1.Apron feeders is a kind of chain drive as a traction transport machinery, which is widely used in mining, metallurgy, building materials, coal and environmental protection and other fields, to undertake all kinds of material transfer and transport work, achieving a short distance continuous uniform feed. It is characterized by large feeding capacity, large load torque, and can work under large warehouse pressure. Apron feeders is driven by motor reducer, the sprocket shaft drives the conveyor trough plate. The conveying trough plate carries the material and finally achieves the purpose of conveying the material.Apron feeders can adapt to a variety of environments, it can be work reliably in the open air, humidity, dust and other harsh environment. However, through years of practical use in the field, it is shown that working in a harsh environment at the bottom of the equipment will produce a certain amount of leakage material leakage dust. It is not easy to clean under normal conditions, which will cause a certain loss of output, and seriously hinder the good operation of equipment. So in this case to deal with the leakage of material leakage dust problem is more urgent. The usual way to deal with leaks is to raise the base of the Apron feeders. It can be cleaned manually when the equipment is stopped, which can save the cost. However, the workload of workers is large and the efficiency is low, so the equipment needs to stop running when dealing with the leakage. With the continuous development of China's mining metallurgy, coal and other industries, the demand for production automation continues to increase, it has become the trend of industrial development to ensure the continuity of the production process, reasonable reduction of the workload of workers.

2.Through years of practical experience in production, some practical methods can be obtained. This method can avoid manual cleaning, and can well deal with the leakage of dust and material problems. If the mining technology arrangement is suitable, the method of extending the belt conveyor can be adopted, extend the belt conveyor to the bottom of the equipment, leakage material and leakage dust directly through the belt conveyor to the next process, which can improve the efficiency, not through manual cleaning, so it can reducing the workload. However this method has a higher requirement on the process arrangement, the lower part of the apron feeders shall be provided with the feeder belt. For material humidity viscosity relatively large situation. The material is easy to stick on the groove plate, and the groove plate will remain on it after turning. The material will fall to the lower part of the feeder during the backspace operation, which is not easy to clean. At this point, we can deal with the leakage problem by installing sweeper at the bottom. Add a feeding chute under the front part of the feeder frame, and the scraped material will slip to the crusher or belt conveyor through the chute. However this method is suitable for high humidity and viscosity of materials, the effect is poor for dry or dust-heavy occasions and the baffle of the sweeper needs to be replaced frequently.

3.Both methods have their limitations. According to the requirements of the market and the continuous improvement of product technology, there are two effective and widely used methods, which can well solve the problem of dust leakage and material leakage, and realize automatic cleaning of dust leakage without manual operation. And the two products in the use of the user's recognition, the following two methods are briefly described.
Apron feeders adopts layered structure, the upper structure is "OK" type heavy plate feeder, the lower structure is scraper conveyor. The upper plate feeder is used for conveying materials, and the lower scraper conveyor is used for recycling scattered materials. It is not necessary to start frequently in use. Depending on the situation of materials, it can be opened 2 ~ 3 times per shift. The other layer is also a double-layer structure, the upper layer is a plate feeder, the lower layer is a scraper. The working principle is basically the same, except that the lower layer of the device uses a circular tape machine, The material left behind by the feeder is transferred to the lower part through the tape machine. These two kinds of equipment can well solve the material falling from the apron feeders in the production process, which can ensure the continuity of the production process.