Liquid surface tension coefficient tester

Abstract

The utility model discloses a liquid surface tension coefficient tester which comprises a bottom plate, the upper side of the bottom plate is connected with a cross rod through a lifting device, a plurality of force sensors are sequentially installed on the side wall of the cross rod, the force sensors are all connected with a measuring hanging ring through hanging ropes, and the measuring hanging ring is connected with the lifting rope. A container disc is arranged under each measuring hanging ring, the bottom side of each container disc is fixedly connected to the upper side of the bottom plate through a supporting rod, a heater is arranged on the side wall of the inner bottom of each container disc, and a thermometer is arranged on the inner side wall of each container disc. According to the utility model, liquid surface tension coefficient experiments can be carried out on a plurality of liquids with different temperatures at a time, the experiment range and efficiency are expanded, and the practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid surface tension coefficient measurement, in particular to a liquid surface tension coefficient measuring instrument. Background Art

[0002] The surface tension coefficient of a liquid is an important parameter that reflects the properties of the liquid. The pull-off method uses a weighing instrument to directly measure the surface tension of the liquid. The measurement method is intuitive and the concept is clear. It is a commonly used method for measuring the surface tension of the liquid.

[0003] In the existing technology, for example, a Chinese utility model patent with a publication date of May 15, 2013 and a publication number of CN202939112U discloses a liquid surface tension coefficient measuring device, comprising: a base, the base being connected to a tray via a support column, a liquid container being mounted on the tray, an annular hanging piece being mounted above the liquid container, the annular hanging piece being connected to a beam having a force-sensitive sensor mounted therein, the beam being mounted on a bracket, a lifting adjustment mechanism being mounted on the bracket, the bracket being fixedly mounted on the base, the force-sensitive sensor being connected to a liquid surface tension coefficient measuring instrument; by adopting the force-sensitive sensor to be connected to the liquid surface tension coefficient measuring instrument, the measurement results are easy to observe, the adjustment steps are reduced, the operation is convenient, the device is resistant to airflow interference, the measurement error is small, the accuracy is high, the experimental principle is clearly expressed and intuitive, and the device can be widely used in experiments and scientific research in physics, chemistry, etc.

[0004] However, the technical solution of this utility model patent can only test the surface tension coefficient of liquids at room temperature on the same test stand, and cannot simultaneously test multiple liquids at different temperatures on the same test stand, thereby narrowing the scope of the experiment. To this end, a liquid surface tension coefficient measuring instrument is proposed. Utility Model Content

[0005] The utility model provides a liquid surface tension coefficient measuring instrument to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A liquid surface tension coefficient measuring instrument includes a base plate, the upper side of the base plate is connected to a cross bar via a lifting device, multiple force-sensitive sensors are installed in sequence on the side walls of the cross bar, multiple force-sensitive sensors are connected to a measuring ring via a lifting rope, a container plate is provided directly below each measuring ring, the bottom side of the container plate is fixedly connected to the upper side of the base plate via a supporting rod, a heater is provided on the inner bottom side wall of each container plate, and a thermometer is provided on the inner side wall of each container plate.

[0008] Preferably, the lifting device includes a threaded rod, which is rotatably connected to the upper side of the base plate, the threaded rod is threadedly connected to the side wall of the cross bar, the threaded rod passes through the side wall of the cross bar, the upper side of the base plate is fixedly connected to a vertical rod, the vertical rod passes through the side wall of the cross bar, a second gear is fixedly connected to the bottom side wall of the threaded rod, the side wall of the second gear is meshed with a first gear, the upper side of the base plate is fixedly connected to a motor, and the first gear is fixedly connected to the output shaft of the motor.

[0009] Preferably, the bottom end of the threaded rod is rotatably connected to the upper side of the base plate through a bearing.

[0010] Preferably, the plurality of force-sensitive sensors are connected to a measuring instrument via cable electrical signals.

[0011] Preferably, the measuring ring is made of a material selected from the group consisting of aluminum alloy, platinum, stainless steel, polytetrafluoroethylene, polyethylene, and glass.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The device is equipped with multiple container plates, heaters, thermometers, measuring rings, force-sensitive sensors and other components that work together to conduct liquid surface tension coefficient experiments on multiple liquids at different temperatures at one time, expanding the scope and efficiency of the experiment and being highly practical.

[0014] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the description, the following is a detailed description of the preferred embodiments of the present invention with the accompanying drawings. The specific implementation methods of the present invention are given in detail in the following embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of a liquid surface tension coefficient measuring instrument proposed by the present invention;

[0017] Figure 2 This is a front cross-sectional structural schematic diagram of a liquid surface tension coefficient measuring instrument proposed by the utility model.

[0018] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0019] 1. Threaded rod; 2. Force sensor; 3. Lifting rope; 4. Measuring ring; 5. First gear; 6. Heater; 7. Thermometer; 8. Support rod; 9. Container plate; 10. Second gear; 11. Motor; 12. Cable; 13. Measuring instrument; 14. Horizontal rod; 15. Base plate; 16. Vertical rod. DETAILED DESCRIPTION

[0020] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples provided are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. The following paragraphs describe the present invention in more detail by way of example with reference to the accompanying drawings. It should be noted that the drawings are greatly simplified and not to exact scale, and are intended solely to facilitate and clearly illustrate the embodiments of the present invention.

[0021] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a central component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] See also Figures 1-2In an embodiment of the present invention, a liquid surface tension coefficient measuring instrument includes a base plate 15, the upper side of the base plate 15 is connected to a cross bar 14 through a lifting device, and a plurality of force-sensitive sensors 2 are sequentially installed on the side walls of the cross bar 14, and the plurality of force-sensitive sensors 2 are electrically connected to the measuring instrument 13 through cables 12, and the plurality of force-sensitive sensors 2 are connected to a measuring ring 4 through a hanging rope 3, and the plurality of measuring rings 4 are at the same horizontal height, and the measuring rings 4 are made of a material selected from the group consisting of aluminum alloy, platinum, stainless steel, polytetrafluoroethylene, polyethylene, and glass. A container tray 9 is provided directly below each measuring ring 4, and the bottom side of the container tray 9 is fixedly connected to the upper side of the base plate 15 by a support rod 8. The heights of the plurality of container trays 9 are different, and they are arranged in sequence from bottom to height. When multiple measuring rings 4 are measured, the multiple measuring rings 4 will be pulled out of the liquid surface in each container tray 9 in sequence to avoid tension errors caused by multiple measuring rings 4 being pulled out of the liquid surface at the same time.

[0024] A heater 6 is provided on the inner bottom side wall of each container tray 9 , and a thermometer 7 is provided on the inner side wall of each container tray 9 .

[0025] Specifically, the lifting device includes a threaded rod 1, the bottom end of the threaded rod 1 is rotatably connected to the upper side of the base plate 15 through a bearing, the threaded rod 1 is threadedly connected to the side wall of the cross bar 14, the threaded rod 1 passes through the side wall of the cross bar 14, the upper side of the base plate 15 is fixedly connected to a vertical rod 16, the vertical rod 16 passes through the side wall of the cross bar 14, the bottom side wall of the threaded rod 1 is fixedly connected to a second gear 10, the side wall of the second gear 10 is meshed with a first gear 5, the upper side of the base plate 15 is fixedly connected to a motor 11, the first gear 5 is fixedly connected to the output shaft of the motor 11, and then the forward and reverse rotation of 11 can be controlled by 5 and 10 to drive 1 to rotate forward and reverse, the forward and reverse rotation of 1 can drive 14 to lift and lower, and then 11 can drive 14 to lift and lower.

[0026] The working principle of this utility model is:

[0027] During use, the liquid to be tested can first be placed in multiple container trays 9 respectively. At this time, the solutions in the multiple container trays 9 can be heated to different temperatures according to the heater 6, and then the cross bar 14 can be controlled to rise and fall by the motor 11, so that the cross bar 14 drives the multiple measuring rings 4 to be immersed in the container tray 9, and then the cross bar 14 is raised to drive the multiple measuring rings 4 to rise, and the multiple measuring rings 4 will be pulled out of the liquid surface in each container tray 9 in turn. When each measuring ring 4 is gradually pulled out of the liquid surface, the measuring instrument 13 can detect the force values ​​U1 and U2 before and after the corresponding measuring ring 4 leaves the liquid surface through the force sensitive sensor 2, and finally calculate the liquid surface tension coefficient α through the formula, liquid surface tension coefficient α = (U1-U2) / π(D1+D2)B, where D1 and D2 are the inner and outer diameters of the ring 4, and B is the sensitivity of the force sensitive sensor 2.

[0028] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any ordinary technician in this industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with this profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. A liquid surface tension coefficient measuring instrument, comprising a bottom plate (15), characterized in that: The upper side of the bottom plate (15) is connected to a cross bar (14) via a lifting device, and a plurality of force-sensitive sensors (2) are sequentially mounted on the side walls of the cross bar (14). The plurality of force-sensitive sensors (2) are connected to a measuring ring (4) via a lifting rope (3). A container plate (9) is provided directly below each measuring ring (4), and the bottom side of the container plate (9) is fixedly connected to the upper side of the bottom plate (15) via a supporting rod (8). A heater (6) is provided on the inner bottom side wall of each container plate (9), and a thermometer (7) is provided on the inner side wall of each container plate (9).

2. A liquid surface tension coefficient measuring instrument according to claim 1, characterized in that: The lifting device comprises a threaded rod (1), wherein the threaded rod (1) is rotatably connected to the upper side of a bottom plate (15), the threaded rod (1) is threadedly connected to the side wall of a cross bar (14), the threaded rod (1) passes through the side wall of the cross bar (14), the upper side of the bottom plate (15) is fixedly connected to a vertical rod (16), the vertical rod (16) passes through the side wall of the cross bar (14), the bottom side wall of the threaded rod (1) is fixedly connected to a second gear (10), the side wall of the second gear (10) is meshedly connected to a first gear (5), the upper side of the bottom plate (15) is fixedly connected to a motor (11), and the first gear (5) is fixedly connected to the output shaft of the motor (11).

3. A liquid surface tension coefficient measuring instrument according to claim 2, characterized in that: The bottom end of the threaded rod (1) is rotatably connected to the upper side of the bottom plate (15) via a bearing.

4. A liquid surface tension coefficient measuring instrument according to claim 3, characterized in that: The plurality of force-sensitive sensors (2) are all connected to a measuring instrument (13) via electrical signals from cables (12).

5. A liquid surface tension coefficient measuring instrument according to claim 4, characterized in that: The measuring suspension ring (4) is made of a material selected from the group consisting of aluminum alloy, platinum, stainless steel, polytetrafluoroethylene, polyethylene, and glass.

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