Quick Coupling Rotation Constraint for Misconnection Prevention
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Solution Overview
Problem
Existing quick couplings in fluid pipeline systems often suffer from misconnection issues, leading to reduced efficiency in heat exchange processes due to incorrect fluid flow direction, despite the use of labels, which require operator attention and can fail in low-light conditions.
Innovation Solution
A quick coupling set with rotation-restraining structures on the plug and socket ensures correct connection by allowing rotation only in a specific direction, preventing misconnection through structural matching of these structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If labels are pasted on quick couplings for identification, then operators can identify flow direction, but misconnection may still occur if operator neglects labels or environment is insufficiently lit
Solution Approach 1:
The patent applies asymmetry by designing the rotation-restraining structure with a specific geometric configuration that only permits rotation in one direction. The structure includes asymmetric features such as a pawl that engages with ratchet teeth arranged in a unidirectional pattern, allowing the plug to rotate only when inserted in the correct orientation. This asymmetric mechanical design eliminates the need for labels and ensures correct connection regardless of operator attention or lighting conditions.
2Reliability
If rotation-restraining structures are added to prevent misconnection, then connection correctness is improved, but device complexity increases
Solution Approach 1:
The patent merges the rotation-restraining function with the existing quick coupling structure by integrating the pawl and ratchet teeth into the plug and socket bodies. Rather than adding separate complex locking mechanisms, the design combines the rotation prevention feature with the basic coupling elements, allowing the same structural components to serve both connection and orientation control functions simultaneously.
Solution Approach 2:
The rotation-restraining structure is implemented locally at the critical interface where the plug meets the socket. The asymmetric pawl and ratchet teeth are positioned only at the necessary locations to prevent misconnection, rather than requiring complex structures throughout the entire assembly. This localized approach minimizes overall device complexity while achieving the reliability goal.
Data Source
AI summary
A quick coupling set includes a socket and a mating plug. The socket has a rotation-restraining structure while the mating plug has a mating rotation-restraining structure. In the coupling of the socket and the mating plug, the rotation-restraining structure of the socket only allows the rotation-restraining structure of the mating plug to relatively rotate in a rotation direction, so as to complete the coupling of the socket and the mating plug.