High-Pressure Pipe Connector Spring Compression Design
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Solution Overview
Problem
Conventional high-pressure pipe connectors face issues with maintaining a strong contact between hoses and nipples due to creep phenomenon in elastic bands, leading to reduced tightening force over time, and concentration of fastening stress, which can result in weak points and complicated assembly processes.
Innovation Solution
A high-pressure pipe connector design featuring a spring wound around the hose's outer circumference, supported by a main body and compressed by a fastening nut with a threaded part, where the spring's winding direction aligns with the nut's rotational direction, and taper holes are used to maintain the spring's deformation and prevent loosening, ensuring a uniform outer diameter of the nipple for easy insertion and strong contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a band made of elastic material is used to connect the hose to the nipple, then the tightening force is maintained to some extent, but the band itself yields to the internal pressure and gets loose
Solution Approach 1:
The patent changes the physical state of the elastic material by introducing a vulcanizing agent that causes cross-linking reactions, transforming the material from a simple elastic band to a thermosetting rubber composite. This parameter change in the material's chemical structure allows it to maintain tightening force while resisting internal pressure without yielding or loosening.
Solution Approach 2:
The patent creates a composite material system combining elastic material with vulcanizing agents and fillers. This composite structure provides both the elastic properties needed for maintaining tightening force and the structural stability required to resist internal pressure, resolving the contradiction between flexibility and pressure resistance.
2Strength
If several parts of the hose end are fastened using multiple bands, then the connection strength is improved, but the fastening stress concentrates on those fastened parts creating weak points
Solution Approach 1:
The patent segments the fastening function into multiple independent elastic bands wrapped around different portions of the hose end. Each band distributes the fastening stress independently, preventing stress concentration at any single location while collectively providing strong overall connection.
Solution Approach 2:
The patent applies local quality by using multiple bands at different positions around the hose end, creating localized fastening zones that collectively provide uniform stress distribution. Each band provides localized fastening while the combination ensures overall uniformity, eliminating weak points.
3Reliability
If the surface of the nipple is made uneven to prevent hose pull-out, then the resistance to pull-out force is improved, but the assembly work becomes complicated and requires great force for detachment/attachment
Solution Approach 1:
The patent replaces the mechanical interlocking system (uneven nipple surface) with a friction-based elastic fastening system. The elastic bands create friction and normal force against the hose end, providing pull-out resistance without requiring complex nipple surface geometry or high assembly forces.
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 design maintains a strong, consistent contact between the hose and nipple, resisting pull-out forces and maintaining assembly efficiency by suppressing spring restoring forces through frictional forces, preventing deformation, and reducing the number of components.
Implementation Method 1
a spring wound around an outer circumference of an end portion of the hose
Implementation Method 2
a fastening nut surrounding the end portion of the hose together with the main body, and formed with a threaded part to be meshed with a threaded part formed on the main body
Implementation Method 3
suppressing spring restoring forces through frictional forces
Data Source
AI summary
Provided is a pipe connector having high resistance to pullout force and having high durability. The outer diameter of a nipple (20) is substantially uniform when viewed in the lengthwise direction. The end part of a hose (24) is placed over the nipple (20). A spring (32) is wound around the outer circumference of the hose (24) such that no gap occurs between adjacent wires. The shaft part of a connector main body (14) supports the nipple (20). A fastening nut (26) has an internally threaded part (28) which meshes with an externally threaded part (16) provided on the connector main body (14), and encloses the end part of the hose (24) together with the connector main body (14). The spring (32) is compressed by tightening the threaded part of the fastening nut (26). The end part of the tightly wound spring (32) rotates and the outer diameter thereof is reduced, thereby generating high fastening force. Thereafter the fastened state is maintained by frictional force.