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A preparation method of a three-layer gradient gis/gil support insulator

A technology for supporting insulators and insulators, applied in insulators, 3D object support structures, auxiliary operations of additional layers, etc., which can solve the problems of mechanical/thermal properties such as thermal expansion coefficient of materials, poor controllability of lamination and centrifugal methods, and insulator processing time. Long and other problems, to achieve high forming accuracy and defect suppression ability, improve electric field distribution, clear boundary contour effect

Active Publication Date: 2022-04-22
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the current gradient insulators lack effective rapid manufacturing solutions, and the lamination and centrifugation methods have poor controllability, and the size of the molding is limited. Using 3D printing technology can avoid the above problems to a certain extent, but the insulator can only be completed by 3D printing. Manufacturing processing time is long, and mechanical / thermal properties such as thermal expansion coefficient of the material are difficult to match with traditional vacuum casting epoxy resin

Method used

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  • A preparation method of a three-layer gradient gis/gil support insulator

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preparation example Construction

[0055] see figure 1 , a preparation method of a three-layer gradient GIS / GIL support insulator of the present invention, the support insulator is divided into three parts: a light-cured dielectric transition region, a heat-cured high-dielectric region, and a heat-cured low-dielectric region; the specific steps are as follows :

[0056] S1. Light-cured dielectric transition area: The light-cured dielectric transition area is made of light-cured 3D printing photosensitive composite materials. The main functions include insulating internal gradient dielectric constant transition, metal mold internal support and fixation, and serving as a heat-cured high dielectric area. Mold, its manufacturing steps are:

[0057] S101. With the optimization goal of reducing the electric field along the surface of the insulator and the electric field intensity at the three joint points on the flange side, the insulator is discretized, and the dielectric constant in each tiny unit can be determined ...

Embodiment 1、110k

[0092] Example 1, 110kV disc support insulator

[0093] A method for preparing a three-layer gradient GIS / GIL support insulator, which divides the insulator into three parts: a light-cured dielectric transition region, a heat-cured high-dielectric region, and a heat-cured low-dielectric region.

[0094] The light-cured dielectric transition area is made of light-cured 3D printing photosensitive composite materials. The main functions include insulating the internal gradient dielectric constant transition, internal support and fixing of the metal mold, and acting as a heat-cured high-dielectric area mold. The manufacturing steps are:

[0095] S101. Taking the reduction of the electric field intensity in the region at the three junction points on the flange side of the 110kV disc support insulator as the optimization goal, the insulators are discretized, and the dielectric constant in each tiny unit can be calculated based on the dielectric constant value of the matrix (here sele...

Embodiment 2

[0115] Example 2: 110kV disc support insulator

[0116] A method for preparing a three-layer gradient GIS / GIL support insulator, which divides the insulator into three parts: a light-cured dielectric transition region, a heat-cured high-dielectric region, and a heat-cured low-dielectric region.

[0117] The light-cured dielectric transition area is made of light-cured 3D printing photosensitive composite materials. The main functions include insulating the internal gradient dielectric constant transition, internal support and fixing of the metal mold, and acting as a heat-cured high-dielectric area mold. The manufacturing steps are:

[0118] S101. With the optimization goal of homogenizing the electric field strength along the surface of the 110kV disc support insulator, discretize the insulator, and the dielectric constant in each micro unit can vary from the dielectric constant value of the matrix (selected as 5.8 here) to the dielectric constant change The upper limit (sele...

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Abstract

The invention discloses a preparation method of a three-layer gradient GIS / GIL supporting insulator. Taking reducing the electric field strength along the surface or local area of ​​the insulator as the optimization goal, a variable density algorithm is used to solve the optimal spatial distribution of the internal dielectric constant of the supporting insulator; As a result, the area where the dielectric constant changed was divided into a dielectric constant transition area and a high dielectric area, and the combined contour of the dielectric constant transition area was extracted, and then a hollow with support and resin pouring opening was generated by photocuring 3D printing. The dielectric constant transition region; a high dielectric filler / polymer blend is used to prepare a thermally curable high dielectric composite material, and then the high dielectric composite material is poured into the dielectric constant transition region and placed into a metal mold as a whole The thermally-curable high-dielectric composite material is prepared by blending low-dielectric fillers / polymers, and then poured into metal molds. After curing in vacuum, three-layer gradient GIS / GIL supporting insulators can be obtained .

Description

technical field [0001] The invention belongs to the technical field of high-voltage power equipment manufacturing, and in particular relates to a preparation method of a three-layer gradient GIS / GIL support insulator. Background technique [0002] Gas Insulated Switchgear (GIS) is widely used in EHV and UHV substations because of its small footprint and stable operating environment. Gas Insulated Transmission Line (GIL), as a new type of advanced transmission method, has the advantages of large transmission capacity, small transmission loss, and high safety. It is often used as an alternative to overhead lines and is used in special transmission environments. . [0003] In GIS / GIL power equipment, the supporting insulator plays the role of supporting the metal guide rod, isolating the potential, and sealing the gas chamber. However, when its structural design is unreasonable or there are defects such as bubbles and metal particles on the surface, the excellent insulation p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C69/00B29C64/106B29C64/176B29C64/188B29C39/02B29C39/10B29C39/42B29C39/44H01B19/00B33Y10/00B33Y50/02B29K63/00B29L31/34
CPCH01B19/00B29C69/00B29C64/106B29C64/176B29C64/393B29C64/188B29C39/003B29C39/42B29C39/10B29C39/44B29C39/025B33Y10/00B33Y50/02B29L2031/3412B29K2063/00
Inventor 王超张冠军李文栋尹昊阳杨雄张宇程
Owner XI AN JIAOTONG UNIV
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