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国内普通法立井施工排水多采用吊泵,因为它占用空间面积小,而且扬程较高。我们在建设鄂庄煤矿主、副、风井和燕子山煤矿副井、以及蒋庄煤矿各井筒施工中,都采用NBD-50型吊泵排水。井深为205米～488米,结合工程实践,对NBD-50型吊泵作了以下修改,收到较好的效果。 1.增加叶轮以提高扬程 该型泵额定流量为50米~3/时,额定扬程为250米,我们在并筒掘到垂深240米时,水速缓慢,扬水困难。因井筒中间转水站设在深256米处,为此增加叶轮1个,运行时情况正常,满足了施工排水的要求,增加两个叶轮,扬程增加44米,运行情况良好。
Domestic common law well drainage construction more hanging pump, because it occupies a small space, but also higher head. In the construction of E Zhuang coal mine main and auxiliary shaft and Yanzishan coal mine shaft, as well as Jiangzhuang coal mine shaft construction, are used NBD-50 type hanging pump drainage. Depth of 205 meters to 488 meters, combined with engineering practice, the NBD-50-type lifting pump made the following changes, received good results. 1. Increase the impeller to improve head The pump rated flow of 50 meters to 3 / hour, the rated head of 250 meters, we dug down to the depth of 240 meters, the water speed is slow, difficult to pump water. Due to the wellbore intermediate transfer station located at a depth of 256 meters, an increase of impeller for this operation is normal, to meet the requirements of construction drainage, an increase of two impeller, lifting head 44 meters, running in good condition.