NOZZLE HEAD FOR HYDROCAVITATION CLEANING OF PIPE-LINES FROM UNDESIRABLE DEPOSITS Russian patent published in 1998 - IPC

FIELD: removal of various impurities from pipe-lines. SUBSTANCE: nozzle head has a body with a nozzle duct for passage of working fluid, disk deflector installed at the duct outlet and having a sharp edge on the end periphery for excitation of cavitation process. The body end on the side of the disk deflector has a central projecting cylindrical shoulder with a tapered section conjugate to it, with a second sharp edge made on its periphery to intensify the cavitation process. Both edges are formed by means of aligned annular bulges; the end of the disk deflector is attached to the end of the cylindrical shoulder by means of a detachable joint; the outer surface of the disk deflector is tapered and inclined towards the body. The nozzle duct is formed by through holes uniformly arranged in circumference of the tapered section; the hole axes are perpendicular to the outer surface of the given section and are positioned between the bulges. EFFECT: reduced overall dimensions due to a high hydrocavitation effect. 2 cl, 1 dwg