| 摘要 |
An apparatus for dredging shellfish includes a digging jet connected to a source of pressurized water for liquifying sediment and directing the sediment and any shellfish in the sediment toward a digging blade and separating device, the separating device being arranged to separate out sediments, shellfish, and debris having a dimension smaller than a minimum dimension, and a suction chamber arranged to collect shellfish that has passed the separating device for conveyance to the surface. Between the separating device and suction chamber is a second separating device in the form of a plate having a plurality of openings for further separating shellfish from debris and clumps of sediment having a dimension larger than a maximum dimension of the shellfish to be collected. The shellfish are conveyed to the surface by a Venturi tube connected to the pressurized water source in such a manner that water from the pressurized water source is directed into the tube away from the suction chamber so as to siphon water from the suction chamber in the direction of the surface, and thereby carry shellfish in the chamber to the surface.
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