DRIVE FOR PIPELINE VALVES Russian patent published in 2015 - IPC F16K31/05 

FIELD: machine building.

SUBSTANCE: invention relates to drives for the pipeline valves. The pipeline valve drive contains a first gearbox with input and output shafts installed coaxially, motor. The said motor is connected with input shaft of the first gearbox ensuring the possibility of the rotation transmission to the input shaft of the said gearbox. The lock device is made with possibility to lock the motor shaft. The manual drive is connected with the first gearbox via the worm gear ensuring possibility of the rotation transmission of the manual drive to the output shaft of the said gearbox. The worm of the worm gear is made with the possibility of the progressive axial movement limited by the resilient elements, due to transmission to it of part of the motor torque. The drive contains motor switches, made with possibility of their activation by the worm interaction with them, at its progressive axial movement, and output shaft of the drive with the difference that it contains double-side limiting coupling to limit torque, by means of the coupling the motor with input shaft of the first gearbox, and second gearbox connected with the first gearbox with possibility of the rotation transmission from the first gearbox to the output shaft of the drive.

EFFECT: invention reduces probability of damage of the gear or other system components.

8 cl, 3 dwg