ELECTRIC DRIVE OF PIPELINE VALVES WITH MANUAL OVERRIDE Russian patent published in 2023 - IPC F16K31/05 

FIELD: electric actuators.

SUBSTANCE: invention relates to multi-turn electric actuators for controlling pipeline valves both by means of an engine and manually and can be used in the field of nuclear and thermal power engineering, oil and gas production, water supply and chemical industry. Electric actuator of pipeline valves with manual override contains an electric motor and a housing, including a cylindrical or bevel gearbox located in the housing, the input gear of which is rigidly fixed on the motor shaft, and the output gear of this gearbox is rigidly fixed on the planetary gearbox. In this case, the outer side of the crown gear of the planetary gearbox is made in the form of a worm wheel and is connected to the manual override control unit, including the worm and the control wheel, and the planetary gearbox contains an additional crown gear located below the main crown gear on the same axis parallel to it and has the number of teeth, at least one tooth more or less n=±1 than the main crown gear. In this case, both crown gears have the same pitch diameters and are interconnected by satellites, which, in turn, are kinematically connected to the sun gear of the planetary gearbox, which is connected to the input shaft of the electric drive, and the additional crown gear is rigidly connected to the output shaft of the electric drive, and the control unit manual override additionally contains springs on the worm shaft.

EFFECT: improving the reliability of the electric drive by simplifying the kinematic diagram for separating the control of shut-off valves from the electric motor and manual override.

1 cl, 3 dwg