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Truck Knowledge - Sprinkler

count:7782014-12-05 13:49:30 FROM: China bus parts,China truck accessories,Engine parts,stuff for truck Suppliers - Ruixiao

新闻摘要: Sprinklers are also known as spray trucks, multi-function sprinklers, landscaping sprinklers, water tankers, and water trucks. Sprinklers are suitable for all kinds of road flushing, trees, green belts, lawn greening, construction of roads, factories and


sprinkler


  Sprinklers are also known as spray trucks, multi-function sprinklers, landscaping sprinklers, water tankers, and water trucks. Sprinklers are suitable for all kinds of road flushing, trees, green belts, lawn greening, construction of roads, factories and mines, and high-rise building flushing. With sprinkler, dust, high and low spray, pesticide spraying, guardrail flushing and other functions.

working principle

  Before the sprinkler works, the liquid in the pump must be higher than the pump shaft. Therefore, an upwardly bent elbow should be connected to the pump inlet and a horizontal pipe and quick connector must be connected. The center line of the quick connector must be 300 mm higher than the centerline of the pump shaft. Import pipeline system must ensure that no air leakage; suction pipe suction head must be immersed in water, so as not to suck air into the water pipe; outlet pipe and pump outlet connection must ensure that the length of straight pipe ≥ 200 mm and then take over the bend.
  The sprinkler pump adopts an external mixed self-priming structure, and an appropriate amount of liquid should be stored in the pump. After the pump is started, the impeller rotates and a negative pressure is formed at the inlet of the impeller. The gas in the suction pipeline is mixed with the liquid in the pump and passes through the pressure chamber to enter the gas-liquid separation chamber. Due to the difference in the specific gravity of the gas and liquid, the gas is separated from the liquid and discharged from the outlet pipe. The liquid sinks in the gas-liquid separation chamber and is circulated repeatedly until the gas in the suction pipe is drained and filled with liquid to complete the self-priming process. The pump started normal infusion.
  The sprinkler pump can function as a suction and pressurization drainer. The self-priming pump can directly inhale the water from the pond into the tank, and can also directly connect the water from the fire hydrant in the city streets and inhale the water in the tank.

●Sprinkler self-priming pump common fault

1, the motor part



  1. No response after power on. Most of them are caused by short-circuiting of power plugs, power outlets, and motor windings.
  2. difficult to start or can not start, and accompanied by "squeak" sound. During inspection and repair, small bamboo strips can be used to rapidly move the blades according to the running direction. If the motor is quickly operated, it indicates that the starting capacitor or start winding is damaged. Replace the capacitor with the same capacity or repair the starting winding. If the motor is issued, the motor and the pump head are mostly. Mechanical failure, such as bearing damage, stuck impeller and so on.
  3. the motor can run, but the speed is slow, and the chassis is overheated, burned odor. Most of them are caused by the short circuit of the motor windings. The motor should be disassembled and repaired by means of welding, jumper wire, isolation, rewinding, etc. depending on the damage.
  4. large noise and vibration during operation. Most of the bearings are damaged or the bearing and the chassis are not properly mated. The motor must be dismantled for inspection. If the bearing is damaged, it should be replaced. If the bearing runs outside the circle, the matching surface of the pump casing can be used to decorate. If the bearing runs in a circle, The wear part of the motor shaft is stenciled, and the wear is serious. The repair is performed by first surfacing after welding. The

2, sprinkler pump head section

  1. The motor runs normally but has little or no water. This situation should first check the sprinkler pump seal, check should first unplug the power plug, hand plug the suction port, fill the water pump, with the mouth to seal the exit and blow in the air, observe the pump head is leaking The leaking point is where the seal is damaged. Common faults include suction pad, outlet pad, and impeller cover pad, which should be replaced during maintenance. If there is no full water phenomenon, most of the impeller is damaged, the water-retaining partition between the water-absorbing chamber and the outlet chamber is worn through, the pump head is covered with water, and the gap between the impeller and the pump casing is increased. The impeller and the pump casing should be replaced. . When replacing the rake wheel, care should be taken to completely remove the remaining copper blades in the pump so as not to damage the new impeller again.
  2. the chassis is charged. Most of them are damaged by water seals. Water penetrates into the motor through the motor shaft and deteriorates the insulation performance of the motor. It can be repaired by replacing the water seal and drying the motor. It should be noted that because the water pump is exposed to water for a long time and it is open to work in the open air, it is vulnerable to moisture and deteriorates the insulation performance. In order to ensure personal safety, the self-priming pump of the electric sprinkler should be reliably grounded.

●User operation guide

1. Requirements for water

  When the sprinkler uses the river ditch or pond as a source of water, pay attention to that all the ends of the suction pipe are not in the water. In order to avoid inhaling stones or more sand and drift debris, the suction pipe end is generally provided with a filtering device, and it is strictly prohibited to remove the filtering device when absorbing water. If the water source is shallow, it is necessary to dig up the water absorption area in advance so as to ensure that it does not contain impurities and air. The water pump requirements for different sprinklers are different. The clean water pump requires no impurities in the water, and the turbid water pump requires no stones and excessive sediment in the water.

2. Add water diversion

  Every time the centrifugal pump absorbs water, a certain amount of water must be added to the pump. After the addition, the water inlet must be closed. When the self-priming pump is used for the first time, it is necessary to add water, and it is unnecessary to add water afterwards.

3. The inlet pipe must be vacuumed

  The water inlet system must maintain a certain degree of vacuum before it can suck water into the tank. Inlet pipe system must be sealed reliably, the hose can not be damaged, the pipe can not have cracks, otherwise it will have a phenomenon of air leakage, it will result in the case of not drinking water.

4. Parking stalls

  Before the water sprinkling vehicle or water sprinkling, the power take-off device must be parked.

5. Winter water release

  Before the advent of winter, the water in the pumps and pipes should be vented to prevent freezing. In northern China, which is generally no longer under construction during the harsh winter season, the water in the pumps and pipes will be drained immediately after construction is completed to prevent future problems.

6. Watering precautions

  The front sprinkler of the sprinkler is located at a low position, close to the ground, the spray pressure is relatively large, and can be used for flushing the road surface; the position of the rear sprinkler is relatively high (the sprinkler is generally installed on the left and right sides of the sprinkler), and the sprinkler surface is wide, and can be used for highway construction and watering. When the rear nozzle is used, the front nozzle should be closed; when using an adjustable nozzle, the width of the sprinkler can be adjusted as needed. The wider the sprinkler width, the less the amount of intermediate overlap and the more uniform the sprinkler density.

7. Lubrication and fastening

  During the process of use, lubrication points of the transmission assembly should be regularly lubricated, and the joints should be tightened frequently to ensure normal operation.

8. Regular sewage

  The water tank of the sprinkler truck is provided with a sewage pipe. The inlet of the pipe is the lowest point of the water tank. After use for a period of time, the discharge pipe switch should be opened regularly to remove the accumulated debris in the tank until the water becomes clear. Daily maintenance and maintenance
(1) Maintenance of automobile chassis and supporting pump shall be carried out according to the corresponding instructions for use.
(2) Before the use of the vehicle, it should be run in accordance with the requirements of the vehicle manual.
(3) When the long-distance transfer is consigned, there should be a fixed anti-skid device around the vehicle, and there should be more than 200mm clearance around the vehicle. If the self-conversion is performed, the front nozzle and rear sprinkler should be removed to prevent loosening.
(4) Check regularly whether there is any clogging in the holes and mouths, and clean up the debris when it is found to be clogged.
(5) After each shift is completed, the oil should be cleaned, the pipelines must be neatly arranged, and the scene should be cleaned up.
(6) If the vehicle is not used for a long time or stored in winter, the remaining water in the tank, the pump and the pipeline shall be drained, and it shall be parked in the carport during storage and wipe clean to avoid exposure to rain and rain.