Fourth, the reproduction point at the location of the material is not as Figure 5 on the conveyor belt run, reproduction point at the location of the material drop on the conveyor belt run has a very big impact, especially in the upper conveyor and this conveyor in the horizontal plane of the projection into the vertical when the impact is even greater. Usually, the relative height of the upper and lower two belts at the transfer point should be considered. The lower the relative height, the greater the horizontal velocity component of the material, the greater the lateral impact on the lower belt Fc, and at the same time the material is difficult to centre. So that the material in the cross-section of the conveyor belt skewed, the horizontal component of the impact force Fc Fy ultimately lead to belt deflection. If the material is deflected to the right side, the belt will deflect to the left side and vice versa.

For the deflection in this case, the relative height of the two conveyors should be increased as much as possible in the design process. In the space constraints of the belt conveyor up and down the funnel, guide trough and other pieces of the form and size should be carefully considered. The general width of the guide trough should be about three-fifths of the width of the belt is more appropriate. In order to reduce or avoid the belt deflection can increase the baffle plate to block the material, change the material's falling direction and position.

Fifth, the problem of the conveyor belt itself, such as the conveyor belt used for a long time, resulting in aging and deformation, edge wear, or the conveyor belt damaged after the re-production of the joint centre is not correct, all of which will make the conveyor belt on both sides of the tension is inconsistent and lead to deflection. In this case, the whole length of the conveyor belt will run to one side, the biggest run in the wrong joints, the only way to deal with the centre of the rubber joints are incorrectly re-produced, the conveyor belt aging and deformation of the replacement of the treatment.

Sixth, the conveyor tensioning device makes the belt tensioning force is not enough, the conveyor belt without load or a small amount of load does not run off, when the load is slightly larger will appear to run off the phenomenon. Tensioning device is to ensure that the conveyor belt always maintains sufficient tension effective device, tension is not enough, the stability of the conveyor belt is very poor, the greater the impact of interference by external forces, and in serious cases will produce slipping phenomenon. For the use of heavy hammer tensioning device belt conveyor can be added to solve the counterweight, but should not add too much, so as not to make the belt to withstand unnecessary excessive tension and reduce the service life of the belt. For the use of spiral tensioning or hydraulic tensioning belt conveyor can be adjusted to increase the tensioning stroke. However, sometimes the tensioning stroke has been insufficient, the belt has a permanent deformation, then the belt can be cut off a section of the re-glued.

Seven, for the design of concave section of the belt conveyor, such as concave section of the radius of curvature is too small, in the start if there is no material on the belt, in the concave section of the interval at the belt will be popped up, when encountered in windy weather will also blow the belt off, therefore, it is best to increase the belt conveyor concave section at the belt pulley to avoid belt popping up or blown off by the wind. Bucket wheel stacker reclaimer of the lower through the conveyor belt in the tail car stacking state will produce a large concave section, where it is most likely to run off. If the lower conveyor organic frame sinking, it will aggravate the conveyor belt vacating range, very easy to run off. Therefore, in the design stage should be used as much as possible to avoid the occurrence of such a concave section of the radius of curvature.

Eight, bidirectional operation of the belt conveyor deflection adjustment, bidirectional operation of the belt conveyor belt deflection adjustment than unidirectional belt conveyor deflection adjustment is relatively difficult, in the specific adjustment should be adjusted in a certain direction, and then adjust the other direction. When adjusting, we should carefully observe the relationship between the belt movement direction and the deflection trend, and adjust one by one. The focus should be placed on the adjustment of the drive roller and redirecting roller, followed by the adjustment of the rollers and the adjustment of the material drop point. At the same time, attention should be paid to the belt in the vulcanisation of the joints should make the belt section length direction of the force is uniform, both sides of the force as far as possible equal.