CN202453273U - Device for measuring liquid surface tension coefficients - Google Patents
Device for measuring liquid surface tension coefficients Download PDFInfo
- Publication number
- CN202453273U CN202453273U CN2011204599625U CN201120459962U CN202453273U CN 202453273 U CN202453273 U CN 202453273U CN 2011204599625 U CN2011204599625 U CN 2011204599625U CN 201120459962 U CN201120459962 U CN 201120459962U CN 202453273 U CN202453273 U CN 202453273U
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- liquid
- metal frame
- electronic balance
- surface tension
- movable axis
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Abstract
The utility model relates to a device for measuring liquid surface tension coefficients, wherein the device is mainly applied to experimental teaching in large and medium technical schools; the device comprises an electronic balance, a glass container, a metal frame, a liquid film height adjusting and measuring device, a small hook, liquid to be measured, a bracket and a base; the bracket is installed on the base; the liquid film height adjusting and measuring device is installed on the transverse beam of the bracket; the electronic balance is arranged on the base; and the glass container filled with the liquid to be measured is arranged on a weighing disc of the electronic balance. According to the utility mode, the metal frame vertically moves by adjusting the liquid film height adjusting and measuring device; when the upper frame of the metal frame is just at the liquid surface, indication of the electronic balance is read out; when the metal frame is pulled out of the liquid surface from the liquid to be measured till a liquid film is just broken, indication of the electronic balance is read out; liquid surface tension is obtained according to the indication difference; the width L of the metal frame and the diameter of metal wires of the metal frame are measured by using a vernier calliper; and then, the liquid surface tension coefficients are obtained.
Description
Affiliated technical field
The utility model relates to a kind of liquid surface tension coefficient measurement mechanism, 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 measurement mechanism; This liquid surface tension coefficient measurement mechanism 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, glass container, metal frame, liquid film height adjusting measurement mechanism, little hook, testing liquid, support, base.The liquid film height is regulated measurement mechanism and is contained movable axis, spring, differential head, holding screw, overcoat.Support is housed on the base, the liquid film height is housed on the rack beam regulates measurement mechanism, electronic balance places on the base, and the glass container that testing liquid is housed places on the weighing pan of electronic balance.Spring places in the overcoat, and the lower end of spring is stuck in the overcoat through the step in the overcoat, and movable axis passes spring, the upper end that the step of movable axis upper end blocks spring, and the differential head links to each other with overcoat through holding screw, and the movable axis upper end links to each other with the measuring junction of differential head.Little hook is equipped with in the movable axis lower end, hangs with metal frame on the little hook.Regulate the differential head and 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 through movable axis, little hook
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; Little hook is fixed on the movable axis lower end, through regulating the differential head metal frame is moved up and down, when the metal frame upper side frame just is 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, read the electronic balance reading, can obtain surface tension of liquid according to its difference of reading; Measure metal frame width L and metal frame diameter wiry with vernier caliper, can try to achieve liquid surface tension coefficient.This liquid surface tension coefficient measurement mechanism 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.
Fig. 1 is the structural representation of the utility model.
Fig. 2 is the structural representation that the liquid film height is regulated measurement mechanism.
1. electronic balances among the figure, 2. glass container, 3. metal frame, 4. the liquid film height is regulated measurement mechanism, 5. little hook, 6. testing liquid, 7. support, 8. base, 9. movable axis, 10. spring, 11. differential heads, 12. holding screws, 13. overcoats.
Embodiment
Support (7) is housed on the base (8), the liquid film height is housed on support (7) crossbeam regulates measurement mechanism (4), electronic balance (1) places on the base (8), and the glass container (2) that testing liquid (6) are housed places on the weighing pan of electronic balance (1).Spring (10) places in the overcoat (13); The lower end of spring (10) is stuck in the overcoat (13) through the step in the overcoat (13); Movable axis (9) passes spring (10); The step of movable axis (9) upper end blocks the upper end of spring (10), and differential head (11) links to each other with overcoat (13) through holding screw (12), and movable axis (9) upper end links to each other with the measuring junction of differential head (11).Little hook (5) is equipped with in movable axis (9) lower end, hangs with metal frame (3) on the little hook (5).Regulating differential head (11) moves up and down metal frame (3) through movable axis (9), little hook (5).When metal frame (3) upper side frame just is positioned at liquid level, read electronic balance (1) reading W
1, regulate differential head (11) and from testing liquid (6), pull out metal frame (3) when liquid film just breaks, read electronic balance (1) reading W
2, recording surface tension of liquid is F=(W
1-W
2) g, measure metal frame (3) width L with vernier caliper, by
Promptly try to achieve testing liquid (6) surface tension coefficient a, in the formula, g is local acceleration of gravity, and d is metal frame (a 3) diameter wiry.
Claims (1)
1. liquid surface tension coefficient measurement mechanism, it contains electronic balance, glass container, metal frame, liquid film height and regulates measurement mechanism, little hook, testing liquid, support, base, and the liquid film height is regulated measurement mechanism and is contained movable axis, spring, differential head, holding screw, overcoat; Support is housed on the base, the liquid film height is housed on the rack beam regulates measurement mechanism, electronic balance places on the base; The glass container that testing liquid is housed places on the weighing pan of electronic balance; It is characterized in that: spring places in the overcoat, and the lower end of spring is stuck in the overcoat through the step in the overcoat, and movable axis passes spring; The upper end that the step of movable axis upper end blocks spring; The differential head links to each other with overcoat through holding screw, and the movable axis upper end links to each other with the measuring junction of differential head, and little hook is equipped with in the movable axis lower end; Hang with metal frame on the little hook, regulate the differential head and metal frame is moved up and down through movable axis, little hook.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204599625U CN202453273U (en) | 2011-11-18 | 2011-11-18 | Device for measuring liquid surface tension coefficients |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204599625U CN202453273U (en) | 2011-11-18 | 2011-11-18 | Device for measuring liquid surface tension coefficients |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202453273U true CN202453273U (en) | 2012-09-26 |
Family
ID=46869128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204599625U Expired - Fee Related CN202453273U (en) | 2011-11-18 | 2011-11-18 | Device for measuring liquid surface tension coefficients |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202453273U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104677784A (en) * | 2015-03-04 | 2015-06-03 | 苏州创恩机械设备有限公司 | Plate surface oil film measurement device and method adopting same |
| CN114383979A (en) * | 2022-01-21 | 2022-04-22 | 四川大学 | Method for measuring surface tension coefficient of liquid by liquid drop method |
-
2011
- 2011-11-18 CN CN2011204599625U patent/CN202453273U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104677784A (en) * | 2015-03-04 | 2015-06-03 | 苏州创恩机械设备有限公司 | Plate surface oil film measurement device and method adopting same |
| CN114383979A (en) * | 2022-01-21 | 2022-04-22 | 四川大学 | Method for measuring surface tension coefficient of liquid by liquid drop method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120926 Termination date: 20141118 |
|
| EXPY | Termination of patent right or utility model |