| 摘要 |
PURPOSE:To prevent mud from being deposited on pipe, by allowing a water supply ring and the lower parts of a water collector pipe to be connecting pipes leading to a drain pit and a drain pipe. CONSTITUTION:A water supply ring 9 and the lower parts of a water collector pipe 12 are connected to communicating pipes 18 and 22 which lead to a drain pit 19 or a drain pipe 23. With this construction minute mud suspended in spring water is collected to the bottom of a water supply ring 9 or a water collector pipe 12. The mud flows into the drain pit 19 and the drain pipe 23 through the communicating pipes 18 and 22 and thus it is possible to prevent mud from being deposited on the pipes. |
