| 摘要 |
A sewer pipe for drainage connected to a manhole is provided to discharge rainwater gathered in an inner space of a manhole quickly by rotating a screw fan at high speed. The sewer pipe(53) for drainage connected to a manhole is formed by forming a retreated groove longitudinally on one side connected to a manhole(51) by forming an auxiliary wall(60) provided with an inlet and an outlet, and fixing many screw fans to a rotary shaft connected with an underwater motor. If rainwater filled in an inner space of a manhole(51) runs over a drain outlet(55) of a cover(54), a screw fan rotates at high speed by a rotary shaft connected to the underwater motor, so that the rainwater is inhaled through an inlet of a retreated groove and discharged through an outlet at high speed under high pressure. |
