Method for judging compatibility of heptafluoroisobutyronitrile and ethylene propylene diene monomer material
A technology of EPDM rubber and heptafluoroisobutyronitrile, which is applied in the direction of material separation, analysis materials, instruments, etc., can solve the problems of lack of unified test standards for the compatibility of gas and EPDM rubber materials, and achieve simple operation and detection The effect of accurate data
Inactive Publication Date: 2021-03-30
WUHAN UNIV +1
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[0006] In view of this, the present invention proposes a method for judging the compatibility of heptafluoroisobutyronitrile and EPDM materials, aiming to solve C in the prior art 4 f 7 The compatibility of N gas and EPDM rubber material lacks a unified test standard
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[0023] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0024] refer to figure 1 , the method for judging the compatibility of heptafluoroisobutyronitrile and EPDM material in the embodiment of the present inventi...
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The invention provides a method for judging the compatibility of heptafluoroisobutyronitrile and an ethylene propylene diene monomer material, which comprises the following steps: sealing electrical equipment using the ethylene propylene diene monomer material as a sealing material, vacuumizing, and introducing heptafluoroisobutyronitrile gas until the absolute pressure in the electrical equipmentis within a preset range; placing the electrical equipment under a preset environment condition, the preset environment condition being the same as the actual operation condition of the electrical equipment, and collecting product gas in the electrical equipment after a first preset duration; or carrying out a thermal acceleration test on the ethylene propylene diene monomer material and the heptafluoroisobutyronitrile gas in the electrical equipment for a second preset duration, and collecting a product gas in the electrical equipment after the test is finished; detecting the product gas todetermine whether characteristic gas hexafluoropropylene is generated or not. The method is simple to operate, is not interfered by factors such as humidity, temperature, electric field and the like,is accurate in detection data, and definitely provides evaluation indexes of material compatibility.
Description
technical field [0001] The invention relates to the technical field of electrical equipment insulation, in particular to a method for judging the compatibility of heptafluoroisobutyronitrile and EPDM materials. Background technique [0002] Sulfur hexafluoride (SF 6 ) is widely used in gas-insulated equipment because of its colorless, odorless, non-toxic, stable chemical properties, high compressive strength, and excellent arc extinguishing performance. However SF 6 The GWP (Global Warming Potential) of CO is about 2 23,500 times that of SF, and the atmospheric lifetime is 3,200 years. As a greenhouse gas, its impact on the environment cannot be underestimated. Therefore, it is urgent to find alternative SF 6 environmentally friendly insulating gas. In 2015, 3M Company of the United States launched the environmentally friendly insulating gas heptafluoroisobutyronitrile (C 4 f 7 N) gas, its chemical properties are stable, and its insulation performance reaches SF 6 2.7...
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Login to View More IPC IPC(8): G01N30/02G01N30/06G01N30/68G01R31/12
CPCG01N30/02G01N30/06G01N30/68G01R31/1263G01N2030/025G01N2030/062
Inventor 李涵袁瑞君郑哲宇周文俊喻剑辉刘伟
Owner WUHAN UNIV