Abstract
Safety valves are widely used as the safety device in pressure systems, such as boilers and pressure pipes, to ensure the safe operation of pressure systems. At present, the inspection of safety valves is mainly carried out by manual operation or semi-automatic operation, and it requires a lot of manpower operation costs. Moreover, the measurement of different pressure ranges is performed using only a single pressure sensor such that the test precision is insufficient. In this study, a high-precision safety valve test architecture with three testing channels was proposed, and an automated testing system was developed. In this system, the user can define the test specifications through parameter setting. The system can automatically execute the complete test control process and judge whether the test was passed based on the measured data. In this article, for the low, middle, and high test pressures, the safety valves of four different states were tested respectively and the test reports were automatically generated. Finally, it statistically analyzed the test results for the diagnosis of the safety valve failure. Therefore, the results of this research may effectively solve the problems of current safety valve testing and improve its operational efficiency and test quality.
Highlights
IntroductionWith industrial development and advance of science and technology, many industries (such as gasoline, natural gas, and power generation) are provided with different pressure equipments[1,2,3] such as boilers and pressure vessels
With industrial development and advance of science and technology, many industries are provided with different pressure equipments[1,2,3] such as boilers and pressure vessels
This study developed the automatic monitoring software for this safety valve testing system with the LabVIEW graphical language.[19,20,21]
Summary
With industrial development and advance of science and technology, many industries (such as gasoline, natural gas, and power generation) are provided with different pressure equipments[1,2,3] such as boilers and pressure vessels. The safety valve is turned off or on automatically by increasing or reducing the gas-applied force and the loading-mechanism-applied force on the flap, so as to prevent equipment overpressure. When it reaches the pressure of the fully open state (i.e. the spur pressure PS), there may be maximum discharge gas. The functions of each component are described as follows: 1. Safety valve test bench: It is a universal safety valve test platform that can fix the tested safety valve through the hydraulic control module and supply the gas pressure required for testing
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