METHOD FOR PASSPORTIZATION OF SAFETY AND CONTROL VALVES WITH ELASTIC ELEMENTS (SPRINGS) Russian patent published in 2021 - IPC G01M3/08 G01H3/00 

FIELD: experimental equipment.

SUBSTANCE: invention relates to experimental equipment and can be used to determine the inertial, dissipative and elastic characteristics of technical objects with movable spring-loaded elements like safety or control valves of pneumatic and hydraulic lines. The essence of the invention: the required characteristics for a valve passport with elastic elements in the form of coil springs are determined by the results of static and dynamic valve calibration. During static calibration, forces are applied to the shank of the valve stem outside the valve body, which cause deformation of the spring, and the amount of deformation of the valve spring, according to Hooke's law, will be proportional to the applied force, and the coefficient of proportionality itself is the reduced stiffness (reduced coefficient of elasticity). Dynamic calibration of the valve consists in the implementation of a damped oscillatory process for a moving valve assembly by impulse action on the stem shank, and the characteristics of the oscillatory damped process make it possible to determine the inertial, dissipative and elastic characteristics of the valve, as its passport characteristics, and the movements of the moving part of the valve are determined in a non-contact way, namely by an optical method.

EFFECT: determination of the reduced inertial, dissipative and elastic characteristics of the moving valve assemblies with elastic elements in the form of coiled cylindrical springs both in the factory when the valve is certified and in the field environment, when, as a result of the valve operation, its factory passport characteristics change.

1 cl, 3 dwg