VALVE CONTROL WITH AXIAL FLOW FOR ENERGY FACILITIES Russian patent published in 2012 - IPC F16K1/12 F16K47/14 

FIELD: machine building.

SUBSTANCE: valve comprises cylindrical housing (1) with input (2) and output (3) pipes and cowl (7) attached to lid (4) of the body through pylon (5) with formation of annular channel (6), which is movable in the cavity along the the valve axis through the toothed rack and pinion drive mechanism (8), unloaded cylindrical piston (9) is set, overlapping the outlet valve during movement and contacting with annular seat (12), rigidly fixed to the outlet pipe. The valve is characterised in that the saddle is made with bearing collar (13) in the area of contact with the piston and the piston is provided with concave front surface (15), along the perimetre of which the surface is formed (16), responsive to the contact surface (14) of the bearing collar of the seat. The seat is equipped with flow divider (18) mounted on the outer end surface (19) seats and performed in a perforated plate, holes (20) on which have variable perforation pitch. The bearing collar of the seat is made with a diffuser section.

EFFECT: use of the valve makes it possible to reduce the influence of cavitation processes on the surface in contact with operation environment.

3 cl, 5 dwg