Pipe Lining Former for Uniform Cross-Section
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Solution Overview
Problem
Existing methods for producing pipe linings often result in uneven cross-sections due to continuous pressure forcing the hardening mass into pipe wall holes and require access at both ends of the pipe, leading to inconsistent thickness and inefficiencies.
Innovation Solution
A device with a former that guides along the pipe axis, creating a consistent annular gap between the pipe wall and the former, allowing the hardenable mass to harden without continuous pressure, ensuring stability and uniform thickness by maintaining a predetermined distance and using spacers for support, enabling the mass to harden and cure without pressure-induced unevenness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous pressure is applied to force the hardening mass into the pipe wall holes, then the mass fills the holes, but the cross-section becomes uneven and thickness becomes inconsistent
Solution Approach 1:
The invention transitions from static pressure application to dynamic movement. The former moves along the pipe axis, creating a moving sealing zone that allows the mass to harden progressively as it moves forward, eliminating the need for continuous pressure while maintaining uniform thickness
Solution Approach 2:
The sealing edge at the front of the former performs preliminary sealing action before the mass is applied. This creates a controlled environment where the mass can harden uniformly without being forced into holes, preventing cross-section unevenness while ensuring complete filling
2Ease of manufacture
If access at both ends of the pipe is required for lining operations, then the lining can be applied from both directions, but the process complexity and time increase
Solution Approach 1:
The invention inverts the conventional approach by using a moving former that progresses along the pipe from one end, rather than requiring simultaneous access from both ends. The former acts as a moving mold that creates the lining progressively, eliminating the need for bidirectional access while maintaining lining quality
Solution Approach 2:
The former serves as an intermediary device that enables one-end access operations. It moves along the pipe axis, carrying the sealing edge and mass supply, and creates the lining progressively as it moves, replacing the need for complex bidirectional coordination
3Strength
If the hardening mass is held against the pipe wall by continuous pressure, then the mass adheres to the wall, but the mass is forced into recesses creating uneven cross-section
Solution Approach 1:
The invention replaces static pressure holding with dynamic movement. The former moves along the pipe axis at a controlled speed, allowing the mass to adhere to the wall through the moving sealing action rather than continuous pressure, preventing forced entry into recesses
Solution Approach 2:
The moving former creates periodic sealing and mass application zones as it progresses along the pipe. This periodic action allows the mass to harden in controlled segments, maintaining adhesion strength while preventing uneven cross-section formation
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 method produces a pipe lining with a consistent cross-section, preventing mass from being forced into recesses and allowing for one-end access, resulting in a stable and uniformly thick lining without the need for continuous pressure application.
Implementation Method 1
introducing a hardenable mass... which hardens easily within a short period of time... curable compositions that harden without starting the hardening by elevated temperature and/or irradiation
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to a device and a method for producing a pipe lining in a pipe by introducing a curable mass, wherein the mass is pumped through an outlet into an annular gap formed by the pipe wall and the device arranged in the pipe. The device includes a former which is guided in the pipe at a predetermined distance from the pipe wall along the pipe axis, such that the annular gap between the pipe wall and the former has a predetermined cross-section.