FORCED DRAIN PIPING STRUCTURE AND FORCED DRAIN SYSTEM

PROBLEM TO BE SOLVED: To provide a forced drain piping structure and a forced drain system which enable smooth draining from a drain source through a horizontally laid pipe in an underfloor space having a height limitation, and can deal with a blackout situation. SOLUTION: According to the forced drain piping structure and forced drain system, the drain source 4 is connected to a drain vertical pipe 1 via a drain horizontal branch pipe laid horizontally in the underfloor space, and a drain pump P is interposed between the drain source 4 and the drain vertical pipe 1 to carry out forced draining. A branch pipe 6 is disposed at the upstream side to the drain pump P, and one of branched pipes from the branch pipe 6 is provided with the drain pipe P and the other of the branched pipes is provided with a solenoid valve 7 controlled to open when blackout occurs and to close when the system is supplied with currents. A bypass drain pipe 8 leading to the drain vertical pipe 1 is connected to the downstream side of the solenoid valve 7. When the system is supplied with currents, wastewater is drained from the drain horizontal branch pipe 2 to the drain vertical pipe 1 by the drain pump P. When blackout occurs, the solenoid valve 7 opens to guide wastewater from the branch pipe 6 thorough the bypass drain pipe 8 to the drain vertical pipe 1. COPYRIGHT: (C)2007,JPO&INPIT