Research On Mine Water Inrush Emergency Drainage Vehicle

In order to meet the social demand for coal consumption,the increasing depth of coal mining is more likely to lead to production safety accidents.Mine water inrush is one of the common sudden and strong safety accidents.At present,the equipment used in coal mine water inrush rescue has many shortcomings,resulting in large workload of rescuers and low efficiency of drainage and rescue.Therefore,it is necessary to develop new mining water inrush emergency drainage equipment to help coal mine water inrush rescue and improve the efficiency of rescue.Determine the overall design scheme of two new mining water inrush emergency rescue equipment,which integrate the walking device,drainage system and lifting device.The mechanical emergency drainage vehicle has simple structure and works by manpower or winch traction;The structure of variable wheelbase emergency drainage vehicle is complex,and the crawler chassis driven by hydraulic pressure is used as the walking mechanism.The modeling and parametric design of two emergency drainage equipment are completed with UG modeling software.The structural design of wheelbase expansion,auxiliary outrigger and lifting device of hydraulic drainage truck is analyzed in detail.The parametric design of the crawler walking mechanism of the hydraulic drainage truck is carried out,and the crawler hydraulic system of the drainage vehicle is designed,which can realize the high-speed and low-speed conversion of the crawler drainage vehicle.The adjustment of the pressure and flow of the hydraulic system by the load sensitive valve during the starting and stopping of the motor and the opening and closing of the reversing valve port of the load sensitive pump is analyzed,which improves the stability of the hydraulic system and reduces the energy consumption of the system.Based on RecurDyn dynamics simulation software,the multi working condition simulation of mine water inrush emergency drainage vehicle with variable wheelbase is carried out.Firstly,the functional relationship between the driving stability of tracked vehicles on slope and the track running process supported by Bekker theory is theoretically analyzed.Then,using the professional track modeling toolkit of RecurDyn,the virtual prototype model of hydraulic drainage truck is established,and the horizontal,30 ° uphill and30 ° downhill roads that meet the roadway ground properties after water inrush in coal mine are established.The dynamic simulation analysis of drainage vehicle under different working conditions is carried out.Through the analysis of the simulation results,it is verified that the hydraulic motor selected for the crawler chassis meets the use requirements,and the variable wheelbase mine water inrush emergency drainage vehicle has good mobility and stability.Especially,there are no accidents such as sliding and longitudinal tipping when running on the slope,and it can operate stably under complex working conditions.Finally,the prototype of mine water inrush emergency drainage vehicle with variable wheelbase is built,and the tests of various road conditions of the drainage vehicle and the lowering and drainage operation of the water pump are carried out in the outdoor simulated coal mine roadway environment.Under various conditions,the operation of the drainage vehicle is stable,and the lowering and hovering of the water pump are stable,which verifies the feasibility of the design.