Turbine valve quick-closing state test system and analysis method

The invention discloses a testing system and an analysis method for the quick closing state of a steam turbine valve. The testing system mainly comprises a first pressure sensor, a second pressure sensor, a linear displacement sensor, a data acquisition unit and a data storage and analysis unit. Through a steam turbine valve quick-closing state analysis algorithm built in the data storage and analysis unit, a valve stroke curve, a buffer cavity hydraulic oil pressure curve and an oil return pipeline hydraulic oil pressure curve during quick closing of the valve can be combined to carry out stress analysis on the valve; comparing the curve difference of the valve in the normal state and the abnormal state to evaluate the deterioration condition of the quick-closing state of the valve, and analyzing the cause of the deterioration of the quick-closing state of the valve; according to the method, whether the quick-closing state of the valve is degraded or not can be judged, deep analysis can be performed on the r