Conveyor Belt

Conveyor Belt Knowledge

Conveyor Belt Knowledge
China is a coal-producing country, accounting for underground conveyor belt with the world. Because China’s coal mine transport conditions are generally poor, the safety belt is particularly important. China from the last century began 80 years to develop and promote the use of rubber conveyor belt, for which the state has issued a MT147.87, MT147-92, MT147-95, MT914-2002 industry standards, and the implementation of three card rubber conveyor belt inspection certificate, safety signs Zhunyong Zheng and production license) management, so that China’s rubber conveyor belt production, use, management gradually standardized and scientific, and effectively ensure the safe use of coal mine conveyor belt. Through 20 years of development, China has become the world’s PVC, PVG-rubber conveyor belt production capacity of the whole fabric of the country’s largest production capacity of up to 80 million square meters. Since the state of the rubber conveyor belt “three card” management, the nation’s coal mine not a single case of fire caused due to conveyor belt accident.

1, China’s gap with foreign rubber conveyor belt china conveyor belt

1. Technical equipment and production technology level is not high, the lower end products. Domestic enterprises, the production of PVC rubber conveyor belt technology has been relatively mature, but the PVG rubber conveyor belt technical level of production is still relatively low. The first is relatively backward and complex production processes, energy consumption, low production efficiency, and because with a body after a serious decline in intensity after the second plastics. The most advanced production technology is used extruder veneer molding process, eliminating the traditional production process of rubber mixing, molding, curing and other flat-panel technology, achieved with a core leaching from the paste, plastic, covering glue together , curing the continuous production, the production efficiency greatly improved. At present, China’s production of the highest strength grade PVC, PVG conveyor belt for 2500N/mm, maximum width of 2000mm, while the intensity of foreign produce 4000N/mm, the entire width of over 3500mm fabric core conveyor belt.

2. Carrying capacity is poor, and short service life. China’s PVC, PVG conveyor belt carrying capacity and service life of most less developed countries, to use the largest 1000S rubber conveyor belt, for example, domestic life of tape is generally not more than 2 years, the cumulative amount of coal is not more than 2 million tons , while the useful life of similar products abroad more than four years, the cumulative amount of more than 6 million tons coal.

3. The lack of core technology and independent innovation capacity is weak. China’s PVC, PVG whole fabric-rubber conveyor belt manufacturers are mostly small and medium enterprises, in addition to foreign investment and joint venture enterprises, only a few large enterprises have the national or provincial tape technology center, a dedicated R & D team, the more perfect experimental equipment and testing instruments, have a certain ability to innovate. The foreign production PVC, PVG rubber conveyor belt manufacturers, mostly world-famous big enterprises have a strong core technology and independent innovation capability, in the manufacture of products, but also the creation of products, manufacturing products of domestic and not the vast majority of enterprises are not allowed to create products .

  Second, the status of the foreign rubber conveyor belt

Underground coal mine conveyor belt is the main tool, due to the traditional rubber conveyor belt was flammable and could not meet the requirements of underground rubber, therefore, the Department of States to prohibit the use of downhole. Rubber conveyor belt rubber and antistatic easy to do, and because with a waterproof, moisture-proof, tear-resistant, light weight, energy consumption, etc., and therefore countries in the world widely coal mine applications. At present, some of the world industrially developed countries in coal mine conveyor belt used in 4000N/mm almost all of the following PVC, PVG rubber conveyor belt, thus the use of particularly large, accounting for almost one-third of the world’s belt use . Among them, British and German production technology and product quality, representing the world’s advanced level. Some industrial developed countries can produce a strength grade of more than 4000N/mm, width more than 3500mm of rubber conveyor belt, the useful life of more than 10 years, can completely replace the steel cord conveyor belt, and because prices, consumption, tear-resistant, occupancy roadway space are, and therefore, than the steel cord conveyor belt more competitive.

Third, the development trend of China’s rubber conveyor belt

 1. High Temperature Resistant Conveyor Belt  Large size, high strength, light weight and longevity of. With the development of the coal industry, a large number of 5 million tons or even more than 10 million tons of large-scale mines coming on stream, large size, high-intensity growing demand for rubber conveyor belt, and especially large mines require the use of even more than 3000mm width greater than 1600mm intensity of more than 2500N/mm even reached 4000N/mm rubber conveyor belt, this conveyor belt carrying a large amount of long distance transport, therefore, require high strength, long service life, must be vulcanized joints; also asked with a thin body, weight light, in order to facilitate investment and savings in energy consumption, a new type of skeleton material must be used in order to meet the requirements.

  2. Energy saving, safety and environmental protection. Energy-saving, safety and environmental protection is the development of the industry trend of conveyor belt, PVC, PVG conveyor belt itself is a kind of energy-saving, safe and environmentally friendly products. Rubber conveyor belt of high strength and long service life, rechargeable hair to play a resource efficiency, thermoplastic elastomer decent rubber conveyor belt production process simple and low energy consumption, high efficiency, and the plastic material can be reused, are in accordance with circular economy, energy saving, safe and environmentally friendly products. Low toxicity, low smoke rubber conveyor belt is more secure and environmentally friendly products.

 3. Talent, technology, market and efficiency to a small number of enterprises are concentrated. China’s current PVC, PVG conveyor belt manufacturers of rubber up more than 80, mostly small businesses, medium-sized enterprises have more than a dozen tape, while the production of similar products abroad, a total of only a dozen or so companies, mostly large enterprises and the world famous brands. In recent years, the domestic market and the effectiveness of rubber conveyor belt is gradually to foreign-funded enterprises and medium-sized enterprises are concentrated. With the entry of foreign-funded enterprises and domestic tape industry, the quality of credit to carry out the activities and the implementation of brand strategy, and effectiveness of such a market to a small number of strong corporate focus is increasingly evident, while in human resources, capital, technology, etc. Patterned Conveyor Belt  are gradually transferred to a small number of strong corporate .

 4. Materials, new technology, production and continuous. Rubber conveyor belt as a whole depends largely on the strength of core material, at present, the domestic as a whole with a core of the latitude and longitude are based on polyester / cotton or nylon / cotton yarn, they have with body thickness, weight, large, low intensity. The general use of foreign as polyester or aramid warp, weft of polyamide and cotton yarn, which with core thin, light weight, high strength. With the high-performance, thin, lightweight development trend of the overall intensity of more than 3000N/mm with aramid core priority should be given to make the warp, it will give the body with thin, light weight, in order to facilitate dipping and plastics so that substantial increase in the strength of conveyor belt, longer life.

 5. Species diversity, use of broad-based. Flame Resistant Conveyor Belt The current domestic PVC, PVG conveyor belt mainly used in underground coal mine. In fact, in addition to other high-temperature materials, it can be adapted to any place under the material handling. Abroad, not only coal mine with a rubber conveyor belt, as well as coal mine on the ground to use general-purpose rubber conveyor belt, and non-coal industry, the use of general-purpose conveyor belt, only coal mine with a rubber conveyor belt rubber more stringent performance requirements only.