Because concrete is composed of stone, sand, cement and water, if it doesn't rotate and bumps constantly during transportation, the stone will sink to the bottom, the sand is in the middle, and the cement and water are on the top. When it is transported to the destination, there will be caking, which is also what we often call a stuffy tank.

因此，轉動既可以防止混凝土凝固，又可防止混凝土分層，而且還可以讓混凝土混合的更均勻。

Therefore, rotation can not only prevent concrete solidification, but also prevent concrete stratification, but also make concrete mix more evenly.

悶罐

Stuffy tank

相信很多小伙伴都看到過在路邊倒混凝土，好奇的是這也太浪費了吧，這么一車混凝土就不要了嗎？

I believe many friends have seen pouring concrete on the roadside. Curiously, it's too wasteful. Don't you want such a load of concrete?

混凝土攪拌車在運輸過程中，有時候也會出現各種故障或者長時間堵車等情況，這就會讓混凝土凝固在罐體中，出現悶罐現象。

During the transportation of concrete mixer truck, sometimes there will be various faults or traffic jam for a long time, which will make the concrete solidify in the tank and lead to tank stuffing.

出現這種情況后人們也想出了很多辦法，有采用在罐體某個位置切一個洞，然后人工用風鎬將里面的混凝土一點點的清理出來，最后再把開孔焊接封上。

After this situation occurred, people also came up with many methods, including cutting a hole at a certain position of the tank, manually cleaning out the concrete inside with an air pick, and finally welding and sealing the opening.

也有利用破壁機配合水鉆打孔，這樣能夠減少粉塵和沙石飛濺，然后從出料口排出，這種方法效率也較高。

Some also use the wall breaking machine to cooperate with the water drill to drill holes, which can reduce the dust and sand splash, and then discharge it from the discharge port. This method is also more efficient.

還有就是利用熱脹冷縮的方法，即便是罐內被堵住，但罐內還是會有空間，用油燒混凝土后迅速澆水冷卻，混凝土會變脆，這樣也更容易清理

There is also the method of thermal expansion and cold contraction. Even if the tank is blocked, there will still be space in the tank. After burning the concrete with oil, water it quickly for cooling, and the concrete will become brittle, which is easier to clean.

據說國外也有直接用火藥來炸的，但是這是需要專業的人才能操作，而且風險也是很大的，當然了，最省事的辦法就是直接換一個罐體。

It is said that foreign countries also directly use gunpowder to explode, but this requires professional people to operate, and the risk is also great. Of course, the easiest way is to directly change a tank.

清理悶罐的費用根據不同的地方和清理的方法，價格也都不一致，但是最低也要五千以上，有的地方則會達到2萬，還有就是經過清理后的罐體或多或少都有損壞，使用壽命也將變短。

The cost of cleaning the stuffy tank varies according to different places and cleaning methods, but the minimum price is more than 5000, in some places it will reach 20000, and the cleaned tank will be damaged more or less, and the service life will be shorter.

混凝土攪拌車的結構

Structure of concrete mixer

罐體外殼是由非常耐磨的鋼材制成的，為了能夠自動裝卸混凝土，內部還焊有特殊形狀的旋轉葉片，轉動時混泥土會隨著葉片旋轉的方向運動，在不斷的旋轉和翻動過程中讓各種材料充分混合和攪拌。

The tank shell is made of very wear-resistant steel. In order to automatically load and unload the concrete, a rotating blade with special shape is welded inside. When rotating, the concrete will move with the direction of blade rotation, and various materials will be fully mixed and stirred in the process of continuous rotation and turnover.

在進料和運輸過程中罐體正轉，混凝土會隨葉片向里運動，在出料過程中，罐體則會反轉，混凝土沿著葉片向外將卸出。

In the process of feeding and transportation, the tank rotates forward, and the concrete will move inward with the blade. In the process of discharging, the tank will reverse, and the concrete will be discharged outward along the blade.

罐體的旋轉則是靠著卡車上的液壓驅動系統來完成的，通常都是通過卡車上的動力輸出軸帶動液壓泵從而驅動攪拌罐體旋轉的。

The rotation of the tank is completed by the hydraulic drive system on the truck. Usually, the hydraulic pump is driven by the power take-off shaft on the truck to drive the mixing tank to rotate.

我們經常能夠在各種報道中看到關于混凝土攪拌車的各種交通事故，也造成了很多的傷亡，其主要有這些原因，混凝土攪拌車的整個底盤都非常的高，駕駛員在操作過程中就會出現很多的盲區，特別是轉彎的時候。

We can often see various traffic accidents of concrete mixer truck in various reports, which also caused a lot of casualties. These are the main reasons. The whole chassis of concrete mixer truck is very high, and the driver will have a lot of blind spots during operation, especially when turning.

還有就是混凝土攪拌車的速度都普遍較快，加上車身和載有很重的混凝土，制動距離就會變長等，都是造成事故多發的原因。

In addition, the speed of concrete mixer truck is generally fast. In addition, the braking distance will become longer due to the body and heavy concrete, which are the reasons for frequent accidents.

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