AN AUTOMATIC FLOODGATE UTILIZING COUNTER WEIGHT AND DIFFERENCES OF WATER LEVELS BETWEEN INSIDE AND OUTSIDE OF LEVEE

摘要

An apparatus for automatically opening and closing a floodgate is provided to minimize damages caused by flood by measuring differences in water levels between inside and outside levee in real time and rotating a motor in forward and reverse direction for opening and closing the floodgate at right timing. An apparatus for automatically opening and closing a floodgate(111) comprises a motor(211), a band brake(220), a reduction gear, a rotary shaft, a chain belt, a sprocket(123), a floodgate guide rail, a plurality of electronic water level meters(216,217), and a control circuit. The motor is configured to raise and lower the floodgate installed to levee. The band brake is configured to hold the rotary shaft of the motor. The reduction gear reduces RPM of the motor while serving as a force intensifier. The rotary shaft moves the floodgate up and down. The chain belt is installed on left and right sides of the floodgate at opposite ends of the rotary shaft. The sprocket is installed in a central portion of the rotary shaft to deliver output of the reduction gear to the chin belt, having the floodgate hung on its one side, and a counterweight(114) hung on the other side. The floodgate guide rail is projected to the outside. The electronic water level meters are installed to each predetermined position. The control circuit controls each component to automatically open and close the floodgate.