双层滚筒输送机同样也具备了滚筒的优点。具有输送量大，维护方便等原因。应用于各行业的成品包装箱、周转箱等输送。要求被输送物的底部是平整的。而且每三只滚筒要与底部接触。

Double drum conveyor also has the advantages of drum. It has a large amount of transportation， convenient maintenance and so on. It is applied to the transportation of finished packing boxes and turnover boxes in various industries. The bottom of the conveyer is required to be flat. And every three rollers should be in contact with the bottom.

同时双层滚筒输送机采用一台电机进行驱动，和独立的两台滚筒线相比，节约了一台电机和电控装置的开支，这样为企业节约了成本，但是要注意在设计时要注意两层滚筒线之间的高度要高于物料的高度。

At the same time， a double layer roller conveyor is driven by a motor. Compared with the two independent  lines， it saves the expenses of an electric motor and electronic  device. This saves the cost for the enterprise， but attention should be paid to the height of the two layers of the roller line when the design is higher than the material.

新式的高速热轧机及连续式热轧机一般都采用单独传动系统。单独传动优点很多，它的制作简单，辊道设备，由于不需要传动齿轮及传动轴，辊道生产商，从而大大简化了辊道的机械结构，使装拆、检修和润滑等问题也都大大简化了，辊道价格，而且对辊子相互位置之准确度的要求也没有集体传动时那样严格。

The new type of high speed hot rolling mill and continuous hot rolling mill generally use a separate transmission system. Individual drive has many advantages，辊道， making it simple， because it does not need the transmission gear and the transmission shaft， which greatly simplifies the mechanical structure of the roller， the assembly and disassembly， maintenance and lubrication problems are greatly simplified， and the accuracy of the location of each roller requirements are not as strict collective transmission.

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