Floating type river water quality detector for municipal environmental monitoring

Abstract

The application discloses a floating type river water quality detector for municipal environment monitoring and belongs to the technical field of water quality detectors. The floating type river water quality detector comprises a floating body floating in a river, a fixed cylinder for sampling is fixedly installed at the lower end of the floating body, a baffle is fixedly installed at the inner side of the floating body, a detection module is installed on the baffle, a drain pipe is rotatably connected to the center position of a rotating seat, a sample tank for collecting samples and a water outlet pipe for discharging flushing water are installed on the baffle, a water inlet groove is formed in the lower end of the fixed cylinder, a purification assembly is installed at the inner side of the water inlet groove, and an elastic film is installed at the upper end of the water inlet groove. The floating type river water quality detector for municipal environment monitoring can conveniently collect and store water samples in the detection process, and can flush the pipeline with purified water after single detection, so that the detection accuracy of the subsequent detection is ensured.

Description

Technical Field

[0001] This invention relates to the field of water quality testing technology, specifically to a floating river water quality testing instrument for municipal environmental monitoring. Background Technology

[0002] In the process of municipal environmental monitoring, in order to ensure the water quality of rivers, it is necessary to use floating river water quality detectors to test the water quality of rivers. However, the existing floating river water quality detectors still have some shortcomings.

[0003] Prior art (Chinese Patent No. CN116359465B, published on 2023-09-08) discloses a floating platform-type water quality meteorological monitoring station, including a floating component comprising a floating platform, a fixing component, and a protective component. The fixing component is located within the floating platform, and the protective component is disposed on top of the fixing component. A measuring component is also disclosed, disposed within the protective component, comprising a support component, a sampling component, an adjusting component, a driving component, and a detection component. The support component is disposed within the protective component, the sampling component is located on the support component, the adjusting component is disposed on one side of the sampling component, and the driving component is located on the support component. The beneficial effects of this invention are: by setting the measuring component, water quality at multiple depths in the water body can be automatically monitored separately, making the monitoring results more accurate; and water samples taken from multiple depths can be mixed, making the monitoring results more representative. Simultaneously, the filter can be backwashed to prevent filter clogging.

[0004] Existing technology (Chinese Patent No. CN116793760B, Publication Date: 2024-01-19) discloses a sampling device for water quality testing, including a water sampler. A cleaning mechanism is located at the lower part of the water sampler, and a filtration mechanism is located inside the cleaning mechanism at the bottom of the water sampler. The water sampler is used to sample water from the area to be tested. The filtration mechanism filters out small organisms in the water during sampling. The cleaning mechanism blocks floating aquatic plants and dead leaves during sampling and cleans the filter cover in the filtration mechanism to prevent clogging. This invention enables multi-point sampling of the water area, thereby making subsequent water quality testing results more accurate. This avoids isolated cases caused by single-point sampling, which could lead to large errors between the test results and the actual results, thus facilitating accurate water quality testing.

[0005] While existing river water quality testing instruments can collect and sample water samples, they are inconvenient to collect samples multiple times and cannot flush the pipeline after a single collection. This results in residual samples from previous tests affecting the accuracy of subsequent test results, indicating certain limitations in their use. Summary of the Invention

[0006] The purpose of this invention is to provide a floating river water quality analyzer for municipal environmental monitoring, in order to solve the problems mentioned in the background art, that current river water quality analyzers on the market are inconvenient to collect samples multiple times and cannot flush the pipeline after a single collection to ensure the progress of the test.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a floating river water quality analyzer for municipal environmental monitoring, comprising a floating body floating in a river, a fixed cylinder for sampling fixedly installed at the lower end of the floating body, a partition fixedly installed on the inner side of the floating body, a detection module installed on the partition, and a motor for driving sampling fixedly installed on the inner side of the floating body; a rotating seat is elastically rotatably mounted at the upper end of the fixed cylinder, and the output end of the motor is connected to the rotating seat through a gear transmission assembly, driving the rotating seat to reciprocate. A sealing block is slidably connected to the inner side of the fixed cylinder, and a twisted rubber water delivery cylinder is sealed and fixedly connected between the rotating seat and the sealing block. A water intake pipe and a rinsing water pipe are connected through the sealing block, and both the water intake pipe and the rinsing water pipe are equipped with electrically controlled valves. A drain pipe is rotatably connected to the center position of the rotating seat. A sample container for collecting samples and a water outlet pipe for discharging rinsing water are installed on the partition. A water inlet groove is opened at the lower end of the fixed cylinder, and a purification component is installed inside the water inlet groove. An elastic sheet is installed at the upper end of the water inlet groove.

[0008] Preferably, the gear transmission assembly includes a drive gear fixedly installed at the output end of the motor, a gear ring rotatably installed on the lower inner side of the floating body, and the drive gear and the gear ring mesh with each other. The inner wall of the gear ring is evenly provided with multiple sets of tooth blocks. A first transmission gear is rotatably installed on the lower inner side of the floating body, and a second transmission gear is fixedly installed on the outer side of the rotating seat. The first transmission gear and the second transmission gear mesh with each other. At the same time, the gear ring drives the first transmission gear to rotate through the multiple sets of tooth blocks on its inner side, so as to drive the rotating seat to reciprocate elastically.

[0009] Preferably, a spring is fixedly connected between the sealing block and the lower inner wall of the fixed cylinder, and the rotation seat gradually releases the twisting of the rubber water delivery cylinder during the elastic rotation process. Under the action of the spring force, the sealing block moves down along the inner wall of the fixed cylinder to stretch the rubber water delivery cylinder. At the same time, a one-way valve structure is installed on the drain pipe, and water samples are drawn through the water suction pipe during the process of the rubber water delivery cylinder returning to its cylindrical shape.

[0010] Preferably, the water-drawing pipe extends through the lower end of the fixed cylinder, and a filter screen is provided at the lower end of the water-drawing pipe. During the downward movement of the sealing block, the water-drawing pipe moves downward synchronously to extract water samples from different heights at the same location.

[0011] Preferably, the lower end of the drain pipe is rotatably connected to the detection head of the detection module, and the drain pipe and the detection head of the detection module are coaxially arranged. When the rotating seat is elastically rotated and reset, it twists the rubber water delivery cylinder and pulls the sealing block upward. During the twisting process of the rubber water delivery cylinder, water is discharged through the drain pipe.

[0012] Preferably, the toothed ring is fixedly connected to the middle of the frame and the drain pipe, and the lower part of the toothed ring and the drain pipe are coaxially arranged. During the rotation of the toothed ring, the drain pipe is driven to rotate synchronously. At the same time, during the rotation of the drain pipe, its upper port passes under the sample tank and the water outlet pipe at different positions one by one.

[0013] Preferably, the rotating seat has a positioning hole, and a sample container is inserted into the positioning hole. The lower end of the sample container has a water inlet. A frustum-shaped sealing plug for sealing is connected to the water inlet via a spring. The lower end of the sealing plug is made of magnetic material, and a magnetic sheet is fixedly installed in the upper port of the drain pipe. When the upper part of the drain pipe rotates to below the positioning hole, it is sealed and adhered to the lower surface of the partition. Under the magnetic force of the magnetic material and the magnetic sheet at its lower end, the sealing plug elastically moves downward to open the water inlet.

[0014] Preferably, the elastic sheet is configured as two rubber rings that fit together, and the elastic sheet undergoes elastic deformation under pressure during the up-and-down movement of the sealing block, thereby realizing the opening and closing of the water inlet tank.

[0015] Preferably, the lower end of the fixed cylinder is rotatably connected to a cleaning seat, and the cleaning seat is sleeved on the outside of the water intake pipe. A ball bearing is embedded in the inner wall of the cleaning seat, and a spiral guide groove is opened on the outer wall of the water intake pipe. When the water intake pipe is raised or lowered, the ball bearing rolls along the guide groove to drive the cleaning seat to rotate. A brush body that fits into the filter hole at the lower end of the water inlet is fixedly installed on the outer side of the cleaning seat.

[0016] Compared with the prior art, the beneficial effects of this invention are: the floating river water quality detector for municipal environmental monitoring can conveniently collect and store water samples during the testing process, and the pipeline can be flushed with purified water after a single test, ensuring the accuracy of subsequent tests. The specific details are as follows:

[0017] 1. The device is equipped with a rotating seat, a rubber water delivery cylinder, a water intake pipe, and a drain pipe. By controlling the motor to drive the rotating seat to rotate elastically, the rotating seat can gradually release the twisting of the rubber water delivery cylinder. This allows the sealing block to move downward under the action of the spring force, stretching the rubber water delivery cylinder. The rubber water delivery cylinder can then draw water from the river through the water intake pipe, which moves downward synchronously with the sealing block. This allows for sampling of water at different heights at the same location, avoiding detection errors caused by single sampling. As the rotating seat rotates and resets, it can twist the rubber water delivery cylinder again, causing the water sample drawn from its inner side to be transported through the drain pipe. This allows the detection module to perform water quality testing on the water in the drain pipe.

[0018] 2. It is equipped with a drain pipe and a sample container. As the drain pipe rotates, when the upper part of the drain pipe moves to the bottom of the sample container, the sealing plug in the water inlet at the bottom of the sample container will elastically move down under the magnetic force of the magnetic plate at the top of the drain pipe, thereby opening the water inlet. At this time, the water sample in the drain pipe will enter the sample container through the water inlet. When the drain pipe and the sample container are misaligned, the sealing plug will block the water inlet at the bottom of the sample container, making it easier to remove the water sample later.

[0019] 3. Equipped with a sealing block, water outlet pipe, water inlet tank, and flushing water pipe, during a single sampling, the valve on the flushing water pipe is closed. When the sealing block moves upward, the elastic sheet will undergo elastic deformation under negative pressure, allowing the water inlet tank to draw and filter river water and store it in the fixed cylinder. After sampling, the valve on the flushing water pipe is opened, controlling the sealing block to reset. The purified river water drawn from the inside of the fixed cylinder will enter the rubber water delivery cylinder through the flushing water pipe. As the rubber water delivery cylinder twists again, it can input the purified water into the drain pipe and water outlet pipe, realizing automatic flushing of the pipeline and ensuring the accuracy of the next test.

[0020] 4. Equipped with a water intake pipe and a cleaning seat, as the water intake pipe is raised or lowered, the ball bearings on the inner wall of the cleaning seat will roll along the spiral guide groove, thereby driving the cleaning seat to rotate. This allows the cleaning seat to automatically clean the filter holes of the water inlet tank, preventing clogging. When the valve on the flushing water pipe is closed, the river water sucked in from the inside of the fixed cylinder will be discharged from the water inlet tank again through the elastic sheet, achieving backflushing and further preventing clogging of the water inlet tank. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the present invention from a bottom view;

[0023] Figure 3 This is a schematic cross-sectional view of the floating body structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the toothed ring mounting structure of the present invention;

[0025] Figure 5 This is a schematic cross-sectional view of the fixed cylinder structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the elastic film mounting structure of the present invention;

[0027] Figure 7 This is a schematic diagram of the installation structure of the sealing block and rubber water delivery cylinder of the present invention;

[0028] Figure 8 For the present invention Figure 7 Enlarged structural diagram at point A in the middle;

[0029] Figure 9 This is a schematic diagram of the connection structure between the partition and the drain pipe of the present invention;

[0030] Figure 10 This is a schematic cross-sectional view of the drainage pipe of the present invention;

[0031] Figure 11 For the present invention Figure 10 Enlarged structural diagram at point B.

[0032] In the diagram: 1. Floating body; 2. Fixed cylinder; 3. Baffle; 4. Motor; 5. Drive gear; 6. Gear ring; 7. First transmission gear; 8. Rotating seat; 9. Second transmission gear; 10. Sealing block; 11. Rubber water delivery cylinder; 12. Water intake pipe; 1201. Guide groove; 13. Drain pipe; 14. Detection module; 15. Sample container; 16. Sealing plug; 17. Magnetic sheet; 18. Water outlet pipe; 19. Water inlet tank; 20. Elastic sheet; 21. Cleaning seat; 2101. Ball bearing; 22. Rinse water pipe. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1: Existing river water quality monitoring instruments are inconvenient for continuous testing and sampling. To solve this technical problem, this example discloses the following technical content. Please refer to [link / reference]. Figures 1-4 and Figure 9 As shown;

[0035] A floating river water quality analyzer for municipal environmental monitoring includes a floating body 1 that floats in the river. A sampling cylinder 2 is fixedly installed at the lower end of the floating body 1. A partition 3 is fixedly installed on the inner side of the floating body 1, and a detection module 14 is installed on the partition 3. A motor 4 for driving sampling is also fixedly installed on the inner side of the floating body 1. A rotating seat 8 is elastically rotatably mounted at the upper end of the fixed cylinder 2. The output end of the motor 4 is connected to the rotating seat 8 through a gear transmission assembly, driving the rotating seat 8. The rotating body reciprocates. A sealing block 10 is slidably connected to the inner side of the fixed cylinder 2. A twisted rubber water delivery cylinder 11 is fixedly connected between the rotating seat 8 and the sealing block 10. A water intake pipe 12 and a rinsing water pipe 22 are connected through the sealing block 10. Both the water intake pipe 12 and the rinsing water pipe 22 are equipped with electrically controlled valves. A drain pipe 13 is rotatably connected to the center of the rotating seat 8. A sample container 15 for collecting samples and a water outlet pipe 18 for discharging rinsing water are installed on the partition 3.

[0036] The gear transmission assembly includes a drive gear 5 fixedly mounted on the output end of the motor 4. A gear ring 6 is rotatably mounted on the lower inner side of the float 1, and the drive gear 5 and the gear ring 6 are meshed together. Multiple sets of tooth blocks are evenly arranged on the inner wall of the gear ring 6. A first transmission gear 7 is rotatably mounted on the lower inner side of the float 1, and a second transmission gear 9 is fixedly mounted on the outer side of the rotating seat 8. The first transmission gear 7 and the second transmission gear 9 are meshed together. At the same time, the gear ring 6 drives the first transmission gear 7 to rotate through the multiple sets of tooth blocks on its inner side, thereby driving the rotating seat 8 to reciprocate elastically. A spring is fixedly connected between the sealing block 10 and the lower inner wall of the fixed cylinder 2. During the elastic rotation of the rotating seat 8, the twisting of the rubber water delivery cylinder 11 is gradually released, and the sealing block 10 moves downward along the inner wall of the fixed cylinder 2 under the action of the spring force, thereby stretching the rubber water delivery cylinder 11. At the same time, a one-way valve structure is installed on the drain pipe 13, and water samples are drawn through the water intake pipe 12 during the process of the rubber water delivery cylinder 11 returning to its cylindrical shape. The water pipe 12 extends through the lower end of the fixed cylinder 2, and a filter screen is provided at the lower end of the water pipe 12. During the downward movement of the sealing block 10, the water pipe 12 moves downward synchronously to extract water samples from different heights at the same location.

[0037] like Figures 4-5 , Figure 7 and Figures 9-11The lower end of the drain pipe 13 is rotatably connected to the detection head of the detection module 14, and the drain pipe 13 and the detection head of the detection module 14 are coaxially arranged. When the rotating seat 8 is elastically rotated and reset, it twists the rubber water delivery cylinder 11 and pulls the sealing block 10 upward. During the twisting process, the rubber water delivery cylinder 11 drains water through the drain pipe 13. The toothed ring 6 is fixedly connected to the middle of the drain pipe 13 through the frame, and the lower part of the toothed ring 6 and the drain pipe 13 are coaxially arranged. During the rotation of the toothed ring 6, it drives the drain pipe 13 to rotate synchronously. At the same time, during the rotation of the drain pipe 13, its upper port passes through different positions one by one. Below the sample container 15 and the water outlet pipe 18, a positioning hole is provided on the rotating seat 8, and the sample container 15 is inserted into the positioning hole. A water inlet is provided at the lower end of the sample container 15. At the same time, a frustum-shaped sealing plug 16 for sealing is connected to the water inlet through a spring elastic extension and retraction. The lower end of the sealing plug 16 is made of magnetic material, and a magnetic sheet 17 is fixedly provided in the upper port of the drain pipe 13. When the upper part of the drain pipe 13 rotates to the position hole, it is sealed and attached to the lower surface of the partition plate 3. Under the magnetic force of the magnetic material at its lower end and the magnetic sheet 17, the sealing plug 16 elastically moves downward to open the water inlet.

[0038] The floating body 1 is placed in the river water, and the propulsion mechanism is controlled to move it. When it reaches the detection point, the control motor 4 drives the drive gear 5 and the gear ring 6 to mesh, thereby driving the gear ring 6 to rotate. This causes the inner teeth of the gear ring 6 to mesh with the first transmission gear 7. The first transmission gear 7, through meshing with the second transmission gear 9, drives the rotating seat 8 to rotate elastically. This allows the rotating seat 8 to gradually release the twist on the rubber water delivery cylinder 11, causing the sealing block 10 to move downward under the action of the spring force. This stretches the rubber water delivery cylinder 11, and at the same time, the valve on the water intake pipe 12 is opened, allowing the rubber water delivery cylinder 11 to draw water from the river through the water intake pipe 12. The water intake pipe 12 moves downward synchronously with the sealing block 10, thus enabling sampling of water at different heights at the same location, avoiding detection errors caused by single sampling. When the first transmission gear 7 is located between the two sets of tooth blocks inside the tooth ring 6, the rotating seat 8 will perform elastic rotation and reset, which can twist the rubber water delivery cylinder 11 again, so that the rubber water delivery cylinder 11 delivers the water sample drawn from its inner side through the drain pipe 13, so that the detection module 14 can perform water quality detection on the water in the drain pipe 13. As the drain pipe 13 rotates, when the upper part of the drain pipe 13 moves to the bottom of the sample tank 15, the sealing plug 16 in the water inlet at the bottom of the sample tank 15 will elastically move down under the magnetic force of the magnetic piece 17 at the top of the drain pipe 13, thereby opening the water inlet. At this time, the water sample in the drain pipe 13 will enter the sample tank 15 through the water inlet. When the positions of the drain pipe 13 and the sample tank 15 are misaligned, the sealing plug 16 will block the water inlet at the bottom of the sample tank 15, which facilitates the subsequent removal of the sample water.

[0039] Example 2: The technical content disclosed in this example is a further improvement based on Example 1. Existing floating river water quality analyzers are inconvenient to clean after testing, which can easily affect the accuracy of subsequent tests. To further solve this technical problem, this example discloses the following technical content: Figure 3 and Figures 5-8 As shown; the lower end of the fixed cylinder 2 is provided with a water inlet groove 19, and a purification component is installed on the inner side of the water inlet groove 19. At the same time, an elastic sheet 20 is installed on the upper end of the water inlet groove 19. The elastic sheet 20 is set as two rubber rings that fit together. During the up and down movement of the sealing block 10, the elastic sheet 20 undergoes elastic deformation under pressure, thereby opening and closing the water inlet groove 19. The lower end of the fixed cylinder 2 is rotatably connected to a cleaning seat 21, and the cleaning seat 21 is sleeved on the outside of the water intake pipe 12. The inner wall of the cleaning seat 21 is embedded with a ball bearing 2101. At the same time, the outer wall of the water intake pipe 12 is provided with a spiral guide groove 1201. When the water intake pipe 12 is adjusted up and down, the ball bearing 2101 rolls along the guide groove 1201 to drive the cleaning seat 21 to rotate. A brush body is fixedly installed on the outer side of the cleaning seat 21, which fits against the filter hole at the lower end of the water inlet groove 19.

[0040] During a single sampling, with the valve on the flushing water pipe 22 closed, the sealing block 10 moves upward, causing the elastic sheet 20 to deform elastically under negative pressure. This allows the inlet tank 19 to draw filtered river water and store it in the fixed cylinder 2. After sampling, when the valve on the flushing water pipe 22 is opened and the sealing block 10 is reset, the purified river water drawn from the inside of the fixed cylinder 2 enters the rubber water delivery cylinder 11 through the flushing water pipe 22. As the rubber water delivery cylinder 11 twists again, it can input the purified water into the drain pipe 13 and the outlet pipe 1. 8. Automatic flushing of the pipeline ensures the accuracy of the next test. As the water pipe 12 is raised and lowered, the ball bearings 2101 on the inner wall of the cleaning seat 21 will roll along the spiral guide groove 1201, thereby driving the cleaning seat 21 to rotate. This allows the cleaning seat 21 to automatically clean the filter holes of the water inlet tank 19, preventing blockage. When the valve on the flushing water pipe 22 is closed, as the sealing block 10 moves down, the river water sucked in by the inner side of the fixed cylinder 2 will be discharged from the water inlet tank 19 again through the elastic sheet 20, achieving backflushing and further preventing blockage of the water inlet tank 19.

[0041] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0042] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 floating river water quality detector for municipal environmental monitoring, comprising a floating body (1) floating in a river, and a fixed cylinder (2) for sampling is fixedly installed at the lower end of the floating body (1), and a partition (3) is fixedly installed on the inner side of the floating body (1), while a detection module (14) is installed on the partition (3), and a motor (4) for driving sampling is also fixedly installed on the inner side of the floating body (1). Its features are, A rotating seat (8) is elastically rotatably mounted on the upper end of the fixed cylinder (2), and the output end of the motor (4) is connected to the rotating seat (8) through a gear transmission assembly, driving the rotating seat (8) to reciprocate. A sealing block (10) is interference-slidably connected to the inner side of the fixed cylinder (2), and a twisted rubber water delivery cylinder (11) is sealed and fixedly connected between the rotating seat (8) and the sealing block (10). A water intake pipe (12) and a flushing water pipe are connected through the sealing block (10). (22), and electrically controlled valves are installed on both the water intake pipe (12) and the rinsing water pipe (22). A drain pipe (13) is rotatably connected to the center of the rotating seat (8). A sample container (15) for collecting samples and a water outlet pipe (18) for discharging rinsing water are installed on the partition (3). A water inlet trough (19) is opened at the lower end of the fixed cylinder (2), and a purification component is installed on the inner side of the water inlet trough (19). An elastic film (20) is installed at the upper end of the water inlet trough (19). A spring is fixedly connected between the sealing block (10) and the lower inner wall of the fixed cylinder (2). During the elastic rotation of the rotating seat (8), the twisting of the rubber water delivery cylinder (11) is gradually released. Under the action of the spring force, the sealing block (10) moves down along the inner wall of the fixed cylinder (2) to stretch the rubber water delivery cylinder (11). At the same time, a one-way valve structure is installed on the drain pipe (13). During the process of the rubber water delivery cylinder (11) returning to the cylindrical shape, water samples are drawn through the water suction pipe (12). The lower end of the fixed cylinder (2) is rotatably connected to a cleaning seat (21), and the cleaning seat (21) is sleeved on the outside of the water pipe (12). A ball bearing (2101) is embedded in the inner wall of the cleaning seat (21). At the same time, a spiral guide groove (1201) is opened on the outer wall of the water pipe (12). When the water pipe (12) is raised and lowered, the ball bearing (2101) rolls along the guide groove (1201) to drive the cleaning seat (21) to rotate. A brush body that fits into the filter hole at the lower end of the water inlet tank (19) is fixedly installed on the outside of the cleaning seat (21).

2. The floating river water quality analyzer for municipal environmental monitoring according to claim 1, characterized in that: The gear transmission assembly includes a drive gear (5) fixedly installed at the output end of the motor (4). A gear ring (6) is rotatably installed on the lower inner side of the floating body (1). The drive gear (5) and the gear ring (6) are meshed and connected. Multiple sets of tooth blocks are evenly arranged on the inner wall of the gear ring (6). A first transmission gear (7) is rotatably installed on the lower inner side of the floating body (1). A second transmission gear (9) is fixedly installed on the outer side of the rotating seat (8). The first transmission gear (7) and the second transmission gear (9) are meshed and connected. At the same time, the gear ring (6) drives the first transmission gear (7) to rotate through multiple sets of tooth blocks on its inner side, so as to drive the rotating seat (8) to reciprocate elastically.

3. The floating river water quality analyzer for municipal environmental monitoring according to claim 1, characterized in that: The water-drawing pipe (12) extends through the lower end of the fixed cylinder (2), and a filter screen is provided at the lower end of the water-drawing pipe (12). During the downward movement of the sealing block (10), the water-drawing pipe (12) moves downward synchronously to extract water samples from different heights at the same location.

4. The floating river water quality analyzer for municipal environmental monitoring according to claim 1, characterized in that: The lower end of the drain pipe (13) is connected to the detection head of the detection module (14) through a sealed rotatable connection. The drain pipe (13) and the detection head of the detection module (14) are coaxially arranged. When the rotating seat (8) is elastically rotated and reset, it twists the rubber water delivery cylinder (11) and pulls the sealing block (10) upward. During the twisting process, the rubber water delivery cylinder (11) drains water through the drain pipe (13).

5. A floating river water quality analyzer for municipal environmental monitoring according to claim 2, characterized in that: The toothed ring (6) is fixedly connected to the middle of the frame and the drain pipe (13), and the lower part of the toothed ring (6) and the drain pipe (13) are coaxially arranged. During the rotation of the toothed ring (6), the drain pipe (13) is driven to rotate synchronously. At the same time, during the rotation of the drain pipe (13), its upper port passes under the sample tank (15) and the water outlet pipe (18) at different positions one by one.

6. A floating river water quality analyzer for municipal environmental monitoring according to claim 5, characterized in that: The rotating seat (8) has a positioning hole, and a sample container (15) is inserted into the positioning hole. A water inlet is provided at the lower end of the sample container (15). A frustum-shaped sealing plug (16) for sealing is connected to the water inlet by a spring. The lower end of the sealing plug (16) is made of magnetic material. A magnetic sheet (17) is fixedly installed in the upper port of the drain pipe (13). When the upper part of the drain pipe (13) rotates to the position hole, it is sealed and attached to the lower surface of the partition plate (3). The sealing plug (16) moves elastically downward under the magnetic force of the magnetic material and the magnetic sheet (17) at its lower end to open the water inlet.

7. A floating river water quality analyzer for municipal environmental monitoring according to claim 1, characterized in that: The elastic sheet (20) is configured as two rubber rings that fit together, and the elastic sheet (20) undergoes elastic deformation under pressure during the up-and-down movement of the sealing block (10), thereby realizing the opening and closing of the water inlet tank (19).

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