Waterjet Pipe Replacement for Quiet Reinforced Concrete Cutting
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Solution Overview
Problem
Existing pipeline replacement devices for reinforced concrete drainage pipes face issues with poor breaking effect, long working time, loud noise, and frequent tool wear, necessitating a more efficient and cost-effective solution for replacing old pipes without causing environmental pollution.
Innovation Solution
A pipeline replacement device equipped with a waterjet cutting component that cuts old pipelines into blocks using high-pressure water, eliminating the need for preheating and reducing tool wear, combined with a waste transportation mechanism and soil scraping mechanism to facilitate efficient block transportation and soil management, while using micro-inertial measurement units for precise alignment and adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If pneumatic picks or tooth wheels are used to forcefully break the pipe wall, then the pipe breaking function is achieved, but the breaking effect is poor, working time is long, and working noise is loud
Solution Approach 1:
The patent replaces the mechanical breaking system (pneumatic picks or tooth wheels) with a water jet cutting system. High-pressure water jets are used to cut through the reinforced concrete pipe walls, eliminating the need for mechanical contact and forceful breaking. This substitution resolves the contradiction by providing clean, precise cuts without the noise, wear, and inefficiency of mechanical breaking methods.
Solution Approach 2:
The patent employs hydraulic principles by using high-pressure water jets to cut the pipe walls. The water jet cutting component utilizes pressurized fluid to achieve cutting through the concrete structure, replacing mechanical force with hydraulic energy. This approach improves breaking efficiency and eliminates the poor breaking effect and loud noise associated with mechanical methods.
2Ease of manufacture
If pneumatic picks or tooth wheels are used to break the pipe wall, then cutting function is achieved, but cutting tools are extremely prone to wear and tear requiring regular replacement
Solution Approach 1:
The patent eliminates mechanical cutting tools by substituting them with a water jet cutting system. Since water jets do not undergo mechanical wear like tooth wheels or pneumatic picks, the cutting mechanism requires no regular replacement or maintenance. This resolves the contradiction between achieving cutting capability and minimizing tool maintenance.
Solution Approach 2:
The water jet cutting system is inherently self-maintaining as the cutting medium (water) does not wear out. The system continuously delivers fresh high-pressure water to the cutting point, eliminating the wear and tear problem of mechanical tools. This self-service characteristic resolves the maintenance frequency issue while preserving cutting capability.
3Productivity
If excavation type method is used to replace old pipes, then pipe replacement is achieved, but significant impact on surrounding residents and traffic occurs, and damage to cables or other pipelines may happen
Solution Approach 1:
The patent extracts the cutting and replacement operation from the traditional excavation process. By using water jet cutting to break the pipe wall from within the pipeline, the method eliminates the need for large-scale excavation that impacts surrounding residents and traffic. The harmful external effects are removed while preserving the pipe replacement capability.
Solution Approach 2:
The water jet acts as an intermediary tool that enables pipe replacement without direct mechanical excavation. The high-pressure water cuts through the pipe wall and allows new pipe insertion without exposing the surrounding environment to the harmful effects of excavation, thus resolving the contradiction between replacement capability and environmental impact.
4Productivity
If waterjet cutting component is used to cut old pipelines, then cutting efficiency is improved and tool wear is eliminated, but device complexity increases
Solution Approach 1:
The patent uses hydraulic technology (water jet system) to achieve cutting, which while technologically advanced, is a well-established and relatively simple system compared to mechanical breaking mechanisms. The water jet cutting component replaces complex mechanical breaking systems with a streamlined hydraulic cutting solution, resolving the contradiction between improved cutting efficiency and 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
The device achieves efficient cutting and transportation of pipeline blocks with reduced noise and no need for regular tool replacement, saving time and costs, and ensures accurate replacement with minimal environmental impact.
Implementation Method 1
a cutting mechanism, comprising a waterjet cutting component arranged on a front end of the shell
Data Source
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AI summary
The present invention relates to the technical field of underground drainage pipeline replacement, and its object is to provide a pipeline replacement device and a method for using the pipeline replacement device. This pipeline replacement device has low working noise, good cutting effect, short working time and does not need to regularly replace a cutting mechanism. The foregoing pipeline replacement device comprises: a shell, a cutting mechanism, a waste transportation mechanism and a jacking mechanism; the cutting mechanism comprises a waterjet cutting component arranged on a front end of the shell; the waste transportation mechanism is arranged inside the shell and configured to transport cut pipeline blocks from the waterjet cutting component to a rear end of the shell; a driving end of the jacking mechanism is able to abut against the rear end of the shell to push the shell to move in a direction away from the jacking mechanism. The present invention solves the problems of poor breaking effect, long working time, loud working noise, and the need for regular replacement of cutting tools when a reinforced concrete pipeline replacement device in the prior art needs to use a pneumatic pick or a tooth wheel to forcefully break the pipe wall.