A viscosity measuring device integrated with a ph meter

Abstract

The utility model provides a kind of viscosity measuring device of integrated PH meter, it is related to detection technical field, including rack and the measuring mechanism of slidingly being arranged on rack, measuring mechanism includes: connecting frame, with rack sliding connection;Fixed part, fixedly installed in the connecting frame bottom, and fixed part bottom is equipped with electric connector;Detection component, including barrel rotor and PH meter, barrel rotor is sleeved in fixed part outside, PH meter is arranged in barrel rotor inside, its detection end is stretched from the barrel rotor bottom, and its top electrode is electrically connected with electric connector;Rotary drive mechanism, for driving barrel rotor relative to fixed part rotation;Torque detection unit, for detecting the rotation resistance of barrel rotor.The viscosity measuring device makes viscosity measurement and pH measurement can be completed in same sample once, avoids the cumbersome operation of needing to use viscosimeter and pH meter respectively in traditional method twice measurement, simplifies detection procedure, improves detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of materials testing technology, and in particular to a viscosity measuring device with an integrated pH meter. Background Technology

[0002] In the preparation of lithium-ion battery anode sheets, carboxymethyl cellulose (CMC) is widely used as an important thickener in the slurry system. Its main functions include promoting uniform dispersion of active materials, maintaining colloidal stability, improving coating film formation performance, preventing electrode cracking, and enhancing the adhesion of the slurry to the current collector. Therefore, the performance of CMC directly affects the process adaptability of the anode slurry and the quality of the electrode sheet.

[0003] In a laboratory setting, the viscosity and pH value of CMC aqueous solutions are critical quality control indicators. Viscosity reflects the thickening ability and rheological properties of CMC, while pH value affects the stability and electrochemical performance of the slurry. Currently, viscosity and pH values ​​are typically measured separately using a viscometer and a pH meter. This separate testing method presents significant efficiency issues in practical operation.

[0004] Because the two instruments operate independently, daily maintenance is quite demanding. For example, the pH meter electrodes require regular cleaning, soaking, and calibration, while the viscometer rotor also needs cleaning and calibration. Furthermore, the testing process is cumbersome; samples from the same batch must first have their viscosity or pH measured before being transferred to another instrument for another test. When the number of samples is large, the testing cycle is significantly extended, personnel operation time increases exponentially, and overall efficiency decreases. Utility Model Content

[0005] In view of this, the present invention proposes a viscosity measuring device integrating a pH meter, which solves the problems of low detection efficiency, cumbersome operation and high maintenance cost caused by the separate use of viscometer and pH meter in the prior art.

[0006] The technical solution of this utility model is implemented as follows: This utility model provides a viscosity measuring device with an integrated pH meter, including a frame and a measuring mechanism. The measuring mechanism is slidably mounted on the frame and can move up and down along it. The measuring mechanism includes: The connecting frame is slidably connected to the frame; A fixing component is fixedly installed at the bottom of the connecting frame, and an electrical connector is provided at the bottom of the fixing component; The detection assembly includes a cylindrical rotor and a pH meter. The cylindrical rotor is sleeved on the outside of the fixing member, and the pH meter is disposed inside the cylindrical rotor. Its detection end extends from the bottom of the cylindrical rotor, and its top electrode is electrically connected to the electrical connector. A rotary drive mechanism for driving a cylindrical rotor to rotate relative to a fixed component; The torque detection unit is used to detect the rotational resistance of the cylindrical rotor.

[0007] Based on the above technical solution, preferably, the top of the pH meter is provided with an external thread, and the bottom of the fixing member is provided with an internal thread hole that mates with the external thread; The electrical connector at the bottom of the fixing component is a fixed conductive contact, including an annular electrode and a central electrode located at the bottom of the internal threaded hole. The conductive electrode at the top of the pH meter is electrically connected to the annular electrode and the central electrode.

[0008] Based on the above technical solution, preferably, the detection component further includes a mounting cylinder, which is rotatably sleeved on the outside of the fixing member through a bearing assembly; the upper end of the cylindrical rotor is detachably connected to the lower end of the mounting cylinder, and the detachable connection between the upper end of the cylindrical rotor and the lower end of the mounting cylinder is a threaded connection, a snap-fit ​​connection, or a magnetic connection.

[0009] Based on the above technical solution, preferably, a threaded sleeve is fixedly provided on the upper inner wall of the mounting cylinder, and a threaded through hole is provided in the center of the sleeve. The upper end of the pH meter is provided with an external threaded section, which is connected to the threaded through hole. The electrical connector at the bottom of the fixing component is an electric slip ring, and its moving ring is electrically connected to the conductive electrode at the top of the pH meter.

[0010] Based on the above technical solution, preferably, the top of the threaded sleeve is provided with a limiting member. When the pH meter is screwed into the threaded sleeve to the working position, the limiting member abuts against the bottom of the fixing member to restrict the pH meter from continuing to move axially.

[0011] Based on the above technical solution, preferably, the rotary drive mechanism includes: The motor is fixedly installed at the bottom of the connecting frame and located on one side of the fixing member; The mounting plate is coaxially connected to the output shaft of the motor. A first magnetic ring is disposed in the mounting plate, and the first magnetic ring comprises a plurality of first magnets with alternating polarities evenly distributed in the circumferential direction; The second magnetic ring is disposed in the mounting cylinder, and the second magnetic ring contains a plurality of second magnets with alternating polarities evenly distributed in the circumferential direction; The first magnetic ring and the second magnetic ring transmit torque through magnetic coupling, driving the mounting cylinder and the cylindrical rotor to rotate.

[0012] Based on the above technical solution, preferably, the mounting plate has a plurality of first magnetic rings arranged along the axial direction, and the N and S poles of each first magnetic ring are aligned axially; the mounting cylinder has the same number of second magnetic rings as the first magnets, and the N and S poles of each second magnetic ring are aligned axially; wherein, the magnetic pole axial direction of each layer of first magnetic rings corresponds one-to-one with that of the corresponding layer of second magnetic rings.

[0013] Based on the above technical solution, preferably, the torque detection unit is a strain sensor, which is set at the connection between the mounting plate and the motor shaft, and is used to detect the output torque of the motor.

[0014] Based on the above technical solution, preferably, the torque detection unit is a Hall sensor, fixed to the outside of the fixing member, and used to calculate the rotational resistance torque based on the phase difference of the magnetic field.

[0015] Based on the above technical solution, preferably, it also includes a processor, which is fixedly mounted above the connecting frame for electrical connection with the electrical connector and the torque detection unit.

[0016] The present invention has the following advantages over the prior art: (1) By coaxially mounting the pH meter inside the cylindrical rotor, with the pH meter's detection end extending from the bottom of the rotor and the top electrode connected to the electrical connector at the bottom of the fixture, and the cylindrical rotor fitted onto the outside of the fixture and driven to rotate by a rotary drive mechanism, and the rotor resistance detected by the torque detection unit, simultaneous measurement of viscosity and pH value is achieved. This structure allows viscosity and pH measurements to be completed simultaneously in the same sample, avoiding the cumbersome operation of using a viscometer and pH meter separately in traditional methods, simplifying the detection process and improving detection efficiency.

[0017] (2) The threaded connection and fixed conductive contact structure enable quick assembly and disassembly of the pH meter and stable electrical signal transmission. This solution improves the ease of maintenance of the device while ensuring the accuracy of measurement data, making it suitable for testing scenarios that require frequent replacement or calibration of the pH meter.

[0018] (3) The upper end of the cylindrical rotor is detachably connected to the lower end of the mounting cylinder, which enables the rapid disassembly, assembly, cleaning and maintenance of the cylindrical rotor.

[0019] (4) By defining the threaded fixing method of the pH meter and the rotor and the signal transmission structure of the slip ring, a modular assembly system is formed. And through the quick connection of the pre-assembled "pH meter-rotor" assembly and the mounting cylinder, efficient disassembly and cleaning of the detection components are achieved.

[0020] (5) By setting an axially aligned multi-layer magnetic ring structure in the mounting plate and mounting cylinder, the magnetic poles of the first magnetic ring in each layer are strictly aligned with the corresponding second magnetic ring, thereby enhancing the torque and improving the smoothness of operation of the magnetic coupling transmission. This design improves the torque transmission capability through the magnetic field superposition effect, and at the same time, it uses a symmetrical layout to achieve axial force balance, which significantly improves the measurement stability and service life of the device. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the planar structure of the viscosity measuring device of the integrated pH meter disclosed in this utility model; Figure 2 This is a schematic diagram of an assembly structure of the pH meter disclosed in this utility model in a measuring mechanism; Figure 3 for Figure 2 Enlarged view of a portion of point A in the middle; Figure 4 This is a schematic diagram of another assembly structure of the pH meter disclosed in this utility model in the measuring mechanism; Figure 5 This is a top view of the rotary drive mechanism disclosed in this utility model; Figure 6 This is a planar sectional view of the rotary drive mechanism disclosed in this utility model; Figure label: P. Water bath; 1. Frame; 11. Stand; 12. Support base; 2. Measuring mechanism; 21. Connecting frame; 22. Fixing component; 221. Internal threaded hole; 23. Electrical connector; 24. Detection assembly; 241. Cylindrical rotor; 242. pH meter; 2421. Conductive electrode; 25. Rotary drive mechanism; 26. Torque detection unit; 221. Internal threaded hole; 231a. Ring electrode; 232a. Center electrode; 243. Mounting cylinder; 244. Bearing assembly; 2411. Threaded sleeve; 231b. Stator ring; 232b. Moving ring; 2412. Limiting component; 251. Motor; 252. Mounting plate; 253. First magnetic ring; 2531. First magnet; 254. Second magnetic ring; 2541. Second magnet; 3. Processor. Detailed Implementation

[0023] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0024] like Figure 1 As shown, combined with Figure 2-4This utility model discloses a viscosity measuring device with an integrated pH meter, including a frame 1 and a measuring mechanism 2.

[0025] The frame 1 serves as the supporting structure for the entire device, providing vertical guidance and positioning reference for the measuring mechanism 2. In this embodiment, the measuring mechanism 2 is slidably mounted on the frame 1, and the lifting and lowering movement of the measuring mechanism 2 is realized through the sliding connection, ensuring that the cylindrical rotor 241 and pH meter 242 in the measuring mechanism 2 can be immersed in the liquid to be measured.

[0026] In this embodiment, a locking nut can be provided at the connection between the frame 1 and the measuring mechanism 2. When the measuring mechanism 2 slides to a certain position along the vertical direction of the frame 1, the position of the measuring mechanism 2 can be locked by tightening the locking nut.

[0027] The frame 1 in this embodiment includes a stand 11 and a support base 12. The stand 11 is vertically fixed on the support base 12. The measuring mechanism 2 is slidably connected to the stand 11. The support base 12 is used for a water bath P, which is used to hold the solution to be tested.

[0028] The measuring mechanism 2 in this embodiment includes a connecting frame 21, a fixing member 22, a detection component 24, a rotary drive mechanism 25, and a torque detection unit 26.

[0029] The connecting frame 21 is slidably connected to the frame, which drives the fixing part 22, the detection component 24 and other components to move up and down as a whole, so as to realize the vertical positioning of the measuring mechanism 2 and facilitate the immersion and removal of the detection component 24.

[0030] The fixing component 22 is fixedly installed at the bottom of the connecting frame 21 as a static support component of the detection assembly 24. The bottom of the fixing component 22 is provided with an electrical connector 23 to provide a stable electrical signal transmission path for the pH meter 242, while ensuring that the fixed part is not disturbed when the cylindrical rotor 241 rotates.

[0031] The detection assembly 24 includes a cylindrical rotor 241 and a pH meter 242. The cylindrical rotor 241 is sleeved on the outside of the fixing member 22 and is driven to rotate by the rotation drive mechanism 25, generating shear force in contact with the liquid. The pH meter 242 is coaxially built into the rotor, with the detection end extending out of the bottom of the rotor to directly contact the liquid. The conductive electrode 2421 at the top transmits signals through the electrical connector 23.

[0032] The cylindrical rotor 241 and pH meter 242 are coaxially integrated, which can realize the synchronous measurement of viscosity and pH value, avoiding errors and time waste caused by sample transfer; in addition, the pH meter 242 is built into the cylindrical rotor 241, which can save external space and reduce the size of the instrument.

[0033] The rotary drive mechanism 25 is used to drive the cylindrical rotor 241 to rotate relative to the fixed member 22, generating shear force to measure the liquid viscosity. The torque detection unit 26 is used to detect the rotational resistance of the cylindrical rotor 241 and convert it into viscosity data.

[0034] By coaxially mounting the pH meter 242 inside the cylindrical rotor 241, with the detection end of the pH meter 242 extending from the bottom of the rotor and the top electrode connected to the electrical connector 23 at the bottom of the fixing component 22, and the cylindrical rotor 241 fitted onto the outside of the fixing component 22 and driven to rotate by the rotary drive mechanism 25, and cooperating with the torque detection unit 26 to detect the rotor resistance, simultaneous measurement of viscosity and pH value is achieved. This structure allows viscosity and pH measurements to be completed in one step with the same sample, avoiding the cumbersome operation of using a viscometer and pH meter separately in traditional methods, simplifying the detection process and improving detection efficiency.

[0035] Since the pH meter 242 needs to be cleaned after measurement, it needs to be easy to disassemble and assemble. Therefore, the following technical solution is adopted in this embodiment.

[0036] As one implementation method, refer to the appendix. Figure 3 As shown, the pH meter 242 has an external thread at its top, and the fixing member 22 has an internal threaded hole 221 at its bottom that mates with the external thread, thereby enabling a detachable connection between the pH meter 242 and the fixing member 22. The electrical connector 23 at the bottom of the fixing member 22 is a fixed conductive contact, including an annular electrode 231a and a central electrode 232a located at the bottom of the internal threaded hole 221. The conductive electrode 2421 at the top of the pH meter 242 is electrically connected to the annular electrode 231a and the central electrode 232a. The annular electrode 231a and the central electrode 232a ensure stable signal transmission from the pH meter 242 to the external processor 3. When the pH meter 242 is screwed in or out, the conductive electrode 2421 automatically contacts or disconnects, without requiring additional insertion or removal operations.

[0037] The pH meter 242 achieves quick assembly / disassembly and stable electrical signal transmission through a threaded connection and fixed conductive contact structure. This design improves the ease of maintenance while ensuring the accuracy of measurement data, making it suitable for testing scenarios requiring frequent replacement or calibration of the pH meter 242.

[0038] Since the cylindrical rotor 241 also needs to be cleaned after viscosity testing, it needs to be easy to disassemble and assemble. Therefore, the following technical solution is adopted in this embodiment.

[0039] The detection assembly 24 also includes a mounting sleeve 243, which is rotatably fitted onto the outside of the fixing member 22 via a bearing assembly 244, forming a rotational support structure to ensure stable rotation of the cylindrical rotor 241 and reduce frictional losses. In an embodiment, the bearing assembly 244 (such as a deep groove ball bearing) provides axial and radial positioning, improving measurement accuracy.

[0040] The upper end of the cylindrical rotor 241 is detachably connected to the lower end of the mounting cylinder 243, enabling quick disassembly, assembly, cleaning, and maintenance of the cylindrical rotor 241.

[0041] In this embodiment, the detachable connection between the upper end of the cylindrical rotor 241 and the lower end of the mounting cylinder 243 is a threaded connection, a snap-fit ​​connection, or a magnetic connection. The preferred method in this embodiment is a threaded connection, which ensures structural stability after connection and facilitates easy assembly and disassembly.

[0042] In some other implementations, since the lower end of pH meter 242 is immersed in the solution, after the test is completed, pH meter 242 is covered with solution, and it is inconvenient to directly disassemble pH meter 242 when there is a corrosive solution.

[0043] Therefore, the pH meter 242 can be pre-installed inside the cylindrical rotor 241, and the two can then be installed together on the mounting cylinder 243. Since the upper end of the cylindrical rotor 241 and the mounting cylinder 243 are detachably connected and have a disassembly connection point, the cylindrical rotor 241 and the mounting cylinder 243 can be disassembled to achieve the overall disassembly of the cylindrical rotor 241 and the pH meter 242. This facilitates modular disassembly and assembly, and improves disassembly and assembly efficiency. At the same time, after disassembly, the entire assembly can be immersed in a cleaning solution for overall cleaning, which also improves cleaning efficiency.

[0044] For details, please refer to the appendix. Figure 4 As shown, a threaded sleeve 2411 is fixedly installed on the upper inner wall of the cylindrical rotor 241, with a threaded through hole at its center. The pH meter 242 has an external threaded section at its upper end, which mates with the threaded through hole to fix the pH meter 242 inside the rotor. The pH meter 242 can be pre-installed inside the cylindrical rotor 241 to form a modular assembly, facilitating one-time installation or disassembly.

[0045] The electrical connector 23 at the bottom of the fixing component 22 is an electrical slip ring, whose moving ring 232b is electrically connected to the conductive electrode 2421 at the top of the pH meter 242. Specifically, the conductive electrode 2421 at the top of the pH meter 242 is directly connected to the moving ring 232b. The moving ring 232b rotates with the pH meter 242 and maintains sliding contact with the stationary ring 231b, thereby achieving dynamic conductivity and solving the problem of continuous signal transmission of the pH meter 242 in the rotating state.

[0046] A modular assembly system is formed by defining the threaded fixing method between the pH meter 242 and the cylindrical rotor 241 and the electric slip ring signal transmission structure. Furthermore, the pre-assembled "pH meter-cylindrical rotor" assembly and the quick connection with the mounting cylinder 243 enable efficient disassembly, assembly, and cleaning of the detection component 24.

[0047] As one embodiment, the threaded sleeve 2411 is provided with a limiting member 2412 at the top. When the cylindrical rotor 241 is screwed into the mounting cylinder 243 to the working position, the limiting member 2412 abuts against the bottom of the fixing member 22 to restrict the pH meter 242 from continuing to move axially.

[0048] Specifically, during the assembly process of the cylindrical rotor 241 and the mounting cylinder 243 via a threaded connection, when the bottom of the limiting member 2412 and the fixing member 22 come into contact, the axial position of the cylindrical rotor 241 and the mounting cylinder 243 is limited. At the same time, the pH meter 242 is positioned and the contact pressure between the conductive electrode 2421 at the top of the pH meter 242 and the slip ring is kept stable to avoid overload and excessive pressure on the conductive electrode 2421 and the slip ring, which could damage the slip ring.

[0049] To achieve the rotation of the cylindrical rotor 241, this embodiment shows a rotary drive mechanism 25.

[0050] For details, please refer to the appendix. Figure 2 , 5 As shown in Figures 6 and 7, the rotary drive mechanism 25 includes a motor 251, a mounting plate 252, a first magnetic ring 253, and a second magnetic ring 254.

[0051] The motor 251 is fixedly mounted at the bottom of the connecting frame and located on one side of the fixing member 22, providing rotational power through the output shaft. The side-mounted layout avoids interference with the signal line of the pH meter 242, ensuring stable power output.

[0052] The mounting plate 252 is coaxially connected to the output shaft of the motor 251, carrying the first magnetic ring 253 and transmitting rotational power.

[0053] A first magnetic ring 253 is disposed in the mounting plate 252. The first magnetic ring 253 comprises a plurality of circumferentially uniformly distributed first magnets 2531. The first magnetic ring 253 is composed of circumferentially uniformly distributed first magnets 2531 (each magnet has an N pole and an S pole, and the plurality of magnets are arranged circumferentially with adjacent magnets having opposite magnetic pole orientations). The circumferentially uniformly distributed magnets generate a uniform rotating magnetic field, forming an active magnetic pole in the mounting plate 252. A second magnetic ring 254 is disposed in the mounting cylinder 243. The second magnetic ring 254 comprises a plurality of circumferentially uniformly distributed second magnets 2541 (each magnet has an N pole and an S pole, and the plurality of magnets are arranged circumferentially with adjacent magnets having opposite magnetic pole orientations). The second magnets 2541 serve as driven magnetic poles. The second magnetic ring 254 and the first magnetic ring 253 form a non-contact magnetic coupling, realizing zero-wear power transmission.

[0054] In this embodiment, there is a gap between the mounting plate 252 and the mounting cylinder 243, and the first magnetic ring 253 and the second magnetic ring 254 transmit torque through the interaction of the air gap magnetic field.

[0055] By employing a side-mounted motor 251 coupled with a dual magnetic ring design, non-contact drive of the cylindrical rotor 241 is achieved. Precise magnetic pole arrangement ensures stable torque output while avoiding wear and maintenance issues associated with mechanical transmission.

[0056] In some implementations, a plurality of first magnetic rings 253 are arranged axially in the mounting disk 252, and the plurality of first magnetic rings 253 are spaced apart axially to form a plurality of magnetic ring layers, such as double or triple layers. Each first magnetic ring 253 is composed of circumferentially uniformly distributed first magnets 2531 (each magnet has an N pole and an S pole, and the plurality of magnets are arranged circumferentially with adjacent magnets having opposite magnetic pole orientations).

[0057] The N and S poles of each first magnetic ring 253 are aligned axially. Specifically, all N and S poles within the same magnetic ring layer are completely coincident in axial projection. For example, the N pole of the upper first magnetic ring 253 is aligned vertically with the N pole of the lower second magnetic ring 254, and the S pole of the upper first magnetic ring 253 is aligned vertically with the S pole of the lower second magnetic ring 254. By superimposing magnetic fields through multiple magnetic rings, the torque transmission capability is significantly improved.

[0058] As an example: If a double-layered 16-pole magnetic ring is used, each layer contains 8 N poles and 8 S poles, with adjacent magnetic poles spaced 22.5° apart. The magnetic poles of the two layers of the first magnetic ring 253 are strictly aligned axially, forming a superimposed magnetic field, which causes the magnetic field strength to increase linearly.

[0059] The number of magnetic rings 254, the number of layers, and the arrangement of magnetic poles are exactly the same as those of the first magnetic ring 253, but the polarities of the magnetic poles are opposite (N to S, S to N).

[0060] The N pole of the first magnetic ring 253 attracts the S pole of the second magnetic ring 254 and repels its N pole. Through the magnetic force, the rotational motion of the mounting plate 252 is transmitted to the mounting cylinder 243, which drives the cylindrical rotor 241 to rotate relative to the fixed member 22.

[0061] In this embodiment, the magnetic poles of the first magnetic ring 253 and the corresponding second magnetic ring 254 of each layer are axially aligned. Specifically, along the rotation axis (i.e., the up-down direction), the magnetic poles of the active side (first magnetic ring 253) and the driven side (second magnetic ring 254) are strictly aligned. If it is a double-layer structure, the first magnetic ring 253 of the upper layer of the mounting plate 252 is aligned with the upper second magnetic ring 254 of the mounting cylinder 243, and the first magnetic ring 253 of the lower layer of the mounting plate 252 is aligned with the lower second magnetic ring 254 of the mounting cylinder 243. The aligned magnetic poles minimize the magnetic field path, reduce magnetic leakage, avoid torque pulsation caused by magnetic pole misalignment, and the symmetrical magnetic field distribution counteracts the axial magnetic attraction force.

[0062] By incorporating an axially aligned multi-layered magnetic ring structure within the mounting plate 252 and mounting cylinder 243, the magnetic poles of the first magnetic ring 253 in each layer are precisely aligned with the corresponding second magnetic ring 254, thereby enhancing the torque and improving the operational stability of the magnetic coupling transmission. This design improves torque transmission capability through the magnetic field superposition effect, while utilizing a symmetrical layout to achieve axial force balance, significantly improving the measurement stability and service life of the device.

[0063] In some implementations, the torque detection unit 26 is a strain sensor, which is disposed at the connection between the mounting plate 252 and the motor 251 shaft, and is used to detect the output torque of the motor 251. When the motor 251 drives the mounting plate 252 to rotate, the torque causes a slight deformation (approximately 0.01-0.05 mm) at the connection between the mounting plate 252 and the motor 251 shaft. The strain sensor measures this deformation and converts it into a change in resistance, thereby outputting a torque signal.

[0064] In some other embodiments, the torque detection unit 26 is a Hall sensor, fixed to the outside of the fixing member 22, and is used to calculate the rotational resistance torque based on the phase difference of the magnetic field. When the cylindrical rotor 241 is decelerated by the liquid resistance, the second magnetic ring 254 generates a phase difference Δθ relative to the first magnetic ring 253, and the Hall sensor array converts the detected Δθ into a torque value (T=k•Δθ, where k is a calibration coefficient).

[0065] In this embodiment, viscosity is calculated by measuring the resistance torque experienced by the rotor when rotating in the liquid. Based on Stokes' law, the torque-viscosity relationship is T=k•η•ω (where T is the torque, k is the instrument constant, η is the viscosity, and ω is the angular velocity). The torque detection unit 26 (such as a strain sensor or Hall sensor) measures the torque T generated by the shear force on the rotor in real time. Combined with the preset instrument constant k and the real-time rotation speed ω, the processor 3 automatically calculates and outputs the viscosity value according to the formula η=T / (k•ω).

[0066] As one implementation, the measuring mechanism 2 also includes a processor 3, which is fixedly mounted above the connecting frame 21 for electrical connection with the electrical connector 23 and the torque detection unit 26.

[0067] In this embodiment, the processor 3 directly receives the electrode signal of the pH meter 242 and the torque detection data, and calculates the viscosity and pH value synchronously through the built-in algorithm. This avoids the data transmission delay between traditional separate instruments, improves detection efficiency, simplifies the equipment wiring structure, and makes the overall device more compact and easier to maintain.

[0068] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A viscosity measuring device integrating a pH meter, characterized in that, Includes a frame (1) and a measuring mechanism (2), wherein the measuring mechanism (2) is slidably mounted on the frame (1) and can move up and down along it, and the measuring mechanism (2) includes: The connecting frame (21) is slidably connected to the frame (1); A fastener (22) is fixedly installed at the bottom of the connecting frame (21), and an electrical connector (23) is provided at the bottom of the fastener (22); The detection component (24) includes a cylindrical rotor (241) and a pH meter (242). The cylindrical rotor (241) is sleeved on the outside of the fixing member (22), and the pH meter (242) is disposed inside the cylindrical rotor (241). Its detection end extends from the bottom of the cylindrical rotor (241), and its top conductive electrode (2421) is electrically connected to the electrical connector (23). A rotary drive mechanism (25) is used to drive the cylindrical rotor (241) to rotate relative to the fixed member (22); A torque detection unit (26) is used to detect the rotational resistance of the cylindrical rotor (241).

2. The viscosity measuring device with integrated pH meter as described in claim 1, characterized in that: The pH meter (242) has an external thread at the top, and the fixing member (22) has an internal thread hole (221) at the bottom that mates with the external thread. The electrical connector (23) at the bottom of the fixing member (22) is a fixed conductive contact, including an annular electrode (231a) and a central electrode (232a) located at the bottom of the internal threaded hole (221). The conductive electrode (2421) at the top of the pH meter (242) is electrically connected to the annular electrode (231a) and the central electrode (232a).

3. The viscosity measuring device with integrated pH meter as described in claim 1, characterized in that: The detection component (24) also includes a mounting cylinder (243), which is rotatably sleeved on the outside of the fixing member (22) via a bearing assembly (244); the upper end of the cylindrical rotor (241) is detachably connected to the lower end of the mounting cylinder (243), and the detachable connection between the upper end of the cylindrical rotor (241) and the lower end of the mounting cylinder (243) is a threaded connection, a snap-fit ​​connection, or a magnetic connection.

4. The viscosity measuring device with integrated pH meter as described in claim 3, characterized in that: The upper inner wall of the cylindrical rotor (241) is fixedly provided with a threaded sleeve (2411), which has a threaded through hole in the center. The upper end of the pH meter (242) is provided with an external thread section, which is connected to the threaded through hole. The electrical connector (23) at the bottom of the fixing member (22) is an electric slip ring, and its moving ring (232b) is electrically connected to the conductive electrode (2421) at the top of the pH meter (242).

5. The viscosity measuring device with integrated pH meter as described in claim 4, characterized in that: The threaded sleeve (2411) is provided with a limiting member (2412) at the top. When the cylindrical rotor (241) is screwed into the mounting cylinder (243) to the working position, the limiting member (2412) abuts against the bottom of the fixing member (22) to restrict the pH meter (242) from continuing to move axially.

6. The viscosity measuring device with integrated pH meter as described in claim 3, characterized in that: The rotary drive mechanism (25) includes: The motor (251) is fixedly installed at the bottom of the connecting frame (21) and located on one side of the fixing member (22); The mounting plate (252) is coaxially connected to the output shaft of the motor (251); A first magnetic ring (253) is disposed in a mounting plate (252), the first magnetic ring (253) comprising a plurality of first magnets (2531) with alternating polarities evenly distributed in the circumferential direction; The second magnetic ring (254) is disposed in the mounting cylinder (243), and the second magnetic ring (254) includes a plurality of second magnets (2541) with alternating polarities evenly distributed in the circumferential direction; The first magnetic ring (253) and the second magnetic ring (254) transmit torque through magnetic coupling, driving the mounting cylinder (243) and the cylindrical rotor (241) to rotate.

7. The viscosity measuring device with integrated pH meter as described in claim 6, characterized in that: The mounting plate (252) is provided with a plurality of first magnetic rings (253) arranged along the axial direction, and the N and N poles of each first magnetic ring (253) are aligned axially; the mounting cylinder (243) is provided with the same number of second magnetic rings (254) as the first magnet (2531), and the N and N poles of each second magnetic ring (254) are aligned axially; wherein, the magnetic pole axial directions of each layer of first magnetic rings (253) correspond one-to-one with those of the corresponding layer of second magnetic rings (254).

8. The viscosity measuring device with integrated pH meter as described in claim 6, characterized in that: The torque detection unit (26) is a strain sensor, which is located at the connection between the mounting plate (252) and the motor (251) shaft, and is used to detect the output torque of the motor (251).

9. The viscosity measuring device with integrated pH meter as described in claim 6, characterized in that: The torque detection unit (26) is a Hall sensor, fixed to the outside of the fixture (22), and is used to calculate the rotational resistance torque based on the phase difference of the magnetic field.

10. The viscosity measuring device with integrated pH meter as described in claim 1, characterized in that: The measuring mechanism (2) also includes a processor (3), which is fixedly mounted above the connecting frame (21) for electrical connection with the electrical connector (23) and the torque detection unit (26).

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