CN219610185U

CN219610185U - Casting dry-type transformer winding panel structure

Info

Publication number: CN219610185U
Application number: CN202321091335.XU
Authority: CN
Inventors: 任富强; 俞天波; 施佳; 王刚; 周灵道
Original assignee: Hangzhou Qiantang River Electric Group Co Ltd
Current assignee: Hangzhou Qiantang River Electric Group Co Ltd
Priority date: 2023-05-06
Filing date: 2023-05-06
Publication date: 2023-08-29
Anticipated expiration: 2033-05-06

Abstract

The utility model discloses a casting dry-type transformer winding panel structure which comprises a winding body, a heat dissipation through groove, a heat dissipation fin, a wiring panel, a separation groove, an A terminal, an X terminal, a winding tapping terminal and a round arc surface. According to the utility model, the creepage distance between the wiring terminals is increased, the lead-out distance of the internal wires of the winding is reduced, the resin consumption of the winding is reduced, and the heat dissipation area of the winding is increased under the condition that the size of the winding is unchanged.

Description

Casting dry-type transformer winding panel structure

[ field of technology ]

The utility model relates to the technical field of transformers, in particular to the technical field of a casting dry type transformer winding panel structure.

[ background Art ]

Current transformers can be divided into: oil immersed transformer, dry transformer, gas transformer. The dry-type transformer has the advantages of oil free, fireproof, long service life, energy conservation, low noise, simple maintenance, safety, reliability and the like. At present, the dry type transformer has been accepted by the vast users by the advantages of energy conservation, environmental protection, flame retardance, fire prevention, explosion prevention and the like, and the characteristics of being directly placed in a load center, and the application range of the dry type transformer is correspondingly and more wide, including being applied to important places such as hotels, restaurants, airports, high-rise buildings, commercial centers, residential communities and the like. The coil windings of dry transformers in the current market are mostly cast by epoxy resin. With the rapid development of dry-type transformers in the production of viable applications, transformers of special construction are sometimes encountered. Under the condition that the specific use requirement is met, the structure of a winding panel of a dry-type transformer in the prior art cannot be met, a plurality of manufacturers select the structure improvement of the winding panel of the dry-type transformer, for example, the utility model patent with publication number of CN218525423U discloses a high-voltage winding and a dry-type transformer, a wire is wound on a winding body to form a high-voltage coil, the high-voltage coil is a cake-type coil, the winding body is made of a fiber reinforced composite material, a high-voltage insulating layer wraps the high-voltage coil and the winding body, and the high-voltage insulating layer is high-temperature vulcanized silicone rubber. The high-voltage winding has the advantages of good fireproof performance, low-temperature resistance, ageing resistance and short-circuit resistance, excellent electrical insulation performance, energy conservation and environmental protection, however, the creepage distance between the wiring terminals cannot be increased, and the lead-out distance of the internal wires of the winding is long.

[ utility model ]

The utility model aims to solve the problems in the prior art, and provides a casting type dry type transformer winding panel structure which can increase the creepage distance between wiring terminals, reduce the lead-out distance of wires in a winding, reduce the resin consumption of the winding and increase the heat dissipation area of the winding under the condition of ensuring the unchanged winding size of the casting type transformer winding panel.

In order to achieve the above purpose, the utility model provides a cast dry-type transformer winding panel structure, which comprises a winding body, a heat dissipation through groove, heat dissipation fins, a wiring panel, a separation groove, an A terminal, an X terminal, winding tapping terminals and inverted arc surfaces, wherein the cross section of the winding body is hollow and elliptical, a plurality of heat dissipation through grooves which are uniformly distributed are axially penetrated and arranged in the side wall of the winding body, a plurality of heat dissipation fins are uniformly attached to the inner side wall of the winding body, one side of the outer side wall of the winding body is provided with the wiring panel, the upper part of the wiring panel is provided with the separation groove, the A terminal and the X terminal are arranged in the separation groove, the lower part of the wiring panel is provided with a plurality of winding tapping terminals, and the side edges of the winding body and the wiring panel are provided with inverted arc surfaces.

Preferably, the heat dissipation through grooves are uniformly distributed inside the side wall of the winding body in a surrounding mode, and hollow heat conduction aluminum strips are arranged in the heat dissipation through grooves in an inserted mode.

Preferably, the radiating fin is a semiconductor refrigerating fin, and the radiating fin is detachably arranged on the inner side wall of the winding body.

Preferably, the winding body and the wiring panel are of an integrated structure, and the height of the wiring panel is flush with the height of the winding body.

Preferably, the winding body is an epoxy resin casting winding.

Preferably, the separation groove is a rectangular groove, and the a terminal and the X terminal are respectively located at the upper end and the lower end of the separation groove.

Preferably, the cross section of the wiring panel is in the shape of an isosceles trapezoid with gradually shrinking top.

The utility model has the beneficial effects that: according to the utility model, through combining the winding body, the heat dissipation through groove, the radiating fins, the wiring panel, the separation groove, the A terminal, the X terminal, the winding tapping terminal and the inverted arc surface, through experimental optimization, the hollow elliptic winding body, the wiring panel and the separation groove are mutually matched, the winding tapping terminal is placed at the lowest part, the A, X terminal is placed above, meanwhile, the groove is arranged in the middle of the A, X terminal, the fillet is led to the joint of the panel and the winding, under the condition that the winding size is unchanged, the creepage distance between the wiring terminals is increased, the lead-out distance of wires inside the winding is reduced, the winding body, the heat dissipation through groove and the radiating fins are mutually matched, the resin consumption of the winding is reduced, the heat dissipation area of the winding is increased, and the temperature rise of the winding is reduced.

The features and advantages of the present utility model will be described in detail by way of example with reference to the accompanying drawings.

[ description of the drawings ]

Fig. 1 is a schematic diagram of a cast dry-type transformer winding panel structure according to the present utility model.

In the figure: 1-winding body, 2-heat dissipation through groove, 3-fin, 4-wiring panel, 5-separation groove, 6-A terminal, 7-X terminal, 8-winding tapping terminal, 9-arc surface.

[ detailed description ] of the utility model

Referring to fig. 1, the utility model relates to a cast dry type transformer winding panel structure, which comprises a winding body 1, a heat dissipation through groove 2, a heat dissipation sheet 3, a wiring panel 4, a separation groove 5, an A terminal 6, an X terminal 7, a winding tapping terminal 8 and an inverted arc surface 9, wherein the cross section of the winding body 1 is hollow and elliptical, a plurality of uniformly distributed heat dissipation through grooves 2 are axially and penetratingly arranged in the side wall of the winding body 1, a plurality of heat dissipation sheets 3 are uniformly attached to the inner side wall of the winding body 1, a wiring panel 4 is arranged on one side of the outer side wall of the winding body 1, the upper part of the wiring panel 4 is provided with the separation groove 5, an A terminal 6 and an X terminal 7 are arranged in the separation groove 5, a plurality of winding tapping terminals 8 are arranged on the lower part of the wiring panel 4, inverted arc surfaces 9 are arranged on the side edges of the winding body 1 and the wiring panel 4, the heat dissipation through grooves 2 are uniformly distributed around the inner side wall of the winding body 1, hollow aluminum strips are alternately arranged in the heat dissipation through grooves 2, the heat dissipation sheet 3 is a semiconductor body, the heat dissipation sheet 3 is a rectangular winding body is detached, the upper side wall of the winding body is provided with the isosceles trapezoid-shaped winding body is provided with the two ends of the winding body 1, the winding body is provided with the heat dissipation grooves are respectively, the two side faces are respectively, the winding grooves are respectively provided with the side faces of the winding grooves are respectively, and the winding grooves are provided with the winding structures are in the winding structures, and the winding structures are 1, and the two side structures are 1, and the two and the winding structures are 1.

According to the utility model, through combining the winding body 1, the heat dissipation through groove 2, the heat dissipation fin 3, the wiring panel 4, the separation groove 5, the A terminal 6, the X terminal 7, the winding tapping terminal 8 and the inverted arc surface 9 together, through experimental optimization, the hollow elliptic winding body 1, the wiring panel 4 and the separation groove 5 are mutually matched, the winding tapping terminal 8 is arranged at the lowest part, the A, X terminal 7 is arranged above, meanwhile, the groove is arranged in the middle of the A, X terminal 7, the round angle is led at the joint of the panel and the winding, under the condition that the winding size is unchanged, the creepage distance between the wiring terminals is increased, the lead-out distance of the internal wires of the winding is reduced, the winding body 1, the heat dissipation through groove 2 and the heat dissipation fin 3 are mutually matched, the resin consumption of the winding is reduced, the heat dissipation area of the winding is increased, and the temperature rise of the winding is reduced.

The above embodiments are illustrative of the present utility model, and not limiting, and any simple modifications of the present utility model fall within the scope of the present utility model.

Claims

1. A casting dry-type transformer winding panel structure is characterized in that: including winding body (1), heat dissipation logical groove (2), fin (3), wiring panel (4), separation recess (5), A terminal (6), X terminal (7), winding tapping terminal (8) and inverted arc surface (9), the cross section shape of winding body (1) is hollow oval, the axial runs through in the lateral wall of winding body (1) and is provided with a plurality of evenly distributed's heat dissipation logical groove (2), evenly laminating is provided with a plurality of fin (3) on the inside wall of winding body (1), lateral wall one side of winding body (1) is provided with wiring panel (4), the upper portion of wiring panel (4) is provided with separation recess (5), be provided with A terminal (6) and X terminal (7) in separation recess (5), the lower part of wiring panel (4) is provided with a plurality of winding tapping terminal (8), the side edge of winding body (1) and wiring panel (4) is provided with inverted arc surface (9).

2. A cast dry-type transformer winding panel structure as claimed in claim 1, wherein: the heat dissipation through grooves (2) are uniformly distributed inside the side wall of the winding body (1) in a surrounding mode, and hollow heat conduction aluminum strips are inserted into the heat dissipation through grooves (2).

3. A cast dry-type transformer winding panel structure as claimed in claim 1, wherein: the radiating fins (3) are semiconductor refrigerating fins, and the radiating fins (3) are detachably arranged on the inner side wall of the winding body (1).

4. A cast dry-type transformer winding panel structure as claimed in claim 1, wherein: the winding body (1) and the wiring panel (4) are of an integrated structure, and the height of the wiring panel (4) is flush with the height of the winding body (1).

5. A cast dry-type transformer winding panel structure as claimed in claim 1, wherein: the winding body (1) is an epoxy resin casting winding.

6. A cast dry-type transformer winding panel structure as claimed in claim 1, wherein: the separation groove (5) is a rectangular groove, and the A terminal (6) and the X terminal (7) are respectively positioned at the upper end and the lower end of the separation groove (5).

7. A cast dry-type transformer winding panel structure as claimed in claim 1, wherein: the cross section of the wiring panel (4) is in the shape of an isosceles trapezoid with gradually contracted top.