The design and study of belt conveyor with horizontal curves

1. The purpose and significance
The belt conveyor is the main equipment handling the bulk materials. Belt conveyor is widely used in metallurgy, chemical industry, mining, power plant, ports and other industrial fields. With the development of economy and technology, the belt conveyor develops in the direction of long distance, large volume, high speed. Especially in the mining equipment field, more and more belt conveyors are applying in conveying materials. To reduce the investment cost of forwarding station, the belt conveyor with horizontal curves is designed and manufactured.
2. The development situation of belt conveyor with horizontal curves
According to some statistics, a belt conveyor with horizontal curves was launched to working in Algeria iron mine site in 1970, with length of 2385m, lifting height of 121m, conveying volume of 1000tons per hour. A coal belt conveyor with horizontal curves was launched to working in South Africa in 1978 with length of 3.5 km. After that, France, Austria, Germany, America and other western countries took part in the research and experiment. Especially for France, Germany, they successfully designed many belt conveyor with horizontal curves, receiving good economic benefit.
3. The calculation key point of belt conveyor with horizontal curves
The running resistance coefficient adopts 0.030~0.045. For the present situation of domestic industry, the 0.035~0.040 is suitable. The driver element, tension element, the feeding part must be located in the straightway of belt conveyor. And the calculation of turn radius could adopt the following method.
    R≥〔T1e(α/β)Φ〕/β  （m）
4. Some measures of realizing the horizontal curves of belt conveyor
The conveyor roller should be lifted by fixed angle. This angle is calculated out according to the theoretical formula. However, in the practice, this calculated angle is inaccurate. So we could set the adjustable device to help us adjust the angle in the fixed range. The better device is bayonet type. 

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