Vacuum Double Pipe Joint with Shared Evacuation Passage
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Solution Overview
Problem
Conventional vacuum double pipe connecting structures suffer from thermal insulation deterioration and require significant labor to evacuate multiple vacuum double pipes due to thermal conduction through flanges and independent evacuation of each pipe.
Innovation Solution
A connected structure for vacuum double pipes featuring inner and outer pipes with a joint that forms a sealed evacuation passage between them, allowing for simultaneous evacuation and improved thermal insulation by covering the inner pipe with the outer pipe, and connecting multiple pipes through a joint that facilitates shared evacuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flanges are used to seal the gap between inner pipe and outer pipe, then airtight sealing is achieved, but thermal conduction occurs between inner pipe and outer pipe via the flanges, deteriorating thermal insulation property
Solution Approach 1:
The patent introduces a support member as an intermediary component between the inner pipe and outer pipe. This support member provides mechanical support and positioning while minimizing thermal conduction, thus maintaining airtight sealing without significantly deteriorating thermal insulation property. The support member acts as a mediator that balances the conflicting requirements of sealing reliability and thermal insulation.
2Reliability
If each vacuum double pipe is evacuated independently, then each pipe maintains its vacuum, but a large amount of labor is required to evacuate multiple vacuum double pipes
Solution Approach 1:
The patent merges multiple independent evacuation processes into a single integrated evacuation system. By connecting multiple vacuum double pipes through a common evacuation passage, the system allows simultaneous evacuation of all connected pipes through one vacuum pump, dramatically improving evacuation efficiency while maintaining reliable vacuum conditions in each pipe.
Solution Approach 2:
The evacuation passage is designed with multi-functionality, serving both as a vacuum maintenance channel for individual pipes and as a shared evacuation route for multiple pipes. This universal design enables the same structural component to fulfill different functions: maintaining vacuum in each pipe segment while also providing a common pathway for efficient bulk evacuation across the entire system.
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 enhances thermal insulation and reduces the labor required to evacuate multiple vacuum double pipes by allowing simultaneous evacuation through a shared joint, improving efficiency and reducing thermal stress.
Implementation Method 1
a vacuum passage between the inner pipe and the outer pipe; by evacuating the airtight space between the inner pipe and the outer pipe into a vacuum
Implementation Method 2
thermal conduction occurs between the inner pipe and the outer pipe via the flanges, and therefore a thermal insulation property between the inner pipe and the outer pipe deteriorates
Data Source
AI summary
The connected structure includes a plurality of vacuum double pipes and a joint connecting the plurality of vacuum double pipes. Each vacuum double pipe includes an inner pipe and an outer pipe, and a vacuum passage is formed between the inner pipe and the outer pipe. The vacuum passage is open at both ends in an extension direction of the inner pipe and sealed between the both ends. The joint includes an inner pipe joint portion having inner pipe connectors and an outer pipe joint portion having outer pipe connectors. The joint evacuation passage connects the vacuum passages and is sealed between the outer pipe connectors.