Flexible Tapping Sleeve Structure for Mixed-Material Pipe Sealing
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Solution Overview
Problem
Existing tapping sleeves for pipes lack flexibility and adaptability, particularly when transitioning between different pipe materials like steel and PVC/HDPE, which can lead to inadequate sealing and increased hoop stress, limiting their effectiveness in 'hot tapping' applications.
Innovation Solution
A tapping sleeve design featuring a flexible shell region with integral kerfs, allowing for a monolithic structure with a cap and tapped shell portion, and a clamp that compressively couples these portions, enabling a water-tight seal and accommodating varying pipe diameters through a flexible, three-dimensional shape that can be easily installed without separate fasteners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid tapping sleeve structure is used, then manufacturing precision and structural strength are improved, but adaptability to different pipe materials and flexibility during installation deteriorate
Solution Approach 1:
The patent applies a flexible shell structure with integral kerfs (cuts) that allow the tapping sleeve to bend and adapt to different pipe materials such as steel, PVC, and HDPE. The flexible region with kerfs enables the rigid shell portions to conform to the specific pipe being tapped, resolving the contradiction between structural strength and adaptability to different pipe materials.
2Strength
If a rigid tapping sleeve structure is used, then structural strength is improved, but flexibility and ease of installation deteriorate
Solution Approach 1:
The flexible shell region with integral kerfs allows the tapping sleeve to be bent and shaped during installation to fit around the pipe, significantly improving ease of installation while maintaining structural strength through the rigid shell portions that clamp onto the pipe.
Solution Approach 2:
The shell is segmented into a rigid tapped shell portion, a flexible region with kerfs, and a rigid cap shell portion. This segmentation allows the rigid portions to provide structural strength while the flexible segmented region provides ease of installation by allowing bending and shaping.
3Adaptability or versatility
If traditional separate fasteners are used, then adaptability is improved, but device complexity and manufacturing precision deteriorate
Solution Approach 1:
The patent merges the fastening function into the shell structure itself through integral kerfs that act as built-in fasteners. The kerfs create friction and mechanical interlocking with the pipe, eliminating the need for separate fasteners and reducing device complexity while maintaining adaptability to different pipe sizes and materials.
Solution Approach 2:
The integral kerfs in the flexible shell region provide self-fastening capability by creating friction and mechanical interlocking with the pipe surface during installation. The structure serves its own fastening function without requiring additional separate fasteners, reducing device complexity.
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 flexible design enhances the sleeve's ability to handle hoop stresses, reduces manufacturing complexity, and provides a cost-effective solution for secure connections across different pipe materials, ensuring a reliable fluid-tight seal without interrupting service.
Implementation Method 1
The flexible shell region is more flexible than the tapped shell portion and the cap shell portions
Implementation Method 2
flexing a flexible shell region of a shell by widening a shell between a tapped shell portion and a cap shell portion
Implementation Method 3
The clamp can compressively couple the tapped shell portion to the cap shell portion across the circumferential reach
Data Source
AI summary
A tapping sleeve is described comprising a flow channel. The flow channel comprises an inlet and an outlet. A shell partially surrounds the flow channel. The shell comprises a cap shell portion, a flexible shell region, a tapped shell portion, and a clamp extending across a circumferential reach between the tapped shell portion and the cap shell portion. The clamp extends across the circumferential reach between the tapped shell portion and the cap shell portion to secure the tapping sleeve on the pipe. In the closed position, the clamp couples the tapped shell portion to the cap shell portion, and the flexible shell region is interposed between and more flexible than the tapped shell portion and the cap shell portion.