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使用班加钻进行砂金矿钻探时,起拔外管都是采用杠杆撬加振动的方法.缺点是用人多(有时多至三十余人),劳动强度大,很不安全,效率又低,杂木撬杠、竹杠、垫木等消耗量大,取材困难. 为了提高效率,确保安全,经多次实践,我们采用环链手拉葫芦配上简易三脚架起拔外管,收到很好的效果,其原理是将直线上升起重改为螺旋上升起重.操作时只需6～8人就够了,四个小时可较轻松地起拔15米以上外管,效率提高好几倍. 三脚架是用三根各5米长的φ73岩芯管组成,上穿销钉连接,下穿底面带钉的鸭脚板. 操作方法:先将三脚架穿好销钉与鸭脚板,用一
When using sand drills for sand gold drilling, the lifting of the outer pipe is done by using a lever to increase the vibration. The disadvantage is that there are many people (sometimes more than 30 people), labor intensity, very unsafe, and low efficiency The use of wood crowbars, bamboo bars, and wood shimming is difficult. It is difficult to obtain materials. In order to improve efficiency and ensure safety, we have adopted a chain chain hoist and a simple tripod to lift the outer tube. The good effect is that the principle is to change the straight lifting and lifting to screw lifting and lifting. Only 6-8 persons are enough for operation. Four hours can easily lift and pull the outer tube more than 15 meters, and the efficiency is improved several times. The tripod is made of three cores of φ73 cores each 5 meters long. The pins are connected through the pins and run through the duck feet with nails. The method of operation is to put the tripod on the pins and the duck feet first.