提高独头巷道供风系数的途径

为了提高送风系数,笔者在独头巷道作了大量试验。对风筒接头形式作了改进,同时节长加大到20米。论文对各种试验结果作了对比:插接接头,节长为10米,送风系数为46%;粘接方式,节长增到20米,采用插接及胶粘两种接头,则送风系数提高到75%;如改为活单环接头,则效果更好,送风系数可达89%。据此,不仅可减少一台局扇,且大大延长了送风距离,降低了生产成本、提高了经济效益。

THE WAY OF RAISING THE COEFFICIENT OF AIR-FEED IN THE BLIND HEADING

In order to raise the coefficient of air-feed, a large number of experiments in the blind heading were conducted by the authors. The duct-joint has been improved, meanwhile the air-duct has also been lengthened to 20 meters. In this paper different kinds of cases are compared, when the length of socket air tube is about 10 meters, the coefficient of air-feed is 0.46. However, the coefficient of air-feed will be 0.75 when the air-ducts are lengthened to 20 meters by means of cementing. If the duct-joint of active single-ring is used, the result will be better, which means the coefficient of air-feed can reach 0.89. As a result, not only a ventilator can be reduced but the distance of air-feed is also lengthened greatly so that the production cost is lowered, and the productivity is raised.