CN217277667U - Pump suction type liquid surface tension coefficient measuring instrument - Google Patents
Pump suction type liquid surface tension coefficient measuring instrument Download PDFInfo
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- CN217277667U CN217277667U CN202220023846.7U CN202220023846U CN217277667U CN 217277667 U CN217277667 U CN 217277667U CN 202220023846 U CN202220023846 U CN 202220023846U CN 217277667 U CN217277667 U CN 217277667U
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- electronic balance
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- metal frame
- water pump
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- 239000007788 liquid Substances 0.000 title claims abstract description 50
- 239000002184 metal Substances 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 description 13
- 238000005259 measurement Methods 0.000 description 8
- 230000001133 acceleration Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Abstract
A pump suction type liquid surface tension coefficient measuring instrument is mainly applied to experiment teaching. The device comprises an electronic balance, an electronic balance support rod, a metal frame with a lifting rope, a communicating vessel and a water pump. The middle of the electronic balance is provided with a hole, the metal frame with the lifting rope penetrates through the hole in the middle of the electronic balance and is suspended below a measuring plate of the electronic balance, the metal frame with the lifting rope is immersed in liquid to be measured at the end A of the communicating vessel, a water suction port of the water pump is immersed in liquid to be measured at the end B of the communicating vessel, a water outlet of the water pump is arranged above the end A of the communicating vessel, and a switch is arranged between the end A of the communicating vessel and the end B of the communicating vessel. And controlling the lifting of the liquid level to be measured by using a water pump and a switch. And opening the switch, lowering the liquid level in the end A of the communicating vessel, and recording the reading of the electronic balance when the liquid film is just broken. And closing the switch, operating the water pump to pump the liquid at the end B of the communicating vessel to the end A of the communicating vessel, adjusting the height of the liquid level, recording the reading of the electronic balance, and solving the surface tension coefficient according to the reading difference, the width and the diameter of the metal frame.
Description
Technical Field
The utility model relates to a pump suction type liquid surface tension coefficient measuring apparatu mainly is applied to big, the experimental teaching of secondary and primary 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. And a part of pull-off methods adopt a Jolly 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 shortcoming that the pulling-off method is complicated to measure, measurement accuracy is low, the utility model provides a pump suction type liquid surface tension coefficient measuring apparatu, this measuring apparatu not only can the high accuracy measure liquid surface tension coefficient, simple structure, reasonable in design, convenient to use moreover.
The technical solution of the utility model is that: the device comprises an electronic balance, an electronic balance support rod, a metal frame with a lifting rope, a communicating vessel and a water pump. The electronic balance is arranged on an electronic balance support rod and is adjusted to be horizontal, a hole is formed in the middle of the electronic balance, a metal frame with a lifting rope penetrates through a hole in the middle of the electronic balance and is suspended below a measuring disc of the electronic balance, the metal frame with the lifting rope is immersed in liquid to be measured at the end A of the communicating device, a water suction port of the water pump is immersed in liquid to be measured at the end B of the communicating device, a water outlet of the water pump is arranged above the end A of the communicating device, and a switch is arranged between the end A of the communicating device and the end B of the communicating device. In the initial state, the liquid level of the liquid to be detected in the end A of the communicating vessel is higher than the liquid level of the end B of the communicating vessel. And opening a switch on the communicating vessel, lowering the liquid level in the end A of the communicating vessel, separating the metal frame from the liquid to be measured, and recording the reading M1 of the electronic balance when the liquid film is just broken. And closing the switch, operating the water pump to pump the liquid at the end B of the communicating vessel to the end A of the communicating vessel, and recording the reading M2 of the electronic balance when the liquid level is adjusted to the state that the upper edge of the metal frame is just positioned on 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 beneficial effects of the utility model are that, trompil in the middle of the electronic balance, the metal frame of taking the lifting rope passes the hole in the middle of the electronic balance and hangs under the electronic balance measuring pan, utilizes switch and the lift of the liquid level that awaits measuring of water pump control on the linker. And opening the switch, lowering the liquid level in the end A of the communicating vessel, separating the metal frame from the liquid to be measured, and recording the reading of the electronic balance when the liquid film is just broken. And closing the switch, operating the water pump to pump the liquid at the end B of the communicating vessel to the end A of the communicating vessel, adjusting the height of the liquid film until the upper edge of the metal frame is just positioned on the liquid level, recording the reading of the electronic balance, and calculating the surface tension coefficient of the liquid according to the difference of the readings, the width of the metal frame and the diameter of the metal wire of the metal frame. The liquid surface tension coefficient measuring instrument is in a stable state in the measuring process, so that the accuracy of measured data is ensured. 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 invention is further described with reference to the following figures and examples.
Fig. 1 is a schematic structural diagram of the present invention.
Shown in figure 1, the utility model comprises an electronic balance (1), an electronic balance support rod (2), a metal frame (3) with a lifting rope, a communicating vessel (4) and a water pump (5). The electronic balance (1) is arranged on the electronic balance support rod (2) and is leveled, a hole is formed in the middle of the electronic balance (1), the metal frame (3) with the lifting rope penetrates through a hole in the middle of the electronic balance (1) and is suspended below a measuring disc of the electronic balance (1), the metal frame (3) with the lifting rope is immersed in liquid to be measured at the A end of the communicating device (4), a water suction port of the water pump (5) is immersed in the liquid to be measured at the B end of the communicating device (4), a water outlet of the water pump (5) is arranged above the A end of the communicating device (4), and a switch is arranged in the middles of the A end of the communicating device (4) and the B end of the communicating device (4).
Detailed Description
And (3) placing the electronic balance (1) on the electronic balance support rod (2) and leveling, and pouring the liquid to be measured into the end A of the communicating vessel (4) and immersing the metal frame (3). And (3) opening a switch on the communicating vessel (4), lowering the liquid level in the end A of the communicating vessel (4), enabling the metal frame (3) to be separated from the liquid to be detected, and recording the reading M1 of the electronic balance (1) when the liquid film is just broken. And closing the switch, operating the water pump (5) to pump the liquid in the B end of the communicating vessel (4) to the A end of the communicating vessel (4), and recording the reading M2 of the electronic balance (2) when the height of the liquid film is adjusted to the position that the upper edge of the metal frame (3) is just positioned on the liquid level. The width L and the diameter d of the metal frame (3) 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 pump-suction type liquid surface tension coefficient measuring instrument comprises an electronic balance, an electronic balance support rod, a metal frame with a lifting rope, a communicating vessel and a water pump, and is characterized in that: the electronic balance is arranged on the electronic balance support rod and is adjusted to be horizontal, a hole is formed in the middle of the electronic balance, the metal frame with the lifting rope penetrates through a hole in the middle of the electronic balance and is suspended below a measuring disc of the electronic balance, the metal frame with the lifting rope is immersed into liquid to be measured at the end A of the communicating vessel, the water suction port of the water pump is immersed into the liquid to be measured at the end B of the communicating vessel, the water outlet of the water pump is arranged above the end A of the communicating vessel, and a switch is arranged between the end A of the communicating vessel and the end B of the communicating vessel.
2. The pump-suction 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 |
|---|---|---|---|
| CN202220023846.7U CN217277667U (en) | 2022-01-07 | 2022-01-07 | Pump suction type liquid surface tension coefficient measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220023846.7U CN217277667U (en) | 2022-01-07 | 2022-01-07 | Pump suction type liquid surface tension coefficient measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217277667U true CN217277667U (en) | 2022-08-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220023846.7U Active CN217277667U (en) | 2022-01-07 | 2022-01-07 | Pump suction type liquid surface tension coefficient measuring instrument |
Country Status (1)
| Country | Link |
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| CN (1) | CN217277667U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2022
- 2022-01-07 CN CN202220023846.7U patent/CN217277667U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240201 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 |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240419 Address after: 110000 Shenyang Economic and Technological Development Zone, Shenyang, Liaoning Province Patentee after: Shenyang Hengyun water pump manufacturing 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 |
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| TR01 | Transfer of patent right |