A kinematic viscosity measuring instrument

Abstract

This utility model belongs to the field of liquid viscosity measurement technology, specifically relating to a kinematic viscosity meter, including a water bath assembly, a water circulation assembly, and a main unit. The water bath assembly includes a water bath and a top cover. The top cover is provided with a heating element, a first socket, and multiple second sockets. The heating element is used to heat the liquid in the water bath. A temperature sensor for detecting the liquid temperature is installed in the first socket. Each second socket is equipped with a viscometer for holding the liquid to be measured. The viscometer is clamped and fixed by a bracket, so that the viscometer is placed in a constant-temperature liquid. The water circulation assembly is used to dynamically circulate the liquid in the water bath. The main unit is provided with a computer control system and a base for placing the water bath. The computer control system is used to control the heating element to heat the liquid in the water bath and to record the flow time of the liquid to be measured in each viscometer. The water bath has uniform temperature, fast temperature control response, high viscosity measurement accuracy, supports multi-channel parallel detection, and has high detection efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of liquid viscosity measurement technology, specifically relating to a kinematic viscosity meter. Background Technology

[0002] In the fields of petroleum, chemical and lubricating oil, kinematic viscosity is an important indicator for measuring the flow properties of liquids. Traditionally, kinematic viscosity is usually measured manually by timing the flow time of the liquid in a glass capillary viscometer and then calculating the kinematic viscosity based on the capillary constant of the viscometer. However, this method has disadvantages such as cumbersome operation, low accuracy and susceptibility to human factors, and cannot meet the needs of modern industrial production for fast, accurate and automated viscosity measurement.

[0003] The utility model patent with patent number CN206920280U discloses a kinematic viscosity meter, which can simplify operation and improve measurement accuracy to a certain extent, but still has the following disadvantages: When using this meter, it relies on a motor to drive the stirring paddle to rotate in the center of the water bath, which not only makes it difficult to eliminate the vertical temperature difference and the temperature difference between the center and the edge of the water bath, but the eddies generated by mechanical vibration may also cause the sample flow in the viscometer to be unstable, affecting the test results; and the meter can only support the testing of a single viscometer at a time, resulting in low testing efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a kinematic viscosity meter to at least solve the problems in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A kinematic viscosity meter includes a water bath assembly, a water circulation assembly, and a main unit. The water bath assembly includes a water bath for holding a constant-temperature liquid. The top of the water bath has a removable cover, and the cover has a heating element, a first socket, and multiple second sockets. The heating element is used to heat the liquid in the water bath. A temperature sensor is detachably installed in the first socket for detecting the temperature of the liquid in the water bath. A viscometer for holding the liquid to be tested is detachably installed in each of the second sockets. The viscometer is clamped and fixed by a bracket, so that the viscometer is placed in the constant-temperature liquid in the water bath. The water circulation assembly is used to dynamically circulate the liquid in the water bath. The main unit has a computer control system and a base for placing the water bath. The computer control system is used to control the heating element to heat the liquid in the water bath according to the temperature of the temperature sensor, and to record the flow time of the liquid to be tested in each viscometer.

[0007] Preferably, the computer control system includes a human-machine interaction module, a timing control module, a temperature control module, a data storage module, and a data processing module; the human-machine interaction module includes a touch screen, which is used to receive and display menus, parameter settings, and test interfaces; the timing control module is used to record the flow time of the liquid in each viscometer; the temperature control module is used to control the heating element to heat the liquid in the water bath according to the temperature detected by the temperature sensor; the data storage module is used to save the test records; and the data processing module is used to calculate the average time and kinematic viscosity based on multiple timing results.

[0008] Preferably, the bathtub includes an inner cylinder and an outer cylinder arranged concentrically. The wall height of the inner cylinder is lower than that of the outer cylinder. An annular water collection trough is formed between the inner and outer cylinders. The bottom of the water collection trough is provided with an outlet, and the bottom of the inner cylinder is provided with an inlet. The water circulation component includes a circulation pump. The inlet of the circulation pump is connected to the outlet of the water collection trough through a water pipe, and the outlet of the circulation pump is connected to the inlet of the inner cylinder through a water pipe. The circulation pump is electrically connected to a temperature control module. The temperature control module controls the operation of the circulation pump according to the constant temperature requirement. The circulation pump re-transports the liquid overflowing into the water collection trough back into the inner cylinder, realizing dynamic circulation of the liquid in the bathtub.

[0009] Preferably, the top cover is provided with a plurality of first magnets around each second insertion hole, the bottom of the bracket is fixed with a base, and a plurality of second magnets corresponding to the polarity of the first magnets are evenly distributed along the circumference of the base. The base is fixed to the top cover by magnetic attraction between the first magnets and the second magnets.

[0010] Preferably, the top wall of the inner cylinder is provided with a serrated overflow weir.

[0011] Preferably, the top cover is also provided with a third socket, in which a thermometer can be detachably installed.

[0012] Preferably, the host computer is equipped with a printer electrically connected to the computer control system, and the computer control system further includes a print control module for controlling the printer to print test results.

[0013] Preferably, the host is equipped with a cooling fan to prevent overheating.

[0014] Preferably, the host is equipped with a fuse box for overload protection.

[0015] Preferably, the top cover is provided with four second insertion holes.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects:

[0017] 1. This utility model replaces the traditional stirring paddle structure with a water circulation component. The liquid overflowing into the water collection tank is transported back to the inner cylinder by a circulation pump, realizing dynamic circulation. This effectively eliminates temperature stratification and avoids the influence of eddies generated by stirring on sample flow. The sawtooth overflow weir ensures uniform liquid overflow, reduces turbulence, and improves the stability of constant temperature. Through the cooperation of the computer control system, heating element, temperature sensor, and circulation pump, closed-loop control of water bath temperature can be achieved, making the liquid temperature in the water bath uniform, with fast temperature control response, and effectively improving the accuracy of viscosity measurement.

[0018] 2. This utility model can install multiple viscometers simultaneously, supports multi-channel parallel detection, and automatically records flow time and average viscosity through a computer control system, directly outputting test results. This not only effectively improves detection efficiency but also reduces errors from manual recording.

[0019] 3. By setting a first magnet and a second magnet on the top cover and the base, this utility model enables the viscometer to be quickly disassembled / installed, avoiding the risk of slippage and making operation convenient and quick. Attached Figure Description

[0020] Figure 1 This is a front view of the present invention;

[0021] Figure 2 This is a rear view of the present invention;

[0022] Figure 3 This is a top view of the top cover of this utility model;

[0023] Figure 4 This is a schematic diagram of the viscometer structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the viscometer clamping device of this utility model;

[0025] Figure 6 This is a schematic diagram of the external circulating pump structure of this utility model.

[0026] In the picture:

[0027] Bathtub 1, Inner cylinder 11, Outer cylinder 12, Overflow weir 13, Water collection tank 14, Top cover 2, Heating control box 21, First socket 22, Second socket 23, Third socket 24, First magnet 25, Temperature sensor 3, Viscometer 4, Pipe body 41, First expansion section 42, Second expansion section 43, Branch pipe 44, Bracket 5, Base 6, Circulation pump 7, Water pipe 71, Main unit 8, Base 81, Touch screen 82, Printer 83, Cooling fan 84, Fuse box 85. Detailed Implementation

[0028] The following detailed description illustrates the specific implementation method:

[0029] Example

[0030] like Figures 1-3 As shown, a kinematic viscosity meter includes a water bath assembly, a water circulation assembly, and a main unit 8.

[0031] like Figure 1 As shown, the water bath assembly includes a water bath 1 for holding a constant-temperature liquid. The water bath 1 includes an inner cylinder and an outer cylinder 12 arranged concentrically. The height of the inner cylinder 11 wall is lower than that of the outer cylinder 12. The top wall of the inner cylinder 11 is provided with a sawtooth overflow weir 13. An annular water collection trough 14 is formed between the inner cylinder 11 and the outer cylinder 12. The bottom of the water collection trough 14 is provided with a water outlet, and the bottom of the inner cylinder 11 is provided with a water inlet. The sawtooth overflow weir 13 can ensure uniform liquid overflow, reduce turbulence, and improve the stability of the constant-temperature water bath.

[0032] like Figure 1-5 As shown, the top of the bathtub 1 is equipped with a removable top cover 2. The top cover 2 has a heating control box 21, a first socket 22, four second sockets 23, and a third socket 24. The heating control box 21 is connected to a heating element, which is placed in the liquid in the bathtub 1 to heat the liquid. Temperature sensors 3 and thermometers are detachably installed in the first socket 22 and the third socket 24, respectively. Both the temperature sensors 3 and the thermometers are used to detect the temperature of the liquid in the bathtub 1. The probe of the temperature sensor 3 and the glass bulb of the thermometer are close to the water inlet of the inner cylinder 11. A viscometer 4 for holding the liquid to be tested is detachably installed in the second socket 23. The viscometer 4 is clamped and fixed by the bracket 5, so that the viscometer 4 is placed in the constant temperature liquid in the water bath 1. Three first magnets 25 are arranged around each second socket 23 on the top cover 2. A base 6 is fixed at the bottom of the bracket 5. Three second magnets with the polarity corresponding to the first magnets 25 are evenly distributed around the base 6. The base 6 is fixed to the top cover 2 by the magnetic attraction of the first magnets 25 and the second magnets, so as to realize the quick disassembly / installation of the viscometer 4, avoid the risk of slipping, and make the operation convenient and quick.

[0033] like Figure 1 As shown, the water circulation assembly is used to dynamically circulate the liquid in the water bath 1. The water circulation assembly includes a circulation pump 7. The inlet of the circulation pump 7 is connected to the outlet of the water collection tank 14 through a water pipe 71, and the outlet of the circulation pump 7 is connected to the inlet of the inner cylinder 11 through a water pipe 71. The circulation pump 7 can transport the liquid overflowing into the water collection tank 14 back to the inner cylinder 11, realizing the dynamic circulation of the liquid in the water bath 1. This can effectively eliminate temperature stratification. The liquid enters the inner cylinder 11 slowly from the bottom, effectively avoiding the influence of eddies on the sample flow.

[0034] like Figure 1-2As shown, the host 8 is equipped with a base 81, a printer 83, a cooling fan 84, a fuse box 85, and a computer control system. The base 81 is used to place the bathtub 1. The printer 83 and the cooling fan 84 are electrically connected to the computer control system. The cooling fan 84 is used to prevent overheating, and the fuse box 85 is used for overload protection.

[0035] The computer control system includes a human-computer interaction module, a timing control module, a temperature control module, a printing control module, a data storage module, and a data processing module; such as Figure 1 As shown, the human-machine interface module includes a touch screen 82, which receives and displays menus, parameter settings, and test interfaces; a timing control module, which records the flow time of the liquid in each viscometer 4; a temperature control module, which controls the heating element to heat the liquid in the water bath 1 based on the temperature detected by the temperature sensor 3, and is electrically connected to the circulation pump 7 of the water circulation component, controlling the operation of the circulation pump 7 according to the constant temperature requirement; a printing control module, which controls the printer 83 to print the test results; a data storage module, which saves the test records; and a data processing module, which calculates the average time and kinematic viscosity based on multiple timing results.

[0036] The water circulation component can be installed inside the base 81 of the main unit 8 (e.g., Figure 1 It can also be installed externally (e.g., Figure 6 ).

[0037] The specific implementation is as follows:

[0038] 1. Pretreatment

[0039] The sample is dehydrated and impurities are filtered out; the viscometer 4 is cleaned and dried with petroleum ether / chromic acid cleaning solution; a constant temperature liquid is selected according to the test temperature and injected into the water bath 1 (water: 20–50℃; glycerol / mineral oil: 50–100℃).

[0040] 2. Sample preparation and installation

[0041] Invert the viscometer 4 to draw the sample to mark b (avoid air bubbles), wipe the tube wall clean, and move the rubber tube from the branch tube 44 to the tube body 41; fix the viscometer 4 vertically to the top of the water bath 1 through the bracket 5 and the base 6, so that the first expansion part 42 is half immersed in the constant temperature liquid.

[0042] 3. Instrument Setup

[0043] Connect the main unit 8 to the control box cable, and set the constant temperature, viscometer 4 parameters (pipe diameter / constant), and number of timing cycles through the human-machine interface.

[0044] 4. Testing

[0045] Click "Temperature Control". The temperature control module controls the heating element to heat up to the set value. Use a rubber tube to draw the sample into the second expansion section 43 until it is slightly above mark a, avoiding air bubbles. Start the stopwatch when the liquid level reaches mark a and stop when it reaches mark b. Repeat the test. If it meets the national standard requirements (at 15-100℃, the difference between each timing time and the arithmetic mean does not exceed ±0.5%), the average value will be calculated and the kinematic viscosity value will be displayed. If it does not meet the requirements, a prompt to retest will be given. Usually, the timing value is taken 4 times. If more than 3 tests are taken, the calculation result of the value exceeding the tolerance is discarded. The 4 tests with 4 viscometers do not affect each other and can be started sequentially.

[0046] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and 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 should 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 kinematic viscosity meter, characterized in that: The system includes a water bath assembly, a water circulation assembly, and a main unit (8). The water bath assembly includes a water bath (1) for holding a constant-temperature liquid. The top of the water bath (1) is provided with a removable top cover (2). The top cover (2) is provided with a heating element, a first socket (22), and multiple second sockets (23). The heating element is used to heat the liquid in the water bath (1). A temperature sensor (3) is detachably installed in the first socket (22). The temperature sensor (3) is used to detect the temperature of the liquid in the water bath (1). Each of the second sockets (23) is detachably installed with... There is a viscometer (4) for holding the liquid to be tested. The viscometer (4) is clamped and fixed by a bracket (5) so that the viscometer (4) is placed in the constant temperature liquid in the water bath (1). The water circulation component is used to dynamically circulate the liquid in the water bath (1). The main unit (8) is equipped with a computer control system and a base (81) for placing the water bath (1). The computer control system is used to control the heating element to heat the liquid in the water bath (1) according to the temperature of the temperature sensor (3), and to record the flow time of the liquid to be tested in each viscometer (4).

2. The kinematic viscosity meter according to claim 1, characterized in that: The computer control system includes a human-computer interaction module, a timing control module, a temperature control module, a data storage module, and a data processing module; the human-computer interaction module includes a touch screen (82), which is used to receive and display menus, parameter settings, and test interfaces; the timing control module is used to record the flow time of the liquid in each viscometer (4); the temperature control module is used to control the heating element to heat the liquid in the water bath (1) according to the temperature detected by the temperature sensor (3); the data storage module is used to save test records; The data processing module is used to calculate the average time and kinematic viscosity based on multiple timing results.

3. The kinematic viscosity meter according to claim 1 or 2, characterized in that: The bathtub (1) includes an inner cylinder and an outer cylinder (12) arranged concentrically. The wall height of the inner cylinder (11) is lower than that of the outer cylinder (12). An annular water collection trough (14) is formed between the inner cylinder (11) and the outer cylinder (12). The bottom of the water collection trough (14) is provided with an outlet, and the bottom of the inner cylinder (11) is provided with an inlet. The water circulation component includes a circulation pump (7). The inlet of the circulation pump (7) is connected to the outlet of the water collection trough (14) through a water pipe (71), and the outlet of the circulation pump (7) is connected to the inlet of the inner cylinder (11) through a water pipe (71). The circulation pump (7) is electrically connected to the temperature control module. The temperature control module controls the operation of the circulation pump (7) according to the constant temperature requirement. The circulation pump (7) transports the liquid overflowing into the water collection trough (14) back to the inner cylinder (11) to realize the dynamic circulation of liquid in the bathtub (1).

4. The kinematic viscosity meter according to claim 3, characterized in that: The top cover (2) is provided with a plurality of first magnets around each second insertion hole (23). The bottom of the bracket (5) is fixed with a base (6). A plurality of second magnets corresponding to the polarity of the first magnets are evenly distributed along the circumference of the base (6). The base (6) is fixed to the top cover (2) by magnetic attraction between the first magnets and the second magnets.

5. The kinematic viscosity meter according to claim 4, characterized in that: The top wall of the inner cylinder (11) is provided with a sawtooth-shaped overflow weir (13).

6. The kinematic viscosity meter according to claim 4, characterized in that: The top cover (2) is also provided with a third socket (24), and a thermometer can be detachably installed in the third socket (24).

7. The kinematic viscosity meter according to claim 4, characterized in that: The host (8) is equipped with a printer (83) that is electrically connected to the computer control system. The computer control system also includes a print control module, which is used to control the printer (83) to print test results.

8. The kinematic viscosity meter according to claim 4, characterized in that: The host (8) is equipped with a cooling fan (84) to prevent overheating.

9. The kinematic viscosity meter according to claim 4, characterized in that: The host (8) is equipped with a fuse box (85) for overload protection.

10. The kinematic viscosity meter according to claim 4, characterized in that: The top cover (2) is provided with four second insertion holes (23).

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