| 摘要 |
<p>PROBLEM TO BE SOLVED: To embody a device which does not require the installation of weirs in rivers and for which a power source is not needed. SOLUTION: This device is provided with a pair of aeration cylindrical bodies 1 which are provided with plural holes 2 on their side walls and are arranged under a water surface 13 while lined up in a direction orthogonal with water flow, a pair of arms 5 from which the respective aeration cylindrical bodies 1 are suspended, an air pump 9 of which the piston rod part and cylinder part are pinned respectively to the top end of the respective arms 5 and which is driven by the arms 5 to supply air into the aeration cylindrical bodies 1 and supporting parts 11, 12, 14, 15 which are coupled with both ends of a pair of shafts 16 penetrated with the central parts of the respective arms 5 via bearings 6. The air pump 9 is driven by utilizing the self-excited vibration by the water flow of the aeration cylindrical bodies 1. As a result, the need for a power source is eliminated and the use of the device even in a place where the power source is not available is possible. The device which produces less noises, is low in a running cost, is easy to handle and is capable of well purifying the river is embodied.</p> |
