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在隧道以及地下挖掘等工程中,采用装有好几台凿岩机的巨型掘进设备来进行凿孔作业的时候,凿岩机的冲击和进退,历来是由人工操纵装在台车上的控制阀来实现的。因此,在各台凿岩机上安装自动控制系统,使一个工人能同时操作好几台凿岩机就很有必要。但是对于凿岩机的推进而言,以往采甩的自动控制装置是在推进的起点和终点设有接触式限位开关,通过阀的转换而实现动作的。在这种情况下,要变更推进距离比较麻
In the tunneling and underground excavation projects, the rock drilling machine’s impact and advance / retreat have always been achieved by manually manipulating control valves mounted on the trolley when drilling with a large tunneling machine equipped with several rock drills. Therefore, it is necessary to install automatic control system on each rock drill so that one worker can operate several rock drills at the same time. However, for the propulsion of rock drills, the automatic control device adopted in the prior art is provided with a contact type limit switch at the starting point and the end point of the propulsion, and is realized through the valve conversion. In this case, to change the distance to promote more hemp