The pneumatic shield gate is a new type of hydraulic structure with the advantages of both inflatable rubber dam and steel plate dam. It is composed of a group of shield plates, a group of rubber bladders, a row of foundation anchor bolts and a set of air compression and inflation, the steel gates are raised or lowered through bladders inflation|deflation and control system. According to the principle of and discharging to maintain a specific water level, and can be adjusted at any water level within the design water level and allow the top of the gate to overflow. When the gates are lodging, all the gate bodies lie upside down at the bottom of the river, which can discharge water efficiently without affecting the landscape and navigation. When the gates are closed, they can store water, and when they exceed the set water level, they can form an overflow landscape. It is an advanced, efficient, energy-saving and environment-friendly water conservancy facility. When the pneumatic shield dams collapse in flood waters, the supporting bladders are hidden under the shield plates, floating objects and inclusions in the water pass through the shield plates, the supporting bladders and the accessory system aren't washed and hooked by water flow, the bladders aren't easy to be damaged, and the exhaust time of the dam body is short, so that timely dam collapse can be realized, and the flood safety of the river channel can ensured to a greater extent.

The pneumatic shield gate absorbs the essence of the traditional movable dam type, abandons the shortcomings of the traditional movable dam type, and has the advantages of simple structure and short construction and installation period. The flood control and flood control capacity is outstanding and the operation is safe and reliable. Water passing height and running state are continuously controllable; It has a stronger ability to clean up and remove silt. Water blocking and passing capacity is higher; Short filling and discharging time and simple operation and management; Long service life and high comprehensive benefits; Strong anti-seismic ability and high adaptability to foundation. The landscape effect is good and so on.