VALVE UNIT Russian patent published in 2016 - IPC F16K17/40 

FIELD: construction.

SUBSTANCE: valve unit comprises at least two valves including bodies with inlet and outlet nozzles, gates, pistons, installed in body bores. In the bodies there are lugs with bores connected tightly to each other at ends. Jets are provided at the side of body inlets. Two bores are made along the axis of the body inlets. The gates and pistons installed in the body bores are made in the form of spring-loaded stepped pistons. A stepped bushing with holes is installed in the bores of the body lugs, creating a flow through cavities between small steps and the lug bore. Channels are arranged in the body of the first valve, which connect the inlet cavity upstream the jet and the above-piston cavity of the first valve via holes of the stepped bushing and the flow through cavity. In the body of the second valve there is a channel connecting the above-piston cavity of the second valve via the stepped bushing holes and the flow through cavity of to the inlet cavity of the first valve.

EFFECT: use of the specified valve unit makes it possible to use the pressure of the working fluid for a valve drive without an electric control command to the valve drive, which simplifies the design, reduces weight and makes it possible to use it many times.

3 cl, 1 dwg