Multi-hole gang drill

Abstract

The invention provides a multi-hole gang drill. The multi-hole gang drill comprises a shell, impact devices, a rotating mechanism, a drill steel shank, a drill rod, a drill bit and a shaping device. According to the multi-hole gang drill, the plurality of impact devices are arranged to provide axial impact power for the gang drill, the rotating mechanism is arranged to provide rotating power for the gang drill, and continuous drilling and grooving of a tunnel rock mass are achieved; meanwhile, the shaping device is arranged at the front end of the drill rod, the outline of the upper end of theshaping device is designed to be consistent with the actual excavation outline of a tunnel, a plurality of drill teeth are arranged on the end face of the outline of the shaping device, and the problem of back break in the drilling and grooving process is further solved through impact of the shaping device and the drill teeth.

Description

technical field [0001] The invention relates to the technical field of tunnel excavation equipment, in particular to a multi-hole row drill. Background technique [0002] In the tunnel constructed by drilling and blasting method, due to the measurement setting-out error, low drilling precision, limitation of blasting technology and geological conditions, the drilling equipment often produces over and under excavation, which not only seriously affects the stability of the tunnel support structure system In addition, due to the increase in the amount of slag discharge and backfilling, the construction cost of the tunnel has increased significantly. [0003] Drilling jumbo is often used in the existing tunnel excavation construction. Multiple rock drilling machines are installed on the rock drilling jumbo to realize simultaneous operation of multiple machines and centralized control, which can shorten the drilling time and improve drilling efficiency; drilling continuous holes ...

AI Technical Summary

Problems solved by technology

However, the gap between the drill rods is larger than the width of the rock drill, and a large-diameter drill bit is required to drill holes to maintain the continuity of the hole before slotting, and the energy loss is very large.

Secondly, multiple rock drills use independent impact rotary oil circuit systems, relying on one-to-one hydraulic hoses to deliver compressed air and high-pressure oil to the rock drills. Too many hose connections will not only hinder drilling operations, but are also easily damaged , resulting in downtime and replacement, delaying the construction period

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