Method for manufacturing anti pollution flashover high tension ceramic and glass insulators

A technology for glass insulators and ceramic insulators, applied in inorganic insulators, quartz/glass/glass enamel, etc., can solve the problems of inability to reduce insulator fouling, inability to prevent fouling flash-off, poor anti-aging ability, etc., to reduce fouling flashover phenomenon, the best comprehensive anti-pollution flashover function, the effect of good stability

Active Publication Date: 2005-10-26
FUZHOU UNIV +2
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Problems solved by technology

The anti-pollution flashover ability of the above three types of insulators has been improved compared with conventional ceramic materials, and has been widely used in recent years, but they all have problems such as high price, low strength, and poor anti-aging ability to varying degrees, especially the insulator surface area cannot be reduced. pollution, so it cannot prevent pollution flash-down accidents

Method used

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  • Method for manufacturing anti pollution flashover high tension ceramic and glass insulators

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preparation example Construction

[0008] 1. Preparation method of titanium dioxide-based sol

[0009] (1) Prepare pure titanium dioxide sol according to the preparation steps of titanium dioxide sol in the preparation of titanium dioxide matrix described in patent 98115808.0, that is, hydrolyze the titanium alkoxide under the condition of acidic pH7 to obtain uniform and transparent The sol, the pH value of the sol was adjusted to 1-5 by dialysis. In the sol, the content of titanium dioxide is 0.01-10.0% by weight, and the rest is water.

[0010] (2) Prepare the composite titanium dioxide sol according to the preparation steps of the composite titanium dioxide sol in the preparation method of the titanium dioxide-containing binary composite oxide matrix described in patent 98115808.0, and adjust the pH value to 1-5. In the sol, the content of titanium dioxide is 0.01-10.0% by weight, and the content of another oxide component is 0.01-5.0% by weight.

[0011] (3) A surfactant with a content of 0.01-20.0% by w...

Embodiment 1

[0019] Embodiment 1: the preparation method of titania sol

[0020] Add 1.1 milliliters of concentrated nitric acid (68%) into 150 milliliters of deionized water to make a uniform solution, slowly drop 12.5 milliliters of tetraisopropyl titanate into the acidic aqueous solution under vigorous stirring, and hydrolyze the suspension containing white precipitate The solution was continuously stirred at 40°C until the white precipitate dissolved to form a uniform and transparent sol. Put the sol into a dialysis membrane bag and perform dialysis treatment with 2 liters of deionized water, and change the water every 12 hours until the final pH value of the dialysis water is 3.2. The sol was taken out from the dialysis bag to prepare a titania sol with a content of about 2.5% by weight.

Embodiment 2

[0021] Embodiment 2: the preparation method of titanium dioxide-silica composite sol

[0022] Under vigorous stirring, slowly drop 5 ml of ethyl orthosilicate into a solution prepared by 0.25 ml of concentrated nitric acid (68%) and 10 ml of deionized water, and continue stirring until a uniform transparent silica sol is formed. 10 ml of this sol was stirred and mixed with 100 ml of the titanium dioxide sol prepared in Example 1, and then the pH was adjusted to 2.8 by the same dialysis treatment as in Example 1. Finally, 5.0 g of polyethylene glycol was added and stirred evenly under electromagnetic stirring to obtain a mixed sol. In this sol, the titanium dioxide content was 2.3% by weight, the silicon dioxide content was 1.1% by weight, and the pH value was 2.8.

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Abstract

The present invention discloses a high voltage ceramic and glass insulator with the function of resisting pollution flashover and its preparation method. Said method includes the following processes: firstly, preparing titanium dioxide base sol, adding surfactant into the sol, then applying the titanium dioxide sol containing the above-mentioned surfactant or containing no surfactant on the surface of high-voltage ceramic and glass insulator, low-temperature heat treatment to make the titanium dioxide sol be solidified on the insulator surface so as to form a layer of nano inorganic film capable of raising pollution flashover resisting function of genral ceramic insulator.

Description

technical field [0001] The invention relates to high-voltage ceramic and glass insulators in high-voltage transmission and transformation lines, in particular to a preparation method for preparing a layer of nano inorganic film with anti-pollution flashover function on the surface of high-voltage ceramic insulators and glass insulators. Background technique [0002] Pollution flashover of high-voltage ceramic insulators has always been a serious problem in high-voltage transmission and transformation circuits. In recent years, environmental pollution caused by rapid economic growth has led to an upward trend in pollution flashover. The commonly used and effective anti-pollution flashover measure is to regularly clean the surface of the insulator. This kind of high-altitude or live-line operation has high cost, low efficiency and unguaranteed quality, and it is easy to cause industrial accidents. Therefore, how to maintain the long-term pollution resistance of the insulator s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/50C04B41/85H01B3/08
CPCC04B2111/2061C04B2111/92H01B3/08C04B41/87C04B41/5024C04B41/009C04B41/5041C04B41/4537C04B2103/40C04B35/00
Inventor 付贤智曾文琳刘平施倩戴文新廖福旺陈旬林韩王绪绪孙立新邵宇蔡鸿贤
Owner FUZHOU UNIV
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