Optimization design of throwing device based on TRIZ theory

WANG Cheng-jun1,2, ZHANG Yu-ping2, SHEN Yu-zhe1,2
(1.State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines,
Huainan 232001, China; 2.School of Mechanical Engineering, Anhui University of Science
and Technology, Huainan 232001, China)

Abstract: Aiming at the problems of insufficient working height and low rescue efficiency of external rescue equipment in high-rise building fire, the fire distribution characteristics and rescue difficulties of high-rise building were analyzed, a new type of external rescue system in high-rise building fire was put forward. The cause and effect axis analysis diagram of the throwing device used in the rescue system were established by using TRIZ theory, and the shortcomings of the throwing device were determined. The technical contradictions involved in the system were analyzed and solved by the “principle of contradiction solution”, the design of the rope retractor was optimized with the aid of the “object field model”, which improved the safety of the throwing device. Finally, the stress and deformation of the hook in the throwing device were analyzed and verified with the help of ANSYS/workbench finite element analysis software, and the further optimization scheme was put forward. The results show that the optimized system has the characteristics of rapid rescue, strong environmental adaptability, simple operation and so on. The structure rigidity of the throwing device is high and the design is more reasonable, which provides a reference for the follow-up research of the rescue system.
Key words: high rise building; fire; external rescue; TRIZ; optimization design