Hot-Rolled Steel Cooling Control for Wave Shape Uniformity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cooling methods for hot-rolled steel sheets with a wave shape in the rolling direction fail to achieve uniform cooling due to local contact with transportation rolls and aprons, leading to uneven heat dissipation and temperature variations.
Innovation Solution
An apparatus with a thermometer and shape meter measures temperature and shape changes, adjusting the cooling capabilities of the top and bottom surfaces to ensure uniform cooling by controlling the amount of heat dissipated from each surface based on real-time data, using a control device that computes average temperatures and changing speeds to determine optimal cooling directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional cooling methods are used on hot-rolled steel sheets with wave shapes, then cooling is applied to the steel sheet, but uniform cooling is not achieved due to local contact with transportation rolls and aprons causing uneven heat dissipation
Solution Approach 1:
The patent applies different cooling strategies to different regions of the steel sheet based on its wave shape characteristics. The cooling apparatus is divided into multiple cooling units that can independently adjust cooling intensity, allowing localized cooling adjustments to compensate for uneven heat dissipation caused by wave shapes and contact points with transportation rolls.
Solution Approach 2:
The cooling apparatus dynamically adjusts cooling parameters based on real-time detection of steel sheet temperature and shape. The control unit modifies cooling water flow rates and temperatures adaptively during the cooling process to maintain uniform cooling despite variations in steel sheet geometry and contact conditions.
2Productivity
If the steel sheet is transported at normal speed through the cooling section, then production efficiency is maintained, but contact with transportation rolls causes localized over-cooling and temperature variations
Solution Approach 1:
The patent employs detection units that continuously monitor steel sheet temperature and shape during transport through the cooling section. This feedback information is transmitted to the control unit, which adjusts cooling water flow rates and temperatures in real-time to compensate for localized over-cooling at contact points while maintaining overall cooling efficiency.
Solution Approach 2:
The cooling apparatus changes cooling parameters such as water flow rate, water temperature, and cooling unit activation patterns based on detected steel sheet conditions. This allows the system to maintain high productivity while preventing localized temperature deviations caused by contact with transportation rolls.
3Device complexity
If cooling water is sprayed uniformly across the steel sheet surface, then cooling apparatus simplicity is maintained, but wave shapes cause uneven water distribution and non-uniform cooling
Solution Approach 1:
The cooling apparatus is segmented into multiple independent cooling units, each capable of independent control. This segmentation allows the system to apply different cooling intensities to different regions of the steel sheet, compensating for uneven water distribution caused by wave shapes without requiring complex overall system redesign.
Solution Approach 2:
The system adjusts cooling parameters such as water flow rate and temperature for each cooling unit based on detected steel sheet conditions. This parameter variation across different cooling units achieves uniform cooling despite the simplicity of the individual cooling mechanisms.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for precise adjustment of cooling capabilities, resulting in uniform cooling of hot-rolled steel sheets by minimizing temperature standard deviations and preventing uneven cooling caused by wave shapes.
Implementation Method 1
controls at least one of an amount of heat dissipated from the top surface by cooling and an amount of heat dissipated from the bottom surface by cooling of the hot-rolled steel sheet
Implementation Method 2
The cooling apparatus 211 sprays the cooling water on the top surface of the hot-rolled steel sheet H moving on a run-out table from the top in the vertical direction in a water jet form through a cooling nozzle
Implementation Method 3
a thermometer that measures the temperature of the hot-rolled steel sheet on a downstream side of the cooling section
Implementation Method 4
a shape meter that measures a shape of the hot-rolled steel sheet on the downstream side of the cooling section
Implementation Method 5
the portions that locally come into contact with the transportation rolls 220 or the aprons become more easily cooled than other portions due to heat dissipation by contact
Data Source
AI summary
The apparatus for cooling a hot-rolled steel sheet of the invention includes a thermometer that measures the temperature of the hot-rolled steel sheet; a shape meter that measures a shape of the hot-rolled steel sheet; a top side cooling device that cools a top surface of the hot-rolled steel sheet in a cooling section; a bottom side cooling device that cools a bottom surface of the hot-rolled steel sheet in the cooling section; and a control device that controls at least one of an amount of heat dissipated from the top surface by cooling and an amount of heat dissipated from the bottom surface by cooling of the hot-rolled steel sheet in the cooling section by controlling the top side cooling device and the bottom side cooling device based on temperature measurement results and shape measurement results.