GATE VALVE Russian patent published in 2015 - IPC F16K3/18 

FIELD: machine building.

SUBSTANCE: invention can be used to cut off the flows of liquid and gaseous media in pipelines. Guides 4 are located at an angle to each other. A stem 5 with a wedge 6 at its end is installed in the casing 1. The wedge 6 in the lower part has spring-loaded stops 7 installed at an angle to each other. Rings 10 to which chains 11 are attached are pulled on bars 9. The chains 11 are connected to the disks 12. When lowering, the wedge 6 presses the bosses of the disks 12 by the spring-loaded stops 7. When the disks 12 reach the casing bottom by their lower ends, the spring-loaded stops 7 are compressed into the wedge 6 inside. The spring-loaded stops 7 and the wedge 6 pass between the bosses of the disks 12. The wedge 6 presses the disks 12 to seats 3. When the wedge 6 is lifted, the rings 10 and the chains 11 are lowered along the bars 9 into the lower wide part of additional faces 8.

EFFECT: invention is aimed at the improvement of gate valve operation reliability.

6 dwg