Cooling Bar Nozzle Layout for Uniform Rolled Material Cooling
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Solution Overview
Problem
Existing cooling devices for rolled materials struggle to effectively level out temperature differences transversely to the transport direction during hot rolling, which can impair the quality of the rolled material.
Innovation Solution
A cooling bar system utilizing full jet nozzles with a spray chamber and distribution chamber, allowing for variable nozzle density and outlet diameters transversely to the transport direction, and a cooling device with multiple cooling bars that can be controlled based on temperature distribution, ensuring uniform cooling and reducing temperature differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional cooling devices are used to cool rolled material, then the rolled material is cooled, but temperature differences transversely to the transport direction cannot be effectively leveled out
Solution Approach 1:
The cooling bar implements local quality by varying the nozzle density and outlet diameters transversely across its width. The nozzle density is highest in the central region and decreases toward the edge regions, allowing different parts of the rolled material to receive customized cooling intensities. This resolves the contradiction by achieving transverse temperature uniformity (improving_feature) through a strategically designed but not overly complex nozzle arrangement (managing worsening_feature).
Solution Approach 2:
The cooling bar is segmented into multiple functional zones along its transverse width, with each zone having a specific nozzle density and outlet diameter configuration. The central region has higher nozzle density for intense cooling, while edge regions have lower density. This segmentation allows the device to address transverse temperature differences effectively without requiring multiple separate cooling devices, thus improving temperature uniformity while keeping the overall device structure manageable.
2Temperature
If high coolant flow is used to increase cooling effect, then heat dissipation improves, but energy consumption increases
Solution Approach 1:
The cooling system applies local quality by delivering coolant at different flow rates to different transverse zones. The central region receives higher coolant flow for intensive cooling where temperature differences are most pronounced, while edge regions receive lower flow. This localized approach improves overall cooling efficiency by concentrating coolant where most needed, thereby reducing total energy consumption compared to uniform high-flow cooling across the entire width.
Solution Approach 2:
The system changes the coolant flow parameter transversely by varying nozzle density and outlet diameters. This parameter variation allows the cooling system to achieve effective heat dissipation in the central region without applying excessive coolant flow across the entire width, thus improving cooling efficiency while minimizing energy consumption.
3Temperature
If nozzle density is increased to improve cooling uniformity, then temperature leveling improves, but device complexity and manufacturing cost increase
Solution Approach 1:
The cooling bar implements local quality with a continuous gradient of nozzle density from center to edges, rather than discrete high-density clusters. This gradual variation achieves temperature uniformity while maintaining manufacturability, as the nozzle pattern can be produced using standard manufacturing techniques without requiring excessively complex tooling or assembly procedures.
Solution Approach 2:
The cooling bar is segmented into zones with progressively varying nozzle densities, creating a manageable manufacturing structure. Each zone can be manufactured as a modular section, allowing the overall complex pattern to be produced through repeated modular units, thus reducing manufacturing complexity while maintaining the beneficial transverse temperature distribution.
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
The cooling bar system achieves effective heat dissipation with high impact pressure, reduced energy consumption, and improved robustness, while the cooling device adapts to temperature variations, ensuring uniform cooling and minimizing temperature differences across the rolled material.
Implementation Method 1
A coolant jet of a coolant with an almost constant jet diameter may be output through each jet nozzle to the rolled material in an output direction... achieves effective heat dissipation with high impact pressure
Implementation Method 2
A distribution chamber for intermediate storage of the coolant is connected to the spray chamber by at least one through opening for enabling filling the spray chamber with coolant from the distribution chamber
Data Source
AI summary
A cooling bar (1) for cooling rolled material (5) being moved in a transport direction (3) and in particular for reducing temperature differences in the temperature of the rolled material (5) transversely to the direction of transport (3). The cooling bar (1) has several full jet nozzles (11) by means of which a coolant beam of a coolant with an approximately constant jet diameter can be distributed to the rolling stock (5) in the direction of distribution (15). A cooling device has at least two cooling bars (1) of that type. The cooling bars extend transversely to a transport direction, one behind the other. Each cooling bar has a respective different pattern of jet nozzles and selection of applicable pattern of jet nozzles in their respective bars selectively cools the rolled material transversely to the transport direction.