Drill tool righting device for high rotation speed tunnel drilling machine

Abstract

The invention discloses a drill tool righting device for a high rotation speed tunnel drilling machine. The high rotation speed tunnel drilling machine comprises a rack, a power head, a drill rod, a drill bit and a clamping device. The power head and the clamping device are installed on the two sides of the rack correspondingly, the drill bit is installed at the front end of the drill rod, the drill rod penetrates through the power head and the clamping device, a clamping disc can hold the drill rod to complete the drilling process, and the clamping disc and the clamping device are matched to complete screwing and dismounting of the drill rod. The drill tool righting device comprise a front righting assembly and a rear righting assembly; the front righting assembly is detachably fixed to the rack and composed of a front righting cover, a sleeve, a bearing and a support; an annular piece used by the sleeve for sleeving is installed at the upper end of the support, and the front righting cover is installed in the sleeve; and the rear righting assembly is installed on the power head and comprises a rear righting cover which is installed on the drill rod in a sleeve mode. In this way, the drill tool righting device has a drill tool righting function in drilling construction, drill rod vibration under high rotation speed working conditions is effectively reduced, and damage to the drill rod by the clamping device is reduced.

Description

technical field [0001] The invention relates to the technical field of tunnel drilling, in particular to a drilling tool straightening device for a high-speed tunnel drilling machine. Background technique [0002] High-speed tunnel drilling rigs are mainly used for coring exploration in tunnels. Compared with conventional surface drilling, they can save a lot of engineering work, and facilitate multi-angle drilling construction to achieve the purpose of drilling along the deposit layer and avoid upper goafs. It is an ideal method for exploring deep resources in old mining areas. [0003] Tunnel drilling has various angles, especially when drilling horizontal holes, the direction of gravity of the drill pipe is perpendicular to the direction of its rotation axis, and the moment of inertia will drive the vibration of the drill string. The higher the speed of the drilling rig, the more severe the vibration. Chuck and holder are the key components of the drilling rig. They coop...

AI Technical Summary

Problems solved by technology

[0004] At present, for hole depth measurement in related fields, the relevant domestic and foreign documents and patents retrieved are as follows: Chinese patent ZL201310028054.4 involves a split-type drilling tool straightening device, which can be used to straighten the drilling tool when the drilling tool is installed, but the normal high speed When drilling, the rollers and pins in the structure will be severely worn, so the inventive device cannot meet the requirements for normal drilling of high-speed drilling rigs

[0005] Chinese patent ZL201420324613.6 relates to the drill pipe straightening device of the roller cone drilling rig, which is mainly used for straightening the drill pipe on the roller cone drilling rig to keep the drill pipe and the power head concentric, and does not have the righting function during normal drilling

[0006] Chinese patent ZL201520265385.4 relates to drill pipe centralizers, which are mainly used in horizontal directional drilling rigs, and are only suitable for single-size drill pipes. The rollers and pins are severely worn at high speeds, so they are not suitable for high-speed drilling rigs.

[0007] Chinese patent ZL201310622559.3 relates to a centralizer for drill pipes in boreholes of engineering drilling rigs. Its application is to straighten drill pipes in boreholes to prevent hole inclination, and is not suitable for high-speed drilling rigs.

[0008] Chinese patent ZL201420069462.4 relates to the centralizing device for drilling rigs. This patent provides a sliding centralizing device, which is mainly suitable for large-scale masts or drilling towers, and cannot meet the requirements for equipment in the narrow working environment in the tunnel.

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