Safety valve low temperature test system and safety valve low temperature test method

Abstract

The invention discloses a low-temperature test system for a safety valve. The system is composed of a liquid nitrogen supply assembly, a nitrogen supply assembly, a test medium supply assembly, a test assembly and a test safety valve. The liquid nitrogen supply assembly and the nitrogen supply assembly provides liquid nitrogen and nitrogen for the test medium supply assembly respectively; and the liquid nitrogen and nitrogen in the test medium supply assembly forms test media. The test medium supply assembly provides test media for a tested safety valve and thus the test media with the temperatures and pressures needed by testing of the tested safety valve are provided by controlling supply quantities of the liquid nitrogen and nitrogen, and then the test assembly caries out testing on the tested safety valve. In addition, the invention also discloses a low-temperature test method for a safety valve. A safety valve can be tested by using the low-temperature test system. According to the technical scheme, the starting performance testing, set pressure value adjustment, and sealing performance testing of the tested safety valve can be carried out under different pressure and temperature conditions.

Description

technical field [0001] The invention relates to the field of equipment testing, in particular to a safety valve low-temperature test system and a safety valve low-temperature test method. Background technique [0002] The safety valve is an automatic valve, which uses the force of the medium itself to discharge a certain amount of fluid without any external force, so as to prevent the pressure from exceeding the rated safety value. When the pressure returns to normal, the valve closes again and prevents the medium from continuing to flow out . As the most important safety accessory on pressure-bearing special equipment, whether the safety valve can be opened accurately, reseat in time, and whether it can maintain a reliable seal after resealing will directly affect whether the pressure-bearing special equipment can maintain safety and energy saving . [0003] In order to ensure the accurate opening performance and reliable sealing performance of the safety valve, TSG ZF001...

AI Technical Summary

Problems solved by technology

Using this method, it is passive to some extent, and cannot actively and effectively generate low-temperature media with different pressures and temperatures required

It cannot meet the test requirements of valves for different materials and different cryogenic gases

[0012] (2) With this self-evaporating method, it is difficult to guarantee the stability of the pressure and temperature of the test medium, and the temperature error is large

[0013] (3) There is no temperature measuring device installed in the whole test system, so the temperature of the test medium cannot be obtained

[0025] The safety valve low temperature test system recommended in the current regulations and standards cannot accurately control the pressure and temperature of the test medium due to the flaws in the system design, and cannot fully meet the low temperature test requirements of low temperature medium safety valves under different working media, working temperature and working pressure. , therefore, it is not practical to

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