Method for evaluating aging state of high-temperature vulcanized silicone rubber

A high-temperature vulcanization and aging state technology, which is applied to instruments, measuring devices, scientific instruments, etc., can solve problems such as the inability to understand changes in substance content, and achieve the effect of ensuring safe and stable operation

Active Publication Date: 2020-09-01
STATE GRID HUNAN ELECTRIC POWER +2
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Problems solved by technology

CN201610604578 uses infrared spectroscopy to detect the main chain and side chain groups of silicone rubber. This method further penetrates the detection object into the microscopic level of the material structure. It is a very meaningful exploration, but it is limited to the characteristics of the infrared spectrum itself and can only be roughly judged The change of the group cannot understand the change of the content of the substance during the aging process, and it has certain limitations in quantitative analysis

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  • Method for evaluating aging state of high-temperature vulcanized silicone rubber
  • Method for evaluating aging state of high-temperature vulcanized silicone rubber

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Embodiment 1

[0032] In this example, the aging state evaluation method of the high-temperature vulcanized silicone rubber composite insulator (110kV AC rod-type suspension composite insulator) includes the following steps:

[0033] (1) Cut 1cm from unaged and UV-aged composite insulators for 300 hours respectively 2 left and right samples;

[0034] (2) Soak the sample in ethanol for 6 hours to remove polar impurities on the surface of the composite insulator;

[0035] (3) air-dried naturally;

[0036] (4) Use a time-of-flight secondary ion mass spectrometer to detect the surface of the sample;

[0037] (5) Analyze the positive ion spectrum and calculate the SiCH of m / z=43 3 + SiC with m / z=73 3 h 9 + The peak height ratio of the unaged sample is 0.17, and the ratio of the UV aging sample for 300 hours is 0.25.

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Abstract

The invention discloses a method for evaluating the aging state of high-temperature vulcanized silicone rubber. According to the method, the aging state is evaluated by taking a mass spectrum peak height ratio of SiCH <3+> to SiC3H9 <+> as an aging judgment basis. Time-of-flight secondary ion mass spectrometry detection and quantitative analysis are carried out on a characteristic product in a silicone rubber aging process, so that the service life state of the material is accurately judged. A power grid company can judge whether a composite insulator needs to be replaced or not by adopting the diagnosis method, thereby ensuring safe and stable operation of a power grid.

Description

technical field [0001] The invention relates to a method for evaluating the aging state of a composite insulator, in particular to a method for evaluating the aging state of a high-temperature vulcanized silicone rubber composite insulator. Background technique [0002] The insulators used in the early power industry were made of ceramic or glass. In the 1980s, my country began to develop composite insulators. Due to its excellent pollution flashover resistance, it has been widely used in most heavily polluted areas and many new transmission lines. According to statistics, the amount of composite insulators used in China's grid-connected operation has accumulated more than 7 million pieces (as of 2014, voltage levels of 110kV and above), accounting for the total number of composite insulators in operation in the world (as of 2013, composite insulators of voltage levels of 50kV and above The number has exceeded 20 million) with a large proportion, and it is currently the coun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62
CPCG01N27/62
Inventor 万涛查方林巢亚峰李文波刘凯徐松王峰黄福勇黄颖胡胜吴晓文
Owner STATE GRID HUNAN ELECTRIC POWER
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