FLAT GATE VALVE Russian patent published in 2019 - IPC F16K3/02 F16K3/312 F16K27/04 F16K37/00 

FIELD: machine building.

SUBSTANCE: gate valve comprises supply shaft, damper, bearing assembly and spring. Supply shaft is secured against rectilinear displacements by bearing assy. Shaft accommodates feed shaft position. Valve has indicator of visual control, gate position in working condition. Indicator has an axis fixed in the middle part of the gate valve and spring-loaded by spring; the indicator also has a visual part. Gate valve has grooves, which are located on upper and lower halves of gate valve, at an angle to central axis. Feed shaft is rigidly fixed with flywheel, on other side it is screwed into nut rigidly fixed in gate, wherein feed shaft is arranged in damper inner cavity. Gate valve has trapezoidal groove for sealing rings. Trapezoidal groove has cross-section area larger than that of sealant.

EFFECT: higher reliability of mechanism, prevention of external environment, which will prevent locking of screw, and visual control of closed position gate allows to avoid emergency situation.

1 cl, 4 dwg