What is an inverted siphon and what does inverted siphon mean?

An inverted siphon is actually a communicator, where water flows underneath an obstacle and takes advantage of the height difference to flow through a closed pipe below. Because it resembles an inverted siphon, it is called an "inverted siphon".

Inverted siphons are often used in hydraulic engineering, such as the small ones that pass under a road, and the large ones that cross the Yellow River in the south-to-north water diversion project.

It's the phenomenon of siphoning, and the principle is that the difference in atmospheric pressure produces a pressure difference.

The siphon phenomenon is caused by the gravitational force and potential energy difference between liquid molecules, that is, the pressure difference between the water column is used to make the water rise and then flow to a low place. Since the nozzle water surface is subjected to different atmospheric pressures, the water will flow from the highest-pressure side to the lower-pressure side, until the atmospheric pressure on both sides is equal, and the water surface in the container becomes the same height, and the water will stop flowing. The red suction phenomenon quickly draws the water out of the container.

The siphon is an ancient invention of human beings, as early as the 1st century BC, someone made a peculiar siphon.

In fact, siphoning is not entirely caused by atmospheric pressure, but can also occur in a vacuum. The force that makes the liquid rise is the cohesive force of the molecules between the liquids. In the event of siphoning, the liquid will continue to flow in one direction because more liquid flows out of the tube than into the tube, and the gravity on both sides is unbalanced.

As the liquid flows into the tube, the higher it goes, the lower the pressure. If the liquid rises from a very high tube, the pressure will be reduced to such a point that bubbles (made up of air or other gases) will be formed in the tube, and the height of the siphon will be determined by the formation of bubbles. Because the bubbles disconnect the liquid, the force between the gas molecules at both ends of the bubble is reduced to 0, thus destroying the siphon effect, so the tube must be filled with water.

At normal atmospheric pressure, the siphon works better than in a vacuum, because the atmospheric pressure on both nozzles increases the pressure inside the entire siphon.

To put it simply, the pressure difference between the two liquid levels will be different from the atmospheric pressure"Push"Liquid movement, like two people pushing each other together, the greater the strength will push, and the smaller force will retreat.

Parhelion is an atmospheric optical phenomenon also known as the solar disadvantage. It is a pair of bright spots or rainbow halos that form on both sides of the sun, and unlike a normal rainbow, an inverted siphon is formed near the ground. Inverted siphons usually occur in cold weather conditions at high latitudes and are caused by ice crystals in the atmosphere.

The process of formation of inverted siphon is due to the refraction and reflection of sunlight as it passes through hexagonal ice crystals in the atmosphere, resulting in bright spots. These ice crystals are usually parallelepiped, causing sunlight to bend as it passes over the ice crystals. When the Sun is above the horizon, sunlight is gradually refracted in the atmosphere, then hits ice crystals, and then refracted and reflected again to form a bright spot.

At the same time, the opposite side of the sun will produce similar bright spots, eventually forming a pair of bright oak spots, and the phenomenon of inverted siphon appears.

The brightness and color of the inverted siphon are related to the properties of the ice crystals in the atmosphere and the angle of the sun. When the ice crystals are hexagonal in shape and at the right angle, inverted siphons may be noticeable and rainbow colors such as red, yellow, green, blue, etc., may appear. Inverted siphons usually appear near the Sun and form a halo that allows for the observation of very spectacular atmospheric phenomena.

When the channel is close to the elevation of the road or ditch and is at a plane intersection, a structure needs to be built to allow water to pass under the road surface or ditch, which is usually called an inverted siphon. Inverted siphons are mainly of the shaft type. This form is easy to construct and easy to remove sediment.

There are two types of inverted siphons: box-shaped and round. Physically, the phenomenon of water going to a high place is a technique of water conservancy engineering. It is a kind of interchange hydraulic structure that is often used when the channel crosses with the road or river, or when the channel crosses the valley.

As early as more than 2,000 years ago, it was successfully used in China. Like the siphon, it is also arched on the façade; The difference is that its bow is bent downward. Moreover, although the principle of water transport is the same as that of the inverted siphon and the siphon, that is, both rely on the difference in water level between the upstream and downstream, the inverted siphon does not need to artificially create a vacuum in the pipe when it starts working, so it is more popular.

When the channel is close to the elevation of the road or ditch and is at a plane intersection, it is necessary to build a structure to make the water pass under the road surface or ditch, which is usually called an inverted siphon.

When the channel is close to the elevation of the road or ditch and is at a plane intersection, it is necessary to build a structure to make water pass under the road surface or ditch, which is usually called an inverted siphon.

A pressure pipe used to transport water through canals, valleys, depressions, and roads. It is commonly used to make reinforced concrete and prestressed reinforced concrete materials, and is also made of concrete and steel pipes, mainly according to the pressure head, pipe diameter and material **. The inverted siphon is composed of three parts: the inlet section, the tube body section, and the outlet section.

Water pressure pipes that pass through canals, ravines, depressions, or roads from the ground or laid above ground. Reinforced concrete pipes or prestressed reinforced concrete pipes are mostly used, and concrete pipes or steel pipes are also used. When the head is low, you can use slurry masonry pipes.