Longitudinal Pipe Cutter Rail Alignment for Buried Access
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Solution Overview
Problem
Existing pipe cutting tools are ineffective for cutting pipes longitudinally without damaging the internal contents, particularly when the pipes are buried or partially accessible.
Innovation Solution
A longitudinal pipe cutting tool with a main body featuring a rail and two arms, a holder with rotatable blades, and an actuator system that allows precise alignment and cutting of pipes along their length without compromising internal contents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a pipe cutter tool is used to cut pipes cross-sectionally, then the pipe can be cleanly cut without creating burrs, but the tool is ineffective for longitudinal cutting and cannot access buried pipes
Solution Approach 1:
The tool is divided into separate functional modules: a holder assembly that can be positioned at different locations along the pipe, a blade assembly that can be engaged or disengaged, and a rail system that provides guidance. This segmentation allows the tool to adapt to different cutting orientations and access configurations, including longitudinal cutting of buried pipes.
Solution Approach 2:
The invention transitions from traditional cross-sectional cutting (one-dimensional approach) to longitudinal cutting by extending the cutting action along the length of the pipe (adding a second dimension). The rail system and holder positioning enable the blade to travel parallel to the pipe axis, achieving cutting in a new dimensional orientation.
2Ease of operation
If existing cutting tools are used on buried pipes, then the pipes can be cut, but the internal contents are disturbed or damaged
Solution Approach 1:
The cutting function is extracted into a separate, movable blade assembly that can be engaged with the pipe exterior without requiring access to the interior. The blade rotates against the outer surface of the pipe, completely isolating the cutting action from the internal contents while maintaining effective cutting capability.
Solution Approach 2:
The rail system and holder assembly serve as intermediary structures that bridge the gap between the operator and the buried pipe. These components provide a stable platform for blade engagement while maintaining a controlled distance from the pipe interior, preventing direct contact or disturbance to internal contents.
3Manufacturing precision
If a longitudinal cutting tool is designed with precise alignment capabilities, then accurate cutting along the pipe length is achieved, but the device complexity increases
Solution Approach 1:
The rail system is designed to follow the natural curvature and alignment of the pipe, creating an equipotential guide path that automatically maintains proper cutting alignment. By conforming to the pipe's existing geometry rather than imposing rigid external alignment constraints, the system achieves precision without adding complex alignment mechanisms.
Solution Approach 2:
The holder assembly incorporates self-aligning features that automatically position the blade correctly relative to the pipe as it engages with the rail system. The design uses the pipe itself and the rail geometry to provide alignment references, eliminating the need for separate alignment adjustment mechanisms and reducing overall device complexity.
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
Enables efficient and precise longitudinal cutting of pipes, allowing for maintenance or repair without disturbing the internal contents, and is suitable for pipes with diameters up to 5 cm and cut lengths up to 61 cm.
Implementation Method 1
a plurality of blades mounted in the holder on respective pins coupled with the holder, the blades rotatable around the respective pins
Data Source
AI summary
A longitudinal pipe cutting tool includes a holder having a cutting wheel rotatable in a cutting plane along a longitudinal direction of a work piece. The longitudinal pipe cutting tool also including an actuator configured to move at least one of the holder or the work piece toward each other or away from each other, and a body coupled with the actuator. The body also slideable coupled with the holder such that the holder extends away from the body transverse to the longitudinal direction of the work piece and the cutting plane.