In the production of coal gangue sintered bricks, apron feeders are widely used in the raw material transportation and preparation system. It is characterized by large transportation capacity, even feeding, but also through the home motor inverter frequency feeding, so as to achieve the non-polar control of feeding. However after years of using, it is found that the stability of apron feeders are still need to be improved. Its specific performance is that the loading plate and bearing shaft in the impact of material deformation easily caused by mechanical accidents. Therefore, this paper discusses the improvement of apron feeders.
Introduction of apron feeders. Apron feeders are a material transport equipment. It is mainly consists of the motor, reducer, drive wheel, guide wheel, loading plate, bearing shaft, trough, chain plate and other parts. When the tank is full of materials, the motor, reducer, driving wheel, chain plate, guide wheel and other driving devices will be used to make the loading plate and bearing shaft circulate, thus driving the material transportation and transshipment. The size of the feed is controlled by frequency conversion and the control of the feed size can also be realized by adding a grid plate above the feed groove.

Discussion on stability of apron feeders. Apron feeders have been widely used in the production of coal gangue sintered brick and its application effect has been recognized, but there are also shortcomings in the apron feeders, the specific performance is that the loading plate and bearing shaft are prone to impact deformation during the loading process. Besides, the wider of the feeder, the more obvious of the deformation. After serious deformation of the loading plate and support shaft, mechanical failures occur frequently, which has brought certain impacts on production. At the same time, it is difficult to deal with the accident when the loading tank is full of materials. The only way to solve the problem is to replace the loading plate and bearing shaft regularly, which is bound to increase the capital investment of the enterprise.
Discussion on the improvement design of apron feeders. The main reason for the mechanical failure caused by severe deformation of the board and load bearing shaft by the impact of materials is that the load bearing plate and load bearing shaft are stressed together and there is no supporting device in the middle part of the board. In order to reduce the mechanical accident and the enterprise capital investment, so that the apron feeders to play its role, it is necessary to make the middle part of the support device design. Therefore after careful research and analysis, the following improvements are made. Firstly, the supporting wheel is added in the middle part of the loader, Secondly, slide and load bearing beam are installed in the frame of the feeder, so that the impact force in the middle of the loading plate can be offset to prevent deformation, which can ensure the stability of apron feeder, thus reducing the possibility of mechanical accidents.