Vacuum Double Pipe Loading Joint With Gas-Gap Thermal Isolation
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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, allowing external heat to enter the passage.
Innovation Solution
A fluid loading joint design featuring annular inner and outer insulators with a gas space in between, positioned between the inner and outer pipes of the first and second halves, along with a gas-filled space between the blocking members, which electrically insulates the halves and suppresses heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If one annular insulation sheet is used between the first half and the 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 annular insulation sheet is segmented into two separate annular insulation sheets positioned at different locations. The first annular insulation sheet is positioned between the first inner pipe and the second inner pipe, while the second annular insulation sheet is positioned between the first outer pipe and the second outer pipe. This segmentation allows each insulation sheet to serve a specific function: the first sheet provides electrical insulation while the second sheet provides thermal insulation, thereby resolving the contradiction between achieving electrical insulation and maintaining thermal insulation performance.
Solution Approach 2:
A gas-filled space is introduced as an intermediary layer between the first annular insulation sheet and the second annular insulation sheet. This gas-filled space acts as a thermal barrier that reduces heat conduction between the inner and outer pipes. The gas-filled space is positioned such that it creates a thermal break in the heat transfer path, thereby improving thermal insulation performance while the insulation sheets maintain electrical insulation.
2Reliability
If the insulation sheet is positioned between the pipes, then electrical insulation is provided, but heat transfer from external environment to the passage increases
Solution Approach 1:
The insulation system is segmented into two separate annular insulation sheets positioned at different radial locations. The first annular insulation sheet is positioned between the first inner pipe and the second inner pipe, while the second annular insulation sheet is positioned between the first outer pipe and the second outer pipe. This segmentation allows the first sheet to provide electrical insulation close to the inner pipe, while the second sheet provides thermal insulation closer to the outer pipe interface, thereby addressing both electrical insulation requirements and heat transfer from the external environment.
Solution Approach 2:
A gas-filled space is introduced as an intermediary thermal barrier between the first annular insulation sheet and the second annular insulation sheet. This gas-filled space reduces heat conduction from the external environment through the pipe walls to the passage, thereby reducing the harmful heat transfer effect while the insulation sheets maintain electrical insulation.
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 design effectively electrically insulates the first and second halves while maintaining high thermal insulation performance by preventing heat transfer from the outer to the inner insulators.
Implementation Method 1
the gas space positioned between the outer insulator and the inner insulator... suppresses the transfer of external heat from the outer insulator to the inner insulator
Implementation Method 2
the first outer pipe forming a vacuum space between the first inner pipe and the first outer pipe... high thermal insulation performance
Data Source
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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.