钻装机液压防卡钎控制系统设计

摘要

为解决钻装机在钻孔作业中的卡钎问题,提出了一种新的防卡钎方案,即在冲击油路中设置三级冲击压力,利用高压冲洗水压排渣的同时,冲洗水压信号控制推进油缸和冲击器先导油路的通断,实现自动预防缓慢卡钎,利用推进压力的突然下降或上升控制冲击器停冲来预防溶洞卡钎,利用钎转压力的上升控制推进油缸后退来预防缓慢卡钎和裂隙卡钎,并设计了相应的液压控制系统.试验结果表明,新液压防卡系统提高了钻装机的防卡钎能力,可实现自动预防和处理各类卡钎问题.%In order to solve the rod jammed problem in the borehole drilling operation of the drilling and loading machine,a new rod jammed prevention plan was provided.That was to set up a three stage impact pressure in the impact oil circuit.When the pressure of the high pressure water flushing was applied to discharge the drilling cuttings,the water flushing pressure signal could be applied to control the on-off of the pushing cylinder and pilot oil circuit of the impactor in order to realize the auto prevention of the slow rod jammed.A sudden down or up of the pushing pressure was applied to control the stop or impact of the impactor to prevent the rod jammed in the karst cave.The rising of the rod rotary pressure was applied to control the backward of the pushing cylinder to prevent the slow rod jamming and crack rod jamming.A relevant hydraulic control system was designed.The test results showed that the new hydraulic rod jamming prevention system could improve the rod jamming prevention capacity of the drilling and loading machine and could realize the automatic prevention and different rod jamming handling.