Calibration apparatus and method for ultra-high pressure safety valve

Abstract

The invention relates to an ultra-high pressure safety-valve test apparatus and a corresponding test method. The apparatus adopts a U-shaped bolt to fix the ultra-high pressure safety-valve on a work platform and the output flange of the ultra-high pressure safety-valve is arranged upward; an ultra-high pressure flange is connected with an ultra-high pressure tube and the ultra-high pressure safety-valve; an air-supply is compressed through an air bottle firstly by a compressor and secondly by an ultra-high pressure pump and then is charged into an accumulator; the purified water is injected into the valve cavity through the outlet flange of the ultra-high pressure safety-valve and the video monitor device is arranged well and the position is adjusted well; a safety shielding wall is adopted to separate the operation zone from the test apparatus zone; after all are ready, a back-up valve on a control table carries out the operations of pressure-rising and pressure-preserving step by step according to the set pressure percentage and sealing test pressure and the opening pressure and the sealing capability of the safety-valve are assessed according to the leakage rate of bubbles from the outlet. The ultra-high pressure safety-vale test apparatus is provided with simple structure, economical and practical capability, high operablity and sensitive and reliable testing performance and solves the actual problems in the ultra-high pressure safety-valve testing field of our country.

Description

technical field [0001] The present invention relates to a calibration device and a calibration method for an ultra-high pressure safety valve, specifically relates to a set pressure range of 100MPa to 350MPa, a safety valve inlet diameter of 10 to 100mm, and a medium of air, water vapor, water and other chemical substances. The calibration device and calibration method of the spring direct load ultra-high pressure safety valve on the pressure vessel, pressure pipeline and mechanical equipment. Background technique [0002] In recent years, with the rapid development of the national economy, the demand for petroleum and chemical raw materials has increased significantly, the petrochemical industry has developed rapidly, the scale of production equipment has become larger and larger, and the processing depth has continued to deepen. The petrochemical industry plays an important role in the national economy and is one of the important pillar industries of my country's economic ...

AI Technical Summary

Problems solved by technology

There will be four major problems in this operation: first, the cost is high, more spare valves need to be purchased, and the inspection price abroad is very expensive; second, the safety valve assembly is precise, the sealing surface requirements are high, and long-distance transportation may easily cause changes in the performance of the safety valve , which affects the safety of use and normal production; third, the inspection cycle is long when it is sent abroad, and it cannot meet the production needs in emergency situations; fourth, it is difficult to ensure that it is inspected at least once a year

In short, ultra-high pressure inspection technology and domestic non-related inspection technology affect the normal production of enterprises, and there are large safety hazards. It is necessary to carry out research on ultra-high pressure safety valve inspection devices and technologies

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