Wastewater transport system for a public transport toilet

摘要

A wastewater transport system for a public transport toilet which discharges into an on-board aerated wastewater storage tank and a waste water tank (1), means for generating underpressure or overpressure in the wastewater tank (1), transporting the wastewater either to the intermediate wastewater tank (1) or to effect the storage tank, and discharge valve means (3, 5, 6, 7) arranged to selectively regulate the waste water flow between a toilet bowl (2) and the intermediate tank (1) and between the intermediate tank (1) and the sewage storage tank, characterized in that the purge valve means comprises a 3-way multi-port purge valve (3) connected to an inlet / outlet port (4a, 4b) of the intermediate sewage tank (1), the 3-way valve (3) 3) with a plurality of connections a valve body (6) with at least three ports (9, 10, 12) and a valve element (7), which in the V The rotary valve element (7) is provided with a first conduit or a first sewer (8), which, when the rotary valve element (7) in the first Working position, a first terminal (9) for allowing the fluid flow between the toilet bowl and the intermediate tank (1) with a second terminal (10) of the valve body (6) connects, and provided with a second conduit or a second sewer (11), the or, when the rotary valve member (7) is in a second operative position, the second connection (10) for permitting the fluid flow between the intermediate tank (1) and the waste water storage tank with a third connection (12) of the valve body (6) connects , Wherein this rotary valve element (7) is adapted to the connection between the toilet bowl (2) and the vented wastewater storage tank when working in either the first or second working position, and wherein the system includes a processing and control unit configured to selectively activate actuation of the rotary valve member (7) from the first working position to the second working position to provide a direct flow connection between the toilet bowl (2) and the intermediate waste tank (1) in the first working position when the pressure generating means in the intermediate waste water tank (1) generate negative pressure, and in the second working position a direct flow connection between the intermediate waste water tank (1) and the vented wastewater storage tank when the pressure generating means in the intermediate waste water tank (1) generate overpressure.