Distributed Magnetic Pipeline Inspection for Narrow Pipe Sections
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Solution Overview
Problem
Conventional magnetic flux leakage inspection technology using a central cylinder as a magnetic circuit results in strong magnetism, making it difficult to integrate components susceptible to magnetic interference, increasing manufacturing and maintenance costs, and complicating the structure, while also hindering passage through narrow pipe areas.
Innovation Solution
A pipeline in-line inspection tool utilizing distributed magnetic uniformity sensing with a mobile carrier and probe inspection assemblies that magnetize the pipeline without a central cylinder, allowing for easier tool layout, improved integration, and simplified structure, enabling passage through narrow areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a central cylinder is used as the magnetic circuit, then the magnetization effect is strong, but the structure becomes complex and components susceptible to magnetic interference cannot be integrated
Solution Approach 1:
The patent divides the inspection tool into multiple independent probe inspection assemblies distributed along the mobile carrier, eliminating the need for a central cylinder. Each assembly independently magnetizes and inspects a specific section of the pipeline, achieving segmentation of the magnetic circuit function while reducing overall structural complexity.
Solution Approach 2:
The patent extracts and removes the central cylinder component from the system entirely. Instead of using a centralized magnetic circuit, the magnetic inspection function is distributed to multiple probe assemblies that contact the pipeline wall directly, taking out the problematic central structure while preserving the essential magnetization and inspection capabilities.
2Reliability
If a central cylinder is used as the magnetic circuit, then magnetization is achieved, but equipment integration is poor and manufacturing cost increases
Solution Approach 1:
The inspection tool is segmented into multiple standardized probe assemblies that can be manufactured independently and assembled on the mobile carrier. This modular segmentation enables standardized production processes, reduces manufacturing complexity, and lowers overall equipment costs while maintaining effective magnetization capability through distributed probe arrangements.
Solution Approach 2:
The probe inspection assemblies are designed as multi-functional units that can magnetize the pipeline, detect defects, and be easily assembled/disassembled on the mobile carrier. This universal design allows the same probe assembly structure to be reused multiple times along the pipeline, reducing the number of unique components needed and lowering manufacturing costs.
3Reliability
If a central cylinder is used as the magnetic circuit, then inspection coverage is achieved, but the tool cannot pass through narrow pipe areas
Solution Approach 1:
The inspection system is divided into multiple compact probe assemblies distributed along a flexible mobile carrier. This segmentation allows the tool to navigate narrow and complex pipe areas by having the mobile carrier move through the pipeline while probes extend to contact the wall, providing inspection coverage without requiring a large centralized structure.
Solution Approach 2:
The probe assemblies are designed with elastic inspection ends that can dynamically adjust their position and contact force with the pipeline wall. This dynamic capability allows the probes to adapt to varying pipe geometries and narrow areas, maintaining inspection coverage while navigating through challenging pipeline sections.
4Device complexity
If distributed probe assemblies are used, then equipment integration is improved and structure simplified, but multiple probes are needed for coverage
Solution Approach 1:
Each probe assembly is designed as a universal multi-functional unit that can be positioned at multiple locations along the pipeline. The same standardized probe design serves multiple inspection positions, reducing the variety of unique components needed. While multiple probes are required for full coverage, their standardization simplifies the overall structure and reduces complexity compared to a centralized system.
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 tool effectively detects internal and external pipeline defects with reduced equipment size, weight, and cost, enhancing inspection resolution and facilitating navigation through narrow pipe sections.
Implementation Method 1
the pipeline is magnetized through the excitation structure
Implementation Method 2
magnetic flux leakage inspection technology is often used to detect pipelines
Data Source
AI summary
A pipeline in-line inspection tool based on distributed magnetic uniformity sensing includes a mobile carrier and a probe inspection assembly. The mobile carrier moves in a pipeline, a plurality of probe inspection assemblies are arranged on an outer side of the mobile carrier, and the plurality of probe inspection assemblies are distributed in sequence along an axis of the mobile carrier. The probe inspection assembly includes a plurality of elastic inspection ends, and the plurality of elastic inspection ends are distributed and arranged around the axis of the mobile carrier. The elastic inspection end is provided with an excitation structure, an inspection component and a wear-resistant structure. During inspection, the elastic inspection end is in abutment with an inner wall of the pipeline, the pipeline is magnetized through the excitation structure, and pipeline defects in magnetized areas are detected through the inspection component.