DEVICE FOR CLEANING INTERNAL SURFACES OF TUBES Russian patent published in 2001 - IPC

FIELD: heat-power engineering; devices for cleaning internal surfaces of tubes. SUBSTANCE: device is made in form of nozzle consisting of two segments made from halves of tube cut along generatrix. Segments are shifted relative to longitudinal axis of nozzle at eccentricity ε, thus forming slits between pairs of edges. Segments fastened together at their ends are introduced into tube to be cleaned. Working fluid under pressure is fed inside tube to be cleaned through pipe union. Reaction of jet escaping from slit between edges of segments makes segments revolve around their axes. Difference between velocities of flow around edges of segments gives to vortex and consequently to ultrasonic waves. Nozzles is screw type for removal of products of cleaning, thus forming effect of non-hermetic screw pump. EFFECT: enhanced efficiency. 5 cl, 3 dwg