GATE VALVE Russian patent published in 2003 - IPC

FIELD: pipeline valves and fittings. SUBSTANCE: invention is designed for regulation and cutting off delivery of working medium passing along pipelines of different systems. Proposed gate valve contains housing with outer and inner flanges. Seals and slide are installed between flanges. Slide is provided with passage hole arranged eccentrically, and drive mechanism. Gate valve is furnished with additional ring installed between inner flanges of housing. Additional ring is of thickness greater than that of slide and is provided with slot to accommodate gear of drive mechanism and seat for "OPEN-CLOSED" indicator. Drive mechanism is made in form of gear segment fitted in slot on periphery of slide, and gear installed on drive axle arranged in inner flanges. Drive mechanism is furnished with seal and locks in form of studs. Inner flanges of housing are provided with seats for bushings with additional seals of elastic material and blind holes for central axle of rotation for slide. EFFECT: improved reliability of device and its repairability, increased service life. 3 cl, 4 dwg