Kinematic viscosity testing device and testing method

Abstract

The invention relates to the technical field of liquid viscosity detection, in particular to a kinematic viscosity testing device and method, and the kinematic viscosity testing device comprises a sample pool assembly and a detection assembly. The two detection inner plates of the sample cell assembly are hinged to have an open state and a closed state, a capillary space extending in the vertical direction is defined by the two detection inner plates in the closed state, and the capillary phenomenon is met when liquid moves downwards in the capillary space. The sample pool assembly can be inserted into or separated from the containing groove of the detection assembly, and the detection assembly can detect the time difference when liquid in the capillary space passes through different positions. The test method is applied to the device and comprises the following steps: closing the sample pool assembly and inserting the sample pool assembly into the accommodating groove, and starting a detection function; liquid is dropped into the liquid storage tank so that the liquid can flow into the capillary space, the detection assembly detects the time difference when the liquid flows through different positions, and the kinematic viscosity of the liquid is obtained through calculation; and taking out the sample cell assembly from the detection assembly, and opening the sample cell assembly to clean the liquid.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid viscosity detection, and in particular to a kinematic viscosity testing device and a testing method. Background Art

[0002] In industrial production processes, it is necessary to test the kinematic viscosity of oil. For example, by monitoring the viscosity changes of lubricating oil, it can help determine whether the lubricating oil has contamination and aging problems, improve the availability of key equipment, and avoid equipment adhesive wear caused by insufficient lubrication. Adhesive wear is one of the main causes of equipment downtime. In addition, when judging the quality of fuel and lubricating oil, as well as when conducting quality control on production feed inspection, the kinematic viscosity of oil is also involved. However, existing kinematic viscosity testing devices have a complex structure and a large overall size, making them inconvenient to carry. The test sample can only be brought to the device for operation, which has low operating efficiency. In addition, a complex cleanup process is required after one test to ensure the accuracy of subsequent tests, further reducing the detection efficiency and making the operation process cumbersome. Summary of the Invention

[0003] An object of the present invention is to provide a kinematic viscosity testing device that is easy to carry and operate, and can improve detection efficiency.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] A kinematic viscosity testing device is provided, comprising:

[0006] The sample cell assembly includes two detection inner plates, the two detection inner plates being hinged to have an open state and a closed state. In the closed state, the two detection inner plates enclose a capillary space extending in a vertical direction, and the two detection inner plates are configured so that liquid conforms to a capillary phenomenon when moving downward in the capillary space.

[0007] The detection component has a receiving groove, the sample cell component can be inserted into or out of the receiving groove, and the detection component can detect the time difference when the liquid in the capillary space of the sample cell component in the receiving groove passes through different positions.

[0008] Optionally, both of the two detection inner plates have protruding strips. In the closed state, the protruding strips of the two detection inner plates are arranged relative to each other, and the distance between the two protruding strips meets the preset distance, so that the liquid conforms to the capillary phenomenon when moving downward between the two protruding strips.

[0009] Optionally, the sample pool assembly includes two detection outer plates, which are respectively connected to the two detection inner plates, and the two detection outer plates are respectively provided with a first magnetic component and a second magnetic component, and there is an attractive force between the first magnetic component and the second magnetic component, so that in the closed state, the two detection inner plates are pressed against each other.

[0010] Optionally, a positioning piece is protruding from the detection inner plate, and the positioning piece is located between the two detection inner plates to limit the distance between the two protruding strips to comply with the preset distance.

[0011] Optionally, a third magnetic component and a fourth magnetic component are provided on the detection component. When the sample pool component is located in the accommodating groove, there is attraction between the first magnetic component and the third magnetic component, and there is attraction between the second magnetic component and the fourth magnetic component.

[0012] Optionally, the accommodating groove is deep along the first direction, and there are a plurality of first magnetic members, which are sequentially arranged in a plurality of rows along the first direction, and the polarities of the first magnetic members in two adjacent rows are opposite;

[0013] There are multiple second magnetic members, and the multiple second magnetic members are magnetically attracted to the multiple first magnetic members in a one-to-one correspondence;

[0014] There are multiple third magnetic members, and the multiple third magnetic members are magnetically attracted to the multiple first magnetic members in a one-to-one correspondence;

[0015] There are a plurality of the fourth magnetic members, and the plurality of the fourth magnetic members are magnetically attracted to the plurality of the second magnetic members in a one-to-one correspondence.

[0016] Optionally, the detection component includes M groups of position detection sensors, and the M groups of position detection sensors are used to detect the time difference of liquid flowing through different positions, and M is a positive integer greater than 1.

[0017] Optionally, in the closed state, the two detection inner plates are arranged to form M detection channels, the M detection channels have different intersection positions with the capillary space, and the detection light paths of the M groups of position detection sensors are respectively located in the M detection channels.

[0018] Optionally, in the closed state, the two detection inner plates are arranged to form a liquid storage tank, and the liquid storage tank is connected to the capillary space.

[0019] Another object of the present invention is to provide a testing method that is applied to the above-mentioned kinematic viscosity testing device, which is simple to operate and can improve detection efficiency.

[0020] To achieve this object, the present invention adopts the following technical solutions:

[0021] A testing method is provided, which is applied to the above-mentioned kinematic viscosity testing device, and the testing method comprises the following steps:

[0022] Preparation stage: closing the sample pool assembly and inserting it into the receiving groove of the detection assembly, adjusting the detection assembly so that the capillary space extends in the vertical direction, and starting the detection function of the detection assembly;

[0023] Testing phase: dripping liquid into the liquid reservoir so that the liquid flows into the capillary space, and the detection component detects the time difference of the liquid flowing through different positions, and calculates the kinematic viscosity of the liquid;

[0024] Cleaning stage: remove the sample pool assembly from the detection assembly, open the sample pool assembly and clean out the liquid.

[0025] Beneficial effects of the present invention:

[0026] The present invention provides a kinematic viscosity testing device, comprising a sample cell assembly and a detection assembly. The sample cell assembly includes two detection inner plates, which are hingedly connected to have an open state and a closed state. In the closed state, the two detection inner plates enclose a capillary space extending in a vertical direction. Liquid moves downward in the capillary space in accordance with the capillary phenomenon. The detection assembly has a receiving groove into which the sample cell assembly can be inserted and removed. The detection assembly can detect the time difference between the liquid passing through different positions in the capillary space of the sample cell assembly within the receiving groove. Since the liquid moves downward in accordance with the capillary phenomenon, the kinematic viscosity of the liquid can be calculated based on the distance between different positions and the time difference between the liquid passing through different positions. The kinematic viscosity testing device only requires closing the sample cell assembly, inserting the entire assembly into the receiving groove of the detection assembly, dripping liquid into the capillary space, and then placing the entire assembly vertically for a period of time. It is simple to operate and portable. After the test is completed, the sample cell assembly only needs to be removed, the two detection inner plates opened, and the previous sample wiped off before the next sample can be tested. Multiple tests can also ensure high operational efficiency.

[0027] The present invention also provides a testing method applicable to the aforementioned kinematic viscosity testing device, comprising the following steps: a preparation phase: closing the sample cell assembly and inserting it into the receiving groove of the detection assembly, adjusting the detection assembly so that the capillary space extends vertically, and activating the detection function of the detection assembly; a testing phase: dripping liquid into the liquid reservoir so that the liquid flows into the capillary space, and the detection assembly detects the time difference of the liquid flowing through different positions to calculate the kinematic viscosity of the liquid; and a cleaning phase: removing the sample cell assembly from the detection assembly, opening the sample cell assembly, and cleaning out the liquid. When this testing method is applied to the aforementioned kinematic viscosity testing device, the testing operation is simplified and the detection efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 1 is a schematic diagram of the assembly of a kinematic viscosity testing device provided in an embodiment of the present invention;

[0029] Figure 2 is an exploded view of a sample cell assembly provided in an embodiment of the present invention;

[0030] Figure 3 is an exploded view of a detection assembly provided by an embodiment of the present invention;

[0031] Figure 4 This is a schematic structural diagram of the detection inner plate provided by an embodiment of the present invention;

[0032] Figure 5 is an exploded schematic diagram of the detection inner panel and part of the detection assembly in the open state provided by an embodiment of the present invention;

[0033] Figure 6 is a cross-sectional view of a sample cell assembly provided by an embodiment of the present invention;

[0034] Figure 7 yes Figure 6 Enlarged view of point A in the middle.

[0035] In the picture:

[0036] 1. Sample cell assembly; 11. Inner detection plate; 111. Protruding strip; 112. Threaded hole; 113. Stop block; 114. Stop slot; 12. Outer detection plate; 121. Receiving slot; 13. First magnetic element; 14. Second magnetic element; 15. Positioning element; 151. Ejector pin; 152. Ejector ball; 16. Insulating elastic pad; 17. Pin; 18. Axis clamp; 101. Capillary space; 102. Detection channel; 103. Liquid reservoir;

[0037] 2. Detection assembly; 21. Accommodation groove; 22. Third magnetic member; 23. Fourth magnetic member; 24. First circuit board; 241. Transmitter; 25. Second circuit board; 251. Receiver; 26. Blocking gasket; 27. Half shell;

[0038] 900. Liquid. DETAILED DESCRIPTION

[0039] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the foregoing drawings.

[0040] In this application, the terms "comprises," "includes," "has," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0041] In this application, the term "and / or" describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this application generally indicates that the related objects are in an "and / or" relationship.

[0042] In this application, the terms "connect," "combine," "couple," and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without an intermediary, and an indirect connection refers to two parts or components being connected to at least one intermediary, with the two parts or components being connected via the intermediary. Furthermore, "connect" and "couple" are not limited to physical or mechanical connections or couplings and may include electrical connections or couplings.

[0043] In this application, it will be understood by those skilled in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerance caused by manufacturing, assembly, use, etc. associated with a specific value. Such terms should also be considered to disclose a range defined by the absolute values of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values that do not use relative terms should also be disclosed as specific values with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0044] In this application, it will be understood by those skilled in the art that the function performed by an assembly can be performed by one assembly, multiple assemblies, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one assembly, or a combination of multiple parts.

[0045] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to the other element "upper" or "lower", but also be indirectly connected to the other element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, below can include directly below, lower left, lower right, lower front and lower back, etc.

[0046] In industrial production processes, it is necessary to test the kinematic viscosity of oil. For example, by monitoring the viscosity changes of lubricating oil, it can help determine whether the lubricating oil has contamination and aging problems, improve the availability of key equipment, and avoid equipment adhesive wear caused by insufficient lubrication. Adhesive wear is one of the main causes of equipment downtime. In addition, when judging the quality of fuel and lubricating oil, as well as when conducting quality control on production feed inspection, the kinematic viscosity of oil is also involved. However, existing kinematic viscosity testing devices have a complex structure and a large overall size, making them inconvenient to carry. The test sample can only be brought to the device for operation, which has low operating efficiency. In addition, a complex cleanup process is required after one test to ensure the accuracy of subsequent tests, further reducing the detection efficiency and making the operation process cumbersome.

[0047] In order to solve the above problems, this embodiment provides a kinematic viscosity testing device, which is easy to carry and easy to operate, and can improve detection efficiency.

[0048] like Figure 1-Figure 7 As shown, the kinematic viscosity testing device of this embodiment includes a sample cell assembly 1 and a detection assembly 2. Among them, the sample cell assembly 1 includes two detection inner plates 11, and the two detection inner plates 11 are hinged to have an open state and a closed state. In the closed state, the two detection inner plates 11 are arranged to form a capillary space 101 extending in the vertical direction, and the liquid 900 conforms to the capillary phenomenon when moving downward in the capillary space 101. The detection assembly 2 has a receiving groove 21, and the sample cell assembly 1 can be inserted into or out of the receiving groove 21. The detection assembly 2 can detect the time difference when the liquid 900 in the capillary space 101 of the sample cell assembly 1 in the receiving groove 21 passes through different positions, and since the downward movement of the liquid 900 conforms to the capillary phenomenon, the kinematic viscosity of the liquid 900 can be calculated through the vertical distance between different positions and the time difference when the liquid 900 passes through different positions.

[0049] The kinematic viscosity tester requires only closing the sample cell assembly 1, inserting it into the receiving groove 21 of the detection assembly 2, dripping liquid 900 into the capillary space 101, and leaving the entire assembly upright for a period of time. It is simple to operate and portable. After the test is completed, simply remove the sample cell assembly 1, open the two detection inner plates 11, and wipe off the previous sample before testing the next sample. Multiple tests can also ensure high operational efficiency.

[0050] Optionally, both detection inner plates 11 have protruding strips 111. In the closed state, the protruding strips 111 of the two detection inner plates 11 are arranged opposite to each other, that is, the end surfaces of the two protruding strips 111 are arranged parallel and spaced apart. Figure 7 As shown, the distance between the two protruding bars 111 meets the preset distance, i.e., a marked in the figure. The distance between the two protruding bars 111 meets the preset distance to ensure that the liquid 900 complies with the capillary phenomenon when moving downward between the two protruding bars 111. Optionally, the value of a is 100 microns. When the test starts, the protruding bars 111 extend in the vertical direction, and the liquid 900 will move vertically downward along the end surface of the protruding bars 111 and between the end surfaces of the two protruding bars 111. It can be seen that according to the capillary phenomenon, the liquid 900 will not move to the side of the protruding bar 111 or the grooves on both sides of the protruding bar 111. The liquid 900 will only be located between the end surfaces of the two protruding bars 111 and move vertically downward along the extension direction of the protruding bars 111.

[0051] Optionally, in this embodiment, the width b of the protruding strip 111 is 2 mm.

[0052] In order to ensure that the end faces of the two protruding strips 111 are parallel to each other and the distance between the two end faces meets the preset distance, it is necessary to ensure that the two detection inner plates 11 do not separate from each other. Optionally, the sample cell assembly 1 includes two detection outer plates 12, which are respectively connected to the two detection inner plates 11. The two detection outer plates 12 are respectively provided with a first magnetic member 13 and a second magnetic member 14. The first magnetic member 13 and the second magnetic member 14 have an attractive force between them, so that the two detection inner plates 11 are pressed against each other in the closed state.

[0053] Optionally, a positioning member 15 is provided protruding from the detection inner plate 11. The positioning member 15 is located between the two detection inner plates 11 to limit the distance between the two protruding strips 111 to a predetermined distance. Optionally, at least three positioning members 15 are provided, and all positioning members 15 are not in a straight line. Three points can form a plane. At least three positioning members 15 can ensure that the distance between the two detection inner plates 11 is consistent at all locations and that the distance between the two protruding strips 111 meets the predetermined distance.

[0054] Optionally, in order to facilitate the adjustment of the protruding height of each positioning member 15, in this embodiment, each positioning member 15 includes a top column 151 and a top ball 152. The top column 151 is a columnar structure with an external thread on the side wall, and the top ball 152 is a columnar structure with an external thread on the side wall and a hemisphere on the end. The top ball 152 is connected to one detection inner plate 11, and the top column 151 is connected to the other detection inner plate 11. The hemisphere of the top ball 152 is pressed and contacted with the end face of the top column 151. The overall protruding height of the top column 151 and the top ball 152 is appropriate, which can ensure that the distance between the two protruding strips 111 meets the preset distance.

[0055] To facilitate adjustment of the protruding height of the top post 151 and the top ball 152, at least three threaded holes 112 are provided on the opposing surfaces of the two detection inner plates 11. Optionally, in this embodiment, at least three top posts 151 are screwed in a one-to-one correspondence with the at least three threaded holes 112 of one detection inner plate 11, and at least three top balls 152 are screwed in a one-to-one correspondence with the at least three threaded holes 112 of the other detection inner plate 11. Of course, in other embodiments, it is also possible to configure some of the top posts 151 and some of the top balls 152 to be screwed in one detection inner plate 11, while the remaining top balls 152 and top posts 151 are screwed in the other detection inner plate 11, so as to ensure that one top post 151 abuts one top ball 152. It is known that the protruding height of the top post 151 or the top ball 152 can be adjusted by rotating the top post 151 or the top ball 152 to ensure that the end faces of the two protruding strips 111 are parallel to each other and the distance between them meets the preset distance. The first magnetic member 13 and the second magnetic member 14 are magnetically coupled to ensure that the two detection inner plates 11 are in contact with each other, and at least three positioning members 15 are used to ensure that the end faces of the two protruding strips 111 are parallel to each other and the distance between the two meets the preset distance. This ensures that when the liquid 900 flows between the two protruding strips 111, it complies with the capillary principle and exhibits a capillary phenomenon.

[0056] It can be seen that the kinematic viscosity testing device uses the flow of liquid 900 between two protruding strips 111 that are very close to each other in accordance with the capillary principle to test the kinematic viscosity of the liquid 900. The two protruding strips 111 that are very close to each other replace the capillary tube. The two protruding strips 111 can be opened to achieve quick and thorough cleaning. Compared with cleaning the sample in the capillary tube, the cleaning degree and efficiency are greatly improved, and the cleaning steps are simple and easy to operate.

[0057] Optionally, a limit block 113 and a limit groove 114 are respectively provided on the two detection inner plates 11, so that the two detection inner plates 11 can be accurately aligned when closed, ensuring that the two protruding strips 111 are completely opposite to each other. Optionally, the limit block 113 and the limit groove 114 are set away from the hinge position. Optionally, along the length direction of the detection inner plate 11, one end is the hinge position, and the other end is provided with a limit block 113 and a limit groove 114, and one detection inner plate 11 has a limit block 113 and a limit groove 114 on one side along its own width direction, and also has a limit block 113 and a limit groove 114 on the other side. Correspondingly, the other detection inner plate 11 has a limit groove 114 and a limit block 113 on one side along its own width direction, and also has a limit groove 114 and a limit block 113 on the other side, so that the limit blocks 113 and the limit grooves 114 correspond one to one with each other for limiting.

[0058] Optionally, in the closed state, the two detection inner plates 11 enclose a liquid reservoir 103, which is connected to the capillary space 101. That is, one detection inner plate 11 has a liquid reservoir half-trough, and the other detection inner plate 11 has another liquid reservoir half-trough. When the two detection inner plates 11 are closed, the two liquid reservoir halves form a liquid reservoir 103. One end of the liquid reservoir 103 is open to the outside world, and the opening is located at the top. The other end of the liquid reservoir 103, i.e., the bottom of the liquid reservoir 103, is provided with a protruding strip 111, that is, the liquid reservoir 103 is connected to the capillary space 101.

[0059] Optionally, the hinges at one end of the two detection inner plates 11 can intersect with each other, with the through holes on the hinges located in a straight line, and the pin 17 passes through the through holes on the multiple hinges to hinge the two detection inner plates 11. Optionally, a shaft clamp 18 is provided at each end of the pin 17 to prevent the pin 17 from detaching from either hinge, thereby ensuring a stable hinge connection between the two detection inner plates 11.

[0060] Optionally, a receiving groove 121 is opened on the opposite side of the two detection outer plates 12, and a thermal insulation elastic pad 16 is arranged in the receiving groove 121. The thermal insulation elastic pad 16 is clamped between the detection outer plate 12 and the detection inner plate 11, which can ensure a flexible connection between the detection inner plate 11 and the detection outer plate 12 and will not wear each other.

[0061] Because temperature has a significant impact on the kinematic viscosity of the liquid 900, a heating pad is optionally provided between the inner detection plate 11 and the outer detection plate 12 in this embodiment. The heating pad is used to increase the temperature of the sample liquid 900 and maintain it at approximately 40°C for testing. Of course, in other embodiments, different testing temperatures may be set as needed.

[0062] Optionally, the sample cell assembly 1 further includes a temperature sensor for detecting the temperature of the liquid 900. To avoid affecting the flow of the liquid 900, in some embodiments, the temperature sensor detects the temperature of the protruding strip 111. Since the protruding strip 111 is made of aluminum and has a strong heat transfer capability, the temperature of the protruding strip 111 can be equated with the temperature of the liquid 900. Alternatively, a temperature compensation experiment can be performed in advance to obtain the temperature difference between the protruding strip 111 and the liquid 900, and then the precise temperature of the liquid 900 can be calculated.

[0063] Optionally, in this embodiment, the detection assembly 2 includes two half-shells 27, each of which has a receiving half-slot. The two half-shells 27 are screwed together to form a receiving slot 21. Optionally, the sample cell assembly 1 is inserted into or removed from the top opening of the receiving slot 21. A blocking gasket 26 is provided at the bottom of the receiving slot 21 to prevent the sample cell assembly 1 from falling out.

[0064] To ensure that the sample cell assembly 1 can be quickly positioned when inserted into the receiving groove 21 of the detection assembly 2, a third magnetic member 22 and a fourth magnetic member 23 are optionally provided on the detection assembly 2. When the sample cell assembly 1 is located in the receiving groove 21, there is an attraction between the first magnetic member 13 and the third magnetic member 22, and there is an attraction between the second magnetic member 14 and the fourth magnetic member 23. It can be seen that the first magnetic member 13 and the second magnetic member 14 can not only be used to provide a force for the two detection inner plates 11 to press against each other, but can also magnetically cooperate with the third magnetic member 22 and the fourth magnetic member 23 on the detection assembly 2, so that the sample cell assembly 1 can be quickly positioned when inserted into the detection assembly 2.

[0065] In order to further improve the accuracy of magnetic positioning, the accommodating groove 21 is optionally deep along the first direction. In this embodiment, the first direction is the vertical direction. There are multiple first magnetic members 13, and the multiple first magnetic members 13 are arranged in multiple rows in sequence along the first direction, and the polarities of the first magnetic members 13 in two adjacent rows are opposite. Correspondingly, there are multiple second magnetic members 14, and the multiple second magnetic members 14 are magnetically attracted to the multiple first magnetic members 13 in a one-to-one manner. There are multiple third magnetic members 22, and the multiple third magnetic members 22 are magnetically attracted to the multiple first magnetic members 13 in a one-to-one manner. There are multiple fourth magnetic members 23, and the multiple fourth magnetic members 23 are magnetically attracted to the multiple second magnetic members 14 in a one-to-one manner. That is, if the sample pool assembly 1 and the detection assembly 2 are misaligned with each other in the first direction, there will be a repulsive force between the first magnetic member 13 and the third magnetic member 22, and there will also be a repulsive force between the second magnetic member 14 and the fourth magnetic member 23. In this embodiment, along the first direction, the first magnetic member 13, the second magnetic member 14, the third magnetic member 22 and the fourth magnetic member 23 all have three rows, and the polarity of the same end of the three rows of magnetic members in each group is NSN or SNS, that is, the polarity between the two adjacent rows of magnetic members is opposite, the first row of the first magnetic member 13 can only attract the first row of the third magnetic member 22, and the first row of the first magnetic member 13 will repel the second row of the third magnetic member 22, and the second row of the first magnetic member 13 will repel the third row of the third magnetic member 22, until the first magnetic member 13 and the third magnetic member 22 correspond one to one.

[0066] Of course, in other embodiments, each group of magnetic elements may also be arranged in two rows, four rows or more rows, which is not limited here.

[0067] Optionally, in this embodiment, the three rows of magnetic elements are arranged in a V-shape, with the opening of the V-shape facing vertically upward, so that the sample pool component 1 and the detection component 2 can be quickly positioned during the process of being inserted into the sample pool component 1.

[0068] Optionally, the detection assembly 2 includes M sets of position detection sensors, which are used to detect the time difference of the liquid 900 flowing through different positions, where M is a positive integer greater than 1. That is, the value of M can be 2, 3, 4, 5, or a larger positive integer. In this embodiment, the value of M is 3, which can eliminate a set of data with large errors.

[0069] Optionally, in this embodiment, the position detection sensor includes a transmitter 241 and a receiver 251. The transmitters 241 of the three groups of position detection sensors are all disposed on the first circuit board 24, and the receivers 251 of the three groups of position detection sensors are all disposed on the second circuit board 25. Optionally, in this embodiment, the first circuit board 24 and the second circuit board 25 are disposed opposite each other and are both connected to the half-shell 27 of the detection assembly 2. The two half-shells 27 are butted together to form a shell. Three through holes are respectively provided on two opposite side surfaces of the shell. The three transmitters 241 of the first circuit board 24 pass through the three through holes on one side of the shell to emit light toward the accommodating groove 21 in the shell. The three receivers 251 of the second circuit board 25 pass through the three through holes on the other side of the shell to receive light toward the accommodating groove 21 in the shell.

[0070] To prevent light divergence and ensure the detection accuracy of the position detection sensor, optionally, in the closed state, the two detection inner plates 11 enclose M detection channels 102. Each of the M detection channels 102 intersects with the capillary space 101 at a different location, and the detection light paths of the M groups of position detection sensors are located within each of the M detection channels 102. That is, a set of transmitting end 241 and receiving end 251 is correspondingly disposed at the two ends of a detection channel 102. In this embodiment, the extension directions of the three detection channels 102 are mutually parallel and perpendicular to the extension direction of the protruding strip 111. Optionally, the three detection channels 102 are evenly spaced.

[0071] Optionally, one detection channel 102 corresponds to two detection grooves formed on the detection inner plate 11. The two detection grooves are located on either side of the protruding strip 111, and the detection grooves on the two detection inner plates 11 are mirror-finished. When the two detection inner plates 11 are closed, a single detection channel 102 is formed. A single detection channel 102 has two sections separated by the capillary space 101. When there is no liquid 900 in the capillary space 101, the light path will travel from the transmitting end 241 through the capillary space 101 to the receiving end 251. When there is liquid 900 in the capillary space 101, the light path will be blocked and cannot reach the receiving end 251.

[0072] The installation process of the sample pool assembly 1 includes: first, the first magnetic component 13 and the second magnetic component 14 are respectively embedded in the outer side of the measuring outer plate, and the inner side is fixed with instant adhesive. The pole faces of the first magnetic component 13 and the second magnetic component 14 are flush with the outer side of the measuring outer plate, and the arrangement of the magnetic poles of the three rows of magnetic components in each group of magnetic components is NSN or SNS. Then, the thermal insulation elastic pad 16 is fixed to the inner side of the measuring outer plate with adhesive. Next, the top ball 152 and the top column 151 are respectively installed in the threaded hole 112 of the measuring inner plate, and the depth of the thread is adjusted so that the distance between the two measuring inner plates after closing is maintained at 100 microns, and the top ball 152 and the top column 151 are fixed with thread glue. Then, the two measuring inner plates and the two measuring outer plates are respectively locked and fixed with countersunk screws. Finally, close the symmetrical measuring inner plates on both sides, pass the pin 17 through the through hole of the hinge part, and fix it with the shaft clamp 18, and ensure that the components on both sides are symmetrical, fit neatly, and have no obvious misalignment.

[0073] The installation process of the detection component 2 includes: first, the third magnetic component 22 and the fourth magnetic component 23 are respectively installed in the through hole of the shell of the detection component 2, and the pole surfaces of the third magnetic component 22 and the fourth magnetic component 23 are flush with the inner wall surface of the accommodating groove 21, and the outside is fixed with instant adhesive. The arrangement of the magnetic poles of the three rows of magnetic components in each group of magnetic components is NSN or SNS. Then, the two half shells 27 are fastened and fixed with hexagonal screws to keep the joints flat and without obvious misalignment. Next, the two blocking washers 26 are installed in the notches on both sides of the bottom of the shell of the detection component 2 with hexagonal screws. Finally, the first circuit board 24 and the second circuit board 25 are fixed to both sides of the shell with cross head screws, and ensure that the transmitting end 241 and the receiving end 251 are accurately located at the through hole of the shell.

[0074] This kinematic viscosity testing device cleverly utilizes magnetic attraction and three-point positioning to precisely ensure that the internal gap of capillary space 101 meets a preset distance, thereby ensuring that liquid 900 exhibits capillary behavior. Furthermore, through magnetic attraction and the misalignment of adjacent rows of positive and negative poles, this kinematic viscosity testing device simultaneously achieves stable closure within both test chambers and precise positioning of sample cell assembly 1 and test assembly 2.

[0075] Not only that, the kinematic viscosity testing device is small and convenient, easy to carry, and can be used for testing anytime and anywhere. The test results are consistent with those in the laboratory, and the accuracy is within the range of ±3%. The kinematic viscosity testing device does not require solvent operation, requires fewer consumables, has low processing costs, has little impact on the environment, and is easy to clean. It only needs to wipe the surface of the liquid storage tank 103 and the protruding strip 111 with a non-abrasive cleaning pad. The kinematic viscosity testing device requires a small amount of oil sample, and only a few drops of oil, about 60 microliters, are used to measure the kinematic viscosity. The kinematic viscosity testing device's innovative design allows testing of almost any sample, including transparent oil samples, black and heavily contaminated oil samples. It has a wide range of applications and does not require any pretreatment. It is easy to operate and highly efficient.

[0076] This embodiment also provides a testing method, which is applied to the above-mentioned kinematic viscosity testing device. The testing method includes a preparation stage, a testing stage, and a cleaning stage.

[0077] The preparation stage includes the following steps: closing the sample cell assembly 1 and inserting it into the receiving groove 21 of the detection assembly 2, adjusting the detection assembly 2 so that the capillary space 101 extends vertically, and then activating the detection function of the detection assembly 2, that is, activating at least two sets of position detection sensors, or of course, all of them.

[0078] The test phase includes the following steps: liquid 900 is dripped into the liquid storage tank 103 so that the liquid 900 flows into the capillary space 101, and the detection component 2 detects the time difference of the liquid 900 flowing through different positions. At this time, the kinematic viscosity of the liquid 900 can be calculated according to the capillary principle, and the test is completed.

[0079] The cleaning stage includes the following steps: removing the sample cell assembly 1 from the detection assembly 2, opening the sample cell assembly 1 and cleaning out the liquid 900. A non-abrasive cleaning pad may be used to wipe the surface of the liquid reservoir 103 and the protruding strip 111.

[0080] Of course, the above three stages can be repeated multiple times to obtain multiple test results for the same liquid, or to test multiple liquids.

[0081] When the kinematic viscosity testing device is used with the testing method, the testing operation is simple and the testing efficiency is improved.

[0082] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Kinematic viscosity testing device, characterized in that, include: The sample cell assembly (1) includes two detection inner plates (11), the two detection inner plates (11) being hinged to have an open state and a closed state. In the closed state, the two detection inner plates (11) enclose a capillary space (101) extending in a vertical direction, and the two detection inner plates (11) are configured so that the liquid (900) conforms to a capillary phenomenon when moving downward in the capillary space (101); A detection component (2) is provided, wherein the detection component (2) has a receiving groove (21), the sample cell component (1) can be inserted into or removed from the receiving groove (21), and the detection component (2) can detect the time difference when the liquid (900) in the capillary space (101) of the sample cell component (1) in the receiving groove (21) passes through different positions.

2. The kinematic viscosity testing device according to claim 1, characterized in that: Both of the two detection inner plates (11) have protruding strips (111). In the closed state, the protruding strips (111) of the two detection inner plates (11) are arranged relative to each other, and the distance between the two protruding strips (111) conforms to a preset distance, so that the liquid (900) conforms to the capillary phenomenon when moving downward between the two protruding strips (111).

3. The kinematic viscosity testing device according to claim 2, characterized in that: The sample pool assembly (1) includes two detection outer plates (12), the two detection outer plates (12) are respectively connected to the two detection inner plates (11), and the two detection outer plates (12) are respectively provided with a first magnetic attraction member (13) and a second magnetic attraction member (14), and there is an attractive force between the first magnetic attraction member (13) and the second magnetic attraction member (14), so that in the closed state, the two detection inner plates (11) are pressed against each other.

4. The kinematic viscosity testing device according to claim 3, characterized in that: A positioning piece (15) is protruding from the detection inner plate (11), and the positioning piece (15) is located between the two detection inner plates (11) to limit the distance between the two protruding strips (111) to conform to the preset distance.

5. The kinematic viscosity testing device according to claim 3, characterized in that: The detection component (2) is provided with a third magnetic component (22) and a fourth magnetic component (23). When the sample pool component (1) is located in the accommodating groove (21), there is an attractive force between the first magnetic component (13) and the third magnetic component (22), and there is an attractive force between the second magnetic component (14) and the fourth magnetic component (23).

6. The kinematic viscosity testing device according to claim 5, characterized in that: The accommodating groove (21) is deep along the first direction, and the first magnetic members (13) are multiple, and the multiple first magnetic members (13) are sequentially arranged in multiple rows along the first direction, and the polarities of the first magnetic members (13) in two adjacent rows are opposite; There are a plurality of the second magnetic attraction members (14), and the plurality of the second magnetic attraction members (14) are magnetically attracted to the plurality of the first magnetic attraction members (13) in a one-to-one correspondence; There are multiple third magnetic members (22), and the multiple third magnetic members (22) are magnetically attracted to the multiple first magnetic members (13) in a one-to-one correspondence; There are a plurality of the fourth magnetic members (23), and the plurality of the fourth magnetic members (23) are magnetically attracted to the plurality of the second magnetic members (14) in a one-to-one correspondence.

7. The kinematic viscosity testing device according to any one of claims 1 to 6, characterized in that: The detection component (2) includes M groups of position detection sensors, and the M groups of position detection sensors are used to detect the time difference of the liquid (900) flowing through different positions, and M is a positive integer greater than 1.

8. The kinematic viscosity testing device according to claim 7, characterized in that: In the closed state, the two detection inner plates (11) are arranged to form M detection channels (102), the M detection channels (102) all have different intersection positions with the capillary space (101), and the detection light paths of the M groups of position detection sensors are respectively located in the M detection channels (102).

9. The kinematic viscosity testing device according to any one of claims 1 to 6, characterized in that: In the closed state, the two detection inner plates (11) are arranged to form a liquid storage tank (103), and the liquid storage tank (103) is connected to the capillary space (101).

10. A test method, characterized in that Applied to the kinematic viscosity testing device according to any one of claims 1 to 9, the testing method comprises the following steps: Preparation stage: closing the sample pool assembly (1) and inserting it into the receiving groove (21) of the detection assembly (2), adjusting the detection assembly (2) so that the capillary space (101) extends in the vertical direction, and starting the detection function of the detection assembly (2); Testing phase: the liquid (900) is dripped into the liquid storage tank (103) to make the liquid (900) flow into the capillary space (101), the detection component (2) detects the time difference of the liquid (900) flowing through different positions, and calculates the kinematic viscosity of the liquid (900); Cleaning stage: taking the sample pool component (1) out of the detection component (2), opening the sample pool component (1) and cleaning out the liquid (900).

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