Gasless Pipeline Welding With Arc Voltage Control in Wind
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Solution Overview
Problem
Conventional gas-shielded welding techniques for large structures like pipelines require bulky enclosures that increase costs, environmental impact, and logistical challenges due to the need for large, heavy equipment and extensive excavation, especially in open spaces and tight terrains.
Innovation Solution
A gasless, mechanized welding system that eliminates the need for auxiliary inert gas supplies by using precise local voltage measurement, low-inductance power transmission, and a mechanized carrier with a guide track to perform field welding without enclosures, reducing equipment size, weight, and labor while allowing for portable and efficient pipeline construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If gas-shielded welding techniques are used to achieve desired weld quality, then weld quality is improved, but equipment size and weight increase due to required enclosures
Solution Approach 1:
The patent extracts and eliminates the enclosure component from the welding system by transitioning to gasless welding technology. This removes the need for large protective structures while maintaining weld quality through alternative protection methods inherent to the gasless welding process itself.
Solution Approach 2:
The patent changes the fundamental parameter of welding protection from gas-shielded to gasless methodology. This parameter change fundamentally alters the system requirements, eliminating the need for enclosures and associated heavy equipment while preserving weld integrity through the gasless welding process characteristics.
2Manufacturing precision
If large enclosures are used to shield pipeline joints from wind, then weld quality is improved, but device complexity increases
Solution Approach 1:
The patent removes the complex enclosure system from the welding setup by adopting gasless welding. This extraction eliminates the need for wind shielding structures, simplifying the overall system while maintaining weld quality through the intrinsic properties of gasless welding technology.
3Productivity
If enclosures and heavy equipment are transported to field sites, then welding capability is improved, but loss of time increases due to transportation and excavation
Solution Approach 1:
The patent extracts and eliminates the time-consuming enclosure setup and excavation requirements by implementing gasless welding. This allows welding operations to proceed directly at field sites without the preliminary time investment required for enclosure construction and heavy equipment deployment.
Solution Approach 2:
The gasless welding system is designed to be portable and ready for immediate deployment, eliminating the need for preliminary enclosure construction and site preparation. The system can be quickly transported and installed, performing the protective function inherently without requiring advance setup of large structures.
4Area of stationary object
If gasless welding is used to eliminate enclosures, then equipment size is reduced, but measurement precision requirements increase for voltage control
Solution Approach 1:
The patent replaces mechanical/volumetric protection (enclosures) with an electrical/control-based system (precise voltage measurement and control). This substitution enables compact equipment design while achieving the necessary weld protection through sophisticated electrical parameter management rather than physical barriers.
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 system minimizes the footprint, weight, and environmental impact of welding equipment, enabling efficient and cost-effective pipeline construction by eliminating the need for large enclosures and heavy transportation, while maintaining weld quality and reducing human intervention.
Implementation Method 1
Most types of welding involve melting a portion of the pieces to be joined near an interface between those pieces
Implementation Method 2
The melted material runs together and re-hardens as it cools, so that the two pieces become an essentially unitary structure
Data Source
AI summary
A system and method provide gasless, mechanized, field welding of an exterior of a tubular structure such as a pipeline, without the need for an enclosure. An embodiment consolidates some of the welding equipment on a skid for ease of transport to and from a remote worksite. The gasless weld may be achieved despite the presence of wind, by precisely controlling an arc voltage as disclosed. The footprint and weight of the system may be minimized, along with the associated labor, expense, and environmental impact otherwise incurred by conventional welding techniques using enclosures.