CN2729692Y - Capillary tube - Google Patents
Capillary tube Download PDFInfo
- Publication number
- CN2729692Y CN2729692Y CN 200420079200 CN200420079200U CN2729692Y CN 2729692 Y CN2729692 Y CN 2729692Y CN 200420079200 CN200420079200 CN 200420079200 CN 200420079200 U CN200420079200 U CN 200420079200U CN 2729692 Y CN2729692 Y CN 2729692Y
- Authority
- CN
- China
- Prior art keywords
- kapillary
- capillary tube
- bubble
- pressure
- diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a capillary tube. The outlet position of the tube diameter is provided with a bubble shapes hollow cavity which is arranged at the position above 3-12mm above the outlet, and the diameter of the bubble shaped hollow cavity is 2-5 times more than the tube diameter. The capillary tube of the utility model can ensure the measuring result of the experiment, and can accurately read when the balancing pressure is reached in the capillary tube; therefore, the balancing pressure in the capillary tube is easy to be determined.
Description
Technical field
The utility model relates to a kind of kapillary, especially surface tension experiment measuring kapillary.
Background technology
Need kapillary when measuring the surface tension coefficient of liquid with maximum bubble method, caliber is the critical elements that guarantees measuring accuracy in 1.5mm.Its measuring process is as follows: when kapillary end face and testing liquid plane are tangent, liquid level rises along kapillary, kapillary is communicated to a closed container, (drop of liquid increases the air pressure of container under generally by separating funnel) then is bubble after the liquid in the kapillary is discharged from when the pressure of container increases gradually.Equalized pressure in the kapillary when just discharging bubble is one and the proportional amount of liquid surface tension coefficient.Pressure in the kapillary can be measured by the precision pressure instrumentation, then can be by calculating surface tension coefficient, but it is a straight tube that current experiments is measured with kapillary, caliber is thin, and volume is little, during equalized pressure in reaching kapillary, when promptly just having discharged bubble, have a string little rill and discharge, at this moment be difficult for determining the metering of the equalized pressure in the kapillary, can influence the result of experiment measuring.
Summary of the invention
The purpose of this utility model is: a kind of kapillary is provided, can guarantees the result of experiment measuring, can pin-point reading during equalized pressure in reaching kapillary, thus determine equalized pressure in the kapillary easily.
The utility model purpose is achieved in that a kind of kapillary, the outlet position of caliber is provided with an air bubble-shaped cavity, because the volume of bubble is much larger than this section capillary caliber, then when kapillary internal pressure balance, can not be that a string minute bubbles are emerged in succession, and a bigger bubble can occur when pressure equilibrium, pressure ratio at this moment be more definite, energy pin-point reading when promptly reaching the equalized pressure in the kapillary also guarantees to know clearly whole experimental precision.
Description of drawings
Fig. 1 is the prior art structural representation
Fig. 2 is the utility model structural representation
Embodiment
As shown in the figure: kapillary 1, caliber 2, air bubble-shaped cavity 3, as shown in the figure, kapillary 1 usefulness glass is made, and the diameter of caliber 2 is between 0.5-1.3mm, outlet end is provided with air bubble-shaped cavity 3, position on the 3-12mm above the outlet, general air bubble-shaped cavity is roughly circle, and its diameter is 2-5 a times of caliber 2.
Claims (2)
1, a kind of kapillary is characterized in that the outlet position of caliber is provided with an air bubble-shaped cavity.
2, by the described kapillary of claim 1, it is characterized in that the position of air bubble-shaped cavity more than the 3-12mm above the outlet, the air bubble-shaped cavity diameter is 2-5 a times of caliber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420079200 CN2729692Y (en) | 2004-09-06 | 2004-09-06 | Capillary tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420079200 CN2729692Y (en) | 2004-09-06 | 2004-09-06 | Capillary tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2729692Y true CN2729692Y (en) | 2005-09-28 |
Family
ID=35048467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420079200 Expired - Fee Related CN2729692Y (en) | 2004-09-06 | 2004-09-06 | Capillary tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2729692Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110927022A (en) * | 2019-11-20 | 2020-03-27 | 四川大学 | Method for measuring surface tension coefficient of liquid |
-
2004
- 2004-09-06 CN CN 200420079200 patent/CN2729692Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110927022A (en) * | 2019-11-20 | 2020-03-27 | 四川大学 | Method for measuring surface tension coefficient of liquid |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |