FIELD: oil and gas industry.
SUBSTANCE: device for hydrocavitation treatment of underwater surfaces comprises a dish-shaped platform with wheels and a jet propeller, a hand wheel for control of the device movement, a rotor mechanism, a unit pressing the device to the treated surface with the upper and lower coaxial flat discs with mutually overlapped openings, a collector for distribution of cavitation jets with radial tubular hollow spokes at which ends rotable cavitators and fixing elements are placed. The rotor mechanism is made as a hermetically sealed central hollow head with two unions, one of them is coupled to the line of working medium delivery. The jet propeller comprises a nozzle extension and tubular elements and an adjustable valve is installed between them. The first tubular element is connected to the other union of the central hollow head. The nozzle extension of the jet propeller is mounted at the end of the second tubular element. The collector for distribution of cavitation jets is coupled to the central head cavity. In the upper disc of the device pressing unit there are openings placed in circular zones with diameter d, and in the lower disc there are openings with diameter not less than d. At the upper disc there are gripping elements, which turn the disc. At the lower disc there are radial flat-topped lamellar screens placed at the angle of 10-70° to the treated surface.
EFFECT: increasing reliability of the device, efficiency of its operation, improvement of treatment quality under water.
4 cl, 4 dwg
