Pipe Lining Former with Spacers for Uniform Mass Distribution
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Solution Overview
Problem
Existing methods for producing pipe linings, such as those using a hose-shaped bubble to apply hardenable mass, face issues like irregular cross-sections due to continuous pressure, which can press the mass into pipe wall holes, and require access to both ends of the pipe section, leading to inconsistent lining thickness and accessibility challenges.
Innovation Solution
A method and device where a hardenable mass is pumped through an annular gap formed between a pipe wall and a former, which is moved along the pipe axis, allowing the mass to harden uniformly without continuous pressure, and enabling one-end access for pipe lining production, using a device with a forming surface, sealing edge, and spacers to maintain a consistent gap and ensure stable hardening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a hose-shaped bubble is used to apply hardenable mass with continuous pressure, then the mass can be pressed into holes in the pipe wall, but this leads to irregular cross-section of the mass
Solution Approach 1:
The patent removes the hose-shaped bubble from the system and replaces it with a rigid former. This extraction eliminates the continuous pressure problem that caused irregular cross-sections, while the former maintains consistent spacing from the pipe wall to ensure uniform mass application.
Solution Approach 2:
The patent changes the pressure parameter from continuous (bubble method) to intermittent/discontinuous (pump method). The hardenable mass is pumped in without continuous pressure, allowing it to set without being pressed into pipe wall holes, thereby achieving uniform cross-section.
2Manufacturing precision
If access to both ends of the pipe section is required, then complete lining can be achieved, but this reduces accessibility and increases complexity
Solution Approach 1:
Instead of requiring access from both ends and working toward the center, the patent inverts the approach by accessing only one end and working unidirectionally along the pipe. The former is pulled from the access end, and the lining progresses in one direction only.
Solution Approach 2:
The former serves multiple functions: it maintains annular gap spacing, guides the hardenable mass application, and enables unidirectional progression. This multi-functionality allows complete lining with single-end access, eliminating the need for bidirectional operations.
3Manufacturing precision
If the former is moved along the pipe wall with first end ahead, then uniform hardening is achieved, but the device complexity increases
Solution Approach 1:
The former is segmented into functional zones: a leading first end for initial mass application, a body portion with spacers for maintaining annular gap, and a trailing second end. This segmentation allows systematic progression and uniform hardening while keeping each segment's structure relatively simple.
Solution Approach 2:
The spacers act as intermediaries between the former and the pipe wall, maintaining a consistent annular gap. This intermediary function ensures uniform mass distribution and hardening without requiring complex adjustment mechanisms on the former itself.
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 approach allows for a pipe lining with a consistent cross-section, preventing mass from being pressed into recesses and enabling one-end access, resulting in a stable and uniformly thick lining without the need for continuous pressure, thus overcoming the limitations of previous methods.
Implementation Method 1
introducing a hardenable mass, which is pumped through at least one outlet into an annular gap
Data Source
AI summary
The invention concerns a device and a method for producing a pipe lining in a pipe by introduction of a hardenable mass, wherein the mass is pumped through an outlet into an annular gap, which is formed by the pipe wall and the device arranged in the pipe. The device has a former, which is guided within the pipe in a predetermined spacing from the pipe wall along the pipe axis, so that the annular gap between the pipe wall and the former has a predetermined cross-section.