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出水口是低压管道输水灌溉系统的末级建筑物,其形式和性能的优劣,将直接影响整个灌溉系统的使用效果。升降式出水口是利用低水头压力,克服升降竖管的自重、升降竖管与套管之间的摩擦力、冲土帽上部土体的阻力,推动升降竖管从地面以下30cm处升出地面,进行灌溉。停灌后,在排空输水管道所产生的负压和升降竖管自重的作用下,使出水口(升降竖管)回落到地面以下30cm处。升降式出水口经过室内原型模拟试验和田间应用试验,基本上作到不妨碍机耕,使用方便,性能较好,并可进行工厂化生产。
The water outlet is the final building of the low-pressure pipeline water supply irrigation system, and its form and performance will directly affect the use effect of the entire irrigation system. Lift water outlet is the use of low head pressure to overcome the lifting vertical pipe weight, lifting riser and the friction between the casing, the soil resistance of the upper soil hood, push the riser pipe from the ground 30 cm below the ground rose , Irrigation. After stopping irrigation, under the effect of the negative pressure generated by emptying the water supply pipe and the weight of the vertical pipe, the water outlet (vertical pipe) is lowered to 30cm below the ground. Lift through the prototype indoor outlet prototype simulation test and field trials, basically done without prejudice to plow, easy to use, better performance, and can be factory-produced.