Lead Pipe Slitter Assembly for Clean Slicing Without Deformation
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Solution Overview
Problem
Existing technologies fail to adequately slit and replace lead water lines due to lead's softness causing deformation and subsequent installation difficulties, as conventional slitters deform rather than slice the pipe effectively.
Innovation Solution
A pipe slitter assembly with a single blade oriented perpendicularly to the longitudinal axis, featuring a 21-degree included angle and adjustable width, is used to slice lead pipes cleanly, accompanied by an expander and cable system to facilitate replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional slitters are used to cut lead pipes, then the cutting action is performed, but the softness of lead causes deformation rather than clean slicing
Solution Approach 1:
The blade geometry parameters are specifically optimized with a 21-degree included angle and perpendicular orientation to the longitudinal axis. These parameter changes enable the blade to slice through soft lead material cleanly without causing deformation, resolving the contradiction between achieving a clean slit and maintaining structural integrity during the cutting process.
Solution Approach 2:
Instead of using a traditional cutting approach that pushes through the material, the blade is designed to slice through the lead pipe by orienting the edge perpendicular to the longitudinal axis. This inverted approach allows the blade to cut rather than deform the soft lead material, achieving clean separation without compromising the surrounding pipe structure.
2Reliability
If multiple blades are used to slit the pipe, then the slitting action is more robust, but the complexity of the blade assembly increases
Solution Approach 1:
The invention extracts the essential slitting function to a single blade rather than using multiple blades. This single blade with optimized geometry (21-degree included angle, perpendicular to longitudinal axis) performs the complete slitting action, reducing assembly complexity while maintaining reliable and effective pipe separation.
Solution Approach 2:
The single blade is designed with universal functionality to handle the entire slitting process. By optimizing its geometry and orientation, one blade performs the work that would traditionally require multiple blades, simplifying the assembly while ensuring reliable slitting of the lead pipe throughout its circumference.
3Manufacturing precision
If the blade edge is oriented parallel to the longitudinal axis, then the blade structure is simpler, but the slit quality deteriorates due to deformation
Solution Approach 1:
The blade edge orientation parameter is changed from parallel to perpendicular relative to the longitudinal axis. This parameter change, combined with the 21-degree included angle, enables the blade to slice through the lead pipe cleanly without deformation, significantly improving slit quality while the perpendicular orientation itself becomes the defining characteristic of the simplified design.
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 solution ensures a clean, complete slit of lead pipes, allowing easy installation of new pipes by preventing deformation and ensuring a precise, efficient replacement process.
Implementation Method 1
one and only one blade extending from an outer surface of the hollow cylinder... The blade comprises an edge... The edge of the blade has an included angle substantially equal to 21 degrees... pulling the cable through the underground pipe such that the edge slits the underground pipe
Data Source
AI summary
A pipe slitter assembly for lead pipe. The slitter assembly is configured to be pulled by a cable which is disposed through several of the various components of the assembly. At the lead of the assembly is a slitter, having one and only one blade. The blade has an edge which is oriented at a right angle to the longitudinal axis of the cable. The edge is created by two adjoining walls meeting at an included angle of about 21 degrees. Behind the blade may be various adaptors, and an expander. The expander opens the slit pipe, such that a pipe puller may be used to pull a replacement pipe into the void created by the slitter assembly. The slit pipe may be removed or left in the subsurface around the newly introduced replacement pipe.