TWI847852B - Flow guiding device of viscometer and viscosity detection method - Google Patents

Abstract

The present invention is related to a flow guide device and viscosity detection method of a viscometer, which can solve the problems of the existing viscometers that are complicated in structure, inconvenient to carry and operate. It includes: connecting a first container and a second container of a flow guide device body to two opposite sides of a flow guide cover, and filling a fluid in the first container or the second container, so that when the first container or the second container is inverted, the fluid flows from a first flow guide surface to a first flow guide hole and then flows to the second container, or the fluid flows from a second flow guide surface to a second flow guide hole and then flows to the first container, and a timer is used to measure a time parameter of the fluid flow process and then substitute it into a viscosity formula for calculation to obtain a viscosity value of the fluid. In this way, the present invention has the effect of simple structure and easy operation.

Description

Viscometer flow guide device and viscosity detection method

The present invention relates to a flow guide device for a viscometer and a method for detecting viscosity, particularly to an invention in which a first container and a second container are connected to opposite sides of a flow guide cover, and a fluid is contained in the first container so that the fluid can flow from the first container through the flow guide cover and then flow into the second container, or a fluid is contained in the second container so that the fluid can flow from the second container through the flow guide cover and then flow into the first container, and a timer is used to obtain time parameters to detect the viscosity value of the fluid.

In the operation of machinery, it is inevitable to use oil for lubrication, and the viscosity of the oil is the key to affecting the starting performance, wear degree and working efficiency of the machinery. Therefore, whether it is a car, a motorcycle or a machine, the viscosity of the oil added is very important. By testing the viscosity of the oil, it can also be known whether the oil currently used is conducive to the operation of the machinery or aggravates the wear of the machinery. The existing viscosity tester has the advantage of quickly and accurately measuring the viscosity of the fluid, but it has the disadvantage of being large and difficult to carry, and even expensive. It is probably difficult for ordinary people and even small and medium-sized enterprises to own it.

In view of this, the existence of simple viscometers has benefited many people and enterprises that need to regularly test the viscosity of oil products. For example, Patent Publication No. CN109357970B of the People's Republic of China proposes an outflow viscometer, including an outflow container, a receiving container and a bracket. The outflow container is supported on the upper side of the receiving container by the bracket. The outflow container has an outflow hole facing the receiving container. Before the fluid is poured into the outflow container, the outflow hole must be blocked by the user's hand to prevent the fluid from flowing out directly after being poured into the outflow container. The user can only release his hand after the outflow container is filled with the fluid, so that the fluid flows from the outflow hole to the receiving container, and the time required for the fluid to reach the specified capacity is calculated to detect the viscosity value of the fluid. Or, for example, Patent Publication No. CN213301946U of the People's Republic of China sets a switch cover on the above-mentioned outflow hole. Before pouring the fluid into the outflow container, the switch cover is first used to close the outflow hole. After the filling is completed, the switch cover is opened to allow the fluid to flow out of the outflow hole. At this time, when an infrared sensor senses the outflow of the fluid, it sends a signal to a controller to start timing until the fluid flows out to a specified volume and then stops timing. The controller will record the time and detect the viscosity value of the fluid.

Although the volume of the viscometers in the above two patents is much smaller than that of the existing viscosity tester, the bracket is still required to support the outflow container so that the fluid can flow out smoothly downwards. Even before pouring the fluid, the operator must remember to close the outflow hole by hand or with the switch cover. Otherwise, the operator will pour the fluid into the outflow container while the fluid flows out of the outflow hole, and the viscosity value of the fluid cannot be measured. Therefore, the existing viscometer still has the disadvantages of complex structure, inconvenience in carrying and inconvenience in operation.

Therefore, in order to make the equipment for detecting fluid have a simple and lightweight structure and easy operation, the inventor proposes a flow guide device for a viscometer, including:

A flow guide device body comprises a first container, a second container and a flow guide cover, wherein the first container has a first opening, the second container has a second opening, the flow guide cover has a first connecting portion and a second connecting portion on two opposite sides, the first connecting portion is connected to the first opening, and the second connecting portion is connected to the second opening, so that the first container and the second container are connected to the opposite sides of the flow guide cover; the flow guide cover has a first flow guide surface and a second flow guide surface The first guide surface and the second guide surface are respectively facing the first container and the second container; a first guide hole is provided on the first guide surface, the first guide surface faces the first guide hole, and gradually increases the distance from the first connecting portion to present an inclined shape, and the first guide hole passes through the second guide surface from the first guide surface and extends a first guide tube toward the second connecting portion; a second guide hole is provided on the second guide surface, the second guide surface faces the second connecting portion. The direction of the guide hole gradually increases the distance from the second connecting portion and presents an inclined shape, and the second guide hole penetrates the first guide surface from the second guide surface and extends a second guide tube toward the first connecting portion; a fluid is contained in the first container, and the first container is inverted, so that the fluid flows from the first container through the first opening portion and then through the first guide surface to the first guide hole, and then flows out of the guide cover along the first guide tube to reach the second container, at this time A gas in the second container will be output from the second flow guide hole along the second flow guide tube to the first container; or, the fluid is contained in the second container, and the second container is inverted, so that the fluid flows from the second container through the second opening and then through the second flow guide surface to the second flow guide hole, and then flows out of the flow guide cover along the second flow guide tube to reach the first container. At this time, the gas in the first container will be output from the first flow guide hole along the first flow guide tube to the second container.

Furthermore, the first container and the second container are both made of transparent materials, and a first thermometer is installed on the first flow guide surface, and the first thermometer extends from the flow guide cover into the interior of the first container, and a second thermometer is installed on the second flow guide surface, and the second thermometer extends from the flow guide cover into the interior of the second container.

Wherein, a first convex column extending toward the first connecting portion is provided on the first guide surface, a first fixed tube is sleeved on the first convex column, one end of the first thermometer is correspondingly embedded in the first fixed tube, and the other end of the first thermometer is a first measuring end; a second convex column extending toward the second connecting portion is provided on the second guide surface, a second fixed tube is sleeved on the second convex column, one end of the second thermometer is correspondingly embedded in the second fixed tube, and the other end of the second thermometer is a second measuring end.

Furthermore, the first container and the second container are both made of transparent materials, and a first scale mark is provided on the first container, and a second scale mark is provided on the second container.

Furthermore, a first funnel groove is concavely formed on the first guide surface and gradually shrinks toward the first guide hole, and a second funnel groove is concavely formed on the second guide surface and gradually shrinks toward the second guide hole.

Furthermore, at least one first protrusion is provided on the inner wall of the first connecting portion, and the first protrusion is screwed into the thread of the first opening portion; at least one second protrusion is provided on the inner wall of the second connecting portion, and the second protrusion is screwed into the thread of the second opening portion.

Furthermore, the first connecting portion is concave in the direction of the first guide surface until a first stop surface is formed in front of the first guide surface; the second connecting portion is concave in the direction of the second guide surface until a second stop surface is formed in front of the second guide surface.

Furthermore, a first leak-proof ring is disposed between the first opening and the first stop surface; and a second leak-proof ring is disposed between the second opening and the second stop surface.

The inventors of the present invention have also proposed a method for performing viscosity testing using the flow guide device of the viscometer, which is implemented in conjunction with a timer, and the steps include: placing the fluid in the first container; inverting the first container so that the fluid flows from the first container through the first opening and then through the first flow guide surface to the first flow guide hole; starting the timer when the fluid flows out along the first flow guide tube; stopping the timer when the fluid flows from the first container through the flow guide cover to the second container and reaches a specified capacity, and replacing a time parameter measured by the timer with a time parameter measured by the timer. Enter a viscosity formula to calculate and obtain a viscosity value of the fluid; or place the fluid in the second container; invert the second container so that the fluid flows from the second container through the second opening and then through the second guide surface to the second guide hole; start the timer when the fluid flows out along the second guide tube; stop the timer when the fluid flows from the second container through the guide cover to the first container and reaches the specified capacity, and substitute the time parameter measured by the timer into the viscosity formula for calculation to obtain the viscosity value of the fluid.

Furthermore, the flow guide device detects the viscosity values of different fluids, and then outputs the viscosity values of the fluids and the measured time parameters into a comparison table.

According to the above technical features, the present invention can achieve the following effects:

1. The first container and the second container are connected by a flow guide cover, and the flow guide cover has a first flow guide hole and a second flow guide hole. The fluid is placed in the first container, and then the first container is inverted, so that the fluid flows from the first container through the first flow guide hole of the flow guide cover and then flows to the second container. At this time, the gas in the second container will be squeezed by the fluid and flow along the second flow guide hole to the first container, thereby generating air convection so that the fluid flows smoothly from the first container to the second container, and vice versa. Operators of any age can use the flow guide device and viscosity detection method of the viscometer of the present invention to perform fluid viscosity value detection at any place with a timer. Therefore, the present invention has the functions of simple structure, convenient carrying and easy operation.

2. By embedding the first thermometer and the second thermometer into the first fixed tube and the second fixed tube respectively, and then sleeve the first fixed tube and the second fixed tube on the first convex column of the first guide surface and the second convex column of the second guide surface respectively, since the first container and the second container are both transparent materials, the temperature of the air and the temperature of the fluid can be obtained by the first thermometer and the second thermometer at the same time, making the detection of the fluid viscosity value more valuable for reference.

3. Draw the first scale mark and the second scale mark on the first container and the second container of transparent material respectively, so that the operator can use the first scale mark or the second scale mark as the basis for stopping the timing when performing fluid viscosity detection, without having to wait until the fluid is completely drained before stopping the timing. Even when you want to compare the viscosity values of multiple different fluids, you can also use the first scale mark or the second scale mark as a fair standard for stopping the timing.

4. The first funnel groove and the second funnel groove allow the fluid to flow more smoothly along the expected path when it flows from the first container to the second container or from the second container to the first container.

5. A first protrusion and a second protrusion are respectively provided on the inner wall of the first connecting part and the inner wall of the second connecting part of the flow guide cover, so that the first container and the second container can be respectively connected to the opposite sides of the flow guide cover by screwing.

6. The first stop surface and the second stop surface are set to effectively prevent the first container and the second container from being over-stuck when connected to the flow guide cover, thereby causing damage to the first flow guide surface and the second flow guide surface.

7. A first leak-proof ring is provided between the first stop surface of the flow guide cover and the first opening of the first container, and a second leak-proof ring is provided between the second stop surface of the flow guide cover and the second opening of the second container, so that the fluid will not leak out of the flow guide device body during the viscosity test, and the operator can be prevented from contacting the chemical fluid leaking from the inside to the outside when taking the flow guide device body, causing the hand to be corroded by the chemical fluid and injured.

8. After using the flow guide device to detect the viscosity values of different fluids, the individual viscosity values and the measured time parameters are output into a comparison table. This is convenient for re-testing the viscosity value of the fluid in the future. The time parameter measured by the timer can be used to directly query the comparison table to obtain the viscosity value of the fluid.

1: The body of the diversion device

11: First container

111: First opening

112: First scale mark

12: Second container

121: Second opening

122: Second scale mark

13: Guide cover

131: First connection part

1311: First bump

1312: First stop surface

132: Second connection part

1321: Second bump

1322: Second stop surface

133: First guide surface

1331: First diversion hole

1331U: First guide tube

1332: First funnel slot

1333: First convex column

134: Second guide surface

1341: Second diversion hole

1341U: Second guide tube

1342: Second funnel slot

1343: Second convex column

21: First fixed tube

22: Second fixed tube

31: The first thermometer

311: First measuring end

32: Second thermometer

321: Second measuring end

41: The first leak-proof ring

42: Second anti-leakage ring

5: Oil products

6: Gas

[Figure 1] is a three-dimensional assembly diagram of the flow guide device of the viscometer of the embodiment of the present invention.

[The second picture] is a 3D exploded view of the first picture.

[Figure 3] is a three-dimensional appearance diagram of the flow guide cover of the present invention.

[Figure 4] is a three-dimensional cross-section of Figure 3.

[Figure 5] is a side cross-sectional view of Figure 3.

[Figure 6] is a side cross-sectional view of the main body of the diversion device of the present invention.

[Figure 7] is a schematic diagram of the operation of the flow guide device of the viscometer of the embodiment of the present invention, where the fluid is contained in the first container.

[Figure 8] is the second schematic diagram of the operation of the flow guide device of the viscometer of the embodiment of the present invention. The first container is inverted so that the fluid flows from the first container through the flow guide cover and reaches the second container.

[Figure 9] is the third schematic diagram of the operation of the flow guide device of the viscometer of the embodiment of the present invention, where the fluid flows to the second container and reaches the specified capacity.

Combining the above technical features, the main effects of the flow guide device and viscosity detection method of the viscometer of the present invention can be clearly presented in the following embodiments.

Please refer to the first and second figures. The flow guide device of the viscometer of the present invention includes a flow guide device body 1, which includes a first container 11, a second container 12 and a flow guide cover 13. The first container 11 has a first opening 111, the second container 12 has a second opening 121, and the flow guide cover 13 has a first connecting portion 131 and a second connecting portion 132 on opposite sides. The first connecting portion 131 of the flow guide cover 13 is connected to the first opening 111 of the first container 11, and the second connecting portion 132 of the flow guide cover 13 is connected to the second opening 121 of the second container 12, so that the first container 11 and the second container 12 are connected to the opposite sides of the flow guide cover 13.

Please refer to the flow guide cover 13 disclosed in the third to fifth figures, and the flow guide device body 1 shown in the sixth figure. The flow guide cover 13 has a first flow guide surface 133 facing the first container 11, and a first flow guide hole 1331 is provided on the first flow guide surface 133. The first flow guide surface 133 is inclined in the direction of the first flow guide hole 1331, and the distance from the first connecting portion 131 gradually increases. In addition, a first funnel groove 1332 is concave on the first flow guide surface 133 and gradually shrinks in the direction of the first flow guide hole 1331, so that the fluid can flow more smoothly along the expected path. The flow guide cover 13 has a second flow guide surface 134 facing the second container 12, and a second flow guide hole 1341 is provided on the second flow guide surface 134. The second flow guide surface 134 is inclined toward the second flow guide hole 1341 and gradually increases the distance from the second connecting portion 132, and a second funnel groove 1342 is concave on the second flow guide surface 134 and gradually shrinks toward the second flow guide hole 1341, so that the fluid can flow more smoothly along the expected path. The first guide hole 1331 extends from the first guide surface 133 through the second guide surface 134 and toward the second connection portion 132 to form a first guide tube 1331U; the second guide hole 1341 extends from the second guide surface 134 through the first guide surface 133 and toward the first connection portion 131 to form a second guide tube 1341U. The first guide tube 1331U and the second guide tube 1341U are provided to effectively guide the fluid to flow smoothly.

Please refer to the second and third figures again. A first convex column 1333 extending toward the first connecting portion 131 is provided on the first guide surface 133. A first fixing tube 21 is sleeved on the first convex column 1333. One end of a first thermometer 31 is correspondingly embedded in the first fixing tube 21. The other end of the first thermometer 31 is a first measuring end 311. Thus, the first thermometer 31 can be installed on the first guide surface 133 and extend from the guide cover 13 into the first container. The second guide surface 134 is provided with a second convex column 1343 extending toward the second connecting portion 132, a second fixing tube 22 is sleeved on the second convex column 1343, and one end of a second thermometer 32 is correspondingly embedded in the second fixing tube 22, and the other end of the second thermometer 32 is a second measuring end 321, so that the second thermometer 32 can be installed on the second guide surface 134 and extend from the guide cover 13 into the interior of the second container 12. Since the first container 11 and the second container 12 are both made of transparent materials, the measurement results of the first thermometer 31 and the second thermometer 32 can be observed from the outside of the first container 11 and the second container 12, such as the temperature of the air and the temperature of the fluid, so that the detection of the fluid viscosity value is more valuable for reference. In addition, a first scale mark 112 and a second scale mark 122 are further drawn on the first container 11 and the second container 12, respectively, so that the operator can use the first scale mark 112 or the second scale mark 122 as a basis for stopping the timing when performing fluid viscosity detection, without having to wait until the fluid is completely drained before stopping the timing. Even when the viscosity values of multiple different fluids are to be compared, the first scale mark 112 or the second scale mark 122 can be used as a fair standard for stopping the timing.

Please refer to the third and sixth figures. At least one first protrusion 1311 is further provided on the inner wall of the first connecting portion 131 of the flow guide cover 13. In this embodiment, the number of the first protrusions 1311 is four, but not limited thereto. The first protrusion 1311 will be screwed with the thread of the first opening portion 111 to facilitate the connection or separation of the first container 11 and the flow guide cover 13. A second protrusion 1321 is further provided on the inner wall of the second connecting portion 132 of the flow guide cover 13. In this embodiment, the number of the second protrusions 1321 is four, but not limited thereto. The second protrusion 1321 will be screwed with the thread of the second opening portion 121 to facilitate the connection or separation of the second container 12 and the flow guide cover 13.

In order to prevent the first container 11 and the second container 12 from being over-tightened during the process of screwing the flow guide cover 13, thereby causing the first flow guide surface 133 and the second flow guide surface 134 to be damaged, the present invention further makes the first connecting portion 131 concave in the direction of the first flow guide surface 133 until a first stop surface 1312 is formed before the first flow guide surface 133, and makes the second connecting portion 132 concave in the direction of the second flow guide surface 134 until the second flow guide surface 134 A second stop surface 1322 is formed before, so that when the first container 11 and the second container 12 are combined with the flow guide cover 13, if the first opening 111 abuts against the first stop surface 1312 and the second opening 121 abuts against the second stop surface 1322, the first container 11 and the second container 12 can no longer be screwed into the flow guide cover 13, so that the first flow guide surface 133 and the second flow guide surface 134 can be fully protected.

With the first stop surface 1312 and the second stop surface 1322, a first leak-proof ring 41 can be installed between the first stop surface 1312 and the first opening 111, and a second leak-proof ring 42 can be installed between the second stop surface 1322 and the second opening 121, so that the fluid will not leak out of the diversion device body 1 during the viscosity test, and the operator can be prevented from contacting the chemical fluid leaking from the inside to the outside when picking up the diversion device body 1, resulting in the problem of hands being corroded by the chemical fluid and injured.

When using the flow guide device of the viscometer of the present invention to perform the viscosity detection method, a timer is also required to be used together. First, an oil product 5 (as shown in Figure 7) is placed in the first container 11, or water, alcohol or any fluid can be placed. The present invention is not limited here. In this embodiment, the oil product 5 is used as an example for explanation, but it is not limited to this.

Please refer to FIG. 7 first. Connect the first container 11 containing the oil product 5 to the first connecting portion 131 of the flow guide cover 13, and then connect the second container 12 to the second connecting portion 132 of the flow guide cover 13. At this time, the first container 11 is located below the second container 12, and the temperature of the oil product 5 is measured by immersing the first measuring end 311 of the first thermometer 31 in the oil product 5, and the temperature in the air is measured by the second measuring end 321 of the second thermometer 32. The operator can observe the measurement results of the first thermometer 31 and the second thermometer 32 from the outside of the first container 11 and the second container 12 made of transparent materials, and use the temperature parameters of the oil product 5 and the air as one of the reference data for viscosity detection. It should be noted that since the first scale mark 112 of the first container 11 and the second scale mark 122 of the second container 12 are at the same position, the amount of the oil product 5 initially contained in the first container 11 must be higher than the first scale mark 112, so that when the oil product 5 flows into the second container 12, the second scale mark 122 can have a reference significance and serve as a standard for stopping the timing.

Please refer to the eighth figure and the fifth and sixth figures. Then, invert the first container 11, so that the oil 5 flows from the first container 11 through the first opening 111 and then through the first guide surface 133 to the first guide hole 1331, until the oil 5 flows out along the first guide tube 1331U, start the above timer to start timing, and the oil 5 will flow out of the guide cover 13 and reach the second container 12. At this time, a gas 6 in the second container 12 will be squeezed due to the inflow of the oil 5, and flow along the second guide tube 1341U to the first container 11 in the direction of the second guide hole 1341, thereby generating air convection so that the oil 5 can flow smoothly from the first container 11 to the second container 12.

Please refer to Figure 9. After the oil product 5 flows from the first container 11 through the guide cover 13 to the second container 12 and reaches a specified capacity of the second scale mark 122, the timer can be stopped and a time parameter measured by the timer is substituted into a viscosity formula for calculation, thereby obtaining a viscosity value of the oil product 5.

On the contrary, since the following operation is the same as the above operation, the schematic diagram of the following operation is not drawn here to avoid redundant description. If the oil product 5 is initially placed in the second container 12, and then the second container 12 is inverted, so that the oil product 5 flows from the second container 12 through the second opening 121 and then through the second guide surface 134 to the second guide hole 1341, and until the oil product 5 flows out along the second guide tube 1341U, the above timer is started to start timing. When the oil product 5 flows out of the guide cover 13 and reaches the first container 11, the above gas 6 in the first container 11 will also be squeezed by the inflow of the oil product 5 and will flow toward the first guide tube 1341U. The direction of the flow hole 1331 flows along the first flow guide tube 1331U to the second container 12, thereby generating air convection so that the oil product 5 can flow smoothly from the second container 12 to the first container 11. Then, after the oil product 5 flows from the second container 12 through the flow guide cover 13 to the first container 11 and reaches the specified capacity of the first scale mark 112, the timer is stopped, and the time parameter measured by the timer can be substituted into the viscosity formula for calculation, thereby obtaining the viscosity value of the oil product 5.

It is worth mentioning that the viscosity values of various different fluids can be detected by the flow guide device body 1 in combination with the aforementioned timer, and then the viscosity values of the aforementioned fluids, the time parameter measured by the timer at that time, and the temperature value of the fluid can be outputted together into a comparison table, so that when the viscosity value of the fluid needs to be detected again in the future, the time parameter of the fluid can be measured by the timer, and the temperature value of the fluid measured by the first thermometer 31 and the second thermometer 32 can be directly checked in the above comparison table to know the viscosity value of the fluid corresponding to the time parameter and the temperature value of the fluid, thereby omitting the calculation process and effectively reducing the time and steps of fluid viscosity detection.

Please refer to Table 1, which discloses the comparison between the viscosity test method using the flow guide device of the viscometer of the present invention and the test results of the existing precision oil viscosity test instrument. This embodiment uses CPC R series super-grade circulating oil with a viscosity grade of 68 (CPC-R68) to perform viscosity value experiments at different temperatures. The error percentage of the test results of the existing precision oil viscosity test instrument and the flow guide device of the viscometer of the present invention is only between 1% and 12%, and the overall volume, structure, weight, ease of operation and even manufacturing cost are all better than the existing precision oil viscosity test instrument. Through the flow guide device and viscosity detection method of the viscometer of the present invention, operators of any age can effectively perform fluid viscosity value detection at any place with a timer. Therefore, the present invention has the advantages of simple structure, convenient carrying and easy operation.

Combined with the description of the above embodiments, the operation, use and effects of the present invention can be fully understood. However, the above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of implementation of the present invention. In other words, simple equivalent changes and modifications made according to the scope of the patent application and the content of the invention description are all within the scope of the present invention.

11: First container

12: Second container

13: Guide cover

5: Oil products

6: Gas

Claims (10)

A flow guide device for a viscometer, comprising: a flow guide device body, including a first container, a second container and a flow guide cover, wherein the first container has a first opening, the second container has a second opening, the flow guide cover has a first connecting portion and a second connecting portion on two opposite sides, the first connecting portion is connected to the first opening, and the second connecting portion is connected to the second opening, so that the first container and the second container are connected to the opposite sides of the flow guide cover; the flow guide cover has a first A guide surface and a second guide surface, the first guide surface and the second guide surface are respectively facing the first container and the second container; a first guide hole is provided on the first guide surface, the first guide surface faces the direction of the first guide hole, and gradually increases the distance from the first connecting portion to present an inclined shape, and the first guide hole passes through the second guide surface from the first guide surface and extends a first guide tube toward the second connecting portion; a second guide hole is provided on the second guide surface, and the second guide hole is provided The second guide hole is inclined with the distance from the second connecting portion gradually increasing, and the second guide hole has a second guide tube extending from the second guide surface through the first guide surface and toward the first connecting portion; a fluid is contained in the first container, and the first container is inverted, so that the fluid flows from the first container through the first opening and then through the first guide surface to the first guide hole, and then flows out of the guide cover along the first guide tube to reach the second container, At this time, the gas in the second container will be output from the second flow guide hole along the second flow guide tube to the first container; or, the fluid is contained in the second container, and the second container is inverted, so that the fluid flows from the second container through the second opening and then through the second flow guide surface to the second flow guide hole, and then flows out of the flow guide cover along the second flow guide tube to reach the first container. At this time, the gas in the first container will be output from the first flow guide hole along the first flow guide tube to the second container. The flow guide device of the viscometer as described in claim 1, wherein the first container and the second container are both made of transparent materials, and a first thermometer is installed on the first flow guide surface, and the first thermometer extends from the flow guide cover into the interior of the first container, and a second thermometer is installed on the second flow guide surface, and the second thermometer extends from the flow guide cover into the interior of the second container. The flow guide device of the viscometer as described in claim 2, wherein a first convex column extending toward the first connecting portion is provided on the first flow guide surface, a first fixed tube is sleeved on the first convex column, one end of the first thermometer is correspondingly embedded in the first fixed tube, and the other end of the first thermometer is a first measuring end; a second convex column extending toward the second connecting portion is provided on the second flow guide surface, a second fixed tube is sleeved on the second convex column, one end of the second thermometer is correspondingly embedded in the second fixed tube, and the other end of the second thermometer is a second measuring end. The flow guide device of the viscometer as described in claim 1, wherein the first container and the second container are both made of transparent materials, and a first scale mark is further provided on the first container, and a second scale mark is further provided on the second container. The flow guide device of the viscometer as described in claim 1, wherein a first funnel groove is concave on the first flow guide surface and gradually shrinks toward the first flow guide hole, and a second funnel groove is concave on the second flow guide surface and gradually shrinks toward the second flow guide hole. The flow guide device of the viscometer as described in claim 1, wherein at least one first protrusion is further provided on the inner wall of the first connecting portion, and the first protrusion is screwed into the thread of the first opening portion; the inner wall of the second connecting portion is further provided with at least one second protrusion, and the second protrusion is screwed into the thread of the second opening portion. The flow guide device of the viscometer as described in claim 1, wherein the first connecting portion is concave in the direction of the first flow guide surface until a first stop surface is formed before the first flow guide surface; the second connecting portion is concave in the direction of the second flow guide surface until a second stop surface is formed before the second flow guide surface. The flow guide device of the viscometer as described in claim 7, wherein a first leak-proof ring is further arranged between the first opening and the first stop surface; and a second leak-proof ring is further arranged between the second opening and the second stop surface. A method for performing viscosity testing using the flow guide device of the viscometer described in claim 1 is implemented in conjunction with a timer, and the steps include: containing the fluid in the first container; inverting the first container so that the fluid flows from the first container through the first opening and then through the first flow guide surface to the first flow guide hole; starting the timer when the fluid flows out along the first flow guide tube; stopping the timer when the fluid flows from the first container through the flow guide cover to the second container and reaches a specified capacity, and substituting a time parameter measured by the timer into A viscosity formula is used to calculate and obtain a viscosity value of the fluid; or the fluid is placed in the second container; the second container is inverted so that the fluid flows from the second container through the second opening and then through the second guide surface to the second guide hole; when the fluid flows out along the second guide tube, the timer is started; when the fluid flows from the second container through the guide cover to the first container and reaches the specified capacity, the timer is stopped, and the time parameter measured by the timer is substituted into the viscosity formula for calculation to obtain the viscosity value of the fluid. The viscosity detection method as described in claim 9, wherein the flow guide device detects the viscosity values of different fluids, and then outputs the viscosity values of the fluids and the measured time parameters into a comparison table.

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