Device for controlling temperature uniformity of strip steel before entering zinc pot and using method of device

Abstract

The invention relates to the field of a hot dipping process which uses molten zinc or cadmium or an alloy coating material based on the molten zinc or cadmium and does not influence the shape, in particular to a device for controlling temperature uniformity of strip steel before entering a zinc pot and a using method of the device. The device for controlling the temperature uniformity of the strip steel before entering the zinc pot comprises a heating roller (11), a sink roller (12), a furnace nose (13), the strip steel (14), a heat treatment furnace (15) and the zinc pot (16), and is characterized in that the heating roller (11) comprises a temperature thermocouple (1), a thermocouple compensation lead wire (2), an induction heating body (3), a bearing (4), a slip ring (5), a mandrel (6), a roller body (7), a driving shaft (8), a middle shaft sleeve (9) and a temperature control device (10). The using method of the device for controlling the temperature uniformity of the strip steel before entering the zinc pot is characterized by comprising the following steps of (1) measuring, (2) calculating, (3) adjusting, and (4) safety control. By means of the device and method, the temperature control is made uniform.

Description

technical field [0001] The invention relates to the field of hot-dip coating technology using molten zinc or cadmium or alloy coating materials based on them without affecting the shape, specifically a control device for temperature uniformity of strip steel before entering the zinc pot and its application method . Background technique [0002] Before the steel strip is galvanized, it needs to be heat-treated in an annealing furnace, and the strip steel is conveyed in the heating section, soaking section, cooling section and other process sections of the annealing furnace through several furnace rollers. At this time, if the heat-treated narrow steel strip is conveyed by the furnace roller, the temperature of the middle part of the furnace roller will increase due to the heat transfer from the steel strip, while the two ends of the furnace roller will be cooled relatively due to exposure to the air. Low. In this case, if the strip steel is switched to wide-band steel, the ...

AI Technical Summary

Problems solved by technology

[0003] After heat treatment in the annealing furnace, the strip steel will be alloyed after being galvanized in the zinc pot. Because the temperature of the strip steel in the width direction is not uniform, it is easy to cause the edge of the strip steel during alloying treatment after galvanizing. Quality defects such as incomplete alloying, white edges, spots and groove marks, etc., especially when switching between wide-band steel and narrow-strip steel

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