Swaging Ring Pipe Joint Structure for Stable Coupling Force
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Solution Overview
Problem
The existing pipe connection apparatus using swaging methods faces challenges in maintaining or increasing coupling force between the swaging ring and the outer body, especially after assembly and swaging completion, due to reduced frictional force and stress distribution.
Innovation Solution
The apparatus includes a swaging ring with specific tapered portions and an inner groove portion that engages with the outer body's rear outer protruding portion to restrict rearward movement and maintain contact stress, preventing separation and enhancing coupling force by eliminating contact between the second tapered portion and the outer body during assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the swaging ring and outer body are completely assembled with inclined surfaces in contact, then the coupling force is initially sufficient, but stress concentration and frictional force decrease after assembly, reducing coupling force
Solution Approach 1:
The patent extracts the harmful inclined contact surfaces between the swaging ring and outer body, replacing them with a vertical cylindrical contact surface. This removes the source of stress concentration and frictional force degradation, allowing the coupling force to be maintained reliably after assembly without the detrimental effects of inclined surface contact.
Solution Approach 2:
The patent changes the geometric parameters of the contact surface from an inclined angle to a vertical cylindrical shape. This parameter change transforms the contact mechanics, eliminating stress concentration and maintaining consistent frictional force, thereby ensuring reliable coupling force maintenance throughout the service life of the connection.
2Ease of manufacture
If the second tapered portion of the swaging ring contacts the outer body during assembly, then assembly is simplified, but separation forces occur after swaging completion, reducing coupling force
Solution Approach 1:
The patent removes the second tapered portion from the swaging ring structure, eliminating the source of separation forces that occur after swaging completion. This extraction prevents the contact between the tapered portion and outer body, thereby maintaining coupling force without compromising assembly simplicity, as the vertical cylindrical surface provides adequate guidance.
3Device complexity
If conventional swaging structure is used, then the structure is simple, but contact between inclined surfaces causes stress concentration and frictional force decrease
Solution Approach 1:
The patent modifies the contact surface geometry from an inclined configuration to a vertical cylindrical shape. This parameter change eliminates stress concentration while maintaining relatively simple device structure. The vertical cylindrical surface distributes stress uniformly, preventing the stress concentration problems associated with inclined surfaces without significantly increasing structural complexity.
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
This configuration increases the coupling force between the swaging ring and the outer body, preventing separation and ensuring strong fixation, while reducing the force required for assembly and swaging, and minimizing the risk of separation forces post-swaging.
Implementation Method 1
an inner groove portion configured to connect the first tapered portion and the second ring portion and recessed outward further than a front end of the first tapered portion and a rear end of the second ring portion
Implementation Method 2
a swaging ring configured to come into contact with and press at least a part of the pipe mount part while surrounding at least a part of the pipe mount part
Implementation Method 3
maintain contact stress, preventing separation and enhancing coupling force
Implementation Method 4
stress of an elastic region, which remains after plastic deformation, is applied to an inclined surface of a swaging ring
Data Source
AI summary
A pipe connection apparatus may include an outer body having a pipe mount part having a pipe insertion space opened rearward so that a pipe end is inserted into the pipe insertion space, and a swaging ring configured to come into contact with and press at least a part of the pipe mount part while surrounding at least a part of the pipe mount part.