PUMPING DRAINAGE DEVICE

• Main Authors: SHIGEMATSU KUNIHARU, TOYOFUKU SHINJI, NODA SHOSAKU, SATO HIROFUMI
• Format: Patent
• Language: English
• Published: 02.10.2003
• Edition: 7
• Subjects: BLASTING; DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; FIXED CONSTRUCTIONS; FLUSHING VALVES THEREFOR; HEATING; LIGHTING; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT PUMPS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; SEWERAGE; SINKS; WATER SUPPLY; WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; WEAPONS

PROBLEM TO BE SOLVED: To provide a pumping drainage device which is equipped with a check valve part capable of sanitarily and easily eliminating drainage remaining in a conveying pipe. SOLUTION: This pumping drainage device is equipped with: a tank in which the drainage from a drain fitting can be stored; a pressure pump part for sending the drainage in the tank outward; the conveying pipe in which one end communicates with the pressure pump part and in which the other end is opened to air above the pressure pump part; and the check valve part for connecting the pressure pump part with the conveying pipe. The check valve part is quipped with: a communication passage which makes the pressure pump part communicate with the conveying pipe; a valve seat which is provided around a communication port, on the side of the conveying pipe, of the communication passage; a valve element which is moved on the opening direction of the communication port by the drainage pumped when the pressure pump part is driven and which abuts on the valve seat by the pressure of the drainage flowing back during the stop of the pressure pump part, so as to close the communication port; and a forcible opening means for forcing the valve element to move and accelerating a back flow. COPYRIGHT: (C)2004,JPO