CN202305366U - Liquid surface tension coefficient measuring instrument - Google Patents
Liquid surface tension coefficient measuring instrument Download PDFInfo
- Publication number
- CN202305366U CN202305366U CN2011204286048U CN201120428604U CN202305366U CN 202305366 U CN202305366 U CN 202305366U CN 2011204286048 U CN2011204286048 U CN 2011204286048U CN 201120428604 U CN201120428604 U CN 201120428604U CN 202305366 U CN202305366 U CN 202305366U
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- CN
- China
- Prior art keywords
- metal frame
- fixed pulley
- liquid
- electronic balance
- surface tension
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- 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
A liquid surface tension coefficient measuring instrument is mainly applied to universities and colleges as well as secondary technical schools for experimental teaching. The measuring instrument comprises an electronic balance, a bracket, a lifting knob, a string, a fixed pulley 1, a fixed pulley 2, a hooklet, a metal frame and a glass container, wherein the bracket is mounted on the electronic balance; the fixed pulley 1, the fixed pulley 2 and the lifting knob are mounted on the bracket; the glass container with to-be-detected liquid is placed on the weighing plate of the electronic balance; and the metal frame is hung on the hooklet fixed at one end of the string, and the other end of the string is fixed on the lifting knob through the fixed pulley 1 and the fixed pulley 2. According to the measuring instrument provided by the utility model, the metal frame moves up and down through adjusting the lifting knob; when the upper edge frame of the metal frame is positioned right on the liquid level, the electronic balance is read out, and when the metal frame is pulled out from the to-be-detected liquid until the liquid membrane is just fractured, the electronic balance is read out; the liquid surface tension can be obtained according to the reading difference; and the width L of the metal frame and the diameter of the metal wire of the metal frame are measured through a vernier caliper, and the liquid surface tension coefficient is obtained.
Description
Technical field
The utility model relates to a kind of liquid surface tension coefficient measuring instrument, is mainly used in big, the experimental teaching of special secondary school universities and colleges.
Background technology
At present, measure the liquid surface tension coefficient method and pull method, capillary tube technique, sessile drop method, liquid volume method and maximum bubble method etc., the method that wherein pulls adopts Joly balance, measure numerous and diverse, measuring error is big; Sessile drop method, liquid volume method and maximum bubble method measuring accuracy are not high; Though the capillary tube technique ratio of precision is higher, operation is complicated, needs high-precision distance mearuring equipment, and the cleanliness factor of experimental apparatus is had relatively high expectations.
Summary of the invention
Measure the shortcoming numerous and diverse, that measuring error is big in order to overcome the method that pulls.The utility model provides a kind of liquid surface tension coefficient measuring instrument, and this liquid surface tension coefficient measuring instrument can not only accurately measure liquid surface tension coefficient, and simple, convenient.
The utility model solves the technical scheme that its technical matters adopted: it contains electronic balance, support, up-down knob, cord, fixed pulley 1, fixed pulley 2, little hook, metal frame, glass container.Support is housed on the electronic balance; Fixed pulley 1, fixed pulley 2 and up-down knob are housed on the support; The glass container that testing liquid is housed is placed on the scales/electronic balance weighing dish; Metal frame hangs on the little hook, and little hook is fixed on an end of cord, and the other end of cord is fixed on the up-down knob through fixed pulley 1 and fixed pulley 2.Through regulating the up-down knob metal frame is moved up and down, when the metal frame upper side frame just is positioned at liquid level, read electronic balance reading W
1When metal frame is drawn out liquid level to liquid film and just breaks from testing liquid, read electronic balance reading W
2, recording surface tension of liquid is F=(W
1-W
2) g, measure metal frame width L with vernier caliper, by
Can try to achieve liquid surface tension coefficient a, in the formula, g is local acceleration of gravity, and d is a metal frame diameter wiry.
The beneficial effect of the utility model is; The glass container that testing liquid is housed is placed on the scales/electronic balance weighing dish, and metal frame hangs on the little hook, and little hook is fixed on an end of cord; The other end of cord is fixed on the up-down knob through fixed pulley 1 and fixed pulley 2; Through regulating the up-down knob metal frame is moved up and down, when the metal frame upper side frame just is positioned at liquid level, read electronic balance reading W
1, regulate the up-down knob and from testing liquid, pull out metal frame to liquid film when just breaking, read electronic balance reading W
2, recording surface tension of liquid is F=(W
1-W
2) g, measure metal frame width L with vernier caliper, by
Promptly try to achieve liquid surface tension coefficient a, in the formula, g is local acceleration of gravity, and d is a metal frame diameter wiry, has solved the method that pulls and has measured the problem numerous and diverse, that measuring error is big.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Accompanying drawing is the structural representation of the utility model.
1. electronic balances among the figure, 2. support, 3. up-down knob, 4. cord, 5. fixed pulley 1, and 6. fixed pulley 2,7. little hook, 8. metal frame, 9. glass container.
Embodiment
Support (2) is housed on the electronic balance (1); Fixed pulley 1 (5), fixed pulley 2 (6) and up-down knob (3) are housed on the support (2); The glass container (9) that testing liquid is housed is placed on electronic balance (1) weighing pan; Metal frame (8) hangs on the little hook (7), and little hook (7) is fixed on an end of cord (4), and the other end of cord (4) is fixed on the up-down knob (3) through fixed pulley 1 (5) and fixed pulley (6) 2.Through regulating up-down knob (3) metal frame (8) is moved up and down, when metal frame (8) upper side frame just is positioned at liquid level, read electronic balance (1) reading W
1When metal frame (8) is drawn out liquid level to liquid film and just breaks from testing liquid, read electronic balance (1) reading W
2, recording surface tension of liquid is F=(W
1-W
2) g, measure metal frame (8) width L with vernier caliper, by
Promptly try to achieve liquid surface tension coefficient a, in the formula, g is local acceleration of gravity, and d is metal frame (a 8) diameter wiry.。
Claims (2)
1. liquid surface tension coefficient measuring instrument, it contains electronic balance, support, up-down knob, cord, fixed pulley 1, fixed pulley 2, little hook, metal frame, glass container, and support is housed on the electronic balance; Fixed pulley 1, fixed pulley 2 and up-down knob are housed on the support; The glass container that testing liquid is housed is placed on the scales/electronic balance weighing dish, and metal frame hangs on the little hook, and little hook is fixed on an end of cord; The other end of cord is fixed on the up-down knob through fixed pulley 1 and fixed pulley 2; When making the metal frame upper side frame just be positioned at liquid level, read the electronic balance reading, when metal frame is drawn out liquid level to liquid film and just breaks from testing liquid through regulating the up-down knob; Read the electronic balance reading, obtain surface tension of liquid according to its difference of reading.
2. liquid surface tension coefficient measuring instrument according to claim 1 is characterized in that: the glass container that testing liquid is housed is placed on the scales/electronic balance weighing dish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204286048U CN202305366U (en) | 2011-11-03 | 2011-11-03 | Liquid surface tension coefficient measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204286048U CN202305366U (en) | 2011-11-03 | 2011-11-03 | Liquid surface tension coefficient measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202305366U true CN202305366U (en) | 2012-07-04 |
Family
ID=46374238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204286048U Expired - Fee Related CN202305366U (en) | 2011-11-03 | 2011-11-03 | Liquid surface tension coefficient measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202305366U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245593A (en) * | 2013-05-21 | 2013-08-14 | 四川大学 | Small magnetic ball contacting automatic horizontal hanging ring capable of measuring surface tension by pull-apart method |
| CN104217633A (en) * | 2013-05-30 | 2014-12-17 | 李忠相 | Quantitative coulomb law demonstrating scheme |
| CN104406892A (en) * | 2014-12-04 | 2015-03-11 | 上海梭伦信息科技有限公司 | Interface tension and contact angle test device and method based on analytical balance |
| CN106706461A (en) * | 2017-03-09 | 2017-05-24 | 深圳桃源钓具有限公司 | Fishing line water shearing testing device and method thereof |
| CN114739853A (en) * | 2022-04-20 | 2022-07-12 | 重庆大学 | Device for testing capillary capacity of alkali metal heat pipe liquid absorption core |
-
2011
- 2011-11-03 CN CN2011204286048U patent/CN202305366U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245593A (en) * | 2013-05-21 | 2013-08-14 | 四川大学 | Small magnetic ball contacting automatic horizontal hanging ring capable of measuring surface tension by pull-apart method |
| CN104217633A (en) * | 2013-05-30 | 2014-12-17 | 李忠相 | Quantitative coulomb law demonstrating scheme |
| CN104406892A (en) * | 2014-12-04 | 2015-03-11 | 上海梭伦信息科技有限公司 | Interface tension and contact angle test device and method based on analytical balance |
| CN106706461A (en) * | 2017-03-09 | 2017-05-24 | 深圳桃源钓具有限公司 | Fishing line water shearing testing device and method thereof |
| CN106706461B (en) * | 2017-03-09 | 2024-03-26 | 深圳桃源钓具有限公司 | Fishing line water cutting performance testing device and method thereof |
| CN114739853A (en) * | 2022-04-20 | 2022-07-12 | 重庆大学 | Device for testing capillary capacity of alkali metal heat pipe liquid absorption core |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20121103 |