Drag conveyor, secured to the use of the drag chain series chain conveyor material in the horizontal direction or inclined conveyor, into a monolithic steel hinge conveyor belts as traction and bearing member having a bearing surface opposed lateral septum in the groove box drive belts by septa scrape coal transport out. It consists of a drive mechanism, tensioning device, consisting of the traction chain, slats, and bend wheel drive, chassis and other components. In other industrial sectors metallurgy, coal, chemical, electrical, mechanical manufacturing and the national economy have been widely used. A wide range of applications. In addition to the viscosity of the material is particularly large, it is generally a solid material and can use it to transport parts thereof; 2, large transmission capacity; 3, high traction chain of strength, can be used as long-distance transmission; 4, transmission line layout flexibility. Compared with the net conveyor, drag conveyor may be used at a large inclination angle and the smaller bend radius conveyor, so arranged greater flexibility. Slat conveyor inclination up to 30 ° -35 °, bending radius generally about 5-8m; 5, in the delivery process can be classified, drying, cooling or assembly, and other processing technology; 6, smooth and reliable operation;