Primary Research of Safety Valve Online Testing Technology

A simplified safety valve simulation model is established on basis of a widely used safety valve in engineering-spring directly loading safety valve, and the relationship between the mechanic parameter of spring surface and loading is discussed according to the result of simulation analysis. The relationship of strain varying rate in spring measuring point and setting pressure varying rate of safety valve is achieved, it can be used as a online fault diagnosis criteria when setting pressure changes in working course. Furthermore, an online testing technology of safety valve is proposed. Through experiment research using traditional electric strain sensor, the relationship between measured parameters of the specific parts in the safety-valve and the experimental loading is achieved, and the online testing method is proved to be very workable.