An oil-immersed iron core transformer

Abstract

The present invention relates to the field of transformers, and discloses an oil-immersed iron core transformer, comprising a mounting frame and a transformer body, wherein the transformer body is fixedly mounted in the middle of the upper portion of the mounting frame, and the two ends of the mounting frame are fastened to two electric poles through a fastening structure, and a side sealing plate is mounted on the side of the transformer body through a rotating structure, and a climbing structure is arranged at the lower portion of the mounting frame, and a side sealing plate is arranged on the transformer body through a rotating structure, and an automatic retractable structure is arranged on the transformer body, and during maintenance, the four side sealing plates on the transformer body can be opened simultaneously through the automatic retractable structure and the rotating structure to support the transformer body on the mounting frame, so that not only the components inside the transformer body can be better exposed for maintenance, but also maintenance personnel can stand on the side sealing plates for maintenance work, thereby increasing the range of activities of the operators and reducing the difficulty of the maintenance personnel's work.

Description

Technical Field

[0001] The invention relates to the technical field of transformers, and in particular to an oil-immersed iron core transformer. Background Art

[0002] The oil-immersed transformer is a new type of high-performance transformer with a more reasonable structure and better performance. The three core columns of the three-dimensional wound core are arranged in an equilateral triangle. There is no air gap in the magnetic circuit, the winding is tighter, the three magnetic circuits are the same length and the shortest, and the cross-sectional area of ​​the core column is closer to a circle. Therefore, the performance is further improved, the loss is reduced, the noise is reduced, the three items are balanced, and the third harmonic component is reduced. This product is more suitable for the transformation of urban and rural, industrial and mining enterprise power grids, and is more suitable for combined transformers and prefabricated transformer substation transformers;

[0003] The transformer in the prior art can realize the dual fixation of the distribution box and the transformer, which provides convenience for the installation and arrangement of the distribution equipment. After installation, the distance between the distribution box and the transformer is increased, the heat dissipation effect and line arrangement are improved, and the safety of regional operations is improved. The support device provides a support height for the installation of the transformer, making it safer to use. The fixing position between the support device and the electric pole is low, which is convenient for the construction personnel to disassemble and assemble, and reduces the difficulty and danger of disassembly and assembly.

[0004] However, since the transformer is installed on the utility pole, when the transformer on the utility pole needs to be repaired, it is necessary to use tools manually or climb to the transformer for maintenance, and the maintenance workpieces at the transformer on the utility pole are limited, which increases the difficulty of the maintenance work of the maintenance personnel and reduces the work efficiency. Therefore, there is room for improvement. Summary of the invention

[0005] In order to solve the problems raised in the above background technology, the present invention provides an oil-immersed iron core transformer.

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

[0007] An oil-immersed iron core transformer comprises a mounting frame and a transformer body, wherein the transformer body is fixedly mounted in the middle of the upper part of the mounting frame, and the two ends of the mounting frame are fastened to two electric poles through a fastening structure, and a side sealing plate is mounted on the side of the transformer body through a rotating structure, and a climbing structure is arranged at the lower part of the mounting frame, and a protective structure is arranged at the upper part of each side sealing plate;

[0008] The rotating structure comprises a first fixed block connected to the lower side of each transformer body near two corners, a rotating rod is rotatably passed through the two first fixed blocks of each group, a side sealing plate is fixedly sleeved on the rotating rod, a splicing structure is provided on each side sealing plate, an opening is provided in the middle of the side sealing plate near one side of the transformer body, a first gear is fixedly sleeved on the rotating rod at the position of the opening, and an automatic retractable structure is provided between the transformer body and the side sealing plate;

[0009] The automatic retracting and releasing structure includes an installation cavity provided in the lower inner wall of the transformer main body, a motor is installed in the installation cavity, and a driving plate is fixedly connected to the bottom end of the motor output shaft passing through the bottom of the transformer main body, and a through groove is provided at the inner wall of the mounting frame corresponding to the position of each first gear, a driving plate movably passes through the through groove, and the side surface of the driving plate is attached to the inner groove wall of the through groove, the driving plate extends to the bottom of the first gear, and the driving plate is provided with teeth meshing with the first gear, and a threaded groove is provided on the end surface of the driving plate away from the first gear, and a protrusion is connected to the position of each driving plate under the transformer main body, and a first screw is rotatably passed through the protrusion, one end of the first screw is rotatably inserted into the threaded groove on the driving plate, and a bevel gear is fixedly sleeved on the other end of the first screw, and teeth meshing with the bevel gear are provided on the driving plate.

[0010] Preferably, the splicing structure includes a first receiving groove opened on both side surfaces of each side sealing plate, a transfer plate is movably inserted into each of the first receiving grooves, a side of the transfer plate away from the side sealing plate is an inclined surface, the transfer plate is inserted into a socket at a side surface of the first receiving groove near the rear end position, and a guide rod is movably inserted into the socket, and one end of the guide rod is connected to the inner groove wall of the first receiving groove.

[0011] Preferably, the protective structure includes a groove opened in the middle of the side sealing plate, a flip rod is rotatably connected to the inner wall of the groove at one end away from the transformer body, a flip plate is fixedly sleeved on the flip rod, a protective horizontal plate is connected to the top of the flip plate, protective vertical plates are connected to the bottom of the protective horizontal plate near both ends, and a second receiving groove is opened on the side sealing plate.

[0012] Preferably, an electric telescopic rod is installed on the groove wall at the other end of the groove, a push-pull plate is connected to one end of the output shaft of the electric telescopic rod, a movable plate is connected to the top of the push-pull plate, guide grooves for the movable plate to be inserted are provided on the groove walls on both sides of the groove, the side surfaces of the movable plate are fitted on the groove walls of the guide grooves, a bent rod is rotatably connected to the top of the movable plate, the top of the bent rod is rotatably connected to the flip plate, and a transmission structure is arranged between the movable plate and the corresponding two transfer plates.

[0013] Preferably, the transmission structure includes an intermediate rod that rotates through the groove walls on both sides of the groove near the middle position, the intermediate rod is located below the movable plate, a second gear is fixedly mounted on the intermediate rod, and teeth meshing with the second gear are arranged on the bottom of the movable plate, and second screws are connected to both ends of the intermediate rod inserted into the two first receiving grooves, and the threads on each group of two second screws are in opposite directions, and one end of the second screw is rotated to be inserted into the thread groove opened on the transfer plate.

[0014] Preferably, the climbing structure includes two groups of second fixed blocks connected at both ends below the mounting frame, a rotating shaft is rotatably passed through the two second fixed blocks on the left side, a fixed plate is connected between the two second fixed blocks on the right side, a ladder is fixedly mounted on the rotating shaft, a third screw is rotatably passed through a threaded groove at one end below the ladder away from the rotating shaft, a handle is installed on the bottom end of the third screw, and the top end of the third screw is rotatably inserted into the threaded groove provided on the fixing plate.

[0015] Preferably, the fastening structure includes a first fastening frame fixedly connected to both ends of the mounting frame, the two first fastening frames are symmetrically arranged with each other, a second fastening frame is hingedly connected to the mounting frame at a position close to each first fastening frame, the first fastening frame and the second fastening frame are tightly sleeved on the utility pole, the first fastening frame and the second fastening frame are fixed by bolts, and the first fastening frame and the second fastening frame are both provided with bolts that are fastened to the utility pole.

[0016] In summary, the present invention includes the following beneficial technical effects:

[0017] The transformer of the present invention is installed on the electric pole through the mounting frame, and the transformer body is provided with side sealing plates through the rotating structure, and the transformer body is provided with an automatic retractable structure. During maintenance, the four side sealing plates on the transformer body can be opened at the same time through the automatic retractable structure and the rotating structure to support the transformer body on the mounting frame, so that not only the components inside the transformer body are better exposed for maintenance, but also the maintenance personnel can stand on the side sealing plates to carry out maintenance work, thereby increasing the range of activities of the operators and reducing the difficulty of the maintenance personnel's work;

[0018] The present invention provides a splicing structure, a protective structure and a driving structure on the side sealing plate. After the side sealing plate is rotated down to support the mounting frame, the transfer plates on the splicing structure are spliced ​​together, so that the maintenance personnel can flexibly move on each side sealing plate according to the needs of the maintenance work to carry out maintenance, which further facilitates the maintenance work. When the protective horizontal plate and the protective vertical plate on the protective structure are rotated, the working safety on the side sealing plate can be improved. With the driving structure, when the protective horizontal plate and the protective vertical plate are rotated, the transfer plates on the side sealing plates are synchronously and automatically driven to move and splice together. The structure is simple and the function is practical.

[0019] The present invention provides a climbing structure on the mounting frame. When the ladder support on the climbing structure is rotated down to the ground, maintenance personnel can climb to the transformer to perform maintenance work through the ladder. When not in use, the ladder can be rotated back to the mounting frame, which not only facilitates the storage of the ladder, but also increases the firmness of the overall structure of the mounting frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an oil-immersed iron core transformer in an embodiment of the present invention;

[0021] Figure 2 is a schematic structural diagram of a fixing frame and a transformer body in an embodiment of the present invention;

[0022] Figure 3 is a schematic structural diagram of the bottom of the fixing frame in an embodiment of the present invention;

[0023] Figure 4 In the embodiment of the present invention Figure 3 A magnified view of the structure at A;

[0024] Figure 5 It is a schematic structural diagram of the side sealing plate in an embodiment of the present invention;

[0025] Figure 6 Schematic diagram of the internal structure of the side sealing plate in an embodiment of the present invention;

[0026] Figure 7 In the embodiment of the present invention Figure 6 A magnified view of the structure at B;

[0027] Figure 8 Schematic diagram of the structure of the groove of the side sealing plate in an embodiment of the present invention;

[0028] Fig. 9 In the embodiment of the present invention Figure 8 Enlarged view of the structure at location C.

[0029] Explanation of the accompanying drawings: 1. mounting frame; 2. electric pole; 3. transformer body; 4. side sealing plate; 5. first fixed block; 6. rotating rod; 7. opening; 8. first gear; 9. driving plate; 10. through groove; 11. first screw; 12. protrusion; 13. driving disk; 14. bevel gear; 15. first storage groove; 16. transfer plate; 17. groove; 18. flip plate; 19. protective horizontal plate; 20. protective vertical plate; 21. second storage groove; 22. guide rod; 23. electric telescopic rod; 24. moving plate; 25. curved rod; 26. push-pull plate; 27. guide groove; 28. second screw; 29. ​​intermediate rod; 30. second gear; 31. second fixed block; 32. fixed plate; 33. rotating shaft; 34. handle; 35. third screw; 36. ladder; 37. first fastening frame; 38. second fastening frame. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-Figure 9 The present invention is described in further detail.

[0031] The embodiment of the present invention discloses an oil-immersed iron core transformer, comprising a mounting frame 1 and a transformer body 3, wherein the transformer body 3 is fixedly mounted in the middle of the upper part of the mounting frame 1, and the two ends of the mounting frame 1 are fastened to two electric poles 2 by a fastening structure, and a side sealing plate 4 is installed on the side of the transformer body 3 by a rotating structure, and a climbing structure is arranged at the lower part of the mounting frame 1, and a protective structure is arranged at the upper part of each side sealing plate 4; the rotating structure comprises a first fixed block 5 connected to the lower part of each side of the transformer body 3 near two corners, and a rotating rod 6 is rotatably passed through the two first fixed blocks 5 of each group, and a side sealing plate 4 is fixedly sleeved on the rotating rod 6 , each side sealing plate 4 is provided with a splicing structure, an opening 7 is provided in the middle of the side sealing plate 4 near one side of the transformer body 3, a first gear 8 is fixedly sleeved at the position of the opening 7 on the rotating rod 6, and an automatic retractable structure is provided between the transformer body 3 and the side sealing plate 4; the automatic retractable structure includes an installation cavity provided in the lower inner wall of the transformer body 3, a motor is installed in the installation cavity, a driving plate 13 is fixedly connected to the bottom end of the motor output shaft passing through the bottom of the transformer body 3, a through groove 10 is provided on the inner wall of the mounting frame 1 corresponding to each first gear 8, a driving plate 9 is movably passed through the through groove 10, and the side of the driving plate 9 is fitted on the through groove On the inner groove wall of the through groove 10, the driving plate 9 extends to the bottom of the first gear 8, and the driving plate 9 is provided with teeth meshing with the first gear 8. A threaded groove is provided on the end surface of the driving plate 9 away from the first gear 8. A convex block 12 is connected to the position near each driving plate 9 below the transformer body 3. A first screw rod 11 is rotated through the convex block 12, and one end of the first screw rod 11 is rotated and inserted into the threaded groove on the driving plate 9. A bevel gear 14 is fixedly sleeved on the other end of the first screw rod 11, and teeth meshing with the bevel gear 14 are provided on the driving plate 13. When the transformer body 3 needs to be repaired, the installation cavity can be directly started. The motor drives the driving disk 13 to rotate, and drives multiple first screws 11 to rotate on the corresponding protrusions 12 through the bevel gear 14. When the first screw 11 rotates, the corresponding driving plate 9 moves on the mounting frame 1 in the direction close to the driving disk 13, and drives the rotating rod 6 to rotate through the teeth on the driving plate 9 and the first gear 8, and then the side sealing plates 4 are turned down from the side of the transformer body 3 and supported on the mounting frame 1, which can not only better expose the components inside the transformer body 3 and facilitate maintenance, but also the maintenance personnel can stand on the side sealing plates 4 to increase the range of activities of the maintenance personnel at the transformer body 3, so as to better repair the transformer body 3.

[0032] See also Figure 1-Figure 9The splicing structure includes a first receiving groove 15 provided on both sides of each side sealing plate 4, a transfer plate 16 is movably inserted into each first receiving groove 15, and a side of the transfer plate 16 away from the side sealing plate 4 is an inclined surface, and the transfer plate 16 is inserted into a hole at a side near the rear end position in the first receiving groove 15, and a guide rod 22 is movably inserted therein, and one end of the guide rod 22 is connected to the inner groove wall of the first receiving groove 15. After the side sealing plate 4 is supported on the mounting frame 1, the transfer plate 16 can be pulled out from the first receiving groove 15 on the side sealing plate 4, and the two adjacent transfer plates 16 can be moved out and spliced ​​together, so that the maintenance personnel can remove the spliced ​​transfer plates 16 from the spliced ​​transfer plates 16. On the top, from one of the side sealing plates 4, move to another adjacent side sealing plate 4, and then according to the needs of the actual maintenance work, the transformer body 3 is inspected at various positions; the protective structure includes a groove 17 opened in the middle of the side sealing plate 4, and the inner groove wall of the groove 17 is rotatably connected to the end of the transformer body 3, and a flip plate 18 is fixedly sleeved on the flip rod, and a protective horizontal plate 19 is connected to the top of the flip plate 18, and protective vertical plates 20 are connected to the positions near the two ends of the protective horizontal plate 19. A second receiving groove 21 is opened on the top of the side sealing plate 4. After the side sealing plate 4 is rotated down and supported on the mounting frame 1, it can be removed from the groove 17 is axially rotated on the side sealing plate 4 to turn the flip plate 18 to bring out the protective horizontal plate 19 and the protective vertical plate 20 in the second storage groove 21. On the side sealing plate 4, the protective horizontal plate 19 and the protective vertical plate 20 are used to play a role of safety protection and improve the safety of maintenance work; an electric telescopic rod 23 is installed on the groove wall at the other end of the groove 17, and a push-pull plate 26 is connected to one end of the output shaft of the electric telescopic rod 23. A movable plate 24 is connected to the top of the push-pull plate 26. Guide grooves 27 for the movable plate 24 to be inserted into the groove walls on both sides of the groove 17 are provided, and the side of the movable plate 24 is attached to the groove wall of the guide groove 27. The movable plate A curved rod 25 is rotatably connected to the top of the curved rod 25, and the top of the curved rod 25 is rotatably connected to the flip plate 18. A transmission structure is provided between the movable plate 24 and the corresponding two transfer plates 16. When the electric telescopic rod 23 is started, the movable plate 24 is driven to move toward the side away from the transformer body 3 through the push-pull plate 26, and the protective horizontal plate 19 and the protective vertical plate 20 can be automatically pushed out from the second storage groove 21 through the curved rod 25, and the operation is more labor-saving and convenient. When the electric telescopic rod 23 drives the movable plate 24 to move toward the side close to the transformer body 3, the protective horizontal plate 19 and the protective vertical plate 20 can be automatically pulled into the second storage groove 21 for storage;

[0033] The transmission structure includes an intermediate rod 29 that rotates through the groove walls on both sides of the groove 17 near the middle position. The intermediate rod 29 is located at a lower position of the movable plate 24. A second gear 30 is fixedly sleeved on the intermediate rod 29. The movable plate 24 is provided with teeth meshing with the second gear 30 on the lower side. The intermediate rod 29 is inserted into the two first receiving grooves 15 and is connected to the second screw rod 28 at both ends. The threads on each group of two second screw rods 28 are in opposite directions. One end of the second screw rod 28 is rotated and inserted into the thread groove provided on the transfer plate 16. When the electric telescopic rod 23 drives the movable plate 24 to move toward the side away from the transformer body 3, the teeth under the movable plate 24 and the first gear 8 can drive the intermediate rod 29 and the second screw rod 28 to rotate as a whole. Since the threads on each group of two second screw rods 28 are in opposite directions, the two transfer plates 16 of each group can be automatically moved out of the first receiving groove 15, which is convenient for the maintenance personnel to move and inspect.

[0034] See also Figure 1-Figure 3 The climbing structure includes two groups of second fixing blocks 31 connected at both ends below the mounting frame 1, the two second fixing blocks 31 on the left side are rotatably passed through the rotating shaft 33, and the fixing plate 32 is connected between the two second fixing blocks 31 on the right side, and a ladder 36 is fixedly sleeved on the rotating shaft 33, and a third screw rod 35 is rotatably passed through the threaded groove at one end away from the rotating shaft 33 below the ladder 36, and a handle 34 is installed on the bottom end of the third screw rod 35, and the top end of the third screw rod 35 is rotatably inserted into the threaded groove provided on the fixing plate 32, and the third screw rod 35 is rotated by the handle 34. When the top end of the third screw rod 35 is rotated out of the threaded groove on the fixing plate 32, the ladder 36 on the mounting frame 1 can be pulled down, and the end of the ladder 36 away from the rotating shaft 33 can be supported to the ground, which is convenient for maintenance personnel to climb from the ladder 36 to the mounting frame 1 and perform maintenance work on the transformer body 3;

[0035] The fastening structure includes a first fastening frame 37 fixedly connected to both ends of the mounting frame 1, and the two first fastening frames 37 are symmetrically arranged with each other. A second fastening frame 38 is hinged at a position close to each first fastening frame 37 on the mounting frame 1. The first fastening frame 37 and the second fastening frame 38 are tightly sleeved on the electric pole 2, and the first fastening frame 37 and the second fastening frame 38 are fixed by bolts. The first fastening frame 37 and the second fastening frame 38 are both provided with bolts fastened to the electric pole 2. Through the first fastening frame 37 and the second fastening frame 38, the mounting frame 1 equipped with the transformer main body 3 can be fixedly installed on the electric pole 2.

[0036] The implementation principle of an oil-immersed iron core transformer of the embodiment of the present invention is as follows: when a transformer body 3 on the mounting frame 1 of a utility pole 2 fails and needs to be repaired, the maintenance personnel first rotate the top end of the third screw 35 out of the threaded groove on the fixing plate 32 through the handle 34, and then rotate the ladder 36 on the mounting frame 1 with the rotating shaft 33 as the axis, and rotate the end of the ladder 36 away from the rotating shaft 33 to support it on the ground, and then the maintenance personnel climb up the ladder 36 to the mounting frame 1, and then start the motor in the transformer body 3, driving the driving The disk 13 rotates, and the bevel gear 14 is used to simultaneously drive the multiple first screws 11 to rotate on the corresponding protrusions 12, so that the multiple driving plates 9 move on the mounting frame 1 in the direction close to the driving disk 13, and the teeth on the driving plate 9 and the first gear 8 are used to drive the rotating rod 6 to rotate on the first fixed block 5, thereby simultaneously opening the multiple side sealing plates 4 on the side of the transformer body 3. After the side sealing plates 4 are supported on the mounting frame 1, the maintenance personnel can move from the mounting frame 1 to the side sealing plates 4, thereby increasing the movable space of the maintenance personnel at the transformer body 3. The electric telescopic rod 23 in the groove 17 can be started to drive the moving plate 24 on the push-pull plate 26 to move in the guide groove 27 toward the side away from the transformer body 3, and the flip plate 18, the protective horizontal plate 19 and the protective vertical plate 20 are pushed out from the groove 17 and the second storage groove 21 through the curved rod 25. The flip plate 18, the protective horizontal plate 19 and the protective vertical plate 20 are used as a whole on the side sealing plate 4 to provide safety protection for the maintenance personnel, and the moving plate 24 is moved by the moving plate 24. The teeth under the plate 24 and the second gear 30 drive the intermediate rod 29 to rotate, and then drive the second screw rod 28 to rotate, so that the transfer plate 16 is moved out of the first receiving groove 15, and the two adjacent transfer plates 16 are moved and spliced ​​together. Through the transfer plate 16, it is convenient for maintenance personnel to move from one side sealing plate 4 to another adjacent side sealing plate 4, and then according to the work needs of the maintenance workers, the maintenance personnel can move to various positions of the transformer body 3 for maintenance work, which reduces the difficulty of the maintenance personnel's work and improves the efficiency of maintenance work.

[0037] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An oil-immersed iron core transformer, comprising a mounting frame (1) and a transformer body (3), characterized in that: A transformer body (3) is fixedly mounted in the middle of the upper portion of the mounting frame (1); both ends of the mounting frame (1) are fastened to two electric poles (2) via a fastening structure; side sealing plates (4) are mounted on the sides of the transformer body (3) via a rotating structure; a climbing structure is provided at the lower portion of the mounting frame (1); and a protective structure is provided at the upper portion of each side sealing plate (4); The rotating structure comprises a first fixed block (5) connected to the lower side of each transformer body (3) near two corners, a rotating rod (6) is rotatably passed through the two first fixed blocks (5) of each group, a side sealing plate (4) is fixedly sleeved on the rotating rod (6), each side sealing plate (4) is provided with a splicing structure, an opening (7) is provided in the middle of a side of the transformer body (3) near the side, a first gear (8) is fixedly sleeved on the rotating rod (6) at the position of the opening (7), and an automatic retractable structure is provided between the transformer body (3) and the side sealing plate (4); The automatic retractable structure comprises an installation cavity provided in the lower inner wall of the transformer body (3), a motor being installed in the installation cavity, a driving plate (13) being fixedly connected to the bottom end of the motor output shaft passing through the lower side of the transformer body (3), a through slot (10) being provided on the inner wall of the installation frame (1) at a position corresponding to each first gear (8), a driving plate (9) movably passing through the through slot (10), a side surface of the driving plate (9) being attached to the inner slot wall of the through slot (10), the driving plate (9) extending to the lower side of the first gear (8), the driving plate (9) The drive plate (9) is provided with teeth meshing with the first gear (8), a thread groove is provided on the end surface of the drive plate (9) away from the first gear (8), and a projection (12) is connected to the position near each drive plate (9) below the transformer body (3), a first screw rod (11) is rotatably passed through the projection (12), one end of the first screw rod (11) is rotatably inserted into the thread groove on the drive plate (9), and a bevel gear (14) is fixedly sleeved on the other end of the first screw rod (11), and the drive plate (13) is provided with teeth meshing with the bevel gear (14).

2. The oil-immersed iron core transformer according to claim 1, characterized in that: The splicing structure comprises a first receiving groove (15) provided on both sides of each side sealing plate (4), a transfer plate (16) being movably inserted into each of the first receiving grooves (15), a side of the transfer plate (16) away from the side sealing plate (4) being an inclined surface, the transfer plate (16) being inserted into a plug hole at a side surface close to a rear end position in the first receiving groove (15), a guide rod (22) being movably inserted therein, one end of the guide rod (22) being connected to an inner groove wall of the first receiving groove (15).

3. The oil-immersed iron core transformer according to claim 1, characterized in that: The protective structure comprises a groove (17) provided in the middle of the upper side sealing plate (4); a turning rod is rotatably connected to an end of the inner groove wall of the groove (17) away from the transformer body (3); a turning plate (18) is fixedly sleeved on the turning rod; a protective horizontal plate (19) is connected to the top of the turning plate (18); protective vertical plates (20) are connected to the lower side sealing plate (19) at positions near both ends; and a second receiving groove (21) is provided on the upper side of the side sealing plate (4).

4. The oil-immersed iron core transformer according to claim 3, characterized in that: An electric telescopic rod (23) is installed on the groove wall at the other end of the groove (17); a push-pull plate (26) is connected to one end of the output shaft of the electric telescopic rod (23); a moving plate (24) is connected to the top of the push-pull plate (26); guide grooves (27) for the moving plate (24) to be inserted are provided on the groove walls on both sides of the groove (17); the side surfaces of the moving plate (24) are attached to the groove walls of the guide grooves (27); a curved rod (25) is rotatably connected to the top of the moving plate (24); the top of the curved rod (25) is rotatably connected to the flip plate (18); and a transmission structure is provided between the moving plate (24) and the corresponding two transfer plates (16).

5. The oil-immersed iron core transformer according to claim 4, characterized in that: The transmission structure comprises an intermediate rod (29) which rotates through the groove walls on both sides of the groove (17) near the middle position, the intermediate rod (29) is located below the movable plate (24), a second gear (30) is fixedly sleeved on the intermediate rod (29), and teeth meshingly connected with the second gear (30) are provided on the lower surface of the movable plate (24), and the intermediate rod (29) is inserted into the two first receiving grooves (15) at both ends thereof and connected to the second screw rods (28), the threads on each group of two second screw rods (28) are in opposite directions, and one end of the second screw rod (28) is rotated and inserted into a thread groove provided on the transfer plate (16).

6. The oil-immersed iron core transformer according to claim 1, characterized in that: The climbing structure comprises two groups of second fixing blocks (31) connected at both ends below the mounting frame (1); a rotating shaft (33) is rotatably passed through the two second fixing blocks (31) on the left side; a fixing plate (32) is connected between the two second fixing blocks (31) on the right side; a ladder (36) is fixedly sleeved on the rotating shaft (33); a third screw rod (35) is rotatably passed through a thread groove at one end of the ladder (36) away from the rotating shaft (33); a handle (34) is mounted on the bottom end of the third screw rod (35); and the top end of the third screw rod (35) is rotatably inserted into a thread groove provided on the fixing plate (32).

7. The oil-immersed iron core transformer according to claim 1, characterized in that: The fastening structure comprises a first fastening frame (37) fixedly connected to both ends of the mounting frame (1), the two first fastening frames (37) being arranged symmetrically with each other, a second fastening frame (38) being hingedly connected to the mounting frame (1) at a position close to each first fastening frame (37), the first fastening frame (37) and the second fastening frame (38) being tightly sleeved on the electric pole (2), the first fastening frame (37) and the second fastening frame (38) being fixed by bolts, and the first fastening frame (37) and the second fastening frame (38) being provided with bolts fastened to the electric pole (2).

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