Cooling Bar Nozzle Patterns for Transverse Rolled Material Temperature Control
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Solution Overview
Problem
Existing cooling devices for rolled materials during hot rolling struggle to effectively level out temperature differences transversely to the transport direction, affecting the quality of the rolled material.
Innovation Solution
A cooling device featuring multiple full jet nozzles with varying nozzle densities and outlet diameters arranged transversely to the transport direction, combined with a spray chamber and distribution chamber design, allows for efficient coolant distribution and reduced pressure gradients, enabling flexible control of cooling effects based on temperature distribution.
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. Different regions of the cooling bar have different numbers and sizes of nozzles, allowing targeted cooling intensity to be applied to different transverse zones of the rolled material. This enables effective leveling of temperature differences across the material width while maintaining high cooling efficiency through optimized local cooling patterns.
2Temperature
If multiple spray bars with individually controllable valves are used, then temperature distribution can be influenced, but the device complexity increases
Solution Approach 1:
The cooling bar is segmented into multiple transverse zones with different nozzle densities and outlet diameters, allowing independent optimization of cooling in each zone. This spatial segmentation achieves temperature distribution control without requiring complex individual valve devices for each nozzle, as the segmentation is built into the physical structure of the cooling bar itself.
Solution Approach 2:
The cooling bar design allows the system to self-regulate temperature distribution through its fixed transverse nozzle density and diameter variations. The structure itself provides the temperature distribution control function without requiring active control systems or complex valve mechanisms, simplifying the overall device while maintaining control capability.
3Temperature
If coolant is applied to positions with increased temperature, then temperature differences can be reduced, but the cooling uniformity across the width becomes difficult to maintain
Solution Approach 1:
The cooling bar applies local quality by having different nozzle densities and outlet diameters in different transverse regions. This allows the system to provide intensified cooling to hot zones and reduced cooling to cooler zones simultaneously, achieving both temperature difference reduction and cooling uniformity across the material width through optimized local cooling characteristics.
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 solution effectively reduces temperature differences in rolled materials by adapting cooling patterns to temperature distributions, improving cooling efficiency and uniformity while minimizing energy consumption and mechanical sensitivity.
Implementation Method 1
Each full jet nozzle (11) outputs a coolant jet (16) of a coolant (18) with an almost constant jet diameter through its outlet opening (22) to the rolled material (5)
Implementation Method 2
A distribution chamber (9) for intermediate storage of the coolant is connected to the spray chamber (7) by at least one through opening (13) for enabling filling the spray chamber (7) with coolant from the distribution chamber (9)
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.