Method for preventing band-break during continuous annealing process of band steel and its control system

A technology of annealing process and control system, applied in manufacturing tools, furnaces, heat treatment equipment, etc., can solve the problems of hysteresis, inability to prevent deviation in time, broken belt accidents, limited number of industrial TV monitoring devices, etc., to avoid belt breakage The effect of accident, installation and maintenance convenience

Active Publication Date: 2009-03-25
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the number of industrial TV monitoring devices installed is very limited, and the operator needs to determine the shape of the strip by visual inspection, so it is impossible to accurately and comprehensively understand the shape of the steel strip in the furnace
In addition, because the monitoring device is generally installed in the continuous annealing furnace, the control is lagging, and it is often impossible to prevent deviation and broken belt accidents in time

Method used

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  • Method for preventing band-break during continuous annealing process of band steel and its control system
  • Method for preventing band-break during continuous annealing process of band steel and its control system
  • Method for preventing band-break during continuous annealing process of band steel and its control system

Examples

Experimental program
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Effect test

no. 1 example

[0035] When the strip is suspended between the two supporting positions of the continuous annealing unit decoiler and the inlet looper (for example, the contact position of the conveyor roller and the strip), the tension is set to be small, so the strip basically assumes a shape under the action of gravity. Such as image 3 Shown in the shape of a suspension cable, the schematic diagram is a cross-sectional schematic diagram of the strip steel hanging between the two supporting positions of the continuous annealing unit decoiler and the inlet looper, which is taken along the strip conveying direction (hereinafter referred to as the longitudinal direction) Hereinafter, the cut surface is referred to as a longitudinal section. When the strip is divided into a plurality of long and narrow longitudinal regions along the longitudinal direction, the undulating shape of the strip surface makes the longitudinal regions of the strip suspended between the two conveyor rollers have different...

no. 2 example

[0068] The second embodiment of the method according to the present invention is described below.

[0069] In the first embodiment, only the strip shape data is used to set the passing speed and tension of the strip steel in the continuous annealing furnace. In this embodiment, the strip shape data is also used to set the strip correction angle.

[0070] When a unilateral wave occurs, due to the uneven distribution of tension on both sides of the strip, the strip deviation will inevitably occur. For this reason, a closed-loop feedback control composed of a deviation measurement device and a deviation correction mechanism is installed in the continuous annealing furnace. To be corrected. Such as Figure 6 As shown, the correction mechanism of the continuous annealing unit includes correction rollers 6a and 6b arranged in the traveling direction of the strip. By changing the angle between the correction rollers (that is, the correction angle of the strip), the traveling direction of...

no. 3 example

[0085]Figure 8 It shows a schematic diagram of a control system for implementing the method in the above-mentioned embodiment. The system includes a flatness detection unit 4 and a control unit 5.

[0086] Such as Figure 8 As shown, the flatness detection unit 4 is installed between the continuous annealing unit decoiler 1 and the entrance looper 2 to measure the strip shape data between the continuous annealing unit uncoiler and the entrance looper 2. The control unit 5 includes a board passing speed and tension setting module 5a and a correction roller included angle setting module 5b connected to the flatness detection unit 4 and a continuous annealing unit (not shown), wherein the module 5a is based on the flatness detection unit 4 The measured flatness data sets the speed and tension of the strip steel and instructs the continuous annealing unit to run at the set speed and tension. The module 5b sets the deviation correction based on the flatness data measured by the flatne...

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PUM

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Abstract

This invention provides a method preventing strip band-breaking during continuous annealing and its control system. It measures the panel data between the decoiler and the entry loop of the continuous annealing machine to assure the technique parameter. The control system includes: the panel testing unit equipped between the decoiler and the entry loop of the continuous annealing machineto test the panel data of the strip; the control unit connecting the panel testing unit and continuous annealing machine to assure the technique parameter according to the tested panel data and control the continuous annealing machine according to the technique parameter. In this invention, because the strip panel form has been tested before going into the annealing furnace, so it can control the panel-through speed, tensility and correction angle of the strip in time, effectively avoid the band-breaking accident. In addition, because the testing equipment is in front of the entry of the furnace, so the equipment and testing are convenient.

Description

Technical field [0001] The invention relates to metallurgical production technology, in particular to a method and a control system for preventing strip breakage during continuous annealing of strip steel. Background technique [0002] As the key production equipment of iron and steel enterprises, the productivity of the continuous annealing furnace for strip steel directly affects the production capacity of the enterprise. The surface of the strip is not a flat plane, but is like Figure 1a Or undulating as shown in 1b. When taken along the direction perpendicular to the strip conveying direction (hereinafter referred to as the transverse direction) as Figure 1a with 1b When the strip steel shown is obtained separately Figure 2a with 2b The cross-sectional schematic diagram shown is hereinafter referred to as a cross-section. in Figure 2a In the middle, the middle part of the cross section of the strip is convex upward, and this shape is called edge wave in the following; Fig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/56
Inventor 李山青
Owner BAOSHAN IRON & STEEL CO LTD
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