Device and method for measuring thickness of zinc layer in continuous hot galvanizing machine set

Abstract

The invention provides a device for measuring thickness of a zinc layer in a continuous hot galvanizing machine set. The continuous hot galvanizing machine set comprises an air knife, a slewing roller and a tension roller, wherein the air knife is used for performing galvanizing treatment on a steel strip, and the slewing roller and the tension roller are used for outputting the steel strip afterbeing galvanized and cooled. The device for measuring the thickness of the zinc layer comprises a length encoder, a zinc layer thickness gauge, a steel strip length monitoring device and a zinc layercontrol parameter storage device, wherein the length encoder is arranged on the tension roller and is used for counting the length of the steel strip; the zinc layer thickness gauge is arranged behind the slewing roller and is used for measuring the thickness of the zinc layer; the steel strip length monitoring device is respectively connected with the length encoder and the zinc layer thickness gauge; and the zinc layer control parameter storage device is connected with the steel strip length monitoring device. The device and method for measuring the thickness of the zinc layer, provided by the invention, can be used for realizing the accurate correspondence between the thickness of the zinc layer on a specific position of the steel strip and other parameters used for controlling the thickness of the zinc layer on the position.

Description

technical field [0001] The invention relates to a hot-dip galvanizing process, more specifically, a device and method for measuring zinc layer thickness in a continuous hot-dip galvanizing unit. Background technique [0002] Usually, strip steel is galvanized before leaving the factory to enhance corrosion resistance and aesthetic appearance. In the cold-rolled continuous hot-dip galvanizing process, the galvanizing unit is usually used to complete the galvanizing process. Specifically, see figure 1 , is a schematic diagram of a commonly used galvanizing line for galvanizing operations. As shown in the figure, after the steel strip 1 is annealed through the annealing furnace 2, it enters the zinc pot 5 with the sinking roll 6 through the furnace nose 4 with the tension roll 3, and the molten metal zinc in the zinc pot 5 is adsorbed on the annealed After that, on the surface of the steel strip 1, the air knife 7 controls the weight of the zinc layer per unit area on the su...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a device and method for measuring the thickness of the zinc layer in a continuous hot-dip galvanizing line, to accurately reflect the exact situation of each control parameter of the air knife at a specific moment, thereby solving the above-mentioned zinc layer weight measurement value The prediction model brought about by the hysteresis of the control parameters of the corresponding air knife is still unable to accurately control the weight of the zinc layer

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