Downhole breaking rock-entering drill of hydraulic slewing drilling machine

Abstract

The invention provides a downhole breaking rock-entering drill of a hydraulic slewing drilling machine and relates to a rock breaking device applicable to a power head type full hydraulic slewing drilling machine. The problems that in the drilling process, once an existing power head type full hydraulic slewing drilling machine encounters a rock stratum, a drill bit cannot enter the rock easily, the drilling efficiency is low, one-time impact holing of a large-diameter pile hole cannot be achieved, continuous hole bottom slag discharge cannot be achieved, the rock entering speed is slow, the drill bit is severely abraded, and the cost is high are solved. An oil circuit rotating connector assembly is additionally arranged on a drill rod of the slewing drilling machine. A central shaft of the rotating connector assembly is connected with the drill rod through a flange. The lower end of the rotating connector assembly is connected with a gas lifting hard rock drill bit through a vibrator. In the drilling and rock entering processes, percussive drilling is adopted, the rock entering and drilling efficiency is improved, continuous gas lifting slag discharge of the drilling machine is not changed while the vibrator conducts vibrating striking to cooperate with drilling of a drill bit, and the functions of striking and drilling of the power head type full hydraulic slewing drilling machine are achieved.

Description

technical field [0001] The invention relates to a power head type full hydraulic rotary drilling rig, in particular to a down-the-hole crushing rock drill suitable for the power head type full hydraulic rotary drilling rig for rock drilling. Background technique [0002] The power head type full hydraulic rotary drilling rig currently used, once it encounters a rock formation during the drilling process, it is difficult for the original drill bit to enter the rock quickly, and the drilling efficiency is extremely low. The traditional drilling method relies on the grinding of the drill teeth at the bottom of the drill bit. When encountering a rock formation with a hardness of 100 MPa and above, its rock-penetrating speed is only about 1 meter in 10 hours. Although the use of a pneumatic down-the-hole hammer can impact the rock formation, the efficiency is low. The larger the diameter of the pile hole, the higher the cost of the down-the-hole hammer, and it is impossible to re...

AI Technical Summary

Problems solved by technology

[0002] The power head type full hydraulic rotary drilling rig currently used, once it encounters a rock formation during the drilling process, it is difficult for the original drill bit to enter the rock quickly, and the drilling efficiency is extremely low. The traditional drilling method relies on the grinding of the drill teeth at the bottom of the drill bit. When encountering a rock formation with a hardness of 100 MPa and above, its rock-penetrating speed is only about 1 meter in 10 hours.

Although the use of a pneumatic down-the-hole hammer can impact the rock formation, the efficiency is low. The larger the diameter of the pile hole, the higher the cost of the down-the-hole hammer, and it is impossible to realize the one-time impact of a large-diameter pile hole into a hole. Multiple reaming is required. Realize continuous slag discharge at the bottom of the hole, and the rock entry speed is relatively slow

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