In recent years,the automation level of coal mine across the country is on the increase,transporting raw coal from the underground to the ground,more and more important link of coal transportation,the annual output of millions of mine belt conveyor transport capacity is required more and more.China’s modernization of the belt conveyor is generally centralized control,can realize the operations on the ground,underground transportation system unattended,saving personnel can improve safety and economy in the process of transportation,is the inevitable trend of the development of modern coal mine.The centralized control system mainly controls the belt conveyor in the coal mine ground control room,realizes the unattended operation of the underground belt conveyor,and makes the mechanical automation level of the coal mine higher.According to the characteristics of coal mine production process,transported by belt conveyor in coal mine,coal quantity change frequently,but the belt machine must be kept running,resulting in long belt conveyor operation load or a small amount of coal under the state,resulting in a large number of electric energy loss.Therefore,based on the centralized control and the urgent need for transformation of frequency control on the conveyor,belt conveyor to achieve speed automatic adjustment by the coal quantity,automatic speed control to achieve the purpose of energy saving,one of which is the inexorable trend of coal transportation system of mechanical automation development. |