CN-115132470-B - Outlet terminal suitable for elastic insulator encapsulation dry-type transformer winding

CN115132470BCN 115132470 BCN115132470 BCN 115132470BCN-115132470-B

Abstract

The invention discloses an outlet terminal suitable for an elastic insulator encapsulation dry-type variable winding, which comprises a copper nut and a clamping plate, wherein the copper nut is cylindrical and comprises a square body and a cylinder, the end part of the cylinder is connected with an outlet head of the variable winding to form the outlet terminal of the variable winding, a square hole is formed in the middle of the clamping plate, the square body of the copper nut is embedded into the square hole, so that the copper nut is fixed on the clamping plate, and the clamping plate and the elastic insulator are integrated into a whole after the copper nut is fixed. The invention can strengthen and adapt to the elastic insulator encapsulated winding.

Inventors

ZHANG ZHILI
ZHANG XINGWANG
SHEN SHANLIN
LI DEGE
BAO TIEHUA
SHAO CHUANYI
PAN MING
YANG QINGFU
ZHANG XIAOTONG
GU XIAOHU

Assignees

上海置信电气有限公司
中国电力科学研究院有限公司

Dates

Publication Date: 20260508
Application Date: 20220722

Claims (4)

1. An outlet terminal suitable for an elastic insulator encapsulated dry-type variable winding is characterized by comprising a copper nut and a clamping plate; the copper nut is cylindrical and comprises a tetragonal body and a cylindrical body, and the end part of the cylindrical body is connected with an outlet head of the variable winding to form an outlet terminal of the variable winding; A square hole is formed in the middle of the clamping plate, a square body of the copper nut is embedded into the square hole, the copper nut is fixed on the clamping plate, and the clamping plate and the elastic insulator are integrated after the copper nut is fixed; A plurality of through holes are uniformly distributed around the square hole and used for penetrating and fusing the clamping plate and the elastic insulator, and tooth-shaped structures are arranged around the clamping plate and used for penetrating and fusing the clamping plate and the elastic insulator; the tooth-shaped structure is a convex tooth or a groove, and the convex tooth or the groove is used for fusing the clamping plate and the elastic insulator in a penetration way; the clamping plate is subjected to surface roughening treatment and is coated with a coupling agent for improving the coating property of the clamping plate and the elastic insulator.
2. The outgoing terminal applicable to the elastic insulator encapsulated dry-type transformer winding according to claim 1, wherein the elastic insulator is made of silicon rubber or nitrile rubber material, and is obtained by vulcanizing and fixing after the transformer winding is encapsulated by liquid vacuum pressure.
3. The outgoing terminal applicable to the elastic insulator encapsulated dry type transformer winding according to claim 1, wherein the clamping plate is made of one of a silicone rubber plate, an epoxy glass cloth laminated plate, a diphenyl ether glass cloth plate and a polyimide glass cloth plate with a shore of 65 degrees or more.
4. The wire outlet terminal for an elastomeric insulation encapsulated dry variable winding of claim 1, wherein the square bore has an inner diameter that is consistent with an outer diameter of the square body, the square bore being adapted to capture a copper nut.

Description

Outlet terminal suitable for elastic insulator encapsulation dry-type transformer winding Technical Field The invention relates to an outgoing terminal suitable for an elastic insulator encapsulated dry-type transformer winding, and belongs to the technical field of dry-type transformers. Background The main stream type of the dry type transformer is an epoxy resin encapsulated dry type transformer, the insulating performance of the epoxy resin is stable, but the epoxy resin is a rigid body after solidification, and has the hidden danger of cracking under specific operating conditions, so that the problem of cracking under extreme environments can be completely eradicated by using rubber elastomer to replace epoxy resin for winding encapsulation. Meanwhile, the rubber elastic insulator encapsulates the winding, and special treatment is needed for the outgoing terminal which is frequently contacted with external force to meet the mechanical strength requirement. Disclosure of Invention The invention aims to overcome the defects in the prior art and provide an outlet terminal suitable for an elastic insulator encapsulated dry-type variable winding, which can strengthen and adapt to the elastic insulator encapsulated winding. In order to achieve the above purpose, the invention is realized by adopting the following technical scheme: the invention provides an outlet terminal suitable for an elastic insulator encapsulated dry-type transformer winding, comprising: copper nuts and clamping plates; the copper nut is cylindrical and comprises a tetragonal body and a cylindrical body, and the end part of the cylindrical body is connected with an outlet head of the variable winding to form an outlet terminal of the variable winding; The square hole is arranged in the middle of the clamping plate, the square body of the copper nut is embedded into the square hole, so that the copper nut is fixed on the clamping plate, and the clamping plate and the elastic insulator are integrated after the copper nut is fixed. Further, a plurality of through holes are uniformly distributed around the square holes, and the through holes are used for enabling the clamping plates to be communicated and fused with the elastic insulator. Further, tooth-shaped structures are arranged around the clamping plates and used for fusing the clamping plates and the elastic insulators in a penetrating mode. Further, the elastic insulator is made of silicon rubber or nitrile rubber, and is obtained by vulcanizing and fixing after filling and sealing the transformer winding through liquid vacuum pressure. Further, the cardboard is subjected to surface roughening treatment, and is coated with a coupling agent for increasing the adhesion of the cardboard to the elastic insulator. Further, the cardboard is one of a silicon rubber plate, an epoxy glass cloth laminated plate, a diphenyl ether glass cloth plate and a polyimide glass cloth plate with the material of more than 65 degrees of Shore. Further, the inner diameter of the square hole is consistent with the outer diameter of the square body, and the square hole is used for clamping the copper nut. Compared with the prior art, the wire outlet terminal suitable for the elastic insulator encapsulation dry-type variable winding has the beneficial effects that: The copper nut is cylindrical and comprises a square body and a cylinder, the end part of the cylinder is connected with an outlet head of the variable winding to form an outlet terminal of the variable winding, a square hole is formed in the middle of the clamping plate, the square body of the copper nut is embedded into the square hole, the copper nut is fixed on the clamping plate, and the clamping plate and the elastic insulator are integrated into a whole after the copper nut is fixed. The copper nut and the clamping plate are fixed, and the copper nut fixing device is simple in structure, easy to operate and good in fixing effect. After the copper nut is fixed with the clamping plate, the clamping plate is tightly fused with the elastic insulator, so that interphase insulation can be better optimized, interphase distance is reduced, and vibration noise of the interphase partition plate is avoided. The invention has simple structure, does not increase the cost, ensures the mechanical strength of the winding outgoing terminal, and can solve the problem that the product outgoing terminal is easy to tear. Drawings Fig. 1 is a structural view of an outlet terminal adapted for an elastic insulator-encapsulated dry-type transformer winding in accordance with embodiment 1 of the present invention; FIG. 2 is a schematic view of a copper nut according to example 1 of the present invention; FIG. 3 is a schematic view of a card board according to embodiment 1 of the present invention; FIG. 4 is a schematic view of a card in embodiment 2 of the present invention; Fig. 5 is a schematic diagram of a card board of an exploded terminal in embodiment 3 of the