Online rotary viscometer

Abstract

The utility model provides an on-line rotary viscometer, which belongs to the technical field of viscosity measuring instruments and comprises a measuring chamber, a rotor, a stator, a driving component and a detecting piece, and the measuring chamber is suitable for being communicated with a pipeline to be measured; the rotor is arranged in the measuring chamber, the rotor is of a cylinder structure with a cavity inside, and a plurality of liquid inlet grooves communicated with the cavity are formed in the side wall of the rotor; the stator is rotatably arranged in the cavity, and a medium channel is arranged between the stator and the rotor; the driving assembly is connected with the rotor, a medium flowing through the medium channel can rotate around the stator under the rotating action of the rotor, and the rotating medium can drive the stator to rotate or drive the stator to generate a rotating trend; the detection piece detects the viscous torque borne by the stator during rotation. According to the online rotary viscometer provided by the utility model, the rotation of the stator is driven by a medium without friction loss caused by a transmission process, so that the viscous torque during the rotation of the stator is accurately obtained, and the accuracy of a result is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of viscosity measuring instruments, and particularly relates to an on-line rotary viscometer. Background Art

[0002] Viscosity is a performance index reflecting the internal friction force in a fluid, which is an inherent property of the fluid. The measurement of viscosity is of great significance for measuring the quality of the fluid.

[0003] Traditional rotary viscometers need to take samples regularly from positions such as buffer tanks or stirring tanks during the production process, place them in containers with a certain volume for viscosity measurement. This method is cumbersome to operate, limited by the technical level of the inspectors, and at the same time, the measurement results have hysteresis and certain errors.

[0004] Therefore, at the present stage, an on-line viscometer is used for measurement. The patent document CN117517136 discloses a magnetic drive rotary viscometer. The driving mechanism directly drives the inner magnet to rotate, and the inner magnet drives the outer magnet and the measuring head to rotate through magnetic drive. The resistance when the measuring head rotates is converted into the viscosity of the fluid. However, since the rotation of the measuring head is driven by the driving mechanism, and there is friction loss during the transmission of the driving mechanism, it will affect the accurate calculation of the resistance of the measuring head, and further affect the detection result of the viscosity. Summary of the Utility Model

[0005] Therefore, the utility model aims to solve the defect that in the prior art, the rotation of the measuring head is driven by a driving mechanism, and there is friction loss during the transmission of the driving mechanism, which will affect the accurate calculation of the resistance of the measuring head, and further affect the detection result of the viscosity, so as to provide an on-line rotary viscometer.

[0006] To solve the above technical problems, the utility model provides an on-line rotary viscometer, comprising:

[0007] A measuring chamber adapted to communicate with a pipeline to be measured;

[0008] A rotor disposed inside the measuring chamber. The rotor is a cylindrical structure with a cavity inside, and a plurality of liquid inlet grooves communicating with the cavity are provided on the side wall of the rotor;

[0009] A stator rotatably disposed in the cavity, and there is a medium channel between the stator and the rotor;

[0010] A driving assembly connected to the rotor. The driving assembly is adapted to drive the rotor to rotate. The medium flowing through the medium channel can rotate around the stator under the rotation of the rotor, and the rotating medium can drive the stator to rotate or drive the stator to have a tendency to rotate;

[0011] A detecting member for detecting the viscous torque received by the stator during rotation.

[0012] Optionally, it further includes a magnetic coupling, and the magnetic coupling includes:

[0013] An inner magnet disposed in the cavity, and the inner magnet is coaxially connected to the stator;

[0014] An outer magnet disposed outside the measurement chamber, the outer magnet is connected to the detecting member, and the inner magnet and the outer magnet are separated by a non-magnetic member, and the outer magnet is used to receive the rotational torque of the inner magnet.

[0015] Optionally, the inner magnet is disposed in the cavity, and the outer diameter dimension of the inner magnet is the same as the outer diameter dimension of the stator.

[0016] Optionally, one end of the cavity is an open end and the other end is a closed end. One end of the stator is rotatably connected to the inner side wall of the closed end of the cavity, and the other end of the stator is rotatably connected to the side wall of the measurement chamber.

[0017] Optionally, the stator is rotatably connected to the cavity and the measurement chamber through bearings respectively.

[0018] Optionally, the bearing is a jewel bearing, and both ends of the stator have pointed structures, and the pointed structures are arranged in cooperation with the jewel bearings.

[0019] Optionally, the driving assembly includes:

[0020] A driving member disposed outside the measurement chamber;

[0021] A transmission shaft, one end of which is connected to the driving member, and the other end extends into the measurement chamber and is connected to the rotor, and the driving member drives the rotor to rotate through the transmission shaft.

[0022] Optionally, the measurement chamber has a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are adapted to be connected to the pipeline to be measured; during viscosity detection, the liquid inlet is arranged downward and the liquid outlet is arranged upward.

[0023] Optionally, the liquid inlet grooves are arranged in a shape following the shape of the rotor, and a plurality of the liquid inlet grooves are uniformly arranged on the side wall of the rotor.

[0024] Optionally, the detecting member is a torque sensor.

[0025] The technical solution of the present utility model has the following advantages:

[0026] 1. The online rotary viscometer provided by the present utility model includes a measurement chamber, a rotor, a stator, a driving assembly, and a detecting member. The rotor is disposed inside the measurement chamber, the stator is rotatably disposed in the cavity of the rotor, the detecting member is used to detect the viscous torque received when the stator rotates, and the driving assembly can drive the rotor to rotate. During viscosity detection, the measurement chamber is communicated with the pipeline to be measured. After the medium enters the measurement chamber, it enters the medium channel through the liquid inlet groove. When the rotor rotates, it drives the medium to flow stably around the surface of the stator, forming a laminar flow state. The rotating medium causes the stator to receive a certain torque, and the stator rotates or has a tendency to rotate.

[0027] By connecting the measurement chamber to the pipeline to be measured, the real-time monitoring of the liquid viscosity is realized. Moreover, the rotation of the stator is directly driven by the medium, and the viscosity of the medium is directly reflected in the rotation of the stator. There is no friction loss caused by the transmission process in the middle. By detecting the rotation of the stator, the viscous torque when the stator rotates is accurately obtained, and then the viscosity value is obtained, improving the accuracy of the result.

[0028] 2. The online rotary viscometer provided by the present utility model further includes a magnetic coupling. The magnetic coupling includes an inner magnet and an outer magnet. The inner magnet is disposed in the cavity and coaxially connected to the stator. The outer magnet is disposed outside the measurement chamber and connected to the detecting member, and the two are separated by a non-magnetic member. The torque received by the stator is transmitted to the detecting member in a non-contact form, avoiding the transmission loss in the middle and improving the detection accuracy.

[0029] 3. In the online rotary viscometer provided by the present utility model, the inner magnet is disposed in the cavity, and the outer diameter dimension of the inner magnet is the same as that of the stator, so that the rotation of the inner magnet is not only driven by the stator, but also directly driven by the viscous torque of the medium, and the effect of transmitting torque is better.

[0030] 4. In the online rotary viscometer provided by the present utility model, one end of the cavity is an open end, and the other end is a closed end. The open end is convenient for the arrangement of the stator and the inner magnet, and the closed end is also beneficial to the rotational installation of the stator. The two ends of the stator are respectively rotatably connected to the closed end and the side wall of the measurement chamber, improving the stability of the stator and enabling the stator to rotate under the action of the rotating medium.

[0031] 5. In the online rotary viscometer provided by the present utility model, both between the stator and the cavity and between the stator and the measurement chamber are rotatably connected by bearings. The bearings are gemstone bearings. Gemstone bearings have the characteristics of long life, excellent wear resistance, and high sensitivity. The friction coefficient between them and steel parts is extremely small, which can reduce the friction loss in the transmission process of the viscous torque from the stator to the detecting member and improve the detection accuracy.

[0032] 6. The on-line rotary viscometer provided by the utility model has a measuring chamber with a liquid inlet and a liquid outlet. During viscosity detection, the liquid inlet is arranged downward and the liquid outlet is arranged upward to ensure that the fluid completely fills the measuring chamber and avoid affecting the detection accuracy of viscosity.

[0033] 7. The on-line rotary viscometer provided by the utility model has a liquid inlet groove arranged conforming to the shape of the rotor, which is convenient for the medium to enter the medium channel. Description of the Drawings

[0034] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0035] Figure 1 It is a schematic structural diagram of an embodiment of the on-line rotary viscometer provided in the embodiment of the utility model;

[0036] Figure 2 For Figure 1 the sectional structural diagram in;

[0037] Figure 3 For Figure 1 the structural diagram of the cooperation between the rotor and the stator in;

[0038] Figure 4 For Figure 3 the sectional structural diagram of;

[0039] Figure 5 For Figure 2 the structural diagram of the stator in;

[0040] Figure 6 For Figure 2 the partial enlarged schematic Figure Ⅰ .

[0041] Explanation of the Reference Numerals in the Drawings:

[0042] 1. Measuring chamber; 2. Bearing; 3. Rotor; 4. Cavity; 5. Liquid inlet groove; 6. Stator; 7. Medium channel; 8. Driving assembly; 9. Detection piece; 10. Magnetic coupling; 11. Inner magnet; 12. Outer magnet; 13. Non-magnetic part; 14. Pointed structure; 15. Driving piece; 16. Transmission shaft; 17. Liquid inlet; 18. Liquid outlet; 19. Rotating rod; 20. Bracket. Detailed Embodiments

[0043] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative work shall fall within the protection scope of the present utility model.

[0044] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0045] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0046] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0047] The online rotary viscometer provided in this embodiment realizes the real-time monitoring of the fluid viscosity and avoids the lag of the measurement results.

[0048] Such as Figures 1 to 5As shown, a specific implementation of the online rotary viscometer provided by this embodiment includes a measurement chamber 1, a rotor 3, a stator 6, a drive assembly 8, and a detector 9. The measurement chamber 1 is adapted to communicate with a pipeline to be measured; the rotor 3 is disposed inside the measurement chamber 1. The rotor 3 is a cylindrical structure with a cavity 4 inside. A plurality of liquid inlet grooves 5 communicating with the cavity 4 are provided on the side wall of the rotor 3; the stator 6 is rotatably disposed in the cavity 4, and a medium channel 7 is formed between the stator 6 and the rotor 3; the drive assembly 8 is connected to the rotor 3, and the drive assembly 8 is adapted to drive the rotor 3 to rotate. The medium flowing through the medium channel 7 can rotate around the stator 6 under the rotation of the rotor 3. The rotating medium can drive the stator 6 to rotate, or drive the stator 6 to have a tendency to rotate; the detector 9 is used to detect the viscous torque received when the stator 6 rotates.

[0049] During viscosity detection, where the medium is a liquid medium, the measurement chamber 1 is communicated with the pipeline to be measured. After the medium enters the measurement chamber 1, it enters the medium channel 7 through the liquid inlet grooves 5. When the rotor 3 rotates, it drives the medium to flow stably around the surface of the stator 6, forming a laminar flow state. The rotating medium causes the stator 6 to receive a certain torque, and the stator 6 rotates or has a tendency to rotate.

[0050] By connecting the measurement chamber 1 to the pipeline to be measured, real-time monitoring of the liquid viscosity is achieved. Moreover, the rotation of the stator 6 is directly driven by the medium, and the viscosity of the medium is directly reflected in the rotation of the stator 6. There is no frictional loss caused by the transmission process in the middle. By detecting the rotation of the stator 6, the viscous torque when the stator 6 rotates is accurately obtained, and then the viscosity value is obtained, improving the accuracy of the result.

[0051] Specifically, the drive assembly 8 and the detector 9 are disposed outside the measurement chamber 1 to prevent the liquid from entering the drive assembly 8 and the detector 9 and affecting the drive and detection effects.

[0052] A specific implementation of the measurement chamber 1. The measurement chamber 1 is a tubular structure with both ends closed. An inlet 17 and an outlet 18 are provided on the side wall of the measurement chamber 1. The inlet 17 and the outlet 18 are adapted to be connected to the pipeline to be measured. When viscosity detection is required, the measurement chamber 1 is installed in the pipeline to be measured; both ends of the measurement chamber 1 are detachably arranged structures, which is convenient for the installation of the internal rotor 3 and stator 6. For example, the sealing plates on both sides are fixedly connected to the pipe body therebetween by screws.

[0053] An improved implementation of the measurement chamber 1, as Figure 2 shown, during viscosity detection, the inlet 17 is arranged downward, and the outlet 18 is arranged upward to ensure that the fluid completely fills the measurement chamber 1 and avoid affecting the detection accuracy of the viscosity.

[0054] The online rotary viscometer provided in this embodiment has the detection member 9 being a torque sensor. Specifically, the detection member 9 is a static torque sensor that detects the torque of the stator 6 and transmits it. Since the detection shaft of the static torque sensor does not rotate but only undergoes torsional deformation, its structure is simple and its performance is stable. Using a static torque sensor improves the accuracy and stability of the detection data.

[0055] As Figure 3 shown, in the online rotary viscometer provided in this embodiment, the liquid inlet groove 5 is arranged following the shape of the rotor 3, and a plurality of the liquid inlet grooves 5 are evenly distributed on the side wall of the rotor 3, facilitating the medium to enter the medium channel 7. Specifically, the liquid inlet groove 5 is an inclined groove-shaped structure arranged along the rotor 3. Additionally, as an alternative embodiment, the liquid inlet groove 5 can also be parallel to the axis of the rotor 3 or can be a spiral-shaped groove structure.

[0056] As Figure 2 and Figure 6 shown, the online rotary viscometer provided in this embodiment further includes a magnetic coupling 10, which includes an inner magnet 11 and an outer magnet 12. The inner magnet 11 is arranged in the cavity 4 and is coaxially connected to the stator 6; the outer magnet 12 is arranged outside the measurement chamber 1 and is connected to the detection member 9. The inner magnet 11 and the outer magnet 12 are separated by a non-magnetic member 13, and the outer magnet 12 is used to receive the rotational torque of the inner magnet 11.

[0057] The setting of the magnetic coupling 10 transmits the torque received by the stator 6 to the detection member 9 in a non-contact form, avoiding intermediate transmission losses and improving the detection accuracy. Specifically, both the inner magnet 11 and the outer magnet 12 are cylindrical structures.

[0058] Specifically, as Figure 2 shown, the detection member 9 is fixed on the bracket 20, and the bracket 20 is fixed on the measurement chamber 1; the non-magnetic member 13 can be a non-magnetic steel plate.

[0059] As Figure 2 shown, in the online rotary viscometer provided in this embodiment, the inner magnet 11 is arranged in the cavity 4, and the outer diameter dimension of the inner magnet 11 is the same as the outer diameter dimension of the stator 6, such that the rotation of the inner magnet 11 is not only driven by the stator 6 but also directly driven by the viscous torque of the medium, resulting in a better torque transmission effect. Additionally, as an alternative embodiment, the inner magnet 11 can also not be arranged in the cavity 4.

[0060] As Figure 4As shown in the figure, the on-line rotary viscometer provided by this embodiment has one end of the cavity 4 as an open end and the other end as a closed end. One end of the stator 6 is rotatably connected to the inner side wall of the closed end of the cavity 4, and the other end of the stator 6 is rotatably connected to the side wall of the measurement chamber 1. The open end facilitates the setting of the stator 6 and the inner magnet 11, and the closed end is also beneficial to the rotational installation of the stator 6. The two ends of the stator 6 are respectively rotatably connected to the closed end and the side wall of the measurement chamber 1, improving the stability of the stator 6, so that the stator 6 can rotate under the action of the rotating medium.

[0061] A specific implementation of the stator 6 is that the stator 6 is of a cylindrical structure, which can be a hollow structure to facilitate the driving of the stator 6 by the medium. Rotating rods 19 are coaxially arranged at both ends of the stator 6 respectively. The inner magnet 11 has a through hole, and the rotating rod 19 on one side passes through the through hole and is rotatably connected to the side wall of the measurement chamber 1.

[0062] As Figure 5 As shown in the figure, for the on-line rotary viscometer provided by this embodiment, both between the stator 6 and the cavity 4 and between the stator 6 and the measurement chamber 1 are rotatably connected through bearings 2.

[0063] Specifically, the bearing 2 is a gem bearing. The two ends of the stator 6 have pointed structures 14, and the pointed structures 14 are arranged in cooperation with the gem bearings. Gem bearings have the characteristics of high long life, excellent wear resistance, and high sensitivity. The friction coefficient between them and steel parts is extremely small, which can reduce the friction loss in the transmission process of the viscous torque from the stator 6 to the detection part 9 and improve the detection accuracy. Specifically, the pointed structure 14 is arranged at the end of the rotating rod 19, and the pointed structure 14 has a clearance fit with the tapered groove of the gem bearing.

[0064] As Figure 2 As shown in the figure, for the on-line rotary viscometer provided by this embodiment, the driving assembly 8 includes a driving part 15 and a transmission shaft 16. The driving part 15 is arranged outside the measurement chamber 1; one end of the transmission shaft 16 is connected to the driving part 15, and the other end of the transmission shaft 16 extends into the measurement chamber 1 and is connected to the rotor 3. The driving part 15 drives the rotor 3 to rotate through the transmission shaft 16.

[0065] Specifically, the driving part 15 can be a stepping motor. The stepping motor has the characteristics of high precision, no need for position feedback, high torque low-speed drive, simple control, and low noise, and the control of the rotor 3 is more accurate and stable. The transmission shaft 16 and the output shaft of the driving part 15 are rotatably connected through a coupling; the transmission shaft 16 and the measurement chamber 1 are rotatably connected through a bearing.

[0066] For the on-line rotary viscometer provided by this embodiment, sealing rings are provided between the transmission shaft 16 and the measurement chamber 1 and between the sealing plate and the tube body of the measurement chamber 1 to prevent the leakage of liquid medium from affecting the detection results.

[0067] Working process of the on-line rotary viscometer: Install the viscometer in the pipeline to be measured. The driving component 8 drives the rotor 3 to be in a rotating state. The rotor 3 maintains a certain rotational speed and rotates stably. The medium in the pipeline to be measured enters the measuring chamber 1 through the liquid inlet 17. Then, the medium enters the medium channel 7 through the liquid inlet groove 5. Under the rotation of the rotor 3, the medium in the medium channel 7 flows stably around the stator surface. At the same time, the medium can flow out from the open end of the rotor 3 and the liquid inlet groove 5 into the next section of the pipeline to be measured. The stator 6 generates a rotational or rotational motion tendency under the viscous torque of the medium. Through the magnetic force transmission form of the magnetic coupling 10, the detecting component 9 obtains the torque. The detecting component 9 performs detection and outputs a torque signal, and the viscosity value is calculated through processing.

[0068] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present utility model.

Claims

1. An online rotary viscometer, characterized in that: Comprising: A measurement chamber (1), adapted to communicate with a pipeline to be measured; A rotor (3), disposed inside the measurement chamber (1), the rotor (3) being a cylindrical structure with a cavity (4) inside, and a plurality of liquid inlet grooves (5) communicating with the cavity (4) being provided on the side wall of the rotor (3); A stator (6), rotatably disposed inside the cavity (4), a medium channel (7) being provided between the stator (6) and the rotor (3); A driving assembly (8), connected to the rotor (3), the driving assembly (8) being adapted to drive the rotor (3) to rotate, and the medium flowing through the medium channel (7) can rotate around the stator (6) under the rotation of the rotor (3), and the rotating medium can drive the stator (6) to rotate or drive the stator (6) to have a tendency to rotate; A detection member (9), for detecting the viscous torque received when the stator (6) rotates.

2. The online rotary viscometer according to claim 1, wherein It further includes a magnetic coupling (10), and the magnetic coupling (10) includes: An inner magnet (11), disposed inside the cavity (4), the inner magnet (11) being coaxially connected to the stator (6); An outer magnet (12), disposed outside the measurement chamber (1), the outer magnet (12) being connected to the detection member (9), the inner magnet (11) and the outer magnet (12) being separated by a non-magnetic member (13), and the outer magnet (12) being adapted to receive the rotational torque of the inner magnet (11).

3. The online rotary viscometer according to claim 2, characterized in that, The inner magnet (11) is disposed inside the cavity (4), and the outer diameter dimension of the inner magnet (11) is the same as the outer diameter dimension of the stator (6).

4. The online rotary viscometer according to claim 1, characterized in that, One end of the cavity (4) is an open end, and the other end is a closed end. One end of the stator (6) is rotatably connected to the inner side wall of the closed end of the cavity (4), and the other end of the stator (6) is rotatably connected to the side wall of the measurement chamber (1).

5. The online rotary viscometer according to claim 1, characterized in that, Both between the stator (6) and the cavity (4) and between the stator (6) and the measurement chamber (1) are rotatably connected through bearings (2).

6. The online rotary viscometer according to claim 5, characterized in that, The bearing (2) is a gem bearing, and both ends of the stator (6) have pointed structures (14), and the pointed structures (14) are cooperatively arranged with the gem bearings.

7. The online rotary viscometer according to claim 1, characterized in that, The driving assembly (8) includes: A driving member (15), disposed outside the measurement chamber (1); A transmission shaft (16), one end of which is connected to the driving member (15), and the other end extends into the measurement chamber (1) and is connected to the rotor (3), and the driving member (15) drives the rotor (3) to rotate through the transmission shaft (16).

8. The online rotary viscometer according to claim 1, characterized in that, The measurement chamber (1) has a liquid inlet (17) and a liquid outlet (18), and the liquid inlet (17) and the liquid outlet (18) are adapted to be connected to the pipeline to be measured; during viscosity detection, the liquid inlet (T7) is arranged downward, and the liquid outlet (18) is arranged upward.

9. The online rotary viscometer according to claim 1, wherein, The liquid inlet grooves (5) are arranged in a shape following that of the rotor (3), and a plurality of the liquid inlet grooves (5) are evenly distributed on the side wall of the rotor (3).

10. The online rotary viscometer according to any one of claims 1-9, characterized in that, The detection member (9) is a torque sensor.

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