1 降低输送带安全系数的重要性及根据)输送带，特别是高强度的输送带 在带式输送机投资中所占比例高达30％一50％。合理的选择输送带，降低输送带的投资，一个重要的途径是改善输送带接头技术，以达到降低安全系数。如澳大利亚一条长20kin的输送机，将钢丝绳芯输送带的安全系数，从通常的6．7降为5．0，输送带重量减少14％，承载托辊寿命增加7％，回程托辊寿命增加40％。输送带张力的降低，减少了相应地结构投资，功率消耗下降4％，在20年服务年限可降低投资和运营费约10％。 The importance of reducing the safety factor of the conveyor belt and the conveyor belt, especially the high-intensity conveyer belt in belt conveyor, is up to 30% and 50%. Reasonable selection conveyor belt, lower conveyor belt investment, an important way is to improve the conveyor belt joint technique to achieve the reduction of safety factor. A 20 kin long conveyor such as Australia, the safety factor of the steel cord conveyor belt, from 6.7 to 6.7 normally, conveyor belt, a 14% reduction in weight, bearing roller life increased by 7%, return roller life increased by 40%. The decrease in the tension of the conveyor belt reduces the investment in the structure, the power consumption decreases by 4 percent, and in 20 years the service years can reduce the investment and operating expenses of about 10 percent. 2 国外与国内的规定及存在的问题 Foreign and domestic regulations and existing problems 德国工业标准DIN22101—1982关于钢丝绳芯输送带的安全系数的定义为钢丝绳芯输送带的拉断强度与输送机稳定运行时输送带张力的比值，最小为6．7。而在2002年德国对原1982标准进行了修改，新版标准采用了全新的概念和计算方法。其结论是钢丝绳芯输送带安全系数可小于6．7，最低可取到4I5。近1O多年来。国外一些国家早已突破了1982的规定，德国、英国、新英格兰、澳大利亚等国正在运行的带式输送机，采用4．5 5．5。而根据美国CDI公司等国外机构的研究成果，钢丝绳芯输送带的安全系数可降低到5．5以下，可为4．5～5．0。 German industrial standards DIN22101-1982 about the steel cord conveyor belt safety factor defined as the tensile strength of steel cord conveyor belt with the stable operation of conveyor belt conveyor tension ratio, the minimum is 6.7. In 2002 Germany revised the original 1982 standard, which adopted a new concept and calculation method. The conclusion is that the safety coefficient of the wire rope core conveyor belt is less than 6.7 and the lowest possible is 4I5. Nearly 1O years. Some foreign countries have already broken the rules of 1982, and Germany, Britain, New England, Australia and other countries are running belt conveyor, with 4.5 5.5. However, according to the research results of foreign institutions such as CDI, the safety factor of the wire core conveyor belt can be reduced to 5.5, which can be 4.5 ~ 5.0.