Insulated transposed conductor for ultrahigh-voltage transformer

Abstract

The utility model discloses an insulating transposed conductor for an ultrahigh-voltage transformer, which comprises a copper flat wire, the four surfaces of the copper flat wire are coated with insulating paint layers, the copper flat wire and the insulating paint layers are combined to form enameled wires, the number of the enameled wires in each row is not less than three, and the enameled wires in the upper layer and the lower layer are arranged in a staggered manner. The upper surfaces and the lower surfaces of the two rows of enamelled wires are transposed along the narrow surfaces in the same turning direction, the plurality of enamelled wires are coated with an electrical insulation paper tape, the enamelled wires on the upper layer and the lower layer are arranged in a staggered manner, and the center line positions of the enamelled wires are exposed, so that the overlapping area of the enamelled wires can be reduced, and the heat dissipation of the insulated transposed conductor can be further realized; and the space between the two varnished wires on the same layer is hollow, so that the distance between the two varnished wires on the same layer is increased, and the heat dissipation effect is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of transposed conductors, in particular to an insulated transposed conductor for an ultra-high voltage transformer. Background Art

[0002] Transposed conductor refers to a certain number of enameled copper flat wires combined into two rows with the wide sides touching each other, and the same direction of transposition is made on the upper and lower sides of the two rows of enameled wires along the narrow side as required, and it is composed of multiple layers of continuous and tight winding with electrical insulating paper tape. It has the advantages of greatly reducing load loss, reducing the temperature rise of winding hot spots, and improving the mechanical strength of windings. It has been widely used in the design and manufacture of large power transformer windings.

[0003] However, each row of conventional transposed conductors contains multiple enameled wires, and the upper and lower enameled wires are completely overlapped. Although the hot spots of the transposed conductors heat up more slowly than those of ordinary conductors, this structure will also affect the heat dissipation effect of the transposed conductors. Utility Model Content

[0004] The utility model aims to provide an insulation transposed conductor for an ultra-high voltage transformer to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: an insulated transposed conductor for an ultra-high voltage transformer, comprising a copper flat wire, wherein the four surfaces of the copper flat wire are coated with an insulating paint layer, the copper flat wire and the insulating paint layer are combined to form an enameled wire, the enameled wire has two rows, each row has no less than three enameled wires, the upper and lower layers of the enameled wires are arranged alternately, the upper and lower sides of the two rows of enameled wires are transposed in the same direction along a narrow surface, and the outer sides of several enameled wires are coated with electrical insulating paper tape.

[0006] As a further preferred embodiment of the present technical solution, the contact position between the upper and lower layers of enameled wires is coated with self-adhesive paint.

[0007] As a further preferred embodiment of the present technical solution, a supporting insulating paper tape is installed between the side edges of the two spaced-apart layers of enameled wires, and the supporting insulating paper tape is formed by folding an insulating paper tape.

[0008] As a further preferred embodiment of the present technical solution, the overlapping area of ​​each of the enameled wires in the upper and lower layers is 1 / 7 of the width of the enameled wire.

[0009] As a further preferred embodiment of the present technical solution, there is a hollow space between two enameled wires in the same layer.

[0010] The utility model provides an insulated transposed conductor for an ultra-high voltage transformer, which has the following beneficial effects:

[0011] (1) The utility model can reduce the overlap area of ​​the enameled wires by staggering the upper and lower layers of enameled wires and exposing the center line of the enameled wires to the outside, thereby further dissipating the heat of the insulation-transposed wires.

[0012] (2) The utility model increases the distance between the two enameled wires in the same layer by providing a hollow space between the two enameled wires in the same layer, thereby improving the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] In the figure: 1. Copper flat wire; 2. Insulating paint layer; 3. Electrical insulating paper tape; 4. Self-adhesive paint; 5. Support insulating paper tape. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0016] The utility model provides a technical solution: Figure 1 As shown, in this embodiment, an insulated transposed conductor for an ultra-high voltage transformer includes a copper flat wire 1, and the four surfaces of the copper flat wire 1 are coated with an insulating paint layer 2. The copper flat wire 1 and the insulating paint layer 2 are combined to form an enameled wire, which is characterized in that: there are two rows of enameled wires, each row has no less than three enameled wires, the upper and lower layers of enameled wires are staggered, the upper and lower sides of the two rows of enameled wires are transposed in the same direction along the narrow surface, and the outer sides of several enameled wires are coated with electrical insulating paper tapes 3.

[0017] like Figure 1 As shown, the position where the upper and lower layers of enameled wires contact each other is coated with self-adhesive paint 4.

[0018] The contact position of the upper and lower layers of enameled wires is fixed by the self-adhesive paint 4, so as to prevent the upper and lower layers and the enameled wires of the same layer from being misaligned.

[0019] like Figure 1 As shown, a supporting insulating paper tape 5 is installed between the sides of two spaced-apart layers of enameled wires, and the supporting insulating paper tape 5 is formed by folding an insulating paper tape.

[0020] Before covering the outer sides of several enameled wires with the electrical insulating paper tape 3, the supporting insulating paper tape 5 is installed between the sides of two layers of enameled wires spaced apart, so as to support the sides of the two layers of enameled wires spaced apart and prevent the sides of the enameled wires from collapsing.

[0021] like Figure 1 As shown, the overlapping area of ​​each of the enameled wires in the upper and lower layers is 1 / 7 of the width of the enameled wire.

[0022] The heat dissipation effect of the copper flat wire 1 can be further improved.

[0023] like Figure 1 As shown, there is a hollow space between two enameled wires in the same layer.

[0024] Increasing the distance between two enameled wires in the same layer can effectively dissipate heat.

[0025] The utility model provides an insulated transposed conductor for an ultra-high voltage transformer. By staggering the upper and lower layers of enameled wires, the center lines of the enameled wires are exposed to the outside, thereby reducing the overlap area of ​​the enameled wires, further dissipating the heat of the insulated transposed conductor, and by arranging the space between two enameled wires in the same layer to be hollow, the distance between the two enameled wires in the same layer is increased, thereby improving the heat dissipation effect.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An insulated transposed conductor for an ultra-high voltage transformer, comprising a copper flat wire (1), wherein the four surfaces of the copper flat wire (1) are coated with an insulating varnish layer (2), and the copper flat wire (1) and the insulating varnish layer (2) are combined to form an enameled wire, characterized in that: There are two rows of enameled wires, each row has no less than three enameled wires, the upper and lower layers of enameled wires are arranged in a staggered manner, the upper and lower sides of the two rows of enameled wires are transposed in the same direction along the narrow surface, and the outer sides of several enameled wires are covered with electrical insulating paper tapes (3).

2. The insulated transposed conductor for an ultra-high voltage transformer according to claim 1, characterized in that: The contact position of the upper and lower enameled wires is coated with self-adhesive paint (4).

3. The insulated transposed conductor for an ultra-high voltage transformer according to claim 2, characterized in that: A supporting insulating paper tape (5) is installed between the side edges of two layers of enameled wires that are spaced apart from each other. The supporting insulating paper tape (5) is formed by folding an insulating paper tape.

4. The insulated transposed conductor for an ultra-high voltage transformer according to claim 3, characterized in that: The overlapping area of ​​each of the enameled wires in the upper and lower layers is 1 / 7 of the width of the enameled wire.

5. The insulation-transposed conductor for an ultra-high voltage transformer according to claim 4, characterized in that: There is a hollow space between two enameled wires in the same layer.

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