| Citation: |
ZHANG Hongyu，LI Junxia，SONG Jiahui，et al. Research on joint strength of steel cord conveyor belt and preformed core rubber technology[J]. Coal Science and Technology，2024，52（4）：336−345. DOI: 10.12438/cst.2022-1014
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Steel cord core conveyor belt is a traction and carrying component of belt conveyor, and joint failure is the main cause of steel cord core conveyor belt failure. In order to improve the joint strength and vulcanization efficiency of the conveyor belt, this paper proposes a preformed core rubber laying technology based on the existing joint vulcanization process. Taking the ST1 600 steel cord core conveyor belt joint as the research object, the application of this technology is theoretically analyzed and experimentally studied. Firstly, the mechanical model of the conveyor belt joint is established and stress analysis is conducted. The influence of uneven horizontal and vertical spacing of steel cords on the joint strength is studied using ANSYS Workbench software. Then, a preformed core rubber laying method is proposed, and the effect of filling core rubber and triangular, trapezoidal, and semicircular core rubber grooves on limiting the offset of steel cords is compared through fluid-solid coupling analysis of core rubber. Finally, the influence of this technology on the adhesive strength of the conveyor belt, joint vulcanization efficiency, and joint strength is studied through joint preformed core rubber vulcanization experiments. The research shows that the stress of steel cords at the conveyor belt joint is related to their longitudinal displacement. Due to the inability to achieve uniform distribution of steel cords in traditional joint vulcanization operations, uneven stress of steel cords is caused, which affects the joint strength. The change of horizontal spacing of steel cords compared to vertical spacing has a more significant effect on the equivalent stress of steel cords, which is more likely to cause the failure of joint steel cords. The preformed core rubber laying technology can effectively reduce the offset of steel cords, among which the semicircular core rubber groove has the best effect, reducing by 70% in the horizontal direction and 86.9% in the vertical direction. Under the same vulcanization conditions, compared with filling core rubber, the adhesive strength after vulcanization of triangular, trapezoidal, and semicircular core rubber grooves increased by 1.91%, −3.51%, and 2.48%, respectively, with the best combination with semicircular core rubber. The preformed core rubber technology with semicircular core rubber groove laying can reduce the working time by 70% while concurrently boosting the joint strength of the vulcanized conveyor belt by 5.74%. The research findings can offer both theoretical and practical insights for streamlining joint enhancements.
| [1] |
蒋卫良,王兴茹,刘 冰,等. 煤矿智能化连续运输系统关键技术研究[J]. 煤炭科学技术,2020,48(7):134−142.
JIANG Weiliang,WANG Xingru,LIU Bing,et al. Study on key technology of coal mine intelligent continuous transportation[J]. Coal Science and Technology,2020,48(7):134−142.
|
| [2] |
康红普,王国法,王双明,等. 煤炭行业高质量发展研究[J]. 中国工程科学,2021,23(5):130−138. doi: 10.15302/J-SSCAE-2021.05.016
KANG Hongpu,WANG Guofa,WANG Shuangming,et al. High-quality development of China’s coal industry[J]. Strategic Study of CAE,2021,23(5):130−138. doi: 10.15302/J-SSCAE-2021.05.016
|
| [3] |
国家统计局能源统计司. 中国能源统计年鉴-2020,2020[M]. 北京:中国统计出版社,2021.
|
| [4] |
KONECKI K,WOJTKOWIAK D,TALAŚKA K, et al. Conventional selection of mechanical fasteners for flat belts[J]. Applied Sciences,2021,11(7):2916.
|
| [5] |
王国法. 煤矿智能化最新技术进展与问题探讨[J]. 煤炭科学技术,2022,50(1):1−27.
WANG Guofa. New technological progress of coal mine intelligence and its problems[J]. Coal Science and Technology,2022,50(1):1−27.
|
| [6] |
LONG Xinyu,LI Xianguo,SHEN Zhenqian,et al. Analysis of strength factors of steel cord conveyor belt splices based on the FEM[J]. Advances in Materials Science and Engineering,2019,2019(2):1−9.
|
| [7] |
BAJDA M,BLAZEJ R,HARDYGÓRA M. Impact of selected parameters on the fatigue strength of splices on multiply textile conveyor belts[J]. Earth and Environmental Science,2016,44(5):052021.
|
| [8] |
HE J,HUANG B Y,WANG L,et al. Enhancing natural rubber tearing strength by mixing ultra-high molecular weight polyethylene short fibers[J]. Polymers,2023,15(7):1768. doi: 10.3390/polym15071768
|
| [9] |
STEVEN R B,BROWN H C. Preformed strip and method for splicing conveyor belts[P]. USA:US6689247,2004-02-10.
|
| [10] |
KAJI M,FARAHANI M,ANSARI M. A reinforcing technique for the adhesive bonded composite joints using metallic wires[J]. Journal of Adhesion Science and Technology,2017,31(17):1963−1975. doi: 10.1080/01694243.2017.1290573
|
| [11] |
杜占虎,李永亮. 一种钢丝绳芯输送带接头预制胶片 [P]. 中国:ZL209291286U,2019-08-23.
|
| [12] |
刘鸣宇. 钢丝绳芯输送带接头硫化加热系统研究[D]. 太原:太原理工大学,2021
LIU Mingyu. Research on vulcanization heating system for steel cord core conveyor belt joints[D]. Taiyuan:Taiyuan University of Technology,2021.
|
| [13] |
申立芳. 钢丝绳芯输送带钢丝绳抽动的有限元分析[D]. 天津:天津工业大学,2018
SHEN Lifang. Finite element analysis of wire rope twitching of wire rope core conveyor belt[D]. Tianjin:Tianjin Polytechnic University,2018.
|
| [14] |
吴 震,王 颖. 基于ANSYS Workbench液压支架整架有限元分析[J]. 煤矿机械,2009,30(9):106−108.
WU Zhen,WANG Ying. Finite element analysis of hydraulic support frame based on ANSYS Workbench[J]. Coal Mining Machinery,2009,30(9):106−108.
|
| [15] |
GHOREISHY M H R. A state-of-the-art review on the mathematical modeling and computer simulation of rubber vulcanization process[J]. Iranian Polymer Journal,2016,25(1):89−109. doi: 10.1007/s13726-015-0405-5
|
| [16] |
李晓森. 基于有限元法的钢丝绳芯输送带接头的研究[D]. 沈阳:东北大学,2008
LI Xiaosen. Belt conveyor steel cord splice research based on finite element method[D]. Shenyang:Northeastern University,2008.
|
| [17] |
郭 飞,张兆想,宋 炜,等. 橡胶硫化过程数值模拟研究进展[J]. 化工学报,2020,71(8):3393−3402.
GUO Fei,ZHANG Zhaoxiang,SONG Wei,et al. Research progress in numerical simulation of rubber vulcanization[J]. CIESC Journal,2020,71(8):3393−3402.
|
| [18] |
刘立波,李军霞,张弘玉,等. 带式输送机输送带接头用胶硫化特性研究[J]. 煤矿机械,2020,41(4):30−32.
LIU Libo,LI Junxia,ZHANG Hongyu,et al. Study on vulcanization properties of rubber for belt joint of belt conveyor[J]. Coal Mine Machinery,2020,41(4):30−32.
|
| [19] |
方志坚. 钢丝绳芯胶带热硫化胶接工艺的改进[J]. 矿业研究与开发,2015,35(1):96−98.
FANG Zhijian. The improvement on heat vulcanizing process of steel core belt[J]. Mining Research and Development,2015,35(1):96−98.
|
| [20] |
SH L T,MARCIN B,ADAM K,et al. Study of the influence of vulcanization process parameters on the adhesion strength of textile-reinforced conveyor belts[J]. Textile Research Journal,2023,93(23/24):5345−5356.
|
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