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Optimized composite insulator spraying grading method

A water spray classification method and composite insulator technology, applied in the direction of analysis materials, measuring devices, instruments, etc., can solve the problems of easy misjudgment, uneven water spray, low accuracy, etc., achieve less experimental instruments and facilitate on-site detection , the effect of easy operation

Inactive Publication Date: 2018-05-29
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing water spray classification method is not perfect, the water spray is uneven, and the classification results are obtained by human subjective judgment. Compared with the contact angle method, the accuracy is lower, and misjudgment is prone to occur.

Method used

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  • Optimized composite insulator spraying grading method
  • Optimized composite insulator spraying grading method
  • Optimized composite insulator spraying grading method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0042] Take out the test piece and the whole insulator soaked in pure water for more than 96 hours, and dry it in the shade for the same time in the same environment to obtain the insulator test piece and the whole insulator with the same hydrophobic state. Use the contact angle method to measure the static contact angle and dynamic contact angle of the insulator test piece; use a fine water mist spray can (spray particle size is 10-30μm) to spray water on the surface of the entire insulator, and the water spray time is 3s each time. The distance from the sample is 15cm, the inclination angle between the nozzle and the sample is 45°, spray 15 times continuously. Take photos within 15 seconds after spraying water, and determine the hydrophobicity according to the photos. The experimental results are shown in Table 1 and Table 2.

[0043] Table 1. Correspondence between static contact angle and hydrophobic grade obtained from the test

[0044]

[0045] Table 2. Corresponden...

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Abstract

The invention discloses an optimized composite insulator spraying grading method, which includes steps of taking out an insulator test piece and the whole insulator which are immersed in the purifiedwater for over 96 hours; drying in the shade in the same environment for the same time to obtain the insulator test piece and the whole insulator which have the same hydrophobic state. By using a contact angle method, a static contact angle and a dynamic contact angle of the insulator test piece are measured; a water mist spraying can is applied to spray water to the surface of the whole insulator, the water bead / water membrane state diagram of the insulator surface is observed, the hydrophobic grade is matched with the hydrophobic grade corresponding to the contact angle, thus a correspondingrelationship is set up; according to the corresponding relationship, the hydrophobic grade of the to-be-tested insulator is confirmed. The method is simple in operation, convenient to detect on site,few in experimental instruments, simple in operation, and can provide accurate and reliable hydrophobic grade data reference for artificial pollution test.

Description

technical field [0001] The invention relates to the field of power equipment performance detection, in particular to a measurement method for detecting the hydrophobicity of composite insulators. Background technique [0002] With the rapid development of EHV and UHV transmission lines, the power system puts forward higher requirements on the external insulation performance of power equipment. Silicone rubber composite insulators are widely used in transmission lines because of their excellent hydrophobicity and anti-pollution flashover performance far superior to that of porcelain and glass insulators. However, with the extension of operating time, the continuous aging of silicone rubber materials, the continuous volatilization of hydrophobic small molecules, and the influence of complex factors such as the environment, the hydrophobicity of composite insulators is gradually reduced or even completely lost, which brings a negative impact on the safe operation of the power g...

Claims

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Application Information

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IPC IPC(8): G01N13/00
CPCG01N13/00
Inventor 郝艳捧毕继凯刘颖阳林廖一帆张福增
Owner SOUTH CHINA UNIV OF TECH
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