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美国《灌溉时代》,1979年第三期上介绍了一种时针式喷灌机,名曰《纳尔逊》Nelson高效能的喷灌设备。它采用低喷射仰角的喷头、流量控制器及Pcloo末端喷枪,这些设备共同工作,使喷灌机可以在各种不利的田间作业条件下,高效率的工作。据介绍,新设计的各种低仰角喷头,抗风能力强(图1～2),而且在风的影响下,灌到作物上的水有所增多,试验说明,比普通喷头喷洒的水量,约增加10％。另一种新的双咀喷头,不仅可减少能源的消耗,还可减小水滴直径,更有利于土壤入渗。
The United States “irrigation era”, introduced in 1979 the third phase of an hour-type irrigation machine, called “Nelson” Nelson high-performance irrigation equipment. It uses a low jet elevation nozzle, a flow controller and a Pcloo tip gun, all of which work together to make the sprinkler work efficiently under a variety of unfavorable field conditions. According to reports, the newly designed low-elevation nozzle, wind resistance (Figure 1-2), but also under the influence of the wind, irrigation of crops on the water has increased, the test shows that the water spray than the average nozzle, About an increase of 10%. Another new dual nozzle nozzle, not only to reduce energy consumption, but also reduce the diameter of water droplets, more conducive to soil infiltration.