| 摘要 |
PURPOSE: Provided is an air supplying apparatus being simultaneously sucking wastewater and inhaling air to a sucking pipe by a self-priming pump so as for wastewater and air to reach to an impeller of a water lifting machinery, thereby mixing air and wastewater in short time. CONSTITUTION: The apparatus comprises a water sucking pipe(1), an inner pipe(2) provided in the water sucking pipe(1), wherein the water sucking pipe(1) and the inner pipe(2) have respective ends welded into each other at a side and respective the other ends connected to a flange of a water lifting machinery at the other side, an air hole(3) formed in the water sucking pipe(1) so as for air to be inhaled therethrough and move along a gap(3-1) between the water sucking pipe(1) and the inner pipe(2), and a protection ring(4) formed around the air hole(3) for protecting the air hole(3).
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