DEVICE FOR CLEANING-OUT INNER SURFACES OF PIPELINES Russian patent published in 1994 - IPC

FIELD: machine-building. SUBSTANCE: device for cleaning-out the inner surface of a pipeline has an implement in thee form of a petal-shaped collar with wedge-type slits. The device further has a reciprocation mechanism and a cavitator with a stem extending through the collar. The reciprocation mechanism has the form of a cylinder associated with a collar and having at least one partition which divides it into chambers. A piston is set in each chamber for dividing it into a stem area and a piston area. Cavitator stem is associated with pistons. The stems hollows of the cylinder are communicated with the hollow disposed before the collar and the pistons hollows are alternatively communicated with the hollow disposed before the collar and the hollow disposed after the collar by means of a channel defined in the stem and a slide valve defined in the partition between the pistons. The slide valve is longitudinally displaceable within the partition and having the length exceeding the partition thickness. EFFECT: improved quality of cleaning. 2 dwg