Actuator for a valve

The following invention relates to an actuator for controlling a valve (100) in a subsea installation, the valve having a spring (108) to return the valve to a failsafe condition upon loss of pressure. The actuator comprises an actuator module (10) that is exchangeably connected to the valve and com...

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Bibliographic Details
Main Author Magnus, Heyn Halfdan
Format Patent
LanguageEnglish
Published 06.08.2019
Subjects
ACTUATING-FLOATS
BLASTING
COCKS
DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
DEVICES FOR VENTING OR AERATING
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
ENGINEERING ELEMENTS AND UNITS
FIXED CONSTRUCTIONS
FLUID-PRESSURE ACTUATORS
FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
HYDRAULICS OR PNEUMATICS IN GENERAL
LIGHTING
MECHANICAL ENGINEERING
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL
TAPS
THERMAL INSULATION IN GENERAL
VALVES
WEAPONS
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Summary:The following invention relates to an actuator for controlling a valve (100) in a subsea installation, the valve having a spring (108) to return the valve to a failsafe condition upon loss of pressure. The actuator comprises an actuator module (10) that is exchangeably connected to the valve and comprising a cylinder with a movable piston (14), the piston being mechanically connected to said valve element, a fluid pump (47) operatively connected to said hydraulic cylinder, said pump adapted to supply fluid through a first hydraulic line (36) operatively connected between said hydraulic cylinder and said pump, said hydraulic line supplying a sufficient pressure to move the piston to said second position to cause the valve element to move to its second position, and a second hydraulic line (48) providing a fluid passage between the first hydraulic line and a reservoir (44) whereby a bypass control unit (39) is located in said second hydraulic line and comprising a movable element operating to open or close said fluid passage through the second hydraulic line providing a failsafe function to the valve. According to the invention a third hydraulic line (49) is connected to the second hydraulic line and acting on the movable element, forcing the control unit towards opening said passage.
Bibliography:Application Number: US201415026242