Press Fitting Check Ring Segmentation for Verification
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Solution Overview
Problem
Existing press fittings lack a reliable method to verify proper pressing and often result in misalignment and dirt accumulation due to the design of the gripping ring and check rings, which are prone to damage and difficult to use.
Innovation Solution
A press fitting with a check ring featuring break segments and a coupling part that becomes visible upon pressing, ensuring the action is confirmed and minimizing dirt accumulation, while guiding the pipe end for proper alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gripping ring with grasping teeth is placed in the press region, then the pipe end can be securely gripped after pressing, but the grasping teeth may hinder the insertion of the pipe end and cause misalignment during pressing
Solution Approach 1:
The check ring is divided into breakable segments that can separate during pressing. This segmentation allows the segments to move out of the way during insertion, then reassemble to provide checking function after pressing, resolving the conflict between secure gripping and easy insertion
Solution Approach 2:
The check ring acts as an intermediary element between the pressing tool and the pipe end. It provides a visible indication of pressing status without interfering with the primary gripping function of the gripping ring, mediating between the pressing action and the final secured connection
2Loss of information
If a check ring is added to verify pressing status, then pressing verification is enabled, but the device complexity increases
Solution Approach 1:
The check ring is designed to be self-indicating through its breakable segments. The segments automatically break or move during pressing and provide visible feedback without requiring additional sensors, electronics, or complex verification mechanisms, thus enabling information provision without significant complexity increase
Solution Approach 2:
The check ring utilizes visual changes (breakage of segments, position changes) to indicate pressing status. This visual feedback mechanism is simple and direct, providing clear information about pressing completion without adding complex detection systems
3Ease of operation
If the press region is made thin-walled to allow compression, then the pressing action can be effective, but the structural strength is reduced
Solution Approach 1:
The check ring segments are pre-positioned to break or move during the pressing action. This preliminary positioning allows the thin-walled press region to compress effectively while the check ring segments provide structural support during insertion, then break to indicate completion, balancing strength and compressibility
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 provides a user-friendly and reliable method to verify pressing, ensuring alignment and sealing, and reducing dirt accumulation by making the coupling part visible and shielding gaps.
Implementation Method 1
The press region is deformable from a non-compressed state towards a compressed state by a radially inward directed pressing action causing the press wall part to radially compress
Implementation Method 2
The one or more break segments are forced to break free by means of shear forces along those one or more separation parts from the coupling part by the pressing action
Data Source
AI summary
A press fitting for pipes includes a socket with an insert opening for a pipe end. An annular groove-shaped space present in a press wall part of a press region is delimited by a limitation edge. A gripping ring is placed in the groove-shaped space. The press region is deformable from a non-compressed state a compressed state by a radially inward directed pressing action causing the press wall part to radially compress and the gripping ring to grip the pipe end. A check ring is provided which has one or more break segments and a coupling part. The break segments can be forced to break free by the pressing action, while the coupling part then comes to lie visible at least partly in between the limitation edge and the pipe end.