Siphon Siphon principle Siphon principle: that is, first in the connection pipe to create a low-pressure environment, the use of air pressure inside the tube and the high level of liquid liquid surface of the atmospheric pressure of the difference between the air pressure, the liquid will be introduced to the connection pipe, to be liquid through the highest point of the connection pipe, the role of gravity, the high liquid continues to flow into the low level of the liquid containers until the high and low level of liquid level height is the same, the liquid stops flowing. Siphon illustration attached to the picture for the "tube air pressure difference" said, as shown in the figure, due to the two sides of the air pressure is basically the same, the high level of the mouth of the tube due to the depth of the liquid into the surface of the liquid is much lower than the low level of the mouth of the tube into the liquid surface of the depth of the liquid, so from the mouth of the tube, the low level of the mouth of the tube at the pressure is greater than that of the high level of the mouth of the tube at the pressure, but the liquid will still be from the high-level containers flow into the low-level containers. Edit Discovery and application Ancient Chinese application of the siphon principle The Chinese knew how to apply the siphon principle from a very early stage. Application of the siphon principle manufacturing siphon, in ancient China called "note son", "bioti", "thirsty Wu" or "over the mountain dragon ". Thirsty Wu for irrigation appeared at the end of the Eastern Han Dynasty. Ethnic minorities in the southwestern region used a long bamboo pipe bent at the nodes to drink wine, also applying the physical phenomenon of siphoning. In Zeng Gongliang's "General Essentials of Wujing" of the Song Dynasty, it is recorded that a siphon pipe made from a bamboo tube was used to draw spring water blocked by a steep mountain down the mountain. In ancient China, the siphon principle was also applied to make kiki-pipes. The kikiku is a kind of fire extinguisher necessary for defending a city in a war. Su Shi in the Song Dynasty, "Dongpo Zhilin" volume 4, recorded the use of kiki-pipes in the salt wells in Sichuan to suck salt water to the ground. The book contained: bamboo as a tube, "no bottom and the hole on it, hanging a few inches of cooked skin, in and out of the water, the gas from the breath and the opening and closing of the, a tube to the water a few buckets. "The Ming Dynasty's" tree book "also talked about the use of chi tube water to watering saplings, for the siphon principle, ancient China has also been discussed. The North and South Dynasties period of the book "Guan Yinzi - nine medicines" said: "the bottle stored two orifices, with the real water, pouring and diarrhea; closed a water is not down, the cover (gas) does not rise (water) does not fall. Though the well is a thousand feet, the water is drawn from it; if the cover (gas) does not descend, (water) does not rise." A bottle with two small holes can pour out water; if one hole is closed, the pressure of the air outside the other hole will be greater than the pressure of the water in the bottle, and the water will not flow out. Tang Dynasty Wang Bing "Suwen" note, about the physical phenomenon of atmospheric pressure recorded more clearly, Wang Bing said: "virtual tube irrigation full, twisted on the suspension of the water solid not sink, for no rise gas and can not be descended; empty bottle small mouth, ton of irrigation does not enter, for the gas is not out and can not be in." Pointed out that an empty bottle with a small mouth could not be filled with water because the gas in the bottle could not come out. Yu Yan in the Song Dynasty in the "seat on the rotten talk" added the previous discovery, said; "I was young, a Taoist see teach, then dramatically burned pieces of paper into an empty bottle, cover the water in a silver basin in a hurry, the water are gushing into the bottle and the silver bottle clanging sound, cover the fire gas to make it so; and according to the law on the abdomen of the strong man, take it does not fall." Burning paper in an empty bottle, because the fire drove part of the air in the bottle out of the bottle, after the fire is extinguished in the bottle to form a negative pressure, resulting in a certain vacuum, the pressure of the air outside the bottle on the bottle tightly pressed on the human abdomen. If the bottle is placed in water, the water immediately rushes into the bottle. Zhuang Yuanchen in the Ming Dynasty in the "Shujiao Zi - inside" also pointed out that the gourd spoon pressed into the water upside down, the water did not enter the gourd, this is because the gourd has air. Modern use of the siphon principle of the toilet Siphon building use - siphon roof rainwater drainage system In the 1960s, several scientists in Sweden to the principle of siphon applied to modern buildings up, initially solved the building roof rainwater drainage system, then in the early stages of the study, the use of a full-pipe pressure flow system, thus in the pipeline roof rainwater drainage system A major breakthrough was made in the area of piped roof rainwater drainage system. The following domestic emergence of several stages of the siphon brand A, Fastflow company is the original siphon rain drainage company, its full pipe flow of technical ability is the leader of this industry and technology leader, for the vast majority of China's major domestic projects to provide a perfect and reliable full of pipe degree of 100 percent of the drainage program. At the beginning of the company, the production of rainwater buckets in Sweden, no pipe fittings production capacity, only according to the system of positive and negative pressure requirements on the pipe in the global procurement of pipe to meet the standards (procurement also brings a huge cost for the emergence of a mushrooming brand more than the gap). With international BBA certification, the brand price front. Second, Geberit century multinational company, siphon pipe fittings manufacturers, while producing and supplying sanitary ware systems and sanitary ware products. In the country, erected part of the requirements of imported pipe fittings of foreign background of the siphon manufacturers of medium-sized projects, full of pipe degree of more than ninety percent. Dealer system operates in the country. With the international BBA's siphon pipe certification, brand price, such as Fastflow. Third, Taining, the ranking of the first national brands. Is a few senior engineers in Beijing, the technical results of joint research. Taining company to adapt to China's engineering market, strict engineering and construction capacity, and to ensure the success of the lower price into the siphon industry. Relying on their own engineering relations, operation of several major domestic projects, but still lower price requirements of industrial plants, mainly projects, price and Geberit is a big difference, of course, the technical ability is not Geberit, but also has no production capacity of its own. Fourth, Huitong, Geberit Nanjing dealers out of the formation, of course, the Nanjing Municipal Government has given greater support, and given a few provincial certification. Can not give technical evaluation, the price is quite low. Fifth, late, the brand appeared more than enough to let people to remember, the price is low no way to let you believe, and even do not consider the technology, directly sell the required pipe fittings, to the industry caused by the impact of the price is low, but also appeared in the low-price, low-quality engineering, engineering problems and troubles, and even due to the calculation of not in place, resulting in a negative pressure imbalance in the system, the bursting of the pipe and pipe tear of the serious consequences. All strive to get a share of the engineering industry sector, the siphon industry needs higher industry rules and thresholds. Sixth, see the strong competition of low price and no profit margin of construction, resulting in engineering evils. Chinese people are smart, China's engineering industry is the sea. Part of the low-end brand began to look for a way out, the operation of the production of a sister brand: to foreign countries for business manufacturing, it has become a multinational brand in a dignified manner, is still low-level technology, surprisingly, can be successfully short-listed in some of the major domestic projects of the bidding manufacturers, and in its relations with the escort to obtain the project under the winning contract. </SPAN></SPAN>
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