Interface tension measuring device with temperature compensation

Abstract

The utility model belongs to the technical field of interfacial tension measurement, and particularly relates to an interfacial tension measuring device with temperature compensation, which comprises a box body, wherein the box body is provided with a control panel and a display screen; the pressure detection mechanism is used for detecting the pressure of the detection ring, and the pressure detection mechanism is arranged in the box body; the detection ring is connected with the pressure detection mechanism; the placing table is in sliding connection with the box body; the detection ring is matched with the sample cup; the heating mechanism is electrically connected with the control panel; the moving mechanism is used for controlling the placing table to move up and down, and the moving mechanism is electrically connected with the control panel; the heating mechanism comprises a water bath, a temperature sensor and a resistance wire, the water bath is fixedly connected with the placement table, the sample cup is located in the water bath, and the resistance wire and the temperature sensor are fixedly connected with the water bath and electrically connected with the control panel. According to the scheme, the problem that heating is not uniform and stable enough is solved.

Description

Technical Field

[0001] This solution belongs to the field of interfacial tension measurement technology, specifically involving an interfacial tension measurement device with temperature compensation. Background Technology

[0002] An interfacial tension meter is an instrument that uses the ring suspension method to measure the interfacial and surface tension values ​​of various liquids. It measures interfacial tension based on the platinum ring method. During the interfacial tension measurement, the operator places a sample cup containing the liquid onto a sample tray. The tray then lifts the sample cup, immersing a platinum plate in the liquid. The surface tension of the liquid pulls the platinum plate downwards as much as possible. When the liquid surface tension reaches equilibrium with other forces, the highest equilibrium value measured by the tension measuring device connected to the platinum plate is the surface tension value.

[0003] Currently, an existing interfacial tension measuring instrument with publication number CN206300871U includes a chassis equipped with a display screen, a power switch, and operation buttons. Inside the chassis are a microcontroller, a printer, a motor, and a lifting mechanism for automatically raising and lowering the sample stage. The sample holder is a hollow cylinder with an electric heating element on its bottom surface for heating the sample holder. The electric heating element is connected to the microcontroller. A plastic nylon insulation layer is also provided between the inner and outer shells of the sample holder. The chassis also has a constant temperature cover that encloses and protects the platinum ring and sample holder, which is slidably connected to the chassis via a sliding cover. This invention provides a stable detection temperature environment and isolates the instrument from the outside air through the constant temperature cover, making operation more convenient and providing high detection accuracy. It is widely applicable to the determination of interfacial tension in production processes and products in industries such as power, petroleum, chemical, and railway, and has broad promotion and practical application value.

[0004] However, there is also a problem: the heating device uses a heating element for heating, which results in unstable temperature regulation and uneven heating. Utility Model Content

[0005] This solution provides a temperature-compensated interfacial tension measuring device to address the problem of insufficiently uniform and stable heating.

[0006] This solution provides a temperature-compensated interfacial tension measuring device, comprising:

[0007] Enclosure: The enclosure is equipped with a control panel and a display screen, and the display screen is electrically connected to the control panel;

[0008] Pressure detection mechanism: used to detect the pressure of the detection ring, the pressure detection mechanism is installed inside the housing;

[0009] Detection ring: The detection ring is connected to the pressure detection mechanism;

[0010] Placement platform: The placement platform is slidably connected to the box body;

[0011] Sample cup: The detection ring mates with the sample cup;

[0012] Heating mechanism: used to heat the sample cup, the heating mechanism is electrically connected to the control panel;

[0013] Moving mechanism: used to control the up and down movement of the placement platform; the moving mechanism is electrically connected to the control panel.

[0014] The heating mechanism includes a water bath, a temperature sensor, and a resistance wire. The water bath is fixedly connected to the placement platform, the sample cup is located inside the water bath, and both the resistance wire and the temperature sensor are fixedly connected to the water bath. Both the resistance wire and the temperature sensor are electrically connected to the control panel.

[0015] The principle of this solution is as follows: The control panel and display screen are used to set parameters, display real-time data, and control the system. The pressure detection mechanism is used to detect pressure changes in the detection ring, thereby calculating the interfacial tension. The detection ring is in direct contact with the liquid, and the interfacial tension is measured by the force required to pull it up. It connects to the pressure detection mechanism to transmit pressure signals.

[0016] The placement stage supports the sample cup and is connected to the housing via a sliding connection, allowing for vertical movement. The sample cup, containing the liquid to be tested, is located within a water bath to ensure the sample is in a constant temperature environment. The water bath holds the sample cup and heats the sample using a water bath method. A temperature sensor monitors the temperature within the water bath in real time. A resistance wire acts as the heating element, providing heat to maintain the set temperature. The moving mechanism controls the vertical movement of the placement stage, allowing the detection ring to smoothly enter and exit the sample cup.

[0017] The resistance wire heats the water bath according to the target temperature set on the control panel. A temperature sensor monitors the temperature inside the water bath in real time and feeds the data back to the control panel. Based on the temperature sensor data, the control panel dynamically adjusts the operating status of the resistance wire (e.g., power) to ensure the temperature inside the water bath remains constant. Interfacial tension measurement: The liquid to be tested is poured into a sample cup and placed on the platform inside the water bath. Temperature stabilization: The heating mechanism is activated, and after the temperature inside the water bath reaches the set value and stabilizes, measurement begins. The platform is raised using a moving mechanism, slowly immersing the detection ring into the liquid surface; then it is lowered again, pulling the detection ring up.

[0018] The pressure detection mechanism records the force exerted on the detection ring when it is pulled up from the liquid surface and calculates the interfacial tension value. The control panel collects the data from the pressure detection mechanism, processes it through a built-in algorithm, and finally displays the results on the screen. Based on a pre-established temperature-interfacial tension relationship model (which can be obtained by fitting experimental data), the control system automatically performs temperature compensation on the measurement results to eliminate errors caused by temperature changes.

[0019] The advantages of this method are: 1. The constant temperature environment provided by the water bath ensures stable sample temperature throughout the measurement process, reducing the impact of external temperature fluctuations on the measurement results. 2. By adjusting the set temperature of the water bath, interfacial tension measurements can be performed under different temperature conditions, making it suitable for a wider range of research needs. 3. The water bath heating temperature is more uniform, reducing the likelihood of localized heating.

[0020] Furthermore, the enclosure is equipped with a rotatable transparent protective cover, which has a handle. The transparent protective cover is made of high-strength, heat-resistant, and transparent material to ensure both clear visibility and the ability to withstand potential operational pressures and ambient temperatures. The protective cover is mounted on the enclosure via a pivot or other mechanical structure, allowing it to be easily rotated open or closed. The handle facilitates easy opening and closing of the protective cover for the operator, while improving operational comfort and safety.

[0021] Furthermore, the moving mechanism includes an air pump, a cylinder, a piston, and a push rod. The air pump and the cylinder are both fixedly connected to the housing. The air pump is electrically connected to the control panel. The piston and the cylinder are slidably sealed together. One end of the push rod is fixedly connected to the piston, and the other end is fixedly connected to the placement platform.

[0022] The piston is positioned at an initial location within the cylinder, and the push rod is at an appropriate height, positioning the sample cup on the placement stage for sample addition. The user sets parameters via the control panel and starts the air pump. The air pump injects compressed air into the cylinder, pushing the piston upwards. The push rod moves upwards along with the piston, raising the placement stage and allowing the detection ring to slowly immerse itself in the liquid surface of the sample cup.

[0023] Once the detection ring is fully immersed in the liquid, the control panel can pause the air pump operation, maintaining the placement stage at its current height for interfacial tension measurement. After measurement, the control panel reverses the air pump operation, drawing air from the cylinder to create a negative pressure environment. Under this negative pressure, the piston moves downwards, causing the push rod to descend and pulling the placement stage down, lifting the detection ring from the liquid surface. The control panel can adjust the piston's rising and falling speeds according to preset programs to meet different experimental needs. After one measurement, the piston returns to its initial position, ready for the next operation. This mechanism, through air pump pressure regulation and precise piston movement, achieves accurate control of the placement stage height, ensuring the detection ring accurately immerses and exits the liquid surface each time.

[0024] Furthermore, the pressure detection mechanism includes a pressure plate, a detection plate, a steel wire, and a lifting ring. The detection plate is fixedly connected to the housing. A pressure sensor is provided on the detection plate. The pressure sensor is electrically connected to the control panel. The pressure plate cooperates with the detection plate. One end of the steel wire is fixedly connected to the pressure plate, and the other end is fixedly connected to the lifting ring. The lifting ring and the detection ring are detachably connected.

[0025] The lifting ring and the detection ring are detachably connected, with both ends of the steel wire securely connected to the pressure plate and the lifting ring, respectively. The pressure plate is located above the detection plate and is ready to receive the force transmitted from the steel wire. The detection ring is immersed in the liquid: the moving mechanism drives the placement platform to rise, slowly immersing the detection ring into the liquid surface of the sample cup. Once the detection ring is fully immersed, the moving mechanism reverses, driving the placement platform to descend and gradually pull the detection ring up. As the detection ring is pulled from the liquid surface, the resistance generated by the liquid on the detection ring is transmitted to the pressure plate through the steel wire.

[0026] The pressure plate senses the tension from the steel wire and transmits it to the pressure sensor on the detection plate. The pressure sensor monitors and records the pressure changes on the pressure plate in real time and sends this data to the control panel. After receiving the data from the pressure sensor, the control panel uses a built-in algorithm to calculate the interfacial tension value. The final result is displayed on the screen for user viewing and recording. This mechanism, through the design of the steel wire and pressure plate, ensures a stable and lossless force transmission path from the detection ring to the pressure sensor, improving measurement accuracy. This mechanism uses a high-precision pressure sensor capable of capturing minute pressure changes and is suitable for measuring the interfacial tension of various liquids.

[0027] Furthermore, it also includes a fixing rod, through which the detection plate is fixedly connected to the housing. By firmly fixing the detection plate inside the housing with the fixing rod, the impact of external vibration or impact on the measurement results can be effectively reduced, ensuring the accuracy of the data.

[0028] Furthermore, it also includes an iron ball, a pull rope, and a metal sensing ring. The fixing rod has an inner groove, the metal sensing ring is fixedly connected to the inner groove, one end of the pull rope is fixedly connected to the inner groove, and the other end is fixedly connected to the iron ball. The iron ball cooperates with the metal sensing ring, and the metal sensing ring is electrically connected to the control panel.

[0029] The iron ball is suspended in the inner groove of the fixed rod by a pull rope and remains stationary. A metal sensing ring is fixed in the inner groove to monitor the position change of the iron ball in real time. During normal interfacial tension measurement, the iron ball remains stationary and does not trigger any signal. The detection plate is firmly fixed to the chamber by the fixed rod to ensure that its position remains unchanged throughout the experiment.

[0030] If abnormal vibration or impact occurs, causing a change in the position of the iron ball, the pull rope will move accordingly. This change in the iron ball's position triggers a signal from the metal sensor ring, which is then transmitted to the control panel. Signal processing and feedback: After receiving the signal from the metal sensor ring, the control panel processes and analyzes the data. Based on preset safety thresholds, the control panel can take appropriate measures and display an alarm on the screen.

[0031] If the enclosure is not placed on a level surface, the iron ball will also trigger the metal sensor ring to generate a signal. This is a continuous trigger. The control panel determines whether the problem is caused by vibration or ground tilt by whether the iron ball continuously triggers the metal sensor ring, and then records the abnormal event according to different situations. Attached Figure Description

[0032] Figure 1 This is a structural diagram of a temperature-compensated interfacial tension measuring device.

[0033] Figure 2 This is a cross-sectional view of a temperature-compensated interfacial tension measuring device.

[0034] Figure 3 This is an enlarged view of a temperature-compensated interfacial tension measuring device.

[0035] The instruction manual's accompanying drawings include the following markings: 1. Box body; 2. Transparent protective cover; 3. Handle; 4. Control panel; 5. Display screen; 6. Detection ring; 7. Lifting ring; 8. Steel wire; 9. Pressure plate; 10. Water bath; 11. Resistance wire; 12. Sample cup; 13. Push rod; 14. Placement stage; 15. Piston; 16. Cylinder; 17. Air pump; 18. Detection plate; 19. Inner groove; 20. Fixing rod; 21. Iron ball; 22. Pull rope; 23. Metal sensing ring. Detailed Implementation

[0036] As attached Figure 1 As shown:

[0037] The enclosure 1 is equipped with a control panel 4 and a display screen 5 for setting parameters, displaying real-time data, and controlling the system. The two are electrically connected for easy operation and monitoring. A transparent protective cover 2 is rotatably mounted on the enclosure 1, and a handle 3 is provided on the protective cover 2. The transparent protective cover 2 is made of high-strength, heat-resistant, and transparent materials, such as polycarbonate or tempered glass, to ensure both clear visibility and resistance to potential operating pressures and ambient temperatures. The protective cover is mounted on the enclosure 1 via a pivot or other mechanical structure, allowing it to be easily rotated open or closed. The handle 3 facilitates easy opening and closing of the protective cover by the operator, improving both operational comfort and safety.

[0038] As attached Figure 2 As shown:

[0039] The placement stage 14 supports the sample cup 12 and is connected to the housing 1 via a sliding connection, allowing it to move up and down. The sample cup 12 contains the liquid to be tested and is located within the water bath 10, ensuring the sample is in a constant temperature environment. The water bath 10 accommodates the sample cup 12 and heats the sample via a water bath. A temperature sensor monitors the temperature within the water bath 10 in real time. A resistance wire 11 acts as a heating element, providing heat to maintain the set temperature. The moving mechanism controls the up and down movement of the placement stage 14, allowing the detection ring 6 to smoothly enter or leave the sample cup 12.

[0040] The moving mechanism includes an air pump 17, a cylinder 16, a piston 15, and a push rod 13. The air pump 17 provides compressed air or vacuum, driving the piston 15 to reciprocate within the cylinder 16. The air pump 17 is fixedly connected to the housing 1 and connected to the control panel 4 via electrical wiring, receiving operating commands from the control system. The cylinder 16 serves as the movement space for the piston 15, and its internal seal is excellent, ensuring that changes in air pressure effectively drive the piston 15 to move.

[0041] The cylinder 16 is housed inside the housing 1, ensuring structural stability and precision. The piston 15 slides within the cylinder 16, converting the pressure provided by the air pump 17 into mechanical motion. A sliding seal design is used between the piston 15 and the cylinder 16 to prevent gas leakage and ensure the accuracy and reliability of the operation. The push rod 13 transmits the linear motion of the piston 15 to the placement platform 14, enabling the vertical movement of the placement platform 14. One end of the push rod 13 is fixedly connected to the piston 15, and the other end is fixedly connected to the placement platform 14, forming a rigid connection to ensure effective force transmission. The control panel 4 receives user input commands and controls the operating status of the air pump 17 (such as start, stop, and pressure adjustment) via electrical signals, thereby controlling the direction and speed of the piston 15.

[0042] As attached Figure 2 , Figure 3 As shown:

[0043] The pressure detection mechanism includes a pressure plate 9, a detection plate 18, a steel wire 8, and a lifting ring 7. The pressure plate 9 serves as the force transmission medium, receiving the tensile force transmitted from the lifting ring 7 through the steel wire 8. The pressure plate 9 is located on top of the detection plate 18, ensuring a stable and unbiased force transmission path. The detection plate 18 is fixed inside the housing 1 by a fixing rod 20, providing a stable support platform and integrating a pressure sensor to detect the force on the pressure plate 9.

[0044] A high-precision pressure sensor is installed on the detection plate 18, which can monitor and record the pressure changes on the pressure plate 9 in real time. The pressure sensor is electrically connected to the control panel 4, transmitting the collected data to the control system for processing and display. A steel wire 8 connects the pressure plate 9 and the lifting ring 7, transmitting the force generated when the detection ring 6 is immersed in or pulled up from the liquid. High-strength, low-elongation steel wire 8 is selected to ensure accurate force transmission and reduce errors caused by deformation of the steel wire 8. The lifting ring 7 is directly connected to the detection ring 6, moving up and down to complete the immersion and pull-up actions. The lifting ring 7 and the detection ring 6 are detachably connected, facilitating the replacement of detection rings 6 of different specifications or types to adapt to different experimental needs. One end of the steel wire 8 is fixedly connected to the pressure plate 9, and the other end is fixedly connected to the lifting ring 7, forming a complete force transmission link.

[0045] Control panel 4 receives data from the pressure sensor, processes and analyzes the data, and finally displays the interface tension value on display screen 5. Users can set parameters, start the measurement program, and monitor the entire process through control panel 4.

[0046] The fixing rod 20 has an inner groove 19 for accommodating and securing the pull rope 22 and the metal sensing ring 23. The fixing rod 20 is made of high-strength metal (such as stainless steel) to ensure structural stability and durability. The metal sensing ring 23, as part of a sensor, detects changes in the position of the iron ball 21 and transmits the signal to the control panel 4. The metal sensing ring 23 is fixed in the inner groove 19 of the fixing rod 20, monitoring the position changes of the iron ball 21 in real time. The metal sensing ring 23 is electrically connected to the control panel 4 via a wire to transmit the detected data.

[0047] The iron ball 21, acting as a weight, is suspended in the inner groove 19 of the fixed rod 20 by a pull rope 22. Its positional changes reflect the system's operating status. When the iron ball 21 moves, it triggers a signal from the metal sensing ring 23. The pull rope 22 connects the iron ball 21 and the inner groove 19, transmitting information about the iron ball 21's positional changes. The pull rope 22 is made of a high-strength and lightweight material (such as steel wire 8 or high-strength fiber) to ensure its reliability and durability during long-term use. The control panel 4 receives signals from the metal sensing ring 23, processes and analyzes the data, and issues control commands as needed.

[0048] As attached Figure 1-3 As shown:

[0049] In actual operation, the heating mechanism is started, and the resistance wire 11 heats the water bath 10 according to the target temperature set by the control panel 4. The temperature sensor monitors the temperature in the water bath 10 in real time and feeds the data back to the control panel 4, dynamically adjusting the working state of the resistance wire 11 to ensure that the temperature in the water bath 10 remains constant.

[0050] The liquid to be tested is poured into the sample cup 12 and placed on the placement platform 14 inside the water bath 10. The heating mechanism is activated, and after the temperature inside the water bath 10 reaches the set value and stabilizes, the placement platform 14 is raised by the moving mechanism, allowing the detection ring 6 to be slowly immersed in the liquid surface; then it is lowered again, pulling up the detection ring 6. The pressure detection mechanism records the force exerted on the detection ring 6 when it is pulled up from the liquid surface and calculates the interfacial tension value.

[0051] Control panel 4 collects data from the pressure detection mechanism, processes it using a built-in algorithm, and finally displays the results on display screen 5. Based on a pre-established temperature-interfacial tension relationship model, the control system automatically performs temperature compensation on the measurement results to eliminate errors caused by temperature changes.

[0052] If abnormal vibration or impact occurs, causing a change in the position of the iron ball 21, the pull rope 22 will move accordingly. This change in the position of the iron ball 21 will trigger the metal sensor ring 23 to generate a signal, which is then transmitted to the control panel 4. Signal processing and feedback: After receiving the signal from the metal sensor ring 23, the control panel 4 processes and analyzes the data. Based on the preset safety threshold, the control panel 4 can take corresponding measures and display an alarm on the display screen 5.

[0053] The advantages of this solution are as follows: 1. The iron ball 21, pull rope 22, and metal sensing ring 23 monitor the vibration status of the system in real time. Once abnormal vibration or impact occurs, the system can react immediately to prevent potential safety hazards and issue an alarm on the display screen 5. If the box 1 is not placed horizontally, the iron ball 21 will also trigger the metal sensing ring 23 to generate a signal. The control panel 4 determines whether the vibration or the tilt of the ground is caused by the iron ball 21 triggering the metal sensing ring 23 for a long time, and then records the abnormal event according to different situations. 2. The constant temperature environment provided by the water bath 10 ensures that the sample temperature is stable throughout the measurement process, reducing the impact of external temperature fluctuations on the measurement results. 3. By adjusting the set temperature of the water bath 10, interfacial tension measurements can be performed under different temperature conditions, which is suitable for a wider range of research needs.

[0054] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A temperature-compensated interfacial tension measuring device, comprising: Box (1): The box (1) is provided with a control panel (4) and a display screen (5), and the display screen (5) is electrically connected to the control panel (4); Pressure detection mechanism: used to detect the pressure of the detection ring (6), the pressure detection mechanism is set inside the housing (1); Detection ring (6): The detection ring (6) is connected to the pressure detection mechanism; Placement platform (14): The placement platform (14) is slidably connected to the box body (1); Sample cup (12): The detection ring (6) is fitted with the sample cup (12); Heating mechanism: used to heat the sample cup (12), the heating mechanism being electrically connected to the control panel (4); Motion mechanism: used to control the up and down movement of the placement platform (14), the motion mechanism is electrically connected to the control panel (4); Its features are, The heating mechanism includes a water bath (10), a temperature sensor and a resistance wire (11). The water bath (10) is fixedly connected to the placement platform (14). The sample cup (12) is located inside the water bath (10). The resistance wire (11) and the temperature sensor are both fixedly connected to the water bath (10). The resistance wire (11) and the temperature sensor are both electrically connected to the control panel (4).

2. The interfacial tension measuring device with temperature compensation according to claim 1, characterized in that, The box (1) is equipped with a transparent protective cover (2) that rotates, and the transparent protective cover (2) is equipped with a handle (3).

3. The interfacial tension measuring device with temperature compensation according to claim 1, characterized in that, The moving mechanism includes an air pump (17), a cylinder (16), a piston (15), and a push rod (13). The air pump (17) and the cylinder (16) are both fixedly connected to the housing (1). The air pump (17) is electrically connected to the control panel (4). The piston (15) and the cylinder (16) are slidably sealed together. One end of the push rod (13) is fixedly connected to the piston (15), and the other end is fixedly connected to the placement platform (14).

4. The interfacial tension measuring device with temperature compensation according to claim 1, characterized in that, The pressure detection mechanism includes a pressure plate (9), a detection plate (18), a steel wire (8), and a lifting ring (7). The detection plate (18) is fixedly connected to the housing (1). A pressure sensor is provided on the detection plate (18). The pressure sensor is electrically connected to the control panel (4). The pressure plate (9) cooperates with the detection plate (18). One end of the steel wire (8) is fixedly connected to the pressure plate (9), and the other end is fixedly connected to the lifting ring (7). The lifting ring (7) is detachably connected to the detection ring (6).

5. The interfacial tension measuring device with temperature compensation according to claim 4, characterized in that, It also includes a fixing rod (20), and the detection plate (18) is fixedly connected to the box (1) by the fixing rod (20).

6. The interfacial tension measuring device with temperature compensation according to claim 5, characterized in that, It also includes an iron ball (21), a pull rope (22) and a metal sensing ring (23). The fixed rod (20) is provided with an inner groove (19). The metal sensing ring (23) is fixedly connected to the inner groove (19). One end of the pull rope (22) is fixedly connected to the inner groove (19) and the other end is fixedly connected to the iron ball (21). The iron ball (21) cooperates with the metal sensing ring (23). The metal sensing ring (23) is electrically connected to the control panel (4).

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