The ore of the mining face falls to the heavy apron feeder through the chute and is transferred to the special conveying equipment of the mine. The heavy apron feeder is the key link between the mining and beneficiation system, and is the throat equipment in the mine production. The heavy apron feeder is installed in the lower part of the chute, because the depth of the chute is generally 300-600m, and the chute needs to be often filled with ore, so the equipment must not only withstand the huge pressure of the ore in the chute, but also resist the serious wear of the ore in the chute, its working environment is very harsh: Therefore, the equipment must have the characteristics of very high reliability, simple maintenance and small maintenance, and easy replacement of wearing parts.
The structure of the prior art heavy-duty apron feeder is shown in Figure 1 and 2. It consists of A closed chain belt B wrapped around the drive shaft A and tension shaft C, and materials fall into and are stacked on the taut chain belt B. During operation, the chain belt wrapped around the drive shaft rotates in a single direction by flicking the sprocket on the drive shaft (see "Z") to drive the chain belt movement. Complete material transfer and transfer. The supporting roller D is arranged under the chain plate area bearing the material to support the weight of the material and the chain belt. Due to the limitation of the structure size, the distance between the supporting roller is greater than the pitch of the chain belt. When the chain belt is running, the chain belt is at the level at the fulm of the supporting roller. The chain belt in the bearing section into a wave distribution, in the transmission process will produce impact load, So that the chain belt and chain roller premature damage. The disadvantages of the prior art heavy duty apron feeder are as follows: 1, the transmission is not smooth, easy to produce impact and vibration:
2, easy to wear, maintenance and overhaul workload, high labor intensity;
3, the chain belt is easy to run off, and sometimes it also touches the equipment pillar and foundation, and the chain belt is seriously worn.
The purpose of our improvement is to overcome the defects of the existing technology, provide a heavy-duty apron feeder that can achieve smooth transmission, effectively solve the impact vibration and deviation of the chain in the transmission process, reduce the chain wear, extend the operation cycle, and improve the production efficiency of the equipment. This is achieved by means of the following technical solution: a drive shaft with a sprocket is installed in a fixed axial position, a closed chain belt wrapped around the drive shaft and a tensioning shaft connected by a number of link components with pins, and a chain roller supporting the chain belt, characterized in that: The two sides of each chain component of the chain belt are arranged with a drive chain section, and the middle is fixed with an industrial bearing plate, the drive chain section and the industrial bearing plate are connected with bolts, and the closed chain belt is engaged by the drive chain section and the sprocket of the drive shaft; At both ends of the tensioning shaft, a guide wheel engaged with the chain belt is installed at the corresponding position with the sprocket; The supporting roller is arranged in five rows along the equipment lengthwise. The outer two are the driving chain belt supporting rollers with guard edges, which are arranged under the driving chain link, and the middle three are the smooth bearing chain belt supporting rollers, which are arranged under the supporting type bearing plate. The heavy chain belt rollers are staggered, the middle row is coaxial with the roller with the flange, and the two rows on both sides are coaxial.
Our designed equipment has the following advantages and beneficial effects:
1. Novel design concept, improve the stability of equipment transmission;
2. The chain belt has simple structure, reliable operation, easy maintenance and good guidance, which can eliminate the impact and vibration of the equipment generated by the chain belt operation, and effectively control the deviation and leakage of slag. Reduces wear between parts:
3. The structure is advanced and reasonable, which greatly reduces the maintenance workload and maintenance cost of workers;
4. Improve the production efficiency of the equipment and extend the service life.


The heavy duty apron feeder for smooth transmission consists of a drive shaft and tensioning shaft and a closed chain band wrapped around the drive shaft and tensioning shaft, as well as a drive belt idler and a bearing belt idler supporting the chain belt. The main function of the drive shaft is to support the lead part of the chain and transfer power, and its structure is in the form of sprocket, that is, the sprocket is installed on the shaft and the chain belt is engaged, the sprocket moves the chain belt, and ensures that the chain belt will not slide and shift axially on the shaft. The main function of the tension shaft is to support and tighten the tail of the chain belt to prevent the chain plate from sagging. It is characterized by a guide wheel meshing with the chain belt at both ends of the tension shaft, and corresponding to the sprocket on both sides of the drive shaft, to ensure that the chain belt does not run off when the chain belt is working around the tension shaft device, and the operation is stable and reliable. The chain belt is connected by a number of chain links into a closed structure, the main function is to carry and transport materials, each chain component is arranged on both sides of the drive chain, and the middle of the load-bearing plate with bolts together, the closed chain belt by the drive chain link and the sprocket, the guide wheel mesh, so that the chain belt movement: and the load-bearing plate composed of high-strength load-bearing chain belt for transporting materials. The drive belt roller has a flange and is arranged longitudinally under the drive chain link to prevent the chain from running off: The bearing belt idlers are smooth, vertically installed in the middle of the chain belt, staggered under the supporting bearing plate, the middle row is coaxial with the roller with the retaining edge, and the two columns on both sides are coaxial, and the supporting block is arranged under the bearing plate and the supporting block is in contact with the supporting belt idler, so as to ensure that each link plate has five support points (at least three to four contact points) during operation. The smooth running of the chain belt is realized effectively.