Design On Forced Drainage Automatic Control System And The Key Element

The coal mine drainage system is one of the six colliery systems,plays an important role in ensuring the normal construction and production of coal mine.Under the normal condition,the existing drainage system can completely drain away mine inflow in time,but in special conditions,the mine inflow increases suddenly,far beyond the maximum draining capacity of the underground drainage system,then the equipments of underground mine would be flooded.As conventional drainage system consisting of the devices which don't have underwater operation function,especially the drainage gate valve,so drainage system will become paralysis as a result of being submerged,accordingly cause greater safety accidents.First of all,on the basis of the analysis of the use of existing conventional drainage systems and forced drainage systems,this paper put forward to the design criteria on the forced automatic control system and its key element.On the design control modes,the forced automatic control system set the ground remote monitoring system and automatic water drainage system two techniques in one,during the design,control network using computer to monitor the local control system and PLC are proposed and realize of remote control.According to the signal attenuation and interference phenomenon,the design takes certain measures to prevent or reduce the degree of disturbance signal.After the design of the forced automatic control system,the key element of the forced automatic control system,submersible electric hydraulic control valve device was designed.Firstly,the paper designs the gate valve body at the standard of diving 500 meters.According to the working principle of the valve control pipeline and working under water condition,it designs the hydraulic driving system.By the use of water hammer theory,to a depth of 600 meters as an example,calculate the shortest time of opening and closing the designed gate valve,which can weaken or eliminate the water hammer damage,take into account the movement distance of the valve get the average speed extending or retracting of the hydraulic cylinder.The establishment of a three-dimensional model of submarine gate valve by the use of the 3D modeling software Solidworks.The valve casing is analyzed by static analysis using finite element analysis software ANSYS workbench,validate the rationality of the design.The simulation analysis of the hydraulic drive system by using AMESim software,based on the corresponding parameter setting,and the actual kinematic curve is obtained;the simulation analysis of the submersible electric hydraulic control valve is carried by using ADAMS software,after setting the relevant driver and load function,the opening and closing effects which in line with the design requirements of the gate valve.On the basis of theoretical analysis,a submersible gate valve prototype is produced in accordance with the principles and size,and laboratory test was made simulation of mine working conditions in laboratory on the prototype.According to the test,a large number of experimental data is collected,results show that the submersible gate valve device capable of opening and closing valve operation under the water in the control of long distance.Industrial test is carried out on the basis of laboratory test,forced automatic control system could complete the designed function from the test result,each part of the system including the submersible gate valve operates well and achieve the designed goals,so the forced automatic control system and the key element has achieved the conditions of the construction and production of coal mine.