Multi-water-level sampling device for water pollution detection
By designing a shuttle-shaped water inlet shell and a vacuum sampling box for a multi-level water sampling device, the problems of sample mixing and residue during multi-level water quality testing were solved, enabling independent and accurate water quality assessment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-24
- Publication Date
- 2026-03-27
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing water quality samplers may mix samples when testing multiple water levels, affecting the authenticity of the water samples. In addition, traditional pumping samplers have the problem of residues from previous sampling affecting the results.
Design a multi-level water sampling device, including a floating platform, an inlet shell, a multi-point sampling mechanism, and a water level adjustment mechanism. The inlet shell is spindle-shaped and has a buoyancy chamber, a sampling chamber, and an adjustment chamber inside. The depth is controlled by buoyancy adjustment, and independent sampling is performed using a vacuum sampling box to avoid sample mixing and residual effects.
It enables independent sampling at different water levels, avoiding contamination and residue effects between samples, improving the accuracy and stability of water quality assessment, and adapting to complex underwater environments.
Smart Images
Figure CN121740528A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of water sampling technology, specifically to a multi-level water sampling device for water pollution detection. Background Technology
[0002] Wastewater sampling is a crucial step in wastewater treatment. Only after sampling and testing can appropriate treatment solutions be provided. However, due to the complexity of the underwater environment, water stratification occurs at different depths in the water flow due to factors such as water temperature and flow direction, resulting in significant differences in water quality at different depths. Therefore, comprehensive sampling at multiple water levels has a decisive impact on the accuracy of water quality assessment results.
[0003] The structure of existing water quality samplers is as follows: Figure 1 As shown, the external structure is cylindrical. When sampling, the sampler is first placed in the water. After sinking to the target water level, the sampler is pulled up by the connected traction rope. During the upward movement of the sampler, the water sample is automatically collected and automatically sealed by the pressure of the water flow on the cover. This makes it easy for the water sample to exchange with water at other water levels above during the rise of the sampler, affecting the test results. Although the existing pumping sampler can improve the accuracy of sampling at the corresponding water level, the water sample remaining in the water pipe from the previous sampling will still affect the sampling results. Summary of the Invention
[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a multi-level water sampling device for water pollution detection, thereby solving the technical problem in the prior art where samples may mix during multi-level water sampling, affecting the authenticity of the water samples.
[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: A multi-level sampling device for water pollution detection includes a floating platform with a traction rope connected to it, a water inlet shell, a multi-point sampling mechanism, and a water level adjustment mechanism. The water inlet shell is spindle-shaped, with one end fixedly connected to the traction rope. The water inlet shell contains multiple chambers, and two partition plates are provided inside, dividing the interior of the water inlet shell into a buoyancy chamber, a sampling chamber, and an adjustment chamber. The buoyancy chamber is located on the side of the water inlet shell closest to the traction rope. The sampling chamber is located between the two partition plates, and the adjustment chamber is located on the side of the water inlet shell furthest from the buoyancy chamber. The multi-point sampling mechanism is located in the sampling chamber and contains multiple vacuum sampling boxes for storing water samples. The multi-point sampling mechanism can collect and store samples at different water levels. The water level adjustment mechanism is located in the buoyancy chamber and the adjustment chamber, and is used to adjust the depth of the water inlet shell in the water by adjusting the buoyancy. Traditional underwater sampling devices calculate underwater depth by adjusting the length of the traction rope. However, when the water flow has a certain velocity, the traction rope may tilt, affecting the calculation of the actual sampling depth. In this embodiment, the depth is controlled by adjusting the buoyancy within the submerged shell. The length of the traction rope can be extended to reduce the impact of water flow.
[0006] Preferably, the water inlet shell can be disassembled into two parts at the sampling chamber location, allowing for the replacement of the vacuum sampling box. The second partition plate is also detachable, facilitating the replacement of the compressed gas cylinder. Before sampling, the compressed gas cylinder and vacuum sampling box must be replaced and inspected before sampling can proceed.
[0007] Furthermore, the water level regulating mechanism includes an exhaust pipe, a water exchange pipe, and a compressed air cylinder. The exhaust pipe is located near the connection point of the traction rope within the buoyancy chamber, and an exhaust valve is installed on the exhaust pipe. The water exchange pipe is located within the buoyancy chamber near the first partition plate. Both the water exchange pipe and the exhaust pipe penetrate the water inlet shell. The compressed air cylinder is fixedly installed in the regulating chamber, and an air supply valve is fixedly connected to the cylinder opening. An air supply pipe is connected to the air supply valve and penetrates both the first partition plate and the second partition plate. A partial counterweight can also be installed in the regulating chamber to reduce the impact of water flow on the water inlet shell.
[0008] Furthermore, the buoyancy chamber can accumulate air, allowing one end of the water inlet shell containing the buoyancy chamber to face upwards in the water. Gas gathers near the exhaust pipe. When gas from the compressed gas cylinder enters the buoyancy chamber through the air supply pipe, it forces water out of the water inlet shell through the water exchange pipe, maintaining a relatively vertical position in the water. The spindle-shaped design reduces the impact of water flow on the water inlet shell. In this embodiment, the water inlet shell is designed as a triangular pyramid, but it can also be designed as a flat shell with a raised center. The core purpose of this design is to allow the water inlet shell to automatically adjust its posture when impacted by water flow, ensuring the water flows along its sides, preventing rotation and agitation of the water flow, thus preventing water flow disturbance from affecting sampling accuracy. Simultaneously, the streamlined spindle structure reduces entanglement with aquatic plants and debris, adapting to complex underwater environments.
[0009] As a further embodiment, the multi-point sampling mechanism includes a sampling tube, a water inlet valve, and a docking plate. Multiple sampling tubes are fixedly connected to the sampling chamber, and each sampling tube is provided with a water inlet valve. The water inlet valve is fixedly installed on the second partition plate, and the docking plate is fixedly connected to the first partition plate on the side close to the second partition plate. After the water inlet shell is disassembled, the vacuum sampling box can be detachably connected to the sampling tube. Multiple vacuum sampling boxes are arranged around the air delivery pipe. When the water inlet shell, which is divided into two parts, is connected to each other, the docking plate is detachably connected to the multiple vacuum sampling boxes.
[0010] Based on the aforementioned scheme, the vacuum sampling box is pre-evacuated to a vacuum state. When the water inlet valve is opened, the water around the water inlet shell can be sucked into the vacuum sampling box. At this time, the water inlet valve is closed, and the vacuum sampling box completes sampling.
[0011] Furthermore, the floating platform is equipped with multiple circumferentially arranged support arms, each with buoyancy blocks. The arrangement of these buoyancy blocks allows the floating platform to cover a large area on the water surface, preventing it from tilting and maintaining a relatively level position. A traction device can be installed on the floating platform to wind and unwind the traction rope.
[0012] (III) Beneficial Effects Compared with the prior art, the present invention provides a multi-level water sampling device for water pollution detection, which has the following beneficial effects: 1. For example Figure 1The existing water sampler shown is cylindrical. In this invention, the outer shell of the water inlet is shaped like a shuttle, which makes it less likely to be entangled by aquatic plants and other impurities when the outer shell rises and falls in the water. The water at different water levels is sampled by vacuum sampling boxes set inside. The vacuum sampling boxes are independent of each other and the water samples inside do not come into contact with each other, eliminating the possibility of pollution. In addition, the vacuum sampling boxes are disposable, avoiding the influence of previous sampling residues. 2. To ensure the water-immersed outer shell remains stably at the target water level during sampling, this invention incorporates a water-immersed outer shell and its buoyancy chamber, sampling chamber, and adjustment chamber. These features allow for adjustment of the outer shell's posture and depth in the water, enabling accurate sampling at different water levels. Simultaneously, it reduces the impact of water flow on the sampling results. Furthermore, by using a vacuum sampling box, compared to traditional sampling methods, the influence between different samples is avoided. The required equipment is relatively small, sampling can be completed underwater, and the samples are independent, resulting in more accurate results. Attached Figure Description
[0013] Figure 1 A schematic diagram of an existing water quality sampling device; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the water-entry outer shell structure in this invention; Figure 4 This is a partial internal cross-sectional view of the buoyancy cavity, sampling cavity, and adjustment cavity working together in this invention. Figure 5 This is a partial internal cross-sectional view of the buoyancy cavity, sampling cavity, and adjustment cavity working together in this invention from another perspective. Figure 6 This is a schematic diagram of the structure of the multi-point sampling mechanism and the water level regulating mechanism working together in this invention; Figure 7 This is a schematic diagram of the structure of the multi-point sampling mechanism and the air delivery pipe in this invention. Figure 8 This is a schematic diagram of the present invention performing underwater sampling.
[0014] In the diagram: 1. Floating platform; 2. Towing rope; 3. Water-entry shell; 4. Divider plate one; 5. Divider plate two; 6. Buoyancy chamber; 7. Sampling chamber; 8. Adjustment chamber; 9. Vacuum sampling box; 10. Exhaust pipe; 11. Exhaust valve; 12. Water exchange pipe; 13. Compressed air cylinder; 14. Air supply valve; 15. Air supply pipe; 16. Sampling pipe; 17. Water inlet valve; 18. Connecting plate; 19. Support arm; 20. Buoyancy block; 21. Counterweight block; 22. Towing device. Detailed Implementation
[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0016] Example 1 like Figures 1-8 As shown in the figure, this embodiment proposes a multi-level sampling device for water pollution detection, including a floating platform 1 with a traction rope 2 connected to it, an inlet shell 3, a multi-point sampling mechanism, and a water level adjustment mechanism. The inlet shell 3 is spindle-shaped, with one end fixedly connected to the traction rope 2. Multiple chambers are provided inside the inlet shell 3, and a first partition plate 4 and a second partition plate 5 are provided inside, dividing the interior of the inlet shell 3 into a buoyancy chamber 6, a sampling chamber 7, and an adjustment chamber 8. The buoyancy chamber 6 is located on the side of the inlet shell 3 closest to the traction rope 2, the sampling chamber 7 is located between the first partition plate 4 and the second partition plate 5, and the adjustment chamber 8 is located on the side of the inlet shell 3 furthest from the buoyancy chamber 6. The multi-point sampling mechanism is located in the sampling chamber 7 and includes multiple vacuum sampling boxes 9 for water sample storage. The multi-point sampling mechanism can collect water samples at different water levels. The sample storage and water level adjustment mechanism are set in the buoyancy chamber 6 and the adjustment chamber 8. It is used to adjust the depth of the water inlet shell 3 in the water by adjusting the buoyancy. Traditional water quality samplers calculate the underwater depth by adjusting the length of the traction rope 2. However, due to the existence of water flow velocity, the water inlet shell 3 may be pushed to float in the water, causing the traction rope 2 to be in an inclined state, which affects the judgment of the actual sampling water level. In this embodiment, the depth is controlled by adjusting the buoyancy in the water inlet shell 3. The length of the traction rope 2 can be released to reduce the impact of water flow. Sampling is carried out by multiple independent vacuum sampling boxes 9. When the water inlet shell 3 sinks in the water to sample water levels at multiple depths in sequence, multiple samples do not affect each other. Moreover, the vacuum sampling box 9 automatically draws in the water sample. Each vacuum sampling box 9 and its matching sampling tube 16 and water inlet valve 17 are set independently to avoid cross-contamination of samples.
[0017] To facilitate the replacement of the vacuum sampling box 9 and the compressed gas cylinder 13, the water inlet housing 3 can be disassembled into two parts at the sampling chamber 7, allowing for the replacement of the vacuum sampling box 9. The second partition plate 5 is detachably installed within the water inlet housing 3. Figure 5As shown, in this application, the second partition plate 5 is connected to the water inlet shell 3 through a slot. After removing the second partition plate 5, it is convenient to replace the compressed gas cylinder 13. Before sampling, the compressed gas cylinder 13 and the vacuum sampling box 9 must be replaced and inspected before sampling can be carried out.
[0018] To ensure the water inlet casing 3 remains vertical in the water, the water level regulating mechanism includes an exhaust pipe 10, a water exchange pipe 12, and a compressed air cylinder 13. The compressed air cylinder 13 and the exhaust valve 11 also serve as counterweights. Figure 4 , Figure 5 As shown, the exhaust pipe 10 is located near the connection point of the traction rope 2 in the buoyancy chamber 6. An exhaust valve 11 is installed on the exhaust pipe 10. The water exchange pipe 12 is located in the buoyancy chamber 6 near the first partition plate 4. Both the water exchange pipe 12 and the exhaust pipe 10 penetrate the water-inlet shell 3. The compressed air cylinder 13 is fixedly installed in the regulating chamber 8. An air supply valve 14 is fixedly connected to the cylinder opening. An air supply pipe 15 is connected to the air supply valve 14 and passes through the first partition plate 4 and the second partition plate 5. A counterweight 21 is fixedly installed at the end of the regulating chamber 8 away from the buoyancy chamber 6. Figure 4 As shown, the counterweight 21 allows the submersible shell 3 to sink into the water by its own weight, and the buoyancy is adjusted to control its floating and sinking in the water, thereby controlling the water level.
[0019] Due to the counterweight 21 and the ability to store air in the buoyancy chamber 6, one end of the water inlet shell 3 containing the buoyancy chamber 6 faces upwards in the water. Gas gathers near the exhaust pipe 10. When gas from the compressed gas cylinder 13 enters the buoyancy chamber 6 through the air supply pipe 15, it forces water out of the water inlet shell 3 through the water exchange pipe 12. The water inlet shell 3 remains relatively vertical in the water. Its spindle-shaped design reduces the movement of the water inlet shell 3 affected by water flow. In this embodiment, the water inlet shell 3 is set as a triangular pyramid, or it can be set as a flat shape with a raised center. This allows it to automatically rotate to impact one side of the water flow, preventing it from rotating in the water and disturbing the water flow, thus avoiding sampling. Compared to existing water samplers, which are often bucket-shaped (e.g.,...), this design is more efficient. Figure 1 As shown in the figure, when it floats and sinks vertically in the water, it is easily entangled by aquatic plants, which affects the seal of the cover. This can lead to water samples from locations outside the sampling water level entering the water quality sampler and affecting the sampling results.
[0020] like Figures 3-6As shown, the multi-point sampling mechanism includes a sampling tube 16, a water inlet valve 17, and a docking plate 18. Multiple sampling tubes 16 are fixedly connected in the sampling chamber 7. In this embodiment, six sampling tubes 16 are arranged in a circle on the water inlet shell 3. Each sampling tube 16 is equipped with a water inlet valve 17, which is fixedly installed on the second partition plate 5. The docking plate 18 is fixedly connected to the side of the first partition plate 4 near the second partition plate 5. After the water inlet shell 3 is disassembled, the vacuum sampling box 9 can be detachably connected to the sampling tube 16. Multiple vacuum sampling boxes 9 are arranged around the air supply pipe 15. When the water inlet shell 3, which is divided into two parts, is connected to each other, the docking plate 18 is detachably connected to the multiple vacuum sampling boxes 9. The vacuum sampling boxes 9 are fixed by the docking plate 18 and the sampling tubes 16.
[0021] The vacuum sampling box 9 is pre-evacuated. When the water inlet valve 17 is opened, water around the water inlet shell 3 can be drawn into the vacuum sampling box 9. At this time, the water inlet valve 17 closes, and the vacuum sampling box 9 completes sampling. Sampling is automatically completed by the low air pressure inside the vacuum sampling box 9. Sampling automatically ends after the water sample fills the vacuum sampling box 9. Each vacuum sampling box 9 is independent of the others and does not affect the sampling results. Figure 8 As shown, the water-inlet shell 3 floats and sinks in the water, moving to different water levels to take samples. After the water sample is drawn into the vacuum sampling box 9, the overall weight of the water-inlet shell 3 will change, causing the whole shell to sink slightly in the water. However, although there are differences in water quality between different water levels, the differences are negligible in a small range. The small positional change will not affect the sampling accuracy. Moreover, the vacuum sampling box 9 has a fast sampling speed, and the sampling can be completed while the water-inlet shell 3 sinks due to the filling of water into the vacuum sampling box 9.
[0022] like Figure 1 As shown, the floating platform 1 has multiple support arms 19 arranged in a circular pattern, and buoyancy blocks 20 are set on the support arms 19. The arrangement of multiple buoyancy blocks 20 makes the floating platform 1 form a large coverage area on the water surface, making the floating platform 1 less prone to tilting and able to maintain a relatively horizontal state. A traction device 22 can be set on the floating platform 1. The traction rope 2 is connected to the traction device 22. The traction device 22 is equipped with an electric hoist that can wind and unwind the traction rope 2. After sampling is completed, the water-entry shell 3 is lifted upward to complete the recovery of the water-entry shell 3.
[0023] The working principle of this invention is as follows: Staff move to the planned sampling location by boat or other means, place the floating platform 1 on the water surface, and the water inlet shell 3 gradually sinks into the water through the connection of the traction rope 2. When the air supply valve 14 is opened, the gas in the compressed gas cylinder 13 can enter the buoyancy chamber 6 through the air supply pipe 15. One end of the buoyancy chamber 6 on the water inlet shell 3 faces upward. When the exhaust valve 11 is opened, the gas in the buoyancy chamber 6 can be discharged, and external water enters the water inlet shell 3 through the water exchange pipe 12. At this time, the water inlet shell 3 sinks in the water. When it sinks to the water level that needs to be sampled, the exhaust valve 11 is closed. At this time, one of the water inlet valves 17 is opened, and external water is drawn in through the corresponding sampling pipe 16 under the negative pressure of the vacuum sampling box 9. After the set closing time is reached, the water inlet valve 17 is closed, and the sampling is completed.
[0024] Example 2 When the underwater environment in the water area being tested is complex, such as when there are many algae, aquatic plants, garbage and other impurities in the water, the vacuum sampling box 9 may cause blockage of the sampling tube 16 when sampling. After the water inlet shell 3 reaches the target water level, the water inlet valve 17, which is connected to multiple vacuum sampling boxes 6 arranged in a circle, is opened, and sampling is carried out at the same time through the sampling tube 16. In order to avoid some sampling tubes 16 being blocked and unable to complete the sampling, multiple vacuum sampling boxes 9 sample at the same time to improve the probability of accurate sampling. After the water pumping sampling time is reached, the water inlet valve 17 is closed to complete the sampling. After that, the vacuum sampling box 9 can be replaced to complete the sampling work at another water level.
[0025] 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 appended claims and their equivalents.
Claims
1. A multi-level sampling device for water pollution detection, comprising a floating platform (1), wherein a traction rope (2) is connected to the floating platform (1), characterized in that, Also includes: The water inlet shell (3) is shaped like a shuttle, with one end fixedly connected to the traction rope (2), and multiple chambers are provided in the water inlet shell (3); The water inlet shell (3) is provided with a partition plate one (4) and a partition plate two (5), which divide the interior of the water inlet shell (3) into a buoyancy chamber (6), a sampling chamber (7) and an adjustment chamber (8). The buoyancy chamber (6) is located in the water inlet shell (3) on the side close to the traction rope (2), the sampling chamber (7) is located between the first partition plate (4) and the second partition plate (5), and the adjustment chamber (8) is located in the water inlet shell (3) on the side away from the buoyancy chamber (6). A multi-point sampling mechanism is provided in the sampling chamber (7). The multi-point sampling mechanism is provided with multiple vacuum sampling boxes (9). Water samples can be stored in the vacuum sampling boxes (9). The multi-point sampling mechanism can sample and store water samples at different water levels. A water level adjustment mechanism is provided in the buoyancy chamber (6) and the adjustment chamber (8) for adjusting the depth of the water-inlet shell (3) in the water by adjusting the buoyancy.
2. The multi-level sampling device for water pollution detection according to claim 1, characterized in that, The water inlet shell (3) can be disassembled into two parts at the sampling chamber (7), at which time the vacuum sampling box (9) can be replaced.
3. The multi-level sampling device for water pollution detection according to claim 2, characterized in that, The water level regulating mechanism includes: An exhaust pipe (10) is provided near the connection point of the buoyancy chamber (6) and an exhaust valve (11) is provided on the exhaust pipe (10). The water exchange pipe (12) is located in the buoyancy cavity (6) near the partition plate (4). Both the water exchange pipe (12) and the exhaust pipe (10) penetrate the water inlet shell (3). A compressed gas cylinder (13) is fixedly installed in the regulating chamber (8). A gas supply valve (14) is fixedly connected to the cylinder opening. A gas supply pipe (15) is connected to the gas supply valve (14). The gas supply pipe (15) passes through the first partition plate (4) and the second partition plate (5).
4. The multi-level sampling device for water pollution detection according to claim 3, characterized in that, Air can be stored in the buoyancy chamber (6), so that one end of the buoyancy chamber (6) in the water inlet shell (3) is facing upward in the water. The gas gathers near the exhaust pipe (10). When the gas in the compressed gas cylinder (13) enters the buoyancy chamber (6) through the air supply pipe (15), the water in the buoyancy chamber (6) can be squeezed out of the water inlet shell (3) through the water exchange pipe (12).
5. A multi-level sampling device for water pollution detection according to claim 3, characterized in that, The multi-point sampling mechanism includes: Multiple sampling tubes (16) are fixedly connected to the sampling chamber (7), and each sampling tube (16) is provided with a water inlet valve (17), which is fixedly installed on the partition plate (5); The docking plate (18) is fixedly connected to the first partition plate (4) on the side near the second partition plate (5); After the water inlet shell (3) is disassembled, the vacuum sampling box (9) can be detachably connected to the sampling tube (16). Multiple vacuum sampling boxes (9) are arranged around the air supply tube (15). When the water inlet shell (3) which is disassembled into two parts is connected to each other, the docking plate (18) is detachably connected to multiple vacuum sampling boxes (9).
6. A multi-level sampling device for water pollution detection according to claim 5, characterized in that, The vacuum sampling box (9) is evacuated. When the water inlet valve (17) is opened, the water around the water inlet shell (3) can be sucked into the vacuum sampling box (9). At this time, the water inlet valve (17) is closed, and the vacuum sampling box (9) completes sampling.
7. A multi-level sampling device for water pollution detection according to claim 1, characterized in that, The floating platform (1) is provided with multiple support arms (19) arranged in a circular pattern, and buoyancy blocks (20) are provided on the support arms (19).
8. A multi-level sampling device for water pollution detection according to claim 4, characterized in that, The water-inlet shell (3) remains relatively vertical in the water, and its spindle-shaped shape reduces the impact of water flow on the water-inlet shell (3).