Chinese water truck sprinkler

China has been an agricultural country since ancient times and has achieved remarkable achievements in science and technology related to agriculture. Water conservancy is the most indispensable part of agriculture. Although the governments of the DPRK are committed to building water conservancy projects, both irrigation channels and canals have mobilized large amounts of manpower, material resources, and financial resources for construction. However, most of these channels are distributed in major agricultural areas. As far as the highlands are located far away from irrigation channels and water sources, it is obviously impossible to take care of them. So the Chinese made good use of their wisdom and invented another farming tool, the waterwheel, that can divert water.

Waterwheel pioneer

The earliest folk drowning apparatus was "Jianlan." Zhuangzi. External articles. In the “Heavenly and Earthy chapter,” Zong Zigong traveled to the South, and when he passed through Hanyin on an anti-route journey, he saw an old man carrying hard water and irrigation. He worked twice as often, and he told the old man a labor-saving apparatus. water pulley". Its production method is: "The chisel wood is the machine, the lighter one is the lighter one before the other, and the drowning water is pumped. That is to say, a wooden bar supported on a wooden stand with a drowning water at one end and a heavy weight at one end, like a lever, can save the power of drowning. The initial use of the equipment from the irrigation and irrigation to the orange water can be said to be the precursor to the invention of the waterwheel.

The waterwheels formally recorded in China were only produced during the Eastern Han Dynasty. At the end of the Eastern Han Dynasty, when the Emperor was emperor, he was able to make a "overturned car" and had basic equipment such as wheel axle plates. Another example is that during the Three Kingdoms, Wei Ren Ma Jun also had a roll-over manufacturing ("The Three Kingdoms. Wei Zhi" vol.29 Du Chuan Song Song's note). Regardless of whether the rollover was originally created by the hand of anyone, in short, the formal production of the rollover from the Eastern Han Dynasty to the Three Kingdoms can be regarded as the first phase of the establishment of a Chinese waterwheel.

The development of the water wheel arrived at the time of the Tang and Song dynasties. It has made great progress in the application of wheel axles. It can use water power as a motive force and has made a "cart-wheel truck". The combination of a water tank and a tube can make the low water supply high. Not only is it more effective, it also saves valuable manpower. In the Southern Song Dynasty, Zhang Xiaoxiang praised the poems in the title “Theme of Cannon in the Wall”. “Turn this Dafa round to save the drought. It can be seen that this waterwheel helps the farmer. This is the second phase of the development of waterwheel in China.

In the Yuan and Ming dynasties, the development of axles was more advanced. A water tanker not only has a group of gears, there are up to three groups, and there is a "water overturned car", "cattle overturned car" or "donkey overturned car," can be used interactively according to wind and land. This development makes the use of rollover more effective. Since its incarnation in the Three Kingdoms era of the Eastern Han Dynasty, it has been stalled in the operation of manpower. At this point, the use of hydraulic and animal forces to drive, so that manpower finally liberated from the rollover pedal. At the same time, due to the development of shafts, vertical wheels, recumbent wheels, etc., the original truck driven only by water can make use of animal strength even in areas where the water is less abundant, and contributes. In addition, there is the appearance of "high drum car". The places where the terrain is steeper and unable to open water ponds can also be delivered at low water and high altitude, and have been developed. This is the third phase of the development of waterwheels in China. After the Ming and Ming dynasties, the development of China's waterwheels did not have much outstanding achievements. From the above statement, we can see that the waterwheel has made a great contribution to the development of agriculture in China. It greatly eases the topography constraints on agricultural work and realizes the development of hilly lands and hillside lands. It is not only used for drowning during drought but also drained when there is low water.