CONSTANT LOW-PRESSURE SHUTOFF ELECTROPNEUMATIC VALVE Russian patent published in 2013 - IPC F16K31/02 

FIELD: machine building.

SUBSTANCE: constant low-pressure shutoff electropneumatic valve includes an adjustment element to the specified low pressure, a high-pressure cavity with a gas supply channel, and a cylindrical chamber. Control electromagnetic valve includes an inlet seat interconnected with the gas supply channel, a control element and an outlet seat. Moving element with two stocks is equipped with a limit stop and forms an auxiliary cavity with a mechanical spring in the chamber and a low-pressure cavity on the opposite side. Low-pressure cavity is separated from the high-pressure cavity with a control gate valve and moving seat made in the end face of the first stock and interconnected through a channel in the moving element and stocks to the low-pressure cavity. The channel in the moving element and stocks is straight-flow. The auxiliary cavity is connected to atmosphere. In the cylindrical chamber there is an additional working cavity located between the moving element and the low-pressure cavity and interconnected with that cavity through a feedback channel. Control electromagnetic valve is built into the above feedback channel so that its cavity is interconnected with the working cavity and the outlet seat is interconnected with the low-pressure cavity.

EFFECT: improving quick action of a shutoff electropneumatic valve.

1 cl, 1 dwg