What is the Function of a Spraying and Watering Truck?
2 Answers
Watering trucks primarily serve functions such as watering, spraying, dust suppression, and temperature reduction in various environments. They are used for road maintenance, street cleaning, garden irrigation, drought relief, dust and haze control, and transportation of drinking water. Principle of Watering Trucks: A watering truck utilizes the vehicle's engine power to drive the onboard water pump via a power take-off. Water is added to the truck through the inlet or transported from the tank to various spray nozzles through pipelines to achieve different functions. Before the water pump operates, the liquid level inside the pump must be higher than the pump shaft. Therefore, the pump inlet must be connected to an upwardly bent elbow followed by a horizontal pipe and a quick connector. The centerline of the quick connector must be at least 300 mm above the pump shaft centerline. The inlet pipeline system must ensure no air leakage. The suction head of the inlet pipe must be submerged underwater to prevent air from being drawn into the pipe. The outlet pipe must connect to the pump outlet with a straight pipe length of at least 200 mm before connecting to an elbow. Components of a Watering Truck: The water pump adopts an external mixing self-priming structure, and an appropriate amount of liquid must be retained inside the pump. After the pump starts, the impeller rotates, creating a negative pressure at the impeller inlet. The gas in the suction pipeline mixes with the liquid inside the pump and enters the gas-liquid separation chamber through the discharge chamber. Due to the difference in specific gravity between gas and liquid, the gas separates from the liquid and is discharged through the outlet pipe. The liquid sinks in the gas-liquid separation chamber. After multiple cycles, the gas in the suction pipe is completely expelled and replaced with liquid, completing the self-priming process, and the pump begins normal liquid delivery.
I've lived in the city for many years and often see those spray trucks working on the streets. They're mainly used for dust suppression and air purification. When temperatures are high in summer, the water spray helps cool down the road surface and reduces dust dispersion, making breathing much more comfortable. The air quality here used to be terrible - clouds of dust would rise whenever vehicles passed by. Now with these sprinkler trucks operating on schedule, the air quality has genuinely improved. I've also noticed they're sometimes deployed near construction sites to prevent sand and soil from blowing around and affecting pedestrians' health. These vehicles play a significant role in urban cleanliness by reducing road debris, especially effective at washing away mud stuck to the ground after rain. Overall, spray trucks make neighborhood environments more livable and have become common tools in modern city management.
