The service life of general concrete pipe wells is 20 years. However, many wells have occurred in the process of well pipe disjoint, damage, sandblasting, siltation and other phenomena, so that the well output significantly reduced or completely scrapped. In order to prevent the "short life" of the well, we must pay attention to the following three points: First, find the "short-lived" reasons 1, small opening hole, unqualified construction of gravel, well pipe diameter, gravel layer thickness less than 10 cm or due to gravel The puncture occurred too fast and too fast. The pumping caused excessive sand production in the well. The wells outside the well moved and the hole walls collapsed, causing the well pipe to stagger and rupture. 2. The bottom hole foundation is not solid. The final hole is not drilled to the clay aquifuge. There is no cleaning hole or back hole cement before the lower pipe. The well pipe is not down to the bottom of the hole, etc., which will cause part of the well pipe to subside. 3. Insufficient connection between well pipes Mud wells are not straight, well pipes are not round, lashings are not secure, or sticky mud sticks with poor cementation are used to glue the pipes. After the water is pumped, joints at the well pipes are opened and cracks occur. 4. The filter packing is not scientific Generally speaking, the fine sand layer is used with a larger diameter filter tube or medium coarse sand layer with a smaller particle size filter tube, if the particle size of the filter tube aggregate and the gravel layer, aquifer Improper particle size will result in the well being out of water or too much effluent. Second, standard water pump installation 1, tied cable submersible pump installation, must be in the upper part of the water-saving lift pipe with copper or other corrosion resistant wire rope tied to the cable, but not tied too tight, so as not to damage the cable. 2, to prevent the card pump in the lower pump process, such as the phenomenon of stuck, it should be the well pipe bending or wrong mouth, to remove the pump to re-test, must not force the pump, to avoid causing the pump stuck in the well. 3. If the pumping pipe is connected with a flange, the rubber pad on the surface should be positively attached, and the flanged connecting bolt must be tightened symmetrically and evenly to prevent water leakage and pipe misalignment. 4. Determine the depth of the pump. Determine the distance between the bottom of the well and the bottom of the well in accordance with the siltation of the bottom of the well. Generally, the bottom of the motor is at least 1 m away from the silt layer. The electric pump must not be allowed to run into the well silt. In order to avoid poor heat dissipation to burn out the motor windings. The water level in the well should not be less than 1 meter above the water intake to prevent the intake air from reducing the water output. 5, fill the filter material to the kiln slag, brick, etc. as a filler, because of its poor drainage performance, uneven particle size, loss of anti-caking effect of water, resulting in sandblasting deposit. Third, to strengthen the maintenance 1. Pump maintenance and maintenance In general, the pump should be a small inspection every six months or 1500 hours of operation, annual or 2500 hours of operation should be a large inspection, check the electric pump from the well Out, discharge the water inside the motor, disassemble the water pump and the electric motor, carry out the cleaning descaling, rust removing to all parts; Check the seal ring (the mouth ring), thrust bearing, thrust plate and so on of the consumable part. Severely worn ones should be replaced and re-assembled after cleaning inspection. The joint surfaces and fasteners should be coated with butter during assembly to prevent rusting and affecting the next removal. 2. Maintenance and maintenance of wells As with general machines and appliances, wells must be given reasonable maintenance and repairs in order to ensure their normal operation and prolong their service life. It must not be done once and for all.
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