Valve positioner and valve structure

The invention provides a valve positioner and a valve structure, the positioner comprises a control module, a valve position sensor, a pressure sensor and a stroke/pressure correlation module, the valve position sensor is used for detecting the valve position of a valve body and transmitting the val...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	LI YURONG, FAN SUI, LI JIANQIU, BAO WEIHUA, FENG SUMEI, ZHAO HENG, WANG HUAN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ACTUATING-FLOATS BLASTING COCKS DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR DEVICES FOR VENTING OR AERATING ENGINEERING ELEMENTS AND UNITS FLUID-PRESSURE ACTUATORS FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING HYDRAULICS OR PNEUMATICS IN GENERAL LIGHTING MECHANICAL ENGINEERING SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL TAPS THERMAL INSULATION IN GENERAL VALVES WEAPONS
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Beschreibung
Zusammenfassung:	The invention provides a valve positioner and a valve structure, the positioner comprises a control module, a valve position sensor, a pressure sensor and a stroke/pressure correlation module, the valve position sensor is used for detecting the valve position of a valve body and transmitting the valve position to the control module, and the control module is used for controlling the stroke/pressure correlation module according to a valve position set value and the deviation of the valve position. The valve position control signal is converted into a pneumatic signal and is transmitted to a pneumatic executing mechanism, so that the pneumatic executing mechanism controls the opening degree of the valve according to the pneumatic signal; the pressure sensor is used for detecting the pressure output by the pneumatic executing mechanism and transmitting the pressure to the stroke/pressure correlation module, and the stroke/pressure correlation module converts the pressure value transmitted by the pressure sensor