Flow-rate control valve actuator
AssigneeKoganei Corporation
InventorRyoji Kanai
Life of this patent
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Abstract
A flow-rate control valve 10a includes: a housing including a valve body configured to regulate an opening degree of a flow channel to be reciprocable, formed therein; a driving force transmission mechanism 31 provided in the housing and including a valve driving shaft driving a valve body, a hollow screw shaft 40 screwed to the valve driving shaft and a rotator 36 configured to rotate the hollow screw shaft 40; and a drive mechanism 53 including actuators 54 and 55 with a piston 61 embedded therein, the piston 61 is provided with a lever 66 engaged with engaging sections provided on the rotator 36, and the rotator 36 is rotated to a constant angle through the lever 66 by reciprocation of the piston 61 to regulate the opening degree of the flow channel by the valve body.
Claims18
A flow-rate control valve comprising:
- a flow channel block including a flow channel configured to guide a fluid, formed therein;
- a housing provided in the flow channel block and provided with a valve assembly to be reciprocable, the valve assembly including a valve body configured to regulate an opening degree of the flow channel;
- a driving force transmission mechanism provided in the housing and including an adjusting screw member rotatably provided and configured to adjust a position of the valve body by rotation, a rotator configured to rotate the adjusting screw member, and a pressing section provided on the rotator;
- a drive mechanism including an actuator with a reciprocating member embedded therein and provided in the driving force transmission mechanism;
- a lever swingably mounted on the reciprocating member and provided with a first contact section in contact with the pressing section when the reciprocating member moves forward and a second contact section in contact with the pressing section when the reciprocating member moves backward;
- and
- a swing regulating section provided in the reciprocating member and configured to regulate swing of the lever at least when the first contact section is in contact with the pressing section,
- wherein the rotator is rotated to a constant angle by reciprocation of the reciprocating member to regulate the opening degree of the flow channel by using the valve body.
Dependencies are inferred from the claim text.