Document Type and Number:
Japanese Patent JPS5083989
Kind Code:
A
Abstract:
1461162 Unloading by currents of liquid MARCONA CORP 16 Jan 1974 [23 Nov 1973] 2023/74 Heading B8E [Also in Divisions B1 and E1] In a method of and apparatus for removing a body of material capable of being formed into a slurry, liquid stream are directed into the material from a first group of nozzles 38, 39, Fig. 8 carried in a housing 19 which is lowered into the material. The slurry thereby formed is pumped away to a zone remote from the housing by a discharge pump 104 in the housing, additional streams of the liquid being directed upwardly into the inlet of the pump from a second group of nozzles 120 in, for example, an ejector pump 114 in order to maintain the prime of the discharge pump. In the particular embodiment, each nozzle of a third group 36, 37 is longitudinally fixed relatively to the housing, while each of the nozzles of the first group is longitudinally movable (elevatable) by means of a hydraulic cylinder actuator 87, Fig. 8. Both types of nozzle 36, 37 and 38, 39 have nozzle parts 48, 64 which are swivellable through 280 degrees in a horizontal plane and are oscillated through this arc by rotary hydraulic actuators 51, 77, Figs. 9 and 10 controlled by rotary valves 56, 82. Pump 104 is driven by hydraulic rotary motor 111 of variable speed. In ejector pump 114, liquid from pipe 122 enters ring spray pipe 116, Fig. 14 and nozzles 120 direct the liquid into the inlet 118 of pump 104. In use, housing 19 is positioned on top of material 16 in a barge 17 by mobile crane 22, Fig. 1. Conduits 23, 24 and 26 are connected to an installation, not shown, for water supply, slurry discharge and hydraulic fluid supply respectively. Elevatable nozzles 38, 39 are fully raised and oscillated and the issuing streams of water are deflected downwardly by annular deflector 89, Fig. 8 and inner deflectors (92-95, Fig. 11, not shown). Pump 104 is also operated. As the legs 102, 103 of the housing 19 reach the floor of the barge 17 or any other suitable intermediate position, the nozzles 38, 39 are switched off and the fixed nozzles 36, 37 are operated without downward deflection due to their position. Ring spray pipe 116 is operated when the slurry level is low. Subsequently, and when the majority of material is removed, the fixed nozzles are closed and the elevatable nozzles lowered and operated to clean the floor and remove the remaining slurry.
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Application Number:
JP14339973A
Publication Date:
July 07, 1975
Filing Date:
December 20, 1973
Export Citation:
International Classes:
B65G53/30; (IPC1-7): B65G53/30