Sprinkler irrigation system common faults and exclusion

First, the correct use of sprinkler system Before use, check whether the vertical pipe is vertical and whether the bracket is stable. The non-perpendicular riser will affect the reliability of the nozzle rotation and the uniformity of the water spray; the mounting of the bracket will be unstable and will be pushed down by the water jet force during operation, damaging the nozzle and damaging the crop. 2. Close the valves on the dry and branch pipes first, and then start the pumps. After the pumps reach the rated speed, open the valves on the main valve and the branch pipes in order to start the pumps under low load to avoid overloading and prevent the pipes from being watered. Hammer caused vibration. 3. Pay attention to monitoring the pressure of various parts of the sprinkler system during operation. The hydraulic loss of the dry pipe should not exceed the economic value; the pressure drop of the branch pipe must not exceed 20% of the maximum pressure of the branch pipe. 4. In the operation, it is necessary to observe whether the irrigation intensity is appropriate at any time and it is required that no runoff water should be generated on the surface of the soil. Otherwise, it indicates that the spray irrigation intensity is high, and the working pressure should be reduced in time or replaced with a nozzle with a smaller diameter to reduce the spray irrigation intensity. 5. The sprinkler uniformity during operation should not be less than 0.8. If the uniformity is poor, it can be compensated by increasing the uniformity of the entire sprinkler. The specific method is: the second sprinkler is arranged between the two nozzles of the first sprinkler, and the position of the sprinkler is the same as the first when the third sprinkler is used. Sprinkler irrigation should be conducted when there is no wind or wind. If it is necessary to spray with wind, the distance between the sprinklers should be reduced, or sprinkler irrigation should be adopted. When the wind reaches level 3 or above, sprinkler irrigation should be stopped. 6. In the sprinkling irrigation operation, it is necessary to prevent the water tongue from spraying on the electric wire and avoid the electric line when moving the pipeline to prevent electric leakage accidents. Second, sprinkler irrigation system maintenance After each sprinkling, the machine, pump, and nozzle should be scrubbed cleanly, and the rotating parts should be promptly oiled and rustproof. In winter, the water in the pump and the pipe should be drained to prevent freezing. 2. When the sprinkler system is not used for a long time, the sprinkler should be disassembled and checked for abnormal wear of the rotating shaft, sleeve shaft, and pad, etc., and the damaged parts can be checked or replaced in time. After the oil is clean, put it on the surface of each piece of oil and install it. The water in the pipe should be drained. The rust-proof peeling should be repaired. After the hose is rinsed clean, it should be dried. After all equipment is maintained, it is stored in a dry warehouse. 3. There are many types of sprinkler head failures and excluding spray nozzles. The following describes the common failures and removal methods of rocker arms and worm gear nozzles. 3.1 Abnormal water tongue performance If the rotary nozzle is working properly, the water tongue should have a smooth, transparent, round, dense section near the exit nozzle when it is blocked (rocker type water deflector or worm wheel impeller). After the dense section, the water tongue gradually turned white and was crushed; its range should not be less than 85% of the standard value, and the atomization was good. Otherwise, the water tongue trait is abnormal. Its manifestation is: 3.1.1 Water tongue just left the nozzle, the surface is rough and opaque, but the water tongue is still round in the mainstream. The reason is that the nozzles are rough, burr or damaged. The nozzle should be polished or the nozzle replaced. 3.1.2 The water tongue spreads as soon as it leaves the nozzle. There is no round solid section. Main reasons: 1 The internal damage of the nozzle is serious. Should be replaced; 2 rectifier distortion. Should be repaired or replaced; 3 foreign matter within the flow channel blockage. Foreign matter should be removed. 3.2 water tongue traits can still but not enough range. 3.2.1 The range is not enough, but the water tongue is fine. The main reason is that the nozzle speed is too fast. Should reduce the nozzle speed. 3.2.2 The range is not enough, and the water tongue is also poorly atomized. The reason is that the work pressure is not enough. Increase pressure as required. 3.3 The rocker arm rotates abnormally. 3.3.1 The rocker works normally, but the nozzle does not turn or rotate slowly. The reasons are as follows: (1) The clearance between the hollow shaft and the sleeve shaft should increase the clearance; (2) The silt between the two is blocked. Should be removed and cleaned; 3 the sleeve shaft is tightened too tightly during installation. Should relax properly. 3.3.2 Rocker angle angle school because: 1 rocker spring pressure is too tight. Should be properly loosened; 2 rocker installed too high, different water device can not fully cut into the water tongue. Should be lowered; 3 rocker arm and rocker shaft too tight. Should increase the gap; 4 lack of water pressure. The water pressure should be increased. 3.3.3 rocker angle is large enough, but the tapping is weak. The reason is that the deflector incises the tongue so deeply that the force of the rocker arm is not completely hit by the spray body but is flushed. The knock block should be thickened. 3.3.4 rock hammer knock rate is not stable, suddenly fast. The reason is loose rocker arm and shaft or loose rocker arm shaft. The cause should be corrected. 3.3.5 Rocker thrown off cannot return. The main reason is that the rocker spring is too loose. The spring should be tightened. 3.4 The worm gear (impeller) nozzle rotates abnormally. 3.4.1 impeller idle, but the nozzle does not turn. Main reasons: 1 The connecting screws between the impeller shaft and the small worm wheel loosen or the pins fall off. Should be tightened; Locating screws between 2 large worm wheel and sleeve shaft are loose. Should be tightened; 3 reversing gear ride up. The reversing lever should be pulled to catch the gear. 3.4.2 The water tongue is normal, but the impeller does not turn and the spray does not turn. Main reasons: 1 The worm gear or gear lacks oil and the resistance is too large. Lubrication should be added; 2 The set screw is too tight, causing the large worm gear to produce eccentricity. Should be properly loosened; 3 impeller stuck by foreign objects. Should be cleared; 4 worm gear, gear or hollow shaft and sleeve shaft rust. Should be replenished after rust filling. 3.5 nozzle rotating part of the leak. 3.5.1 Enter the sediment in the gasket so that the sealing surface is not sealed. The hollow shaft should be removed and cleaned. 3.5.2 The processing precision of the nozzle is not enough, and the end face of the hollow shaft and the sleeve shaft can not be closely matched. Should be repaired or replaced.

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