Refractory Casting Nozzle Centering for Wobble-Free Changes
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Solution Overview
Problem
Existing refractory casting nozzles experience wobbling or wiggling during the changing process, affecting the precise coaxial alignment and control precision in metallurgical operations.
Innovation Solution
The casting nozzle is designed with centering elements protruding on one side and bevellings on the other, angled to guide and center the nozzles during the changing process, ensuring tight contact and preventing wobbling or wiggling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If casting nozzles are pushed in and out during the changing process, then nozzle replacement is enabled, but wobbling or wiggling occurs causing misalignment
Solution Approach 1:
The patent introduces intermediary centering elements and bevellings as mediating structures between the casting nozzles and the changing device. These elements act as a mechanical interface that guides the nozzle movement, ensuring precise coaxial alignment during the replacement process while enabling easy push-in and push-out operations.
Solution Approach 2:
The patent modifies the geometric parameters of the nozzle structure by adding centering elements with specific dimensions and bevellings at defined angles. These parameter changes create a self-centering mechanism that maintains precise alignment during the changing process, transforming the simple push-in/out motion into a controlled, aligned movement.
2Ease of operation
If simple mechanical drive is used for changing nozzles, then operation is simplified, but wobbling or wiggling occurs
Solution Approach 1:
The centering elements and bevellings are designed to automatically perform the centering and alignment functions during the changing process. As the nozzle is pushed in or out by the simple mechanical drive, the centering elements engage with the bevellings to self-center the nozzle, eliminating the need for complex alignment mechanisms while maintaining high reliability.
3Manufacturing precision
If centering elements and bevellings are added to the nozzle design, then alignment precision is improved, but device complexity increases
Solution Approach 1:
The patent segments the nozzle structure by separating the centering function from the main nozzle body. The centering elements are distinct features added to the top side plate, while the bevellings are separate geometric features on the abutting surfaces. This segmentation allows each element to perform its specific function independently, achieving high alignment precision without significantly complicating the overall nozzle design.
Data Source
AI summary
Refractory casting nozzle for a changing device arranged at the outlet of a metallurgical vessel is provided with a top side refractory plate, which is provided with an abutting surface at each of two opposing end faces. During a change, the casting nozzle can either be moved against the one abutting surface of a top side plate of an adjacent casting nozzle or be pushed out from this casting nozzle. This top side plate is provided, in the one abutting surface, with a centering element protruding on both sides of this and in the opposite abutting surface with a bevelling on both sides, designed such that, during a change, the casting nozzle cooperates, with its centering elements with the bevellings of the adjacent identically designed casting nozzle, thus bringing about a guiding of the two casting nozzles.