A jib device for a crane

Abstract

The invention relates to a suspension arm device of a crane. The suspension arm device of the crane comprises a hoisting structure, a main lifting arm and a variable-amplitude suspension arm, the mainlifting arm is composed of four sections of telescopic sleeves, the first sleeve is arranged on the outermost side, the fourth sleeve is arranged on the innermost side, a first hook mounting seat isarranged at the top of the fourth sleeve, and a first hook is arranged on the first hook mounting seat; and a first connecting truss is arranged above the first hook mounting seat, a blunt angle triangular truss is arranged above the first connecting truss, the first acute angle part of the blunt angle triangular truss faces upwards, the variable-amplitude suspension arm comprises an acute angle triangular truss, a first main truss, a second main truss and a variable-amplitude driving device, the top corner part of the acute angle triangular truss is hinged to the first acute angle part of theblunt angle triangular truss, and the first main truss is fixedly arranged at the upper part of the acute angle triangle truss. The suspension arm device comprehensively solves the difficult problemsof lifting and hoisting of overweight, super high and oversized blades of the large wind generating unit

Description

technical field [0001] The invention relates to a boom device of a crane. Background technique [0002] Wind power refers to converting the kinetic energy of wind into electrical energy. Wind is a non-polluting energy source. Using wind power to generate electricity is very environmentally friendly and can generate huge amounts of electricity. Therefore, more and more countries pay more attention to wind power generation. As a clean and renewable energy, wind energy has been paid more and more attention by countries all over the world. Its reserves are huge. The global wind energy is about 2.74×10^9MW, of which the usable wind energy is 2×10^7MW, which is 10 times larger than the total amount of water energy that can be developed and utilized on the earth. [0003] my country is rich in wind energy resources, and the wind energy reserves that can be developed and utilized are about 1 billion kW. Among them, the onshore wind energy reserves of Chinese wind farms are about 2...

AI Technical Summary

Problems solved by technology

At present, the wind turbine is hoisted to the top of the wind tower and installed and connected to complete the installation and construction. The entire construction period is long, and a large-scale special floating crane is required. The construction is difficult, expensive, and risky.

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