Plug Structure for External Thread Containers with Bubble-Free Circulation
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Solution Overview
Problem
Conventional plug structures for containers with external threads cannot be used, and they often cause fluid pooling and bubble formation during fluid circulation, which is undesirable for accurate flow rate measurement and quality control in chemical products.
Innovation Solution
A plug structure with a fluid circulation path that directs returned fluid along the outer wall of the siphon hose, incorporating a gas supply duct as part of the circulation path, and featuring a sloped inlet and fluid guide/retaining portions to prevent pooling and bubble formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional plug with internal threads is used, then the plug can be attached to containers with internal threads, but it cannot be used in containers with external threads
Solution Approach 1:
The plug inverts the traditional attachment mechanism by providing external threads on its outer surface instead of internal threads. This allows the plug to be threaded onto containers with external threads, effectively reversing the conventional approach and enabling compatibility with a different container type without increasing overall system complexity
2Ease of operation
If gas holes are provided in the side surface of the plug, then gas can be supplied to the container, but fluid pooling occurs easily
Solution Approach 1:
The plug applies local quality by providing gas holes specifically at the bottom surface rather than the side surface. This localized positioning allows gas to be supplied effectively while preventing fluid from pooling in the gas holes, as the bottom location ensures gas rises through the fluid without creating pooling conditions that would occur with side-mounted holes
3Productivity
If the fluid removal path and fluid return path are linked at the outside of the socket, then fluid can be circulated, but bubbles are produced on the fluid surface
Solution Approach 1:
The invention introduces an intermediary structure (the fluid circulation path through the plug body) that mediates between the fluid removal path and fluid return path. By routing the fluid return path through the plug body rather than linking paths externally, the intermediary structure allows fluid to return to the container without creating bubbles on the surface, while still enabling effective fluid circulation
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
Enables bubble-free fluid circulation in containers with external threads, ensuring accurate flow measurement and quality control by preventing fluid from falling freely and guiding it smoothly back to the surface.
Implementation Method 1
the fluid is fed to the outside of the container by gas pressure that is produced by introducing a gas, such as air, into the container
Implementation Method 2
the inlet of the gas supply duct has a sloped wall that slopes downward from the outer periphery toward the inner periphery
Data Source
AI summary
A plug structure is provided that can be installed on a container in which the thread of a container inlet for installing a cap is an outer thread, and furthermore, bubbles are not produced at the fluid surface inside the container even during fluid circulation. In a plug structure that is used in a container in which the thread of the container inlet for attaching the cap is an external thread, that is installed on the container inlet, that is capable of removing a fluid inside the container by using the siphon hose method, and that is capable of circulating the fluid that is inside the container, a fluid circulation path is provided that causes a fluid that is returning into the container during fluid circulation to fall along an external wall of a siphon hose during fluid removal.