搅拌车是用来运送建筑用混凝土的专用卡车；由于它的外形，也常被称为田螺车。这类卡车上都装置圆筒型的搅拌筒以运载混合后的混凝土。在运输过程中会始终保持搅拌筒转动，以保证所运载的混凝土不会凝固。运送完混凝土后， 通常都会用水冲洗搅拌筒内部， 防止硬化的混凝土占用空间。
Mixer truck is a special truck used to transport construction concrete; because of its shape, it is often called snail truck. This kind of truck is equipped with cylindrical mixing drum to carry the mixed concrete. During transportation, the mixing drum will always keep rotating to ensure that the concrete will not solidify. After the concrete is transported, the inside of the mixing drum is usually washed with water to prevent the hardened concrete from occupying space.
In the process of using the radiator of automatic feeding mixer, the cooling effect will be affected by corrosion and scaling. Cleaning the radiator and removing scale is an effective way to restore the heat dissipation capacity of the radiator. When the vehicle diesel engine is maintained, the cooling system of the engine must be cleaned. If there is not much scale, it can be washed with water. At this time, the radiator and engine water jacket should be washed separately.
Remove the thermostat in advance, block the bypass hole of the outlet elbow on the cylinder head, and use a special flushing gun to supply water and compressed air at the same time. The direction of flushing water flow should be opposite to that of water circulation when the engine is working. In order to reduce scale, soft water should be added to the cooling system as far as possible; antifreeze should be added to the cooling system as far as possible when it is used at low temperature.
If the radiator of automatic feeding mixer has more scale, chemical detergent should be used for cleaning. That is to say, the scale can be removed by the chemical reaction of acid or alkali substance with scale to produce water-soluble substance. When cleaning, try to use circulation method, that is, first wash with acid solution, and then wash with alkaline solution for neutralization. When cleaning, the descaling agent circulates in the water jacket or radiator of the cylinder block at a certain pressure (generally 10L (PA)) and can be cleaned after 3-5min. When cleaning the radiator, clean the water jacket, radiator solution and cleaning method.