Drill pipe of engineering driller

Abstract

A drill pipe of an engineering driller comprises a power driving plate, a drill pipe, a press frame, a drill pipe fixing ring, two lifting oil cylinders, an underframe and a hydraulic system; the drill pipe of the engineering driller is characterized in that the upper part of the drill pipe is provided with a mounting flange; the press frame is positioned above a driving sleeve; the drill pipe penetrates through a hole of a drill pipe press frame; the mounting flange of the drill pipe is fixedly mounted on the upper end surface of the drill pipe press frame; the drill pipe fixing ring is mounted in a sleeving manner at the upper part of the drill pipe, which extends out of the end surface of the mounting flange; the two lifting oil cylinders are fixedly mounted on left and right sides of the underframe in a vertical and symmetric way; piston rods of the two lifting oil cylinders are connected with the press frame; piston rods of two press rod oil cylinders are connected with press rods; a hand-directional valve in the hydraulic system can be used for changing the flowing direction of hydraulic oil, so that the piston rods of the lifting oil cylinders are pulled downwards and jacked upwards; the piston rods of the press rod oil cylinders extend out and retract, so as to respectively apply a pressure to the press frame and release the pressure of the press frame; and the drill pipe is used for drilling in pressurized and normal states; and according to the invention, through the adoption of a drill pipe fixing ring structure, the stability and drilling capability of the engineering driller in operation are improved, the construction efficiency of the driller is increased, and the construction progress is reduced.

Description

technical field [0001] The invention relates to a drill rod, more precisely, to a drill rod for an engineering drilling rig. Background technique [0002] At present, in the construction of highways, railways, bridges, high-rise buildings, ports and dams, large-diameter cast-in-place piles are widely used in pile foundation construction, and there is a further market demand for large-diameter cast-in-situ pile engineering drilling. This type of engineering drilling rig in the prior art increases the energy of the engineering drilling rig to drill the formation by relying on the weight of the drill pipe, the drilling tool assembly and the weight of the drill bit during the drilling process of the drilling tool. However, the engineering drilling rig of this structure The drill pipe is heavy and the drilling efficiency is low, especially when the hard rock layer is encountered during the drilling process, the rock-breaking ability of the drilling rig can only be solved by repla...

AI Technical Summary

Problems solved by technology

This type of engineering drilling rig in the prior art increases the energy of the engineering drilling rig to drill the formation by relying on the weight of the drill pipe, the drilling tool assembly and the weight of the drill bit of the drilling rig during the drilling process of the drilling tool. However, the engineering drilling rig of this structure The drill pipe is heavy and the drilling efficiency is low, especially when the hard rock layer is encountered during the drilling process, the rock-breaking ability of the drilling rig can only be solved by replacing the expensive drill bit or purchasing a more powerful engineering drilling rig. This will cause high cost to the construction unit and affect the efficiency of construction operations.

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