CN219553394U

CN219553394U - Coil structure of dry-type transformer

Info

Publication number: CN219553394U
Application number: CN202320201552.3U
Authority: CN
Inventors: 刘勇
Original assignee: Tianjin Tianbian Henbol Electrical Advance Co ltd
Current assignee: Tianjin Tianbian Henbol Electrical Advance Co ltd
Priority date: 2023-02-13
Filing date: 2023-02-13
Publication date: 2023-08-18
Anticipated expiration: 2033-02-13

Abstract

The utility model discloses a dry-type transformer coil structure, which comprises: the support cylinder is sleeved on the die, a coil layer and end insulating layers arranged at two ends of the coil layer are wound on the outer surface of the support cylinder, the thickness of the end insulating layers is the same as that of the coil layer, intermediate insulating layers used for spacing two adjacent layers of the coil layer and the end insulating layers are wound on the outer surface of the end insulating layers, and an outer insulating layer is arranged on the outer surface of the outermost coil layer. Therefore, an intermediate insulating layer is added between two adjacent coil layers to increase the insulating capability of the interlayer winding, effectively prevent the abnormal operation of the transformer caused by the insulating problem of the interlayer winding, and end insulating layers are added at the two ends of each coil layer, so that the insulating performance of the end part of the transformer is enhanced, and the internal insulating fault of the transformer is reduced.

Description

Coil structure of dry-type transformer

Technical Field

The utility model relates to the technical field of transformers, in particular to a coil structure of a dry-type transformer.

Background

In recent years, the application range of dry transformers is expanding, and 10 kV-level distribution transformers used in places such as many foreign enterprises, large enterprises, city squares, stations, airports, high buildings and the like are gradually changed from oil-immersed products to 10 kV-level dry transformers. Compared with an oil immersed transformer, the dry transformer can go deep into a load center, can prevent fire and explosion, has excellent environmental protection performance, and has the advantages of no oil leakage, convenient installation, no maintenance and the like.

Currently, CN218004573U discloses a transformer with anti-interference function, including anti-interference shell, support and iron core main part, the internally mounted of anti-interference shell has the support, the internally mounted of support has the iron core main part, the outside winding of iron core main part has the coil.

However, when the transformer is operated, the coil may be degraded in the insulating material capability of the coil surface due to the effect of complex factors such as thermal stress and electromagnetic force, so that the effective insulation of the interlayer winding is degraded, and thus the transformer may be abnormally operated.

Disclosure of Invention

The utility model provides a coil structure of a dry-type transformer, wherein an intermediate insulating layer is added between two adjacent coil layers to increase the insulating capability of an interlayer winding, effectively prevent the abnormal operation of the transformer caused by the insulating problem of the interlayer winding, and end insulating layers are added at two ends of each coil layer, so that the insulating performance of the end of the transformer is enhanced, and the internal insulating fault of the transformer is reduced.

The utility model solves the technical problems by adopting the following technical scheme:

the embodiment of the utility model provides a coil structure of a dry-type transformer, which comprises the following components: the support cylinder is sleeved on the die, a coil layer and end insulating layers arranged at two ends of the coil layer are wound on the outer surface of the support cylinder, the thickness of the end insulating layers is the same as that of the coil layer, intermediate insulating layers used for spacing two adjacent layers of the coil layer and the end insulating layers are wound on the outer surface of the end insulating layers, and an outer insulating layer is arranged on the outer surface of the outermost coil layer.

Further, the sum of the length dimension of the coil layer and the length dimension of the end insulating layers at both ends is equal to the length of the intermediate insulating layer.

Further, the length of the intermediate insulating layer is the same as the length of the support cylinder.

Further, the end insulating layers are fixed at two ends of the coil layer through glass fiber cloth belts.

Further, the joint of the die and the supporting cylinder is attached by using an adhesive tape.

Further, the support cylinder is made of polyester PET material and DMD composite material.

Further, the end insulating layer, the middle insulating layer and the outer insulating layer are made of DMD insulating paper.

The utility model has the advantages and positive effects that:

according to the utility model, the end insulation layers are arranged at the two ends of the coil layer, so that the insulation performance of the end of the coil layer is enhanced, the insulation performance of the coil layer is ensured, and the insulation fault in the transformer is reduced; in addition, an intermediate insulating layer is arranged between the coil layers, so that an effective insulating effect of the interlayer winding is achieved, and the condition that the transformer works abnormally due to the insulating problem of the interlayer winding is prevented; in addition, the middle insulating layer and the end insulating layers are overlapped, and can form a whole after heating and curing, so that the mechanical strength of the coil is improved.

Drawings

Fig. 1 is a schematic structural diagram of a coil structure of a dry-type transformer according to the present utility model;

reference numerals:

1. a mold; 2. a support cylinder; 3. a coil layer; 4. an intermediate insulating layer; 5. an outer insulating layer; 6. an end insulating layer.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Embodiments of the utility model are described in further detail below with reference to the attached drawing figures:

the coil structure of the dry-type transformer according to the present utility model, as shown in fig. 1, comprises: the support cylinder 2 of cover on mould 1 support cylinder 2's surface winding have coil layer 3 with establish the end insulating layer 6 at coil layer 3 both ends, the thickness of end insulating layer 6 with the thickness of coil layer 3 is the same, the length dimension of coil layer 3 with the sum of the length dimension of end insulating layer 6 at both ends equals the length of intermediate insulating layer 4, end insulating layer 6 passes through glass fiber strap to be fixed at coil layer 3's both ends, coil layer 3's surface with the surface winding of end insulating layer 6 has the intermediate insulating layer 4 that is used for spacing adjacent two-layer coil layer 3 with end insulating layer 6, the length of intermediate insulating layer 4 with support cylinder 2's length is the same, is equipped with outer insulating layer 5 at outermost coil layer 3's surface.

Further, the end insulating layers 6 are fixed to both ends of the coil layer 3 through glass cloth tapes. Therefore, through insulating treatment on the two ends of the coil layer 3, the insulating property of the end part of the coil layer 3 is enhanced, the internal insulating fault of the transformer is reduced, and the service life is prolonged.

Further, the joint of the die 1 and the supporting cylinder 2 is attached by using an adhesive tape, so that the supporting cylinder 2 is fixed on the die 1, the die 1 and the supporting cylinder 2 are prevented from being separated, the coil layer 3 is wound on the subsequent supporting cylinder 2, and the supporting cylinder 2 cannot deviate.

Further, the supporting cylinder 2 is made of a polyester PET material and a DMD composite material, in particular, since the polyester PET material has a certain hardness, the supporting cylinder 2 made of the polyester PET material can play a role in supporting the coil layer 3; the DMD composite material is an insulating paper with resin, and the resin and the coil layer 3 are fused together to form a whole after being heated at high temperature.

Further, the end insulating layer 6, the middle insulating layer 4 and the outer insulating layer 5 are made of DMD insulating paper, wherein the DMD insulating paper is made of insulating paper with resin, and thus the resins are fused with each other after being heated at high temperature, so that the end insulating layer 6, the middle insulating layer 4, the outer insulating layer 5 and the coil layer 3 are conveniently connected, and meanwhile, the mechanical strength of the whole coil is improved.

The working principle and working process of the utility model are as follows:

the supporting cylinder 2 is sleeved on the die 1, the joint of the supporting cylinder 2 and the die 1 is adhered by adhesive tape, the winding of the coil is carried out on the outer surface of the supporting cylinder 2, the coil is wound in a cylinder shape, after one layer of wire is wound, the coil layer 3 is formed, insulation treatment is carried out on two ends of the coil layer 3, namely, the two ends of the coil layer 3 are required to be provided with the end insulation layers 6, the thickness of the end insulation layers 6 is the same as that of the coil layer 3, the outer surfaces of the coil layer 3 and the end insulation layers 6 are also wound with the middle insulation layer 4, the coil layer 3 and the end insulation layers 6 are wound on the outer surface of the middle insulation layer 4, namely, the middle insulation layer 4 is used for separating the adjacent two coil layers 3 until all the winding of the coil turns are finished, the outer insulation layer 5 is wound on the surface of the coil layer 3 on the outermost layer, finally, the coil with the die 1 is put into a curing furnace together for 130 DEG heating curing, and then the die 1 is removed after heating curing.

Thus, in the utility model, the end insulation layers 6 are arranged at the two ends of the coil layer 3 to strengthen the insulation performance of the end of the coil layer 3, ensure the insulation performance of the coil layer 3 and reduce the insulation fault in the transformer; in addition, the intermediate insulating layers 4 are arranged between the coil layers 3, so that the effective insulating effect of the interlayer winding is achieved, and the abnormal operation of the transformer caused by the insulating problem of the interlayer winding is prevented; in addition, the middle insulating layer 4 and the end insulating layers 6 are overlapped, and can form a whole after heating and curing, so that the mechanical strength of the coil is improved.

It should be emphasized that the examples described herein are illustrative rather than limiting, and therefore the utility model is not limited to the examples described in the detailed description, but rather falls within the scope of the utility model as defined by other embodiments derived from the technical solutions of the utility model by those skilled in the art.

Claims

1. A dry-type transformer coil structure, comprising:

the support cylinder (2) of cover on mould (1) support cylinder (2)'s surface winding has coil layer (3) and establishes end insulating layer (6) at coil layer (3) both ends, the thickness of end insulating layer (6) with the thickness of coil layer (3) is the same, the surface of coil layer (3) with the surface winding of end insulating layer (6) has the intermediate insulating layer (4) that are used for spacing adjacent two-layer coil layer (3) with end insulating layer (6), at outermost the surface of coil layer (3) is equipped with outer insulating layer (5).

2. A dry-type transformer coil structure as claimed in claim 1, characterized in that the sum of the length dimension of the coil layer (3) and the length dimension of the end insulation layers (6) at both ends is equal to the length of the intermediate insulation layer (4).

3. A dry-type transformer coil structure according to claim 2, characterized in that the length of the intermediate insulating layer (4) is the same as the length of the support cylinder (2).

4. A dry-type transformer coil structure as claimed in claim 1, characterized in that the end insulating layers (6) are fixed at both ends of the coil layer (3) by means of glass cloth tapes.

5. A dry-type transformer coil structure according to claim 1, characterized in that the junction of the mould (1) and the support cylinder (2) is glued by means of adhesive tape.

6. A dry-type transformer coil structure according to claim 1, characterized in that the support cylinder (2) is made of polyester PET material, DMD composite material.

7. A dry-type transformer coil structure according to claim 1, characterized in that the materials of the end insulating layer (6), the intermediate insulating layer (4) and the outer insulating layer (5) are all DMD insulating paper.