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Browsing by Subject "conveyors"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Sposób sterowania rozruchem ciągu przenośników minimalizujący czas pracy przenośników nieobciążonych
    (Wydawnictwa AGH, 2011) Kołodziejczak, Marcin; Hertel, Leszek
    Spoil transport's efficiency in open-cast mines is very often limited due to technical considerations. Moreover, emergency and planned conveyor lines' standstills occur. Control systems may shorten the starting time of the transport lines and limit the operating time of empty conveyors which result in minimizing the costs of energy usage and increasing of output. In the report the solution, allowing to optimise the conveyors operating time, mutually elaborated and implemented by employers of PGE GiEK Bełchatów Plc. and Merrid Controls Ltd., was presented. Following mechanisms were applied: »Reverse« start-up of the empty conveyors process line in the direction from the excavator to the stacker and the standstill of the process line with the command »standstill with drop«; these procedures allow to minimize the operating time of empty conveyors, and »reverse« start-up additionally enable to accelerate the start of excavator's work; Collective start-up of the conveyors process line and velocity and time start-up; these procedures shorten the time of line conveyors start-up operating with limited efficiency and accelerate the start of excavator's work. For the execution of these solutions tight cooperation of Mine Supervision System with the local automatic on the conveyors is essential. Mine Supervision System possesses required information about all conveyors. This system supports the work of dispatcher who, according to obtained information, decides about the type of start-up or about the process line's standstill. Orders implemented by the dispatcher are processed and transferred by the Mine Supervision System to the selected conveyors. On the basis of this orders local PLC controller carries out most of the tasks autonomously, considering required procedures securing safe work of conveyors.