一、问题的提出对喷头的要求,例如水量分布要合理,水滴降落要尽量徐缓、重量要轻、结构要简单等等,其中水量分布尽可能合理的要求具有最重要的意义。对各种喷头或喷灌机按其水量分布进行比较,对于判断它们在农业上的适用性特别有益。因此任何喷头试验都必须计算出在不同的喷嘴直径和工作压力条件下的水量分布。实践中特别感兴趣的是喷 First, the issue put forward the nozzle requirements, such as water distribution to be reasonable, water droplets should be as slow as possible, the weight should be light, the structure should be simple, etc., of which the water distribution as reasonable as possible has the most important significance. Comparing the distribution of the various sprinklers or sprinklers according to their water distribution is particularly useful for judging their agricultural applicability. Therefore, any nozzle test must be calculated at different nozzle diameters and operating pressure conditions of the water distribution. Of particular interest in practice is spray