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Transformer-used insulation paper with low water absorption coefficient and small shrinking percentage

A low shrinkage, transformer technology, applied in the field of transformers, to achieve the effect of enhancing tensile strength, not easy to deform, and reducing potential safety hazards

Inactive Publication Date: 2016-03-02
TONGLING SANJIA TRANSFORMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using mica to modify insulating paper can obtain insulating paper with better performance, but there are few researches on this aspect at home and abroad.

Method used

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Experimental program
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Embodiment Construction

[0013] An insulating paper for transformers with low water absorption coefficient and small shrinkage rate, prepared from the following raw materials in parts by weight (kg): silane coupling agent kh5500.6, mica 6, glycine 1, silane coupling agent kh5700.3, emulsification Agent OP, sodium dodecylsulfonate 0.2, E44 epoxy resin 2, polyacrylamide 0.5, pulp board 500, silicon carbide fiber 2.8, magnetized calcium 1, steel slag powder 1.2, polyacrylonitrile fiber 3.2, deionized water amount .

[0014] The insulating paper for transformers with low water absorption coefficient and small shrinkage rate is prepared by the following specific steps:

[0015] (1) Add the silane coupling agent kh550 into the solution with a mass ratio of ethanol to water of 1:1, heat it in a water bath to 35°C, add dropwise oxalic acid to adjust the pH value to 4, hydrolyze for 1 hour, and dip the mica sheet into Stir and soak in 75% ethanol for 1 h, then ultrasonically wash for 10 min, soak in deionized...

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Abstract

The invention discloses transformer-used insulation paper with a low water absorption coefficient and a small shrinking percentage. The insulation paper is prepared from, by weight, 0.6-0.7 part of a silane coupling agent kh 550, 6-8 parts of mica, 1-1.5 parts of glycine, 0.3-0.4 part of a silane coupling agent kh 570, 0.1-0.2 part of emulgator OP-10, 0.2-0.3 part of sodium dodecyl sulfate, 2-3 parts of E44 epoxy resin, 0.5-0.6 part of polyacrylamide, 500-550 parts of pulp boards, 2.8-3.4 parts of silicon carbide fibers, 1-1.5 parts of magnetization calcium, 1.2-1.5 parts of steelmaking slag powder, 3.2-3.5 parts of polyacrylonitrile fibers and a proper amount of deionized water. The preparation method of the insulation paper is simple, and the prepared insulation paper has a low water adsorption property and small shrinking percentage, is not prone to deformation, has good prospect when used for transformers, lowers potential safety hazards and is worthy of popularization.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to insulating paper for transformers with low water absorption coefficient and small shrinkage rate. Background technique [0002] In recent years, with the rapid development of my country's electric power, electrical, electronics, home appliances and communications industries, people have higher and higher requirements for transformers. Cellulose insulating paper is one of the most widely used internal insulating materials in oil-immersed power transformers. Since it cannot be replaced during operation, its mechanical and insulating properties directly determine the service life of the transformer. In the actual transformer, the insulating paper is subjected to high-intensity electric field stress for a long time, and once a breakdown occurs, the transformer will fail. If the electrical performance of insulating paper can be improved, the usage of insulating paper can be save...

Claims

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Application Information

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IPC IPC(8): D21H15/12D21H13/44D21H13/38D21H13/14D21H17/67D21H27/12H01B3/52H01F27/32
CPCD21H15/12D21H13/14D21H13/38D21H13/44D21H17/00D21H17/07D21H17/52D21H17/55D21H17/67D21H17/74D21H21/08D21H21/14D21H21/18D21H21/38H01B3/52H01F27/32
Inventor 李新满
Owner TONGLING SANJIA TRANSFORMER
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