Design And Research Of Belt Conveyer’s Front Anti-stacking Coal Mechanical System

Belt conveyor is the most ideal efficient continuous transportation equipment in coal mines,compared with other transportation equipment(such as locomotives),belt conveyors have become the key equipment of coal mining mechanics integration technology and equipment.In the process of underground coal continuous transportation for a long time,especially at the transfer point of the upper and lower belt conveyors,the belt of the transport aircraft is often prone to coal stacking and belt tearing accidents,affecting the normal production and transportation process of the mine,so in view of the above problems,it is proposed to design a device to protect the belt at the transfer point,reduce impact damage,and prevent coal stacking.The main research contents of this article are:1.Briefly analyze the theory of the impact of the falling object at the reloading point and the force of the conveyor belt at the place where the coal pile accident occurs,combined with the design objectives and work requirements,2.Combined with the design objectives and work requirements,an anti-pile device that can be installed in the coal falling position of the lower belt conveyor was designed,and the assembly model was established in Solidworks.The main parts and materials of the device are selected Q235 B and No.45 steel,driven by hydraulic power source,measured by the pressure change caused by coal accumulation,and controlled the action mode by controlling the hydraulic rod expansion and contraction,so as to realize real-time adjustment and prevent accumulation.3.The mechanical characteristics of the equivalent four-rod mechanism of the anti-coal pile device were analyzed,and the equation expression of the relevant mechanical properties was obtained.Using finite element simulation software,the static characteristics of the main structure of the device were analyzed,and the strength and stiffness of the structure were verified to meet the requirements.The fatigue analysis of the action mechanism was carried out,and its reliability during long-term continuous operation was verified.Modal and kinematic characteristics were analyzed to verify that the dynamic characteristics met the requirements.4.In EDEM,the impact simulation experimental environment of the transferred point-falling coal on the lower conveyor belt after passing through the anti-stacking coal structure is established,and the influence of a single factor on the impact effect is studied by the method of controlling the variables to conduct simulation experiments,and the influence of a single performance parameter on the simulation results is preliminarily obtained.Then,Design Expert 12 was used to design the orthogonal experimental protocol,and multiple sets of orthogonal simulation experiments were performed,and the fitting function expression of the impact force of falling coal and the inclination angle,feeding amount and particle size of the receiving skate,and the rationality of the fitting expression was verified by the evaluation indicators such as variance and residuals.