Method for measuring thickness of RTV coating of insulator

A technology of coating thickness and measurement method, which is applied in the field of measurement of RTV coating thickness of insulators, and can solve problems such as difficulty in guaranteeing application accuracy

Active Publication Date: 2016-02-24
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods are all used for the surface coating of magnetic or non-magnetic metals, and the application accuracy is difficult to guarantee for the coating thickness of non-metallic surfaces

Method used

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  • Method for measuring thickness of RTV coating of insulator
  • Method for measuring thickness of RTV coating of insulator
  • Method for measuring thickness of RTV coating of insulator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for measuring the thickness of an insulator RTV coating, comprising the steps of:

[0034] S1. Determine the components of the RTV paint to be tested. The ratio of organic components and fillers in the silicone rubber in the RTV coating can be measured by thermogravimetric, infrared and other methods.

[0035] S2. Take a number of transparent glass sheets numbered ① to ⑨, keep the surface clean and dry; spray the RTV paint in S1 on the glass sheet, control the thickness of the ① coating to 0.1mm, and the thickness of the ⑨ coating to 0.50 mm, the thickness interval between two adjacent coatings is 0.05mm, and the thickness of the coating is recorded as f(x i ).

[0036] S3. The parameters of the laser are nanosecond level, Nd:YAG pulsed laser, the wavelength is 1064nm, the defocus amount is -100mm~+100mm, and the energy is 50-200mJ.

[0037] S4. Place glass pieces ① to ⑨ coated with RTV paint under the lens of the laser respectively. Adjust the lens setting...

Embodiment 2

[0043] S1. Select an RTV coating, and use a pulsed laser with specific parameters (laser parameters can refer to Example 1) to continuously bombard a point of the RTV coating, so that a hole with increasing depth is formed at the point.

[0044] S2. Record the number of pulsed laser bombardments and the corresponding breakdown thickness of the RTV coating (that is, the disappearance thickness of the RTV coating) as shown in the following table:

[0045]

[0046] According to the above table, points are drawn on the RTV coating bombardment breakdown times-RTV coating thickness coordinates, and then curve fitting is performed on these points to obtain:

[0047] y=3.4983x+17.459.

[0048] S3. When it is necessary to measure the RTV coating of the same material, it is only necessary to measure the number of times when the pulsed laser bombardment of the same parameters penetrates the RTV coating. According to the above formula f(x)=ax+b, the type can be calculated. The thickne...

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Abstract

The invention discloses a method for measuring the thickness of the RTV coating of an insulator, comprising the following steps: S1, bombarding the RTV coating with set pulse laser, and recording the number of bombardment times (x) of laser when the RTV coating is broken through; and S2, calculating the thickness f(x) of the RTV coating according to the formula f(x)=a*x+b, wherein the parameters a and b are determined through the following experiment steps: bombarding the RTV coating with set pulse laser, recording the thickness of the broken-through RTV coating and the corresponding number of bombardment times of laser, and fitting the curve f(x)=a*x+b to obtain the parameters a and b. No matter how long the RTV coating of the insulator operates, the thickness of the RTV coating can be obtained by measuring the number of bombardment times of laser after checking. The method is suitable for field application.

Description

【Technical field】 [0001] The invention relates to a method for measuring the thickness of an insulator RTV coating. 【Background technique】 [0002] A good external insulation state of the transmission line is an important guarantee for the safe operation of the power system. After the silicone rubber materials represented by composite insulators (synthetic insulators), climbing skirts and room temperature vulcanized silicone rubber coatings (RTV coatings) are widely used in the field of external insulation of power systems (especially in the field of high-voltage external insulation), the durability of external insulation equipment Pollution flashover capability has been significantly improved. In my country's power grid, RTV antifouling flashover coatings with room temperature vulcanized silicone rubber as the main component are widely used. [0003] RTV anti-pollution flashover paint is coated on the surface of electric porcelain or glass insulators, making the originall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/06
Inventor 王希林王晗叶蔚安贾志东
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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