PH testing device and method used in veterinary drug processing process
By designing a pH testing device with a self-cleaning protective cover and a telescopic drive mechanism during veterinary drug processing, the problem of pH testing devices being easily contaminated during veterinary drug processing has been solved, achieving high-precision and low-maintenance online monitoring.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-26
- Publication Date
- 2026-04-10
AI Technical Summary
In existing veterinary drug processing, pH testing devices are susceptible to impurities in the fermentation broth, leading to measurement accuracy drift and data distortion, high maintenance costs, and cumbersome operation.
A device comprising a pH detection probe, a central control unit, and a signal conditioning module was designed. It employs a self-cleaning protective cover and a telescopic drive mechanism to achieve online cleaning of the probe through hydrodynamics, preventing the accumulation of contaminants and ensuring measurement accuracy.
It achieves long-term accurate monitoring of pH value, avoids performance degradation and signal drift caused by the accumulation of pollutants, reduces maintenance costs, and realizes online monitoring without human intervention throughout the entire process.
Smart Images
Figure CN121830850A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of veterinary drug production and testing technology, specifically a pH testing device and method for use in the veterinary drug processing. Background Technology
[0002] In the veterinary drug processing, pH value is a key parameter for regulating product quality, ensuring process stability, and improving production efficiency. Especially in processing steps that rely on microbial metabolism or enzyme catalysis, the precise control of pH value directly determines the growth activity of microorganisms, the efficiency of metabolite synthesis, or the specificity and conversion rate of enzyme catalysis. Therefore, real-time and precise monitoring and control of pH value during processing is of irreplaceable importance.
[0003] In the current veterinary drug processing field, common online pH testing solutions involve directly inserting pH detection elements into the processing system under test within the veterinary drug processing pipeline to acquire signals. However, existing pH testing solutions still have many shortcomings in practical applications of veterinary drug processing, severely limiting their widespread application in efficient and automated veterinary drug production: First, the detection elements have poor anti-interference capabilities. The fermentation broth in the veterinary drug processing system contains impurities such as mycelium and suspended particles, which easily adhere to the sensitive end of the detection element. At the same time, some veterinary drug raw materials are highly corrosive, which can easily lead to the performance degradation of the detection element, thereby causing measurement accuracy drift and data distortion. Second, maintenance costs are high and operations are cumbersome. Affected by material adhesion and corrosion, the detection element needs to be frequently disassembled, cleaned, and calibrated, which not only interrupts the continuous production process but also increases manual maintenance costs.
[0004] Therefore, it is necessary to develop a pH testing device and method for use in veterinary drug processing to solve the above problems. Summary of the Invention
[0005] The purpose of this invention is to address the shortcomings of existing veterinary drug processing systems, where fermentation broth contains impurities such as mycelium and suspended particles, which easily adhere to the sensitive end of the detection element, leading to performance degradation of the detection element and consequently causing measurement accuracy drift and data distortion. The invention proposes a garlic sprouting device and method for agricultural production.
[0006] A pH testing device for use in veterinary drug processing includes a pH detection probe, a central control unit, and a signal conditioning module. The signal conditioning module is electrically connected to the pH detection probe via a shielded waterproof cable and is also electrically connected to the central control unit. The pH detection probe includes a tubular outer shell and an electrode bulb, with the electrode bulb mounted at the bottom end of the tubular outer shell. It also includes a mounting flange, with a cylindrical body welded to the top of the mounting flange. A housing is bolted to the top of the cylindrical body. A drive shaft is vertically arranged inside the cylindrical body, and a telescopic drive mechanism is provided inside the housing to drive the drive shaft to move linearly along its axial direction. The central control unit is electrically connected to the telescopic drive mechanism. The top end of the tubular outer shell is fixedly connected to the bottom end of the drive shaft. A self-cleaning protective cover is provided on the outside of the pH detection probe. An annular gap is formed between the self-cleaning protective cover and the pH detection probe. An annular platform is integrally formed at the bottom end of the drive shaft. The top end of the self-cleaning protective cover is rotatably fitted onto the annular platform. An annular groove is provided on the outer wall of the top end of the self-cleaning protective cover. Multiple turbine blades are evenly distributed circumferentially in the annular groove. A drainage hole communicating with the annular gap is provided at the top of the annular groove. An outlet is provided at the bottom end of the self-cleaning protective cover.
[0007] Preferably, the telescopic drive mechanism includes a lead screw that is vertically rotatably disposed within the housing, a lead screw motor for driving the lead screw to rotate is installed on the top inner side of the housing, a drive seat is threadedly connected to the lead screw, and the top end of the drive shaft extends into the housing and is fixedly connected to the drive seat.
[0008] Preferably, a through hole is provided at the center of the top of the cylinder, the drive shaft is located in the through hole, a sealing bushing is embedded in the through hole, and the inner side of the sealing bushing forms a clearance fit with the drive shaft.
[0009] Preferably, a spiral guide groove is provided on the outer side of the self-cleaning protective cover, and the rotation direction of the spiral guide groove is the same as the rotation direction of the turbine blade.
[0010] Preferably, the radial width of the annular gap gradually decreases from the end near the drain hole to the end near the outlet, forming a tapered flow channel.
[0011] Preferably, the inner wall of the self-cleaning protective cover is provided with spiral-shaped guide ribs.
[0012] Preferably, a positioning groove is provided at the top outer side of the cylinder, and a positioning post is provided on the shell corresponding to the positioning groove, the positioning post being inserted into the positioning groove.
[0013] Preferably, the drive shaft has a hollow structure, and the shielded waterproof cable passes through the inside of the drive shaft and is electrically connected to the pH detection probe.
[0014] Preferably, the outer edge of the mounting flange is provided with a plurality of evenly distributed mounting holes, and the mounting flange is fixedly connected to the flange of the veterinary drug processing pipeline by bolts.
[0015] A method for using a pH testing device in veterinary drug processing includes the following steps: S1: Fix the pH testing device to the sampling port directly above the side wall of the veterinary drug processing pipeline using the mounting flange, so that the electrode bulb is above the liquid surface of the material being tested, and start the central control unit; S2: The central control unit controls the telescopic drive mechanism to start, driving the drive shaft to move the pH detection probe down, so that the pH detection probe is lowered to the predetermined measurement position. At this time, the electrode bulb is fully exposed in the liquid being measured. The signal conditioning module collects the raw pH electrical signal and transmits it to the central control unit for analog-to-digital conversion. S3: During the measurement process, the liquid being measured impacts the turbine blades outside the self-cleaning protective cover due to the flow generated by the pump, causing the self-cleaning protective cover to rotate continuously around the drive shaft axis. The liquid enters the annular gap through the drainage hole, forming a high-speed rotating jet that continuously scours the surface of the electrode bulb. S4: When the central control unit determines that the pH signal fluctuates abnormally or the measurement time exceeds the preset cycle, it controls the telescopic drive mechanism to drive the drive shaft to move upward, so that the pH detection probe moves upward and gets out of the liquid, while maintaining the rotation of the self-cleaning protective cover under the action of residual liquid flow. S5: After each measurement cycle, the central control unit records the current pH value and packages the data to store in the local database; S6: When the standard deviation of three consecutive measurement results exceeds 0.15 pH units, the central control unit triggers an alarm signal and automatically executes an enhanced cleaning program: controlling the telescopic drive mechanism to drive the pH detection probe to repeatedly rise and fall three times, with each pause lasting 10 seconds; S7: During the entire batch processing of veterinary drugs, the central control unit automatically executes steps S2 to S6 at set time intervals.
[0016] The beneficial effects of this invention are: When the probe is inserted into the pipeline, the flowing liquid drives the self-cleaning protective cover to rotate at high speed. A strong dynamic shearing and directional scouring flow field is generated within the annular gap formed between the inner wall of the self-cleaning protective cover and the probe surface. This continuously peels away and removes impurities attempting to adhere to the electrode bulb, physically maintaining the cleanliness of the sensitive end, i.e., the electrode bulb. Simultaneously, the probe can retract and isolate itself during non-measurement periods, avoiding unnecessary exposure. This invention, through the synergistic mechanism of telescopic drive and hydrodynamic self-cleaning, fundamentally prevents performance degradation, signal drift, and data distortion caused by contaminant accumulation, ensuring the long-term accuracy and reliability of online pH monitoring. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial structural diagram of the present invention. Figure 1 ; Figure 3 This is a partial structural diagram of the present invention. Figure 2 ; Figure 4 This is a partial cross-sectional view of the present invention. Figure 1 ; Figure 5 This is a partial cross-sectional view of the present invention. Figure 2 ; Figure 6 for Figure 5 Enlarged view of point A in the middle; Figure 7 This is a partial cross-sectional view of an embodiment of the present invention.
[0019] In the diagram: 1. pH detection probe; 101. Tubular outer shell; 102. Electrode bulb; 2. Mounting flange; 201. Mounting hole; 3. Cylinder; 301. Through hole; 302. Positioning groove; 4. Shell; 401. Positioning post; 5. Drive shaft; 501. Annular platform; 6. Telescopic drive mechanism; 601. Lead screw; 602. Lead screw motor; 603. Drive base; 7. Self-cleaning protective cover; 701. Annular groove; 702. Turbine blade; 703. Drain hole; 704. Outlet; 705. Spiral guide groove; 706. Guide rib; 8. Annular gap; 9. Sealing bushing. Detailed Implementation
[0020] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.
[0021] like Figures 1 to 7 As shown, a pH testing device for veterinary drug processing includes a pH detection probe 1, a central control unit, and a signal conditioning module. The signal conditioning module is electrically connected to the pH detection probe 1 via a shielded waterproof cable and is also electrically connected to the central control unit. The pH detection probe 1 includes a tubular housing 101 and an electrode bulb 102, with the electrode bulb 102 mounted at the bottom of the tubular housing 101. It also includes a mounting flange 2, with a cylindrical body 3 welded to the top of the mounting flange 2. A housing 4 is bolted to the top of the cylindrical body 3. A drive shaft 5 is vertically arranged inside the cylindrical body 3, and a telescopic drive mechanism 6 is provided inside the housing 4 to drive the drive shaft 5 to move linearly along the axial direction. The central control unit... The control unit is electrically connected to the telescopic drive mechanism 6. The top end of the tubular outer shell 101 is fixedly connected to the bottom end of the drive shaft 5. A self-cleaning protective cover 7 is provided on the outside of the pH detection probe 1. An annular gap 8 is formed between the self-cleaning protective cover 7 and the pH detection probe 1. An annular platform 501 is integrally formed at the bottom end of the drive shaft 5. The top end of the self-cleaning protective cover 7 is rotatably sleeved on the annular platform 501. An annular groove 701 is opened on the outer wall of the top end of the self-cleaning protective cover 7. Multiple turbine blades 702 are evenly distributed in the annular groove 701 along the circumference. A drainage hole 703 communicating with the annular gap 8 is opened at the top of the annular groove 701. An outlet 704 is opened at the bottom end of the self-cleaning protective cover 7.
[0022] like Figure 2 and Figure 4 As shown, the telescopic drive mechanism 6 includes a lead screw 601 vertically rotatably mounted inside the housing 4. A lead screw motor 602, which drives the lead screw 601 to rotate, is mounted on the top inner side of the housing 4. A drive seat 603 is threaded onto the lead screw 601. The top end of the drive shaft 5 extends into the housing 4 and is fixedly connected to the drive seat 603. When the lead screw motor 18 rotates forward or reverse, it drives the lead screw 17 to rotate, causing the drive seat 19 to move axially along the lead screw 17, thereby driving the drive shaft 7 to move up and down.
[0023] like Figure 4As shown, a through hole 301 is provided at the center of the top of the cylinder 3. The drive shaft 5 is located inside the through hole 301, and a sealing bushing 9 is embedded in the through hole 301. The inner side of the sealing bushing 9 forms a clearance fit with the drive shaft 5. The sealing bushing 9 is made of polytetrafluoroethylene. The clearance fit between the sealing bushing 9 and the drive shaft 5 ensures smooth axial movement of the drive shaft 5 and effectively prevents liquid from seeping into the interior of the housing 4 along the drive shaft 5, thus ensuring the safe operation of the electrical components.
[0024] like Figure 2 and Figure 3 As shown, a spiral guide groove 705 is provided on the outer side of the self-cleaning protective cover 7. The rotation direction of the spiral guide groove 705 is the same as the rotation direction of the turbine blade 702. When the protective cover 7 is driven to rotate by the fluid, the spiral guide groove 705 on the outer side can more effectively guide the external main fluid flow, which can not only enhance the driving efficiency of the turbine blade 702 and make the rotation of the protective cover 7 more stable, but also generate a certain axial thrust, further optimizing the overall fluid dynamic performance.
[0025] The radial width of the annular gap 8 gradually decreases from the end near the inlet 703 to the end near the outlet 704, forming a narrowing flow channel. According to fluid dynamics principles, the flow velocity increases when the fluid flows through the narrowing channel. This design causes the cleaning fluid entering from the inlet 703 to gradually increase in velocity and kinetic energy as it flows toward the sensitive end of the probe, i.e., the electrode bulb 102. Finally, near the outlet 704, the most critical measurement area, a higher-velocity, stronger-momentum scouring jet is formed, thereby significantly improving the removal and cleaning effect on the surface of the sensitive end of the probe.
[0026] like Figure 7 As shown, the inner wall of the self-cleaning protective cover 7 is provided with spiral-shaped flow-guiding ribs 706. The flow-guiding ribs 706 firstly directly enhance the shearing action of the fluid between the protective cover 7 and the surface of the pH detection probe 1, more effectively agitating and removing adhering substances. Secondly, the spiral structure converts the circumferential motion of the protective cover 7 rotation into an axial pumping force that drives the fluid to flow towards the electrode bulb 102, strengthening the axial delivery and renewal of the cleaning fluid and ensuring that the cleaning effect covers the entire working surface of the pH detection probe 1.
[0027] like Figure 2 and Figure 4 As shown, a positioning groove 302 is provided at the top outer side of the cylinder 3, and a positioning post 401 is provided on the housing 4 corresponding to the positioning groove 302. The positioning post 401 is inserted into the positioning groove 302. The positioning grooves 302 and 401 provide precise positioning for the connection between the housing 4 and the cylinder 3, improve the accuracy of the vertical posture of the pH detection probe, and thus ensure measurement accuracy.
[0028] The drive shaft 5 has a hollow structure, and a shielded waterproof cable passes through the inside of the drive shaft 5 and is electrically connected to the pH detection probe 1. The signal conditioning module is electrically connected to the lead-out electrode of the pH detection probe 1 via the shielded waterproof cable, and is used to amplify and filter the raw pH electrical signal. The output of the signal conditioning module is connected to the analog input port of the central control unit, and the digital output port of the central control unit is electrically connected to the driver of the lead screw motor 602, realizing precise control of the telescopic drive mechanism 6. The central control unit can be an industrial-grade PLC or an embedded microcontroller, and has data storage, logic judgment, and communication functions.
[0029] like Figure 1 and Figure 2 As shown, the outer edge of the mounting flange 2 is provided with multiple evenly distributed mounting holes 201, and the mounting flange 2 is fixedly connected to the flange of the veterinary drug processing pipeline by bolts.
[0030] In practical applications, this pH testing device is fixedly installed above the sampling port on the side wall of a veterinary drug processing pipeline, such as a fermentation broth circulation pipeline or a reaction liquid delivery pipeline, via mounting flange 2, so that the electrode bulb 102 is positioned above the liquid surface of the material being tested. After the central control unit is started, the measurement process begins. First, the central control unit controls the lead screw motor 602 to rotate forward, driving the lead screw 601 to move the drive seat 603 downward, which in turn causes the drive shaft 5 to lower the pH detection probe 1 to the predetermined measurement position. At this time, the electrode bulb 102 is fully exposed in the liquid being tested, and the signal conditioning module begins to collect the raw pH electrical signal and transmits it to the central control unit for analog-to-digital conversion to obtain the real-time pH value.
[0031] During the measurement process, the liquid is in a continuous flow state because veterinary drug processing pipelines are usually equipped with circulation pumps. The flowing liquid impacts the turbine blades 702 on the outside of the self-cleaning protective cover 7, causing the self-cleaning protective cover 7 to rotate continuously around the axis of the drive shaft 5. Some liquid enters the annular gap 8 through the drainage hole 703. The rotation of the protective cover 7 acts as a centrifugal pump, promoting this process. When the self-cleaning protective cover 7 rotates around the pH detection probe 1 under fluid drive, the inner wall of the self-cleaning protective cover 7 drives the medium in the annular gap 8 to generate circumferential shear motion through fluid viscosity. At the same time, the axial pressure difference between the drainage hole 703 and the outlet 704, together with the centrifugal effect generated by the rotation, jointly drive the medium to form a net flow from top to bottom in the annular gap 8. This flow flows downward along the surface of the pH detection probe 1, continuously scouring the electrode bulb 102, realizing a basic online cleaning function, effectively removing adhering substances and preventing contamination.
[0032] To further enhance and optimize the cleaning effect, the present invention also provides the following preferred solutions: By providing flow-guiding ribs 706 on the inner wall of the self-cleaning protective cover 7, the aforementioned circumferential shear flow can be actively guided and strengthened to transform into a more ordered and powerful axial wall-following scouring jet. Similarly, by designing the annular gap 8 as a gradually narrowing flow channel, the fluid flowing towards the electrode bulb 102 can be further accelerated using the Venturi effect, thereby obtaining higher scouring kinetic energy and shear force in this critical area, ensuring more thorough and efficient cleaning.
[0033] When the central control unit determines that the pH signal has abnormal fluctuations, such as sudden changes exceeding the set threshold, or that the measurement time exceeds the preset cycle, it controls the lead screw motor 602 to reverse, causing the drive shaft 5 to move the pH detection probe 1 upwards, removing it from the liquid environment. During this process, the self-cleaning protective cover 7 maintains a certain rotation speed due to residual liquid flow or inertia, continuing to perform dry self-cleaning of the electrode bulb 102, further removing residual liquid and particles.
[0034] After each measurement cycle, the central control unit records the current pH value and stores the data in a local database to support subsequent process analysis and quality traceability. If the standard deviation of three consecutive measurements exceeds 0.15 pH units, the central control unit determines that there is electrode contamination or drift anomaly, triggers an alarm signal, and automatically executes an enhanced cleaning procedure: the control screw motor 602 drives the pH detection probe 1 to repeatedly rise and fall three times, pausing for 10 seconds after each descent to the measurement position. The impact of the liquid on the turbine blades 702 enhances the driving torque, increases the rotation speed of the self-cleaning protective cover 7, and thus increases the rinsing intensity. This process restores electrode performance without manual intervention.
[0035] Throughout the entire veterinary drug processing batch operation, the central control unit automatically executes the above measurement and self-cleaning processes at set time intervals, realizing online pH monitoring and self-maintenance without human intervention throughout the entire process.
[0036] All contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are not shown in the figures because they are existing technologies, and will not be described here.
[0037] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.
Claims
1. A pH testing device for use in veterinary drug processing, comprising a pH detection probe (1), a central control unit, and a signal conditioning module, wherein the signal conditioning module is electrically connected to the pH detection probe (1) via a shielded waterproof cable, and the signal conditioning module is electrically connected to the central control unit; the pH detection probe (1) comprises a tubular shell (101) and an electrode bulb (102), the electrode bulb (102) being mounted at the bottom end of the tubular shell (101), characterized in that, It also includes a mounting flange (2), the top of which is welded to a cylindrical body (3), and the top of the cylindrical body (3) is fixedly mounted with a housing (4) by bolts. A drive shaft (5) is vertically arranged inside the cylindrical body (3), and a telescopic drive mechanism (6) is provided inside the housing (4) to drive the drive shaft (5) to move linearly along the axial direction. The central control unit is electrically connected to the telescopic drive mechanism (6). The top of the tubular outer shell (101) is fixedly connected to the bottom of the drive shaft (5). A self-cleaning protective cover (7) is provided on the outside of the pH detection probe (1). An annular gap (8) is formed between the drive shaft (5) and the pH detection probe (1). An annular platform (501) is integrally formed at the bottom end of the drive shaft (5). The top end of the self-cleaning protective cover (7) is rotatably sleeved on the annular platform (501). An annular groove (701) is provided on the outer side wall of the top end of the self-cleaning protective cover (7). Multiple turbine blades (702) are evenly distributed in the annular groove (701) along the circumference. A drainage hole (703) communicating with the annular gap (8) is provided at the top of the annular groove (701). An outlet (704) is provided at the bottom end of the self-cleaning protective cover (7).
2. The pH testing device for veterinary drug processing according to claim 1, characterized in that, The telescopic drive mechanism (6) includes a lead screw (601) that is vertically rotatably disposed in the housing (4). A lead screw motor (602) for driving the lead screw (601) to rotate is installed on the top inner side of the housing (4). A drive seat (603) is threadedly connected to the lead screw (601). The top end of the drive shaft (5) extends into the housing (4) and is fixedly connected to the drive seat (603).
3. The pH testing device for veterinary drug processing according to claim 2, characterized in that, The top center of the cylinder (3) is provided with a through hole (301), the drive shaft (5) is located in the through hole (301), and a sealing bushing (9) is embedded in the through hole (301). The inner side of the sealing bushing (9) and the drive shaft (5) form a clearance fit.
4. The pH testing device for veterinary drug processing according to claim 2, characterized in that, The self-cleaning protective cover (7) has a spiral guide groove (705) on its outer side, and the rotation direction of the spiral guide groove (705) is the same as the rotation direction of the turbine blade (702).
5. The pH testing device for veterinary drug processing according to claim 4, characterized in that, The radial width of the annular gap (8) gradually decreases from the end near the drain hole (703) to the end near the outlet (704), forming a gradually narrowing flow channel.
6. The pH testing device for veterinary drug processing according to claim 1, characterized in that, The self-cleaning protective cover (7) has spiral-shaped guide ribs (706) on its inner wall.
7. The pH testing device for veterinary drug processing according to claim 1, characterized in that, The outer top of the cylinder (3) is provided with a positioning groove (302), and a positioning post (401) is provided on the shell (4) corresponding to the positioning groove (302). The positioning post (401) is inserted into the positioning groove (302).
8. The pH testing device for veterinary drug processing according to claim 1, characterized in that, The drive shaft (5) is a hollow structure, and the shielded waterproof cable passes through the inside of the drive shaft (5) and is electrically connected to the pH detection probe (1).
9. The pH testing device for veterinary drug processing according to claim 1, characterized in that, The outer edge of the mounting flange (2) is provided with a plurality of evenly distributed mounting holes (201), and the mounting flange (2) is fixedly connected to the flange of the veterinary drug processing pipeline by bolts.
10. A method of using a pH testing device for veterinary drug processing according to any one of claims 1-9, characterized in that, Includes the following steps: S1: Fix the pH testing device to the sampling port directly above the side wall of the veterinary drug processing pipeline through the mounting flange (2), so that the electrode bulb (102) is above the liquid surface of the material being tested, and start the central control unit; S2: The central control unit controls the telescopic drive mechanism (6) to start, drives the drive shaft (5) to move the pH detection probe (1) down, so that the pH detection probe (1) is lowered to the predetermined measurement position. At this time, the electrode bulb (102) is completely exposed in the liquid to be measured. The signal conditioning module collects the original pH electrical signal and transmits it to the central control unit for analog-to-digital conversion. S3: During the measurement process, the liquid being measured impacts the turbine blades (702) outside the self-cleaning protective cover (7) due to the flow generated by the pumping, causing the self-cleaning protective cover (7) to rotate continuously around the axis of the drive shaft (5). The liquid enters the annular gap (8) through the drainage hole (703) to form a high-speed rotating jet, which continuously scours the surface of the electrode bulb (102). S4. When the central control unit determines that the pH signal fluctuates abnormally or the measurement time exceeds the preset cycle, it controls the telescopic drive mechanism (6) to drive the drive shaft (5) to move upward, so that the pH detection probe (1) moves upward and gets out of the liquid, while maintaining the rotation state of the self-cleaning protective cover (7) under the action of residual liquid flow. S5: After each measurement cycle, the central control unit records the current pH value and packages the data to store in the local database; S6: When the standard deviation of three consecutive measurement results exceeds 0.15 pH units, the central control unit triggers an alarm signal and automatically executes an enhanced cleaning program: control the telescopic drive mechanism (6) to drive the pH detection probe (1) to repeatedly rise and fall three times, with each dwell time being 10 seconds; S7: During the entire batch processing of veterinary drugs, the central control unit automatically executes steps S2 to S6 at set time intervals.