Basic automation control system and control method for steel pipe online cooling

Abstract

The invention relates to the online heat treatment technology for steel pipe production, in particular to a basic automatic control system and control method for steel pipe online cooling. After the basic automation control system for the steel pipe online cooling receives the setting information sent by a process control computer for the steel pipe online cooling, through mutual coordination of systems and strict logic control, and the steel pipe online cooling process is fully automatic and accurately controlled. The systems mainly include a basic control system for a steel pipe online cooling production device, a water supply system, and a hydraulic system. The steel pipe online cooling production device is in parallel with a steel pipe original rolling line system, the steel pipe online cooling production device has a wide range of adjustable temperature drop, the controllable cooling steel pipe has a large wall thickness specification, automatic control accuracy is high, and pipeshape after cooling is good; not only can be used to achieve flexible process requirements of the steel pipe online cooling, but also the offline quenching process requirement of the steel pipe can beachieved, and stable production and smooth operation are ensured.

Description

technical field [0001] The invention relates to on-line heat treatment technology for steel pipe production, in particular to a basic automatic control system and control method for on-line cooling of steel pipes. Background technique [0002] On-line cooling of a certain cooling rate range is implemented on hot-rolled seamless steel pipes, the purpose is to improve the strength and toughness of steel pipes, replace off-line heat treatment, simplify the process, reduce energy consumption, and reduce costs. [0003] For the production process of hot-rolled seamless steel pipes, considering the stability of the rolling line and the smoothness of production, in order to reduce the deformation resistance of metal materials in the process of pipe piercing and rolling deformation, the heating and forming process of the current pipe billet is usually required to be relatively high. within the temperature range. High-temperature heating and high-temperature deformation will make it...

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Problems solved by technology

[0004] At present, some research institutions and manufacturers at home and abroad have carried out experimental research on controlled cooling of hot-rolled seamless steel pipes after rolling, but at present they mainly focus on the on-line normalization (heating) process and direct on-line quenching process. It is not used in large quantities on products, but only used for performance improvement of a small number of products, etc.

[0005] As for the steel pipe on-line cooling production device installed in parallel with the steel pipe production and rolling line, how to realize the control of the start and stop of the roller table at the basic automation level of the steel pipe, the sequence of turning over the pipe, and the removal of residual water in the pipe to meet the changing cooling process flow is currently unknown. precedent

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