Double-Locking Quick Connector for High-Temperature Leak Prevention
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Solution Overview
Problem
Existing quick connectors for fluid lines face issues with unreliable locking and potential leakage due to elasticity loss in plastic materials at high temperatures, and lack a reliable indication of proper insertion.
Innovation Solution
A double-checked locking mechanism is introduced, comprising a first locking mechanism with retaining arms and an elastic reset component, and a second locking mechanism that prevents the first from unlocking, ensuring stable connection and providing visual indication of proper insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single locking mechanism using elastic connection strip is used, then the structure is simple, but the locking reliability deteriorates at high temperature due to elasticity loss
Solution Approach 1:
The locking mechanism is divided into two independent parts: a first locking mechanism (retaining ring with elastic connection strip) and a second locking mechanism (locking collar with locking arms). Each mechanism independently provides locking function, so that if one fails due to elasticity loss at high temperature, the other can still maintain the locked state, thereby resolving the contradiction between structural simplicity and locking reliability.
Solution Approach 2:
The second locking mechanism serves as a pre-prepared backup that prevents the plug-in tube from detaching if the first locking mechanism fails. The locking arms of the second mechanism are positioned to engage with the plug-in tube before any potential failure occurs, providing a safety cushion against high-temperature elasticity loss.
2Reliability
If a double-checked locking structure is added, then the locking reliability is improved, but the device complexity increases
Solution Approach 1:
The first locking mechanism (retaining ring) and second locking mechanism (locking collar) are merged into a single integrated assembly that operates together. The locking arms of the second mechanism work in conjunction with the retaining ring of the first mechanism, providing double-checked locking without requiring completely separate systems, thus limiting the increase in device complexity.
Solution Approach 2:
The second locking collar serves multiple functions: it provides the second locking action through its locking arms, and simultaneously acts as a protective cover for the first locking mechanism. This multi-functionality reduces the need for additional separate components, thereby controlling device complexity while maintaining improved reliability.
3Reliability
If locking mechanism components are increased, then the anti-leakage performance is improved, but the manufacturing complexity increases
Solution Approach 1:
The locking mechanism is segmented into two functionally independent but structurally integrated parts: the retaining ring with elastic strip and the locking collar with locking arms. This segmentation allows each component to be manufactured separately using standard processes, then assembled together, which limits the increase in manufacturing complexity while achieving improved anti-leakage performance through the dual-locking action.
4Measurement precision
If a visual indication function is added, then the insertion accuracy is improved, but the device complexity increases
Solution Approach 1:
The locking collar incorporates a visual indication feature where the degree of rotation of the locking arms relative to the collar body indicates the insertion status. When the locking arms are in the locked position, they align with specific markings or create a visible gap pattern that provides immediate visual confirmation of proper insertion, improving insertion accuracy without adding complex electronic or mechanical indication systems.
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 mechanism ensures reliable locking and prevents leakage by maintaining connection even if the first locking mechanism fails, with visual confirmation of proper insertion, enhancing stability and reliability across temperature variations.
Implementation Method 1
having an elastic reset component for retaining the first locking mechanism in a locked position
Data Source
AI summary
A quick connection device with a double-checked locking mechanism includes a connection housing and a locking mechanism, the locking mechanism including a first locking mechanism inserted into the connection housing and having a pedestal from which a pair of retaining arms extends, the pair of retaining arms being connected by a connection strip to form a retaining ring for fitting with an opposite plug-in tube, and having an elastic reset component; and a second locking mechanism inserted into the connection housing having a base from which locking arms and holding arms extend, the first locking mechanism being inserted between the locking arms and the holding arms, wherein the locking arms support a portion of the first locking mechanism and the second locking mechanism prevents movement of the first locking mechanism from the locked position to an unlocked position when the second locking mechanism is in a locked position.