Equipment for monitoring water quality of treated sewage

Abstract

The invention relates to the technical field of monitoring, and discloses equipment for monitoring the quality of treated sewage, the equipment comprises a water flow channel and a controller, the water flow channel is provided with a first solenoid valve, the equipment also comprises a comparator module and a water flow sensor extending into a water body to be detected, the water flow sensor and the comparator module are electrically connected with the controller, and the controller is electrically connected with the comparator module. The water flow sensor is used for detecting the flow velocity of a to-be-detected water body, and the comparator module compares the flow velocity detected by the water flow sensor with a preset threshold value, judges the actual flow velocity of the to-be-detected water body, and is used as a reference for automatically setting a first set value and a second set value for the controller; and when the opening duration time of the first electromagnetic valve reaches a first set value. The invention has the following advantages and effects: it is ensured that the equipment performs water quality detection at appropriate time intervals under different flow velocity conditions, the adaptability of the equipment to different water quality environments is improved, fine changes of water quality parameters can be caught acutely, and the real-time performance and accuracy of monitoring are improved.

Description

Technical Field

[0001] This invention relates to the field of monitoring technology, and in particular to a device for monitoring the water quality of treated wastewater. Background Technology

[0002] In wastewater treatment effectiveness assessment and monitoring, testing the treated wastewater is a crucial step. Because treated wastewater exhibits dynamic flow characteristics, it is not static but continuously flows through pipes, rivers, and other environments. This flow makes the distribution of substances in the water more complex, and pollutant concentrations dynamically change with factors such as water flow speed, direction, and the surrounding environment. Furthermore, after effective treatment, the water quality is significantly improved, and the pollutant content in the tested water is relatively low and the concentration is relatively weak. Therefore, to obtain more accurate and reliable testing data that comprehensively and accurately reflects the water quality after treatment, higher-precision testing methods must be employed to ensure that the test results provide a solid basis for subsequent water quality assessment, environmental management, and optimization of wastewater treatment processes.

[0003] Traditional detection methods mostly involve periodic sampling and monitoring or direct real-time monitoring of dynamic water quality using sensors, achieving both static and dynamic sampling and detection. However, in highly mobile water bodies and in scenarios involving low-concentration pollutants, the flow rate and detection frequency of the water body being tested are crucial. If the flow rate of the water body being tested is high and the detection frequency is low, the sensor cannot accurately capture subtle changes in pollutant content, making it difficult to accurately reflect the treatment effect of wastewater quality. This results in low accuracy and reliability of the detection, which in turn leads to a lag in the adjustment of treatment measures and affects the overall wastewater treatment outcome. Therefore, a device for monitoring the water quality of treated wastewater is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a device for monitoring the water quality of treated wastewater, which can perform water quality detection at appropriate time intervals under different flow rate conditions, and can keenly capture subtle changes in water quality parameters, thereby improving the real-time performance and accuracy of monitoring.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a device for monitoring the water quality of treated wastewater, comprising a water flow channel and a controller, wherein a first solenoid valve is provided on the water flow channel, and a comparator module and a water flow sensor extending into the water body to be tested are also included. The water flow sensor and the comparator module are electrically connected to the controller. The water flow sensor is used to detect the flow velocity of the water body to be tested. The comparator module compares the flow velocity detected by the water flow sensor with its preset threshold to determine the actual flow velocity of the water body to be tested, which is used as a reference for the controller to automatically set a first set value and a second set value. When the opening duration of the first solenoid valve reaches the first set value, the controller controls the first solenoid valve to close; when the closing duration of the first solenoid valve reaches the second set value, the controller controls the first solenoid valve to open.

[0006] By employing the above technical solution, a water flow sensor extending into the water body under test monitors the water flow velocity in real time. The water flow sensor transmits the detected velocity signal to a comparator module, which has a preset velocity threshold (e.g., 1 m / s). The comparator module compares the actual detected velocity with the preset threshold to determine the current water flow velocity. Based on the comparator module's judgment, the controller sets a first setpoint of 30 seconds and a second setpoint of 20 seconds if the actual velocity is greater than 1 m / s, and sets a first setpoint of 60 seconds and a second setpoint of 40 seconds if the actual velocity is less than 1 m / s. The first setpoint is the threshold for the opening duration of the first solenoid valve. When the opening duration of the first solenoid valve reaches this value, the controller controls the first solenoid valve to close, blocking the main channel water flow and creating conditions for water quality testing. The second set value is a threshold for the duration of the first solenoid valve's closure. When the duration of the first solenoid valve's closure reaches this value, the controller controls the first solenoid valve to open, and the water flow mainly passes through the main channel. In this way, the switching frequency of the first solenoid valve can be adjusted according to different flow rates, thereby adjusting the frequency of water quality detection. When the flow rate is fast, the controller shortens the first and second set values ​​to increase the detection frequency; when the flow rate is slow, these two set values ​​are extended to reduce the detection frequency. In summary, this device, through a water flow sensor and comparator module, enables the controller to set appropriate first and second set values ​​according to different flow rates, ensuring that the equipment performs water quality detection at appropriate time intervals under different flow rate conditions. This improves the equipment's adaptability to different water quality environments, allows it to sensitively capture subtle changes in water quality parameters, and enhances the real-time performance and accuracy of monitoring.

[0007] A further configuration of the present invention is as follows: the water flow channel includes a main channel and a secondary channel; a first solenoid valve is disposed on the main channel; both ends of the secondary channel are disposed on the main channel and connected to the main channel; the first solenoid valve is located between the two ends of the secondary channel; a one-way valve is also disposed on the main channel; the first solenoid valve and the one-way valve are arranged sequentially from the inlet end to the outlet end of the main channel; the flow direction of the one-way valve is the same as the water flow direction; one end of the secondary channel is located between the first solenoid valve and the inlet end; and the other end of the secondary channel is located between the first one-way valve and the outlet end.

[0008] By adopting the above technical solution, the one-way valve can prevent water backflow, ensure that the water flows in the set direction, avoid the impact of reverse water flow on the equipment, ensure the correctness of the water flow direction in the secondary channel and the main channel under different working conditions, and further improve the stability and reliability of equipment operation.

[0009] A further provision of the present invention is that a second solenoid valve is provided on the secondary channel, the second solenoid valve being electrically connected to the controller. When the opening duration of the first solenoid valve reaches a first set value, the controller controls the second solenoid valve to open, thereby opening the secondary channel and allowing the water sample to flow through the secondary channel. When the closing duration of the first solenoid valve reaches a second set value, the controller controls the second solenoid valve to close, thereby closing the secondary channel and allowing the water sample to pass through the main channel.

[0010] By adopting the above technical solution and setting a second solenoid valve, precise control of the secondary channel's opening and closing can be achieved. After the first solenoid valve is open for a certain period, the secondary channel opens, allowing the water sample to flow through it. This avoids the impact of prolonged water sample flow in the main channel on the testing environment and prepares a stable water sample environment for the next test. When the first solenoid valve is closed for a certain period, the secondary channel closes, allowing the water sample to pass through the main channel for testing. This coordinated control method further optimizes the equipment's water quality testing process and improves the accuracy and reliability of the testing.

[0011] A further setting of the present invention is that the first set value of the controller is in the range of 30-120 seconds, and the second set value is in the range of 20-60 seconds.

[0012] By adopting the above technical solution, the reasonable range of the first and second set values ​​is clarified, providing a reference for the controller to set specific time values ​​according to the flow rate. This enables the equipment to adjust the detection frequency more scientifically and reasonably under different flow rate conditions, avoiding untimely or excessively frequent detection due to excessively large or small set values. While ensuring the real-time performance and accuracy of monitoring, the equipment operating efficiency is improved and energy consumption is reduced.

[0013] A further feature of the present invention is that the response time of the first solenoid valve and the second solenoid valve is 0.1 seconds to 0.5 seconds, and the opening pressure of the check valve is 0.1 MPa to 0.3 MPa.

[0014] By adopting the above technical solution and setting these parameters, the flow state of the water sample in the channel can be precisely controlled. Appropriate response time and opening pressure can ensure stable flow of the water sample in the channel, avoid abnormal water sample flow caused by slow response of the first and second solenoid valves or inappropriate opening pressure of the check valve, and ensure the accuracy of the test data.

[0015] A further feature of the present invention is that the water flow sensor is a Doppler flow velocity sensor with a measurement accuracy of ±0.05 m / s, a water depth range of 0.02-5 meters, and a flow velocity range of 0.02-10 m / s.

[0016] By adopting the above technical solution, the water flow sensor was identified as a Doppler flow velocity and flow sensor, and its measurement accuracy, water depth range, and flow velocity range were given, which ensures that the equipment can accurately obtain flow velocity information.

[0017] A further feature of the present invention is that the response time of the first solenoid valve and the second solenoid valve is 0.1 seconds to 0.5 seconds, and the opening pressure of the one-way valve 205 is 0.1 MPa to 0.3 MPa.

[0018] By adopting the above technical solution, the water flow sensor was identified as a Doppler flow velocity and flow sensor, and its measurement accuracy, water depth range, and flow velocity range were given, which ensures that the equipment can accurately obtain flow velocity information.

[0019] A further feature of the present invention is that the water intake mechanism includes a water intake pump detachably connected to the water inlet end of the main channel, the water inlet end of the water intake pump is fixedly connected to a water intake pipe, and the water inlet end of the water intake pipe extends to the water body to be tested.

[0020] By adopting the above technical solution, when the water pump is working, it draws water from the water body to be tested into the main channel through the water intake pipe, providing a stable supply of water samples for the entire monitoring process, ensuring a stable supply of water samples to be tested, and improving the accuracy of monitoring.

[0021] A further feature of the present invention is that a ground-inserting rod is fixedly connected to the upper part of the water intake pipe to maintain the stability of the water intake pipe, and a float plate is fixedly connected to the water inlet end of the water intake pipe to support the water intake pipe.

[0022] By adopting the above technical solution, the floating plate combined with the ground-inserting rods fixes the water intake pipe from both the shore and the water surface, effectively preventing the water intake pipe from shaking due to water flow impact or external factors, further ensuring the stability and continuity of water intake, and guaranteeing a stable supply of water samples for the entire monitoring process.

[0023] The beneficial effects of this invention are: 1. This device, through a water flow sensor and comparator module, can sense changes in water flow velocity in real time and flexibly adjust the detection frequency according to the flow velocity. It can perform detection at appropriate time intervals (first set value and second set value). Detection at appropriate time intervals can avoid data interference caused by too frequent detection (e.g., when the flow velocity is slow, multiple detections in a short period of time may yield similar data due to little change in the water sample, wasting resources and potentially masking the true changes). It can also avoid failing to accurately capture water quality change trends due to excessively long detection intervals (e.g., when the flow velocity is fast, not detecting for a long time may lead to missing sudden changes in water quality). Through this dynamic adjustment method, the accuracy and reliability of water quality monitoring data are improved.

[0024] 2. An appropriate water quality testing frequency helps to obtain water quality parameter information more accurately. When the flow rate changes, timely adjustment of the testing frequency can enable the equipment to conduct more intensive sampling and testing of the water body under different flow rate conditions. Dynamically adjusting the testing frequency according to the flow rate ensures that the equipment can reflect the latest water quality status in a timely manner and will not miss the critical moment of water quality change due to a fixed testing cycle, so that the monitoring results can reflect the actual water quality situation more in real time. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the water flow channel structure of the present invention; Figure 3 This is a schematic diagram of the data processing module of the present invention; Figure 4 This is a cross-sectional view of the detection box of the present invention; Figure 5 This is a schematic diagram of the control principle of the present invention.

[0027] In the diagram, 1. Detection box; 101. Inlet; 102. Outlet; 2. Water flow channel; 201. Support frame; 202. Secondary channel; 203. Main channel; 204. First solenoid valve; 205. Check valve; 3. Power module; 4. Data processing module; 401. Microprocessor; 402. Circuit board; 403. Memory; 404. Data output module; 5. Controller; 6. Comparator module; 7. Solar photovoltaic panel; 8. Water intake mechanism; 801. Water pump; 802. Water intake pipe; 9. Second solenoid valve; 10. Float; 11. Counterweight; 12. Water flow sensor; 13. Grounding rod; 14. Return water hose; 15. Multi-parameter sensor. Detailed Implementation

[0028] The technical solution of the present invention will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0029] Reference Figure 1-5 A device for monitoring the water quality of treated wastewater includes a water flow channel 2 and a controller 5. The controller 5 is a PLC controller, model OHR-PR10. A first solenoid valve 204 is installed on the water flow channel 2. The device also includes a comparator module 6 and a water flow sensor 12 extending into the water body to be tested. The comparator module 6 is model LZ-LM393. The water flow sensor 12 and the comparator module 6 are electrically connected to the controller 5. The water flow sensor 12 is used to detect the flow velocity of the water body to be tested. The comparator module 6 compares the flow velocity detected by the water flow sensor 12 with its preset threshold to determine the actual flow velocity of the water body to be tested. This is used as a reference for the controller 5 to automatically set a first set value and a second set value. When the opening duration of the first solenoid valve 204 reaches the first set value, the controller 5 controls the first solenoid valve 204 to close; when the closing duration of the first solenoid valve 204 reaches the second set value, the controller 5 controls the first solenoid valve 204 to open.

[0030] By adopting the above technical solution, a water flow sensor 12 extending into the water body to be tested monitors the water flow velocity in real time. The water flow sensor 12 transmits the detected flow velocity signal to a comparator module 6. The comparator module 6 has a preset flow velocity threshold, such as 1 m / s. The comparator module 6 compares and analyzes the actual detected flow velocity with the preset threshold to determine the current water flow velocity. Based on the judgment result of the comparator module, the controller 5 sets a first set value of 30s and a second set value of 20s if the actual flow velocity is greater than 1 m / s, and sets a first set value of 60s and a second set value of 40s if the actual flow velocity is less than 1 m / s. The first set value is the threshold for the opening duration of the first solenoid valve 204. When the opening duration of the first solenoid valve 204 reaches this value, the controller 5 controls the first solenoid valve 204 to close, blocking the water flow in the main channel 203, thus creating conditions for water quality detection. The device creates conditions; the second set value is the threshold value for the closing duration of the first solenoid valve 204. When the closing duration of the first solenoid valve 204 reaches this value, the controller 5 controls the first solenoid valve 204 to open, and the water flow mainly passes through the main channel. In this way, the switching frequency of the first solenoid valve 204 is adjusted according to different flow rates, thereby adjusting the frequency of water quality detection. When the flow rate is faster, the controller shortens the first and second set values ​​to increase the detection frequency; when the flow rate is slower, these two set values ​​are extended to reduce the detection frequency. In summary, this device, through the water flow sensor and comparator module, enables the controller to set appropriate first and second set values ​​according to different flow rates, ensuring that the equipment performs water quality detection at appropriate time intervals under different flow rate conditions. This improves the adaptability of the equipment to different water quality environments, can keenly capture subtle changes in water quality parameters, and enhances the real-time performance and accuracy of monitoring.

[0031] The water flow channel 2 includes a main channel 203 and a secondary channel 202. A first solenoid valve 204 is installed on the main channel 203. Both ends of the secondary channel 202 are installed on the main channel 203 and connected to the main channel 203. The first solenoid valve 204 is located between the two ends of the secondary channel 202. A one-way valve 205 is also installed on the main channel 203. The first solenoid valve 204 and the one-way valve 205 are installed sequentially from the inlet end to the outlet end of the main channel 203. The flow direction of the one-way valve 205 is the same as the water flow direction. One end of the secondary channel 202 is located between the first solenoid valve 204 and the inlet end, and the other end of the secondary channel 202 is located between the first one-way valve 205 and the outlet end. The one-way valve 205 can prevent backflow of water, ensure that the water flows in the set direction, avoid the impact of reverse water flow on the equipment, ensure the correctness of the water flow direction of the secondary channel 202 and the main channel 203 under different working conditions, and further improve the stability and reliability of the equipment operation.

[0032] A second solenoid valve 9 is installed on the secondary channel 202. The second solenoid valve 9 is electrically connected to the controller 5. When the opening duration of the first solenoid valve 204 reaches a first set value of 30 seconds, the controller 5 controls the second solenoid valve 9 to open the secondary channel 202, allowing the water sample to flow through it. When the closing duration of the first solenoid valve 204 reaches a second set value of 20 seconds, the controller 5 controls the second solenoid valve 9 to close the secondary channel 202, allowing the water sample to pass through the main channel 203. By setting the second solenoid valve 9, precise control of the opening and closing of the secondary channel 202 can be achieved. The secondary channel 202 is opened after the first solenoid valve 204 is open for 30 seconds, allowing the water sample to flow through it. The secondary channel 202 is closed after the first solenoid valve 204 is closed for 20 seconds, allowing the water sample to pass through the main channel 203 for testing. This coordinated control method further optimizes the water quality testing process of the equipment and further improves the accuracy and reliability of the testing.

[0033] The controller's first setpoint ranges from 30 to 120 seconds, and the second setpoint ranges from 20 to 60 seconds. This clarifies the reasonable ranges for the first and second setpoints, providing a reference for the controller 5 to set specific time values ​​based on flow rate. This allows the equipment to adjust the detection frequency more scientifically and reasonably under different flow rate conditions, avoiding untimely or excessively frequent detection due to excessively large or small setpoints. While ensuring real-time and accurate monitoring, this also improves equipment operating efficiency and reduces energy consumption.

[0034] The response time of the first solenoid valve 204 and the second solenoid valve 9 is 0.1 to 0.5 seconds, and the opening pressure of the one-way valve 205 is 0.1 MPa to 0.3 MPa. By setting these parameters, the flow state of the water sample in the channel can be precisely controlled. Appropriate response time and opening pressure can ensure stable flow of the water sample in the channel and avoid abnormal water sample flow caused by slow response of the first solenoid valve 204 and the second solenoid valve 9 or inappropriate opening pressure of the one-way valve 205, thus ensuring the accuracy of the detection data.

[0035] The water flow sensor 12 is a Doppler flow velocity and flow sensor with a measurement accuracy of ±0.05 m / s, a water depth range of 0.02-5 meters, and a flow velocity range of 0.02-10 m / s. This clarifies that the water flow sensor is a Doppler flow velocity and flow sensor and provides parameters such as its measurement accuracy, water depth range, and flow velocity range, ensuring that the equipment can accurately obtain flow velocity information.

[0036] The water intake mechanism 8 includes a water intake pump 801 detachably connected to the water inlet end of the main channel 203. The water intake end of the water intake pump 801 is fixedly connected to a water intake pipe 802. The water inlet end of the water intake pipe 802 extends to the water body to be tested. When the water intake pump 801 is working, it draws water from the water body to be tested into the main channel 203 through the water intake pipe 802, providing a stable and continuous supply of water samples for the entire monitoring process, ensuring a stable supply of water samples to be tested, and improving the accuracy of monitoring.

[0037] It also includes a counterweight 11 installed at the water inlet of the water intake pipe 802. The counterweight 11 ensures that the water inlet of the water intake pipe 802 is in contact with the water body to be tested, which increases the stability of water intake and further improves the accuracy of monitoring data.

[0038] A ground-inserting rod 13 is fixedly connected to the upper part of the water intake pipe 802 to maintain the stability of the water intake pipe 802. A float plate 10 is fixedly connected to the water inlet end of the water intake pipe 802 to support the water intake pipe 802. The float plate 10, together with the ground-inserting rod 13, fixes the water intake pipe 802 from both the shore and the water surface, effectively preventing the water intake pipe 802 from shaking due to water flow impact or external factors, further ensuring the stability and continuity of water intake, and ensuring a stable supply of water samples for the entire monitoring process.

[0039] The length of the main channel 203 is 200mm to 500mm, and the length of the secondary channel 202 is 100mm to 200mm. The dimensions of the main channel 203 and the secondary channel 202 are clearly defined to ensure the flow time of the water sample in the main channel 203 and the secondary channel 202 and the accuracy of the detection data. This ensures that the water sample has sufficient flow time in the channel for thorough detection, while avoiding problems such as poor water sample flow or inaccurate detection caused by the channel size being too large or too small, thereby improving the accuracy of the detection data.

[0040] Both the main channel 203 and the auxiliary channel 202 are made of corrosion-resistant materials, namely 304 stainless steel. The first solenoid valve 204, the second solenoid valve 9, and the check valve 205 are all corrosion-resistant valves. The use of corrosion-resistant materials and valves is to resist the influence of corrosive substances that may be present in sewage on the equipment and valves, thus ensuring the accuracy of monitoring.

[0041] It also includes a multi-parameter sensor 15, model OSA-PE5-1, which can detect the pH, EC, TDS and salinity of the water to be tested. The multi-parameter sensor 15 is set in the main channel 203 and located between the first solenoid valve 204 and the one-way valve 205. The multi-parameter sensor 15 and the first solenoid valve 204 are electrically connected to the controller 5. The multi-parameter sensor 15 is used to detect the parameters of the water in the main channel 203 when the first solenoid valve 204 is closed. The setting position of the multi-parameter sensor 15 is clear. When the first solenoid valve 204 is closed, the water in the main channel 203 is relatively still, which is conducive to the multi-parameter sensor 15 to detect the water parameters more accurately and stably, reduce the interference of water flow fluctuations on the detection results, and further improve the accuracy of water quality detection.

[0042] It also includes a data processing module 4 electrically connected to the controller 5. The data processing module 4 is a 4GDTU and is located inside the detection box 1. The data processing module 4 includes a microprocessor 401, a circuit board 402, a memory 403, and a data output module 404 that are electrically connected to each other. The memory 403 is used to store monitoring data, and the data output module 404 is used to communicate with external devices. The memory 403 can store monitoring data for a long time, which facilitates the subsequent analysis and query of historical data and provides data support for the study of water quality change trends and the tracing of water pollution events. The data output module transmits the monitoring data to external devices, so that other relevant systems or personnel can obtain water quality information in a timely manner, realize data sharing and comprehensive utilization, and improve the efficiency of water resource management and the scientific nature of decision-making.

[0043] The data output module 404 includes a wireless communication unit and a wired data output module. The wireless communication unit is used to communicate with the remote monitoring platform, and the wired data output module is used to connect with the local control system. The data output module is further subdivided into a wireless communication unit and a wired data output module. The wireless communication unit communicates with the remote monitoring platform through wireless signals such as Wi-Fi and Bluetooth, transmitting monitoring data to the remote monitoring center in real time. The wired data output module connects to the local control system through wired connections such as network cables and data cables, realizing local data transmission and control. This allows the remote monitoring platform to monitor the equipment's operating status and water quality in real time, facilitating centralized management and remote control. It also allows for on-site operation and debugging through the local control system, improving the equipment's operability and emergency response capabilities.

[0044] The data processing module 4 also includes a display screen located outside the detection box 1. The display screen is electrically connected to the microprocessor 401 and is used to display water quality monitoring data and equipment operating status.

[0045] The data processing module 4 has a built-in data filtering algorithm for preprocessing the data collected by the multi-parameter sensor 15 to eliminate noise interference. The data processing module 4 is set in the detection box and electrically connected to the controller 5. The data processing module 4 has a built-in data filtering algorithm for preprocessing the data collected by the multi-parameter sensor 15 to eliminate noise interference in the data collected by the multi-parameter sensor 15, improve data quality, and provide a reliable data foundation for subsequent accurate analysis.

[0046] It also includes a test box 1, which is a waterproof structure with an inlet 101 and an outlet 102. The water flow channel 2 includes a support frame plate 201, and a main channel 203 is fixedly installed on the support frame plate 201. The inlet end of the main channel 203 passes through the inlet 101, and the outlet end of the main channel 203 passes through the outlet 102. It also includes a return water hose 14 installed at the outlet end of the main channel 203 for returning the water to the water body to be tested.

[0047] It also includes a solar photovoltaic panel 7 and a charging controller that are electrically connected to each other and installed on the testing box 1, as well as a power module 3 installed inside the testing box 1. The charging controller is electrically connected to the power module 3. The solar photovoltaic panel 7 supplies power to the power module 3 through the charging controller. The power module 3 includes a battery pack and a charging module, which are used to provide power to various components. The battery pack is a rechargeable battery, and the charging module is used to charge the battery pack. The power module 3 is a rechargeable lithium battery with a capacity of not less than 5000mAh, which supports USB charging. The large capacity of not less than 5000mAh ensures a long battery life, reduces the number of times the battery needs to be replaced or charged, and improves the convenience of using the equipment. The battery pack is equipped with a power indicator light to display the battery power status in real time, so as to avoid the interruption of monitoring work due to insufficient power.

[0048] In this invention, 1, the device, through the water flow sensor 12 and the comparator module 6, can sense changes in water flow velocity in real time and flexibly adjust the detection frequency according to the flow velocity. It sets appropriate time intervals (first set value and second set value) for detection. Detection at appropriate time intervals can avoid data interference caused by excessively frequent detection (e.g., when the flow velocity is slow, multiple detections in a short period of time may yield similar data due to little change in the water sample, wasting resources and potentially masking the true changes). It can also avoid failing to accurately capture water quality change trends due to excessively long detection intervals (e.g., when the flow velocity is fast, not detecting for a long time may lead to missing sudden changes in water quality). Through this dynamic adjustment method, the accuracy and reliability of water quality monitoring data are improved.

[0049] 2. An appropriate water quality testing frequency helps to obtain water quality parameter information more accurately. When the flow rate changes, timely adjustment of the testing frequency can enable the equipment to conduct more intensive sampling and testing of the water body under different flow rate conditions. Dynamically adjusting the testing frequency according to the flow rate ensures that the equipment can reflect the latest water quality status in a timely manner and will not miss the critical moment of water quality change due to a fixed testing cycle, so that the monitoring results can reflect the actual water quality situation more in real time.

Claims

1. A device for monitoring the water quality of treated wastewater, comprising a water flow channel and a controller, wherein a first solenoid valve is provided on the water flow channel, characterized in that, It also includes a comparator module and a water flow sensor extending into the water body to be tested. The water flow sensor and the comparator module are electrically connected to the controller. The water flow sensor is used to detect the flow velocity of the water body to be tested. The comparator module compares the flow velocity detected by the water flow sensor with its preset threshold to determine the actual flow velocity of the water body to be tested, which is used as a reference for the controller to automatically set a first set value and a second set value. When the opening duration of the first solenoid valve reaches the first set value, the controller controls the first solenoid valve to close; when the closing duration of the first solenoid valve reaches the second set value, the controller controls the first solenoid valve to open.

2. The device for monitoring the water quality of treated wastewater according to claim 1, characterized in that: The water flow channel includes a main channel and a secondary channel. A first solenoid valve is installed on the main channel. Both ends of the secondary channel are installed on the main channel and connected to the main channel. The first solenoid valve is located between the two ends of the secondary channel. A one-way valve is also installed on the main channel. The first solenoid valve and the one-way valve are installed sequentially from the inlet end to the outlet end of the main channel. The flow direction of the one-way valve is the same as the water flow direction. One end of the secondary channel is located between the first solenoid valve and the inlet end, and the other end of the secondary channel is located between the first one-way valve and the outlet end.

3. The device for monitoring the water quality of treated wastewater according to claim 2, characterized in that: A second solenoid valve is installed on the secondary channel. The second solenoid valve is electrically connected to the controller. When the opening duration of the first solenoid valve reaches a first set value, the controller controls the second solenoid valve to open, so that the water sample can flow through the secondary channel. When the closing duration of the first solenoid valve reaches a second set value, the controller controls the second solenoid valve to close, so that the water sample can pass through the main channel.

4. The device for monitoring the water quality of treated wastewater according to claim 3, characterized in that: The response time of the first and second solenoid valves is 0.1 to 0.5 seconds, and the opening pressure of the one-way valve 205 is 0.1 MPa to 0.3 MPa.

5. The device for monitoring the water quality of treated wastewater according to claim 1, characterized in that: The controller's first set value ranges from 30 to 120 seconds, and its second set value ranges from 20 to 60 seconds.

6. The device for monitoring the water quality of treated wastewater according to claim 1, characterized in that: The water flow sensor is a Doppler flow velocity sensor with a measurement accuracy of ±0.05 m / s, a water depth range of 0.02-5 meters, and a flow velocity range of 0.02-10 m / s.

7. The device for monitoring the water quality of treated wastewater according to claim 1, characterized in that: It also includes a water intake mechanism, which includes a water intake pump detachably connected to the water inlet of the main channel. The water inlet of the water intake pump is fixedly connected to a water intake pipe, and the water inlet of the water intake pipe extends to the water body to be tested.

8. The device for monitoring the water quality of treated wastewater according to claim 7, characterized in that: A ground-inserting rod is fixedly connected to the upper part of the water intake pipe to maintain its stability, and a float plate is fixedly connected to the water inlet end of the water intake pipe to support it.

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