Short distance speed-increasing type hard rock deep borehole drilling device

Abstract

The invention discloses a near-distance acceleration device for drilling deep holes in hard rock, which belongs to the field of drilling machines. An accelerator is arranged close to a drill bit; one end of the accelerator is an input shaft which is connected with a drilling machine; the other end of the accelerator is provided with an output shaft which is connected with the drill bit. The outside of the accelerator is provided with a sleeve; one end of the sleeve which is close to the drill bit is provided with a supporting hole wall and a movable jack catch used to fix the sleeve; the jack catch is provided with a bearing which contacts and is matched with the output shaft; a sliding key on the accelerator is matched with a sliding keyway on the sleeve; through holes which are communicated are arranged in the input shaft, the output shaft and the accelerator and communicated with the inside of the drill bit. The drilling device accelerates the drill bit only at the positions close to the drill bit in the deep holes, so that the drill bit can rotate and cut in the deep holes at high speed; the input shaft and a drill pipe rotate at low speed, so the drill pipe and the drill bit do not shake dramatically, which can not only ensure the liberality of the holes and the precision of the aperture, but also prolong the service life of the drill bit and improve the drilling efficiency.

Description

technical field [0001] The invention relates to a drilling tool, in particular to a short-distance speed-up type hard rock deep hole drill used for drilling in rocks. Background technique [0002] Drilling holes in rocks is a very important job in mining, construction, tunneling and other industries, such as anchor cable holes, blast holes, installation holes, etc., all need to drill holes in rocks. There are many equipment and tools for drilling, such as hydraulic drilling rigs, pneumatic drilling rigs, percussion drilling rigs, and various carbide drill bits and diamond drill bits. These drilling equipment all are to directly install drill bit on the output shaft of drilling rig, or then install extension drilling rod on the output shaft of drilling rig in order to drill deep hole, then drill bit is connected to the front end of drilling rod. The drilling rig is a device that provides power, and its volume is relatively large, so it can only stay outside the drilled hole....

AI Technical Summary

Problems solved by technology

Because the drill bit needs to rotate at high speed to drill the hole, when the drill pipe is lengthened, the drill pipe and the drill bit will vibrate violently when rotating at high speed, which will not only damage the drill bit, but also cannot guarantee the straightness and accuracy of the hole when drilling deep holes. aperture, and may also pose a safety hazard

[0003] The common disadvantage of these devices is that only low speed can be used when drilling deep holes, so the drilling efficiency is very poor; when high speed, deep holes cannot be drilled.

When drilling in hard rocks, the speed is generally slow and the efficiency is low; when encountering layered rocks of different hardness or geological structures with alternating rock layers and soil layers, the drilled holes cannot meet the requirements

Drilling is the preliminary work for other operations, and the low efficiency of drilling will affect the progress and speed of other operations

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