Plastic Pipe Connection Sleeve With Audible Insertion Stop
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing connection devices for plastic pipes lack a reliable method to confirm proper insertion into a sleeve without visual access to the connection point, especially when assembly conditions obscure visibility.
Innovation Solution
Incorporating a radially displaceable stop made of high-modulus, low-yield-strength plastic that breaks acoustically at a predetermined point, providing an audible confirmation of proper insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a viewing opening is provided in the sleeve to visually check insertion depth, then insertion verification is possible, but verification cannot be performed when visibility is obscured
Solution Approach 1:
The patent replaces the visual inspection mechanism (viewing opening) with an acoustic signal mechanism. The breaking point generates an audible sound when the pipe is properly inserted, allowing verification without visual access to the connection point.
Solution Approach 2:
The patent changes the verification parameter from visual (light transmission through viewing opening) to acoustic (sound emission from breaking point). This parameter change enables verification under obscured visibility conditions where visual inspection is impossible.
2Measurement precision
If an insert with a stop is provided to indicate proper insertion, then insertion verification is possible, but additional components increase device complexity
Solution Approach 1:
The patent merges the stop function and the verification function into a single integrated structure. The breaking point is formed directly in the sleeve wall, eliminating the need for separate insert components while maintaining the verification capability.
Solution Approach 2:
The sleeve structure serves multiple functions: it provides the structural housing, creates the annular gap for pipe insertion, and incorporates the breaking point for verification. This multi-functionality reduces the need for additional specialized components.
3Loss of information
If the stop is held by a predetermined breaking point, then acoustic verification is enabled, but the stop may not remain securely attached after breaking
Solution Approach 1:
The patent designs the breaking point geometry and material properties in advance to ensure that when breaking occurs, the stop automatically remains attached to the sleeve. The breaking point is positioned and dimensioned so that failure occurs in a controlled manner that maintains attachment.
Solution Approach 2:
The patent applies different material properties or structural characteristics to specific locations: the breaking point area has reduced strength or a geometric feature that facilitates controlled breaking, while the attachment areas maintain full strength to ensure the stop remains securely attached after breaking.
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
Ensures acoustic verification of correct pipe insertion, allowing confirmation even in obscured visibility conditions and after disconnection.
Implementation Method 1
the predetermined breaking point breaks cleanly, emitting a distinct breaking sound
Data Source
Figure 1
Figure 2
AI summary
A connection device for a plastic pipe (3) to a connection nipple (1) is described, wherein the connection end (4) of the plastic pipe (3) is held axially between the connection nipple (1) and a clamping sleeve (2) which forms at least one opening (8) in the region of the end face (9) of the connection end (4) of the plastic pipe (3) pushed onto the connection nipple (1), through which opening a stop (7) projects radially inwards and can be displaced radially outwards over the end face (9) of the connection end (4) of the plastic pipe (3), wherein the stop (7) is formed in one piece with the clamping sleeve (2) and is held in a stop position within the opening (8) by means of a predetermined breaking point (12).In order to enable a clean insertion control, the predetermined breaking point (12) breaks when the stop (7) is displaced radially outwards in a way that is clearly audible, for which purpose the stop (7) with the clamping sleeve (2) is preferably made of a plastic with an E-modulus of greater than 1000MPa and a yield strength of less than 8%.