ELECTROMAGNETIC SHUTOFF VALVE Russian patent published in 2014 - IPC F16K31/06 

FIELD: machine building.

SUBSTANCE: electromagnetic shutoff valve is meant for being used in instruments and systems with automated control. An electromagnetic shutoff valve includes a solenoid with a core, a constant magnet, a pole tip having a supply gas channel, magnetic conductors closing an external magnetic field of the solenoid. Besides, the first magnetic conductor envelopes the solenoid. The second magnetic conductor is made in the form of a ring with an outlet gas channel and located on the side of the solenoid end face. Inner surface of the second magnetic conductor and end surfaces of the core and the pole tip form a through cavity. An armature made as per the shape of the above through cavity is located in the same through cavity. The above armature has the possibility of axial movement. Besides, the armature, the core, the first and the second magnetic conductors are made from soft magnetic material. Gas channels are open to the through cavity. The electromagnetic shutoff valve is equipped with an additional magnetic conductor from soft magnetic material. Constant magnet is ring-shaped and has axial magnetisation and is located between the second and additional magnetic conductors in magnetic contact with them. The pole tip is located coaxially to constant magnet and is in magnetic contact with the additional magnetic conductor.

EFFECT: improving tightness of the valve and its working pressure.

5 cl, 1 dwg