A kind of pure electrical laminated wood and preparation method thereof

A technology of electrical laminated wood and wood segments, applied in the field of electric power, can solve the problems of low mechanical strength, easy degradation, and breakdown of high-grade transformers, so as to reduce the risk of breakdown, reduce the content of grease and wood acid, and increase The effect of mechanical properties

Active Publication Date: 2021-02-09
宁安市安杰木业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are two kinds of insulating laminates commonly used in the market: electrical laminated wood and laminated cardboard. Among them, electrical laminated wood has good mechanical properties, but according to the current processing technology, the produced electrical laminated wood has poor insulation and cannot meet the high requirements. Requirements for the use of grade transformers; although the insulating cardboard produced on the market can meet the insulation requirements, it has the characteristics of low mechanical strength, weak plasticity, easy degradation, and high price, which hinders the development of transformers in the power industry
[0003] At present, many companies in the industry have made a lot of research and development investment in the technology of improving the insulation of electrical laminated wood, but due to technical limitations, they cannot overcome the problems of low penetration rate of laminated wood to transformer oil and hydrogen generation during use. , and too much ash and impurities in wood have caused frequent breakdowns and other accidents in the manufacture of high-grade transformers. Now it is urgent to make research and development breakthroughs in technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of electrical laminated wood, made of at least 5 layers of rotary-cut veneer, generally an odd number of layers, so that it is convenient to press without cracking, and there is no break point on the rotary-cut veneer that makes up the laminated wood. Its main purpose is to make When the laminated wood is soaked in oil, it can make full use of the tube holes in its own properties, so that the laminated wood is soaked in transformer oil, and the laminated wood is pressed into laminated wood through the criss-cross arrangement of multi-layer rotary-cut veneers, so as to achieve better Insulation effect, the thickness of the rotary-cut veneer in this technical solution is between 1.5-3mm, preferably 2-2.5mm, and the material of the rotary-cut veneer is preferably wood from alpine regions such as birch or beech, because this kind of material mostly grows in In alpine regions, the plasticity and mechanical properties are relatively strong, and the density is uniform an...

Embodiment 2

[0022] For the preparation method that the electrical laminated wood in the present invention adopts in embodiment 1, comprises the steps:

[0023] S1: First, select birch and beech wood from alpine regions, cut into sections and peel off the bark, then use deionized water to steam in a stainless steel container for heating and cooking, and increase the solution by 1°C per hour until the water temperature reaches 35- 45°C, preferably heated to 40°C, to obtain wood segments to be processed for the next step;

[0024] S2: The wood segment obtained in S1 is rotary-cut by a rotary cutting machine, and a stainless steel support net is used in the rotary-cutting process to prevent metal ions from infecting the rotary-cut veneer, and then the rotary-cut veneer is subjected to the first Drying, also use stainless steel support nets and brackets during each drying process;

[0025]S3: Continue to put the rotary cut veneer dried in S2 into deionized water for cooking, preferably after ...

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Abstract

The invention discloses a pure electric laminated wood and a preparation method thereof. A non-break-point rotary cut veneer is used as a raw material, the compatibility of the laminated wood and transformer oil can be improved by using the biological characteristics of wood tube holes, the acidity and alkaline of wood is changed through the processes such as raw material wood lignin extraction, the insulation performance of the laminated wood is improved, and the service life of a transformer is prolonged; and deionized pure water is adopted as basic cooking liquid, through an oxygen-alkali method and a chemical extraction method, the organic matters and inorganic matters in the rotary cut veneer fibers are removed, the content of metal minerals and ash is reduced, the electric strength of the laminated wood is improved, by adjusting the acidity and alkaline of the rotary cut veneer of the laminated wood, the laminated wood manufactured by the preparation method can be installed in the transformer so that corrosion of the transformer equipment is eliminated, the insulation properties of the equipment are improved, and the service life of the transformer and mutual inductor equipment is prolonged.

Description

technical field [0001] The invention belongs to the electric power industry, and in particular relates to an electrical laminated wood and a preparation method thereof. Background technique [0002] The development and use of laminated wood has increased benefits and reduced costs for the transformer manufacturing industry. However, with the development of the power industry, transformers are developing in the direction of small volume and high voltage level, and the variety is also increasing. Thus, insulating laminates with high insulating properties and high mechanical strength are required. At present, there are two kinds of insulating laminates commonly used in the market: electrical laminated wood and laminated cardboard. Among them, electrical laminated wood has good mechanical properties, but according to the current processing technology, the produced electrical laminated wood has poor insulation and cannot meet the high requirements. Requirements for the use of g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27D1/04B27K3/20B27K5/00B27K5/04B27K3/02B32B21/13
CPCB27D1/04B27K3/0207B27K3/0214B27K3/20B27K5/001B27K5/04B32B21/13
Inventor 耿富杰徐君
Owner 宁安市安杰木业有限公司
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