DEVICE FOR CUTTING HOLE IN OPERATING PIPELINE Russian patent published in 2010 - IPC B23B41/08 F16L41/04 

FIELD: technological processes.

SUBSTANCE: invention is related to devices intended for cold cutting of holes in operating pipeline in order to further connect branch pipes to oil pipeline. At the end of hollow spindle there is cutting tool installed. Inside spindle there is screw arranged, and outside of it - cartridge. Nut is screwed onto screw end, which is opposite to cutting tool, and is connected to spindle. Key for connection of cartridge and spindle is fixed on spindle. The first geared wheel is fixedly joined to cartridge, and the second geared wheel - to screw, which have uneven number of teeth. Two gears interact with geared wheels and are installed on shaft, which is kinematically connected to motor shaft. Two stands and fixed axis are parallel to each other. Claw clutch and gear are put onto fixed axis with the possibility of angular motion. Gear has cams and interacts with clutch cams, being engaged with the first geared wheel. Lever arms are connected to carriages. One of them is connected to block of gears, and the other one - to claw clutch. Lever moves block of gears and claw clutch till disengagement with the first geared wheel.

EFFECT: invention provides for reduction of kinematic pairs number and increased rigidity of torque transfer from motor shaft.

4 cl, 5 dwg