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Manufacturing method of novel dry-type capacitive impregnated fiber high-voltage bushing

A technology of high-voltage bushing and manufacturing method, which is applied in the electrical field, and can solve the problems of excessive discharge of high-voltage bushing, low product qualification rate, and large lap gap of 2400tex non-alkali glass fiber insulation strands, etc.

Inactive Publication Date: 2021-09-10
郑筠睿
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 2. Using 2400tex non-alkali glass fiber insulation tow has a too large lap gap, which can easily cause partial discharge exceeding the standard of high-voltage bushings, and the product qualification rate is low, which seriously restricts the development of rubber-impregnated fiber dry-type capacitive high-voltage bushings;
[0005] 3. The insulating layer of this type of bushing adopts simple insulating material, which has poor insulating performance

Method used

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Examples

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Effect test

Embodiment 1

[0040] A method for manufacturing a novel dry capacitive rubber-impregnated fiber high-voltage bushing, specifically comprising the following steps:

[0041] (1) Manufacturing of mandrel and mandrel: use copper (aluminum) rods to grind and roughen the surface of aluminum tubes (rods) and copper tubes (rods) through a sand bar machine or other measures, and the surface roughness is between 6.3;

[0042] (2) Preparation of matrix glue: Take 100 parts of bisphenol A epoxy resin (E51), 70 parts of methyltetrahydrophthalic anhydride (MTHPA), 0.8 parts of phenol (DMP-30), and 0.3 parts of polydimethylsiloxane part, 0.3 part of liquid carboxylated nitrile rubber, 0.1 part of anti-aging preparation, mixed uniformly by a mixer for subsequent use;

[0043] (3) Insulation layer production: Use 7 (different tows for different voltage levels) bundles of 1100tax glass fibers to impregnate the prepared matrix glue through the dipping tank, adjust the winding tension of the glass fiber yarn t...

Embodiment 2

[0053] A method for manufacturing a novel dry capacitive rubber-impregnated fiber high-voltage bushing, specifically comprising the following steps:

[0054] (1) Manufacturing of mandrel and mandrel: use copper (aluminum) rods to grind and roughen the surface of aluminum tubes (rods) and copper tubes (rods) through a sand bar machine or other measures, and the surface roughness is between 25;

[0055] (2) Preparation of matrix glue: take 100 parts of bisphenol A epoxy resin (E51), 80 parts of methyltetrahydrophthalic anhydride (MTHPA), 1.3 parts of phenol (DMP-30), and 0.6 parts of polydimethylsiloxane 0.6 part, 0.6 part of liquid carboxylated nitrile rubber, 0.2 part of anti-aging preparation, mix uniformly by mixer for subsequent use;

[0056] (3) Insulation layer production: Use 18 (different tows for different voltage levels) bundles of 1200tax glass fibers to impregnate the prepared matrix glue through the dipping tank, adjust the winding tension of the glass fiber yarn t...

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Abstract

The invention relates to the electrical field, and particularly relates to a manufacturing method of a novel dry-type capacitive impregnated fiber high-voltage bushing. The method specifically comprises the following steps: manufacturing a core rod and a core mold, manufacturing a matrix glue solution, manufacturing an insulating layer, winding a core body, manufacturing a capacitive screen, manufacturing an end screen leading-out wire and manufacturing an external insulating layer. The flange is sealed.

Description

technical field [0001] The invention relates to the electrical field, in particular to a method for manufacturing a novel dry capacitive glue-impregnated fiber high-voltage bushing. Background technique [0002] At present, the rubber-impregnated fiber dry-type capacitor high-voltage bushing used in the power system mainly adopts the capacitor core produced by the glass fiber wet winding process as the main insulation structure. The cured matrix material of the capacitor core is a mixed glue of bisphenol A epoxy resin, methyl tetrahydrophthalic anhydride, benzyl dimethylamine and carboxylated nitrile rubber, 2400tex non-alkali glass fiber, and glass fiber non-woven fabric is semi-conductive The belt is a capacitive screen, and this type of sleeve has the following defects: [0003] 1. The dry-type capacitive high-voltage bushing made of the above materials, because the capacitive screen uses a semi-conductive tape as the capacitive screen, and the semi-conductive tape is ma...

Claims

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Application Information

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IPC IPC(8): H01B19/00
CPCH01B19/00
Inventor 郑筠睿
Owner 郑筠睿
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