Online in-situ water quality detection method and system

Abstract

The invention provides an online in-situ water quality detection method and system, and relates to the technical field of water quality detection.The online in-situ water quality detection system comprises a detection unit including a multi-parameter sensor, and the multi-parameter sensor includes a probe fixing frame and a plurality of multi-parameter probes; a plurality of multi-parameter probes are distributed and fixedly mounted on the probe fixing frame in a circular array manner by taking the vertical rotation axis as the center; the conveying unit comprises a telescopic rod, an electric turntable, a waterproof cable and a fixing piece; wherein the electric turntable is fixed at the upper end of the control box through a fixing piece, the waterproof cable main body is wound on the surface of the electric turntable, and the tail end of the waterproof cable main body is wound around the telescopic tail end of the telescopic rod and is bolted with the detection unit; the cleaning unit comprises a supporting frame and a double-head cleaning spray head arranged at the upper end of the supporting frame. According to the invention, multiple positions in the water body can be rapidly detected in real time, sampling is not needed, the detection effect is good, and the detection efficiency is high.

Description

Technical Field

[0001] The present invention relates to the technical field of water quality detection, and in particular to an online in-situ water quality detection method and system. Background Art

[0002] As the global environment and ecosystems continue to change, water pollution is becoming increasingly prominent. Relevant departments and institutions have introduced a series of regulations and measures to reduce water pollution, and have set high standards and strict requirements for water quality monitoring capabilities: strengthening the intensity and breadth of water quality monitoring, improving the level and efficiency of monitoring technology, and improving water quality monitoring networks and early warning systems. Therefore, water quality monitoring is of great significance in assessing water quality, warning of pollution, regulating water treatment processes, and detecting the effectiveness of treatment.

[0003] Currently, water quality monitoring mainly adopts sampling detection and in-situ detection. Among them, the sampling detection method may mix with water from other locations during the sampling process, and the parameters of the sample will change, which cannot achieve the same effect as the in-situ water quality parameters, resulting in deviations in the detection data. The traditional in-situ detection method increases labor costs and makes monitoring difficult. Therefore, the development of a device that can automatically detect water quality in situ is of great significance to improving the efficiency of water quality monitoring. Summary of the Invention

[0004] In response to the above problems, the present invention provides an online in-situ water quality detection method and system, which can quickly perform real-time detection of multiple locations in the water body without sampling, with good detection effect and high detection efficiency.

[0005] In order to solve the above problems, the technical solution adopted by the present invention is: An online in-situ water quality detection system comprises: a detection unit comprising a multi-parameter sensor, wherein the multi-parameter sensor comprises a probe fixing frame and a plurality of multi-parameter probes, wherein the plurality of multi-parameter probes are fixedly mounted on the probe fixing frame in a circular array distributed around a vertical rotation axis; a conveying unit comprising a telescopic rod, an electric turntable, a waterproof cable and a fixing member; wherein the electric turntable is fixed to the upper end of a control box by a fixing member, the main body of the waterproof cable is wound around the surface of the electric turntable, the end of the cable passes through the telescopic end of the telescopic rod and is bolted to the detection unit; a cleaning unit comprising a support frame and a double-headed cleaning nozzle arranged at the upper end of the support frame, wherein the double-headed cleaning nozzle rotates directionally around the vertical rotation axis while spraying cleaning liquid to complete the cleaning of the surfaces of the plurality of multi-parameter probes.

[0006] Preferably, the telescopic rod includes a main rod body, a first telescopic member and a second telescopic member, and the telescopic rod is fixedly mounted on the upper end of the control box by a fixed bracket.

[0007] Preferably, the main rod body also includes a driving assembly; wherein, the first telescopic member and the second telescopic member are arranged inside the main rod body; the second telescopic member is arranged inside the first telescopic member; the driving assembly is connected to the first telescopic member and the second telescopic member, and the driving assembly can drive the first telescopic member and the second telescopic member to perform linear displacement along the axial direction of the main rod body; a metal hook is welded at the top of the second telescopic member for connecting a waterproof cable for it to pass through.

[0008] Preferably, the main rod body, the first telescopic member and the second telescopic member are all made of a composite material with high rigidity and light weight.

[0009] Preferably, it also includes a display screen, a data analysis module and a controller installed on the outer end of the front door of the control box, and the controller is electrically connected to the double-head cleaning nozzle, telescopic rod, electric turntable, waterproof cable and multi-parameter probe respectively.

[0010] Preferably, the cleaning unit further comprises a pure water tank and a peristaltic pump, the peristaltic pump comprises a water pipe, the water inlet end of the water pipe is installed inside the pure water tank, and the water inlet end is installed at the left end of the support frame.

[0011] Preferably, a variable counterweight device is further provided at the upper end of the probe fixing frame, and the variable counterweight device includes a receiving chamber and a delivery pump, and the delivery pump and the receiving chamber are connected through a delivery pipe.

[0012] Preferably, the delivery pump is electrically connected to the electric turntable, and the delivery pump is controlled to extract gas from the accommodating chamber during the unwinding process of the electric turntable, and to pump gas into the accommodating chamber during the rewinding process of the electric turntable.

[0013] Through the above-mentioned structural setting, the gas in the accommodating chamber can be extracted during the detection and unwinding process. The bottom of the accommodating chamber is also connected to a U-shaped connecting pipe, which can draw the liquid in the water body into the accommodating chamber, thereby improving the overall quality, accelerating the descent of the detection unit, and quickly performing detection on multiple positions.

[0014] During the winding process, delivering gas into the containing chamber can discharge the internal liquid, accelerate the floating of the entire device, reduce the overall mass, reduce structural loss, and at the same time shorten the return cleaning time and improve the efficiency of subsequent cleaning.

[0015] At the same time, an opening can be set at the top of the accommodating chamber. During the cleaning process, liquid is pumped into the accommodating chamber through a delivery pump, which can increase the mass of the detection unit, avoid violent shaking during high-pressure rotary cleaning, and ensure the stability of the overall cleaning.

[0016] An online in-situ water quality detection method is characterized by using the above-mentioned online in-situ water quality detection system, including the following steps: S1, assembling the detection unit; S2, transporting the detection unit to a predetermined position outside by a conveying unit to complete the detection of the water quality of the water body; S3, after the water quality detection of the water body is completed, transporting the detection unit to a predetermined position inside by a conveying unit to complete the efficient cleaning of the detection unit.

[0017] The beneficial effects of the present invention are: (1) The present invention arranges an electric telescopic rod and a waterproof cable at the upper end of the control box to transport a multi-parameter sensor to a designated monitoring point to achieve in-situ detection of water quality.

[0018] (2) The multi-parameter sensor of the present invention can be installed with up to 12 multi-parameter probes at the same time to achieve online detection of multiple water quality parameters.

[0019] (3) The dual-head cleaning nozzle of the present invention can clean all the multi-parameter probes by rotating 180 degrees once, which reduces the cleaning time and power consumption, and at the same time reduces the workload of field operation and maintenance personnel, thereby improving operation and maintenance efficiency.

[0020] (4) Each detection instruction of the present invention sets three tests, and the data is outputted (in the form of mean value ± standard deviation) through the data analysis module, thereby reducing the error and making the detection result more reliable and accurate; at the same time, according to the size of the standard deviation, the operation and maintenance personnel can be reminded to calibrate the instrument in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The figure is a schematic diagram of the detection mode structure of an online in-situ water quality detection system according to an embodiment of the present invention.

[0022] Figure 2 The figure is a schematic diagram of the cleaning mode structure of an online in-situ water quality detection system according to an embodiment of the present invention.

[0023] Figure 3 Schematic diagram of the structure of the multi-parameter sensor.

[0024] Figure 4 Schematic diagram of the top view distribution of multi-parameter sensors and dual-head cleaning nozzles.

[0025] In the figure: 1. Control box; 11. Display screen; 12. Controller; 13. Data analysis module; 14. Power module; 15. Communication module; 16. Pure water tank; 17. Peristaltic pump; 171. Water pipe; 18. Support frame; 19. Double-head cleaning nozzle; 2. Conveyor; 21. Telescopic rod; 211. Main rod body; 212. First telescopic part; 213. Second telescopic part; 214. Fixed bracket; 22. Electric turntable; 23. Waterproof cable; 24. Fixing part; 3. Multi-parameter sensor; 31. Probe fixing frame; 32. Elastic clamp; 33. Multi-parameter probe. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings and examples.

[0027] Reference Figures 1-4 The present invention provides an online in-situ water quality detection system, which includes a control unit, a delivery unit and a monitoring unit.

[0028] The control unit includes a display screen 11, a controller 12, a data analysis module 13, a power module 14, a communication module 15, a pure water tank 16, a peristaltic pump 17, a support frame 18 and a double-head cleaning nozzle 19; wherein, the display screen 11 is installed at the outer end of the front door of the control box 1 to display the water quality index test results; the controller 12, data analysis module 13, power module 14, communication module 15, pure water tank 16 and peristaltic pump 17 are located inside the control box 1; the peristaltic pump 17 is installed at the upper end of the pure water tank 16.

[0029] The conveying unit includes a telescopic rod 21, an electric turntable 22, a waterproof cable 23 and a fixing member 24; wherein the electric turntable 22 is fixed to the upper end of the control box 1 by the fixing member 24.

[0030] The detection unit, the multi-parameter sensor 3 includes a probe fixing frame 31, an elastic clamp 32 and a multi-parameter probe 33; the multi-parameter sensor 3 is composed of a probe fixing frame 31 and a plurality of multi-parameter probes 33, and the multi-parameter probes 33 are fixed on the probe fixing frame 31 through the elastic clamp 32 in a circular array distributed around the vertical rotation axis.

[0031] The controller 12 is electrically connected to the peristaltic pump 17 , the double-head cleaning nozzle 19 , the telescopic rod 21 , the electric turntable 22 , the waterproof cable 23 and the multi-parameter probe 33 .

[0032] The power supply module 14 includes an uninterruptible power supply (UPS) device and a built-in power cord equipped with a standard 220V plug, and has a fuse and a lightning protection module inside.

[0033] The communication module 15 includes an RS232 / 485 connection, a USB port connection and a screen communication port; among them, the RS232 / 485 connection can directly output the water quality data processed by the data analysis module 13; the USB port connection is used to insert an external memory to upgrade the system and back up data, and can be connected to an external USB printer; the screen communication port can be connected to the display screen 11, and can also be connected to a switch for controlled control and data transmission; the communication module 15 can upload the online monitoring results to the display screen and the server, and alarm through an alarm bell or text message when the water quality index exceeds a specific threshold.

[0034] The peristaltic pump 17 includes a water pipe 171, the water inlet end of the water pipe 171 is installed inside the pure water tank 16, and the water inlet end is installed at the left end of the support frame 18; the peristaltic pump 17 is set to a certain pumping speed to prevent the water outlet speed of the double-head cleaning nozzle 19 from being too high and damaging the multi-parameter probe 33; the pumping time of the peristaltic pump 17 is controlled by the controller 12, which can meet the full coverage cleaning of the multi-parameter probe 33.

[0035] The telescopic rod 21 includes a main rod body 211, a first telescopic member 212 and a second telescopic member 213. The telescopic rod 21 is fixedly mounted on the upper end of the control box 1 by a fixing bracket 214.

[0036] The main rod body 211 also includes a driving assembly; wherein, the first telescopic member 212 and the second telescopic member 213 are arranged inside the main rod body 211; the second telescopic member 213 is arranged inside the first telescopic member; the driving assembly is connected to the first telescopic member 212 and the second telescopic member 213, and the driving assembly can drive the first telescopic member 212 and the second telescopic member 213 to perform linear displacement along the axial direction of the main rod body; a metal hook is welded at the top of the second telescopic member 213, which can be used to connect the waterproof cable 23.

[0037] The telescopic rod 21 is controlled by a drive assembly controlled by the controller 12 to achieve multi-stage telescopic extension and retraction. The main rod body 211, the first telescopic member 212, and the second telescopic member 213 are all made of a highly rigid and lightweight composite material. The highly rigid and lightweight composite material may preferably be a carbon fiber composite material, a glass fiber composite material, or a high-strength polymer composite material. The telescopic rod 21 can be customized in length according to specific circumstances, making it suitable for online in-situ testing in a variety of water areas.

[0038] One end of the waterproof cable 23 is fixed to the electric turntable 22, and the other end passes through the metal hook and is then connected to the multi-parameter sensor 3; when the electric turntable 22 rotates, the waterproof cable 23 can be rolled up or released to change the position of the multi-parameter probe 33.

[0039] The electric turntable 22 can be fixedly installed on one end of the control box 1, and the installation end position is consistent with the extension direction of the telescopic rod 21; the electric turntable 22 is controlled by the controller 12 in terms of its rotation time, rotation speed and rotation direction; it can be understood that in the detection mode, the electric turntable 22 rotates in a clockwise direction, and the waterproof cable 23 can transport the multi-parameter sensor 3 to a designated position and drop it into the water area after being released, so as to monitor the water quality directly in situ without changing the water quality parameters; in the cleaning mode, the electric turntable 22 rotates in a counterclockwise direction, which can control the multi-parameter sensor 3 to leave the water surface and return to the initial position to wait for cleaning; the operator does not need to go to the monitoring point in person to perform water quality detection, which greatly improves efficiency and saves manpower.

[0040] The waterproof cable 23 is respectively connected to the multi-parameter sensor 3 and the controller 12 to realize the transmission of detection data. At the same time, the waterproof cable 23 can be extended or shortened along with the electric turntable 22 to make the multi-parameter sensor 3 move away from or close to the control box 1; since the installation hole for the waterproof cable 23 is provided at a metal hook welded at the top of the second telescopic member 213, the waterproof cable 23 first moves with the telescopic rod 21 to the designated monitoring point above the water surface, and then rotates along the electric turntable 22 to release the cable and lower the multi-parameter sensor 3 into the water.

[0041] The double-head cleaning nozzle 19 is controlled to rotate by the controller 12, and the rotation frequency and rotation duration of the nozzle are set according to the instructions of the controller 12; in the cleaning mode, water comes from the peristaltic pump and is pumped to the pipe inside the support frame 18 through the water pipe 171, and finally reaches the double-head cleaning nozzle 19; the double-head cleaning nozzle 19 can achieve the cleaning of all multi-parameter probes by rotating 180 degrees once, reducing cleaning time and power consumption.

[0042] The multi-parameter sensor 3 is controlled by the controller 12 to monitor the frequency. Each detection instruction is set to three times, and the data is output through the data analysis module 13 (in the form of mean value ± standard deviation). The waterproof grade of the multi-parameter probe 33 is IP68. The number of the multi-parameter probes 33 can be selected as needed, and can be up to 12, so the range of probes available is wide.

[0043] The multi-parameter probes 33 can be installed up to 12 according to the reserved holes opened on the top of the probe fixing frame 31; the multi-parameter probes 33 can be selected according to actual needs, such as conventional five-parameter probes, microbial probes, liquid level probes and redox potential probes.

[0044] The multi-parameter probe 33 receives control instructions from the controller 12 to control the measurement cycle and frequency, real-time data extraction, historical data storage, etc. of the multi-parameter probe 33, thereby completing online cross-sectional monitoring of various water quality parameters in various water bodies; the multi-parameter probe 33 is arranged according to the user's measurement needs and can monitor up to 12 water quality parameters at the same time. The data is uploaded to the display screen and server through the communication module 15, and an alarm is issued through an alarm bell or text message when the water quality index exceeds a specific threshold. Example

[0045] An online in-situ water quality detection method and system, comprising a control unit, a delivery unit, and a monitoring unit; the online in-situ water quality detection method and system in embodiment 1 operate in the detection mode as follows: When the controller issues a detection command, the telescopic rod 21 first performs a directional linear displacement horizontally along the monitoring point. Simultaneously, the electric turntable 22 begins to rotate clockwise, releasing the waterproof cable 23 (the rotation speed is set to a certain value so that the waterproof cable 23 and the telescopic rod 21 are consistent in length), thereby moving the multi-parameter sensor 3 above the water surface at the designated monitoring point. Next, the electric turntable 22 continues to rotate, releasing the waterproof cable 23, until the multi-parameter sensor 3 is lowered into the water at a certain height (or multiple heights) for the first detection. After the first detection is completed, the electric turntable 22 winds up the waterproof cable 23 in a counterclockwise direction until the multi-parameter sensor 3 is out of the water. After a few seconds, the electric turntable 22 continues to rotate, releasing the waterproof cable 23, until the multi-parameter sensor 3 is lowered into the water at the same height. This process is repeated three times. Finally, the three detection results are processed by the data analysis module 13 to obtain the final result (mean ± standard deviation). The communication module 15 uploads the data to the display screen and server. When the water quality index exceeds a specific threshold, an alarm is issued through an alarm bell or text message. This mode can realize online multi-parameter in-situ detection of water quality, making the detection results more reliable and accurate. Example

[0046] An online in-situ water quality detection method and system, comprising a control unit, a delivery unit, and a monitoring unit; the operation steps of the online in-situ water quality detection method and system in the cleaning mode in Example 2 are as follows: When the controller issues a cleaning command, first, the telescopic rod 21 performs a directional linear displacement along the horizontal direction of the control box 1, and at the same time, the electric turntable 22 starts to rotate counterclockwise to tighten the waterproof cable 23 (the rotation speed is set to a certain value so that the waterproof cable 23 is consistent with the telescopic length of the telescopic rod 21), until the telescopic rod returns to the initial position and stops rotating; then, the peristaltic pump 17 starts to extract pure water from the pure water tank 16, and transports it to the double-headed cleaning nozzle 19 through the water pipe 171. At this time, the double-headed cleaning nozzle 19 starts to rotate at a constant speed along a certain rotation direction to clean the multi-parameter probe 33; after rotating 180 degrees, all multi-parameter probes 33 can be cleaned, which reduces cleaning time and power consumption and saves labor costs; finally, after all multi-parameter probes 33 are cleaned, the peristaltic pump 17 stops working The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An online in-situ water quality detection system, characterized in that: include: The detection unit comprises a multi-parameter sensor (3), wherein the multi-parameter sensor (3) comprises a probe fixing frame (31) and a plurality of multi-parameter probes (33), wherein the plurality of multi-parameter probes (33) are fixedly mounted on the probe fixing frame (31) in a circular array distributed around a vertical rotation axis. The conveying unit comprises a telescopic rod (21), an electric turntable (22), a waterproof cable (23) and a fixing member (24); wherein the electric turntable (22) is fixed to the upper end of the control box (1) by the fixing member (24); the main body of the waterproof cable (23) is wound around the surface of the electric turntable (22), and the end thereof is wound around the telescopic end of the telescopic rod (21) and bolted to the detection unit; The cleaning unit comprises a support frame (18) and a double-headed cleaning nozzle (19) arranged at the upper end of the support frame (18), wherein the double-headed cleaning nozzle (19) rotates around a vertical rotation axis while spraying cleaning liquid to clean the surfaces of the multiple multi-parameter probes (33).

2. The online in-situ water quality detection system according to claim 1, characterized in that: The telescopic rod (21) comprises a main rod body (211), a first telescopic member (212) and a second telescopic member (213); the telescopic rod (21) is fixedly mounted on the upper end of the control box (1) by a fixing bracket (214).

3. The online in-situ water quality detection system according to claim 2, characterized in that: The main rod body (211) further includes a driving assembly; wherein the first telescopic member (212) and the second telescopic member (213) are arranged inside the main rod body (211); the second telescopic member (213) is arranged inside the first telescopic member; the driving assembly is connected to the first telescopic member (212) and the second telescopic member (213), and the driving assembly can drive the first telescopic member (212) and the second telescopic member (213) to perform linear displacement along the axial direction of the main rod body; a metal hook is welded to the top end of the second telescopic member (213) for connecting the waterproof cable (23) for the waterproof cable to pass through.

4. The online in-situ water quality detection system according to claim 3, characterized in that: The main rod body (211), the first telescopic member (212) and the second telescopic member (213) are all made of a composite material with high rigidity and light weight.

5. The online in-situ water quality detection system according to claim 1, characterized in that: The device further comprises a display screen (11), a data analysis module (13) and a controller (12) installed on the outer end of the front door of the control box (1), wherein the controller (12) is electrically connected to the double-head cleaning nozzle (19), the telescopic rod (21), the electric turntable (22), the waterproof cable (23) and the multi-parameter probe (33).

6. The online in-situ water quality detection system according to claim 1, characterized in that: The cleaning unit further comprises a pure water tank (16) and a peristaltic pump (17). The peristaltic pump (17) comprises a water pipe (171). The water inlet end of the water pipe (171) is installed inside the pure water tank (16), and the water inlet end is installed at the left end of the support frame (18).

7. The online in-situ water quality detection system according to claim 1, characterized in that: A variable counterweight device is also provided at the upper end of the probe fixing frame (31), and the variable counterweight device comprises a receiving chamber and a delivery pump, and the delivery pump and the receiving chamber are communicated through a delivery pipe.

8. The online in-situ water quality detection system according to claim 7, characterized in that: The delivery pump is electrically connected to the electric turntable (22). During the unwinding process of the electric turntable (22), the delivery pump is controlled to extract the gas in the accommodating chamber. During the rewinding process of the electric turntable (22), the gas is pumped into the accommodating chamber.

9. An online in-situ water quality detection method, characterized in that: The online in-situ water quality detection system according to any one of claims 1 to 8 comprises the following steps: S1. Assemble the detection unit; S2. The detection unit is transported to a predetermined location outside by the transport unit to complete the detection of water quality; S3. After the water quality test is completed, the detection unit is transported to a predetermined position inside by the transport unit to complete efficient cleaning of the detection unit.

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