VALVE FOR PIPELINES SHUTDOWN Russian patent published in 2015 - IPC F16K7/07 

FIELD: machine building.

SUBSTANCE: valve contains through body with expansion and seat, elastic lock in form of a cylindrical casing with rigid bottom, located in the body expansion, and control system in form of 3-way valve connected by means of pipelines with valve input and output. Axis of the cylindrical casing is at right angle to the seat surface. In the cylindrical casing the extendable support bushing is installed. The external surface of the support bushing in compressed position is single cavity hyperboloid of revolution with generatrix length equal to height of the cylindrical casing. The support bushing is made out of two parts with guides and possibility of axial movement relatively to each other. One part of the support bushing is secured on the valve bonnet, and another - on the rigid base of the shut-down device.

EFFECT: simplified design and smaller sizes of valve.

2 dwg