Study On Light Weight Explosion Proof Of Mine Rescue Robot

Underground environment is very complex,because of the existence of human factors mine explosion is regrettable.It is of great significance to use mine rescue robot instead of manual to carry out search and rescue for trapped people and effectively reduce human casualties.Explosive gas may be filled in the mine after the disaster,so it is necessary to deal with the mine rescue robot.Most of the explosion-proof types used in mine rescue robots are flameproof explosion-proof.Its large mass,complex structure,large volume and other elements lead to the robot moving in the mine is very difficult.The positive pressure explosion proof is suitable for mine rescue robot because of its simple structure,light weight and easy realization.Mine rescue robot explosion-proof developed by this laboratory is divided into two parts.One part is the positive pressure explosion-proof research on the main body of the robot.Based on the positive pressure explosion-proof shell,the quality of the main body is further reduced through topology optimization,and the other part is the flameproof explosion-proof treatment of the driving motor.The above work is mainly carried out from the following aspects:Firstly,the working environment and explosion conditions of the mine rescue robot under the mine are analyzed,and the explosion-proof grade and explosion-proof standard are determined.According to the function and movement characteristics of the main box of mine rescue robot,the static positive pressure explosion-proof type is selected.The feasibility of applying static positive pressure explosion proof to mine rescue robot is verified by Fick's diffusion law.The built-in explosion-proof system and the explosion-proof shell of the main box of the mine rescue robot are designed.Secondly,the small drive motor flameproof explosion-proof design,design the specific parameters of flameproof motor shell joint,according to the theory of gas explosion intensity,theoretically calculate the minimum design thickness of flameproof motor shell and explosion-proof end cover.Through the finite element analysis,the stress and strain nephogram of the flameproof motor explosion-proof shell is obtained.The analysis of the nephogram verifies that the design of the flameproof motor explosion-proof shell meets the requirements of explosion-proof performance.The finite element model of the original traditional design of the simplified explosion-proof main box is established again,and the static analysis of the original explosion-proof main box is made under four typical working conditions.By comprehensively considering the four working conditions,the cloud map of the main explosion-proof box is optimized,and the optimal material distribution path of the main explosion-proof box is obtained.Finally,the main explosion-proof box was reconstructed geometrically,and the optimized weight loss ratio of the main explosion-proof box reached 40.7%.Then,static analysis of the optimized explosion-proof main box frame under four typical working conditions was carried out to compare the structural performance difference before and after optimization of the explosion-proof main box frame,and then the modal dynamic finite element analysis was carried out.Through the above analysis,it is verified that the strength,stiffness and other indexes of the optimized explosion-proof main box meet the design requirements.Finally,Fluent fluid software is used to simulate and analyze the scavenging and blowing process of the positive pressure explosion-proof main box,and the scavenging and blowing time and scavenging volume of the explosion-proof main box are obtained.Through the simulation of the cloud image,we know whether there is a purging dead Angle inside the motor.Through the optimization of the layout scheme of the intake pipeline,the rationality of the layout of the intake pipeline is verified,and the efficiency of ventilation purging is improved.