Which parts of the waterwheel is composed of, what is the role of each

Lanzhou waterwheel is a use of the natural impact of the Yellow River water conservancy facilities, waterwheel width diameter of 16.5 meters, the end of the spokes are equipped with a scraper, scraper installed between the equidistant diagonal hanging rectangular water bucket.

Waterwheel standing on the south bank of the Yellow River, the peak season to use the natural flow of water to boost the rotation; dry season is a cofferdam weir diversion of water, through the weir between the nullahs, the river water self-flow boost.

When the natural impulse of the water flow wheel leaf plate, push the waterwheel rotation, the water bucket will be scooped full of river water, the water will be lifted about 20 meters, such as turning to the top of the empty and then dumped into the wooden trough, a steady stream, into the garden, in order to facilitate irrigation. This kind of water turning through the waterwheel, automatic water irrigation of farmland water conservancy facilities, is the ancient "tap water project".

Expanded information:

One of the waterwheel from

According to the "rewritten Gaolan County Records" records, it is by the Ming Dynasty, Lanzhou Duanjia Tan people Duan Xu created." Continuing to live in the time, the creation of turning the car, upside down to pull the river to irrigate the field, to have ingenuity. Boat river farmers are copied." Duan Xu, word Shaoxian, Ming Jiajing two years into the scholar. He was a learned man who traveled to several provinces in the south, and had many favorable policies.

While he was serving as the royal historian of Yunnan Province, he became interested in the local tube car, so he sent someone to draw a drawing and keep it with him. Later, because he was convicted of sparingly discussing the matter at the court, he was relegated to the position of Chancheng County in Henan Province at a reasonable price, and then moved to the position of governor of Qixian County.

During this period, because of his outstanding political reputation, he was promoted to the Hukuang Counselor, Miyun deputy military preparation. In his later years, he returned to his hometown and devoted himself to the imitation of the waterwheel, which, after many repetitions, finally succeeded in the 35th year of the Jiajing period (A.D. 1556).

In 1556 A.D., Duan Xu drew on the cartridge irrigation technology of Tonghe in Yunnan, and created a waterwheel suitable for local use in Lanzhou. It was first set up on the north bank of the Yellow River outside the present-day Guangwumen Gate. Later, three more waterwheels were set up at the north exit of the present Zhenyuan Road to irrigate more than six hundred acres of vegetable beds and orchards in the neighborhood." The name "Waterwheel Garden" is derived from this place.

Second, the waterwheel features

With the southern keel waterwheel is different, Lanzhou waterwheel looks like a huge ancient wheel. Wheel radius, the large nearly 10 meters, the small also has 5 meters. Can lift water up to 15-18 meters high. The center of the spokes is a hug thick axle, the axle is equipped with two rows of parallel spokes around the periphery, the end of each row of spokes is equipped with a scraper, scraper hanging between the activities of the rectangular water bucket.

Wheels on both sides of the stone dam, its main purpose, one is to fix the bracket set up the waterwheel, the second is to the waterwheel below the collection of river water. Above the waterwheel is a wooden chute set up horizontally. Water flow to push the scraper, driving the waterwheel slowly rotating, the water bucket is scooped full of river water, slowly rising, when rising to the center of the wheel above, the bucket turned down, the water into the wooden trough, from the wooden trough into the aqueduct, and then by the aqueduct into the field.

While its irrigation capacity is very small, but because of the day and night rotating non-stop, from March and April each year when the river rises, to the winter when the water level drops until, a waterwheel, the big water can be watered six or seven hundred acres of farmland, the small can also be watered two to three hundred acres of the land, and does not require other energy, so very popular with farmers, in a fairly long period of history, to become the Yellow River coast of Lanzhou, the only irrigation tool.

Baidu Encyclopedia - Lanzhou Waterwheel