CN201344890Y - Liquid surface tension coefficient measuring apparatus for teaching - Google Patents
Liquid surface tension coefficient measuring apparatus for teaching Download PDFInfo
- Publication number
- CN201344890Y CN201344890Y CNU2008202118205U CN200820211820U CN201344890Y CN 201344890 Y CN201344890 Y CN 201344890Y CN U2008202118205 U CNU2008202118205 U CN U2008202118205U CN 200820211820 U CN200820211820 U CN 200820211820U CN 201344890 Y CN201344890 Y CN 201344890Y
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- China
- Prior art keywords
- surface tension
- frame
- teaching
- liquid surface
- upper chamber
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Abstract
The utility model discloses a liquid surface tension coefficient measuring apparatus for teaching, which belongs to a measuring instrument. A back cavity and an upper cavity are respectively arranged on the back part and the upper part of the front side of a machine frame; a power supply is arranged in the back cavity; the upper cavity is formed by a transparent glass plate and a transparent glass slide door in a sealed covering mode; the transparent glass plate is assembled on the front side part of the machine frame; the transparent glass slide door is arranged on the two side parts; a micro tension pickup, a hoisting ring, a culture dish and a bedplate are orderly arranged in the upper cavity from top to bottom; a display instrument is arranged on the front wall surface of the back cavity, and is positioned in the upper cavity; a screw lifting regulating assembly is arranged on the machine frame outside the lower side of the upper cavity; the upper end of the screw lifting regulating assembly is connected with the bedplate; and a leveling assembly is arranged on the bottom of the machine frame. The utility model has the advantages of airflow interference resistance, convenient operation, easy observation, high measuring precision and low error, and can be widely used for experimental teaching and scientific research of physics, chemistry and the like.
Description
Technical field
The utility model belongs to the physical property detecting instrument, relates generally to a kind of measuring equipment of liquid surface tension coefficient.
Background technology
It is one of weight characteristics of liquid that liquid has surface tension.The surface tension coefficient of measuring liquid has several different methods, and the method for pulling is one of common method.This method is the power that needs when the testing liquid surface breaks away from by the metal suspension ring of measuring a known circumferential length, can think that breakaway force is that surface tension coefficient is multiplied by the girth that breaks away from the surface, i.e. F=α π (D
1+ D
2), F is a breakaway force in the formula, D
1, D
2Be respectively the external diameter and the internal diameter of annulus, α is the surface tension coefficient of liquid.
The tension force of measuring liquid surface with the method that pulls needs that a kind of range ability is less, highly sensitive, the dynamometry instrument of good stability, but the current experiments instrument all is the split open architecture, the instrument that has also needs to assemble voluntarily adjustment, and there is not accurate in locating, be subject to ambient windstream and temperature disturbance, lack temperature measuring equipment, measuring error is big, uses operation and observes inconvenience.
Summary of the invention
The purpose of this utility model is exactly the problem that exists at above-mentioned prior art, provides a kind of compact conformation, measuring accuracy height, good reproducibility, experimental principle to express teaching clear, easy to use liquid surface tension coefficient measuring instrument.
Basic design of the present utility model is, teaching comprises micro-tension sensor, suspension ring, double dish, platen, spiral lifting adjusting assembly, power supply, Displaying Meter with the liquid surface tension coefficient measuring instrument, rear portion and top, front side in frame are provided with rear chamber and upper chamber respectively, and power configuration is in rear chamber; Upper chamber constitutes by being fitted in transparency glass plate on the frame front side portion and the airtight containing of clear glass sliding gate on the both sides, micro-tension sensor, suspension ring, double dish, platen are configured in the upper chamber from top to bottom successively, Displaying Meter is installed on rear chamber's front side wall, is positioned at upper chamber; Spiral lifting is regulated assembly and is configured on the outside frame of upper chamber's downside, and its upper end is connected with platen; Equipped leveling assembly on the frame bottom.Equipped level meter on the frame upper end.Install temperature meter base on upper chamber's upper wall, the thermometer inserting is on temperature meter base, and the thermometer lower end part is in double dish.
The utility model partly shows that with circuit and instrument partly design is airtight in a general frame with the surveying work of instrument, reduced set-up procedure, easy to operate, anti-interference in air flow, the measurement result numeral is easy to observe, and is provided with the device that measures the temperature of a liquid, and measuring error is little, precision is high, it is clear, directly perceived that experimental principle is expressed, and can be widely used in experimental teaching and scientific researches such as physics, chemistry.
Description of drawings
Fig. 1 is a teaching liquid surface tension coefficient measuring instrument overall arrangement structural representation;
Fig. 2 is the dextrad view of Fig. 1.
Piece number explanation among the figure:
1, frame, 2, spiral lifting are regulated assembly, 3, leveling assembly, 4, power supply, 5, Displaying Meter, 6, rear chamber, 7, upper chamber, 8, thermometer, 9, temperature meter base, 10, level meter, 11, clear glass sliding gate, 12, suspension ring, 13, double dish, 14, platen, 15, transparency glass plate, 16, micro-tension sensor.
Embodiment
Below in conjunction with accompanying drawing the utility model optimum implementation is described in detail.Teaching comprises micro-tension sensor 16, suspension ring 12, double dish 13, platen 14, spiral lifting adjusting assembly 2, power supply 4, Displaying Meter 5 with the liquid surface tension coefficient measuring instrument, rear portion and top, front side in frame 1 are provided with rear chamber 6 and upper chamber 7 respectively, and power supply 4 is configured in the rear chamber 6; Upper chamber 7 is made of the transparency glass plate 15 and the 11 airtight containings of the clear glass sliding gate on the both sides that are fitted on frame 1 front side portion, micro-tension sensor 16, suspension ring 12, double dish 13, platen 14 are configured in the upper chamber 7 from top to bottom successively, Displaying Meter 5 is installed on rear chamber's 6 front side walls, is positioned at upper chamber 7; Spiral lifting is regulated assembly 2 and is configured on the outside frame 1 of upper chamber's 7 downsides, and its upper end is connected with platen 14; Equipped leveling assembly 3 on frame 1 bottom.Equipped level meter 10 on frame 1 upper end.Install temperature meter base 9 on upper chamber's 7 upper walls, thermometer 8 insertings are on temperature meter base 9, and thermometer 8 lower end parts are in double dish 13.Electric wire is communicated with power supply 4, the Displaying Meter 5 in micro-tension sensor 16 and the rear chamber 6.
When measuring the surface tension coefficient of liquid, first energized 4 start preheatings 15 minutes, level meter 10 reveal competences that leveling assembly 3 makes the instrument top are adjusted on the surface of cleaning suspension ring 12, double dish 13 simultaneously.Open clear glass sliding gate 11, scale pan is hung on the micro-tension sensor 16, instrument is returned to zero.Counterweight is added the reading that scale pan writes down Displaying Meter 5 simultaneously one by one, calculate the sensitivity B (mv/g) of micro-tension sensor 16.Adjust spiral lifting and regulate assembly 2, platen 14 is reduced, take off scale pan and change suspension ring 12, and the double dish 13 that will fill fluid to be measured places on the platen 14, closes clear glass sliding gate 11, and thermometer 8 is inserted in the fluids to be measured by temperature meter base 9, and then platen 14 is reduced, liquid level descends, and 12 times circumference of suspension ring break away from liquid level gradually, and record suspension ring 12 break away from the maximum indicating value U before the liquid level
1Indicating value U with moment behind the disengaging liquid level
2And the temperature of liquid.By formula F=(U
1-U
2) * g/B, try to achieve the surface tension of fluid to be measured, again by α=F/ π (D
1-D
2) surface tension coefficient of fluid to be measured when calculating this temperature.
Claims (3)
1, a kind of teaching liquid surface tension coefficient measuring instrument, comprise micro-tension sensor (16), suspension ring (12), double dish (13), platen (14), spiral lifting adjusting assembly (2), power supply (4), Displaying Meter (5), it is characterized in that on the rear portion and the top, front side of frame (1) rear chamber (6) and upper chamber (7) being set respectively, power supply (4) is configured in the rear chamber (6); Upper chamber (7) is made of the transparency glass plate (15) and the airtight containing of the clear glass sliding gate (11) on the both sides that are fitted on frame (1) front side portion, micro-tension sensor (16), suspension ring (12), double dish (13), platen (14) are configured in the upper chamber (7) from top to bottom successively, Displaying Meter (5) is installed on rear chamber (6) the front side wall, is positioned at upper chamber (7); Spiral lifting is regulated assembly (2) and is configured on the outside frame of upper chamber (7) downside (1), and its upper end is connected with platen (14); Equipped leveling assembly (3) on frame (1) bottom.
2, teaching according to claim 1 liquid surface tension coefficient measuring instrument is characterized in that equipped level meter (10) on frame (1) upper end.
3, teaching according to claim 1 liquid surface tension coefficient measuring instrument, it is characterized in that on upper chamber (7) upper wall, installing temperature meter base (9), thermometer (8) inserting is on temperature meter base (9), and thermometer (8) lower end part is in double dish (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202118205U CN201344890Y (en) | 2008-12-26 | 2008-12-26 | Liquid surface tension coefficient measuring apparatus for teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202118205U CN201344890Y (en) | 2008-12-26 | 2008-12-26 | Liquid surface tension coefficient measuring apparatus for teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201344890Y true CN201344890Y (en) | 2009-11-11 |
Family
ID=41276472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202118205U Expired - Fee Related CN201344890Y (en) | 2008-12-26 | 2008-12-26 | Liquid surface tension coefficient measuring apparatus for teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201344890Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949809A (en) * | 2010-08-09 | 2011-01-19 | 西华师范大学 | Liquid surface tension coefficient metering instrument |
| CN104390889A (en) * | 2014-12-01 | 2015-03-04 | 四川大学 | Method for measuring liquid surface tension by using transparent glass tube with scale marks |
| CN113376059A (en) * | 2021-05-11 | 2021-09-10 | 南京航空航天大学 | STM32 singlechip intelligent control-based liquid surface tension meter and use method thereof |
-
2008
- 2008-12-26 CN CNU2008202118205U patent/CN201344890Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949809A (en) * | 2010-08-09 | 2011-01-19 | 西华师范大学 | Liquid surface tension coefficient metering instrument |
| CN104390889A (en) * | 2014-12-01 | 2015-03-04 | 四川大学 | Method for measuring liquid surface tension by using transparent glass tube with scale marks |
| CN104390889B (en) * | 2014-12-01 | 2016-09-28 | 四川大学 | Transparent glass tube with a scale measures the method for surface tension of liquid |
| CN113376059A (en) * | 2021-05-11 | 2021-09-10 | 南京航空航天大学 | STM32 singlechip intelligent control-based liquid surface tension meter and use method thereof |
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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: 20091111 Termination date: 20111226 |