What are the functions of a sewer cleaning and suction truck?

[McAva]

Sewer cleaning and suction trucks integrate the functions of flushing, dredging, suction, and reverse discharge. Functions of the suction truck: It is a new type of sanitation vehicle designed for collecting, transferring, and transporting sludge and sewage to avoid secondary pollution. The suction truck can perform self-suction and self-discharge, operates quickly, has a large capacity, and is convenient for transportation. It is suitable for collecting and transporting liquid substances such as feces, slurry, and crude oil. Working principle of the suction truck: Since the suction hose is always submerged below the liquid surface, when the air inside the tank is sucked out and cannot be replenished, it becomes increasingly thinner, resulting in a pressure inside the tank that is lower than atmospheric pressure. Under the effect of atmospheric pressure, the fecal liquid enters the tank through the suction hose. Alternatively, when the siphon pipe is close to the bottom of the tank and air is continuously pumped into the tank without an outlet, it becomes compressed, causing the pressure inside the tank to be higher than atmospheric pressure. Under the effect of compressed air, the fecal liquid is discharged out of the tank through the siphon pipe and suction hose.