Mobile Convection Welding for Pressure Vessel Preheating and Cooling
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Solution Overview
Problem
The manufacturing of pressure vessels is hindered by resource-intensive welding processes, including excessive time and energy consumption due to the need for preheating and cooling, which limits productivity and increases costs when welds fail inspection.
Innovation Solution
A temporary, mobile convection apparatus that pre-heats and maintains substrate materials for welding, utilizing a manifold system with internal convection sections and thermal barriers to reduce resource requirements and enhance temperature control, allowing for efficient pre-heating and rapid cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If traditional welding preheating methods are used, then substrate materials reach desired temperatures for welding, but excessive time and energy are consumed
Solution Approach 1:
The heating system is divided into multiple independent heating zones along the welding path, each controlled by separate heaters and thermocouples. This segmentation allows localized heating only where needed, reducing overall energy consumption while achieving required substrate temperatures at weld joints.
Solution Approach 2:
The system performs preliminary heating of substrate materials to optimal temperatures before welding begins. By pre-heating the substrate in controlled zones, the actual welding process requires less energy and time, reducing total energy consumption while ensuring proper welding conditions are met in advance.
2Temperature
If traditional welding preheating methods are used, then substrate materials reach desired temperatures for welding, but excessive time is consumed
Solution Approach 1:
Thermocouples are positioned to monitor substrate temperature in real-time and provide feedback to the control system. This feedback mechanism allows the system to adjust heater power dynamically, achieving target temperatures faster and maintaining them precisely, thereby reducing total heating time while ensuring welding quality.
Solution Approach 2:
The system dynamically adjusts heating parameters including temperature setpoints, heater power levels, and heating zone configurations based on real-time substrate temperature measurements. This parameter optimization enables faster heating rates while maintaining temperature control, reducing overall heating time without compromising weld quality.
3Reliability
If welds undergo quality inspections and fail, then welds are removed and replaced with patches, but resources are wasted and costs increase
Solution Approach 1:
The system performs preliminary heating and temperature maintenance of substrate materials to optimal ranges before welding begins. This pre-preparation ensures that the welding process proceeds under ideal conditions, reducing the likelihood of weld defects and subsequent rework, thereby minimizing material waste from failed welds.
Solution Approach 2:
Real-time temperature monitoring and control provide feedback that ensures substrate materials are at the correct temperature throughout the welding process. This precise control prevents common welding defects caused by improper substrate temperature, improving weld quality and reducing the need for costly rework and material replacement.
4Temperature
If traditional cooling methods are used after heating, then substrate materials cool down for further manipulation, but excessive time is lost
Solution Approach 1:
The cooling system dynamically adjusts cooling rates based on real-time substrate temperature measurements and operational requirements. By controlling the cooling process dynamically rather than using fixed-rate cooling, the system achieves optimal cooling speeds that reduce waiting time while maintaining substrate integrity and preventing thermal shock, enabling faster transition to subsequent manufacturing steps.
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 solution significantly reduces the time and resources needed for welding processes, achieving desired temperatures with a 50% reduction in power usage and a 75% decrease in cooling time compared to traditional methods, thereby improving efficiency and reducing costs.
Implementation Method 1
convection occurs internal to a space created by the convection apparatus
Implementation Method 2
A temporary, mobile convection apparatus that pre-heats and maintains substrate materials for welding, utilizing a manifold system with internal convection sections
Implementation Method 3
manifold system with internal convection sections and thermal barriers
Implementation Method 4
convection occurs internal to a space created by the convection apparatus
Data Source
AI summary
Disclosed is a temporary and mobile apparatus and methods for manufacturing welded products, including pressure vessels, wherein heating and/or cooling is to be applied to substrate material of the weld site. Certain embodiments include panels arranged to form a convection section that allows for improved heating and cooling of substrates and provide improved welding processes. Embodiments can include a manifold along used for heating and cooling. Apparatuses and methods of using making those apparatuses for improved welding are described herein.