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US 2019/0195385 A1Published application
Three-position valve and pneumatic actuator therefor
AssigneeHoneywell International Inc.
InventorRobert Franconi
Life of this patent
Estimating the term…
Abstract
A valve actuator for moving a valve element includes an actuator body, an opening piston, a closing piston, a first lost-motion link, and a second lost-motion link. The actuator body has an inner surface, a vent opening, a full-open pneumatic passageway, and a full-closed pneumatic passageway. The opening piston is movably disposed within the piston chamber between the vent opening and the full-open pneumatic passageway. The closing piston is movably disposed within the piston chamber between vent opening and the full-closed pneumatic passageway. The first lost-motion link is coupled to the opening piston and is operable to selectively rotate the valve element. The second lost-motion link is coupled to the closing piston and is operable to selectively rotate the valve element.
Claims20
A valve, comprising:
- a valve body including an inlet, an outlet, and a flow passage extending between the inlet and the outlet;
- a valve element rotationally mounted on the valve body and disposed within the flow passage, the valve element rotatable between (i) a preset partial-open position, in which fluid is allowed to flow through the flow passage at a first flow rate, (ii) a full-open position, in which fluid is allowed to flow through the flow passage at a second flow rate that is greater than the first flow rate, and (iii) a full-closed position in which fluid is at least substantially restricted from flowing through the flow passage;
- and
- an actuator coupled to the valve element, the actuator configured to selectively receive a pneumatic actuation force and to (i) move the valve element to the preset partial-open position when the pneumatic actuation force is not being received, and (ii) move the valve element to one of the full-open position or the full-closed position when the pneumatic actuation force is being received, the actuator comprising:
- an actuator body having an inner surface, a vent opening, a full-open pneumatic passageway, and a full-closed pneumatic passageway, the inner surface defining a piston chamber, the vent opening extending through the actuator body from a first position in the piston chamber, the full-open pneumatic passageway extending through the actuator body from a second position in the piston chamber and configured to selectively receive the pneumatic actuation force, the full-closed pneumatic passageway extending through the actuator body from a third position in the piston chamber and configured to selectively receive the pneumatic actuation force;
- an opening piston movably disposed within the piston chamber between the vent opening and the full-open pneumatic passageway;
- a closing piston movably disposed within the piston chamber between vent opening and the full-closed pneumatic passageway;
- a first lost-motion link coupled to the opening piston and operable to selectively rotate the valve element;
- and
- a second lost-motion link coupled to the closing piston and operable to selectively rotate the valve element.
7 more elements
A valve actuator for moving a valve element, comprising:
- an actuator body having an inner surface, a vent opening, a full-open pneumatic passageway, and a full-closed pneumatic passageway, the inner surface defining a piston chamber, the vent opening extending through the actuator body from a first position in the piston chamber, the full-open pneumatic passageway extending through the actuator body from a second position in the piston chamber and configured to selectively receive the pneumatic actuation force, the full-closed pneumatic passageway extending through the actuator body from a third position in the piston chamber and configured to selectively receive the pneumatic actuation force;
- an opening piston movably disposed within the piston chamber between the vent opening and the full-open pneumatic passageway;
- a closing piston movably disposed within the piston chamber between the vent opening and the full-closed pneumatic passageway;
- a first lost-motion link coupled to the opening piston and configured to be coupled to the valve element;
- and
- a second lost-motion link coupled to the closing piston and configured to be coupled to the valve element.
3 more elements
A valve actuator for moving a valve element, comprising:
- an actuator body having an inner surface, a vent opening, a full-open pneumatic passageway, and a full-closed pneumatic passageway, the inner surface defining a piston chamber, the vent opening extending through the actuator body from a first position in the piston chamber, the full-open pneumatic passageway extending through the actuator body from a second position in the piston chamber and configured to selectively receive the pneumatic actuation force, the full-closed pneumatic passageway extending through the actuator body from a third position in the piston chamber and configured to selectively receive the pneumatic actuation force;
- an opening piston movably disposed within the piston chamber between the vent opening and the full-open pneumatic passageway;
- an opening piston stop extending through the actuator body and engaging the opening piston when the full-open pneumatic passageway is not receiving the pneumatic actuation force, the opening piston stop adjustable relative to the opening piston;
- a closing piston movably disposed within the piston chamber between the vent opening and the full-closed pneumatic passageway;
- a closing piston stop extending through the actuator body and engaging the closing piston when the full-closed pneumatic passageway is not receiving the pneumatic actuation force, the closing piston stop adjustable relative to the closing piston;
- a first lost-motion link coupled to the opening piston and configured to be coupled to the valve element;
- and
- a second lost-motion link coupled to the closing piston and configured to be coupled to the valve element,
- wherein:
- the opening piston is moveable between an opening piston first position and an opening piston second position, the opening piston in the opening piston first position when the full-open pneumatic passageway is not receiving the pneumatic actuation force, and the opening piston in the opening piston second position when the full-open pneumatic passageway is receiving the pneumatic actuation force;
- and
- the closing piston is moveable between a closing piston first position and a closing piston second position, the closing piston in the closing piston first position when the full-closed pneumatic passageway is not receiving the pneumatic actuation force, and the closing piston in the closing piston second position when the full-closed pneumatic passageway is receiving the pneumatic actuation force.
9 more elements
Dependencies are inferred from the claim text.