Clap the door

A flap door is a one-way opening and closing device installed at the outlet of a drainage pipeline or at the outlet of a channel, river channel, etc.

Structurally, it usually consists of parts such as a door seat, door leaf, hinge shaft, etc.

The working principle is that when the water flows out from the pipeline or channel, the flap door opens under the impact of the water flow; When the water flow stops or flows in the opposite direction, the flap door quickly closes by its own gravity or under the action of water pressure, thereby preventing the water from flowing back.

The main characteristics of a shutter are: simple structure, convenient installation, and low cost; It has less resistance to water flow and relatively better water passing capacity.

It has a wide range of applications in water conservancy engineering, municipal drainage, and other fields, especially suitable for situations with high requirements for anti backflow.

In summary, the flap door is a common and practical hydraulic equipment that plays an important role in ensuring the normal operation of drainage systems and preventing water flow backflow.