CN219455855U - Temperature-control surface tension measuring device - Google Patents
Temperature-control surface tension measuring device Download PDFInfo
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- CN219455855U CN219455855U CN202223572014.XU CN202223572014U CN219455855U CN 219455855 U CN219455855 U CN 219455855U CN 202223572014 U CN202223572014 U CN 202223572014U CN 219455855 U CN219455855 U CN 219455855U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model discloses a temperature-control surface tension measuring device, which comprises a machine body (1) and is characterized in that: the top of organism (1) is provided with tension balance (2), and the couple of tension balance (2) is gone up to hang and is had platinum ring/platinum board (3), is equipped with sample cell (4) under platinum ring/platinum board (3), sample cell (4) fix in semiconductor temperature regulating device (5) that can go up and down, the liquid level in semiconductor temperature regulating device (5) is higher than the sample liquid level in sample cell (4). The temperature-control surface tension measuring device can quickly and accurately measure the surface tension and the interfacial tension of the liquid by automatically lifting and lowering the sample at constant temperature.
Description
Technical Field
The utility model relates to the technical field of liquid tension measurement, in particular to a temperature-control surface tension measurement device.
Background
The surface tension refers to the tension along the surface acting on any boundary line, which is generated by the imbalance of molecular attraction force of the liquid surface layer. At the interface between liquid and gas, or between two immiscible liquids, extremely small tensile forces are created due to the attractive forces between the molecules, which are experienced by the liquid and gas, and the liquid and liquid interface.
The surface tension is related to the nature and temperature of the liquid. Since the surface tension exists only at the free surface of the liquid or at the interface between two immiscible liquids, its magnitude is generally measured by the surface tension coefficient sigma. Sigma represents the number of tensile forces per unit length on the surface, in N/m. The surface tension of various liquids is widely covered, and the sigma value is affected by temperature change, and in general, the higher the temperature, the smaller the surface tension. In addition, the impurities can also change the surface tension of the liquid obviously, for example, the surface of clean water has a larger shrinkage tendency and has a larger surface tension, and the surface tension of water stained with soap solution is smaller.
When surface tension measurements are made, the surface Zhang Lifang is tangential to the liquid surface and perpendicular to any two-part line of demarcation of the liquid surface. The surface tension measurement method is divided into a static method and a dynamic method, wherein the static method comprises a capillary rising method, a drop volume method, a hanging ring method, a hanging piece method and a maximum bubble pressure method, and the dynamic method comprises a rotary drop method, a hanging drop method and an oscillation jet method. The property of the liquid is measured, and a static method is mostly selected when the solvent composition of the liquid to be measured is judged.
The basic principle of the hanging ring method is that a metal ring immersed on the liquid level is separated from the liquid level, and the required maximum pulling force is equal to the product of the weight of the hanging ring and the surface tension and the perimeter of the separated liquid level. When the surface tension of the ring is needed to be paid attention to have a time effect during measurement, the ring is carefully pulled away from the liquid level so as to avoid disturbance of the liquid level, and the ring is a round metal ring which is easy to deform under external force, so that the perimeter of the detached liquid level is changed, and the measurement result is influenced.
The hanging sheet method is to measure the tensile force of the roughened platinum sheet, glass sheet or filter paper sheet when the bottom side parallel interface just contacts the interface. The maximum tension of the hanger plate required to be separated from the liquid surface and counter to the surface tension can be measured by adopting a separation method, or the liquid surface can be slowly lifted to be just contacted with the hanger plate hung by a balance and with known weight, and the increment is measured to obtain the surface tension value. The hanging piece method has the advantages of simple operation, no correction, high precision, large sample consumption required by measurement, slow sample heating speed, and particularly suspension sample, and particle sedimentation caused by overlong heating time, thereby causing measurement errors.
The surface tension is measured at room temperature, 20-25 ℃, a temperature control device is required to have the functions of heating and cooling, water bath or water bath circulation is adopted for conventional temperature control, the temperature of a balanced sample is slow, the temperature is indirectly transferred, and the temperature difference exists. And the temperature of the water bath is adjusted according to the ambient temperature during each measurement, and the sample temperature is different when the set temperature of the circulating water bath is the same under different ambient temperatures. The method takes too long time to balance the temperature, so that the moisture or solvent in the sample is evaporated, the composition concentration is changed, and the measured result is inaccurate. In addition, the existing sample measurement has no sample temperature detection function, a thermometer is required to be used for probing detection, and the insertion and extraction of the thermometer can cause the fluctuation of a sample interface and the balance is broken.
Disclosure of Invention
The utility model aims to solve the problems in the prior art and provides a temperature-control surface tension measuring device capable of rapidly and accurately measuring the surface tension and interfacial tension of liquid.
The utility model aims at solving the problems through the following technical scheme:
the utility model provides a accuse temperature surface tension survey device, includes organism, its characterized in that: the top of organism is provided with the tension balance, and the couple of tension balance is hung on has platinum ring/platinum board, is equipped with the sample cell under platinum ring/platinum board, the sample cell fix in the semiconductor temperature regulating device that can go up and down, the liquid level in the semiconductor temperature regulating device is higher than the sample liquid level in the sample cell.
The upper part of the semiconductor temperature control device is of an inward concave design, a plurality of metal trays are arranged in parallel in the concave surface, a top insulator, a cold side copper sheet, a ceramic inductor, a hot side copper sheet, a bottom insulator and a cold bath mechanism are sequentially arranged below the metal trays, the hot side copper sheet is connected with a temperature control circuit through an electric wire, and the cold bath mechanism is communicated with a cooling circulation device through a circulating water pipeline.
The metal tower plate is made of copper sheets.
The lower edge of the metal tower plate is connected with a metal thermistor.
The cooling circulation device comprises cooling fins, a cooling water tank and a circulation pump, wherein an inlet of the cooling fins is connected with one cooling circulation interface of the cooling circulation device through a circulation water pipeline, an outlet of the cooling fins is connected with an inlet of the cooling water tank through a circulation water pipeline, an outlet of the cooling water tank is connected with an inlet of the circulation pump through a circulation water pipeline, an outlet of the circulation pump is connected with the other cooling circulation interface of the cooling circulation device through a circulation water pipeline, and the two cooling circulation interfaces are respectively connected with the two temperature control interfaces on the semiconductor temperature control device through corresponding circulation water pipelines.
The cooling water tank adopts a cooling compressor to cool, and a temperature probe is arranged on the cooling water tank.
The semiconductor temperature control device is arranged at the top end of the lifting threaded rod, and the lifting threaded rod is driven by a lifting motor positioned in the machine body.
The bottom of the sample cell is of a multi-piece structure, and the bottom of the sample cell can be embedded into a metal column plate in the concave surface of the semiconductor temperature control device.
The inner wall upper portion of sample cell is equipped with the ring, and the ring is used for fixed sample cell temperature probe, and sample cell temperature probe is connected with the temperature display mechanism that sets up in the organism through the circuit, and temperature display mechanism can show the real-time temperature of the sample in the sample cell.
The top of the sample cell is provided with a transparent heat-insulating cover with a through hole.
The semiconductor refrigerating sheet is also called thermoelectric refrigerating sheet, and its principle is Peltier effect, it can make refrigeration and heating, and can change polarity of direct current to make refrigeration or heating on the same refrigerating sheet, and the production of said effect is implemented by means of thermoelectric principle.
Compared with the prior art, the utility model has the following advantages:
according to the temperature control surface tension measuring device, the contact area between the measured sample and the semiconductor temperature control device is increased, so that the liquid sample is fully, quickly and accurately kept at the target temperature, particularly when the suspension sample is measured, the influence of particle sedimentation and the like caused by overlong heating time can be reduced, the measuring error among the samples is reduced, the semiconductor temperature control device can be lifted electrically, and the quick and accurate measurement of the surface tension and the interfacial tension of the liquid, particularly the suspension liquid, can be realized.
Drawings
FIG. 1 is a schematic diagram of a temperature-controlled surface tension measuring device according to the present utility model;
FIG. 2 is a schematic diagram of the structure of the sample cell of the present utility model;
FIG. 3 is a schematic diagram of a semiconductor temperature control device according to the present utility model;
FIG. 4 is a schematic diagram of the connection relationship between the semiconductor temperature control device and the cooling circulation device according to the present utility model;
FIG. 5 is a schematic diagram showing the measurement of the surface tension of a liquid by a platinum plate method in the temperature-controlled surface tension measuring device of the present utility model;
FIG. 6 is a schematic diagram showing the measurement of the surface tension of a liquid by a platinum loop method in the temperature-controlled surface tension measuring device of the present utility model.
Wherein: 1-a machine body; 2-a tension balance; 3-platinum ring/plate; 4, a sample pool; 41-a circular ring; 42—a sample cell temperature probe; 43-a temperature display mechanism; 5-a semiconductor temperature control device; 50-metal tray; 51—top insulator; 52-a cold side copper sheet; 53-ceramic inductor; 54-hot side copper sheet; 55-a bottom insulator; 56—a cold bath mechanism; 57—a metal thermistor; 58-a temperature control interface; 6, a circulating water pipeline; 7-a cooling circulation device; 70-heat sink; 71-a cooling water tank; 72-a circulation pump; 73—a cooling cycle interface; 74-cooling the compressor; 75-temperature probe; 8-a temperature control circuit; 9-lifting the threaded rod; 10-lifting motor.
Detailed Description
The utility model is further described below with reference to the drawings and examples.
As shown in fig. 1-6: the utility model provides a accuse temperature surface tension survey device, includes organism 1, is provided with tension balance 2 at the top of organism 1, and the couple of tension balance 2 is hung on has platinum ring/platinum board 3, is equipped with sample cell 4 under platinum ring/platinum board 3, and this sample cell 4 is fixed in semiconductor temperature regulating device 5 that can go up and down, and the liquid level in the semiconductor temperature regulating device 5 is higher than the sample liquid level in the sample cell 4. The temperature-controlled surface tension measuring device can measure the surface tension and interfacial tension of a liquid by using a platinum loop method and a platinum plate method.
As shown in fig. 1, 3 and 4, the semiconductor temperature control device 5 is a semiconductor refrigeration sheet, and about two thirds of the area of the upper part of the semiconductor temperature control device 5 is concave, and a plurality of metal trays 50 (preferably copper sheets) are arranged in parallel in the concave, wherein the height of each metal tray 50 is not higher than the upper plane of the semiconductor temperature control device 5, so that the contact area with the sample cell 4 is increased, and heat can be quickly exchanged; a top insulator 51, a cold side copper sheet 52, a ceramic inductor 53, a hot side copper sheet 54, a bottom insulator 55 and a cold bath mechanism 56 are sequentially arranged below the metal tray 50, a metal thermistor 57 is connected with the lower edge of the metal tray 50, the hot side copper sheet 54 is connected with a temperature control circuit 8 through an electric wire, and the cold bath mechanism 56 is communicated with a cooling circulation device 7 through a circulating water pipeline 6. In use, current passes through the hot side copper sheet 54, the ceramic inductor 53 and the cold side copper sheet 52, the cold side copper sheet 52 generates low temperature, the hot side copper sheet 54 generates high temperature, and the generated heat is conducted out of the semiconductor temperature control device 5 through the cold bath. The refrigeration or heating on the same semiconductor refrigerating sheet can be determined by changing the polarity of the direct current, when the temperature of the semiconductor temperature control device 5 is high, the resistance value of the metal thermistor 57 is increased along with the temperature rise, the current passing through the metal thermistor 57 is reduced, and thus the current passing through the copper sheet is reduced, and the heating capacity is reduced; similarly, when the temperature is too low, the resistance of the metal thermistor 57 decreases, the current increases, and the heating capacity increases.
As shown in fig. 2, the bottom of the matched sample cell 4 is also in a multi-piece structure, and the bottom of the sample cell 4 can be embedded into a metal tray 50 in the concave surface of the semiconductor temperature control device 5 so as to increase the contact area; the upper part of the inner wall of the sample cell 4 is provided with a circular ring 41 with a small hole, the sample cell temperature probe 42 stretches into the circular ring 41 from the small hole, so that the circular ring 41 can fix the sample cell temperature probe 42, the sample cell temperature probe 42 is connected with a temperature display mechanism 43 arranged in the machine body 1 through a circuit, and the temperature display mechanism 43 can display the real-time temperature of a sample in the sample cell 4. The top of the sample cell 4 is provided with a transparent heat-insulating cover, and a through hole is reserved in the middle of the transparent heat-insulating cover and is used for the passing of a platinum plate or a platinum ring 3. When in use, the liquid level of the sample pool 4 is slightly lower than that of the semiconductor temperature control device 5, so as to enhance the heating, cooling and heat preservation effects on the sample.
The structure has the advantages of fast heating and cooling speed of the semiconductor and reduced sample temperature balancing time. The temperature and concentration are conditions affecting the second surface Zhang Liwei, and the structure solves the problems that the equilibrium temperature is too long, and the composition concentration is changed due to evaporation of water or solvent in the sample, so that the measured result is inaccurate. The structure of the sample cell 4 ensures that the contact area of the sample and the semiconductor temperature control device is large, the heat exchange rate is high, the bottom multi-sheet structure of the sample cell 4 can also fix the sample cell 4, and meanwhile, the sample consumption is reduced, and compared with a glass surface dish used conventionally, the volume is small, the consumption is less, so that the problems of large sample consumption and low temperature rising speed are solved.
As shown in fig. 1 and 4, the cooling circulation device 7 comprises a cooling fin 70, a cooling water tank 71 and a circulation pump 72, wherein an inlet of the cooling fin 70 is connected with one cooling circulation interface 73 of the cooling circulation device 7 through a circulation water pipeline 6, an outlet of the cooling fin 70 is connected with an inlet of the cooling water tank 71 through the circulation water pipeline 6, an outlet of the cooling water tank 71 is connected with an inlet of the circulation pump 72 through the circulation water pipeline 6, an outlet of the circulation pump 72 is connected with the other cooling circulation interface 73 of the cooling circulation device 7 through the circulation water pipeline 6, and the two cooling circulation interfaces 73 are respectively connected with two temperature control interfaces 58 on the semiconductor temperature control device 5 through corresponding circulation water pipelines 6; the heat sink 70 is a multi-sheet metal structure, and after absorbing heat, the heat is dissipated in a convection manner; the cooling water tank 71 is cooled by a cooling compressor 74, and a temperature probe 75 is provided on the cooling water tank 71.
In normal use, the cooling liquid circulates through the circulating pump 72, absorbs the heat generated by the semiconductor, and then is transmitted to the radiating fins 70, so that the room temperature is quickly radiated; when the temperature of the cooling liquid for cooling the semiconductor exceeds a set threshold, the cooling compressor 74 starts cooling to cool the cooling liquid to the set value. The cooling circulation device 7 is connected to the cooling bath mechanism 56 in the semiconductor temperature control device 5 through a pipeline, and cooling water is supplied to the cooling bath mechanism 56 through the circulation water pipeline 6.
The device has the advantages that the device is cooled by water cooling under the conventional use condition, and the device is energy-saving, mute and small in vibration. Because the specific heat capacity of water is larger, and under the condition of Q=Cm delta t and the same mass, because C is inversely proportional to delta t, the temperature of water which absorbs the same heat is small, and when the temperature change amount is the same, C is inversely proportional to m, the larger the specific heat capacity is, the smaller the required mass is, the smaller the water cooling temperature fluctuation is adopted, and the effect is good.
As shown in fig. 1, the semiconductor temperature control device 5 can be connected with the driving end of a lifting motor 10 in the machine body 1 through a lifting threaded rod 9, and the lifting threaded rod 9 is connected with the lifting motor 10 and can be lifted electrically.
In the structure, the machine head and the base of the machine body 1 are provided with the transparent wind shield which can be opened and closed and detached.
When the temperature-control surface tension measuring device is used, the platinum ring/platinum plate 3 is immersed into a sample to be measured, the sample cell 4 is lowered, when the platinum ring/platinum plate 3 starts to be pulled away, the liquid has a downward pulling force on the platinum ring/platinum plate, and the maximum pulling force value is converted into the surface tension value of the liquid. Or the liquid level is slowly raised to be just contacted with a hanging plate with known weight hung on the tension balance 2, when the platinum plate is sensed to be immersed into the measured liquid, the periphery of the platinum plate is subjected to the action of surface tension, and the surface tension of the liquid can pull the platinum plate downwards as much as possible; when the platinum plate is contacted with the liquid level, the tension force is suddenly changed, a stop button is clicked to stop the sample pool 4 from rising, the platinum plate stops immersing into the liquid, and the tension force is converted into the surface tension value of the liquid after the platinum plate is contacted with the liquid; the device is capable of recording the values at a plurality of time points.
The temperature-control surface tension measuring device can quickly and accurately measure the surface tension and the interfacial tension of the liquid by automatically lifting and lowering the sample at constant temperature.
The above embodiments are only for illustrating the technical idea of the present utility model, and the protection scope of the present utility model is not limited by the above embodiments, and any modification made on the basis of the technical scheme according to the technical idea of the present utility model falls within the protection scope of the present utility model; the technology not related to the utility model can be realized by the prior art.
Claims (10)
1. The utility model provides a accuse temperature surface tension survey device, includes organism (1), its characterized in that: the top of organism (1) is provided with tension balance (2), and the couple of tension balance (2) is gone up to hang and is had platinum ring/platinum board (3), is equipped with sample cell (4) under platinum ring/platinum board (3), sample cell (4) fix in semiconductor temperature regulating device (5) that can go up and down, the liquid level in semiconductor temperature regulating device (5) is higher than the sample liquid level in sample cell (4).
2. The temperature-controlled surface tension measuring device according to claim 1, wherein: the upper portion of semiconductor temperature regulating device (5) is concave design in the interior metal column tray (50) that is multi-disc parallel arrangement of concave, is equipped with top insulator (51), cold side copper sheet (52), ceramic inductor (53), hot side copper sheet (54), bottom insulator (55) and cold bath mechanism (56) in proper order in the below of metal column tray (50), hot side copper sheet (54) be connected through the electric wire with temperature regulating circuit (8), cold bath mechanism (56) be linked together with cooling circulation device (7) through circulating water pipeline (6).
3. The temperature-controlled surface tension measuring device according to claim 2, wherein: the metal tower plate (50) is made of copper sheets.
4. A temperature-controlled surface tension measuring device as recited in claim 2 or 3, wherein: the lower edge of the metal tray (50) is connected with a metal thermistor (57).
5. The temperature-controlled surface tension measuring device according to claim 2, wherein: the cooling circulation device (7) comprises cooling fins (70), a cooling water tank (71) and a circulation pump (72), wherein an inlet of the cooling fins (70) is connected with one cooling circulation interface (73) of the cooling circulation device (7) through a circulation water pipeline (6), an outlet of the cooling fins (70) is connected with an inlet of the cooling water tank (71) through the circulation water pipeline (6), an outlet of the cooling water tank (71) is connected with an inlet of the circulation pump (72) through the circulation water pipeline (6), an outlet of the circulation pump (72) is connected with the other cooling circulation interface (73) of the cooling circulation device (7) through the circulation water pipeline (6), and the two cooling circulation interfaces (73) are respectively connected with two temperature control interfaces (58) on the semiconductor temperature control device (5) through corresponding circulation water pipelines (6).
6. The temperature-controlled surface tension measuring device according to claim 5, wherein: the cooling water tank (71) adopts a cooling compressor (74) to cool, and a temperature probe (75) is arranged on the cooling water tank (71).
7. The temperature-controlled surface tension measuring device according to claim 1, wherein: the semiconductor temperature control device (5) is arranged at the top end of the lifting threaded rod (9), and the lifting threaded rod (9) is driven by a lifting motor (10) positioned in the machine body (1).
8. The temperature-controlled surface tension measuring device according to claim 1 or 2, wherein: the bottom of the sample cell (4) is of a multi-piece structure, and the bottom of the sample cell (4) can be embedded into a metal column plate (50) in the concave surface of the semiconductor temperature control device (5).
9. The temperature-controlled surface tension measuring device according to claim 1, wherein: the inner wall upper portion of sample cell (4) is equipped with ring (41), and ring (41) are used for fixed sample cell temperature probe (42), and sample cell temperature probe (42) are connected with temperature display mechanism (43) that set up in organism (1) through the circuit, and temperature display mechanism (43) can show the real-time temperature of the sample in sample cell (4).
10. The temperature-controlled surface tension measuring device according to claim 1, wherein: the top of the sample cell (4) is provided with a transparent heat-preserving cover with a through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223572014.XU CN219455855U (en) | 2022-12-31 | 2022-12-31 | Temperature-control surface tension measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223572014.XU CN219455855U (en) | 2022-12-31 | 2022-12-31 | Temperature-control surface tension measuring device |
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| Publication Number | Publication Date |
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| CN219455855U true CN219455855U (en) | 2023-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223572014.XU Active CN219455855U (en) | 2022-12-31 | 2022-12-31 | Temperature-control surface tension measuring device |
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| CN (1) | CN219455855U (en) |
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- 2022-12-31 CN CN202223572014.XU patent/CN219455855U/en active Active
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