PIPELINE VALVE GATE Russian patent published in 2005 - IPC

FIELD: piping.

SUBSTANCE: invention relates to gates with rotary disk designed for shutting down reverse flow in pipeline. Proposed gate contains body with seat, shaft and rotary disk. Disk is secured on shaft by lever provided with surfaces to contact rotary disk, and shock absorber. Lever is made sectional, consisting of at least one pair of bell-cranks-rockers. One bell crank-rocker is rigidly secured on rotary shaft and is flexibly and movable connected with rotary disk. Second bell crank-rocker is connected with rotary disk by axle. Arm of first bell crank-rocker is connected with arm of second bell crank-rocker by axle. Their relative angular displacement is limited in one direction by rigid stops, and in other direction, by shock absorber.

EFFECT: provision of compact closure of pipeline with rotary disk tightly fitting seat at low dynamic loads at moment of closing.

3 cl, 6 dwg