| 摘要 |
1516602 Picking up floating matter OCEAN ECOLOGY Ltd 17 Sept 1976 [19 Sept 1975] 38691/76 Heading BID [Also in Divisions H3 and H5] Floating sawdust or oil 122 is thrown upwards from the surface 121 of water into a collecting space 109 by acoustic waves of sonic or ultrasonic frequency produced by a submerged, electrically powered generator 90 and focussed on a region 120 just below surface 121. As shown the generator is mounted on a bridge 88 supported by an annular float 80 which is free to slide vertically between projecting arms (75) on a barge or self-propelled scavenging vessel (Fig. 5 not shown), the buoyancy of the float being adjusted by partly filling it with sea water using a hand pump (85), so that the oil can flow over it and between two outlet pipes 102 which support chamber 105 over the region 120, so that oil is thrown into the chamber up nozzle 107 and subsequently removed by pump 115 to storage tank (74). The generator 90 comprises a dished transducer 96 immersed in castor or silicone oil 95 under diaphragm 94 and focusses on a spherical region 120. Waste heat from the generator, dissipated by vanes 93, reduces the oil viscosity. An array of independently pivotable generators (Fig. 4 not shown) could focus on a common region, and an alternative generator (Fig. 3 not shown) has an elongate transducer to produce a cylindrical focal region which creates a sheetlike stream of oil. In Figs 1, 2 (not shown) the generator is located in a tank and throws oil over one side wall (20), the oil-water interface being maintained level with the focal region by controlling the delivery of oil-water mixture to the tank and the discharge of water from the tank bottom. |
