Aging evaluation method for liquid silicon rubber for power station equipment

A technology of liquid silicone rubber and power stations, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of hardening and brittleness, the decrease of the hydrophobicity of the outer insulating sheath, and the impact on the safe operation of power station equipment, so as to achieve intuitive detection results. The detection method is novel and the effect of promoting safe and stable operation

Inactive Publication Date: 2016-12-21
EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID +1
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AI Technical Summary

Problems solved by technology

[0003] During long-term grid-hanging operation, the liquid silicone rubber used as the outer insulating sheath will age due to high-intensity electric fields and the effects of light, heat, rain, and pollution in the environment, resulting in a decrease in the hydrophobicity of the outer insulating sheath of power station equipment. , Shed discoloration, hardening and brittleness, pulverization, cracking, tracking or electrical corrosion, end seal failure, etc., seriously affect the safe operation of power station equipment

Method used

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Embodiment

[0045] A liquid silicone rubber aging evaluation method for power station equipment is used to evaluate the aging state of the liquid silicone rubber outer insulating sheath of power station equipment. The evaluation process includes the following steps:

[0046] Step 1: Use the water spray classification method to detect the surface hydrophobicity of liquid silicone rubber, and divide the hydrophobic state into seven grades, which are respectively expressed as HC1, HC2, HC3, HC4, HC5, HC6 and HC7, where HC1 corresponds to the best hydrophobicity , HC7 corresponds to the worst hydrophobicity, that is, complete hydrophilicity;

[0047] Step 2: Use a thickness gauge to measure the thickness of the powdered layer of the liquid silicone rubber;

[0048] Step 3: Use a gloss meter to measure the specular gloss of the liquid silicone rubber;

[0049] Step 4: Measure the tracking and corrosion resistance of liquid silicone rubber according to GB / T 6553;

[0050] Step 5: Measure the ...

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PUM

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Abstract

The invention discloses a liquid silicone rubber aging evaluation method for power station equipment, which is used for judging the aging performance of the liquid silicone rubber outer insulating sheath of the power station equipment, including measuring the hydrophobicity of the liquid silicone rubber and measuring the thickness of the pulverized layer , Specular gloss measurement, tracking and electrical erosion performance test, X-ray photoelectron spectroscopy analysis and X-ray diffraction analysis, and the above measurement results are combined to judge the aging state of liquid silicone rubber. The evaluation method of the present invention has a novel detection method, intuitive detection results, and is easy to be grasped by power station maintenance personnel. It can accurately judge the aging state of liquid silicone rubber used in power station equipment that has been in operation for many years, and evaluate the outer insulating sheath of power station equipment. Whether it can persist in operation, repair or replacement effectively promotes the safe and stable operation of the power system.

Description

technical field [0001] The invention relates to the field of repair and maintenance of power station equipment, in particular to a liquid silicone rubber aging evaluation method for power station equipment. Background technique [0002] Liquid silicone rubber is a relatively high-grade silicone rubber developed since the 1970s. It is cross-linked by the addition reaction of vinyl siloxane and silicon hydrogen group. It has small molecular weight, low viscosity and easy processing. Molding can be vulcanized at room temperature, or can be accelerated by increasing the temperature. Compared with condensation silicone rubber, it also has the characteristics of deep vulcanization, no by-products, and small shrinkage. Liquid silicone rubber has low viscosity, good fluidity, fast vulcanization, and can be poured or injected. It has been widely used as the outer insulating sheath of composite insulators, transformers, wall bushings, DC voltage dividers, and lightning arresters. It ...

Claims

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Application Information

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IPC IPC(8): G01N33/44G01D21/02
CPCG01N33/44G01D21/02G01N33/445
Inventor 韦晓星陈灿贾志东刘婉莹卢文浩陈伟孙勇楚金伟
Owner EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
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