| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a simple and easy closed conduit cleaning method capable of cleaning not only a closed conduit pipe but also a hydrophobic material, and capable of uniformly cleaning the closed conduit pipe even in a piping system having a bending part. <P>SOLUTION: This cleaning method comprises a wash water supply process of supplying wash water 7 to the closed conduit up to storing the wash water 7 overflowed from the closed conduit pipe in a longitudinally long water storage basin 2 arranged so as to turn upward from a closed conduit drain port 90, and a wash water discharge process of discharging the wash water 7 supplied to the closed conduit together with foreign matter by opening a freely openable-closable water discharge port 23 arranged in the water storage basin 2 in a position higher than the close conduit drain port 90. At this time, in the wash water supply process, the wash water 7 is supplied to the closed conduit from a downstream water filling pipe 3 by filling water in the downstream side water filling pipe 3 erected on the side of the water storage basin 2 via a connecting pipe 4, and the connecting pipe 4 is desirably formed as the cleaning method connected to the water storage basin 2 in a position lower than the closed conduit drain port 90. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
