Modular Guiding Roll Cooling and Maintenance in Continuous Casting
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Solution Overview
Problem
Guiding rolls in continuous casting plants face high wear and maintenance costs due to complex designs and inefficient cooling, leading to costly replacements and potential damage during maintenance.
Innovation Solution
A modular guiding unit with tubular elements and coaxial hubs allows for efficient cooling and easy replacement of wear-prone components, using grooves on the outer surface for coolant channels and cylindrical sleeves without through holes, enabling effective cooling and reducing maintenance time and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If solid body rolls with central or peripheral cooling are used, then cooling effectiveness is improved, but manufacturing cost and production time increase significantly
Solution Approach 1:
The roll is divided into two separate tubular elements (inner and outer) that can be manufactured independently and assembled together. This segmentation allows each element to be produced using simpler, more cost-effective processes while maintaining the cooling effectiveness of the integrated structure.
Solution Approach 2:
The roll employs a composite structure with an inner tubular element and an outer tubular element made from different materials or with different properties. This composite design enables optimized cooling channels in each element while reducing overall manufacturing complexity and cost compared to a solid body roll.
2Ease of manufacture
If rolls with jacket keyed on a shaft are used, then manufacturing cost is reduced, but disassembly and replacement become complex and damaging
Solution Approach 1:
The roll structure is segmented into an inner tubular element and an outer tubular element that can be independently removed. The outer element can be slipped off the inner element without requiring pressing operations, enabling simple maintenance and replacement while keeping manufacturing costs low.
3Ease of manufacture
If a single central cooling channel is used in the inner shaft, then manufacturing is simplified, but cooling effectiveness of peripheral zones decreases
Solution Approach 1:
The cooling system provides different cooling configurations for different zones of the roll. The inner tubular element can have central cooling channels while the outer tubular element provides peripheral cooling channels, ensuring that both the central and peripheral zones receive adequate cooling appropriate to their specific thermal requirements.
Solution Approach 2:
The cooling architecture transitions from a single-dimensional central channel to a multi-dimensional cooling system by adding the outer tubular element with its own cooling channels. This creates a layered cooling approach that addresses thermal requirements in both radial and axial dimensions simultaneously.
4Temperature
If peripheral cooling channels are made in the jacket, then cooling effectiveness is improved, but sealing complexity and clogging risk increase
Solution Approach 1:
The cooling system is segmented into inner and outer tubular elements with separate cooling channels. This segmentation isolates the cooling circuits, reducing sealing requirements and minimizing the risk of clogging by distributing the cooling function across two independent systems rather than one complex integrated system.
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 provides efficient cooling of all roll parts, reduces maintenance time and costs, and allows for rapid replacement of worn components without damaging the inner shaft, enhancing the durability and efficiency of the guiding system.
Implementation Method 1
cooling channels are provided in each roll between said first tubular element and said second tubular element for the passage of a coolant liquid
Implementation Method 2
cooling channels for the passage of a coolant liquid
Data Source
Figure 1~2
Figure 3~4
Figure 5~7
AI summary
A guiding unit for slabs comprising at least two rolls (10, 10') connected to each other and adapted to rotate along a same axis X; wherein each roll comprises a first tubular element (12) and a second tubular element (5), which is external and coaxial to axis X and to the first tubular element and removable from said first tubular element; wherein cooling channels (3, 30) are provided in each roll between said first tubular element and said second tubular element for the passage of a coolant liquid; wherein each roll comprises a respective hub at its two ends; and wherein each hub is provided with cavities communicating with the cooling channels of the respective roll so as to define a path for the coolant liquid from a first end to a second end of the guiding unit crossing said at least two rolls.