DEVICE FOR LIQUID INJECTION INTO ACTIVE GAS PIPELINE Russian patent published in 2003 - IPC

FIELD: operation of equipment for compressed gases; applicable in gas, oil and other industries. SUBSTANCE: device has shutoff valve installed on gas pipeline branch and carrying sluice consisting of body with seal and pressure bushing, and hollow rod installed on sluice for axial motion and provided with injector on its lower end and pipe union for liquid supply on its lower end, and hollow rod drive located on sluice. Upper end of sluice body has captive nut with outer circular recess for receiving drive base and possible its removal. Pressure bushing has bearing area installed on upper end of sluice body and provided with cylindrical branch pipe passed through captive nut central hole and installed on its bearing area. Upper end of cylindrical branch pipe has vertical groove through which pipe union for liquid supply is passed. Made on hollow rod upper end, above pipe union for liquid supply is radial hole which, together with through radial hole made on upper end of cylindrical branch pipe, receives pin for locking hollow rod in its working position. Drive is made in the form of removable winch whose base is located in outer circular recess sluice body captive nut, and crown block installed on hollow rod upper end. Rope fixed end secured to winch base is roved through crown block pulley. Device makes it possible to replace bulky metal intensive design of hollow rod drive with removable winch with crown flow and rope, more single and convenient in operation, and to provide for use of one drive on various points of liquid injection into gas pipeline, with simultaneous keeping of hollow rod in its working position after drive dismantling, or in changing over of drive to standby state that results in considerable saving on resources. EFFECT: improved design of device and higher efficiency. 2 cl, 2 dwg