Practice and Analysis of Life Measuring Device for Motor Valve

Abstract:

Motor valve leakage is not easy to detect during using, so it must carry out quality inspection before assembly into gas meter. The quality appraisement of valve mainly relies on switch times before leakage, and pressure difference measurement is better method for leakage judgment. The static pressure leak detection method, reference gas chamber and control program of solenoid valve are key technologies in pressure difference measurement and life measurement. The new type device is designed with hardware and software, such as gas path and pipes, sensor, the solenoid valves of dynamic structure static switching unit, controller, gas pressure regulation system, automatic detection and valve switching process control program etc. Based on support of hardware and software, dynamic flow pipe is separated to static segments which are reference gas chamber and measuring air chambers; and the signal of chambers pressure difference and switch times without leakage are the output result. Switching frequency ratio of solenoid valves to motor valve is 1:5 or 1:10; lower ratio can prolong the service life of solenoid valves.

• Periodical: Applied Mechanics and Materials (Volumes 423-426)
• Pages: 1972-1977
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.423-426.1972
• Online since: September 2013
• Authors: Wen Jie Ding
• Keywords: Leakage, Motor Valve Life Test, Pressure Difference Measurement, Reference Gas Chamber, Switching Frequency Ratio

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