Design of automatic frequency-conversion control system of fireproof and extinguishing by even air pressure
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摘要: 针对传统人工均压防灭火方式存在功耗大、准确度和自动化程度低、实时性差的问题，设计了一种均压防灭火自动变频调控系统，详细阐述了系统的组成、运行方式与控制方法、逻辑实现过程。该系统采用多层采空区流场局部动态风压平衡理论，根据回采工作面与上部相邻采空区的压差，采用自动变频调控局部通风机的方法改变回采工作面压力，达到工作面与周围环境均压的目的，实现了多层采空区相互连通回采工作面的均压防灭火的自动控制。Abstract: In view of problem of big power consumption, low degree of automation, low accuracy and real-time performance existed in traditional and artificial control method of fireproof and extinguishing by even air pressure, an automatic frequency-conversion control system of fireproof and extinguishing by even air pressure was designed, and composition, operation mode， control method and logic implementation process of the system were introduced. The system adopts theory of local dynamic air pressure balance of multilayer goaf flow field, uses method of automatic frequency-conversion to control local ventilator to change pressure of working face according to differential pressure of working face and upper adjacent goaf, so as to reach the purpose of pressure equalizing of working face and ambient, which realizes automatic control of fireproof and extinguishing by even air pressure of interconnected mining working faces of multilayer goaf.
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