Performance identification test method for high-reliability rubber expansion joint

Abstract

The invention discloses a performance identification test method for a high-reliability rubber expansion joint. The method is characterized in that the rubber expansion joint is subjected to the following tests in sequence: a water pressure test, a vacuum test, a gamma ray irradiation dose test, a hot air accelerated aging test, a water hammer pulse impact fatigue test, a shear fatigue test, a simulated working condition test, a static displacement or dynamic displacement test, an anti-seismic test, a compression resistance test and a bursting test; the water pressure test, the vacuum test andthe water hammer pulse impact fatigue test use the same set of tools. The method has the advantages that by adopting the test sequence, the test time can be effectively saved, the test working efficiency is improved, and the labor intensity of workers is reduced; the rubber expansion joint passing through the test project is more stable in quality and higher in reliability; and meanwhile, the safety performance of the expansion joint in the using process is improved.

Description

technical field [0001] The invention relates to the field of rubber expansion joints, in particular to a performance appraisal test method for high-reliability rubber expansion joints. Background technique [0002] Rubber expansion joints are widely used in all walks of life as an elastic connection pipeline running element that absorbs vibration and noise, reduces system stress, and compensates for system displacement in all directions. In the existing standard system, such as the national standard GB / T26121 "Flexible Rubber Joint", the former industry standard HG / T2289 "Flexible Rubber Joint" of the Ministry of Chemical Industry, and the industry standard CJ / T208 "Flexible Rubber Joint" of the Ministry of Construction Joints", and other international standards, such as the American Fluid Association FSA piping system non-metallic expansion joints, ASTM F1123-1987 (2010) standard specifications for non-metallic expansion joints, etc., only apply to hydraulic tests, vacuum t...

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Problems solved by technology

In the existing standard system, such as the national standard GB / T26121 "Flexible Rubber Joint", the former industry standard HG / T2289 "Flexible Rubber Joint" of the Ministry of Chemical Industry, and the industry standard CJ / T208 "Flexible Rubber Joint" of the Ministry of Construction Joints", and other international standards, such as the American Fluid Association FSA piping system non-metallic expansion joints, ASTM F1123-1987 (2010) standard specifications for non-metallic expansion joints, etc., only apply to hydraulic tests, vacuum tests, displacement performance tests, The four test items of the burst pressure test are clearly stipulated, and only a relatively simple verification or type test is carried out on the spherical compressive strength and displacement compensation performance of the rubber expansion joint. The test condition is usually room temperature living water, and the test method is relatively simple. , which is quite different from the actual operating conditions, the verification effect is very small, the deviation between the design and the actual use effect is large, the quality of engineering products is discrete, and the safety and reliability of operation cannot be guaranteed.

[0003] Therefore, in many important applications, such as nuclear power plant nuclear island and its key areas, marine engineering fields such as submarines and aircraft carriers, large-scale chemical industry, medicine, marine transportation and delivery fields and other fields with high safety and reliability, there are currently no The strange phenomenon of localization or dare not localization, with the increasing of China's industrialization category and manufacturing capacity, in these fields, because we have no practical experience in engineering application, we cannot participate in the competition of imported rubber expansion joints, so we invented a kind of identification The test method can simulate the working conditions of the field, and through the superposition test of various types of test methods such as accelerated fatigue, aging, impact, dynamic motion, etc. in the laboratory, the use verification and design verification of the working conditions can be achieved, and convincing customers can be provided. evidence, thereby being able to shorten the localization process of high-reliability rubber expansion joints

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