目前我区机电排灌站出水管,多数采用铁皮管埋在出水池壁上,在第一次安装时先安装水泵,待水管安装完,把出水池壁预留孔洞与出水管的空隙用水泥砂浆填塞。经过数年后,出水管烂坏时,要维修更换出水管。因出水管在出水池壁和水泵两端都固定,长度不能伸缩,造成更换水管最后一个接头很难安装,往往漏水,以前采用下列两种办法来解决这个矛盾: At present, the electromechanical irrigation and drainage pumping station in our district discharge pipe, the majority of the use of metal pipe buried in the pool wall, the first installation of the first installation of pumps until the water pipe installation is complete, the pool wall reserved holes and outlet pipe with cement mortar Padded. After a few years, outlet pipe bad, it is necessary to repair the replacement of the outlet pipe. Due to the outlet pipe wall at the outlet and the pump are fixed at both ends, the length can not be extended, resulting in the replacement of the last joint is difficult to install the water pipe, often leaking, the following two ways to solve this conflict before: