Low-voltage current transformer production equipment and process

Abstract

The invention provides low-voltage current transformer production equipment and a low-voltage current transformer production process, belongs to the technical field of current transformer production, and solves the technical problems of poor production adaptability and low production efficiency caused by incapability of automatically winding an annular coil in the prior art. Low-voltage current transformer production equipment comprises a base, a pair of supporting rods are fixed to the base, a winding table is connected between the two supporting rods in a sliding mode, a pair of framework fixing bases are connected to the top face of the winding table in a sliding mode, clamping frames are arranged on the two framework fixing bases in a sliding mode, and a first limiting cylinder is connected to the winding table in a sliding mode; the first limiting cylinder is provided with a second limiting cylinder, the first limiting cylinder and the second limiting cylinder are each provided with a limiting assembly, and the side face of the first limiting cylinder and the side face of the second limiting cylinder are each provided with an arc track combined into a circle. The annular coil winding device has the advantages that the annular coils are wound, the overall production efficiency is improved, and the wound annular coils are stacked and stored.

Description

Technical Field

[0001] This invention belongs to the field of current transformer manufacturing technology, and relates to a current transformer manufacturing equipment and process, particularly a low-voltage current transformer manufacturing equipment and process. Background Technology

[0002] Instrument transformers, also known as instrument transformers, are a general term for current transformers and voltage transformers. They can transform high voltage into low voltage and large current into small current for measurement or protection systems. Their main function is to transform high voltage or large current into standard low voltage or standard small current in a proportional manner, so as to realize the standardization and miniaturization of measuring instruments, protection equipment and automatic control equipment. At the same time, instrument transformers can also be used to isolate high voltage systems to ensure the safety of personnel and equipment.

[0003] A search revealed, for example, a Chinese patent document that discloses a coil winding machine for producing current transformers [Application No.: 202510155362.6; Publication No.: CN 119993733 A]. A coil winding machine for producing current transformers relates to the field of current transformer manufacturing technology. This coil winding machine, when winding the coil onto the winding roller, uses a clamping spring and a clamping roller to press the copper wire firmly during winding, preventing the copper wire from loosening on the winding roller. When the required number of coils is reached, the clamping roller moves upward. Through the cooperation of a bending block and a limiting block, the limiting block moves out of the ring, releasing the ring's restriction. Because the pushing spring is compressed, the ring pushes the rotating disk out of the protrusion block. The protrusion block stops driving the rotating disk to rotate, causing the winding roller to stop rotating and cease winding operations. This prevents continued winding from exceeding the specified number of copper coils on the winding roller, leading to core saturation of the current transformer and affecting its normal operation.

[0004] While this patent can prevent the copper wire from loosening on the winding roller, existing conventional electromagnetic coils are mostly toroidal coils, and this patent cannot wind toroidal coils, resulting in poor production adaptability and low production efficiency. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a low-voltage current transformer production equipment and process. The technical problem to be solved by this invention is: how to realize the winding of toroidal coils, improve overall production efficiency, and stack and store the wound toroidal coils.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A low-voltage current transformer production equipment includes a base, a pair of support rods fixed on the base, and a winding table slidably connected between the two support rods. A pair of frame fixing seats are slidably connected to the top surface of the winding table. Clamping frames are slidably mounted on both frame fixing seats. A first limiting cylinder is slidably connected to the winding table, and a second limiting cylinder is mounted on the first limiting cylinder. Both the first and second limiting cylinders are equipped with limiting components. Arc tracks forming a circle are opened on the sides of both the first and second limiting cylinders. Winding frames are slidably mounted on both arc tracks. Racks are fixed inside both arc tracks, and drive gears are rotatably connected to the winding frames. The drive gears mesh with the racks to wind the wire. A servo motor is fixed inside the wire frame. The output shaft of the servo motor is coaxially fixedly connected to the drive gear. A pair of stabilizing wheels are rotatably connected to the wire frame. The wheel surfaces of the two stabilizing wheels are in contact with the arc track. A loading slot is opened on the wire frame. A mounting plate is rotatably connected in the loading slot. A fastener is coaxially fixed at the axis of the mounting plate. A wire reel is set on the mounting plate. The wire reel and the fastener are engaged. A ring-shaped magnetic core is placed on the two frame fixing seats and the limiting cylinder. A connection hole is opened on the environmental frame. One end of the wire on the wire reel is engaged with the connection hole. A loading storage cylinder is set at the top of the two support rods. A loading assembly is set at the bottom of the loading storage cylinder.

[0008] The working principle of this invention is as follows: A ring-shaped magnetic core is placed on two frame fixing seats and a second limiting cylinder. By controlling the movement of the two clamping frames, the ring-shaped magnetic core is clamped and fixed. The second limiting cylinder is then combined and fixed to the first limiting cylinder with bolts. One end of the wire is inserted into the connecting hole. A servo motor is started to drive the drive gear to rotate. The drive gear meshes with the rack, causing the entire winding frame to move along the circular arc track. This winding frame pulls the wire to wind the ring-shaped magnetic core. During the winding process, the drive wheel drives the entire ring-shaped magnetic core to rotate as a whole, achieving the overall rotation of the ring-shaped magnetic core. The winding process forms a current inductance coil, improving overall production efficiency. After the current inductance coil is wound, the limiting cylinder is disassembled, and the clamping frame is disengaged from the coil. The winding table is then lifted into the filling storage cylinder. During this process, the filling component leaves the current inductance coil inside the filling storage cylinder. This process is repeated to fill the wound current inductance coil into the filling storage cylinder for stacking and storage. Once the filling storage cylinder is full, it can be disassembled and transported, and a new filling storage cylinder can be installed for use. The filling storage cylinder protects the internal current inductance coil.

[0009] The first limiting cylinder and the second limiting cylinder are fixedly connected by bolts. The limiting assembly includes guide grooves opened in both the first and second limiting cylinders, and wheel seats slidably connected in each guide groove. Each wheel seat is rotatably connected to a limiting wheel, and a push spring is fixed between each wheel seat and the bottom of the corresponding guide groove.

[0010] With the above structure, the push spring can push the wheel seat and the limiting wheel, so that the two limiting wheels can fit tightly against the annular magnetic core. The limit wheel can also be adjusted according to the thickness of the wound coil to maintain the overall structural stability.

[0011] A bidirectional lead screw is rotatably connected inside the winding table. The threaded sections on both sides of the bidirectional lead screw are threadedly connected to the corresponding skeleton fixing seats. A servo motor II is fixed inside the winding table. The output shaft of the servo motor II is coaxially fixedly connected to the bidirectional lead screw. A transmission bevel gear I is coaxially fixedly connected to the bidirectional lead screw. A transmission lead screw is rotatably connected inside the winding table. One end of the transmission lead screw is coaxially fixedly connected to a transmission bevel gear II. The transmission bevel gear II meshes with the transmission bevel gear I. The transmission lead screw is threadedly connected to a limiting cylinder I.

[0012] With the above structure, the servo motor can drive the bidirectional lead screw to rotate. The bidirectional lead screw then drives the transmission lead screw to rotate synchronously through the meshing of the transmission bevel gear and the transmission bevel gear. The bidirectional lead screw drives the two frame fixing seats to move in opposite directions, while the transmission lead screw can drive the limit cylinder to move as a whole. Thus, the three components can be adjusted and matched according to the size of the ring magnetic core to improve the adaptation effect.

[0013] Both support frames are rotatably connected to adjustment screws, and both support frames are fixed with servo motors. Both servo motors are coaxially fixed to the corresponding adjustment screws, and both adjustment screws are threaded to the winding table.

[0014] Using the above structure, the control screw can be rotated by the servo motor. After the control screw rotates, it will drive the winding table to move up and down, so as to fill the winding current inductor coil into the filling storage cylinder for storage and protection.

[0015] Each of the aforementioned frame fixing seats has an extension groove, and each extension groove is slidably engaged with a corresponding clamping frame. Each frame fixing seat and the corresponding clamping frame are rotatably connected to a drive wheel. Each frame fixing seat has a servo motor four fixed inside, and the output shaft of the servo motor four is coaxially fixedly connected to the corresponding drive wheel. Each clamping frame and the bottom of the corresponding extension groove are fixedly connected to a return spring. Each frame fixing seat also has a servo motor five fixed inside, and each servo motor five has a winding wheel coaxially fixedly connected to its output shaft. Each winding wheel is fixedly connected to a traction rope, and one end of each traction rope is fixedly connected to the corresponding clamping frame.

[0016] With the above structure, the servo motor can drive the winding wheel to rotate. After the winding wheel rotates, it will wind up the traction rope, which will drive the clamping frame to move, thereby realizing the clamping action of the toroidal magnetic core.

[0017] The mounting plate has a mounting hole at its center, the fastener is a cylindrical tube, and the fastener connection end has a deformation opening, and the fastener connection end is engaged with the mounting hole.

[0018] With the above structure, the deformation opening is squeezed and closed during the insertion of the fastener into the mounting hole. After the fastener is inserted, the deformation opening is no longer restricted, and the structure of pushing back the fastener forms a simple restriction on the mounting plate, preventing the mounting plate from falling off.

[0019] Both of the support rods are slidably connected to the top of an insert block, and each support rod is rotatably connected to the top of a drive bolt. Each drive bolt is threadedly connected to the corresponding insert block. The bottom of the filling storage cylinder is provided with a pair of slots, and each slot is inserted into the corresponding insert block.

[0020] With the above structure, the drive bolt can be rotated to control the movement of the insert block. After the insert block moves, it will engage with the slot, thereby achieving the installation and fixation of the filling storage cylinder.

[0021] The filling assembly includes multiple storage slots opened in the bottom of the filling storage cylinder, a filling block rotatably connected in each storage slot, and a torsion spring fixed on the rotating shaft of each filling block to restrict the filling block to a horizontal state.

[0022] Using the above structure, the filling block can be squeezed back by the edge of the current inductor coil. When the current inductor coil rises to a certain level, the filling block loses its restriction and springs back to its original position. At this time, the winding table descends, leaving the current inductor coil in the filling storage cylinder. This process is repeated to fill the winding current inductor coil into the filling storage cylinder for stacking and storage.

[0023] A pair of handles are fixed on the filling and storage cylinder.

[0024] The above structure allows for easier assembly and disassembly of the storage cylinder using a handle, improving overall operational efficiency.

[0025] A manufacturing process for a low-voltage current transformer includes:

[0026] S1. Core preparation: According to the typical Mn-Zn ferrite ratio: Fe2O3: 50–54 mol%, MnO: 17–21 mol%, ZnO: 28–31 mol%, and the flux Co2O3 is added to improve sintering activity. These materials are ball-milled to a particle size <1 μm to ensure uniform mixing. After uniform mixing, the mixture is pre-sintered at 890–950℃. The pre-sintered powder is directly pressed into a green body and placed in a sintering machine for sintering. After sintering, the temperature is held at 1350–1400℃ for 3 hours. After holding, the temperature is reduced to below 600℃ at 5℃ / min to prevent abnormal grain growth. This yields a toroidal core. After the toroidal core has completely cooled to room temperature, the toroidal core is cut to open an air gap to improve anti-saturation properties. Epoxy resin is then coated on its surface for moisture protection and insulation.

[0027] S2. Wire winding: The prepared toroidal magnetic core is placed on two frame fixing seats and limit cylinder two. At this time, by controlling the movement of the two clamping frames, multiple drive wheels move relative to each other to achieve the clamping and fixing effect of the toroidal magnetic core. Then, limit cylinder two is combined and fixed with limit cylinder one by bolts. One end of the wire is inserted into the connection hole. By starting servo motor one, the drive gear is driven to rotate. The drive gear meshes with the rack, so that the entire winding frame moves around the arc track after being combined. The winding frame pulls the wire to wind the toroidal magnetic core. During the winding process, the drive wheels drive the entire toroidal magnetic core to rotate as a whole, so as to achieve the overall winding of the toroidal magnetic core and form a current inductance coil.

[0028] S3. Coil Storage: After the current inductor coil is wound, the limiting cylinder two is disassembled, and the clamping frame is controlled to disengage from the coil clamping limit. At this time, the servo motor three drives the control screw to rotate. After the control screw rotates, it drives the winding table to lift. The winding table rises into the filling storage cylinder. During this process, the edge of the current inductor coil squeezes the filling block to retract. When the current inductor coil rises to a certain extent, the filling block loses its restriction and springs back to its original position. At this time, the winding table descends, leaving the current inductor coil in the filling storage cylinder. This process is repeated to fill the winding current inductor coil into the filling storage cylinder for stacking and storage. After the filling storage cylinder is full, it can be disassembled and transferred, and a new filling storage cylinder can be installed for use. The filling storage cylinder protects the internal current inductor coil.

[0029] S4. Housing Assembly: Take out the current transformer coil from the top opening of the filling storage cylinder and install it in the housing with the terminal system. After installation, fill and seal with nitrogen to assemble a low-voltage current transformer.

[0030] Compared with existing technologies, the production equipment and process for this low-voltage current transformer have the following advantages:

[0031] 1. The prepared toroidal magnetic core is placed on two frame fixing seats and limit cylinder two. Then, by controlling the movement of the two clamping frames, the toroidal magnetic core is clamped and fixed. Limit cylinder two is combined and fixed with limit cylinder one by bolts. One end of the wire is inserted into the connecting hole. By starting servo motor one, the drive gear is rotated. The drive gear meshes with the rack, so that the entire winding frame moves around the arc track after being combined. The winding frame pulls the wire to wind the toroidal magnetic core. During the winding process, the drive wheel drives the entire toroidal magnetic core to rotate as a whole, realizing the overall winding of the toroidal magnetic core, forming a current inductance coil, and improving the overall production efficiency.

[0032] 2. After the current inductor coil is wound, the limiting cylinder 2 is disassembled, and the clamping frame is controlled to disengage from the coil clamping limit. The winding table is then raised and enters the filling storage cylinder. During this process, the filling component leaves the current inductor coil inside the filling storage cylinder. This process is repeated to fill the wound current inductor coil into the filling storage cylinder for stacking and storage. Once the filling storage cylinder is full, it can be disassembled and transported, and a new filling storage cylinder can be installed for use. The filling storage cylinder protects the internal current inductor coil. Horizontal stacking ensures that the stacked layers bear uniform pressure, suppresses magnetic domain distortion, optimizes storage efficiency, and maintains electromagnetic performance stability. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the process steps of the present invention.

[0034] Figure 2 This is a schematic diagram of the overall structure of the device in this invention.

[0035] Figure 3 This is a schematic diagram of the structure after the limiting cylinder one and the limiting cylinder two are combined in this invention.

[0036] Figure 4 This is a schematic diagram of the internal structure of the skeleton fixing seat in this invention.

[0037] Figure 5 This is a schematic diagram of the internal structure of the storage cylinder in this invention.

[0038] Figure 6 This is a schematic diagram of the internal structure of the winding station in this invention.

[0039] Figure 7 This is a schematic diagram of the internal structure of the limiting cylinder in this invention.

[0040] Figure 8 This is a schematic diagram of the internal structure of the winding frame in this invention.

[0041] Figure 9 This is a schematic diagram of the overall structure of the winding frame in this invention.

[0042] Figure 10 This is a schematic diagram of the internal structure of the support rod in this invention.

[0043] In the diagram: 1. Support rod; 2. Winding table; 3. Frame fixing seat; 4. Clamping frame; 5. Limiting cylinder one; 6. Limiting cylinder two; 7. Arc track; 8. Winding frame; 9. Rack; 10. Drive gear; 11. Servo motor one; 12. Stabilizing wheel; 13. Filling groove; 14. Mounting plate; 15. Fastener; 16. Wire reel; 17. Ring magnetic core; 18. Connecting hole; 19. Filling storage cylinder; 20. Guide groove; 21. Wheel seat; 22. Limiting wheel; 23. Push spring; 24. Bidirectional wire 25. Servo Motor II; 26. Transmission Bevel Gear I; 27. Transmission Lead Screw; 28. Transmission Bevel Gear II; 29. ​​Adjustment Lead Screw; 30. Servo Motor III; 31. Extension Groove; 32. Drive Wheel; 33. Servo Motor IV; 34. Return Spring; 35. Servo Motor V; 36. Winding Roller; 37. Traction Rope; 38. Mounting Hole; 39. Deformation Opening; 40. Insert Block; 41. Drive Bolt; 42. Slot; 43. Storage Slot; 44. Filling Block; 45. Handle; 46. Base. Detailed Implementation

[0044] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments.

[0045] like Figures 1-10As shown, a low-voltage current transformer production equipment includes a base 46, a pair of support rods 1 fixed on the base 46, and a winding table 2 slidably connected between the two support rods 1. A pair of frame fixing seats 3 are slidably connected to the top surface of the winding table 2. Clamping frames 4 are slidably arranged on both frame fixing seats 3. Limiting cylinder 1 5 is slidably connected to the winding table 2. Limiting cylinder 2 6 is provided on limiting cylinder 1 5. Limiting components are provided on both limiting cylinder 1 5 and limiting cylinder 2 6. Arc tracks 7 that are combined to form a circle are opened on the sides of both limiting cylinder 1 5 and limiting cylinder 2 6. Winding frames 8 are slidably arranged on both arc tracks 7. Racks 9 are fixed in both arc tracks 7. A drive gear 10 is rotatably connected to the winding frame 8. The drive gear 10 meshes with the rack 9. A servo is fixed in the winding frame 8. The output shaft of the servo motor 11 is coaxially fixedly connected to the drive gear 10, and a pair of stabilizing wheels 12 are rotatably connected to the winding frame 8. The wheel surfaces of the two stabilizing wheels 12 are in contact with the arc track 7. A loading groove 13 is provided on the winding frame 8, and a mounting plate 14 is rotatably connected in the loading groove 13. A fastener 15 is coaxially fixed at the axis of the mounting plate 14. A wire tray 16 is provided on the mounting plate 14, and the wire tray 16 and the fastener 15 are engaged. A ring magnetic core 17 is placed on the two frame fixing seats 3 and the limiting cylinder 5. A connection hole 18 is provided on the environmental frame. One end of the wire on the wire tray 16 is engaged with the connection hole 18. A loading storage cylinder 19 is provided at the top of the two support rods 1, and a loading assembly is provided at the bottom of the loading storage cylinder 19.

[0046] The prepared annular magnetic core 17 can be placed on two frame fixing seats 3 and limiting cylinder 2 6. At this time, by controlling the movement of the two clamping frames 4, the annular magnetic core 17 is clamped and fixed. The limiting cylinder 2 6 is combined and fixed with the limiting cylinder 1 5 by bolts. One end of the wire is inserted into the connecting hole 18. By starting the servo motor 11, the drive gear 10 is driven to rotate. The drive gear 10 meshes with the rack 9, so that the entire winding frame 8 moves around the arc track 7 after being combined. The winding frame 8 pulls the wire to wind the annular magnetic core 17. During the winding process, the drive wheel 32 drives the entire annular magnetic core 17 to rotate as a whole, so as to achieve the winding of the annular magnetic core 17. The overall winding process forms a current inductance coil, improving overall production efficiency. After the current inductance coil is wound, the limiting cylinder 2 6 is disassembled, and the clamping frame 4 is controlled to disengage from the coil clamping limit. The winding table 2 is then lifted into the filling storage cylinder 19. During this process, the filling component leaves the current inductance coil inside the filling storage cylinder 19. This process is repeated to fill the wound current inductance coil into the filling storage cylinder 19 for stacking and storage. Once the filling storage cylinder 19 is full, it can be disassembled and transported, and a new filling storage cylinder 19 can be installed for use. The filling storage cylinder 19 protects the internal current inductance coil.

[0047] The first limiting cylinder 5 and the second limiting cylinder 6 are fixedly connected by bolts. The limiting assembly includes guide grooves 20 opened in both the first limiting cylinder 5 and the second limiting cylinder 6, wheel seats 21 slidably connected in each guide groove 20, a limiting wheel 22 rotatably connected on each wheel seat 21, and a push spring 23 fixed between each wheel seat 21 and the bottom of the corresponding guide groove 20.

[0048] With the above structure, the wheel seat 21 and the limiting wheel 22 can be pushed by the push spring 23, so that the two limiting wheels 22 can fit tightly against the annular magnetic core 17, and can be adjusted accordingly according to the thickness of the wound coil to maintain the overall structural stability.

[0049] A bidirectional lead screw 24 is rotatably connected inside the winding table 2. The threaded sections on both sides of the bidirectional lead screw 24 are threadedly connected to the corresponding skeleton fixing seat 3. A servo motor 25 is fixed inside the winding line. The output shaft of the servo motor 25 is coaxially fixedly connected to the bidirectional lead screw 24. A transmission bevel gear 26 is coaxially fixedly connected to the bidirectional lead screw 24. A transmission lead screw 27 is rotatably connected inside the winding table 2. A transmission bevel gear 28 is coaxially fixedly connected to one end of the transmission lead screw 27. The transmission bevel gear 28 meshes with the transmission bevel gear 26. The transmission lead screw 27 is threadedly connected to the limiting cylinder 5.

[0050] With the above structure, the bidirectional lead screw 24 can be rotated by the servo motor 25. The bidirectional lead screw 24 then drives the transmission lead screw 27 to rotate synchronously through the meshing of the transmission bevel gear 26 and the transmission bevel gear 28. The bidirectional lead screw 24 drives the two skeleton fixing seats 3 to move in opposite directions, while the transmission lead screw 27 can drive the limit cylinder 5 to move as a whole. Thus, the three components can be adjusted and matched according to the size of the annular magnetic core 17 to improve the adaptation effect.

[0051] Both support frames are rotatably connected to adjusting screws 29, and both support frames are fixed with servo motors 30. Both servo motors 30 are coaxially fixedly connected to the corresponding adjusting screws 29, and both adjusting screws 29 are threadedly connected to the winding table 2.

[0052] Using the above structure, the control screw 29 can be rotated by the servo motor 30. After the control screw 29 rotates, it will drive the winding table 2 to move up and down, so as to fill the winding current inductor coil into the filling storage cylinder 19 for storage and protection.

[0053] Each frame fixing seat 3 has an extension groove 31, and each extension groove 31 is slidably engaged with a corresponding clamping frame 4. Each frame fixing seat 3 and the corresponding clamping frame 4 are rotatably connected by a drive wheel 32. Each frame fixing seat 3 has a servo motor 4 33 fixed inside, and the output shaft of the servo motor 4 33 is coaxially fixedly connected to the corresponding drive wheel 32. Each clamping frame 4 and the bottom of the corresponding extension groove 31 are fixedly connected by a return spring 34. Each frame fixing seat 3 also has a servo motor 5 35 fixed inside, and each servo motor 5 35 has a winding wheel 36 coaxially fixedly connected to its output shaft. Each winding wheel 36 has a traction rope 37 fixedly connected to its winding rope 37, and one end of each traction rope 37 is fixedly connected to the corresponding clamping frame 4.

[0054] With the above structure, the servo motor 35 can drive the winding wheel 36 to rotate. After the winding wheel 36 rotates, it will wind up the traction rope 37, which will drive the clamping frame 4 to move, thereby realizing the clamping action of the annular magnetic core 17.

[0055] The mounting plate 14 has a mounting hole 38 at its axis. The fastener 15 is a cylindrical tube, and the connecting end of the fastener 15 has a deformation opening 39. The connecting end of the fastener 15 is engaged with the mounting hole 38.

[0056] With the above structure, during the process of inserting the fastener 15 into the mounting hole 38, the deformation opening 39 is squeezed and closed. After the fastener 15 is inserted, the deformation opening 39 is no longer restricted. The structure of pushing back the fastener 15 forms a simple restriction on the mounting plate 14, preventing the mounting plate 14 from falling off.

[0057] Both support rods 1 are slidably connected to the top of the plug 40, and each support rod 1 is rotatably connected to the top of the drive bolt 41. Each drive bolt 41 is threadedly connected to the corresponding plug 40. The bottom of the filling storage cylinder 19 is provided with a pair of slots 42, and each slot 42 is inserted into the corresponding plug 40.

[0058] With the above structure, the drive bolt 41 can be rotated to control the movement of the insert 40. After the insert 40 moves, it will be inserted into the slot 42 to achieve the installation and fixation of the filling storage cylinder 19.

[0059] The filling assembly includes multiple storage slots 43 opened in the bottom of the filling storage cylinder 19, and a filling block 44 rotatably connected in each storage slot 43. A torsion spring is fixed on the rotating shaft of each filling block 44 to limit the filling block 44 to a horizontal state.

[0060] Using the above structure, the filling block 44 can be retracted by squeezing the edge of the current inductor coil. When the current inductor coil rises to a certain level, the filling block 44 loses its restriction and springs back to its original position. At this time, the winding table 2 descends, leaving the current inductor coil in the filling storage cylinder 19. This process is repeated to fill the wound current inductor coil into the filling storage cylinder 19 for stacking and storage.

[0061] A pair of handles 45 are fixed on the filling storage cylinder 19.

[0062] With the above structure, the filling and storage cylinder 19 can be disassembled and assembled with the handle 45, thereby improving the efficiency of the overall operation.

[0063] The working principle of this invention is as follows: A servo motor 25 drives a bidirectional lead screw 24 to rotate. The bidirectional lead screw 24, through the meshing of a transmission bevel gear 26 and a transmission bevel gear 28, synchronously drives a transmission lead screw 27 to rotate. The bidirectional lead screw 24 drives two frame fixing seats 3 to move in opposite directions, while the transmission lead screw 27 can drive a limiting cylinder 5 to move as a whole. Thus, the three components are adjusted and matched according to the size of the annular magnetic core 17 to improve the fitting effect. Then, the prepared annular magnetic core 17 is placed... On the two frame fixing seats 3 and the limiting cylinder 2 6, the servo motor 5 35 drives the winding wheel 36 to rotate. After the winding wheel 36 rotates, it will wind up the traction rope 37, causing the traction rope 37 to drive the clamping frame 4 to move, realizing the clamping action of the annular magnetic core 17. Then, the limiting cylinder 2 6 is combined and fixed with the limiting cylinder 1 5 by bolts. One end of the wire is inserted into the connecting hole 18. The servo motor 1 11 is started to drive the drive gear 10 to rotate. The drive gear 10 meshes with the rack 9, realizing the entire winding frame 8. The coil reel 8 moves around the assembled circular track 7, using the reel 8 to pull the wire to wind the annular magnetic core 17. During the winding process, the drive wheel 32 drives the entire annular magnetic core 17 to rotate as a whole. After the current inductance coil is wound, the limiting cylinder 6 is disassembled, and the clamping frame 4 is controlled to disengage from the coil clamping limit. At this time, the servo motor 30 drives the control screw 29 to rotate. After the control screw 29 rotates, it drives the winding table 2 to lift. The winding table 2 rises into the filling storage cylinder 19. During this process, the electric... The edge of the current inductor coil forces the filling block 44 to retract. When the current inductor coil rises to a certain level, the filling block 44 loses its restriction and springs back to its original position. At this time, the winding table 2 descends, leaving the current inductor coil in the filling storage cylinder 19. This process is repeated to fill the winding current inductor coil into the filling storage cylinder 19 for stacking and storage. Once the filling storage cylinder 19 is full, it can be disassembled and transported, and a new filling storage cylinder 19 can be installed for use. The filling storage cylinder 19 protects the internal current inductor coil.

[0064] In summary, the prepared annular magnetic core 17 is placed on two frame fixing seats 3 and the second limiting cylinder 6. The two clamping frames 4 are then moved to clamp and fix the annular magnetic core 17. The second limiting cylinder 6 is combined and fixed with the first limiting cylinder 5 using bolts. One end of the wire is inserted into the connecting hole 18. The servo motor 11 is started to drive the drive gear 10 to rotate. The drive gear 10 meshes with the rack 9, causing the entire winding frame 8 to move around the assembled arc track 7. The winding frame 8 pulls the wire to wind the annular magnetic core 17. During the winding process, the drive wheel 32 drives the entire annular magnetic core 17 to rotate as a whole, thus achieving the winding of the annular magnetic core 17. 7. The overall winding process forms a current inductance coil, improving overall production efficiency. After the current inductance coil is wound, the limiting cylinder 2 6 is disassembled, and the clamping frame 4 is controlled to disengage from the coil clamping limit. The winding table 2 is lifted and enters the filling storage cylinder 19. During this process, the filling component leaves the current inductance coil in the filling storage cylinder 19. The wound current inductance coil is repeatedly filled into the filling storage cylinder 19 for stacking and storage. After the filling storage cylinder 19 is full, it can be disassembled and transferred, and a new filling storage cylinder 19 can be installed for use. The filling storage cylinder 19 protects the internal current inductance coil.

[0065] A manufacturing process for a low-voltage current transformer includes:

[0066] S1. Core preparation: According to the typical Mn-Zn ferrite ratio: Fe2O3: 50–54 mol%, MnO: 17–21 mol%, ZnO: 28–31 mol%, and the flux Co2O3 is added to improve sintering activity. These materials are ball-milled to a particle size <1 μm to ensure uniform mixing. After uniform mixing, the mixture is pre-sintered at 890–950℃. The pre-sintered powder is directly pressed into a green body and placed in a sintering machine for sintering. After sintering, the temperature is held at 1350–1400℃ for 3 hours. After holding, the temperature is reduced to below 600℃ at 5℃ / min to prevent abnormal grain growth. This yields the toroidal core 17. After the toroidal core 17 has completely cooled to room temperature, the toroidal core 17 is cut to open an air gap to improve anti-saturation properties. Epoxy resin is then coated on its surface for moisture protection and insulation.

[0067] S2. Wire winding: The prepared annular magnetic core 17 is placed on two skeleton fixing seats 3 and limit cylinder 2 6. At this time, by controlling the movement of the two clamping frames 4, multiple drive wheels 32 move relative to each other to achieve the clamping and fixing effect of the annular magnetic core 17. Then, limit cylinder 2 6 is combined and fixed with limit cylinder 1 5 by bolts. One end of the wire is inserted into the connection hole 18. By starting the servo motor 11, the drive gear 10 is driven to rotate. The drive gear 10 meshes with the rack 9, so that the entire winding frame 8 moves around the arc track 7. The winding frame 8 pulls the wire to wind the annular magnetic core 17. During the winding process, the drive wheels 32 drive the entire annular magnetic core 17 to rotate as a whole, so as to achieve the overall winding of the annular magnetic core 17 and form a current inductance coil.

[0068] S3. Coil Storage: After the current inductor coil is wound, the limiting cylinder 2 6 is disassembled, and the clamping frame 4 is controlled to disengage from the clamping limit of the coil. At this time, the servo motor 30 drives the control screw 29 to rotate. After the control screw 29 rotates, it will drive the winding table 2 to lift. The winding table 2 rises into the filling storage cylinder 19. During this process, the edge of the current inductor coil squeezes the filling block 44 to retract. When the current inductor coil rises to a certain extent, the filling block 44 loses its restriction and rebounds to reset. At this time, the winding table 2 descends, leaving the current inductor coil in the filling storage cylinder 19. This process is repeated to fill the winding current inductor coil into the filling storage cylinder 19 for stacking and storage. After the filling storage cylinder 19 is full, it can be disassembled and transferred, and a new filling storage cylinder 19 can be installed for use. The filling storage cylinder 19 protects the internal current inductor coil.

[0069] S4. Housing Assembly: Take out the current transformer coil from the top opening of the filling storage cylinder 19 and install it in the housing with the terminal system. After installation, fill and seal with nitrogen to assemble a low-voltage current transformer.

[0070] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A low-voltage current transformer manufacturing equipment, comprising a base (46), a pair of support rods (1) fixed on the base (46), and a winding table (2) slidably connected between the two support rods (1), characterized in that, The top surface of the winding table (2) is slidably connected to a pair of skeleton fixing seats (3). Each skeleton fixing seat (3) is slidably equipped with a clamping frame (4). The winding table (2) is slidably connected to a limiting cylinder one (5). A limiting cylinder two (6) is provided on the limiting cylinder one (5). Both the limiting cylinder one (5) and the limiting cylinder two (6) are provided with limiting components. The sides of the limiting cylinder one (5) and the limiting cylinder two (6) are provided with arc tracks (7) that are combined to form a circle. Both arc tracks (7) are slidably equipped with winding frames (8). Both arc tracks (7) are fixed with racks (9). A drive gear (10) is rotatably connected to the winding frame (8). The drive gear (10) meshes with the rack (9). A servo motor one (11) is fixed inside the winding frame (8). The output shaft of the servo motor one (11) is connected to the drive gear (10). A coaxial fixed connection is made, and a pair of stabilizing wheels (12) are rotatably connected on the winding frame (8). The wheel surfaces of the two stabilizing wheels (12) are in contact with the arc track (7). A filling groove (13) is opened on the winding frame (8). An installation plate (14) is rotatably connected in the filling groove (13). A fastener (15) is coaxially fixed at the axis of the installation plate (14). A wire tray (16) is set on the installation plate (14). The wire tray (16) and the fastener (15) are engaged in a snap-fit. A ring magnetic core (17) is placed on the two frame fixing seats (3) and the limiting cylinder (5). A connection hole (18) is opened on the environmental frame. One end of the wire on the wire tray (16) is engaged in a snap-fit ​​with the connection hole (18). A filling storage cylinder (19) is set on the top of the two support rods (1). A filling component is set on the bottom of the filling storage cylinder (19).

2. The low-voltage current transformer production equipment according to claim 1, characterized in that, The first limiting cylinder (5) and the second limiting cylinder (6) are fixedly connected by bolts. The limiting assembly includes guide grooves (20) opened in both the first limiting cylinder (5) and the second limiting cylinder (6), and wheel seats (21) slidably connected in each guide groove (20). Each wheel seat (21) is rotatably connected to a limiting wheel (22), and a push spring (23) is fixed between each wheel seat (21) and the bottom of the corresponding guide groove (20).

3. The low-voltage current transformer production equipment according to claim 1, characterized in that, The winding table (2) is rotatably connected to a bidirectional lead screw (24). The threaded sections on both sides of the bidirectional lead screw (24) are threadedly connected to the corresponding skeleton fixing seat (3). A servo motor (25) is fixed inside the winding line. The output shaft of the servo motor (25) is coaxially fixedly connected to the bidirectional lead screw (24). A transmission bevel gear (26) is coaxially fixedly connected to the bidirectional lead screw (24). A transmission lead screw (27) is rotatably connected inside the winding table (2). A transmission bevel gear (28) is coaxially fixedly connected to one end of the transmission lead screw (27). The transmission bevel gear (28) meshes with the transmission bevel gear (26). The transmission lead screw (27) is threadedly connected to the limiting cylinder (5).

4. The low-voltage current transformer production equipment according to claim 1, characterized in that, Both of the support frames are rotatably connected to the control screws (29), and both of the support frames are fixed with servo motors (30). Both servo motors (30) are coaxially fixedly connected to the corresponding control screws (29), and both control screws (29) are threadedly connected to the winding table (2).

5. The low-voltage current transformer production equipment according to claim 1, characterized in that, Each of the aforementioned frame fixing seats (3) is provided with an extension groove (31), and each extension groove (31) is slidably engaged with a corresponding clamping frame (4). Each frame fixing seat (3) and the corresponding clamping frame (4) are rotatably connected with a drive wheel (32). Each frame fixing seat (3) is fixed with a servo motor four (33), and the output shaft of the servo motor four (33) is coaxially fixedly connected with the corresponding drive wheel (32). Each clamping frame (4) and the bottom of the corresponding extension groove (31) are fixed with a return spring (34). Each frame fixing seat (3) is fixed with a servo motor five (35), and a winding wheel (36) is coaxially fixedly connected to the output shaft of each servo motor five (35). Each winding wheel (36) is fixedly connected with a traction rope (37), and one end of each traction rope (37) is fixedly connected to the corresponding clamping frame (4).

6. The low-voltage current transformer production equipment according to claim 1, characterized in that, The mounting plate (14) has a mounting hole (38) at its axis. The fastener (15) is a cylindrical tube and has a deformation opening (39) at its connecting end. The fastener (15) is engaged with the mounting hole (38) by a snap-fit.

7. The low-voltage current transformer production equipment according to claim 1, characterized in that, Both of the support rods (1) are slidably connected to the top of the plug (40), and each support rod (1) is rotatably connected to the top of the drive bolt (41). Each drive bolt (41) is threadedly connected to the corresponding plug (40). The bottom of the filling storage cylinder (19) is provided with a pair of slots (42), and each slot (42) is inserted into the corresponding plug (40).

8. The low-voltage current transformer production equipment according to claim 1, characterized in that, The filling assembly includes multiple storage slots (43) opened in the bottom of the filling storage cylinder (19), and a filling block (44) rotatably connected in each storage slot (43). A torsion spring is fixed on the rotating shaft of each filling block (44) to restrict the filling block (44) to a horizontal state.

9. A low-voltage current transformer production equipment according to claim 1, characterized in that, A pair of handles (45) are fixed on the filling storage cylinder (19).

10. A manufacturing process for a low-voltage current transformer, characterized in that, Using the low-voltage current transformer manufacturing equipment as described in any one of claims 1-9, Includes the following steps; S1. Core preparation: According to the typical Mn-Zn ferrite ratio: Fe2O3: 50–54 mol%, MnO: 17–21 mol%, ZnO: 28–31 mol%, and add flux Co2O3 to improve sintering activity. These materials are ball-milled to a particle size <1 μm to ensure uniform mixing. After uniform mixing, they are pre-sintered at 890–950℃. The pre-sintered powder is directly pressed into a blank and placed in a sintering machine for sintering. After sintering, the temperature is kept at 1350–1400℃ for 3 hours. After the temperature is kept at 5℃ / min, the temperature is reduced to below 600℃ to prevent abnormal grain growth. In this way, a ring core (17) is obtained. After the ring core (17) is completely cooled to room temperature, the ring core (17) is cut to open an air gap to improve anti-saturation characteristics. Epoxy resin is coated on its surface for moisture protection and insulation. S2, Wire winding: The prepared ring magnetic core (17) is placed on two skeleton fixing seats (3) and limit cylinder two (6). At this time, by controlling the movement of the two clamping frames (4), multiple drive wheels (32) move relative to each other to achieve the clamping and fixing effect of the ring magnetic core (17). Then, limit cylinder two (6) is combined and fixed with limit cylinder one (5) by bolts. One end of the wire is inserted into the connection hole (18). By starting servo motor one (11), the drive gear (10) is driven to rotate. The drive gear (10) meshes with the rack (9) to realize the movement of the entire winding frame (8) around the arc track (7). The winding frame (8) pulls the wire to wind the ring magnetic core (17). During the winding process, the drive wheel (32) drives the entire ring magnetic core (17) to rotate as a whole to realize the overall winding of the ring magnetic core (17) to form a current inductance coil. S3, Coil Storage: After the current inductor coil is wound, the limiting cylinder two (6) is disassembled, and the clamping frame (4) is controlled to disengage from the clamping limit of the coil. At this time, the servo motor three (30) drives the adjusting screw (29) to rotate. After the adjusting screw (29) rotates, it will drive the winding table (2) to lift. The winding table (2) rises into the filling storage cylinder (19). During this process, the edge of the current inductor coil squeezes the filling block (44) to retract. When the current inductor coil rises to the first position... After a certain amplitude, the loading block (44) loses its restriction and springs back to its original position. At this time, the winding table (2) descends, leaving the current inductor coil in the loading storage cylinder (19). The wound current inductor coil is loaded into the loading storage cylinder (19) and stacked for storage. After the loading storage cylinder (19) is full, it can be disassembled and transported, and a new loading storage cylinder (19) can be installed for use. The loading storage cylinder (19) protects the internal current inductor coil. S4. Housing Assembly: Take out the current transformer coil from the top opening of the filling storage cylinder (19) and install it in the housing with the terminal system. After installation, fill and seal with nitrogen to assemble a low-voltage current transformer.

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