| 摘要 |
PROBLEM TO BE SOLVED: To provide a classifier pump for dredging and a dredging system capable of selectively dredging fine-grained bottom mud.SOLUTION: With the classifier pump 20 for dredging and the dredging system 100, almost no part of horizontal vortex generated by rotation of a rotary blade 26a leaks outside, as the vortex is shielded by a classifier skirt part 28. Therefore, a heavy particle of a large diameter contained in the bottom mud stirred in the classifier skirt part 28 precipitates and is discharged from an opening on a bottom surface. On the other hand, fine-grained and light-weight clay silt is absorbed from a water inlet 25. The bottom mud outside of the classifier skirt part 28 is not agitated unnecessarily because almost no water flowing inside the classifier skirt part 28 leaks outside. Thus, the clay silt contained in the bottom mud may be dredged selectively and efficiently.SELECTED DRAWING: Figure 1 |
