Transformer bushing winding device

Abstract

The transformer bushing winding device comprises a resin soaking box and bubble forcing mechanisms, epoxy resin is contained in the resin soaking box, the bubble forcing mechanisms are symmetrically arranged on the two sides of the resin soaking box through supports, and a resin extrusion assembly is arranged at the end of the resin soaking box. The resin extrusion assembly can extrude redundant epoxy resin, glass fibers are heated through the bubble forcing mechanism, gas in gaps of the glass fibers is forced to escape at high temperature, and the risk that bubbles appear in the winding process of the transformer bushing is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of transformers, and in particular relates to a transformer bushing winding device. Background Art

[0002] The transformer bushing is an insulating bushing that leads the high and low voltage leads inside the transformer to the outside of the oil tank. It not only insulates the leads from the ground, but also has the function of fixing the leads. The transformer bushing is one of the current-carrying components of the transformer. During the operation of the transformer, the load current passes through it for a long time. When a short circuit occurs outside the transformer, it is used to pass the short-circuit current. Therefore, the bushing needs to have excellent mechanical properties, electrical properties, sealing, thermal stability and insulation properties.

[0003] Common transformer bushings include FRP dry bushings, whose main insulation part is made of FRP fiber impregnated with epoxy resin and then rolled around an aluminum rod. In order to make the performance of the transformer bushing more reliable, when winding the FRP fiber, the resin needs to be completely impregnated with the glass fiber to improve the adhesion of the glass fiber.

[0004] When soaking in resin, it is necessary to ensure that the glass fiber is completely soaked, but not too much resin liquid is carried. When there is too much resin liquid, it will not only pollute the environment of the winding operation, but also affect the subsequent cooling and shaping of the bushing. At the same time, during the winding process, when there is too much resin liquid, air will be wound into the layer gap of the glass fiber and form bubbles surrounded by the resin. When the bushing is cooled and shaped, the bubbles will cause the insulation detection to fail, causing the transformer bushing to be directly scrapped. The bubbles formed during the winding process pose a high safety hazard and also increase the manufacturing cost. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a transformer bushing winding device, which at least partially solves the above problems.

[0006] The technical solution adopted by the present invention is as follows: A transformer bushing winding device proposed in the present invention includes a resin impregnation box and a bubble-forcing mechanism. Epoxy resin is contained in the resin impregnation box. After the glass fiber passes through the resin impregnation box, it will be fully soaked in the epoxy resin. The bottom of the resin impregnation box is reciprocated by a reciprocating screw to facilitate subsequent winding operations. The glass fiber is provided with raw materials by an external feeding belt. The bubble-forcing mechanism is symmetrically arranged on both sides of the resin impregnation box through a bracket. The angle of the bracket can be adjusted. In the process of winding the glass fiber, the bubble-forcing mechanism follows the path of the resin impregnation box and heats each layer of epoxy resin just wound, forcing the bubbles in the epoxy resin to escape. This device needs to be used in conjunction with a machine tool. The aluminum rod is fixed on the machine tool and rotated. During the rotation, the glass fiber impregnated with resin is wound around the aluminum rod, thereby completing the winding of the main insulating part of the transformer bushing.

[0007] Furthermore, the bubble forced out mechanism comprises a crossbeam, a telescopic frame and an electromagnetic heating arc plate, wherein the crossbeam is arranged at the lower end of the bracket, the telescopic frame is slidably arranged in the crossbeam through a spring, and the electromagnetic heating arc plate is arranged at the bottom end of the telescopic frame; Furthermore, in order to improve the baking efficiency, the telescopic frames are arranged in pairs so as to heat the glass fiber outside the transformer bushing from both sides, thereby preventing the problem of poor baking effect caused by fast winding speed; Furthermore, in order to bring the electromagnetic heating arc plate closer to the glass fiber and improve the baking effect, fixed-distance rollers are symmetrically hinged on both sides of the bottom end of the telescopic frame, and the fixed-distance rollers protrude from the surface of the electromagnetic heating arc plate.

[0008] Furthermore, in order to fully saturate the glass fiber with epoxy resin, a roller assembly capable of winding the glass fiber into a continuous Z-shape is provided in the resin saturation box. The wavelength of the wave crest of the glass fiber winding is determined by the number of rollers provided in the roller assembly. The smaller the wavelength of the wave crest, the longer the path of the glass fiber traveling in the resin saturation box, and the easier it is to saturate the epoxy resin. Furthermore, the roller assembly includes a guide wheel one, a guide wheel two, a changing wheel and a guide wheel three. The guide wheel one is arranged in an array at both ends of the resin impregnation box, and the number of the guide wheels one is adapted to the number of strands of the wound glass fiber. The guide wheels two are arranged in an array on the side walls at the front and rear ends of the resin impregnation box, and the number of the guide wheels two is the same as the number of strands of the wound glass fiber. The changing wheels are arranged in an array below the guide wheel two, and the changing wheels are staggered in layers in a step-like manner with increasing relative heights. The changing wheels can convert the glass fiber from vertical transportation to horizontal transportation, and make each strand of the glass fiber staggered up and down, thereby preventing interference between the glass fibers when soaked in resin solution. The guide wheels three arranged in an upper and lower array are arranged in groups on the left and right side walls of the resin impregnation box, and the number of guide wheels three in each group is the same as the number of changing wheels. The guide wheels three on the left and right sides are staggered in the horizontal direction to form a wave crest shape.

[0009] Furthermore, in order to prevent the impregnated glass fiber from carrying too much resin liquid, affecting the subsequent cooling and shaping of the sleeve or increasing the risk of bubble abnormality, a resin extrusion component is provided at the end of the resin impregnation box, which can properly extrude the glass fiber and squeeze out the epoxy resin in the glass fiber, so that the glass fiber can be completely impregnated with the resin, thereby improving the adhesion strength of the subsequent glass fiber winding, and no excessive abnormality occurs; Furthermore, the resin extrusion assembly includes a frame arranged on the resin impregnation box, the bottom of the frame is rotatably provided with lower extrusion wheels distributed in an array, and an upper extrusion wheel is rotatably provided above the lower extrusion wheel, and the cooperation of the lower extrusion wheel and the upper extrusion wheel can apply pressure to the glass fiber, thereby discharging excess epoxy resin liquid in the glass fiber; Furthermore, a floating plate is slidably provided in the frame, an array of fixed columns are fixedly provided in the floating plate, a sliding sleeve is slidably provided on the fixed column, the upper extrusion wheel is rotatably provided at the bottom of the sliding sleeve, a spring three is connected between the fixed column and the sliding sleeve, and the upper extrusion wheel always moves downward under the action of the spring three, thereby adjusting the gap between the upper extrusion wheel and the lower extrusion wheel; Furthermore, in order to actively adjust the extrusion pressure on the glass fiber without hindering the feeding of the glass fiber, a guide column passing through the upper end of the frame is fixed on the floating plate, and a spring 2 is connected between the guide column and the frame. The spring 2 always pulls the floating plate upward. In order to adjust the height of the floating plate and thereby adjust the compression amount of the spring 3, a pressure-adjusting bolt passing through the upper wall of the frame is rotated on the upper wall of the floating plate.

[0010] Furthermore, in order to make the epoxy resin more fluid and prevent the precipitation of the curing agent from causing the resin to delaminate, which affects the adhesion effect of the glass fiber after winding, an array of oscillating rods are arranged to rotate in the resin impregnation box, and a motor is arranged on the outer wall of the resin impregnation box, and the output shaft of the motor is connected to the oscillating rod through a synchronous sprocket; Furthermore, a heating plate is provided at the bottom of the resin impregnation box, which can heat the epoxy resin in the resin impregnation box to control the temperature of the epoxy resin and prevent the epoxy resin from being solidified due to too high a temperature or from having insufficient molecular activity due to too low a temperature.

[0011] The beneficial effects achieved by the present invention using the above structure are as follows: 1. The bubble-forcing mechanism can follow the winding path of the glass fiber. When winding each layer of glass fiber, the glass fiber is heated, forcing the gas in the gap of the glass fiber to escape at high temperature, reducing the risk of bubbles in the transformer bushing winding process; 2. The resin impregnation box can place the glass fiber horizontally to allow it to be fully impregnated with epoxy resin, and then squeeze out the excess epoxy resin through the resin extrusion component, thereby achieving the effect of impregnation with epoxy resin without carrying too much resin liquid, reducing the risk of abnormal bubbles and facilitating subsequent cooling and shaping. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of an embodiment of the present invention; Figure 2 It is a partial cross-sectional view of the bubble forced out mechanism; Figure 3 This is the working state diagram of the resin impregnation box; Figure 4 for Figure 3 A top view of Figure 5 is a cross-sectional view of a resin impregnation box; Figure 6 is a schematic diagram of the structure of a resin extrusion assembly; Figure 7 A cross-sectional view of a resin extrusion assembly.

[0013] Among them, 1. resin impregnation box, 2. bracket, 3. bubble forced out mechanism, 4. resin extrusion assembly, 5. crossbeam, 6. telescopic frame, 7. spring one, 8. electromagnetic heating arc plate, 9. fixed distance roller, 10. motor, 11. synchronous sprocket, 12. oscillation rod, 13. guide wheel one, 14. guide wheel two, 15. change wheel, 16. guide wheel three, 17. heating plate, 18. frame, 19. lower extrusion wheel, 20. floating plate, 21. guide column, 22. spring two, 23. pressure regulating bolt, 24. fixed column, 25. sliding sleeve, 26. spring three, 27. upper extrusion wheel, 28. reciprocating screw.

[0014] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0016] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0017] like Figure 1As shown, a transformer bushing winding device proposed by the present invention includes a resin impregnation box 1 and a bubble-forcing mechanism 3. Epoxy resin is contained in the resin impregnation box 1. After the glass fiber passes through the resin impregnation box 1, it will be fully soaked in the epoxy resin. The bottom of the resin impregnation box 1 is reciprocated by a reciprocating screw 28 to facilitate subsequent winding operations. The glass fiber is provided with raw materials by an external feeding belt. The bubble-forcing mechanism 3 is symmetrically arranged on both sides of the resin impregnation box 1 through a bracket 2. The angle of the bracket 2 can be adjusted. In the process of winding the glass fiber, the bubble-forcing mechanism 3 follows the path of the resin impregnation box 1 and heats each layer of epoxy resin just wound to force the bubbles in the epoxy resin to escape. The device needs to be used in conjunction with a machine tool (not shown in the accompanying drawings). The aluminum rod is fixed on the machine tool and rotated. During the rotation, the glass fiber impregnated with resin is wound around the aluminum rod, thereby completing the winding of the main insulating part of the transformer bushing.

[0018] like Figure 2 As shown, the bubble forced out mechanism 3 includes a crossbeam 5, a telescopic frame 6 and an electromagnetic heating arc plate 8. The crossbeam 5 is arranged at the lower end of the bracket 2. The telescopic frame 6 is slidably arranged in the crossbeam 5 through a spring 7. The electromagnetic heating arc plate 8 is arranged at the bottom end of the telescopic frame 6. The electromagnetic heating arc plate 8 can generate high heat. In the process of winding the glass fiber, each time a layer of glass fiber is wound, the electromagnetic heating arc plate 8 will bake and heat the glass fiber just wound, forcing the bubbles in the glass fiber and the resin to escape from the gaps in the glass fiber, thereby reducing the scrap rate of the transformer bushing.

[0019] In order to improve the baking efficiency, the telescopic frames 6 are arranged in pairs so as to heat the glass fibers outside the transformer bushing from both sides to prevent the problem of poor baking effect caused by a fast winding speed.

[0020] In order to make the electromagnetic heating arc plate 8 close to the glass fiber and improve the baking effect, fixed-distance rollers 9 are symmetrically hinged on both sides of the bottom end of the telescopic frame 6. The fixed-distance rollers 9 protrude from the surface of the electromagnetic heating arc plate 8. When the fixed-distance rollers 9 roll in contact with the glass fiber layer, the electromagnetic heating arc plate 8 will be close to the glass fiber without contacting the glass fiber, thereby achieving the effect of baking the glass fiber layer at a close distance. The fixed-distance rollers 9 cooperate with the spring 7 to be unaffected by the change of the radius size during the winding process, so that the electromagnetic heating arc plate 8 is always close to the glass fiber.

[0021] like Figure 3 As shown, in order to allow the glass fiber to be fully impregnated with epoxy resin, a roller assembly capable of winding the glass fiber into a continuous Z-shape is provided in the resin impregnation box 1. The wavelength of the glass fiber winding wave peak is determined by the number of rollers provided in the roller assembly. The smaller the wavelength of the wave peak, the longer the path that the glass fiber travels in the resin impregnation box 1, and the easier it is to be impregnated with epoxy resin.

[0022] like Figure 5As shown, the roller assembly includes a guide wheel 13, a guide wheel 2 14, a change-direction wheel 15 and a guide wheel 3 16. The guide wheel 13 is arranged in an array at both ends of the resin impregnation box 1, and the number of the guide wheels 13 is adapted to the number of strands of the wound glass fiber. The guide wheel 2 14 is arranged in an array on the side walls at the front and rear ends of the resin impregnation box 1, and the number of the guide wheels 2 14 is the same as the number of strands of the wound glass fiber. The change-direction wheel 15 is arranged in an array below the guide wheel 2 14, and the change-direction wheel 15 is staggered in layers in a step-like manner with increasing relative heights. The change-direction wheel 15 can convert the glass fiber from vertical transportation to horizontal transportation, and make each strand of glass fiber staggered up and down, thereby preventing the glass fiber from interfering when soaking in the resin solution. The guide wheels 3 16 arranged in an array up and down are arranged in multiple groups on the left and right side walls of the resin impregnation box 1, and the number of each group of guide wheels 3 16 is the same as the number of the change-direction wheel 15. Figure 4 As shown, the guide wheels 16 on the left and right sides are staggered in the horizontal direction to form a wave crest shape. Under the action of the various components in the roller assembly, the glass fiber can be transformed from a vertical state to a horizontal wave crest state, so that the glass fiber is completely impregnated in the resin impregnation box 1, and the impregnation path of the glass fiber is increased, thereby improving the impregnation effect of the glass fiber and the epoxy resin.

[0023] like Figure 3 As shown, in order to prevent the impregnated glass fiber from carrying too much resin liquid, affecting the cooling and shaping of the subsequent sleeve or increasing the risk of bubble abnormalities, a resin extrusion component 4 is provided at the end of the resin impregnation box 1. The resin extrusion component 4 can properly extrude the glass fiber and squeeze out the epoxy resin in the glass fiber, so that the glass fiber can be completely impregnated with the resin, thereby improving the adhesion strength of the subsequent glass fiber winding without causing excessive abnormalities.

[0024] like Figure 6 and Figure 7 As shown, the resin extrusion assembly 4 includes a frame 18 arranged on the resin impregnation box 1, and an array of lower extrusion wheels 19 are rotatably provided at the bottom of the frame 18, and an upper extrusion wheel 27 is rotatably provided above the lower extrusion wheel 19. Through the cooperation of the lower extrusion wheel 19 and the upper extrusion wheel 27, pressure can be applied to the glass fiber, thereby expelling excess epoxy resin liquid in the glass fiber.

[0025] A floating plate 20 is slidably provided in the frame 18, and an array of fixed columns 24 are fixedly provided in the floating plate 20. A sliding sleeve 25 is slidably provided on the fixed column 24. An upper extrusion wheel 27 is rotatably provided at the bottom of the sliding sleeve 25. A spring three 26 is connected between the fixed column 24 and the sliding sleeve 25. The upper extrusion wheel 27 always moves downward under the action of the spring three 26, so as to adjust the gap between the upper extrusion wheel 27 and the lower extrusion wheel 19. When the glass fiber passes between the upper extrusion wheel 27 and the lower extrusion wheel 19, excess liquid in the glass fiber will be squeezed out. When the extrusion force on the glass fiber is large, the compression amount of the spring three 26 is adapted to the extrusion force on the glass fiber, and the spring three 26 will be pushed upward, so as to automatically adjust the gap between the upper extrusion wheel 27 and the lower extrusion wheel 19 to prevent affecting the normal feeding of the glass fiber.

[0026] In order to actively adjust the extrusion pressure on the glass fiber without hindering the feeding of the glass fiber, a guide column 21 penetrating the upper end of the frame 18 is fixed on the floating plate 20, and a spring 22 is connected between the guide column 21 and the frame 18. The spring 22 always pulls the floating plate 20 upward. In order to adjust the height of the floating plate 20, thereby adjusting the compression amount of the spring 3 26, a pressure-adjusting bolt 23 penetrating the upper wall of the frame 18 is rotated on the upper wall of the floating plate 20. The pressure-adjusting bolt 23 is threadedly connected to the upper wall of the frame 18. When the pressure-adjusting bolt 23 rotates, the floating plate 20 can move up and down. When the floating plate 20 moves up and down, the spacing between the upper extrusion wheel 27 and the lower extrusion wheel 19 changes, and this change is transmitted to the spring 22, thereby finally changing the compression amount of the spring 22. When the compression amount of the spring 22 changes, the pressure applied to the lower part also changes, thereby adjusting the extrusion pressure on the glass fiber.

[0027] like Figure 3-Figure 5 As shown, in order to make the epoxy resin more fluid and prevent the precipitation of the curing agent from causing the resin to be stratified and affecting the adhesion effect of the glass fiber after winding, an array of oscillation rods 12 are rotated in the resin impregnation box 1, and a motor 10 is provided on the outer wall of the resin impregnation box 1. The output shaft of the motor 10 is connected to the oscillation rod 12 through a synchronous sprocket 11. When the motor 10 rotates, all the oscillation rods 12 are driven to rotate through the synchronous sprocket 11. After the oscillation rods 12 rotate, the epoxy resin at the bottom of the resin impregnation box 1 will flow, the curing agent will flow, the fluidity of the epoxy resin will be improved, and the adhesion effect between the glass fiber and the resin will be strengthened.

[0028] A heating plate 17 is provided at the bottom of the resin impregnation box 1. The heating plate 17 can heat the epoxy resin in the resin impregnation box 1 to control the temperature of the epoxy resin and prevent the epoxy resin from being solidified due to too high a temperature or from having insufficient molecular activity due to too low a temperature.

[0029] During specific operation, the prepared epoxy resin is added into the resin impregnation box 1, and the glass fiber on the feeding belt is drawn out to pass through the roller assembly, that is, through the guide wheel 1 13, the guide wheel 2 14, the change-direction wheel 15 and the guide wheel 3 16 in sequence, so that the glass fiber is horizontally distributed in multiple layers in the resin impregnation box 1, and each strand of glass fiber presents a horizontal wave crest shape, thereby increasing the path for the glass fiber to pass through the epoxy resin and promoting the glass fiber to be completely impregnated with the resin.

[0030] After the glass fiber passes through the roller assembly, the sliding sleeve 25 is pushed upward to increase the gap between the sliding sleeve 25 and the lower extrusion wheel 19, and the glass fiber passes through the gap between the lower extrusion wheel 19 and the upper extrusion wheel 27. The sliding sleeve 25 moves downward again under the action of the spring three 26, and drives the upper extrusion wheel 27 to fit with the lower extrusion wheel 19, thereby squeezing and fixing the glass fiber. Finally, the glass fiber is pulled out to a certain length and wound around the aluminum rod on the machine tool.

[0031] Then push the telescopic frame 6 to both sides so that the electromagnetic heating arc plate 8 under the telescopic frame 6 opens to the maximum distance, and then adjust the angle of the bracket 2 so that the electromagnetic heating arc plates 8 on both sides are wrapped around the aluminum rod, and then release the telescopic frame 6. The telescopic frame 6 shrinks inward under the action of the spring 1 7. When the fixed-distance roller 9 contacts the aluminum rod, the position of the telescopic frame 6 is fixed, and the electromagnetic heating arc plate 8 is close to the aluminum rod.

[0032] When all preparations are completed, the machine tool is started, and the machine tool drives the aluminum rod to rotate. After the aluminum rod rotates, it pulls the glass fiber to continuously feed toward the aluminum rod and wrap around the aluminum rod. At the same time, the heating plate 17 under the resin impregnation box 1 works, and heats and keeps the epoxy resin in the resin impregnation box 1 warm, so that its activity is kept in the best state. The motor 10 on the side wall of the resin impregnation box 1 is also started, and the motor 10 drives the oscillation rod 12 to rotate through the synchronous sprocket 11, so that the epoxy resin in the resin impregnation box 1 flows, preventing the precipitation of the curing agent and affecting the performance of the epoxy resin.

[0033] During the continuous feeding of glass fiber, the glass fiber first contacts the epoxy resin in the resin impregnation box 1, moves along the limited path of the roller assembly and forms a wave-shaped motion trajectory, so as to be fully impregnated with the resin. The glass fiber impregnated with the resin passes through the upper extrusion wheel 27 and the lower extrusion wheel 19, and under the action of the spring three 26, the excess resin in the glass fiber is squeezed out to prevent the appearance of excessive resin during the winding process, which affects the subsequent cooling and shaping or the risk of bubbles.

[0034] If the glass fiber still does not meet the production requirements after squeezing the resin liquid, and the resin content is too high or too low, the pressure regulating bolt 23 can be rotated to move the floating plate 20 up and down, thereby changing the compression amount of the spring three 26 when the upper extrusion wheel 27 contacts the lower extrusion wheel 19, and finally changing the extrusion force on the glass fiber, thereby adjusting the extrusion amount of the resin.

[0035] After the glass fiber is impregnated and extruded, the resin impregnation box 1 also synchronously follows the reciprocating screw 28 to reciprocate, thereby winding the glass fiber onto the aluminum rod layer by layer. As the number of glass fiber winding layers increases, the circular radius size formed by the glass fiber wrapping the aluminum rod is also continuously changing, and the fixed-distance roller 9 will also contact the outermost layer of glass fiber and drive the telescopic frame 6 to slide, so that the electromagnetic heating arc plate 8 is always close to the outermost layer of glass fiber, so that the electromagnetic heating arc plate 8 can heat each layer of glass fiber that has just been wound, so that the internal bubbles can escape and the product yield can be improved.

[0036] After the winding is completed, the telescopic frames 6 are moved on both sides of the box and the brackets 2 are rotated in the opposite direction to separate the electromagnetic heating arc plate 8 from the wound aluminum rod, and the next aluminum rod can be installed to continue the winding operation.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0038] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

[0039] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A transformer bushing winding device, characterized in that: include: A resin impregnation box (1) for impregnating glass fibers, wherein the resin impregnation box (1) is provided with a roller assembly capable of winding the glass fibers into a continuous Z-shape; The bubble-forcing mechanism (3) is symmetrically arranged on both sides of the resin impregnation box (1) through a bracket (2), and the bubble-forcing mechanism (3) comprises a crossbeam (5), a telescopic frame (6) and an electromagnetic heating arc plate (8), wherein the crossbeam (5) is arranged at the lower end of the bracket (2), the telescopic frame (6) is slidably arranged at both ends of the crossbeam (5) through a spring (7), and the electromagnetic heating arc plate (8) is arranged at the bottom end of the telescopic frame (6); The resin extrusion assembly (4) comprises a frame (18) arranged on the resin impregnation box (1), wherein the bottom of the frame (18) is rotatably provided with lower extrusion wheels (19) distributed in an array, and an upper extrusion wheel (27) is rotatably provided above the lower extrusion wheels (19).

2. The transformer bushing winding device according to claim 1, characterized in that: The bottom ends of the telescopic frame (6) are symmetrically hinged with fixed-distance rollers (9) on both sides, and the fixed-distance rollers (9) protrude from the surface of the electromagnetic heating arc plate (8).

3. The transformer bushing winding device according to claim 1, characterized in that: The roller assembly comprises a guide wheel 1 (13), a guide wheel 2 (14), a direction-changing wheel (15) and a guide wheel 3 (16); the guide wheel 1 (13) is arranged in an array at both ends of the resin impregnation box (1); the guide wheel 2 (14) is arranged in an array on the side walls at the front and rear ends of the resin impregnation box (1); the direction-changing wheel (15) is arranged in an array below the guide wheel 2 (14); and the guide wheel 3 (16) arranged in an upper and lower array is arranged in a plurality of groups on the left and right side walls of the resin impregnation box (1).

4. The transformer bushing winding device according to claim 3, characterized in that: The direction-changing wheels (15) are staggeredly distributed in a stair-like manner with relative heights increasing successively.

5. The transformer bushing winding device according to claim 3, characterized in that: The guide wheels 3 (16) on the left and right sides are arranged in a staggered manner in a wave crest shape in the horizontal direction.

6. The transformer bushing winding device according to claim 1, characterized in that: A floating plate (20) is slidably disposed in the frame (18), an array of fixed columns (24) are fixedly disposed in the floating plate (20), a sliding sleeve (25) is slidably disposed on the fixed columns (24), the upper extrusion wheel (27) is rotatably disposed at the bottom of the sliding sleeve (25), and a spring three (26) is connected between the fixed column (24) and the sliding sleeve (25).

7. The transformer bushing winding device according to claim 6, characterized in that: A guide column (21) penetrating the upper end of the frame (18) is fixed on the floating plate (20), and a second spring (22) is connected between the guide column (21) and the frame (18).

8. The transformer bushing winding device according to claim 7, characterized in that: The upper wall of the floating plate (20) is rotatably provided with a pressure regulating bolt (23) penetrating the upper wall of the frame (18), and the pressure regulating bolt (23) is threadedly connected to the upper wall of the frame (18).

9. The transformer bushing winding device according to claim 1, characterized in that: The resin impregnation box (1) is provided with oscillating rods (12) distributed in an array for rotation, and an outer wall of the resin impregnation box (1) is provided with a motor (10), and an output shaft of the motor (10) is connected to the oscillating rods (12) via a synchronous sprocket (11).

10. The transformer bushing winding device according to claim 1, characterized in that: A heating plate (17) is provided at the bottom of the resin impregnation box (1).

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