A support mechanism and a rotary drilling rig

Abstract

The invention provides a support mechanism for a rotary drill rig. The support mechanism comprises a revolving table, a swing arm, a luffing oil cylinder, a triangular support, a mast and a mast oil cylinder. One end of the swing arm and one end of the range receiving oil cylinder are hinged to the revolving table respectively. The other end of the swing arm and the other end of the luffing oil cylinder are hinged to the triangular support. One end of the mast oil cylinder is hinged to the mast, and the other end of the mast oil cylinder is hinged to the triangular support. The invention further provides the rotary drill rig with the support mechanism. According to the technical scheme, the mast is capable of leaning forwardly and backwardly, transportation height of the rotary drill rig is reduced effectively, short-distance moving and field changing of the rotary drill rig are achieved, height in the vertical direction and revolving radius of the mast can be adjusted, and positioning and large-range left and right swing of the mast in operation of the rotary drill rig are facilitated. The support mechanism is simple in structure, reasonable, high in stability, and wide in application range.

Description

technical field [0001] The invention relates to the field of drilling rigs, more specifically, to a support mechanism of a rotary drilling rig and a rotary drilling rig with the support mechanism. Background technique [0002] Rotary drilling rig is a common drilling and pouring construction machine in foundation construction at present, and the support mechanism is an important part of rotary drilling rig. It is the key component connecting the rotary table, mast and working mechanism. The mast is tilted and rotated on the crane or drilling rig, bearing the weight of the mast and the torque and external force in the working condition. [0003] At present, the support mechanisms of domestic and foreign rotary drilling rigs include masts and mast support mechanisms. Most of the mast support mechanisms mainly use parallelogram structures, small triangle structures, and large triangle structures. The mast support mechanism with parallelogram structure in the prior art can only...

AI Technical Summary

Problems solved by technology

In the prior art, the mast support mechanism with parallelogram structure can only achieve a backward inclination angle of less than or equal to 90 degrees, and cannot achieve forward inclination; and the included angle of the mast oil cylinder is too small, resulting in a large torque

In the prior art, the mast support mechanism with a large triangular structure is mainly borne by two diagonally braced mast cylinders; although it can achieve an inclination angle of less than or equal to 90 degrees forward, it cannot achieve backward inclination or a backward inclination angle Very small; and the vertical height of the entire mast and the adjustment range of the turning radius of the mast and drilling tools are small

[0004] In the prior art, the above-mentioned support structure has at least the following disadvantages: or because it cannot achieve a large angle of forward tilt, the height cannot be reduced during long-distance transportation, which increases the difficulty of transportation and transportation costs; or because it cannot achieve a large angle of backward tilt, resulting in large-scale The height of the drilling rig cannot be lowered during short-distance walking and transition, resulting in a large workload, labor-intensive and time-consuming disassembly of the large-scale drilling rig during short-distance walking; the mast cylinder of the large-scale drilling rig supporting mechanism has a large bearing capacity, resulting in a short service life; Or the height adjustment range of the mast in the vertical direction and the adjustment range of the mast gyration radius are too small, which is inconvenient for positioning and adjustment during drilling rig construction

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