Conical Profile End Stopper for Tool-Free Liner Removal
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Solution Overview
Problem
Existing end stoppers for packers in pipe and sewer rehabilitation are laborious and cumbersome to remove after use, requiring significant effort with tools like angle grinders.
Innovation Solution
The end stopper is designed with modular, lightweight profile parts made of high-strength aluminum or other materials, featuring conical shapes and reversible connections, along with a deflection roller unit for easy assembly and disassembly, and adaptable components for various packer systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional end stoppers are used in packer systems, then structural stability and sealing function are achieved, but removal becomes laborious and cumbersome requiring angle grinders and significant effort
Solution Approach 1:
The end stopper is divided into multiple separable components including a body, cover part, and profile parts that can be independently removed. This segmentation allows the end stopper to maintain structural integrity during use while enabling easy disassembly for removal without requiring cutting tools like angle grinders.
Solution Approach 2:
The end stopper incorporates movable and adjustable components such as the cover part that can be opened and closed, and profile parts that can be repositioned. This dynamic design allows the end stopper to be securely assembled during operation but easily disassembled for removal, transforming a static difficult-to-remove structure into a dynamic easy-to-remove system.
2Strength
If end stoppers are made from traditional materials like steel, then strength and stability are achieved, but weight increases making handling more burdensome
Solution Approach 1:
The end stopper utilizes composite construction combining aluminum profile parts with plastic or rubber sealing elements. The aluminum provides the necessary structural strength and stability while being significantly lighter than traditional steel, and the sealing elements provide the required sealing function. This composite approach achieves both strength and weight reduction simultaneously.
Solution Approach 2:
Different parts of the end stopper are made from materials optimized for their specific functions: aluminum for structural components requiring strength-to-weight ratio, and plastic/rubber for sealing surfaces requiring elasticity and sealing capability. This local material optimization ensures each component contributes to overall strength while minimizing unnecessary weight.
3Adaptability or versatility
If end stoppers are designed as single integrated units, then manufacturing simplicity is achieved, but adaptability to different packer systems is reduced
Solution Approach 1:
The end stopper is designed as a modular system with standardized profile parts, body components, and cover parts that can be independently manufactured and then assembled in different configurations. This segmentation enables the same basic components to adapt to various packer system requirements while maintaining manufacturing efficiency through standardized part production.
Solution Approach 2:
The end stopper incorporates universal interface features and standardized profile parts that can accommodate different packer system requirements. The modular design with interchangeable components allows a single end stopper design to serve multiple applications and packer types, enhancing versatility without requiring completely different designs for each application.
Data Source
AI summary
An end stopper (10) for liner systems for pipe and sewer rehabilitation with a liner which is arranged between two end stoppers (10) and can be acted upon by a pressure medium and can be applied reversibly to the circumference of the end stopper (10), is characterized in that the end stopper (10) is composed, in cross section, of a plurality of profile parts (100, 101, 102, 103, 104, 105) which are of part annular and/or part tubular shape and are conical, wherein at least one profile part (100) has a configuration that tapers conically from the inside to the outside.