Dry-type transformer and anti-cracking winding process of high-voltage coil of dry-type transformer

Abstract

The invention discloses a dry-type transformer and an anti-cracking winding process of a high-voltage coil of the dry-type transformer. A detection device is adopted to detect the number of turns and the wire diameter of the coil. The detection device comprises a rack, a detection frame rotationally arranged on the rack, two clamping pieces arranged on the detection frame in a sliding mode, a scale arranged on the detection frame in a lifting mode, a measuring mechanism used for detecting the wire diameter and an approval mechanism used for approving the wire diameter. The detection frame rotates around the axis where the coil is located, the two clamping pieces abut against the head end and the tail end of the coil respectively, and the distance between the two clamping pieces is equal to the total length of the coil. The winding process has the effect of accurately detecting the number of turns and the wire diameter of the coil, and the coil manufactured through the winding process has the anti-cracking performance.

Description

Technical Field

[0001] The present application relates to the technical field of transformers, and in particular to a dry-type transformer and an anti-cracking winding process for a high-voltage coil thereof. Background Art

[0002] At present, dry-type transformers refer to transformers whose cores and windings are not immersed in insulating oil. They are generally used in local lighting and electronic circuits. Since dry-type transformers do not have oil, there are no problems such as fire, explosion, and pollution. Therefore, electrical specifications and regulations do not require dry-type transformers to be placed in a separate room; therefore, these advantages provide a good guarantee for the widespread application of dry-type transformers.

[0003] In the related technology, a Chinese patent with patent publication number CN103390493A proposes a winding method for a high-voltage coil with filler, which relates to the field of transformer technology. The dielectric strength and partial discharge level are ensured by effective insulation spacing. In the winding process, the uniformity of the wire spacing is ensured to avoid defects such as sharp edges, sharp corners, and burrs formed by welding of wire breakpoints. At the same time, it has the characteristics of high work efficiency and good processing quality.

[0004] Regarding the above-mentioned related technologies, the inventors believe that the following defects exist: after the first layer of coil is wound, the number of coil turns and the coil diameter need to be detected. 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 results in a defect of cumbersome detection. Summary of the invention

[0005] In order to improve the problem of inaccurate detection of coil turns and wire diameter, the present application provides a dry-type transformer and an anti-cracking winding process for its high-voltage coil.

[0006] The present application provides a high-voltage coil anti-cracking winding process using the following technical solutions: A high voltage coil anti-cracking winding process comprises the following steps: S1. Select the corresponding mold according to the specifications of the coil, clamp the mold on the winding car, then tighten the tailstock, lock the top, and adjust the speed of the winding car according to the diameter of the wound coil; S2. An identification card is set opposite to the outlet plate at the bottom of the mold. The distance between the identification card and the upper end of the coil is 100 mm. A layer of polytetrafluoroethylene tape is wound upward from the lower end of the coil with a 5 mm edge pressure. S3. Perform internal insulation treatment on the coil. The internal insulation treatment is specifically as follows: first, wind a layer of glass cloth tape with a specification of 0.3mm×70mm on the inner side of the coil so that adjacent turns of the glass cloth tape do not touch each other; then place a layer of mesh cloth on the glass cloth tape, the interface of the mesh cloth is at the outlet board, and the interval between the two end surfaces of the interface is 5mm; finally, wind a layer of glass cloth tape for fixing the mesh cloth on the mesh cloth, the specification of the glass cloth tape is 0.3mm×70mm, measure the thickness of the insulation layer, and the adjacent turns of the glass cloth tape do not touch each other; wherein: one end of the mesh cloth is flush with the lower end of the coil, and a gap of 5mm-8mm is left at the upper end of the coil; S4. Mark the center line and segment line of the outlet board on the inner insulation; S5. According to the requirements of the coil winding direction, the coil is wound in the order of the line segment winding, and the starting part is fixed on the shaft mold with a glass fiber 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 tested, and the tensioner is adjusted according to the test results; S7. Place interlayer DMD insulation paper on the first layer of coil, overlap 30mm at the joints and then raise the layer, bend a small S shape at the raising position, place a piece of DMD insulation paper with a specification of 0.2mm×40mm×100mm at the shearing edge of the raising layer, and then start winding the second layer. The specific winding process of the second layer is the same as step 5; S8. After a section of coil is wound, measure the outer diameter of the coil wire and the total number of turns, tighten the coil tail, and then wrap a layer of glass fiber cloth tape with a specification of 0.3mm×70mm to fix the coil; S9. The coil is divided into four sections. After completing the process of the first section, repeat steps 5 to 8 to wind the remaining three sections of the coil; filling method between sections: use 1.2mm (recommended value or other similar thickness) mesh cloth to cut into pieces of appropriate size, and then stack them into a thickness equal to the distance between sections. Add 2 positioning mesh sheets on both sides, and then tie them into a whole with mesh cloth. Place positioning blocks for support along the circumferential direction between each section; S10, coil winding with airway: the inner part of the airway is wound in four sections according to steps 1 to 8, and then wrapped with an insulating layer, and a layer of glass cloth with a specification of 0.3mm×70mm is wound on the outer layer, and the glass cloth is tied into an 8-shaped shape, and the airway plate wrapped with the reinforced glass cloth is placed in the fixed groove, and the airways are filled with continuous felt; then the outer insulation layer of the airway plate is wrapped, and four sections of coils on the outer side of the airway are wound according to steps 1 to 8; S11. Place a mesh cloth on the outside of the airway plate. It should be in the middle of the coil size. The upper end should extend about 3mm beyond the end of the formed coil or the edge of the upper mesh belt should be flush with the end of the coil to ensure that the end of the coil is fully protected to prevent splicing defects. Place a 0.1mm release film inside and outside the large airway. The concave and convex surfaces should be the same size. The coil is unloaded and transferred to the next process. In S6, a detection device is used to detect the number of turns and wire diameter of the coil, and the detection device includes a frame, a detection frame rotatably arranged on the frame, two clamping plates slidably arranged on the detection frame, a ruler lifted and lowered on the detection frame, a measuring mechanism for detecting the wire diameter, and an accrediting mechanism for accrediting the wire diameter; the detection frame flips around the axis of the coil, and the two clamping plates are respectively in contact with the head and tail ends of the coil, and the distance between the two clamping plates is equal to the total length of the coil.

[0007] 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 identification component for identifying 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.

[0008] Optionally, the identification component includes an identification paper movably arranged on the detection frame, a winding portion for winding the identification paper, an identification needle for marking the wire diameter position, a proximity switch and an identification electric push rod, the identification paper moves along the length direction of the coil, the identification 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 an initial state, the proximity switch is electrically connected to the identification electric push rod, and the identification needle punctures the identification needle.

[0009] Optionally, the approval mechanism includes an approval frame slidably set on the detection frame, a bracket slidably set on the approval frame, an approval plate elastically set on the bracket, a reciprocating part for controlling the reciprocating motion of the approval plate, and an adjustment component, wherein the adjustment component is used to identify the positions of the approval plate and the marking pin on the marking paper, and when the ruler is in the initial position, the tail end of the approval plate abuts against the ruler.

[0010] Optionally, the reciprocating part includes a reciprocating electric push rod, 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, and the side wall of the approval hole is provided with a reciprocating groove. Both ends of the reciprocating groove 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 push rod is located on the side of the reciprocating block away from the spring. The reciprocating electric push rod controls the movement of the reciprocating electromagnet, and the reciprocating electromagnet is adsorbed to the reciprocating block.

[0011] Optionally, the adjustment component includes an adjustment light, a color sensor, a buzzer electrically connected to the color sensor, and a trigger unit. The adjustment light is arranged at one end of the reciprocating plate close to the identification paper, and the end of the reciprocating plate is provided with an adjustment hole for installing the adjustment light. The color sensor triggers the buzzer to make a sound after identifying the color of the adjustment light. The trigger unit is used to identify the position of the identification needle relative to the position of the approval plate. The color sensor also slides on the clamping plate. The color sensor and the measuring frame are located on the same clamping plate.

[0012] Optionally, the trigger part includes two trigger plates and two trigger lights of different colors, the two trigger plates are hingedly arranged on both sides of the approval plate, and the approval plate is provided with a transmission part for simultaneously controlling the expansion or closure of the two trigger plates.

[0013] Optionally, the transmission part includes a transmission electric push rod, a gear and two racks. The gear is rotatably arranged on the approval plate. The two gears are respectively located on both sides of the rack. The rack is slidably arranged on the approval plate. The gear is coaxially fixed with the hinge shaft corresponding to the trigger plate, and the transmission electric push rod is used to control the reciprocating motion of the rack.

[0014] Optionally, the winding part includes two winding boxes, two winding motors, two winding rollers and four winding ropes. The winding rollers are rotatably arranged in 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.

[0015] The dry-type transformer provided in this application adopts the following technical solution: A dry-type transformer comprises a shell, an iron core and a winding made by the anti-cracking winding process of the high-voltage coil.

[0016] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the coil length needs to be tested, it is only necessary to control the two clamping pieces to move toward the direction of the coil, and it is necessary to ensure that the clamping pieces are in a vertical state, and the two clamping pieces are respectively fitted with the two ends of the coil, and then the ruler is moved to abut against the ends of the two clamping pieces. The ruler is always in a horizontal state. At this time, the length of the coil can be read. According to the number of coil turns set or in accordance with the standard state, the wire diameter of the coil can be obtained. Therefore, the standard value of the wire diameter can be obtained here. Then, according to the actual measured data and the standard comparison of the wire diameter, it is judged whether there is a problem with the winding at this time. If the wire diameter is larger than the standard value, the tension needs to be increased, and if the wire diameter is smaller than the standard value, the tension needs to be reduced; 2. As the marking needle is acted upon by the elastic force of the spring, the tail end of the marking needle is separated from the proximity switch, and the proximity switch triggers the marking electric push rod to work, which pushes the marking needle to move. The marking needle and the measuring needle are in the same straight line, so the position marked by the marking needle on the marking paper is the position of the measuring needle, and the wire diameter can be determined based on the position of the clamping piece to the position of the measuring needle on the marking paper; move the color sensor to the position of the approval plate, and if the adjustment light of the approval plate is facing the marking hole at this time, the marking hole that occupies one-third of the adjustment light in this embodiment is deemed to coincide with the marking hole. After the light of the adjustment light passes through the marking hole, the color sensor recognizes the light color of the adjustment light, triggers the buzzer to start emitting sound, and thus proves that the wire diameter of the coil meets the standard; 3. When the color sensor does not recognize 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 start to unfold. The trigger light is just aligned with the identification paper. In this embodiment, under the cooperation between the identification paper and the trigger light, the light of the trigger light will only shine through the identification hole. If the green light trigger light corresponds to the identification hole, it proves that the wire diameter is too small and the tension needs to be reduced. If the red light trigger light corresponds to the identification hole, it proves that the wire diameter is too large and the tension needs to be increased to complete the detection and judgment of the wire diameter. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present application; Figure 2 yes Figure 1 A magnified schematic diagram of part A; Figure 3 is a schematic diagram of the approval agency in Example 1 of the present application; Figure 4 It is a schematic diagram of the transmission part in the first embodiment of the present application.

[0018] Figure numerals: 1. frame; 2. detection frame; 3. clamping piece; 4. ruler; 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 push rod; 15. proximity switch; 16. approval frame; 17. bracket; 18. approval plate; 19. reciprocating electric push rod; 20. reciprocating spring; 21. reciprocating block; 22. reciprocating electromagnet; 23. reciprocating slot; 24. approval hole; 25. adjustment lamp; 26. adjustment hole; 27. color sensor; 28. trigger plate; 29. ​​trigger lamp; 30. transmission electric push rod; 31. gear; 32. rack. DETAILED DESCRIPTION

[0019] The following is combined with Figure 1-4 This application is described in further detail.

[0020] Embodiment 1

[0021] The present application embodiment discloses a high voltage coil anti-cracking winding process. Figure 1-Figure 4 A high voltage coil anti-cracking winding process comprises the following steps: S1. Select the corresponding mold according to the specifications of the coil, clamp the mold on the winding car, then tighten the tailstock, lock the top, and adjust the speed of the winding car according to the diameter of the wound coil; S2. An identification card is set opposite to the outlet plate at the bottom of the mold. The distance between the identification card and the upper end of the coil is 100 mm. A layer of polytetrafluoroethylene tape is wound upward from the lower end of the coil with a 5 mm edge pressure. S3. Perform internal insulation treatment on the coil, and the internal insulation treatment is specifically as follows: first, wind a layer of glass fiber cloth tape with a specification of 0.3mm×70mm on the inner side of the coil, so that adjacent turns of the glass fiber cloth tape do not touch each other; then place a layer of mesh cloth on the glass fiber cloth tape, the interface of the mesh cloth is at the outlet board, and the interval between the two end surfaces of the interface is 5mm; finally, wind a layer of glass fiber cloth tape for fixing the mesh cloth on the mesh cloth, the specification of the glass fiber cloth tape is 0.3mm×70mm, measure the thickness of the insulation layer, and the adjacent turns of the glass fiber cloth tape do not touch each other; wherein: one end of the mesh cloth is flush with the lower end of the coil, and a gap of 5mm-8mm is left at the upper end of the coil; S4. Mark the center line and segment line of the outlet board on the inner insulation; S5. According to the requirements of the coil winding direction, the coil is wound in the order of the line segment winding, and the starting part is fixed on the shaft mold with a glass fiber 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 tested, and the tensioner is adjusted according to the test results; S7. Place interlayer DMD insulation paper on the first layer of coil, overlap 30mm at the joints and then raise the layer, bend a small S shape at the raising position, place a piece of DMD insulation paper with a specification of 0.2mm×40mm×100mm at the shearing edge of the raising layer, and then start winding the second layer. The specific winding process of the second layer is the same as step 5; S8. After a section of coil is wound, measure the outer diameter of the coil wire and the total number of turns, tighten the coil tail, and then wrap a layer of glass fiber cloth tape with a specification of 0.3mm×70mm to fix the coil; S9. The coil is divided into four sections. After completing the process of the first section, repeat steps 5 to 8 to wind the remaining three sections of the coil; filling method between sections: use 1.2mm (recommended value or other similar thickness) mesh cloth to cut into pieces of appropriate size, and then stack them into a thickness equal to the distance between sections. Add 2 positioning mesh sheets on both sides, and then tie them into a whole with mesh cloth. Place positioning blocks for support along the circumferential direction between each section; S10, coil winding with airway: the inner part of the airway is wound in four sections according to steps 1 to 8, and then wrapped with an insulating layer, and a layer of glass cloth with a specification of 0.3mm×70mm is wound on the outer layer, and the glass cloth is tied into an 8-shaped shape, and the airway plate wrapped with the reinforced glass cloth is placed in the fixed groove, and the airways are filled with continuous felt; then the outer insulation layer of the airway plate is wrapped, and four sections of coils on the outer side of the airway are wound according to steps 1 to 8; S11. Place a mesh cloth on the outside of the airway plate. It should be in the middle of the coil size. The upper end should extend about 3mm beyond the end of the formed coil or the edge of the upper mesh belt should be flush with the end of the coil to ensure that the end of the coil is fully protected to prevent splicing defects. Place a 0.1mm release film inside and outside the large airway. The concave and convex surfaces should be the same size. The coil is unloaded and transferred to the next process. In S6, a detection device is used to detect the number of turns and wire diameter of the coil. The detection device includes a frame 1, a detection frame 2 rotatably set on the frame 1, two clamping pieces 3 slidably set on the detection frame 2, a scale 4 lifted and lowered on the detection frame 2, a measuring mechanism for wire diameter detection, and an accreditation mechanism for accrediting the wire diameter; the detection frame 2 flips around the axis where the coil is located, and the two clamping pieces 3 are respectively in contact with the head and tail ends of the coil, and the distance between the two clamping pieces 3 is equal to the total length of the coil. The movement of the clamping pieces 3 on the detection frame 2 is achieved by an electric push rod or a cylinder, and the two clamping pieces 3 need to maintain synchronous movement, and the rotation of the detection frame 2 is achieved by a motor. The axis of rotation of the detection frame 2 on the frame 1 is colinear with the axis where the coil is located. The scale 4 is provided with scales. For the convenience of measurement, both sides of the scale 4 can be To set the scale, the movement of the ruler 4 is also achieved by an electric push rod or a cylinder, and the movement direction of the ruler 4 is perpendicular to the length direction of the coil; when the coil length needs to be detected, it is only necessary to control the two clamping pieces 3 to move toward the direction of the coil, and it is necessary to ensure that the clamping pieces 3 are in a vertical state, and the two clamping pieces 3 are respectively fitted with the two ends of the coil, and then the ruler 4 is moved to abut against the ends of the two clamping pieces 3, and the ruler 4 is always in a horizontal state. At this time, the length of the coil can be read, and the wire diameter of the coil can be obtained according to the number of turns of the coil that is set or meets the standard state. Therefore, the standard value of the wire diameter can be obtained here, and then the actual measured data is compared with the wire diameter standard to determine whether there is a problem with the winding. If the wire diameter is larger than the standard value, the tension needs to be increased, and if the wire diameter is smaller than the standard value, the tension needs to be reduced.

[0022] The measuring mechanism includes a measuring frame 5 slidably arranged on the clamping sheet 3, a measuring block 6 slidably arranged on the measuring frame 5, a measuring needle 7 elastically arranged on the measuring block 6, and an identification component 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 clamping sheet 3 is provided with a through hole for the measuring frame 5 to pass through. The movement of the measuring frame 5 on the clamping sheet 3 and the movement of the measuring block 6 on the measuring frame 5 can be achieved by an electric push rod or a cylinder. The measuring block 6 is provided with a measuring hole, and the measuring needle 7 is slidably adapted in the measuring hole. The side wall of the measuring needle 7 is fixedly connected with a limiting block, and the side wall of the measuring hole is provided with a limiting groove. The two ends of the limiting groove are closed, and the limiting block is connected to the corresponding A spring is fixedly connected between the inner walls at the end of the limiting groove, and 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, and then the measuring block 6 is controlled to move toward the coil. Because 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 abutting 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, there is a gap between the two adjacent turns of the coil. Therefore, when the measuring needle 7 moves to the position between the two coils, the measuring needle 7 moves toward the coil under the elastic force of the spring. The distance here to the clamping piece 3 is the size of the wire diameter.

[0023] The marking assembly includes 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 wire diameter position, 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 and the measuring needle 7 are located on the same straight line. The tail end of the measuring needle 7 abuts against the proximity switch 15 in the initial state. The proximity switch 15 is electrically connected to the marking electric push rod 14. The marking needle 13 pierces the marking needle 13. In the initial state, the tail end of the measuring needle 7 abuts against the proximity switch 15. The winding part includes two winding boxes 10, two winding motors, and two winding rollers. 9 and four winding ropes, the winding roller 9 is rotatably arranged in the winding box 10, 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 8, and the two winding ropes in the same group are respectively fixedly connected to the same winding roller 9. During the movement of the ruler 4, the ruler 4 passes through the gap between the two winding ropes; during the marking movement, the winding rope is above the ruler 4 and the distance between the two winding ropes is greater than the distance between the ruler 4, and when the wire diameter is measured, the marking paper 8 is always located above the ruler 4, and the winding rope or the marking paper 8 can be moved above the ruler 4 through the mutual cooperation between the two winding rollers 9.

[0024] A light source 11 and a light sensor 12 are also provided in the winding box 10. The light source 11 and the light sensor 12 are respectively located on both sides of the marking paper 8. The light sensor 12 is electrically connected to a buzzer. The light sensor 12 and the buzzer are controlled by a PLC controller. The light source 11 is mainly used to detect the marking paper. In this embodiment, the length of the marking paper can be set to a long distance or the marking paper 8 can be set to multiple. The marking paper 8 and the winding rope are set at intervals, that is, a new marking paper 8 needs to be replaced after each detection is completed; therefore, the marking paper 8 needs to be detected in advance during the movement of the marking paper 8, so as to prevent the marking paper 8 with a hole or the position of the hole on the marking paper 8 from moving to the position to be detected, affecting the detection result.

[0025] As the marking needle 13 is acted upon by the elastic force of the spring, the tail end of the marking needle 13 is separated from the proximity switch 15, and the proximity switch 15 triggers the marking electric push rod 14 to work. The marking electric push rod 14 pushes the marking needle 13 to move, and the marking needle 13 and the measuring needle 7 are in 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, and the wire diameter can be determined based on the position of the clamping piece 3 to the position of the measuring needle 7 on the marking paper 8.

[0026] The approval mechanism includes an approval frame 16 slidably arranged on the detection frame 2, a bracket 17 slidably arranged on the approval frame 16, an approval plate 18 elastically arranged on the bracket 17, a reciprocating part for controlling the reciprocating motion of the approval plate 18 and an adjustment component, the adjustment component is used to identify the positions of the approval plate 18 and the identification needle 13 on the identification paper 8, and the tail end of the approval plate 18 abuts against the scale 4 when the scale 4 is in the initial position; the direction of movement of the approval frame 16 is along the horizontal direction, but its movement direction is also perpendicular to the length direction of the coil, and the bracket 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 approval frame 16 is in a position away from the scale 4 to avoid affecting the movement of the scale 4. The approval plate 18 can calculate the set value of the wire diameter according to the total length of the coil and the set number of turns. Similarly, the distance between the position of the approval plate 18 and the corresponding clamping piece 3 is equal to the above-mentioned set value.

[0027] The reciprocating part includes a reciprocating electric push rod 19, a reciprocating spring 20, a reciprocating block 21 and a reciprocating electromagnet 22. The bracket 17 is provided with an approval hole 24 for approving the movement of the approval plate 18. The side wall of the approval hole 24 is provided with a reciprocating groove 23. Both ends of the reciprocating groove 23 are open. The reciprocating block 21 slides in the reciprocating 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 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 and the reciprocating electromagnet 22 are connected to the reciprocating spring 20. The reciprocating block 21 is adsorbed; in the initial state, the reciprocating electric push rod 19 adsorbs the reciprocating block 21. At this time, the reciprocating spring 20 is in the pulling rope state, and the end of the approval plate 18 just abuts against the scale 4. According to the standard value of the wire diameter set above, the distance that the approval plate 18 needs to move can be calculated. When the approval plate 18 moves to the specified position, the reciprocating electromagnet 22 is powered off. Under the elastic force of the reciprocating spring 20, the reciprocating plate moves toward the direction of the marking paper 8. Since the marking paper 8 is in a completely stretched state, the reciprocating plate and the marking paper 8 fit more closely.

[0028] At this time, it is necessary to compare the positional relationship between the hole punched by the identification needle 13 on the identification paper 8 and the approval plate 18. In this embodiment, the hole punched by the identification needle 13 on the identification paper 8 is called an identification hole. The adjustment component includes an adjustment light 25, a color sensor 27, a buzzer electrically connected to the color sensor 27, and a trigger part. The adjustment light 25 is arranged at one end of the reciprocating plate close to the identification paper 8, and an adjustment hole 26 for installing the adjustment light 25 is arranged at the end of the reciprocating plate. After the color sensor 27 recognizes the color of the adjustment light 25, the buzzer is triggered to emit a sound. The trigger part is used to identify the position of the identification needle 13 relative to the position of the approval plate 18, and the color sensor 27 also slides at On the clamping plate 3, the color sensor 27 and the measuring frame 5 are located on the same clamping plate 3; when the approval plate 18 starts to move, the identification needle 13 has been retracted by the identification electric push rod 14 to prevent it from affecting the normal movement of the color sensor 27. First, the color sensor 27 is moved to the position of the approval plate 18. If the adjustment light 25 of the approval plate 18 is aligned with the identification hole at this time, the adjustment light 25 in this embodiment occupies one-third of the identification hole, which is deemed to coincide with the identification hole. After the light of the adjustment light 25 passes through the identification hole, the color sensor 27 recognizes the light color of the adjustment light 25, triggers the buzzer to start emitting sound, and then proves that the wire diameter of the coil meets the standard.

[0029] If the buzzer does not make a sound, it proves that the wire diameter does not meet the standard. It is necessary to use the trigger unit 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 respectively hinged on both sides of the approval plate 18. The approval plate 18 is provided with a transmission part for simultaneously controlling the expansion or closure of the two trigger plates 28. The trigger plate 28 is hinged to the approval plate 18 and the direction of the hinge axis is set along the movement direction of the approval frame 16. The colors of the two trigger lights 29 are different and are also different from the color of the adjustment light 25. For the sake of convenience in explanation, in this embodiment, it is set that if it is too small, a green light is turned on, and if it is too large, a red light is turned on; the transmission part includes a transmission electric push rod 30, a rack 32 and two gears 31, the gear 31 is rotatably set on the approval plate 18, the two gears 31 are respectively located on both sides of the rack 32, the rack 32 is slidably set on the approval plate 18, the gear 31 is coaxially fixed with the hinge shaft of the corresponding trigger plate 28, the transmission electric push rod 30 is used to control the reciprocating motion of the rack 32, and the color sensor 27 is connected to the transmission electric push rod 30 through a PLC controller.

[0030] When the color sensor 27 does not recognize the lamp tube of the adjustment lamp 25, the transmission electric push rod 30 is triggered, the rack 32 is pushed downward, and the two racks 32 respectively drive the two trigger plates 28 to start to unfold, and the trigger lamp 29 is just aligned with the identification paper 8. In this embodiment, under the mutual cooperation between the identification paper 8 and the trigger lamp 29, the light of the trigger lamp 29 will only penetrate from the identification hole. If the trigger lamp 29 with a green light corresponds to the identification hole, it proves that the wire diameter is too small and the tensioning force needs to be reduced. If the trigger lamp 29 with a red lamp tube corresponds to the identification hole, it proves that the wire diameter is too large and the tensioning force needs to be increased to complete the detection and judgment of the wire diameter.

[0031] The implementation principle of the anti-cracking winding process of a high-voltage coil in the embodiment of the present application is: when the coil length needs to be detected, it is only necessary to control the two clamping pieces 3 to move toward the direction of the coil, and it is necessary to ensure that the clamping pieces 3 are in a vertical state, and the two clamping pieces 3 are respectively fitted with the two ends of the coil, and then the ruler 4 is moved to abut against the ends of the two clamping pieces 3, and the ruler 4 is always in a horizontal state. At this time, the length of the coil can be read, and the wire diameter of the coil can be obtained according to the number of coil turns that is set or meets the standard state. Therefore, the standard value of the wire diameter can be obtained here, and then the actual measured data is compared with the wire diameter standard to determine whether there is a problem with the winding. If the wire diameter is larger than the standard value, the tension needs to be increased, and if the wire diameter is smaller than the standard value, the tension needs to be reduced.

[0032] As the marking pin 13 is acted upon by the elastic force of the spring, the tail end of the marking pin 13 is separated from the proximity switch 15, and the proximity switch 15 triggers the marking electric push rod 14 to work, and the marking electric push rod 14 pushes the marking pin 13 to move. The marking pin 13 and the measuring pin 7 are on the same straight line, so the position marked by the marking pin 13 on the marking paper 8 is the position of the measuring pin 7, and then the wire diameter size can be judged according to the position of the clamping piece 3 to the position of the measuring pin 7 on the marking paper 8; the color sensor 27 is moved to the position of the approval plate 18, and if the adjustment light 25 of the approval plate 18 is aligned with the marking hole at this time, the marking hole that occupies one-third of the adjustment light 25 in this embodiment is deemed to coincide with the marking hole, and after the light of the adjustment light 25 passes through the marking hole, the color sensor 27 recognizes the light color of the adjustment light 25, triggers the buzzer to start emitting a sound, and then proves that the wire diameter of the coil meets the standard.

[0033] When the color sensor 27 does not recognize the lamp tube of the adjustment lamp 25, the transmission electric push rod 30 is triggered, the rack 32 is pushed downward, and the two racks 32 respectively drive the two trigger plates 28 to start to unfold, and the trigger lamp 29 is just aligned with the identification paper 8. In this embodiment, under the mutual cooperation between the identification paper 8 and the trigger lamp 29, the light of the trigger lamp 29 will only penetrate from the identification hole. If the trigger lamp 29 with a green light corresponds to the identification hole, it proves that the wire diameter is too small and the tensioning force needs to be reduced. If the trigger lamp 29 with a red lamp tube corresponds to the identification hole, it proves that the wire diameter is too large and the tensioning force needs to be increased to complete the detection and judgment of the wire diameter.

[0034] Embodiment 2

[0035] The embodiment of the present application discloses a dry-type transformer. A dry-type transformer includes a housing, an iron core, and a winding made by the production process in the first embodiment. The iron core is the core component of the dry-type transformer, and its main function is to form a magnetic circuit and increase the magnetic flux of the transformer, thereby improving the efficiency of the transformer; the winding is the main energy conversion part of the dry-type transformer, which generates a magnetic field through current to achieve voltage conversion. The housing is usually made of iron sheet or steel plate, and its main function is to protect the internal components of the transformer, such as the iron core and winding, and provide mechanical support. Of course, other accessories are also included, cooling device: the transformer usually needs to be cooled to ensure its normal operation. Common cooling devices include radiators and fans; fasteners and insulating parts: including clamps, screws, glass binding tape, steel binding tape, pads and clamp insulation, insulating tubes and insulating pads, grounding plates and pads and other accessories, which are used to fix and insulate the internal components of the transformer; protective devices: according to specific needs, dry-type transformers may also be equipped with protective devices, such as desiccant, safety airway, gas relay, oil storage cabinet (for certain types of transformers) and temperature measuring devices, etc., which are used to monitor and protect the safe operation of the transformer.

[0036] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A crack-proof winding process for a high-voltage coil, characterized in that: The steps include: S1. Select the corresponding mold according to the specifications of the coil, clamp the mold on the winding car, then tighten the tailstock, lock the top, and adjust the speed of the winding car according to the diameter of the wound coil; S2. An identification card is set opposite to the outlet plate at the bottom of the mold. The distance between the identification card and the upper end of the coil is 100 mm. A layer of polytetrafluoroethylene tape is wound upward from the lower end of the coil with a 5 mm edge pressure. S3. Perform internal insulation treatment on the coil. The internal insulation treatment is specifically as follows: first, wind a layer of glass cloth tape with a specification of 0.3mm×70mm on the inner side of the coil so that adjacent turns of the glass cloth tape do not touch each other; then place a layer of mesh cloth on the glass cloth tape, the interface of the mesh cloth is at the outlet board, and the interval between the two end surfaces of the interface is 5mm; finally, wind a layer of glass cloth tape for fixing the mesh cloth on the mesh cloth, the specification of the glass cloth tape is 0.3mm×70mm, measure the thickness of the insulation layer, and the adjacent turns of the glass cloth tape do not touch each other; wherein: one end of the mesh cloth is flush with the lower end of the coil, and a gap of 5mm-8mm is left at the upper end of the coil; S4. Mark the center line and segment line of the outlet board on the inner insulation; S5. According to the requirements of the coil winding direction, the coil is wound in the order of the line segment winding, and the starting part is fixed on the shaft mold with a glass fiber 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 tested, and the tensioner is adjusted according to the test results; S7. Place interlayer DMD insulation paper on the first layer of coil, overlap 30mm at the joints and then raise the layer, bend a small S shape at the raising position, place a piece of DMD insulation paper with a specification of 0.2mm×40mm×100mm at the shearing edge of the raising layer, and then start winding the second layer. The specific winding process of the second layer is the same as step 5; S8. After a section of coil is wound, measure the outer diameter of the coil wire and the total number of turns, tighten the coil tail, and then wrap a layer of glass fiber cloth tape with a specification of 0.3mm×70mm to fix the coil; S9. The coil is divided into four sections. After completing the process of the first section, repeat steps 5 to 8 to wind the remaining three sections of the coil; filling method between sections: use 1.2mm (recommended value or other similar thickness) mesh cloth to cut into pieces of appropriate size, and then stack them into a thickness equal to the distance between sections. Add 2 positioning mesh sheets on both sides, and then tie them into a whole with mesh cloth. Place positioning blocks for support along the circumferential direction between each section; S10, coil winding with airway: the inner part of the airway is wound in four sections according to steps 1 to 8, and then wrapped with an insulating layer, and a layer of glass cloth with a specification of 0.3mm×70mm is wound on the outer layer, and the glass cloth is tied into an 8-shaped shape, and the airway plate wrapped with the reinforced glass cloth is placed in the fixed groove, and the airways are filled with continuous felt; then the outer insulation layer of the airway plate is wrapped, and four sections of coils on the outer side of the airway are wound according to steps 1 to 8; S11. Place a mesh cloth on the outside of the airway plate. It should be in the middle of the coil size. The upper end should extend about 3mm beyond the end of the formed coil or the edge of the upper mesh belt should be flush with the end of the coil to ensure that the end of the coil is fully protected to prevent splicing defects. Place a 0.1mm release film inside and outside the large airway. The concave and convex surfaces should be the same size. The coil is unloaded and transferred to the next process. In S6, a detection device is used to detect the number of turns and wire diameter of the coil, the detection device comprising a frame (1), a detection frame (2) rotatably arranged on the frame (1), two clamping pieces (3) slidably arranged on the detection frame (2), a scale (4) lifted and lowered on the detection frame (2), a measuring mechanism for detecting the wire diameter, and an accreditation mechanism for accrediting the wire diameter; the detection frame (2) is turned around the axis of the coil, the two clamping pieces (3) are respectively in contact with the head and tail ends of the coil, and the distance between the two clamping pieces (3) is equal to the total length of the coil.

2. The anti-cracking winding process for a high voltage coil according to claim 1, characterized in that: The measuring mechanism comprises a measuring frame (5) slidably arranged on the clamping sheet (3), a measuring block (6) slidably arranged on the measuring frame (5), a measuring needle (7) elastically arranged on the measuring block (6), and an identification component for identifying 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.

3. The anti-cracking winding process of a high-voltage coil according to claim 2 is characterized in that: The marking component comprises a marking paper (8) movably arranged on the detection frame (2), a winding portion for winding the marking paper (8), a marking needle (13) for marking the wire diameter position, 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) and the measuring needle (7) are located on the same straight line; the tail end of the measuring needle (7) abuts against the proximity switch (15) in an initial state; the proximity switch (15) is electrically connected to the marking electric push rod (14); and the marking needle (13) pierces the marking needle (13).

4. The anti-cracking winding process of a high-voltage coil according to claim 3 is characterized in that: The verification mechanism comprises a verification frame (16) slidably arranged on the detection frame (2), a bracket (17) slidably arranged on the verification frame (16), a verification plate (18) elastically arranged on the bracket (17), a reciprocating portion for controlling the reciprocating motion of the verification plate (18), and an adjustment component, wherein the adjustment component is used to identify the positions of the verification plate (18) and the marking needle (13) on the marking paper (8), and when the scale (4) is in the initial position, the rear end of the verification plate (18) abuts against the scale (4).

5. The anti-cracking winding process of a high-voltage coil according to claim 4 is characterized in that: The reciprocating part comprises a reciprocating electric push rod (19), a reciprocating spring (20), a reciprocating block (21) and a reciprocating electromagnet (22); the bracket (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); both ends of the reciprocating groove (23) are open; the reciprocating block (21) slides in the reciprocating 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 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); and the reciprocating electromagnet (22) is adsorbed on the reciprocating block (21).

6. The anti-cracking winding process for a high voltage coil according to claim 5, characterized in that: The adjustment component comprises an adjustment light (25), a color sensor (27), a buzzer electrically connected to the color sensor (27), and a trigger unit. The adjustment light (25) is arranged at one end of the reciprocating plate close to the identification paper (8), and the end of the reciprocating plate is provided with an adjustment hole (26) for mounting the adjustment light (25). The color sensor (27) triggers the buzzer to emit a sound after identifying the color of the adjustment light (25). The trigger unit is used to identify 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 plate (3). The color sensor (27) and the measuring frame (5) are located on the same clamping plate (3).

7. The anti-cracking winding process of a high voltage coil according to claim 6 is characterized in that: The triggering part comprises two triggering plates (28) and two triggering lights (29) of different colors. The two triggering plates (28) are respectively hingedly arranged on both sides of the approval plate (18). The approval plate (18) is provided with a transmission part for simultaneously controlling the two triggering plates (28) to be unfolded or closed.

8. The anti-cracking winding process for a high voltage coil according to claim 7, characterized in that: 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); the two gears (31) are respectively located on both sides of the rack (32); the rack (32) is slidably arranged on the approval plate (18); the gear (31) is coaxially fixed with a hinge shaft corresponding to the trigger plate (28); and the transmission electric push rod (30) is used to control the reciprocating motion of the rack (32).

9. The anti-cracking winding process of a high voltage coil according to claim 3, characterized in that: The winding part comprises two winding boxes (10), two winding motors, two winding rollers (9) and four winding ropes. The winding rollers (9) are rotatably arranged in the winding boxes (10). 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 (8). The two winding ropes in the same group are respectively fixedly connected to the same winding roller (9). During the movement of the ruler (4), the ruler (4) passes through the gap between the two winding ropes.

10. A dry-type transformer, characterized in that: The invention comprises a shell, an iron core and a winding made by the anti-cracking winding process of the high-voltage coil according to any one of claims 1 to 9.

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