A crack-resistant winding process for a dry-type transformer and its high-voltage coil.

Abstract

This application discloses a crack-resistant winding process for a dry-type transformer and its high-voltage coil. The process employs a testing device to detect the number of turns and wire diameter of the coil. The testing device includes a frame, a testing frame rotatably mounted on the frame, two clamping plates slidably mounted on the testing frame, a scale vertically mounted on the testing frame, a measuring mechanism for wire diameter detection, and a verification mechanism for wire diameter verification. The testing frame rotates about the axis of the coil, and the two clamping plates abut against the beginning and end of the coil, with the distance between the two clamping plates equal to the total length of the coil. This application provides accurate detection of the number of turns and wire diameter of the coil, and the coil produced by the winding process exhibits crack-resistant properties.

Description

Technical Field

[0001] This application relates to the field of transformer technology, and in particular to a dry-type transformer and its high-voltage coil anti-cracking winding process. Background Technology

[0002] Currently, dry-type transformers refer to transformers whose core and windings are not immersed in insulating oil, and are generally used in local lighting and electronic circuits. Because dry-type transformers do not contain oil, they eliminate the risks of fire, explosion, and pollution. Therefore, electrical codes and regulations do not require dry-type transformers to be placed in a separate room; these advantages provide a strong guarantee for the widespread application of dry-type transformers.

[0003] Among the related technologies, Chinese patent publication number CN103390493A proposes a winding method for a high-voltage coil with filler, which relates to the field of transformer technology. It ensures dielectric strength and partial discharge level through effective insulation spacing; in the winding process, it avoids defects such as sharp edges, sharp corners, and burrs formed by welding the broken points of the conductors by ensuring the uniformity of the wire spacing; at the same time, it has the characteristics of high work efficiency and good processing quality.

[0004] Regarding the aforementioned technologies, the inventors believe that the following defects exist: After the first layer of coil is wound, it is necessary to inspect the number of coil turns and the coil diameter. Currently, this is done by observation or manual measurement, and then compared with the number of coil turns and the coil diameter to determine whether it meets the standards, which is a defect that is troublesome to inspect. Summary of the Invention

[0005] To improve the problem of inaccurate detection of coil turns and wire diameter, this application provides a crack-resistant winding process for a dry-type transformer and its high-voltage coil.

[0006] The anti-cracking winding process for high-voltage coils provided in this application adopts the following technical solution:

[0007] A crack-resistant winding process for high-voltage coils includes the following steps:

[0008] S1. Select the appropriate mold according to the specifications and model of the coil, clamp the mold on the winding machine, then tighten the tailstock and lock the top. Adjust the speed of the winding machine according to the diameter of the coil being wound.

[0009] S2. An identification card is set on the opposite side of the wire outlet plate at the bottom of the mold. The distance between the identification card and the upper end of the coil is 100mm. A layer of polytetrafluoroethylene tape is wrapped from the bottom of the coil upwards with a 5mm pressing edge.

[0010] S3. Perform internal insulation treatment on the coil. The internal insulation treatment is as follows: First, wind a 0.3mm×70mm glass fiber cloth tape inside the coil, ensuring that adjacent glass fiber cloth tape turns do not contact each other; then, place a layer of mesh cloth on the glass fiber cloth tape, with the mesh cloth interface at the lead plate and a 5mm gap between the two ends of the interface; finally, wind a layer of glass fiber cloth tape for fixing the mesh cloth on the mesh cloth, the glass fiber cloth tape having a specification of 0.3mm×70mm, and measure the thickness of the insulation layer, ensuring that adjacent glass fiber cloth tape turns do not contact each other; wherein: one end of the mesh cloth is flush with the lower end of the coil, and a 5mm-8mm gap is left at the upper end of the coil;

[0011] S4. Mark the center line and segment lines on the inner insulation of the outgoing line plate;

[0012] S5. According to the requirements of the coil winding direction, start the winding of the coil from the beginning of the segment winding sequence, and fix the beginning part to the shaft mold with glass fiber cloth tape.

[0013] S6. After the first layer of the coil is wound, the number of turns and wire diameter of the wound coil are checked, and the tensioner is adjusted according to the test results.

[0014] S7. Place interlayer DMD insulating paper on the first layer coil, overlap the joint by 30mm and then raise the layer. Bend a small S-shape at the raising position and put a DMD insulating paper with a specification of 0.2mm×40mm×100mm at the raising cut. Then start winding the second layer. The specific winding process of the second layer is the same as step five.

[0015] S8. After a section of the coil is wound, measure the outer diameter of the coil wire and the total number of turns, tighten the end of the coil, and then use a layer of glass fiber cloth tape with a specification of 0.3mm×70mm to fix the coil.

[0016] S9. The coil is divided into four sections. After completing the process of the first section, repeat steps five to eight to wind the remaining three sections of the coil. The filling method between sections is as follows: use 1.2mm (recommended value or other similar thickness) mesh cloth cut into pieces of appropriate size, and then stack them to a thickness equal to the distance between sections. Two positioning mesh pieces need to be added on both sides, and then the mesh cloth is tied into a whole. Positioning blocks are placed along the circumferential direction between each section for support.

[0017] S10. Winding of coils with air passages: The inner part of the air passage is wound into four sections according to steps one to eight. Then, an insulating layer is wrapped around it. The outer layer is wound with a 0.3mm×70mm glass fiber cloth tape and tied into a figure-eight shape with glass fiber cloth. The air passage plate wrapped with reinforced glass fiber cloth is placed into the fixing groove and the air passages are filled with continuous felt. Then, the outer insulating layer of the air passage plate is wrapped and the outer four sections of coils are wound according to steps one to eight.

[0018] S11. Place a mesh cloth outside the air duct plate. It should be centered in the coil size, with the upper end extending about 3mm beyond the end of the formed coil, or the edge of the upper mesh strip should be flush with the end of the coil to ensure that the end of the coil is fully protected and to prevent splicing defects. Place a 0.1mm release film inside and outside the air duct, with the concave and convex surfaces having the same size. Remove the coil and transfer it to the next process.

[0019] In S6, a testing device is used to test the number of turns and wire diameter of the coil. The testing device includes a frame, a testing frame rotatably mounted on the frame, two clamping plates slidably mounted on the testing frame, a scale mounted vertically on the testing frame, a measuring mechanism for testing the wire diameter, and an approval mechanism for verifying the wire diameter. The testing frame rotates about the axis of the coil, and the two clamping plates abut against the beginning and end of the coil respectively. The distance between the two clamping plates is equal to the total length of the coil.

[0020] Optionally, the measuring mechanism includes a measuring frame slidably disposed on the clamping plate, a measuring block slidably disposed on the measuring frame, a measuring needle elastically disposed on the measuring block, and an marking component for marking the wire diameter. The measuring frame moves along the length direction of the coil, and the measuring block moves along the radial direction of the coil.

[0021] Optionally, the marking assembly includes a marking paper movably disposed on the detection frame, a winding part for winding the marking paper, a marking needle for marking the wire diameter position, a proximity switch, and a marking electric actuator. The marking paper moves along the length of the coil, the marking needle and the measuring needle are located on the same straight line, the tail end of the measuring needle abuts against the proximity switch in the initial state, the proximity switch is electrically connected to the marking electric actuator, and the marking needle punctures the marking needle.

[0022] Optionally, the verification mechanism includes a verification frame slidably disposed on the detection frame, a support slidably disposed on the verification frame, a verification plate elastically disposed on the support, a reciprocating part for controlling the reciprocating motion of the verification plate, and an adjustment component. The adjustment component is used to identify the positions of the verification plate and the marking needle on the marking paper. When the scale is in the initial position, the tail end of the verification plate abuts against the scale.

[0023] Optionally, the reciprocating part includes a reciprocating electric actuator, a reciprocating spring, a reciprocating block, and a reciprocating electromagnet. The bracket is provided with an approval hole for the movement of the approval plate. The side wall of the approval hole is provided with a reciprocating groove, both ends of which are open. The reciprocating block slides in the reciprocating groove. One end of the reciprocating spring is fixedly connected to one side of the reciprocating block and the corresponding end of the reciprocating groove. The reciprocating electric actuator is located on the side of the reciprocating block away from the spring. The reciprocating electric actuator controls the movement of the reciprocating electromagnet, and the reciprocating electromagnet attracts the reciprocating block.

[0024] Optionally, the adjustment assembly includes an adjustment lamp, a color sensor, a buzzer electrically connected to the color sensor, and a trigger. The adjustment lamp is located at one end of the reciprocating plate near the marking paper, and the end of the reciprocating plate is provided with an adjustment hole for mounting the adjustment lamp. After the color sensor identifies the color of the adjustment lamp, it triggers the buzzer to emit a sound. The trigger is used to identify the position of the marking needle relative to the position of the verification plate. The color sensor also slides on the clamping plate, and the color sensor and the measuring frame are located on the same clamping plate.

[0025] Optionally, the triggering unit includes two trigger plates and two trigger lights of different colors. The two trigger plates are respectively hinged to both sides of the approval plate. The approval plate is provided with a transmission part for simultaneously controlling the opening or closing of the two trigger plates.

[0026] Optionally, the transmission unit includes a transmission electric actuator, a gear, and two racks. The gear is rotatably mounted on the approval plate, and the two gears are located on both sides of the rack. The rack is slidably mounted on the approval plate. The gear is coaxially fixed with the hinge shaft corresponding to the trigger plate. The transmission electric actuator is used to control the reciprocating motion of the rack.

[0027] Optionally, the winding section includes two winding boxes, two winding motors, two winding rollers, and four winding ropes. The winding rollers are rotatably disposed inside the winding boxes. The four winding ropes are divided into two groups. The ends of the four winding ropes are respectively fixedly connected to the four corners of the marking paper. The two winding ropes in the same group are respectively fixedly connected to the same winding roller. During the movement of the ruler, the ruler passes through the gap between the two winding ropes.

[0028] The dry-type transformer provided in this application adopts the following technical solution:

[0029] A dry-type transformer includes a casing, an iron core, and a winding of the high-voltage coil manufactured using an anti-cracking winding process.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] 1. When it is necessary to detect the length of the coil, simply control the two clamping plates to move towards the coil, ensuring that the clamping plates are vertical and in contact with both ends of the coil. Then move the scale until it abuts against the ends of the two clamping plates, keeping the scale horizontal. At this point, the length of the coil can be read. Based on the set or standard number of coil turns, the wire diameter can be obtained. Thus, the standard value of the wire diameter can be obtained here. By comparing the actual measured data with the standard wire diameter, it can be determined whether there is a problem with the winding. If the wire diameter is greater than the standard value, the tension needs to be increased; if the wire diameter is less than the standard value, the tension needs to be decreased.

[0032] 2. As the marking needle is under the elastic force of the spring, its tail end separates from the proximity switch. The proximity switch triggers the marking electric actuator to work, which pushes the marking needle to move. The marking needle and the measuring needle are on the same straight line. Therefore, the position marked by the marking needle on the marking paper is the position of the measuring needle. Thus, the wire diameter can be determined based on the position of the clamping piece and the position of the measuring needle on the marking paper. Move the color sensor to the position of the verification plate. If the adjustment lamp of the verification plate is aligned with the marking hole at this time, in this embodiment, the adjustment lamp occupying one-third of the marking hole is considered to be overlapping with the marking hole. After the light from the adjustment lamp passes through the marking hole, the color sensor recognizes the color of the light from the adjustment lamp and triggers the buzzer to emit a sound, thus proving that the wire diameter of the coil meets the standard.

[0033] 3. When the color sensor does not detect the lamp tube of the adjustment lamp, the transmission electric push rod is triggered, the rack is pushed downward, and the two racks drive the two trigger plates to unfold. The trigger lamp is aligned with the label paper. In this embodiment, with the cooperation between the label paper and the trigger lamp, the light from the trigger lamp will only shine through the label hole. If the green light trigger lamp corresponds to the label hole, it means that the wire diameter is too small and the tension needs to be reduced. If the red light trigger lamp corresponds to the label hole, it means that the wire diameter is too large and the tension needs to be increased. This completes the detection and judgment of the wire diameter. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application;

[0035] Figure 2 yes Figure 1 An enlarged schematic diagram of part A in the middle;

[0036] Figure 3 This is a schematic diagram of the approving agency in Embodiment 1 of this application;

[0037] Figure 4 This is a schematic diagram of the transmission unit in Embodiment 1 of this application.

[0038] Reference numerals: 1. Frame; 2. Detection frame; 3. Clamping plate; 4. Scale; 5. Measuring frame; 6. Measuring block; 7. Measuring needle; 8. Marking paper; 9. Winding roller; 10. Winding box; 11. Light source; 12. Light sensor; 13. Marking needle; 14. Marking electric actuator; 15. Proximity switch; 16. Verification frame; 17. Support; 18. Verification plate; 19. Reciprocating electric actuator; 20. Reciprocating spring; 21. Reciprocating block; 22. Reciprocating electromagnet; 23. Reciprocating groove; 24. Verification hole; 25. Adjustment lamp; 26. Adjustment hole; 27. Color sensor; 28. Trigger plate; 29. ​​Trigger lamp; 30. Transmission electric actuator; 31. Gear; 32. Rack. Detailed Implementation

[0039] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0040] Example 1

[0041] This application discloses a crack-resistant winding process for high-voltage coils. (Refer to...) Figures 1-4 A crack-resistant winding process for high-voltage coils includes the following steps:

[0042] S1. Select the appropriate mold according to the specifications and model of the coil, clamp the mold on the winding machine, then tighten the tailstock and lock the top. Adjust the speed of the winding machine according to the diameter of the coil being wound.

[0043] S2. An identification card is set on the opposite side of the wire outlet plate at the bottom of the mold. The distance between the identification card and the upper end of the coil is 100mm. A layer of polytetrafluoroethylene tape is wrapped from the bottom of the coil upwards with a 5mm pressing edge.

[0044] S3. Perform internal insulation treatment on the coil. The internal insulation treatment specifically involves: first, winding a 0.3mm × 70mm glass fiber cloth tape inside the coil, ensuring that adjacent glass fiber cloth tape turns do not contact each other; then, placing a layer of mesh cloth on the glass fiber cloth tape, with the mesh cloth interface at the lead-out plate and a 5mm gap between the two ends of the interface; finally, winding a layer of glass fiber cloth tape to fix the mesh cloth, the glass fiber cloth tape having a specification of 0.3mm × 70mm, measuring the thickness of the insulation layer, and ensuring that adjacent glass fiber cloth tape turns do not contact each other; wherein: one end of the mesh cloth is flush with the lower end of the coil, and a 5mm-8mm gap is left at the upper end of the coil;

[0045] S4. Mark the center line and segment lines on the inner insulation of the outgoing line plate;

[0046] S5. According to the requirements of the coil winding direction, start the winding of the coil from the beginning of the segment winding sequence, and fix the beginning part to the shaft mold with glass fiber cloth tape.

[0047] S6. After the first layer of the coil is wound, the number of turns and wire diameter of the wound coil are checked, and the tensioner is adjusted according to the test results.

[0048] S7. Place interlayer DMD insulating paper on the first layer coil, overlap the joint by 30mm and then raise the layer. Bend a small S-shape at the raising position and put a DMD insulating paper with a specification of 0.2mm×40mm×100mm at the raising cut. Then start winding the second layer. The specific winding process of the second layer is the same as step five.

[0049] S8. After a section of the coil is wound, measure the outer diameter of the coil wire and the total number of turns, tighten the end of the coil, and then use a layer of glass fiber cloth tape with a specification of 0.3mm×70mm to fix the coil.

[0050] S9. The coil is divided into four sections. After completing the process of the first section, repeat steps five to eight to wind the remaining three sections of the coil. The filling method between sections is as follows: use 1.2mm (recommended value or other similar thickness) mesh cloth cut into pieces of appropriate size, and then stack them to a thickness equal to the distance between sections. Two positioning mesh pieces need to be added on both sides, and then the mesh cloth is tied into a whole. Positioning blocks are placed along the circumferential direction between each section for support.

[0051] S10. Winding of coils with air passages: The inner part of the air passage is wound into four sections according to steps one to eight. Then, an insulating layer is wrapped around it. The outer layer is wound with a 0.3mm×70mm glass fiber cloth tape and tied into a figure-eight shape with glass fiber cloth. The air passage plate wrapped with reinforced glass fiber cloth is placed into the fixing groove and the air passages are filled with continuous felt. Then, the outer insulating layer of the air passage plate is wrapped and the outer four sections of coils are wound according to steps one to eight.

[0052] S11. Place a mesh cloth outside the air duct plate. It should be centered in the coil size, with the upper end extending about 3mm beyond the end of the formed coil, or the edge of the upper mesh strip should be flush with the end of the coil to ensure that the end of the coil is fully protected and to prevent splicing defects. Place a 0.1mm release film inside and outside the air duct, with the concave and convex surfaces having the same size. Remove the coil and transfer it to the next process.

[0053] In S6, a testing device is used to detect the number of turns and wire diameter of the coil. The testing device includes a frame 1, a testing frame 2 rotatably mounted on the frame 1, two clamping plates 3 slidably mounted on the testing frame 2, a scale 4 raised and lowered on the testing frame 2, a measuring mechanism for detecting the wire diameter, and a verification mechanism for verifying the wire diameter. The testing frame 2 rotates about the axis of the coil. The two clamping plates 3 abut against the beginning and end of the coil, and the distance between the two clamping plates 3 is equal to the total length of the coil. The movement of the clamping plates 3 on the testing frame 2 is achieved by an electric actuator or a cylinder, and the two clamping plates 3 need to move synchronously. The rotation of the testing frame 2 is achieved by a motor. The axis of rotation of the testing frame 2 on the frame 1 is collinear with the axis of the coil. The scale 4 is marked with graduations. For ease of measurement, both sides of the scale 4 can be... The scale is set, and the movement of the scale 4 is also achieved by an electric actuator or a cylinder. The movement direction of the scale 4 is perpendicular to the length direction of the coil. When it is necessary to detect the length of the coil, it is only necessary to control the two clamping plates 3 to move towards the coil, and it is necessary to ensure that the clamping plates 3 are in a vertical state and that the two clamping plates 3 are respectively attached to the two ends of the coil. Then move the scale 4 to abut against the ends of the two clamping plates 3. The scale 4 is always in a horizontal state. At this time, the length of the coil can be read. According to the set or standard coil turns, the wire diameter of the coil can be obtained. Therefore, the standard value of the wire diameter can be obtained here. Then, the actual measured data is compared with the standard wire diameter to determine whether there is a problem with the winding. If the wire diameter is greater than the standard value, the tension needs to be increased; if the wire diameter is less than the standard value, the tension needs to be decreased.

[0054] The measuring mechanism includes a measuring frame 5 slidably mounted on a clamping plate 3, a measuring block 6 slidably mounted on the measuring frame 5, a measuring needle 7 elastically mounted on the measuring block 6, and a marking component for marking the wire diameter. The measuring frame 5 moves along the length of the coil, and the measuring block 6 moves along the radial direction of the coil. The clamping plate 3 has a through hole for the measuring frame 5 to pass through. The movement of the measuring frame 5 on the clamping plate 3 and the movement of the measuring block 6 on the measuring frame 5 can be achieved by an electric actuator or a cylinder. The measuring block 6 has a measuring hole, and the measuring needle 7 slides into the measuring hole. A limiting block is fixedly connected to the side wall of the measuring needle 7. A limiting groove is provided on the side wall of the measuring hole, and the two ends of the limiting groove are closed. The limiting block and the corresponding... A spring is fixedly connected between the inner walls of the limiting groove end. The tip of the measuring needle 7 abuts against the outer peripheral wall of the coil. First, the measuring frame 5 is slid out of the through hole until the measuring needle 7 moves to the position of the first turn of the coil. Then, the measuring block 6 is controlled to move towards the coil. Since the position where the clamping piece 3 abuts is the zero point position of the first turn of the coil, it is only necessary to move the measuring needle 7 to the outer wall that abuts against the first turn of the coil. At this time, the spring is in a compressed state. When the measuring needle 7 moves to the other side of the coil, since there is a gap between the two adjacent turns of the coil, when the measuring needle 7 moves to the position between the two coils, the measuring needle 7 moves towards the coil under the elastic force of the spring. The distance between this point and the clamping piece 3 is the wire diameter.

[0055] The marking assembly includes a marking paper 8 movably mounted on the detection frame 2, a winding section for winding the marking paper 8, a marking needle 13 for marking the wire diameter position, a proximity switch 15, and a marking electric actuator 14. The marking paper 8 moves along the length of the coil. The marking needle 13 and the measuring needle 7 are on the same straight line. The tail end of the measuring needle 7 initially abuts against the proximity switch 15. The proximity switch 15 is electrically connected to the marking electric actuator 14. The marking needle 13 punctures the measuring needle 7. In the initial state, the tail end of the measuring needle 7 abuts against the proximity switch 15. The winding section includes two winding boxes 10, two winding motors, and two winding rollers. 9 and four winding ropes. The winding roller 9 is rotatably set inside the winding box 10. The four winding ropes are divided into two groups. The ends of the four winding ropes are fixedly connected to the four corners of the marking paper 8. The two winding ropes in the same group are fixedly connected to the same winding roller 9. During the movement of the scale 4, the scale 4 passes through the gap between the two winding ropes. During the marking movement, the winding rope is above the scale 4 and the distance between the two winding ropes is greater than the distance between the scale 4. When the wire diameter is measured, the marking paper 8 is always above the scale 4. The winding rope or marking paper 8 can be moved above the scale 4 by the cooperation between the two winding rollers 9.

[0056] The winding box 10 is also equipped with a light source 11 and a light sensor 12. The light source 11 and the light sensor 12 are located on both sides of the label paper 8. The light sensor 12 is electrically connected to a buzzer. The light sensor 12 and the buzzer are connected by a PLC controller. The light source 11 is mainly used to detect the label paper. In this embodiment, the length of the label paper can be set to a long distance or multiple labels 8 can be set. The labels 8 and the winding rope are spaced apart, that is, a new label paper 8 needs to be replaced after each detection. Therefore, the labels 8 need to be detected in advance during the movement of the labels 8 to prevent the labels 8 with holes or the position of the holes on the labels 8 from moving to the position to be detected and affecting the detection results.

[0057] As the spring force acts on the marking needle 13, the tail end of the marking needle 13 separates from the proximity switch 15. The proximity switch 15 triggers the marking electric actuator 14 to work, and the marking electric actuator 14 pushes the marking needle 13 to move. The marking needle 13 and the measuring needle 7 are on the same straight line. Therefore, the position marked by the marking needle 13 on the marking paper 8 is the position of the measuring needle 7. Thus, the wire diameter can be determined based on the position of the clamping piece 3 and the position of the measuring needle 7 on the marking paper 8.

[0058] The verification mechanism includes a verification frame 16 slidably mounted on the detection frame 2, a support 17 slidably mounted on the verification frame 16, a verification plate 18 elastically mounted on the support 17, a reciprocating part for controlling the reciprocating motion of the verification plate 18, and an adjustment component. The adjustment component is used to identify the positions of the verification plate 18 and the marking needle 13 on the marking paper 8. When the scale 4 is in the initial position, the tail end of the verification plate 18 abuts against the scale 4. The verification frame 16 moves in the horizontal direction, but its movement direction is also perpendicular to the length direction of the coil. The support 17 moves along the length direction of the coil, that is, parallel to the movement direction of the scale 4. In the initial state, the verification frame 16 is in a position away from the scale 4 to avoid affecting the movement of the scale 4. The verification plate 18 can calculate the set value of the wire diameter based on the total length of the coil and the set number of turns. Similarly, the distance between the position of the verification plate 18 and the corresponding clamping piece 3 is equal to the above-mentioned set value.

[0059] The reciprocating section includes a reciprocating electric actuator 19, a reciprocating spring 20, a reciprocating block 21, and a reciprocating electromagnet 22. The bracket 17 has an approval hole 24 for the movement of the approval plate 18. A reciprocating groove 23 is provided on the side wall of the approval hole 24, with both ends of the groove open. The reciprocating block 21 slides within the groove 23. One end of the reciprocating spring 20 is fixedly connected to one side of the reciprocating block 21 and the corresponding end of the groove 23. The reciprocating electric actuator 19 is located on the side of the reciprocating block 21 away from the spring. The reciprocating electric actuator 19 controls the movement of the reciprocating electromagnet 22. The reciprocating electromagnet 22 interacts with the reciprocating plate 18. The reciprocating block 21 is attracted; in the initial state, the reciprocating electric push rod 19 attracts the reciprocating block 21. At this time, the reciprocating spring 20 is in the pulling rope state, and the end of the verification plate 18 just abuts against the scale 4. According to the above-set wire diameter standard value, the distance that the verification plate 18 needs to move can be calculated. After the verification plate 18 moves to the designated position, the reciprocating electromagnet 22 is de-energized. Under the elastic force of the reciprocating spring 20, the reciprocating plate moves towards the marking paper 8. Since the marking paper 8 is in a completely taut state, the reciprocating plate and the marking paper 8 fit more tightly.

[0060] At this point, it is necessary to compare the positional relationship between the hole punched by the marker needle 13 on the marker paper 8 and the verification plate 18. In this embodiment, the hole punched by the marker needle 13 on the marker paper 8 is called a marker hole. The adjustment assembly includes an adjustment lamp 25, a color sensor 27, a buzzer electrically connected to the color sensor 27, and a trigger unit. The adjustment lamp 25 is located at one end of the reciprocating plate near the marker paper 8, and the end of the reciprocating plate is provided with an adjustment hole 26 for mounting the adjustment lamp 25. After the color sensor 27 identifies the color of the adjustment lamp 25, it triggers the buzzer to emit a sound. The trigger unit is used to identify the position of the marker needle 13 relative to the position of the verification plate 18. The color sensor 27 also slides on the... On the clamping plate 3, the color sensor 27 and the measuring frame 5 are located on the same clamping plate 3. When the verification plate 18 starts to move, the marking needle 13 has been retracted by the marking electric push rod 14 to avoid affecting the normal movement of the color sensor 27. First, the color sensor 27 is moved to the position of the verification plate 18. If the adjustment lamp 25 of the verification plate 18 is aligned with the marking hole at this time, in this embodiment, the adjustment lamp 25 occupying one-third of the marking hole is considered to coincide with the marking hole. After the light of the adjustment lamp 25 passes through the marking hole, the color sensor 27 recognizes the color of the light of the adjustment lamp 25 and triggers the buzzer to start emitting sound, thereby proving that the wire diameter of the coil meets the standard.

[0061] If the buzzer does not sound, it indicates that the wire diameter does not meet the standard. The trigger unit is needed to determine whether it is too small or too large. The trigger unit includes two trigger plates 28 and two trigger lights 29 of different colors. The two trigger plates 28 are hinged to both sides of the approval plate 18. The approval plate 18 is equipped with a transmission unit for simultaneously controlling the opening or closing of the two trigger plates 28. The trigger plates 28 are hinged to the approval plate 18, and the direction of the hinge axis is along the movement direction of the approval frame 16. The two trigger lights 29 are different colors and also different colors from the adjustment light 25. For ease of explanation in this embodiment, it is set that if the light is too small, it is green, and if it is too large, it is red. The transmission part includes a transmission electric actuator 30, a rack 32, and two gears 31. The gears 31 are rotatably mounted on the approval plate 18. The two gears 31 are located on both sides of the rack 32. The rack 32 is slidably mounted on the approval plate 18. The gears 31 are coaxially fixed with the hinge shaft of the corresponding trigger plate 28. The transmission electric actuator 30 is used to control the reciprocating motion of the rack 32. The color sensor 27 and the transmission electric actuator 30 are connected and controlled by a PLC controller.

[0062] When the color sensor 27 does not detect the lamp tube of the adjustment lamp 25, the transmission electric push rod 30 is triggered, and the rack 32 is pushed downward. The two racks 32 respectively drive the two trigger plates 28 to start unfolding, and the trigger lamp 29 is aligned with the label paper 8. In this embodiment, under the mutual cooperation between the label paper 8 and the trigger lamp 29, the light of the trigger lamp 29 will only shine through the label hole. If the green light trigger lamp 29 corresponds to the label hole, it means that the wire diameter is too small and the tension needs to be reduced. If the red light trigger lamp 29 corresponds to the label hole, it means that the wire diameter is too large and the tension needs to be increased, thus completing the detection and judgment of the wire diameter.

[0063] The implementation principle of the anti-cracking winding process for a high-voltage coil in this application embodiment is as follows: When it is necessary to detect the length of the coil, it is only necessary to control the two clamping plates 3 to move towards the coil, and it is necessary to ensure that the clamping plates 3 are in a vertical state and that the two clamping plates 3 are respectively attached to the two ends of the coil. Then, the scale 4 is moved to abut against the ends of the two clamping plates 3. The scale 4 is always in a horizontal state. At this time, the length of the coil can be read. According to the set or standard coil turns, the wire diameter of the coil can be obtained. Therefore, the standard value of the wire diameter can be obtained here. Then, the actual measured data is compared with the standard wire diameter to determine whether there is a problem with the winding. If the wire diameter is greater than the standard value, the tension needs to be increased; if the wire diameter is less than the standard value, the tension needs to be decreased.

[0064] As the marking needle 13 is under the elastic force of the spring, the tail end of the marking needle 13 separates from the proximity switch 15. The proximity switch 15 triggers the marking electric actuator 14 to work, and the marking electric actuator 14 pushes the marking needle 13 to move. The marking needle 13 and the measuring needle 7 are on the same straight line. Therefore, the position marked by the marking needle 13 on the marking paper 8 is the position of the measuring needle 7. Thus, the wire diameter can be determined based on the position of the clamping piece 3 and the position of the measuring needle 7 on the marking paper 8. The color sensor 27 is moved to the position of the verification plate 18. If the adjustment lamp 25 of the verification plate 18 is aligned with the marking hole at this time, in this embodiment, the adjustment lamp 25 occupying one-third of the marking hole is considered to coincide with the marking hole. After the light of the adjustment lamp 25 passes through the marking hole, the color sensor 27 recognizes the color of the light of the adjustment lamp 25 and triggers the buzzer to start emitting sound, thus proving that the wire diameter of the coil meets the standard.

[0065] When the color sensor 27 does not detect the lamp tube of the adjustment lamp 25, the transmission electric push rod 30 is triggered, and the rack 32 is pushed downward. The two racks 32 respectively drive the two trigger plates 28 to start unfolding, and the trigger lamp 29 is aligned with the label paper 8. In this embodiment, under the mutual cooperation between the label paper 8 and the trigger lamp 29, the light of the trigger lamp 29 will only shine through the label hole. If the green light trigger lamp 29 corresponds to the label hole, it means that the wire diameter is too small and the tension needs to be reduced. If the red light trigger lamp 29 corresponds to the label hole, it means that the wire diameter is too large and the tension needs to be increased, thus completing the detection and judgment of the wire diameter.

[0066] Example 2

[0067] This application discloses a dry-type transformer. A dry-type transformer includes a casing, an iron core, and windings manufactured using the process described in Embodiment 1. The iron core is the core component of the dry-type transformer, its main function being to form a magnetic circuit and increase the transformer's magnetic flux, thereby improving the transformer's efficiency. The windings are the main energy conversion part of the dry-type transformer, generating a magnetic field through current to achieve voltage transformation. The casing is typically made of sheet metal or steel plate, its main function being to protect the internal components of the transformer, such as the iron core and windings, and to provide mechanical support. It also includes other accessories: cooling devices: transformers typically require cooling to ensure their normal operation; common cooling devices include radiators and fans; fasteners and insulation components: these include clamps, screws, glass binding straps, steel binding straps, pads and clamp insulation, insulating tubes and insulating pads, grounding plates and feet, etc., used to fix and insulate the internal components of the transformer; protection devices: depending on specific needs, dry-type transformers may also be equipped with protection devices, such as dehumidifiers, safety vents, gas relays, oil conservators (for some types of transformers), and temperature measuring devices, used to monitor and protect the safe operation of the transformer.

[0068] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A process for anti-cracking winding of a high voltage coil, characterized by: The method comprises the following steps: S1. According to the specification of the coil, a corresponding mold is selected, the mold is clamped on the winding machine, the tail seat is fastened, the locking center is locked, and the rotating speed of the winding machine is adjusted according to the diameter of the wound coil; S2. An identification card is arranged opposite to the wire outlet plate at the bottom of the mold, the distance between the identification card and the upper end of the coil is 100 mm, and a layer of polytetrafluoroethylene tape is wound from the lower end of the coil to the upper end at a distance of 5 mm; S3. The coil is subjected to inner insulation treatment, and the inner insulation treatment specifically comprises the following steps: firstly, a glass cloth tape with a specification of 0.3 mm*70 mm is wound on the inner side of the coil, so that the adjacent turns of the glass cloth tape are not in contact; then, a layer of mesh cloth is arranged on the glass cloth tape, the interface of the mesh cloth is at the wire outlet plate, and the interval between the two end faces of the interface is 5 mm; finally, a layer of glass cloth tape for fixing the mesh cloth is wound on the mesh cloth, the specification of the glass cloth tape is 0.3 mm*70 mm, the thickness of the insulation layer is measured, and the adjacent turns of the glass cloth tape are not in contact; wherein, one end of the mesh cloth is flush with the lower end of the coil, and a gap of 5 mm-8 mm is left at the upper end of the coil; S4. The center line and the segmented line of the wire outlet plate are marked on the inner insulation; S5. According to the winding direction requirement of the coil, the coil is wound starting from the wire segment, and the starting part is fixed on the shaft mold by the glass cloth tape; S6. After the first layer of the coil is wound, the number of turns and the wire diameter of the wound coil are detected, and the tensioner is adjusted according to the detection result; S7. After the first layer of the coil is wound, the number of turns and the wire diameter of the wound coil are detected, and the tensioner is adjusted according to the detection result; S8. After the first layer of the coil is wound, the number of turns and the wire diameter of the wound coil are detected, and the tensioner is adjusted according to the detection result; S9. After the first layer of the coil is wound, the number of turns and the wire diameter of the wound coil are detected, and the tensioner is adjusted according to the detection result; S9. The coil is divided into four segments, after the process of the first segment is completed, steps five to eight are repeated to wind the remaining three segments of the coil; the filling method between the segments is as follows: a mesh cloth with a thickness of 1.2 mm (recommended value or other similar thickness) is cut into appropriate size pieces, then the pieces are stacked into a thickness equal to the distance between the segments, two positioning mesh pieces are added on both sides, then the mesh cloth is bound into a whole, and a positioning block is arranged along the circumferential direction between each segment for support; S10. Air duct coil winding: the inner part of the air duct is wound according to steps one to eight to form four segments, then an insulation layer is wrapped, an outer layer of glass cloth tape with a specification of 0.3 mm*70 mm is wound, the glass cloth is bound into an 8-shaped structure, the air duct plate wrapped with the reinforcing glass cloth is placed into the fixing groove, and the air ducts are filled with continuous felt; then, the outer insulation layer of the air duct plate is wrapped, and the outer four segments of the coil are wound according to steps one to eight. S11, placing a mesh cloth outside the airway plate, which needs to be in the middle of the coil size, the upper end extends about 3mm of the end of the formed coil or the upper end of the mesh belt edge is flush with the coil end, to ensure that the coil end is fully protected and prevent splicing defects, place a 0.1mm release film on the inside and outside of the large airway, the concave and convex sizes are consistent, and the coil is transferred to the next process; The detection device for detecting the number of turns and the wire diameter of the coil in S6 comprises a rack (1), a detection frame (2) rotatably arranged on the rack (1), two clamping pieces (3) slidably arranged on the detection frame (2), a scale (4) arranged on the detection frame (2), a measuring mechanism for detecting the wire diameter, and an approval mechanism for approving the wire diameter; the detection frame (2) is flipped along the axis of the coil, the two clamping pieces (3) are respectively in contact with the first and last ends of the coil, and the distance between the two clamping pieces (3) is equal to the total length of the coil; according to the standard number of turns of the coil, the standard wire diameter of the coil is obtained through the total length of the coil; The measuring mechanism comprises a measuring frame (5) slidably arranged on the clamping piece (3), a measuring block (6) slidably arranged on the measuring frame (5), a measuring needle (7) elastically arranged on the measuring block (6), and a marking assembly for marking the wire diameter, the measuring frame (5) moves along the length direction of the coil, and the measuring block (6) moves along the radial direction of the coil; the marking assembly comprises a marking paper (8) movably arranged on the detection frame (2), a winding part for winding the marking paper (8), a marking needle (13) for marking the position of the wire diameter, a proximity switch (15), and a marking electric push rod (14), the marking paper (8) moves along the length direction of the coil, the marking needle (13) is located on the same straight line as the measuring needle (7), the tail end of the measuring needle (7) is in contact with the proximity switch (15) in the initial state, the proximity switch (15) is electrically connected with the marking electric push rod (14), and the marking needle (13) pierces the marking paper (8) to form a marking hole; the distance between the position of the marking hole and the clamping piece (3) is the measured wire diameter of the coil; The approval mechanism comprises a approval frame (16) slidably arranged on the detection frame (2), a support (17) slidably arranged on the approval frame (16), an approval plate (18) elastically arranged on the support (17), a reciprocating part for controlling the reciprocating movement of the approval plate (18), and an adjusting assembly, the adjusting assembly is used for identifying the positions of the approval plate (18) and the marking needle (13) on the marking paper (8), and the tail end of the approval plate (18) is in contact with the scale (4) when the scale (4) is in the initial position. The adjusting assembly comprises an adjusting lamp (25), a color sensor (27), a buzzer electrically connected with the color sensor (27), and a triggering part. The adjusting lamp (25) is arranged on the approval plate (18) close to one end of the identification paper (8), and the end of the approval plate (18) is provided with an adjusting hole (26) for mounting the adjusting lamp (25). The color sensor (27) triggers the buzzer to emit sound after identifying the color of the adjusting lamp (25). The triggering part is used for identifying the position of the identification needle (13) relative to the position of the approval plate (18). The color sensor (27) also slides on the clamping sheet (3), and the color sensor (27) and the measuring frame (5) are located on the same clamping sheet (3). The triggering part comprises two trigger plates (28) and two trigger lamps (29) of different colors. The two trigger plates (28) are respectively hingedly arranged on the two sides of the approval plate (18). The approval plate (18) is provided with a transmission part for simultaneously controlling the two trigger plates (28) to be unfolded or closed. The distance between the position of the approval plate (18) and the corresponding clamping sheet (3) is equal to the standard wire diameter of the coil. The adjusting lamp (25) of the approval plate (18) is opposite to the identification hole, which proves that the wire diameter of the coil meets the standard. The light of the trigger lamp (29) of different colors passes through the identification hole, which proves that the wire diameter of the coil is too large or too small.

2. A process for preventing cracking of high voltage coil winding as claimed in claim 1 wherein: The reciprocating part comprises a reciprocating electric push rod (19), a reciprocating spring (20), a reciprocating block (21), and a reciprocating electromagnet (22). The support (17) is provided with an approval hole (24) for the movement of the approval plate (18). The side wall of the approval hole (24) is provided with a reciprocating groove (23). The two ends of the reciprocating groove (23) are both open. The reciprocating block (21) slides in the reciprocating groove (23). One end of the reciprocating spring (20) is fixedly connected with one side of the reciprocating block (21) and the corresponding end of the reciprocating groove (23). The reciprocating electric push rod (19) is located on the side of the reciprocating block (21) away from the spring. The reciprocating electric push rod (19) controls the movement of the reciprocating electromagnet (22). The reciprocating electromagnet (22) is adsorbed with the reciprocating block (21).

3. A process for preventing cracking of high voltage coil winding as claimed in claim 2 wherein: The transmission part comprises a transmission electric push rod (30), a gear (31), and two racks (32). The gear (31) is rotatably arranged on the approval plate (18). Two gears (31) are respectively located on the two sides of the rack (32). The rack (32) is slidably arranged on the approval plate (18). The gear (31) is coaxially fixed with the hinge shaft corresponding to the trigger plate (28). The transmission electric push rod (30) is used for controlling the reciprocating movement of the rack (32).

4. A process for preventing cracking of high voltage coil winding as claimed in claim 3 wherein: The winding part comprises two winding boxes (10), two winding motors, two winding rollers (9) and four winding ropes, the winding rollers (9) are rotationally arranged in the winding boxes (10), four winding ropes are divided into two groups, the ends of the four winding ropes are respectively fixedly connected with four corners of the identification paper (8), two winding ropes in the same group are respectively fixedly connected with the same winding roller (9), and the scale (4) passes through the gap between two winding ropes during movement.

5. Dry-type transformer, characterized in that: A winding made by a crack-proof winding process of a high-voltage coil according to any one of claims 1-4 and a core and a housing.

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