Push Joint PE Adapter With Restraint Ring for Leak-Resistant Sealing
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Solution Overview
Problem
Existing push joint adapters for polyethylene pipelines require high torque and metal components, leading to potential leaks due to plastic deformation and corrosion, and are cumbersome in irrigation systems where reliable seals and efficient assembly are necessary.
Innovation Solution
A push joint adapter with a soft rubber gasket for controlled displacement and a restraint ring assembly that eliminates the need for metal stiffeners and bolts, allowing for interference fits and easier assembly by integrating with polyethylene piping through fusion, reducing the complexity and cost of connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical joint adapters with metal stiffeners and bolts are used in PE pipelines, then the seal reliability is improved, but the device complexity and corrosion risk increase
Solution Approach 1:
The patent removes metal stiffeners and bolts from the adapter design, extracting the problematic metal components that cause corrosion and complexity. The adapter body is made entirely of PE material that fuses to the pipeline, eliminating the need for separate metal reinforcement elements while maintaining structural integrity through the fusion process itself.
Solution Approach 2:
The adapter is designed as an integrated PE component that fuses directly to the pipeline, merging the adapter function with the pipeline material. This eliminates the interface between dissimilar materials (PE and metal) and creates a unified corrosion-resistant connection system while reducing the number of separate parts.
2Reliability
If high torque is applied to bolted mechanical joint adapters, then the initial seal is improved, but plastic deformation occurs causing preload loss and potential leaks over time
Solution Approach 1:
The patent replaces the bolted mechanical joint system with a fusion-based connection system. Instead of using bolts that require high torque and are subject to plastic deformation and preload loss, the adapter fuses directly to the PE pipeline through thermal fusion, creating a permanent bond that does not rely on bolt preload or mechanical clamping forces.
3Ease of manufacture
If metal components (bolts and nuts) are used in the connection system, then the initial assembly is simplified, but corrosion resistance deteriorates
Solution Approach 1:
The patent uses homogeneous PE material throughout the adapter body, matching the pipeline material. This eliminates the heterogeneity of dissimilar materials (metal fasteners with plastic flanges) and ensures uniform corrosion resistance across the entire connection assembly, as PE is inherently resistant to corrosion from water and soil environments.
4Object-affected harmful factors
If push joint adapters without metal stiffeners are used, then corrosion resistance is improved, but the PE tube may deform under compression stress preventing reliable seal
Solution Approach 1:
The patent replaces the mechanical stiffening approach (metal rings) with a fusion-based structural approach. The adapter body itself, made of PE material, fuses to the pipeline to form a unified structural element that distributes compression forces along the fusion joint rather than concentrating them at a single interface, eliminating the need for metal stiffeners while maintaining seal integrity.
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, leak-resistant, and cost-effective connection method that simplifies the assembly process, reduces the risk of corrosion, and eliminates the need for high-torque bolt tightening, enabling faster installation and longer system lifespan.
Implementation Method 1
The push joint adapter includes an insertion section insertable into a socket of a push joint pipe fitting in an interference fit
Implementation Method 2
The adapters according to the described embodiments are fused to the piping in which it is used
Data Source
AI summary
A push joint adapter is connectable to one or more push joint pipe fittings in a pipeline. The push joint adapter includes an insertion section insertable into a socket of a push joint pipe fitting in an interference fit, a pipeline section connectable with the pipeline, and a collar disposed between the insertion section and the pipeline section. A restraint ring assembly cooperable with the push joint pipe fitting includes a restraint ring secured to the pipeline section and engaging the collar and a restraint rod connected to the restraint ring. The push joint adapter facilitates connecting push joint gasketed bell gate valves and fittings in a pipeline such as a polyethylene pipeline.