| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an underwater aeration device having a water/air suction part so constituted that still more air can be caught, and to provide an underwater aeration device having a water/air suction part so constituted that clogging of a waterway by refuse can be prevented. SOLUTION: The outlet end of a group of air suction pipes 15 is made to have a projecting shape, and the inside air suction pipe is inserted into a water suction pipe 3 to the lower part thereof in which flow velocity of water becomes fast, and uniform large negative pressure is applied to the outlet end of any of the air suction pipes. And by arranging plural flow guides in the shape of a runner around the inlet end of the water suction pipe 3, water sucked into the water suction pipe 3 is forcibly turned to make the flow velocity in the suction pipe inlet part faster than before and apply larger negative pressure than before to the outlet end of the air suction pipe group 15. And by providing plural flow guides arranged in the shape of a runner around the inlet end of the water suction pipe 3 and a turbulence member provided below the water suction pipe 3, a water flow containing air foam is obtained without using the air suction pipe group 15.</p> |
