| 摘要 |
A gravity type automatic powered and non-powered floodgate is provided to allow a worker to open and close in an emergency situation by interconnecting a pair of power/non-power switch valves via an electric hydraulic pump and a flow control valve. A gravity type automatic powered and non-powered floodgate comprises a floodgate, a plurality of floodgate cylinders, a floodgate shutting unit(300), a pair of power/non-power switch valves(500), and an emergency floodgate shutting unit(600). The floodgate that crosses a river, turns around a rotary shaft. The floodgate cylinders are installed between the floodgate and a concrete foundation regularly. The floodgate shutting unit, which is connected with the floodgate cylinders through a liquid line(2), includes a weight cylinder and a piston rod provided with a guide holder. The weight cylinder is connected with the floodgate cylinder via the liquid line. A weight support, which is integrated with the guide holder, supports weights(306). The power/non-power switch valves include first and third ports. The first port is connected with the floodgate cylinder and the weight cylinder. The third port is connected with an input/output unit of an automatic liquid flow control valve. The emergency floodgate shutting unit includes a flow direction control valve(605), which is connected with a second port of the power/non-power switch valve and a pumping port of an electric hydraulic pump(601) through the liquid line. |
