Method and device for controlling system security under light press of slab

Abstract

The embodiment of the invention provides a method and a device for controlling the system security under the light press of a slab. The method comprises the following steps: monitoring an offset value of the system under the light press of the slab, wherein the offset value is equal to an absolute value of a difference value between an actual value and a set value of a roll gap; when the offset value is judged to exceed the offset set value with first-level security, stopping the action that single oil cylinder controls the roll gap, gradually accumulating the offset value with first-level security to a preset step value at a scheduled time interval in the follow-up process, and comparing the accumulated value with the current offset value of the system; if the current offset value of the system does not exceed the accumulated value, stopping the accumulation process and restoring the control on the roll gap, or continuously carrying out the accumulation and comparison process until the accumulated value is greater than or equal to an offset set value with second-level security, and stopping the action of controlling the roll gap.

Description

technical field [0001] The invention belongs to the field of continuous casting machine control. Background technique [0002] The dynamic light pressing technology of slab continuous casting machine is one of the most important technologies for slab continuous casting machine to change the quality of cast slab. The core components of the control under the dynamic light pressure technology - the oil cylinder and the displacement sensor are in the sector of the slab continuous casting machine, in a relatively harsh environment, high temperature and humidity, making these core components relatively vulnerable. In order to ensure the smooth implementation of dynamic soft reduction technology, it is necessary to develop a safe control method. [0003] The general safety control method in the prior art is to set three control bits according to the roll gap position value of the sector, such as figure 1 As shown, they are warning bit, alarm bit and emergency bit (or called fault...

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Problems solved by technology

[0004] However, in the above-mentioned prior art, once the roll gap value exceeds the alarm level, it will be locked, and no longer be controlled, and the cause of the roll gap out of control will not be distinguished. If the system is locked because of an instantaneous event and a temporary automatic recovery event, it is not conducive to The correct handling of these events, while affecting the normal production

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