Hoisting method of large mill housing under limited hoisting height

Abstract

The invention relates to a hoisting method of a large mill housing under limited hoisting height. The method comprises the following steps: two supporting beams are manufactured through design, the position of a hoisting point is arranged according to the stress analysis, the two supporting beams are placed at both sides of the stress part of the housing and bound with a steel wire rope, two I-shaped steels are respectively welded at the both sides of a steel wire rope for the hoisting point, two workshop traveling cranes are hooked at the corresponding hoisting positions of the steel wire rope and synchronously hoisted, the large mill housing is hoisted slowly and erected, the traveling cranes are moved, the mill housing is vertically delivered above the foundation of the rolling mill, then the mill housing is slowly placed on a base and adjusted to meet the requirement of installation accuracy, and the constructor performs the next installation. The invention utilizes the original traveling crane in the workshop, one 150 t traveling crane is temporarily installed and fixed at the middle upper part of the housing through the supporting beams and is bound with the double beams in an opposite clamping way, and the double cranes perform lifting to cause the housing to be erected and the traveling cranes to be moved to the mounting position. The invention greatly improves the construction effect and solves the installation problem of the large-tonnage mill housing under limited hoisting height.

Description

technical field [0001] The invention relates to a special hoisting tool for quickly hoisting a frame of a hot-rolling continuous rolling mill and a hoisting method thereof. Background technique [0002] With the continuous development of science and technology, the market demand for wide and thick plates has become increasingly strong. In recent years, the use of large rolling mills in the steel industry has become more and more common, which has significantly improved the production efficiency of the factory. Generally, there are two methods for the installation of large rolling mill archways: [0003] 1. Before the factory roof is closed, use a large truck crane or crawler crane for hoisting; [0004] 2. Use two cranes to pass through a single spreader beam to lift the archway to the installation position, then erect the archway in the equipment foundation pit and find the alignment. [0005] The first option is basically impossible to achieve. Because the plant structu...

AI Technical Summary

Problems solved by technology

If the conventional hoisting method is adopted, not only the hoisting machinery cannot enter the site, but also the work of erecting the archway at attention is difficult to achieve

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