A winding tool for a current transformer

Abstract

The utility model belongs to the technical field of mutual inductor, disclose a kind of winding tool of current transformer. Each first adjusting part is matched with fixed plate snap, with the freedom of along transverse movement;Each second adjusting part is matched with each first adjusting part snap, with the freedom of along longitudinal movement;The second adjusting part in the outermost side is respectively located at the four top corners of the rectangular frame that can be length and width adjusted;Two ends of each support plate are respectively corresponding along inserted in each second adjusting part at the same height;Third adjusting part is matched with the fixed plate snap, and with the freedom of along longitudinal movement;Third adjusting part includes first side plate and second side plate being oppositely spaced;First side plate is close to winding start end setting, including several fixed holes;Second side plate is L-shaped structure, and with the freedom of along longitudinal movement.The utility model can effectively be suitable for the winding of copper band type conductor, not only high efficiency, and product appearance and insulation performance are more good.

Description

Technical Field

[0001] This utility model relates to the field of current transformer technology, specifically to a winding fixture for a current transformer. Background Technology

[0002] A current transformer is a commonly used electrical device designed based on the principle of electromagnetic induction. It is used to convert a large primary current into a small secondary current, thereby achieving current transformation and electrical isolation.

[0003] The winding is the core component of a current transformer. It requires the use of winding fixtures to wind the conductors according to a pre-designed shape, size, and number of turns to form the winding. With the iterative development of transformer structural design, the conductors of the primary winding have gradually evolved into a copper strip structure.

[0004] However, existing winding fixtures are mostly designed based on round conductor structures and cannot be effectively used for winding copper strips of various sizes corresponding to various types of current transformers. This results in low winding efficiency due to the need for frequent fixture changes during the winding process, and the outer diameter tolerance of the winding fluctuates by up to ±5mm due to the inability to achieve precise spacing adjustment, which affects the insulation performance and appearance qualification rate of the product. Utility Model Content

[0005] The purpose of this utility model is to provide a winding fixture for current transformers, which addresses the technical problems of low efficiency and low product insulation and appearance qualification rate when winding copper strip structure conductors using existing winding fixtures.

[0006] To achieve the above objectives, the present invention proposes the following technical solution:

[0007] A winding fixture for a current transformer is provided, comprising: a fixed plate, a plurality of first adjusting components, a plurality of second adjusting components, a plurality of support plates, and a third adjusting component;

[0008] Each first adjusting member is engaged with the fixed plate and has a degree of freedom to move laterally; each second adjusting member is engaged with each first adjusting member and has a degree of freedom to move longitudinally; wherein, the outermost second adjusting member is located at the four apex corners of the rectangular frame that can be adjusted in length and width; both ends of each support plate are respectively inserted into each second adjusting member at the same height.

[0009] The third adjusting member engages with the fixed plate and has a degree of freedom of movement along the longitudinal direction; wherein, the third adjusting member includes a first side plate and a second side plate arranged at relatively intervals; the first side plate is located near the starting end of the winding and includes several fixing holes; the second side plate has an L-shaped structure and has a degree of freedom of movement along the longitudinal direction.

[0010] Furthermore, the fixing plate is provided with a plurality of first rectangular holes spaced apart; the first adjusting member includes a T-shaped block, and mutually perpendicular mounting plates and adjusting plates;

[0011] The mounting plate abuts against the fixing plate; the T-shaped block is located on the side where the mounting plate abuts against the fixing plate, and is engaged in the first rectangular hole by the T-part of the T-shaped block.

[0012] Furthermore, including the first fastener, the T-shaped block and the mounting plate are a separate structure;

[0013] The first fastener is simultaneously inserted and fixed onto the mounting plate and the T-shaped block.

[0014] Furthermore, each of the first adjusting members includes a longitudinal protrusion, and each of the second adjusting members includes a U-shaped portion; the U-shaped portion is engaged and adapted to the longitudinal protrusion.

[0015] Furthermore, a second fixing member is included, wherein a second rectangular hole is provided on the longitudinal protrusion; the second fixing member passes through the U-shaped portion and is located within the second rectangular hole.

[0016] Furthermore, a groove is formed longitudinally on the fixed plate, and the third adjusting member is inserted into the groove.

[0017] Furthermore, a third fixing member is included, and a first through groove is formed on the third adjusting member along the longitudinal direction. The third fixing member passes through the groove and is located in the first through groove.

[0018] Furthermore, it includes four second adjusting members, and each second adjusting member has an arc-shaped chamfer near the corresponding top corner of the rectangular frame.

[0019] Furthermore, the third adjusting member includes a protrusion, and the second side plate is provided with a second through groove, which is engaged and adapted to the protrusion.

[0020] Furthermore, a fourth fastener is included, which passes through the protrusion and is located within the second through groove.

[0021] Beneficial effects:

[0022] This technical solution provides a winding fixture suitable for current transformer windings with copper strip structure to solve the problems of low efficiency and poor product quality when using existing fixtures for winding.

[0023] The tooling includes a fixed plate that cooperates with each other, several first adjusting members, several second adjusting members, several support plates, and a third adjusting member. Each first adjusting member engages with the fixed plate and has a degree of freedom of movement in the lateral direction; each second adjusting member engages with each first adjusting member and has a degree of freedom of movement in the longitudinal direction; wherein, the outermost second adjusting members are located at the four apex corners of a rectangular frame that can be adjusted in length and width; both ends of each support plate are respectively inserted into each of the second adjusting members at the same height. The third adjusting member engages with the fixed plate and has a degree of freedom of movement in the longitudinal direction; wherein, the third adjusting member includes a first side plate and a second side plate arranged at relatively intervals; the first side plate is located near the starting end of the winding and includes several fixing holes; the second side plate has an L-shaped structure and has a degree of freedom of movement in the longitudinal direction.

[0024] When winding is required, firstly, the first adjusting member is adjusted laterally according to the transformer model, and the second adjusting member is adjusted longitudinally so that the rectangular frame defined by each second adjusting member is consistent with the inner dimension of the target winding, and a support plate of appropriate length is inserted. Then, the pre-welded winding start-side terminal is fixed to the fixing hole of the first side plate using locking members, and the height of the third adjusting member is adjusted so that the winding start-side is attached to the support plate. At this time, copper strip is wound on the rectangular frame formed by the second adjusting member and the support plate according to the preset number of turns. After winding, the winding end is placed on the L-shaped second side plate to facilitate its shaping, and the winding end-side terminal is welded. This not only effectively increases the winding speed but also effectively shapes the copper strip, improves the consistency of the copper strip spacing at various positions, and ensures both appearance qualification rate and insulation performance.

[0025] It should be understood that all combinations of the foregoing concepts and the additional concepts described in more detail below can be considered as part of the utility model subject matter of this disclosure, provided that such concepts do not contradict each other.

[0026] The foregoing and other aspects, embodiments, and features of the present invention will be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as features and / or beneficial effects of exemplary embodiments, will become apparent from the following description or may be learned through practice of specific embodiments according to the teachings of the present invention. Attached Figure Description

[0027] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component shown in the various figures may be denoted by the same reference numeral. For clarity, not every component is labeled in each figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings, wherein:

[0028] Figure 1 This is a schematic diagram of the winding fixture for the current transformer described in this embodiment;

[0029] Figure 2 This is a schematic diagram of the winding fixture for the current transformer described in this embodiment from another angle;

[0030] Figure 3 This is a schematic diagram of the winding structure manufactured using the winding fixture described in this embodiment;

[0031] Figure 4 This is a schematic diagram of the structure of the winding fixture and the wound winding of the current transformer described in this embodiment.

[0032] The reference numerals in the figure are as follows: 1 is a fixing plate, 2 is a first adjusting component, 3 is a second adjusting component, 4 is a support plate, 5 is a third adjusting component, 6 is a first fixing component, 7 is a second fixing component, 8 is a third fixing component, 9 is a fourth fixing component, 10 is a terminal; 11 is a first rectangular hole, 12 is a groove, 21 is a T-shaped block, 22 is a mounting plate, 23 is an adjusting plate, 31 is a U-shaped part, 51 is a first side plate, 52 is a second side plate, 53 is a first through groove; 23a is a longitudinal protrusion, 51a is a fixing hole, and 52a is a second through groove. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this utility model pertains.

[0034] The terms "first," "second," and similar words used in this utility model patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, unless the context clearly indicates otherwise, the singular forms of "an," "a," or "the," etc., do not indicate a quantity limitation, but rather indicate the presence of at least one. Terms such as "comprising" or "including" indicate that the element or object preceding "comprising" encompasses the features, integrals, steps, operations, elements, and / or components listed following "comprising" or "including," and do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or collections thereof. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0035] Currently, most current transformers use copper strip structures for their primary coils, leading to the following defects in traditional rewinding fixtures during winding: (1) the fixture structure does not match the shape of the copper strip, making precise positioning impossible; (2) the spacing of the copper strips relies on manual experience for adjustment, and frequent fixture changes are required according to the transformer model, resulting in low winding efficiency (the industry average time is about 3.5 hours per piece); (3) the outer diameter tolerance of the wound coil fluctuates by ±5mm, affecting the insulation performance and appearance qualification rate of the product. Based on this, this embodiment aims to provide a winding fixture for current transformers to simultaneously solve the above-mentioned technical defects.

[0036] The winding fixture for the current transformer disclosed in this utility model will be further described in detail below with reference to the embodiments shown in the accompanying drawings.

[0037] Combination Figures 1-4 As shown, the tooling includes a fixed plate 1 that cooperates with each other, a plurality of first adjusting parts 2, a plurality of second adjusting parts 3, a plurality of support plates 4 and a third adjusting part 5.

[0038] Specifically, each of the first adjusting members 2 engages with the fixed plate 1 and has a degree of freedom of movement in the lateral direction. In one specific embodiment, the fixed plate 1 has a plurality of first rectangular holes 11 spaced apart; the first adjusting member 2 includes a T-shaped block 21, and mutually perpendicular mounting plates 22 and adjusting plates 23. The mounting plate 22 abuts against the fixed plate 1, and the T-shaped block 21 is located on the side where the mounting plate 22 abuts against the fixed plate 1, and is engaged within the first rectangular holes 11 by the T-part of the T-shaped block 21. Further, the T-shaped block 21 and the mounting plate 22 are separate structures; a first fixing member 6 is simultaneously inserted and fixed to both the mounting plate 22 and the T-shaped block 21, thereby locking the mounting plate 22 and the T-shaped block 21 to achieve the limiting and fixing of the first adjusting member 2 relative to the fixed plate 1 at the target position. In this embodiment, the first fixing member 6 is specifically a screw.

[0039] Each second adjusting member 3 engages with each first adjusting member 2 and has a degree of freedom of movement along the longitudinal direction. The outermost second adjusting members 3 are located at the four apex corners of the rectangular frame, which allows for length and width adjustment. This embodiment includes four second adjusting members 3, which engage with different first adjusting members 2 in pairs. In one specific implementation, each first adjusting member 2 includes a longitudinal protrusion 23a, and each second adjusting member 3 includes a U-shaped portion 31; the U-shaped portion 31 engages with the longitudinal protrusion 23a to achieve the engagement between the first adjusting member 2 and the second adjusting member 3. Furthermore, a second fixing member 7 is included. A second rectangular hole is formed on the longitudinal protrusion 23a, and the second fixing member 7 passes through the U-shaped portion 31 and is located within the second rectangular hole to limit and fix the second adjusting member 3 relative to the first adjusting member 2 at the target position. In this embodiment, the second fixing member 7 is specifically a screw. At this time, both ends of each support plate 4 are respectively inserted into each second adjusting member 3 at the same height. In this embodiment, in order to be compatible with different types of current transformers, the support plate 4 here has various lengths to meet the winding requirements of copper strip windings of corresponding sizes.

[0040] The third adjusting member 5 engages with the fixed plate 1 and has a longitudinal degree of freedom of movement. The third adjusting member 5 includes a first side plate 51 and a second side plate 52 spaced apart from each other. The first side plate 51 is located near the starting end of the winding and includes several fixing holes 51a; the second side plate 52 has an L-shaped structure and a longitudinal degree of freedom of movement. In one specific embodiment, a groove 12 is formed on the fixed plate 1 along the longitudinal direction, and the third adjusting member 5 is inserted into the groove 12 to achieve relative movement relative to the fixed plate 1. It also includes a third fixing member 8. A first through groove 53 is formed on the third adjusting member 5 along the longitudinal direction, and the third fixing member 8 passes through the groove 12 and is located within the first through groove 53 to limit and fix the third adjusting member 5 relative to the fixed plate 1 at a target position. In another specific embodiment, the third adjusting member 5 includes a protrusion, and the second side plate 52 has a second through groove 52a, which engages with the protrusion to achieve relative positional movement of the second side plate 52. Additionally, a fourth fixing member 9 is included, which passes through the protrusion and is located within the second through groove 52a to limit and fix the second side plate 52 relative to the third adjusting member 5 at the target position. In this embodiment, both the third fixing member 8 and the fourth fixing member 9 are screws.

[0041] In practical implementation, firstly, the first adjusting member 2 is adjusted laterally according to the transformer model, and the second adjusting member 3 is adjusted longitudinally so that the rectangular frame defined by each second adjusting member 3 is consistent with the inner dimension of the target winding, and a support plate 4 of corresponding length is inserted. Then, the pre-welded winding start-up side terminal 10 is fixed to the fixing hole 51a of the first side plate 51 through the locking member, and the height of the third adjusting member 5 is adjusted so that the winding start-up side is attached to the support plate 4. At this time, copper strip is wound on the rectangular frame formed by the second adjusting member 3 and the support plate 4 according to the preset number of turns, and after winding, the winding termination end is placed on the L-shaped second side plate to facilitate its shaping, and the termination end terminal 10 is welded. This not only effectively improves the winding speed, but also effectively shapes the copper strip, improves the consistency of the copper strip spacing at various positions, and ensures both appearance qualification rate and insulation performance.

[0042] As a preferred embodiment, in order to further improve the plasticity of the copper strip, each of the second adjusting members 3 is provided with an arc-shaped chamfer near the corresponding top corner of the rectangular frame.

[0043] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A winding fixture for a current transformer, characterized in that, include: A fixed plate, several first adjusting components, several second adjusting components, several support plates, and a third adjusting component; Each first adjusting member is engaged with the fixed plate and has a degree of freedom to move laterally; each second adjusting member is engaged with each first adjusting member and has a degree of freedom to move longitudinally; wherein, the outermost second adjusting member is located at the four apex corners of the rectangular frame that can be adjusted in length and width; both ends of each support plate are respectively inserted into each second adjusting member at the same height. The third adjusting member engages with the fixed plate and has a degree of freedom of movement along the longitudinal direction; wherein, the third adjusting member includes a first side plate and a second side plate arranged at relatively intervals; the first side plate is located near the starting end of the winding and includes several fixing holes; the second side plate has an L-shaped structure and has a degree of freedom of movement along the longitudinal direction.

2. The winding fixture for a current transformer according to claim 1, characterized in that, The fixing plate is provided with a plurality of first rectangular holes spaced apart; the first adjusting component includes a T-shaped block, and a mounting plate and an adjusting plate that are perpendicular to each other; The mounting plate abuts against the fixing plate; the T-shaped block is located on the side where the mounting plate abuts against the fixing plate, and is engaged in the first rectangular hole by the T-part of the T-shaped block.

3. The winding fixture for a current transformer according to claim 2, characterized in that, Including the first fixing member, the T-shaped block and the mounting plate are separate structures; The first fastener is simultaneously inserted and fixed onto the mounting plate and the T-shaped block.

4. The winding fixture for a current transformer according to claim 1, characterized in that, Each first adjusting member includes a longitudinal protrusion, and each second adjusting member includes a U-shaped portion; the U-shaped portion is engaged and adapted to the longitudinal protrusion.

5. The winding fixture for a current transformer according to claim 4, characterized in that, It includes a second fastener, on which a second rectangular hole is provided; the second fastener passes through the U-shaped part and is located inside the second rectangular hole.

6. The winding fixture for a current transformer according to claim 1, characterized in that, A groove is formed along the longitudinal direction on the fixed plate, and the third adjusting member is inserted into the groove.

7. The winding fixture for a current transformer according to claim 6, characterized in that, It includes a third fixing member, and a first through groove is formed on the third adjusting member along the longitudinal direction. The third fixing member passes through the groove and is located in the first through groove.

8. The winding fixture for a current transformer according to claim 1, characterized in that, It includes four second adjustment components, and each second adjustment component has an arc-shaped chamfer near the corresponding top corner of the rectangular frame.

9. The winding fixture for a current transformer according to claim 1, characterized in that, The third adjusting member includes a protrusion, and the second side plate is provided with a second through groove, which is engaged and adapted to the protrusion.

10. The winding fixture for a current transformer according to claim 9, characterized in that, It includes a fourth fastener that passes through the protrusion and is located within the second through groove.

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