YCJF-30型全液压冲击反循环钻机的研制与应用

Development and application of YCJF-30 full hydraulic percussive reverse circulation drill rig

为满足不断增多的3m口径钻孔灌注桩的施工要求,完善全液压冲击反循环钻机的系列规格,研制了额定施工口径为3m的YCJF-30型全液压冲击反循环钻机。该钻机采用机、电、液一体化技术;采用独特的液压油缸冲击方式;差动双卷筒卷扬机提升能力强;配有液压步履,可方便左右前后移位以对正孔位;起塔、落塔为液压油缸控制,操作平稳、安全、省力;冲击锤头质量大(20t),破岩效率高;采用气举(或泵吸)反循环排渣,排渣能力强。生产试验证明,该钻机参数合理先进,性能可靠,自动化程度高,操作简单,维护容易,使用成本低,能适应各种地层施工,可选用气举和泵吸两种反循环排渣工艺。

In order to meet the increasing demand for bored piles with 3 m diameter and complete the series sizes of full hydraulic percussive reverse circulation drilling rig, YCJF-30 full hydraulic percussive reverse circulation drilling rig with the nominal drilling diameter of 3 m was developed. The mechanical, electrical and hydraulic technology is integrated into the YCJF-30 drilling rig, with the unique hydraulic cylinder for impact, the differential double-drum hoist for increasing lifting ability, and the heavier 20 t impact hammer for high rock-breaking efficiency. The drilling rig is equipped with hydraulic step-walk crawlers, which can be conveniently shifted to align with the well collar. The drilling tower is controlled by hydraulic cylinders, which are stable, safe and labor-saving. Furthermore, air-lift or pump reverse circulation can be adopted to discharge drilling cuttings with high carrying ability. The production test showed that the drilling rig has reasonable and advanced parameters, reliable performance, high degree of automation, simple operation, easy maintenance, low cost, and can be used for drilling of various formation.