Tapping Sleeve Tightening Assembly with Intermediate Bearing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current tapping sleeve designs for fluid carrying pipes face challenges in achieving a secure and leak-proof connection, particularly when branching into different pipe materials like ductile iron or concrete, due to inadequate sealing and radial force distribution.
Innovation Solution
The improved tapping sleeve assembly features a configuration with a first and second shell member, a gasket, and a connecting assembly with side bar elements and bolt receiving lugs, which allows for tightening and sealing by applying radial forces through a specially designed bearing unit that includes adjustable bearing projections and lugs with moment reaction wings, ensuring a secure and flexible seal across varying pipe diameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional A-lug type connection assembly is used to tighten the tapping sleeve, then the structure is simple and easy to manufacture, but the radial force distribution is inadequate leading to poor sealing performance
Solution Approach 1:
The connection assembly is segmented into multiple functional components: side bar elements with upper and lower legs, bolt receiving lugs, and intermediate bearing units. This segmentation allows each component to perform a specific function in distributing radial forces, improving sealing performance while maintaining manufacturing feasibility through modular construction
Solution Approach 2:
Intermediate bearing units are introduced as intermediary elements between the side bar elements and the shell members. These bearing units mediate the force transmission by providing bearing surfaces that distribute radial forces along the longitudinal axis, enhancing sealing without requiring direct complex connections between all components
2Reliability
If the tapping sleeve is tightened to achieve a secure seal, then leakage is prevented, but radial outward forces may damage the pipe or compromise the seal
Solution Approach 1:
The connection assembly uses opposing side bar elements (first and second side bar elements) that apply counteracting radial forces. The intermediate bearing units positioned between these elements create a balanced force system where inward tightening forces are distributed to counteract outward radial forces, protecting the pipe while maintaining seal integrity
Solution Approach 2:
The problem of radial force management is solved by introducing the longitudinal dimension through intermediate bearing units that extend along the longitudinal axis. This transforms the force distribution from a purely radial problem to a three-dimensional force system, allowing forces to be distributed both radially and longitudinally for better balance
3Adaptability or versatility
If the tapping sleeve design is made flexible to accommodate different pipe diameters and materials, then adaptability improves, but the structural complexity increases
Solution Approach 1:
The side bar elements with multiple bolt receiving lugs and intermediate bearing units serve multiple functions: they provide structural support, distribute radial forces, accommodate different pipe diameters through the longitudinal extension of bearing surfaces, and work with both single-piece and multi-piece shell members. This multi-functionality achieves adaptability without proportionally increasing complexity
Data Source
AI summary
A tapping sleeve assembly comprising a sleeve having first and second shells, a gasket, a connection assembly comprising first and second side bar elements connected to the first and second shells, respectively, multiple lugs extending from the first and second side bar elements, and a bolt extending between each of the respective lugs, the first side bar element comprising an upper leg connected to the first shell at an upper connection, a lower leg supporting at least one of the lugs, an intermediate bearing unit configured to bear against the first shell, and the bearing unit having at least one bearing surface not affixed to the outer surface of the first shell, whereby the first and second side bar elements may be drawn towards each other to tighten the sleeve to a conduit.