REGULATING APPARATUS Russian patent published in 2004 - IPC

FIELD: pipeline fittings, namely cutting-off apparatuses with rotary shut-off organs, particularly used in technological lines of gas fields for controlling flow rate of natural gas.

SUBSTANCE: regulating apparatus includes housing. Upper and lower rotary dampers are arranged in flow-through duct of housing. Dampers are mounted on two rotary axles coupled by means of gearing with drive mechanism. The last includes rod with annular protrusion in central portion. Said annular protrusion is arranged inside housing and outside zone of flow-through duct and it is provided with rack-sleeve embracing it from downwards. Rack-sleeve has stepped openings adjoined with surfaces of rod and of its annular protrusions. Rack-sleeve is mounted with possibility of axial motion and fixation of it in limit positions and with possibility of engagement with gear wheel of rotary axle of lower rotary damper. Annular protrusion of rod is in the form of toothed rack engaging with pinion of rotary axle of upper rotary damper. Diameter of pitch circle of gear wheel of upper rotary damper exceeds by two times that of gear wheel of rotary axle of lower rotary damper.

EFFECT: simplified design, enhanced operational reliability, improved repair ability, increased useful life period of apparatus.

3 dwg