2015

The current situation and development trend of typical models of belt conveyors used in coal mines

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1、 Overview of belt conveyors used in coal mines
Belt conveyor is the most ideal efficient connecting transportation equipment in coal mines. Compared with other transportation equipment such as locomotives, it not only has the advantages of long-distance, large capacity, and continuous transportation, but also operates reliably and is easy to achieve automation and centralized control. Especially for high-yield and high-efficiency mines, belt conveyor has become a key equipment for the integration of coal mining electromechanical technology and equipment. With the emergence of high-yield and high-efficiency mines and some special curved tunnels in China, the original belt conveyors can no longer meet the requirements of high yield and efficiency in terms of main parameters and operational performance. They must be developed towards the direction of long-distance, high belt speed, large capacity, and high power large-scale, as well as horizontal bending and multifunctional conveying.
2、The current situation and comparison of domestic and foreign mining belt conveyors for coal mines
At present, the development of belt conveyor technology abroad mainly manifests in two aspects: on the one hand, the diversification of functions and the expansion of application scope of belt conveyors, such as high angle belt conveyors, tubular belt conveyors, spatial turning belt conveyors and other various models; On the other hand, the technology and equipment of belt conveyors have made tremendous progress, especially for large conveyors such as long-distance, high-capacity, and high-speed belts, which have become the main direction of their development.
In recent years, China's coal mine belt conveyors have also made great progress, and gratifying achievements have been made in the research of key technologies and the development of new products. The series of conveyor products continues to increase, from standardized SDJ, SSJ, STJ, DT and other series to various multifunctional and adaptable belt conveyor series for special purposes, such as the national key project - complete set of equipment for large angle belt conveyors, and the "Ninth Five Year Plan" key project - high-yield and high-efficiency working face groove expandable belt conveyors, which have filled the domestic gap. A new series of belt conveyor products for large angle and long-distance transportation of raw coal have been developed, and theoretical research and product development have been carried out on the key technologies and main components of belt conveyors. By applying dynamic analysis technology and intermediate drive and intelligent control technology, various soft start and brake devices and programmable electronic control devices with PLC as the core have been successfully developed. However, compared with foreign countries, their models are generally smaller, especially the belt speed usually does not exceed 5 m/s. They lack practical experience in key technical issues such as high-speed conveyors, dynamic design, and computer monitoring. Due to the generally low belt speed, many design units still use the previous static design method and increase the safety factor of the conveyor belt to improve the reliability of the design. As a result, not only does it increase equipment costs, but it also reduces the reliability of equipment operation. In addition, Chinese conveyor manufacturing enterprises pursue small and comprehensive models, and have not been able to form large-scale specialized production plants or processing centers for components like foreign countries, resulting in ineffective improvement in the design and manufacturing level of components.(Transferred from the internet)

The current situation and development trend of typical models of belt conveyors used in coal mines

永生机械