| 摘要 |
PROBLEM TO BE SOLVED: To provide a sand collecting device where sediment piled on the bottom surface of a sedimentation basin can be efficiently flown without being remained in the vicinity of the side wall of the sedimentation basin in the sand collecting device in the sedimentation basin having a nozzle to flow the sediment piled on the bottom surface of the sedimentation basin by injecting low pressure water.SOLUTION: In a sand collecting device by a low pressure sand collecting system that low pressure water is injected and sediment piled on the bottom surface of the sedimentation basin is flown and collected in a sand collecting pit located at the bottom of the sedimentation basin, a nozzle header is disposed in the vicinity of the side wall of the sedimentation basin and a nozzle having a first pipe part inclining downward to a side wall side, a second pipe part being curved from the tip of the first pipe part below the opposite side of a side wall and a nozzle head disposed continuously at the tip of the second pipe part is attached to the nozzle header. |
