Pipe Coupling Retaining Ring with Inclined Flange
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Solution Overview
Problem
Existing pipe coupling devices fail to effectively prevent deformation and breakage of retaining rings and pressing plates when used with flexible plastic pipes under tensile forces, while ensuring sufficient tensile strength and pipe holding power.
Innovation Solution
A pipe coupling device featuring a C-shaped retaining ring with radially protruding flange parts and a pressing plate with recessed parts, where the flange parts are inclined and narrow in the circumferential direction but long in the axial direction, allowing for secure fastening and reduced diameter reduction, enhancing tensile strength and preventing deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional retaining ring with a plate-like flange part is used, then the device can be simple in structure, but the retaining ring and pressing plate deform and break under tensile forces from flexible plastic pipes
Solution Approach 1:
The flange part is designed with non-uniform thickness, being thicker at the rear end (near the joint body) and thinner at the front end. This local quality variation allows the rear end to withstand high tensile forces while the front end allows controlled movement, preventing deformation and breakage of the entire retaining ring structure
Solution Approach 2:
The flange part has an asymmetric geometry with different thicknesses at different positions along its length. The rear end portion has greater thickness than the front end portion, creating an asymmetric structure that optimizes both strength at the connection point and flexibility at the pressing plate interface
2Strength
If the flange part is made wider in the circumferential direction, then fastening area increases, but the pressing plate and retaining ring experience greater deformation under load
Solution Approach 1:
The flange part employs local quality variation through non-uniform thickness distribution. The thicker rear end provides sufficient fastening strength and structural support, while the thinner front end reduces the moment of inertia to allow controlled movement, thereby preventing excessive deformation of the pressing plate and retaining ring
3Strength
If the flange part is made longer in the axial direction, then tensile strength improves, but the device complexity increases
Solution Approach 1:
Rather than uniformly increasing the flange length, the invention applies local quality variation by concentrating material thickness at the rear end. This allows the flange to achieve sufficient tensile strength through strategic material placement rather than simply extending its length, maintaining structural simplicity while improving strength
Solution Approach 2:
The invention changes the thickness parameter of the flange part along its axial length, creating a gradient structure. This parameter variation optimizes the balance between tensile strength and structural simplicity, avoiding the need for complex multi-component designs
Data Source
AI summary
A pipe coupling device includes a joint body, a C-shaped retaining ring that includes a flange part radially protruding from an outer peripheral surface of the retaining ring, a pressing plate that includes a recessed part configured to house the flange part, and includes a front wall configured to face a rear end of the flange part. The joint body, the retaining ring, and the pressing plate are coupled together in an axial direction. The flange part has a substantially rectangular shape extending along the axial direction, and an inclined surface is formed on at least one of the rear end and the front wall. An inner end of the inclined surface is positioned closer to the joint body than an outer end thereof. The inner end is closer to a center axis of the joint body than the outer end. A gap is formed between the rear end and the front wall.