| 摘要 |
A dam structure at an upper stream constructed to prevent water pollution from getting worse is provided to close a water gate securely by eliminating deposit on an insertion groove formed in the middle of a water passage. A dam structure at an upper stream constructed to prevent water pollution from getting worse comprises a dam(10), a water gate(20), and a lifting device(30). The water gate moves up and down on a water path(11) constructed at the dam. The lifting device is installed to lift water gate open. The water path is provided with a guide groove(12) and an insertion groove(13). Two lateral ends of the water gate slides along the guide groove. The bottom of the water gate is inserted into the insertion groove. A depositing groove(14) and a extension groove(15) are formed at two ends of the insertion groove. Each depositing groove and extension groove includes draining holes(14a,15a) which are open toward upper stream and down stream. The am further includes a scrapper(40), a horizontal driving device(50), and an openable block(60). The scrapper slides in the insertion groove. The horizontal driving device is connected to the scrapper. The openable block is inserted in the extension groove. |
