Device for sucking test sample in capillary tube for measuring kinematic viscosity

Abstract

The utility model relates to a device for sucking a sample in a capillary tube for measuring kinematic viscosity, and relates to the related field of kinematic viscosity measurement. The device comprises an asphalt sample barrel, a supporting piece, a rubber suction head, a bearing sheath, a kinematic viscometer, a heat preservation assembly, a first connecting pipe, a second connecting pipe, a control valve, a pressure meter and a suction pump. The supporting piece provides a stable temperature environment, the rubber suction head sucks a sample, the bearing sheath ensures the safety of the suction process, the heat preservation assembly ensures the constant temperature, and the control valve and the pressure gauge achieve accurate control and measurement. And finally, the sample is transferred to the kinematic viscometer for detection through the suction pump.

Description

Technical Field

[0001] This application relates to the field of kinematic viscosity determination, and in particular to an apparatus for measuring sample aspiration in a capillary tube. Background Technology

[0002] Capillary tubes are the primary instrument for determining the kinematic viscosity of viscous petroleum asphalt, liquid petroleum asphalt and its distillation residues, asphalt rejuvenators, lubricating oils, etc. Currently, accurate control of the required sample volume during testing is crucial. Clamps are needed to hold the rubber tubing in place to maintain a stable sample level within the viscometer. When measuring highly viscous samples, high preheating temperatures are necessary, requiring the use of a harder rubber tubing. Otherwise, severe deformation of the tubing during sample aspiration can prevent sample intake. Furthermore, a hard rubber tubing is prone to leakage when sealed with clamps, further compromising the stability of the sample level within the viscometer.

[0003] The related technology, disclosed in CN221224337U, describes a device for sample aspiration in a capillary tube for determining kinematic viscosity. The device includes a pump body for aspirating the sample, a first rubber tube, a second rubber tube, and a third rubber tube. It also includes a first valve body installed on top of the pump body for adjusting the required pressure. A pressure gauge for measuring the pressure inside the tubes is connected between the first and second rubber tubes. This invention incorporates multiple control valves, allowing the operator to accurately stop sample aspiration after aspiration is complete, ensuring that the amount of sample entering the viscometer is neither too much nor too little, reducing repetitive operations caused by insufficient sample quantity. Furthermore, the valves improve the airtightness of the device, maintaining a constant liquid level in the viscometer. The device also facilitates control of the aspiration rate, allowing the operator to determine the time it takes for the viscometer bulb to fully fill with the sample.

[0004] Regarding the capillary sample aspiration device for determining kinematic viscosity in the aforementioned technologies, the inventors discovered that during the aspiration of asphalt samples, due to the high density of the asphalt sample, existing rubber suction heads are prone to bending or even detachment. Because of their soft material, rubber suction heads are not only easily bent and deformed when encountering dense asphalt, but may also completely detach from the sample surface, significantly reducing the efficiency of the aspiration process. This not only affects the accuracy of the test but also wastes time and resources, reducing work efficiency. Utility Model Content

[0005] To address the issue that current capillary suction devices for measuring kinematic viscosity suffer from inherent design limitations, particularly when suctioning asphalt samples, the existing rubber suction heads are prone to bending or even detachment due to the high density of asphalt. Because of their soft material, rubber suction heads are not only easily bent and deformed when encountering dense asphalt, but may also completely detach from the sample surface, significantly reducing suction efficiency. This not only affects the accuracy of the test but also wastes time and resources, reducing work efficiency. Therefore, this application provides a capillary suction device for measuring kinematic viscosity.

[0006] The device for measuring kinematic viscosity by capillary sample aspiration provided in this application adopts the following technical solution: it includes an asphalt sample bucket, a support for supporting the asphalt sample bucket, a rubber suction head for aspirating the asphalt sample from the asphalt sample bucket, a load-bearing sleeve disposed around the rubber suction head, a kinematic viscometer connected to the other end of the rubber suction head, a heat insulation component disposed around the kinematic viscometer, a first connecting pipe connected to the other end of the kinematic viscometer, a second connecting pipe connected to the first connecting pipe, a control valve and pressure disposed between the first and second connecting pipes, and a suction pump disposed at the other end of the second connecting pipe.

[0007] The support structure provides a stable temperature environment, the rubber suction head picks up the sample, the load-bearing sleeve ensures the safety of the suction process, the insulation component ensures a constant temperature, the control valve and pressure gauge enable precise control and measurement, and finally the sample is transferred to the kinematic viscometer for testing via the suction pump.

[0008] As a preferred embodiment, the support includes a support base and a heating ring disposed on the upper end face of the support base. The heating ring is circumferentially arranged with the center of the asphalt sample barrel as the center point, and the inner wall of the heating ring is tangent to the outer periphery of the asphalt sample barrel.

[0009] By adopting the above technical solution, the heating ring generates heat after being energized. The heat is conducted and convected through the close contact between its inner wall and the outer periphery of the asphalt sample barrel, so that the sample temperature in the asphalt sample barrel reaches and is maintained at a temperature within the set range, thereby meeting the requirements of different asphalt testing conditions.

[0010] As a preferred embodiment, the heating ring is configured as an electric heating ring plate, and the heating temperature is set to 130℃-135℃.

[0011] By adopting the above technical solution, the heating ring operates within a temperature range of 130℃-135℃, which can effectively heat the sample in the asphalt sample bucket to achieve the required test temperature.

[0012] As a preferred embodiment, the load-bearing protective sleeve includes a protective sleeve disposed on the rubber suction head and a protective bushing disposed at the end of the rubber suction head connected to the kinematic viscometer, wherein the protective bushing and the protective sleeve are integrally formed.

[0013] By adopting the above technical solution, the protective sleeve is fixed to the rubber suction head to ensure that the rubber suction head will not be damaged due to load or collision when sucking up asphalt samples; the protective bushing is integrally formed with the protective sleeve and fits tightly with the connection position between the rubber suction head and the kinematic viscometer to prevent the rubber suction head from falling off the connection or being accidentally damaged during the suction process.

[0014] As a preferred embodiment, the heat insulation component includes a heating shell disposed on the periphery of the kinematic viscometer, an observation window disposed on one side of the heating shell, a transparent protective plate disposed on the observation window, and an operating handle disposed on the periphery of the heating shell, wherein heat insulation rock wool is disposed inside the heating shell.

[0015] By employing the above technical solution, a heating shell is used to surround the kinematic viscometer, maintaining it at a suitable operating temperature and preventing temperature drops from affecting the test results. The operating handle is designed for easy user movement and use of the component, providing a convenient operating experience.

[0016] As a preferred embodiment, the transparent protective plate is made of high-temperature resistant glass.

[0017] By adopting the above technical solution, the observation window allows staff to clearly observe the flow of asphalt samples within the kinematic viscometer, ensuring a transparent and easily monitored testing environment. The transparent protective plate, made of high-temperature resistant glass, not only improves the clarity of observation but also enhances the overall structure's heat resistance, ensuring safe operation of the equipment under high-temperature conditions.

[0018] As a preferred embodiment, the control valve is configured as a metering valve, and the signal output terminal of the metering valve is electrically connected to the signal input terminal of the pressure gauge.

[0019] By adopting the above technical solution, the control valve acts as a metering valve to precisely control the amount of asphalt sample flowing into the first and second connecting pipes. The pressure gauge receives the signal output from the metering valve through its signal input terminal, thus enabling it to start pressure detection immediately after the metering valve completes feeding. In this way, a close linkage mechanism is formed between the metering valve and the pressure gauge. The metering valve not only accurately controls the feeding amount but also quickly transmits the signal indicating completion of feeding, allowing the pressure gauge to start working promptly. This effectively improves the efficiency and accuracy of asphalt sample pressure detection, thereby simplifying the operation process and increasing work efficiency.

[0020] In summary, this application includes the following beneficial technical effects:

[0021] 1. The asphalt sample container is used to hold asphalt samples and is supported by a support structure, and the temperature is kept constant by a heating ring embedded in the support structure;

[0022] 2. The rubber suction head is connected to the asphalt sample container, making it easy to reach deep into the container to draw up the asphalt sample, while the load-bearing sleeve protects the rubber suction head from falling or being damaged during the drawing process.

[0023] 3. The kinematic viscometer is used to measure the viscosity of asphalt. The insulation component can maintain a stable internal temperature of the kinematic viscometer, reduce the temperature change of the asphalt sample during the measurement process, and improve the measurement accuracy.

[0024] 4. Control valves and pressure gauges are used to precisely control the amount of asphalt sample entering the first and second connecting pipes, ensuring that the pressure gauges can accurately measure the viscosity of the asphalt sample during the test. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the device for measuring the sample aspiration in the capillary tube in this application;

[0026] Figure 2 This is a schematic diagram of the load-bearing sheath in the capillary device for determining kinematic viscosity in this application.

[0027] Figure 3 This is a schematic diagram of the support structure in the device for measuring kinematic viscosity in the capillary tube of this application.

[0028] Figure 4 This is a schematic diagram of the heat-insulating component in the device for measuring the kinematic viscosity of the sample in the capillary tube.

[0029] Explanation of reference numerals in the attached drawings: 100, Asphalt sample bucket; 11, Support base; 12, Heating ring; 21, Rubber suction head; 22, Kinematic viscometer; 23, First connecting pipe; 24, Second connecting pipe; 241, Suction pump; 3, Control valve; 4, Pressure gauge; 5, Load-bearing sleeve; 51, Protective sleeve; 511, Protective bushing; 6, Thermal insulation component; 61, Heating shell; 62, Observation window; 621, Transparent protective plate; 63, Operating handle. Detailed Implementation

[0030] The present application will be further described in detail below with reference to the accompanying drawings.

[0031] Please see Figures 1 to 4This application discloses an apparatus for measuring the kinematic viscosity of a sample taken from a capillary tube. It includes an asphalt sample container 100, a support for supporting the asphalt sample container 100, a rubber suction head 21 for drawing asphalt samples from the container, a load-bearing sleeve 5 around the rubber suction head 21, a kinematic viscometer 22 connected to the other end of the rubber suction head 21, a heat insulation component 6 around the kinematic viscometer 22, a first connecting pipe 23 connected to the other end of the kinematic viscometer 22, a second connecting pipe 24 connected to the first connecting pipe 23, a control valve 3 and a pressure gauge 4 located between the first and second connecting pipes 23 and 24, and a suction pump 7 located at the other end of the second connecting pipe 24. In this invention, the support provides a stable temperature environment, the rubber suction head 21 draws the sample, the load-bearing sleeve 5 ensures safety during the drawing process, the heat insulation component 6 ensures a constant temperature, the control valve 3 and pressure gauge 4 achieve precise control and measurement, and finally, the suction pump 7 transfers the sample to the kinematic viscometer 22 for testing.

[0032] Please refer to details. Figure 1 , Figure 2 , Figure 3 and Figure 4 An apparatus for measuring the kinematic viscosity of a sample drawn from a capillary includes an asphalt sample container 100 and a support for supporting the asphalt sample container 100. The support includes a support base 11 and a heating ring 12 disposed on the upper end face of the support base. The heating ring 12 is circumferentially arranged with the center of the asphalt sample container 100 as the center point, and the inner wall of the heating ring 12 is tangential to the outer circumference of the asphalt sample container 100. When the heating ring 12 is energized, it generates heat, which is conducted and convectively heated through the close contact between its inner wall and the outer circumference of the asphalt sample container 100. This ensures that the sample temperature inside the asphalt sample container 100 reaches and is maintained within a set temperature range, thereby meeting the requirements of different asphalt testing conditions.

[0033] Please refer to details. Figure 1 and Figure 3 The heating ring 12 is an electric heating ring 12 plate, and the heating temperature is set to 130℃-135℃. The heating ring 12 works in the temperature range of 130℃-135℃, which can effectively heat the sample in the asphalt sample bucket 100 to make it reach the required test temperature.

[0034] Please refer to details. Figure 1 and Figure 2The system includes a rubber suction head 21 for drawing asphalt samples from an asphalt test barrel, and a load-bearing protective sleeve 5 disposed around the rubber suction head 21. The load-bearing protective sleeve 5 includes a protective sleeve 51 disposed on the rubber suction head 21 and a protective bushing 511 disposed at the end where the rubber suction head 21 connects to the kinematic viscometer 22. The protective bushing 511 is integrally formed with the protective sleeve 51 and is fixed to the rubber suction head 21 to ensure that the rubber suction head 21 is not damaged due to load or collision when drawing asphalt samples. The protective bushing 511 is integrally formed with the protective sleeve 51 and fits tightly to the connection position between the rubber suction head 21 and the kinematic viscometer 22 to prevent the rubber suction head 21 from falling off the connection or being accidentally damaged during the drawing process.

[0035] Please refer to details. Figure 1 and Figure 4 The device includes a kinematic viscometer 22 connected to the other end of the rubber suction head 21, and a heat insulation component 6 disposed around the kinematic viscometer 22. The heat insulation component 6 includes a heating shell 61 disposed around the kinematic viscometer 22, an observation window 62 disposed on one side of the heating shell 61, a transparent protective plate 621 disposed on the observation window 62, and an operating handle 63 disposed around the heating shell 61. The heating shell 61 is equipped with heat-insulating rock wool. By setting the heating shell 61 to surround the kinematic viscometer 22, it is kept at a suitable operating temperature and the temperature drop is prevented from affecting the test results. The operating handle 63 is designed to facilitate user movement and use of the component, providing a convenient operating experience.

[0036] Please refer to details. Figure 4 The transparent protective plate 621 is made of high-temperature resistant glass, and the observation window 62 allows operators to clearly observe the flow of the asphalt sample within the kinematic viscometer 22, ensuring a transparent and easily monitored testing environment. The use of high-temperature resistant glass in the transparent protective plate 621 not only improves the clarity of observation but also enhances the overall heat resistance of the structure, ensuring safe operation of the equipment under high-temperature conditions.

[0037] Please refer to details. Figure 1The system includes a first connecting pipe 23 connected to the other end of the kinematic viscometer 22, a second connecting pipe 24 connected to the first connecting pipe 23, a control valve 3 and a pressure gauge 4 located between the first connecting pipe 23 and the second connecting pipe 24, and a suction pump 7 located at the other end of the second connecting pipe 24. The control valve 3 is a metering valve, and its signal output terminal is electrically connected to the signal input terminal of the pressure gauge 4. The control valve 3, as a metering valve, is used to accurately control the amount of asphalt sample flowing into the first connecting pipe 23 and the second connecting pipe 24. The pressure gauge 4 receives the signal output from the metering valve through its signal input terminal, thus enabling it to start pressure detection immediately after the metering valve completes the feeding. In this way, a close linkage mechanism is formed between the metering valve and the pressure gauge 4. The metering valve can not only accurately control the feeding amount but also quickly transmit the signal that the feeding is complete, enabling the pressure gauge 4 to start working in a timely manner. This effectively improves the efficiency and accuracy of pressure detection of asphalt samples, thereby simplifying the operation process and improving work efficiency.

[0038] The implementation principle of the device for measuring kinematic viscosity in a capillary tube according to an embodiment of this application is as follows: During use, the suction pump 7 is started, the rubber suction head 21 sucks up the sample, the load-bearing protective sleeve 5 ensures the safety of the suction process, and the kinematic viscometer 22 is surrounded by a heating shell 61 to keep it at a suitable working temperature and prevent the temperature drop from affecting the test results. The control valve 3 acts as a metering valve to accurately control the amount of asphalt sample flowing into the first connecting pipe 23 and the second connecting pipe 24. The pressure gauge 4 receives the signal output of the metering valve through its signal input terminal, so that it can start pressure detection immediately after the metering valve completes the feeding.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An apparatus for measuring the kinematic viscosity of a sample drawn up in a capillary tube, characterized in that: The device includes an asphalt sample container (100), a support for supporting the asphalt sample container (100), a rubber suction head (21) for sucking up the asphalt sample in the asphalt sample container, a load-bearing sleeve (5) disposed on the outer periphery of the rubber suction head (21), a kinematic viscometer (22) connected to the other end of the rubber suction head (21), a heat insulation component (6) disposed on the outer periphery of the kinematic viscometer (22), a first connecting pipe (23) connected to the other end of the kinematic viscometer (22), a second connecting pipe (24) connected to the first connecting pipe (23), a control valve (3) and a pressure gauge (4) disposed between the first connecting pipe (23) and the second connecting pipe (24), and a suction pump (7) disposed at the other end of the second connecting pipe (24).

2. The apparatus for measuring kinematic viscosity by sample aspiration in a capillary tube according to claim 1, characterized in that: The support includes a support base (11) and a heating ring (12) disposed on the upper end face of the support base. The heating ring (12) is circumferentially arranged with the center of the asphalt sample bucket (100) as the center point, and the inner wall of the heating ring (12) is tangent to the outer periphery of the asphalt sample bucket (100).

3. The apparatus for measuring kinematic viscosity by sample aspiration in a capillary tube according to claim 2, characterized in that: The heating ring (12) is configured as an electric heating ring (12) plate, and the heating temperature is set to 130℃-135℃.

4. The apparatus for measuring kinematic viscosity by sample aspiration in a capillary tube according to claim 3, characterized in that: The load-bearing protective sleeve (5) includes a protective sleeve (51) disposed on the rubber suction head (21) and a protective bushing (511) disposed at the end of the rubber suction head (21) connected to the kinematic viscometer (22). The protective bushing (511) and the protective sleeve (51) are integrally formed.

5. The apparatus for measuring kinematic viscosity by sample aspiration in a capillary tube according to claim 4, characterized in that: The heat preservation component (6) includes a heating shell (61) disposed on the outer periphery of the kinematic viscometer (22), an observation window (62) disposed on one side of the heating shell (61), a transparent protective plate (621) disposed on the observation window (62), and an operating handle (63) disposed on the outer periphery of the heating shell (61).

6. The apparatus for measuring kinematic viscosity by sample aspiration in a capillary tube according to claim 5, characterized in that: The transparent protective plate (621) is made of high-temperature resistant glass, and the heating shell (61) is provided with heat-insulating rock wool inside.

7. The apparatus for measuring kinematic viscosity by sample aspiration in a capillary tube according to claim 6, characterized in that: The control valve (3) is configured as a metering valve, and the signal output terminal of the metering valve is electrically connected to the signal input terminal of the pressure gauge (4).

8. The apparatus for measuring kinematic viscosity by sample aspiration in a capillary tube according to claim 7, characterized in that: The first connecting pipe (23) and the second connecting pipe (24) are designed to be of equal length, and a sealing ring is provided at the connection between the first connecting pipe (23) and the second connecting pipe (24).

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