Pipe Sealing Ring Structure for Groove-Free Thin Pipe Sealing
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Solution Overview
Problem
Conventional gaskets struggle to provide effective sealing on thin pipes due to the difficulty in forming grooves, which limits their application and leads to variations in sealing performance caused by manufacturing size variations.
Innovation Solution
A sealing device featuring a reinforcing ring with a tubular portion and a flange, combined with an elastic body having a seal lip and secondary lip, allowing for improved positioning and attachment to components without the need for a groove, utilizing a cylindrical shape and annular projections to enhance attachability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional gasket is used that requires forming a groove in the pipe, then the gasket can be securely positioned and sealed, but it cannot be applied to thin pipes where groove formation is difficult or impossible
Solution Approach 1:
The invention extracts and eliminates the groove requirement from the sealing system. The gasket is designed to function without being embedded in a groove, with the groove structure removed from the pipe while the gasket itself retains its sealing capability through its own structural features like the radially protruding sealing portion and axially protruding stopper portion.
Solution Approach 2:
Instead of requiring the pipe to provide a groove structure to hold the gasket, the invention inverts the approach by designing the gasket to self-position and self-hold through its own protruding structures. The gasket actively creates its own positioning features rather than relying on passive groove structures in the pipe.
2Weight of moving object
If the component to which the gasket is applied is made thinner or made of resin, then the size and weight are reduced, but the size of the annular space decreases and manufacturing variation increases, compromising sealing performance
Solution Approach 1:
The invention changes the geometric parameters of the gasket, specifically designing the sealing portion to protrude radially and the stopper portion to protrude axially. These parameter changes allow the gasket to compensate for variations in annular space dimensions caused by manufacturing tolerances in thin-walled or resin components.
Solution Approach 2:
The gasket incorporates elastic material that can dynamically adapt to variations in the annular space size. The elastic body deforms to accommodate manufacturing variations while maintaining sealing contact, providing a dynamic solution to static dimensional variations.
3Volume of moving object
If the gasket cross section is made smaller to match downsized components, then the gasket fits better in smaller spaces, but the sealing reliability decreases due to increased relative manufacturing variation
Solution Approach 1:
The gasket uses composite construction with a reinforcing ring providing structural integrity and an elastic body providing sealing functionality. This composite structure allows the gasket to maintain adequate sealing material volume while fitting in smaller spaces, as the reinforcing ring provides the necessary rigidity without increasing the sealing cross-section size.
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 sealing device achieves improved attachability and stability on thin pipes by positioning itself radially and axially, maintaining sealing performance despite size variations and internal pressure, without requiring a groove on the pipe.
Implementation Method 1
an elastic body part that is formed from an elastic body attached to the reinforcing ring
Implementation Method 2
positioned on a pipe by contacting an outer peripheral surface of the pipe
Data Source
AI summary
A sealing device includes a reinforcing ring formed annularly around an axis and an elastic body part that is formed from an elastic body attached to the reinforcing ring and that is formed annularly around the axis. The reinforcing ring includes a tubular portion having a cylindrical shape around the axis and a flange projecting annularly from an outer end portion of the tubular portion to an inner periphery side. The elastic body part includes a lip portion that is an annular portion covering the flange from an outer side, projecting from the flange toward the outer side in a direction of the axis, and projecting toward the inner periphery side in a radial direction. The lip portion includes a seal lip portion that is an annular portion projecting toward the outer side in the direction of the axis and a secondary lip portion that is an annular portion projecting toward an inner side in the direction of the axis.