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我们在水文地质工作中,自行设计试制了一种提拉式三合物同径止水器。经多年生产实践证明:使用这种止水器,水文地质钻孔结构简单,钻探施工效率高,止水效果显著。这种止水器至少可承受7公斤/厘米~2的压力。止水器构造如图1所示,其中三合物为石灰、桐油、麻头,按10:3:1的比例混合,并调和均匀,保持3～5分钟不变形为好。止水时,先接好止水器,在上下盘各放设一块用皮带做成的园垫(垫子外径为112毫米),然后在89毫米阶梯管及89毫米套管(即连接在阶梯管上部的套管,其长度可
In our hydrogeological work, we designed and manufactured a self-priming tri-collet water stop. After years of production practice has proved that: the use of such a stop, hydro-geological drilling simple structure, high efficiency drilling construction, sealing effect is significant. This stoppers can withstand at least 7 kg / cm ~ 2 pressure. Stopper structure shown in Figure 1, wherein the triad of lime, tung oil, Ma Tau, according to the ratio of 10: 3: 1 mixing, and reconcile evenly, maintaining 3 to 5 minutes is not deformed as well. Water stop, the first good stopwatch, placed in the upper and lower disc with a belt made of mat (pad diameter 112 mm), and then 89 mm ladder pipe and 89 mm casing (that is connected to the ladder The upper tube casing, its length can be