AUTOMATIC CONTROL METHOD AND SYSTEM OF REGULATING VALVE Russian patent published in 2013 - IPC G05D16/00 G05D7/00 F16K3/00 

FIELD: machine building.

SUBSTANCE: automatic control system of a regulating valve includes a control object that consists of regulating valve 1 with trim 2, which is connected to electric actuator 3. Regulating valve 1 is equipped with trim position sensor 4. At regulating valve inlet 1 inlet there installed is pressure sensor 5, and at the outlet there installed is pressure sensor 6. At the system outlet there located is flow metre 7 with converging device 8, the inlet of which is connected to pressure drop senor 9 and temperature sensor 10. The system consists of calculating device 11 with input converters 12, 13, 14 and 15 and output converters 16 and 17. Input converter 12 connects pressure sensor 5 at the inlet of regulating valve 1 to calculating device 11, and input converter 13 connects pressure sensor 6 at the outlet of regulating valve 1. Input converter 14 connects flow metre 7 to calculating device 11, and input converter 15 connects trim position sensor 4 to calculating device 11. Output converters 16 and 17 connect calculating device 11 to electric actuator 3 to control trim 2 position.

EFFECT: simplifying the system design and improving its reliability and service life at control of gas pressure at the outlet of the regulating valve, which is specified in wider ranges of values providing operability of the next equipment in optimum mode considering gas flow rate.

1 dwg