Anti-rotation Coupling Device for Compressed Air Lines
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Solution Overview
Problem
Existing coupling devices for compressed air lines in sewer pipes are prone to unintentional opening due to torsional stress, lacking effective anti-rotation mechanisms to secure the connection between the coupling body and plug.
Innovation Solution
A coupling device with an anti-rotation element integrated into the coupling body and a corresponding anti-twist counter-element in the coupling plug, made from robust and corrosion-resistant materials like stainless steel, ensuring a torsion-proof connection while allowing controlled decoupling, and featuring a safety unit for secure locking and unlocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a screw lock or anti-twist device is used to prevent unintentional opening, then the coupling connection is secured against rotation, but the device complexity increases and the coupling length increases
Solution Approach 1:
The patent integrates the anti-rotation function directly into the coupling body and coupling plug by forming anti-rotation elements (protrusions and corresponding recesses) as integral parts of the coupling components. This merging of the anti-rotation mechanism with the main coupling structure eliminates the need for separate screw locks or anti-twist devices, thereby reducing device complexity while maintaining coupling connection security.
Solution Approach 2:
The anti-rotation elements are pre-formed as integral parts of the coupling body and coupling plug during manufacturing. This preliminary action ensures that the anti-rotation function is already built into the structure before assembly, eliminating the need for additional locking mechanisms or complex assembly steps, thus reducing both device complexity and coupling length.
2Reliability
If a robust anti-rotation mechanism is implemented, then the coupling device becomes torsion-proof, but the outer diameter and length of the coupling device increase
Solution Approach 1:
The anti-rotation elements are nested within the coupling body and coupling plug structure itself. The protrusions and recesses are formed within the existing coupling geometry, allowing the anti-rotation function to be embedded without adding external length or diameter to the coupling device. This nesting approach maintains torsion resistance while keeping the coupling device compact.
Solution Approach 2:
Instead of adding anti-rotation mechanisms that extend the coupling length axially, the patent implements anti-rotation elements that operate in the radial dimension through protrusions and recesses. This dimensional shift allows torsion resistance to be achieved without increasing the coupling device length, as the anti-rotation function is accomplished through radial features rather than axial extensions.
3Length of moving object
If the coupling device is made compact, then the outer diameter and length are reduced, but the anti-rotation capability may be compromised
Solution Approach 1:
The patent applies local quality by concentrating the anti-rotation function in specific localized areas of the coupling body and coupling plug through protrusions and recesses. Rather than distributing anti-rotation features throughout the entire coupling structure (which would increase size), the anti-rotation capability is localized to specific geometric features that engage precisely when needed, maintaining compact dimensions while ensuring reliable anti-rotation capability.
Data Source
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Figure 5~6
AI summary
A coupling device for a compressed air line comprises a coupling base body (2) and a coupling plug (3) that can be detachably connected to the coupling base body (2), wherein the coupling base body (2) and the coupling plug (3) are connected to each other in a connected arrangement in a rotationally secure manner with respect to a longitudinal axis (5).