PIPELINE GATE Russian patent published in 2021 - IPC F16K1/44 F16K3/36 F16K5/22 

FIELD: pipelines.

SUBSTANCE: pipeline shutter comprises a body, a shutoff member, two seats, a shutoff member drive, a lubricant fluid between the shutoff member and seats, a lubricant supply union, a lubricating fluid injector, wherein the seat on the surface in contact with the shut-off member has an annular groove, a channel extending from the annular groove to the outer surface of the seat, the pipe-type gate includes a tube located inside the body of the gate, wherein saddle, tube, nozzle, injector are rigidly connected, and cavity, limited by shut-off element, annular groove, channel in seat, tube, nozzle and injector forms sealed closed space, filled with lubricating liquid with constant properties during operation, wherein tube design allows tube end adjacent to seat to freely move with seat, wherein forcing device creates pressure within 1.5–5.0 of process medium pressure in inlet branch pipe, and the tube is made of chrome-nickel stainless steel, which is well elastic and plastic deformation.

EFFECT: invention provides tightness and multiple reduction of opening forces at whatever characteristics and directions of process medium.

8 cl, 4 dwg