Pipe Connection Assembly with Cutting Ring and Support
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Solution Overview
Problem
Existing connection arrangements for pipes and connecting bodies with conical bores face challenges in assembly complexity due to the risk of the support ring slipping off during visual inspection of the cutting ring's depth, leading to unreliable connections and potential bursting of thin-walled pipes under over-tightening.
Innovation Solution
A connection arrangement featuring a cutting ring with a raised collar and support ring design, where the cutting ring's geometry ensures the support ring cannot slip off during inspection, and radial support prevents deformation and bursting, allowing for secure assembly and disassembly by verifying the cutting depth based on support ring retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the support ring is designed to allow visual inspection of cutting depth by slipping off the pipe, then inspection accessibility is improved, but assembly reliability deteriorates due to risk of support ring slipping off during inspection
Solution Approach 1:
The support ring is designed with a conical bore that receives the cutting ring, creating a nested structure where the cutting ring is contained within the support ring. This nesting prevents the support ring from slipping off the pipe during inspection while still allowing visual verification of cutting depth by observing the cutting ring's position relative to the support ring's conical bore.
2Strength
If the union nut is tightened to ensure secure connection, then connection strength is improved, but pipe bursting risk increases due to over-tightening of thin-walled pipes
Solution Approach 1:
The cutting ring with cutting edges performs preliminary action by cutting into the pipe outer surface to form a raised collar before the union nut is tightened. This pre-cutting action creates a mechanical interlock that prevents pipe pull-out without requiring excessive tightening force, thereby preventing over-tightening and bursting of thin-walled pipes.
Solution Approach 2:
The support ring with conical bore performs preliminary action by receiving and positioning the cutting ring at the correct location on the pipe before the union nut is installed. This preliminary positioning ensures that the cutting ring cuts at the proper depth and location, eliminating the need for excessive tightening force and preventing pipe bursting.
3Reliability
If the cutting ring cuts deeper into the pipe to ensure secure hold, then connection reliability is improved, but pipe wall integrity deteriorates due to excessive cutting depth
Solution Approach 1:
The support ring with conical bore acts as an intermediary that controls and limits the cutting depth of the cutting ring. The conical bore's geometry provides a physical stop that prevents the cutting ring from cutting too deeply into the pipe, ensuring sufficient connection reliability while preserving pipe wall integrity.
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
Simplifies the assembly process by ensuring the support ring remains in place during inspection, prevents pipe constriction, and enhances the connection's reliability and torque resistance, particularly with thin-walled pipes, while reducing the risk of bursting under over-tightening.
Implementation Method 1
a cutting ring (19) which sits in the conical bore (18) of the support ring (15) and has a pressing surface (25) for the application of force through the clamping surface (13) of the union nut (10) and which has at least a first cutting edge (23) and a raised collar (34) in the outer surface of the tube (1) formed by cutting the first cutting edge (23) into the tube (1)
Implementation Method 2
a union nut (10) which can be screwed onto a thread (4) of the connecting body (2) and which forms a clamping surface (13) and is at least indirectly axially supported against the support ring (15)
Implementation Method 3
The cutting ring (19) is subjected to axial force by screwing the union nut (10) onto the connecting body (2)
Data Source
Figure 1
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AI summary
The invention relates to a connecting assembly for connecting a pipe (1) with a connecting element (2) which comprises a conical bore (6) that tapers starting from a face (5). Said connecting assembly comprises: a longitudinal axis, a pipe (1) that can be inserted in the conical bore (6) of the connecting element (2), a supporting ring (15) that has a conical bore (18) flared in the same direction as the conical bore (6) of the connecting element (2), starting from a first retaining surface (37), and that is supported on the face (5) of the connecting element (2) with a second retaining surface (17), and a a union nut (10) that can be screwed onto a thread (4) of the connecting element (2), configures a tensioning surface (13) and is at least indirectly supported by the supporting ring (15) in the axial direction, a cutting ring (19) that is seated in the conical bore (18) of the supporting ring (15), has a pressure surface (25) to be impinged upon by the tensioning surface (13) of the union nut (10) and has at least one first cutting edge (23), and a collar in the external face of the pipe (1), produced when the first cutting edge (23) cuts into the pipe (1), the outer diameter thereof being larger than the smallest internal diameter of the supporting ring (15) and the collar being disposed between the first pipe end and the first retaining face (37).