Double-Pipe Joint Integrating Inner and Outer Connections
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Solution Overview
Problem
Existing double-pipe joints are inefficient in compactly connecting and sealing inner and outer pipes, leading to increased costs and larger diameters due to separate configurations of inner and outer pipe joints, which do not interfere with each other, and require additional support structures.
Innovation Solution
A double-pipe joint design where the inner and outer joint portions are integrated, with the outer-pipe joint serving as a protection pipe, using a cylindrical sleeve and union nut configuration to achieve a compact, liquid-tight seal through multiple sealing portions, reducing the number of components and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate inner-pipe joint and outer-pipe joint configurations are used, then reliability of connection is improved, but device complexity and diameter are increased
Solution Approach 1:
The patent combines the inner-pipe joint and outer-pipe joint into a single integrated joint body. The inner-pipe joint portion and outer-pipe joint portion are merged into one component, eliminating the need for separate joint structures. This integration maintains connection reliability while significantly reducing device complexity and overall diameter.
Solution Approach 2:
The integrated joint body serves multiple functions simultaneously: it connects the inner pipe, connects the outer pipe, and provides structural support. The single joint body performs the roles of both inner-pipe joint and outer-pipe joint, achieving multi-functionality that reduces complexity while maintaining reliability.
2Reliability
If separate inner-pipe joint and outer-pipe joint structures are used, then connection reliability is improved, but manufacturing cost is increased
Solution Approach 1:
By merging two separate joint components into one integrated joint body, the patent reduces the number of parts that need to be manufactured, assembled, and inventoried. This consolidation simplifies the manufacturing process, reduces material costs, and lowers assembly costs while maintaining the reliability benefits of having both inner and outer pipe connections.
3Reliability
If additional support structures are used to hold inner-pipe joint position, then connection reliability is improved, but device complexity and diameter are increased
Solution Approach 1:
The integrated joint body inherently provides positional support for the inner-pipe joint through its unified structure. The outer-pipe joint portion of the integrated body serves as the support structure, eliminating the need for additional separate support components. This reduces device complexity while maintaining joint position stability.
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 integrated design provides a compact, cost-effective, and reliable connection that maintains a liquid-tight seal without the need for additional support structures, enhancing the sealing properties and ease of assembly while supporting the inner and outer pipes in a predetermined positional relationship.
Implementation Method 1
an inner-pipe sealing portion which is formed by pressing the inner-pipe end portion from an outer side by fastening due to screw advancement of the inner-pipe union nut toward the inner-pipe receiving port
Implementation Method 2
a press-insertion portion onto which the end portion of the inner pipe is to be pressingly inserted to increase a diameter of the end portion, thereby expanding the end portion
Data Source
AI summary
A double-pipe joint for connecting and coupling a double pipe consisting of outer and inner pipes made of a fluororesin tube. An inner joint portion for coupling the inner pipe is formed by: a sleeve which is to be pressingly fitted into an inner-pipe end portion; an inner-pipe joint body which is to be fitted onto the end portion; and an inner-pipe union nut. An outer joint portion for coupling the outer pipe is formed by: a sleeve which is to be pressingly fitted into an outer-pipe end portion; an outer-pipe joint body which is to be fitted onto the end portion; and an outer-pipe union nut. The inner-pipe union nut and the outer-pipe joint body are formed integrally into a nut-equipped body.