氐压管道输水灌溉是通过田间输水暗管或地面移动管,将水送到灌水沟或畦田进行地面灌溉。管道输水可使水的有效使用率提高20～30％,粮食增产10～20％,且不占用耕地。 管道接头是管道施工的重要工序,它又是保证管道工程质量的关键环节。在管道工程中,对高压管道接头的处理,有一套比较成熟的工艺,能够保证良好的封闭性。然而对内水压小于0.5公斤每平方厘米的低水头扬水站灌区的低压管道接头,往往以为技术要求不高而被忽视。 Pressure pipeline pressure irrigation is through the field of underground pipe or ground tube, the water to the irrigation ditch or 畦 Tian for surface irrigation. Pipeline water can increase the effective use of water by 20 to 30%, grain yield 10 to 20%, and does not take up land. Pipe joints is an important process of pipeline construction, it is also a key link to ensure the quality of pipeline engineering. In the pipeline project, the treatment of high-pressure pipe joints, a set of more mature technology, to ensure good sealing. However, for low-pressure pipe joints in low-head pumping stations with internal hydraulic pressure less than 0.5 kg / cm 2, the low-pressure pipe joints are often overlooked because of their low technical requirements.