Vacuum Double-Pipe Loading Joint With Dual Insulators and Gas Gap
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Solution Overview
Problem
The fluid loading joint connecting vacuum double pipes fails to achieve both electrical insulation and high thermal insulation performance due to thermal conduction through the insulation sheet.
Innovation Solution
Incorporating an annular inner insulator between the inner pipes and an annular outer insulator between the outer pipes, with a gas space positioned between them, to electrically insulate the first half from the second half and suppress external heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If one annular insulation sheet is used to electrically insulate the first half and second half, then electrical insulation is achieved, but thermal insulation performance deteriorates due to thermal conduction through the insulation sheet
Solution Approach 1:
The single insulation sheet is segmented into two separate annular insulators (inner insulator and outer insulator) positioned at different radial locations. This segmentation allows each insulator to serve dual purposes: electrical insulation and thermal insulation, while the gas space between them eliminates thermal conduction paths
Solution Approach 2:
A gas space is introduced as an intermediary medium between the inner insulator and outer insulator. This gas space acts as a thermal barrier that prevents heat conduction while allowing the insulators to maintain their electrical insulation function, thus resolving the contradiction between electrical and thermal insulation requirements
2Reliability
If the insulation sheet is placed between the first half and second half, then electrical insulation is achieved, but external heat enters the passage due to thermal conduction
Solution Approach 1:
The insulation system is segmented into radially spaced annular insulators rather than using a single continuous insulation sheet. This segmentation creates discrete thermal barriers that are more effective at blocking heat conduction paths from the external environment to the passage
Solution Approach 2:
The gas space serves as an intermediary thermal barrier between the inner and outer insulators, preventing direct thermal conduction. This intermediary layer blocks the heat transfer path that would otherwise conduct external heat into the passage through the insulation structure
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 configuration effectively achieves electrical insulation and high thermal insulation performance by preventing heat transfer between the insulators while maintaining the structural integrity and functionality of the joint.
Implementation Method 1
A vacuum space is formed between the inner pipe and the outer pipe
Implementation Method 2
A gas space is formed between the first blocking member and the second blocking member, and the gas space is filled with helium gas
Data Source
AI summary
A fluid loading joint includes: a first half provided at an end of a first vacuum double pipe, the first half including a first inner pipe, a first outer pipe, and a first blocking member blocking between the first inner pipe and the first outer pipe; a second half provided at an end of a second vacuum double pipe, the second half including a second inner pipe, a second outer pipe, and a second blocking member blocking between the second inner pipe and the second outer pipe; an annular inner insulator interposed between the first inner pipe and the second inner pipe; and an annular outer insulator interposed between the first outer pipe and the second outer pipe, the outer insulator surrounding the inner insulator, with a gas space positioned between the outer insulator and the inner insulator, the gas space being formed between the first blocking member and the second blocking member.