High Pressure Pipe Coupling Extended Sleeve
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Solution Overview
Problem
Existing high-pressure pipe coupling constructions face limitations due to short axial clamping length, leading to potential failure under high pressures, as the clamping force is concentrated over a short portion of the sleeve clamping parts, resulting in ineffective force transfer and increased risk of premature failure.
Innovation Solution
Incorporating an extended sleeve part that utilizes the capstan effect to enhance force transfer by winding threads around a liner part, providing additional support and preventing slippage, while maintaining the benefits of traditional coupling designs such as easy pipe insertion and cost-effective manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the axial clamping length of sleeve clamping parts is increased to improve force transfer, then the force transfer effectiveness is improved, but the insertion of pipe wall becomes difficult and manufacturing costs increase
Solution Approach 1:
The coupling is divided into two functional segments: traditional sleeve clamping parts for pipe insertion and clamping, and an extended sleeve part for force transfer. This segmentation allows each part to be optimized for its specific function without compromise.
Solution Approach 2:
The solution extends the coupling in the axial dimension by adding the extended sleeve part, thereby increasing the effective clamping length for force transfer without affecting the insertion process which occurs in the radial dimension.
2Reliability
If the axial clamping length of sleeve clamping parts is increased to improve force transfer, then the force transfer effectiveness is improved, but the manufacturing complexity and costs increase
Solution Approach 1:
The coupling is divided into two functional segments: traditional sleeve clamping parts for pipe insertion and clamping, and an extended sleeve part for force transfer. This segmentation allows each part to be optimized for its specific function without compromise.
Solution Approach 2:
The solution extends the coupling in the axial dimension by adding the extended sleeve part, thereby increasing the effective clamping length for force transfer without affecting the insertion process which occurs in the radial dimension.
3Ease of manufacture
If the axial clamping length is kept short to simplify manufacture, then the manufacturing cost is reduced, but the force transfer effectiveness decreases leading to premature failure
Solution Approach 1:
The coupling is divided into two functional segments: traditional sleeve clamping parts for pipe insertion and clamping, and an extended sleeve part for force transfer. This segmentation allows each part to be optimized for its specific function without compromise.
Solution Approach 2:
The solution extends the coupling in the axial dimension by adding the extended sleeve part, thereby increasing the effective clamping length for force transfer without affecting the insertion process which occurs in the radial dimension.
4Device complexity
If the clamping force is concentrated over a short portion of the sleeve, then the sleeve clamping parts can be shorter, but the thread slippage risk increases under high pressure
Solution Approach 1:
The coupling is divided into two functional segments: traditional sleeve clamping parts for pipe insertion and clamping, and an extended sleeve part for force transfer. This segmentation allows each part to be optimized for its specific function without compromise.
Solution Approach 2:
The solution extends the coupling in the axial dimension by adding the extended sleeve part, thereby increasing the effective clamping length for force transfer without affecting the insertion process which occurs in the radial dimension.
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 extended sleeve part significantly improves the load-bearing capacity of the coupling, ensuring reliable operation under high pressures by distributing the clamping force more effectively and preventing thread slippage, thus enhancing the overall durability and performance of the coupling construction.
Implementation Method 1
an extended sleeve part which provides several additional advantages to the coupling... This effect is comparable to the so-called capstan effect which occurs when winding an anchor cable around a bollard
Implementation Method 2
the sleeve clamping parts are pressed towards one another whereby the pipe wall is squeezed. In this process, one or both sleeve clamping parts is/are plastically deformed, in such a way that a permanent connection between the pipe and the coupling is obtained
Data Source
Figure 1~2
AI summary
A high pressure pipe coupling construction comprises a coupling (1) as well as at least one high pressure pipe (11) connected to said coupling, said pipe having a wall (17) comprising a liner (12), a reinforcement (13) comprising helically wound reinforcement threads (15, 16) surrounding the liner, and a coating (14) surrounding said reinforcement, said coupling (1) comprising a coupling piece (2) provided with an outer sleeve (4) and an inner sleeve (5) having respectively outer (6) and inner (8) sleeve clamping parts which overlap each other and between which an axial end of the pipe wall (17) is clamped. The outer sleeve (4) is provided with an extended sleeve part (7) which protrudes with respect to both overlapping sleeve clamping parts (6, 8) in the direction facing away from said axial end of the pipe wall (17).