Conical Pipe Fitting Assembly for Sequential Cutting Ring Sealing
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Solution Overview
Problem
Existing pipe fittings fail to effectively secure the cutting ring within the socket, leading to insufficient cutting and potential leakage due to improper engagement of cutting edges during assembly.
Innovation Solution
A pipe fitting design featuring a socket with internal and external cones that engage with a cutting ring, where the counter bearing applies force along the longitudinal centerline to press the cutting ring into the socket, ensuring sequential cutting edge engagement and secure assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cutting ring is not properly secured in the socket, then the assembly is easier to manufacture, but the cutting effectiveness is insufficient and leakage occurs
Solution Approach 1:
The patent employs conical surfaces (curved geometry) for both the socket's receiving cavity and the cutting ring's outer surface. The cone angle of the cutting ring's outer surface is designed to be smaller than the cone angle of the socket's receiving cavity, creating a tapered interference fit. This curved geometric relationship ensures proper engagement and securing of the cutting ring within the socket, preventing leakage while maintaining manufacturing feasibility.
2Manufacturing precision
If the cutting edges do not engage sequentially, then the assembly process is simpler, but proper cutting and sealing cannot be achieved
Solution Approach 1:
The conical geometry of both the socket's receiving cavity and the cutting ring's outer surface creates a self-aligning tapered interface. The smaller cone angle of the cutting ring compared to the socket ensures that as the cutting ring is inserted, the cutting edges engage the pipe end section in a controlled sequential manner from the small end toward the large end, achieving precise engagement without complex assembly procedures.
3Reliability
If the socket fully receives the counter bearing, then the assembly is more stable, but the cutting ring cannot be properly pressed into position
Solution Approach 1:
The socket's receiving cavity is segmented into two functional zones: an upper portion that partially receives the counter bearing (providing positioning support) and a lower portion that fully receives and secures the cutting ring (ensuring cutting effectiveness). This segmentation allows the counter bearing to be positioned stably while enabling the cutting ring to be pressed into the correct position for proper engagement with the pipe end section.
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 design ensures robust and fluid-tight connections by allowing sequential cutting edge penetration into the pipe end, preventing movement of the cutting ring and enhancing sealing, suitable for pressures up to 4000 bar.
Implementation Method 1
The counter bearing is preferably used to apply a force to the cutting ring and to press it into the socket
Implementation Method 2
During assembly, i.e. during the production of a connection between a pipe and the pipe fitting, the counter bearing exerts a force on the cutting ring, preferably along a longitudinal centerline of the cutting ring
Data Source
AI summary
A pipe fitting (1) is supposed to comprise a socket (5), a cutting ring (3) and a counter bearing (4), wherein the pipe fitting (1) comprises four cones (13, 14, 16, 17), wherein the cones (13, 14, 16, 17) are dimensioned and arranged in such a way that during the production of the working position, first the first cutting edge (11) and then the second cutting edge (12) cuts into a surface of a pipe end section (2).