Power transformer winding wire outlet structure

Abstract

The utility model discloses a power transformer winding outgoing line structure which comprises a copper foil body, a cutting line extending in the length direction of the copper foil body is arranged at the tail end of the copper foil body, the copper foil body is cut along the cutting line to obtain a plurality of separated foils, and the foils are kept to be connected with the copper foil body. The foils are bent and then overlapped together to form a wire outlet structure; insulation paper is wound on the outer surface of the joint of the wire outlet structure and the copper foil body, and a first bonding strip is wound on the outer surface of the insulation paper. The insulation paper is wound on the outer surface of the joint of the wire outlet structure and the copper foil body, and the insulation paper can avoid short circuit between the wire outlet structure and the iron core. By arranging the first bonding strip and the second bonding strip, the insulation paper and the foil are bonded together, the position of the insulation paper can be well fixed, and the insulation paper is prevented from sliding on the wire outlet structure.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a winding outgoing line structure of a power transformer. Background Art

[0002] In the prior art, the winding output structure of a power transformer consists of a solid rectangular copper plate or several rectangular copper sheets of uniform cross-section. This plate is welded to the end of the copper foil along its width, with one end of the copper bar extending to serve as the output connection. Because the existing power transformer winding output structure consists of a single rectangular copper plate or several rectangular copper sheets, it is relatively wide and thick, consumes a large amount of material, and requires welding to secure it to the copper foil, making the winding output structure inconvenient to manufacture. Furthermore, during the welding process, burrs are easily formed at the weld due to improper temperature control, inappropriate welding material selection, or improper welding operation. These burrs can affect the insulation performance of the transformer winding. 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 to provide a power transformer winding output structure.

[0004] A power transformer winding output structure includes a copper foil body, wherein a cutting line extending along the length direction of the copper foil body is provided at the end of the copper foil body, and the copper foil body is cut along the cutting line to obtain a plurality of separated foil pieces, and the foil pieces remain connected to the copper foil body. The foil pieces are bent and overlapped to form an output structure; the outer surface of the connection between the output 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.

[0005] 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.

[0006] A further solution is that the number of the second adhesive strips is four, and the second adhesive strips are arranged in groups of two and are respectively arranged on the upper and lower surfaces of the outlet structure.

[0007] A further solution is that two second adhesive strips located on the same side of the outlet structure are arranged parallel to each other on the foil.

[0008] A further solution is that two second adhesive strips located on the same side of the outlet structure are arranged crosswise on 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: the present invention forms an outlet structure by bending and overlapping the foil sheets; thereby eliminating the need to weld a rectangular strip copper plate to the end of the copper foil, making the winding outlet structure easy to process, and preventing burrs from forming and affecting the insulation performance of the transformer winding; insulating paper is wrapped around the outer surface of the connection between the outlet structure and the copper foil body, and the insulating paper can prevent a short circuit between the outlet structure and the iron core; by arranging a first adhesive strip and a second adhesive strip, the insulating paper and the foil sheets are bonded together, which can well fix the position of the insulating paper and prevent the insulating paper from sliding on the outlet structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] 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.

[0012] Figure 1 A schematic structural diagram of the copper foil body provided in an embodiment of the present utility model;

[0013] Figure 2 A schematic diagram of a power transformer winding outgoing line structure provided by an embodiment of the utility model Figure 1 ;

[0014] Figure 3 A schematic diagram of a power transformer winding outgoing line structure provided by an embodiment of the utility model Figure 2 .

[0015] Reference numerals: copper foil body 1 , cutting line 11 , lead structure 2 , foil 21 , insulating paper 22 , second adhesive strip 23 . DETAILED DESCRIPTION

[0016] 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.

[0017] 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.

[0018] 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.

[0019] See also Figure 1-Figure 3 The present invention provides a power transformer winding output structure, including a copper foil body 1, wherein the end of the copper foil body 1 is provided with a cutting line 11 extending along the length direction of the copper foil body 1. The copper foil body 1 is cut along the cutting line 11 to obtain a number of separated foils 21; it should be noted that at this time, the foils 21 remain connected to the copper foil body 1. The foils 21 are bent and overlapped to form an output structure 2; it can be understood that since the foils 21 remain connected to the copper foil body 1, the present application does not need to weld the foils 21 to the copper foil body 1, thereby eliminating the welding process, making the winding output structure 2 easy to process, and will not form burrs that affect the insulation performance of the transformer winding.

[0020] Furthermore, the outer surface of the connection between the outlet structure 2 and the copper foil body 1 is wrapped with insulating paper 22, and the outer surface of the insulating paper 22 is wrapped with a first adhesive strip, which is not shown in the figure and is a double-sided tape. The insulating paper 22 ensures the safety and insulation of the connection to avoid short circuit caused by contact between the outlet structure 2 and the iron core. The first adhesive strip can reinforce the connection between the insulating paper 22 and the outlet structure 2 to prevent the insulating paper 22 from spreading or loosening due to factors such as vibration and temperature changes. The outer surface of the insulating paper 22 is also provided with a second adhesive strip 23, which is also a double-sided tape. The middle part of the second adhesive strip 23 is bonded to the outer surface of the insulating paper 22, and the end of the second adhesive strip 23 is bonded to the foil 21. On the basis of setting the first adhesive strip, a second adhesive strip 23 is further provided. The second adhesive strip 23 bonds the insulating paper 22 to the foil 21, which can well fix the position of the insulating paper 22 and prevent the insulating paper 22 from sliding on the outlet structure 2.

[0021] Specifically, four second adhesive strips 23 are provided, arranged in pairs on the upper and lower surfaces of the outlet structure 2. Two second adhesive strips 23 on the same side of the outlet structure 2 can be arranged parallel to each other on the foil 21; or they can be arranged crosswise on the foil 21. 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.

[0022] The working process of the present invention is as follows: the staff first cuts the end of the copper foil body 1 along the cutting line 11, so that the end of the copper foil body 1 forms a number of separated foils 21, and then bends each foil 21 90° in turn, and hits the foil 21 with a hammer to make the surface of the foil 21 flat and tightly fit together; cuts off the uneven part of the foil 21 away from the copper foil body 1, so that the end of the wire-out structure 2 is flush; then wraps the insulating paper 22 around the outer surface of the wire-out structure 2 for multiple turns, and uses double-sided tape to wrap around the outer surface of the insulating paper 22 for multiple turns to prevent the insulating paper 22 from spreading and sliding; finally, uses double-sided tape to bond the insulating paper 22 and the surface of the foil 21 together, which can well fix the position of the insulating paper 22 and prevent the insulating paper 22 from sliding on the wire-out structure 2.

[0023] 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.

[0024] 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.

[0025] 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 power transformer winding outlet structure, characterized by: The invention comprises a copper foil body (1), wherein a cutting line (11) extending along the length direction of the copper foil body (1) is provided at the end of the copper foil body (1), and the copper foil body (1) is cut along the cutting line (11) to obtain a plurality of mutually separated foil pieces (21), and the foil pieces (21) remain connected to the copper foil body (1), and the foil pieces (21) are bent and overlapped to form an outlet structure (2); the outer surface of the connection between the outlet structure (2) and the copper foil body (1) is wrapped with insulating paper (22), and the outer surface of the insulating paper (22) is wrapped with a first adhesive strip.

2. The power transformer winding outlet structure according to claim 1, characterized in that: A second adhesive strip (23) is also provided on the outer surface of the insulating paper (22), the middle portion of the second adhesive strip (23) is bonded to the outer surface of the insulating paper (22), and the end of the second adhesive strip (23) is bonded to the foil (21).

3. The power transformer winding outlet structure according to claim 2, characterized in that: The number of the second adhesive strips (23) is four, and the second adhesive strips (23) are arranged in groups of two and are respectively arranged on the upper and lower surfaces of the outlet structure (2).

4. The power transformer winding outlet structure according to claim 3, characterized in that: Two second adhesive strips (23) located on the same surface of the outlet structure (2) are arranged parallel to each other on the foil (21).

5. The power transformer winding outlet structure according to claim 4, characterized in that: Two second adhesive strips (23) located on the same surface of the outlet structure (2) are arranged on the foil (21) in a manner that they cross each other.

6. The power transformer winding outlet structure according to claim 2, characterized in that: The first adhesive strip and the second adhesive strip (23) are both double-sided adhesive tapes.

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