector 20 is installed on the inclined surface of the base plate 19. The reflector 20 reflects sunlight to the bottom of the transformer body 1, reducing the corrosion of the bottom of the transformer body 1 due to moisture and extending the service life of the transformer body 1.

[0039] See Figures 4-6 The installation structure includes an installation plate 14 installed on the horizontal bar 4. The transformer body 1 has an installation groove 15 for the installation plate 14 to be inserted into. A locking structure is provided between the installation plate 14 and the installation groove 15.

[0040] The engaging structure includes inner grooves 16 formed near both ends within the mounting plate 14. A locking block 17 is disposed within the inner groove 16. Locking slots are formed on both ends of the mounting groove 15. One end face of the locking block 17 is inclined, and a connecting strip is connected to the locking block 17. The connecting strip is disposed within the inner groove 16, and one end of the connecting strip is connected to a pressing block 18. A spring connects the connecting strip to the groove wall of the inner groove 16. Two openings are formed on the groove wall of the inner groove 16, allowing the locking block 17 and the pressing block 18 to move through. A draft structure is provided above the side of the transformer body 1. The mounting plate 14 is inserted into the mounting groove 15 on the transformer body 1. During the process, the inclined surface of the locking block 17 presses against the wall of the mounting groove 15, pushing the locking block 17 to move into the inner groove 16, compressing the spring. When the mounting plate 14 is fully inserted into the mounting groove 15, the spring force pushes the locking block 17 into the slot, thus enabling the installation of the heat dissipation fins 3 and the folding structure on the transformer body 1. During disassembly, the button 18 can be pressed to push the locking block 17 out of the slot, and then the mounting plate 14 can be directly pulled out from the mounting groove 15, thus enabling the disassembly of the heat dissipation fins 3 on the transformer body 1. The operation is simple and convenient, and the folding structure and heat dissipation fins 3 can be reused.

[0041] See Figure 1 , Figure 6 and Figure 8 The pumping structure includes multiple L-shaped rods 22 connected to the lower inner wall of the transformer body 1. One end of each L-shaped rod 22 is fitted with an installation sleeve 30, and a pumping pump 24 is installed in the installation sleeve 30. The outlet end of the pumping pump 24 is connected to a drain pipe 25, and the inlet end of the pumping pump 24 is connected to a top pipe 23. Multiple suction pipes 21 are connected at equal angles around the circumference of the top pipe 23. When the transformer is working, the pumping pump 24 can be started to draw in cold oil from the top of the transformer body 1 through the suction pipes 21. The pumped cold oil is discharged from the bottom of the transformer body 1 through the drain pipe 25. The downward flow of cold oil and the upward flow of hot oil promote uniform temperature and reduce localized overheating of components such as the core.

[0042] See Figures 8-10 The air-guiding structure includes a fixing block 27 connected to the upper mounting plate 14. A sleeve 28 is set on the fixing block 27 by a fastening structure. Two air-guiding plates 29 are fixedly set on the sleeve 28. A magnetic block 40 is fixedly embedded on the sleeve 28. A guide plate 39 is installed on each of the two heat dissipation fins 3 on both sides. One side of the guide plate 39 is inclined towards the middle.

[0043] The fastening structure includes a screw block 33 mounted on a fixed block 27, a rotating cylinder 31 that rotates through a sleeve 28, one end of the rotating cylinder 31 being screwed onto the screw block 33 by a thread, a rotating block 32 being provided at the other end of the rotating cylinder 31, and a flipping structure being provided between the rotating cylinder 31 and the screw block 33.

[0044] The flipping structure includes a second fixing strip 34 connected to the screw block 33. One end of the second fixing strip 34 rotatably passes through a rotating shaft 35. A flipping plate 36 is fixedly sleeved on the rotating shaft 35. An annular groove 37 is formed on the flipping plate 36. A limiting disc 38 is movably sleeved in the annular groove 37. The limiting disc 38 is fixedly set on the inner wall of the rotating cylinder 31. External airflow is guided from the inclined surface of the guide plate 39 to the air duct 29, which blows the air duct 29 to rotate the inclined surface around the rotating cylinder 31. Through the inclined air duct 29, the airflow can be guided to various... Between the heat dissipation fins 3, the air flowing between the heat dissipation fins 3 can better remove the heat from the heat dissipation fins 3, thereby improving the heat dissipation effect. When handling or transporting the transformer body 1, the rotating block 32 is used to rotate the rotating drum 31, and one end of the rotating drum 31 is rotated off the screw block 33. Then the rotating drum 31 is pulled out from the second fixing bar 34, and the flipping plate 36 is rotated around the rotating shaft 35 as the axis, thereby flipping the air guide plate 29 downward onto the folded heat dissipation fins 3, thereby further reducing the space occupied by the transformer and facilitating transportation.

[0045] The implementation principle of an oil-immersed transformer according to an embodiment of the present invention is as follows: When the transformer is in operation, the pump 24 is started, and cold oil at the top of the transformer body 1 is drawn in through the suction pipe 21. The drawn-in cold oil is discharged from the bottom of the transformer body 1 through the drain pipe 25. The downward flow of cold oil and the upward flow of hot oil promote uniform temperature and reduce local heating of components such as the core. The outside air is guided from the inclined surface of the guide plate 39 to the air duct 29, which blows the air duct 29 to rotate the inclined surface around the rotating cylinder 31. Through the inclined air duct 29, the airflow can be guided between the heat dissipation fins 3. The air flowing between the heat dissipation fins 3 can better remove the heat from the heat dissipation fins 3, thereby improving the heat dissipation effect. When transporting the transformer, firstly, loosen the nut 7 on the vertical rod 6, move the limiting bar 8 in the limiting groove 10 of the first fixing bar 5, and drive the insertion bar 12 at one end of the heat dissipation fin 3 to be pulled out from the slot 13 on the transformer body 1. When the vertical rod 6 moves to the rotating groove 11 at one end of the first fixing bar 5, rotate the vertical rod 6 in the rotating groove 11, thereby folding the heat dissipation fin 3 onto the transformer body 1. Then, use the rotating block 32 to rotate the rotating cylinder 31, turn one end of the rotating cylinder 31 off the screw block 33, and then pull the rotating cylinder 31 out from the second fixing bar 34. Rotate the flipping plate 36 around the rotating shaft 35 as the axis, and flip the air duct 29 downward onto the folded heat dissipation fin 3, thereby reducing the space occupied by the transformer and making transportation more convenient.

[0046] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An oil-immersed transformer comprising a transformer main body (1) and a bottom beam (2), characterized by: The transformer body (1) is fixedly installed on two bottom beams (2), the bottom beam (2) is provided with a reflective drying structure, the transformer body (1) is provided with a liquid pumping structure, and the four sides of the transformer body (1) are provided with four groups of heat dissipation fins (3) through the folding structure. The folding structure includes four groups of horizontal bars (4) arranged on the side of the transformer body (1), the horizontal bars (4) are arranged on the transformer body (1) through the mounting structure, a plurality of first fixing bars (5) are connected to each horizontal bar (4) at equal intervals, a limiting groove (10) is formed in the length direction of the first fixing bar (5), a rotating groove (11) is formed in one end of the limiting groove (10), a limiting bar (8) is slidably arranged in each limiting groove (10), the two corners of the limiting bar (8) close to the side of the transformer body (1) are provided with guide surfaces (9), the guide surfaces (9) are inclined surfaces, and the heat dissipation fins (3) are arranged between the two limiting bars (8) in the vertical direction, one end of the limiting bar (8) away from the heat dissipation fin (3) is connected with a vertical rod (6), the vertical rod (6) is rotatably sleeved with a nut (7) through threads, and the heat dissipation fin (3) close to the side of the transformer body (1) is provided with an insertion bar (12). A plurality of arched plates (26) are arranged on the side of the transformer body (1) at equal intervals, and the arched plates (26) and the heat dissipation fins (3) are arranged at intervals.

2. An oil immersed transformer according to claim 1, characterized in that: The mounting structure includes a mounting plate (14) mounted on the horizontal bar (4), the transformer body (1) is provided with a mounting groove (15) for the mounting plate (14) to be movably inserted, and the mounting plate (14) and the mounting groove (15) are provided with a clamping structure.

3. An oil immersed transformer according to claim 2, characterized in that: The clamping structure includes an inner groove (16) formed in the mounting plate (14) close to the two ends, a clamping block (17) is arranged in the inner groove (16), a clamping groove is formed in the groove wall of the mounting groove (15), one end surface of the clamping block (17) is an inclined surface, a connecting bar is connected to the clamping block (17), the connecting bar is arranged in the inner groove (16), one end of the connecting bar is connected with a pressing block (18), springs are connected between the connecting bar and the groove wall of the inner groove (16), two openings are formed in the groove wall of the inner groove (16) for the clamping block (17) and the pressing block (18) to be movably inserted, and an air guiding structure is arranged above the side of the transformer body (1).

4. An oil immersed transformer as claimed in claim 1, wherein: The reflective drying structure includes a bottom plate (19) connected between the two bottom beams (2), an inclined surface is arranged on the top surface of the bottom plate (19), and a reflector (20) is mounted on the inclined surface of the bottom plate (19).

5. An oil immersed transformer as claimed in claim 1, wherein: The liquid pumping structure comprises a plurality of L-shaped rods (22) connected to the lower inner wall of the transformer body (1), one end of the L-shaped rod (22) is provided with a mounting sleeve (30), the mounting sleeve (30) is provided with a liquid pumping pump (24), the liquid pumping pump (24) is connected with a liquid discharge pipe (25) at the outlet end, the liquid pumping pump (24) is connected with a top pipe (23) at the inlet end, and a plurality of suction pipes (21) are connected to the top pipe (23) at equal angles.

6. An oil immersed transformer according to claim 3, characterized in that: The air guide structure comprises a fixed block (27) connected to the upper mounting plate (14), a sleeve (28) is arranged on the fixed block (27) through a fastening structure, two air guide plates (29) are fixedly arranged on the sleeve (28), a magnetic block (40) is fixedly embedded on the sleeve (28), a guide plate (39) is arranged on each group of two heat dissipation fins (3) on both sides, and one side of the guide plate (39) is inclined towards the middle inclined surface.

7. An oil immersed transformer according to claim 6, characterised in that: The fastening structure comprises a screw block (33) mounted on the fixed block (27), a rotating cylinder (31) is rotatably arranged in the sleeve (28), one end of the rotating cylinder (31) is screwed on the screw block (33), the other end of the rotating cylinder (31) is provided with a rotating block (32), and a turnover structure is arranged between the rotating cylinder (31) and the screw block (33).

8. An oil immersed transformer according to claim 7, characterized in that: The turnover structure comprises a second fixed strip (34) connected to the screw block (33), one end of the second fixed strip (34) rotatably penetrates through a rotating shaft (35), the rotating shaft (35) is fixedly sleeved with a turnover plate (36), an annular groove (37) is formed in the turnover plate (36), a limiting disc (38) is movably sleeved in the annular groove (37), and the limiting disc (38) is fixedly arranged on the inner wall of the rotating cylinder (31).

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