Research on intelligent control system for air volume of local ventilator in tunneling working face
In order to improve the stability of air supply of the local ventilator in the tunneling working face,the flow field characteristics of airflow distribution in the tunneling roadway were analyzed and studied.Then,the field environment information was collected by the CO,CH4,temperature and humidity sensors installed in the underground roadway to give feedback to the central processor of the PLC centralized control system in real time.The fan blade speed wouldde automatically adjusted by the frequency converter installed in the ventilator to increase the air supply volume,dilute the toxic and harmful gases,reduce the dust mass concentration,and compensate the air resistance loss,which effectively ensured the air volume allocation and balanced the air supply during the tunneling operation of the working face,and improved the reliability and stability of the ventilation system.
local ventilatorfrequency conversion control technologyair volume adjustmentair pressureair resistance loss
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