COMBINED MOTOR AND MANUAL CONTROL DRIVE Russian patent published in 2008 - IPC F16K31/05 

FIELD: production of stop valves.

SUBSTANCE: invention relates to production of stop valves and is designed to be used at industrial pipelines as a combined shut-off control. The combine motor and manual control valve incorporates a casing accommodating a forced engagement cam coupling moving axially, the said cam coupling forced travel mechanism with the cam coupling retainer and an output gear-shaft fitted aligned with the motor shaft and furnished with a brake. The manual back-up flywheel shaft axis in the casing is perpendicular to the motor shaft. The manual back-up shaft is linked, via a bevel gear, with a bevel hear wheel fitted aligned with the motor shaft. The bevel gear wheel inner surface is furnished with cams. The aforesaid cam coupling is made up of two half-couplings, the first one being a split one containing a cup accommodating a splined yoke turning around its axis. The yoke outer side surface is furnished with cams to interact with the gear wheel cams. The cup is furnished with a shoulder arranged at its top part. The said cup side surfaces have, at least, two holes with working profile surfaces. The cup outer end face surface houses, at least, two opposing cams. A guide shaft supporting the first half-coupling cup is splined on to the motor shaft. The guide shaft side surface accommodates the pins fitted to interact with the cup working profile surfaces. The guide shaft free end accommodates the second half-coupling with cams arranged on its end face surface to interact with the cup end surface cams. The second half-coupling side surface is furnished with lengthwise slots receiving the splined sleeve splines. The output gear shaft is keyed in the second half-coupling. The cam coupling forced travel mechanism is provided with a lever-yoke to interact with the first half-coupling cup shoulder.

EFFECT: higher safety of thrive control due to elimination of impact loads in the manual back-up flywheel.

2 cl, 10 dwg