Abstract

Disclosed is a power module for actuating an operating element of a member, such as a valve to be closed and opened, by means of a ram (22) comprising a piston designed to move in a chamber (27) of the ram under the effect of a hydraulic fluid. A power module (2) comprises a hydraulic pump (18) pumping hydraulic fluid, an electric motor (41) driving the hydraulic pump, and at least one pipe (30) for the hydraulic fluid, bringing the hydraulic pump into communication with the chamber of the ram.

IPC Classes  ?

• F15B 15/18 - Combined units comprising both motor and pump
• F15B 15/06 - Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non-rectilinear movement
• F16K 31/163 - Operating meansReleasing devices actuated by fluid with a mechanism, other than pulling- or pushing-rod, between fluid motor and closure member the fluid acting on a piston

Abstract

A device for actuating a valve by means of a rack meshing with an elliptical pinion connected with a sleeve so that one transmits a torque to the other. The connections between the pinion and the rack as well as the sleeve are separable, so that the angular reference positions of the pinion relative to both the rack and the sleeve can be adapted according to a predefined variation in the torque required for actuating the valve.

IPC Classes  ?

• F16K 31/53 - Mechanical actuating means with toothed gearing
• F15B 15/06 - Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non-rectilinear movement
• F16K 31/54 - Mechanical actuating means with toothed gearing with pinion and rack
• F16K 31/163 - Operating meansReleasing devices actuated by fluid with a mechanism, other than pulling- or pushing-rod, between fluid motor and closure member the fluid acting on a piston
• F16H 19/04 - Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary motion and reciprocating motion comprising a rack
• F15B 21/00 - Common features of fluid actuator systemsFluid-pressure actuator systems or details thereof, not covered by any other group of this subclass

Abstract

The invention relates to a device for controlling a valve (3) via a rack (9) that engages with an elliptical pinion (11) connected to a coupling (13) so that one transmits a torque to the other. The connections between the pinion and both the rack and the coupling are separable, so that the angular reference positions of the pinion with respect to both the rack and the coupling can be adapted in accordance with a predefined torque variation necessary for controlling the valve.

IPC Classes  ?

• F16K 31/163 - Operating meansReleasing devices actuated by fluid with a mechanism, other than pulling- or pushing-rod, between fluid motor and closure member the fluid acting on a piston
• F15B 15/06 - Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non-rectilinear movement
• F16K 31/54 - Mechanical actuating means with toothed gearing with pinion and rack