Online cleaning device for industrial pH meter

Abstract

The utility model discloses an industrial pH meter on-line cleaning device which comprises a cleaning pure water main pipeline, pH electrodes and a liquid discharging main pipeline, the number of the pH electrodes is not less than two, the industrial pH meter on-line cleaning device further comprises ultrasonic cleaning flow cells in one-to-one correspondence with the pH electrodes, and the pH electrodes are located in the ultrasonic cleaning flow cells; the ultrasonic cleaning flow cell is communicated with the cleaning pure water main pipeline through a split-flow cleaning liquid system and is communicated with the pH monitoring main pipeline through a measuring liquid inlet system, and the ultrasonic cleaning flow cell is communicated with the liquid drainage main pipeline through a liquid drainage branch pipe with a liquid drainage electromagnetic valve; the device further comprises a PLC automatic control box. The device has the beneficial effects that through automatic control, efficient cleaning and monitoring of the pH electrode are achieved, the accuracy of a detection result is improved, and the application prospect is wide.

Description

Technical Field

[0001] The utility model relates to the field of chemical industry, in particular to an online cleaning device for an industrial pH meter. Background Art

[0002] In the production process of the chemical and environmental protection industries, online measurement of the pH value of materials is usually achieved by installing pH meter electrodes in the pipeline for real-time monitoring. However, the traditional installation method places the electrode probe directly at the opening of the main process pipeline, which easily leads to long-term contact between the electrode head and the material, and then accumulates sediment, stains and dirt, which will seriously affect the measurement accuracy of the electrode.

[0003] Compared with the Chinese patent document with publication number CN206930617U, an online pH detector and its system for automatically cleaning electrodes are disclosed. The detector includes: a sampling test tank, a pH meter probe is provided in the test socket of the sampling test tank, and the pH meter probe and the sampling test tank are sealed; the two sides of the sampling test tank are respectively provided with a clean water inlet and a test water inlet; a water ejector is provided at the clean water inlet, and the two ends of the water ejector are respectively provided with a first control valve and a second control valve; the test water inlet is connected to the test water pipeline through a pipeline; a probe cleaning body is provided in the sampling test tank. The system includes a controller, a processor, a display and a pH detector; the processor is electrically connected to the pH meter probe.

[0004] The above patent can only flush the pH meter probe, but the flushing effect is poor and it is difficult to clean the stubborn dirt.

[0005] Therefore, providing an online cleaning device for an industrial pH meter has become an issue worthy of study. Summary of the invention

[0006] In order to solve the deficiencies in the above-mentioned prior art, the purpose of the utility model is to clean the pH electrode through automatic control without stopping the machine, thereby ensuring the monitoring effect of the pH monitoring main pipeline and having high cleaning efficiency and good effect on the pH electrode.

[0007] The purpose of the utility model is achieved in this way:

[0008] The utility model provides an industrial pH meter online cleaning device, comprising a cleaning pure water main pipeline, a pH electrode and a drainage main pipeline, wherein the number of the pH electrodes is not less than two, and also comprising an ultrasonic cleaning circulation pool corresponding to the pH electrodes one by one, wherein the pH electrode is located inside the ultrasonic cleaning circulation pool, and the pH electrode is electrically connected to a terminal device on the pH monitoring main pipeline;

[0009] The ultrasonic cleaning circulation pool is connected to the cleaning pure water main pipeline via a split washing liquid system, and is connected to the pH monitoring main pipeline via a measuring liquid inlet system. The ultrasonic cleaning circulation pool is connected to the drainage main pipeline via a drainage branch pipe with a drainage solenoid valve.

[0010] It also includes a PLC automatic control box, and the ultrasonic cleaning circulation pool, the diversion washing liquid system, the measuring liquid inlet system, and the drain solenoid valve are all electrically connected to the control circuit in the PLC automatic control box.

[0011] It is further described that the number of the pH electrodes is two.

[0012] It is further described that the diversion washing liquid system includes a cleaning pipeline branch with a cleaning branch valve filter and a cleaning branch solenoid valve, the cleaning pipeline branch is connected between the cleaning pure water main pipeline and the ultrasonic cleaning circulation pool, and the cleaning branch solenoid valve is electrically connected to the control circuit in the PLC automatic control box.

[0013] It is further described that the measuring liquid inlet system includes a monitoring branch line, which is connected between the pH monitoring main pipeline and the ultrasonic cleaning circulation pool. A monitoring branch solenoid valve is provided on the monitoring branch line, and the monitoring branch solenoid valve is electrically connected to the control circuit in the PLC automatic control box.

[0014] It is further explained that the cleaning pure water main pipeline is provided with a cleaning main pipeline pressure gauge, and the pH monitoring main pipeline is provided with a monitoring main pipeline pressure gauge and a monitoring main pipeline solenoid valve.

[0015] It is further explained that the cleaning pure water main pipeline is connected to an air supply system, and the cleaning pure water main pipeline is provided with a cleaning main solenoid valve.

[0016] It is further described that the air supply system includes an air intake branch pipe, one end of which is connected to the cleaning pure water main pipe, and an air intake pump and an air intake valve are provided on the air intake branch pipe. The air intake valve is connected between the air intake pump and the cleaning pure water main pipe, and the air intake pump and the air intake valve are electrically connected to the PLC automatic control box.

[0017] It is further described that the ultrasonic cleaning circulation pool includes a water pool and an ultrasonic generator, wherein the ultrasonic generator is connected to a transducer located at the bottom of the water pool, and the ultrasonic generator is electrically connected to a control circuit in the PLC automatic control box.

[0018] It is further described that the PLC automatic control box is electrically connected to the control terminal of the pH monitoring main pipeline.

[0019] It is further described that it also includes a skid-mounted fully sealed cabinet, the ultrasonic cleaning circulation pool, the diversion washing liquid system, the measuring liquid inlet system, and the drainage branch pipe are all located inside the skid-mounted fully sealed cabinet, and the outer ends of the pH monitoring main pipeline and the drainage main pipeline pass through the skid-mounted fully sealed cabinet.

[0020] Positive beneficial effects:

[0021] This device realizes efficient cleaning and monitoring of pH electrodes through automatic control, greatly improving the pH value detection and cleaning effects, as follows:

[0022] 1. Non-stop monitoring: The alternating operation of multiple pH electrodes enables the pH value of the liquid in the pH monitoring main pipeline to be continuously detected without stopping the machine, ensuring the accuracy and reliability of real-time monitoring data;

[0023] 2. Efficient cleaning: It has multiple cleaning methods such as electrode soaking, ultrasonic cleaning and flushing, which ensures the thorough cleaning of the pH electrode, reduces the cleaning time, improves the cleaning effect and prolongs the service life of the electrode;

[0024] 3. Intelligent control: The PLC automatic control box makes the coordination between the systems more efficient, and can flexibly adjust the cleaning mode and working status according to different working conditions, thus improving the automation level and operation convenience of the system;

[0025] 4. Optimization of the diversion system: The diversion washing liquid system and the measuring liquid inlet system can achieve reasonable switching between detection and cleaning, avoid liquid cross contamination, improve the accuracy of the test results, and have good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is the process flow instrument control principle diagram of the utility model;

[0027] Figure 2 This is a process flow instrument control principle diagram of the third embodiment of the utility model;

[0028] The figure shows: cleaning pure water main pipeline 1, cleaning pipeline branch 101, cleaning branch solenoid valve 102, cleaning branch valve filter 103, cleaning main pipe pressure gauge 104, cleaning main pipe solenoid valve 105, pH monitoring main pipeline 2, monitoring branch pipeline 201, monitoring branch solenoid valve 202, monitoring main pipe pressure gauge 203, monitoring main pipe solenoid valve 204, drainage main pipeline 3, drainage branch pipe 301, drainage solenoid valve 302, pH electrode 4, ultrasonic cleaning circulation pool 5, skid-mounted fully sealed cabinet 6, air intake branch pipe 7, air intake pump 701, air intake valve 702, PLC automatic control box 8. DETAILED DESCRIPTION

[0029] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0030] First embodiment:

[0031] See also Figure 1-Figure 2 As shown, the utility model provides an industrial pH meter online cleaning device, including a cleaning pure water main pipeline 1, a pH electrode 4 and a drainage main pipeline 3, the number of pH electrodes 4 is not less than two, and also includes an ultrasonic cleaning circulation pool 5 corresponding to the pH electrode 4, the pH electrode 4 is connected to the connection port above the ultrasonic cleaning circulation pool 5 through a thread, and the pH electrode 4 is electrically connected to the terminal device on the pH monitoring main pipeline 2, and the liquid pH value detected by the pH electrode 4 can be directly displayed on the terminal central control display screen on the pH monitoring main pipeline 2;

[0032] The liquid inlet of the ultrasonic cleaning circulation pool 5 is connected to the cleaning pure water main pipeline 1 through the shunt washing liquid system, the liquid inlet of the ultrasonic cleaning circulation pool 5 is connected to the pH monitoring main pipeline 2 through the measuring liquid inlet system, and the discharge port of the ultrasonic cleaning circulation pool 5 is connected to the discharge main pipeline 3 through a discharge branch pipe 301 with a discharge solenoid valve 302. When the liquid port is closed through the shunt washing liquid system and the measuring liquid inlet system is working, the pH value detection can be performed through the pH electrode 4. When the measuring liquid inlet system is closed and the liquid port is working through the shunt washing liquid system, the pH electrode 4 can be cleaned. Since there are multiple pH electrodes 4 in the device, the pH value detection of the pH monitoring main pipeline 2 can be realized without stopping by alternately working multiple pH electrodes 4;

[0033] The PLC automatic control box 8 is also included. The ultrasonic cleaning circulation pool 5, the shunt washing liquid system, the measuring liquid inlet system, and the drain solenoid valve 302 are all electrically connected to the control circuit in the PLC automatic control box 8. In specific operation, the PLC automatic control box 8 controls the measuring liquid inlet system to be closed, the drain solenoid valve 302 to be closed, the ultrasonic cleaning circulation pool 5 to be closed, and the shunt washing liquid system to be operated. Then, the cleaning liquid can be guided to the inside of the ultrasonic cleaning circulation pool 5 through the cleaning pure water main pipeline 1 and the shunt washing liquid system to realize the immersion cleaning of the pH electrode 4. The PLC automatic control box 8 controls the measuring liquid inlet system to be closed, the drain solenoid valve 302 to be closed, the ultrasonic cleaning circulation pool 5 to be closed, and the shunt washing liquid system to be operated. When the measuring liquid inlet system is closed, the discharge solenoid valve 302 is closed, the shunt washing liquid system is closed, and the ultrasonic cleaning circulation pool 5 is working, ultrasonic cleaning of the pH electrode 4 is achieved; after the cleaning is completed, the PLC automatic control box 8 controls the measuring liquid inlet system to be closed, the ultrasonic cleaning circulation pool 5 to be closed, the discharge solenoid valve 302 to be opened, and the shunt washing liquid system is working, the cleaning liquid is in a flowing state, and the cleaning liquid flows in sequence from the cleaning pure water main pipeline 1, the cleaning pipeline branch 101, the ultrasonic cleaning circulation pool 5, the discharge branch 301 and the discharge main pipeline 3 to achieve flow flushing of the pH electrode 4. ; When the PLC automatic control box 8 controls the measurement liquid inlet system to be closed, the ultrasonic cleaning circulation pool 5 to be closed, the shunt washing liquid system to be closed, and the drain solenoid valve 302 to be opened, the conduction of the drain branch pipe 301 is realized, and the liquid in the ultrasonic cleaning circulation pool 5 can be discharged through the drain branch pipe 301 and the drain main pipe 3, and the cleaning is completed; when the PLC automatic control box 8 controls the ultrasonic cleaning circulation pool 5 to be closed, the shunt washing liquid system to be closed, the drain solenoid valve 302 to be closed, and the measurement liquid inlet system to be operated, the liquid to be measured inside the pH monitoring main pipe 2 enters the ultrasonic cleaning circulation pool 5 through the measurement liquid inlet system Inside the flow cell 5, pH detection is achieved through the pH electrode 4, and the detection effect is good. The working states of the ultrasonic cleaning flow cell 5, the shunt washing liquid system, the measuring liquid inlet system, and the discharge solenoid valve 302 on different pH electrodes 4 are controlled by the PLC automatic control box 8, and different pH electrodes 4 can be controlled to work alternately. Therefore, some pH electrodes 4 can detect the pH of the liquid inside the pH monitoring main pipeline 2 without stopping the machine, and the cleaning state and cleaning mode of the pH electrode 4 can be adjusted and controlled during the cleaning work of the pH electrode 4, and the overall operation is more convenient.

[0034] Furthermore, the PLC automatic control box 8 is electrically connected to the control terminal of the pH monitoring main pipeline 2, and the corresponding working program is pre-set in the PLC automatic control box 8. The working program controls the current signal to realize the operation of the corresponding equipment in the ultrasonic cleaning circulation pool 5, the pH monitoring main pipeline 2, the shunt washing liquid system, the liquid separation and measurement liquid system, and the drainage main pipeline 3, and controls the operation and cleaning time of the pH electrode 4. The PLC automatic control box 8 is respectively connected to the power supply of the pH electrode, the monitoring pipeline solenoid valve, the cleaning pure water pipeline solenoid valve, and the ultrasonic cleaning circulation pool 5 through the current signal, and automatically switches the working state and cleaning state of the two pH meter probes according to the operating time and cleaning time pre-set by the program, and can remotely transmit the operating state to the remote control room for display.

[0035] In addition, it also includes a skid-mounted fully sealed cabinet 6, an ultrasonic cleaning circulation pool 5, a diversion washing liquid system, a measuring liquid inlet system, and a drainage branch pipe 301 are all located inside the skid-mounted fully sealed cabinet 6, and the outer ends of the pH monitoring main pipeline 2 and the drainage main pipeline 3 pass through the skid-mounted fully sealed cabinet 6. The skid-mounted fully sealed cabinet 6 is used to protect the internal devices, and more components can be integrated into a skid-mounted fully enclosed cabinet, and external interfaces and cable entrances are reserved, which can be rainproof and dustproof in outdoor environments. In addition, a movable cabinet door can be provided on the surface of the cabinet, and the cabinet door can be fixed by a lock. In this way, after the lock is opened, the components inside the skid-mounted fully sealed cabinet 6 can be conveniently managed and repaired.

[0036] The second embodiment is different from the first embodiment in that:

[0037] If there are two pH electrodes 4, then there are also two ultrasonic cleaning circulation pools 5 corresponding to the pH electrodes 4. The number of the shunt washing liquid system, the liquid separation and measurement liquid system, and the liquid discharge main pipeline 3 corresponding to the pH electrodes 4 are all set corresponding to the pH electrodes 4. In specific use, the PLC automatic control box 8 controls the operation of the corresponding equipment in the ultrasonic cleaning circulation pool 5, the pH monitoring main pipeline 2, the shunt washing liquid system, the liquid separation and measurement liquid system, and the liquid discharge main pipeline 3, so as to realize the alternating operation of the two pH electrodes 4, so as to realize the pH monitoring of the liquid in the pH monitoring main pipeline 2 without stopping the machine. When the PLC automatic control box 8 controls the operation of the pH electrode 4, the corresponding working program is pre-set, and the current signal is controlled by the working program to realize the operation of the corresponding equipment in the ultrasonic cleaning circulation pool 5, the pH monitoring main pipeline 2, the shunt washing liquid system, the liquid separation and measurement liquid system, and the liquid discharge main pipeline 3, so as to control the operation and cleaning time of the pH electrode 4. When one pH electrode 4 enters the cleaning program, the other pH electrode 4 can monitor and operate normally.

[0038] Specifically, the diversion washing liquid system includes a cleaning pipeline branch 101 with a cleaning branch valve filter 103 and a cleaning branch solenoid valve 102. The cleaning pipeline branch 101 can be connected to the cleaning pure water main pipeline 1 through a tee or an elbow pipe fitting. The cleaning pipeline branch 101 is connected to the cleaning pure water main pipeline 1 and the liquid inlet of the ultrasonic cleaning circulation pool 5 through a flange, wherein the cleaning branch valve filter 103 and the cleaning branch solenoid valve 102 are connected to the cleaning pipeline branch 101, wherein the cleaning branch valve filter 103 is close to the conveying front end of the cleaning pipeline branch 101, and the liquid entering the ultrasonic cleaning circulation pool 5 can be filtered through the cleaning branch valve filter 103, and the cleaning branch solenoid valve 102 is electrically connected to the control circuit in the PLC automatic control box 8. When it is used specifically, when the pH electrode 4 needs to be cleaned During cleaning, the PLC automatic control box 8 controls the cleaning branch pipe solenoid valve 102 to open, so that the cleaning pure water main pipeline 1 and the corresponding cleaning pipeline branch pipe 101 are connected, and the cleaning pure water main pipeline 1 can filter the cleaning liquid through the cleaning branch pipe valve filter 103, and guide the liquid to the inside of the ultrasonic cleaning circulation pool 5 through the cleaning pipeline branch pipe 101, so as to immerse the pH electrode 4. When the PLC automatic control box 8 controls the ultrasonic cleaning circulation pool 5 to work, the ultrasonic cleaning circulation pool 5 can drive the internal liquid to produce tiny bubbles, and the pH electrode 4 is cleaned with the bursting of the bubbles, thereby effectively removing the dirt and impurities on the surface of the pH electrode 4. Preferably, the cleaning liquid level pure water can clean different pH electrodes 4 by controlling the on and off of the cleaning branch pipe solenoid valve 102 on different cleaning pipeline branches 101.

[0039] The measuring liquid inlet system includes a monitoring branch pipeline 201, which is connected between the pH monitoring main pipeline 2 and the ultrasonic cleaning circulation pool 5. A monitoring branch pipe solenoid valve 202 is provided on the monitoring branch pipeline 201. The monitoring branch pipe solenoid valve 202 is located between the cleaning pipeline branch 101 and the pH monitoring main pipeline 2, and the monitoring branch pipe solenoid valve 202 is electrically connected to the control circuit in the PLC automatic control box 8. The monitoring branch pipeline 201 is connected to the pH monitoring main pipeline 2 through a tee or elbow pipe fitting, and is connected to the inlet position of the ultrasonic cleaning circulation pool 5 through the monitoring branch pipe solenoid valve 202 and a manual control valve on the monitoring branch pipeline 201. A monitoring main pipe solenoid valve 204 and a monitoring main pipe pressure gauge 204 are provided on the pH monitoring main pipeline 2. 03, wherein the monitoring main pipe pressure gauge 203 is closer to the conveying front end of the pH monitoring main pipe 2. When pH monitoring is performed, the manual control valves on all the monitoring branch pipes 201 are manually controlled to open, and the monitoring main pipe solenoid valve 204 is in an open state. The PLC automatic control box 8 controls and opens the corresponding monitoring branch pipe solenoid valve 202 to realize the connection between the pH monitoring main pipe 2 and the corresponding monitoring branch pipe 201, that is, the liquid in the pH monitoring main pipe 2 can be conducted to the inside of the ultrasonic cleaning circulation pool 5 through the monitoring branch pipe 201, and the pH electrode 4 inside the ultrasonic cleaning circulation pool 5 is used for pH monitoring, and the monitored pH value is displayed through the terminal central control display screen, thereby realizing pH feedback.

[0040] In addition, the cleaning pipeline branch 101 is connected to the middle section of the monitoring branch pipeline 201, that is, the cleaning pipeline branch 101 and the monitoring branch pipeline 201 are connected to the ultrasonic cleaning circulation pool 5 through the same pipeline, and the monitoring branch solenoid valve 202 and the manual control valve on the pH monitoring main pipeline 2 are both located between the cleaning pipeline branch 101 and the pH monitoring main pipeline 2.

[0041] In some embodiments, a one-way valve is provided on the monitoring branch pipeline 201 to prevent the liquid inside the ultrasonic cleaning circulation pool 5 from flowing back into the monitoring branch pipeline 201 and the pH monitoring main pipeline 2 .

[0042] Furthermore, a cleaning main pipe pressure gauge 104 is provided on the cleaning pure water main pipe 1, and a monitoring main pipe pressure gauge 203 and a monitoring main pipe solenoid valve 204 are provided on the pH monitoring main pipe 2. The cleaning liquid pressure in the cleaning pure water main pipe 1 can be detected by the cleaning main pipe pressure gauge 104. When flushing the pH electrode 4, the cleaning liquid can have a certain pressure, which has a better flushing effect on the pH electrode 4. The pressure of the liquid to be tested in the pH monitoring main pipe 2 can be monitored by the monitoring main pipe pressure gauge 203, and the conduction and closing of the pH monitoring main pipe 2 can be controlled by the monitoring main pipe solenoid valve 204.

[0043] The third embodiment is different from the second embodiment in that:

[0044] See also Figure 2 As shown, the cleaning pure water main pipeline 1 is connected to an air supply system, and a cleaning main pipe solenoid valve 105 is provided on the cleaning pure water main pipeline 1. The cleaning main pipe solenoid valve 105 and the cleaning main pipe pressure gauge 104 are located at the delivery front end of the air supply system, and the cleaning main pipe solenoid valve 105 is arranged close to the air supply system. The air supply system includes an air intake branch pipe 7, and the air intake branch pipe 7 is connected to the cleaning pure water main pipeline 1 through a three-way pipe fitting at one end thereof facing the cleaning pure water main pipeline 1. The connection end of the air intake branch pipe 7 and the cleaning pure water main pipeline 1 is close to the cleaning main pipe solenoid valve 105. An air intake pump 701 and an air intake valve 702 are provided on the air intake branch pipe 7, and the air intake valve 702 is connected to the air intake pump Further, between 701 and the cleaning pure water main pipeline 1, an air filter is connected to the end of the air intake branch pipe 7, and the air intake pump 701 and the air intake valve 702 are electrically connected to the PLC automatic control box 8. After the pH electrode 4 is cleaned, the valve on the drain solenoid valve 302 is opened by the PLC automatic control box 8, and the cleaning liquid in the ultrasonic cleaning circulation pool 5 can be discharged through the drain branch pipe 301. At the same time, in order to avoid liquid residue in the cleaning pipeline branch pipe 101, the air intake pump 701 and the air intake valve 702 are opened by the PLC automatic control box 8, and the gas can be filtered through the air filter and then discharged through the air intake pump 7 01 and the air inlet valve 702 are guided to the inside of the cleaning pipeline branch 101, and the cleaning branch solenoid valve 102 on the corresponding cleaning pipeline branch 101 is controlled to open by the PLC automatic control box 8, so that the gas can be exported through the cleaning pipeline branch 101, the ultrasonic cleaning circulation pool 5 and the drainage branch 301 in sequence, so as to realize the cleaning of the corresponding pipeline. Furthermore, when installing and connecting the ultrasonic cleaning circulation pool 5, the cleaning pipeline branch 101 and the monitoring branch 201 are inclined, and the ultrasonic cleaning circulation pool 5 is located at the bottom of the cleaning pipeline branch 101 and the monitoring branch 201, which can assist in cleaning the pipeline. The liquid in the branch pipe 101 and the monitoring branch pipe 201 circulates, and the connecting end of the drainage branch pipe 301 and the ultrasonic cleaning circulation pool 5 is arranged close to the lower end of the ultrasonic cleaning circulation pool 5, which can assist in completely draining out the liquid in the ultrasonic cleaning circulation pool 5, thereby reducing the residual liquid inside the ultrasonic cleaning circulation pool 5 and the drainage branch pipe 301. When in use, the air supply system can assist the flow of residual liquid in the cleaning pipeline branch pipe 101, the ultrasonic cleaning circulation pool 5, and the drainage main pipeline 3. At the same time, when the temperature of the gas entering the air inlet branch pipe 7 is hot air, the drying operation inside the pipeline can be better achieved.

[0045] Furthermore, the ultrasonic cleaning circulation pool 5 includes a water pool and an ultrasonic generator, wherein the ultrasonic generator is connected to a transducer located at the bottom of the water pool, and the ultrasonic generator is electrically connected to a control circuit in a PLC automatic control box 8. The PLC automatic control box 8 can control the ultrasonic generator to work, thereby driving the internal liquid of the ultrasonic cleaning circulation pool 5 to oscillate through the transducer, thereby assisting in cleaning the pH electrode 4.

[0046] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An online cleaning device for an industrial pH meter, comprising a cleaning pure water main pipeline (1), a pH electrode (4) and a drainage main pipeline (3), characterized in that: The number of the pH electrodes (4) is not less than two, and also includes an ultrasonic cleaning circulation pool (5) corresponding to the pH electrodes (4) one by one, the pH electrodes (4) are located inside the ultrasonic cleaning circulation pool (5), and the pH electrodes (4) are electrically connected to a terminal device on the pH monitoring main pipeline (2); The ultrasonic cleaning circulation pool (5) is connected to the cleaning pure water main pipeline (1) via a split washing liquid system, and is connected to the pH monitoring main pipeline (2) via a measuring liquid inlet system. The ultrasonic cleaning circulation pool (5) is connected to the drainage main pipeline (3) via a drainage branch pipe (301) with a drainage solenoid valve (302); It also includes a PLC automatic control box (8), and the ultrasonic cleaning circulation pool (5), the split-flow washing liquid system, the measuring liquid inlet system, and the liquid discharge solenoid valve (302) are all electrically connected to a control circuit in the PLC automatic control box (8).

2. An industrial pH meter online cleaning device according to claim 1, characterized in that: The number of the pH electrodes (4) is two.

3. An industrial pH meter online cleaning device according to claim 1 or 2, characterized in that: The split-flow washing liquid system comprises a cleaning pipeline branch pipe (101) having a cleaning branch pipe valve filter (103) and a cleaning branch pipe solenoid valve (102); the cleaning pipeline branch pipe (101) is connected between the cleaning pure water main pipeline (1) and the ultrasonic cleaning circulation pool (5); and the cleaning branch pipe solenoid valve (102) is electrically connected to a control circuit in the PLC automatic control box (8).

4. An industrial pH meter online cleaning device according to claim 3, characterized in that: The measuring liquid inlet system comprises a monitoring branch pipeline (201), wherein the monitoring branch pipeline (201) is connected between the pH monitoring main pipeline (2) and the ultrasonic cleaning circulation pool (5), and a monitoring branch pipeline solenoid valve (202) is provided on the monitoring branch pipeline (201), and the monitoring branch pipeline solenoid valve (202) is electrically connected to a control circuit in the PLC automatic control box (8).

5. An industrial pH meter online cleaning device according to claim 4, characterized in that: The cleaning pure water main pipeline (1) is provided with a cleaning main pipeline pressure gauge (104), and the pH monitoring main pipeline (2) is provided with a monitoring main pipeline pressure gauge (203) and a monitoring main pipeline solenoid valve (204).

6. An industrial pH meter online cleaning device according to claim 5, characterized in that: The cleaning pure water main pipeline (1) is connected to an air supply system, and the cleaning pure water main pipeline (1) is provided with a cleaning main electromagnetic valve (105).

7. An industrial pH meter online cleaning device according to claim 6, characterized in that: The air supply system comprises an air intake branch pipe (7), one end of the air intake branch pipe (7) being connected to the main cleaning pure water pipe (1), an air intake pump (701) and an air intake valve (702) being provided on the air intake branch pipe (7), the air intake valve (702) being connected between the air intake pump (701) and the main cleaning pure water pipe (1), and the air intake pump (701) and the air intake valve (702) being electrically connected to the PLC automatic control box (8).

8. The online cleaning device for an industrial pH meter according to claim 1, characterized in that: The ultrasonic cleaning circulation pool (5) comprises a water pool and an ultrasonic generator, wherein the ultrasonic generator is connected to a transducer located at the bottom of the water pool, and the ultrasonic generator is electrically connected to a control circuit in the PLC automatic control box (8).

9. The online cleaning device for an industrial pH meter according to claim 1, characterized in that: The PLC automatic control box (8) is electrically connected to the control terminal of the pH monitoring main pipeline (2).

10. An industrial pH meter online cleaning device according to claim 1, characterized in that: It also includes a skid-mounted fully sealed cabinet (6), wherein the ultrasonic cleaning circulation pool (5), the split-flow washing liquid system, the measuring liquid inlet system, and the drainage branch pipe (301) are all located inside the skid-mounted fully sealed cabinet (6), and the outer ends of the pH monitoring main pipeline (2) and the drainage main pipeline (3) pass through the skid-mounted fully sealed cabinet (6).

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