Vaulted Cover for Strand Sintering Equipment
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Solution Overview
Problem
The existing covers for the equalizing zone in strand sintering equipment are heavy due to the need for a stiff steel frame to withstand flexural tensile stresses, which compromises the structural integrity and weight efficiency of the refractory lining.
Innovation Solution
A vaulted roof structure with an arched metal frame and refractory lining, incorporating coolant channels to reduce tensile stresses and enhance compression resistance, allowing for a lighter and more durable cover design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a flat roof structure with refractory lining is used, then the cover can withstand high temperatures, but the steel frame becomes extremely heavy to resist flexural tensile stresses
Solution Approach 1:
The patent applies a vaulted (curved) roof structure instead of a flat roof. The vaulted shape transforms the stress distribution from flexural tensile stresses in a flat structure to primarily compressive stresses in the curved vault, which the refractory lining can withstand better. This curvature eliminates the need for an extremely stiff and heavy steel frame while maintaining high-temperature resistance.
2Strength
If a stiff steel frame is used to support the refractory lining, then the cover can resist flexural tensile stresses, but the overall weight of the cover increases significantly
Solution Approach 1:
The vaulted shape of the roof structure changes the stress distribution from bending (flexural) stresses to compressive stresses. The arched form naturally redirects loads along the curve to the supports, eliminating the need for a heavy stiffening frame while maintaining structural strength.
Solution Approach 2:
The patent changes the geometric parameters of the roof from flat to vaulted, which fundamentally alters the stress state from tensile to compressive. This parameter change allows the use of lighter materials and reduces the required frame stiffness, thereby reducing overall weight.
3Device complexity
If a planar refractory lining is used, then the cover structure is simple, but tensile stresses reduce the strength and durability of the lining
Solution Approach 1:
The vaulted roof structure transforms the stress state in the refractory lining from tensile to compressive. Since refractory materials are typically stronger in compression than in tension, this geometric change significantly improves the durability and strength of the lining without complicating the overall structure.
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 vaulted design minimizes tensile stresses, primarily inducing compression stresses, resulting in a lighter cover with improved refractory lining strength and durability, while maintaining high-temperature resistance.
Implementation Method 1
the metal frame includes a set of coolant channels for cooling the cover with a cooling intermediate agent conducted through the set of coolant channels
Implementation Method 2
the roof is a vaulted part in the area of which the metal frame and the refractory lining are arched like a vault... mainly compression stresses occur in the vault
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A cover (1) for strand sintering equipment (3) provided with a continuous strand sintering track (2). The cover (1) includes a vaulted part (4) that extends on top of the strand sintering track (2).