CN219349974U

CN219349974U - High-end converter transformer shielding plate structure

Info

Publication number: CN219349974U
Application number: CN202320722988.7U
Authority: CN
Inventors: 范丽娟; 王海磊; 崔书伟; 孟宪乡; 王亚敏; 胡少伟; 徐凤; 常铮; 张利伟
Original assignee: Baoding Tianwei Baobian Electric Co Ltd
Current assignee: Baoding Tianwei Baobian Electric Co Ltd
Priority date: 2023-04-04
Filing date: 2023-04-04
Publication date: 2023-07-14
Anticipated expiration: 2033-04-04

Abstract

The utility model relates to a high-end converter transformer shielding plate structure, which is used for improving an internal electric field of a transformer and belongs to the technical field of transformers. The technical proposal is as follows: placing the core (11) into a paperboard core placing groove, uniformly punching a plurality of binding holes (10) at the peripheral edge positions after assembling the bottom (7), the core (11) and the cover (9) together, sequentially penetrating the binding holes (10) by ropes for binding, and integrally bending the assembled bottom, core and cover to form a U shape. The beneficial effects of the utility model are as follows: the shielding plate is arranged between the lower part of the upper iron yoke and the winding, so that an electric field can be effectively and uniformly generated, and the loss is reduced.

Description

High-end converter transformer shielding plate structure

Technical Field

The utility model relates to a high-end converter transformer shielding plate structure, which is used for improving an internal electric field of a transformer and belongs to the technical field of transformers.

Background

The shielding plate in the transformer is used for shielding the sharp angle of the iron core, the upper part of the lower iron yoke, the lower part of the lower iron yoke or the magnetic shielding outside of the oil tank, and can prevent the sharp angle from discharging. The size of the shielding plate is generally larger, and the length and the width of the shielding plate are about two meters to four meters according to different voltage levels of the transformer.

The voltage difference exists between the lower part of the upper iron yoke in the iron core of the converter transformer and the coil winding end, the transformer loss can be increased and the service life of an insulating part can be reduced after long-time operation, and due to the specificity of the position, a shielding plate with a special structure different from the traditional shielding plate needs to be placed, and the shielding plate can be used for homogenizing an electric field and reducing the loss.

Disclosure of Invention

The utility model aims to provide a high-end converter transformer shielding plate structure which is arranged between the lower part of an upper iron yoke and a winding, so that an electric field can be effectively and uniformly formed, loss is reduced, and the problems in the prior art are solved.

The technical scheme of the utility model is as follows:

a high-end converter transformer shielding plate structure consists of a bottom part, a core part and a cover part; the paper board core is rectangular paper board, double-sided gummed paper is paved on the front side and the back side of the paper board core, two layers of cable strips are wrapped at the peripheral edge positions of the paper board core, the semi-conductive paper is adhered outside the double-sided gummed paper, the paper board core and the cable strips are completely wrapped by the semi-conductive paper, the copper strips are paved on the semi-conductive paper after hot pressing, the copper strips are fixed by hot adhesive tapes, and the ends of the copper strips are led out and connected with the leads;

the bottom is rectangular paperboard, a paperboard strip is bonded at the edge of the bottom to serve as a frame, and a paperboard core placing groove is formed in the frame;

the cover is rectangular paperboard with the same size as the bottom;

the core is arranged in the paperboard core placing groove, a plurality of binding holes are uniformly formed in the edge positions of the assembled paperboard core placing groove, the assembled paperboard core placing groove is sequentially bound by ropes through the binding holes, and the assembled paperboard core placing groove is U-shaped after being integrally bent.

Further, the leads are led out from the frame of the bottom.

Further, a plurality of binding holes are uniformly formed in the edge positions of the bottom, the frame and the cover.

Further, the peripheral edge of the core is wrapped with an angle ring for protecting the core from damage.

The beneficial effects of the utility model are as follows: the shielding plate is arranged between the lower part of the upper iron yoke and the winding, so that an electric field can be effectively and uniformly generated, and the loss is reduced.

Drawings

FIG. 1 is a schematic view of a paperboard core according to an embodiment of the utility model;

FIG. 2 is a schematic diagram of a semi-conductive paper structure according to an embodiment of the present utility model

FIG. 3 is a schematic view of the mounting structure of a paperboard, a semi-conductive paper and a copper strip according to an embodiment of the utility model;

FIG. 4 is a schematic view of a core structure according to an embodiment of the present utility model;

FIG. 5 is a schematic view of the upper end section of the directional core of FIG. 4 A-A;

FIG. 6 is a schematic view of a cross-sectional view of the lower end of the core of FIG. 4 A-A;

FIG. 7 is a schematic view of the bottom structure of an embodiment of the present utility model (after placement of the core);

FIG. 8 is a schematic view of a cover structure according to an embodiment of the present utility model;

in the figure: cardboard core 1, semiconductive paper 2, copper strips 3, angle rings 4, cable strips 5, leads 6, bottom 7, frame 8, cover 9, lashing holes 10, core 11.

Detailed Description

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings.

Referring to fig. 1-8, the embodiment provides a high-end converter transformer shielding plate structure which is in an elongated strip shape and consists of a bottom 7, a core 11 and a cover 9; the core 11 contains cardboard core 1, gummed paper and semiconductive paper 2, copper strips 3, cable paper strip 5 and lead wire 6, and cardboard core 1 is 0.5mm thick's rectangle cardboard, all lays two-sided gummed paper on the positive and negative of cardboard core 1, and the border position is wrapped up in two-layer cable paper strip 5 around cardboard core 1 makes its slick and sly, guarantees shielding effect. The semi-conductive paper 2 is adhered outside the double-sided gummed paper, the semi-conductive paper 2 completely wraps the paperboard core 1 and the cable paper strip 5, a copper strip 3 is paved on the semi-conductive paper 2 after hot pressing, and the semi-conductive paper is fixed by a hot adhesive tape, and the end part of the copper strip 3 is led out and connected with a lead 6; the peripheral edge of the core is wrapped with a layer of corner rings.

The bottom 7 is a rectangular paperboard with the thickness of 1.0mm, a paperboard strip with the thickness of 1.0mm is adhered to the edge of the bottom 7 to serve as a frame 8, and a paperboard core placing groove is formed in the frame 8.

The cover 9 is a rectangular paperboard 1.0mm thick of the same size as the base.

The lead 6 is led out from the frame 8 of the bottom 7.

The shielding plate is arranged between the lower part of the upper iron yoke and the winding, so that the electric field in the converter transformer can be improved, and the electrical stability can be improved.

The processing method of the high-end converter transformer shielding plate structure in the implementation comprises the following steps:

(1) paving double-sided gummed paper on the front and back sides of a paperboard core 1 with the thickness of 0.5mm, wrapping two layers of cable paper strips 5 on the peripheral edge positions of the paperboard core 1, pasting semiconductive paper 2 outside the double-sided gummed paper, fully wrapping the paperboard core 1 and the cable paper strips 5 by the semiconductive paper 2, paving a copper strip 3 on the semiconductive paper 2 after hot pressing, fixing the copper strip 3 by using a hot adhesive tape, leading out the end part of the copper strip 3 and connecting with a lead 6, finishing core manufacture, wrapping a layer of corner rings on the peripheral edge positions of the manufactured core, wherein the corner rings can protect the core from being damaged;

(2) the bottom 7 is made of a thick paperboard with the thickness of 1.0mm, a paperboard strip with the thickness of 1.0mm is adhered to the edge of the bottom 7 to serve as a frame 8, and a paperboard core placing groove is formed in the frame 8;

(3) the cover 9 is a 1.0mm thick paperboard of the same size as the base;

(4) placing the core wrapped with the corner rings into a cardboard core placing groove, covering an upper cover 9, uniformly punching a plurality of binding holes at the peripheral edge positions after assembling the bottom, the core and the cover together, sequentially penetrating the binding holes by cotton ropes for binding and fixing, integrally bending the assembled bottom, core and cover, and shallow folding into a U shape, thereby completing the manufacture of the shielding plate.

Claims

1. A high-end converter transformer shielding plate structure is characterized in that: consists of a bottom (7), a core (11) and a cover (9); the paper board comprises a paper board core (1), gummed paper, semi-conductive paper (2), copper strips (3), cable strips (5) and leads (6), wherein the paper board core (1) is rectangular paper board, double-sided gummed paper is paved on the front side and the back side of the paper board core (1), two layers of cable strips (5) are wrapped at the peripheral edge positions of the paper board core (1), the semi-conductive paper (2) is adhered outside the double-sided gummed paper, the paper board core (1) and the cable strips (5) are completely wrapped by the semi-conductive paper (2), the copper strips (3) are paved on the semi-conductive paper (2) after hot pressing, the semi-conductive paper is fixed by hot-adhesive tapes, and the ends of the copper strips (3) are led out and connected with the leads (6); the bottom (7) is rectangular paperboard, a paperboard strip is adhered to the edge of the bottom (7) to serve as a frame (8), and a paperboard core placing groove is formed in the frame (8); the cover (9) is rectangular paperboard with the same size as the bottom; the core is arranged in the paperboard core placing groove, a plurality of binding holes are uniformly formed in the edge positions of the assembled paperboard core placing groove, the assembled paperboard core placing groove is sequentially bound by ropes through the binding holes, and the assembled paperboard core placing groove is U-shaped after being integrally bent.

2. A high-end converter transformer shielding plate structure according to claim 1, characterized in that: the lead (6) is led out from the frame (8) of the bottom (7).

3. A high-end converter transformer shield structure according to claim 1 or 2, characterized in that: a plurality of binding holes are uniformly formed in the edge positions of the bottom (7), the frame (8) and the cover (9).