Platinum Composite Tube Branch Heating Control
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Solution Overview
Problem
Conventional methods for electrically heating platinum or platinum-alloy composite tube structures in glass manufacturing apparatuses often result in local overheating or underheating of branch tubes, leading to temperature inconsistencies and potential defects in molten glass quality, such as bubbles or deflected streams, due to inadequate energization control based on temperature differences between corners and other parts of the tube.
Innovation Solution
The method involves dividing the energizing path of the branch tube into two separate paths and performing independent energization control for each, allowing for precise temperature management to prevent local overheating and ensure uniform heating of the branch tube, thereby maintaining the quality of molten glass.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single energizing path is used for the branch tube, then the structure is simple, but local overheating occurs at corners due to current concentration
Solution Approach 1:
The energizing path for the branch tube is divided into two separate paths: a first energizing path from the first main tube through the first corner to the second corner, and a second energizing path from the second main tube through the second corner to the first corner. This segmentation distributes the current flow across multiple paths, preventing current concentration at individual corners and eliminating local overheating.
2Temperature
If independent energization control is implemented for each path, then temperature distribution is improved, but control system complexity increases
Solution Approach 1:
Independent energization control is implemented for each energizing path by providing separate power supplies: a first power supply for the first energizing path and a second power supply for the second energizing path. This allows different current intensities to be applied to different paths based on local temperature requirements, achieving uniform temperature distribution throughout the branch tube while maintaining manageable control complexity through modular power supply design.
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 approach prevents excessive or insufficient heating of the branch tube, reduces the time required to reach desired temperatures, and minimizes the occurrence of reboiling and mixing of molten glass, ensuring consistent glass quality and efficient vacuum degassing processes.
Implementation Method 1
many platinum or platinum-alloy hollow tubes are equipped with electrodes so as to be electrically energized and heated
Implementation Method 2
dividing an energizing path for the branch tube into a first energizing path from the first main tube to the branch tube and a second energizing path from the branch tube to the second main tube
Data Source
AI summary
There is provided a method for electrically energizing and heating a platinum or platinum-alloy composite tube structure having a structure including a first main tube, a second main tube, and a branch tube connecting the first main tube and the second main tube, which prevents a local part of the branch tube from being electrically energized and heated in an excessive or insufficient manner.There is provided a method for electrically energizing and heating a platinum or platinum-alloy composite tube structure having a structure including a first main tube, a second main tube, and a branch tube connecting the first main tube and the second main tube, the method comprising dividing an energizing path for the branch tube into a first energizing path from the first main tube to the branch tube and a second energizing path from the branch tube to the second main tube; and performing energization control for the first energizing path and energization control for the second energizing path independently of each other.