CN212303328U

CN212303328U - Voltage transformer coil wound by primary winding

Info

Publication number: CN212303328U
Application number: CN202020939094.XU
Authority: CN
Inventors: 王仁焘; 欧希堂; 赵日东; 高庆利; 贾学锋; 徐策; 李锋; 张文安; 周顺开; 李建龙; 郐小娟
Original assignee: Dalian North Instrument Transformer Group Co Ltd
Current assignee: Dalian North Instrument Transformer Group Co Ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-01-05
Anticipated expiration: 2030-05-29

Abstract

The utility model discloses a voltage transformer coil of primary winding coiling belongs to high-tension apparatus coil technical field. The enameled flat copper wire is wound on the periphery of an insulating framework layer by layer through a guide device; the enameled flat copper wire is wound on the insulating framework for one circle, each layer of enameled flat copper wire is composed of a plurality of circles, and interlayer insulating paper is arranged between every two adjacent layers of enameled flat copper wires; the guide device comprises a transverse bolt, a glass test tube, an L-shaped fixing frame, a bent iron plate, an upper layer felt, a lower layer felt and a longitudinal bolt. This application adopts the coiling of enameled flat copper wire, under the unchangeable condition of coil number of turns and wire footpath area, every layer number of turns reduces, and the number of piles increases, and the distance between the layer reduces, and the winding external diameter diminishes, has reduced field intensity between the primary coil layer, makes coil outside field intensity littleer to reach the little purpose of product partial discharge volume.

Description

Voltage transformer coil wound by primary winding

Technical Field

The utility model relates to a high-tension apparatus coil technical field, concretely relates to voltage transformer coil of primary winding coiling.

Background

At present, a voltage transformer coil of a primary winding in the transformer industry is generally wound by an enameled round copper wire, production experience of more than 50 years is existed in China, along with continuous development of advanced machine equipment, the coil winding manufacturing process is continuously and gradually improved, and compared with the mature enameled round copper wire winding, the coil winding method has technical incompleteness, namely, the number of turns of the primary winding is large, the outer diameter is large, the interlayer distance is large, the interlayer field intensity is high, and the coil winding method is mainly characterized in that the number of turns of each layer is large, the electric field intensity is too concentrated, the interlayer field intensity is greatly different, the design parameter capacity is not high. Therefore, a more perfect and advanced wound coil is urgently needed, and the design and manufacturing level of the transformer is further improved.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model aims to provide a voltage transformer coil of primary winding coiling to solve the every layer of number of turns of current voltage transformer primary winding many, electric field strength is too concentrated, the field intensity phase difference between the layer is big, the problem that design parameter capacity is little.

In order to achieve the purpose, the technical scheme of the application is as follows: the voltage transformer coil wound by the primary winding comprises enameled flat copper wires, and the enameled flat copper wires are wound on the periphery of an insulating framework in a layered manner through a guide device; the enameled flat copper wire is wound on the insulating framework for one circle, each layer of enameled flat copper wire is composed of a plurality of circles, and interlayer insulating paper is arranged between every two adjacent layers of enameled flat copper wires;

the guiding device comprises a transverse bolt, a glass test tube, an L-shaped fixing frame, a bent iron plate, an upper felt, a lower felt and a longitudinal bolt, wherein the transverse bolt sequentially penetrates through a central through hole of the glass test tube and a hole a in a vertical plate of the L-shaped fixing frame to be connected with a transverse nut, a hole b is formed in a horizontal plate of the L-shaped fixing frame, the longitudinal bolt penetrates through the hole b, the bent iron plate, the upper felt, the lower felt and the longitudinal nut to be connected, the upper felt is located below the top of the bent iron plate, the lower felt is located above the bottom of the bent iron plate, and an enameled flat copper wire penetrates through the space between the upper felt and the.

Furthermore, the bending iron plate comprises an upper top plate, a lower bottom plate and a bending plate, the upper portion of the bending plate is connected with the upper top plate, the lower portion of the bending plate is connected with the lower bottom plate, two baffles are arranged on two sides of the upper top plate and the lower bottom plate respectively, a through wire groove is formed between the two baffles, and the enameled flat copper wire penetrates through the through wire groove.

Furthermore, the shape and the size of the upper layer of felt are matched with those of the upper top plate, the shape and the size of the lower layer of felt are matched with those of the lower bottom plate, and the length and the width of the upper top plate are equal to those of the lower bottom plate.

Further, the longitudinal nut is positioned below the lower bottom plate.

Further, the interlayer insulating paper is fixed between two adjacent layers of enameled flat copper wires by using a double-sided adhesive tape.

Further, the transverse bolt is fixed on the winding machine.

The utility model discloses owing to adopt above technical scheme, can gain following technological effect: by adopting the enameled flat copper wire, under the condition that the number of turns of the coil and the area of the wire diameter are not changed, the number of turns of each layer is reduced, the number of layers is increased, the distance between layers is reduced, the outer diameter of the winding is reduced, the inter-layer field intensity of the primary coil is reduced, the external field intensity of the coil is smaller, and therefore the purpose of small local discharge amount of a product is achieved. The coil formed by winding the single enamelled flat copper wire reduces the turn-to-turn air gap of the primary winding, reduces the outer diameter of the primary winding, further reduces the overall design size of the transformer, increases the capacity of design parameters, leaves a large margin for the design of a matched switch cabinet, and can be installed in any direction. The enameled flat copper wire is prevented from being overturned in one direction all the time through the guide device, and the interlayer insulation paper is ensured to be tightly attached to the contacted layer.

Drawings

The utility model discloses total 3 enclosed drawings:

FIG. 1 is a cross-sectional view of a primary winding wound voltage transformer coil;

FIG. 2 is a schematic view of the structure of the guide device;

fig. 3 is a schematic structural view of an enameled flat copper wire before being wound.

The sequence numbers in the figures illustrate: 1. enamelled rectangular copper wire, 2, interlayer insulating paper, 3, first layer enamelled rectangular copper wire, 4, second layer enamelled rectangular copper wire, 5, horizontal bolt, 6, horizontal nut, 7, L type mount, 8, glass test tube, 9, vertical bolt, 10, upper felt, 11, bent iron plate, 12, baffle, 13, vertical nut.

Detailed Description

The invention will be described in further detail with reference to the following figures and specific embodiments: the present application is further described by taking this as an example.

Example 1

As shown in fig. 1 to 3, the present embodiment provides a voltage transformer coil wound by a primary winding, including an enameled flat copper wire, where the enameled flat copper wire is wound around the periphery of an insulating framework layer by layer through a guiding device, as shown in fig. 1, a first layer of enameled flat copper wire, a second layer of enameled flat copper wire, … …, and an nth layer of enameled flat copper wire; the enameled flat copper wire is wound on the insulating framework for one circle, each layer of enameled flat copper wire is composed of a plurality of circles, and interlayer insulating paper is arranged between every two adjacent layers of enameled flat copper wires; the interlayer insulating paper is made of a flexible composite insulating material and is fixed between two adjacent layers of enameled flat copper wires by using a double-sided adhesive tape, and the enameled flat copper wires are wound on a spool of a winding machine.

The bending iron plate comprises an upper top plate, a lower bottom plate and a bending plate, the upper portion of the bending plate is connected with the upper top plate, the lower portion of the bending plate is connected with the lower bottom plate, two baffles are arranged on two sides of the upper top plate and the two sides of the lower bottom plate respectively, a through wire groove is formed between the two baffles, and the enameled flat copper wire penetrates through the through wire groove. The shape and the size of the upper layer of felt are matched with those of the upper top plate, the shape and the size of the lower layer of felt are matched with those of the lower bottom plate, and the length and the width of the upper top plate are equal to those of the lower bottom plate. The longitudinal nut is positioned below the lower bottom plate. The axial bolt is used for controlling the tightness degree of the enameled flat copper wire, and the glass test tube plays a role in fixing; the two sides of the clamped bent iron plate are provided with baffles to prevent the felt from penetrating out. The transverse bolt is fixed on the winding machine.

The manufacturing method of the voltage transformer coil comprises the following steps of winding by adopting a micro-control or numerical control flat wire parallel winding machine:

1) a guide device is arranged on a winding machine, and an enameled flat copper wire is wound on the periphery of the insulating framework through the guide device;

2) winding a single enameled flat copper wire for one circle from the first layer, wherein each layer is wound for a certain number of turns, and adding interlayer insulating paper after the winding of the layer is finished;

3) returning to the next layer of turns, and adding interlayer insulating paper after the winding of the layer is finished;

4) and repeating the single winding of each layer until the final layer of winding is finished.

The electromagnetic induction principle is fully considered in the application, the winding effect of the enameled flat copper wire is utilized when the coil is wound, the distance between winding layers and the outer diameter of the winding are reduced, the field intensity between primary coil layers is further reduced, the field intensity outside the coil is reduced, the purpose that the local discharge amount of a product is small is achieved, the product can be safely operated, and the beneficial guarantee is provided for batch manufacturing and quality control of a mutual inductor.

The coil reduces turn-to-turn air gaps of the primary winding, the outer diameter of the primary winding is reduced, and then the overall design size of the transformer is reduced, so that the design parameter capacity is large, a large margin is reserved for the design of a matched switch cabinet, and the design level of a voltage transformer product is greatly improved.

The above, only for the utility model discloses create the concrete implementation way of preferred, nevertheless the utility model discloses the protection scope of creation is not limited to this, and any person skilled in this technical field is in the utility model discloses create the technical scope of disclosure, according to the utility model discloses the technical scheme of creation and utility model design equivalence replacement or change all should be covered in the protection scope of creation of the utility model.

Claims

1. The voltage transformer coil wound by the primary winding is characterized by comprising enameled flat copper wires, wherein the enameled flat copper wires are wound on the periphery of an insulating framework layer by layer through a guide device; the enameled flat copper wire is wound on the insulating framework for one circle, each layer of enameled flat copper wire is composed of a plurality of circles, and interlayer insulating paper is arranged between every two adjacent layers of enameled flat copper wires;

2. The primary winding wound voltage transformer coil as claimed in claim 1, wherein the bent iron plate comprises an upper top plate, a lower bottom plate and a bent plate, the upper portion of the bent plate is connected with the upper top plate, the lower portion of the bent plate is connected with the lower bottom plate, two baffles are respectively arranged on two sides of the upper top plate and the lower bottom plate, a through groove is formed between the two baffles, and the enameled flat copper wire passes through the through groove.

3. The primary winding wound voltage transformer coil of claim 2, wherein the shape and size of the upper layer felt is matched with the upper top plate, the shape and size of the lower layer felt is matched with the lower bottom plate, and the length and width of the upper top plate and the lower bottom plate are equal.

4. A primary-winding voltage transformer coil according to claim 2, wherein said longitudinal nut is located below the lower base plate.

5. The primary-winding voltage transformer coil of claim 1, wherein the interlayer insulating paper is fixed between two adjacent layers of enameled rectangular copper wires by double-sided tape.

6. A primary-winding-wound voltage transformer coil according to claim 1, wherein said transverse bolt is fixed to the winding machine.