An oil-immersed roll core transformer

Abstract

The application relates to the field of transformers and discloses an oil-immersed roll core transformer which comprises a transformer body and a top cover, the top cover is arranged on the transformer body through a jacking structure, a blocking structure is arranged between the top cover and the transformer body, suction structures are arranged on the left and right sides of the transformer body, a fastening structure is arranged between the top cover and the transformer body, when the internal damaged components of the transformer need to be repaired, the top cover can be directly lifted from above the transformer body through the jacking structure, the components in the transformer body are taken out, the top cover is moved upwards, the blocking structure is opened, meanwhile, the suction structures are driven to suck the insulating oil in the transformer body, the problem that the insulating oil in the transformer body is spilled in the process of lifting the top cover to take out the components is avoided, waste is reduced, the components are taken out by moving the top cover upwards, the difficulty of the maintenance work on the internal components of the transformer is greatly reduced, and the maintenance work efficiency is improved.

Description

Technical Field

[0001] This invention relates to the technical field of transformers, and in particular to an oil-immersed wound core transformer. Background Technology

[0002] An oil-immersed iron-core transformer is a power device that uses insulating oil as the medium and an iron core as the magnetic circuit. It achieves voltage conversion through the principle of electromagnetic induction.

[0003] In existing transformers, the overall temperature of the transformer oil inside the main body of the wound-core transformer will rise during operation. To ensure stable cooling effect of the transformer oil on the main body of the wound-core transformer, a heat dissipation frame is installed on the front side of the main body of the wound-core transformer to pre-cool the outer wall of the main body. At the same time, the transformer oil can be guided into the five oil guide pipes inside the heat dissipation frame, so that the transformer oil is guided from the bottom to the top along the oil guide pipes to form a circulation and return structure. In the process of transformer oil circulation, with the assistance of heat dissipation pipes connected to the outside of the oil guide pipes, rapid heat dissipation and cooling can be achieved, ensuring stable cooling of the wound core structure inside the main body of the wound-core transformer by the transformer oil. In this way, the stable use of the oil-immersed wound-core transformer can be achieved.

[0004] However, when internal components of the transformer are damaged and require repair, the transformer body contains insulating oil, and multiple bolts between the transformer body and the top cover need to be removed during repair, which increases the difficulty of the repair work. Therefore, there is room for improvement. Summary of the Invention

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

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

[0007] An oil-immersed wound core transformer includes a transformer body and a top cover. The top cover is mounted on the transformer body via a lifting structure. A sealing structure is provided between the top cover and the transformer body. Suction structures are provided on the left and right sides of the transformer body. A fastening structure is provided between the top cover and the transformer body. A storage structure is provided near the middle on the left and right sides of the transformer body. A foot pedal is provided below the transformer body via a retractable structure. Heat dissipation fins are provided on both the front and rear sides of the transformer body. Components inside the transformer body are mounted on the top cover. A sealing structure is provided between the top cover and the transformer body.

[0008] The lifting structure includes a mounting base fastened to the side corner of the transformer body by bolts, a hydraulic cylinder mounted on the mounting base, a lifting plate connected to the top of the output shaft of the hydraulic cylinder, a fixed column connected to the top corner of the top cover, and the top of the lifting plate movably sleeved on the fixed column.

[0009] The suction structure has suction holes on the left and right sides of the transformer body. Suction tubes are connected to the suction holes on both sides of the transformer body. A pull rod is movably inserted into the suction tube. A piston is set at one end of the pull rod inserted into the suction tube. The top end of the pull rod is connected to the top cover.

[0010] The sealing structure includes a fixing strip connected to the bottom of the top cover near the suction hole, a sealing block is provided at the bottom end of the fixing strip, and a sleeve is provided on the inner wall of the transformer body at the suction hole.

[0011] Preferably, the sealing structure includes a sealing frame installed on the lower edge of the top cover, a sealing groove is opened on the upper part of the inner wall of the transformer body, and a sealing gasket is provided below the sealing frame.

[0012] Preferably, the fastening structure includes first sliding grooves on the left and right sides of the top cover, a first slider is slidably disposed in the first sliding groove, a moving strip is fixedly inserted into the first slider, a pressure-bearing structure is provided at both ends of the moving strip, and a fastening plate is fastened to the moving strip by bolts, and fastening grooves are provided on the upper left and right sides of the transformer body.

[0013] Preferably, the pressure-bearing structure includes pressure plates connected to both ends of the moving bar, and a pressure wheel is provided at one end of the pressure plate.

[0014] Preferably, the placement structure includes a fixed plate installed on the left and right sides of the transformer body, the bottom end of the fixed plate rotates through a flipping rod, a flipping plate is fixedly sleeved on the flipping rod, elastic bands are connected between the two sides of the flipping plate and the fixed plate, and a driving structure is provided between the flipping rod and the lifting plate.

[0015] Preferably, the driving structure includes a first rotating tube connected to one end of the flipping rod, a first spiral groove formed on the first rotating tube, a first fixed rod movably inserted into the first rotating tube, one end of the first fixed rod connected to a first insert rod, the first insert rod movably inserted into the first spiral groove, the other end of the first fixed rod connected to a driving plate, a second slider mounted on the driving plate, the second slider slidably disposed in a second sliding groove formed on the transformer body, a driving groove formed on the driving plate, a driving rod movably inserted into the driving groove, one end of the driving rod connected to a lifting plate.

[0016] Preferably, the retractable structure includes a mounting block installed in the middle of the lower part of the transformer body. A bidirectional motor is installed inside the mounting block. Each of the two output shafts of the bidirectional motor is connected to a screw. Each screw is provided with a pull-out frame. The pull-out frame has a threaded groove for the screw to pass through. The foot pedal is set on the pull-out frame through a lifting structure.

[0017] Preferably, the lifting structure includes grooves on the front and rear sides of the pull-out frame, through which a second rotating tube rotates. A second spiral groove is formed on the second rotating tube, and a second fixed rod is movably inserted into the second rotating tube. One end of the second fixed rod is connected to a second insert rod, which is movably inserted into the second spiral groove. One end of the second fixed rod is connected to the transformer body. A through groove is formed on the pull-out frame, and a curved rod is fixedly sleeved at one end of the second rotating tube, which is rotatably inserted into the through groove. One end of the curved rod is rotatably connected to the foot pedal.

[0018] In summary, the present invention has the following beneficial technical effects:

[0019] 1. This invention, by setting up a lifting structure, a suction structure, and a sealing structure, allows for the direct lifting of the top cover from above the transformer body when repairing damaged components inside the transformer. This lifts the components out of the transformer body, and the upward movement of the top cover opens the sealing structure. Simultaneously, the suction structure draws out the insulating oil inside the transformer body, preventing the insulating oil from overflowing during the process of lifting the top cover to remove the components, thus reducing waste. Furthermore, the upward movement of the top cover to remove the components significantly reduces the difficulty of repairing the components inside the transformer and improves the efficiency of the repair work.

[0020] 2. By setting up a fastening structure and a pressure-bearing structure, when the lifting structure moves the top cover down to the transformer body, the pressure-bearing structure can automatically fasten the top cover to the transformer body for installation, making the fastening work between the top cover and the transformer body simpler and more convenient.

[0021] 3. By setting up a storage structure and a driving structure, the storage structure can be automatically unfolded during the process of the top cover being lifted. In this way, during maintenance, maintenance personnel can store the maintenance tools they need in the storage structure, making it convenient to retrieve and put away maintenance tools during the maintenance process.

[0022] 4. By setting up a foot pedal, a retractable structure, and a lifting structure, this invention increases the maintenance height because the upward movement of the top cover lifts the internal components of the transformer. The foot pedal can be moved out from under the transformer body through the retractable structure, and during the removal process, the lifting structure drives the foot pedal to move automatically upward. During maintenance, maintenance personnel can stand on the foot pedal to perform maintenance, which facilitates the maintenance work. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of an oil-immersed wound core transformer according to an embodiment of the present invention;

[0024] Figure 2 This is an embodiment of the present invention. Figure 1 Enlarged view of the structure at point A;

[0025] Figure 3 This is an embodiment of the present invention. Figure 1 Enlarged view of the structure at point B;

[0026] Figure 4 This is a schematic diagram of the structure below the transformer body in an embodiment of the present invention;

[0027] Figure 5 This is an embodiment of the present invention. Figure 4 Enlarged view of the structure at point C;

[0028] Figure 6 This is a schematic diagram of the retractable structure and the pedal in an embodiment of the present invention;

[0029] Figure 7 This is an embodiment of the present invention. Figure 6 Enlarged view of the structure at point D.

[0030] Explanation of reference numerals in the attached drawings: 1. Transformer body; 2. Top cover; 3. Suction hole; 4. Sleeve plate; 5. Fixing strip; 6. Sealing block; 7. Suction pipe; 8. Pull rod; 9. Sealing groove; 10. Sealing frame; 11. Mounting base; 12. Hydraulic cylinder; 13. Lifting plate; 14. Fixing column; 15. Heat dissipation fins; 16. First slider; 17. First slide groove; 18. Moving strip; 19. Fastening plate; 20. Pressure plate; 21. Pressure roller; 22. Fastening groove; 23. Fixing plate; 24. Flip 25. Rotating rod; 26. Flipping plate; 27. Elastic band; 28. First rotating tube; 29. ​​First spiral groove; 30. First fixing rod; 31. Driving plate; 32. Driving rod; 33. Second slider; 34. Second sliding groove; 35. Mounting block; 36. Bidirectional motor; 37. Screw; 38. Pull-out frame; 39. Foot pedal; 40. Groove; 41. Second rotating tube; 42. Second fixing rod; 43. Second insert rod; 44. Second spiral groove; 45. Through groove; 46. Curved rod. Detailed Implementation

[0031] The following is in conjunction with the appendix Figures 1-7 The present invention will be described in further detail below.

[0032] Reference Figures 1-7This invention discloses an oil-immersed wound core transformer, including a transformer body 1 and a top cover 2. The top cover 2 is installed on the transformer body 1 through a lifting structure. A sealing structure is provided between the top cover 2 and the transformer body 1. Suction structures are provided on the left and right sides of the transformer body 1. A fastening structure is provided between the top cover 2 and the transformer body 1. A storage structure is provided near the middle on the left and right sides of the transformer body 1. A foot pedal 39 is provided under the transformer body 1 through a retractable structure. Heat dissipation fins 15 are provided on both the front and rear sides of the transformer body 1. Components inside the transformer body 1 are installed on the top cover 2. A sealing structure is provided between the top cover 2 and the transformer body 1.

[0033] The lifting structure includes a mounting base 11 fastened to the side corner of the transformer body 1 by bolts, a hydraulic cylinder 12 mounted on the mounting base 11, a lifting plate 13 connected to the top of the output shaft of the hydraulic cylinder 12, a fixing column 14 connected to the top corner of the top cover 2, and the top of the lifting plate 13 movably sleeved on the fixing column 14.

[0034] The suction structure is provided with suction holes 3 on the left and right sides of the transformer body 1. Suction pipes 7 are connected to the suction holes 3 on both sides of the transformer body 1. A pull rod 8 is movably inserted into the suction pipe 7. A piston is provided at one end of the pull rod 8 inserted into the suction pipe 7. The top end of the pull rod 8 is connected to the top cover 2.

[0035] The sealing structure includes a fixing strip 5 connected to the bottom of the top cover 2 near the suction hole 3, with a sealing block 6 at the bottom of the fixing strip 5. A sleeve plate 4 is installed on the inner wall of the transformer body 1 at the suction hole 3. When it is necessary to repair damaged components inside the transformer, the hydraulic cylinder 12 on the mounting base 11 is activated to move the top cover 2 upward. The top cover 2 moves the sealing block 6 at the bottom of the fixing strip 5 out of the sleeve plate 4, opening the suction hole 3. At the same time, the top cover 2 moves the piston at the bottom of the pull rod 8 upward in the suction pipe 7, drawing some of the insulating oil inside the transformer body 1 into the suction pipe 7. This prevents some insulating oil from overflowing from the transformer body 1 during the lifting process of the top cover 2 and the components inside the transformer, thus avoiding waste. In this way, after the top cover 2 is lifted and the components are taken out, it facilitates the maintenance work of the maintenance personnel.

[0036] See Figure 1 and Figure 2 The sealing structure includes a sealing frame 10 installed on the lower edge of the top cover 2, a sealing groove 9 opened on the upper part of the inner wall of the transformer body 1, and a sealing gasket set below the sealing frame 10. When the top cover 2 moves down and closes to the transformer body 1, the top cover 2 drives the sealing gasket on the sealing frame 10 to be inserted into the sealing groove 9 to improve the sealing performance between the top cover 2 and the transformer body 1.

[0037] The fastening structure includes a first sliding groove 16 on the left and right sides of the top cover 2, a first sliding block 17 is slidably arranged in the first sliding groove 16, a moving strip 18 is fixedly inserted into the first sliding block 17, a pressure structure is provided at both ends of the moving strip 18, and a fastening plate 19 is fastened to the moving strip 18 by bolts. Fastening grooves 22 are opened on the upper left and right sides of the transformer body 1.

[0038] The pressure-bearing structure includes pressure plates 20 connected to both ends of the moving bar 18. One end of the pressure plate 20 is provided with a pressure wheel 21. When the top cover 2 moves down and tightens onto the transformer body 1, as the hydraulic cylinder 12 drives the lifting plate 13 to continue moving down, the top of the lifting plate 13 moves up and down on the fixed column 14. The top of the moving lifting plate 13 presses against the pressure wheel 21, pushing the moving bar 18 and the fastening plate 19 to move as a whole toward one side of the transformer body 1. The fastening plate 19 is inserted into the fastening groove 22 on the transformer body 1 to automatically fasten the top cover 2 and the transformer body 1.

[0039] See Figure 4 and Figure 5 The storage structure includes a fixed plate 23 installed on the left and right sides of the transformer body 1. The bottom end of the fixed plate 23 rotates through the flipping rod 24. A flipping plate 25 is fixedly sleeved on the flipping rod 24. Elastic bands 26 are connected between the two sides of the flipping plate 25 and the fixed plate 23. A driving structure is provided between the flipping rod 24 and the lifting plate 13.

[0040] The driving structure includes a first rotating tube 27 connected to one end of a flipping rod 24. A first spiral groove 28 is formed on the first rotating tube 27. A first fixed rod 29 is movably inserted into the first rotating tube 27. One end of the first fixed rod 29 is connected to a first insert rod, which is movably inserted into the first spiral groove 28. The other end of the first fixed rod 29 is connected to a driving plate 30. A second slider 33 is mounted on the driving plate 30. The second slider 33 is slidably disposed in a second sliding groove 34 formed on the transformer body 1. A driving groove 32 is formed on the driving plate 30. A driving rod 31 is movably inserted into the driving groove 32. One end of the driving rod 31 is connected to a lifting plate 13. The lifting plate 13... During the upward movement of the top cover 2, the lifting plate 13 drives one end of the driving rod 31 to slide upward in the driving groove 32 of the driving plate 30. By using the pressure of the driving rod 31 on the groove wall of the driving groove 32, the driving plate 30 is pushed to move closer to the fixed plate 23. This causes the first insertion rod at one end of the first fixed rod 29 to press against the groove wall of the first spiral groove 28 on the first rotating tube 27, pushing the flip plate 25 to rotate out on the fixed plate 23. In this way, the storage space between the fixed plate 23, the flip plate 25 and the elastic band 26 can be used to store the tools used by maintenance personnel during maintenance, thereby facilitating the maintenance work of maintenance personnel.

[0041] See Figure 4 , Figure 6 and Figure 7The retractable structure includes a mounting block 35 installed in the middle of the lower part of the transformer body 1. A bidirectional motor 36 is installed inside the mounting block 35. A screw 37 is connected to each of the two output shafts of the bidirectional motor 36. A pull-out frame 38 is provided on each screw 37. A threaded groove for the screw 37 to pass through is opened on the pull-out frame 38. The foot pedal 39 is set on the pull-out frame 38 through a lifting structure.

[0042] The lifting structure includes grooves 40 on the front and rear sides of the pull-out frame 38, through which a second rotating tube 41 rotatably passes. A second spiral groove 44 is formed on the second rotating tube 41, and a second fixed rod 42 is movably inserted into the second rotating tube 41. One end of the second fixed rod 42 is connected to a second insert rod 43, which movably inserts into the second spiral groove 44. One end of the second fixed rod 42 is connected to the transformer body 1. A through groove 45 is formed on the pull-out frame 38, and a curved rod 46 is fixedly fitted onto one end of the second rotating tube 41, which is rotatably inserted into the through groove 45. One end of the curved rod 46 is rotatably connected to the foot pedal 39. The top cover 2 is... When repairing internal components of the transformer, the bidirectional motor 36 on the starting mounting block 35 drives the two screws 37 to rotate, and the two pull-out frames 38 move away from each other, thereby removing the foot pedal 39 below the transformer body 1. During the removal process, the pull-out frames 38 drive the second rotating tube 41 to move on the second fixed rod 42. By using the second insert rod 43 to squeeze the second spiral groove 44, the crank rod 46 is driven to rotate, so that the foot pedal 39 automatically moves upward during the removal process. This allows the maintenance personnel to stand on the foot pedal 39 to repair the removed components.

[0043] The implementation principle of an oil-immersed wound core transformer according to an embodiment of the present invention is as follows: When it is necessary to repair damaged components inside the transformer, the hydraulic cylinder 12 on the mounting base 11 is activated to move the top cover 2 upward. The top cover 2 moves the bottom sealing block 6 of the fixing strip 5 out of the sleeve plate 4, opening the suction hole 3. At the same time, the top cover 2 moves the bottom piston of the pull rod 8 upward in the suction pipe 7, drawing some insulating oil from the transformer body 1 into the suction pipe 7. This avoids the situation where some insulating oil overflows from the transformer body 1 during the lifting process of the top cover 2 and the components inside the transformer, resulting in waste. In this way, after the top cover 2 lifts out the components, it can better expose the components, which is more convenient for maintenance personnel. Furthermore, the upward movement of the lifting plate 13 causes one end of the driving rod 31 to slide upward in the driving groove 32 of the driving plate 30. The squeezing of the groove wall of the driving rod 31 pushes the driving plate 30 towards the fixing plate 23, thereby driving the transformer body 1 to move upward. The first insert at one end of the first fixed rod 29 presses against the wall of the first spiral groove 28 on the first rotating tube 27, pushing the flip plate 25 to rotate out on the fixed plate 23. The storage space between the fixed plate 23, the flip plate 25, and the elastic band 26 can be used to store tools used by maintenance personnel. At the same time, the bidirectional motor 36 on the mounting block 35 can be activated to drive the two screws 37 to rotate, and the two pull-out frames 38 move away from each other, thereby removing the foot pedal 39 below the transformer body 1. During the removal process, the pull-out frame 38 drives the second rotating tube 41 to move on the second fixed rod 42. The second insert 43 presses against the second spiral groove 44, causing the crank 46 to rotate, so that the foot pedal 39 automatically moves upward during the removal process. This allows maintenance personnel to stand on the foot pedal 39 to repair the removed components, greatly reducing the difficulty of maintenance and increasing the efficiency of maintenance work.

[0044] 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 wound core transformer, comprising a transformer body (1) and a top cover (2), characterized in that: The transformer body (1) is provided with a top cover (2) by a lifting structure. A sealing structure is provided between the top cover (2) and the transformer body (1). A suction structure is provided on the left and right sides of the transformer body (1). A fastening structure is provided between the top cover (2) and the transformer body (1). A storage structure is provided on the left and right sides of the transformer body (1) near the middle. A foot pedal (39) is provided under the transformer body (1) by a retractable structure. Heat dissipation fins (15) are provided on both the front and rear sides of the transformer body (1). The internal components of the transformer body (1) are installed on the top cover (2). A sealing structure is provided between the top cover (2) and the transformer body (1). The lifting structure includes a mounting base (11) fastened to the side corner of the transformer body (1) by bolts, a hydraulic cylinder (12) is mounted on the mounting base (11), the top of the output shaft of the hydraulic cylinder (12) is connected to a lifting plate (13), a fixing column (14) is connected to the top corner of the top cover (2), and the top of the lifting plate (13) is movably sleeved on the fixing column (14); The suction structure is provided with suction holes (3) on the left and right sides of the transformer body (1). Suction pipes (7) are connected to the suction holes (3) on both sides of the transformer body (1). A pull rod (8) is movably inserted into the suction pipe (7). A piston is provided at one end of the pull rod (8) inserted into the suction pipe (7). The top end of the pull rod (8) is connected to the top cover (2). The sealing structure includes a fixing strip (5) connected to the bottom of the top cover (2) near the suction hole (3), a sealing block (6) is provided at the bottom end of the fixing strip (5), and a sleeve plate (4) is provided on the inner wall of the transformer body (1) at the suction hole (3). The fastening structure includes a first sliding groove (16) on the left and right sides of the top cover (2), a first slider (17) is slidably arranged in the first sliding groove (16), a moving strip (18) is fixedly inserted into the first slider (17), a pressure structure is provided at both ends of the moving strip (18), and a fastening plate (19) is fastened to the moving strip (18) by bolts. Fastening grooves (22) are opened on the upper left and right sides of the transformer body (1). The pressure structure includes pressure plates (20) connected to both ends of the moving bar (18), and a pressure wheel (21) is provided at one end of the pressure plate (20).

2. The oil-immersed wound core transformer according to claim 1, characterized in that: The sealing structure includes a sealing frame (10) installed on the lower edge of the top cover (2), a sealing groove (9) is opened on the upper part of the inner wall of the transformer body (1), and a sealing gasket is provided below the sealing frame (10).

3. The oil-immersed wound core transformer according to claim 1, characterized in that: The storage structure includes a fixed plate (23) installed on the left and right sides of the transformer body (1). The bottom end of the fixed plate (23) rotates through the flipping rod (24). A flipping plate (25) is fixedly sleeved on the flipping rod (24). Elastic bands (26) are connected between the two sides of the flipping plate (25) and the fixed plate (23). A driving structure is provided between the flipping rod (24) and the lifting plate (13).

4. The oil-immersed wound core transformer according to claim 3, characterized in that: The driving structure includes a first rotating tube (27) connected to one end of a flipping rod (24), a first spiral groove (28) opened on the first rotating tube (27), a first fixed rod (29) movably inserted into the first rotating tube (27), one end of the first fixed rod (29) connected to a first insert rod, the first insert rod movably inserted into the first spiral groove (28), the other end of the first fixed rod (29) connected to a driving plate (30), a second slider (33) installed on the driving plate (30), the second slider (33) slidably disposed in a second sliding groove (34) opened on the transformer body (1), a driving groove (32) opened on the driving plate (30), a driving rod (31) movably inserted into the driving groove (32), one end of the driving rod (31) connected to a lifting plate (13).

5. The oil-immersed wound core transformer according to claim 1, characterized in that: The retractable structure includes a mounting block (35) installed in the middle of the lower part of the transformer body (1). A bidirectional motor (36) is installed in the mounting block (35). A screw (37) is connected to each of the two output shafts of the bidirectional motor (36). A pull-out frame (38) is provided on each screw (37). A threaded groove is provided on the pull-out frame (38) for the screw (37) to pass through. The foot pedal (39) is set on the pull-out frame (38) through a lifting structure.

6. The oil-immersed wound core transformer according to claim 5, characterized in that: The lifting structure includes grooves (40) on the front and rear sides of the pull-out frame (38), through which a second rotating tube (41) rotates. A second spiral groove (44) is opened on the second rotating tube (41), and a second fixed rod (42) is movably inserted into the second rotating tube (41). One end of the second fixed rod (42) is connected to a second insert rod (43), which is movably inserted into the second spiral groove (44). One end of the second fixed rod (42) is connected to the transformer body (1). A through groove (45) is opened on the pull-out frame (38), and a curved rod (46) is fixedly sleeved at one end of the second rotating tube (41) which is rotatably inserted into the through groove (45). One end of the curved rod (46) is rotatably connected to the foot pedal (39).

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