DEVICE FOR UNDERWATER SOIL MINING Russian patent published in 1994 - IPC

FIELD: mining and construction. SUBSTANCE: device includes collector with pulp discharge tube, diffuser and mixing chamber and tube to supply working fluid. To preclude pulp formation in ambient zone the collector is made with annular slot and cone section, and device has converging tube of funnel shape and jet-directing ring secured to collector by means of pylons and located in its annular slot. Ejecting nozzle is formed by inner edge of ring and converging tube, and soil-loosening nozzle, by outer edge of ring and conical section of collector. Axis of soil-loosening nozzle is directed at acute angle to longitudinal axis of converging tube. EFFECT: higher efficiency. 1 dwg