CYLINDRICAL COCK Russian patent published in 2000 - IPC

FIELD: piping systems; shutoff devices to control liquid flow in technological processes, water and heat supply systems. SUBSTANCE: cock has cylindrical gate, housing in which cylindrical gate is installed for rotation, rotary spindle with fitted- on handle and rotary spindle sealing unit. Through channel of gate is formed by pipe welded to gate. Axis of pipe is square to axis of gate. Cock is provided with flanges welded to housing. Sealing members in form of two inserts made of polyamide or graphite-reinforced plastic are placed in bores of flange. Inserts play the part of sliding bearing, enclosing cylindrical gate over side and end face surfaces with slide fit. Alignment of gate in housing is provided at assembling of cock. Housing is made in form of cut of pipe. Rotary spindle is provided with projection on lower end and is arranged in bushing driven into cock. Bushing engages with spindle through its circular bead. Gaskets made of polyamide or graphite- reinforced plastic and enclosing the spindle are mounted at two sides of bushing circular bead. Gaskets play the part of sliding bearing. Rotary spindle sealing unit is made in form of bushing. Sealing rings are fitted in grooves on inner and outer surfaces of above- indicated bushing. EFFECT: reduced metal usage and labour input in making of cock, enhanced reliability in operation. 2 cl, 3 dwg