Pipe Junction Repair Using Mechanical Anchor and Compression Gasket
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Solution Overview
Problem
Current pipe junction repair methods, such as brim-style junction liners, face issues with inadequate sealing and attachment to the junction, leading to potential flow disruptions and seal breaches due to polymerization shrinkage and lack of structural integrity in the brim portion.
Innovation Solution
A method and assembly that utilize a pipe liner with a tubular and brim portion, secured by a mechanical anchor that travels through the pipe liner and the structure, along with a compression gasket to create a compression seal and prevent leakage, ensuring a fluid-tight seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a brim-style junction liner is used relying on adhesive bond, then the lateral portion structural integrity is maintained, but the brim portion may detach and breach the seal
Solution Approach 1:
The junction liner is divided into two distinct portions: a tubular portion for the lateral pipe and a brim portion for the main pipe. Each portion is optimized independently - the tubular portion relies on adhesive bonding while the brim portion uses mechanical anchoring through compression gaskets, allowing each segment to address its specific functional requirements.
Solution Approach 2:
A compression gasket is introduced as an intermediary component between the brim portion and the main pipe wall. This gasket provides mechanical anchoring and sealing functionality, mediating the connection between the liner and the host pipe structure, thereby preventing brim portion detachment while maintaining seal integrity.
2Strength
If a tubular pipe liner covers full circumference of main pipe, then structural properties around junction are enhanced, but flow disruption occurs within main pipe
Solution Approach 1:
The liner configuration is segmented such that only the brim portion extends into the main pipe circumference, rather than a full tubular liner. This limited segmentation provides necessary structural reinforcement at the junction while leaving the majority of the main pipe cross-section open for uninterrupted flow.
Solution Approach 2:
The reinforcement is applied locally only where needed - the brim portion at the junction area - rather than covering the entire main pipe circumference. This localized quality enhancement provides structural support at the critical junction while maintaining optimal flow conditions in the main pipe body.
3Reliability
If cured-in-place pipe liner is used, then sealing is created at junction, but polymerization shrinkage increases risk of seal breach
Solution Approach 1:
The compression gasket is installed beforehand to provide mechanical support and cushioning to the brim portion during the polymerization process. This pre-positioned mechanical anchor compensates for the polymerization shrinkage forces, preventing seal breach before the adhesive fully cures.
Solution Approach 2:
The sealing system combines multiple materials with complementary properties: the cured-in-place adhesive material provides chemical bonding, while the compression gasket material provides mechanical support and compensation for shrinkage. This composite approach ensures seal integrity despite polymerization volume changes.
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 solution provides a reliable, cost-effective, and durable fluid-tight seal at pipe junctions by mechanically anchoring the brim portion and using compression gaskets to minimize flow disruptions and seal breaches, enhancing the structural integrity and longevity of the repair.
Implementation Method 1
a compression gasket for placement between the pipe liner and the pipe or second structure
Implementation Method 2
a mechanical anchor adapted to secure the brim portion of the pipe liner to the second structure
Data Source
AI summary
An assembly and method of sealing a junction of a pipe and a second structure are provided. The assembly includes a pipe liner having a tubular portion and a brim portion, and a mechanical anchor adapted to secure the brim portion of the pipe liner to the second structure. The assembly may further include a compression gasket for placement between the pipe liner and the pipe or second structure. The compression gasket may comprise a hydrophilic material, a hydrophobic material, or a compressible material. The methods of using the assembly include, but are not limited to, the use of a cured-in-place pipe liner.