CONCRETION EXTRACTION COMPLEX Russian patent published in 2009 - IPC E21C50/00 

FIELD: production processes.

SUBSTANCE: proposed complex relates to hydromechanical complexes designed to extract concretions from sea floor. The proposed complex comprises station ship, pulp pump with inlet and outlet branch pipes, pressure pipeline flange-joined with outlet branch pipe and perforated branch pipe. Note here that the perforated branch pipe holes are taken to equal the minimum sizes of extracted concretions. The pressure pipeline is arranged vertically. The pipeline surface part is hinged to the end of the rotary crane lifting jib to up and down the said pipeline and to move it horizontally. The pipeline top part is connected, via a flexible hose, with concretion receiving device. There are four cylindrical pontoons located at the pipeline medium part symmetrically to its lengthwise axis that can be filled with water and air flushed. Note here that these pontoons are arranged on the pipeline between its flanges and pressed thereto with the help of flexible retainer rings. A cantilever rotary frame is arranged on the pipeline lower part to rotate about it in horizontal plane, articulated to its drive. Two vertical cross section blades are attached, from below, to the frame in symmetry with suction branch pipe to rest of sea surface floor, to grip concretions and move to the suction branch pipe. Every blade profile represents a logarithmic spiral with its pole aligned with the suction branch pipe axis. Note that the blade outer, relative to suction branch pipe, and inner edges are bent out towards the frame rotational direction. The blade adjoins the suction branch pipe with a minimum circular gap. The suction branch pipe represents a tapered cone widening downward. The concretion receiving device represents an inclined feed grate designed to receive dehydrated concretions to be placed into containers. There is a sump located under the said feed grate.

EFFECT: simpler and chipper design, atraumatic extraction.

4 cl, 5 dwg