Concrete mixer, in order to improve the transportation of cement, avoid the waste of resources formed by bagged cement, now a lot of cement are transported by bulk small concrete mixer, because the small concrete mixer uses pneumatic conveying to discharge, discharge speed and discharge remaining rate are the important objectives of checking the discharge power of cement tank truck. Concrete mixer, how to ensure that the car tank of cement as far as possible to unload, unload, select the correct method is very important. Because the cement in the tank can not be seen directly by naked eyes during the discharging process, it is necessary to distinguish the discharging condition of cement by some methods

压力表查看法，小型混凝土搅拌车在卸料时，罐内空气压力为1.8～2.4公斤/平方厘米，小型混凝土搅拌车卸料快结束时，气压快速下降，假如压力表降到0～0.2公斤/平方厘米之间，则证明罐内水泥根本卸完。

According to the pressure gauge, the air pressure in the tank is 1.8-2.4 kg / cm2 when the small concrete mixer is discharging. When the small concrete mixer is discharging, the air pressure drops rapidly. If the pressure gauge drops to 0-0.2 kg / cm2, it proves that the cement in the tank is completely discharged.

小型混凝土搅拌车卸料时刻判别法，正常水泥罐卸料速度一般为每分种1～1.2吨，假如水泥装载分量为32吨，则一般需求半小时左右卸完，所以能够依据卸料吨位核算卸料时刻，这样前25分钟操作人员比较轻松，没有必要长时刻紧盯压力表或经过其它办法查看是否卸完。

According to the method of judging the discharging time of small concrete mixer, the discharging speed of normal cement tank is generally 1-1.2 tons per minute. If the loading capacity of cement is 32 tons, it usually takes about half an hour to finish discharging. Therefore, the discharging time can be calculated according to the discharging tonnage, which makes it easier for the operators in the first 25 minutes, There is no need to keep a close eye on the pressure gauge for a long time or go through other ways to check whether it has been unloaded.

空压机声响区分法，正常卸料时空压机负载大，空压机作业时宣布的声响比较烦闷，罐体卸料结束时，空压机负载变小，作业声响变得洪亮。混凝土搅拌车

According to the method of distinguishing the sound of air compressor, the load of air compressor is large during normal discharge, and the sound announced during the operation of air compressor is boring. At the end of tank discharge, the load of air compressor becomes smaller and the operation sound becomes loud. Concrete mixer truck

击打罐体法，水泥卸料过程中，能够用手击打小型混凝土搅拌车罐体，假如声响没有回音，则证明罐体内水泥余料较多，还要卸一段时刻；假如罐体有回音，证明罐体内水泥快卸完了。

In the process of cement unloading, the tank of small concrete mixer can be hit by hand. If the sound has no echo, it proves that there is more cement in the tank, and it needs to be unloaded for a period of time; If the tank has an echo, it proves that the cement in the tank is almost discharged.

卸料软管观察法，正常卸料时，卸料软管受流化水泥冲击，软管不断颤动，假如软管不再颤动，也可证明罐内水泥根本卸完。

According to the observation method of discharge hose, during normal discharge, the discharge hose is impacted by fluidizing cement, and the hose vibrates continuously. If the hose no longer vibrates, it can also prove that the cement in the tank is completely discharged.

水泥接纳塔顶扬灰区分法，小型混凝土搅拌车正常卸料时，水泥耗费的气量相对较少，“料多气少”，接纳塔顶扬灰较少，卸料后期“料少气多”，接纳塔顶扬灰增多。

According to the division method of cement receiving tower top ash, when the small concrete mixer truck is discharging normally, the air consumption of cement is relatively less, "more material and less gas", less receiving tower top ash, and "less material and more gas" at the later stage of discharging, more receiving tower top ash.

混凝土搅拌车，以上方法可简略的区分小型混凝土搅拌车水泥是否卸完，各类水泥罐车因为结构不同、选用空压机不同、水泥接纳塔的高度不同，以及所装水泥的比重不同，在卸料速度和剩下率也会有所不同，司机可经过记载实践操作办法和卸料时刻，不断总结经验，取得的操作办法，到达的卸料功率。

For concrete mixer truck, the above methods can briefly distinguish whether the cement of small concrete mixer truck has been unloaded or not. Due to different structures, different air compressors, different heights of cement receiving tower and different proportion of cement, the unloading speed and remaining rate of various cement tank trucks are also different. The driver can record the practical operation method and unloading time, Constantly sum up experience, to achieve the best operation method, to achieve the highest discharge power.

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