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7655型凿岩机已在煤矿中广泛应用。为提高该机的凿岩速度,作了改进供水方式、提高供水压力的试验研究。该机受气水联动机构的限制,供水压力一般不超过0.3MPa,供水量为5L/min。就降尘而言,这种水压和水量足够抑制粉尘飞扬,但排粉效果较差,岩渣重复破碎严重,在一定程度上影响凿岩速度和钎头寿命。软岩打眼易卡钎。此外,使用普通夹布胶管,不能承受较高压力,凿岩作业中常发生胶管爆裂现象。
7655 rock drill has been widely used in coal mines. In order to improve the drilling speed of the aircraft, the experimental research on improving the water supply mode and increasing the water supply pressure was made. This machine is limited by gas-water linkage mechanism, water supply pressure is generally not more than 0.3MPa, water supply is 5L / min. In the case of dustfall, this water pressure and water volume is sufficient to suppress dust flying, but the dust discharging effect is poor, and the slag is repeatedly crushed and severely affected to a certain extent, affecting the drilling speed and the life of the drill bit. Soft rock drilling easy to drill. In addition, the use of ordinary cloth folder hose, can not withstand higher pressures, drilling operations often occur hose burst phenomenon.