Rotating Pipeline Coating Head With Induction Heating
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Solution Overview
Problem
Existing pipeline coating technologies require multiple steps and equipment movements, leading to inefficiencies such as overheating and increased energy consumption, and can result in de-bonding of factory-applied coatings due to human error during field joint coating processes.
Innovation Solution
A rotating applicator machine with an induction coil and coating material applicator that simultaneously heats and coats a section of pipeline, minimizing overheating and energy use by targeting only the necessary area, and includes features like elongate induction coils and radial nozzle arrangements to ensure even coating and reduce overspray.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional multi-step coating processes are used with separate heating and coating equipment, then coating can be applied to pipeline sections, but the process requires multiple equipment movements and causes overheating of factory-applied coatings leading to de-bonding
Solution Approach 1:
The patent combines the heating function and coating application function into a single integrated applicator machine. The heating element and coating applicator are mounted together on the same frame, allowing both functions to be performed in one continuous operation without moving separate equipment, thereby preventing overheating and de-bonding of factory-applied coatings
Solution Approach 2:
The patent implements continuous heating and coating application in a single pass along the pipeline. The applicator machine moves continuously along the pipeline while simultaneously heating and applying coating, eliminating interruptions and multiple equipment movements that cause thermal cycles and de-bonding
2Productivity
If traditional separate heating and coating processes are used, then coating can be applied, but energy consumption increases due to heating larger areas and multiple process steps
Solution Approach 1:
The patent applies heating and coating only to the specific localized area where coating is needed, rather than heating large sections of pipeline. The heating element is positioned to heat only the immediate area in front of the coating applicator, minimizing energy consumption while maintaining high productivity
Solution Approach 2:
By merging heating and coating into one simultaneous process, the patent eliminates the energy waste associated with heating pipeline sections multiple times during separate operations. The single-pass approach reduces total energy consumption while improving coating application efficiency
3Manufacturing precision
If traditional coating application methods are used, then coating can be applied to pipeline sections, but cycle time increases due to multiple process steps and equipment movements
Solution Approach 1:
The patent maintains continuous motion of the applicator machine along the pipeline while simultaneously heating and applying coating. This continuous operation eliminates the time losses associated with stopping, moving separate equipment, and transitioning between process steps, thereby reducing cycle time while maintaining coating quality
Solution Approach 2:
The heating element is positioned to pre-heat the pipeline surface immediately before the coating applicator arrives. This preliminary heating ensures the surface is at the optimal temperature for coating application as the coating is being applied, maintaining manufacturing precision without adding extra process steps or time
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
This solution reduces cycle time, minimizes energy consumption, prevents de-bonding of factory-applied coatings, and ensures a consistent, efficient coating process by heating only the pipeline surface under the induction coil to the minimum application temperature, while also collecting and re-cycling overspray for environmental benefits.
Implementation Method 1
an induction coil configured to heat a section of pipeline adjacent to the induction coil to a coating material application temperature
Implementation Method 2
the coating material applicator is arranged to spray coating material through an aperture through the induction coil
Data Source
AI summary
An applicator machine and a process for heating and coating a section of pipeline. The applicator machine includes a frame configured to rotate about a section of pipeline to be heated and coated, rotating means operable to rotate the frame, and coating material applicators induction coils and radiant heaters mounted on the frame and rotatable therewith. The induction coil is configured to heat a section of pipeline adjacent to the induction coil to a coating material application temperature. The radiant heaters are configured to heat factory-applied coatings. Each coating material applicator sprays coating material through an aperture in a respective induction coil. The applicator includes an enclosure configured to surround a section of pipeline and provision for evacuating and collecting waste coating material. The coating material applicator may be configured to spray powder coating material, such as fusion bonded epoxy powder material and/or chemically modified polypropylene powder material.