Abstract: An automatic discharge connection device of a submersible pump is provided, which includes a coupling member coupled to a discharge port of the submersible pump and a feed pipe that feeds water discharged from the submersible pump. A sealing member is installed in an annular concave portion formed on an inner circumference of the coupling member in such a way as to move left and right. When the submersible pump is actuated, the sealing member moves toward the feed pipe and an end portion of the sealing member enters the feed pipe. Accordingly, a space between the coupling member and the feed pipe is sealed to thereby prevent water leakage between the coupling member and the feed pipe.

Abstract: The present invention relates to an automatic discharge connection device of a submersible pump, including a coupling member coupled to a discharge port of the submersible pump and a feed pipe for feeding water discharged from the submersible pump. A sealing member is installed in an annular concave portion formed on an inner circumference of the coupling member in such a way to move left and right. When the submersible pump is actuated, the sealing member moves toward the feed pipe and the end portion of the sealing member enters the feed pipe. Accordingly, between-the coupling member and the feed pipe is sealed to thereby prevent a water leakage between the coupling member and the feed pipe.

Abstract: A lifting pump for manganese nodules includes: a cylindrical body that is sealed at upper and lower portions thereof by a semi-spherical upper cap having a fluid outflow port and a cable insertion tube, and by a semi-spherical lower cap to which an inflow case of a pump unit is coupled; a pumping motor that has a fluid passage formed between an inner surface of the body and an outer surface thereof, is vertically fixed in the body, and drives the pump unit using electric power supplied through a cable; a cover that provides a seal around a shaft of the pumping motor; the pump unit that is installed between the shaft of the pumping motor and the semi-spherical lower cap, is driven by the rotation of the pumping motor, and lifts seawater together with the manganese nodules; a sealing means that provides a seal between the pumping motor and the pump unit; and a reducer that is coupled to the bottom of the pump unit and guides the seawater including the manganese nodules to the pump unit.

Abstract: A sealing structure for an underwater pump comprises an elbow pipe having a first flange formed at an inlet thereof with an inclined inner surface; an underwater pump having a second flange formed at an outlet thereof; a guide member attached to the second flange and disposed between guide bars vertically mounted under the water so that the guide member is vertically movable along the guide bars, wherein the guide member comprises an annular hollow portion disposed between the outlet and the inlet; and a gasket mounted to the annular hollow portion, wherein the gasket comprises a tapered front portion with an inclined surface that makes close contact with the inclined inner surface of the first flange.

Abstract: Disclosed herein is a sealing structure of an underwater pump for preventing a water leakage between the under water pump and an elbow pipe A system for controlling the operation of a washing machine. The sealing structure of the underwater pump comprises an elbow pipe having a flange formed at an inlet thereof, an underwater pump having a flange formed at an outlet thereof, a guide member attached to the flange formed at the outlet of the underwater pump. The guide member is disposed between guide bars vertically mounted under the water so that the guide member is vertically movable along the guide bars. The guide member has an annular hollow part disposed between the outlet of the underwater pump and the elbow pipe. The sealing structure of the underwater pump further comprises a gasket mounted to the annular hollow part of the guide member. The gasket has a front part making close contact with an inner surface of the flange formed at the inlet of the elbow pipe.