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US 2020/0362976 A1Published application
Systems and methods for torque isolation valve actuator
AssigneeTapcoEnpro, LLC
InventorsKenneth Krause, Benjamin Bailey
Life of this patent
Estimating the term…
Abstract
A low-volume non-rising stem gate valve comprising a hollow stem, planetary roller screw and anti-rotation rods. The anti-rotation rods isolate the torque force and maintain the alignment of the planetary roller screw with the stem and the screw shaft, thus reducing the amount of material necessary to support ordinary operational forces.
Claims20
A torque isolating valve actuator comprising:
- an actuator housing;
- a nut housing disposed within the actuator having an actuator end and a stem end with guide channels positioned on the outside of the nut housing;
- rollers within the nut housing;
- a screw shaft aligned axially through the rollers in the nut housing wherein the nut housing is configured to move along the screw shaft;
- rods disposed parallel the screw shaft within the actuator housing and connected to the actuator housing and positioned outside the nut housing and passing through the guide channels wherein the guide channels and rods are configured to prevent the nut housing from rotating as the actuator actuates;
- and
- a non-rising hollow stem coupled to the stem end of the nut housing configured to pass the screw shaft as the nut housing moves along the screw shaft and wherein the nut housing and rods are configured to shield the stem from the transfer of a torque force caused by the rotation of the planetary roller screw.
4 more elements
A non-rising stem actuator valve comprising:
- an actuator housing comprising a plurality of anti-rotation rods disposed within the housing;
- a screw shaft fixed on a first end of the actuator housing and extending axially along the interior of the housing and parallel the anti-rotation rods;
- a nut housing comprising a planetary roller screw disposed within the actuator housing comprising a stem end and an actuator on an actuator-end of the housing, wherein the roller screws engage the screw shaft;
- a stem extending from the stem end of the nut housing wherein the stem is hollow and configured to pass the screw shaft through the hollow stem;
- an upper bonnet connected to the actuator housing and configured to contain a steam at pressure and through which the stem passes;
- a gate having an aperture therein connected to the stem;
- a valve opening having a first flange and a second flange wherein the gate crosses the opening when the gate aperture aligns with the opening;
- and
- a lower bonnet configured to hold steam pressure wherein the gate aperture is placed when the valve is closed.
6 more elements
The nut housing of claim 112 further comprising an actuator disposed on the actuator end of the nut housing.
Dependencies are inferred from the claim text.