Deep well pump inspection before installation
1. Drilling well inspection Before the deep well pump goes down, it is checked whether the inner diameter of the well meets the requirement of the external dimension of the well and whether the well pipe is straight or not so as to prevent the unit colliding with the well wall and causing damage. When installing a new well, it is necessary to check whether the well washing quality meets the requirements. The well water can not be cloudy or mixed with debris. The sediment concentration should not exceed 0.01%. Check if the water quality and water temperature match the selection of the electric pump.
2, the unit check Before the unit down, check the fasteners bolts loose phenomenon, the cable has no damage at the motor cavity is filled with water or distilled water, with or without water leakage, check the motor insulation after winding water Shake with a 500V shake the measured value of not less than 40MΩ, cable and motor lead well down shake test should not be less than 500MΩ (single finger joints of water insulation resistance).
3, go down to be measured at any time motor insulation resistance, its value is not low and 40MΩ. 4, submersible pump down to work after driving to observe whether the steering signs and signs consistent. And should be adjusted to start the device, the deep well pump at rated current.
Second, the installation of equipment and tools should be hoisted above the height of 3M, and can withstand the full weight of the unit lifting equipment, should be equipped with tripod, wire rope, pump card, wrench, clamp, file, screwdriver, megger, pressure Table, water level measuring instruments and other tools and meters.
Third, the unit in the well position a full set of units immersed in the well water (see installation diagram), the water level should be higher than the deep well pump inlet 3M, the unit immersed in the static water level of not more than 70M, the bottom of the motor should be higher than the bottom 5M above.