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目前国内生产的岩心钻机在提高岩心钻进效率、实现钻进中不停钻倒杆方面存在着不足。我队在20世纪80年代中期就开始研究不停钻倒杆装置——双卡盘接力给进机构,并应用到XY-4型钻机上。该装置结构简单,夹持可靠,操作灵活,可合理控制钻进压力,倒杆时孔底压力不会骤然增减,使得给进连续均匀。在多年的生产实践中,该项技术满足了金刚石钻进的工艺要求,降低了金刚石钻头的非正常消耗,减少了孔内事故,使绳索取心钻探生产效率得到较大提高。
At present, the domestic production of core drilling rig in improving the core drilling efficiency, continuous drilling down to achieve the rod there is a lack of. In the mid-1980s, my team started researching on-the-fly down-the-rod devices - the dual chuck relay feed mechanism and applied it to the XY-4 rig. The device has the advantages of simple structure, reliable clamping, flexible operation, reasonable control of drilling pressure, sudden change of pressure at the bottom of the hole when inverted rod, and continuous feeding even. In many years of production practice, the technology meets the diamond drilling process requirements, reducing the diamond drill abnormal consumption, reducing the hole accident, the rope coring drilling production efficiency has been greatly improved.