Polymeric End Cap Clamping for Reliable Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional end cap sealing systems face challenges in achieving uniform compression of gaskets or o-rings for effective sealing and are often heavy and costly due to metallic materials, making them inefficient and expensive for use in check valve assemblies.
Innovation Solution
A polymeric end cap core with a circumferential groove for an o-ring and a circular clamp with a channel to capture the rim of the end cap, allowing the o-ring to engage the interior surface of the piping end, reducing material costs and weight while ensuring reliable sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metallic end caps are used with uniform compression sealing, then sealing reliability is improved, but weight and manufacturing cost increase
Solution Approach 1:
The end cap is segmented into two parts: a lightweight polymeric end cap core that fits inside the piping end, and a separate metallic clamp that attaches to the exterior flange. This segmentation allows each component to be optimized for its specific function while reducing overall weight compared to a solid metallic end cap.
Solution Approach 2:
The sealing system uses composite materials by combining polymeric material for the end cap core with metallic material for the clamp. The polymeric core provides lightweight sealing engagement with the piping interior, while the metallic clamp provides structural attachment strength to the flange, achieving both weight reduction and reliable sealing.
2Strength
If metallic end caps are used, then strength and durability are improved, but manufacturing cost increases
Solution Approach 1:
The end cap is segmented into a polymeric core and a metallic clamp. The polymeric core can be manufactured using cost-effective injection molding processes, while the clamp uses less expensive metallic material and simpler forming processes, reducing overall manufacturing cost compared to a solid metallic end cap.
Solution Approach 2:
The polymeric end cap core is designed as a disposable or replaceable component that can be manufactured at low cost. If sealing issues arise, only the inexpensive polymeric core needs to be replaced rather than replacing an entire metallic end cap assembly.
3Reliability
If uniform compression is applied to the gasket, then sealing effectiveness is improved, but difficulty in achieving uniform compression increases
Solution Approach 1:
Instead of applying compression from the exterior flange directly to the gasket (which causes non-uniform compression), the sealing approach is inverted: the polymeric end cap core engages the piping interior surface to provide the primary sealing action, while the gasket and clamp provide secondary sealing and structural attachment. This inversion allows the softer polymeric material to conform to the piping interior, ensuring uniform sealing contact.
Solution Approach 2:
The sealing mechanism changes the compression parameter distribution by using the compliant polymeric end cap core to distribute sealing pressure uniformly against the piping interior surface. The metallic clamp applies external compression that is distributed through the gasket, but the primary sealing action comes from the polymeric core's ability to conform and distribute pressure evenly.
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 lightweight, cost-effective sealing system with improved sealing reliability by using a polymeric end cap core and a clamp mechanism, reducing manufacturing costs and weight while ensuring effective sealing in check valve assemblies.
Implementation Method 1
An o-ring is positioned within the groove for sealingly engaging an interior wall of the open piping end
Implementation Method 2
a generally circular clamp having a channel formed therein for capturing the rim and a flange formed on the check valve
Data Source
AI summary
The present invention provides an end cap sealing system for sealing an open piping end. The end cap sealing system includes an end cap having an end cap core. The end cap core has a generally cylindrical end with a circumferential groove formed around the exterior thereof and a closed end that defines a generally circular rim. An o-ring is positioned within the groove for sealingly engaging an interior wall of the piping open end. The end cap sealing system also includes a generally circular clamp having a channel formed therein for capturing the rim and a flange formed on the check valve. The o-ring being spaced-apart from the rim of the end cap core.