CN213519540U

CN213519540U - Wire outlet structure of dry type transformer

Info

Publication number: CN213519540U
Application number: CN202023043763.4U
Authority: CN
Inventors: 陈恒云; 王佐恒; 黄廷兵; 张远; 胡祥志
Original assignee: Chongqing Xianglong Electric Co ltd
Current assignee: Chongqing Xianglong Electric Co ltd
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-06-22
Anticipated expiration: 2030-12-16

Abstract

The utility model provides a dry-type transformer's outlet structure, including unshakable in one's determination and the coil of assembly on unshakable in one's determination, the coil links to each other with female arranging, a serial communication port, female arranging plants in the inboard of coil to be in the same place with the inboard welding of coil. The utility model discloses an inboard welding of female arranging and coil is in the same place, because the coil with female welding position who arranges makes this welding position reduce the external influence that receives in the inboard of coil, reduce the possibility of coil fracture, improve its life to need not to draw coil wire and link to each other with female arranging outward again, elegant appearance.

Description

Wire outlet structure of dry type transformer

Technical Field

The utility model relates to a power equipment technical field, concretely relates to outlet structure of dry-type transformer.

Background

Dry transformers are mainly of two types, dip and epoxy (including cast and wound). The epoxy resin dry transformer is a dry transformer mainly using epoxy resin as an insulating material, and can be divided into a casting type and a wrapping type. Most of the existing products are epoxy cast. Dry type transformers consume more effective materials than oil-immersed ones because of the inferior insulation and heat dissipation of air, and therefore, dry type transformers are used only in places with high fire protection requirements, such as subway, high-rise buildings, interior of workshops, or power stations.

At present, dry-type transformer manufacturers in China adopt copper foils or aluminum foils for winding under high current and low voltage, the difficulty in purchasing the copper foils or the aluminum foils is high for a single non-standard product, and a plurality of wires are usually considered for winding and pouring. However, in the traditional technology, a plurality of wires are led out, the appearance is not attractive, and in addition, the welding position of the wires and the busbar generates heat, the coil cracks and other quality hidden troubles are caused by external force.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art exists, the utility model provides a dry-type transformer's outlet structure, including unshakable in one's determination and the coil of assembly on unshakable in one's determination, the coil links to each other with female arranging, female arranging plants the inboard at the coil to be in the same place with the inboard welding of coil.

Therefore, the inner sides of the busbar and the coil are welded together, the welding position of the coil and the busbar is arranged on the inner side of the coil, so that the welding position is reduced from external influences, the possibility of cracking of the coil is reduced, the service life of the coil is prolonged, a coil wire does not need to be led out of the coil and then is connected with the busbar, and the coil is attractive and elegant.

Preferably, the lower end of the busbar extends to the lower part of the coil, the welding position of the busbar and the coil is positioned at the upper part of the inner side of the coil, and insulating paper is arranged between the busbar and the coil below the welding position.

Therefore, the method is safe and reliable, and the connection quality between the busbar and the coil is improved.

Preferably, the height of the coil is set within a range of 450mm to 500mm, and the distance between the lower end of the busbar and the upper end of the coil is set within a range of 350mm to 480 mm.

Therefore, the welding strength between the busbar and the coil is reliable.

Preferably, the busbar and the coil are welded through a copper-phosphorus welding rod or a copper-phosphorus welding rod.

Preferably, the busbar and the coil are fixed together through a contraction band.

Thus, the fixing effect is good.

Preferably, an epoxy resin layer is wound on the outer side of the coil.

Therefore, the mechanical strength of the transformer is improved, and the transformer has excellent moisture-proof and dust-proof performances.

Preferably, an annular gap is formed between the iron core and the coil, an insulating heat conducting tube layer is arranged in the annular gap, a gap between the insulating heat conducting tube layer and the iron core is filled with heat conducting silica gel, and a layer of silicon adhesive tape is wound outside the insulating heat conducting tube layer.

Thus, the insulating heat conducting pipe layer is beneficial to the transfer and reduction of the heat of the iron core, and can promote the air flow between the iron core and the coil, thereby achieving the outstanding effect of rapidly reducing the temperature of the iron core and the coil of the transformer.

Drawings

In order to more clearly illustrate the embodiments of the present invention, the drawings used in the embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

Fig. 1 is a schematic vertical structural view of a dry-type transformer of the present invention;

fig. 2 is a schematic diagram of a lateral structure of the dry-type transformer of the present invention.

Reference numerals:

1-iron core, 2-coil, 3-bus bar, 4-epoxy resin layer, 5-insulating heat conducting tube layer, 6-heat conducting silica gel, 7-silicon adhesive tape.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

Example (b): as shown in fig. 1, the wire outlet structure of the dry type transformer comprises an iron core 1 and a coil 2 assembled on the iron core 1, wherein the coil 2 is connected with a busbar 3, and the busbar 3 is inserted at the inner side of the coil 2 and welded with the inner side of the coil 2.

As shown in fig. 1, the lower end of the busbar 3 extends to the lower part of the coil 2, the welding position of the busbar 3 and the coil 2 is located at the upper part of the inner side of the coil 2, and insulating paper (not shown) is arranged between the busbar 3 and the coil 2 below the welding position. The height of the coil 2 is set within the range of 450 mm-500 mm, and the distance between the lower end of the busbar 3 and the upper end of the coil 2 is set within the range of 350 mm-480 mm. Therefore, the method is safe and reliable, and the connection quality between the busbar and the coil is improved. And the busbar 3 and the coil 2 are welded by a copper-phosphorus welding rod or a copper-phosphorus welding rod. The bus bar 3 and the coil 2 are fixed together by a shrink band (not shown). Thus, the fixing effect is good.

When the welding method is implemented, the welding length of the busbar 3 and the coil 2 is 40 mm.

As shown in fig. 1 and 2, the coil 2 has a multi-layer winding structure. In the implementation process, the coil is wound in four layers, each layer has 15 turns, and the coil conducting wires are stacked by 3 layers of SBEMLB-4.25X13.2// 2. When the coil is four layers, the busbar is arranged between the third layer and the fourth layer from inside to outside.

As shown in fig. 1, an epoxy resin layer 4 is wound around the outermost coil 2. Therefore, the mechanical strength of the transformer is improved, and the transformer has excellent moisture-proof and dust-proof performances.

As shown in fig. 2, an annular gap is formed between the iron core 1 and the innermost coil 2, an insulating heat conducting tube layer 5 is arranged in the annular gap, a gap between the insulating heat conducting tube layer 5 and the iron core 1 is filled with heat conducting silica gel 6, and a layer of silica gel 7 is wound outside the insulating heat conducting tube layer 5.

In practice, the silicon tape 7 can be a silicon tape of Beigsi-PadK 10 US, the insulating and heat-conducting tube layer 5 can be made of 99.5% alumina ceramic tubes arranged in a ring, and the heat-conducting silica gel 6 can be a heat-conducting silica gel of SE4420 US Kangning, import road.

When the coil is implemented, two ends of the welding position of the busbar are both rounded, and the outer diameter part of the busbar is protruded to be positioned at the panel part of the coil.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims

1. The coil is connected with a busbar, and the busbar is inserted into the inner side of the coil and welded with the inner side of the coil.

2. An outlet structure of a dry type transformer according to claim 1, wherein a lower end of the busbar extends to a lower portion of the coil, a welding position of the busbar and the coil is located at an upper portion of an inner side of the coil, and insulation paper is provided between the busbar and the coil below the welding position.

3. The outlet structure of a dry type transformer according to claim 1, wherein the height of the coil is set in a range of 450mm to 500mm, and a distance between a lower end of the busbar and an upper end of the coil is set in a range of 350mm to 480 mm.

4. An outlet structure of a dry type transformer according to claim 1, wherein the bus bar and the coil are welded by copper phosphorus welding rod or three and welding wire.

5. An outlet structure of a dry type transformer as claimed in claim 1, wherein the bus bar and the coil are fixed together by a shrink band.

6. The outgoing line structure of a dry type transformer as claimed in claim 1, wherein an epoxy resin layer is wound around an outer side of the coil.

7. An outlet structure of a dry-type transformer according to claim 6, wherein an annular gap is formed between the iron core and the coil, an insulating heat conducting tube layer is arranged in the annular gap, a gap between the insulating heat conducting tube layer and the iron core is filled with heat conducting silica gel, and a layer of silica gel fabric is wound outside the insulating heat conducting tube layer.