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[Chemical Knowledge]：Reveal the principle of duckbill valve: why water does not flow back?

Read： 834 Time：20months ago Source：Transform the World with Simplicity

Duckbill valve is a traditional valve, which is commonly used in the field of water flow control. It can effectively prevent water reflux in the case of unidirectional flow of water. The structure of the duckbill valve is very simple, which is composed of valve body, valve plate, valve clack, armature, connecting rod and other components. So, how does it work?

we need to understand the structure of the duckbill valve. The duckbill valve is composed of valve body, valve plate, valve disc, armature, connecting rod and other components, the most important of which is the valve disc. Valve is the key component of the valve, is a special trapezoidal steel plate, its shape like a duckbill is V-shaped. The top of the valve disc is connected to the connecting rod, and the connecting rod is connected to the valve plate through the armature. When the water flow from upstream to downstream along the pipeline, according to the physical principle, the water flow will follow the V shape of the valve disc to the downstream, then the valve disc will be automatically opened by the force of water pressure, the water flow smoothly through the valve to the downstream.

When the flow direction is reversed, that is, the water flows from downstream to upstream, the water flow will force the valve flap to close upward and the water flow cannot pass through. This is because in the reverse flow state, the water flow will be along the inclined surface of the valve clack together, resulting in the valve clack is squeezed, prompting it to close automatically. At the same time, due to the connection between the valve flap and the armature, the valve plate will form a sealed state after the valve flap is closed, which ensures the unidirectional flow of water and effectively prevents the backflow of water.

In addition, the structure of the duckbill valve also has a certain degree of reliability and wear resistance. Its material is mostly cast iron, brass or stainless steel and other high-strength materials, can withstand high water pressure and flow, and has strong wear resistance and long service life.

In general, the working principle of the duckbill valve is based on the physical principle of water flow and the special design of the structure. Its good one-way flow ability makes it widely used in the field of water flow, especially in the scene with the risk of water reflux, it is an indispensable water control equipment.

Conclusion:

Through the analysis of the principle of duckbill valve, it is not difficult to find that the one-way flow of water can be used skillfully, so as to effectively prevent the purpose of water reflux. At the same time, as a traditional valve equipment, the excellent performance of the duckbill valve also makes it play an important role in modern water control technology. It is hoped that this paper can help readers to better understand the principle of duckbill valve, so as to better apply it to actual production and life.

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