Thermocouple installation reverse sequence online identification method and device for crystallizer bleed-out forecasting system

Abstract

The invention relates to a thermocouple installation reverse sequence online identification method and device for a crystallizer bleed-out forecasting system. A plurality of rows and columns of thermocouples are set on a crystallizer copper plate of the crystallizer bleed-out forecasting system, the thermocouples are enabled to be connected with different interfaces of collection equipment, and the identification method comprises the following steps for each row of thermocouples, specifically, in the process from casting to throwing, temperature data of the thermocouples in a preset time period is obtained according to a preset sampling period, and a temperature time sequence is formed; for each thermocouple, a temperature change continuous curve equation f (t) formed by the temperature time sequence of the thermocouple is obtained, and the moment when the maximum first derivative of the f (t) is obtained is used as a measuring point; and for the thermocouples in the same column, whether the thermocouples are installed in a reverse sequence is determined by judging whether the measurement point values corresponding to the interfaces corresponding to the thermocouples from bottom totop are sequentially increased or not. The thermocouple installation reverse sequence online identification method and device are suitable for slabs, square billets, round billets, special-shaped billets, sheet billets, CSP and ESP.

Description

technical field [0001] The invention relates to the technical field of continuous casting, in particular to a method for on-line identification of thermocouple installation in reverse sequence in a mold breakout forecast system. Background technique [0002] In continuous casting production, bonding refers to the rupture of the thinner primary slab shell near the meniscus. After the liquid steel seeps out, it contacts with the copper plate of the crystallizer and sticks. Tear-healing and moving down continuously, when it reaches the lower part of the crystallizer, due to the existence of the air gap, the support constraint of the copper plate is lost, and the molten steel overflows from the crack, causing a production accident phenomenon of steel leakage. [0003] Steel breakout not only endangers the safety of on-site operators and seriously damages the continuous casting equipment, but also will lead to forced interruption of continuous casting production, and a substantia...

AI Technical Summary

Problems solved by technology

[0005] During the installation of thermocouples, they are basically installed separately in the same column, so there will be no installation errors in different columns. However, when installing thermocouples in the same column, there may be errors in the wiring of the thermocouple acquisition equipment. , the thermocouples are installed in the wrong order, for example, the thermocouples in the first row are installed in the third row, so that the measured temperature is quite different from the real temperature distribution of the copper plate, which can lead to the temperature measurement obtained by the acquisition device The data is not consistent with the real thermal distribution of the copper plate, which leads to missed or false alarms in the steel breakout early warning system

[0006] Moreover, since the process of molten steel injection in the production process is in a turbulent state, it often appears inconsistent with the ideal process, thus causing interference to the accurate identification of installation abnormalities

[0007] From the current application practice, it is often seen that the steel breakout false alarm phenomenon is caused by the reverse order of the installation of the thermocouple acquisition equipment. The main detection work of installation anomalies is concentrated in the process of offline installation, and it is difficult to avoid the anomaly of reverse order of installation, which leads to frequent false positives and false positives, and even develops into steel breakout production accidents

[0008] For the above problems, there is currently no good solution

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