Belt conveyer have the advantage of the great transporting amount, simple structure, convenient maintaining, part standardization, etc., it is widely applying to the trades, such as mine, metallurgy, coal, etc., expect that, it can be used for transporting the loose supplies or piece article. According to the requirements of transporting technological, it can be transport by single set or the conveyer system that many set make up, thus meet the production line' needs of the different pattern.