JP2009138933A5 - - Google Patents

Claims (2)

A flow rate control device for controlling a flow rate discharged from a fluid containment vessel provided with an on-off valve,
A rotary actuator;
A rotation angle detection unit for generating a signal based on the rotation angle of the rotation shaft of the rotary actuator;
A drive gear that is axially coupled to the rotation shaft of the rotary actuator, and a gear box that includes a driven gear that is gear-coupled to the drive gear;
A valve opening and closing arm that is axially coupled to the center of the driven gear and rotates, and is detachably coupled to an opening and closing valve knob of the opening and closing valve of the fluid storage container;
A sensing signal based on the amount of fluid remaining in the fluid storage container is received to calculate a reference rotation angle, a signal of the rotation angle detection unit is input to detect an actual rotation angle, and the reference rotation angle and the actual rotation angle are detected. A control unit that drives the rotary actuator to correct the error of
A sensing center for sensing the weight of the containment vessel and the pressure of the fluid according to the amount of fluid remaining in the fluid containment vessel, and transferring the sensing signal to the control unit;
And a rotation angle display unit provided at a lower portion of the gear box and connected to the driven gear and having a scale indicating a rotation angle on an outer peripheral surface thereof. The rotation angle detection unit is provided on the rotation actuator,
A plurality of fan-shaped plate-like contact members arranged with a predetermined angle around the rotation axis of the rotary actuator; and
The flow control device according to claim 1, further comprising a plurality of limit switches that transfer a signal based on a rotation angle to the control unit when contacting each of the plate-like contact members.