Suction trucks are mainly used in the cleaning of septic tanks, sewers and sewers, and are used for cleaning vehicles. They are also known as sprinklers and garbage trucks. They have long been supported by national support policies. , Such vehicles do not need to pay purchase tax. The suction truck is mainly composed of automobile chassis, tanks and manure suction equipment. Common models include: Dongfeng XB, Dongfeng Duolika, Dongfeng 140, Dongfeng 145, Houshuangqiao, Qianqin. Four after eight other models. The composition of the suction truck: oil and water separator, water and gas separator, special vacuum suction manure pump, volume pressure gauge, pipe network system, suction pipe, gravity valve, vacuum tank, connected devices (as feces Window), automatic anti-overflow valve and other components.
Suction truck vacuum pump power from the chassis engine, the engine through the gearbox, power take-off, transmission shaft to the vacuum pump, suction pumping vacuum pump out of the sealed tank air, so that it forms a negative pressure, the use of atmospheric pressure outside the tank will be dirty The object is pressed into the tank through the suction pipe; when the waste is drained, the vacuum pump pumps the atmospheric pressure outside the tank into the tank and uses the air pressure to discharge the contaminants out of the tank (the continuous working time of the vacuum pump generally does not exceed 30 minutes). The order of the air flow in the air path is as follows: When the vacuum is suctioned, the vacuum pump sucks the air with certain humidity in the tank into the water and gas separator, where the water is separated and flows back into the tank. The gas enters the vacuum pump along the pipeline through the four-way valve. The air port is mixed with the lubricating oil in the pump and discharged from the exhaust port through the compression chamber. In particular, the mixture is separated by the primary filter, and the separated oil flows back to the oil pump. The air-fuel mixture is further separated by the air-oil separator, and then enters the cross. The valve vents the atmosphere. Manual operation of the four-way valve can change the direction of the air flow, sucking and discharging freely.
The function of the vacuum suction truck is mainly to use the vacuum pump equipped with the vehicle to suck the wastes such as manure, sewage, sludge slurry and liquids containing minor suspended debris into the tank of the suction truck. The car can achieve self-priming, self-discharging, high working speed, large capacity, convenient transportation, and is suitable for collecting and transporting feces, mud, crude oil and other liquid substances. Therefore, it is necessary to first understand the working principle of the suction pump vacuum pump. The more important work principle is the consideration of the source and stability of the power.
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