A rotational viscometer and a method for detecting the viscosity of surfactants.

Abstract

This invention relates to the field of viscosity detection technology, and discloses a rotational viscometer and a method for detecting surfactant viscosity. The invention utilizes a multi-axis leveling mechanism to ensure the horizontal state of the detection mounting frame and the rotational drive mechanism during position adjustment. The rotational drive mechanism outputs a rotational speed through a drive connector, which rotates within the protective frame to detect the viscosity of the surfactant in the measurement container. The leveling of the rotational drive mechanism effectively prevents rotor offset during rotation, thus ensuring the accuracy of the viscosity of the solution obtained from the rotor's output rotational speed. Furthermore, the protective frame ensures that the rotor's rotation occurs within the frame, limiting the detection space and enabling more efficient acquisition of the solution's viscosity.

Description

Technical Field

[0001] This invention relates to the field of viscosity detection technology, specifically to a rotational viscometer and a method for detecting the viscosity of surfactants. Background Technology

[0002] A rotational viscometer is a widely used instrument for measuring fluid viscosity. Its basic principle is to determine the fluid's viscosity by measuring the resistance encountered when a rotor rotates within the fluid. This instrument has important applications in chemical, food, pharmaceutical, and petroleum industries, especially in the viscosity detection of surfactant solutions, where the rotational viscometer provides rapid and accurate measurement results. Surfactants are molecules with a hydrophilic head and a hydrophobic tail, which can significantly reduce the surface tension of liquids and are widely used in detergents, emulsifiers, thickeners, and other applications. The viscosity characteristics of surfactant solutions have a significant impact on their application effects; therefore, accurate viscosity measurement is crucial.

[0003] During measurement, the rotor is immersed in the liquid to be measured and rotates at a constant speed. The viscous resistance of the liquid on the rotor causes a change in torque, and the viscosity of the liquid can be calculated by measuring the torque value. However, this measurement method requires a high degree of stability in the instrument's mechanical structure, especially the rotor's levelness and concentricity must be strictly controlled. If the rotor deviates horizontally during rotation, it will cause deviations in the measurement results and affect the accuracy of the data.

[0004] In practical applications of rotational viscometers, horizontal offset is a common source of error. Horizontal offset refers to the rotor's failure to maintain a perfectly horizontal position during rotation, instead exhibiting a certain angle of tilt. This offset can be caused by various factors, such as improper instrument mounting, insufficient rotor machining precision, bearing wear, or mechanical vibration. When the rotor is horizontally offset, its contact area with the liquid and the force distribution change, causing the torque measurement value to deviate from the true value. Furthermore, horizontal offset can exacerbate rotor mechanical wear, further reducing measurement accuracy. Over long-term use of rotational viscometers may lead to an accumulation of horizontal offset problems due to loose bearings or rotor deformation, resulting in a cumulative increase in measurement error. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a rotational viscometer and a method for detecting the viscosity of surfactants.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] A rotational viscometer includes a horizontal adjustment base, a connecting column, and a detection housing. The horizontal adjustment base includes a support base and a leveling base, which are connected by a plurality of leveling components. The support base can provide a support plane at any position, and each leveling component can drive the leveling base to move relative to the support base and drive the leveling base to a horizontal state. The connecting column is fixed at both ends to the leveling base and the detection housing, respectively. The detection housing is provided with a multi-axis leveling mechanism and a detection mounting frame, which can be kept horizontal under the action of the multi-axis leveling mechanism. A rotation drive mechanism is installed inside the detection mounting frame, and the drive joint of the rotation drive mechanism extends through the bottom end of the detection housing. A protective frame is also provided at the bottom end of the detection mounting frame, which extends through the bottom end of the detection housing and covers the outside of the drive joint. The drive joint can be connected and fixed to rotors of different specifications, and the selected rotor rotates inside the protective frame under the drive joint.

[0008] Preferably, the bottom end of the support base is provided with a plurality of support blind holes, and a plurality of support springs are provided inside each support blind hole. One end of each support spring is fixed to the bottom of the support blind hole, and the other end of each support spring is fixedly provided with a connecting leg. A limit guide post is provided at the end of the connecting leg near the support spring, and the limit guide post extends into the support blind hole.

[0009] Preferably, each leveling assembly includes a universal joint, a leveling sleeve rod, and a leveling inner rod. The top end of the leveling inner rod extends into the bottom end of the corresponding leveling sleeve rod. The leveling inner rod and the leveling sleeve rod are threaded together. An adjusting collar is provided on the outer side of the leveling inner rod. The bottom end of the leveling inner rod is rotatably connected to the top end of the support base through a bearing. The top end of the leveling sleeve rod is connected to the leveling base through the universal joint. The top end of the leveling base is provided with a plurality of spirit levels.

[0010] Preferably, the connecting column includes a main mounting column and a secondary mounting column, which are slidably connected by a track; a limiting toothed plate is provided on the side of the main mounting column near the secondary mounting column, and a drive shaft is rotatably provided on the side of the secondary mounting column near the main mounting column; a plurality of drive gears are coaxially fixed on the drive shaft, and each drive gear meshes with the limiting toothed plate.

[0011] Preferably, the drive shaft is rotatably connected to the secondary mounting post via several damping rings, and a lifting knob is provided at one end of the drive shaft that extends through the secondary mounting post. By applying force through the lifting knob to overcome the damping effect of each of the damping rings, the drive shaft can be driven to rotate, thereby overcoming the damping effect of the track provided between the main mounting post and the secondary mounting post, and driving relative sliding between the secondary mounting post and the main mounting post.

[0012] Preferably, the multi-axis leveling mechanism includes a connecting outer frame, an adjusting inner frame, and two mounting arms; the connecting outer frame is fixed to the inner wall of the detection housing, and the connecting outer frame is connected to the adjusting inner frame via a primary adjusting unit, which can drive and adjust the angle between the adjusting inner frame and the connecting outer frame; the two mounting arms are respectively fixed to the inner side of the adjusting inner frame, and the detection mounting frame is rotatably connected between the two mounting arms; a secondary adjusting unit is provided on the outer side of one of the mounting arms, which can drive and adjust the angle between the detection mounting frame and the mounting arm.

[0013] Preferably, the structure of the primary adjustment unit is the same as that of the secondary adjustment unit. The primary adjustment unit includes an angle servo motor, an adjustment gear, and a driven gear. The output shaft of the angle servo motor is coaxially fixed with the adjustment gear, and the adjustment gear and the driven gear are meshed. The relative positions of the angle servo motor and the adjustment gear with the connecting outer frame remain constant, and the driven gear is fixed with the adjustment inner frame and its rotation axis is coaxial.

[0014] Preferably, the detection mounting frame includes a connecting top plate, an extension frame, and a mounting base plate, wherein the connecting top plate and the mounting base plate are connected and fixedly connected by the extension frame; the rotary drive mechanism further includes a detection motor, which is fixedly connected to the mounting base plate, and the output end of the detection motor passes through the mounting base plate and is connected and fixedly connected to the drive joint via a rotary joint; a monitor is installed inside the detection motor, which can monitor the output torque and output speed of the detection motor.

[0015] Preferably, the protective frame includes a plurality of protective brackets, the top of each of the protective brackets being fixed to the mounting base plate; the protective brackets can be replaced according to the specifications of the rotor, and the length of the protective bracket used is not less than the length of the rotor used.

[0016] A method for detecting the viscosity of a surfactant, using the aforementioned rotational viscometer, includes the following steps:

[0017] Place the rotational viscometer at any testing position, and use the support base to provide a support plane at the testing position. Adjust each leveling component to drive the leveling base to a horizontal state.

[0018] Adjust the detection housing to the top of the connecting column, determine the viscosity range according to the type of surfactant to be tested, select a rotor of suitable specifications, and fix the rotor to the drive connector.

[0019] Place the surfactant to be tested into the measuring container and place the measuring container on the leveling base;

[0020] Slowly move the detection housing down along the connecting column and insert the rotor into the measuring container;

[0021] During the process of adjusting the leveling base of each leveling component and during the descent of the detection housing, the multi-axis leveling mechanism adjusts the detection mounting frame to maintain its horizontal position.

[0022] The rotary drive mechanism outputs rotational speed through the drive joint to detect the viscosity of the surfactant in the measuring container.

[0023] Compared with the prior art, the present invention provides a rotational viscometer and a method for detecting the viscosity of surfactants, which has the following beneficial effects:

[0024] 1. This type of rotational viscometer, through the action of a multi-axis leveling mechanism, ensures the horizontal state of the detection mounting frame and the rotational drive mechanism during the position adjustment process. The rotational drive mechanism outputs a rotational speed through a drive connector, which rotates inside the protective frame to detect the viscosity of the surfactant in the measurement container. The leveling of the rotational drive mechanism effectively prevents the rotor from shifting during rotation, thereby ensuring the accuracy of the viscosity of the solution obtained by the rotational speed output by the rotor. The protective frame ensures that the rotor rotation process takes place inside the protective frame, limiting the detection space and enabling more effective acquisition of the solution viscosity.

[0025] 2. This type of rotational viscometer overcomes the damping effect of each damping ring by applying force through the lifting knob, thereby driving each drive gear to rotate via the drive shaft. Simultaneously, it overcomes the damping effect of the track between the main and auxiliary mounting columns, as well as the meshing effect of the drive gears with the limit gear plates. This allows relative sliding between the auxiliary and main mounting columns, adjusting the height of the detection housing mounted on the side of the auxiliary mounting column furthest from the main mounting column. Furthermore, when the lifting knob is stopped, the damping effect of each damping ring and the track ensures that the detection housing maintains its height during the operation of the rotational drive mechanism, thus guaranteeing the detection effect of the rotational drive mechanism.

[0026] 3. This type of rotational viscometer, under the influence of gravity, through the setting of the rotating joint, enables the drive connection and its connected rotor to be in a vertical state after a certain period of time. The multi-axis leveling mechanism keeps the detection mounting frame horizontal, thereby enabling the torque and speed output by the detection motor to be output along the same axis to the drive connection and its connected rotor, ensuring the accuracy of viscosity measurement. The length of the protective bracket used is not less than the length of the rotor used. Through the restriction of the protective bracket, the rotation process of the rotor is ensured to take place inside the protective frame composed of various protective brackets, thereby limiting a small detection space and enabling more effective acquisition of the viscosity of the solution. Attached Figure Description

[0027] Figure 1 This is one of the three-dimensional structural schematic diagrams of a rotational viscometer according to the present invention;

[0028] Figure 2 This is a second three-dimensional structural schematic diagram of a rotational viscometer according to the present invention;

[0029] Figure 3 This is the third three-dimensional structural schematic diagram of a rotational viscometer according to the present invention;

[0030] Figure 4 This is a three-dimensional structural diagram of a horizontal adjustment base for a rotational viscometer according to the present invention;

[0031] Figure 5 This is a cross-sectional view of the leveling component position of the horizontal adjustment base of a rotational viscometer according to the present invention.

[0032] Figure 6 This is a schematic diagram of the installation structure of the connecting column and the detection housing of a rotational viscometer according to the present invention;

[0033] Figure 7 This is a three-dimensional structural diagram of the connecting column of a rotational viscometer according to the present invention;

[0034] Figure 8 This is a three-dimensional structural diagram of the multi-axis leveling mechanism, detection and mounting frame, rotation drive mechanism, and protective frame of a rotational viscometer according to the present invention.

[0035] Figure 9 This is one of the three-dimensional structural schematic diagrams of a multi-axis leveling mechanism for a rotational viscometer according to the present invention;

[0036] Figure 10 This is a second three-dimensional structural schematic diagram of a multi-axis leveling mechanism for a rotational viscometer according to the present invention;

[0037] Figure 11 This is a three-dimensional structural diagram of the detection and mounting frame, rotation drive mechanism, and protective frame of a rotational viscometer according to the present invention.

[0038] In the diagram: 1. Horizontal adjustment base; 11. Support base; 111. Support blind hole; 112. Support spring; 113. Connecting leg; 114. Limiting guide post; 12. Leveling base; 13. Leveling assembly; 131. Universal joint; 132. Leveling sleeve rod; 133. Leveling inner rod; 134. Adjusting collar; 2. Connecting column; 21. Main mounting column; 211. Limiting toothed plate; 22. Secondary mounting column; 221. Drive shaft; 222. Drive gear; 223. Damping ring; 224. Lifting knob; 3. Detection housing; 4. Multi-axis leveling mechanism; 41. Connecting outer frame; 42. Adjusting inner frame; 43. Mounting support arm; 44. Primary adjustment unit; 441. Angle servo motor; 442. Adjusting gear; 443. Driven gear; 45. Secondary adjustment unit; 5. Detection mounting frame; 51. Connecting top plate; 52. Extension frame; 53. Mounting base plate; 6. Rotary drive mechanism; 61. Drive joint; 62. Rotor; 63. Detection motor; 64. Rotary joint; 7. Protective frame; 71. Protective bracket. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] As described in the background section, there are shortcomings in the existing technology. In order to solve the above-mentioned technical problems, this application proposes a rotational viscometer and a method for detecting the viscosity of surfactants.

[0041] Example 1:

[0042] Please see Figures 1-11A rotational viscometer includes a horizontal adjustment base 1, a connecting column 2, and a detection housing 3. The horizontal adjustment base 1 includes a support base 11 and a leveling base 12, which are connected by a plurality of leveling components 13. The support base 11 can provide a support plane at any position, and each leveling component 13 can drive the leveling base 12 to move relative to the support base 11 and drive the leveling base 12 to a horizontal state. The connecting column 2 is fixed at both ends to the leveling base 12 and the detection housing 3, respectively. The detection housing 3 is equipped with a multi-axis adjustment mechanism. The multi-axis leveling mechanism 4 and the detection mounting frame 5 are used to keep the level. The detection mounting frame 5 can be kept horizontal under the action of the multi-axis leveling mechanism 4. A rotary drive mechanism 6 is installed inside the detection mounting frame 5. The drive joint 61 of the rotary drive mechanism 6 passes through the bottom end of the detection housing 3. A protective frame 7 is also provided at the bottom end of the detection mounting frame 5. The protective frame 7 passes through the bottom end of the detection housing 3 and covers the outside of the drive joint 61. The drive joint 61 can be connected and fixed to each rotor 62 of different specifications. The selected rotor 62 rotates inside the protective frame 7 under the drive of the drive joint 61.

[0043] In use, the rotational viscometer can be placed at any testing position (which may be uneven) via the support base 11. The support base 11 provides a supporting plane. Then, by adjusting the various leveling components 13, the leveling base 12 is driven to move relative to the support base 11, adjusting the leveling base 12 to a horizontal state. During the adjustment of the leveling base 12, the multi-axis leveling mechanism 4 adjusts the testing mounting frame 5 to maintain its horizontal position. Then, after moving the testing housing 3 to the top of the connecting column 2, the solution whose viscosity needs to be tested can be placed in the testing container (different testing containers can be selected according to the amount of solution; commonly used reagent tubes, beakers, etc., or special testing containers such as small-capacity containers can be used. The testing container is a common technical solution in the prior art and will not be described in detail here). The viscosity range is determined according to the type of surfactant to be tested, and a suitable rotor 62 is selected and fixed between the rotor 62 and the drive connector 61. The body 3 slowly moves down along the connecting column 2, extending the rotor 62 and the protective frame 7 into the measuring container. During the movement of the detection housing 3, the multi-axis leveling mechanism 4 adjusts the detection mounting frame 5 to keep it level. Then, the rotation drive mechanism 6 outputs a rotational speed through the drive connector 61, which rotates inside the protective frame 7 to detect the viscosity of the surfactant in the measuring container. The multi-axis leveling mechanism 4 ensures the horizontal state of the detection mounting frame 5 and the rotation drive mechanism 6 during the position adjustment process, thus effectively preventing the rotor 62 from shifting during rotation. This ensures the accuracy of the viscosity of the solution obtained by the rotational speed output by the rotor 62 (detecting the viscosity of the solution by rotating the rotor 62 is a common technical solution in the prior art, which will not be elaborated here). Furthermore, the protective frame 7 ensures that the rotation of the rotor 62 takes place inside the protective frame 7, limiting the detection space and enabling more effective acquisition of the solution viscosity.

[0044] Example 2:

[0045] Please see Figures 1-11 The difference from the above embodiment is that the bottom end of the support base 11 is provided with a plurality of support blind holes 111, and a plurality of support springs 112 are provided inside each support blind hole 111. One end of the support spring 112 is fixed to the bottom of the support blind hole 111, and the other end of the support spring 112 is fixedly provided with a connecting leg 113. A limiting guide post 114 is provided at the end of the connecting leg 113 near the support spring 112, and the limiting guide post 114 extends into the support blind hole 111.

[0046] Each leveling assembly 13 includes a universal joint 131, a leveling sleeve rod 132, and a leveling inner rod 133. The top end of the leveling inner rod 133 extends into the bottom end of the corresponding leveling sleeve rod 132. The leveling inner rod 133 and the leveling sleeve rod 132 are threaded together. An adjusting collar 134 is provided on the outer side of the leveling inner rod 133. The bottom end of the leveling inner rod 133 is rotatably connected to the top end of the support base 11 through a bearing. The top end of the leveling sleeve rod 132 is connected to the leveling base 12 through the universal joint 131. Several leveling bubbles are provided on the top end of the leveling base 12.

[0047] In practical use, because the support spring 112 can deflect within a certain angle range, it allows the axis of the connecting leg 113 to have a certain angle with the axis of the support blind hole 111. This allows each connecting leg 113 to adapt to different heights (inclinations) at its current position. The limiting guide post 114 extends into the support blind hole 111, and the elastic limit of the support spring 112 restricts the movement range of the connecting leg 113, preventing large-scale offsets and "twisting." After the support plane is determined by each connecting leg 113, leveling is then applied. The component 13 is configured such that rotating the adjusting collar 134 can drive the leveling inner rod 133 to extend and retract within the leveling sleeve 132, allowing independent adjustment of the distance between the support base 11 and the leveling base 12 at each leveling component 13 position. The universal joints 131 adapt to the angle between the support base 11 and the leveling base 12, enabling the leveling base 12 to be adjusted to a horizontal position (the horizontal state of the leveling base 12 can be observed through several spirit levels at the top of the leveling base 12), ensuring horizontal support for the testing container and effectively supporting the connecting column 2, thus guaranteeing the accuracy of the testing.

[0048] Example 3:

[0049] Please see Figures 1-11 The difference from the above embodiment is that the connecting column 2 includes a main mounting column 21 and a secondary mounting column 22, which are slidably connected by a track; a limiting toothed plate 211 is provided on the side of the main mounting column 21 near the secondary mounting column 22, and a drive shaft 221 is rotatably provided on the side of the secondary mounting column 22 near the main mounting column 21; a plurality of drive gears 222 are coaxially fixed on the drive shaft 221, and each drive gear 222 meshes with the limiting toothed plate 211.

[0050] The drive shaft 221 is rotatably connected to the auxiliary mounting post 22 via several damping rings 223. A lifting knob 224 is provided at one end of the drive shaft 221 that extends through the auxiliary mounting post 22. By applying force through the lifting knob 224 to overcome the damping effect of each damping ring 223, the drive shaft 221 can be driven to rotate, thereby driving each drive gear 222 to rotate. It also overcomes the damping effect of the track set between the main mounting post 21 and the auxiliary mounting post 22, thereby driving the auxiliary mounting post 22 to slide relative to the main mounting post 21.

[0051] In practical use, the lifting knob 224 can be used to apply force to overcome the damping effect of each damping ring 223, thereby driving each drive gear 222 to rotate through the drive shaft 221. At the same time, it can overcome the damping effect of the track between the main mounting post 21 and the auxiliary mounting post 22, as well as the meshing effect of the drive gear 222 with the limit tooth plate 211. This can drive the auxiliary mounting post 22 to slide relative to the main mounting post 21, thereby adjusting the height of the detection housing 3 installed on the side of the auxiliary mounting post 22 away from the main mounting post 21. When the lifting knob 224 is stopped, the damping effect of each damping ring 223 and the track can ensure that the detection housing 3 can maintain its height during the operation of the rotary drive mechanism 6, thus ensuring the detection effect of the rotary drive mechanism 6.

[0052] Example 4:

[0053] Please see Figures 1-11 The difference from the above embodiment is that the multi-axis leveling mechanism 4 includes a connecting outer frame 41, an adjusting inner frame 42, and two mounting arms 43; the outer connecting frame 41 is fixed to the inner wall of the detection housing 3, and the inner connecting frame 41 is connected to the adjusting inner frame 42 through a primary adjusting unit 44, which can drive and adjust the included angle between the adjusting inner frame 42 and the connecting outer frame 41; the two mounting arms 43 are respectively fixed to the inner side of the adjusting inner frame 42, and the detection mounting frame 5 is rotatably connected between the two mounting arms 43; a secondary adjusting unit 45 is provided on the outer side of one mounting arm 43, which can drive and adjust the included angle between the detection mounting frame 5 and the mounting arm 43.

[0054] The primary adjustment unit 44 has the same structure as the secondary adjustment unit 45. The primary adjustment unit 44 includes an angle servo motor 441, an adjustment gear 442, and a driven gear 443. The output shaft of the angle servo motor 441 is coaxially fixed with the adjustment gear 442, and the adjustment gear 442 and the driven gear 443 are meshed. The relative positions of the angle servo motor 441 and the adjustment gear 442 with the connecting outer frame 41 remain constant. The driven gear 443 is fixed with the adjustment inner frame 42 and their rotation axes are coaxial.

[0055] In use, the angle servo motor 441 outputs a rotational speed to the adjusting gear 442. Through the gear meshing between the adjusting gear 442 and the driven gear 443, the driven gear 443 is driven to rotate the adjusting inner frame 42, thereby adjusting the angle between the adjusting inner frame 42 and the connecting outer frame 41. Since the secondary adjustment unit 45 has the same structure, the angle between the detection mounting frame 5 and the mounting arm 43 is adjusted by the secondary adjustment unit 45. Specifically, a gyroscope is provided on the detection mounting frame 5, which can measure the spatial angle between the detection mounting frame 5 and the horizontal plane. The gyroscope can then output drive signals to the primary adjustment unit 44 and the secondary adjustment unit 45 respectively to adjust and maintain the level of the detection mounting frame 5.

[0056] Example 5:

[0057] Please see Figures 1-11 The difference from the above embodiment is that the detection mounting frame 5 includes a connecting top plate 51, an extension frame 52, and a mounting base plate 53, and the connecting top plate 51 and the mounting base plate 53 are connected and fixed through the extension frame 52; the rotary drive mechanism 6 also includes a detection motor 63, which is fixed to the mounting base plate 53, and the output end of the detection motor 63 passes through the mounting base plate 53 and is connected and fixed to the drive connector 61 through a rotary joint 64; a monitor is provided inside the detection motor 63, which can monitor the output torque and output speed of the detection motor 63.

[0058] The protective frame 7 includes several protective brackets 71, the top of each protective bracket 71 being fixed to the mounting base plate 53; the protective brackets 71 can be replaced according to the specifications of the rotor 62, and the length of the protective bracket 71 used is not less than the length of the rotor 62 used.

[0059] In use, the mounting base plate 53 extends from the bottom of the detection housing 3, and the output shaft of the detection motor 63 is connected to the mounting base plate 53 via a bearing. Under the action of gravity, through the setting of the rotary joint 64, the drive joint 61 and its connected rotor 62 can be in a vertical state after a certain period of time. The multi-axis leveling mechanism 4 keeps the detection mounting frame 5 horizontal, thereby enabling the torque and speed output by the detection motor 63 to be output along the same axis to the drive joint 61 and its connected rotor 62, ensuring the accuracy of viscosity measurement. Furthermore, the monitoring device set inside the detection motor 63 can monitor the detection motor. The output torque and output speed of the detection motor 63 are detected, and the viscosity of the solution can be calculated based on the output torque and output speed of the detection motor 63 under stable conditions (the specific calculation algorithm is a common technical solution in the prior art, which will not be described in detail here). In specific use, the protective bracket 71 can be replaced according to the specifications of the rotor 62. The length of the protective bracket 71 used is not less than the length of the rotor 62 used. By restricting the rotation of the rotor 62, it is ensured that the rotation process of the rotor 62 is carried out inside the protective frame 7 composed of each protective bracket 71, so as to restrict a smaller detection space and obtain the viscosity of the solution more effectively.

[0060] Example 6:

[0061] A method for detecting the viscosity of a surfactant, using a rotational viscometer as described in any one of Examples 1-5, includes the following steps:

[0062] Place the rotational viscometer at any testing position, and provide a support plane at the testing position through the support base 11. Adjust each leveling component 13 to drive the leveling base 12 to a horizontal state.

[0063] Adjust the detection housing 3 to the top of the connecting column 2, determine the viscosity range according to the type of surfactant to be tested, select a rotor 62 of suitable specifications, and fix the rotor 62 and the drive connector 61.

[0064] Place the surfactant to be tested into the measuring container and place the measuring container on the leveling base 12;

[0065] Slowly move the detection housing 3 down along the connecting column 2 and insert the rotor 62 into the measuring container;

[0066] During the process of adjusting the leveling base 12 by each leveling component 13 and during the process of lowering the detection housing 3, the multi-axis leveling mechanism 4 adjusts the detection mounting frame 5 to keep the detection mounting frame 5 horizontal.

[0067] The rotary drive mechanism 6 outputs rotational speed through the drive joint 61 to detect the viscosity of the surfactant in the measuring container.

[0068] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotational viscometer, comprising a horizontal adjustment base, a connecting column, and a detection housing, characterized in that: The horizontal adjustment base includes a support base and a leveling base, and the support base and the leveling base are connected by a plurality of leveling components; The support base can provide a support plane at any position, and each of the leveling components can drive the leveling base to move relative to the support base and drive the leveling base to be in a horizontal state. The two ends of the connecting column are respectively fixed to the leveling base and the detection housing. The detection housing is provided with a multi-axis leveling mechanism and a detection mounting frame. The detection mounting frame can be kept horizontal under the action of the multi-axis leveling mechanism. A rotary drive mechanism is installed inside the detection mounting frame, and the drive joint of the rotary drive mechanism extends through the bottom end of the detection housing. The bottom of the detection mounting frame is also provided with a protective frame, which extends through the bottom of the detection housing and covers the outside of the drive connector. The drive connector can be connected and fixed to various rotors of different specifications, and the selected rotor rotates inside the protective frame under the drive of the drive connector. The multi-axis leveling mechanism includes a connecting outer frame, an adjusting inner frame, and two mounting arms. The outer connecting frame is fixed to the inner wall of the detection housing, and the inner connecting frame is connected to the inner adjusting frame through a primary adjusting unit. The primary adjusting unit can drive and adjust the included angle between the inner adjusting frame and the outer connecting frame. The two mounting arms are respectively fixed to the inner side of the adjusting inner frame, and the detection mounting frame is rotatably connected between the two mounting arms; A secondary adjustment unit is provided on the outer side of one of the mounting arms, and the secondary adjustment unit is capable of driving and adjusting the angle between the detection mounting frame and the mounting arm; The detection mounting frame includes a connecting top plate, an extension frame, and a mounting base plate, wherein the connecting top plate and the mounting base plate are connected and fixed together by the extension frame; The rotary drive mechanism also includes a detection motor, which is fixed to the mounting base plate. The output end of the detection motor passes through the mounting base plate and is connected and fixed to the drive connector via a rotary joint. The detection motor is equipped with a monitor that can detect the output torque and output speed of the detection motor.

2. A rotational viscometer according to claim 1, characterized in that: The bottom of the support base has several blind holes, and several support springs are installed inside each blind hole. One end of each support spring is fixed to the bottom of the blind hole, and the other end of each support spring is fixed with a connecting leg. A limit guide post is provided at the end of the connecting leg near the support spring, and the limit guide post extends into the blind hole.

3. A rotational viscometer according to claim 1, characterized in that: Each of the leveling components includes a universal joint, a leveling sleeve rod, and a leveling inner rod, the top end of which extends into the bottom end of the corresponding leveling sleeve rod, and the leveling inner rod and the leveling sleeve rod are threaded together. An adjusting collar is provided on the outer side of the leveling inner rod, and the bottom end of the leveling inner rod is rotatably connected to the top end of the support base through a bearing. The top end of the leveling sleeve is connected to the leveling base via the universal joint, and the top end of the leveling base is provided with several spirit levels.

4. A rotational viscometer according to claim 1, characterized in that: The connecting column includes a main mounting column and a secondary mounting column, which are slidably connected by a track. A limiting toothed plate is provided on the side of the main mounting post near the auxiliary mounting post, and a drive shaft is rotatably provided on the side of the auxiliary mounting post near the main mounting post. The drive shaft is coaxially fixed with several drive gears, and each drive gear meshes with the limiting gear plate.

5. A rotational viscometer according to claim 4, characterized in that: The drive shaft is rotatably connected to the sub-mounting post through several damping rings, and a lifting knob is provided at one end of the drive shaft that passes through the sub-mounting post. By applying force through the lifting knob to overcome the damping effect of each of the damping rings, the drive shaft can be driven to rotate, thereby overcoming the damping effect of the track set between the main mounting post and the auxiliary mounting post, and driving the auxiliary mounting post to slide relative to the main mounting post.

6. A rotational viscometer according to claim 1, characterized in that: The primary adjustment unit has the same structure as the secondary adjustment unit. The primary adjustment unit includes an angle servo motor, an adjustment gear, and a driven gear. The output shaft of the angle servo motor is fixed coaxially with the adjusting gear, and the adjusting gear and the driven gear are engaged. The relative positions of the angle servo motor and the adjusting gear with the connecting outer frame remain constant, and the driven gear is fixed to the adjusting inner frame and the rotation axis is coaxial.

7. A rotational viscometer according to claim 1, characterized in that: The protective frame includes several protective brackets, and the top of each protective bracket is fixed to the mounting base plate; The protective bracket can be replaced according to the specifications of the rotor, and the length of the protective bracket used is not less than the length of the rotor used.

8. A method for detecting the viscosity of a surfactant, characterized in that, The method of detecting the viscosity of a surfactant using a rotational viscometer as described in any one of claims 1-7 includes the following steps: Place the rotational viscometer at any testing position, and use the support base to provide a support plane at the testing position. Adjust each leveling component to drive the leveling base to a horizontal state. Adjust the detection housing to the top of the connecting column, determine the viscosity range according to the type of surfactant to be tested, select a rotor of suitable specifications, and fix the rotor to the drive connector. Place the surfactant to be tested into the measuring container and place the measuring container on the leveling base; Slowly move the detection housing down along the connecting column and insert the rotor into the measuring container; During the process of adjusting the leveling base of each leveling component and during the descent of the detection housing, the multi-axis leveling mechanism adjusts the detection mounting frame to maintain its horizontal position. The rotary drive mechanism outputs rotational speed through the drive joint to detect the viscosity of the surfactant in the measuring container.

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