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One-step integral hoisting method for Y-shaped three-way-type downcomer of blast furnace

An overall hoisting and general technology, applied in blast furnaces, blast furnace details, furnace types, etc., can solve the difficulty of positioning the Y-type three-way descending pipe, the easy swing of the Y-type three-way descending pipe, and the high rental cost of large cranes. problems, to achieve the effect of saving project cost and construction period, saving rental costs, and heavy weight

Active Publication Date: 2015-09-02
CHINA MCC17 GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the shape of the three-way downcomer is an inverted "Y" shape, it is large in size, long in span, and heavy in weight. It requires a large crane to operate. The rental cost of large cranes is high. At the same time, the construction site is narrow and special, and the hoisting is difficult. , The positioning of the Y-shaped three-way downpipe is difficult, and the hoisting depends on the reasonable selection of the lifting point by the operator. If there is a deviation, the Y-shaped three-way downpipe is easy to swing, resulting in repeated hoisting, which not only delays the construction period, but also poses safety hazards

Method used

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  • One-step integral hoisting method for Y-shaped three-way-type downcomer of blast furnace
  • One-step integral hoisting method for Y-shaped three-way-type downcomer of blast furnace

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Embodiment Construction

[0012] Referring to the accompanying drawings, the blast furnace Y-type three-way downcomer overall hoisting method for one-time placement includes the following process steps:

[0013] 1. For the welding of the Y-shaped three-way downcomer of the blast furnace, the left branch 1, the right branch 2 and the main pipe 3 are butt-welded on the assembly platform to form a Y-shaped tee. The structure, specification and model of the left branch and the right branch are exactly the same. The branch pipe and the right branch pipe are arranged symmetrically with the center of the main pipe as the central axis. Both the left branch pipe and the right branch pipe include straight pipes and inclined pipes. The lifting points are respectively set at the gravity center of the straight pipe and the inclined pipe. Lifting point 5 of the inclined pipe of the branch pipe, lifting point 6 of the straight pipe of the right branch pipe, and lifting point 7 of the inclined pipe of the right branch ...

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Abstract

The invention discloses a one-step integral hoisting method for a Y-shaped three-way-type downcomer of a blast furnace. The one-step integral hoisting method includes the technological steps of 1, welding of the Y-shaped three-way-type downcomer of the blast furnace, 2, hoisting preparation and 3, hoisting completion. According to one-step integral hoisting method, reasonable structure and safety and reliability in use are achieved; compared with conventional hoisting modes (hoisting at upper and lower positions), the one-step integral hoisting method has the advantages that the turning radius of a crane is reduced, tonnage of the crane is reduced, rent expense of a large crane and project cost are saved, construction period is shortened, mounting quality of the Y-shaped three-way-type downcomer of the blast furnace is improved effectively, and construction cost is reduced.

Description

technical field [0001] The invention belongs to the field of hoisting, in particular to a method for overall hoisting and one-time positioning of a Y-shaped three-way downcomer of a blast furnace. Background technique [0002] In order to ensure that the blast furnace downpipe is conveniently connected in the air, the open elbow is selected to be docked at the straight section, and the downpipe is divided into upper, middle and lower sections. The upper section and the lower section are respectively installed with the upper and lower elbows, and then the middle section is installed. The middle section is Y-type three-way downpipe. [0003] At present, in the process of blast furnace installation in the metallurgical industry, the construction site is often limited due to design and process requirements. The type of the middle section of the blast furnace downcomer is also different, including straight-through type, Y-type tee, and spherical shape. Since the inclined br...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00C21B7/00
Inventor 王庆胜吴梦菊翁勇荣
Owner CHINA MCC17 GRP
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