Performance identification test method for high-reliability rubber expansion joint

A rubber expansion and identification test technology, which is applied in the field of rubber expansion joints, can solve the problems of not being localized, single test methods, and large deviations, and achieve the effects of saving test time, improving safety performance, and improving work efficiency

Inactive Publication Date: 2020-08-21
JINGJIANG YONGHE POLYMOLECULAR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Performance identification test method for high-reliability rubber expansion joint

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0056] Embodiment 1 is Step 8: In the embodiment of dynamic displacement test, keep the initial positions of the main hydraulic ejector rod 92 for axial displacement, the auxiliary balance hydraulic ejector rod 93 for axial displacement and the hydraulic ejector rod 99 for angular displacement fixed, and set the diameter To the test radial displacement (actual maximum radial displacement) of displacement hydraulic mandrel a95 and (or) radial displacement hydraulic mandrel b96, fill the test rubber expansion joint with 110°C test water and keep the test pressure at The test pressure is 1.5 times the design pressure, set the test movement frequency and the number of fatigue tests (200,000 times in the embodiment), and you can choose the radial displacement hydraulic ejector rod a95 and (or) the radial displacement hydraulic ejector rod b96 at the same time Radial displacement action test, or only test in one direction;

Embodiment approach 2

[0057] The second implementation mode is step 9: the implementation mode of the seismic test, using the "single frequency sweep output" test mode, setting the single motion frequency and the number of motions to be tested, and setting the radial displacement to be tested (maximum design radial displacement amount), click "Start" to enter the single-frequency automatic test mode.

[0058] Step 7, simulated working condition test

[0059] Put the two ends of the test rubber expansion joint 14 respectively and the test blocking plate 13 through the screw holes with bolts, insert gaskets and nuts, and tighten them symmetrically and sequentially to ensure that the sealing surface does not leak. When assembling, ensure that the bottom plane of the test blocking plate 13 is at In the same plane, set the installed one-end test blocking plate 13 on the test platform 71 with fixing bolts, insert the two ends of the limit pull rod 4 into the limit pull rod nut and the limit pull rod gasket...

specific Embodiment approach

[0085] The anti-pressure test is a verification test for the integrity of the compression resistance before blasting of the qualified test rubber expansion joint that has completed all the above-mentioned superimposed test items and remains intact; the specific implementation method is as follows:

[0086] Adopt step 7: Simulate the installation and connection method of the working condition test, keep the axial tension to the displacement required by the test (the maximum design axial elongation displacement) and use the limit rod to limit and fix the position; add the test rubber expansion joint inside Note the test medium that meets the test requirement temperature (the embodiment is usually the test temperature of 110°C), and keep the temperature constant, adjust the frequency conversion booster pump 75 and the test medium outlet valve so that the test medium pressure inside the test rubber expansion joint is 1 times the design. Under pressure, run the test at constant pres...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/12G01N3/24G01N3/303G01N3/313G01T1/02G01N17/00G01B21/02
CPCG01B21/02G01N3/12G01N3/24G01N3/303G01N3/313G01N17/00G01N2203/0025G01N2203/0046G01N2203/0048G01N2203/0073G01T1/02
Inventor 方燚钟浩明刘彬范志平瞿波
Owner JINGJIANG YONGHE POLYMOLECULAR TECH
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