BALL COCK WITH HOLLOW STOPPER Russian patent published in 2019 - IPC F16K5/06 F16K24/02 

FIELD: machine building.

SUBSTANCE: ball valve with hollow plug contains a housing with a cover with a flange connector between them, with inlet and outlet branch pipes, with a hollow plug between spring loaded seats, consisting of a shell and a hollow sphere, at the top and at the bottom of which channels are made, and in cover there is channel for medium supply from outside into hollow plug, seal of hollow plug and flange connector are made double-circuit, and between them channels of tightness control are made. Below between the shaft and the bushing there is a plate spring (damper) excluding the possibility of "burning" of the shaft. In the upper part of the hollow plug there is a slot in which the coupling pin is located, in turn, the coupling groove is connected to the pin of spindle transmitting torque, and due to slot and tenon located perpendicularly, coaxiality of spindle, coupling and hollow plug is provided. Ball valve cover via sealing element by means of threaded elements closes and sealing flange connector or as an option floating cover by means of sealing elements and split ring closes and seals the flange connector ball valve. Supply of working medium into ball valve is possible in both directions. Use of the disclosed ball valve with a hollow plug allows its application to the working medium, which at low temperatures changes viscosity and during long-term fixed state is coked, and also to heat and flush plug and seat seals.

EFFECT: use of the double-circuit seal enables checking the tightness of the plug, seats, cover before supplying pressure to the branch pipes and the crane cavity, and also provides for considerable reduction of weight of the ball valves, and accordingly cost and ensures competitiveness.

1 cl, 6 dwg