BALL COCK Russian patent published in 2006 - IPC F16K5/06 

FIELD: pipe valves and fittings.

SUBSTANCE: invention relates to ball cocks designed for closing passage of pipelines transporting natural gas, liquefied hydrocarbon gas, liquid oil products, steam, water and other media. Proposed ball cock has body, inlet and outlet branch pipes, ball stopper, elastic seats installed in bores of branch pipes, disk springs pressing seats to stopper and rigid intermediate rings. The latter are installed for interaction with elastic seats to transmit axial sealing force from disk springs to seats and radial sealing force from disk springs to branch pipes. Cross section of rigid intermediate ring is trapezoidal. Larger base of trapezium is pointed to periphery of ring and it adjoins surface of bore of branch pipe. Tilting of side of trapezium adjoining disk spring corresponds to tilting of generatrix of disk spring in working state. Rigid intermediate ring is made of homogenous, for instance, sintered material.

EFFECT: improved sealing of ball lock relative to ambient medium owing to improved sealing in "ball stopper-elastic seat-branch pipe" units.

3 cl, 3 dwg