CN203164080U - Capillary micro-channel densimeter based on molecular surface tension of liquid - Google Patents
Capillary micro-channel densimeter based on molecular surface tension of liquid Download PDFInfo
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- CN203164080U CN203164080U CN 201320125406 CN201320125406U CN203164080U CN 203164080 U CN203164080 U CN 203164080U CN 201320125406 CN201320125406 CN 201320125406 CN 201320125406 U CN201320125406 U CN 201320125406U CN 203164080 U CN203164080 U CN 203164080U
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Abstract
The utility model discloses a capillary micro-channel densimeter based on molecular surface tension of liquid and relates to a densimeter, which is provided with a solution tank. The capillary micro-channel densimeter is characterized in that a scale plate is vertically arranged inside the solution tank; a fixing sleeve is arranged at the upper part of the scale plate; a transparent capillary tube of which the inner diameter is 0.2-2mm is arranged inside the fixing sleeve and can slid up and down; and the density of the liquid to be tested can be obtained from a formula according to the inner diameter of the capillary tube and net increase height combined with surface tension of the liquid. The capillary micro-channel densimeter is simple in structure, simple in using method, high in measurement accuracy, short in time consumption, and high in efficiency.
Description
Technical field
The utility model belongs to a kind of micro-tunnel density meter, says it is a kind of simple in structure in detail, and using method is simple, the measuring accuracy height, weak point consuming time, efficient high based on the capillary kapillary micro-tunnel density of fluid molecule meter.
Background technology
Density is one of inherent characteristic parameter of liquid, i.e. the quality of contained liquid in the per unit volume, and its unit is kilograms per cubic meter or gram/cubic centimetre, the measurement of fluid density has great significance in metering, scientific research and commercial production.Present industrial widespread use densitometer or experimental method are measured fluid density.Densitometer is the instrumentation of measuring fluid density, and it is the equilibrium principle that suspends according to object.Greater than measuring with different densitometers with the liquid less than water, the scope of measurement is smaller (probably in 0.7 ~ 2.0g/cm^3 scope) also for density.And measure density of liquid with experimental method, though precision can have certain guarantee, operate more loaded down with trivial details, length consuming time, efficient is low, therefore, can not be in the laboratory etc. the local requirement that realizes quick density measurement.
Summary of the invention
The purpose of this utility model is to solve above-mentioned the deficiencies in the prior art, provides a kind of simple in structure, and using method is simple, the measuring accuracy height, weak point consuming time, efficient high based on the capillary kapillary micro-tunnel density of fluid molecule meter.
The technical scheme that the above-mentioned the deficiencies in the prior art that solve the utility model adopt is:
A kind of based on the capillary kapillary micro-tunnel density of fluid molecule meter, be provided with solution tank, it is characterized in that being provided with in the solution tank and vertically be provided with scaleplate, scaleplate top is provided with fixed cover, can slide up and down in the fixed cover to be provided with the transparent capillary that internal diameter is 0.2-2mm.
Scaleplate top described in the utility model is provided with the fixed cover of at least two different inner diameters.
Scaleplate top described in the utility model is provided with four fixed covers, can slide up and down in the fixed cover to be respectively equipped with the transparent capillary that internal diameter is 1.0mm, 0.8mm, 0.5mm, 0.3mm.
Solution tank described in the utility model is the container of being made by transparent material.
Kapillary described in the utility model and fixed cover are made by glass.
Principle of the present utility model is: after kapillary is inserted liquid, liquid in the kapillary can rise under capillary effect, after the liquid level rising reached certain height, the surface tension in the gravity of fluid column and the kapillary on the liquid level balanced each other, and liquid level stops to rise immediately.According to Young's equation, this moment, the relation of each physical quantity was as follows:
Wherein
Be surface tension of liquid, r is capillary radius, and h is the height that liquid rises in kapillary,
Be density of liquid, g is acceleration of gravity.The contact angle of water and most organic liquid and glass is
Degree, the contact angle of water and most organic liquid and glass are 0 degree, so have
With its conversion, for
During use, testing sample is dropped in the solution tank, kapillary is passed fixed cover, to lower slider, fixed cover plays firm kapillary, guarantees the function that it is vertical.The kapillary upper end is communicated with atmosphere, and the kapillary lower end is inserted in the testing liquid and with the solution tank bottom and contacted; The liquid level of testing sample and the liquid-column height in the kapillary can be read out by the scale mark on the scaleplate, obtain the clean lifting height of liquid in kapillary, by formula
(
Be fluid density, y is surface tension of liquid, and g is acceleration of gravity, and h is the clean lifting height of liquid, and R is capillary inner diameter) can obtain the density of testing liquid according to capillary inner diameter and clean lifting height in conjunction with the surface tension of liquid.
The utility model is simple in structure, using method is simple, the measuring accuracy height, weak point consuming time, the efficient height, can determine employed internal diameter size capillaceous according to different measuring accuracy demands, can avoid the unnecessary wasting of resources. the sample that is fit to measure comprises aqueous solution and most of organic solution, especially is fit to low viscous liquid.Also can obtain than accurate data when measuring high-volatile liquid.It is also safer to measure toxic liquid, because amount of samples seldom.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
As shown in the figure based on the capillary kapillary micro-tunnel density of fluid molecule meter, be provided with solution tank, it is characterized in that being provided with in the solution tank and vertically be provided with scaleplate, scaleplate top is provided with fixed cover, can slide up and down in the fixed cover to be provided with the transparent capillary that internal diameter is 0.2-2mm.As can be seen from the figure, scaleplate top is provided with the fixed cover of four different inner diameters, can slide up and down in the fixed cover to be respectively equipped with the transparent capillary that internal diameter is 1.0mm, 0.8mm, 0.5mm, 0.3mm.Solution tank is the container of being made by transparent material, and kapillary and fixed cover are made by glass.During use, testing sample is dropped in the solution tank, kapillary is passed fixed cover, to lower slider, fixed cover plays firm kapillary, guarantees the function that it is vertical.The kapillary upper end is communicated with atmosphere, and the kapillary lower end is inserted in the testing liquid and with the solution tank bottom and contacted; The liquid level of testing sample and the liquid-column height in the kapillary can be read out by the scale mark on the scaleplate, obtain the clean lifting height of liquid in kapillary, by formula
(
Be fluid density, y is surface tension of liquid, and g is acceleration of gravity, and h is the clean lifting height of liquid, and R is capillary inner diameter) can obtain the density of testing liquid according to capillary inner diameter and clean lifting height in conjunction with the surface tension of liquid.
The utility model is simple in structure, using method is simple, the measuring accuracy height, weak point consuming time, the efficient height, can determine employed internal diameter size capillaceous according to different measuring accuracy demands, can avoid the unnecessary wasting of resources. the sample that is fit to measure comprises aqueous solution and most of organic solution, especially is fit to low viscous liquid.Also can obtain than accurate data when measuring high-volatile liquid.It is also safer to measure toxic liquid, because amount of samples seldom.
As shown in the figure, four kapillary arranged side by side one ends communicate with atmosphere, all link to each other with scaleplate by fixed cover, and because its disposable reason kapillary and its stationary installation are not to be completely fixed together, in order to change; The other end capillaceous touches the base plate of solution tank; Liquid-column height in liquid level and the kapillary can be read out the clean lifting height that obtains in the kapillary by scaleplate, by formula
(
Be fluid density, y is surface tension of liquid, and g is acceleration of gravity, and h is the clean lifting height of liquid, and R is capillary inner diameter) can obtain the density of testing liquid according to capillary inner diameter and clean lifting height in conjunction with the surface tension of liquid.
Density is one of inherent characteristic parameter of liquid, the height that the liquid of different densities rises in the kapillary of same inner diameter also is different, therefore can measure density of liquid according to the lifting height of liquid in kapillary, realize by highly to the conversion of density.
Behind kapillary insertion liquid, the liquid in the kapillary can rise under capillary effect, and after the liquid level rising reached certain height, the surface tension in the gravity of fluid column and the kapillary on the liquid level balanced each other, and liquid level stops to rise immediately.According to Young's equation, this moment, the relation of each physical quantity was as follows:
Wherein
Be surface tension of liquid, r is capillary radius, and h is the height that liquid rises in kapillary,
Be density of liquid, g is acceleration of gravity.The contact angle of water and most organic liquid and glass is
Degree, the contact angle of water and most organic liquid and glass are 0 degree, so have
With its conversion, for
Concrete measuring process is as follows:
1) solution example to be measured is fed in the solution tank, add solution to be measured by glue head dropper, utilize scaleplate to read liquid level.
2) after sample is introduced and to be finished, insert the kapillary of relevant internal diameter in the kapillary fixed cover, make the kapillary bottom touch the base plate of solution tank, and inner air tube is got rid of, treat to utilize when liquid in pipe is highly stable scaleplate to read liquid-column height.
3) obtain clean lifting height, and by calculating the density of testing liquid.
But the utility model is not limited to this a kind of measuring method.
(1) scale with scaleplate moves up a little, adds solution to be measured to minimum scale place by glue head dropper, as long as read the corresponding scale of liquid-column height this moment.
(2) also can utilize the double capillary method to measure. in the process that the use single capillary is measured, the position of liquid level is difficult to measure accurately, uses the double capillary method to address this problem well.Two different kapillaries of internal diameter are inserted in the testing liquid, and the height that liquid rises in two kapillaries is different, can obtain:
R1 wherein, R2, h1, h2 be the height of liquid level in the radius of corresponding two capillaries and the kapillary respectively, and △ h is the difference in height of liquid level in two capillaries.This difference in height can be measured more convenient and exactly.Can obtain density as calculated through after the conversion.
The micro-channel device that is used for fluid density mensuration that the utility model provides has following advantage:
1. the testing sample consumption is less, is generally 4-5ml.
2. working sample speed is exceedingly fast, and is general consuming time less than 1 minute, and can obtain many group panel datas.
3. it is simple to add the merit technology, is easy to produce in batches.
Claims (5)
1. one kind based on the capillary kapillary micro-tunnel density of fluid molecule meter, be provided with solution tank, it is characterized in that being provided with in the solution tank and vertically be provided with scaleplate, scaleplate top is provided with fixed cover, can slide up and down in the fixed cover to be provided with the transparent capillary that internal diameter is 0.2-2mm.
2. according to claim 1 based on the capillary kapillary micro-tunnel density of fluid molecule meter, it is characterized in that described scaleplate top is provided with the fixed cover of at least two different inner diameters.
3. according to claim 1 based on the capillary kapillary micro-tunnel density of fluid molecule meter, it is characterized in that described scaleplate top is provided with four fixed covers, can slide up and down in the fixed cover is respectively equipped with the transparent capillary that internal diameter is 1.0mm, 0.8mm, 0.5mm, 0.3mm.
4. according to claim 1 or 2 or 3 described based on the capillary kapillary micro-tunnel density of fluid molecule meter, it is characterized in that described solution tank is the container of being made by transparent material.
5. according to claim 4 based on the capillary kapillary micro-tunnel density of fluid molecule meter, it is characterized in that described kapillary and fixed cover made by glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320125406 CN203164080U (en) | 2013-03-20 | 2013-03-20 | Capillary micro-channel densimeter based on molecular surface tension of liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320125406 CN203164080U (en) | 2013-03-20 | 2013-03-20 | Capillary micro-channel densimeter based on molecular surface tension of liquid |
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| Publication Number | Publication Date |
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| CN203164080U true CN203164080U (en) | 2013-08-28 |
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| CN 201320125406 Expired - Fee Related CN203164080U (en) | 2013-03-20 | 2013-03-20 | Capillary micro-channel densimeter based on molecular surface tension of liquid |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103533111A (en) * | 2013-09-25 | 2014-01-22 | 昆山鑫宏达电子科技有限公司 | Cover plate for touch screen of mobile phone |
| CN111439802A (en) * | 2020-04-30 | 2020-07-24 | 浙江浙能技术研究院有限公司 | Capillary array water supply photo-thermal interface evaporation structure and method |
| CN112945805A (en) * | 2021-01-28 | 2021-06-11 | 哈尔滨工程大学 | Microstructure fiber grating series connection device and liquid density measurement method |
-
2013
- 2013-03-20 CN CN 201320125406 patent/CN203164080U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103533111A (en) * | 2013-09-25 | 2014-01-22 | 昆山鑫宏达电子科技有限公司 | Cover plate for touch screen of mobile phone |
| CN111439802A (en) * | 2020-04-30 | 2020-07-24 | 浙江浙能技术研究院有限公司 | Capillary array water supply photo-thermal interface evaporation structure and method |
| CN112945805A (en) * | 2021-01-28 | 2021-06-11 | 哈尔滨工程大学 | Microstructure fiber grating series connection device and liquid density measurement method |
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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: 20130828 Termination date: 20140320 |