Prototype Experiment And Structure Design Of Crawler-Style Remote Control Wind Fire Extinguisher

Nowadays with the rapid development of technology and economy, there is a growing emphasis on environmental protection. Forest and grassland constitute an important component of ecological environment, however, the frequent occurrence of fires constantly threatens forest and grassland ecosystems. States attach great importance to the work of fire prevention and fire suppression, and strongly support the research work related to fire-fighting equipments. In our country, forest and grassland fire fighting equipments are mainly portable pneumatic extinguishers and large fire-fighting truck. The former has the advantage of environment protection and energy, but fitness and endurance of the operator require extremely high levels, and there are some safety problems; The latter has a high efficiency, but when putting out the medium and low intensity fires if using large fire fighting truck will cause a waste of resources, in addition to the high production cost of fire fighting trucks. Therefore, in order to reduce the labor intensity of fire fighter and further improve security and economy, as well as the efficiency of fire fighting work, a new type of high-efficiency wind extinguisher needs to be designed.This paper researches deeply on the formation and spread of the forest fire and fire fighting principles and methods, and analyses working principle and structure forms of existing wind fire extinguishers, eventually, determines that the appropriate wind fire extinguisher for forest fire fighting is the form of remote control. On this basis, the paper presents the structural composition and layout form of the crawler-style remote wind fire extinguisher, defines its working principle, and determines power distribution system and transmission structure combined with working conditions.On the basis of market research and theoretical analysis, this article carries out reasonable structural design and layout for walking system, remote control system, double-fan system, and its intermediate transmission mechanism and extinguishers racks. To solve the problem of overload and the presence safety hazard for firefighters, one kind of wind fire extinguisher which can be controlled remotely and suit for forest fire fighting work in our country is designed, not only breaking the existing wind extinguisher defects, but also realizing the possibility of remote control fire fighting.On the basis of theoretical research, after completing the structural design of the crawler-style remote wind fire extinguisher, this paper makes the necessary finite element analysis of its important parts, including the common structural static analysis and modal analysis. Through the static strength analysis, we got the maximum strain, stress and displacement of corresponding parts and components, to test and verify its strength and stiffness; Through modal analysis, we got low orders natural frequencies and vibration mode of the corresponding parts and components, to verify the stability of the machine movement, and then verify the whole structure reasonableness of the crawler-style remote wind fire extinguisher. Thus, a rational structure verification of its important parts is completed.In Solidworks software environment to build a three-dimensional model of the crawler-style remote wind fire extinguisher, conducted a motion simulation combined with motion analysis module, in order to verify its structural design is reasonable. After verifying reasonable of the structural design, then the trial prototype of the crawler-style remote wind fire extinguisher will be produced, and through prototype experiment to test whether its ability meets the design requirements.