ELECTROPNEUMATIC CONTROL DEVICE FOR BALL VALVE PNEUMATIC DRIVES

摘要

FIELD: gas and oil producing industry; control valves. SUBSTANCE: proposed device is designed for remote and local control of pneumatic and pneumohydraulic drives of shutoff and control valves used in gas and oil lines. Device has pneumatic valves whose inlets are coupled with working medium pressure source and outlets, with device outlet channels. It has also electromagnets mechanically coupled with pneumatic valves, and reed relay-magnetic limit switches. Electromagnets and reed relays of limit switches are placed in one explosion-proof chamber, and movable permanent magnets are located outside explosion-proof chamber. Each magnet is coupled with inlet shaft by accelerating two-step leverage whose levers are spring-loaded. EFFECT: improved reliability. 4 cl, 7 dwg