Plug-in Coupling Protective Ring for Sealing Integrity
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Solution Overview
Problem
Existing plug-in couplings for pipes face challenges in protecting the sealing ring from damage during insertion, particularly when the pipe ends are not properly machined, leading to increased construction complexity and space constraints.
Innovation Solution
A protective ring is connected via a predetermined breaking connection to an existing ring body, encasing the pipe end's end face externally, ensuring it is carried along during insertion and separating to prevent damage to the sealing ring, thus simplifying design and handling while minimizing space requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate protective ring is provided to protect the sealing ring from damage during insertion, then the sealing ring is protected from damage, but the device complexity and space requirements increase
Solution Approach 1:
The protective ring is merged with the existing ring body (spacer ring or insertion aid) through a predetermined breaking connection. This combination allows the protective function to be integrated into an existing component rather than adding a separate part, thereby reducing device complexity and space requirements while still providing sealing ring protection during insertion
Solution Approach 2:
The protective ring is connected to the ring body via a predetermined breaking connection that allows the protective ring to separate during insertion. This segmentation enables the protective ring to fulfill its protective function temporarily and then be discarded, avoiding the need for a permanent additional component that would increase device complexity
2Reliability
If a separate protective ring is provided to protect the sealing ring from damage during insertion, then the sealing ring is protected from damage, but the space requirements increase
Solution Approach 1:
The protective ring is merged with the existing ring body (spacer ring or insertion aid) through a predetermined breaking connection. This combination allows the protective function to be integrated into an existing component rather than adding a separate part, thereby reducing device complexity and space requirements while still providing sealing ring protection during insertion
3Reliability
If a protective sleeve is pushed onto the pipe end to protect the sealing ring, then the sealing ring is protected from damage, but handling becomes more difficult and additional loose construction parts are required
Solution Approach 1:
The protective ring is merged with the existing ring body (spacer ring or insertion aid) through a predetermined breaking connection. This combination eliminates the need for separate loose components that would complicate handling, as the protective function is integrated into a component that is already part of the coupling assembly
Solution Approach 2:
The protective ring automatically performs its protective function during the insertion process without requiring separate handling or installation steps. The predetermined breaking connection ensures the protective ring separates at the appropriate moment, making the protection mechanism self-activating and eliminating additional handling requirements
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 solution effectively prevents sealing ring damage by using the protective ring as a driver stop and ensuring proper sealing contact, enhancing handling and reducing construction complexity without additional structural parts.
Implementation Method 1
the retaining claws are subjected to a torque in the opposite direction to the inclination, which increases the contact pressure of the sharp-edged retaining claws on the outer casing of the pipe end and thus ensures safe self-locking with increasing extraction forces
Implementation Method 2
the protective ring is connected via a predetermined breaking connection to an existing ring body
Data Source
Figure 1
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AI summary
The plug-in coupling has a coupling sleeve (1) for receiving a pipe end (2), where a sealing ring (4) is inserted in the coupling sleeve. An annular body has a protective ring (12) connected through a predetermined breaking connection (13) for surrounding the end face of the pipe end from the outside. The protective ring has a U-shaped cross section, and is provided with the annular body spacers (8,9) for a blocking ring (6). The annular body with the protective ring forms an inlet guide (11) for the pipe end. The protective ring is provided between the blocking ring and the sealing ring.