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Improving process for hydrophobicity of external insulation of power equipment

A technology for power equipment and external insulation, applied in the field of power, can solve the problems of poor anti-pollution flashover effect, poor surface adsorption of super-hydrophobic coatings and power equipment, and achieve firm adsorption, stable insulation, and improved surface roughness.

Inactive Publication Date: 2017-11-21
STATE GRID HENAN ELECTRIC ZHOUKOU POWER SUPPLY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the use of the patented super-hydrophobic coating, the super-hydrophobic coating has poor adsorption to the surface of electrical equipment, and the anti-fouling flashover effect is poor.

Method used

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  • Improving process for hydrophobicity of external insulation of power equipment

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Effect test

Embodiment 1

[0026] A process for improving the hydrophobicity of the external insulation of electric equipment, comprising the following steps:

[0027] (1) Surface roughening of electrical equipment;

[0028] (2) Prepare 15 parts of polyperfluoroethylene propylene, 10 parts of vinyl-terminated silicone oil, 5 parts of dimethyl silicone oil, 5 parts of polyetheretherketone and 20 parts of diluent acetone into a viscous solution, and cast it on the surface of the power equipment. 300μm thick solution film, followed by vacuum defoaming;

[0029] (3) Spread 10 parts of hydrophobic nano-silica powder with a particle size of 100nm through a 200-mesh sieve evenly on the surface of the solution film in step (2), keep it for 20 hours, then bake at 80°C for 6 hours to form a film;

[0030] (4) Rinse off the residual powder on the surface of the film in step (3) with clean water and dry.

[0031] The viscosity of the vinyl-terminated silicone oil is 500 mPa·s.

[0032] The molecular weight of de...

Embodiment 2

[0034] A process for improving the hydrophobicity of the external insulation of electric equipment, comprising the following steps:

[0035] (1) Surface roughening of electrical equipment;

[0036] (2) Prepare 16 parts of polyperfluoroethylene propylene, 12 parts of vinyl-terminated silicone oil, 6 parts of dimethyl silicone oil, 6.5 parts of polyetheretherketone and 30 parts of diluent anhydrous ethanol into a viscous solution, and place it on the surface of electric equipment Casting into a solution film with a thickness of 500μm, followed by vacuum degassing;

[0037] (3) Spread 15 parts of hydrophobic nano-silica powder with a particle size of 50nm through a 270-mesh sieve evenly on the surface of the solution film in step (2), keep it for 22 hours, then bake at 90°C for 4 hours to form a film;

[0038] (4) Rinse off the residual powder on the surface of the film in step (3) with clean water and dry.

[0039] The viscosity of the vinyl-terminated silicone oil is 1000mPa·...

Embodiment 3

[0042] A process for improving the hydrophobicity of the external insulation of electric equipment, comprising the following steps:

[0043] (1) Surface roughening of electrical equipment;

[0044] (2) Prepare 18 parts of polyperfluoroethylene propylene, 13 parts of vinyl-terminated silicone oil, 7 parts of dimethyl silicone oil, 8 parts of polyetheretherketone and 40 parts of diluent n-hexane to form a viscous solution, and cast it on the surface of electric equipment Form a solution film with a thickness of 600 μm, followed by vacuum degassing;

[0045] (3) Spread 20 parts of hydrophobic nano-silica powder with a particle size of 20nm through a 400-mesh sieve evenly on the surface of the solution film in step (2), keep it for 25 hours, and bake at 100°C for 3 hours to form a film;

[0046] (4) Rinse off the residual powder on the surface of the film in step (3) with clean water and dry.

[0047] The viscosity of the vinyl-terminated silicone oil is 2000mPa·s.

[0048] The...

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Abstract

The invention belongs to the technical field of power and particularly relates to an improving process for the hydrophobicity of external insulation of power equipment. The improving process comprises the following steps: (1) roughening the surface of the power equipment; (2) preparing a viscous solution from 15-20 parts of fluoroethylenepropylene, 10-15 parts of vinyl-terminated silicon oil, 5-10 parts of dimethyl silicon oil, 5-10 parts of polyetheretherketone and 20-60 parts of a diluent, pouring a solution film with the thickness of 300-800mu m on the surface of the power equipment, and then, carrying out vacuum defoamation; (3) uniformly scattering 10-30 parts of hydrophobic nanopowder on the surface of the solution film in the step (2) by a sieve, keeping the scattering for 20-26h, and then, carrying out baking at 80-150 DEG C for 2-6h to form a film; and (4) removing residual powder on the surface of the film in the step (3) by flushing with clear water, and drying the film. The improving process disclosed by the invention is low in cost, safe and convenient to operate and high in adhesion strength of the film on the outer edge of the equipment and a substrate.

Description

technical field [0001] The invention belongs to the technical field of electric power, and in particular relates to a process for improving the hydrophobicity of the external insulation of electric power equipment. Background technique [0002] Pollution flashover of power equipment is a problem that has plagued the safe operation of power facilities for a long time. The outer insulating surface of power equipment will gradually accumulate dirt during operation. In a dry state, the resistance of the dirt layer is large, and the leakage current flowing through the dirt layer is small. No significant effect on dielectric strength. However, under fog, dew, drizzle, melting snow and other climatic conditions, the dirty layer is moistened, and the electrolyte in the dirty layer dissolves, which increases the surface conductance of the dirty layer and the leakage current. Due to the thermal effect of the leakage current, the current density A dry area appears in a larger part, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/18C09D183/07C09D183/04C09D161/16C09D5/25C09D7/12C09D7/00
CPCC09D127/18C08K2201/011C08K2201/013C08L2205/025C08L2205/035C09D5/00C08L83/04C08L61/16C08K3/36C08K9/04
Inventor 魏韬史宏伟程祥学何新好
Owner STATE GRID HENAN ELECTRIC ZHOUKOU POWER SUPPLY
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