The Research And Application Of Automatic Drainage Device Based On PLC

Coal is our country’s primary energy, accounting for more than 70% of the total energy consumption in China. With China’s sustained and stable economic growth, coal will maintain the rapid growth of demand. Mine safety has become an important key problem in coal mining. In the process of coal mining, once the occurrence of water flooding accident, light damage to mechanical and electrical equipment, water flooded roadway, the crisis of life. In the coal mine field research found that the majority of coal mine drainage equipment, technology is relatively backward, low automation, still rely mainly on manual operation to control the start and stop of the drainage pump. The drawbacks and defects of this backward drainage system are self-evident.In order to further promote the progress and development of the wisdom of the mines, this paper now mine exists the defects existing in the low level of automation of drainage technology proposed a intrinsically safe type PLC control of automatic drainage system design and research program based on. The core part of the drainage system for the comprehensive control box and safe operation table. Among them, the integrated control box can be PLC, touch screen, sensor and other power supply, with the circuit over current, overload, leakage and other protective effect, while connecting the external sensors and electric gate valve and other parts of the implementation. The various types of sensor signal acquisition and conversion for intrinsically safe signal output. This type of operation platform for automatic drainage system to control part of the internal intrinsic safety type PLC and touch screen. The drainage system in function can be real-time water monitoring, automatic/manual, local/remote mode of operation of the switch, but also according to the height of the water level, the peak power intelligent control open pump units and start and stop time. The PC to the Century Star software to complete the man-machine interface design, the whole drainage system operation status, data fully display on the touch screen. At the same time, also can be to upload the data, save, print.According to the relevant provisions of 《coal mine safety regulations》 and 《coal mine water prevention and control regulations》 and the actual situation of coal mine, the design of automatic control of drainage system. The work of the design mainly includes the following aspects:The sensor selection scheme, vibration proof and intrinsically safe comprehensive control box of electrical schematic design, intrinsically safe operation platform configuration, control programming, using the configuration of the PC monitor etc.