Automatic stabilized precision control device of the tundish in the center of the concasting

Abstract

The invention relates to an automatic stable accurate control device for the liquid level of continuous casting tundish. The non-contact liquid level gauge is set above the liquid steel in tundish and transfers the detected liquid level height signal of tundish to the control cabinet. By PLC programmable controller the liquid level height signal of tundish is transformed into the liquid level control signal, which is sent to the servo valve through amplifier. The servo valve is connected with the hydraulic cylinder. The invention confirms the height of liquid level in tundish accurately through the non-contact liquid level gauge. In the process of adjusting slag line, the liquid height in tundish is controlled accurately by setting while the liquid wave in tundish can be controlled accurately to decrease the liquid wave and the liquid wave range in tundish can be controlled in +-5mm.

Description

technical field [0001] The invention relates to a liquid level control device for a continuous casting tundish. Background technique [0002] The traditional tundish liquid level control method is to adjust the opening of the large tank slide plate according to the weight of molten steel in the tundish to ensure the stability of the tundish liquid level. The prerequisite for this production process to stably control the tundish liquid level is: each tundish The weight of the tundish body is basically the same, but due to the different times of use of the tundish, the weight of the tundish changes, so the height of the molten steel inside the tundish cannot be accurately controlled, and the height of the liquid steel level in the tundish cannot be adjusted. In addition, the traditional tundish flow control method has hysteresis, resulting in poor stability of the tundish liquid level, and the stability of the crystallizer liquid level is directl...

AI Technical Summary

Problems solved by technology

[0002] The traditional tundish liquid level control method is to adjust the opening of the large tank slide plate according to the weight of molten steel in the tundish to ensure the stability of the tundish liquid level. The prerequisite for this production process to stably control the tundish liquid level is: each tundish The weight of the tundish body is basically the same, but due to the different use times of the tundish, the weight of the tundish changes, so the height of the molten steel inside the tundish cannot be accurately controlled, and the height of the liquid steel level in the tundish cannot be adjusted

In addition, the traditional tundish flow control method has hysteresis, resulting in poor stability of the tundish liquid level, and the stability of the crystallizer liquid level is directly related to the fluctuation of the tundish liquid level. Due to the instability of the tundish liquid level, the crystallizer liquid level Unstable, resulting in unstable slab quality

[0003] Through patent retrieval, the current domestic tundish flow control method is to control the tundish liquid level by weight, and there is no other way to accurately control the tundish flow

Images