| 摘要 |
PURPOSE: An underground floor structure for preventing the inflow of rainwater is provided to effectively drain water by preventing the backflow of sewage. CONSTITUTION: An underground floor structure for preventing the inflow of rainwater comprises a drainpipe(20), a first door(30), a second door(40), a tube(50), a bottom plate(60), a controller(70), an opening and shutting door(80) and a rotating plate(90). The drainpipe lets the sewage generated on the ground to flow into a lower sewer pipe(12). The first and the second door are opened by the flow force of the sewage flowing in and are closed by the flow force of the sewage flowing back. Air flows in and out of the tube. The bottom plate vertically moves according to the internal pressure and water pressure change of the tube. The controller controls the air pressure of the tube. The opening and shutting door is fixed on a drainage portion(23) to be rotated. |
