A high-strength jib and a boom using it

Abstract

The invention discloses a high-strength fly jib and a lazy arm using the same. The high-strength fly jib comprises four main pipes, a plurality of front branch pipes and a plurality of back branch pipes; the front ends of the four main pipes are connected through the front branch pipes, near end parts of the tail ends of the four main pipes are connected through the back branch pipes, and therefore a frame is formed; the longitudinal section of the frame is a downwards-inclined trapezoid with the width gradually decreased from the head end to the tail end, and the cross section of the frame is an isosceles trapezoid with the width gradually decreased from the head end to the tail end. Four top surface transverse web members with the distances from the head end to the tail end gradually increased are arranged between the front branch pipes and the back branch pipes in parallel, the supporting effect on the front main pipe and the back main pipe of the top face is achieved, the rigidity is improved, and bending stress borne by the front main pipe and the back main pipe of the top face during jacking operation is reduced. In addition, two top face strengthening assemblies are symmetrically arranged on the top face of the frame along the central axis of the frame, the supporting effect on the four top surface transverse web members is achieved, and the top face strength of the frame is improved.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a high-strength auxiliary arm and a boom using the same. Background technique [0002] With the rapid development of offshore wind power and oil exploration industries, the demand for using lifting equipment to install and maintain offshore platforms is increasing. As the improvement and extension of the main arm function, the jib of the crane can effectively improve the working range and lifting height of the crane, and is an important part of the crane. The existing jib has low bearing capacity, poor stability and low ability to resist wind and waves. Moreover, the structural strength of the existing auxiliary arm is not high, the stress cannot be effectively dispersed, the stress is uneven, and damage is likely to occur. Contents of the invention [0003] The object of the present invention is to propose a high-strength auxiliary jib and a boom using the same, which ca...

AI Technical Summary

Problems solved by technology

The existing jib has low bearing capacity, poor stability, and low ability to resist wind and waves

Moreover, the structural strength of the existing auxiliary arm is not high, the stress cannot be effectively dispersed, the force is uneven, and damage is prone to occur

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