Threaded Test Barrel Sealing Against Liquid Sputter Contamination
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Solution Overview
Problem
Existing test barrels suffer from liquid contamination due to shaking, leading to inaccurate test results and poor operability, and have structural issues that affect their usability.
Innovation Solution
A test barrel design featuring a liquid blocking washer with a radial width greater than the barrel opening, threaded rings on the lid and body, a screwing force applying portion, and anti-slip gripping, along with a cylindrical shape and oblique bands to prevent shaking and improve sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the barrel lid and barrel body are engaged via threaded connection, then the structure is simple and easy to manufacture, but test liquid sputters into the connection gap during shaking causing contamination
Solution Approach 1:
A sealing ring is introduced as an intermediary component between the barrel lid and barrel body. The sealing ring fits into a sealing groove and prevents test liquid from entering the threaded connection gap, thereby eliminating contamination while maintaining the simple threaded engagement structure.
Solution Approach 2:
The sealing ring is made of flexible elastic material that can deform to fit the sealing groove perfectly. This flexible sealing structure adapts to the connection interface and effectively blocks test liquid from penetrating into the thread engagement area during shaking.
2Device complexity
If bands are provided on only one side face of the barrel lid, then the structure is simple, but operability during screwing-off is poor due to uneven force distribution
Solution Approach 1:
Bands are selectively provided on both side faces of the barrel lid at the force bearing portion, creating localized grip areas. This asymmetric distribution of bands on opposite faces allows users to apply screwing force from either side, improving operability while maintaining structural simplicity.
3Reliability
If the radial width of the liquid blocking washer is greater than the thickness of the opening, then liquid leakage is prevented, but the device complexity increases
Solution Approach 1:
The liquid blocking function is merged with the sealing ring that is already part of the threaded connection structure. The sealing ring serves dual purposes: sealing the thread gap and blocking liquid from entering the connection area, thereby preventing leakage without adding separate complex components.
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
Prevents liquid sputtering, enhances measurement accuracy, and improves operability by reducing friction and preventing over-engagement, while extending the device's service life.
Implementation Method 1
a liquid blocking washer is arranged between the barrel lid and the barrel body, wherein a radial width of the liquid blocking washer is greater than a thickness of the opening of the barrel body
Implementation Method 2
The liquid blocking washer may be made from an elastic rubber or similar elastic material
Data Source
AI summary
Disclosed is a test barrel, to prevent a test liquid in the barrel from sputtering into a connection gap due to shaking of the barrel to hence cause contamination, improve the measurement accuracy in case of multiple tests, and meanwhile improve the operability of screwing on and screwing off the entire device during use of the device. The above technical objective of this utility model is implemented by employing the following technical solution: a test barrel, comprising barrel lid and a barrel body; wherein the threaded rings are arranged on an inner wall of a side face of the barrel lid and an outer wall of an opening of the barrel body, a rotary force applying portion is arranged on an outer wall of the side face of the barrel lid, and during engagement, a liquid blocking washer is arranged between the barrel lid and the barrel body, wherein a radial width of the liquid blocking washer is greater than a thickness of the opening of the barrel body.