Large triangular structure derricking mechanism for rotary drilling rig with auxiliary jacking mechanism

Abstract

The invention discloses a large triangular structure derricking mechanism for a rotary drilling rig with an auxiliary jacking mechanism, relating to engineering machinery. In the mechanism, the side length of the large triangular structure is adjustable, and an initial lifting hydro-cylinder and an initial lifting arm of a mast have large torque to fulfill use of the rotary drilling rig of over 18 Newton meters; a cylinder body of a left-right inclined strut hydro-cylinder is rigidly connected with a support bar; a piston rod is articulated with a rotary platform; the support bar is articulated with an upper sliding seat; a crank arm is articulated with the rotary platform and a lower sliding seat 6 respectively, and the upper sliding seat and the lower sliding seat are in sliding matched connection with the mast through a guiding mechanism, and are connected with a derricking hydro-cylinder respectively; one end of the initial lifting arm of the mast is articulated with the rotary platform, and the other end of the initial lifting arm of the mast is articulated with the initial lifting hydro-cylinder; the initial lifting hydro-cylinder is articulated with the rotary platform; a supporting seat is arranged at the upper end of the initial lifting arm of the mast; the mast falls on the supporting seat when lying horizontally; a mast up and down displacement hydro-cylinder is arranged between the mast and the rotary platform; and when the upper plane of a drill hole is higher or lower than the lower plane of a track, the mast can move upwards or downwards.

Description

technical field [0001] The invention relates to an engineering machine for foundation construction, in particular to a high-torque rotary drilling rig with an auxiliary jacking mechanism. Background technique [0002] Rotary drilling rigs are widely used in various constructions such as high-rise buildings, highways, bridges, railways, ports, tunnels, subways, etc. The luffing mechanism of the rotary drilling rig is a mechanism that connects the drill mast and the chassis. The luffing mechanism of the existing rotary drilling rig includes a parallelogram small triangle structure luffing mechanism, a self-lifting large triangle structure luffing mechanism and a self-lifting large triangle structure luffing mechanism. The luffing mechanism with parallelogram small triangle structure, the upper and lower support points of the drill mast are relatively close, the number of hinge points is large, the cumulative clearance of assembly is large, the working stability of the drill ma...

AI Technical Summary

Problems solved by technology

It overcomes the shortcoming of poor working stability of the parallelogram small triangle structure luffing mechanism and improves the construction quality, but there are also some unsatisfactory places:

[0004] 1. The left and right diagonal bracing cylinders are hinged with the drill mast as a fixed point, and the large triangle structure cannot change the amplitude

[0005] 2. The drill mast lies flat on the rotary platform, and the initial lifting is difficult. The rotary drilling rig with a torque of more than 18 tons cannot be used. The drill mast and the chassis are transported separately during transfer.

[0006] 3. The lower end of the drill mast is hinged with the rotary platform, the drill mast cannot move up and down, and it is inconvenient to drill deep holes

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