Bi-Directional Pipeline Pig With Counter-Rotating Cleaning Blades
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Solution Overview
Problem
Existing pipeline cleaning tools, or 'pigs', are limited in their ability to effectively remove debris from the interior surfaces of fluid-carrying conduits due to fixed scraping members and disks that fail to agitate debris sufficiently, leading to frequent cleaning operations and unavoidable buildup of immoveable debris.
Innovation Solution
An improved pipeline pig apparatus featuring counter-rotating cleaning blades mounted on a tubular shaft, where the blades frictionally contact the conduit wall, imparting rotation and enhancing debris removal capabilities, allowing for effective cleaning in both forward and backward directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed scraping members and disks are used in conventional pigs, then the structure is simple and easy to manufacture, but the cleaning effectiveness is limited and debris cannot be sufficiently agitated
Solution Approach 1:
The patent transforms fixed scraping members into rotatable cleaning elements with blades that can rotate about the longitudinal axis. This dynamic configuration allows the cleaning elements to agitate debris more effectively through rotational motion while being propelled by fluid flow, resolving the contradiction between cleaning effectiveness and structural simplicity.
Solution Approach 2:
The cleaning apparatus is divided into multiple cleaning elements distributed along the longitudinal axis, each with its own rotatable blades. This segmentation allows independent rotation of each cleaning element, enhancing overall cleaning effectiveness while maintaining a modular structure that is manageable in complexity.
2Adaptability or versatility
If fixed scraping members are used, then the apparatus is simple to operate, but the pig cannot clean the conduit in reverse or exert lateral force on debris
Solution Approach 1:
The rotatable cleaning elements with angled blades can rotate in either direction depending on fluid flow direction, enabling the pig to clean the conduit in both forward and reverse directions. The blades are designed to exert lateral force on debris during rotation, providing versatility without significantly complicating operation.
Solution Approach 2:
The cleaning elements serve multiple functions: they scrape debris during forward motion, can rotate in reverse to clean during backward motion, and exert lateral forces on debris through their angled blade configuration. This multi-functionality increases adaptability while maintaining ease of operation through passive fluid-driven rotation.
3Productivity
If conventional fixed disks are used to push debris downstream, then the motive force is amplified, but the debris buildup is unavoidable and cleaning frequency must be increased
Solution Approach 1:
The rotatable cleaning elements continuously agitate and remove debris through rotational motion driven by fluid flow, preventing debris buildup more effectively than fixed disks. This continuous dynamic cleaning action reduces the frequency required while maintaining higher pipeline efficiency between cleanings.
Solution Approach 2:
The cleaning elements operate continuously throughout the pig's traversal of the conduit, providing ongoing debris removal rather than periodic action. This continuous useful action minimizes debris accumulation and extends the time between required cleaning operations, improving overall productivity.
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 counter-rotating cleaning blades provide a more thorough and efficient removal of debris from the conduit walls, reducing the frequency of cleaning operations and minimizing the buildup of immoveable debris, thus enhancing pipeline efficiency and reducing costs.
Implementation Method 1
the blades frictionally contact the conduit wall, imparting rotation and enhancing debris removal capabilities
Data Source
AI summary
An improved apparatus and methodologies of use for cleaning debris and contaminants from an interior surface or sidewall of a fluid-carrying conduit, such as a pipeline, are provided. More particularly, an apparatus and methodologies of use are provided, wherein the apparatus or ‘pipeline pig’ operates bi-directionally and comprises counter-rotating cleaning elements that are operative to enhance removal of debris and contaminants from the pipeline.