A water pollution monitoring sampling device and its use method

Abstract

The present invention relates to the technical field of water pollution monitoring and sampling, and specifically to a water pollution monitoring and sampling device and a method of use, comprising a float and a driving assembly, wherein the float is a ship-shaped structure, the driving assembly is installed on the float, and the driving assembly is used to drive the float to move on the water surface. The device also comprises a sampling assembly, a positioning assembly and a floating assembly, wherein the sampling assembly comprises a sampling tank, which is detachably connected to the float, and the positioning assembly comprises a cable, an anchor and a winding mechanism, one end of the cable is mounted on the float through the winding mechanism, the cable passes through the kettle body and is slidably connected thereto, and the top of the anchor is fixedly connected to the other end of the cable. In order to facilitate use in bad weather, the present invention arranges the device in advance in the target water area when the weather is good, and submerges the sampling tank by the rapid rise of the water level during heavy rainfall, so that water flows into the sampling tank, thereby completing the sampling work, avoiding the safety risks posed to workers when performing water pollution monitoring and sampling in bad weather.

Description

Technical Field

[0001] The present invention relates to the technical field of water pollution monitoring and sampling, and in particular to a water pollution monitoring and sampling device and a use method thereof. Background Art

[0002] Water pollution is the deterioration or loss of water's usefulness caused by harmful chemicals, which pollutes the environment. Acids, alkalis, oxidants, compounds like copper, cadmium, mercury, and arsenic, and organic toxins like benzene, ethylene dichloride, and ethylene glycol in sewage can poison aquatic life, affecting drinking water sources and scenic landscapes. Microbial decomposition of organic matter in sewage consumes oxygen, impacting aquatic life. Once dissolved oxygen is depleted, the organic matter undergoes anaerobic decomposition, producing unpleasant gases like hydrogen sulfide and mercaptans, further deteriorating water quality.

[0003] Water pollution monitoring is the process of monitoring and measuring the types of pollutants in water bodies, their concentrations and changing trends, and evaluating water quality. The scope of water pollution monitoring is very broad, including unpolluted and polluted natural water and various industrial wastewaters. During the monitoring process, a sampling device is required to collect samples from the target water body. Most water pollution monitoring sampling devices in the existing technology achieve sampling by sinking a container into the target water body and allowing water to flow into the container. The disadvantage of this solution is that its use scenarios are severely limited, requiring staff to perform certain operations on site, and is not convenient for use in bad weather.

[0004] During heavy rainstorms, urban sewage is washed into rivers and other natural water bodies, causing damage to the aquatic environment. Furthermore, during disasters such as floods, sewage can be contaminated with large amounts of sediment and garbage, necessitating monitoring and sampling of polluted water bodies for purification and maintenance after the floods recede. However, inclement weather makes it difficult for workers to operate existing water pollution monitoring and sampling equipment on-site, resulting in untimely monitoring and impacting the purification and protection of water resources.

[0005] For example, a device and method for predicting and warning the ecological risk of sudden water pollution in a drinking water source with Chinese patent publication number CN116754736A relates to the field of water pollution monitoring technology, includes a device shell and a water quality monitoring center, and also includes driving floats symmetrically arranged on both sides of the device shell, for driving the device to travel in the water body of the water source; a steering component connected to the two driving floats in the device shell is used to adjust the direction of the driving float to achieve the steering of the device; a monitoring sampling cylinder wirelessly connected to the water quality monitoring center at the lower end of the device shell is used to sample and monitor the water body of the water source; although this solution can realize the flexible operation process of water body movement, sampling monitoring and sampling, it cannot solve the above-mentioned problem and realize water body sampling in severe weather, which needs to be improved. Summary of the Invention

[0006] The purpose of the present invention is to provide a water pollution monitoring sampling device and a method of use, which can perform sampling work without the need for on-site operation by staff, thereby being convenient for use in bad weather and having high practicality.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] A water pollution monitoring and sampling device is provided, comprising a float and a drive assembly, wherein the float is a ship-shaped structure, the drive assembly is mounted on the float, and is used to drive the float to move on the water surface, and further comprises a sampling assembly, a positioning assembly and a floating assembly, wherein the sampling assembly comprises a sampling tank, which is detachably connected to the float, the positioning assembly comprises a cable, an anchor and a winding mechanism, one end of the cable is mounted on the float through the winding mechanism, the cable passes through a kettle body and is slidably connected thereto, and the top of the anchor is fixedly connected to the other end of the cable, the floating assembly comprises a plurality of airbags and a buoyancy adjustment mechanism, the plurality of airbags are respectively distributed at the four corners of the float, the airbags are vertically slidably mounted on the float, the buoyancy adjustment mechanism is mounted on the float, and the buoyancy adjustment mechanism is used to adjust the buoyancy of the airbags.

[0009] Preferably, the sampling assembly also includes a piston plate, a cover plate and a float. The piston plate is slidably connected to the inner wall of the sampling tank. A plurality of penetrating circular holes are provided on the top of the piston plate and the top of the sampling tank. The circular holes on the piston plate and the circular holes on the sampling tank are staggered. The bottom of the cover plate passes through the top wall of the sampling tank and is fixedly connected to the top of the piston plate. The top of the cover plate is fixedly connected to the bottom of the float.

[0010] Preferably, a threaded ring is fixedly connected to the top of the float, a threaded groove is provided at the bottom of the outer periphery of the sampling tank, and the threaded groove is threadedly connected to the inner wall of the threaded ring.

[0011] Preferably, the floating assembly also includes multiple T-shaped slide bars and thrust springs, the bottoms of the multiple T-shaped slide bars are fixedly connected to the two sides of the float respectively, the outer periphery of the T-shaped slide bars is slidably connected to the airbag, one end of the thrust spring is fixedly connected to the top of the T-shaped slide bar, and the other end of the thrust spring is fixedly connected to the top of the airbag.

[0012] Preferably, the winding mechanism includes a winding drum and a waterproof motor, the bottom of the winding drum is fixedly connected to the top of the float, one end of the cable is fixedly connected to the side wall of the rotating shaft of the winding drum, the cable is wound around the outer periphery of the rotating shaft of the winding drum, one side of the waterproof motor is fixedly connected to the winding drum, and the output shaft of the waterproof motor passes through the side wall of the winding drum and is coaxially connected to the rotating shaft of the winding drum.

[0013] Preferably, the winding mechanism also includes a marking balloon, a first hose, a support plate and a circular tube. The bottom of the support plate is fixedly connected to the top of the float. One end of the circular tube is coaxially connected to the rotating shaft of the winding reel. The other end of the circular tube passes through the support plate and is rotatably connected to it. The first hose is wrapped around the outer periphery of the circular tube, and one end of the first hose is connected to the marking balloon.

[0014] Preferably, the buoyancy adjustment mechanism includes multiple second hoses, multiple air pipes and a fan, one end of the second hose is connected to the top of the airbag, and the other end of the second hose is connected to the air pipe. The air pipe is used to connect the hose to the air inlet of the fan, and the air outlet of the fan is connected to the other end of the first hose. The first hose passes through the side wall of the circular tube and is rotatably connected to it.

[0015] Preferably, the drive assembly includes a propeller and a rudder blade, the propeller is rotatably connected to one end of the bottom of the float, the rudder blade is located at the end of the propeller away from the float, and the top of the shaft of the rudder blade is rotatably connected to the float.

[0016] The present invention also provides a method for using a water pollution monitoring and sampling device, which is applied to the above-mentioned water pollution monitoring and sampling device, and includes the following steps: S1, placing the water pollution monitoring and sampling device in a natural water body, adjusting the buoyancy of the airbag to the maximum through the buoyancy adjustment mechanism, and making the drive component work to move the float to the target water area, S2, starting the waterproof motor to lower the anchor to the bottom of the water, and then reducing the buoyancy of the airbag through the buoyancy adjustment mechanism, so that the float can be fixed in the target water area, S3, when the water level rises and submerges the float and the sampling tank, the float floats up to open the sampling tank and sample the water body, S4, the airbag delays the T-shaped slide bar to move up when the water level rises to ensure that the float remains stable in the water body, S5, reaching the target water area to find the marking balloon, recover the float and remove the sampling tank to complete the sampling.

[0017] Beneficial effects of the present invention:

[0018] 1. The present invention can freely adjust the buoyancy of the float by setting up the air bag and buoyancy adjustment mechanism. In conjunction with the anchor and drive assembly, the float can be freely moved and positioned in the water, so that the sampling tank can be deployed in the target waters in advance without the need for staff to operate at the sampling site.

[0019] 2. The present invention utilizes the phenomenon of rapid water level rise during heavy rainfall to flood the sampling tank, and opens the sampling tank through the buoyancy provided by the float, thereby realizing automatic sampling in severe weather and avoiding the safety risks posed to workers when conducting water pollution monitoring sampling in severe weather. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention Figure 1 .

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention Figure 2 .

[0023] Figure 3 It is a schematic diagram of the floating structure of the present invention.

[0024] Figure 4 It is a schematic structural diagram of the sampling tank of the present invention.

[0025] Figure 5 It is a structural exploded view of the winding mechanism of the present invention.

[0026] Figure 6 It is a cross-sectional view of the cylindrical structure of the present invention.

[0027] Figure 7 This is a structural exploded view of the buoyancy adjustment mechanism of the present invention.

[0028] Figure 8 It is a schematic diagram of the airbag structure of the present invention.

[0029] In the picture:

[0030] 1. Floating body; 10. Threaded ring;

[0031] 2. Drive assembly; 20. Propeller; 21. Rudder blade;

[0032] 3. Sampling assembly; 30. Sampling tank; 300. Threaded groove; 31. Piston plate; 310. Round hole; 32. Cover plate; 33. Float;

[0033] 4. Positioning assembly; 40. Cable; 41. Anchor; 42. Winding mechanism; 420. Winding drum; 421. Waterproof motor; 422. Marking balloon; 423. First hose; 424. Support plate; 425. Round tube;

[0034] 5. Floating assembly; 50. Airbag; 51. Buoyancy adjustment mechanism; 510. Second hose; 511. Air pipe; 512. Fan; 52. T-shaped slide bar; 53. Thrust spring. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0036] Among them, the drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting this patent; in order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0037] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inside", "outside" and the like indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0038] In the description of the present invention, unless otherwise expressly specified or limited, when the term "connection" or the like appears to indicate a connection relationship between components, such term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be internal communication between two components or an interaction between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood in specific circumstances.

[0039] like Figures 1 to 8 As shown:

[0040] A water pollution monitoring and sampling device includes a float 1 and a drive assembly 2. The float 1 is a boat-shaped structure that facilitates movement on the water surface. The drive assembly 2 is mounted on the float 1 and is used to drive the float 1 on the water surface. The device also includes a sampling assembly 3, a positioning assembly 4, and a floating assembly 5. The sampling assembly 3 includes a sampling canister 30, which is detachably connected to the float 1, allowing for easy removal and transfer of the sample after sampling. The positioning component 4 includes a cable 40, an anchor 41 and a winding mechanism 42. One end of the cable 40 is installed on the floating body 1 through the winding mechanism 42. The cable 40 passes through the kettle body and is slidably connected to it. The top of the anchor 41 is fixedly connected to the other end of the cable 40. The floating component 5 includes multiple air bags 50 and a buoyancy adjustment mechanism 51. The multiple air bags 50 are distributed at the four corners of the floating body 1. The air bags 50 can be vertically slidably installed on the floating body 1. The buoyancy adjustment mechanism 51 is installed on the floating body 1. The buoyancy adjustment mechanism 51 is used to adjust the buoyancy of the air bags 50. During water pollution monitoring and sampling, the buoyancy of the multiple airbags 50 is increased to a maximum through the buoyancy adjustment mechanism 51. The float 1 is then placed in a natural body of water. The buoyancy provided by the airbags 50 is now greater than the weight of the anchor 41, causing the float 1 to float on the water surface. The drive assembly 2 moves the float 1 to the target water area. The reeling mechanism 42 then releases the cable 40, causing the anchor 41 to sink to the bottom of the water. The buoyancy of the airbags 50 is then reduced through the buoyancy adjustment mechanism 51. The float 1 now floats on the target water surface under the positioning of the anchor 41, thus completing the placement of the water pollution monitoring and sampling device. When heavy rainfall occurs, the water level of the natural body of water rises rapidly. As the water level deepens, the float 1 floats up. When the cable 40 is straightened, the water gradually submerges the float 1 and the sampling tank 30. The float 1 now floats in the water, and the water flows into the sampling tank 30, completing the sampling process. The device can be deployed in the target water area in advance when the weather conditions are good, and automatically samples the water in the target water area when heavy rain or flooding occurs, thereby avoiding the safety risks of workers when conducting water pollution monitoring sampling in bad weather.

[0041] like Figures 1 to 4 As shown:

[0042] The sampling assembly 3 also includes a piston plate 31, a cover plate 32 and a float 33. The piston plate 31 is slidably connected to the inner wall of the sampling tank 30. A plurality of penetrating circular holes 310 are provided on the top of the piston plate 31 and the top of the sampling tank 30. The circular holes 310 on the piston plate 31 and the circular holes 310 on the sampling tank 30 are staggered. The bottom of the cover plate 32 passes through the top wall of the sampling tank 30 and is fixedly connected to the top of the piston plate 31. The top of the cover plate 32 is fixedly connected to the bottom of the float 33. When the float 1 floats on the water surface, the bottom of the cover plate 32 and the top of the sampling tank 30 fit together to seal the sampling tank 30. When the water surface submerges the sampling tank 30, the float 33 drives the cover plate 32 and the piston plate 31 to move upward under the action of buoyancy, and the water flows into the sampling tank 30 through the circular hole 310. As the water level rises, the sampling tank 30 is filled. At this time, the top of the piston plate 31 and the top wall of the sampling tank 30 fit together. Since the positions of the circular holes 310 on the two are staggered, the sampling tank 30 is closed at this time, thereby automatically completing the sampling operation when the water level rises.

[0043] like Figures 1 to 4 As shown:

[0044] The top of the float 1 is fixedly connected to a threaded ring 10, and the bottom of the outer periphery of the sampling tank 30 is provided with a threaded groove 300, which is threadedly connected to the inner wall of the threaded ring 10. The threaded connection achieves the purpose of detaching the sampling tank 30, which is convenient for transferring the sample after sampling is completed.

[0045] like Figures 1 to 8 As shown:

[0046] The float assembly 5 also includes a plurality of T-shaped slide bars 52 and a thrust spring 53. The bottoms of the T-shaped slide bars 52 are fixedly connected to the sides of the float 1. The outer periphery of the T-shaped slide bars 52 is slidably connected to the airbag 50. One end of the thrust spring 53 is fixedly connected to the top of the T-shaped slide bars 52, and the other end of the thrust spring 53 is fixedly connected to the top of the airbag 50. When the float 1 floats on the water surface, the thrust provided by the thrust spring 53 squeezes the airbag 50 to the bottom of the two sides of the float 1, allowing the float 1 to float stably on the water surface and prevent it from capsizing. When the water level submerges the float 1, the cable 40 is straightened. Under the action of the buoyancy, the airbag 50 moves upward along the T-shaped slide bars 52, and the thrust spring 53 is compressed, causing the airbag 50 to move above the float 1. The buoyancy of the airbag 50 pulls the float 1 upward, while the gravity of the anchor 41 pulls the float 1 downward, allowing the float 1 to float stably in the water and prevent it from capsizing.

[0047] like Figures 1 to 6 As shown:

[0048] The winding mechanism 42 includes a winding drum 420 and a waterproof motor 421. The bottom of the winding drum 420 is fixedly connected to the top of the floating body 1. One end of the cable 40 is fixedly connected to the side wall of the rotating shaft of the winding drum 420. The cable 40 is wound around the outer periphery of the rotating shaft of the winding drum 420. One side of the waterproof motor 421 is fixedly connected to the winding drum 420. The output shaft of the waterproof motor 421 passes through the side wall of the winding drum 420 and is coaxially connected to the rotating shaft of the winding drum 420. When the waterproof motor 421 is powered on, its output shaft drives the rotating shaft of the main winding drum 420 to rotate, thereby reeling and unreeling the cable. The length of the unreeled cable can also be used to control the timing of water sampling, allowing the water pollution monitoring sampling device to sample the water when the water level exceeds the warning water level.

[0049] like Figures 1 to 6 As shown:

[0050] The reeling mechanism 42 also includes a marker balloon 422, a first hose 423, a support plate 424, and a circular tube 425. The bottom of the support plate 424 is fixedly connected to the top of the float 1. One end of the circular tube 425 is coaxially connected to the rotating shaft of the winding drum 420. The other end of the circular tube 425 passes through the support plate 424 and is rotatably connected thereto. The first hose 423 is wound around the outer periphery of the circular tube 425, and one end of the first hose 423 is connected to the marker balloon 422. When the cable is extended, the first hose 423 is also extended. When the water submerges the float 1, the marker balloon 422 can float out of the float 1, making it easier for staff to recover and locate the water pollution monitoring and sampling device.

[0051] like Figures 1 to 7 As shown:

[0052] The buoyancy adjustment mechanism 51 includes multiple second hoses 510, multiple air tubes 511, and a fan 512. One end of the second hose 510 is connected to the top of the airbag 50, and the other end is connected to the air tube 511. The air tube 511 connects the hose to the air inlet of the fan 512. The air outlet of the fan 512 is connected to the other end of the first hose 423. The first hose 423 passes through the side wall of the circular tube 425 and is rotatably connected thereto. After the float 1 moves to the target waters, the fan 512 is activated, and air is extracted from the airbag 50 through the first hose 423 and air tube 511. The air is then injected into the marker balloon 422 through the second hose 510. This reduces the buoyancy of the airbag 50, preventing the float 1 from drifting away from the target waters. It also causes the marker balloon 422 to inflate, making it easier to find.

[0053] like Figures 1 to 7 As shown:

[0054] Drive assembly 2 includes a propeller 20 and a rudder blade 21. Propeller 20 is rotatably connected to one end of the bottom of buoy 1. Rudder blade 21 is located at the end of propeller 20 away from buoy 1. The top of the shaft of rudder blade 21 is rotatably connected to buoy 1. Rotation of propeller 20 propels buoy 1 forward, while rotation of rudder blade 21 controls its direction, allowing buoy 1 to be moved to the target area for easier deployment.

[0055] like Figures 1 to 8 As shown:

[0056] This embodiment also provides a method for using a water pollution monitoring and sampling device, which is applied to the above-mentioned water pollution monitoring and sampling device, including the following steps: S1. Place the water pollution monitoring and sampling device in a natural water body, adjust the buoyancy of the airbag 50 to the maximum through the buoyancy adjustment mechanism 51, and make the drive component 2 work to move the float 1 to the target water area, S2. Start the waterproof motor 421 to lower the anchor 41 to the bottom of the water, and then reduce the buoyancy of the airbag 50 through the buoyancy adjustment mechanism 51 to fix the float 1 in the target water area, S3. When the water level rises and submerges the float 1 and the sampling tank 30, the float 33 floats up to open the sampling tank 30 and sample the water body, S4. When the water level rises, the airbag 50 delays the T-shaped slide bar 52 from moving up to ensure that the float 1 remains stable in the water body, S5. Arrive at the target water area and find the marking balloon 422, recover the float 1 and remove the sampling tank 30 to complete the sampling.

[0057] It should be noted that the above-described specific embodiments are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that various modifications, equivalent substitutions, and variations may be made to the present invention. However, as long as these modifications do not depart from the spirit of the present invention, they are intended to be within the scope of protection of the present invention. Furthermore, certain terms used in the specification and claims of this application are not intended to be limiting; they are intended solely to facilitate a clear description of the positional relationships and functions of various components.

Claims

1. A water pollution monitoring and sampling device, comprising a float (1) and a drive assembly (2), wherein the float (1) is a ship-shaped structure, the drive assembly (2) is mounted on the float (1), and the drive assembly (2) is used to drive the float (1) to move on the water surface, characterized in that: The invention also includes a sampling component (3), a positioning component (4) and a floating component (5), wherein the sampling component (3) includes a sampling tank (30), the sampling tank (30) is detachably connected to the floating body (1), the positioning component (4) includes a cable (40), an anchor (41) and a reeling mechanism (42), one end of the cable (40) is mounted on the floating body (1) through the reeling mechanism (42), the cable (40) passes through the floating body (1) and is slidably connected thereto, the top of the anchor (41) is fixedly connected to the other end of the cable (40), the floating component (5) includes a plurality of air bags (50) and a buoyancy adjustment mechanism (51), the plurality of air bags (50) are respectively distributed at the four corners of the floating body (1), the air bags (50) are vertically slidably mounted on the floating body (1), the buoyancy adjustment mechanism (51) is mounted on the floating body (1), and the buoyancy adjustment mechanism (51) is used to adjust the buoyancy of the air bags (50); The floating assembly (5) further includes a plurality of T-shaped slide bars (52) and a thrust spring (53), wherein the bottoms of the plurality of T-shaped slide bars (52) are fixedly connected to both sides of the float (1), the periphery of the T-shaped slide bars (52) is slidably connected to the airbag (50), one end of the thrust spring (53) is fixedly connected to the top of the T-shaped slide bar (52), and the other end of the thrust spring (53) is fixedly connected to the top of the airbag (50); The winding mechanism (42) includes a winding drum (420) and a waterproof motor (421), the bottom of the winding drum (420) is fixedly connected to the top of the floating body (1), one end of the cable (40) is fixedly connected to the side wall of the rotating shaft of the winding drum (420), the cable (40) is wound around the outer periphery of the rotating shaft of the winding drum (420), one side of the waterproof motor (421) is fixedly connected to the winding drum (420), and the output shaft of the waterproof motor (421) passes through the side wall of the winding drum (420) and is coaxially connected to the rotating shaft of the winding drum (420); The reeling mechanism (42) further comprises a marking balloon (422), a first hose (423), a support plate (424) and a circular tube (425), wherein the bottom of the support plate (424) is fixedly connected to the top of the float (1), one end of the circular tube (425) is coaxially connected to the rotating shaft of the winding drum (420), the other end of the circular tube (425) passes through the support plate (424) and is rotatably connected thereto, the first hose (423) is wound around the outer periphery of the circular tube (425), and one end of the first hose (423) is in communication with the marking balloon (422); The buoyancy adjustment mechanism (51) includes a plurality of second hoses (510), a plurality of air pipes (511) and a fan (512), one end of the second hose (510) is connected to the top of the air bag (50), the other end of the second hose (510) is connected to the air pipe (511), the air pipe (511) is used to connect the second hose (510) to the air inlet of the fan (512), the air outlet of the fan (512) is connected to the other end of the first hose (423), and the first hose (423) passes through the side wall of the circular tube (425) and is rotatably connected thereto; The sampling assembly (3) further includes a piston plate (31), a cover plate (32) and a float (33). The piston plate (31) is slidably connected to the inner wall of the sampling tank (30). The top of the piston plate (31) and the top of the sampling tank (30) are both provided with a plurality of penetrating circular holes (310). The circular holes (310) on the piston plate (31) and the circular holes (310) on the sampling tank (30) are staggered. The bottom of the cover plate (32) passes through the top wall of the sampling tank (30) and is fixedly connected to the top of the piston plate (31). The top of the cover plate (32) is fixedly connected to the bottom of the float (33).

2. A water pollution monitoring sampling device according to claim 1, characterized in that: A threaded ring (10) is fixedly connected to the top of the float (1), and a threaded groove (300) is provided at the bottom of the outer periphery of the sampling tank (30), and the threaded groove (300) is threadedly connected to the inner wall of the threaded ring (10).

3. A water pollution monitoring sampling device according to claim 1, characterized in that: The driving assembly (2) includes a propeller (20) and a rudder blade (21), wherein the propeller (20) is rotatably connected to one end of the bottom of the floating body (1), and the rudder blade (21) is located at the end of the propeller (20) away from the floating body (1), and the top of the shaft of the rudder blade (21) is rotatably connected to the floating body (1).

4. A method for using a water pollution monitoring sampling device according to claim 1, characterized in that: The following steps are involved: S1. Place the water pollution monitoring sampling device in a natural water body, adjust the buoyancy of the air bag (50) to a maximum through the buoyancy adjustment mechanism (51), and operate the driving component (2) to move the float (1) to the target water area; S2, starting the waterproof motor (421) to lower the anchor (41) to the bottom of the water, and then reducing the buoyancy of the air bag (50) through the buoyancy adjustment mechanism (51), so as to fix the float (1) in the target water area; S3, when the water level rises and submerges the floating body (1) and the sampling tank (30), the float (33) floats up to open the sampling tank (30) and sample the water; S4, the air bag (50) moves upward along the T-shaped slide bar (52) when the water level rises, ensuring that the floating body (1) remains stable in the water; S5. Arrive at the target waters, find the marking balloon (422), recycle the float (1) and remove the sampling tank (30) to complete the sampling.

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