ROTARY GATE Russian patent published in 2004 - IPC

FIELD: pipeline valves and fittings. SUBSTANCE: invention is designed for closing and opening of main pipelines used for transportation of liquid or gaseous media. Proposed rotary gate contains housing with seat secured from inlet. Disk shutoff member with elastic sealing ring is secured on axle-shafts projecting from housing and connected with drive. Ring sections of axle-shafts are installed in bearing units which are fitted in diametrically opposite holes of shutoff member. Seat is made floating in radial direction in form of thin-walled cylinder with flange. Outer diameter of seat is smaller than inner diameter of housing. Seat is secured in housing by means of threaded bushing. Socket is made ion end face of housing in place of its conjugation with seat flange. Rubber ring is installed in socket to seal seat relative to housing. Shutoff member sealing ring is made in form of metal reinforced rubber ring. Sealing ring is installed in circular groove and is pressed by cover. Circular groove is made in disk shutoff member. Ring projections are made on inner end face surfaces of shutoff member and cover. Ring projections are made in form of tooth in section. Reinforcement of seal is made in form of perforated ring with centering radial projections. Radial projections get out of sealing ring from side of its inner diameter. Said projections are conjugated with outer diameter of circular groove and they form ring clearance between seal and shutoff member. Ring clearance communicates through hole in cover with gate inlet. Outer diameter of gate is less than outer diameter of seal. EFFECT: improved reliability and sealing of rotary gate. 7 cl, 3 dwg