Unloads the coal and goes up the coal control system in the heat and power plant
Abstract: Unloading coal and the going up coal control system to be a public system comparatively huge in the heat and power plant ,its transport course is accomplishing byes way of the leather belt conveyer ,and the whole system carries the longer ribbon conveyer of distance to be gone here and there and come into contact with by many, this kind of leather belt transport plane gets extensively the use in builing productions such as material, chemical industry, foodstuff, machinery, iron and steel, metallurgy and coal mine etc. The bang﹣bang control owing to the tradition is outmoded and exists multitudinous malpractices, and I adopted PLC to control in the design.
Unloading coal and the going up coal measures should be unloading all to adopt three FX2N’s series of ling company PLCs as controlling the nucleus. PLC that the whole system adopted two tai not to communicate by letter mutually controls 12 tai leather belt machines ,and two tai PLCs set up tow control rooms. PLC of the first control room controls the leather belt machine of 1﹣3, and accomplishes unloading the coal assignment; PLC of the second control room control 4﹣7 and the leather belt machine of 0, among them the leather belt machines of 4﹣7 have two transport threads A and Bs, and accomplish the coal assignment. The whole system control possesses the mono-device and linkages to be controlled selection, route selection and system rising to stop instruction and the trouble warning and installs the proximity switch at all plough coals on the machine, and his is in work or stops the demonstration of state control. Waiting the function, it is convenient that the interlock is controlled. Moreover owing to should unload to be controlled equipment various at coal and going up coal measures all scene, and runs personnel in order to be easy to can understand the equipment operating circumstance at scene in the control room in time. This design was disposed the pilot lamp and was come the display device operating circumstances.
This system adopted PLC to serve control nucleus, and solved the malpractice that the bang﹣bang control of the tradition logic exists basically, and uses to the scene, and can lighten labour intensity that runs personnel, and raises work efficiency and safety economy operating standard.
Keyword: Programmable logic controller Interlock control Bang﹣bang control logic