A coil winding device of a current transformer of a smart power distribution system ring main unit

Abstract

The application discloses a coil winding device of a current transformer of an intelligent power distribution system looped network cabinet, relates to the technical field of transformer manufacturing, and adopts a detachable assembly structure for the spool ring, can quickly replace accessories according to different outer diameters of iron cores and different wire diameters of enameled copper wires, and after a closing connecting piece blocks a gap, relies on a pull rod, a limiting block and a No. 1 spring to form a mechanical static locking structure, pre-constraints the rotating freedom of the connecting piece before winding, prevents the gap from being broken due to equipment vibration and manual error touch, and when the spool ring rotates at a high speed, the abutting block is automatically lifted and tightly presses the limiting block under the action of centrifugal force, forms dynamic secondary reinforcement locking which is self-adaptive to the rotating speed, the higher the rotating speed, the stronger the locking and pressing force, completely solves the defect of the loosening and failure of the connecting piece under the high-speed winding condition, greatly improves the stability of the equipment, and solves the condition that only a single bolt locking exists in the existing equipment.

Description

Technical Field

[0001] This invention relates to the field of current transformer manufacturing technology, specifically to a coil winding device for a current transformer in a smart power distribution system ring main unit. Background Technology

[0002] Current transformers are widely used in intelligent distribution ring network cabinets. They can be installed on-site without disconnecting the primary busbar. They are mainly responsible for power metering and relay protection signal acquisition in power distribution systems. During the production and processing of this type of transformer, the split iron core needs to be wound with copper wire twice. The winding quality directly determines the final metering accuracy, insulation performance and operational reliability of the transformer.

[0003] Although the toroidal winding carrier used in conventional winding equipment has notches to facilitate the loading and unloading of iron cores, the closing structure of the notches mostly relies on a single bolt or simple buckle for locking. During the high-speed operation of the equipment, the continuous vibration and centrifugal force generated by rotation can easily cause the locking structure to loosen.

[0004] Secondly, the existing iron core clamping fixtures have a single structural form, mostly using two-point clamping or single-sided support. After the iron core is clamped, it is easy to cause eccentricity, resulting in large radial runout during the winding process and uneven winding arrangement.

[0005] The existing technical solutions have obvious limitations in practice: Although the annular winding carrier used in conventional winding equipment has notches to facilitate the loading and unloading of iron cores, the closing structure of the notches mostly relies on a single bolt or simple buckle for locking. During the high-speed operation of the equipment, the continuous vibration and centrifugal force generated by rotation can easily cause the locking structure to loosen, resulting in the notch opening unexpectedly, which in turn causes the iron core and copper wire to fall off, causing production accidents. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a coil winding device for current transformers in intelligent power distribution system ring main units. This solves the problem mentioned in the background art that although conventional winding equipment uses annular winding carriers with notches to facilitate the loading and unloading of iron cores, the closing structure of these notches mostly relies on a single bolt or simple buckle for locking. During high-speed operation of the equipment, continuous vibration and centrifugal force generated by rotation can easily cause the locking structure to loosen, leading to the notch opening unexpectedly, which in turn causes the iron core and copper wire to fall off, resulting in production accidents.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a coil winding device for a current transformer in a smart distribution system ring main unit, comprising an iron core body, and further comprising an installation mechanism; the installation mechanism comprises a bobbin frame, a bobbin ring, a connecting piece, a limiting groove, a sliding groove frame, a sliding cylinder, a pull rod, a limiting block, a first spring, an expansion frame, and a contact block; the bobbin ring is detachably mounted on the bobbin frame, and a notch is provided on the bobbin ring for the iron core body to be inserted, and the connecting piece is mounted on the notch. The opening is used to seal the spool ring. The limiting groove is formed on the connecting piece. The sliding frame is fixedly installed on the outer wall of the spool ring. The sliding cylinder is slidably assembled inside the sliding frame. The pull rod slides through the inside of the sliding cylinder. The limiting block is fixedly installed at the end of the pull rod. The first spring is assembled between the limiting block and the sliding cylinder. The first spring applies an elastic restoring thrust to the limiting block. The extension frame is fixedly installed on the sliding frame. The abutment block is slidably assembled inside the extension frame and can slide vertically along the extension frame.

[0008] In the above embodiment, after the connecting piece is closed to seal the gap, the pull rod is manually pulled outward to overcome the elastic force of the first spring, causing the limiting block to retract and disengage from the movement path of the connecting piece. The sliding cylinder slides down until the limiting block is precisely aligned with the limiting groove on the connecting piece. After the pull rod is released, the first spring resets and pushes the limiting block into the limiting groove, rigidly constraining the rotational freedom of the connecting piece and preventing equipment vibration or accidental contact from causing the connecting piece to loosen and the gap to break open again.

[0009] According to the above technical solution, the installation mechanism further includes a fixed frame, transmission wheels, a motor, and a synchronous belt; the fixed frame is used to support the overall installation of the bobbin frame, the transmission wheels are rotatably mounted on the bobbin frame, the number of transmission wheels is set to three, the motor is fixedly mounted on the bobbin frame, and the output end of the motor drives the three transmission wheels to rotate synchronously through the synchronous belt.

[0010] In the above embodiment, the motor outputs power to drive the synchronous belt to operate in a closed loop. The synchronous belt engages with all the transmission wheels synchronously, so that all the transmission wheels rotate synchronously at the same speed.

[0011] According to the above technical solution, the installation mechanism further includes a bobbin; the bobbin is detachably installed inside the bobbin ring, and the bobbin is a bearing component of the copper wire winding, used for winding and bearing the copper wire to be processed.

[0012] According to the above technical solution, the installation mechanism further includes a release arm and a pressure wheel; the release arm is rotatably mounted on the spool frame, and a torsion spring is provided between the release arm and the rotatable assembly position of the spool frame; the pressure wheel is rotatably mounted on the release arm, and the pressure wheel is elastically pressed against the outer surface of the spool ring by relying on the elastic restoring force of the torsion spring.

[0013] According to the above technical solution, the coil winding device of the current transformer of the intelligent power distribution system ring network cabinet also includes a positioning mechanism. The positioning mechanism is installed on the fixed frame and is used to center and clamp the iron core body during winding.

[0014] According to the above technical solution, the positioning mechanism includes a mounting frame, a sliding frame, and a second spring; the mounting frame is fixedly mounted on the fixed frame, the sliding frame is slidably mounted on the inner side of the mounting frame, and the sliding frame can make linear sliding movements relative to the mounting frame towards or away from the center of the iron core; the second spring is assembled between the sliding frame and the mounting frame, and the second spring continuously provides elastic reset preload force to the sliding frame.

[0015] In the above embodiment, the sliding frame slides linearly along the mounting frame in a radial direction. The second spring is disposed between the sliding frame and the mounting frame. The second spring is continuously in a pre-compressed state, pushing an elastic thrust toward the center of the iron core onto the sliding frame. The sliding frame can adaptively extend and retract in the radial direction to adapt to the iron cores of current transformers with different outer diameters. The wheel body is made to fit against the outer wall of the iron core by the elastic force of the second spring.

[0016] According to the above technical solution, the positioning mechanism further includes a drive wheel and a second motor; the drive wheel is rotatably installed inside the sliding frame, the second motor is fixedly mounted on the sliding frame, and the output end of the second motor is in transmission cooperation with the drive wheel to drive the drive wheel to rotate actively.

[0017] According to the above technical solution, the positioning mechanism also includes a self-driving wheel; the mounting frame, sliding frame, second spring and second motor are arranged in three sets along the circumference of the iron core center, of which only one set of the second motor is used as the power input source of the whole mechanism, and the self-driving wheel is rotatably installed inside the sliding frame of the remaining two sets of clamping drive units. The self-driving wheel has no independent driving power source and can passively follow the rotation of the iron core.

[0018] In the above embodiments, the remaining two sets of circumferential array clamping units have no independent power source. They are only equipped with self-driving wheels inside the sliding frame. The self-driving wheels only fit against the outer wall of the iron core and passively and synchronously rotate by the friction force brought by the rotation of the iron core.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. In this invention, the bobbin has a pre-reserved notch, allowing the iron core to be directly inserted through the notch. Both the bobbin and the bobbin adopt a detachable assembly structure, enabling quick replacement of parts according to different iron core outer diameters and different wire diameters of enameled copper wire. After the closing connecting piece seals the notch, a mechanical static locking structure is formed by the pull rod, the limiting block, and the No. 1 spring. Before winding, the rotational freedom of the connecting piece is rigidly constrained in advance, preventing the notch from breaking open due to equipment vibration or accidental human contact. When the bobbin rotates at high speed, the contact block automatically moves upward and tightens the limiting block under the action of centrifugal force, forming a dynamic secondary reinforcement locking that adapts to the rotational speed. The higher the rotational speed, the stronger the locking pressure, completely solving the defect of the connecting piece loosening and failing under high-speed winding conditions. The stability of equipment operation is greatly improved, solving the problem of existing equipment only using a single bolt for locking.

[0021] 2. In this invention, three sets of clamping units are evenly arranged in a ring around the center of the iron core. The second spring continuously pushes radial preload onto the sliding frame. The three sets of wheels synchronously adhere to the outer wall of the iron core, autonomously correcting the center position of the iron core, eliminating the problem of iron core clamping eccentricity, ensuring the coaxiality of the winding, improving the metering accuracy of the current transformer, and the same mechanism can adapt to various outer diameter ring iron cores. A single set of motors with two drive wheels provides auxiliary power for the rotation of the iron core, while the remaining two sets of self-driven wheels are not powered and only passively follow. The clamping force of the iron core is evenly distributed at three points, avoiding single-point pressure deformation of the iron core. The synchronous contact of multiple wheels with the outer wall of the iron core reduces local frictional resistance, and the iron core rotation process is smooth and without jamming, reducing wear on the surface of the silicon steel sheet of the iron core and protecting the magnetic conductivity of the iron core. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure at the location of the fixing frame and the timing belt of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure at the position of the spool and the release arm of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure at the location of the slide rail frame and connecting piece of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure at the position of the drive wheel and the sliding frame of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure at the position of the sliding frame and the self-driving wheel of the present invention.

[0028] The meanings of the labels in the diagram are as follows:

[0029] 1. Iron core body; 2. Mounting mechanism; 20. Fixing frame; 21. Bollard frame; 22. Transmission wheel; 23. Motor 1; 24. Synchronous belt; 25. Bollard ring; 251. Connecting piece; 26. Bollard cylinder; 27. Release arm; 28. Pressure wheel; 29. ​​Restriction groove; 210. Slide frame; 211. Sliding cylinder; 212. Pull rod; 213. Restriction block; 214. Spring 1; 215. Extension frame; 216. Contact block; 3. Positioning mechanism; 30. Mounting frame; 31. Sliding frame; 32. Spring 2; 33. Drive wheel; 34. Motor 2; 35. Self-driving wheel. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1:

[0032] Please see Figures 1-4 One embodiment of the present invention is: a coil winding device for a current transformer in a smart distribution system ring main unit, comprising an iron core body 1, and an installation mechanism 2; the installation mechanism 2 comprises a bobbin frame 21, a bobbin ring 25, a connecting piece 251, a limiting groove 29, a sliding groove frame 210, a sliding cylinder 211, a pull rod 212, a limiting block 213, a first spring 214, an expansion frame 215, and a contact block 216; the bobbin ring 25 is detachably mounted on the bobbin frame 21, and a notch is provided on the bobbin ring 25 for the iron core body 1 to be inserted, and the connecting piece 251 is mounted on the notch. For sealing the spool ring 25, a limiting groove 29 is formed on the connecting piece 251, a sliding frame 210 is fixedly installed on the outer wall of the spool ring 25, a sliding cylinder 211 is slidably assembled inside the sliding frame 210, a pull rod 212 is slidably inserted inside the sliding cylinder 211, a limiting block 213 is fixedly installed at the end of the pull rod 212, a first spring 214 is assembled between the limiting block 213 and the sliding cylinder 211, and the first spring 214 applies an elastic restoring thrust to the limiting block 213, an extension frame 215 is fixedly installed on the sliding frame 210, and an abutment block 216 is slidably assembled inside the extension frame 215 and can slide vertically along the extension frame 215.

[0033] In the above embodiments, the engagement and fastening of the limiting block 213 and the limiting groove 29 are further improved. The higher the winding speed, the greater the centrifugal force, and the stronger the clamping force of the contact block 216, so as to realize dynamic self-locking reinforcement under high-speed winding conditions and prevent the connecting piece 251 from failing to lock at high speeds.

[0034] The mounting mechanism 2 also includes a fixed frame 20, a transmission wheel 22, a motor 23, and a synchronous belt 24. The fixed frame 20 is used to support the overall installation of the bobbin frame 21. The transmission wheel 22 is rotatably mounted on the bobbin frame 21. The number of transmission wheels 22 is set to three. The motor 23 is fixedly mounted on the bobbin frame 21. The output end of the motor 23 drives the three transmission wheels 22 to rotate synchronously through the synchronous belt 24.

[0035] The mounting mechanism 2 also includes a bobbin 26; the bobbin 26 is detachably installed inside the bobbin ring 25, and the bobbin 26 is a bearing component of the copper wire winding, used for winding and bearing the copper wire to be processed.

[0036] The mounting mechanism 2 also includes a release arm 27 and a pressure wheel 28. The release arm 27 is rotatably mounted on the spool frame 21. A torsion spring is provided between the release arm 27 and the rotatable assembly position of the spool frame 21. The pressure wheel 28 is rotatably mounted on the release arm 27. Relying on the elastic restoring force of the torsion spring, the pressure wheel 28 elastically and tightly adheres to the outer surface of the spool ring 25.

[0037] In the above embodiments, the bobbin 25 is pressed tightly in real time during the winding process to counteract the tension fluctuations when the copper wire is wound, prevent the copper wire from skipping, loosening, or stacking between layers, and ensure that the winding turns are tight and uniform.

[0038] The coil winding device of the current transformer of the intelligent power distribution system ring network cabinet also includes a positioning mechanism 3, which is installed on the fixed frame 20 and is used to center and clamp the iron core body 1 during winding.

[0039] In this embodiment, during operation: the bobbin frame 21 is fixedly installed on the fixed frame 20 as the installation reference for all winding components. Multiple sets of transmission wheels 22 are rotated and assembled on the annular position of the bobbin frame 21. The motor 23 outputs power to drive the synchronous belt 24 to operate in a closed loop. The synchronous belt 24 synchronously meshes with all transmission wheels 22, realizing synchronous and uniform rotation of all transmission wheels 22. The bobbin cylinder 26 is detachably assembled on the outside of the bobbin ring 25 for pre-loading and carrying the enameled copper wire to be wound. It can be quickly replaced according to the wire diameter and core specifications. The bobbin ring 25 is detachably mounted on the transmission wheel 22 and rotates synchronously with the transmission wheel 22 to complete the winding operation of the core. The bobbin ring 25 has a notch in its ring body, and the core to be processed can be directly driven from the notch position. The core is inserted into the bobbin 25 for rapid loading and unloading. Connecting pieces 251 are movably mounted at both ends of the notch. After the core is inserted, closing the connecting pieces 251 seals the notch, making the bobbin 25 a complete annular winding carrier. This ensures no winding interference gaps around the core throughout the winding process. A release arm 27 is rotatably mounted on the bobbin holder 21. A torsion spring is installed between the release arm 27 and the bobbin holder 21, continuously applying a centripetal elastic oscillating force to the release arm 27. A pressure wheel 28 is rotatably mounted on the free end of the release arm 27. Under the elastic force of the torsion spring, the pressure wheel 28 presses tightly against the outer wall of the bobbin 25, ensuring real-time pressure on the bobbin 25 during winding. This counteracts tension fluctuations during copper wire winding, preventing wire slippage and loosening. Layer stacking ensures tight and uniform winding turns. The slide bracket 210 is fixed to the outer wall of the online shaft collar 25. The first spring 214 is assembled between the limiting block 213 and the sliding cylinder 211 and is continuously compressed. Under normal conditions, the first spring 214 pushes the limiting block 213 outward. After the closing connecting piece 251 seals the gap, the pull rod 212 is manually pulled outward to overcome the elastic force of the first spring 214, causing the limiting block 213 to retract and disengage from the movement path of the connecting piece 251. The sliding cylinder 211 slides down until the limiting block 213 and the limiting groove 29 on the connecting piece 251 are precisely aligned. After the pull rod 212 is released, the first spring 214 returns to its original position, pushing the limiting block 213 into the limiting groove 29, rigidly constraining the connecting piece 211. With 51 degrees of rotational freedom, the connecting piece 251 is prevented from loosening or the notch from reopening due to equipment vibration or accidental contact. Static locking is completed before winding. When there is no external force constraint, the abutment block 216 falls by its own weight. When the spool ring 25 rotates at high speed with the transmission wheel 22 for winding, the abutment block 216 is subjected to the centrifugal force of rotation and slides upward along the extension frame 215, eventually abutting the bottom of the limiting block 213 and continuously applying a tightening force to the limiting block 213, further improving the engagement and tightness between the limiting block 213 and the limiting groove 29. The higher the winding speed, the greater the centrifugal force and the stronger the tightening force of the abutment block 216, realizing dynamic self-locking reinforcement under high-speed winding conditions and preventing the locking failure of the connecting piece 251 at high speeds.

[0040] Example 2:

[0041] Please see Figure 1 and Figure 6Based on the above embodiments, in another embodiment of the present invention, the positioning mechanism 3 includes a mounting frame 30, a sliding frame 31, and a second spring 32; the mounting frame 30 is fixedly mounted on the fixed frame 20, the sliding frame 31 is slidably mounted on the inner side of the mounting frame 30, and the sliding frame 31 can make linear sliding movements relative to the mounting frame 30, moving closer to or away from the center of the iron core; the second spring 32 is assembled between the sliding frame 31 and the mounting frame 30, and the second spring 32 continuously provides elastic reset preload force to the sliding frame 31.

[0042] The positioning mechanism 3 also includes a drive wheel 33 and a second motor 34; the drive wheel 33 is rotatably mounted inside the sliding frame 31, and the second motor 34 is fixedly mounted on the sliding frame 31. The output end of the second motor 34 is in transmission cooperation with the drive wheel 33 to drive the drive wheel 33 to rotate actively.

[0043] The positioning mechanism 3 also includes a self-driving wheel 35; the mounting frame 30, the sliding frame 31, the second spring 32 and the second motor 34 are arranged in three sets along the circumference of the iron core center. Among them, only the single set of the second motor 34 serves as the power input source of the whole mechanism. The remaining two sets of sliding frames 31 that hold the driving unit are rotatably mounted with self-driving wheels 35. The self-driving wheels 35 have no independent driving power source and can passively follow the rotation of the iron core.

[0044] In the above embodiments, the three sets of wheels provide uniform three-point support around the circumference of the iron core, dispersing the clamping force on the iron core and preventing deformation of the iron core under single-point pressure. At the same time, the three-point limiting constraint restricts the radial runout of the iron core, ensuring the coaxiality of the iron core winding throughout the entire process, and greatly improving the winding uniformity and forming accuracy.

[0045] In this embodiment, during operation: the mounting frame 30 is fixedly assembled on the fixed frame 20. A single mounting frame 30, sliding frame 31, second spring 32, and corresponding wheel assembly constitute a radial clamping unit. The three clamping units are evenly arrayed along the circumference of the iron core center, forming a three-point surrounding positioning structure. The sliding frame 31 slides linearly along the radial direction of the mounting frame 30. The second spring 32 is positioned between the sliding frame 31 and the mounting frame 30. The second spring 32 is continuously in a pre-compressed state, pushing an elastic force towards the center of the iron core onto the sliding frame 31. The sliding frame 31 can adaptively extend and retract radially to adapt to current transformer iron cores with different outer diameters. Relying on the elastic force of the second spring 32, the wheel is made to fit against the outer wall of the iron core, automatically compensating for the outer diameter tolerance of the iron core and maintaining a centered clamping state throughout the process. Only one of the three circumferential array clamping units is equipped with a second motor 34 as a power unit to drive... The driving wheel 33 is rotatably installed inside the sliding frame 31. The second motor 34 is fixedly mounted on the sliding frame 31 and is connected to the driving wheel 33 for transmission. The output torque of the second motor 34 drives the driving wheel 33 to rotate actively. The driving wheel 33 is in contact with the outer wall of the iron core. The actively rotating driving wheel 33 can provide auxiliary circumferential driving force, reduce the rotational resistance when the iron core is rotated and ensure that the iron core rotates at a uniform speed and smoothly. The remaining two sets of circumferential array clamping units have no independent power source. They are only equipped with self-driving wheels 35 rotating inside the sliding frame 31. The self-driving wheels 35 are only in contact with the outer wall of the iron core and are passively and synchronously rotated by the friction force brought by the rotation of the iron core. The three sets of wheels are evenly supported at three points on the circumference of the iron core, which disperses the clamping force on the iron core and avoids deformation of the iron core by single point of pressure. At the same time, the three-point limit constrains the radial runout of the iron core, ensuring the coaxiality of the iron core winding throughout the entire process, and greatly improving the winding uniformity and forming accuracy.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A coil winding device for a current transformer in a ring main unit of an intelligent power distribution system, comprising an iron core body (1), characterized in that, The coil winding device of the current transformer of the intelligent power distribution system ring network cabinet also includes an installation mechanism (2). The installation mechanism (2) includes a bobbin frame (21), a bobbin ring (25), a connecting piece (251), a limiting groove (29), a sliding groove frame (210), a sliding cylinder (211), a pull rod (212), a limiting block (213), a first spring (214), an extension frame (215), and an abutment block (216). The spool ring (25) is detachably mounted on the spool frame (21). The spool ring (25) has a notch for the iron core body (1) to be inserted. The connecting piece (251) is mounted on the notch to seal the spool ring (25). The limiting groove (29) is formed on the connecting piece (251). The sliding frame (210) is fixedly mounted on the outer wall of the spool ring (25). The sliding cylinder (211) is slidably assembled inside the sliding frame (210). The pull rod (212) slides through the spool ring. Inside the sliding cylinder (211), the limiting block (213) is fixedly installed at the end of the pull rod (212). The first spring (214) is assembled between the limiting block (213) and the sliding cylinder (211). The first spring (214) applies an elastic restoring thrust to the limiting block (213). The extension frame (215) is fixedly installed on the slide frame (210). The abutment block (216) is slidably assembled inside the extension frame (215) and can slide vertically along the extension frame (215).

2. The coil winding device for the current transformer of the intelligent power distribution system ring main unit according to claim 1, characterized in that; The mounting mechanism (2) also includes a fixing frame (20), a transmission wheel (22), a motor (23), and a synchronous belt (24); The fixed frame (20) is used to support the overall installation of the bobbin frame (21). The transmission wheel (22) is rotatably mounted on the bobbin frame (21). The number of transmission wheels (22) is set to three. The motor (23) is fixedly mounted on the bobbin frame (21). The output end of the motor (23) drives the three transmission wheels (22) to rotate synchronously through the synchronous belt (24).

3. The coil winding device for the current transformer of the intelligent power distribution system ring main unit according to claim 2, characterized in that: The mounting mechanism (2) also includes a spool (26); The spool cylinder (26) is detachably installed inside the spool ring (25). The spool cylinder (26) is a bearing component of the copper wire winding and is used to wind and bear the copper wire to be processed.

4. The coil winding device for the current transformer of the intelligent power distribution system ring main unit according to claim 3, characterized in that: The installation mechanism (2) also includes a release arm (27) and a pressure wheel (28); The release arm (27) is rotatably mounted on the bobbin frame (21). A torsion spring is provided between the release arm (27) and the bobbin frame (21) at the rotatable assembly position. The pressure wheel (28) is rotatably mounted on the release arm (27). Relying on the elastic restoring force of the torsion spring, the pressure wheel (28) elastically and tightly adheres to the outer surface of the bobbin ring (25).

5. The coil winding device for the current transformer of the intelligent power distribution system ring main unit according to claim 4, characterized in that: The coil winding device of the current transformer of the intelligent power distribution system ring network cabinet also includes a positioning mechanism (3), which is installed on the fixed frame (20) and is used to center and clamp the iron core body (1) during winding.

6. The coil winding device for the current transformer of the intelligent power distribution system ring main unit according to claim 5, characterized in that: The positioning mechanism (3) includes a mounting bracket (30), a sliding bracket (31), and a second spring (32); The mounting bracket (30) is fixedly mounted on the fixed bracket (20). The sliding bracket (31) is slidably mounted on the inner side of the mounting bracket (30). The sliding bracket (31) can make a linear sliding movement relative to the mounting bracket (30) towards or away from the center of the iron core. The second spring (32) is assembled between the sliding bracket (31) and the mounting bracket (30). The second spring (32) continuously provides elastic reset preload force to the sliding bracket (31).

7. The coil winding device for the current transformer of the intelligent power distribution system ring main unit according to claim 6, characterized in that: The positioning mechanism (3) also includes a drive wheel (33) and a second motor (34). The drive wheel (33) is rotatably mounted inside the sliding frame (31), and the second motor (34) is fixedly mounted on the sliding frame (31). The output end of the second motor (34) is in transmission cooperation with the drive wheel (33) to drive the drive wheel (33) to rotate actively.

8. The coil winding device for the current transformer of the intelligent power distribution system ring main unit according to claim 7, characterized in that: The positioning mechanism (3) also includes a self-driving wheel (35); The mounting bracket (30), sliding bracket (31), second spring (32) and motor two (34) are arranged in three sets along the circumference of the iron core center. Among them, only one set of motor two (34) serves as the power input source of the whole mechanism. The remaining two sets of sliding brackets (31) that hold the driving unit are rotatably installed with the self-driving wheel (35). The self-driving wheel (35) has no independent driving power source and can passively follow the rotation of the iron core.

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