Low-voltage copper bar flexible connection lead structure

Abstract

The utility model discloses a low-voltage copper bar flexible connection lead structure which comprises a copper foil body, the copper foil body is wound to form a winding, wire outlet structures are arranged at the head end and the tail end of the copper foil body, flexible connection copper bars are welded on the wire outlet structures, and the flexible connection copper bars corresponding to the head end and the tail end of the copper foil body transversely extend in opposite directions and then are bent upwards. One end, far away from the wire outlet structure, of the flexible connection copper bar is connected with a conducting rod of the transformer; the wire outlet structures corresponding to the head end and the tail end of the copper foil body are directly welded with the flexible connection copper bar, so that the connection reliability of the flexible connection copper bar and the wire outlet structures is improved; and the flexible connection copper bars transversely extend in the opposite direction and then are bent upwards, so that bolt connection between the transverse copper bars and the vertical copper bars is omitted, and stable operation of the power transformer is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a low-voltage copper busbar soft connection lead structure. Background Art

[0002] In the prior art, the outgoing wire structure at both ends of the power transformer winding is first connected to a horizontally extending copper bar by bolts, and then another vertically extending copper bar is fixedly connected to the end of the horizontally extending copper bar by bolts. The vertically extending copper bar is connected to the conductive rod of the transformer. The horizontally extending copper bar can ensure that the conductive rods connected to the ends of the winding are staggered, which helps to reduce electromagnetic interference and short circuit risks. However, due to the action of electromagnetic force and the influence of external environmental factors, the transformer will produce a certain amount of vibration. This vibration will act on the bolts for a long time, causing the bolts to loosen. When the bolts are loose, gaps will appear between the contact surfaces that should be tightly fitted, resulting in loose contact between the contact surfaces. This will cause the outgoing wire structure to have poor contact with the copper bar, affecting the resistance, causing the current and voltage of the power transformer to fluctuate, and affecting the stable operation of the power transformer. Utility Model Content

[0003] The purpose of the utility model is to improve and innovate the shortcomings and problems existing in the background technology and provide a low-voltage copper busbar soft connection lead structure.

[0004] A low-voltage copper busbar flexible connection lead structure includes a copper foil body, the copper foil body is wound to form a winding, and the copper foil body is provided with an outlet structure at both ends. A flexible connection copper busbar is welded to the outlet structure. The flexible connection copper busbars corresponding to the two ends of the copper foil body extend laterally in opposite directions and then bend upward. The end of the flexible connection copper busbar away from the outlet structure is connected to the conductive rod of the transformer.

[0005] A further solution is that the flexible connection copper busbar is composed of a plurality of bent copper foil sheets; the bent copper foil sheets are welded together.

[0006] A further solution is that the end of the copper foil body is cut along its length direction to obtain a number of separated foils, and the foils remain connected to the copper foil body, and the foils are bent and overlapped to form an outlet structure.

[0007] A further solution is that the outer surface of the connection between the outgoing wire structure and the copper foil body is wrapped with insulating paper, and the outer surface of the insulating paper is wrapped with a first adhesive strip.

[0008] A further solution is that a second adhesive strip is further provided on the outer surface of the insulating paper, the middle portion of the second adhesive strip is bonded to the outer surface of the insulating paper, and the end of the second adhesive strip is bonded to the foil.

[0009] A further solution is that both the first adhesive strip and the second adhesive strip are double-sided adhesive tapes.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) the corresponding outgoing wire structures at both ends of the copper foil body of the present invention are directly welded to the flexible copper busbar, thereby improving the connection reliability between the flexible copper busbar and the outgoing wire structure; and the flexible copper busbar is bent upward after being extended in the opposite direction, thereby eliminating the need for bolt connection between the horizontal copper busbar and the vertical copper busbar, which is beneficial to the stable operation of the power transformer;

[0011] (2) The utility model forms a wire-out structure by bending and overlapping the foils; thereby eliminating the need to weld a rectangular copper plate to the end of the copper foil, making the winding wire-out structure easy to process and preventing burrs from being formed to affect the insulation performance of the transformer winding; insulating paper is wrapped around the outer surface of the connection between the wire-out structure and the copper foil body, and the insulating paper can prevent a short circuit between the wire-out structure and the iron core; by providing a first adhesive strip and a second adhesive strip, the insulating paper and the foil are bonded together, which can well fix the position of the insulating paper and prevent the insulating paper from sliding on the wire-out structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0013] Figure 1 A schematic diagram of the main structure provided by an embodiment of the utility model;

[0014] Figure 2 A side view schematic diagram of the structure provided by an embodiment of the utility model;

[0015] Figure 3 A schematic top view of the copper foil body and the lead-out structure provided in an embodiment of the present invention;

[0016] Figure 4 This is a schematic diagram of the main structure of the copper foil body and the lead-out structure provided by an embodiment of the present utility model;

[0017] Figure 5 This is a schematic structural diagram of the flexible connection copper busbar provided in an embodiment of the present utility model.

[0018] Reference numerals: winding 1 , copper foil body 2 , outgoing wire structure 3 , foil 31 , insulating paper 32 , second adhesive strip 33 , flexible connecting copper bus 4 . DETAILED DESCRIPTION

[0019] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0020] It should be noted that when an element is referred to as being “fixed to” another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended solely for the purpose of describing specific embodiments and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] See also Figure 1-Figure 2 and Figure 5 The present invention provides a low-voltage copper busbar soft connection lead structure, including a copper foil body 2, and the copper foil body 2 is wound by a winding machine to obtain a winding 1. The copper foil body 2 is provided with an outgoing wire structure 3 at both ends, that is, the winding 1 is provided with an outgoing wire structure 3 at both ends. The outgoing wire structure 3 is directly welded with a soft connection copper busbar 4. By directly welding the outgoing wire structure 3 corresponding to the copper foil body 2 at both ends and the soft connection copper busbar 4 together, when the power transformer vibrates, it will not cause loosening between the outgoing wire structure 3 and the soft connection copper busbar 4. Compared with the traditional bolt connection, the present application can improve the connection reliability between the soft connection copper busbar 4 and the outgoing wire structure 3, and the current and voltage fluctuations of the power transformer are small, which is conducive to the stable operation of the power transformer; and the soft connection copper busbar 4 corresponding to the copper foil body 2 at both ends extend horizontally in the opposite direction and then bend upward, and the end of the soft connection copper busbar 4 away from the outgoing wire structure 3 is then connected to the conductive rod of the transformer. Since the flexible copper busbar 4 is bent upward directly after being extended in the opposite direction, the conventional bolt connection between the horizontal copper busbar and the vertical copper busbar is omitted, which is further beneficial to the stable operation of the power transformer.

[0023] It should be noted that the flexible connecting copper busbar 4 is composed of a number of bent copper foils; the bent copper foils are welded together by a layer welding machine.

[0024] See also Figure 3-Figure 4The end of the copper foil body 2 is cut along its length to obtain a plurality of separate foil pieces 31. Specifically, a cutting line extending along the length of the copper foil body 2 can be provided at the end of the copper foil body 2. The copper foil body 2 is directly cut along the cutting line to obtain a plurality of separate foil pieces 31. It should be noted that the foil pieces 31 remain connected to the copper foil body 2.

[0025] Furthermore, the foil 31 is bent at 90 degrees and overlapped to form the wire-outlet structure 3. It is understandable that, since the foil 31 remains connected to the copper foil body 2, the present application does not require welding the foil 31 to the copper foil body 2, thereby eliminating the welding process. This makes the winding wire-outlet structure 3 easy to process and prevents the formation of burrs that would affect the insulation performance of the transformer winding.

[0026] Furthermore, the outer surface of the connection between the outgoing wire structure 3 and the copper foil body 2 is wrapped with insulating paper 32, and the outer surface of the insulating paper 32 is wrapped with a first adhesive strip, which is not shown in the figure and is a double-sided tape. The insulating paper 32 ensures the safety and insulation of the connection to avoid short circuit caused by contact between the outgoing wire structure 3 and the iron core. The first adhesive strip can strengthen the connection between the insulating paper 32 and the outgoing wire structure 3 to prevent the insulating paper 32 from spreading or loosening due to factors such as vibration and temperature changes. The outer surface of the insulating paper 32 is also provided with a second adhesive strip 33, which is also a double-sided tape. The middle part of the second adhesive strip 33 is bonded to the outer surface of the insulating paper 32, and the end of the second adhesive strip 33 is bonded to the foil 31. On the basis of setting the first adhesive strip, a second adhesive strip 33 is set. In this way, since the second adhesive strip 33 bonds the insulating paper 32 and the foil 31 together, the position of the insulating paper 32 can be well fixed to prevent the insulating paper 32 from sliding on the outgoing line structure 3.

[0027] Specifically, four second adhesive strips 33 are provided, arranged in pairs on the upper and lower surfaces of the outlet structure 3. Two second adhesive strips 33 on the same side of the outlet structure 3 can be arranged parallel to each other on the foil 31; or two second adhesive strips 33 on the same side of the outlet structure 3 can be arranged crosswise on the foil 31. The parallel arrangement helps ensure uniform and stable bonding; the cross-arrangement provides tension in multiple directions, thereby more effectively resisting stress and vibration from different directions.

[0028] The working process of the present invention is as follows: the staff first cuts the end of the copper foil body 2 to obtain several separated foils 31, then bends each foil 31 90° in turn, and hits the foil 31 with a hammer to make the surface of the foil 31 flat and tightly fit together; cuts off the uneven part of the foil 31 away from the copper foil body 2, so that the end of the wire-outlet structure 3 is flush; then wraps the insulating paper 32 around the outer surface of the wire-outlet structure 3 for multiple turns, and uses double-sided tape to wrap around the outer surface of the insulating paper 32 for multiple turns to prevent the insulating paper 32 from spreading and sliding; then uses double-sided tape to bond the insulating paper 32 and the foil 31 surface together, and fixes the position of the insulating paper 32 with the edge; then uses a winder to wind the copper foil body 2 to obtain the winding 1; finally, the flexible connection copper bus 4 is directly welded to the wire-outlet structure 3.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the utility model.

[0030] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0031] Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Mentioning "embodiments" in this article means that the specific features, structures or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present embodiment application. The appearance of this phrase in various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It can be understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application. Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purpose of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A low-voltage copper busbar flexible connection lead structure, characterized in that The invention comprises a copper foil body (2), wherein the copper foil body (2) is wound to obtain a winding (1), wherein an outlet structure (3) is provided at both ends of the copper foil body (2), and a flexible copper busbar (4) is welded to the outlet structure (3), wherein the flexible copper busbars (4) corresponding to the two ends of the copper foil body (2) extend laterally in opposite directions and then bend upwards, and the end of the flexible copper busbar (4) away from the outlet structure (3) is connected to a conductive rod of a transformer.

2. A low-voltage copper busbar flexible connection lead structure according to claim 1, characterized in that The flexible connection copper busbar (4) is composed of a plurality of bent copper foil sheets; the bent copper foil sheets are welded together.

3. A low-voltage copper busbar flexible connection lead structure according to claim 1, characterized in that The end of the copper foil body (2) is cut along its length direction to obtain a plurality of mutually separated foil pieces (31), and the foil pieces (31) remain connected to the copper foil body (2). The foil pieces (31) are bent and overlapped to form an outlet structure (3).

4. A low-voltage copper busbar flexible connection lead structure according to claim 3, characterized in that The outer surface of the connection between the outlet structure (3) and the copper foil body (2) is wrapped with insulating paper (32), and the outer surface of the insulating paper (32) is wrapped with a first adhesive strip.

5. A low-voltage copper busbar flexible connection lead structure according to claim 4, characterized in that The outer surface of the insulating paper (32) is further provided with a second adhesive strip (33), the middle portion of the second adhesive strip (33) is bonded to the outer surface of the insulating paper (32), and the end portion of the second adhesive strip (33) is bonded to the foil (31).

6. The low-voltage copper busbar flexible connection lead structure according to claim 5, characterized in that: The first adhesive strip and the second adhesive strip (33) are both double-sided adhesive tapes.

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