Asymmetric 180-Degree Pipe Elbows for Furnace Cooling Panel Welding
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Solution Overview
Problem
Water-cooled panels in industrial furnaces, such as electric arc furnaces, are prone to damage and require frequent replacement, leading to unscheduled downtime and significant maintenance costs due to the difficulty in welding 180-degree returns in confined spaces, resulting in incomplete and compromised welds.
Innovation Solution
A 180-degree pipe elbow design with one end extending beyond the other, allowing for easier welding by providing sufficient space for automatic or semiautomatic welding, and using materials like aluminum bronze to withstand high temperatures and reduce corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional symmetric 180-degree pipe elbows are used in confined spaces, then the piping can be installed, but the welding quality deteriorates due to insufficient workspace
Solution Approach 1:
The patent applies asymmetry by designing the 180-degree pipe elbow with one leg extending beyond the other leg, creating an asymmetric structure. This asymmetric design provides unequal clearance on either side of the elbow, specifically creating sufficient workspace on one side for welding operations while maintaining the compact 180-degree return configuration needed for the cooling panel application.
2Duration of action of stationary object
If water-cooled panels are used instead of brick refractory, then the panels last longer, but they are prone to damage and require frequent replacement
Solution Approach 1:
The patent applies preliminary action by designing the piping system with asymmetric 180-degree elbows that provide adequate welding workspace before assembly. This preliminary design consideration ensures that high-quality welds can be properly fabricated and executed, creating stronger joints that prevent future failures and extend the service life of the cooling panel without increasing susceptibility to damage.
3Ease of repair
If unscheduled repairs are performed on damaged panels, then the panels can be replaced, but production downtime increases significantly
Solution Approach 1:
The asymmetric elbow design with improved welding accessibility allows for better quality welds during manufacturing, which prevents premature failure and reduces the frequency of unscheduled repairs. This preliminary design consideration helps avoid production downtime by creating a more reliable piping system that requires fewer interruptions for maintenance.
4Device complexity
If symmetric 180-degree pipe elbows are used, then the design is simple, but the welding process becomes difficult in confined spaces
Solution Approach 1:
The patent introduces minimal asymmetry into the 180-degree elbow design, where one leg extends slightly beyond the other. This asymmetric modification maintains the overall simplicity of the elbow design and the 180-degree return configuration while creating the necessary workspace for welding operations, thus resolving the contradiction between design simplicity and welding ease.
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
This design enhances manufacturing efficiency, reduces labor costs, and ensures high-quality welds, extending the operational life of water-cooled panels and reducing maintenance needs, thereby minimizing costly downtime.
Implementation Method 1
piping sinuously winding between a first end and a second end... configured to receive a fluid for cooling the furnace
Implementation Method 2
the first leg includes a first leg beveled edge being welded to the first section pipe and wherein the second leg includes a second leg beveled edge being welded to the second section pipe
Data Source
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AI summary
A 180-degree pipe elbow having one end extending beyond the other end and method of joining a 180-degree pipe elbow to lengths of cooling pipe to form a cooling panel for use in a furnace, boiler or other industrial heating apparatus that benefits from assistance of a cooling panel. Having one end of the elbow extend beyond the other end of the elbow enables the one end to be joined to a length of pipe by welding whereby the joining may be by automatic welding which will reduce manufacturing costs and ensure a quality weld.