A water environment ecological monitoring and sampling device

Abstract

This invention belongs to the field of water environment monitoring and sampling technology, specifically disclosing a water environment ecological monitoring and sampling device, including a constant-level frame, a sampling unit, a water pressure triggering mechanism, a counterweight, and a lifting cable. This invention achieves precise preset trigger pressure through the coordination of an adjusting nut and a spring, allowing for flexible adjustment of the sampling depth as needed. Simultaneously, the guiding structure of the engaging protrusion and limiting groove ensures a smooth and reliable triggering process. In particular, the self-locking mechanism with a locking tongue and locking groove reliably locks the piston body after sampling, uniquely solving the technical problem of water sample loss due to water pressure changes during the lifting process. This ensures the accuracy and integrity of the collected water samples, significantly improving the sampling quality and work efficiency of water environment monitoring.

Description

Technical Field

[0001] This invention belongs to the field of water environment monitoring and sampling technology, specifically referring to a water environment ecological monitoring and sampling device. Background Technology

[0002] Aquatic environment ecological monitoring is a crucial foundation for ecological environmental protection and water resource management. Accurate sampling of water at different depths is a key step in assessing water quality, analyzing the vertical distribution of pollutants, and studying the structure of aquatic ecosystems. Currently, commonly used water sampling devices include simple water samplers, fixed-depth water samplers, and some complex sampling equipment controlled by electric or pneumatic mechanisms.

[0003] However, existing technologies still have the following technical shortcomings in practical applications: 1. Poor convenience and accuracy of depth control: Some simple water samplers rely heavily on operators' experience or rough markings on the cable to determine the descent depth. In complex aquatic environments with water flow disturbances or cable tilting, this manual judgment method may further compromise the ease of operation and accuracy of depth control, potentially affecting the representativeness of the collected water samples at the vertical level.

[0004] 2. Risk of sample loss: In some existing self-triggered sampling devices, during the process of completing sampling and pulling upwards, as the water pressure gradually decreases, the internal reset spring of the device may push the piston in the opposite direction due to the elastic force being greater than the external water pressure. This causes some or all of the collected water sample to be squeezed out, resulting in sample loss or mixing with water samples from non-target depths, which seriously affects the accuracy and reliability of the sampling results.

[0005] 3. Complex adjustment operation: For devices that need to adapt to sampling at different depths, the adjustment structure of the trigger pressure is often complex in design, inconvenient to operate, and difficult to achieve quick and flexible adjustment in the field.

[0006] Therefore, how to provide a water environment ecological monitoring sampling device that can achieve different depth control, stable triggering action, and effectively prevent sample loss after sampling is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0007] To address the above issues and overcome the shortcomings of existing technologies, this invention provides a water environment ecological monitoring sampling device. By adjusting the cooperation between the nut and the spring, the trigger pressure is precisely preset, allowing the sampling depth to be flexibly adjusted according to needs. Simultaneously, the guiding structure of the engaging protrusion and the limiting groove ensures a smooth and reliable triggering process. In particular, the self-locking mechanism with a locking tongue and locking groove reliably locks the piston body after sampling, uniquely solving the technical problem of water sample loss due to water pressure changes during the lifting process. This ensures the accuracy and integrity of the collected water samples, significantly improving the sampling quality and work efficiency of water environment monitoring.

[0008] The technical solution adopted by this invention is as follows: This invention provides a water environment ecological monitoring sampling device, including a constant-level frame, a sampling unit, a water pressure triggering mechanism, a counterweight, and a lifting cable. The sampling unit is disposed in the constant-level frame, the water pressure triggering mechanism is disposed on the constant-level frame and connected to the sampling unit, the counterweight is disposed at the bottom end of the constant-level frame, and the lifting cable is disposed on the constant-level frame. The water pressure triggering mechanism includes a trigger plate, an elastic adjustable depth calibration component, and a limiting plate. The trigger plate is engaged and slidably disposed in the constant-level frame, the elastic adjustable depth calibration component is threadedly connected to the trigger plate, the elastic adjustable depth calibration component is telescopically slidably disposed in the constant-level frame, and the limiting plate is connected to the elastic adjustable depth calibration component.

[0009] Furthermore, the trigger plate is provided with threaded holes, and the outer circumferential wall of the trigger plate is provided with engaging protrusions.

[0010] Preferably, the elastic adjustable depth calibration component includes an elastic adjusting screw, an adjusting nut, and a spring. The elastic adjusting screw is threadedly connected to a threaded hole, and the adjusting nut is threadedly connected to the elastic adjusting screw. The adjusting nut is located below the trigger plate, and the spring is sleeved on the outside of the elastic adjusting screw. The constant level frame has a pressure chamber. One end of the spring is located on the inner upper wall of the pressure chamber, and the other end of the spring is located on the trigger plate.

[0011] Furthermore, the sampling unit includes a sampling cylinder, a sampling rod, and a self-locking sampling piston. The sampling cylinder is disposed in a constant-level frame, the self-locking sampling piston is movably disposed in the sampling cylinder, one end of the sampling rod passes through the sampling cylinder and is connected to the self-locking sampling piston, and the other end of the sampling rod is connected to a trigger plate.

[0012] The sampling tube has a sampling hole at the center of its upper wall, and the sampling rod is slidably and sealed in the sampling hole. The bottom wall of the sampling tube has a water inlet, and the upper inner side wall of the sampling tube has a locking groove. The locking groove has an unlocking hole, and the unlocking hole has an unlocking rod that is slidably and sealed in the unlocking hole.

[0013] Furthermore, the self-locking sampling piston includes a piston body, an annular groove, and an embedded locking member. The piston body is movably disposed in the sampling cylinder, the annular groove is disposed at the center of the circumferential side wall of the piston body, and the embedded locking member is disposed in the annular groove.

[0014] As a further preferred embodiment of the present invention, the embedded locking member includes an embedded cavity, a self-locking spring, and a locking tongue. The embedded cavity is disposed in an annular groove, and engaging grooves are provided on two opposite inner sidewalls of the embedded cavity. The locking tongue is engaged and slidably disposed in the engaging grooves. The self-locking spring is disposed between the embedded cavity and the locking tongue. One end of the self-locking spring is disposed on the inner wall of the embedded cavity, and the other end of the self-locking spring is disposed on the locking tongue. The locking tongue cooperates with the locking groove.

[0015] Furthermore, the constant-level frame includes an outer ring, a middle ring, an inner ring, and a main frame. The middle ring is rotatably connected to the outer ring, the inner ring is rotatably connected to the middle ring, and the main frame is rotatably connected to the inner ring. The main frame is located at the center position. The rotation axes of the middle and outer rings are perpendicular to the rotation axes of the inner and middle rings. The rotation axes of the main frame and the inner ring are perpendicular to the rotation axes of the inner and middle rings. The main frame, located at the center position, always maintains a stable upward orientation regardless of how it rotates, thus enabling the sampling tube to maintain sampling under vertically balanced pressure.

[0016] The main frame includes sampling enclosures and connecting rods. Multiple pressure chambers are arranged from top to bottom, with the uppermost pressure chamber rotatably connected to the inner ring. Multiple sampling enclosures are arranged from top to bottom, and the sampling enclosures and pressure chambers are connected by connecting rods. The number of sampling enclosures is equal to the number of pressure chambers. The counterweight is located on the outer wall of the bottom end of the lowermost sampling enclosure. The lifting cable is connected to the outer ring.

[0017] Furthermore, the pressure chamber has limiting grooves on its two opposite inner sidewalls, and the engaging protrusion is engaged and slidably disposed in the limiting grooves. The pressure chamber has a lifting hole on its upper wall, and the elastic adjusting screw is engaged and slidably disposed in the lifting hole. The sampling enclosure has a telescopic hole on its sidewall, and the unlocking rod is engaged and slidably disposed in the telescopic hole.

[0018] The beneficial effects achieved by the present invention using the above structure are as follows: 1. Achieve flexible adjustment of trigger pressure: This invention, through the cooperative structure of the adjusting nut, trigger plate and spring, allows the trigger plate to be driven to move up and compress the spring simply by rotating the adjusting nut in actual operation. By changing the amount of spring compression, the magnitude of the trigger force can be precisely and flexibly adjusted, so that the trigger water pressure and the target sampling depth are accurately correlated. This meets the diverse needs of water sample collection at different depths and significantly improves the targeting and flexibility of sampling. 2. Smooth and reliable sampling process with high success rate: The present invention adopts a cooperative guiding design of engaging protrusion and limiting slot. During the process of the trigger plate moving down due to water pressure or moving up due to spring push, the engaging protrusion always slides smoothly along the limiting slot, effectively limiting the circumferential rotation and radial offset of the trigger plate, ensuring the smooth operation of the device at the moment of triggering and throughout the entire sampling stroke, avoiding sampling failure caused by component jamming or shaking, and greatly improving the sampling success rate; 3. Innovative solution to the problem of sample loss, ensuring sampling accuracy: This invention features a self-locking mechanism (locking tongue and self-locking spring) at the upper end of the sampling tube. When the piston body completes the sampling stroke and moves to the locking groove position, the locking tongue automatically engages with the locking groove under the push of the self-locking spring, firmly locking the piston body. This structural design effectively solves the technical problem in the prior art where the water sample is forced out due to the spring force pushing the piston back during the lifting process caused by the decrease in external water pressure. No matter how the external environment changes during the lifting process, the collected water sample is reliably sealed in the sampling tube, fundamentally ensuring the representativeness of the collected water sample and the accuracy of the test data.

[0019] 4. Stable device posture and strong environmental adaptability: The present invention has a constant level frame on the outside of the device. When the device is lowered into the water environment by the lifting cable, the constant level frame can use its own gravity balance characteristics to keep the device in a stable vertical state. This effectively reduces the interference of water flow impact and cable swing on the sampling posture, ensuring that the sampling tube can be lowered vertically and accurately triggered at the preset depth, further improving the standardization of sampling. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a water environment ecological monitoring and sampling device proposed in this invention; Figure 2 This is a left view of a water environment ecological monitoring and sampling device proposed in this invention; Figure 3 This is a front view of a water environment ecological monitoring and sampling device proposed in this invention; Figure 4 This is a top view of a water environment ecological monitoring and sampling device proposed in this invention; Figure 5 This is a bottom view of a water environment ecological monitoring and sampling device proposed in this invention; Figure 6 This is a schematic cross-sectional view of a water environment ecological monitoring and sampling device proposed in this invention. Figure 7 for Figure 6 A magnified view of part A in the middle; Figure 8 This is a schematic diagram of the elastically adjustable depth calibration component; Figure 9 This is a schematic diagram of the sampling tube. Figure 10 This is a schematic diagram of the combination of the sampling rod and the self-locking sampling piston; Figure 11 This is a cross-sectional schematic diagram of the combination of the sampling rod and the self-locking sampling piston. Figure 12 This is a schematic diagram of the Changping frame structure.

[0021] The components include: 1. Level frame; 2. Sampling unit; 3. Water pressure triggering mechanism; 4. Counterweight; 5. Lifting cable; 6. Trigger plate; 7. Elastic adjustable depth calibration component; 8. Limiting plate; 9. Threaded hole; 10. Engaging protrusion; 11. Elastic adjusting screw; 12. Adjusting nut; 13. Spring; 14. Sampling cylinder; 15. Sampling rod; 16. Self-locking sampling piston; 17. Sampling hole; 18. Water inlet. 19. Locking groove; 20. Unlocking hole; 21. Unlocking rod; 22. Piston body; 23. Ring groove; 24. Embedded locking element; 25. Embedded cavity; 26. Self-locking spring; 27. Locking tongue; 28. Engaging slide groove; 29. ​​Outer ring; 30. Middle ring; 31. Inner ring; 32. Main frame; 33. Pressure chamber; 34. Sampling enclosure; 35. Connecting rod; 36. Limiting slot; 37. Lifting hole; 38. Telescopic hole.

[0022] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0024] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0025] like Figures 1-12As shown, the present invention provides a water environment ecological monitoring sampling device, including a constant level frame 1, a sampling unit 2, a water pressure triggering mechanism 3, a counterweight 4, and a lifting cable 5. The sampling unit 2 is disposed in the constant level frame 1, the water pressure triggering mechanism 3 is disposed on the constant level frame 1 and is connected to the sampling unit 2, the counterweight 4 is disposed at the bottom of the constant level frame 1 and is used to provide the weight required for the device to sink, and the lifting cable 5 is disposed on the constant level frame 1 and is used to lower the device to the target water area and lift it from the water.

[0026] The constant-level frame 1 includes an outer ring 29, a middle ring 30, an inner ring 31, and a main frame 32. The middle ring 30 is rotatably connected to the outer ring 29, the inner ring 31 is rotatably connected to the middle ring 30, and the main frame 32 is rotatably connected to the inner ring 31. The main frame 32 is located at the center position. The rotation axes of the middle ring 30 and the outer ring 29 are perpendicular to the rotation axes of the inner ring 31 and the middle ring 30. The rotation axes of the main frame 32 and the inner ring 31 are perpendicular to the rotation axes of the inner ring 31 and the middle ring 30. Due to the influence of the center of gravity, the main frame 32, located at the center position, always maintains a stable upward orientation regardless of its rotation, thus enabling the sampling cylinder 14 to maintain sampling under vertically balanced pressure. The main frame 32 includes a pressure chamber 33, a sampling enclosure 34, and a connecting rod 35. The pressure chamber 33... Multiple sets of sampling enclosure bodies 34 are arranged from top to bottom. The uppermost pressure chamber 33 is rotatably connected to the inner ring 31. Multiple sets of sampling enclosure bodies 34 are arranged from top to bottom. The sampling enclosure bodies 34 and pressure chambers 33 are connected by connecting rods 35. The number of sampling enclosure bodies 34 is equal to the number of pressure chambers 33. The counterweight 4 is located on the outer wall of the bottom end of the lowermost sampling enclosure body 34. The lifting cable 5 is connected to the outer ring 29. The two opposite inner side walls of the pressure chamber 33 are provided with limiting slots 36. The engaging protrusion 10 is engaged and slidably disposed in the limiting slots 36. The upper wall of the pressure chamber 33 is provided with lifting holes 37. The elastic adjusting screw 11 is raised and lowered and slidably disposed in the lifting holes 37. The side wall of the sampling enclosure body 34 is provided with telescopic holes 38. The unlocking rod 21 is sealed and slidably telescopically disposed in the telescopic holes 38.

[0027] The water pressure triggering mechanism 3 includes a trigger plate 6, an elastic adjustable depth calibration component 7, and a limiting plate 8. The trigger plate 6 is engaged and slidably disposed in the constant level frame 1. The elastic adjustable depth calibration component 7 is threadedly connected to the trigger plate 6 and is telescopically slidably disposed in the constant level frame 1. The limiting plate 8 is connected to the elastic adjustable depth calibration component 7. The trigger plate 6 is provided with a threaded hole 9, and the outer circumferential wall of the trigger plate 6 is provided with an engaging protrusion 10. The elastic adjustable depth calibration component 7 includes an elastic adjusting screw 11, an adjusting nut 12, and a spring 13. The elastic adjusting screw 11 is threadedly connected to the threaded hole 9, and the adjusting nut 12 is threadedly connected to the elastic adjusting screw 11. The adjusting nut 12 is disposed below the trigger plate 6, and the spring 13 is sleeved on the outside of the elastic adjusting screw 11. One end of the spring 13 is disposed on the inner upper wall of the pressure chamber 33, and the other end of the spring 13 is disposed on the trigger plate 6.

[0028] Sampling unit 2 includes a sampling cylinder 14, a sampling rod 15, and a self-locking sampling piston 16. The sampling cylinder 14 is housed in the constant-level frame 1. The self-locking sampling piston 16 is movably disposed within the sampling cylinder 14. One end of the sampling rod 15 passes through the sampling cylinder 14 and is connected to the self-locking sampling piston 16, while the other end of the sampling rod 15 is connected to the trigger plate 6. A sampling hole 17 is provided at the center of the upper wall of the sampling cylinder 14. The sampling rod 15 is slidably and sealed within the sampling hole 17. A water inlet 18 is provided on the bottom wall of the sampling cylinder 14. A locking groove 19 is provided on the upper inner side wall of the sampling cylinder 14. An unlocking hole 20 is provided at the locking groove 19, and an unlocking rod 21 is slidably and sealed within the unlocking hole 20. The self-locking sampling piston 16 is enclosed in... The sample includes a piston body 22, an annular groove 23, and an embedded locking member 24. The piston body 22 is movably disposed in the sampling tube 14. The annular groove 23 is located at the center of the circumferential side wall of the piston body 22. The embedded locking member 24 is disposed in the annular groove 23. The embedded locking member 24 includes an embedded cavity 25, a self-locking spring 26, and a locking tongue 27. The embedded cavity 25 is disposed in the annular groove 23. The two opposite inner side walls of the embedded cavity 25 are provided with engagement grooves 28. The locking tongue 27 is engaged and slidably disposed in the engagement grooves 28. The self-locking spring 26 is disposed between the embedded cavity 25 and the locking tongue 27. One end of the self-locking spring 26 is disposed on the inner wall of the embedded cavity 25, and the other end of the self-locking spring 26 is disposed on the locking tongue 27. The locking tongue 27 cooperates with the locking groove 19.

[0029] In practical use, rotating the adjusting nut 12 causes the trigger plate 6 to move upward, compressing the spring 13 and achieving flexible adjustment of the spring force. The greater the spring force of the spring 13, the greater the corresponding trigger water pressure, and consequently, the deeper the water, thus achieving the effect of self-triggered sampling of water samples at different depths. After adjustment, the device is lowered to the water environment to be sampled by lifting the cable 5. Under the action of the constant level frame 1, the device can maintain a stable vertical state. When the sampling tube 14 reaches the depth of the trigger water pressure, the water pressure pushes the trigger plate 6 upward. At this time, the spring 13 contracts, and the trigger plate 6 moves smoothly upward along the limiting groove 36 through the engaging protrusion 10. The upward movement of the trigger plate 6 drives the sampling rod 15 upward, which in turn drives the piston body 22 upward. The piston body 22 moves upward and draws water at this depth into the sampling tube 14. As the piston body 22 moves upward, the water sample in the sampling tube 14 gradually increases until the piston body 22 moves upward to the locking groove 19. At this point, the locking tongue 27 is pushed into the locking groove 19 by the self-locking spring 26, thus locking the piston body 22. This effectively prevents the water pressure on the sampling tube 14 from gradually decreasing when the lifting cable 5 is lifted. When the elastic force of the spring 13 is greater than the water pressure, it will push the piston body 22 downward, thereby squeezing out the collected water sample. This further improves the sampling accuracy. By setting different spring 13 forces, the technical effect of sampling at different depths and water pressures can be achieved, realizing the technical effect of comprehensive water environment monitoring. The above is the specific working process of this invention. This step can be repeated next time it is used.

[0030] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the foregoing and its equivalents.

[0032] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A water environment ecological monitoring and sampling device, characterized in that: The system includes a constant level frame (1), a sampling unit (2), a water pressure triggering mechanism (3), a counterweight (4), and a lifting cable (5). The sampling unit (2) is located in the constant level frame (1), the water pressure triggering mechanism (3) is located on the constant level frame (1), and the water pressure triggering mechanism (3) is connected to the sampling unit (2). The counterweight (4) is located at the bottom of the constant level frame (1), and the lifting cable (5) is located on the constant level frame (1). The water pressure triggering mechanism (3) includes a trigger plate (6), an elastic adjustable depth calibration component (7), and a limiting plate (8). The trigger plate (6) is engaged and slidably located in the constant level frame (1). The elastic adjustable depth calibration component (7) is threadedly connected to the trigger plate (6). The elastic adjustable depth calibration component (7) is telescopically slidably located in the constant level frame (1), and the limiting plate (8) is connected to the elastic adjustable depth calibration component (7).

2. The water environment ecological monitoring sampling device according to claim 1, characterized in that: The trigger plate (6) is provided with a threaded hole (9), and the outer circumferential wall of the trigger plate (6) is provided with a locking protrusion (10).

3. The water environment ecological monitoring sampling device according to claim 2, characterized in that: The elastic adjustable depth calibration component (7) includes an elastic adjusting screw (11), an adjusting nut (12), and a spring (13). The elastic adjusting screw (11) is threadedly connected to the threaded hole (9), and the adjusting nut (12) is threadedly connected to the elastic adjusting screw (11). The adjusting nut (12) is located below the trigger plate (6). The spring (13) is sleeved on the outside of the elastic adjusting screw (11). The constant level frame (1) is provided with a pressure chamber (33). One end of the spring (13) is located on the inner upper wall of the pressure chamber (33), and the other end of the spring (13) is located on the trigger plate (6).

4. The water environment ecological monitoring sampling device according to claim 3, characterized in that: The sampling unit (2) includes a sampling cylinder (14), a sampling rod (15) and a self-locking sampling piston (16). The sampling cylinder (14) is located in the constant level frame (1). The self-locking sampling piston (16) is movably located in the sampling cylinder (14). One end of the sampling rod (15) passes through the sampling cylinder (14) and is connected to the self-locking sampling piston (16). The other end of the sampling rod (15) is connected to the trigger plate (6).

5. The water environment ecological monitoring sampling device according to claim 4, characterized in that: The sampling tube (14) has a sampling hole (17) at the center of the upper wall. The sampling rod (15) is slidably and sealed in the sampling hole (17). The bottom wall of the sampling tube (14) has a water inlet (18). The upper inner side wall of the sampling tube (14) has a locking groove (19). The locking groove (19) has an unlocking hole (20). The unlocking hole (20) has an unlocking rod (21) slidably and sealed in the unlocking hole (20).

6. The water environment ecological monitoring sampling device according to claim 5, characterized in that: The self-locking sampling piston (16) includes a piston body (22), an annular groove (23) and an embedded locking member (24). The piston body (22) is movably disposed in the sampling cylinder (14). The annular groove (23) is disposed at the center of the circumferential side wall of the piston body (22). The embedded locking member (24) is disposed in the annular groove (23).

7. A water environment ecological monitoring sampling device according to claim 6, characterized in that: The embedded locking component (24) includes an embedded cavity (25), a self-locking spring (26), and a locking tongue (27). The embedded cavity (25) is located in an annular groove (23). The two opposite inner walls of the embedded cavity (25) are provided with engagement grooves (28). The locking tongue (27) is engaged and slidably located in the engagement grooves (28). The self-locking spring (26) is located between the embedded cavity (25) and the locking tongue (27). One end of the self-locking spring (26) is located on the inner wall of the embedded cavity (25), and the other end of the self-locking spring (26) is located on the locking tongue (27). The locking tongue (27) cooperates with the locking groove (19).

8. A water environment ecological monitoring sampling device according to claim 7, characterized in that: The constant-level frame (1) includes an outer ring (29), a middle ring (30), an inner ring (31), and a main frame (32). The middle ring (30) is rotatably connected to the outer ring (29), the inner ring (31) is rotatably connected to the middle ring (30), and the main frame (32) is rotatably connected to the inner ring (31). The main frame (32) is located at the center position. The rotation axes of the middle ring (30) and the outer ring (29) are perpendicular to the rotation axes of the inner ring (31) and the middle ring (30). The rotation axes of the main frame (32) and the inner ring (31) are perpendicular to the rotation axes of the inner ring (31) and the middle ring (30).

9. A water environment ecological monitoring sampling device according to claim 8, characterized in that: The main frame (32) includes a sampling enclosure (34) and a connecting rod (35). Multiple pressure chambers (33) are provided from top to bottom. The uppermost pressure chamber (33) is rotatably connected to the inner ring (31). Multiple sampling enclosures (34) are provided from top to bottom. The sampling enclosures (34) and pressure chambers (33) are connected by connecting rods (35). The number of sampling enclosures (34) is equal to the number of pressure chambers (33). The counterweight (4) is located on the outer wall of the bottom end of the lowermost sampling enclosure (34). The lifting cable (5) is connected to the outer ring (29).

10. A water environment ecological monitoring sampling device according to claim 9, characterized in that: The pressure chamber (33) has two opposing inner sidewalls with limiting slots (36), and the engaging protrusion (10) is engaged and slidably disposed in the limiting slots (36). The upper wall of the pressure chamber (33) has a lifting hole (37), and the elastic adjusting screw (11) is raised and slidably disposed in the lifting hole (37). The sidewall of the sampling enclosure (34) has a telescopic hole (38), and the unlocking rod (21) is sealed and slidably telescopically disposed in the telescopic hole (38).

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