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The spray head is a device that sprays pressure into the air to form water droplets for spray irrigation. Sprinklers and power machines, pumps, pipes, etc. form a complete sprinkler unit or sprinkler system. During irrigation, the irrigation water is sprayed onto the field by the sprinkler. Therefore, whether the sprinkler performs well or not, and whether it is used properly, plays an important role in the technical status of the sprinkler system and the sprinkler system. Due to the many types of nozzles, due to their relatively precise, small outlet holes, they often cause problems and affect work during use. Now we will introduce common failures and elimination methods of several types of nozzles. 1 PY series rocker sprinkler common faults and troubleshooting methods 1.1 nozzle does not reverse: PY series rocker arm sprayer is to rely on rocker arm tail reversal hook knock commutator pendulum to achieve reverse, such as reverse hook fixed If the looseness does not occur, the pendulum will not be knocked, and the nozzle will not reverse. The elimination method is to set the position of the reverse rotation hook and tighten the fixing nut. If it is due to the commutator pendulum block can not be lifted, may be due to commutator spring fatigue or rust corrosion weakened, pendulum block spring hole wear becomes larger or the wrong position or pendulum block and pendulum block friction surface rust resistance increases Caused by the reason. If the commutating spring is not seriously rusted, removing the spring to increase the angle between the two legs can increase the elastic force; if the commutation spring is seriously rusted and the spring force is too poor, it needs to be replaced with new ones. Nylon pendulum blocks are susceptible to water expansion, which results in reduced movement clearance and increased frictional resistance, making it more likely that the pendulum block cannot rise or fall. The elimination method is to wipe off the traces of water and add a little lubricating oil. 1.2 The nozzle is reversed too slowly: The slower speed of the nozzle is caused by the extension of the reverse hook and the too tight rocker spring. If the reversal hook is extended too far, when the reversal hook strikes the pendulum block, the angle of the rocker arm is too large, the energy obtained by the deflector from the water flow will be consumed by the tightening spring, and the force of striking the pendulum block will be reduced. Caused slow reversal. The elimination measure is to shorten the extension of the reversal hook. However, if the rocker spring is too tight, the swing arm will open at a small angle, the knock will be weak, and the reversal will be slow. Remedy is to relax the rocker spring properly. 1.3 The nozzle does not rotate or rotate too slowly: The nozzle does not rotate or rotate too slowly is basically caused by the rocker arm part, rotating part and working pressure three parts. The installation position of the rocker arm, the depth of the deflector into the water, and the tightness of the rocker spring will affect the nozzle not turning or rotating too slowly. The installation position of the rocker arm is the relative position of the deflector and deflector of the director and the centerline of the water flow. If the installation position of the rocker arm is improper, that is, if the front edge of the deflector exceeds the center of the water flow, most of the water flow will be deflected by the deflector, so that the deflector will receive little or no water, and the swing arm angle is too small or not open. When the rocker swings back into the pendulum, the arm loses its power and does not even hit, causing the sprinkler to rotate slowly or not to turn. Conversely, the front edge of the deflector plate is too far away from the centerline of the water flow. Because the deflector is subject to too much water, the energy obtained when the deflector plate enters the water is partially offset by the deflector, although in this case the rocker arm opens at a small angle. However, the percussion force weakened, causing the speed of the nozzle to slow down. The solution is to make the installation position correct. The distance from the front edge of the installed deflector plate to the center of the water flow should be between 0 and 1 mm. If the rubber knock block is smashed or lost, it will cause a change in the rotation speed, and at this time, the knocking block should be replaced. Low depth of the rocker deflector can also cause the speed of the sprinkler to slow down. The reason is that the water flow area of ​​the deflector becomes smaller, and the energy obtained from the water flow also decreases accordingly, resulting in a reduction in the knocking force. The elimination method is to loosen the adjustment screw so that the rocker arm can be lowered to increase the rotation speed. When the rocker arm spring is too loose, on the one hand, the rocker arm angle is large, the knocking frequency is reduced, and on the other hand, the initial velocity of the rocker arm water is reduced, the knocking force is weakened, and the rotation speed of the spray head is slowed down. The solution is to tighten the rocker spring through the spring seat. If the rotating part enters the sediment, rust wears, and the steel ball is lost, it will increase the rotational resistance, causing the nozzle to rotate slowly or not to move. In addition, if the operating pressure of the spray head is too high or too low, the rotation speed will be slowed down.