| 摘要 |
The present invention relates to a multistage floodgate structure in which multiple floodgates (120) are opened/closed in a terraced system in a deep waterway. To manage this easily by lowering the height of the opened floodgate that is exposed to outside, the present invention comprises: multiple floodgates (120) that have a water turbine blade (124) that is attached to each side to go up and down on a multilevel floodgate track, wherein multiple opening/closing protrusions (111) and a blade track (112) are formed in a terraced system in the waterway in the form of a pier according to the depth of water, and floodgate protrusions (125, 126) are attached to the lower parts or to the lower and upper parts; and a winch device on which the lowest floodgate (122) goes up and down by the rotation and counter-rotation of a threaded shaft (132). Until the floodgate (120) is hung to each independent opening/closing protrusion (111) by the boarding of the lowest floodgate (122), the lower part is supported by a lower floodgate protrusion (126) of a next lower floodgate (121) and the top floodgate (123) is stacked lastly by going up along the blade track (112) and is arrived to a hanger (104), making the waterway open to the level, in which keeping water in store is possible, and lastly, the lowest floodgate (122) is tightly adhered to a water wheel base (102) to close. By controlling the height of opening level of the lowest floodgate (122), it is possible to control water level or passing water volume, and, as the height of exposure is limited to the hanger (104), it can prevent strong wind and waves. |
