Viscometer

Abstract

The utility model relates to a viscometer. The viscometer comprises a cross arm, one end of the oblique arm is connected with the cross arm, the connecting position is a turning position, a first measuring piece is arranged on the turning position and used for recording the first height of the sample liquid column, and an injection port is formed in the end, away from the turning position, of the cross arm; one end of the plumbing arm is connected with the other end of the inclined arm, a second measuring piece and a third measuring piece are arranged on the plumbing arm, and the second measuring piece and the third measuring piece are used for measuring the flowing time of the sample; communicated sample flowing paths are arranged in the cross arm, the inclined arm and the plumbing arm, a vertical small pipe is arranged in the tail end of the cross arm, and the viscometer provided by the utility model can realize accurate control of the height of a measured liquid column and ensure the consistency of height measurement of the liquid column and the accuracy of a viscosity measurement result.

Description

Technical Field

[0001] This utility model belongs to the field of viscosity measurement, and specifically relates to a viscometer. Background Technology

[0002] As is well known, viscosity is one of the most important physical properties of petroleum products. Viscosity measurement is of great significance in many aspects for marine heavy fuel oil, lubricant additives and various petroleum products.

[0003] First, inaccurate combustion performance assessments can lead to problems. Viscosity directly affects fuel atomization quality; excessively high viscosity results in incomplete combustion, increasing carbon deposits and pollutant emissions, while excessively low viscosity may affect fuel pump lubrication. Second, it impacts the design of the delivery system. The pipe dimensions, heater power, and pump selection for marine fuel systems must all be based on viscosity data, especially in low-temperature environments where ensuring fuel flowability is crucial.

[0004] Methods for measuring petroleum viscosity mainly include capillary kinematic viscosity measurement, rotational viscosity measurement, falling ball viscosity measurement, and vibration viscometers. Among these, the gravity-type glass capillary method is the most accurate and widely used method currently available. However, petroleum is highly viscous and dark in color. When measuring this type of sample, it is difficult to control the liquid column height during the measurement process due to its color and viscosity, resulting in low repeatability and accuracy of the measurement data. Utility Model Content

[0005] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a viscometer that can achieve precise control of the liquid column height, ensure the consistency of liquid column height measurement, and ensure the accuracy of viscosity measurement results.

[0006] The technical solution of this utility model is as follows:

[0007] A viscometer includes: a horizontal arm; an inclined arm, one end of which is connected to the horizontal arm at a turning point, wherein a first measuring element is provided at the turning point for recording a first height of the sample liquid column, and an injection port is provided at the end of the horizontal arm away from the turning point; a vertical arm, one end of which is connected to the other end of the inclined arm, wherein a second measuring element and a third measuring element are provided on the vertical arm for measuring the time it takes for the sample to flow through; the horizontal arm, the inclined arm, and the vertical arm all have interconnected sample flow paths inside, and a vertical tube is provided inside the end of the horizontal arm.

[0008] Preferably, the angle between the centerline of the cross arm and the horizontal line is a small acute angle.

[0009] Preferably, the injection port is sealed during sample injection.

[0010] Preferably, a measuring bulb is provided between the second measuring element and the third measuring element of the vertical arm, and a buffer space is provided inside the measuring bulb.

[0011] Preferably, a reinforcing post is provided between the end of the horizontal arm near the injection port and the connection between the inclined arm and the vertical arm.

[0012] Preferably, a sample inlet cup is provided at the upper end of the injection port.

[0013] This invention provides a viscometer, comprising a horizontal arm; an inclined arm, one end of which is connected to the horizontal arm at a bend, where a first measuring element is located to record the first height of the sample liquid column; an injection port is located at the end of the horizontal arm away from the bend; and a vertical arm, one end of which is connected to the other end of the inclined arm, where a second and third measuring element are located to measure the time it takes for the sample to flow through. The horizontal arm, inclined arm, and vertical arm all have interconnected sample flow paths inside, and a vertical tube is located inside the end of the horizontal arm. Traditional bent-type viscometers typically employ a simple bending design, while the viscometer of this invention improves measurement accuracy and ease of operation by optimizing the connections and shapes of each part. The design of the horizontal arm is primarily to ensure smooth sample flow and prevent the accumulation of cleaning fluid. A clear turning point is set at the connection position of the horizontal arm and the oblique arm, and the first measuring element is installed at this position to record the liquid column height of the sample (i.e., the position of the liquid column tail end). This design clarifies the control point of the liquid column height and avoids the error caused by the uncertainty of the liquid column tail end position in traditional methods. Attached Figure Description

[0014] Figure 1 A schematic diagram of the structure of the viscometer provided by this utility model;

[0015] Figure 2 A comparison chart of experimental results between the viscometer provided by this utility model and a conventional viscometer.

[0016] Explanation of reference numerals in the attached figures

[0017] 1. Horizontal arm; 2. Inclined arm; 3. First measuring element; 4. Vertical arm; 5. Second measuring element; 6. Third measuring element; 7. Vertical tube; 8. Measuring bulb; 9. Reinforcing column; 10. Sample inlet cup. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0019] In the description of this utility model, it should be understood that the terms "upper" and "lower" indicate orientation or positional relationship only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] The inability to accurately determine viscosity using existing technologies is primarily due to inconsistencies in the liquid column height for each sample. These inconsistencies stem from several factors: 1. High sample viscosity and excessively fast sampling, leading to measurement before the predetermined amount is reached; 2. Insufficient or excessive predetermined amount, resulting in a liquid column height that is either too high or too low; 3. Inconsistent sample placement, such as applying the sample to the bottom or the middle of the cup wall, leading to varying sample loss and the amount of sample entering the viscometer, thus affecting the liquid column height; 4. When adding dark-colored samples, the deep color and significant adhesion to the cup wall make it impossible to see the sample tip, thus hindering determination of the appropriate sample amount and liquid column height. Therefore, for high-viscosity, dark-colored, or black samples where the tip is not visible, controlling the liquid column height is difficult, and there is no way to verify it. This results in test data with repeatability and reproducibility far below the requirements of the corresponding standards, rendering it largely unreliable.

[0021] according to Figure 1As shown, this utility model also provides a viscometer, including a horizontal arm 1; an inclined arm 2, one end of which is connected to the horizontal arm 1, with a turning point at the connection position. A first measuring element 3 is provided at this turning point to record the first height of the sample liquid column. An injection port is provided at the end of the horizontal arm 1 away from the turning point; a vertical arm 4, one end of which is connected to the other end of the inclined arm 2. A second measuring element 5 and a third measuring element 6 are provided on the vertical arm 4 to measure the time it takes for the sample to flow through. The horizontal arm 1, inclined arm 2, and vertical arm 4 all have interconnected sample flow paths inside. A vertical tube 7 is provided inside the end of the horizontal arm 1. Traditional bent-type viscometers typically employ a simple bending design, while the viscometer of this utility model improves measurement accuracy and ease of operation by optimizing the connection and shape of each part. The design of the horizontal arm 1 is mainly to ensure smooth sample flow and prevent cleaning fluid retention. A clear turning point is set at the connection position of the horizontal arm 1 and the inclined arm 2, and the first measuring element 3 is installed at this position to record the liquid column height of the sample (i.e., the position of the liquid column tail end). This design clarifies the control point of the liquid column height and avoids the error caused by the uncertainty of the liquid column tail end position in the traditional method.

[0022] This invention improves the functionality of various components of the viscometer to enhance measurement accuracy and efficiency. One end of the horizontal arm 1 is connected to the inclined arm 2 via a bend, while the other end has an injection port. The injection port design allows for direct sample injection into the end of the horizontal arm 1 using a disposable plastic syringe, thus completely avoiding the problem of inconsistent liquid column height caused by sample adhesion to the wall in conventional injection methods. One end of the inclined arm 2 is connected to the horizontal arm 1, and the other end is connected to the vertical arm 4. The first measuring element 3, located at the bend, accurately records the height of the liquid column, ensuring consistent liquid column tail position for each injection. The second measuring element 5 and the third measuring element 6, located on the vertical arm 4, measure the sample flow time. These two measuring elements can be capillary sensors, accurately capturing the sample flow time from top to bottom. It should be noted that a very short vertical tube 7 is provided at the end of the horizontal arm 1 (the lower end of the tube where it intersects with the horizontal arm 1 is called the tail end of the horizontal arm 1). The inner diameter of the vertical tube 7 is adapted to the tip of a disposable plastic syringe, enabling sealed insertion. The syringe tip contacts or is very close to the cavity of the horizontal arm 1, ensuring that the tail end of the liquid column is always fixed at the syringe tip position. The horizontal arm 1 and the inclined arm 2 are connected by a bend, and a first measuring element 3 is set at the bend to accurately record the height of the liquid column. This connection method ensures that the sample will not be stuck or backflowed when entering the inclined arm 2. The inclined arm 2 and the vertical arm 4 are connected by a smooth transition, ensuring that the sample can flow smoothly into the capillary part of the vertical arm 4. The sample flow path inside the vertical arm 4 is connected to the horizontal arm 1 and the inclined arm 2, forming a complete sample flow channel. Therefore, through the above structural improvements, the folded tube viscometer provided by this utility model not only improves the measurement accuracy but also expands its application range, especially when dealing with complex samples.

[0023] In this design, the angle between the centerline of the horizontal arm 1 and the horizontal line is a small acute angle. This design gives the inclined arm 2 a certain slope, ensuring that the sample can flow smoothly from the horizontal arm 1 into the capillary, avoiding measurement errors caused by liquid retention. During cleaning, the cleaning fluid can be smoothly discharged without stagnating at the horizontal arm 1. The slope design of the horizontal arm 1 makes the position of the liquid column tail more clearly defined, enabling precise positioning of the liquid column height, thus effectively solving the measurement error problem caused by inconsistent liquid column height in traditional methods. Therefore, through the design of the inclined horizontal arm 1 and the precise control of the liquid column height, this technical solution not only improves the measurement accuracy of the bent viscometer but also expands its application range, while demonstrating significant advantages in operating efficiency and environmental friendliness.

[0024] Furthermore, the injection port remains sealed during sample injection. When the tip of the disposable plastic syringe is inserted into the small tube of the injection port, a tight seal is formed between the syringe tip and the small tube. This seal ensures that the sample will not leak during injection, and that no air will enter the sample flow path. This sealing condition ensures that the sample will not leak from the injection port during injection, thereby avoiding sample loss and measurement errors. This is especially important for samples with high viscosity, dark colors, or those where the tail end of the liquid column is difficult to visually determine. If the injection port is not sealed, air may enter the sample flow path, forming bubbles. The presence of bubbles will change the flow characteristics of the sample, leading to inaccurate measurement results. The sealing condition effectively prevents air from entering, ensuring the continuity and stability of the sample flow. In the sealed state, the position of the syringe tip remains unchanged, thus ensuring that the tail end of the liquid column is always in the predetermined position. Therefore, maintaining a sealed injection port during sample injection is a key design feature of this novel folded tube viscometer. It not only prevents sample leakage and air ingress but also ensures precise control of the liquid column height, thereby improving measurement accuracy and reliability. This design is particularly suitable for measuring complex samples such as high viscosity and dark black, significantly expanding the application range of viscometers while improving operational convenience and testing efficiency.

[0025] In the embodiments provided by this utility model, a measuring bulb 8 is provided between the second measuring element 5 and the third measuring element 6 on the vertical arm 4, and a buffer space is provided inside the measuring bulb 8. In the viscometer provided by this utility model, the measuring bulb 8 is a key component. It is located between the second measuring element 5 and the third measuring element 6 on the vertical arm 4, and has a buffer space inside. This arrangement ensures that the flow state of the sample flowing through the measuring bulb 8 can be accurately recorded. The buffer space inside the measuring bulb 8 is designed to accommodate the pressure fluctuations generated by the sample during flow. The existence of the buffer space can reduce the measurement error caused by velocity changes or pressure unevenness when the sample flows into the capillary. By setting the measuring bulb 8 with a buffer space on the vertical arm 4, the viscometer of this utility model not only achieves the stabilization of the sample flow state, but also significantly improves the measurement accuracy and applicability. This innovative design, combined with the functional improvements of other components (such as the horizontal arm 1, the inclined arm 2, the injection port, etc.), constitutes a highly efficient, accurate, and environmentally friendly viscosity measurement system, which is particularly suitable for handling the viscosity testing needs of complex samples.

[0026] Furthermore, a reinforcing column 9 is provided at the connection point between the end of the horizontal arm 1 near the injection port and the inclined arm 2 and the vertical arm 4. In the folded tube viscometer of this invention, the reinforcing column 9 is an important auxiliary structure. It connects the end of the horizontal arm 1 near the injection port with the connection points of the inclined arm 2 and the vertical arm 4. This design ensures that the entire viscometer structure is more stable and easier to install and operate. The shape of the reinforcing column 9 can be adjusted according to actual needs, usually in the form of a column or rod. The presence of the reinforcing column 9 does not affect the flow path of the sample; it only serves as structural support.

[0027] The injection port is equipped with a sample inlet cup 10 at its upper end. The sample inlet cup 10 provides a stable space for syringe insertion, preventing deviations in the liquid column position caused by syringe tilting or shaking. This stability is crucial for precise control of the liquid column height, especially when processing complex samples such as high viscosity or dark black samples.

[0028] like Figure 2 As shown, the experimental comparison results between the viscometer provided by this utility model and a conventional viscometer are presented. The specific experimental method is as follows: In a 40°C constant temperature bath, high-viscosity silicone oil was used to compare the measurement results of a conventional folded-tube viscometer and the quantitative viscometer involved in this application. The results are expressed as the timing results of the bulb. The conventional folded-tube viscometer uses a pipette to inject the sample from the mouth of the cup, while the quantitative viscometer uses a disposable syringe inserted into the mouth of the viscometer cup.

[0029] The experimental results show that, based on the measurement results of the two different viscometers, the quantitative viscometer involved in this application has a much better measurement repeatability than the conventional tube viscometer.

[0030] The viscometer provided in this application employs a viscosity measurement method comprising: obtaining a calibration constant; determining a first position reference for the injection port of the sealed sample injection; determining a second position reference for the front end of the sample liquid column, and obtaining the liquid column height based on the second position reference; if the liquid column height is inconsistent after multiple injections, returning to correct the calibration constant; if the liquid column height is consistent after multiple injections, determining that the calibration constant is valid; obtaining the flow time of a first distance along the sample flow path, and obtaining the kinematic viscosity based on the valid calibration constant and the flow time.

[0031] This application first obtains the fixed height h1 required for standard liquid testing by acquiring a calibration constant. Then, it proceeds to the calibration trial and verification stage. Before testing, the accuracy of the calibration constant is determined. This is achieved by injecting the standard liquid multiple times, checking if the height of each injection matches h1. If the heights are consistent, the standard constant is accurate and can be used as an error reference. If the heights are inconsistent, the provided standard constant is inaccurate and needs to be revised to ensure it falls within the error control range of the viscosity measurement method. Next, the third step, sample testing, begins. The sample is injected from the first reference position of the sealed injection port. When the sample gradually reaches the second reference position at the front end, the sample is considered full, and the height h2 of the sample liquid column is obtained. The liquid column height is fixed at h2 for each sample test. By fixing the injection port for each sample test and ensuring that the liquid column height h2 matches the standard liquid height h1, a distance is selected along the flow path to statistically analyze the flow time and calculate the kinematic viscosity.

[0032] The technical solution provided in this application has the following advantages: 1. The sample injection point is fixed each time, avoiding the sample adhesion phenomenon at the viscometer cup mouth caused by conventional injection methods. Compared with the conventional method of adding sample to the viscometer cup mouth, less sample is needed, resulting in less cleaning reagent, faster cleaning speed, higher efficiency, lower testing cost, and greater environmental friendliness. 2. By determining the second position reference of the sample liquid column tip, the tip position of the liquid column can be directly controlled, achieving precise control of the liquid column height. The liquid column height can be controlled at the second position reference each time the sample is injected, making the test results more accurate. 3. Conventional methods use volumetric quantification, but this application uses the second position reference as the injection reference to achieve quantification and control the liquid column height, thereby achieving repeated reproducibility and high measurement accuracy. Therefore, no precision pipette is needed; ordinary plastic syringes can be used for accurate injection, greatly saving equipment costs.

[0033] Another key improvement in this application is the verification of the calibration constant C. The calibration constant C is one of the core parameters for measuring kinematic viscosity using the capillary method. It reflects the geometric characteristics of the viscometer, such as the influence of the capillary inner diameter, length, and liquid column height on the flow time. In the technical solution of this application, the value of the calibration constant C can be determined by using known standard liquid experimental data. To ensure the accuracy of the calibration constant, if the liquid column height is inconsistent after sample injection, it indicates that the calibration constant error is large, which may have a significant impact on the measurement results, and the calibration constant needs to be recalibrated.

[0034] The preset sample sealing injection port position reference includes: the sample path includes an oblique path and a transverse path, the intersection of the oblique path and the transverse path is the turning point, and the end of the transverse path away from the turning point is set as the first position reference; each time the viscosity of the sample is measured, the sample is injected into the sample path through the first position reference, and the sample path is sealed during the injection process.

[0035] During each measurement, the syringe nozzle is aligned with the first position reference to ensure the liquid column is always injected from the same location. During injection, the sample path, especially the lateral path, is sealed to prevent sample leakage or the entry of external air. Once the syringe is inserted through the first position reference, its nozzle seals the main lateral path inlet, forming a closed system. This dual positioning using both the first and second position references ensures consistency in the liquid column height after each injection. Therefore, the technical solution provided in this application achieves precise control of the liquid column height through this dual positioning, avoiding errors caused by inconsistent liquid column heights in traditional methods. Simultaneously, the sample is injected directly from the first position reference (the end of the lateral path), avoiding the phenomenon of sample adhering to the cup rim in traditional methods, reducing sample loss, lowering testing costs, and improving testing efficiency. Furthermore, precise control of the liquid column height ensures the validity of the calibration constant C, and allows for re-verification of the calibration constant's reliability even when the liquid column height is inconsistent. These two measures improve the accuracy of kinematic viscosity measurement, making it particularly suitable for measuring high-viscosity, dark-colored, or opaque samples, and solving the problem of visually inspecting the liquid column tail end in traditional methods. Meanwhile, the technical solution of this application also boasts strong operational convenience. The design of the first position reference simplifies the operation steps; simply aligning the syringe tip with the first position reference is sufficient for sample injection. It also supports both manual and automatic injection modes to meet testing needs in different scenarios. Therefore, this technical solution, by defining a first and second position reference, combined with a closed sample path design and calibration constant verification, achieves a highly consistent sample liquid column. This design not only improves measurement accuracy but also reduces sample loss and testing costs, making it particularly suitable for high-viscosity, dark-colored, or opaque samples. Furthermore, it supports both manual and automated operation, demonstrating broad application prospects.

[0036] In this embodiment, determining the second position reference at the front end of the sample liquid column and obtaining the liquid column height based on the second position reference includes: setting the end of the lateral path near the turning point as the second position reference for stopping sample addition; the sample path includes a vertical path, which is sequentially connected to the oblique path and the lateral path; and calculating the liquid column height based on the vertical distance between the second position reference and the end point of the vertical path.

[0037] The sample path includes a diagonal path, a lateral path, and a vertical path, which are connected sequentially. A second position reference is set at the end of the lateral path near the turning point. This reference is used to determine the endpoint of the liquid column. The endpoint of the vertical path serves as a reference point for calculating the liquid column height. The second position reference is equivalent to the height of a reference plane, and the difference between the height of the endpoint of the vertical path relative to the same reference plane and the second position reference is the liquid column height. The second position reference can be set using a scale line or through a sensor. Therefore, this technical solution achieves accurate calculation of the liquid column height by defining and determining the second position reference (the end of the lateral path near the turning point) and combining it with the reference point at the endpoint of the vertical path. This design not only reduces human error but is also particularly suitable for measuring high-viscosity, dark-colored, or opaque samples. It supports both manual and automated operation, featuring high precision, high efficiency, and reliability, providing a new solution for the field of viscosity measurement.

[0038] In this design, the transverse path forms a small angle with the horizontal plane. This small angle (not perfectly horizontal) ensures smooth liquid flow under gravity, preventing liquid stagnation in the transverse arm 1 and facilitating complete drainage of the cleaning solution. The small angle design of the transverse path allows the liquid to flow naturally under gravity, avoiding liquid stagnation that can occur in traditional horizontal paths. This design not only facilitates sample flow but also ensures complete drainage of the cleaning solution, reducing the possibility of liquid residue during cleaning, improving cleaning efficiency, reducing the amount of cleaning reagent required, and lowering testing costs and environmental burden. Furthermore, the small angle design prevents liquid stagnation in the transverse arm 1, ensuring consistent liquid column height after each injection. This consistency improves the repeatability and reproducibility of measurement results, thereby enhancing overall measurement accuracy. Whether for low-viscosity or high-viscosity samples, the small angle design guarantees smooth liquid flow.

[0039] In this embodiment, obtaining the calibration constant includes: determining the known kinematic viscosity of the standard liquid as the first kinematic viscosity; selecting a segment of the vertical path as the second distance; recording the time it takes for the standard liquid to flow through the second distance, which is the first standard time; and calculating the standard constant based on the second distance and the first standard time. This application reduces errors caused by uncertain path lengths by selecting a fixed second distance on the vertical path and accurately recording the time it takes for the standard liquid to flow through that path, resulting in a more accurate and reliable calibration constant. This technical solution focuses the calibration process on the vertical path, avoiding the complexity of fully calibrating the entire sample path as required by traditional methods. Calibration can be completed simply by recording the time it takes for the standard liquid to flow through the second distance, making the operation simple and efficient. Furthermore, by only adjusting the selection of the second distance and the standard liquid, it can adapt to measurement needs across different viscosity ranges, making it particularly suitable for measuring high-viscosity, dark-colored, or opaque samples, where the liquid column height may be difficult to control accurately in traditional calibration methods. The fixed second distance and the precise recording of the first standard time ensure consistency of conditions during each calibration process. This consistency improves the reliability of the calibration constant, thereby enhancing the repeatability and reproducibility of subsequent measurement results. Furthermore, automated control systems, such as liquid level sensors, can be used to record the first standard time, reducing human observation errors and improving the automation and accuracy of the measurement process.

[0040] It should be noted that the calibration constant is determined according to the formula... It is determined by, where C is the calibration constant. —Capillary radius, g—gravitational acceleration, h—liquid column height, V—volume of sample flowing through the second distance, t—flow time, i.e., the time it takes for the sample to flow through the second distance, i.e., the time to fill volume V, L—capillary length, i.e., the vertical distance between the second position reference on the horizontal arm 1 and the vertical path end. Therefore, the calibration constant depends on the capillary's inner diameter, length, gravitational acceleration, liquid height, and fluid volume. For the same capillary, the capillary's inner diameter, length, gravitational acceleration, and fluid volume are all determined. As long as the liquid column height remains constant, the calibration constant is also determined. Therefore, when calibrating the constant, it is also necessary to ensure that the tail end of the sample liquid column is also at the second position reference.

[0041] Preferably, obtaining the flow time of the first distance on the sample flow path includes: setting a buffer space on the vertical path of the sample; the flow time is calculated based on the time it takes for the sample to enter the buffer space and the time it takes for the sample to flow out of the buffer space.

[0042] In this embodiment, a buffer space is designed along the vertical path of the sample. This space is located at a specific position along the flow path. The function of the buffer space is to temporarily contain part of the sample, so as to accurately record the time of sample entry and exit. When the sample flows into the vertical path from above, the time when the sample reaches the inlet of the buffer space is recorded by a liquid level sensor or other detection device, denoted as the first time point t1. When the sample continues to flow and leaves the buffer space, the time when the sample completely flows out of the buffer space is recorded again by another liquid level sensor or other detection device, denoted as the second time point. Finally, the flow time of the sample over the first distance is calculated based on the time difference between the sample entering and exiting the buffer space. Therefore, the design of the buffer space ensures the stability and controllability of the sample flow process. By recording the time of sample entry and exit from the buffer space separately, the flow time of the sample over the first distance can be calculated more accurately, reducing time measurement errors caused by path complexity or sample characteristics. For high-viscosity samples, the flow rate is slow and stagnation may occur in the path. The design of the buffer space can effectively alleviate these problems, ensuring the continuity and stability of the flow process, and is particularly suitable for the measurement of dark or opaque samples.

[0043] It should be noted that all the provided viscometers can be used with the viscosity measurement methods described above. Similarly, the viscosity measurement methods can also be implemented using viscometers. The two methods are interchangeable and will not be elaborated further here.

[0044] The embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other.

[0045] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A viscometer, characterized in that, include: Cross arm (1); An inclined arm (2) is connected to a horizontal arm (1) at one end. The connection position is a turning point. A first measuring element (3) is provided at the turning point. The first measuring element (3) is used to record the first height of the sample liquid column. An injection port is provided at the end of the horizontal arm (1) away from the turning point. A vertical arm (4) is provided, one end of which is connected to the other end of the inclined arm (2). A second measuring element (5) and a third measuring element (6) are provided on the vertical arm (4). The second measuring element (5) and the third measuring element (6) are used to measure the time it takes for the sample to flow through. The horizontal arm (1), the inclined arm (2) and the vertical arm (4) are all provided with interconnected sample flow paths, and the end of the horizontal arm (1) is provided with a vertical tube (7).

2. The viscometer according to claim 1, characterized in that, The angle between the centerline of the horizontal arm (1) and the horizontal line is a small acute angle.

3. The viscometer according to claim 2, characterized in that, The injection port is sealed during sample injection.

4. The viscometer according to claim 3, characterized in that, A measuring bulb (8) is provided between the second measuring element (5) and the third measuring element (6) of the vertical arm (4), and a buffer space is provided inside the measuring bulb (8).

5. The viscometer according to claim 4, characterized in that, A reinforcing column (9) is provided between the end of the horizontal arm (1) near the injection port and the connection between the inclined arm (2) and the vertical arm (4).

6. The viscometer according to claim 5, characterized in that, The upper end of the injection port is provided with a sample inlet cup (10).

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