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选型前的准备工作 1.测量井管内径. 2.测量井的实际深度H_井、静水位H_静、水深H_水(图1). 3.收集抽水试验资料或洗井时的记录. 4.检查井筒的垂直情况,检查方法很多,在农村比较简便的方法有: ①灯光检查法:沿井口中心用细绳将手电筒(或电灯泡)徐徐吊入井中,根据灯光与水面的相对位置判断井筒垂直情况.若灯光在水面中心,则井筒正直;若只见灯光,不见水面,则井筒不直;若水面偏离灯光,则井筒略有倾斜. ②圆柱体检查法:将长度约为5米,直径等于泵体最大外径(此值可由说明书查得)的一个圆柱体吊入井中泵体安装位置,若不受阻碍,则认为此井可以
Preparation before the selection 1. Measuring the diameter of the well pipe 2. Measuring the actual depth of the well H_ well, static water level H_ static, water depth H_ water (Figure 1) 3. Collecting pumping test data or wash well Record. 4. Check the vertical wellbore, a lot of inspection methods in rural areas are more simple methods: ① lighting method: the center of the wellhead with a thin rope flashlight (or light bulb) slowly hanging into the well, according to the relative light and water Position to determine the vertical wellbore situation .If the light at the center of the water, the wellbore integrity; if you see the light, not the water, the wellbore is not straight; if the water deviates from the light, the wellbore slightly tilted ② cylindrical examination: the length of about 5 meters, the diameter is equal to the maximum diameter of the pump body (this value can be found by the manual) of a cylinder hanging into the well pump body installation location, if not obstructed, that this well can