SHUTOFF SOLENOID VALVE Russian patent published in 2003 - IPC

FIELD: mechanical engineering; valves. SUBSTANCE: invention relates to valves set into operation by solenoid. In proposed shutoff solenoid valve additional valve is set into operation by solenoid formed by coil wound on core made of nonmagnetic material and provided with through channel. Permanent magnet made of rare-earth material is placed inside through channel, it adjoins by one and abuts with magnetic flux concentrator located further inside through channel. Plunger installed for sliding inside through hole is displaced from magnetic flux concentrator by spring and it projects from other end of through hole. Housing made of magnetic material closes magnetic flow path around solenoid and it has hole through which plunger projects. Additional valve contains holder made of rigid nonmagnetic material which adjoins housing and is provided with cavity keeping plunger out of contact with housing. Plunger selectively opens and closes auxiliary pipe passing through holder to set into operation diaphragm providing coupling with main seat of valve to control passage of medium through valve housing. Description of design versions is also provided. EFFECT: improved reliability of device. 9 cl, 3 dwg