One-line repair device for inner holes of blast furnace tuyere-cooler casing

Abstract

The invention discloses an one-line repair device for the inner holes of a blast furnace tuyere-cooler casing. According to the one-line repair device for the inner holes of a blast furnace tuyere-cooler casing, a base is arranged on a blast furnace tuyere platform, a reduction gearbox and a driving motor are arranged on the base, a rotating shaft is connected with the output shaft of the reduction gearbox through a coupler, a conical positioning ring is arranged on one side of the tuyere-cooler casing, the rotating shaft is located on the tuyere-cooler casing and the inner ring of the conical positioning ring through a first annular fixing block, a second annular fixing block and the corresponding rolling bearing, a cross positioning block is arranged on the rotating shaft and located inside the tuyere-cooler casing, a turning tool base, a turning tool and a turning tool rest are arranged on the cross positioning block in sequence, the end face of the turning tool base is a bevel, a tool feeding handle is arranged on the turning tool base, and the turning tool and the turning tool rest are driven by the tool feeding handle to move along the end face of the turning tool base. By using the one-line repair device for the inner holes of a blast furnace tuyere-cooler casing, the blast furnace tuyere-cooler casing can be repaired on line, the positioning accuracy of the center of the blast furnace tuyere can be guaranteed, affect caused by cutting operation on the furnace shell of a blast furnace is avoided, the efficiency of repair on the blast furnace tuyere-cooler casing is improved, and the equipment maintenance cost is reduced.

Description

technical field [0001] The invention relates to an online repair device for the inner hole of a large sleeve of a blast furnace tuyere. Background technique [0002] The blast furnace tuyere is an important equipment on the blast furnace of the ironworks. The high-temperature hot air blown in from the blast furnace tuyere oxidizes and burns the coke at the bottom of the furnace to generate CO, and the CO reduces the iron that originally existed in the form of oxide during the high temperature rise. The blast furnace tuyere is composed of a large tuyere sleeve, a middle tuyere sleeve, and a small tuyere sleeve in sequence, wherein the large tuyere sleeve and the blast furnace shell are welded as a whole. During long-term use, the large tuyere sleeve is easily deformed under the influence of high temperature in the furnace, the size of the inner hole of the large tuyere sleeve changes, and the contact surface between the large tuyere sleeve and the middle sleeve of the tuyere ...

AI Technical Summary

Problems solved by technology

During long-term use, the large tuyere sleeve is easily deformed under the influence of high temperature in the furnace, the size of the inner hole of the large tuyere sleeve changes, and the contact surface between the large tuyere sleeve and the middle sleeve of the tuyere is not dense, resulting in air leakage from the blast furnace tuyere. As a result, the heating in the furnace is uneven, the furnace charge is not completely melted, and the mixing is uneven, thus affecting the quality and output of blast furnace production.

[0003] After the blast furnace tuyeres are deformed, the deformed tuyeres are usually cut off from the furnace shell, and then new tuyeres are re-welded on the furnace shell. This repair method is likely to cause deformation of the furnace shell, making the center of the blast furnace tuyere and the center of the blast furnace body Inconsistency will also cause uneven heating in the furnace, incomplete melting of the furnace charge, and uneven mixing, which will affect the quality and output of the blast furnace production; Replacement of the shell increases the workload of the repair and increases the maintenance cost of the equipment

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