喷嘴结构改造对微喷灌系统喷洒均匀度的影响研究
Study on the Influence of Nozzle Structure Reform on Sprinkling Uniformity of Micro Sprinkler Irrigation System

目的：微喷头的喷洒均匀度与系统的灌溉效果有密切的关系，经常出现漏喷现象而直接影响作物的正常生长，从而导致作物的生长不齐产量降低，该文提出改造喷嘴结构提高喷洒均匀度的方法。方法：根据微喷头的三个参数与喷洒均匀度之间的关系，原森芪喷头与改造喷嘴条件下对喷洒水量进行试验研究。结果：试验结果表明：在无风的条件下，喷头流量受工作压力、喷嘴直径及喷嘴结构的影响，当工作压力和喷嘴直径大时，射程不理想，打击强度大，反之相反；在工作压力稳定的条件下，喷嘴直径及内部结构确定喷洒均匀度结论：森芪喷头经改造喷嘴结构之后，喷洒均匀度明显提高，缩短喷洒时间，并符合多喷头的组合原理。
Objective: The spraying uniformity of micro-nozzle is closely related to the irrigation effect of the system, and leakage and spraying often affect the normal growth of crops, which leads to the uneven growth of crops and the reduction of yield. This paper proposes a method to improve the spraying uniformity by reforming the nozzle structure. Method: According to the relationship between the three parameters of the micro-nozzle and the spraying uniformity, the experimental study on the spraying amount was carried out under the condition of the original Senqi nozzle and the modified nozzle. Result: The experimental results show that under the condition of no wind, the nozzle flow is affected by the working pressure, nozzle diameter and nozzle structure. When the working pres-sure and nozzle diameter are large, the range is not ideal and the impact intensity is large, and vice versa. Under the condition of stable working pressure, the nozzle diameter and internal structure determine the spraying uniformity. Conclusion: After revamping the nozzle structure, the uniformity of senqi nozzle is improved obviously, the spraying time is shortened, and it is in line with the combination principle of multiple nozzles.