A constant tension wire feeding device for transformer winding under thermal circuit model
By introducing wire pulling, pressing, displacement, and clamping mechanisms into the constant tension wire supply device for transformer windings, the problems of wire retraction and loss of wire ends during coil replacement are solved, ensuring the stability of the wire and the continuity of winding operation, and realizing constant tension control and reliable clamping of wire ends.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WUHU ZHUOYA ELECTRIC
- Filing Date
- 2023-10-24
- Publication Date
- 2026-05-12
AI Technical Summary
In the existing technology, transformer winding constant tension wire supply devices are prone to problems such as wire retraction, loss of take-up wire ends, and inability to fix take-up wire ends when changing coils. They are also prone to wire drop during operation and cannot flexibly follow the movement of the winding.
A constant tension wire supply device for transformer windings under a thermal circuit model was designed, comprising a main housing, take-up roller, wire pulling device, wire pressing device, displacement device, constant force device, and wire clamping device. By setting up wire pulling, wire pressing, displacement, and wire clamping mechanisms, stable traction, fixation, and constant tension control of the metal wire are achieved.
It solves the problems of wire retraction and loss of wire ends when changing take-up rollers, ensuring the stability of the wire during winding operation, preventing wire from falling off, and enabling flexible following of winding movement and constant tension adjustment.
Smart Images
Figure CN117361225B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of constant tension wire supply technology, specifically to a constant tension wire supply device for transformer windings under a thermal circuit model. Background Technology
[0002] Constant tension wire laying is a new railway electrification construction technique introduced to my country from Germany at the end of the last century and the beginning of this century. Its principle is to maintain a certain amount of tension throughout the wire laying process. Only overhead contact line projects improved with this technique can meet the speed requirements of high-speed railways. Currently, all electrified railways under construction in my country use this advanced construction technique. The picture shows a constant tension wire laying vehicle performing wire laying operations.
[0003] In the prior art, such as the constant tension cable supply device for transformer windings under a thermal circuit model (Chinese Patent No. CN109160433A), the constant tension winch includes a horizontally positioned motor, a stranded reel driven by the motor, and a reducer and a magnetic powder brake driven between the motor and the stranded reel. A clutch is provided between the magnetic powder brake and the motor. It also includes a cable laying mechanism horizontally spaced from the stranded reel along its axial direction. The cable laying mechanism can move along the axial direction of the stranded reel, and its range of motion covers both ends of the reel. A cable guide component is provided on the upper part of the cable laying mechanism for the cable to pass horizontally. In use, two constant tension winches are arranged opposite each other to form a cable winding and unwinding device. The motor and magnetic powder brake of this device achieve tension control, tightening the portion between the two constant tension winches and facilitating the installation of cable sleeves between this portion of the cable.
[0004] However, in the existing technology, it may be necessary to replace the coil during use, which requires the equipment to stop working. This may result in the metal wire retracting due to the relative force of constant tension, as well as the problem of losing the take-up wire end and being unable to fix the take-up wire end. In addition, it cannot solve the problem of the winding following the repeated movement of the winding during operation, which may lead to the problem of wire falling off. Summary of the Invention
[0005] To address the shortcomings of existing technologies, the technical solution adopted by this invention is as follows: a constant tension wire feeding device for transformer windings under a thermal circuit model, comprising a main housing, a take-up roller rotatably connected to the inner surface of the main housing, a metal wire disposed on the outer surface of the take-up roller, a wire pulling device disposed outside the metal wire, a wire pressing device disposed to the right of the wire pulling device, a displacement device disposed outside the wire pressing device, a constant force device disposed at the bottom of the displacement device, and a wire clamping device disposed outside the constant force device. The wire pulling device includes a wire pulling shell, a pull ring disposed inside the wire pulling shell, the outer surface of the pull ring being slidably connected to the inner surface of the wire pulling shell, the inner surface of the pull ring being slidably connected to the outer surface of the metal wire, and a traction wire fixedly connected to the top of the pull ring. These functions solve the problems of easy loss of the take-up wire end and inability to fix the take-up wire end after shearing the metal wire when changing the take-up roller in traditional equipment.
[0006] Preferably, the outer surface of the traction wire is rotatably connected to a first directional wheel, the outer surface of the first directional wheel is fixedly connected to the outer surface of the pull wire housing, the top of the pull wire housing is provided with a top plate, the outer surface of the top plate is fixedly connected to the outer surface of the main housing, the top of the pull wire housing is fixedly connected to a slider, the lower surface of the slider is slidably connected to the upper surface of the top plate, and the outer surface of the slider is fixedly connected to a first connecting plate. The above functions solve the problem that traditional equipment cannot flexibly follow the movement of the winding during operation.
[0007] Preferably, the pressing device includes a second connecting plate, a cylinder is fixedly connected to the bottom of the second connecting plate, a second directional wheel is fixedly connected to the outer surface of the cylinder output end, a pressure plate is fixedly connected to the lower surface of the cylinder output end, a guide roller is provided at the bottom of the pressure plate, the inner surface of the guide roller is slidably connected to the outer surface of the metal wire, the lower surface of the cylinder is slidably connected to the upper surface of the top plate, and the output end of the cylinder drives the pressure plate to move downward until the metal wire is pressed onto the inner wall of the guide roller;
[0008] As the pressure plate finishes fixing and squeezing the metal wire, it drives the traction wire and the second directional wheel on the outer surface of the cylinder output end. This causes the downward force to be converted into a downward oblique pulling force on the traction wire on the first directional wheel. The traction wire pulls the pull ring, causing the pull ring to slide upward inside the pull wire housing, and at the same time, the pull ring locks the internal metal wire.
[0009] Preferably, the displacement device includes a third connecting plate, on the inner surface of which a guide rod is fixedly connected. One end of the guide rod is rotatably connected to a bearing, and the other end of the guide rod is slidably connected to the inner surface of the main housing. The outer surface of the bearing is rotatably connected to the inner surface of the guide roller, thereby driving the third connecting plate. This drives the wire pressing device and the wire pulling device at the top of the top plate to slide synchronously. When the metal wire moves in the opposite direction, the second spring releases its elastic potential energy, which can more quickly push the guide roller and the metal wire to move.
[0010] Preferably, the inner surface of the guide roller is slidably connected to a fixed shaft, both ends of which are fixedly connected to the inner surface of the main housing. A second spring is provided on the outer surface of the fixed shaft. One end of the second spring is fixedly connected to the outer surface of the guide roller, and the other end of the second spring is fixedly connected to the outer surface of the main housing. The reciprocating traction force of the metal wire will drive the guide roller towards the compression space of the second spring. Therefore, while the guide roller rotates on the outer surface of the fixed shaft, it also drives the bearing to rotate, pushing the guide rod.
[0011] Preferably, the constant force device includes a constant force roller, with a movable shaft rotatably connected to the inner surface of the constant force roller. The outer surface of the movable shaft is slidably connected to the inner surface of the main housing. Both ends of the movable shaft are fixedly connected to a first spring. A fixed frame is fixedly connected to the outer surface of the movable shaft. The outer surface of the fixed frame is slidably connected to the inner surface of the main housing. A rotation sensor is fixedly connected to the inner surface of the main housing. The inner surface of the constant force roller is slidably connected to the outer surface of the metal wire. When the hydraulic rod connected to the fixed frame in the constant force device is activated, the hydraulic rod pulls the fixed frame. The fixed frame drives the movable shaft, and the movable shaft drives the constant force roller to push or pull to the right, thereby changing the magnitude of the constant tension.
[0012] Preferably, the clamping device includes clamping plates, with a fixed block slidably connected to the inner surface of the clamping plates. Both ends of the fixed block are fixedly connected to the outer surface of the main housing. A bidirectional lead screw is threadedly connected to the inner surface of the clamping plates. The outer surface of the clamping plates is slidably connected to the outer surface of the main housing. When the motor connected to the bidirectional lead screw is started, the rotation of the motor drives the bidirectional lead screw to rotate within the internal threads of the two clamping plates. Because the threads at both ends of the bidirectional lead screw are opposite, the two clamping plates can slide relative to each other on the outer surface of the fixed block.
[0013] Preferably, the top plate has two sliding grooves inside, and the outer surface of the pull cable shell is slidably connected to the inner surface of the top plate. The downward force is converted into a downward oblique pulling force of the traction line on the first directional wheel. The traction line pulls the pull ring, causing the pull ring to slide upward inside the pull cable shell.
[0014] Preferably, the outer surface of the third connecting plate is slidably connected to the inner surface of the top plate, the bearing is circular in shape, and the guide roller rotates on the outer surface of the fixed shaft, which also drives the bearing to rotate, pushing the guide rod and driving the third connecting plate, thus driving the pressure device at the upper end of the top plate.
[0015] The beneficial effects of this invention are as follows:
[0016] 1. This invention, by setting up a wire pressing device, starts a motor connected to the take-up roller shaft. The motor uses constant power to rotate the take-up roller inside the main housing. The take-up roller then pulls the metal wire, which passes through the inner surfaces of the guide roller and the constant force roller. When the take-up roller has finished winding the wire, or when the metal wire resource at the clamping device is exhausted, the motor connected to the take-up roller shaft is shut off to prepare for subsequent work. At this time, the rotation sensor triggers a signal, sending a command to start the cylinder to the back-end terminal. Then, the output end of the cylinder drives the pressure plate downward until the metal wire is pressed against the inner wall of the guide roller. The above function solves the problem that traditional equipment may need to pause work, resulting in the metal wire retracting due to the relative force of constant tension.
[0017] 2. This invention, by setting up a wire pulling device, simultaneously drives the traction wire and the second directional wheel on the outer surface of the cylinder output end when the pressure plate finishes fixing and squeezing the metal wire. This converts the downward force into a downward oblique pulling force on the traction wire on the first directional wheel. The traction wire pulls the pull ring, causing the pull ring to slide upward inside the wire pulling shell. At the same time, the pull ring locks the internal traction wire. The above functions solve the problems of easy loss of the take-up wire end and inability to fix the take-up wire end when changing the take-up roller in traditional equipment.
[0018] 3. By setting up a displacement device, the take-up roller requires the metal wire to reciprocate in a circular motion outside the take-up roller during the take-up rotation process. Then, the reciprocating traction force of the metal wire drives the guide roller towards the compression space of the second spring. Therefore, while the guide roller rotates on the outer surface of the fixed shaft, it also drives the bearing to rotate, pushing the guide rod and driving the third connecting plate. Thus, it drives the wire pressing device and the wire pulling device at the top of the top plate to slide synchronously. When the metal wire moves in the opposite direction, the second spring releases elastic potential energy, which can more quickly push the guide roller and the metal wire to move. The above functions solve the problem of wire falling off when the wire supply winding is working in traditional equipment.
[0019] 4. This invention, by setting up a wire clamping device, activates the hydraulic rod connected to the fixed frame in the constant force device. The hydraulic rod pulls the fixed frame, which drives the moving shaft. The moving shaft drives the constant force roller to push and pull to the right, thereby changing the magnitude of the constant tension. When the equipment is not in use, the rotation sensor sends a command to start the cylinder to the back-end terminal, which then starts the motor connected to the bidirectional lead screw. The motor rotation drives the bidirectional lead screw to rotate on the internal threads of the two clamping plates. Because the threads at both ends of the bidirectional lead screw are opposite, the two clamping plates can slide relative to each other on the outer surface of the fixed block, ultimately completing the function of clamping the wire end of the metal wire inlet. The above functions solve the problem of wire end loss when rewiring may occur in traditional equipment. Attached Figure Description
[0020] Figure 1 This is the front view of the present invention;
[0021] Figure 2 This is a cross-sectional view of the present invention;
[0022] Figure 3 This is a structural schematic diagram of the back of the invention;
[0023] Figure 4 This is the present invention. Figure 2 A schematic diagram of the structure at point A;
[0024] Figure 5 This is the present invention. Figure 2 A schematic diagram of the structure at point B;
[0025] Figure 6 This is the present invention. Figure 3 A schematic diagram of the structure at point C;
[0026] Figure 7 This is the present invention. Figure 3 A schematic diagram of the structure at point D.
[0027] In the diagram: 1. Main housing; 2. Take-up roller; 3. Metal wire; 4. Wire pulling device; 5. Wire pressing device; 6. Constant force device; 7. Wire clamping device; 8. Displacement device; 10. Top plate; 11. Slide groove; 12. Guide roller; 13. Constant force roller; 14. Fixing frame; 15. First spring; 16. Rotation sensor; 17. Moving shaft; 401. Wire pulling shell; 402. Pull ring; 403. Traction line; 404. First directional wheel; 405. Slider; 406. First connecting plate; 501. Second connecting plate; 502. Cylinder; 503. Pressure plate; 504. Second directional wheel; 701. Clamping plate; 702. Fixing block; 703. Bidirectional lead screw; 801. Third connecting plate; 802. Guide rod; 803. Second spring; 804. Fixing shaft; 805. Bearing. Detailed Implementation
[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose. Example
[0029] Please see Figure 1 - Figure 3 This invention provides a technical solution: a constant tension wire supply device for transformer windings under a thermal circuit model, comprising a main housing 1, a take-up roller 2 rotatably connected to the inner surface of the main housing 1, a metal wire 3 disposed on the outer surface of the take-up roller 2, a wire pulling device 4 disposed outside the metal wire 3, a wire pressing device 5 disposed on the right side of the wire pulling device 4, a displacement device 8 disposed outside the wire pressing device 5, a constant force device 6 disposed at the bottom of the displacement device 8, and a wire clamping device 7 disposed outside the constant force device 6. The wire pulling device 4 includes a wire pulling shell 401, a pull ring 402 disposed inside the wire pulling shell 401, the outer surface of the pull ring 402 being slidably connected to the inner surface of the wire pulling shell 401, the inner surface of the pull ring 402 being slidably connected to the outer surface of the metal wire 3, and a traction wire 403 fixedly connected to the top of the pull ring 402. The above functions solve the problems of easy loss of the take-up wire end and inability to fix the take-up wire end when the metal wire 3 is cut during the replacement of the take-up roller 2 in traditional equipment.
[0030] The outer surface of the traction wire 403 is rotatably connected to a first directional wheel 404. The outer surface of the first directional wheel 404 is fixedly connected to the outer surface of the pull wire housing 401. A top plate 10 is provided on the top of the pull wire housing 401. The outer surface of the top plate 10 is fixedly connected to the outer surface of the main housing 1. A slider 405 is fixedly connected to the top of the pull wire housing 401. The lower surface of the slider 405 is slidably connected to the upper surface of the top plate 10. A first connecting plate 406 is fixedly connected to the outer surface of the slider 405. The above functions solve the problem that traditional equipment cannot flexibly follow the movement of the winding during operation.
[0031] The pressing device 5 includes a second connecting plate 501. A cylinder 502 is fixedly connected to the bottom of the second connecting plate 501. A second directional wheel 504 is fixedly connected to the outer surface of the output end of the cylinder 502. A pressure plate 503 is fixedly connected to the lower surface of the output end of the cylinder 502. A guide roller 12 is provided at the bottom of the pressure plate 503. The inner surface of the guide roller 12 is slidably connected to the outer surface of the metal wire 3. The lower surface of the cylinder 502 is slidably connected to the upper surface of the top plate 10. The output end of the cylinder 502 drives the pressure plate 503 to move downward until the metal wire 3 is pressed onto the inner wall of the guide roller 12. Example
[0032] Please see Figure 4 - Figure 7 The present invention provides a technical solution: Based on embodiment one, the displacement device 8 includes a third connecting plate 801, a guide rod 802 is fixedly connected to the inner surface of the third connecting plate 801, a bearing 805 is rotatably connected to one end of the guide rod 802, and the other end of the guide rod 802 is slidably connected to the inner surface of the main housing 1. The outer surface of the bearing 805 is rotatably connected to the inner surface of the guide roller 12, thereby driving the third connecting plate 801, thus driving the synchronous sliding of the pressing device 5 and the pulling device 4 at the upper end of the top plate 10. When the metal wire 3 moves in the opposite direction, the second spring 803 releases elastic potential energy, which can more quickly push the guide roller 12 and the metal wire 3 to move.
[0033] The inner surface of the guide roller 12 is slidably connected to a fixed shaft 804. Both ends of the fixed shaft 804 are fixedly connected to the inner surface of the main housing 1. A second spring 803 is provided on the outer surface of the fixed shaft 804. One end of the second spring 803 is fixedly connected to the outer surface of the guide roller 12, and the other end of the second spring 803 is fixedly connected to the outer surface of the main housing 1. The reciprocating traction force of the metal wire 3 will drive the guide roller 12 to compress the space towards the second spring 803. Therefore, while the guide roller 12 rotates on the outer surface of the fixed shaft 804, it also drives the bearing 805 to rotate, pushing the guide rod 802.
[0034] The constant force device 6 includes a constant force roller 13. A movable shaft 17 is rotatably connected to the inner surface of the constant force roller 13. The outer surface of the movable shaft 17 is slidably connected to the inner surface of the main housing 1. A first spring 15 is fixedly connected to both ends of the movable shaft 17. A fixed frame 14 is fixedly connected to the outer surface of the movable shaft 17. The outer surface of the fixed frame 14 is slidably connected to the inner surface of the main housing 1. A rotation sensor 16 is fixedly connected to the inner surface of the main housing 1. The inner surface of the constant force roller 13 is slidably connected to the outer surface of the metal wire 3. When the hydraulic rod connected to the fixed frame 14 in the constant force device 6 is activated, the hydraulic rod pulls the fixed frame 14. The fixed frame 14 drives the movable shaft 17. The movable shaft 17 drives the constant force roller 13 to push and pull to the right, thereby changing the magnitude of the constant tension.
[0035] The clamping device 7 includes a clamping plate 701, with a fixing block 702 slidably connected to the inner surface of the clamping plate 701. Both ends of the fixing block 702 are fixedly connected to the outer surface of the main housing 1. A bidirectional lead screw 703 is threadedly connected to the inner surface of the clamping plate 701. The outer surface of the clamping plate 701 is slidably connected to the outer surface of the main housing 1. When the motor connected to the bidirectional lead screw 703 is started, the motor rotates and drives the bidirectional lead screw 703 to rotate in the internal threads of the two clamping plates 703. Because the threads at both ends of the bidirectional lead screw 703 are opposite, the two clamping plates 703 can slide relative to each other on the outer surface of the fixing block 702.
[0036] The top plate 10 has two sliding grooves 11 inside. The outer surface of the pull cable shell 401 is slidably connected to the inner surface of the top plate 10. The downward force is converted into the traction line 403 forming a downward oblique pulling force on the first directional wheel 404. The traction line 403 pulls the pull ring 402, causing the pull ring 402 to slide upward inside the pull cable shell 401.
[0037] The outer surface of the third connecting plate 801 is slidably connected to the inner surface of the top plate 10. The bearing 805 is circular in shape. While the guide roller 12 rotates on the outer surface of the fixed shaft 804, it also drives the bearing 805 to rotate, pushing the guide rod 802 and driving the third connecting plate 801, thus driving the pressure device 5 at the upper end of the top plate 10.
[0038] Working principle:
[0039] In operation, the motor connected to the shaft of the take-up roller 2 is started. The motor rotates at a constant power, causing the take-up roller 2 to rotate inside the main housing 1. The take-up roller 2 then pulls the metal wire 3, which passes through the inner surfaces of the guide roller 12 and the constant force roller 13. When the take-up roller 2 has finished winding the wire, or when the metal wire 3 resource at the clamping device 7 is exhausted, the motor connected to the shaft of the take-up roller 2 will be shut off to prepare for subsequent work. At this time, the rotation sensor 16 will trigger a signal to send a command to start the cylinder 502 to the back-end terminal. Then, the output end of the cylinder 502 drives the pressure plate 503 to move downward until the metal wire 3 is pressed against the inner wall of the guide roller 12. The above function solves the problem that traditional equipment may need to pause work, and the metal wire 3 may retract due to the relative force of constant tension.
[0040] During use, when the pressure plate 503 completes the fixing and squeezing of the metal wire 3, it drives the traction line 403 and the second directional wheel 504 on the outer surface of the output end of the cylinder 502, so that the downward force is converted into the traction line 403 forming a downward oblique pulling force on the first directional wheel 404. The traction line 403 pulls the pull ring 402, causing the pull ring 402 to slide upward inside the pull housing 401. At the same time, the pull ring 402 locks the metal wire 3 inside. The above functions solve the problem that when the metal wire 3 is cut during the replacement of the take-up roller 2 in traditional equipment, the take-up wire end is easily lost and cannot be fixed.
[0041] During use, as the take-up roller 2 rotates, the metal wire 3 needs to reciprocate and circulate outside the take-up roller 2. Then, the reciprocating traction force of the metal wire 3 will drive the guide roller 12 to compress the space of the second spring 803. Therefore, while the guide roller 12 rotates on the outer surface of the fixed shaft 804, it also drives the bearing 805 to rotate, pushing the guide rod 802 and driving the third connecting plate 801. Thus, the wire pressing device 5 and the wire pulling device 4 at the top of the top plate 10 can slide synchronously. When the metal wire 3 moves in the opposite direction, the second spring 803 releases elastic potential energy, which can push the guide roller 12 and the metal wire 3 to move more quickly. The above functions solve the problem of wire falling off when the wire supply winding is working in traditional equipment.
[0042] When in use, the hydraulic rod connected to the fixed frame 14 in the constant force device 6 is activated. The hydraulic rod pulls the fixed frame 14, which drives the moving shaft 17. The moving shaft 17 drives the constant force roller 13 to push and pull to the right, thereby changing the magnitude of the constant tension. When the equipment is not in use, the rotation sensor 16 sends the command to start the cylinder 502 to the background terminal, and then starts the motor connected to the bidirectional lead screw 703. The rotation of the motor drives the bidirectional lead screw 703 to rotate in the internal threads of the two clamping plates 701. Because the threads at both ends of the bidirectional lead screw 703 are opposite, the two clamping plates 701 can slide relative to each other on the outer surface of the fixed block 702, thus completing the function of clamping the wire end of the metal wire inlet. The above functions solve the problem that the wire end of the inlet may be lost when rewiring in traditional equipment.
[0043] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.
Claims
1. A constant tension power supply device for transformer windings under a thermal circuit model, comprising a main housing (1), characterized in that: The inner surface of the main housing (1) is rotatably connected to a take-up roller (2), the outer surface of the take-up roller (2) is provided with a metal wire (3), the outside of the metal wire (3) is provided with a wire pulling device (4), the right side of the wire pulling device (4) is provided with a wire pressing device (5), the outside of the wire pressing device (5) is provided with a displacement device (8), the bottom of the displacement device (8) is provided with a constant force device (6), the outside of the constant force device (6) is provided with a wire clamping device (7), the wire pulling device (4) includes a wire pulling shell (401), the inside of the wire pulling shell (401) is provided with a pull ring (402), the outer surface of the pull ring (402) is slidably connected to the inner surface of the wire pulling shell (401), the inner surface of the pull ring (402) is slidably connected to the outer surface of the metal wire (3), and the top of the pull ring (402) is fixedly connected with a traction line (403). The outer surface of the traction line (403) is rotatably connected to a first directional wheel (404), the outer surface of the first directional wheel (404) is fixedly connected to the outer surface of the pull wire shell (401), a top plate (10) is provided on the top of the pull wire shell (401), the outer surface of the top plate (10) is fixedly connected to the outer surface of the main shell (1), a slider (405) is fixedly connected to the top of the pull wire shell (401), the lower surface of the slider (405) is slidably connected to the upper surface of the top plate (10), and a first connecting plate (406) is fixedly connected to the outer surface of the slider (405). The wire pressing device (5) includes a second connecting plate (501), a cylinder (502) is fixedly connected to the bottom of the second connecting plate (501), a second directional wheel (504) is fixedly connected to the outer surface of the output end of the cylinder (502), a pressure plate (503) is fixedly connected to the lower surface of the output end of the cylinder (502), a guide roller (12) is provided at the bottom of the pressure plate (503), the inner surface of the guide roller (12) is slidably connected to the outer surface of the metal wire (3), and the lower surface of the cylinder (502) is slidably connected to the upper surface of the top plate (10). When the pressure plate (503) finishes fixing and squeezing the metal wire (3), it drives the traction line (403) on the outer surface of the output end of the cylinder (502) and the second directional wheel (504), so that the downward force is converted into the traction line (403) forming a downward oblique pulling force on the first directional wheel (404). The traction line (403) pulls the pull ring (402), causing the pull ring (402) to slide upward inside the pull wire shell (401), and at the same time, the pull ring (402) locks the metal wire (3) inside.
2. The transformer winding constant tension supply device under a thermal circuit model according to claim 1, characterized in that: The displacement device (8) includes a third connecting plate (801), a guide rod (802) is fixedly connected to the inner surface of the third connecting plate (801), a bearing (805) is rotatably connected to one end of the guide rod (802), the other end of the guide rod (802) is slidably connected to the inner surface of the main housing (1), and the outer surface of the bearing (805) is rotatably connected to the inner surface of the guide roller (12).
3. The transformer winding constant tension supply device under a thermal circuit model according to claim 2, characterized in that: The inner surface of the guide roller (12) is slidably connected to a fixed shaft (804). Both ends of the fixed shaft (804) are fixedly connected to the inner surface of the main housing (1). A second spring (803) is provided on the outer surface of the fixed shaft (804). One end of the second spring (803) is fixedly connected to the outer surface of the guide roller (12), and the other end of the second spring (803) is fixedly connected to the outer surface of the main housing (1).
4. The transformer winding constant tension supply device under a thermal circuit model according to claim 1, characterized in that: The constant force device (6) includes a constant force roller (13), the inner surface of which is rotatably connected to a movable shaft (17), the outer surface of which is slidably connected to the inner surface of the main housing (1), both ends of which are fixedly connected to a first spring (15), the outer surface of which is fixedly connected to a fixed frame (14), the outer surface of which is slidably connected to the inner surface of the main housing (1), the inner surface of which is fixedly connected to a rotation sensor (16), and the inner surface of which is slidably connected to the outer surface of the metal wire (3).
5. A constant tension power supply device for transformer windings under a thermal circuit model according to claim 1, characterized in that: The clamping device (7) includes a clamping plate (701), a fixing block (702) is slidably connected to the inner surface of the clamping plate (701), both ends of the fixing block (702) are fixedly connected to the outer surface of the main shell (1), a two-way screw (703) is threadedly connected to the inner surface of the clamping plate (701), and the outer surface of the clamping plate (701) is slidably connected to the outer surface of the main shell (1).
6. The transformer winding constant tension supply device under a thermal circuit model according to claim 1, characterized in that: The top plate (10) has two sliding grooves (11) inside, and the outer surface of the pull wire shell (401) is slidably connected to the inner surface of the top plate (10).
7. A constant tension power supply device for transformer windings under a thermal circuit model according to claim 2, characterized in that: The outer surface of the third connecting plate (801) is slidably connected to the inner surface of the top plate (10), and the bearing (805) is circular in shape.