Pipe Coupling Insert Assembly for Rigid Gap-Spanning Joints
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Solution Overview
Problem
Existing pipe coupling methods fail to provide a watertight connection without moving rigid pipe sections, especially in scenarios where one end of a new pipe section is already coupled, and they often disrupt the inner profile of the pipe, violating code requirements for smooth flow in systems like sewage pipes.
Innovation Solution
A pipe coupling system comprising a tubular insert and two half-tubular fitting sections that snap-lock together, enveloping the insert and existing pipe ends to form a continuous tubular section, maintaining the inner profile and allowing for code-compliant connections without requiring movement of the pipe sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a standard sleeve coupling is used to connect two pipe ends, then a watertight joint can be achieved, but the pipe sections must be moved or adjusted during installation
Solution Approach 1:
The coupling device is divided into three main segments: a first coupling section that connects to the first pipe end, a second coupling section that connects to the second pipe end, and an intermediate section that bridges the gap between them. This segmentation allows each section to be independently positioned and secured, eliminating the need to move the pipe sections while achieving a reliable watertight connection.
Solution Approach 2:
The intermediate section acts as an intermediary element that spans the gap between the two pipe ends. It includes an intermediate outer surface that interfaces with both pipe ends and provides a bonding surface for adhesive application, enabling watertight sealing without requiring the pipes to be moved into direct contact.
2Ease of manufacture
If fittings or couplings are installed on rigid pipe ends, then connections can be made, but the inner profile of the pipe is disrupted, violating code requirements for smooth flow
Solution Approach 1:
The coupling device employs different structural characteristics at different locations: the inner surfaces that contact the pipe interiors are designed to be smooth and substantially coplanar with the pipe ends to maintain flow profile, while the outer surfaces and bonding surfaces are designed with features for secure attachment and watertight sealing. This local differentiation allows connection capability without inner profile disruption.
Solution Approach 2:
The coupling sections extend radially outward from the pipe surfaces, utilizing the radial dimension to provide bonding surfaces and connection features without protruding into the pipe's internal flow path. This dimensional arrangement allows the coupling mechanism to operate outside the pipe interior, preserving the smooth inner profile while enabling secure connections.
3Reliability
If one end of a new pipe section is already coupled to existing piping, then that connection is secured, but the second end cannot be coupled because it is abutting the existing pipe end
Solution Approach 1:
The coupling device is segmented into distinct coupling sections that can be independently positioned. The first coupling section attaches to the already-secured pipe end, while the second coupling section is designed to engage with the abutting pipe end through the intermediate section, enabling both connections to be made without moving the pipes.
Solution Approach 2:
The intermediate section is designed to bridge the gap between pipe ends in advance, providing a bonding surface and structural bridge that enables the second coupling section to attach to the abutting pipe end. This preliminary configuration of the intermediate section allows the second connection to be made without requiring pipe movement.
Data Source
AI summary
A pipe coupling for coupling a first pipe to a second pipe wherein a gap exists between a first pipe end and a second pipe end. The pipe coupling includes a tubular insert configured to fit within the gap and match an inside diameter and outside diameter of the pipes, thereby providing a through-butt joint between the insert and the pipes. The pipe coupling also includes a half-tubular first fitting section and a half-tubular second fitting section, configured to snap-lock and form a tubular shape over the insert, the first pipe end and the second pipe end. In some embodiments, the insert is integral with the fitting sections.