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China's self-developed belt conveyor has equipped with major domestic engineering capabilities, and has begun to enter the overseas market. Conveyor of the personage inside course of study thinks, from the point of view of the prospects for the development of the domestic market in the future, coal, mining, port and dock industry investment will continue to expand the scale, it will also drive belt conveyor of market demand will continue to increase; the international market, some developing countries is vigorously developing its own industrial base, such as demand of India, Brazil, Southeast Asia, Africa, Latin America and other countries and regions of the belt conveyor is also gradually increased.
It is worth mentioning is that the core part of the belt conveyor specialization division of labor and cooperation will become the inevitable trend of the development of the industry, its market value also gradually highlights, five years after sales from the core components or will reach 120 billion yuan.
The main core components of the belt conveyor include the tensioning device, the brake device and the drive device.. The tension device can guarantee the tension of the roller separating point, prevent the conveyer belt slipping and can compensate the plastic deformation when the belt is over working.. The performance of the tensioning device directly affects the performance of the belt conveyor.. In the last century 40's, the Soviet Union and Japan had already begun to use, while our country used the time of the tensioning device relatively not long, its theoretical research and design method still need to be further perfected.
The development of the tension device in China has experienced a mechanical tensioning, a semi-automatic tension and a fully automatic tension of three stages.. Fully automatic tension mainly refers to the hydraulic pressure controlled tensioning device, can greatly prolong the service life of the conveyor belt.
The domestic industry is still substantial use of mechanical and semi automatic tensioning device, but due to the drawbacks of the two tensioning form, in recent years, market demand gradually to hydraulic automatic tensioning device. From the whole tension device market sales situation, in 2011 China's tight device market sales reached 1646000000 yuan, an increase of 1.09 times in 2007. Is expected to 2015 sales will reach 97000 sets, sales will reach 3444000000 yuan. In addition, the performance of the brake device is the key component of the reliable normal operation and the smooth flexible parking of the inclined belt conveyer..
The domestic and foreign scholars carried on a lot of research to the belt conveyer's brake system. At home, China University of mining and technology, Xi'an University of science and technology, Taiyuan University of technology and Shandong University of science and technology colleges and universities were carried out over years of the theoretical research, and has developed a series of brake products, part of the product technology level is close to or reached the international level.
From the current domestic brake device application, the main power brake, hydraulic brake, hydraulic brake and disc brake and other brake modes. From the point of view of market sales, in 2011 sales reached 40000 units, sales reached 933000000 yuan. Is expected to 2015, China's belt conveyor brake device market capacity will reach 2000000000 yuan, sales will reach 68000 sets. The driving device is the starting device of the belt conveyer, the starting problem is not only related to the use performance of the conveyer, but also the economic benefit of the belt conveyer..
At present, the drive device can be divided into three types according to its properties: electrical speed, hydraulic speed and controllable drive device.. The adjustable speed electric drive device development relatively early, but the technical level relatively low; adjustable speed hydraulic driving device with a soft start function and speed regulation, but limited to the transmission principle and structure, function and performance far unable to meet application requirements.
Controllable driving device is a new technology developed in recent years, it sets of mechanical, electrical and hydraulic technology as a whole, at present China conveyor market more mature application of CST and boss two kinds of controllable starting device, which CST system is relatively high. It can realize to the starting process of the effective control, good control performance, actual start speed curve and ideal start speed curve is very close to, so the dynamic tension is low, but so far failed to achieve the localization of CST systems. As a whole, there is a gap between the technology level of our country and the developed country..
