Floating type riverway water quality detector for municipal environment monitoring

Abstract

The invention discloses a floating type riverway water quality detector for municipal environment monitoring, and belongs to the technical field of water quality detectors, the floating type riverway water quality detector comprises a floating body floating in a riverway, the lower end of the floating body is fixedly provided with a fixing cylinder for sampling, the inner side of the floating body is fixedly provided with a partition plate, and the partition plate is provided with a detection module; a drainage pipe is rotationally connected to the center of the rotating seat, a sample tank for collecting samples and a water outlet pipe for discharging washing water are mounted on the partition plate, a water inlet groove is formed in the lower end of the fixing cylinder, a purification assembly is mounted on the inner side of the water inlet groove, and meanwhile an elastic rubber sheet is mounted 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 a water sample in the detection process, and can flush a pipeline by using a purified water body after single detection, so that the subsequent detection precision is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of water quality detection, and in particular to a floating river water quality detector for municipal environmental monitoring. Background Art

[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] The prior art (Announcement No.: CN116359465B, Chinese patent with the announcement date of 2023-09-08) discloses a floating platform type water quality meteorological monitoring station, comprising a floating assembly, including a floating platform, a fixing part and a protective part, wherein the fixing part is located in the floating platform, and the protective part is arranged on the top of the fixing part; and a measuring assembly, which is arranged in the protective part and comprises a supporting part, a sampling part, an adjusting part, a driving part and a detecting part, wherein the supporting part is arranged in the protective part, the sampling part is located on the supporting part, the adjusting part is arranged on one side of the sampling part, and the driving part is located on the supporting part. The beneficial effects of the present invention are as follows: by setting up the measuring assembly, the water quality of multiple depths of the water body can be automatically monitored separately, so that the monitoring results are more accurate, and the water sampled at multiple depths can be mixed to make the monitoring results more representative. At the same time, the filter can be backwashed to prevent the filter from being blocked; The prior art (Announcement No.: CN116793760B, Chinese Patent Publication Date: 2024-01-19) discloses a sampling device for water quality detection, including a water quality sampler, a cleaning mechanism is provided at the lower part of the water quality sampler, a water filtering mechanism is provided inside the cleaning mechanism, and the water filtering mechanism is provided at the bottom of the water quality sampler; the water quality sampler is used to sample water quality in a water area to be detected; the water filtering mechanism is used to filter smaller organisms in the water during sampling; the cleaning mechanism is used to block floating aquatic plants and dead branches and leaves in the water during sampling, and can clean the filter cover in the water filtering mechanism to avoid clogging of the filter cover. The present invention realizes multi-point sampling of the water area, thereby making the subsequent water quality detection results of the water area more accurate, thereby avoiding the situation where isolated cases exist due to single-point sampling, resulting in large errors between the detection results and the actual results, and is conducive to accurate detection of water quality; Although existing river water quality detectors can collect and sample water samples, it is inconvenient to collect the test samples multiple times, and it is impossible to flush the pipeline after a single collection, so that the previous sample remaining in the pipeline affects the accuracy of subsequent test results, and there are certain usage defects. Summary of the Invention

[0004] The purpose of the present invention is to provide a floating river water quality detector for municipal environmental monitoring, so as to solve the problem raised in the above background technology that the river water quality detectors on the market are inconvenient to collect test samples multiple times and cannot flush the pipeline after a single collection to ensure the progress of the test.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a floating river water quality detector for municipal environmental monitoring, comprising a floating body floating in the river, wherein a fixed cylinder for sampling is fixedly installed at the lower end of the floating body, and a partition is fixedly installed on the inner side of the floating body, and a detection module is installed on the partition, and a motor for driving sampling is also fixedly installed on the inner side of the floating body; a rotating seat is elastically rotatably installed on the upper end of the fixed cylinder, and the output end of the motor and the rotating seat are connected by a gear transmission assembly to drive the rotating seat to rotate back and forth, and the fixed cylinder is fixedly installed on the inner side of the floating body. The inner side of the fixed cylinder is connected with a sealing rubber block in an interference sliding manner, and a twisted rubber water delivery cylinder is sealed and fixedly connected between the rotating seat and the sealing rubber block, and a water drawing pipe and a flushing water pipe are connected through the upper part of the sealing rubber block. At the same time, electric control valves are installed on the water drawing pipe and the flushing water pipe. The center position of the rotating seat is rotatably connected to the drain pipe, and a sample tank for collecting samples and an outlet pipe for discharging the flushing water are installed on the partition. A water inlet trough is provided at the lower end of the fixed cylinder, and a purification component is installed on the inner side of the water inlet trough. At the same time, an elastic film is installed at the upper end of the water inlet trough.

[0006] Preferably, the gear transmission assembly includes a driving gear fixedly mounted on the output end of the motor, a gear ring is also rotatably mounted on the inner side of the lower part of the floating body, and the driving gear and the gear ring are meshed and connected, and multiple groups of tooth blocks are evenly arranged on the inner wall of the gear ring, a first transmission gear is also rotatably mounted on the inner side of the lower end of the floating body, and a second transmission gear is fixedly mounted on the outer side of the rotating seat, and the first transmission gear and the second transmission gear are meshed and connected, and at the same time, the gear ring drives the first transmission gear to rotate through the multiple groups of tooth blocks on its inner side to drive the rotating seat to perform reciprocating elastic rotation.

[0007] Preferably, a spring is fixedly connected between the sealing rubber block and the inner wall of the lower end of the fixed cylinder, and the twisting of the rubber water delivery cylinder is gradually released during the elastic rotation of the rotating seat, and the sealing rubber block moves downward along the inner wall of the fixed cylinder under the action of the spring force, thereby stretching the rubber water delivery cylinder. At the same time, a one-way valve structure is installed on the drain pipe, and water samples are extracted through the water drawing pipe during the process of the rubber water delivery cylinder returning to a cylindrical shape.

[0008] Preferably, the water drawing pipe is telescopically extended through the lower end of the fixed cylinder, and a filter screen is provided at the lower end of the water drawing pipe, and the downward movement of the sealing rubber block drives the water drawing pipe to move downward synchronously to extract water samples at different heights at the same position.

[0009] Preferably, the upper end of the lower part of the drain pipe is sealed and 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, and the rotating seat elastically rotates and resets to twist the rubber water delivery cylinder and pull the sealing rubber block upward. During the twisting process of the rubber water delivery cylinder, water is discharged through the drain pipe.

[0010] Preferably, the gear ring is fixedly connected to the middle part of the drain pipe through the frame, and the gear ring and the lower part of the drain pipe are coaxially arranged, and the drain pipe is driven to rotate synchronously during the rotation of the gear ring. At the same time, during the rotation of the drain pipe, its upper port passes under the sample tanks and the outlet pipe at different positions one by one.

[0011] Preferably, a positioning hole is provided on the rotating seat, and a sample tank is provided with an interference fit in the positioning hole, and a water inlet is provided at the lower end of the sample tank. At the same time, a truncated cone-shaped sealing plug for sealing is elastically connected to the water inlet through a spring, the lower end of the sealing plug is made of magnetic material, and a magnetic piece is fixedly provided in the upper port of the drain pipe, and when the upper part of the drain pipe rotates to below the positioning hole, it is sealed and fitted to the lower surface of the partition, and the sealing plug is elastically moved downward under the action of the magnetic material at its lower end and the magnetic force of the magnetic piece to open the water inlet.

[0012] Preferably, the elastic film is configured as two rubber ring structures that fit together, and the elastic film is elastically deformed under pressure during the upward and downward movement of the sealing rubber block, thereby realizing the opening and closing of the water inlet groove.

[0013] 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 drawing pipe, and a ball is embedded in the inner wall of the cleaning seat. At the same time, a spiral guide groove is provided on the outer wall of the water drawing pipe. When the water drawing pipe is raised and lowered, the ball rolls along the guide groove to drive the cleaning seat to rotate. A brush body is fixedly provided on the outside of the cleaning seat and fits into the filter hole at the lower end of the water inlet trough.

[0014] Compared with the existing technology, the present invention has the following advantages: the floating river water quality detector for municipal environmental monitoring can conveniently collect and store water samples during the detection process, and can use purified water to flush the pipeline after a single test, ensuring the accuracy of subsequent tests. The specific contents are as follows; 1. A rotating seat, a rubber water delivery cylinder, a water drawing pipe and a drainage pipe are provided. By controlling the motor to drive the rotating seat to rotate elastically, the rotating seat can gradually release the distortion of the rubber water delivery cylinder, so that the sealing rubber block moves downward under the action of the spring elastic force, so that the sealing rubber block stretches the rubber water delivery cylinder, so that the rubber water delivery cylinder can extract water from the river through the water drawing pipe, and the water drawing pipe will move downward synchronously with the sealing rubber block, thereby realizing sampling of water bodies at different heights at the same position, avoiding detection errors caused by single sampling, and as the rotating seat rotates and resets, it can twist the rubber water delivery cylinder again, so that the rubber water delivery cylinder transmits the water sample extracted from its inner side through the drainage pipe, so that the detection module can perform water quality detection on the water body in the drainage pipe; 2. A drain pipe and a sample tank are provided. As the drain pipe rotates, when the upper part of the drain pipe moves below the sample tank, the sealing plug in the water inlet hole at the lower end of the sample tank will elastically move downward under the magnetic force of the magnetic piece at the upper end of the drain pipe, thereby opening the water inlet hole. At this time, the water sample in the drain pipe will enter the sample tank through the water inlet hole. When the positions of the drain pipe and the sample tank are staggered, the sealing plug will block the water inlet hole at the lower end of the sample tank, making it easier to take the sample water later. 3. A sealing rubber block, an outlet pipe, a water inlet trough and a flushing water pipe are provided. When a single sampling is performed, the valve on the flushing water pipe is closed and the sealing rubber block moves upward, the elastic film will be elastically deformed under the action of negative pressure, so that the water inlet trough can extract filtered river water and store it in the fixed cylinder. When the sampling is completed, the valve on the flushing water pipe is opened and the sealing rubber block is controlled to reset. The purified river water extracted 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 the outlet pipe, realizing automatic flushing of the pipeline and ensuring the accuracy of the next detection.

[0015] 4. A water drawing pipe and a cleaning seat are provided. As the water drawing pipe is raised and lowered, the balls on the inner wall of the cleaning seat will roll along the spiral guide groove, thereby driving the cleaning seat to rotate, so that the cleaning seat can automatically clean the filter holes of the water inlet tank to avoid blockage. When the valve on the flushing water pipe is closed, the river water sucked into the inside of the fixed cylinder will be discharged from the water inlet tank again through the elastic film to achieve backwashing, which further avoids blockage of the water inlet tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention when viewed from above; Figure 3 This is a schematic diagram of the cross-sectional structure of the floating body of the present invention; Figure 4 This is a schematic diagram of the gear ring installation structure of the present invention; Figure 5This is a schematic diagram of the cross-sectional structure of the fixing cylinder of the present invention; Figure 6 This is a schematic diagram of the elastic film installation structure of the present invention; Figure 7 This is a schematic diagram of the installation structure of the sealing rubber block and the rubber water delivery cylinder of the present invention; Figure 8 For the present invention Figure 7 A in the middle is an enlarged structural diagram; Figure 9 This is a schematic diagram of the connection structure between the partition and the drain pipe of the present invention; Figure 10 This is a schematic diagram of the cross-sectional structure of the drainage pipe of the present invention; Figure 11 For the present invention Figure 10 Enlarged structural diagram at point B in the middle.

[0017] In the figure: 1. floating body; 2. fixing cylinder; 3. partition; 4. motor; 5. driving gear; 6. gear ring; 7. first transmission gear; 8. rotating seat; 9. second transmission gear; 10. sealing rubber block; 11. rubber water delivery cylinder; 12. water drawing pipe; 1201. guide groove; 13. drainage pipe; 14. detection module; 15. sample tank; 16. sealing plug; 17. magnetic disc; 18. water outlet pipe; 19. water inlet trough; 20. elastic film; 21. cleaning seat; 2101. ball bearing; 22. flushing water pipe. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Example 1: The existing river water quality detector is inconvenient to perform continuous detection and sampling. In order to solve this technical problem, this embodiment discloses the following technical content, please refer to Figures 1-4 and Figure 9 As shown; A floating river water quality detector for municipal environmental monitoring includes a floating body 1 floating in the 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, and a detection module 14 is installed on the partition 3. In addition, 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 installed 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 to drive the rotating seat 8. It rotates back and forth, and the inner side of the fixed cylinder 2 is connected with a sealing block 10 in an interference sliding manner, and a twisted rubber water delivery cylinder 11 is sealed and fixedly connected between the rotating seat 8 and the sealing block 10, and a water suction pipe 12 and a flushing water pipe 22 are connected through the upper part of the sealing block 10. At the same time, electric control valves are installed on the water suction pipe 12 and the flushing water pipe 22. The center position of the rotating seat 8 is rotatably connected to the drain pipe 13, and a sample tank 15 for collecting samples and an outlet pipe 18 for discharging the flushing water are installed on the partition 3.

[0020] The gear transmission assembly includes a drive gear 5 fixedly mounted on the output end of the motor 4. A gear ring 6 is also rotatably mounted on the inner side of the lower portion of the floating body 1. The drive gear 5 and the gear ring 6 are meshed, and the inner wall of the gear ring 6 is evenly arranged with multiple sets of teeth. A first transmission gear 7 is also rotatably mounted on the inner side of the lower end of the floating body 1. 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. The gear ring 6, through the multiple sets of teeth inside, drives the first transmission gear 7 to rotate, thereby driving the rotating seat 8 to reciprocate elastically. A spring is fixedly connected between the sealing rubber block 10 and the inner wall of the lower end of the fixed tube 2. During the elastic rotation of the rotating seat 8, the twist on the rubber water delivery tube 11 is gradually released. Under the action of the spring force, the sealing rubber block 10 moves downward along the inner wall of the fixed tube 2, thereby stretching the rubber water delivery tube 11. A one-way valve structure is installed on the drain pipe 13. As the rubber water delivery tube 11 returns to its cylindrical shape, water samples are extracted through the water pump pipe 12. The water drawing pipe 12 is telescopically passed 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 . The downward movement of the sealing rubber block 10 drives the water drawing pipe 12 to move downward synchronously to extract water samples at different heights at the same position.

[0021] like Figure 4-Figure 5 、 Figure 7 and Figures 9-11The upper end of the lower part of the drain pipe 13 passes through the detection head of the detection module 14 that is sealed and rotatably connected, and the drain pipe 13 and the detection head of the detection module 14 are coaxially arranged, and the rotating seat 8 twists the rubber water delivery cylinder 11 when it elastically rotates and resets, and pulls the sealing rubber block 10 upward. During the twisting process of the rubber water delivery cylinder 11, water is discharged through the drain pipe 13. The gear ring 6 is fixedly connected to the middle part of the drain pipe 13 through the frame, and the gear ring 6 and the lower part of the drain pipe 13 are coaxially arranged, and the gear ring 6 drives the drain pipe 13 to rotate synchronously during its rotation. 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 tank 15 and the water outlet pipe 18, a positioning hole is provided on the rotating seat 8, and the sample tank 15 is interference fit in the positioning hole, and a water inlet is provided at the lower end of the sample tank 15, and at the same time, a truncated cone-shaped sealing plug 16 for sealing is elastically connected to the water inlet through a spring, the lower end of the sealing plug 16 is made of magnetic material, and a magnetic piece 17 is fixedly provided in the upper port of the drain pipe 13, and when the upper part of the drain pipe 13 is rotated to below the positioning hole, it is sealed and fitted to the lower surface of the partition 3, and the sealing plug 16 is elastically moved downward under the action of the magnetic material at its lower end and the magnetic force of the magnetic piece 17 to open the water inlet.

[0022] The floating body 1 is placed in the river water, and the propulsion mechanism is controlled to move. When it moves to the detection point, the motor 4 is controlled to drive the driving gear 5 and the gear ring 6 to engage, thereby driving the gear ring 6 to rotate, so that the tooth block inside the gear ring 6 engages with the first transmission gear 7, and the first transmission gear 7 engages with the second transmission gear 9 to drive the rotating seat 8 to rotate elastically, which can gradually release the twisting of the rubber water delivery cylinder 11 by the rotating seat 8, so that the sealing block 10 moves downward under the action of the spring force, so that the sealing block 10 stretches the rubber water delivery cylinder 11 and opens the valve on the water drawing pipe 12 at the same time, so that the rubber water delivery cylinder 11 can extract water from the river through the water drawing pipe 12, and the water drawing pipe 12 will move downward synchronously with the sealing block 10, thereby realizing sampling of water bodies at different heights at the same position, avoiding detection errors caused by single sampling. When the first transmission gear 7 is located between the two sets of tooth blocks on the inner side of the gear ring 6, the rotating seat 8 will elastically rotate and reset, which can twist the rubber water delivery cylinder 11 again, so that the rubber water delivery cylinder 11 can transport the water sample extracted 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 below the sample tank 15, the sealing plug 16 in the water inlet hole at the lower end of the sample tank 15 will be elastically moved downward under the magnetic force of the magnetic piece 17 at the upper end of the drain pipe 13, thereby opening the water inlet hole. At this time, the water sample in the drain pipe 13 will enter the sample tank 15 through the water inlet hole. When the positions of the drain pipe 13 and the sample tank 15 are staggered, the sealing plug 16 will block the water inlet hole at the lower end of the sample tank 15, which is convenient for subsequent removal of the sample water.

[0023] Example 2: The technical content disclosed in this embodiment is a further improvement based on the above-mentioned Example 1. The existing floating river water quality detector is inconvenient to clean the pipeline after the test is completed, which easily affects the subsequent test accuracy. In order to further solve this technical problem, this embodiment discloses the following technical content, such as Figure 3 and Figure 5-Figure 8 As shown; a water inlet groove 19 is provided at the lower end of the fixed cylinder 2, and a purification component is installed on the inner side of the water inlet groove 19, and an elastic film 20 is installed on the upper end of the water inlet groove 19. The elastic film 20 is arranged to form two rubber ring structures that fit each other, and the elastic film 20 elastically deforms under the action of pressure during the up and down movement of the sealing rubber block 10 to realize the opening and closing of the water inlet groove 19, and 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 drawing pipe 12, and a ball 2101 is embedded in the inner wall of the cleaning seat 21, and a spiral guide groove 1201 is provided on the outer wall of the water drawing pipe 12. When the water drawing pipe 12 is raised and lowered, the ball 2101 rolls along the guide groove 1201 to drive the cleaning seat 21 to rotate, and a brush body that fits the filter hole at the lower end of the water inlet groove 19 is fixedly provided on the outside of the cleaning seat 21.

[0024] During a single sampling, since the valve on the flushing water pipe 22 is closed, when the sealing rubber block 10 moves upward, the elastic film 20 will be elastically deformed under the action of negative pressure, so that the water inlet trough 19 can extract the filtered river water and store it in the fixed cylinder 2. When the sampling is completed, the valve on the flushing water pipe 22 is opened, and the sealing rubber block 10 is controlled to reset. The purified river water extracted from the inside of the fixed cylinder 2 will enter 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 is realized to ensure the accuracy of the next detection. As the water-drawing pipe 12 is raised and lowered, the ball 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, so that the cleaning seat 21 can automatically clean the filter holes of the water inlet tank 19 to avoid blockage. When the valve on the flushing water pipe 22 is closed, as the sealing rubber block 10 moves downward, the river water sucked into the inner side of the fixed cylinder 2 will be discharged from the water inlet tank 19 again through the elastic film 20, realizing backflushing and further avoiding blockage of the water inlet tank 19.

[0025] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0026] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. 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. A floating river water quality detector for municipal environmental monitoring, comprising a floating body (1) floating in a river, wherein a fixed cylinder (2) for sampling is fixedly mounted on the lower end of the floating body (1), a partition (3) is fixedly mounted on the inner side of the floating body (1), a detection module (14) is mounted on the partition (3), and a motor (4) for driving sampling is also fixedly mounted on the inner side of the floating body (1); It is characterized by: The upper end of the fixed cylinder (2) is elastically rotatably mounted with a rotating seat (8), and the output end of the motor (4) and the rotating seat (8) are connected by a gear transmission assembly to drive the rotating seat (8) to rotate back and forth. The inner side of the fixed cylinder (2) is connected to a sealing rubber block (10) in an interference sliding manner, and a twisted rubber water delivery cylinder (11) is sealed and fixedly connected between the rotating seat (8) and the sealing rubber block (10), and a water drawing pipe (12) and a flushing water pipe are connected through the upper end of the sealing rubber block (10). The water pipe (22) is provided with an electric control valve on both the water drawing pipe (12) and the flushing water pipe (22). The center position of the rotating seat (8) is rotatably connected to the drain pipe (13). The partition (3) is provided with a sample tank (15) for collecting samples and a water outlet pipe (18) for discharging the flushing water. 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 film (20) is installed on the upper end of the water inlet groove (19).

2. The floating river water quality detector for municipal environmental monitoring according to claim 1, characterized in that: The gear transmission assembly comprises a driving gear (5) fixedly mounted on the output end of the motor (4); a gear ring (6) is rotatably mounted on the inner side of the lower portion of the floating body (1); the driving gear (5) and the gear ring (6) are meshed and connected, and a plurality of groups 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 inner side of the lower end of the floating body (1); 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 and connected, and the gear ring (6) drives the first transmission gear (7) to rotate through the plurality of groups of tooth blocks on the inner side thereof, so as to drive the rotating seat (8) to perform reciprocating elastic rotation.

3. The floating river water quality detector for municipal environmental monitoring according to claim 1, characterized in that: A spring is fixedly connected between the sealing rubber block (10) and the inner wall of the lower end of the fixed cylinder (2), and the twisting of the rubber water delivery cylinder (11) is gradually released during the elastic rotation of the rotating seat (8), and the sealing rubber block (10) moves downward along the inner wall of the fixed cylinder (2) under the action of the spring elastic force, thereby stretching the rubber water delivery cylinder (11). At the same time, a one-way valve structure is installed on the drainage pipe (13), and water samples are extracted through the water drawing pipe (12) during the process of the rubber water delivery cylinder (11) returning to a cylindrical shape.

4. The floating river water quality detector for municipal environmental monitoring according to claim 3 is characterized by: The water drawing pipe (12) is telescopically extended 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). When the sealing rubber block (10) moves downward, the water drawing pipe (12) is driven to move downward synchronously, so as to extract water samples at different heights at the same position.

5. The floating river water quality detector for municipal environmental monitoring according to claim 3 is characterized by: The upper end of the lower portion of the drain pipe (13) passes through the detection head of the detection module (14) and is connected in a sealed rotation manner. The drain pipe (13) and the detection head of the detection module (14) are coaxially arranged. When the rotating seat (8) elastically rotates and resets, it twists the rubber water delivery cylinder (11) and pulls the sealing rubber block (10) upward. During the twisting process of the rubber water delivery cylinder (11), water is drained through the drain pipe (13).

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

7. The floating river water quality detector for municipal environmental monitoring according to claim 6, characterized in that: A positioning hole is provided on the rotating seat (8), and a sample tank (15) is provided in the positioning hole through interference fit, and a water inlet is provided at the lower end of the sample tank (15), and a truncated cone-shaped sealing plug (16) for sealing is elastically connected to the water inlet through a spring, 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), and when the upper part of the drain pipe (13) rotates to below the positioning hole, it is sealed against the lower surface of the partition (3), and the sealing plug (16) is elastically moved downward under the magnetic force of the magnetic material at its lower end and the magnetic sheet (17) to open the water inlet.

8. The floating river water quality detector for municipal environmental monitoring according to claim 1, characterized in that: The elastic film (20) is configured as two rubber ring structures that fit together, and during the upward and downward movement of the sealing rubber block (10), the elastic film (20) undergoes elastic deformation under the action of pressure, thereby realizing the opening and closing of the water inlet groove (19).

9. The floating river water quality detector for municipal environmental monitoring according to claim 4, characterized in that: 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 outer side of the water drawing pipe (12), and a ball (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 drawing pipe (12). When the water drawing pipe (12) is raised or lowered, the ball (2101) rolls along the guide groove (1201) to drive the cleaning seat (21) to rotate. A brush body is fixedly provided on the outer side of the cleaning seat (21) and is fitted to the filter hole at the lower end of the water inlet trough (19).

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