A transformer high-voltage coil winding positioning tool

Abstract

This invention discloses a positioning fixture for winding high-voltage coils of a transformer, including a base platform. A side support platform is fixedly installed on the right side of the top of the base platform via a fixing plate. A motor is fixedly installed on the right side of the base platform via a bracket. A rotating rod is fixedly installed on the output shaft of the motor via a coupling. This invention relates to the field of high-voltage coil winding technology. This transformer high-voltage coil winding positioning fixture allows adjustment of the first threaded rotating rod via a ring handle, driving the second roller closer to the first roller. The clamping gap can be flexibly adjusted according to the cable diameter. The outer rubber sleeve of the double rollers provides anti-slip cushioning, automatically straightening the cable without requiring continuous manual pulling, reducing labor intensity, and preventing the metal rollers from scratching the cable insulation. After being limited by the lead-in cylinder, the cable moves back and forth at a uniform speed with the cable laying mechanism. The cable remains taut and neatly arranged throughout the process, with consistent tension between coil layers, effectively improving the quality of the finished high-voltage coil and the efficiency of mass production.

Description

Technical Field

[0001] This invention relates to the field of high-voltage coil winding technology, specifically to a positioning tool for winding high-voltage coils of transformers. Background Technology

[0002] The high-voltage coil of a transformer is the core insulation and conductive component of a power transformer. Its winding process directly determines the transformer's insulation strength, short-circuit withstand capability, no-load loss, and overall operational stability. The high-voltage coil is tightly wound in layers and sections using thick-diameter insulated cables. The winding process imposes stringent requirements on cable tension uniformity, wire alignment, drum positioning firmness, and cable straightness. Currently, traditional coil winding fixtures in the industry exhibit multiple structural defects in actual production applications, such as: 1. The main shaft of existing winding equipment mostly adopts a smooth cylindrical shaft with a single-sided baffle for limiting. When installing the winding drum, it is simply fixed by the end buckle without a two-way locking and limiting structure. On the one hand, the compatibility of high-voltage coil drums with different inner diameters and widths is poor. When changing different models of winding drums, it is necessary to replace the matching positioning flange, which is cumbersome and greatly reduces the efficiency of production changeover. On the other hand, the main shaft rotates at high speed during the winding process, and the cable continuously generates axial tension. The single-sided limiting baffle is prone to loosening and displacement, and the drum will move axially. This directly causes the coil wiring to be misaligned and the gaps between layers to be uneven. In severe cases, the cable will overlap and local bulges will occur. In the later withstand voltage test, insulation breakdown and excessive partial discharge are very likely to occur.

[0003] 2. Traditional winding fixtures rely solely on a motor-driven spindle to wind the cable, lacking a synchronized reciprocating cable winding mechanism and cable clamping and straightening components. In actual operation, operators must continuously pull the cable end outwards throughout the process, relying on manual force to maintain cable sturdiness and ensure even winding. High-voltage cables have thick diameters and large total weight per roll, making prolonged manual pulling extremely labor-intensive. The manual pulling force cannot be kept constant; fluctuations can cause loosening of the inner coil layers and excessive stretching of the outer layers, resulting in inconsistent tightness between coil layers. During operation, thermal expansion can easily cause interlayer displacement and insulation paper damage. Furthermore, manually reciprocating the cable for layered winding results in inconsistent rhythm and stroke, leading to appearance and performance defects such as uneven width, localized wire accumulation, and excessive gaps after winding. This results in a low finished product yield and consumes significant manpower, hindering the automated mass production of transformer coils.

[0004] 3. Existing cable guide rollers in most tooling systems have a fixed gap structure. This makes it impossible to quickly and accurately adjust the clamping gap for high-voltage insulated cables of different diameters. Excessive gap can cause radial swaying and misalignment during cable winding, leading to cable deviation. Insufficient gap can squeeze the outer insulation layer, causing cracking and wear, and damaging the coil's insulation performance. Some simple tooling systems lack adjustable double-roller clamping components, using only a single guide tube for limiting the cable. Without cable support and constraint, the cable vibrates significantly during winding, further exacerbating the cable routing problem. Furthermore, traditional clamping rollers lack anti-slip buffer structures, with the metal roller directly contacting the insulated cable. When the cable slides under tension, it can scratch the outer insulation, creating a potential insulation failure hazard for transformer operation.

[0005] Therefore, a transformer high-voltage coil winding positioning fixture with integrated structure, synchronous transmission, adaptive adjustment, and firm positioning is designed to solve this type of defect. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a positioning fixture for winding high-voltage coils of transformers, which solves the problems of high labor intensity and unstable accuracy in manual coil winding operations.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a positioning fixture for winding a high-voltage coil of a transformer, comprising a base platform, a side support platform fixedly mounted on the right side of the top of the base platform via a fixing plate, a motor fixedly mounted on the right side of the base platform via a bracket, a rotating rod fixedly mounted on the output shaft of the motor via a coupling, the left end of the rotating rod penetrating the side support platform and extending to the left side of the side support platform, a stop plate fixedly mounted at the end of the rotating rod extending to the left side of the side support platform, a rectangular rod fixedly mounted on the left side of the stop plate, a winding drum provided on the surface of the rectangular rod, and a cable body wound on the surface of the winding drum.

[0008] Preferably, a square groove is provided at the left end of the rectangular rod, and a cross guide groove extending to the outside is provided on the inner wall of the square groove. An internally threaded cylinder is fixedly installed on the right side of the inner cavity of the square groove. A threaded insert is threadedly connected to the inner side of the internally threaded cylinder. An internally threaded cross plate is threadedly connected to the surface of the threaded insert, and the internally threaded cross plate is slidably connected to the inner side of the cross guide groove. The internally threaded cross plate is in contact with the left side of the rectangular rod.

[0009] Preferably, a second threaded rod is rotatably mounted on the right side of the inner cavity of the side support platform via a bearing component, and the left end of the second threaded rod passes through the side support platform and extends to the left side of the side support platform. The second threaded rod and the rotating rod are connected by a pulley and a belt drive. A driven rod is rotatably mounted on the left side of the side support platform via a bearing component.

[0010] Preferably, the surface of the second threaded rod is threadedly connected to a threaded sleeve, the surface of the driven rod is slidably mounted with a guide sleeve, and a lead wire cylinder is fixedly installed between the guide sleeve and the threaded sleeve. A vertical support plate is fixedly installed on the left side of the top of the base platform, and the left ends of the second threaded rod and the driven rod are both connected to one side of the vertical support plate through bearing components.

[0011] Preferably, a first roller is rotatably mounted on the left side of the side support platform through an opening, a side slide plate is fixedly mounted on the right side of the inner cavity of the side support platform through a fixing plate, a square slide block is slidably mounted on the inner side of the side slide block, a load-bearing rod is fixedly mounted on the left side of the square slide block, a first guide opening is provided on the left side of the side support platform, the left end of the load-bearing rod passes through the first guide opening and extends to the left side of the side support platform, and a second roller that cooperates with the first roller is rotatably mounted on the end of the load-bearing rod extending to the left side of the side support platform through a bearing component.

[0012] Preferably, the surfaces of the first roller and the second roller are both fitted with rubber sleeves that cooperate with each other, and one end of the cable body passes through the lead tube and the two rubber sleeves in sequence and extends to the front of the base platform.

[0013] Preferably, a threaded rotating cylinder is fixedly installed on the surface of the load-bearing rod and on the inner side of the side support platform through an opening. A first threaded rotating rod is threadedly connected to the inner side of the threaded rotating cylinder. The rear end of the first threaded rotating rod is rotatably connected to the rear part of the inner cavity of the side support platform through a bearing. The front end of the first threaded rotating rod passes through the side support platform and extends to the front part of the side support platform. A ring handle is fixedly installed at the end of the first threaded rotating rod that extends to the front part of the side support platform.

[0014] Preferably, the left side of the vertical support plate is provided with a second guide opening for use in conjunction with the first roller and the second roller.

[0015] This invention provides a positioning fixture for winding high-voltage coils of a transformer. Compared with existing technologies, it has the following advantages: (1) The high-voltage coil winding positioning fixture of this transformer uses a ring handle to adjust the first threaded rod, which drives the second roller to approach the first roller. The clamping gap can be flexibly adjusted according to the cable diameter. The outer rubber sleeve of the double rollers plays an anti-slip and buffering role, which not only clamps the cable to achieve automatic straightening without the need for continuous manual pulling, reducing labor intensity, but also avoids the metal rollers from scratching the cable insulation. After the cable is limited by the lead-in cylinder, it moves back and forth at a uniform speed with the cable laying mechanism. The cable is taut and neatly arranged throughout the process, and the tightness between coil layers is consistent, which effectively improves the quality of the high-voltage coil finished product and the efficiency of mass production.

[0016] (2) The high-voltage coil winding positioning fixture of this transformer uses a rectangular rod with a cross guide groove and a threaded locking assembly to lock the drum in both directions. It is compatible with various specifications of winding drums. No parts need to be replaced during disassembly and assembly, resulting in high production efficiency. The double limit prevents the drum from moving around or slipping, ensuring uniform coil winding and reducing the risk of poor insulation. The cross structure also prevents the drum from coming off at high speed, improving operational safety. Furthermore, it is driven by only one main motor, which synchronously drives the winding spindle and the winding threaded rod via a belt, eliminating the need for a dedicated winding motor and synchronous control components. This simplifies the equipment structure, reduces manufacturing and maintenance costs, and ensures that the winding and winding actions are synchronized, avoiding the problem of winding being ahead or behind, and reducing the frequency of downtime for debugging. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional view of the side support structure of the present invention; Figure 3 This is a schematic diagram of the annular handle, the first guide port, and the second guide port structure of the present invention; Figure 4 This is a cross-sectional view of the rectangular rod structure of the present invention; Figure 5 For the present invention Figure 4 A magnified view of a section at point A in the middle; Figure 6 This is a schematic diagram of the load-bearing rod, the second roller, and the rubber sleeve structure of the present invention; Figure 7 This is a schematic diagram of the threaded sleeve, guide sleeve, and lead tube structure of the present invention.

[0018] In the diagram: 1. Base platform; 2. Side support platform; 3. Rotating rod; 4. Stop plate; 5. Rectangular rod; 6. Winding drum; 7. Square slot; 8. Cross guide slot; 9. Internal threaded cylinder; 10. Threaded insert rod; 11. Internal threaded cross plate; 12. First threaded rotating rod; 13. Second threaded rotating rod; 14. Driven rod; 15. Pulley; 16. Belt; 17. Threaded sleeve; 18. Guide sleeve; 19. Lead wire cylinder; 20. Vertical support plate; 21. First roller; 22. Side slide plate; 23. Square slide block; 24. Load-bearing rod; 25. Second roller; 26. Rubber sleeve; 27. Threaded rotating cylinder; 28. Ring handle; 29. ​​First guide port; 30. Second guide port; 31. Cable body; 32. Motor. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-7 The present invention provides a technical solution: a positioning fixture for winding a transformer high-voltage coil, including a base platform 1, a side support platform 2 fixedly installed on the right side of the top of the base platform 1 by a fixing plate, a motor 32 fixedly installed on the right side of the base platform 1 by a bracket, the motor 32 being a servo motor, a rotating rod 3 fixedly installed on the output shaft of the motor 32 by a coupling, the left end of the rotating rod 3 passing through the side support platform 2 and extending to the left side of the side support platform 2, a stop plate 4 fixedly installed at the end of the rotating rod 3 extending to the left side of the side support platform 2, a rectangular rod 5 fixedly installed on the left side of the stop plate 4, a winding drum 6 provided on the surface of the rectangular rod 5, and a cable body 31 wound on the surface of the winding drum 6.

[0021] Furthermore, a square groove 7 is provided at the left end of the rectangular rod 5, and a cross guide groove 8 extending to the outside is provided on the inner wall of the square groove 7. An internal threaded cylinder 9 is fixedly installed on the right side of the inner cavity of the square groove 7. A threaded insert rod 10 is threadedly connected to the inner side of the internal threaded cylinder 9. An internal threaded cross plate 11 is threadedly connected to the surface of the threaded insert rod 10. The internal threaded cross plate 11 is slidably connected to the inner side of the cross guide groove 8, and the internal threaded cross plate 11 is in contact with the left side of the rectangular rod 5.

[0022] The second threaded rod 13 is rotatably mounted on the right side of the inner cavity of the side support platform 2 via a bearing component, and the left end of the second threaded rod 13 passes through the side support platform 2 and extends to the left side of the side support platform 2. The second threaded rod 13 and the rotating rod 3 are connected by a pulley 15 and a belt 16. The driven rod 14 is rotatably mounted on the left side of the side support platform 2 via a bearing component.

[0023] The second threaded rod 13 is threadedly connected to a threaded sleeve 17, the driven rod 14 is slidably mounted with a guide sleeve 18, and a lead wire cylinder 19 is fixedly installed between the guide sleeve 18 and the threaded sleeve 17. A vertical support plate 20 is fixedly installed on the left side of the top of the base platform 1. The left ends of the second threaded rod 13 and the driven rod 14 are both connected to one side of the vertical support plate 20 through bearing components.

[0024] The first roller 21 is rotatably mounted on the left side of the side support platform 2 through an opening. The side slide plate 22 is fixedly mounted on the right side of the inner cavity of the side support platform 2 through a fixing plate. A square slide block 23 is slidably mounted on the inner side of the side slide block 22. A load-bearing rod 24 is fixedly mounted on the left side of the square slide block 23. A first guide opening 29 is opened on the left side of the side support platform 2. The left end of the load-bearing rod 24 passes through the first guide opening 29 and extends to the left side of the side support platform 2. A second roller 25, which cooperates with the first roller 21, is rotatably mounted on the end of the load-bearing rod 24 extending to the left side of the side support platform 2 through a bearing component.

[0025] The first roller 21 and the second roller 25 are both equipped with rubber sleeves 26 that cooperate with each other. The rubber sleeves 26 are made of soft rubber and have strong adhesion and high friction. One end of the cable body 31 passes through the lead tube 19 and the two rubber sleeves 26 in sequence and extends to the front of the base platform 1.

[0026] Among them, a threaded rotating cylinder 27 is fixedly installed on the surface of the load-bearing rod 24 and on the inner side of the side support platform 2 through an opening. The inner side of the threaded rotating cylinder 27 is threadedly connected to a first threaded rotating rod 12. The rear end of the first threaded rotating rod 12 is rotatably connected to the rear part of the inner cavity of the side support platform 2 through a bearing. The front end of the first threaded rotating rod 12 passes through the side support platform 2 and extends to the front part of the side support platform 2. A ring handle 28 is fixedly installed at the end of the first threaded rotating rod 12 that extends to the front part of the side support platform 2.

[0027] The vertical support plate 20 has a second guide opening 30 on its left side, which is used in conjunction with the first roller 21 and the second roller 25.

[0028] In use, first install the winding drum 6 on the surface of the rectangular rod 5, then rotate the internal thread cross plate 11 to connect it to the surface of the threaded insert rod 10. Then rotate the internal thread cross plate 11 to adjust the spacing and insert it into the inner side of the cross guide groove 8 for sliding connection. Then place the internal thread cross plate 11 against the left side of the rectangular rod 5 and continue to rotate the threaded insert rod 10 until the threaded insert rod 10 is connected to the internal thread cylinder 9. At this time, the internal thread cross plate 11 fixes the rectangular rod 5. Then, put the rubber sleeve 26 on the surface of the first roller 21 and the second roller 25 from the second guide port 30. First, wrap one end of the cable body 31 around the surface of the rectangular rod 5, and stretch the other end through the lead tube 19 and between the two rubber sleeves 26 to the front. Then, hold the ring handle 28 to drive the first threaded rotating rod 12 to rotate, thereby driving the load-bearing rod 24 and the square slide 23. The second roller 25 moves toward the first roller 21, thereby clamping the cable body 31 with two rubber sleeves 26. The clamping tightness is adjusted directly with the cable body 31. After adjustment, the motor 32 is started, causing the rotating rod 3 to drive the rectangular rod 5 and the winding drum 6 to rotate, thereby pulling and winding the cable body 31. When the cable body 31 is pulled, the clamping of the two rubber sleeves 26 stretches and straightens the cable body 31 as a whole. At the same time, the transmission of the pulley 15 and the belt 16 drives the second threaded rotating rod 13 to rotate. At this time, the second threaded rotating rod 13 is connected to the threaded sleeve 17 by the thread, and guided by the guide sleeve 18 and the driven rod 14, the lead drum 19 drives the cable body 31 to move back and forth, so that the cable body 31 is taut and evenly wound on the surface of the winding drum 6. Therefore, the operator does not need to manually stretch and straighten the cable body 31, saving physical strength.

[0029] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

Claims

1. A positioning fixture for winding a high-voltage coil of a transformer, comprising a base platform (1), characterized in that: A side support platform (2) is fixedly installed on the right side of the top of the base platform (1) by a fixing plate. A motor (32) is fixedly installed on the right side of the base platform (1) by a bracket. A rotating rod (3) is fixedly installed on the output shaft of the motor (32) by a coupling. The left end of the rotating rod (3) passes through the side support platform (2) and extends to the left side of the side support platform (2). A stop plate (4) is fixedly installed at the end of the rotating rod (3) that extends to the left side of the side support platform (2). A rectangular rod (5) is fixedly installed on the left side of the stop plate (4). A winding drum (6) is provided on the surface of the rectangular rod (5), and a cable body (31) is wound on the surface of the winding drum (6).

2. The transformer high-voltage coil winding positioning fixture according to claim 1, characterized in that: The left end of the rectangular rod (5) is provided with a square groove (7), and the inner wall of the square groove (7) is provided with a cross guide groove (8) that extends to the outside. An internal threaded cylinder (9) is fixedly installed on the right side of the inner cavity of the square groove (7). A threaded insert rod (10) is threadedly connected to the inner side of the internal threaded cylinder (9). An internal threaded cross plate (11) is threadedly connected to the surface of the threaded insert rod (10). The internal threaded cross plate (11) is slidably connected to the inner side of the cross guide groove (8), and the internal threaded cross plate (11) is in contact with the left side of the rectangular rod (5).

3. The transformer high-voltage coil winding positioning fixture according to claim 2, characterized in that: The right side of the inner cavity of the side support platform (2) is rotatably mounted with a second threaded rod (13) via a bearing component, and the left end of the second threaded rod (13) passes through the side support platform (2) and extends to the left side of the side support platform (2). The second threaded rod (13) and the rotating rod (3) are connected by a pulley (15) and a belt (16). The left side of the side support platform (2) is rotatably mounted with a driven rod (14) via a bearing component.

4. The transformer high-voltage coil winding positioning fixture according to claim 3, characterized in that: The second threaded rod (13) has a threaded sleeve (17) threadedly connected to its surface. The driven rod (14) has a guide sleeve (18) slidably mounted on its surface. A lead wire cylinder (19) is fixedly installed between the guide sleeve (18) and the threaded sleeve (17). A vertical support plate (20) is fixedly installed on the left side of the top of the base platform (1). The left ends of the second threaded rod (13) and the driven rod (14) are both connected to one side of the vertical support plate (20) through bearing components.

5. The transformer high-voltage coil winding positioning fixture according to claim 4, characterized in that: The left side of the side support platform (2) is rotatably mounted with a first roller (21) through an opening. The right side of the inner cavity of the side support platform (2) is fixedly mounted with a side slide plate (22) through a fixing plate. The inner side of the side slide plate (22) is slidably mounted with a square slide block (23). The left side of the square slide block (23) is fixedly mounted with a load-bearing rod (24). The left side of the side support platform (2) is provided with a first guide opening (29). The left end of the load-bearing rod (24) passes through the first guide opening (29) and extends to the left side of the side support platform (2). The end of the load-bearing rod (24) extending to the left side of the side support platform (2) is rotatably mounted with a second roller (25) that cooperates with the first roller (21) through a bearing component.

6. The transformer high-voltage coil winding positioning fixture according to claim 5, characterized in that: The surfaces of the first roller (21) and the second roller (25) are each fitted with rubber sleeves (26) that cooperate with each other. One end of the cable body (31) passes through the lead tube (19) and the two rubber sleeves (26) in sequence and extends to the front of the base platform (1).

7. A transformer high-voltage coil winding positioning fixture according to claim 6, characterized in that: A threaded rotating cylinder (27) is fixedly installed on the surface of the load-bearing rod (24) and on the inner side of the side support platform (2) through an opening. A first threaded rotating rod (12) is threadedly connected to the inner side of the threaded rotating cylinder (27). The rear end of the first threaded rotating rod (12) is rotatably connected to the rear part of the inner cavity of the side support platform (2) through a bearing. The front end of the first threaded rotating rod (12) passes through the side support platform (2) and extends to the front part of the side support platform (2). A ring handle (28) is fixedly installed at one end of the first threaded rotating rod (12) extending to the front part of the side support platform (2).

8. The transformer high-voltage coil winding positioning fixture according to claim 7, characterized in that: The left side of the vertical support plate (20) is provided with a second guide (30) that is used in conjunction with the first roller (21) and the second roller (25).

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