Principle of siphon drainage pipe:

The simplest device to use the gravity and atmospheric pressure of a liquid to cross a higher obstacle and reach a lower destination. First, place the short wall of the siphon tube filled with liquid in the storage tank, and then open the valve at the outlet of the long arm3The liquid flows out of the tube due to gravity, creating negative pressure at the upper end of the tube, while the liquid in the storage tank flows into the short arm due to atmospheric pressure. In this way, the liquid will continue to flow automatically until the liquid level in the storage tank drops to the inlet of the siphon tube. The method of filling a siphon tube with liquid is mainly manual, but can also be done using a vacuum pump. First, open the valve3and5Close, allowing the liquid to pass through the valve4Lift until both arms are filled. When the liquid rises to the observation hood, close the valve4Open the valve3The siphon tube takes effect, causing the liquid to flow out. If you want to stop conveying, open the valve5By connecting the siphon tube to the atmosphere, there will be no longer any siphon effect.

Purpose:

A siphon tube includes:; The characteristics of siphon hose and spherical airbag are:; Cut the siphon hose from the middle and divide it into two sections. Connect one end of the spherical airbag to one end of the siphon hose, and connect the other end of the spherical airbag to the other end of the siphon hose, so that the spherical airbag is in the middle position of the entire siphon hose. When siphoning, insert one end of the siphon tube into the liquid and bend the other end of the hose outside the liquid to form a closed loop. Pinch the airbag again, and the air inside the hose will escape from the liquid end. After releasing the airbag, the air pressure will naturally press the liquid into the hose, forming a siphon phenomenon. This is not only more convenient than blowing and sucking with the mouth, but also avoids the possibility of touching the hose with the mouth, providing maximum protection for ourselves.

Siphon phenomenon:

The siphon phenomenon is caused by the gravitational force and potential energy difference between liquid molecules, which utilizes the pressure difference of the water column to make water rise and then flow to a lower place. Due to the different atmospheric pressures on the water surface at the pipe mouth, water will flow from the side with higher pressure to the side with lower pressure until the atmospheric pressures on both sides are equal, and the water surface inside the container becomes the same height. The water will stop flowing, and the red suction phenomenon can be used to quickly extract the water from the container.

The siphon is an ancient invention of humans, dating back to BC1In the world, some people have created a peculiar siphon.

In fact, siphoning is not entirely caused by atmospheric pressure, and it can also occur in a vacuum. The force that causes a liquid to rise is the cohesive force between molecules in the liquid. When siphon phenomenon occurs, due to more liquid flowing out of the pipe than into the pipe, the gravity on both sides is unbalanced, so the liquid will continue to flow in one direction. The higher the liquid flows into the pipe, the lower the pressure. If the liquid rises high in the tube, the pressure will decrease to the point where bubbles will form inside the tube(Composed of gases such as air or other components)The height of a siphon tube is determined by the generation of bubbles, as bubbles can cause the liquid to break apart and reduce the force between gas molecules at both ends of the bubble0Thus, the siphon effect is disrupted, so the pipe must be filled with water. Under normal atmospheric pressure, the siphon tube works better than under vacuum because the atmospheric pressure on both sides of the tube increases the pressure inside the entire siphon tube.