潜孔冲击器的使用与维护

一.概述(general)：

hd系列高风压冲击器是一种冲击凿岩工具，但他与其它凿岩工具不同的是，凿岩过程中它始终留在孔的底部，活塞直接冲击钻头。
series hd high air-press dth are designed as a hammer drill. they differ from other rock drills, however, through continuous operation down against the drill bit.
压缩气体经过钻杆进入冲击器，而后从钻头排出，排出的废气被用来排碴。冲击器的回转运动由回转头提供，轴推力由推进器提供，通过钎杆传递到冲击器上。
compressed air is led to the rock drill thorough the dill tube string. exhaust air is discharged through hole in the drill bit and used to flush clean the drill hole. rotation is delivered from a rotation unit and feed force from the feed is transferred the dth drill via the drill tubes.

二.结构原理（technical description）：

这种潜孔冲击器是这样组成的，活塞、内缸、配气座、逆止阀和钻头附件等安装在细长的外缸内，外缸的上有装带扳手口和联接螺纹的上接头，下端装有螺纹连接的卡钎套。卡钎套主要用于向钻头传递推进力和回转运动。卡环控制钻头的轴向运动，而逆止阀是当停止供应压气时，用来妨止岩碴等杂物进入冲击器。钻进过程中，钻头被推进冲击器，并压在卡钎套上，此时活塞直接冲击钻头进行凿岩。当钻头提离孔底是，开始强吹。
the dth dill comprise a narrow elongated tube which contains an impact piston, internal cylinder, air distributor, check valve. the real, threaded top sub is fitted with a spanner slot and coupling thread for connection to the drill tubes. the forward part, the driver check, also fitted with thread, enclose the splines-equipped bit shank and thansfers feed force as well as rotation to the drill bit. a stop ring limits axial movements of the drill bit. the purpose of the check valve is to prevent impurities from penetrating the rock drill when pressedair is shut off. during drilling, the drill bit is with drawn inside the dth and pressed against the drive chuck. the piston strikes directly against impact surface of the shank of the bit. air blowing occurs when the bit loses contact with the bottom of the hole.

三.使用与维护(operation