HYDRAULIC DRIVE FOR SHUTOFF AND CONTROL VALVES Russian patent published in 2020 - IPC F15B15/06 

FIELD: machine building.

SUBSTANCE: invention relates to machine building, in particular, to shutoff-control pipeline valves intended for shutting off and regulating flow of passing medium, and can be used in development of drives for shutoff and control valves. In the hydraulic drive housing, in addition to the axis of the actuator shaft, a parasitic gear and a compensation parasite gear are installed in a mirror manner relative to the axis of the drive response element, wherein the drive counterpart is in form of a gear wheel sector. Housing of said sector is divided in longitudinal direction into two isolated parts attached to each other through central part of said sector, with formation between them of profiled radial slot. Said slot accommodates double-acting hydraulic cylinder with piston. Gear rack, installed on its housing, interacts with parts of teeth of spurious gear and compensation parasitic gear, and peripheral parts of teeth of said stray gear interact with said isolated parts of drive gear ring mating sector.

EFFECT: improved weight and dimensional characteristics, simplified design and increased reliability of the drive.

1 cl, 3 dwg