Citation: | LI Tuanjie,HUANG Weiming,PAN Weihua,et al. Research on local ventilation constant air volumeintelligent switching technology and its application[J]. Coal Science and Technology,2023,51(4):166−174. DOI: 10.13199/j.cnki.cst.2022-2199 |
In the of local fan for mine fan switch, it’s easy to have a short stop wind that cause the safe production of gas concentration transfinite problem. In order to avoid the phenomenon of air volume suspension caused by fan switching, according to the principle of constant air volume switching, the intelligent switching control system of local fan with constant air volume is studied. By using the principle of constant air volume feedback fuzzy regulation control, a new intelligent remote control system of mine local fan and an intelligent monitoring device of ZFJ1140 local fan are developed. It realizes the remote and real-time monitoring of constant air volume and fan running parameters in the process of fan switching. The aerodynamic performance test was carried out in four places: the air inlet, the air inlet, the air inlet and the air outlet of the collector. The results show that the aerodynamic performance of the fan is good, and the total pressure efficiency of the fan fluctuates in the range of 82.5%-85%. The application of ZFJ1140 local fan in 1010 auxiliary roadway of No.1 Coal mine of Shaanxi Coal Huangling Mining Group shows that the variation of roadway air volume is controlled within 8.89% during the air volume switching period. Compared with the traditional local fan switching mode, the constant air volume switching function of the intelligent local fan effectively ensures that the gas concentration in the roadway is maintained in a safe range during the air volume switching process.
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