Sliding Sleeve Pipe Connection With Pre-Stop Axial Fixing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Sliding sleeve connections in all-plastic or plastic composite pipes are prone to relative motion and weakening of the axial fixing, leading to a higher risk of pipe disconnection due to the risk of the expanded end displacing towards the circumferential collar during axial press-fitting.
Innovation Solution
Incorporating a pre-stop between the circumferential collar and the nearest external rib limits the axial sliding of the elastically deformable polymer sleeve, creating a hollow space for the sleeve to bend towards the support body, enhancing stability and resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sliding sleeve is axially press-fitted onto the expanded end of the pipe, then the axial fixing is achieved, but the expanded end may be further displaced towards the circumferential collar, leading to weakening of the axial fixing and increased risk of disconnection
Solution Approach 1:
The pre-stop is positioned in advance between the circumferential collar and the nearest circumferential external rib to limit the axial sliding distance of the sliding sleeve. This preliminary structural arrangement prevents the expanded end from being displaced too far towards the circumferential collar during the press-fitting process, thereby maintaining the stability of the axial fixing.
Solution Approach 2:
The pre-stop acts as an intermediary element that mediates between the circumferential collar and the sliding sleeve. It provides a mechanical stop that controls the axial movement of the sliding sleeve, preventing excessive displacement of the expanded end while still allowing sufficient movement for proper installation.
2Reliability
If the sliding sleeve is made of elastically deformable polymer material to achieve form fit, then the axial fixing is enhanced, but the sleeve may bend during press-fitting, requiring additional space for deformation
Solution Approach 1:
The pre-stop creates a hollow space in the axial dimension that accommodates the bending deformation of the sliding sleeve. By providing this additional space between the pre-stop and the circumferential collar, the sliding sleeve can bend towards the support body during press-fitting without interfering with other components, thus maintaining the form fit and axial fixing strength.
3Volume of moving object
If the pre-stop is positioned closer to the circumferential collar, then more space is available for sleeve bending, but the axial sliding limitation is reduced
Solution Approach 1:
The position of the pre-stop is optimized to balance two parameters: the axial sliding distance limitation and the hollow space volume for bending. By adjusting the axial position of the pre-stop between the circumferential collar and the nearest circumferential external rib, the design achieves an optimal compromise that provides sufficient sliding limitation while accommodating the necessary deformation space.
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 solution significantly increases the stability and resistance of the sliding sleeve connection, reducing the risk of pipe disconnection by providing a mechanical fix and distributing forces effectively, while maintaining a secure fit and sealing.
Implementation Method 1
the sliding sleeve made of an elastically deformable polymer material is bent in the final connection towards the support body
Data Source
AI summary
A sliding sleeve connection between an expanded end of an all-plastic pipe or of a plastic composite pipe and a connecting element includes an expanded end of an all-plastic pipe or of a plastic composite pipe; a connecting element having at least one support body provided with circumferential external ribs, onto which the expanded end of the all-plastic pipe or of the plastic composite pipe is slid, and at least one circumferential collar; and a sliding sleeve made of elastically deformable polymer material axially slid onto the expanded end. The connecting element includes a pre-stop between the circumferential collar and the nearest circumferential external rib to the latter. The pre-stop constitutes a limitation for sliding onto the end of the pipe. The end of the sliding sleeve facing the circumferential collar protrudes beyond the end of the pre-stop facing the circumferential external rib.