| 摘要 |
PROBLEM TO BE SOLVED: To provide a manhole pump device, having a simple and inexpensive constitution and capable of controlling generation of scum and also breaking the generated scum.SOLUTION: A manhole pump device 10 discharges dirty water flowing into a water storage tank 12 via a discharge pipe 13 connected to a discharge port 22 of an underwater pump 20, and includes a connecting pipe 31 interposed between the discharge port 22 and the discharge pipe 13, and a nozzle 32 freely attachable to and detachable from the connecting pipe 31, and also is provided with a cleaning mechanism 30 configured to be able to constantly discharge a part of dirty water discharged from the underwater pump 20 from the nozzle 32. |
