PROBLEM TO BE SOLVED: To maintain a water intake quantity at an intake port at a predetermined quantity or less.SOLUTION: The water intake device 1 to be disposed in a water channel to maintain the water intake quantity at the intake port 2 at a predetermined quantity or less includes an intake body 11 having an opening portion 112 disposed on the upstream side of the water channel a valve element 12 capable of opening and closing the opening portion 112 and a movable body 13 connected to the valve element 12 to be vertically movable according to change in water level of the water channel. When the water level of the water channel is a general water level La or less, the valve element 12 is fully opened relative to the opening portion 112 by the dead weight of the movable body 13, and when the water level of the water channel is a set water level Lb or more, the valve element 12 is fully closed relative to the opening portion 112 by the buoyancy of the movable body 13, whereby the opening/closing of the opening portion 112 is adjusted to maintain the water intake quantity at the predetermined quantity or less.COPYRIGHT: (C)2011,JPO&INPIT【課題】 取水口における取水量を所定量以下に保持する。【解決手段】 水路に配置され、取水口2における取水量を所定量以下に保持する取水装置1であって、水路の上流側に開口部112が配設された取水体11と、開口部112を開閉自在な弁体12と、弁体12と連結され、水路の水位の変化に応じて上下方向に移動可能な可動体13と、を備える。水路の水位が通常水位La以下である場合には、可動体13の自重によって弁体12が開口部112に対して全開し、水路の水位が設定水位Lb以上である場合には、可動体13の浮力によって弁体12が開口部112に対して全閉することで、開口部112の開閉を調節し、取水量を所定量以下に保持する。【選択図】 図1
