Synthetic Pipe Coupling Assembly With Rotating Lock Washer
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Solution Overview
Problem
Existing assemblies of synthetic cylindrical pipes and couplings face challenges in being connected on-site in a watertight, environmentally friendly, and glue-free manner, particularly with materials like polyethylene, polypropylene, and polyvinyl chloride, where gluing may not be advisable.
Innovation Solution
The assembly features an insertion part with a grip ring and pinching ring mechanism that uses a wedge action to securely engage the pipe, along with a circumferential seal and washer system, allowing for connection without glue and enabling reuse and increased engagement for rotational fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a pipe coupling is designed to securely engage a synthetic pipe through mechanical means (grip ring and pinching ring), then the connection strength and reliability are improved, but the device complexity increases due to multiple moving parts and mechanisms
Solution Approach 1:
The grip ring is nested within the pinching ring, and both are contained within the casing. The grip ring can move axially within the pinching ring's confines, allowing the smaller component to operate independently while being constrained by the larger structure. This nesting approach secures the pipe through multiple concentric rings without requiring separate mounting structures.
Solution Approach 2:
The pipe coupling is divided into distinct functional segments: the grip ring for initial pipe engagement and positioning, the pinching ring for applying radial compression, and the washer for final locking. Each segment performs a specific function in the connection sequence, allowing the complex connection task to be broken down into manageable steps with dedicated components.
2Adaptability or versatility
If the washer is designed to rotate into multiple positions (standby, fixed, disassembling) to provide different engagement levels, then the adaptability and versatility of the connection are improved, but the ease of operation decreases due to the additional rotational steps required
Solution Approach 1:
The washer is designed as a dynamic component that can rotate to different angular positions relative to the casing, transitioning between standby, fixed, and disassembling positions. This rotational freedom allows the same component to provide multiple connection modes (loose, secured, or fully locked) without requiring different parts, adapting to various installation and operational requirements.
Solution Approach 2:
The single washer component serves multiple functions depending on its rotational position: in the standby position it allows free pipe insertion and rotation, in the fixed position it locks the pipe axially and radially, and in the disassembling position it releases all constraints. This multi-functionality consolidates what could be multiple separate components into one versatile element.
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
This solution enables on-site, watertight connections of synthetic pipes without the need for gluing, ensuring environmental sustainability and allowing for the creation of three-dimensional pipe systems that can be incorporated into concrete, while also facilitating easy disassembly and reuse of the pipe coupling.
Implementation Method 1
the pinching ring is provided with an inner surface oriented towards the grip ring for wedge action onto the grip ring
Implementation Method 2
a circumferential seal within the casing which spaced apart from the grip ring engages around and onto the pipe with a pressure force
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
The invention relates to an assembly of a synthetic cylindrical pipe and a pipe coupling for connection to the synthetic pipe, wherein the pipe coupling comprises an insertion part having an insertion opening for in an insertion direction inserting the synthetic pipe into the pipe coupling, wherein the insertion part comprises a synthetic casing that is provided with a circumferential insertion wall in which the pipe fits, wherein via a first diameter step the insertion wall merges into a first circumferential accommodation wall having a larger inside diameter than the insertion wall, wherein the insertion part comprises a grip ring that engages around the inserted pipe, a pinching ring for wedge action onto the pinching ring, a seal that engages onto the pipe, and a washer that engages onto the casing, wherein the washer can be rotated relative to the casing from a predetermined standby position into a predetermined fixed position and/or into a predetermined disassembling position.