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Compounding of inorganic anti-pollution coating for high pressure insulator surface and preparation process thereof

A technology of anti-fouling flashover coatings and high-voltage insulators, which is applied in the direction of art coatings, insulators, coatings, etc., to achieve high chemical stability, convenient operation, and avoid safety hazards and additional costs.

Active Publication Date: 2007-07-18
FUZHOU UNIV +2
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an inorganic anti-fouling flashover paint formulation and preparation method for the surface of high-voltage insulators in view of the shortcomings of existing organic polymer coatings used on the surface of high-voltage insulators, especially porcelain insulators

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  • Compounding of inorganic anti-pollution coating for high pressure insulator surface and preparation process thereof

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preparation example Construction

[0014] The preparation method of formula 1: (1): Hydrolyze the titanium alkoxide under the condition of acidic pH7 to obtain a uniform and transparent sol, adjust the pH value of the sol to 1-5 by dialysis, Prepare pure titanium dioxide sol; (2): add hydrogen peroxide with a weight ratio of 0.01 to 1.0% into the pure titanium dioxide sol to prepare an inorganic antifouling flashover coating.

[0015] The preparation method of formula 2: (1): prepare the binary composite oxide sol of titanium dioxide, and adjust the pH value to 1-5; (2): add the binary composite oxide sol of titanium dioxide in a weight ratio of 0.01- 1.0% hydrogen peroxide to prepare an inorganic antifouling flashover coating.

[0016] Inorganic anti-pollution flashover coating is used for off-line coating on the surface of newly prepared conventional insulators. The off-line coating method is: first clean the surface of the insulator, and then spray the paint on the surface of the insulator after drying until...

Embodiment 1

[0020] Formulation 1: Preparation of inorganic antifouling flashover coating

[0021] Add 1.1mL of concentrated nitric acid (68%) into 150mL of deionized water to make a uniform solution, slowly drop 12.5mL of tetraisopropyl titanate into the acidic aqueous solution under vigorous stirring, and hydrolyze the obtained suspension containing white precipitate Stirring was continued at 40 °C until the white precipitate dissolved to form a homogeneous transparent sol. Put the sol into a dialysis membrane bag and use 1L deionized water for dialysis treatment, and change the water every 8 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 weight content of about 2.5%.

[0022] Under vigorous stirring, 0.1 mL of hydrogen peroxide reagent was added to the prepared 100 mL of titanium dioxide sol, and the inorganic anti-fouling flashover coating A was obtained after stirring evenly.

Embodiment 2

[0024] Formula 2: Preparation of Inorganic Antifouling Flashover Coating

[0025] Under vigorous stirring, slowly drop 10 mL of tetraethyl orthosilicate into a solution prepared by 0.5 mL of concentrated nitric acid (68%) and 20 mL of deionized water, and continue stirring until a uniform transparent silica sol is formed. Stir and mix 10 mL of this sol with 100 mL of the titanium dioxide sol prepared in Example 1, and then perform the same dialysis treatment as in Example 1 to adjust the pH value to 2.8. In this sol, the weight content of titanium dioxide is 2.3%, the weight content of silicon dioxide is 1.1%, and the pH value is 2.8.

[0026] 0.1 mL of hydrogen peroxide reagent was added to the prepared 100 mL of titanium dioxide-based composite sol, and the inorganic antifouling flashover coating B was obtained after stirring evenly.

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Abstract

The present invention provides recipe and preparation process of inorganic pollution flashover preventing paint for high voltage insulator. The first kind of the paint consists of pure titania sol and hydrogen peroxide, and is prepared through preparing pure titania sol and adding hydrogen peroxide into the pure titania sol. The second kind of the paint consists of binary composite titania sol and hydrogen peroxide, and is prepared through preparing pure titania sol and adding hydrogen peroxide into the binary composite pure titania sol. The present invention can raise the self-cleaning performance of titania, and has simple technological process and facile material. The paint can form nanometer coating of inorganic matter in the surface of the outdoor insulator to reduce pollution and prevent pollution flashover.

Description

technical field [0001] The invention relates to high-voltage insulator anti-pollution flashover technology in high-voltage transmission and transformation lines, and more particularly relates to an inorganic anti-pollution flashover paint formulation and a preparation method for the surface of high-voltage insulators. Background technique [0002] Pollution flashover of high-voltage 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. It is generally believed that two conditions must be met for pollution flashover to occur on insulators: one is the accumulation of a certain amount of pollution on the surface of the insulator, which is the prerequisite for pollution to occur; Pollution flashover occurs when the conductivity increases under humidity. Therefore, there are two ways to avoid pollution flasho...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D5/06H01B17/50H01B17/42
Inventor 付贤智林韩刘平吴文宣戴文新曾文琳陈旬施倩王绪绪廖福旺员汝胜李学永
Owner FUZHOU UNIV
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