Threaded Module Pipe Connections for Underground Installation
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Solution Overview
Problem
Existing methods for installing or replacing underground pipes require constant mechanical force to maintain module pipe connections, which can lead to disengagement during the installation process due to frictional forces, especially when space is limited or the material is non-bending and stiff.
Innovation Solution
The method involves using module pipes with threaded connections at both ends, allowing them to be screwed together without the need for constant backforce, and can be connected to a pulling element using a pipe pulling connector or quick lock, enabling stable and friction-reduced installation using push/pull units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If module pipes are connected using click or push-together type connections, then the installation process can proceed with modular pipes, but the connections may disengage during installation due to frictional forces requiring constant mechanical support
Solution Approach 1:
The pipe sections are pre-assembled into modular units with threaded connections before installation. This preliminary assembly ensures proper connection geometry and thread engagement, allowing the modules to be screwed together securely without requiring constant mechanical support during the pulling operation
Solution Approach 2:
The connection mechanism is replaced from friction-dependent click or push-together types to thread-based mechanical engagement. The threaded connections provide positive mechanical interlocking that resists disengagement forces during installation, eliminating the need for constant hydraulic or mechanical support
2Reliability
If constant mechanical force is applied to maintain module pipe connections, then connection stability is improved, but the complexity of the installation equipment and process increases
Solution Approach 1:
The threaded pipe connections are designed to maintain their own stability through self-locking thread geometry and proper thread engagement. Once the modules are screwed together, the connections self-maintain their integrity during the pulling operation without requiring external hydraulic clamps or mechanical push devices to apply constant force
3Reliability
If hydraulic or mechanical push clamps are used to maintain constant pushing force on pipe sections, then connection stability is improved, but the loss of energy and increased device complexity occur
Solution Approach 1:
The threaded connections self-maintain their mechanical interlock during the pulling operation through the inherent geometry of threaded fastening. The pipe sections remain securely connected without requiring continuous energy input from hydraulic systems or mechanical actuators, eliminating the energy loss associated with maintaining constant pushing force
Data Source
AI summary
The invention relates to a method for renovation and replacement of existing underground pipes and/or the installation of new pipes by using module pipes. The method comprises the step of screwing a second and further module pipe together with the first or consecutive module pipe, if the first or consecutive module pipe has mainly been pushed or pulled into the existing underground pipe.