Spring-Bar Pipe Coupon Extraction for Leak-Free Pressurized Removal
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Solution Overview
Problem
Existing pipe coupon extraction tools face difficulties in removing pipe coupons from pressurized pipes without causing leakage, especially when the pipe is buried or part of a permanent fluid distribution system.
Innovation Solution
A pipe coupon extraction tool comprising a rod and a spring bar secured to the rod, with the spring bar's surface angled to engage with the pipe coupon, allowing for secure extraction without flexing, and a handle for user grip, facilitating the removal of the pipe coupon without leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a pipe coupon is cut from a pressurized pipe using a special tool, then the pipe coupon can be separated from the pipe, but the pipe coupon cannot be removed without causing fluid leakage
Solution Approach 1:
The tool is divided into distinct functional segments: a rod for insertion, a spring bar for engagement and extraction, and an insertion valve assembly for sealing. This segmentation allows each component to perform its specific function independently, enabling coupon removal while maintaining system sealing integrity.
Solution Approach 2:
The spring bar acts as an intermediary element between the rod and the pipe coupon. It engages with the coupon through the bore, provides the necessary mechanical force for extraction, and then disengages cleanly, preventing fluid leakage during the entire removal process.
2Adaptability or versatility
If existing extraction tools are used on buried or permanent fluid distribution systems, then pipe coupons can be accessed, but removal becomes difficult or impossible without causing leakage
Solution Approach 1:
The tool is designed with universal applicability to work in multiple conditions including buried pipes and permanent fluid distribution systems. The insertion valve assembly can seal against various pipe configurations, and the spring bar mechanism adapts to different coupon positions, enabling removal in previously inaccessible scenarios.
Solution Approach 2:
The tool approaches the pipe coupon through the bore dimension rather than attempting external access. By inserting the rod and spring bar through the bore created by the cutting tool, the system overcomes the limitations of buried or permanently installed pipes where external manipulation would be difficult or impossible.
3Manufacturing precision
If the spring bar surface is angled with respect to the central axis, then engagement with the pipe coupon inner surface is improved, but the spring bar may flex during insertion
Solution Approach 1:
The spring bar features localized quality variations: the surface is angled at specific regions to optimize engagement with the pipe coupon inner surface, while other portions maintain sufficient rigidity to prevent excessive flexing during insertion. This localized differentiation allows the spring bar to simultaneously achieve precise engagement and structural stability.
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
Enables the safe and efficient removal of pipe coupons from pressurized systems by engaging the spring bar with the pipe coupon's inner surface, preventing leakage and allowing for easy extraction, even in challenging conditions.
Implementation Method 1
engaging a portion of the spring bar with an inner surface of the pipe coupon
Implementation Method 2
the spring bar configured to stop against and not pass through the bore of the pipe coupon
Data Source
AI summary
A pipe coupon extraction tool includes a rod defining a first end, a second end, and a central axis; and a spring bar defining a first end and a second end, the spring bar rotatably secured to the rod, a surface of the spring bar configured to be angled with respect to the central axis when the pipe coupon extraction tool is engaged with a pipe coupon.