Degradable Welding Spacer for Pipe Gap Control
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Solution Overview
Problem
Existing welding spacers used in pipe welding do not effectively maintain a controlled gap for accommodating thermal expansion and contraction, as they degrade post-installation, leading to inefficiencies in the welding process.
Innovation Solution
A self-retaining welding spacer with a deformable peripheral edge and a liquid- or heat-degradable composition that maintains a consistent gap between pipe segments during welding, featuring a spacer body with a pipe-engaging face and a socket-engaging face, and deformable members to secure it in place, allowing for easy removal post-welding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional welding spacer is used, then the gap spacing is established during welding, but the spacer degrades post-installation requiring manual removal
Solution Approach 1:
The spacer material undergoes parameter changes through liquid degradation or heat degradation, transforming from a solid structural component into a removable residue that can be easily flushed or vaporized away, eliminating manual removal time
Solution Approach 2:
The spacer is designed as a temporary, disposable component made from degradable materials that serve their purpose during welding and then naturally degrade or dissolve, eliminating the need for retrieval and reducing overall process time
2Ease of operation
If the spacer material is made degradable, then easy removal is achieved, but the spacer may lose structural integrity before welding
Solution Approach 1:
The spacer exhibits dynamic properties where its material characteristics change over time - maintaining solid structural integrity during the welding process, then transitioning to a degradable state for easy removal, optimizing both strength and ease of operation at different stages
Solution Approach 2:
The spacer material is pre-engineered with degradable properties that are activated under specific conditions (liquid exposure or heat), providing a built-in mechanism for easy removal that does not compromise initial structural strength
3Reliability
If the gap spacing is not precisely controlled, then thermal expansion accommodation is insufficient, but using a rigid spacer may cause welding defects
Solution Approach 1:
The spacer material properties are optimized to maintain dimensional stability and precise gap control during welding, while allowing for controlled degradation afterward, achieving both precision and reliability
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 spacer ensures consistent gap maintenance during thermal expansion and contraction, facilitating efficient welding while allowing for easy removal after the process, thereby enhancing the reliability and efficiency of pipe welding operations.
Implementation Method 1
One or more deformable members may be provided on the peripheral edge for retaining the spacer in a structure
Implementation Method 2
The spacer may be formed from any suitable material, including a liquid-degradable or heat-degradable composition
Implementation Method 3
The spacer may be formed from any suitable material, including a liquid-degradable or heat-degradable composition
Data Source
AI summary
A welding spacer includes a spacer body having a first pipe-engaging face and a second socket-engaging face. The spacer may be formed from any suitable material, including a liquid-degradable or heat-degradable composition. A spacer thickness separates the first face and the second face. The spacer thickness may comprise solid material or it may have one or more hollow portions. A peripheral edge is provided on the spacer body. One or more deformable members may be provided on the peripheral edge for retaining the spacer in a structure. The welding spacer may be incorporated in a pipe assembly that includes a first pipe segment and a second pipe segment. The first pipe segment has a socket at a first pipe end with an interior shoulder to seat the welding spacer. The second pipe segment has a second pipe end that is received in the socket and seated against the welding spacer.