拍门结构与工作原理：
The structure and working principle of the clapping door are as follows:
由阀座、阀板、密土封圈、铰链四部分构成。
It consists of four parts: seat, valve plate, sealing ring and hinge.
仅用于单向水流的圆形和方形出水口，结构严密，工作可靠，无需人力操作启闭力来自
Circular and square outlets for unidirectional flow are compact in structure, reliable in operation, and do not require manpower to operate the opening and closing force.
水源压力，当拍门内的水压大于拍门外侧压力则开启；反之则关闭。
Water pressure, when the water pressure inside the door is greater than the pressure outside the door, opens; otherwise, closes.