Tool for clamping and correcting self-adhesive transposed conductor

Abstract

The utility model discloses a tool for clamping and correcting a self-adhesive transposed conductor, and relates to a tool for clamping and correcting a self-adhesive transposed conductor of a transformer coil. The self-adhesive transposed conductor is mainly designed for solving the problem that the current self-adhesive transposed conductor is easy to twist and deform in the winding process. The device comprises a bottom plate, supporting plates are arranged at the left end and the right end of the bottom plate, front grooves and rear grooves are formed in the front end faces and the rear end faces of the supporting plates, and upper grooves are formed in the upper surfaces of the supporting plates. A front nylon roller set, a rear nylon roller set and a guide wheel are arranged between the two supporting plates, the guide wheel is connected to a guide wheel shaft, and threads at the two ends of the guide wheel shaft extend out of the upper grooves and then are screwed with nuts. Threads at two ends of a wheel shaft of the nylon roller group extend out from the front groove or the rear groove, and nuts and gaskets are screwed on the extending parts; the wheel core is installed on the wheel shaft through a deep groove ball bearing, and the nylon idler wheels and the wheel core are embedded together in an interference fit mode. The nylon rollers are in a step shape, and a clamping groove is formed in the space between every two adjacent nylon rollers. The advantage is that deviation of the wire can be restrained.

Description

Technical fields:

[0001] This utility model relates to a tooling for clamping and correcting self-adhesive transposition wires of transformer coils. Background technology:

[0002] To improve the economic efficiency of transformers and enhance their short-circuit withstand capability, self-adhesive transposed conductors are often used in the winding process. These conductors consist of several enameled flat copper wires continuously wrapped with a specific insulating material. This structure not only improves the space utilization of the windings but also enhances their mechanical and electrical strength.

[0003] During the transformer coil winding process, the winding spool is first placed on a pay-off stand, and then the self-adhesive transposed conductor is passed through the winding machine for various winding methods. Due to the structural characteristics of this conductor, its cross-section is not a uniform rectangle, and larger gauge conductors are used for winding in large-capacity transformers. Large gauge conductors are prone to misalignment during winding due to their inherent structure, leading to coil winding deviations and making it difficult to maintain a uniform and stable wire feeding speed.

[0004] Furthermore, the diameter of the winding spool varies depending on the specifications of the self-adhesive transposition conductor. During the winding process, the self-adhesive transposition conductor transitions from the winding spool to the mold on the winding machine. Due to the change in diameter between the two, a certain arc is formed during the transition of the transposition conductor. If there is no supporting mechanism in between, it is very easy for the conductor to twist and deform, and for the outer insulation to crack. Summary of the Invention:

[0005] The technical problem to be solved by this utility model is to provide a tooling for clamping and correcting self-adhesive transposition wires. This tooling can make full use of mechanical principles between the winding shaft and the winding machine to avoid areas of excessive tension concentration in the wires. It can also correct the transverse and longitudinal directions of the self-adhesive transposition wires, constrain the deviation of the wires, and ensure uniform force.

[0006] The purpose of this utility model is achieved as follows: it includes a base plate, and the left and right ends of the base plate are connected to upwardly extending support plates, the base plate and the support plates forming a support; several reinforcing ribs are welded between the base plate and the support plates.

[0007] The two support plates have the same structure. Each support plate has a groove that is recessed into the front and rear surfaces. The two grooves are a front groove and a rear groove, which are at the same horizontal height. Each support plate has a downward recessed upper groove in the middle of its upper surface.

[0008] Between the two support plates are two sets of nylon rollers and guide wheels. The two sets of nylon rollers are connected to the front and rear grooves of the two support plates by shafts, respectively. The guide wheels are connected to the guide wheel shaft by tin bronze bushings. Each end of the guide wheel shaft has a thread of equal length. The threads at both ends of the guide wheel shaft extend from the upper grooves of the two support plates. Washers and nuts are screwed onto the extended parts to achieve positioning.

[0009] The nylon roller assembly includes an axle with a thread of equal length at each end. The threads at both ends of the axle extend from the front or rear grooves of the two support plates, and nuts and washers are screwed onto the extended portions to prevent lateral displacement. The wheel core is mounted on the axle via a deep groove ball bearing, and several nylon rollers are interlocked with the wheel core.

[0010] The nylon roller is stepped, meaning it consists of a large-diameter wheel body and a small-diameter wheel body. The small-diameter wheel body of the nylon roller contacts the large-diameter wheel body of the adjacent nylon roller. The space between the large-diameter wheel bodies of two adjacent nylon rollers is a clamping groove, and the bottom of the clamping groove is the small-diameter wheel body of the nylon roller.

[0011] The width of the clamping groove is the width of the small-diameter wheel body of the nylon roller. This width is manufactured according to the smaller self-adhesive transposition wire gauge. If a wider wire needs to be wound, the width of the clamping groove can be increased by adding a nylon washer to the wheel core between two adjacent nylon rollers. That is, the two sides of the nylon washer are respectively attached to the large-diameter wheel body of the nylon roller on one side and the small-diameter wheel body of the nylon roller on the other side. The outer diameter of the nylon washer is the same as the outer diameter of the small-diameter wheel body of the nylon roller. In this way, the overall width of the nylon washer and the original clamping groove is the width of the self-adhesive transposition wire to be wound.

[0012] The advantages of this invention are: the nylon roller and the wheel core are embedded as one piece, which enhances the connection between the nylon roller and the wheel core, and prevents the material layer from falling off the surface during use, thereby extending the service life of the roller.

[0013] Nylon rollers have higher wear resistance than rollers made of other materials, which allows them to maintain good performance during long-term use, reducing replacement frequency and lowering costs. The self-lubricating properties of nylon rollers reduce maintenance needs, and their low density not only reduces overall weight but also helps reduce mechanical energy consumption, achieving lightweight machinery.

[0014] The axles of the nylon roller assembly are threaded at both ends and are axially fixed by nuts and washers to prevent axial displacement during use.

[0015] The guide wheel can be adjusted vertically via the upper groove in the middle of the support. This allows for a smooth transition between the three supports, facilitating the clamping and orientation correction of the self-adhesive transposition wire.

[0016] This device fully utilizes mechanical principles between the winding shaft and the winding machine to avoid areas of excessive tension concentration in the conductor, and it can also correct the lateral and longitudinal directions of the self-adhesive transposition conductor, constraining the deviation of the conductor and ensuring uniform and consistent force. Attached image description:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the rear view structure of this utility model;

[0019] Figure 3 This is a rear view structural diagram of the present invention with nylon washers installed;

[0020] Figure 4 This is a side view of the nylon roller in this utility model. Detailed implementation method:

[0021] The following combination Figure 1-4 The present invention will be further described below;

[0022] It includes a base plate 1, with upwardly extending support plates 2 connected to the left and right ends of the base plate, and the base plate and support plates forming a support; several reinforcing ribs 3 are welded between the base plate and the support plates.

[0023] The two support plates have the same structure. Each support plate has a groove that is recessed into the front and rear surfaces. The two grooves are a front groove 4 and a rear groove 5, which are at the same horizontal height. Each support plate has a downward recessed upper groove 6 in the middle of its upper surface.

[0024] Between the two support plates are two sets of nylon rollers and guide wheels 7. The two sets of nylon rollers are connected to the front and rear grooves of the two support plates by shafts, respectively. The guide wheels are connected to the guide wheel shaft 13 by tin bronze bushings. Each end of the guide wheel shaft has a thread of equal length. The threads at both ends of the guide wheel shaft extend from the upper grooves of the two support plates. Washers and nuts are screwed onto the extended parts to achieve positioning.

[0025] The nylon roller assembly includes a wheel axle 8, with a thread of equal length at each end of the wheel axle. The threads at both ends of the wheel axle extend from the front or rear grooves of the two support plates, and the extended parts are screwed with nuts and washers to prevent lateral displacement. The wheel core 9 is mounted on the wheel axle 8 through a deep groove ball bearing, and several nylon rollers 10 are interlocked with the wheel core.

[0026] The nylon rollers are stepped, meaning the nylon roller 10 comprises two parts: a large-diameter wheel body 101 and a small-diameter wheel body 102. The small-diameter wheel body of the nylon roller contacts the large-diameter wheel body of the adjacent nylon roller. The space between the large-diameter wheel bodies of two adjacent nylon rollers is a clamping groove 11, and the bottom of the clamping groove is the small-diameter wheel body of the nylon roller. For example, three clamping grooves can be formed between four nylon rollers.

[0027] The width of the clamping groove is the width of the small-diameter wheel body of the nylon roller. This width is manufactured according to the smaller self-adhesive transposition wire gauge. If a wider wire needs to be wound, the width of the clamping groove can be increased by adding a nylon washer 12 on the wheel core between two adjacent nylon rollers. That is, the two sides of the nylon washer are respectively attached to the large-diameter wheel body of the nylon roller on one side and the small-diameter wheel body of the nylon roller on the other side. The outer diameter of the nylon washer is the same as the outer diameter of the small-diameter wheel body of the nylon roller. In this way, the overall width of the nylon washer and the original clamping groove is the width of the self-adhesive transposition wire to be wound.

[0028] The guide wheel is a nylon wheel, and its main functions are support and guidance. Its height can be adjusted vertically via the upper groove in the center of the support.

[0029] Work process:

[0030] During the winding process of transformer coils, the winding shafts placed from back to front are mounted on the pay-off frame. This device is called a winding machine.

[0031] First, place the winding spool of the self-adhesive transposition conductor on the pay-off frame. Then, align the wire to be wound according to the required number of turns. During winding, the wire passes through the clamping groove of the nylon roller assembly on the fixture. By clamping and correcting the wire, the corrected wire is fed to the winding die of the winding machine for different types of winding.

[0032] The position of the rollers needs to be adjusted according to different wire gauges. The nylon roller assemblies at both ends can be adjusted forward and backward in the front and rear grooves, while the guide wheel in the middle can be adjusted vertically. This allows the three supports to form a smooth transition, which is more conducive to clamping the wire and correcting its direction.

[0033] The wheel core is made of tin bronze. This bronze, with tin as the main alloying element, has excellent corrosion resistance, wear resistance, and high airtightness, making it a suitable material for wear-resistant bushings. The outer surface of the nylon roller is made of nylon. Nylon has high strength, is not easily worn or torn, has good elasticity, is a lightweight material, and has certain insulation properties, so it will not damage the paper insulation of the transposed conductor.

[0034] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fixture for clamping and correcting self-adhesive transposition wires, comprising a base plate (1), wherein the left and right ends of the base plate are connected to upwardly extending support plates (2), and the base plate and the support plates form a support; characterized in that: The two support plates have the same structure. Each support plate has a groove that is recessed into the support plate on its front and rear faces. The two grooves are a front groove (4) and a rear groove (5). The front groove and the rear groove are at the same horizontal height. Each support plate has a downward recessed upper groove (6) in the middle of its upper surface. Two sets of nylon rollers and guide wheels (7) are provided between the two support plates. The two sets of nylon rollers are connected to the front and rear grooves of the two support plates by axles respectively. The guide wheels are connected to the guide wheel shaft (13) by tin bronze bushings. Each end of the guide wheel shaft has a thread of equal length. The threads at both ends of the guide wheel shaft extend from the upper grooves of the two support plates. Washers and nuts are screwed onto the extended parts. The nylon roller assembly includes a wheel axle (8), each end of the wheel axle has a thread of equal length, the threads at both ends of the wheel axle extend from the front or rear grooves corresponding to the two support plates, and the extended part is screwed with a nut and a washer. The wheel core (9) is mounted on the wheel axle (8) via a deep groove ball bearing, and several nylon rollers (10) are interlocked with the wheel core; The nylon roller is stepped, that is, the nylon roller (10) includes two parts: a large diameter wheel body (101) and a small diameter wheel body (102). The small diameter wheel body of the nylon roller contacts the large diameter wheel body of the adjacent nylon roller, and the space between the large diameter wheel bodies of the two adjacent nylon rollers is a clamping groove (11).

2. The tooling for clamping and correcting self-adhesive transposition wires according to claim 1, characterized in that: in A nylon washer (12) is added to the wheel core between two adjacent nylon rollers. The two sides of the nylon washer are respectively attached to the large diameter wheel body of the nylon roller on one side and the small diameter wheel body of the nylon roller on the other side. The outer diameter of the nylon washer is consistent with the outer diameter of the small diameter wheel body of the nylon roller.

3. The tooling for clamping and correcting self-adhesive transposition wires according to claim 1 or 2, characterized in that: Several reinforcing ribs are welded between the base plate and the support plate (3).

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