Method for detecting hot strip steel unequal-height free loop

Abstract

The invention relates to a method for detecting a hot strip steel unequal-height free loop, comprising the following steps of, firstly, respectively installing a set of infrared loop detector at the inner arc side and the outer arc side of a hot steel strip free loop, wherein the two loop detectors are arranged on a same horizontal plane, distances from the two loop detectors to a cast roll and a loop guide roll are equal, and the two loop detectors are both arranged at the outer side of the cast roll and the outer side of the loop guide roll; installing the loop detectors on the plane parallel to the advancing direction of a cast strip and vertical to the width of the cast strip, wherein the centre line of a scanning detection angle of the two loop detectors is a same straight line; respectively measuring a same detection point on the free loop by the two loop detectors after starting working; obtaining angles of different loop heights along with the advancing of the cast strip; and calculating the actual height of the loop according to the angle corresponding to the height of the loop detected by the two detectors. With the adoptation of the method, an accurate measuring result of the free loop can be obtained.

Description

technical field [0001] The invention relates to a continuous casting process, in particular to a detection method for unequal-height free loops of hot-band steel. Background technique [0002] The free loop of hot strip steel refers to that in the production process of thin strip (such as thin strip continuous casting), in order to meet the process needs, in a certain link of the strip steel conveying process, two conveying rollers with a large span A section of free-sagging redundant section of strip material is formed between them. The purpose of forming this section of strip material redundant section is to provide buffer for the subsequent strip material processing procedure. [0003] For example, in the production of thin strip continuous casting, due to the limitation of the process, in order to obtain high-quality strip steel, it is necessary to carry out no-tension rolling or micro-tension rolling, so a certain amount of free loops are left in front of the rolling mi...

AI Technical Summary

Problems solved by technology

In practical application, because the heights of the two fulcrums forming the looper are inconsistent, the abscissa value of the lowest point of the free looper changes with the height of the looper, that is to say, the horizontal distance between the lowest point of the looper bottom and the detector C n is changing, as shown in Equation 3, so there is a measurement error in the measured result

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