Development prospects of conveyor belts
production capacity
my country is a big country in the production and consumption of adhesive tapes in the world, and there are hundreds of adhesive tape production enterprises of a certain scale in the country. It is roughly estimated that in 2004, the annual glue consumption (including resin) of the national adhesive tape products was about 100,000 tons, accounting for about 1/3 of the world's adhesive consumption of adhesive tapes, and about 2.5% of the national glue consumption of rubber products. According to the rough statistics of the industry, the annual production capacity of conveyor belts in China is about 250 million m2, and the annual production capacity of V belts is more than 1 billion Am, ranking among the top in the world. According to the statistics of relevant departments, from 2001 to 2004, the output of national conveyor belts was 7246, 7327.52, 8876.21 and 100 million m2 respectively, and the output of V belt was 63700, 65410.45, 76341.2 and 880 million respectively. Am. It is estimated that in 2004, the national production value of tape products was about 6 billion yuan, accounting for about 4% of the national total value of rubber products. According to customs statistics, from 2001 to 2004, the national export delivery value of tape products was 6,300, 6,256, 8,635, and 127,200,000, respectively, and the import was 6,011, 6,200, 10,415, and 119,160,000. It can be seen that the export delivery value of my country's tape products in 2004 has a greater increase than that in 2003, but it is still basically the same as that of imports. In general, my country's tape products are self-sufficient, and the nylon conveyor belts and sidewall conveyor belts produced in my country are exported to all parts of the country. And some are exported, with excess production capacity; on the contrary, due to variety specifications and quality levels, as well as other factors, part of the annual import is required.
Development characteristics
my country's tape industry enterprises are widely distributed and numerous, but relatively concentrated. Almost all provinces, municipalities and autonomous regions in the country have tape production enterprises, and there are hundreds of large and small enterprises; but the tape enterprises are mainly concentrated in Zhejiang, Shandong, Hebei, Henan, Shanghai, Jiangsu, Liaoning, Guangdong and other provinces and cities. In addition, the production volume of the top 10 companies in my country's tape industry accounts for more than 60% of the country's total tape production. For example, according to the statistics of Zhejiang Rubber Industry Association, in 2004 the province's V-belt output reached 450 million Am, accounting for 51.1% of the national total; the conveyor belt output reached 14.06 million m2, accounting for about 14% of the national total. %; the export delivery value of adhesive tape reached 288 million yuan, accounting for about 1/4 of the national adhesive tape export delivery value. The tape industry in Zhejiang Province is concentrated in Ningbo, Shaoxing, Tongxiang, Sanmen, Tiantai and other regions. Another example, according to the statistics of Shandong Rubber Industry Association, in 2004, the output of conveyor belts of enterprises above designated size in the province reached 29.4 million m2, accounting for about 30% of the total output of conveyor belts in the country. According to the investigation of the Pipe and Belt Branch, the conveyor belts in Hebei Province are mainly concentrated in Lixian and Boye areas, with a production capacity of about 50 million m2 and an annual output of 30 million m2.
Quality Status
In the past 20 years, my country's tape products have developed rapidly. Both conveyor belts and transmission belts are relatively complete, and are in line with international standards. In terms of product quality, we pay more attention to adopting international standards and advanced foreign standards in a timely manner. There are more than 30 national standards or industry standards for products. These national or industry standards are basically formulated with reference to international standards or advanced foreign standards.
my country's conveyor belts with synthetic fibers and steel rope cores as the skeleton account for about 80% of the total conveyor belts; the V-belts with wire rope structure have approached 80% of the total V-belts, close to the international advanced level. Since 2003, the state has implemented a production license system for flame-retardant conveyor belts and automobile V-belts, which is a great promotion for the improvement of the quality level of my country's tape products. Flame retardant conveyor belts include four types of flame retardant conveyor belts with fabric cores for coal mines (PVC type and PVG type), steel wire rope core flame retardant conveyor belts for coal mines and general purpose flame retardant conveyor belts. Conveyor belts, etc., the output accounts for about 1/3 of the total output of conveyor belts. Since flame retardant conveyor belts require flame retardant and static electricity, and are used in flammable and explosive places controlled by the state, the technical content of their products is relatively high, and the quality level of this product can represent my country's conveyor belt products to a certain extent. quality level. Automobile V-belts include two types: edge-wrapped automobile V-belts and trimmed automobile V-belts. Due to the relatively severe use conditions of automobile V-belts, it is also a product with high technical content in V-belt products, and its quality is to a certain extent. It can also represent the quality of my country's V-belt products.
upgrade
Li Hong, secretary general of the Pipe and Belt Branch of China Rubber Industry Association, said that the upgrading of conveyor belt products is to develop a layered fabric core conveyor belt and a low-smoke, low-toxicity and flame-retardant conveyor belt that can meet the needs of coal mines. Industrialization of weft core conveyor belts; improve the technical level of new conveyor belts such as tubular conveyor belts and high-angle conveyor belts, and expand market share. The second is to develop new products that are energy-saving, safe and environmentally friendly to replace old products. Lightweight conveyor belt is a fine product in conveyor belt, with less investment, low energy consumption, high technical content and high added value of products. With economic development, scientific and technological progress and the improvement of modernization, the market demand for light-duty conveyor belts is increasing, and users should be guided to pay attention to the use of light-duty conveyor belts. The third is to strengthen the research and development of special-purpose conveyor belts, and further develop large-angle conveyor belts in the form of patterns, sidewalls, baffles, and lifts, as well as intelligent multi-functional anti-tear conveyor belts.
In 2010, the rubber conveyor belt industry will fully implement product upgrading, and at the same time adjust and improve the existing production process, improve the mechanization, automation, continuity and rationality of the process, and the stability of product quality.
Selection criteria
1. The large inclination rib conveyor belt has much higher requirements on the roller than the flat belt. If it is the same type of belt, it is larger than the roller type used by the flat belt.
2. Baseband
The base belt of the corrugated sidewall belt conveyor mainly bears the tensile force, but its lateral rigidity also plays a great role in the performance and effect during use. If the rigidity of the conveyor belt is too small, the conveyor belt will be deformed laterally, causing material scattering and other phenomena. (If you choose CC-56 cotton canvas core layer conveyor belt, the breaking strength is 56N/mm, the number of core layers is at least 6 layers - including 6 layers, the thickness of the upper cover rubber is more than 4.5mm, and the thickness of the lower cover rubber is more than 1.5mm ).
3. The storage and use methods of the large-angle rib conveyor belt are the same as those of ordinary conveyor belts and heat-resistant conveyor belts.
4. Cover belts should be used when the angle of the large-inclined sidewall conveyor belt exceeds 70 degrees.
