Multi-pipe Burner with Thickened Joint Portions
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Solution Overview
Problem
In multiple tube burners for synthesizing porous materials, stress applied to the gas introducing portion can cause relative position variations between glass tubes, affecting the manufacturing of porous preforms and manufacturing conditions.
Innovation Solution
A multiple tube burner design where glass tubes are arranged coaxially with thicker joint portions on the gas introducing side to increase rigidity, maintaining relative positions even under stress, featuring a central first glass tube with outer second and third tubes connected with thicker joint sections compared to their spouting sides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple glass tubes are connected on the gas introducing side, then gas can be fed into each tube, but stress causes relative position variations between glass tubes
Solution Approach 1:
The joint portion of the second glass tube is designed with different thickness than the gas spouting side portion. Specifically, the joint portion has a thickness that is 2-6 times greater than the gas spouting side portion, creating localized reinforcement at the connection point to resist stress-induced position variations while maintaining normal operation.
2Manufacturing precision
If the joint portion thickness is increased to maintain rigidity, then relative positions remain stable, but the structure becomes more complex
Solution Approach 1:
Instead of uniformly thickening the entire glass tube, the invention applies local quality by increasing thickness only at the joint portion where stress is applied. The joint portion thickness is controlled to be 2-6 times that of the gas spouting side portion, providing targeted reinforcement without excessive overall complexity.
3Ease of manufacture
If uniform thickness is used throughout the glass tube, then manufacturing is simple, but stress causes position variations affecting preform quality
Solution Approach 1:
The invention transitions from uniform thickness to non-uniform thickness distribution, with the joint portion having 2-6 times the thickness of the gas spouting side portion. This localized thickening provides the necessary rigidity to maintain relative positions during stress while preserving ease of manufacture through controlled thickness variation.
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 increased rigidity of joint portions in the multiple tube burner maintains the relative positions of glass tubes, suppressing adverse influences on the porous preform and manufacturing conditions, enabling stable production and improved reproducibility.
Implementation Method 1
a thickness near a joint portion of the second glass tube connected with the first glass tube is thicker than a thickness of the second glass tube on the gas spouting side
Implementation Method 2
glass microparticles that are formed by feeding flammable gas, auxiliary gas, and a glass raw material into a burner for synthesizing glass microparticles to cause flame hydrolysis reaction
Data Source
Figure 1
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AI summary
In a multiple tube burner for synthesizing a porous material, three or more glass tubes are arranged coaxially with one another, the glass tubes having a substantially circular shape on a cross section perpendicular to a longitudinal direction. Out of the three or more glass tubes, a first glass tube and a second glass tube that is arranged on an outer side of the first glass tube are connected with each other on a gas introducing side, and a thickness near a joint portion of the second glass tube connected with the first glass tube is thicker than a thickness of the second glass tube on the gas spouting side. A third glass tube is arranged on an outer side of the second glass tube, coaxially with the second glass tube, the second glass tube and the third glass tube are connected with each other on the gas introducing side, and a thickness of a portion from the joint portion of the second glass tube connected with the first glass tube up to a joint portion connected with the third glass tube is thicker than a thickness on the gas spouting side.