针对煤矿井下化学降尘试剂添加设备存在体积大和添加精度低等不足,研究了一种矿用无动力液体自动添加装置。运用试验分析方法对液体自动添加装置的结构、密封形式和材料3个方面的关键技术展开优化研究。实验室试验表明装置的添加精度受各种因素的影响较小,在不同进水压力、进水流量、不同添加介质时的添加误差仅为5%。 Aiming at the problems of large volume and low accuracy of addition equipment for chemical dusting reagent in coal mine, a kind of mine automatic non-powered liquid adding device was studied. By means of experimental analysis, the key technologies of three aspects of the structure, sealing form and material of liquid automatic adding device are optimized. Laboratory tests show that the adding accuracy of the device is less affected by various factors, and the adding error is only 5% under different influent pressure, influent flow rate and different adding media.