Kinematic viscosity testing apparatus

Abstract

The utility model relates to liquid viscosity detection technical field especially relates to a kinematic viscosity testing device, including sample cell subassembly and detection subassembly. Sample cell subassembly includes two detection inner boards, two detection inner boards articulate to have open state and closed state, under the closed state, two detection inner boards surround and form the capillary space along the vertical direction extension, and the liquid is in the capillary space and is in accord with capillary phenomenon when going down. Detection subassembly has the accommodation groove, and sample cell subassembly can insert or separate from the accommodation groove, and detection subassembly can detect the time difference of the liquid in the capillary space of sample cell subassembly in the accommodation groove when passing through different positions, and because the liquid is in accord with capillary phenomenon when going down, the distance between different positions and the time difference of the liquid passing through different positions can be measured to calculate the kinematic viscosity of the liquid. The kinematic viscosity testing device is simple to operate and can be carried. It is easy to clean after detection, and multiple detections can also ensure high operation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of liquid viscosity testing technology, and in particular to a kinematic viscosity testing device. Background Technology

[0002] In industrial production processes, it is necessary to test the kinematic viscosity of oils. For example, by monitoring changes in the viscosity of lubricating oil, it is possible to help determine whether the lubricating oil is contaminated or aged, improving the availability of critical equipment and preventing adhesive wear caused by insufficient lubrication. Adhesive wear is one of the main causes of equipment downtime. Furthermore, the kinematic viscosity of oils is also involved in judging the quality of fuels and lubricating oils, as well as in quality control during incoming material inspection. However, existing kinematic viscosity testing devices are complex in structure and large in size, making them inconvenient to carry. The test sample must be brought to the device for operation, resulting in low operational efficiency. Moreover, a complex cleaning process is required after each test to ensure the accuracy of subsequent tests, further reducing testing efficiency and making the operation cumbersome. Utility Model Content

[0003] The purpose of this invention is to provide a kinematic viscosity testing device that is portable, easy to operate, and can improve testing efficiency.

[0004] To achieve this objective, the present invention adopts the following technical solution:

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

[0006] A sample cell assembly includes two inner detection plates hinged to have an open state and a closed state. In the closed state, the two inner detection plates enclose a capillary space extending in a vertical direction. The two inner detection plates are configured such that when liquid moves downward within the capillary space, it conforms to capillary action.

[0007] The detection component has a receiving groove, the sample cell component is capable of being inserted into or detached from the receiving groove, and the detection component is capable of detecting the time difference when liquid in the capillary space of the sample cell component in the receiving groove passes through different positions.

[0008] Optionally, both inner detection plates have protruding strips. In the closed state, the protruding strips of the two inner detection plates are arranged opposite to each other, and the distance between the two protruding strips conforms to a preset distance, so that the liquid moves down between the two protruding strips in accordance with capillary action.

[0009] Optionally, the sample cell assembly includes two outer detection plates, which are respectively connected to two inner detection plates. A first magnetic attractor and a second magnetic attractor are respectively provided on the two outer detection plates. The first magnetic attractor and the second magnetic attractor have an attraction between them so that the two inner detection plates press against each other in the closed state.

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

[0011] Optionally, at least three positioning elements are provided, and all of the positioning elements are not in a straight line.

[0012] Optionally, the detection component is provided with a third magnetic attractor and a fourth magnetic attractor. When the sample cell component is located in the receiving groove, the first magnetic attractor and the third magnetic attractor have an attractive force, and the second magnetic attractor and the fourth magnetic attractor have an attractive force.

[0013] Optionally, the receiving groove extends longitudinally along a first direction, and there are multiple first magnetic elements. The multiple first magnetic elements are arranged in multiple rows along the first direction, and the polarities of adjacent rows of first magnetic elements are opposite.

[0014] The second magnetic element has multiple components, and each of the multiple second magnetic elements corresponds to and magnetically attracts one of the multiple first magnetic elements;

[0015] The third magnetic element is multiple, and each of the multiple third magnetic elements is magnetically attracted to one of the multiple first magnetic elements;

[0016] The fourth magnetic element is multiple, and each of the multiple fourth magnetic elements is magnetically attracted to one of the multiple second magnetic elements.

[0017] Optionally, the detection component includes M sets of position detection sensors, which are used to detect the time difference of liquid flowing through different positions, where M is a positive integer greater than 1.

[0018] Optionally, in the closed state, the two inner detection plates surround and form M detection channels, each of the M detection channels having a different intersection position with the capillary space, and the detection optical paths of the M sets of position detection sensors are respectively located within the M detection channels.

[0019] Optionally, in the closed state, the two inner detection plates surround a liquid storage tank, which is connected to the capillary space.

[0020] The beneficial effects of this utility model are:

[0021] This invention provides a kinematic viscosity testing device, including a sample cell assembly and a detection assembly. The sample cell assembly includes two inner detection plates hinged together to have an open and a closed state. In the closed state, the two inner detection plates enclose a capillary space extending vertically, where the liquid descends according to capillary action. The detection assembly has a receiving groove, into which the sample cell assembly can be inserted or removed. The detection assembly can detect the time difference as the liquid passes through different positions within the capillary space of the sample cell assembly in the receiving groove. Since the liquid's downward movement conforms to capillary action, the kinematic viscosity of the liquid can be calculated by measuring the distance between different positions and the time difference in liquid passage through those positions. This kinematic viscosity testing device is simple to operate; simply close the sample cell assembly, insert it entirely into the receiving groove of the detection assembly, drip liquid into the capillary space, and leave it upright for a period of time. It is portable. After testing, simply remove the sample cell assembly, open the two inner detection plates, wipe away the previous sample, and proceed with the next sample test. High operational efficiency is maintained even with multiple tests. Attached Figure Description

[0022] Figure 1 This is an assembly diagram of the kinematic viscosity testing device provided in this embodiment of the utility model;

[0023] Figure 2 This is an exploded view of the sample cell assembly provided in this embodiment of the present invention;

[0024] Figure 3 This is an exploded view of the detection component provided in this embodiment of the utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the detection inner plate provided in this embodiment of the utility model;

[0026] Figure 5 This is an exploded view of the detection inner plate and some detection components in the open state provided in this embodiment of the utility model;

[0027] Figure 6 This is a cross-sectional view of the sample cell assembly provided in an embodiment of the present invention;

[0028] Figure 7 yes Figure 6 Enlarged view of point A in the middle.

[0029] In the picture:

[0030] 1. Sample cell assembly; 11. Inner detection plate; 111. Protruding strip; 112. Threaded hole; 113. Limiting block; 114. Limiting groove; 12. Outer detection plate; 121. Receiving groove; 13. First magnetic suction component; 14. Second magnetic suction component; 15. Positioning component; 151. Top column; 152. Top ball; 16. Thermal insulation elastic pad; 17. Pin; 18. Shaft clip; 101. Capillary space; 102. Detection channel; 103. Liquid storage tank;

[0031] 2. Detection component; 21. Receiving slot; 22. Third magnetic chuck; 23. Fourth magnetic chuck; 24. First circuit board; 241. Transmitter; 25. Second circuit board; 251. Receiver; 26. Blocking washer; 27. Half-shell;

[0032] 900, liquid. Detailed Implementation

[0033] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0034] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0035] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0036] In this application, the terms "connection," "combination," "coupling," and "installation" can 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 the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0037] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0038] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0039] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0040] In industrial production processes, it is necessary to test the kinematic viscosity of oils. For example, by monitoring changes in the viscosity of lubricating oil, it is possible to help determine whether the lubricating oil is contaminated or aged, improving the availability of critical equipment and preventing adhesive wear caused by insufficient lubrication. Adhesive wear is one of the main causes of equipment downtime. Furthermore, the kinematic viscosity of oils is also involved in judging the quality of fuels and lubricating oils, as well as in quality control during incoming material inspection. However, existing kinematic viscosity testing devices are complex in structure and large in size, making them inconvenient to carry. The test sample must be brought to the device for operation, resulting in low operational efficiency. Moreover, a complex cleaning process is required after each test to ensure the accuracy of subsequent tests, further reducing testing efficiency and making the operation cumbersome.

[0041] To address the aforementioned issues, this embodiment provides a kinematic viscosity testing device that is portable, easy to operate, and can improve testing efficiency.

[0042] like Figures 1-7 As shown, the kinematic viscosity testing device of this embodiment includes a sample cell assembly 1 and a detection assembly 2. The sample cell assembly 1 includes two inner detection plates 11, which are hinged to have an open state and a closed state. In the closed state, the two inner detection plates 11 enclose a capillary space 101 extending vertically, and the liquid 900 moves downward within the capillary space 101, conforming to capillary action. The detection assembly 2 has a receiving groove 21, into which the sample cell assembly 1 can be inserted or removed. The detection assembly 2 can detect the time difference as the liquid 900 passes through different positions within the capillary space 101 of the sample cell assembly 1 in the receiving groove 21. Since the downward movement of the liquid 900 conforms to capillary action, the kinematic viscosity of the liquid 900 can be calculated by the vertical distance between different positions and the time difference as the liquid 900 passes through different positions.

[0043] This kinematic viscosity testing device only requires closing the sample cell assembly 1, inserting the entire assembly into the receiving groove 21 of the detection assembly 2, dripping liquid 900 into the capillary space 101, and placing it vertically for a period of time. It is simple to operate and portable. After testing, simply remove the sample cell assembly 1, open the two inner detection plates 11, wipe away the previous sample, and proceed with the next sample test. Even with multiple tests, high operational efficiency is maintained.

[0044] Optionally, both inner detection plates 11 have protruding strips 111. In the closed state, the protruding strips 111 of the two inner detection plates 11 are arranged opposite to each other, that is, the end faces of the two protruding strips 111 are parallel and spaced apart. Figure 7 As shown, the distance between the two protruding strips 111 conforms to a preset distance, namely 'a' as indicated in the figure. This preset distance ensures that the liquid 900 exhibits capillary action as it moves downwards between the two protruding strips 111. Optionally, 'a' can be 100 micrometers. At the start of the detection, the protruding strips 111 extend vertically, and the liquid 900 moves vertically downwards along the end faces of the protruding strips 111 and between the end faces of the two protruding strips 111. It is known that, according to capillary action, the liquid 900 will not move to the sides of the protruding strips 111 or to the grooves on both sides of the protruding strips 111; the liquid 900 will only be located between the end faces of the two protruding strips 111 and will move vertically downwards along the extension direction of the protruding strips 111.

[0045] Optionally, in this embodiment, the width b of the protruding strip 111 is 2mm.

[0046] To ensure that the end faces of the two protruding strips 111 are parallel to each other and that the distance between the two end faces meets the preset distance, it is necessary to ensure that the two inner detection plates 11 do not separate from each other. Optionally, the sample cell assembly 1 includes two outer detection plates 12, which are respectively connected to the two inner detection plates 11. The two outer detection plates 12 are respectively provided with a first magnetic suction member 13 and a second magnetic suction member 14. The first magnetic suction member 13 and the second magnetic suction member 14 have an attraction between them so that the two inner detection plates 11 press against each other when closed.

[0047] Optionally, a positioning element 15 is protruding from the inner detection plate 11, and the positioning element 15 is located between the two inner detection plates 11 to ensure that the distance between the two protruding strips 111 conforms to a preset distance. Optionally, at least three positioning elements 15 are provided, and all positioning elements 15 are not on a straight line. Three points can form a surface. At least three positioning elements 15 can ensure that the distance between the two inner detection plates 11 is the same everywhere, and can satisfy the requirement that the distance between the two protruding strips 111 conforms to the preset distance.

[0048] Optionally, to facilitate adjustment of the protrusion height of each positioning component 15, in this embodiment, each positioning component 15 includes a top post 151 and a top ball 152. The top post 151 is a columnar structure with external threads on the sidewall, and the top ball 152 is a columnar structure with external threads on the sidewall and a hemisphere at the end. The top ball 152 is connected to one detection inner plate 11, and the top post 151 is connected to another detection inner plate 11. The hemisphere of the top ball 152 is in abutting contact with the end face of the top post 151. If the overall protrusion height of the top post 151 and the top ball 152 is appropriate, it can ensure that the distance between the two protruding strips 111 meets the preset distance.

[0049] To facilitate adjustment of the protrusion 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 inner detection plates 11. Optionally, in this embodiment, at least three top posts 151 are screwed one-to-one with at least three threaded holes 112 of one inner detection plate 11, and at least three top balls 152 are screwed one-to-one with at least three threaded holes 112 of the other inner detection plate 11. Of course, in other embodiments, some top posts 151 and some top balls 152 can be screwed to one inner detection plate 11, while the remaining top balls 152 and top posts 151 are screwed to the other inner detection plate 11, ensuring that one top post 151 abuts against one top ball 152. It is understood that rotating the top post 151 or the top ball 152 can adjust the protrusion height of 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 suction member 13 and the second magnetic suction member 14 magnetically attract each other to ensure that the two inner detection plates 11 abut against each other. Then, at least three positioning members 15 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. This ensures that when the liquid 900 flows between the two protruding strips 111, it conforms to the capillary principle and exhibits a capillary phenomenon.

[0050] It is known that the kinematic viscosity testing device uses the capillary flow of liquid 900 between two closely spaced protrusions 111 to test the kinematic viscosity of liquid 900. The two closely spaced protrusions 111 replace the capillary tube. The two protrusions 111 can be opened to achieve rapid and thorough cleaning. Compared with cleaning the sample inside the capillary tube, the cleaning degree and efficiency are greatly improved, and the cleaning steps are simple and easy to operate.

[0051] Optionally, the two inner detection plates 11 are also provided with limiting blocks 113 and limiting grooves 114 respectively, so that the two inner detection plates 11 can be accurately aligned when closed, ensuring that the two protruding strips 111 are completely opposite to each other. Optionally, the limiting blocks 113 and limiting grooves 114 are located away from the hinge position. Optionally, along the length direction of the inner detection plate 11, one end is the hinge position, and the other end is provided with a limiting block 113 and a limiting groove 114. One inner detection plate 11 has a limiting block 113 and a limiting groove 114 on one side along its own width direction, and also has a limiting block 113 and a limiting groove 114 on the other side. Correspondingly, the other inner detection plate 11 has a limiting groove 114 and a limiting block 113 on one side along its own width direction, and also has a limiting groove 114 and a limiting block 113 on the other side, so that the limiting blocks 113 and limiting grooves 114 correspond one-to-one for limiting.

[0052] Optionally, in the closed state, the two inner detection plates 11 surround to form a liquid storage tank 103, which is connected to the capillary space 101. That is, one inner detection plate 11 has a liquid storage half-slot, and the other inner detection plate 11 has another liquid storage half-slot. When the two inner detection plates 11 are closed, the two liquid storage half-slots form a liquid storage tank 103. One end of the liquid storage tank 103 is open to the outside and the opening is located at the top. The other end of the liquid storage tank 103, that is, the bottom of the liquid storage tank 103, is provided with a protruding strip 111, that is, the liquid storage tank 103 is connected to the capillary space 101.

[0053] Optionally, the hinged portions at one end of the two inner detection plates 11 can intersect each other, and the through holes on the hinged portions are located in a straight line. The pin 17 passes through the through holes on multiple hinged portions to hinge the two inner detection plates 11. Optionally, a retainer 18 is fitted at each end of the pin 17 to prevent the pin 17 from disengaging from any hinged portion, ensuring that the two inner detection plates 11 are stably hinged.

[0054] Optionally, each of the two outer detection plates 12 has a receiving groove 121 on one side opposite to the other. A heat-insulating elastic pad 16 is provided in the receiving groove 121. The heat-insulating elastic pad 16 is sandwiched between the outer detection plate 12 and the inner detection plate 11, which can ensure a flexible connection between the inner detection plate 11 and the outer detection plate 12 and prevent them from wearing each other.

[0055] Since temperature has a significant impact on the kinematic viscosity of liquid 900, optionally in this embodiment, a heating pad is provided between the inner detection plate 11 and the outer detection plate 12. The heating pad is used to raise the temperature of the sample liquid 900 and maintain it at around 40°C for detection. Of course, in other embodiments, different detection temperatures can be set as needed.

[0056] Optionally, the sample cell assembly 1 also includes a temperature sensor for detecting the temperature of the liquid 900. In order not to affect the flow of the liquid 900, in some embodiments, the temperature sensor detects the temperature of the protrusion 111. Since the protrusion 111 is made of aluminum, which has strong heat transfer capacity, the temperature of the protrusion 111 can be equated to the temperature of the liquid 900. Alternatively, a temperature compensation experiment can be performed in advance to obtain the temperature difference between the protrusion 111 and the liquid 900, and then the accurate temperature of the liquid 900 can be calculated.

[0057] Optionally, in this embodiment, the detection component 2 includes two half-shells 27, each half-shell 27 having a receiving half-groove, the two half-shells 27 being screwed together, and the two receiving half-grooves forming a receiving groove 21. Optionally, the sample cell component 1 is inserted into or pulled out from the top opening of the receiving groove 21, and a blocking washer 26 is provided at the bottom of the receiving groove 21 to prevent the sample cell component 1 from falling out from the bottom.

[0058] To ensure rapid positioning of the sample cell assembly 1 when inserted into the receiving slot 21 of the detection assembly 2, optionally, the detection assembly 2 is provided with a third magnetic chuck 22 and a fourth magnetic chuck 23. When the sample cell assembly 1 is located in the receiving slot 21, there is an attractive force between the first magnetic chuck 13 and the third magnetic chuck 22, and an attractive force between the second magnetic chuck 14 and the fourth magnetic chuck 23. It is understood that the first magnetic chuck 13 and the second magnetic chuck 14 not only provide the force for the two inner detection plates 11 to press against each other, but also magnetically engage with the third magnetic chuck 22 and the fourth magnetic chuck 23 on the detection assembly 2, so as to facilitate rapid positioning of the sample cell assembly 1 when inserted into the detection assembly 2.

[0059] To further improve the accuracy of magnetic positioning, optionally, the receiving groove 21 extends longitudinally along a first direction, which in this embodiment is the vertical direction. Multiple first magnetic attractors 13 are arranged in multiple rows along the first direction, with adjacent rows of first magnetic attractors 13 having opposite polarities. Correspondingly, multiple second magnetic attractors 14 are magnetically attracted to each of the multiple first magnetic attractors 13 in a one-to-one correspondence. Multiple third magnetic attractors 22 are magnetically attracted to each of the multiple first magnetic attractors 13 in a one-to-one correspondence. Multiple fourth magnetic attractors 23 are magnetically attracted to each of the multiple second magnetic attractors 14 in a one-to-one correspondence. That is, if the sample cell assembly 1 and the detection assembly 2 are misaligned in the first direction, there will be a repulsive force between the first magnetic attractors 13 and the third magnetic attractors 22, and there will also be a repulsive force between the second magnetic attractors 14 and the fourth magnetic attractors 23. In this embodiment, along the first direction, the first magnetic attractor 13, the second magnetic attractor 14, the third magnetic attractor 22, and the fourth magnetic attractor 23 each have three rows. The polarity of the same end of the three rows of magnetic attractors in each group is NSN or SNS, that is, the polarity between adjacent rows of magnetic attractors is opposite. The first row of the first magnetic attractor 13 can only attract the first row of the third magnetic attractor 22, and the first row of the first magnetic attractor 13 will repel the second row of the third magnetic attractor 22, and the second row of the first magnetic attractor 13 will repel the third row of the third magnetic attractor 22, until the first magnetic attractor 13 and the third magnetic attractor 22 correspond one-to-one.

[0060] Of course, in other embodiments, each set of magnetic components may also be configured as two, four or more rows, which is not limited here.

[0061] Optionally, in this embodiment, the three rows of magnetic components are arranged in a V-shape, with the opening of the V-shape facing vertically upward, so that the sample cell assembly 1 can be quickly positioned during the insertion of the detection assembly 2.

[0062] Optionally, the detection component 2 includes M sets of position detection sensors. The M sets of position detection sensors 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.

[0063] Optionally, in this embodiment, the position detection sensor includes a transmitter 241 and a receiver 251. The transmitters 241 of the three sets of position detection sensors are all disposed on the first circuit board 24, and the receivers 251 of the three sets 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 arranged opposite to each other and are both connected to the half-shell 27 of the detection component 2. The two half-shells 27 are joined to form a shell. Three through holes are respectively opened on two opposite sides 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 and emit light toward the receiving groove 21 inside 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 and receive light toward the receiving groove 21 inside the shell.

[0064] To prevent light divergence and ensure the detection accuracy of the position detection sensor, optionally, in the closed state, the two inner detection plates 11 enclose M detection channels 102, each of which has a different intersection position with the capillary space 101. The detection optical paths of the M sets of position detection sensors are respectively located within the M detection channels 102. That is, a set of transmitting ends 241 and receiving ends 251 are correspondingly arranged at both ends of a detection channel 102. In this embodiment, the extension directions of the three detection channels 102 are parallel to each other and perpendicular to the extension direction of the protruding strip 111. Optionally, the three detection channels 102 are evenly spaced.

[0065] Optionally, a detection channel 102 has two detection grooves on the inner detection plate 11, which are located on both sides of the protrusion 111. The detection grooves on the two inner detection plates 11 are mirror-shaped, so that when the two inner detection plates 11 are closed, a detection channel 102 is formed. The detection channel 102 has two segments separated by a 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 will not be able to reach the receiving end 251.

[0066] The installation process of the sample cell assembly 1 includes the following steps: First, the first magnetic chuck 13 and the second magnetic chuck 14 are respectively embedded on the outer side of the outer measuring plate, and fixed on the inner side with instant adhesive. The pole faces of the first magnetic chuck 13 and the second magnetic chuck 14 are flush with the outer side of the outer measuring plate, and the magnetic poles of the three rows of magnetic chucks in each group are arranged in an NSN or SNS pattern. Then, the thermal insulation elastic pad 16 is fixed to the inner side of the outer measuring plate with adhesive. Next, the top ball 152 and the top post 151 are respectively installed in the threaded holes 112 of the inner measuring plate. By adjusting the depth of the screwing, the distance between the two inner measuring plates after closing is maintained at 100 micrometers, and the top ball 152 and the top post 151 are fixed with threadlocking adhesive. Finally, the two inner measuring plates and the two outer measuring plates are locked and fixed with countersunk screws. Finally, close the symmetrical inner measuring plates on both sides, insert the pin 17 into the through hole of the hinge, and fix it with the shaft clip 18, ensuring that the components on both sides are symmetrical, fit neatly, and have no obvious misalignment.

[0067] The installation process of detection component 2 includes: First, installing the third magnetic chuck 22 and the fourth magnetic chuck 23 into the through holes of the housing of detection component 2, with the pole faces of the third magnetic chuck 22 and the fourth magnetic chuck 23 flush with the inner wall of the receiving groove 21, and fixing them with instant adhesive on the outside. The magnetic poles of the three rows of magnetic chucks in each group are arranged in an NSN or SNS pattern. Then, the two half-housings 27 are tightened and fixed with hexagonal screws, keeping the joint flat and without obvious misalignment. Next, the two blocking washers 26 are installed at the notches on both sides of the bottom of the housing of 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 housing with Phillips head screws, ensuring that the transmitter 241 and the receiver 251 are accurately located at the through holes of the housing.

[0068] This kinematic viscosity testing device cleverly utilizes magnetic attraction and three-point limiting to precisely ensure that the internal gap of the capillary space 101 conforms to the preset distance, thereby ensuring that the liquid 900 exhibits capillary behavior. Furthermore, this kinematic viscosity testing device simultaneously achieves stable closure of the two detection chambers and precise positioning of the sample cell assembly 1 and the detection assembly 2 through magnetic attraction and the misalignment of adjacent positive and negative poles.

[0069] Furthermore, this kinematic viscosity tester is compact, portable, and can be used anytime, anywhere. The test results are consistent with those obtained in the laboratory, with an accuracy within ±3%. This kinematic viscosity tester operates without solvents, requires few consumables, has low processing costs, minimal environmental impact, and is easy to clean; simply wipe the surface of the reservoir 103 and the protruding strip 111 with a non-abrasive cleaning pad. The kinematic viscosity tester requires only a few drops of oil, approximately 60 microliters, to measure kinematic viscosity. Its innovative design allows testing of virtually any sample, including transparent, black, and heavily contaminated oils, making it widely applicable, requiring no pretreatment, and offering simple and efficient operation.

[0070] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A kinematic viscosity testing device, characterized in that, include: The sample cell assembly (1) includes two inner detection plates (11) hinged to have an open state and a closed state. In the closed state, the two inner detection plates (11) enclose a capillary space (101) extending in a vertical direction. The two inner detection plates (11) are configured such that when a liquid (900) moves downward within the capillary space (101), it conforms to capillary action. The detection component (2) has a receiving groove (21), the sample cell component (1) is able to be inserted into or detached from the receiving groove (21), and the detection component (2) is able to detect the time difference of liquid (900) in the capillary space (101) of the sample cell component (1) in the receiving groove (21) when it passes through different positions.

2. The kinematic viscosity testing device according to claim 1, characterized in that, Both of the inner detection plates (11) have protruding strips (111). In the closed state, the protruding strips (111) of the two inner detection plates (11) are arranged opposite to each other, and the distance between the two protruding strips (111) conforms to a preset distance so that the liquid (900) moves down between the two protruding strips (111) in accordance with capillary action.

3. The kinematic viscosity testing device according to claim 2, characterized in that, The sample cell assembly (1) includes two outer detection plates (12), which are respectively connected to two inner detection plates (11). A first magnetic attractor (13) and a second magnetic attractor (14) are respectively provided on the two outer detection plates (12). The first magnetic attractor (13) and the second magnetic attractor (14) have an attraction between them so that the two inner detection plates (11) press against each other in the closed state.

4. The kinematic viscosity testing device according to claim 3, characterized in that, A positioning element (15) is provided on the inner detection plate (11). The positioning element (15) is located between the two inner detection 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 4, characterized in that, At least three positioning elements (15) are provided, and all positioning elements (15) are not in a straight line.

6. The kinematic viscosity testing device according to claim 3, characterized in that, The detection component (2) is provided with a third magnetic chuck (22) and a fourth magnetic chuck (23). When the sample cell component (1) is located in the receiving groove (21), the first magnetic chuck (13) and the third magnetic chuck (22) have an attractive force, and the second magnetic chuck (14) and the fourth magnetic chuck (23) have an attractive force.

7. The kinematic viscosity testing device according to claim 6, characterized in that, The receiving groove (21) extends along the first direction, and there are multiple first magnetic suction members (13). The multiple first magnetic suction members (13) are arranged in multiple rows along the first direction, and the polarities of two adjacent rows of first magnetic suction members (13) are opposite. The second magnetic attractor (14) has multiple components, and the multiple second magnetic attractors (14) are magnetically attracted to the multiple first magnetic attractors (13) in a one-to-one correspondence; The third magnetic attractor (22) has multiple components, and the multiple third magnetic attractors (22) are magnetically attracted to the multiple first magnetic attractors (13) in a one-to-one correspondence; The fourth magnetic attractor (23) has multiple components, and the multiple fourth magnetic attractors (23) are magnetically attracted to the multiple second magnetic attractors (14) in a one-to-one correspondence.

8. The kinematic viscosity testing apparatus according to any one of claims 1-7, characterized in that, The detection component (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.

9. The kinematic viscosity testing device according to claim 8, characterized in that, In the closed state, the two inner detection plates (11) surround and form M detection channels (102). Each of the M detection channels (102) has a different intersection position with the capillary space (101). The detection optical paths of the M sets of position detection sensors are respectively located in the M detection channels (102).

10. The kinematic viscosity testing apparatus according to any one of claims 1-7, characterized in that, In the closed state, the two inner detection plates (11) surround to form a liquid storage tank (103), which is connected to the capillary space (101).

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