煤矿井下用大通径钻杆内飞边清理装置的设计与研究

Design and Research of Internal Flash Cleaning Device for Big Diameter Drill Pipe Used in Underground Coal Mine

大通径钻杆是煤矿井下瓦斯抽采钻孔施工中常用的一种钻杆,钻孔完成后直接从钻杆内通孔下筛管,杜绝了以往提钻后易塌孔导致无法下筛管的现象。以此类钻杆为研究对象,对内飞边车削后残留于钻杆孔内的飞边清理工艺展开研究。设计了一种手持气动式内飞边清理装置,替代了原有的人工掏铁屑的处理方式,大大降低了工人的劳动强度,改善了工作环境,缩短了单根钻杆内飞边清理时间,极大地提高了工作效率,使用上更加安全可靠。

The big diameter drill pipe is a kind of drill pipe commonly used in the construction of gas extraction borehole in underground coal mine. After drilling, the screen pipe can be lowered directly through the hole inside the drill pipe,which eliminates the apperance that the hole is easy to collapse after lifting the drilling hole and can not run the screen pipe. Taked the drill pipe used in coal mine as the research object,the internal flash cleaning technology which remains in the drill pipe hole after the internal flash turning was studied. A hand-held pneumatic internal flash cleaning device was designed to replace the original manual way of removing iron filings. It greatly reduces the labor intensity of workers,improves the working environment,and shortens the cleaning time of flash inside a single drill pipe. This device greatly improves the work efficiency and makes it safer and more reliable to use.