Cone down-the-hole mixing drilling tool and cone down-the-hole drill including the same

Abstract

The invention discloses a cone down-the-hole mixing drilling tool which is used for a drill and particularly suitable for a large-diameter open-air drill. The cone down-the-hole mixing drilling tool comprises a connector which connects the drilling tool with a drill rod, the connector is of a hollow structure, a check valve assembly and a prepressing spring are mounted inside an inner cavity of the connector in sequence, the connector, a connecting sleeve, a cone palm and a cone are connected in sequence, an impactor is arranged inside the connecting sleeve, an air drain is formed between the inner side of the connecting sleeve and the impactor, one end of the impactor abuts against the prepressing spring, the other end of the impactor is connected with a percussion bit, one end, close to the prepressing spring, of the impactor is provided with an air inlet, an air distribution mechanism is arranged on the inner side of the connecting sleeve and used for distribution of high pressure gas of the cone palm and the impactor. The cone down-the-hole mixing drilling tool enables cone drilling to be combined with down-the-hole drilling, and has the advantages of a wide range of drilling diameters, low machine weight and high drilling efficiency. The invention further discloses a cone down-the-hole drill including the cone down-the-hole mixing drilling tool.

Description

technical field [0001] The invention relates to the field of mining machinery, in particular to a roller cone down-the-hole hybrid drilling tool, and the invention also relates to a roller cone down-the-hole drilling machine. Background technique [0002] Drilling rig, as an important construction machine in mining machinery, is widely used in blasthole construction in open-pit mines. Existing drilling rigs are mainly down-the-hole drilling rigs and roller cone drilling rigs. Among them, the down-the-hole drilling rig uses the hammer body in the impactor to hit the shank tail so that the impact force of the drill bit can punch holes in the rock formation. It has the advantages of light weight, but the drilling diameter is small and the perforation efficiency is low; the roller cone drill drills and rotates on the rock at the same time, generating static pressure and impact dynamic pressure on the rock, thereby continuously extruding and cutting The drilling is formed by imp...

AI Technical Summary

Problems solved by technology

Existing drilling rigs are mainly down-the-hole drilling rigs and roller cone drilling rigs. Among them, the down-the-hole drilling rig uses the hammer body in the impactor to hit the shank tail so that the impact force of the drill bit can punch holes in the rock formation. It has the advantages of light weight, but the drilling diameter is small and the perforation efficiency is low; the roller cone drill drills and rotates on the rock at the same time, generating static pressure and impact dynamic pressure on the rock, thereby continuously extruding and cutting Drilling is formed by impacting and breaking rocks, which has the advantages of large drilling diameter and high perforation efficiency, but the machine is heavy

[0003] For open-pit mines, a series of down-the-hole drilling rigs and roller cone drilling rigs are used to cover holes with commonly used blasthole diameters; at the same time, the heavy-duty roller cone drilling rigs used for large-diameter drilling, in order to ensure the axial thrust of the drill bit, The weight of the whole machine is heavy; these will increase the equipment input and use management difficulties of the mine, and increase the manufacturing cost for the manufacturer

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