Single-Piece Grinding Device for Pipe Renovation Material Removal
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Solution Overview
Problem
Existing methods for removing epoxy resin-impregnated pipe renovation material are slow, consume excessive materials, and generate dust, making it inefficient and costly to disassemble and reline pipes due to failed lining operations.
Innovation Solution
A grinding device with a single-piece body and cutters, designed to rotate within a pipe, allowing efficient removal of pipe renovation material in both forward and transverse directions, utilizing a flexible rotation shaft and pressure-bearing system to minimize damage and enhance removal speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If sanding plates or grinding chains are used to remove pipe renovation material, then the material can be removed, but the removal process is very slow and consumes excessive sanding material
Solution Approach 1:
The patent replaces the traditional sanding mechanism with a mechanical cutting system using carbide-tipped cutters that physically chop and remove the epoxy resin lining. This substitution of mechanical cutting for abrasive sanding dramatically reduces sanding material consumption while increasing removal speed, as the cutters directly fracture and eject the renovation material rather than gradually wearing it away through friction
Solution Approach 2:
The grinding device employs composite construction with a steel body and carbide-tipped cutters, combining the toughness of steel with the extreme wear resistance of carbide. This composite approach allows the cutters to withstand the high forces required to break through cured epoxy resin while maintaining sharp edges, thereby achieving fast removal speeds without excessive material consumption
2Object-generated harmful factors
If sanding plates or grinding chains are used to remove pipe renovation material, then the material can be removed, but excessive dust is formed
Solution Approach 1:
The patent replaces the dust-generating sanding process with a mechanical cutting system that fractures the epoxy resin into larger chips and fragments rather than reducing it to fine dust. The carbide-tipped cutters chop through the renovation material, producing manageable debris that can be more easily contained and removed, thereby reducing harmful dust formation while maintaining high removal speeds
3Ease of operation
If sanding devices are used to remove pipe renovation material, then the material can be removed, but the device is difficult to carry forward in a complex pipe line
Solution Approach 1:
The grinding device is segmented into a compact modular design with a small-diameter body that can navigate complex pipe geometries and bends. The device's compact form factor allows it to be easily pushed through and repositioned within the pipe system, maintaining ease of operation while the cutting mechanism ensures rapid material removal when engaged
Solution Approach 2:
The device employs a flexible drive shaft mechanism that allows it to navigate bends and complex pipe configurations. The flexible transmission system enables the grinding device to follow the pipe's geometry while maintaining rotational power delivery to the cutters, ensuring both mobility in complex layouts and sustained removal speed
4Ease of manufacture
If sanding is used to open pipe walls, then the pipe renovation material can be removed, but the pipe walls require additional cleaning
Solution Approach 1:
The patent replaces the sanding process with mechanical cutting that fractures the epoxy resin into discrete chips and fragments. This cutting action produces cleaner pipe walls with larger, more easily removed debris particles rather than fine dust, reducing the time and effort required for subsequent cleaning operations while maintaining efficient material removal
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 grinding device significantly reduces the time and material consumption required for removing pipe renovation material, allowing for faster re-lining attempts without damaging the pipe, thus reducing costs and time associated with pipe renovation.
Implementation Method 1
a grinding device for removing pipe renovation material from a pipe... at least one cutter... for grinding pipe renovation material
Data Source
Figure 1
Figure 2~3
AI summary
The invention discloses a grinding device for removing pipe renovation material from a pipe (38), the grinding device comprising at least one cutter (12, 22, 32), a body (10, 20, 30) and fastening means (14, 16, 24, 26) for fastening the grinding device to a rotation shaft. The grinding device is characterized in that the body (10, 20, 30) and the at least one cutter (12, 22, 32) are accomplished of a single piece for grinding pipe renovation material both in the forward direction of the grinding device and in a direction transverse to the forward direction. In addition, a system for removing pipe renovation material from the pipe (38) and use of the grinding device for removing pipe renovation material from the pipe (38) are disclosed.