A water quality monitoring system and method

Abstract

This invention relates to the field of pollution control and treatment technology, and in particular to a water quality monitoring system and method. The system includes a water sample processing station, a sampling vessel, a water delivery pipe, and an automatic winding and unwinding mechanism. The water sample processing station is located on the shore of a water area; the sampling vessel is navigable on the water surface; the end of the water delivery pipe is connected to the water sample processing station, and the front end of the water delivery pipe is slidably mounted on the sampling vessel; the automatic winding and unwinding mechanism is located at the water sample processing station and connected to the end of the water delivery pipe, used to wind or unwind the water delivery pipe. This invention proposes a water quality monitoring system and method to solve the problems of low efficiency and poor real-time performance of manual inspection and sampling, while also addressing the issues of fixed monitoring stations being unable to move flexibly, difficult to cover areas far from the shore, and difficult to achieve accurate sampling at multiple points and depths.

Description

Technical Field

[0001] This invention relates to the field of pollution control and treatment technology, and in particular to a water quality monitoring system and method. Background Technology

[0002] Water quality monitoring is a fundamental aspect of water pollution control and treatment. By regularly or continuously monitoring key indicators such as pH, dissolved oxygen, turbidity, ammonia nitrogen, and total phosphorus in water bodies, we can promptly grasp the pollution status, trends, and treatment effects of water bodies, providing a scientific basis for tracing pollution sources, formulating treatment measures, and assessing water ecological security.

[0003] Currently, water quality monitoring largely relies on manual inspection and sampling, and fixed monitoring stations. Manual inspection and sampling is labor-intensive, has a low sampling frequency, poor real-time performance, and is difficult to achieve multi-point, high-frequency sampling coverage in large water areas, resulting in high labor costs. While fixed monitoring stations (such as a fixed water environment monitoring device, authorization announcement number CN218212167U) can achieve continuous monitoring at fixed points, they are limited by their installation location, cannot be flexibly moved, and cannot obtain water samples from any location in the water area, especially failing to effectively cover areas far from the shore, affecting the accuracy and comparability of monitoring data. Summary of the Invention

[0004] In view of this, the present invention proposes a water quality monitoring system and method to solve the problems of low efficiency and poor real-time performance of manual inspection and sampling, while also solving the problems of fixed monitoring stations being unable to move flexibly, difficult to cover areas far from the shore, and difficult to achieve accurate sampling at multiple points and depths.

[0005] The technical solution of this invention is implemented as follows: On one hand, the present invention provides a water quality monitoring system, including a water sample treatment station, a sampling vessel, a water delivery pipe, and an automatic winding and unwinding mechanism, wherein, The water sample treatment station is located on the shore of the water area; The sampling vessel is navigable and positioned on the water surface; The end of the water supply pipe is connected to the water sample treatment station, and the front end of the water supply pipe is slidably mounted on the sampling vessel; The automatic winding and unwinding mechanism is located at the water sample treatment station and connected to the end of the water supply pipe, and is used to wind or unwind the water supply pipe.

[0006] Based on the above technical solutions, preferably, the automatic winding and unwinding mechanism includes a winding motor and a drum, wherein, The winding motor is fixed inside the water sample treatment station; The drum is fixed to the output shaft of the winding motor, and the end of the water supply pipe is fixed and wound around the drum.

[0007] Based on the above technical solutions, preferably, the drum is provided with a drainage cavity, and the water sample treatment station is provided with a water quality monitoring box, wherein... The water quality monitoring box is equipped with a water intake port; The drainage cavity is connected to the water supply pipe on one side and to the water intake port on the other side.

[0008] Based on the above technical solutions, preferably, the water sample treatment station is equipped with a backwash tank, wherein the backwash tank is connected to the drainage cavity.

[0009] Based on the above technical solutions, preferably, the sampling vessel has a through hole along its vertical edge, wherein, The water supply pipe has a flat tubular structure and can float on the water surface; The front end of the water pipe passes downward through the through hole and is submerged in the water by a counterweight.

[0010] Based on the above technical solutions, preferably, two rotatable rollers are arranged opposite each other on the inner side of the through hole or at the opening, wherein, The water pipe passes between the two rollers.

[0011] Based on the above technical solutions, preferably, the pipe opening at the front end of the water supply pipe expands outward in a trapezoidal shape to form a variable diameter section, wherein... The variable diameter section has elastic blocks on its two inner sidewalls and counterweights on its outer sidewalls. The two elastic blocks abut against each other at opposite ends to seal the pipe opening.

[0012] Based on the above technical solutions, preferably, the sampling vessel is equipped with a drive motor and a worm gear assembly, wherein, The drive motor drives one of the rollers to rotate via the worm gear assembly; The outer surface of the roller and the outer surface of the water pipe are provided with matching friction textures.

[0013] Based on the above technical solution, preferably, at least two electrical wires are laid inside the water pipe, wherein... One end of each of the two wires is connected to the sampling vessel, and the other end is connected to the water sample treatment station; The two wires are spaced apart to support the inner cavity of the water pipe.

[0014] On the other hand, the present invention also provides a water quality monitoring method, which, using the above-mentioned water quality monitoring system, includes the following steps: S1. As the sampling vessel departs from the shore, the automatic unwinding mechanism unwinds the water pipe for the first time, so that the water pipe is in a slack state. S2. After the sampling vessel sails to the first target sampling point, the automatic unwinding mechanism unwinds the water pipe for the second time, causing the front end of the water pipe to slide downward relative to the sampling vessel until it contacts the water surface. S3. The automatic unwinding mechanism unwinds the water pipe for the third time, causing the front end of the water pipe to continue to sink to the first preset depth. S4. The water quality monitoring box draws water samples through the water inlet and obtains water quality data at that point after testing. By changing the position of the sampling boat or the unwinding length of the water supply pipe, water quality data at different points can be obtained. S5. Repeat steps S3-S4 at least once to lower the front end of the water pipe to a second preset depth and obtain water quality data at the second depth of that point. S6. The automatic winding and unwinding mechanism winds up the water pipe, causing the front end of the water pipe to rise and leave the water surface. S7. The sampling vessel sails to the second target sampling point and repeats steps S2-S6 to obtain the water quality data of the second point. S8. After the sampling task is completed, the sampling vessel returns to port, and the automatic winding and unwinding mechanism simultaneously winds up the sample.

[0015] The water quality monitoring system and method of the present invention have the following advantages over the prior art: (1) By setting up a sampling vessel that can navigate on the water surface and setting up a water sample treatment station on the shore, and using a water supply pipe with the end connected to the water sample treatment station and the front end slidably set on the sampling vessel, and cooperating with an automatic winding and unwinding mechanism to wind or unwind the water supply pipe, the sampling vessel can move to any position in the water area to carry out sampling work at different depths. The water sample is transported to the shore-based treatment station for testing in real time through the water supply pipe, thereby solving the problems of low efficiency and poor real-time performance of manual inspection sampling, and also solving the problems of fixed monitoring stations being unable to move flexibly and difficult to cover areas far from the shore, thus greatly improving monitoring efficiency and comparability.

[0016] (2) By setting up a winding motor and a drum in the automatic winding and unwinding mechanism, and opening a drainage cavity inside the drum, one end of the drainage cavity is connected to the water supply pipe and the other end is connected to the water inlet of the water quality monitoring box, the automatic winding and unwinding of the water supply pipe is realized. At the same time, the water sample can be directly entered into the water quality monitoring box from the water supply pipe through the drainage cavity inside the drum, avoiding intermediate transfer links, shortening the water sample transportation path, and improving the real-time performance and sealing of the detection.

[0017] (3) By setting up a backwash tank connected to the drainage cavity in the water sample treatment station, backwash medium can be introduced into the drainage cavity and water supply pipe through the backwash tank to backwash the pipeline, effectively preventing algae, mud and other debris from adhering to the inner wall of the water supply pipe and drainage cavity, reducing the risk of pipeline blockage and extending the system maintenance cycle.

[0018] (4) By setting a vertical through hole, two rollers, a drive motor, and a worm gear assembly on the sampling vessel, and setting the water delivery pipe as a flat tubular floating structure with a variable diameter section with elastic blocks at the front end, the following measures are taken: During sampling, the drive motor drives the rollers to rotate through the worm gear assembly, assisting the front end of the water delivery pipe to sink effectively; during winding, the rollers rotate in the opposite direction, the front end of the water delivery pipe rises, and the two opposing elastic blocks abut against each other to seal the pipe opening. The above structures work together to achieve stable lifting and lowering of the front end of the water delivery pipe relative to the sampling vessel, and can automatically seal the pipe opening to prevent debris from entering when not sampling. At the same time, the floating setting avoids the water delivery pipe sinking and tangling, ensuring the reliability and flexibility of the sampling operation.

[0019] (5) By laying at least two wires in the water supply pipe, with one end of the wire connected to the sampling vessel and the other end connected to the water sample treatment station, continuous power supply and two-way communication for the sampling vessel are realized; at the same time, the two wires are spaced apart to support the internal cavity of the water supply pipe, so that the water sample delivery channel inside the water supply pipe remains unobstructed during the opening and closing process, ensuring smooth sampling and backflushing. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the 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.

[0021] Figure 1 This is a side view of a water quality monitoring system according to the present invention; Figure 2 This is a partially cutaway structural diagram of the automatic winding and unwinding mechanism; Figure 3 This is a schematic diagram of the structure of the front end of the water pipe; Figure 4 This is a structural schematic diagram of the worm gear assembly. Figure 5 This is a schematic diagram of the cross-section of the water pipe; Figure 6 This is a schematic diagram of the internal structure of a water quality monitoring box; In the diagram: 1. Water sample treatment station; 2. Sampling vessel; 3. Water supply pipe; 4. Automatic winding and unwinding mechanism; 11. Water quality monitoring box; 12. Backwash tank; 21. Drum; 22. Drive motor; 23. Worm gear assembly; 31. Variable diameter section; 32. Elastic block; 33. Counterweight; 34. Wire; 41. Winding motor; 42. Drum; 201. Through hole; 111. Multi-parameter water quality sensor; 112. Automatic analyzer; 113. Data acquisition and transmission unit; 114. Control unit; 115. Water pump; 116. Sewage drainage pump; 1101. Suction port; 4201. Drainage chamber. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0023] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0024] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0027] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. Additionally, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0028] like Figure 1-6 As shown, a water quality monitoring system of the present invention includes a water sample treatment station 1, a sampling vessel 2, a water supply pipe 3, and an automatic winding and unwinding mechanism 4.

[0029] The water sample processing station 1 is fixedly located on the shore of the water area. The sampling vessel 2 is navigable on the water surface and can be equipped with a power system, navigation system, and control system to move to the target sampling point according to a preset path. The sampling vessel 2 can return autonomously or be pulled back along the original path by the winding action of the automatic winding mechanism 4 (passive return).

[0030] The end of the water supply pipe 3 is connected to the water sample treatment station 1, and the front end of the water supply pipe 3 is slidably mounted on the sampling vessel 2 and will not separate from the sampling vessel 2, that is, the water supply pipe 3 can slide vertically relative to the sampling vessel 2. The automatic winding and unwinding mechanism 4 is located inside the water sample treatment station 1 and is connected to the end of the water supply pipe 3, and is used to wind or unwind the water supply pipe 3.

[0031] With the above structure, the sampling vessel 2 can move to any location in the water area, and the water delivery pipe 3 can be unwound to different lengths as needed, allowing the front end to sink to different water depths. Water samples are then transported in real time to the water sample processing station 1 for testing via the water delivery pipe 3. This structure effectively solves the problems of low efficiency and poor real-time performance of manual inspection and sampling, while also overcoming the shortcomings of fixed monitoring stations that cannot be moved flexibly and cannot cover areas far from the shore, thus significantly improving monitoring efficiency and data comparability.

[0032] The automatic winding and unwinding mechanism 4 includes a winding motor 41 and a drum 42. The winding motor 41 is fixed inside the water sample treatment station 1, and the drum 42 is fixed to the output shaft of the winding motor 41. The end of the water supply pipe 3 is fixed and wound onto the drum 42. When the winding motor 41 rotates forward, the drum 42 winds up the water supply pipe 3; when the winding motor 41 rotates in reverse, the drum 42 releases the water supply pipe 3.

[0033] Furthermore, the drum 42 is equipped with a drainage cavity 4201. The water sample treatment station 1 is equipped with a water quality monitoring box 11, which has a suction port 1101. The side of the drainage cavity 4201 is connected to the end of the water supply pipe 3, and the other end of the drainage cavity 4201 (i.e., the end furthest from the winding motor 41) is connected to the suction port 1101 via a rotary joint. Thus, after the water sample enters the drainage cavity 4201 inside the drum 42 from the water supply pipe 3, it is directly sucked into the water quality monitoring box 11 through the suction port 1101, eliminating the need for additional intermediate pipeline connections. This results in a shorter water sample transport path, better sealing, and improved real-time detection.

[0034] The water sample treatment station 1 is also equipped with a backflushing tank 12, which is connected to the drainage chamber 4201. The backflushing tank 12 stores clean water or compressed air. After the system completes one or more samplings, the backflushing tank 12 can be activated to introduce backflushing medium into the drainage chamber 4201 and the water supply pipe 3, thereby backflushing the inner walls of the pipeline. This structure can effectively remove algae, silt, and other debris attached to the inner walls of the water supply pipe 3 and the drainage chamber 4201, significantly reducing the risk of pipeline blockage and extending the system's maintenance cycle.

[0035] Furthermore, the backwash tank 12 is connected to the water quality monitoring box 11 via a pipe. The water quality monitoring box 11 is flushed through the backwash tank 12, and the wastewater is discharged through the sewage drainage pump 116.

[0036] In addition, the water quality monitoring tank 11 is equipped with a multi-parameter water quality sensor 111 and an automatic analyzer 112. The multi-parameter water quality sensor 111 is used to detect the conventional physicochemical indicators of the water sample in real time, including but not limited to a water temperature sensor, pH sensor, dissolved oxygen sensor, conductivity sensor, and turbidity sensor. The above sensors are in contact with the water sample flowing through the water quality monitoring tank 11 through their respective detection electrodes, and output electrical signals to the signal processing module in real time. After analog-to-digital conversion, the corresponding water quality parameter data are generated. The automatic analyzer 112 is used to detect nutrient and organic matter indicators in the water sample, including an automatic ammonia nitrogen analyzer, an automatic total phosphorus analyzer, an automatic total nitrogen analyzer, and an automatic permanganate index analyzer.

[0037] Furthermore, the water quality monitoring box 11 also includes a data acquisition and transmission unit 113, a control unit 114, and a water pump 115. A drain outlet is located at the bottom of the water quality monitoring box 11, and a sewage drainage pump 116 is mounted on the drain outlet. The water pump 115 is connected to the suction port 1101. The data acquisition and transmission unit 113 is electrically connected to the multi-parameter water quality sensor 111 and the automatic analyzer 112, and is used to collect monitoring data generated by each sensor and analyzer in real time, and to perform data verification, storage, and preliminary processing.

[0038] The control unit 114 is located inside the water sample treatment station 1 or the water quality monitoring box 11. The control unit 114 is a PLC controller or an industrial computer, which is electrically connected to the winding motor 41 of the automatic winding and unwinding mechanism 4, the drive motor 22 of the sampling boat 2, the worm gear assembly 23 of the drive motor 22, each water pump and the backwash tank 12, and is used to coordinate and control the action sequence of each mechanism.

[0039] The control unit 114 can also automatically control the navigation route of the sampling vessel 2, the unwinding length of the automatic winding mechanism 4, and the start and stop of water pumping at the suction port 1101 according to the preset sampling plan, realizing fully automated sampling and testing. In addition, the control unit 114 also has a remote communication function, which can upload water quality monitoring data to a remote monitoring platform or cloud database in real time via 4G / 5G or wired network. Managers can remotely view water quality data curves and equipment operating status through computers or mobile terminals, and can remotely issue commands to adjust the monitoring frequency or initiate emergency sampling.

[0040] It should be noted that the aforementioned sensors, analyzers, PLC controllers, 4G / 5G communication, etc., are all conventional technologies in this field. Those skilled in the art can understand their implementation methods based on the functional limitation of "water quality monitoring box". The specific implementation methods and principles will not be elaborated here.

[0041] In addition, electromagnetic valves are installed on the connecting pipes of the backflushing tank 12 and the water quality monitoring box 11, on the water inlet 1101, and on the outlet of the sewage drainage pump 116 to realize the opening and closing of the water circuit.

[0042] In the above structure, the sampling vessel 2 has a vertical through-hole 201 along its upper edge. The front end of the water supply pipe 3 passes downward through the through-hole 201 and is submerged in the water by a counterweight. The water supply pipe 3 has a flat tubular structure with an overall density less than water, allowing it to float on the water surface. Furthermore, the flat, floating structure of the water supply pipe 3 makes it less prone to sinking and tangling during deployment and retrieval, improving the reliability and flexibility of the sampling operation.

[0043] To prevent the top of the through hole 201 from interfering with the movement of the water pipe 3, two rotatable rollers 21 are arranged opposite each other inside the through hole 201 or at the opening. The water pipe 3 passes between the two rollers 21 for guidance, thereby causing the front end of the water pipe 3 to sink downwards into the water. The two ends of the rollers 21 are rotatably mounted on the hull. When the water pipe 3 passes between the two rollers 21, the outer surface of the rollers 21 contacts the outer surface of the water pipe 3, and the water pipe 3 drives the rollers 21 to rotate along their own axis.

[0044] Furthermore, the sampling vessel 2 is also equipped with a drive motor 22 and a worm gear assembly 23. The drive motor 22 drives one of the rollers 21 to rotate through the worm gear assembly 23. The outer surface of the roller 21 and the outer surface of the water pipe 3 are provided with matching friction textures (such as fine stripes or knurling) to increase friction.

[0045] The worm gear assembly 23 includes a meshing worm gear and a worm. One end of the roller 21 extends through the sidewall of the through hole 201 to the outer side of the hull, and the worm gear is coaxially fixed to the outer end of the roller 21. A drive motor 22 is fixedly installed on the side of the sampling vessel 2, and the worm is coaxially fixed to the output shaft of the drive motor 22. The drive motor 22 drives the worm to rotate, the worm drives the worm gear to rotate, and the worm gear drives the roller 21 connected to it to rotate. This roller 21 serves as the active rolling element. Another roller 21 serves as the driven rolling element, cooperating with the above-mentioned active rolling element to form a roller structure to clamp the variable diameter section 31 or actively drive the water pipe 3 to slide downward. At the same time, the self-locking performance of the worm gear can effectively prevent the water pipe 3 from sliding accidentally, thereby better maintaining the submersion depth of the water pipe 3.

[0046] To prevent the tip of the water pipe 3 from detaching from the hull, the opening of the water pipe 3 expands outward in a trapezoidal shape, forming a variable diameter section 31. This variable diameter section 31 is elastic, and elastic blocks 32 are fixed to the two opposing inner sidewalls of the variable diameter section 31, while a counterweight block 33 is fixed to the outer sidewall of the variable diameter section 31. The opposing ends of the two elastic blocks 32 abut against each other, sealing the pipe opening in its natural state (non-sampling condition). Simultaneously, the variable diameter section 31 acts as a limiting part, preventing the tip of the water pipe 3 from detaching from the hull.

[0047] After the vessel reaches the sampling point, the automatic unwinding mechanism 4 unwinds the pipe, while the drive motor 22 drives the roller 21 to rotate forward via the worm gear assembly 23. The roller 21 pushes the water pipe 3 downward using its friction texture, meaning unwinding and pushing occur simultaneously. With the assistance of the counterweight 33, the front end of the water pipe 3 effectively sinks into the water. During winding, the drive motor 22 rotates in the opposite direction, and the roller 21 pulls the water pipe 3 upward, causing the front end of the water pipe 3 to rise. When the variable diameter section 31 at the front end of the water pipe 3 is pulled between the two rollers 21, the variable diameter section 31 is compressed and deformed, forcing the two elastic blocks 32 on its inner side to abut against each other under their own elasticity, automatically sealing the pipe opening and preventing external debris from entering the interior of the water pipe 3.

[0048] At least two wires 34 are laid inside the water supply pipe 3. One end of the two wires 34 is connected to the sampling vessel 2 (to provide power to the motor, sensors and other components of the sampling vessel 2, and to transmit control signals and monitoring data), and the other end is connected to the water sample treatment station 1 (to be connected to the PLC controller or industrial control computer in the station).

[0049] The water supply pipe 3 has a lead-in hole on its side, through which an electric wire 34 is introduced or led out. Sealant is applied between the electric wire 34 and the wall of the lead-in hole to prevent water or air leakage. Two electric wires 34 are spaced longitudinally inside the water supply pipe 3, their outer diameter matching the inner cavity size of the pipe. When the water supply pipe 3 is subjected to external pressure or bending, the two electric wires 34 provide support, preventing the pipe from being completely flattened and ensuring unobstructed water sample delivery. This structure enables continuous power supply and two-way communication to the sampling vessel 2, while ensuring smooth water flow during sampling and backflushing. Furthermore, due to the supporting effect of the electric wires 34, the water supply pipe 3 retains its water delivery capacity even when coiled, without hindering backflushing and sampling.

[0050] This embodiment provides a water quality monitoring method, which applies the above-mentioned water quality monitoring system and specifically includes the following steps: S1. After the system is started, the sampling vessel 2 leaves the shore (e.g., sails along a straight path), and the automatic unwinding mechanism 4 unwinds the water pipe 3 simultaneously (first unwinding), so that the water pipe 3 is in a relaxed state, avoiding excessive stretching of the water pipe 3.

[0051] S2. After the sampling vessel 2 travels along the preset path to the first target sampling point, the automatic winding and unwinding mechanism 4 unwinds the water pipe 3 for the second time, causing the front end of the water pipe 3 to slide downwards relative to the sampling vessel 2 until the variable diameter section 31 contacts the water surface. At this point, the variable diameter section 31 leaves the roller 21 and springs back to its original shape, the two elastic blocks 32 separate, and the channel opens. During this process, the automatic winding and unwinding mechanism 4 cooperates with the drive motor 22 to make unwinding and pushing occur simultaneously. With the gravity assistance of the counterweight 33, the front end of the water pipe 3 effectively sinks into the water.

[0052] S3. The automatic unwinding mechanism 4 unwinds the water pipe 3 for the third time, causing the front end of the water pipe 3 to continue to sink to the first preset depth (e.g., 0.5 meters below the water surface), and the water enters the water pipe 3.

[0053] S4. The water quality monitoring box 11 draws water samples through the suction port 1101 and obtains the water quality data at the first depth of that point after testing. Then, the position of the sampling boat 2 or the unwinding length of the water supply pipe 3 can be changed to obtain water quality data at different points or different depths.

[0054] S5. At the same sampling point, repeat steps S3-S4 at least once to lower the front end of the water pipe 3 to a second preset depth (e.g., 1.5 meters below the water surface) to obtain water quality data at the second depth of that point. This enables vertical stratified sampling.

[0055] S6. After the sampling at this point is completed, the automatic winding and unwinding mechanism 4 winds up the water pipe 3, the drive motor 22 rotates in the opposite direction, and the roller 21 pulls the water pipe 3 upward, so that the front end of the water pipe 3 rises and leaves the water surface.

[0056] S7. Sampling vessel 2 sails to the second target sampling point and repeats steps S2-S6 to obtain water quality data for the second point.

[0057] S8. After all the preset sampling tasks are completed, the drive motor 22 rotates in the opposite direction, and the roller 21 pulls the water pipe 3 upward until the variable diameter part 31 is pulled between the two rollers 21. At this time, the two elastic blocks 32 abut against each other to close the pipe opening.

[0058] S9. The sampling vessel 2 returns to port, and at the same time, the automatic winding mechanism 4 winds up the water pipe 3, so that the water pipe 3 is neatly wound on the drum 42, waiting for the next task.

[0059] 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 within the protection scope of the present invention.

Claims

1. A water quality monitoring system, characterized in that: It includes a water sample treatment station (1), a sampling vessel (2), a water supply pipe (3), and an automatic winding and unwinding mechanism (4), among which, The water sample treatment station (1) is located on the shore of the water area; The sampling vessel (2) is navigable and positioned on the water surface; The end of the water supply pipe (3) is connected to the water sample treatment station (1), and the front end of the water supply pipe (3) is slidably mounted on the sampling vessel (2); The automatic winding and unwinding mechanism (4) is located at the water sample treatment station (1) and connected to the end of the water supply pipe (3) for winding or unwinding the water supply pipe (3).

2. The water quality monitoring system as described in claim 1, characterized in that: The automatic winding and unwinding mechanism (4) includes a winding motor (41) and a drum (42), wherein, The winding motor (41) is fixed inside the water sample treatment station (1); The drum (42) is fixed on the output shaft of the winding motor (41), and the end of the water pipe (3) is fixed and wound on the drum (42).

3. The water quality monitoring system as described in claim 2, characterized in that: The drum (42) is provided with a drainage cavity (4201) inside, and the water sample treatment station (1) is provided with a water quality monitoring box (11). The water quality monitoring box (11) is equipped with a water intake port (1101). The drainage cavity (4201) is connected to the water supply pipe (3) on one side and to the water intake port (1101) on the other side.

4. The water quality monitoring system as described in claim 3, characterized in that: The water sample treatment station (1) is equipped with a backwash tank (12), wherein the backwash tank (12) is connected to the drainage cavity (4201).

5. A water quality monitoring system as described in claim 3, characterized in that: The sampling vessel (2) has a vertical through hole (201) along its upper edge, wherein, The water supply pipe (3) has a flat tubular structure and can float on the water surface; The front end of the water pipe (3) passes downward through the through hole (201) and sinks into the water body through the counterweight.

6. The water quality monitoring system as described in claim 5, characterized in that: Two rotatable rollers (21) are provided opposite to each other inside the through hole (201) or at the opening, wherein, The water pipe (3) passes between the two rollers (21).

7. A water quality monitoring system as described in claim 6, characterized in that: The sampling vessel (2) is equipped with a drive motor (22) and a worm gear assembly (23), wherein, The drive motor (22) drives one of the rollers (21) to rotate via the worm gear assembly (23); The outer surface of the roller (21) and the outer surface of the water pipe (3) are provided with mutually matching friction patterns.

8. A water quality monitoring system as described in claim 6, characterized in that: The water pipe (3) expands outward in a trapezoidal shape at its front end, forming a variable diameter section (31), wherein, The variable diameter section (31) has elastic blocks (32) on its two inner sidewalls and counterweight blocks (33) on its outer sidewall. The two elastic blocks (32) abut against each other to seal the pipe opening.

9. A water quality monitoring system as described in claim 3, characterized in that: At least two electrical wires (34) are laid inside the water pipe (3), wherein, One end of the two wires (34) is connected to the sampling vessel (2), and the other end is connected to the water sample treatment station (1). The two wires (34) are spaced apart.

10. A water quality monitoring method, using the water quality monitoring system as described in any one of claims 3-9, characterized in that: Includes the following steps: S1. The sampling vessel (2) sails away from the shore, and the automatic winding and unwinding mechanism (4) unwinds the water pipe (3) for the first time, so that the water pipe (3) is in a slack state. S2. After the sampling vessel (2) sails to the first target sampling point, the automatic winding and unwinding mechanism (4) unwinds the water pipe (3) for the second time, so that the front end of the water pipe (3) slides downward relative to the sampling vessel (2) until it contacts the water surface. S3. The automatic winding and unwinding mechanism (4) unwinds the water pipe (3) for the third time, so that the front end of the water pipe (3) continues to sink to the first preset depth. S4. The water quality monitoring box (11) draws water samples through the water inlet (1101), and obtains the water quality data of the point after detection. By changing the position of the sampling boat (2) or the unwinding length of the water supply pipe (3), water quality data of different points can be obtained. S5. Repeat steps S3-S4 at least once to lower the front end of the water pipe (3) to a second preset depth and obtain water quality data at the second depth of that point. S6. The automatic winding and unwinding mechanism (4) winds up the water pipe (3), causing the front end of the water pipe (3) to rise and leave the water surface; S7. The sampling vessel (2) sails to the second target sampling point and repeats steps S2-S6 to obtain the water quality data of the second point. S8. After the sampling task is completed, the sampling vessel (2) returns to port, and the automatic winding and unwinding mechanism (4) winds up simultaneously.

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