A method of obtaining a protective coating of high-voltage insulator

 

(57) Abstract:

Use: manufacture of protective coatings of high voltage polymer insulators external performance. The inventive is applied before forming the protective jacket on fiberglass core intermediate sublayer containing, wt.%: talc 8 - 20; -aminopropyltriethoxysilane 0,8 - 2,0; monoparesis 0,2 - 0,6; Sevilen - rest, followed by drying, and polymer composition as a polymer base contains a high-pressure polyethylene (LDPE) or a modified copolymer of ethylene and vinyl acetate (CMEA), or a mixture of a copolymer of ethylene with vinyl acetate or a modified copolymer of ethylene and vinyl acetate with a high-pressure polyethylene in the following ratio, wt.%: aluminum hydroxide 40 - 50; Agidol-2 0,1 - 0,4; benzene OA 0,15 - 0,5; HDPE or modified CMEA or a mixture or modified CMEA CMEA with high-pressure polyethylene rest. For use as polymeric bases or modified CMEA CMEA mixed with high-pressure polyethylene in a ratio of(10 - 20) : (80 - 90). As the modified CMEA use CMEA, modified silanandabhivamsa the Noah floor, received the claimed method allows to obtain high electrical characteristics, adhesion and mechanical strength of the insulator. Improves the performance of the process, and reduces the cost of the finished products. 3 C.p. f-crystals, 2 tab.

The invention relates to electrical engineering, and in particular to methods of manufacturing a protective coating of high voltage polymer insulators external performance.

It is known that the use of insulators protective ribbed coating of polymer materials, compared to conventional protective structures made of porcelain and glass, has technical and economic advantages due to their mechanical and electrical properties, low weight and ease of installation.

A known method of manufacturing a protective coating of high-voltage insulators made of polymeric materials, providing for the application of fiberglass rod liquid sealant of the siloxane polymer, narisovanie on the rod prefabricated elements ribbed cover, closing them in the axial direction on the shaft, heat treated rod elements ribbed coating in an oven at a special regime [1]

The disadvantage of this method astadia manufacturing facilities do not provide the technical and environmental safety.

Closest to the technical essence and the achieved effect is a method of obtaining electrical insulator, where the fiberglass pipe or rod put intermediate layer of the same material or its modifications and ribbed floor and reinforced this layer of continuous filaments, such as glass or polymer, arranged tangentially or spiral-cross around the carrier pipe. The intermediate reinforcing layer and the carrier pipe can be made of ribbed [2]

The disadvantage of this method is the technological complexity of obtaining insulators, the need for special equipment and premises for winding, possible environmental threat, high cost of production, low productivity of the production process.

In the framework of the invention, a method for obtaining a protective coating of high-voltage insulator, comprising forming on a fiberglass rod (pipe) ribbed protective jacket of polymeric compositions.

The novelty of the method consists in the application before forming the protective jacket on fiberglass core intermediate sublayer containing, by weight. Talc 8-20

-Aminopropane polymer base contains a high-pressure polyethylene (LDPE) or a modified copolymer of ethylene and vinyl acetate (CMEA), or a mixture or modified CMEA CMEA with high-pressure polyethylene, in the following ratio, wt. Aluminum hydroxide 40-50 Agidol-2 of 0.1-0.4 Benzene OA 0,15-0,5

Polyethylene high

pressure (LDPE) or

modified with-

the polymer of ethylene with TS-

dilatatum (CMEA)

or a mixture of CMEA or modi-

fitiavana CMEA with HDPE Else

For use as a polymer base, or modified CMEA CMEA mixed with LDPE in the ratio (10-20):(80-90). As the modified CMEA use CMEA, modified silanandabhivamsa connec - tions (for example, the following fragments

[-(CH2)4-CH2-Si-O-]

As the use HDPE polyethylene with a melt flow index not lower than 2.0 g/10 min.

Protective coating, obtained by the claimed method allows to obtain high electrical characteristics, adhesion and mechanical strength of the insulator. Improves the performance of the process, and reduces the cost of the finished products. No winding polymeric or glass fibers improves the manufacturability of the application of protective coatings due to the lack of special equipment and facilities for winding.

The introduction of the intermediate sublayer determine the Yu strength of the protective coating.

The manufacturer of the protective jacket from the composition containing: aluminum hydroxide, Agidol-2, benzene OA, and as the basis HDPE or modified CMEA or a mixture of CMEA with HDPE or a blend of the modified CMEA with HDPE in the claimed ratio allows to obtain high performance protective coatings by the method of injection molding with the use of industrial thermoplas - avtomatov that improves the manufacturability of the product as a whole and reduces the cost of the finished products.

The method is as follows.

On a fiberglass rod with a diameter of 12 mm is applied in any manner by spraying, dipping, brush, wrapped ready tape) intermediate sublayer of the composition containing talc, aminopropyltriethoxysilane, monoparesis, Sevilen thickness of 50-100 μm, dried at 60-100aboutC for 1-3 hours depending on the thickness of the layer, and then molded using thermoplastic machines at 160aboutWith a protective coating in the form of ribbed shirt fiberglass rod coated with a sublayer of the claimed composition.

The test conditions and results are summarized in table.1 and 2.

The tests were carried out in accordance with the requirements of GOST 28856-90.

and on the level of performance coatings, manufactured according to the method prototype. At the same time, the proposed method has higher adaptability and efficiency.

1. A method of OBTAINING a PROTECTIVE COATING of high-VOLTAGE INSULATOR, comprising forming on a fiberglass core ribbed protective jacket of polymeric composition, wherein before forming the protective jacket on the fiberglass core is applied to the intermediate coating of the following composition, wt.

Talc 8 20

Aminopropyltriethoxysilane 0,8 2,0

Monoparesis 0,2 0,6

Sevilen Else

followed by drying, and polymer composition as a polymer base contains a high-pressure polyethylene or a modified copolymer of ethylene and vinyl acetate, or a mixture of a copolymer of ethylene with vinyl acetate or a modified copolymer of ethylene and vinyl acetate with a high-pressure polyethylene in the following ratio, wt.

Aluminum hydroxide 40 50

Agidol 0,1 0,4

The benzene OA 0,15 0,5

The high-pressure polyethylene or a modified copolymer of ethylene and vinyl acetate, or a mixture of a copolymer of ethylene with vinyl acetate or a modified copolymer of ethylene with vinyl is Jena with vinyl acetate or a modified copolymer of ethylene and vinyl acetate is mixed with high-pressure polyethylene in the ratio 10 20 80 90.

3. The method according to PP.1 and 2, characterized in that the modified copolymer used is a copolymer of ethylene with vinyl acetate, modified silanandabhivamsa connections.

4. The method according to PP.1 and 2, characterized in that as high-pressure polyethylene used polyethylene with a melt flow index not lower than 2.0 g/10 min

 

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