CN216955612U - High-precision liquid surface tension coefficient measuring instrument - Google Patents
High-precision liquid surface tension coefficient measuring instrument Download PDFInfo
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- CN216955612U CN216955612U CN202220002210.4U CN202220002210U CN216955612U CN 216955612 U CN216955612 U CN 216955612U CN 202220002210 U CN202220002210 U CN 202220002210U CN 216955612 U CN216955612 U CN 216955612U
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- electronic balance
- metal frame
- liquid
- surface tension
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- 239000007788 liquid Substances 0.000 title claims abstract description 41
- 239000002184 metal Substances 0.000 claims abstract description 28
- 230000001133 acceleration Effects 0.000 abstract description 3
- 230000005484 gravity Effects 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 12
- 238000005259 measurement Methods 0.000 description 9
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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Abstract
A high-precision liquid surface tension coefficient measuring instrument is mainly applied to experimental teaching in universities and secondary colleges. The electronic balance comprises an electronic balance, an electronic balance support, a connecting rod, a container 1, a container 2, a communicating pipe and a metal frame. The electronic balance is arranged on the electronic balance support and is adjusted horizontally, one edge of the connecting rod is arranged on the measuring disc of the electronic balance, the other opposite edge is hung with the metal frame, the metal frame is immersed in the liquid to be measured in the container 1, and the communicating pipe is communicated with the container 1 and the container 2. The liquid level in the container 1 can be controlled by adjusting the placing height of the container 2. When the liquid level in the container 1 drops, the metal frame is pulled out of the liquid, and the liquid film just breaks, the reading of the electronic balance is recorded. And (4) regulating the height of the liquid film until the upper edge of the metal frame is just above the liquid level, and recording the reading of the lower electronic balance. The width and diameter of the metal frame are measured by a vernier caliper, the local gravity acceleration is determined, and the surface tension coefficient of the liquid can be obtained.
Description
Technical Field
The utility model relates to a high-precision liquid surface tension coefficient measuring instrument, which is mainly applied to experimental teaching in universities and secondary colleges.
Background
Currently, methods for measuring the surface tension coefficient of a liquid include: a pull-off method, a pendant drop method, a maximum bubble pressure method, a capillary method, and the like. The measurement precision of the pendant drop method and the maximum bubble pressure method is low. The capillary method is complex in operation, a high-precision distance measuring instrument is required, and the requirement on the cleanliness of the instrument is high. The partial pull-off method adopts a Jolly's scale, so that the measurement is complicated and the measurement error is large. The partial pull-off method uses a pressure sensor to replace a Jolly scale to measure the pull-off force, and has the problem of low measurement precision.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of complicated measurement and low measurement precision of a pull-off method, the utility model provides the high-precision liquid surface tension coefficient measuring instrument which not only can measure the liquid surface tension coefficient with high precision, but also has simple structure, reasonable design and convenient use.
The technical solution of the utility model is as follows: the electronic balance comprises an electronic balance, an electronic balance support, a connecting rod, a container 1, a container 2, a communicating pipe and a metal frame. The electronic balance is arranged on the electronic balance support and is adjusted horizontally, one edge of the connecting rod is arranged on the measuring disc of the electronic balance, the other opposite edge is hung with the metal frame, the metal frame is immersed in the liquid to be measured in the container 1, and the communicating pipe is communicated with the container 1 and the container 2. The liquid level in the container 1 can be controlled by adjusting the placing height of the container 2. When the liquid level in the vessel 1 drops and the metal frame is removed from the liquid, the electronic balance reading M1 is recorded just after the liquid film has broken. And recording the reading M2 of the electronic balance when the height of the liquid film is adjusted to the position that the upper edge of the metal frame is just above the liquid level. The width L and the diameter d of the metal frame are measured by a vernier caliper, the local gravity acceleration g is determined, and the surface tension coefficient of the liquid can be obtained by using the formula a = (M1-M2) g/(L + d).
The utility model has the advantages that the metal frame is suspended below the electronic balance weighing plate through the connecting rod, the lifting of the liquid level in the container 1 is controlled by adjusting the height of the container 2, when the metal frame is pulled away from the liquid level until the liquid level is broken, the reading of the electronic balance is recorded, when the metal frame is just above the liquid level, the reading of the electronic balance is recorded, and the liquid surface tension coefficient can be obtained according to the reading difference, the width of the metal frame and the diameter of a metal wire of the metal frame. The liquid surface tension coefficient measuring instrument has the advantages that except that the container 2 needs to move up and down, other components are in a stable state, and the accuracy of measured data is guaranteed. The liquid surface tension coefficient measuring instrument solves the problems of complex measurement, large measurement error and low measurement precision of a pull-off method.
Drawings
The utility model is further illustrated with reference to the figures and examples.
FIG. 1 is a schematic diagram of the present invention.
As shown in fig. 1, the present invention includes an electronic balance (1), an electronic balance support (2), a connecting rod (3), a metal frame (4), a container (1) (5), a communicating tube (6), and a container (2) (7). The electronic balance (1) is arranged on the electronic balance support (2) and is adjusted horizontally, one side of the connecting rod (3) is arranged on a measuring disc of the electronic balance (1), the other opposite side is hung with the metal frame (4), the metal frame (4) is immersed in liquid to be measured in the container (1), (5), and the communicating pipe (6) is communicated with the container (1), (5) and the container (2), (7).
Detailed Description
The liquid level in the containers 1 and 5 can be controlled by adjusting the placing heights of the containers 2 and 7. When the liquid level in the container 1(5) drops, the metal frame (4) is removed from the liquid, and the liquid film just breaks, the reading M1 of the electronic balance (1) is recorded. And (4) recording the reading M2 of the lower electronic balance (1) when the height of the liquid film is adjusted to the position that the upper edge of the metal frame (4) is just above the liquid level. The width L and the diameter d of the metal frame (4) are measured by a vernier caliper, the local gravity acceleration g is determined, and the surface tension coefficient of the liquid can be obtained by using the formula a = (M1-M2) g/(L + d).
Claims (2)
1. A high-precision liquid surface tension coefficient measuring instrument is characterized in that: the electronic balance comprises an electronic balance, an electronic balance support, a connecting rod, a container 1, a container 2, a communicating pipe and a metal frame, wherein the electronic balance is arranged on the electronic balance support and is adjusted to be horizontal, one edge of the connecting rod is arranged on a measuring disc of the electronic balance, the metal frame is hung on the other opposite edge of the connecting rod, the metal frame is immersed in liquid to be measured in the container 1, and the communicating pipe is communicated with the container 1 and the container 2.
2. The high accuracy liquid surface tension coefficient measuring instrument as set forth in claim 1, wherein: the metal frame is replaced by a ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220002210.4U CN216955612U (en) | 2022-01-04 | 2022-01-04 | High-precision liquid surface tension coefficient measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220002210.4U CN216955612U (en) | 2022-01-04 | 2022-01-04 | High-precision liquid surface tension coefficient measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216955612U true CN216955612U (en) | 2022-07-12 |
Family
ID=82314796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220002210.4U Active CN216955612U (en) | 2022-01-04 | 2022-01-04 | High-precision liquid surface tension coefficient measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216955612U (en) |
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2022
- 2022-01-04 CN CN202220002210.4U patent/CN216955612U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240207 Address after: 230000 B-2704, wo Yuan Garden, 81 Ganquan Road, Shushan District, Hefei, Anhui. Patentee after: HEFEI LONGZHI ELECTROMECHANICAL TECHNOLOGY Co.,Ltd. Country or region after: China Address before: 412007 No. 88 Taishan Road, Zhuzhou City, Hunan Province Patentee before: HUNAN University OF TECHNOLOGY Country or region before: China |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20240417 Address after: 430000, Room 903, Unit 2, Building 10, Phase II, Longquan Community, Longquan Street, Wuhan Donghu New Technology Development Zone, Wuhan City, Hubei Province Patentee after: Hubei Shouzhong Technology Co.,Ltd. Country or region after: China Address before: 230000 B-2704, wo Yuan Garden, 81 Ganquan Road, Shushan District, Hefei, Anhui. Patentee before: HEFEI LONGZHI ELECTROMECHANICAL TECHNOLOGY Co.,Ltd. Country or region before: China |