Double-cylinder loose blade clamping and taking type self-locking cutting tooth core drill cylinder

Abstract

The invention provides a double-cylinder loose blade clamping and taking type self-locking cutting tooth core drill cylinder which comprises an outer cylinder, an inner cylinder, a first reset spring,multiple rotating loose blades, multiple sets of self-locking mechanisms and unlocking devices corresponding to the sets of self-locking mechanisms. When the cylinder is filled with rocks and the inner cylinder overcomes pressure of the first reset spring to move upwards relative to the outer cylinder, the tail ends of the rotating loose blades at the bottom of the outer cylinder can be opened gradually, the self-locking mechanism can lock the positions of the inner cylinder and the rotating loose blades, the rocks in the inner cylinder are blocked, and the rocks are prevented from falling from the inner cylinder. Unlocking rods of the unlocking devices are pressed, locking of the position of the inner cylinder and the angles of the rotating loose blades can be released, and rock unloading is completed. The double-cylinder loose blade clamping and taking type self-locking cutting tooth core drill cylinder is simple in structure, convenient to operate and high in efficiency; the rotating loose blade does not affect the rotary excavation drilling work of the outer cylinder, the drilling resistance of the drill cylinder is small, and the drilling work efficiency is high. A guide barand a guide groove which are matched in a sliding manner are arranged between the inner cylinder and the outer cylinder, a guiding effect is achieved on moving of the inner cylinder, and the inner cylinder can be prevented from rotating in the circumferential direction relative to the outer cylinder.

Description

technical field [0001] The invention relates to a rotary drilling tool of a rotary drilling rig, in particular to a double-barrel loose leaf card self-locking pick core-taking drill barrel. Background technique [0002] The pick core drill barrel is a kind of rotary drilling tool that is widely used. It is mainly used for drilling hard rock mass or mixed soil layer with hard rock mass. The pick core drill barrel is mainly used for During the rotary excavation process, the rock mass is cut and the cut rock blocks are extracted out of the drill hole. The existing pick core drilling barrel is a single-wall micro-cone barrel structure, and the bottom is arranged with picks for cutting the rock mass. There is a water outlet, which is connected with the drill pipe of the rotary drilling rig through the square mortise and pin structure, and accepts the pressure and torque transmitted from the drill pipe. When the pick core drill barrel is working, the drill pipe transmits pressure...

AI Technical Summary

Problems solved by technology

[0003] The existing pick core drilling barrel has a single-wall barrel structure, and the picks at the bottom can efficiently cut the rock mass, but cannot completely extract the rock mass stored in the drill barrel out of the borehole, mainly because the cutting The coring drill barrel does not have a rock block pick-up device, which causes the compacted broken rock blocks to fall when the drill barrel is filled and lifted upwards, which seriously affects the coring efficiency

In addition, when the drilling rig is used to shake the drill barrel during the process of unloading the rock blocks outside the hole, the broken rock in the drill barrel is easy to hit the inner wall of the drill barrel, causing relatively long-term noise and affecting the construction environment

[0004] Existing rotary drilling rigs are generally only equipped with a soil retaining mechanism at the bottom of an ordinary drilling bucket dedicated to soft clay layers. For example, Chinese patent 201910653190.X discloses a rotary drilling rig, which is provided at the bottom opening of the drilling bucket The drill door can be turned and opened, and the turning device is also connected to the drive cylinder. The structure is complex and the operation steps are many, which is not conducive to improving construction efficiency.

In addition, Chinese patent 201220354155.1 discloses a flap drill with a soil retaining mechanism. In this solution, the bucket teeth are replaced with picks for drilling hard rock mass, and a soil retaining device is added at the opening at the bottom of the drill bit. Although the baffle mechanism can retain soil, it will increase the resistance during the drilling process, and because the baffle has a two-way blocking effect, it is difficult for large pieces of hard rock to enter the drilling bucket

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