An online control device for the acidity and alkalinity of industrial fluids

Abstract

This invention provides an online pH control device for industrial fluids, characterized by comprising a pH adjustment agent dispensing unit and a pH detection unit. The pH adjustment agent dispensing unit dispenses a pH adjustment agent into the fluid tank. The pH detection unit comprises a pH detection chamber, a pH detection device, and a liquid collection device. One end of the liquid collection device is inserted into the liquid phase of the fluid tank, and the other end is connected to the pH detection chamber to input a liquid sample from the fluid tank into the pH detection chamber. The pH detection device is installed in the pH detection chamber to detect the input liquid sample. This device features high sensitivity, a compact structure, and small size, making it more convenient to operate and suitable for intelligent liquid storage management scenarios in fields such as machining, pharmaceuticals, environmental protection, and energy.

Description

Technical Field

[0001] This utility model relates to the field of industrial equipment technology, and in particular to an online control device for the acidity and alkalinity of industrial fluids. Background Technology

[0002] In industrial production, the pH value of industrial fluids such as water-based cutting fluids and coolants is a key parameter affecting their performance stability and service life. These fluids typically need to be maintained in a moderately alkaline environment (pH 8.5-10.0) to perform their functions of corrosion prevention, antibacterial activity, lubrication, and rust prevention. However, during long-term use, the pH value of industrial fluids may gradually decrease due to oxidation reactions, microbial metabolism, and the accumulation of acidic contaminants (such as metal ions and grease decomposition products). A decrease in pH value can trigger a series of serious problems:

[0003] Increased corrosion risk: Acidic environments accelerate the corrosion of metal processing equipment and workpieces, shorten equipment lifespan, and affect processing accuracy;

[0004] Microbial growth: A drop in pH creates conditions for the proliferation of bacteria and fungi, leading to putrid and foul-smelling fluids and increasing the risk of biofilm formation;

[0005] Deterioration of lubrication performance: The reduced surface activity of acidic fluids can easily lead to increased friction and accelerated tool wear during processing, directly affecting product quality and production costs;

[0006] Loss of stability: pH imbalance may cause the emulsion to break down and separate into layers, making the fluid lose its homogeneity, requiring frequent replacement, and increasing the cost of waste liquid treatment.

[0007] Currently, the control of pH values ​​in industrial fluids mainly relies on periodic manual sampling and testing, and manual addition of alkaline adjusters (such as organic amines and sodium hydroxide). However, traditional methods have significant drawbacks:

[0008] Detection lag: The long interval between manual sampling (usually several hours to several days) makes it difficult to capture dynamic changes in pH in a timely manner, resulting in adjustment lag and making it impossible to avoid sudden problems caused by a sudden drop in pH.

[0009] Inefficient regulation: Relying on experience to estimate the amount of regulator to add is prone to over- or under-addition, resulting in large pH fluctuations, waste of regulator, and risk of secondary pollution.

[0010] High management costs: Frequent manual operations require a large amount of human resources and may threaten personnel safety in high-temperature and high-risk industrial settings;

[0011] Data gaps: The lack of continuous monitoring data makes it difficult to establish a correlation analysis between pH change trends and process parameters, thus hindering preventative maintenance.

[0012] Although some automated pH adjustment devices have been proposed, they generally rely on offline or exposed detection technologies. Sensors are susceptible to interference from suspended particles, oil contamination, or temperature drift in the fluid, resulting in low measurement accuracy, high maintenance frequency, and difficulty in meeting the long-term stable operation requirements of complex industrial environments. Furthermore, existing systems often lack deep integration with fluid circulation pipelines, leading to low regulator dosing efficiency and difficulty in achieving rapid and accurate pH recovery.

[0013] Therefore, there is an urgent need for an intelligent control device that can monitor the pH value of industrial fluids in real time, adaptively adjust the amount of alkaline agent added, and has strong anti-interference capabilities, so as to break through the limitations of traditional management mode, ensure the stability of fluid performance, and improve the reliability and economy of production system. Utility Model Content

[0014] To address the aforementioned pain points, this invention presents an automated detection and feeding device capable of real-time online monitoring of industrial fluid pH, adaptive adjustment of alkaline agent replenishment, and strong anti-interference capabilities.

[0015] This utility model provides an online control device for the pH of industrial fluids, characterized in that it includes a pH adjustment agent dosing unit and a pH detection unit;

[0016] The pH adjustment agent dispensing unit dispenses pH adjustment agent into the fluid tank.

[0017] The aforementioned pH detection unit includes a pH detection chamber, a pH detection device, and a liquid collection device;

[0018] One end of the aforementioned liquid collection device is inserted into the liquid phase of the fluid tank, and the other end is connected to the pH detection chamber to input the liquid sample from the fluid tank into the pH detection chamber.

[0019] The aforementioned pH detection equipment is installed in a pH detection chamber to detect the input liquid samples.

[0020] Furthermore, the industrial fluid pH online control device provided by this utility model is further characterized in that:

[0021] The pH adjuster dispensing unit mentioned above includes a pH adjuster storage tank, a metering pump, and a pH adjuster delivery pipe;

[0022] The metering pump is connected to the pH adjuster storage tank and the pH adjuster delivery pipe. The pH adjuster in the pH adjuster storage tank is delivered into the fluid tank through the pH adjuster delivery pipe under the action of the metering pump.

[0023] Furthermore, the industrial fluid pH online control device provided by this utility model is further characterized in that:

[0024] The port of the liquid collection device that is inserted into the liquid phase of the fluid tank is equipped with a filtration mechanism.

[0025] Furthermore, the industrial fluid pH online control device provided by this utility model is further characterized in that:

[0026] It also includes a cleaning unit for cleaning and calibrating the pH detection chamber and pH detection equipment.

[0027] Furthermore, the industrial fluid pH online control device provided by this utility model is further characterized in that:

[0028] The aforementioned cleaning unit includes a pure water cleaning component and a buffer cleaning component;

[0029] The aforementioned pure water cleaning assembly includes a pure water storage tank, a pure water delivery mechanism, and a pure water delivery pipe;

[0030] The aforementioned pure water delivery pipe connects to the pH testing chamber and the pure water storage tank. The pure water in the pure water storage tank enters the pH testing chamber under the action of the pure water delivery mechanism on the pure water delivery pipe.

[0031] The aforementioned buffer cleaning assembly includes a buffer storage tank, a buffer delivery mechanism, and a buffer delivery pipe;

[0032] The aforementioned buffer delivery pipe connects to the pH detection chamber and the buffer storage tank. The buffer solution in the buffer storage tank enters the pH detection chamber under the action of the buffer delivery mechanism on the buffer delivery pipe.

[0033] Furthermore, the industrial fluid pH online control device provided by this utility model is further characterized in that:

[0034] It also includes a waste liquid unit;

[0035] The aforementioned waste liquid unit includes a waste liquid storage tank, a waste liquid conveying mechanism, and a waste liquid conveying pipe;

[0036] The aforementioned waste liquid delivery pipe connects to the waste liquid storage tank and the pH testing chamber. The waste liquid in the pH testing chamber enters the waste liquid storage tank through the waste liquid delivery mechanism on the waste liquid delivery pipe.

[0037] Furthermore, the industrial fluid pH online control device provided by this utility model is further characterized in that:

[0038] The aforementioned pH detection device is electrically connected to the pH adjustment agent dispensing unit;

[0039] When the result detected by the pH detection device exceeds the threshold, an electrical signal is sent to the pH adjustment agent dispensing unit.

[0040] The pH adjustment agent dispensing unit is activated by an electrical signal sent by the pH detection device, and then dispenses the pH adjustment agent into the fluid tank.

[0041] Furthermore, the industrial fluid pH online control device provided by this utility model is further characterized in that:

[0042] It also includes a signal control unit;

[0043] The aforementioned signal control unit includes a comparator;

[0044] The aforementioned pH detection equipment, pH adjustment agent dosing unit, and signal control unit are electrically connected;

[0045] The aforementioned pH detection device transmits an electrical signal containing the detection result to the signal control unit;

[0046] The comparator described above receives and compares the electrical signals sent by the pH detection device.

[0047] When the comparison result is greater than the threshold, the signal control unit sends an electrical signal to the pH adjuster dispensing unit;

[0048] The pH adjuster dispensing unit is activated when it receives an electrical signal from the signal control unit and begins dispensing the pH adjuster.

[0049] Furthermore, the industrial fluid pH online control device provided by this utility model is further characterized in that:

[0050] The aforementioned signal control unit is also electrically connected to the cleaning unit and the waste liquid unit, and sends electrical signals to the cleaning unit and the waste liquid unit.

[0051] Furthermore, the industrial fluid pH online control device provided by this utility model is further characterized in that:

[0052] The pH storage tank is also equipped with a level gauge. Attached Figure Description

[0053] Figure 1 This embodiment provides a schematic diagram of the structure of an online control device for the pH of industrial fluids;

[0054] The components include: 1-1 Industrial fluid storage tank; 1-2 Industrial fluid; 2-1 pH adjuster storage tank; 2-2 Level gauge; 2-3 Metering pump; 2-4 Signal transmission and control circuit; 2-5 Valve; 2-6 Adjuster delivery pipeline; 3-1 Pure water storage tank; 3-2 Liquid pump; 3-3 Signal transmission and control circuit; 3-4 Valve; 3-5 Pure water delivery pipeline; 4-1 Buffer solution storage tank; 4-2 Liquid pump; 4-3 Signal transmission and control circuit; 4-4 Valve; 4-5 Buffer solution delivery pipeline; 5 Signal control unit; 6 Power cord; 7-1 Valve; 7-2 Signal transmission and control circuit; 7-3 Pump; 7-4 Industrial fluid delivery pipeline; 7-5 Liquid filter; 8-1 pH signal transmission circuit; 8-2 pH probe; 8-3 pH detection chamber; 8-4 Waste liquid discharge pipeline; 8-5 Valve; 9 Waste liquid storage tank. Detailed Implementation

[0055] This invention can be implemented in many ways and has various embodiments, therefore specific embodiments are illustrated and described in the accompanying drawings. However, this is not intended to limit the invention to specific implementations, but should be understood to include all modifications, equivalents, and even substitutions that fall within the spirit and technical scope of this invention.

[0056] like Figure 1 As shown, this embodiment provides an online control device for the pH of industrial fluids, including a pH adjustment agent dosing unit, a pH detection unit, a cleaning unit, and a waste liquid unit;

[0057] pH adjustment agent dispensing unit, which dispenses pH adjustment agent into industrial fluid storage tank 1-1, includes pH adjustment agent storage tank 2-1, metering pump 2-3 and pH adjustment agent delivery pipe 2-6;

[0058] The metering pump 2-3 connects to the pH adjuster storage tank 2-1 and the pH adjuster delivery pipe 2-6. The pH adjuster in the pH adjuster storage tank 2-1 is delivered into the industrial fluid storage tank 1-1 through the pH adjuster delivery pipe 2-6 under the action of the metering pump 2-3. The end of the pH adjuster delivery pipe 2-6 can be located above the industrial fluid 1-2 or can be directly introduced into the liquid phase. This can be set according to the actual needs of use.

[0059] The pH detection unit includes a pH detection chamber 8-3, a pH detection device 8-2 (pH probe), and a liquid collection device;

[0060] One end of the liquid collection device is inserted into the liquid phase of the fluid tank. This end is equipped with a liquid filter 7-5 to filter out colloidal or particulate impurities in the liquid phase and prevent them from flowing into the detection chamber. The other end is connected to the pH detection chamber 8-3. The liquid sample in the industrial fluid storage tank 1-1 is input into the pH detection chamber 8-3 through the pump 7-3 on the industrial fluid delivery pipeline 7-4.

[0061] The pH testing device 8-2 is installed inside the pH testing chamber 8-3 to test the input liquid samples.

[0062] The cleaning unit cleans and calibrates the pH detection chamber and pH detection equipment, and includes a pure water cleaning component and a buffer cleaning component.

[0063] The pure water cleaning assembly is used to clean the testing chamber after pH testing or pH probe calibration. It includes a pure water storage tank 3-1, a pure water delivery mechanism 3-2 (liquid pump) and a pure water delivery pipe 3-5.

[0064] Pure water delivery pipe 3-5 connects to pH detection chamber 8-3 and pure water storage tank 3-1. Pure water in pure water storage tank 3-1 enters pH detection chamber 8-3 under the action of pure water delivery mechanism 3-2 on pure water delivery pipe 3-5.

[0065] The buffer cleaning assembly, which is used for pH probe calibration, includes a buffer storage tank 4-1, a buffer delivery mechanism 4-2 (liquid pump), and a buffer delivery tube 4-5.

[0066] The buffer delivery tube 4-5 connects to the pH detection chamber 8-3 and the buffer storage tank 4-1. The buffer solution in the buffer storage tank 4-1 enters the pH detection chamber 8-3 under the action of the buffer delivery mechanism 4-2 on the buffer delivery tube 4-5.

[0067] The waste liquid unit is used to collect the sample waste liquid after pH testing, the cleaning waste liquid after the probe is cleaned with pure water, and the waste liquid after the probe is calibrated with buffer solution. It includes a waste liquid storage tank 9, a waste liquid conveying mechanism, and a waste liquid conveying pipe 8-4.

[0068] Waste liquid conveying pipe 8-4 connects to waste liquid storage tank 9 and pH detection chamber 8-3. Waste liquid in pH detection chamber 8-3 enters waste liquid storage tank 9 through waste liquid conveying mechanism on waste liquid conveying pipe 8-4.

[0069] The waste liquid conveying mechanism can be a liquid pump, that is, to draw liquid from the detection chamber and deliver it to the waste liquid tank; or it can be a valve 8-5. Since the end of the waste liquid conveying pipe 8-4 that connects to the detection chamber is located at the bottom of the detection chamber, the opening and closing of the valve 8-5 can achieve the effect of whether or not waste liquid is allowed to flow out.

[0070] The electrical signal path for equipment operation can be implemented in various ways.

[0071] In one test example, the pH detection device 8-2 is electrically connected to the metering pump 2-3, the control device of the pH adjuster dosing unit;

[0072] When the result detected by the pH detection device 8-2 exceeds the threshold, an electrical signal is sent to the pH adjustment agent dosing unit. The method for determining whether the threshold is exceeded can be implemented by a comparison switch / comparator built into the pH detection device or connected to the circuit. That is, the detected signal is compared with the signal represented by the threshold to obtain the comparison result, and a signal is sent or not sent based on the comparison result.

[0073] The pH adjustment agent dispensing unit is activated by an electrical signal sent by the pH detection device, and then dispenses the pH adjustment agent into the fluid tank.

[0074] In this example, pumps 3-2, 7-3, 4-2, the pH detector, and valve 8-5 are all timed starters. They automatically shut down after a preset start time (e.g., 1-5 seconds). Specifically, pump 3-2 uses a built-in timer mechanism (similar to a mobile phone alarm clock) where the start time and frequency are manually preset at the device's front end. Pump 7-3 then starts according to the preset time. Similarly, the pH detector 8-2 also uses a preset start mechanism, with its start time delayed by 1-5 seconds from the preset time of pump 7-3. Pump 3-2 also uses a preset start mechanism, with its start time delayed by 1-5 seconds from the first preset start time of either the pH detector 8-2 or valve 8-5. Pump 4-2, according to calibration requirements... The system requires preset start-up times and frequencies. Pump 4-2 will then start at the preset times. Valve 8-5 also uses a preset start-up mechanism. Since it requires multiple drainage cycles, several start-up times need to be set. For example: the first type of start-up time is a 1-5s delay based on the preset time of pH detector 8-2, used for sample drainage; the second type of start-up time is a 1-5s delay based on the preset time of pump 3-2, or a combination of advance and delay based on the preset time of pump 4-2, used for draining washing water (this drainage step is repeated multiple times, for example: water rinsing after sample testing, rinsing before calibration, and rinsing after calibration); the third type of start-up time is a 1-5s delay based on the preset time of pump 4-2, used for draining buffer solution.

[0075] These time settings can be configured by the staff at the front end of the equipment, one by one according to different procedures.

[0076] In another experimental example, a signal control unit 5 was introduced, that is, control of various devices was achieved through centralized signal processing. Specifically:

[0077] All devices with control functions are electrically connected to the signal control unit 5;

[0078] For example: The pH detection device 8-2 of the pH detection unit is electrically connected to the signal control unit 5 through the pH signal transmission line 8-1;

[0079] The pump 7-3 of the pH detection unit is electrically connected to the signal control unit 5 via the signal transmission and control line 7-2;

[0080] The pump 2-3 of the pH adjuster dispensing unit is electrically connected to the signal control unit 5 via signal transmission and control line 2-4;

[0081] The pump 3-2 of the cleaning unit is electrically connected to the signal control unit 5 via signal transmission and control line 3-3;

[0082] The pump 4-2 of the cleaning unit is electrically connected to the signal control unit 5 via signal transmission and control line 4-3;

[0083] The valve 8-5 of the waste liquid unit is electrically connected to the signal control unit 5 via a signal transmission and control line;

[0084] The signal control unit 5 has a built-in or circuit-connected comparator (or comparator switch).

[0085] During use, the pH detection device 8-2 transmits an electrical signal of the detection result to the signal control unit;

[0086] The comparator receives the electrical signal sent by the pH detection device and compares it with a preset electrical signal;

[0087] When the comparison result shows that the electrical signal sent by the pH detection device is greater than the preset electrical signal, the signal control unit 5 sends an electrical signal to the pump 2-3 of the pH adjustment agent dispensing unit.

[0088] The pH adjuster dispensing unit is activated when it receives an electrical signal from the signal control unit and begins dispensing the pH adjuster.

[0089] The signal control unit also has a built-in or circuit-connected timer, which sends electrical signals to different control terminals at different times to activate different control terminals according to the timing rules in the previous example.

[0090] In addition, in this example, each liquid delivery pipeline can be equipped with a valve, such as valves 2-5, 3-4, 4-4, and 7-1, to control the opening and closing of the pipeline. These valves can be linked to the corresponding pump or electrically connected to the signal control unit.

[0091] Furthermore, in this example, pumps 2-3, 3-2, 7-3, 4-2, pH detector 8-2, and valves all have a mechanism that automatically shuts off after a fixed start-up time.

[0092] Considering the replenishment of contents in various storage devices, each storage device can be equipped with a level gauge 7 (level gauge 2-2 on the side of pH adjuster storage tank 2-1). This level gauge can be a conventional commercially available instrument capable of measuring the liquid level in the storage tank, or a communicating vessel structure connected to the storage tank. The level gauge can be an instrument including a warning mechanism to issue an alarm when the liquid level falls below a critical value. In addition, each storage device is also equipped with a replenishment port for replenishing the disinfectant.

[0093] The function and effect of this embodiment:

[0094] This device is placed near equipment (such as a CNC machining center), connected to a power source, and started. It uses a pH sensor to measure the pH value of the liquid in the industrial fluid storage tank in real time, and determines whether to send an activation signal to the pH adjuster dispensing device for quantitative dispensing based on the result. Alternatively, the signal can be transmitted to a microprocessor, which controls the metering pump to input the adjuster (such as organic amines, potassium hydroxide solution, etc.) through a signal control unit, thereby achieving automated control of the fluid alkalinity.

[0095] Users can set the monitoring cycle according to actual needs. For example, monitoring every 30 minutes. Industrial fluid is drawn into the pH detection chamber by a pump. The pH probe detects the fluid's pH value and automatically determines whether to activate the dispensing device or transmit the signal to the signal control unit via a signal transmission line. The signal control unit then makes a decision: when the pH is lower than the set value, the metering pump is activated, drawing pH adjuster from the storage tank and spraying it out through the nozzle outlet to adjust the pH value. One metering pump operation control logic is as follows: when the fluid pH is detected to be lower than the set data (e.g., pH=8.20), the metering pump is activated, and pH adjuster is input into the fluid storage tank in a pre-set quantity (e.g., 500mL). Monitoring is performed every 30 minutes. If the pH measurement value is above the set value, no action is required; otherwise, the aforementioned decision continues. Users can set appropriate control parameters based on factors such as the processed material, the properties of the industrial fluid, the intensity of acidic pollution, and the upper limit of pH.

[0096] The pH adjuster is filled in a pH adjuster storage tank. A level gauge installed on the side of the equipment is used to monitor the liquid level in the pH adjuster storage tank and remind operators to replenish the pH adjuster in a timely manner. The design volume of the pH adjuster storage tank is generally 10~15L, but the volume can be reduced or increased according to the characteristics of the industrial equipment and the frequency of pH adjustment under actual working conditions.

[0097] Pure water is used to clean the detection chamber and pH probe. After each test, the signal control unit controls the pump to inject pure water into the detection chamber to clean internal contaminants and keep the pH probe and detection chamber clean.

[0098] Buffer solution is used to periodically calibrate the pH probe to maintain the reliability of the pH probe's detection data. A calibration procedure is typically performed weekly, with the detection chamber and pH probe rinsed with pure water before and after calibration.

[0099] The waste liquid from the testing chamber enters the waste liquid storage tank and is treated as wastewater.

[0100] In addition, the device of this utility model can also be powered by a rechargeable battery and equipped with a power reminder function, so that there is no need for a power cord, the device is more compact and more convenient to use.

[0101] This invention features high sensitivity, a compact structure, and a small size, making it more convenient to operate and suitable for intelligent liquid storage management scenarios in fields such as machining, pharmaceuticals, environmental protection, and energy.

[0102] While the foregoing has focused on embodiments, these are merely illustrative and do not limit the invention. Those skilled in the art will understand that various modifications and applications not illustrated above can be made without departing from the essential characteristics of these embodiments. For example, the constituent elements specifically shown in the embodiments can be implemented through modifications. Furthermore, various differences related to such modifications and applications should be interpreted as being included within the scope of the invention as defined in the appended claims.

Claims

1. An industrial fluid pH on-line control apparatus, characterized by: Includes a pH adjuster dispensing unit and a pH detection unit; The pH adjustment agent dispensing unit dispenses pH adjustment agent into the fluid tank. The pH detection unit includes a pH detection chamber, a pH detection device, and a liquid collection device; One end of the liquid collection device is inserted into the liquid phase of the fluid tank, and the other end is connected to the pH detection chamber to input the liquid sample in the fluid tank into the pH detection chamber. The pH detection device is installed in the pH detection chamber to detect the input liquid sample.

2. The industrial fluid pH online control device as described in claim 1, characterized in that: The pH adjuster dispensing unit includes a pH adjuster storage tank, a metering pump, and a pH adjuster delivery pipe; The metering pump is connected to the pH adjuster storage tank and the pH adjuster delivery pipe. The pH adjuster in the pH adjuster storage tank is delivered into the fluid tank through the pH adjuster delivery pipe under the action of the metering pump.

3. The industrial fluid pH online control device as described in claim 1, characterized in that: The liquid collection device is equipped with a filtration mechanism at the port of the liquid phase end that is inserted into the fluid tank.

4. The industrial fluid pH online control device as described in claim 1, characterized in that: It also includes a cleaning unit for cleaning and calibrating the pH detection chamber and pH detection equipment.

5. The industrial fluid pH online control device as described in claim 4, characterized in that: The cleaning unit includes a pure water cleaning component and a buffer cleaning component; The pure water cleaning assembly includes a pure water storage tank, a pure water conveying mechanism, and a pure water conveying pipe; The pure water delivery pipe connects to the pH detection chamber and the pure water storage tank. The pure water in the pure water storage tank enters the pH detection chamber under the action of the pure water delivery mechanism on the pure water delivery pipe. The buffer cleaning assembly includes a buffer storage tank, a buffer delivery mechanism, and a buffer delivery pipe; The buffer delivery pipe connects to the pH detection chamber and the buffer storage tank. The buffer solution in the buffer storage tank enters the pH detection chamber under the action of the buffer delivery mechanism on the buffer delivery pipe.

6. The industrial fluid pH online control device as described in claim 5, characterized in that: It also includes a waste liquid unit; The waste liquid unit includes a waste liquid storage tank, a waste liquid conveying mechanism, and a waste liquid conveying pipe; The waste liquid delivery pipe connects to the waste liquid storage tank and the pH detection chamber. The waste liquid in the pH detection chamber enters the waste liquid storage tank through the waste liquid delivery mechanism on the waste liquid delivery pipe.

7. An industrial fluid pH online control device as described in any one of claims 1-6, characterized in that: The pH detection device is electrically connected to the pH adjustment agent dispensing unit; When the result detected by the pH detection device exceeds the threshold, an electrical signal is sent to the pH adjustment agent dispensing unit. The pH adjustment agent dispensing unit is activated by an electrical signal sent by the pH detection device, and then dispenses the pH adjustment agent into the fluid tank.

8. An online control device for the acidity and alkalinity of industrial fluids as described in any one of claims 1-6, characterized in that: It also includes a signal control unit; The signal control unit includes a comparator; The pH detection device, pH adjuster dispensing unit, and signal control unit are electrically connected; The pH detection device transmits an electrical signal of the detection result to the signal control unit; The comparator receives and compares electrical signals sent by the pH detection device. When the comparison result is greater than the threshold, the signal control unit sends an electrical signal to the pH adjuster dispensing unit; The pH adjuster dispensing unit is activated when it receives an electrical signal from the signal control unit and begins dispensing the pH adjuster.

9. The industrial fluid pH online control device as described in claim 8, characterized in that: The signal control unit is also electrically connected to the cleaning unit and the waste liquid unit, and sends electrical signals to the cleaning unit and the waste liquid unit.

10. The industrial fluid pH online control device as described in claim 1, characterized in that: The pH storage tank is also equipped with a level gauge.

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