An Anchor Hole Reaming Re-expansion Head

Abstract

The anchor hole reaming head of the present invention relates to the field of construction machinery, including inner rods, outer rods, pull rods, jackets, blades, blade pins, guide sleeves, cone blocks, cone pins, and the diameter of the inner through hole of the outer rod is larger than that of the inner rod. The outer diameter is large, the inner rod is placed in the through hole of the outer rod, the front end of the jacket is connected to the rear end of the outer rod, and a stepped hole is provided in the jacket, the rear of the stepped hole is large and the front is small, and the front stepped hole is connected with the through hole on the inside of the outer rod. The sleeve is positioned in the stepped hole at the rear end. The front end of the tie rod passes through the stepped hole at the front end to connect with the rear end of the inner rod. The rear end of the tie rod is positioned in the guide sleeve. The diameter of the stepped hole at the front end is larger than the outer diameter of the tie rod. The hole is connected with the knife board storage groove. The two knife boards are installed in the knife board storage groove. The cone block is set outside the pull rod and fixed relative to the pull rod. The front end of the cone block is provided with a slope. Between the cutter boards, the two cutter boards stretch out of the cutter board receiving groove, and when the inner rod pushes the pull bar backwards, when the slope does not reach the inner side of the two cutter boards, the two cutter boards return and retract into the cutter board receiving groove.

Description

technical field [0001] The invention relates to the field of construction machinery, in particular to an anchor hole reaming back-expansion head for expanding the anchor hole of a bolt. Background technique [0002] In the construction of the existing bolt support technology, the installation and anchoring process of the anchor is generally as follows: first, use a drill bit matching the diameter of the anchor rod body to drill an anchor hole on the wall at the installation position of the anchor rod, and put the anchor hole into the anchor hole. Put a certain specification of anchoring agent to the bottom of the hole, push the anchor rod into the anchor hole, after the anchoring agent solidifies, anchor the anchor rod in the anchor hole. A drill or backsink is required when drilling anchor holes. [0003] The invention patent application with the Chinese patent application number 201410187108.6 discloses a reaming drill bit and an anchoring method for a bolt. The hole dri...

AI Technical Summary

Problems solved by technology

However, this reaming drill has the disadvantage that it cannot expand back to the blind hole.

The utility model patent with the Chinese patent application No. 201220460042.X discloses a rear-expanded drill bit, which includes a twist-guided bottom, a blade, a blade holder, a non-return screw, a limit pin, a co-position spring and a uranium handle. The drill has the disadvantage that it can only enlarge the bottom of the blind hole

The invention patent application with the Chinese patent application number 201410434624.4 discloses a single-wing reaming method at the bottom of the anchor hole. This reaming method is not used with a drilling rig, and the force is small.

In addition, there is no liquid injection in the above-mentioned reaming or drilling devices during the drilling process, the chips cannot be removed smoothly, and there are defects that they are easy to get stuck.

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