Tunnel back break control system based on folding propelling beam structure

Abstract

The invention relates to a tunnel over-excavation and under-excavation control system based on a folding propelling beam structure, which comprises a propelling beam main beam, a rock drill and a drill rod, a folding beam is hinged to the head of the propelling beam main beam, and the deflection angle of the folding beam relative to the propelling beam main beam is 0-180 degrees; a hinge mechanism is arranged between the propelling beam main beam and the folding beam and comprises a cam-shaped connecting plate arranged at the head of the propelling beam main beam, a first C-shaped connecting beam hinged to the tail of the folding beam and a second falcate connecting beam hinged between the first connecting beam and the connecting plate. A folding oil cylinder is hinged between the middle of the first connecting beam and the head of the folding beam, the head of the folding beam is provided with a front drill rod lifter used for correcting a drill rod, and the front drill rod lifter tightly abuts against a tunnel face. The folding beam is additionally arranged on the basis of an existing propelling beam structure, the deflection action of the folding beam within the range of 0-180 degrees is achieved through hydraulic drive, the insertion angle of a drill rod is controlled, and therefore back break is controlled.

Description

technical field [0001] The invention relates to the technical field of rock drilling equipment, in particular to a tunnel overbreak and underbreak control system based on a folded propulsion beam structure. Background technique [0002] The rock drilling jumbo installs one or several rock drilling machines together with propellers on a special drilling arm, and is equipped with a chassis for rock drilling operations. Rock drilling jumbo has become a common equipment for tunnel engineering drilling. [0003] Due to the limitations of the structure of the existing rock drilling machine such as its own center height, when constructing the peripheral hole of the tunnel, it is necessary to drill the drill pipe obliquely for drilling construction, and it is impossible to make the drill pipe stick to the tunnel contour line and cut horizontally, so there must be a certain amount of extrapolation. angle, resulting in over digging and under digging. Severe overexcavation will great...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the bending angle of the drill pipe is difficult to control resulting in over-under-excavation, the present invention provides a tunnel over-under-excavation control system based on the folding propulsion beam structure, which can flexibly adjust the position of the drill pipe, and has a wide adjustment range to ensure the horizontal drilling of the drill pipe, effectively Control over and under mining

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