Stretching stress testing machine used in high-temperature and high-pressure hydrogen environment

Abstract

The invention discloses a stretching stress testing machine used in a high-temperature and high-pressure hydrogen environment. The stretching stress testing machine used in the high-temperature and high-pressure hydrogen environment comprises a safety room, a stretcher, a high-temperature autoclave system and a gas supply and exhaust system, wherein the safety room comprises an airtight safety isolation room; a gas inlet and a gas exhaust port are formed in the safety isolation room; a carbon dioxide gas cylinder group is connected with the gas inlet of the safety isolation room; the high-temperature autoclave system is arranged in the safety isolation room and comprises a high-temperature autoclave placed in a heating furnace; a stretching rod inlet, a nitrogen inlet, a hydrogen inlet and a gas exhaust port are formed in the high-temperature autoclave; the gas supply and exhaust system comprises a nitrogen inlet pipeline, a hydrogen inlet pipeline, a gas exhaust pipeline and a safety pipeline. Through the safety isolation room and a flame arrester and by a high-temperature thermal starting and stopping experiment process, the circumstance that high-temperature hydrogen leaks and is in contact with air is prevented, and the possible circumstance of serious hydrogen embrittlement of an autoclave body material in a normal and low temperature region at the temperature of 220 DEG C or below is avoided, so that the purposes of accurate testing, safe testing, operation convenience and long service life of equipment are achieved.

Description

technical field [0001] The invention belongs to the technical field of hydrogen equipment detection, and relates to a tensile stress testing machine in a high-temperature and high-pressure hydrogen environment. Background technique [0002] The field of petrochemical hydrofining involves materials serving in high-pressure, high-temperature and hydrogen-facing environments, such as hydrogenation reactors in refineries. Under high temperature, high pressure and hydrogen environment, hydrogen atoms are easy to penetrate into steel, causing hydrogen embrittlement, hydrogen bubbling and other failures. Testing the anti-hydrogen embrittlement performance of materials under high pressure, high temperature and hydrogen environment is of great significance to the design and manufacture of hydrogen equipment in the petrochemical industry. At present, the main method of testing the hydrogen embrittlement performance is to put the sample in a closed environment box to charge hydrogen, ...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that after the sample is taken out of the environmental chamber, hydrogen precipitation will occur, which is different from the service conditions of the material, resulting in inaccurate hydrogen embrittlement performance test results

[0004] 1) The Chinese patent application number 201410401253.X discloses a high-pressure hydrogen embrittlement structure test device and test method, but it cannot perform tensile tests in a high-temperature hydrogen environment, and there are no safety measures for high-temperature hydrogen tests, and hydrogen cannot be heated

[0005] 2) The Chinese patent application number 201320188124.2 discloses a device for material performance testing in a high-temperature pressurized hydrogen environment. However, it is not equipped with a safety isolation room or hydrogen isolation measures, and cannot prevent the leaking high-temperature hydrogen from contacting the air. ,There are security risks

[0006] 3) The Chinese patent application number 201110259252.2 discloses a testing machine for testing the durab...

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