当机井规划数字和设计井深确定之后,就要进行机泵选型和配套。机泵选型和配套的目的,是为了确保机井正常使用和充分发挥水泵的最高效益,若水泵选配过大,会使机井超量开采,加大地下水流速,发生涌砂,以至造成机井报废;过小则出水量小,不能充分发挥机井效益。机泵选型与配套的原则是:使水泵的流量和扬程,要同机井的设计出水流量和扬程基本相符; When the well planning and design well-defined digital depth, it is necessary to pump selection and support. Pump selection and matching purposes, is to ensure the normal use of wells and give full play to the maximum benefit of the pump, if the pump is too large, will oversize drilling wells, increase groundwater flow rate, the occurrence of sand, resulting in well scrapped If it is too small, the amount of water will be small, and it will not give full play to the efficiency of the shaft. Pump selection and matching principles are: make the pump flow and lift, with the design of the well water flow and lift the basic line;