Self-purification type water quality on-line monitoring device and on-line monitoring method

Abstract

The invention discloses a self-purification type water quality on-line monitoring device and an on-line monitoring method, the self-purification type water quality on-line monitoring device comprises a main circulation module, a water quality on-line monitoring module, a chemical adding and pollution discharging module and an intelligent control module, and the main circulation module comprises a water supply pipe, a water return pipe and a chemical adding pipe and is used for realizing circular flow of a water body to be monitored. The water quality on-line monitoring module collects water quality data through a water quality circulation groove and transmits the data to the intelligent control module, and waste water is discharged through a water drainage pipe or a water drainage pipe. The chemical adding and pollution discharging module comprises a chemical pump and a chemical tank, and water quality management is achieved by adding chemicals into a chemical adding pipe. The intelligent control module is used as a control unit, comprises a controller and an intelligent window, and is used for sending a water quality monitoring instruction to the water quality online monitoring module, receiving monitored water quality data and controlling the dosing and pollution discharge operation of the dosing and pollution discharge module according to the water quality data so as to realize online monitoring and water quality management of water quality.

Description

Technical Field

[0001] This invention relates to the field of water quality monitoring technology, specifically to a self-cleaning online water quality monitoring device and online monitoring method. Background Technology

[0002] In industries such as chemical engineering, metallurgy, and air conditioning and refrigeration, large equipment often relies on water circulation systems for cooling to ensure stable operation. However, during long-term operation, water circulation systems are prone to problems such as pipe scaling, internal wall corrosion, and microbial growth. Pipe scaling leads to decreased heat transfer efficiency and increased energy consumption; internal wall corrosion reduces material strength, increasing maintenance frequency and costs; and microbial growth can cause pipe blockages and even pose safety and environmental risks, seriously affecting the operational stability of the water circulation system and the service life of the equipment. Therefore, effective monitoring and management of the water quality in circulating water systems is crucial.

[0003] In existing technologies, traditional methods such as manual titration are used to monitor water quality. While these methods are technically mature, they have significant limitations. Due to the low frequency of manual monitoring, it is difficult to capture water quality fluctuations in real time, resulting in a lag in water quality monitoring and management, and an inability to promptly detect and address water quality anomalies. Furthermore, the dosing and wastewater discharge strategies for water systems lack support from analysis and prediction based on historical monitoring data. Relying solely on intermittent manual operation not only fails to guarantee water quality stability but may also further increase equipment operating costs and maintenance burdens due to untimely or excessive dosing or wastewater discharge.

[0004] To effectively address the above problems, there is an urgent need to develop a water quality monitoring device to monitor water quality in real time online and automatically implement water quality management based on accurate monitoring data. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a self-cleaning online water quality monitoring device and method, which integrates water quality monitoring with self-cleaning function, improving the timeliness and accuracy of water quality monitoring, and reducing water quality management costs through intelligent management.

[0006] This invention discloses a self-cleaning online water quality monitoring device, comprising: The main circulation module includes a water supply connector, a water supply pipe, a return water connector, a return water pipe, and a chemical dosing pipe. The water supply connector is used to connect the target circulating water system to the main circulation module, the return water connector is used to discharge the treated liquid back to the target circulating water system, the water supply pipe is connected to the water supply connector, the return water pipe is connected to the return water connector, and the water supply pipe and the return water pipe are connected through the chemical dosing pipe. The online water quality monitoring module includes a water flow channel, a sampling tube, a drain pipe, a drain outlet, and a drain pipe. The first end of the sampling tube is connected to the water supply pipe, and the second end of the sampling tube is connected to the inlet of the water flow channel and the first end of the drain pipe. The outlet of the water flow channel and the second end of the drain pipe are both connected to the first end of the drain pipe. The first end of the drain pipe is connected to the inlet of the water flow channel, and the second end of the drain pipe is connected to the outlet of the water flow channel. The second end of the drain pipe is connected to the drain outlet. The sampling tube is equipped with a sampling valve, the drain pipe is equipped with a drain valve, and the drain pipe is equipped with a mode switching valve. The first interface of the mode switching valve is connected to the second end of the drain pipe and the outlet of the water flow channel, the second interface of the mode switching valve is connected to the return water pipe and the dosing pipe, and the third interface of the mode switching valve is connected to the first end of the drain pipe. The dosing and sewage discharge module includes a first chemical pump, a first chemical tank, a sewage pipe, and a sewage outlet. The sewage pipe is equipped with a sewage valve, and its two ends are connected to a return water pipe and a sewage outlet, respectively. The first port of the first chemical pump is connected to the first chemical tank, and the second port of the first chemical pump is connected to the dosing pipe through a conduit. The dosing pipe is equipped with a chemical valve. The intelligent control module includes a control box with an intelligent window on its surface and a controller inside the control box. The controller is electrically connected to the intelligent window, sampling valve, drain valve, water flow channel, mode switching valve, chemical valve and sewage valve.

[0007] Preferably, a filter, a level gauge, a check valve, a damper, and a first flow meter are sequentially installed on the water supply pipe along the first direction. The filter, level gauge, check valve, damper, and first flow meter are electrically connected to the controller. The first direction is the direction in which water flows from the water supply pipe to the return pipe.

[0008] Preferably, the self-cleaning online water quality monitoring device further includes an equipment support structure, which includes a fixed back plate, a base, fixing bolts, and pipe clamps; The fixed backplate is secured to the base using fixing bolts. Water supply pipes, return water pipes, chemical dosing pipes, sampling pipes, drain pipes, drainage pipes, and sewage pipes are fixed to the fixed back plate using pipe clamps.

[0009] Preferably, the online water quality monitoring module also includes a pressure sensor, which is located at the inlet of the water flow channel and is electrically connected to the controller. A second flow meter is installed on the sampling tube, and the second flow meter is electrically connected to the controller.

[0010] Preferably, the water flow channel includes: a flow housing, a sensor group, and an ultrasonic component; The sensor assembly is fixed inside the flow housing, and the ultrasonic component is fixed at the bottom of the flow housing. Both the sensor assembly and the ultrasonic component are electrically connected to the controller. The sensor assembly includes a pH sensor, a hardness sensor, an alkalinity sensor, and a conductivity sensor. The inlet of the water flow channel is located at the bottom of the flow shell, and the outlet of the water flow channel is located at the top of the flow shell.

[0011] Preferably, the ultrasonic component includes a vibrating housing, an ultrasonic drain valve, an adjustable transducer, a vibrating surface, and an ultrasonic drain port; The vibrating surface is located at the bottom of the vibrating shell, and the adjustable transducer is installed below the vibrating surface. The first end of the ultrasonic drain valve is connected to the vibrating shell, and the second end of the ultrasonic drain valve is connected to the ultrasonic drain port. Both the adjustable transducer and the ultrasonic drain valve are electrically connected to the controller.

[0012] Preferably, the dosing and sewage discharge module further includes a second chemical pump and a second chemical tank; The first port of the second agent pump is connected to the second agent tank, and the second port of the second agent pump is connected to the dosing pipe through a conduit; The first medicine tank is equipped with a first liquid level sensor, and the second medicine tank is equipped with a second liquid level sensor; Both the first and second liquid level sensors are electrically connected to the controller.

[0013] This invention discloses a self-cleaning online water quality monitoring method, applied to the aforementioned self-cleaning online water quality monitoring device. The self-cleaning online water quality monitoring method includes: S1. Obtain user commands based on the intelligent window and select a monitoring mode according to the user commands. The monitoring modes are built-in through program writing and include real-time online monitoring mode and timed online monitoring mode. S21. If the monitoring mode is the real-time online monitoring mode, the intelligent control module is used to control the sampling valve to open and the drain valve to close, and to control the first and second interfaces of the mode switching valve to open, so that the water flow of the target circulating water system flows into the water supply pipe, the sampling pipe and the water quality flow tank in sequence, and flows back to the target circulating water system along the return pipe, and the water quality flow tank flows smoothly. S22. If the monitoring mode is the timed online monitoring mode, the wastewater stored in the water quality circulation tank is first discharged within the preset monitoring time to update the sampled water quality in the water quality circulation tank; then the intelligent control module is used to control the sampling valve to open and the drain valve to close, and to control the first and third interfaces of the mode switching valve to open, so that the water flow of the target circulating water system flows into the water supply pipe, the sampling pipe and the water quality circulation tank in sequence, and flows out along the drain pipe, and the water quality circulation tank is intermittently filled with water within the preset time. S3. Use the online water quality monitoring module to monitor the water sample in the water flow channel, obtain water quality data, and send the water quality data to the intelligent control module; S4. Analyze the water quality data using the intelligent control module, and when the water quality data is abnormal, control the opening of the chemical valve and the first chemical pump so that the chemical in the first chemical tank flows into the dosing pipe to optimize the water quality of the target circulating water system. S5. The optimized water quality data, the monitoring information of the online water quality monitoring module, and the dosage of the first reagent tank are displayed in real time using an intelligent window.

[0014] Preferably, the self-cleaning online water quality monitoring method further includes: using an intelligent control module to control the ultrasonic component to start, so as to clean the sensor group in the water quality flow tank at regular intervals using ultrasonic waves, and turning off the ultrasonic component after cleaning to control the discharge of wastewater in the water quality flow tank; Controlling the discharge of wastewater from the water flow channel includes: The intelligent control module controls the sampling valve to close and the drain valve to open, and controls the first and third interfaces of the mode switching valve to open, so that the wastewater in the water flow tank is discharged sequentially through the drain pipe and the drain pipe.

[0015] Preferably, the self-cleaning online water quality monitoring method further includes: when the water quality data exceeds the preset purification threshold, using an intelligent control module to control the opening of the drain valve, the opening of the reagent valve, the opening of the sampling valve, and the closing of the drain valve, and controlling the opening of the first and second interfaces of the mode switching valve, so that the liquid in the target circulating water system is discharged through the drain pipe. In response to the water quality data being less than or equal to the preset purification threshold, the drain valve is closed using the intelligent control module.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The system deeply integrates online water quality monitoring with self-cleaning functionality. Through a bottom-inlet, top-outlet water flow channel design, combined with high-frequency vibration cleaning from ultrasonic components, it effectively avoids monitoring errors caused by scale and microbial adhesion on the sensor surface. This significantly improves the timeliness and accuracy of water quality data, solving the problems of lag and insufficient data reliability inherent in traditional manual monitoring. Secondly, the intelligent control module achieves fully automated management. Based on multi-dimensional data such as pH, hardness, and conductivity collected by the sensor group, the controller automatically adjusts the operating status of the mode switching valve, chemical pump, and drain valve. This ensures the accuracy of dosing and draining while avoiding the subjectivity and untimeliness of manual operation, greatly reducing the labor costs and equipment maintenance burden of water quality management. Furthermore, the modular design allows for relative independence of each functional unit. The dual-tank configuration of the dosing and draining module supports flexible switching between different chemicals, facilitating installation, commissioning, and subsequent maintenance, and adapting to the diverse needs of circulating water systems in various fields such as chemical and metallurgical industries. Attached Figure Description

[0017] Figure 1 Example diagram of the overall structure of the self-cleaning online water quality monitoring device provided by the present invention; Figure 2 A structural example diagram of the water flow channel provided by the present invention; Figure 3 This is a flowchart illustrating the self-cleaning online water quality monitoring method provided by the present invention.

[0018] Illustrations: 11-Support structure; 111-Fixed back plate; 112-Base; 113-Fixing bolt; 114-Pipe clamp; 12-Water supply connector; 13-Return water connector; 14-Filter; 15-Level gauge; 16-Check valve; 17-Damper; 18-First flow meter; 19-Water supply pipe; 20-Return water pipe; 21-Water flow channel; 211-Flow housing; 212-pH sensor; 2121-Hardness sensor; 2122-Alkalinity sensor; 2123-Conductivity sensor; 213-Ultrasonic component; 2131-Vibrating housing; 2132-Ultrasonic drain valve; 2133-Adjustable transducer Components: 2134 - Vibrating surface; 2135 - Ultrasonic drain outlet; 214 - Inlet; 215 - Outlet; 22 - Sampling valve; 23 - Second flow meter; 24 - Drain valve; 25 - Pressure sensor; 26 - Drain outlet; 27 - Sampling tube; 28 - Drain pipe; 29 - Mode switching valve; 31 - First reagent pump; 311 - Conduit; 32 - Second reagent pump; 33 - First reagent tank; 331 - First liquid level sensor; 34 - Second reagent tank; 341 - Second liquid level sensor; 35 - Reagent valve; 36 - Drain valve; 37 - Dosing pipe; 38 - Drain pipe; 39 - Drain outlet; 41 - Control box; 42 - Intelligent window. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] The present invention will now be described in further detail with reference to the accompanying drawings.

[0021] like Figure 1 As shown, the self-cleaning online water quality monitoring device provided by the present invention includes: a main circulation module, an online water quality monitoring module, a chemical dosing and wastewater discharge module, and an intelligent control module. The intelligent control module includes a controller, which is electrically connected to the main circulation module, the online water quality monitoring module, and the chemical dosing and wastewater discharge module, respectively, and is used to collect water quality information and control the coordinated operation of each module.

[0022] Specifically, the main circulation module includes a water supply connector 12, a water supply pipe 19, a return water connector 13, a return water pipe 20, and a chemical dosing pipe. The water supply connector 12 connects the target circulating water system to the main circulation module, the return water connector 13 discharges the treated liquid back to the target circulating water system, the water supply pipe 19 connects to the water supply connector 12, the return water pipe 20 connects to the return water connector 13, and the water supply pipe 19 and the return water pipe 20 are connected via the chemical dosing pipe.

[0023] In this way, the liquid of the target circulating water system enters the water supply pipe 19 through the water supply connector 12, enters the return water pipe 20 through the dosing pipe 37, and finally returns to the target circulating water system through the return water connector 13, forming a closed loop.

[0024] A filter 14, a level gauge 15, a check valve 16, a damper 17, and a first flow meter 18 are sequentially installed along the water supply pipe 19 in the first direction of water flow from the water supply pipe 19 to the return water pipe 20. The filter 14, level gauge 15, check valve 16, damper 17, and first flow meter 18 are electrically connected to the controller. Among them, the filter 14 can filter impurities in the circulating water, the level gauge 15 monitors the liquid level in the water supply pipe 19 in real time, the check valve 16 prevents water from flowing backward, the damper 17 buffers the water flow impact, and the first flow meter 18 is used to measure the water flow rate in the water supply pipe 19.

[0025] Through its electrical connection with the aforementioned components, the controller can acquire real-time data such as the liquid level and flow rate within the water supply pipe 19, and automatically adjust the opening and closing status of the check valve 16 based on data changes to ensure stable water flow. When the level gauge 15 detects that the liquid level in the water supply pipe 19 is lower than a preset threshold, the controller will trigger an alarm signal and display it on the smart window, reminding staff to promptly check and replenish the water. Meanwhile, the damper 17 effectively reduces the impact of water flow fluctuations on subsequent monitoring modules, further ensuring the accuracy of water quality testing.

[0026] In this embodiment of the invention, the online water quality monitoring module includes a water flow channel 21, a sampling tube 27, a drain pipe 28, a drain outlet 26, and a drain pipe. The first end of the sampling tube 27 is connected to the water supply pipe 19, and the second end of the sampling tube 27 is connected to the inlet 214 of the water flow channel 21 and the first end of the drain pipe, respectively. The outlet 215 of the water flow channel 21 and the second end of the drain pipe are both connected to the first end of the drain pipe 28. The first end of the drain pipe is connected to the inlet 214 of the water flow channel 21, and the second end of the drain pipe is connected to the outlet 215 of the water flow channel 21. The second end of the drain pipe 28 is connected to the drain outlet 26. A sampling valve 22 is provided on the sampling tube 27. A drain valve 24 is provided on the drain pipe, and a mode switching valve 29 is provided on the drain pipe 28. The first interface of the mode switching valve 29 is connected to the second end of the drain pipe and the outlet 215 of the water flow channel 21, respectively. The second interface of the mode switching valve 29 is connected to the return pipe 20 and the dosing pipe, respectively. The third interface of the mode switching valve 29 is connected to the first end of the drain pipe 28.

[0027] Using the above connection method, when sampling valve 22 is opened, circulating water enters the inlet 214 of water flow tank 21 through sampling pipe 27. The intelligent ion sensor installed in water flow tank 21 can monitor the pH value, hardness, alkalinity, and conductivity of the water in real time and transmit the monitoring data to the intelligent control system in real time. Next, the water flows from the outlet 215 of water flow tank 21 into the first interface of mode switching valve 29. When the intelligent control module issues a real-time online water quality monitoring command, the residual water sample in water flow tank 21 must first be completely drained to avoid the accumulation of impurities in water flow tank 21 due to long-term operation, which would affect the detection accuracy. At this time, drain valve 24 is opened first, the third interface of mode switching valve 29 is connected, and the water stored in water flow tank 21 flows into drain pipe 28 and is discharged from the system through drain outlet 26, ensuring that there is no water sample residue. Subsequently, the drain valve 24 is closed, the sampling valve 22 is opened, and the water flows through the drain pipe 28 according to the preset sampling time, and is discharged from the system through the drain outlet 26, realizing timed water quality monitoring and recycling.

[0028] In this embodiment of the invention, the dosing and sewage discharge module includes a first chemical pump 31, a first chemical tank 33, a sewage pipe 38, and a sewage outlet 39. The sewage pipe 38 is equipped with a sewage valve 36, and its two ends are connected to the return water pipe 20 and the sewage outlet 39, respectively. The first port of the first chemical pump 31 is connected to the first chemical tank 33, and the second port of the first chemical pump 31 is connected to the dosing pipe 37 through a conduit 311. The dosing pipe 37 is equipped with a chemical valve 35.

[0029] When the intelligent control system detects that the water quality index is lower than the preset threshold, the controller controls the chemical valve 35 to open and simultaneously starts the first chemical pump 31 to transport the chemical in the first chemical tank 33 to the dosing pipe 37 through the conduit 311. The chemical enters the circulating water system for dosing treatment, thereby realizing the automatic adjustment and optimization of water quality.

[0030] When the intelligent control system detects that the water quality index exceeds the preset range and sewage needs to be discharged, the controller controls the sewage discharge valve 36 to open, and the circulating water is discharged through the sewage discharge pipe 38 and the sewage discharge port 39 to achieve sewage discharge and reduce the concentration of pollutants in the system.

[0031] In this embodiment of the invention, the intelligent control module includes a control box 41, the surface of which is provided with an intelligent window 42, and a controller is provided inside the control box 41. The controller is electrically connected to the intelligent window 42, the sampling valve 22, the drain valve 24, the water flow channel 21, the mode switching valve 29, the reagent valve 35, and the sewage valve 36.

[0032] The intelligent window 42 uses a high-definition touch screen display, which can display real-time monitoring data such as the liquid level and flow rate of the water supply pipe 19, the pH value, hardness, alkalinity, and conductivity in the water flow tank 21, as well as the operating status of each valve and chemical pump. Operators can manually switch the device's operating modes through the intelligent window 42, such as real-time monitoring mode, timed monitoring mode, chemical dosing mode, and sewage discharge mode. They can also set preset thresholds for various parameters. When the monitored data exceeds the threshold, the intelligent window 42 will display an audible and visual alarm, along with the cause of the abnormality and suggested solutions.

[0033] As the core control unit, the controller has data storage and uploading functions. It can automatically store daily monitoring data, dosing records, and sewage discharge records to the local database and upload them to the cloud management platform via 4G / 5G network. Staff can remotely view the device's operation status through a mobile APP or computer, realizing unattended remote monitoring.

[0034] In this embodiment of the invention, a second flow meter 23 is installed on the sampling tube 27, and the second flow meter 23 is electrically connected to the controller. The second flow meter 23 is used to monitor the water flow velocity in the sampling tube 27 in real time and feed the data back to the controller of the intelligent control system.

[0035] In this embodiment of the invention, the dosing and sewage discharge module further includes a second chemical pump 32 and a second chemical tank 34. The first port of the second chemical pump 32 is connected to the second chemical tank 34, and the second port of the second chemical pump 32 is connected to the dosing pipe 37 via a conduit. The first chemical tank 33 and the second chemical tank 34 can store different types of chemicals, such as sodium hydroxide solution for adjusting pH value in the first chemical tank 33 and citric acid solution for descaling in the second chemical tank 34. When the controller detects that the hardness of the circulating water exceeds a preset threshold, it will automatically shut down the first chemical pump 31 and the chemical valve 35 (corresponding to the branch of the first chemical tank 33), open the second chemical pump 32 and the corresponding chemical valve, and inject the citric acid solution into the dosing pipe 37 to achieve rapid switching and dosing of different chemicals.

[0036] In this embodiment of the invention, a first liquid level sensor 331 is provided in the first reagent tank 33, and a second liquid level sensor 341 is provided in the second reagent tank 34; both the first liquid level sensor 331 and the second liquid level sensor 341 are electrically connected to the controller. When the first liquid level sensor 331 detects that the liquid level in the first reagent tank 33 is lower than a preset lower limit, the controller will display a "First reagent tank is low on reagent" prompt on the smart window 42 and notify the staff to replenish the reagent; similarly, the second liquid level sensor 341 can monitor the remaining reagent in the second reagent tank 34 in real time, ensuring the continuity of the dosing process and avoiding interruption of water quality regulation due to reagent depletion.

[0037] In this embodiment of the invention, the self-cleaning online water quality monitoring device further includes an equipment support structure 11, which includes a fixed back plate 111, a base 112, fixing bolts 113, and pipe clamps 114. The fixed back plate 111 is fixed to the base 112 based on the fixing bolts 113. The water supply pipe 19, the return water pipe 20, the dosing pipe 37, the sampling pipe 27, the drain pipe 28, the drainage pipe, and the sewage pipe 38 are fixed to the fixed back plate 111 based on the pipe clamps 114.

[0038] For example, the mounting plate 111 is made of stainless steel with an anti-corrosion treatment, making it suitable for humid industrial environments; the pipe clamp 114 is an adjustable plastic clip, which can flexibly fix pipes of different diameters, preventing the pipes from shifting due to water flow impact. The base 112 has an anti-slip rubber pad on the bottom to enhance the stability of the device on the ground or platform and prevent the device from tipping over and being damaged.

[0039] In this embodiment of the invention, the online water quality monitoring module further includes a pressure sensor 25, which is located at the inlet 214 of the water flow channel 21 and is electrically connected to the controller. The pressure sensor 25 can monitor the water pressure at the inlet 214 of the water flow channel 21 in real time. When the water pressure is lower than a preset value, the controller determines that there may be a pipe blockage or insufficient water supply, and will automatically close the sampling valve 22 and trigger an alarm. When the water pressure is higher than the preset value, the controller will adjust the damping coefficient of the damper 17 to buffer the water flow pressure and protect the sensor in the water flow channel 21 from high pressure damage.

[0040] like Figure 2 As shown, the water flow channel 21 includes a flow housing 211, a sensor assembly, and an ultrasonic component 213. The inlet 214 of the water flow channel 21 is located at the bottom of the flow housing 211, and the outlet 215 is located at the top of the flow housing 211. This ensures that the water flow channel 21 forms a top-to-bottom flow direction when discharging water. The sensor assembly is fixed inside the flow housing 211 and is used to monitor the water quality data within the flow housing 211. The ultrasonic component 213 is fixed at the bottom of the flow housing 211 and is used to ultrasonically clean the surface of the sensor assembly to prevent dirt adhesion from affecting detection accuracy. Both the sensor assembly and the ultrasonic component 213 are electrically connected to the controller.

[0041] Specifically, the sensor group includes a pH sensor 212, a hardness sensor 2121, an alkalinity sensor 2122, and a conductivity sensor 2123. The pH sensor 212 monitors the acidity and alkalinity of the water in real time. The hardness sensor 2121, based on the principle of complexometric titration, identifies the concentration of calcium and magnesium ions in the water through a built-in ion-selective electrode, and can quickly output a hardness value expressed as calcium carbonate. The alkalinity sensor 2122 utilizes acid-base neutralization reactions to capture changes in the content of bicarbonate and carbonate ions in the water in real time. The conductivity sensor 2123 indirectly reflects the total concentration of dissolved ions in the water by measuring its electrical conductivity.

[0042] For example, the sensor adopts a modular installation method, which can be disassembled and replaced individually, facilitating daily maintenance and calibration. The probe surface of the sensor is covered with a nano-antifouling coating to reduce the adhesion of scale and microorganisms.

[0043] The ultrasonic component 213 includes a vibrating housing 2131, an ultrasonic drain valve 2132, an adjustable transducer 2133, a vibrating surface 2134, and an ultrasonic drain port 2135. The vibrating surface 2134 is located at the bottom of the vibrating housing 2131, the adjustable transducer 2133 is installed below the vibrating surface 2134, the first end of the ultrasonic drain valve 2132 is connected to the vibrating housing 2131, the second end of the ultrasonic drain valve 2132 is connected to the ultrasonic drain port 2135, and both the adjustable transducer 2133 and the ultrasonic drain valve 2132 are electrically connected to the controller.

[0044] When the controller detects that the sensor's response time exceeds a preset value, it determines that there may be contamination on the sensor surface and automatically initiates an ultrasonic cleaning program: It closes all interfaces of sampling valve 22 and mode switching valve 29, opens ultrasonic drain valve 2132, and the adjustable transducer 2133 emits high-frequency ultrasonic waves, which are transmitted to the water sample in the flow housing 211 through the vibrating surface 2134. The cavitation effect is used to remove contaminants from the sensor surface, and the contaminants are discharged with the water flow through the ultrasonic drain port 2135. After cleaning, the controller opens the second interface of sampling valve 22 and mode switching valve 29, allowing fresh water samples to enter the water flow tank 21, completing the self-cleaning process.

[0045] The water quality monitoring device provided by this invention issues monitoring commands through an intelligent control system, thereby realizing real-time online monitoring or timed online monitoring of water quality.

[0046] like Figure 3 As shown, this embodiment of the invention provides a self-cleaning online water quality monitoring method, applied in the aforementioned self-cleaning online water quality monitoring device. The method includes the following steps: S1. Obtain user commands based on the intelligent window and select the monitoring mode according to the user commands.

[0047] In this embodiment of the invention, the monitoring mode is built-in through program programming, including a real-time online monitoring mode and a timed online monitoring mode. The real-time online monitoring mode means that the self-cleaning water quality online monitoring device keeps running continuously. The timed online monitoring mode means that the self-cleaning water quality online monitoring device performs water quality monitoring based on a preset monitoring time (such as monitoring once every 1 hour or every 4 hours). During non-monitoring periods, the device automatically switches to a low-power standby state, shutting down some sensors and valves that are not necessary to operate, and only retaining the basic power supply of the core control module.

[0048] S21. If the monitoring mode is real-time online monitoring mode, the intelligent control module controls the sampling valve to open and the drain valve to close, and controls the first and second interfaces of the mode switching valve to open, so that the water flow of the target circulating water system flows into the water supply pipe, the sampling pipe and the water quality flow tank in sequence, and flows back to the target circulating water system along the return water pipe, and the water quality flow tank flows smoothly.

[0049] S22. If the monitoring mode is the timed online monitoring mode, the wastewater stored in the water quality circulation tank will be discharged first within the preset monitoring time to update the sampled water quality in the water quality circulation tank; then the intelligent control module will be used to control the sampling valve to open and the drain valve to close, and control the first and third interfaces of the mode switching valve to open, so that the water flow of the target circulating water system flows into the water supply pipe, the sampling pipe and the water quality circulation tank in sequence, and flows out along the drain pipe. The water quality circulation tank will have intermittent water flow within the preset time.

[0050] S3. Use the online water quality monitoring module to monitor the water quality of the water sample in the water flow channel, obtain water quality data, and send the water quality data to the intelligent control module.

[0051] S4. Utilize the intelligent control module to analyze water quality data, and in the event of abnormal water quality data, control the opening of the chemical valve and the first chemical pump to allow the chemical in the first chemical tank to flow into the dosing pipe, thereby optimizing the water quality of the target circulating water system.

[0052] S5. Utilize an intelligent window to display in real time the optimized water quality data, the monitoring information from the online water quality monitoring module, and the dosage of the first reagent tank.

[0053] In this embodiment of the invention, an intelligent control module is used to activate the ultrasonic component to periodically clean the sensor array within the water flow channel using ultrasonic waves. After cleaning, the ultrasonic component is deactivated, and wastewater is discharged from the water flow channel. Specifically, the process of controlling the discharge of wastewater from the water flow channel includes using the intelligent control module to close the sampling valve, open the drain valve, and open the first and third interfaces of the mode switching valve, so that the wastewater in the water flow channel is discharged sequentially through the drain pipe and the discharge pipe.

[0054] In this embodiment of the invention, when the water quality data exceeds the preset purification threshold, the intelligent control module controls the opening of the drain valve, the opening of the reagent valve, the opening of the sampling valve, and the closing of the drain valve, and controls the opening of the first and second interfaces of the mode switching valve so that the liquid in the target circulating water system is discharged through the drain pipe; in response to the water quality data being less than or equal to the preset purification threshold, the intelligent control module controls the drain valve to close.

[0055] The monitoring methods of the two monitoring modes of the present invention will be described in detail below through specific embodiments.

[0056] When the monitoring mode is real-time online monitoring, the water quality online monitoring module and the chemical dosing and wastewater discharge module operate synchronously. Water from the target circulating water system enters the supply pipe section through the supply connector. At this time, the sampling valve opens, the drain valve closes, and the water flows from the sampling pipe, sampling valve, and flow meter into the water quality flow channel. It then flows back to the target circulating water system through the mode switching valve along the return pipe section, forming a continuous sampling loop. This ensures that the sensors in the water quality flow channel can capture water quality changes in real time. In this mode, the sampling loop of the water quality online monitoring module is always unobstructed, and circulating water always flows through the water quality flow channel, meeting the real-time monitoring requirements. The sensors transmit the collected water quality data to the intelligent control system for analysis and processing in real time, and the chemical dosing and wastewater discharge module uses the water quality data for water quality management and treatment.

[0057] Specifically, when the pH sensor in the online water quality monitoring module detects a low pH value, the intelligent control system uses the controller to issue a command to start the chemical pump, which draws alkaline regulator from the chemical tank and delivers it through a conduit to the dosing pipe. The alkaline regulator then enters the system with the circulating water, adjusting the water pH value to the set range. Once the pH value returns to the normal range, the controller automatically stops the chemical pump to prevent over-dosing.

[0058] For example, if the pH value remains low, the system will initiate a sewage discharge procedure, opening the drain valve to discharge some of the circulating water until the water quality returns to the set range, at which point the drain valve will close and sewage discharge will cease. Throughout the process, the intelligent control system monitors water quality changes in real time and dynamically adjusts the dosage and discharge duration according to a preset algorithm to ensure that the water quality remains stable within the ideal range.

[0059] When the monitoring mode is set to timed online monitoring, the monitoring program starts at preset time intervals. At this time, the sampling valve is closed, the drain valve is open, and the old water remaining in the water flow channel flows through the drain pipe and the third interface of the mode switching valve into the drain pipe, and is discharged from the drain outlet. After the old water is drained, the drain valve closes, the sampling valve opens, and fresh water samples flow through the sampling pipe into the water flow channel and are discharged through the drain pipe via the third interface of the mode switching valve. In this mode, the sampling loop of the online water quality monitoring module starts and stops at preset monitoring times, and the water samples in the water flow channel are periodically replaced, fulfilling the function of timed online water quality monitoring. In this mode, the water samples in the water flow channel are replaced at the beginning of each monitoring cycle, ensuring the representativeness and accuracy of the collected data and avoiding measurement deviations caused by water sample retention. After acquiring the water quality monitoring data, the intelligent control system uses the chemical dosing and sewage discharge module for water quality management. The process of using the chemical dosing and sewage discharge module for water quality management is as described above and will not be repeated here.

[0060] As can be seen from the above technical solution, this invention discloses a self-cleaning online water quality monitoring device and method. This self-cleaning online water quality monitoring device deeply integrates online water quality monitoring with self-cleaning functionality. Through a structure design where water enters from the bottom and exits from the top of the water flow channel, combined with high-frequency vibration cleaning by ultrasonic components, it effectively avoids monitoring errors caused by scale and microbial adhesion on the sensor surface, significantly improving the timeliness and accuracy of water quality data and solving the problems of lag and insufficient data reliability in traditional manual monitoring. Secondly, the intelligent control module achieves fully automated management of the entire process. Based on multi-dimensional data such as pH value, hardness, and conductivity collected by the sensor group, the controller automatically adjusts the operating status of the mode switching valve, chemical pump, and drain valve. This ensures the accuracy of chemical dosing and draining while avoiding the subjectivity and untimeliness of manual operation, significantly reducing the labor costs and equipment maintenance burden of water quality management. Furthermore, the modular structural design makes each functional unit relatively independent, and the dual-tank configuration of the dosing and sewage discharge module supports flexible switching of different reagents, which not only facilitates the installation, commissioning and subsequent maintenance of the device, but also adapts to the differentiated needs of circulating water systems in multiple fields such as chemical and metallurgical industries.

[0061] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A self-cleaning online water quality monitoring device, characterized in that, include: The main circulation module includes a water supply connector (12), a water supply pipe (19), a return water connector (13), a return water pipe (20), and a chemical dosing pipe (37). The water supply connector (12) is used to connect the target circulating water system to the main circulation module. The return water connector (13) is used to discharge the treated liquid back to the target circulating water system. The water supply pipe (19) is connected to the water supply connector (12). The return water pipe (20) is connected to the return water connector (13). The water supply pipe (19) and the return water pipe (20) are connected based on the chemical dosing pipe (37). The online water quality monitoring module includes a water flow channel (21), a sampling tube (27), a drain pipe (28), a drain outlet (26), and a drain pipe. The first end of the sampling tube (27) is connected to the water supply pipe (19). The second end of the sampling tube is connected to the inlet (214) of the water flow channel (21) and the first end of the drain pipe, respectively. The outlet (215) of the water flow channel (21) and the second end of the drain pipe are both connected to the first end of the drain pipe (28). The first end of the drain pipe is connected to the inlet (214) of the water flow channel (21), and the second end of the drain pipe is connected to the water flow channel (28). 1) is connected to the outlet (215), the second end of the drain pipe (28) is connected to the drain outlet (26), the sampling pipe (27) is provided with a sampling valve (22), the drain pipe is provided with a drain valve (24), the drain pipe (28) is provided with a mode switching valve (29), the first interface of the mode switching valve (29) is connected to the second end of the drain pipe and the outlet (215) of the water quality circulation channel (21) respectively, the second interface of the mode switching valve (29) is connected to the return water pipe (20) and the dosing pipe (37) respectively, and the third interface of the mode switching valve (29) is connected to the first end of the drain pipe (28); The dosing and sewage discharge module includes a first chemical pump (31), a first chemical tank (33), a sewage pipe (38), and a sewage outlet (39). The sewage pipe (38) is equipped with a sewage valve (36). Both ends of the sewage pipe (38) are connected to the return water pipe (20) and the sewage outlet (39) respectively. The first port of the first chemical pump (31) is connected to the first chemical tank (33). The second port of the first chemical pump (31) is connected to the dosing pipe (37) through a conduit (311). The dosing pipe (37) is equipped with a chemical valve (35). The intelligent control module includes a control box (41), the surface of which is provided with an intelligent window (42), and a controller is provided inside the control box (41). The controller is electrically connected to the intelligent window (42), the sampling valve (22), the drain valve (24), the water flow channel (21), the mode switching valve (29), the reagent valve (35), and the sewage valve (36).

2. The self-cleaning online water quality monitoring device according to claim 1, characterized in that, A filter (14), a level gauge (15), a check valve (16), a damper (17), and a first flow meter (18) are sequentially installed on the water supply pipe (19) along the first direction. The filter (14), the level gauge (15), the check valve (16), the damper (17), and the first flow meter (18) are electrically connected to the controller. The first direction is the direction in which water flows from the water supply pipe (19) to the return water pipe (20).

3. The self-cleaning online water quality monitoring device according to claim 1, characterized in that, It also includes an equipment support structure (11), which includes a fixed back plate (111), a base (112), fixing bolts (113) and pipe clamps (114); The fixed back plate (111) is fixed to the base (112) based on the fixed bolts (113); The water supply pipe (19), the return water pipe (20), the dosing pipe (37), the sampling pipe (27), the drain pipe (28), the drainage pipe and the sewage pipe (38) are fixed to the fixed back plate (111) based on the pipe clamp (114).

4. The self-cleaning online water quality monitoring device according to claim 1, characterized in that, The online water quality monitoring module also includes a pressure sensor (25), which is located at the inlet (214) of the water flow channel (21) and is electrically connected to the controller. A second flow meter (23) is installed on the sampling tube (27), and the second flow meter (23) is electrically connected to the controller.

5. The self-cleaning online water quality monitoring device according to claim 1, characterized in that, The water flow channel (21) includes: a flow shell (211), a sensor group and an ultrasonic component (213); The sensor group is fixed inside the flow housing (211), and the ultrasonic component (213) is fixed at the bottom of the flow housing (211). Both the sensor group and the ultrasonic component (213) are electrically connected to the controller. The sensor group includes a pH sensor (212), a hardness sensor (2121), an alkalinity sensor (2122), and a conductivity sensor (2123). The inlet (214) of the water flow channel (21) is located at the bottom of the flow housing (211), and the outlet (215) of the water flow channel (21) is located at the top of the flow housing (211).

6. The self-cleaning online water quality monitoring device according to claim 5, characterized in that, The ultrasonic component (213) includes a vibrating housing (2131), an ultrasonic drain valve (2132), an adjustable transducer (2133), a vibrating surface (2134), and an ultrasonic drain port (2135); The vibration surface (2134) is located at the bottom of the vibration shell (2131), the adjustable transducer (2133) is installed below the vibration surface (2134), the first end of the ultrasonic drain valve (2132) is connected to the vibration shell (2131), the second end of the ultrasonic drain valve (2132) is connected to the ultrasonic drain port (2135), and both the adjustable transducer (2133) and the ultrasonic drain valve (2132) are electrically connected to the controller.

7. The self-cleaning online water quality monitoring device according to claim 1, characterized in that, The dosing and sewage discharge module also includes a second chemical pump (32) and a second chemical tank (34); The first port of the second agent pump (32) is connected to the second agent tank (34), and the second port of the second agent pump (32) is connected to the dosing pipe (37) through the conduit (311); The first medicine tank (33) is equipped with a first liquid level sensor (331), and the second medicine tank (34) is equipped with a second liquid level sensor (341). Both the first liquid level sensor (331) and the second liquid level sensor (341) are electrically connected to the controller.

8. A self-cleaning online water quality monitoring method, applied to the self-cleaning online water quality monitoring device as described in any one of claims 1-7, characterized in that, include: S1. Obtain user commands based on the intelligent window and select a monitoring mode according to the user commands. The monitoring modes are built-in through program writing and include real-time online monitoring mode and timed online monitoring mode. S21. If the monitoring mode is the real-time online monitoring mode, the intelligent control module is used to control the sampling valve to open and the drain valve to close, and to control the first and second interfaces of the mode switching valve to open, so that the water flow of the target circulating water system flows into the water supply pipe, the sampling pipe and the water quality flow tank in sequence, and flows back to the target circulating water system along the return pipe, and the water quality flow tank flows smoothly. S22. If the monitoring mode is the timed online monitoring mode, the wastewater stored in the water quality circulation tank is first discharged within the preset monitoring time to update the sampled water quality in the water quality circulation tank; then the intelligent control module is used to control the sampling valve to open and the drain valve to close, and to control the first and third interfaces of the mode switching valve to open, so that the water flow of the target circulating water system flows into the water supply pipe, the sampling pipe and the water quality circulation tank in sequence, and flows out along the drain pipe. The water quality circulation tank is intermittently filled with water within the preset time. S3. Use the online water quality monitoring module to monitor the water sample in the water flow channel, obtain water quality data, and send the water quality data to the intelligent control module; S4. Analyze the water quality data using the intelligent control module, and when the water quality data is abnormal, control the opening of the chemical valve and the first chemical pump so that the chemical in the first chemical tank flows into the dosing pipe to optimize the water quality of the target circulating water system. S5. The optimized water quality data, the monitoring information of the online water quality monitoring module, and the dosage of the first reagent tank are displayed in real time using an intelligent window.

9. The self-cleaning online water quality monitoring method according to claim 8, characterized in that, Also includes: The ultrasonic component is activated by an intelligent control module to clean the sensor group in the water flow tank at regular intervals using ultrasonic waves. After cleaning is completed, the ultrasonic component is turned off to control the discharge of wastewater from the water flow tank. Controlling the discharge of wastewater from the water flow channel includes: The intelligent control module controls the sampling valve to close and the drain valve to open, and controls the first and third interfaces of the mode switching valve to open, so that the wastewater in the water flow tank is discharged sequentially through the drain pipe and the drain pipe.

10. The self-cleaning online water quality monitoring method according to claim 8, characterized in that, Also includes: When the water quality data exceeds the preset purification threshold, the intelligent control module controls the opening of the drain valve, the opening of the reagent valve, the opening of the sampling valve, and the closing of the drain valve, and controls the opening of the first and second interfaces of the mode switching valve so that the liquid in the target circulating water system is discharged through the drain pipe. In response to the water quality data being less than or equal to the preset purification threshold, the drain valve is closed using the intelligent control module.

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