APPARATUS FOR TREATING INNER SURFACE OF TUBES

摘要

FIELD: shot blast treatment of product surface, namely treatment of inner surfaces of elongated tubes and ducts with diameter. SUBSTANCE: apparatus includes nozzle for accelerating and mixing energy carrier and working matter; contraction arranged concentrically in output portion of said nozzle and forming by its free end together with treated surface slit-type working zone for accelerated double-phase flow acting mechanically and physically upon contour of tube surface. Said contraction is mounted with possibility of rotation and lengthwise oscillation relative to tube surface. It intensifies flow action upon tube surface and provides additional energy capacity of process. EFFECT: improved design. 4 cl, 4 dwg øøø1