Cylinder drill for rotary drilling rig

Abstract

The cylindrical drill for the rotary drilling rig comprises a cylindrical drill body, and the cylindrical drill body is provided with a top plate and a square sleeve; the cylindrical drill further comprises two arc-shaped centralizing plates. A semicircular end plate is fixed at the lower end of each arc-shaped centralizing plate, and two triangular notches of the two semicircular end plates are closed to form a rectangular through hole for the square sleeve to penetrate through; two straight inserting strips and an arc-shaped inserting strip are arranged on the lower surface of each semicircular end plate; each half area of the top plate is provided with two y-direction jacks and an x-direction jack; the arc-shaped insertion strip of each semicircular end plate penetrates through and hooks the x-direction insertion hole of the half area on the same side of the top plate, and the two straight insertion strips of each semicircular end plate are inserted into the two y-direction insertion holes of the half area on the same side of the top plate respectively. The four side edges of the two arc-shaped centralizing plates abut against each other in pairs; connecting beams are arranged on the upper portions of the two arc-shaped righting plates, the connecting beam on one side is provided with an upper mounting plate, the connecting beam on the other side is provided with a lower mounting plate, and the upper mounting plate is in threaded connection with the corresponding lower mounting plate. The barrel drill can effectively improve the drilling perpendicularity and is convenient to assemble.

Description

technical field [0001] The invention relates to the technical field of pile foundation construction machinery and equipment, in particular to a barrel drill for a rotary drilling rig. Background technique [0002] Due to the advantages of high efficiency, no pollution, and wide adaptability to strata, rotary drilling rigs have been more and more widely used in pile foundation construction. During the construction process, the rotary drilling rig transmits torque and pressure to the barrel drill through the drill pipe, and the barrel drill, as a key component of the rotary drilling rig, directly determines the energy efficiency of the drilling rig. [0003] The barrel drill of a traditional rotary drilling rig includes a barrel drill body with an opening downward. The bottom ring surface of the barrel drill body is provided with picks or buttons, the top of the barrel drill body is provided with a top plate, and the top plate is provided with a square sleeve. There is a squa...

AI Technical Summary

Problems solved by technology

However, the above idea cannot be implemented in actual construction. The bottleneck is that the height of the top of the mast of the rotary drilling rig is fixed, and the upper limit position of the top of the drill pipe is flush with the top of the mast, that is, the upper limit of the top of the drill pipe. The height is also fixed. In this way, the maximum ground clearance of the lower end of the drill pipe is also fixed, and the height of the barrel drill installed on the drill pipe must not exceed the maximum clearance height of the lower end of the drill pipe. Therefore, ordinary barrel drills can be installed smoothly. , but the height of the extended barrel drill obviously exceeds the maximum height from the ground of the drill pipe, so naturally it cannot be assembled

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