Water quality sampler for water quality monitoring

Abstract

This invention discloses a water quality sampler for water quality monitoring, comprising a main shell, a supporting shell mounted on top of the main shell, a counterweight mounted on the bottom of the main shell, and an assembly shell mounted on top of the supporting shell via a connecting bracket. It also includes an online water quality monitor, a water sample collection component, a cable, and a water sample storage component. The online water quality monitor is installed inside the supporting shell, enabling online monitoring of the water source. The water sample collection component is installed inside the main shell, the cable is mounted on top of the assembly shell, and the water sample storage component is installed inside the assembly shell. This invention addresses the problems of existing technologies, such as difficulty in achieving independent, stratified collection of water samples from different depths, the tendency for samples from different depths to mix during sampling, resulting in insufficient representativeness of the collected samples, susceptibility to impurities, and difficulty in accurately reflecting the true water quality status.

Description

Technical Field

[0001] This invention relates to the field of water quality monitoring technology, and specifically to a water quality sampler for water quality monitoring. Background Technology

[0002] In order to manage or monitor water bodies such as lakes, rivers, and ditches, it is necessary to conduct online monitoring and sampling of the water bodies to analyze and judge the water quality status, and then carry out targeted management.

[0003] When conducting fixed-point sampling of water bodies in shallow ditches, rivers, and small lakes, existing technologies generally employ tools such as surface water samplers or inverted water samplers (Nansen bottles) to sample the water. During the operation, a clean sampling bottle is first submerged in water at a predetermined depth. Then, by triggering the inversion or opening the bottle stopper, hydrostatic pressure is used to allow the water sample to naturally enter the bottle. After the air is expelled, the bottle is sealed and extracted, thus completing the water quality sampling.

[0004] Currently, traditional samplers are generally instantaneous single-point sampling devices, which can only obtain a single instantaneous sample of water at a certain depth. It is difficult to achieve independent and stratified sampling of water samples at different depths. Furthermore, water samples from different depths are prone to mixing during the sampling process, resulting in insufficient representativeness of the collected samples. The obtained water quality values ​​are relatively wide and cannot accurately reflect the true water quality status of the water body. At the same time, due to the different sampling areas, the sampling process is easily affected by solid impurities, which can cause large-volume impurities and tiny suspended solids in the water to enter the sample, easily interfering with the subsequent water sample test results. Summary of the Invention

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a water quality sampler for water quality monitoring, which solves the problems mentioned in the background art, namely, the difficulty in achieving independent and stratified collection of water samples at different depths, the tendency for water samples from different depths to mix during the sampling process, resulting in insufficient representativeness of the collected samples, and susceptibility to the influence of impurities, making it difficult to accurately reflect the true water quality status of the water body.

[0006] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: A water quality sampler for water quality monitoring includes a main body shell, a supporting shell mounted on top of the main body shell, and an assembly shell mounted on top of the supporting shell via a connecting bracket. The sampler also includes: The water quality online monitor is installed inside the housing and is capable of online monitoring of water sources. A water sample collection assembly is installed inside the main body shell for sampling external water sources; The cable is mounted on the top of the assembly housing; A water sample storage assembly is installed inside the assembly housing. It is used to collect water samples from different depths and allows the water samples to flow within the water sample storage assembly during the sampling process.

[0007] Based on the aforementioned solution, in order to transport water samples to the collection location when collecting water samples at different water levels separately, the water sample collection component includes: A transition tank, which is fixedly installed inside the main body shell; A water pump, which is fixedly installed on the transition tank, and the output end of the water pump is connected to the transition tank; A filtration unit, installed inside the housing, is used to filter the collected water sample.

[0008] To prevent solid impurities from affecting the identification of water samples during the collection process, the filtration unit includes: A coarse filter screen, wherein several coarse filter screens are fixedly installed at equal angles on the outside of the supporting housing; A water collection cylinder is installed inside the supporting outer shell. A fine filter screen is installed at the input end of the water collection cylinder, and the output end of the water collection cylinder is connected to the input end of the water pump. The filter element is installed between the fine filter screen and the inner bottom wall of the water collecting cylinder.

[0009] To ensure that air inside the transition tank can be easily expelled during water sample transfer, the following is also included: A discharge cylinder is installed on the transition tank, and the input end of the discharge cylinder is connected to the transition tank; A sealing plug is fixedly installed inside the discharge cylinder by a spring, and the sealing plug is in a sealing fit with the input end of the discharge cylinder; A discharge pipe, which is connected to the output end of the discharge cylinder.

[0010] To separately store water samples at different water levels within the water body, the water sample storage component includes: Assembly cylinders, a plurality of assembly cylinders are fixedly installed at equal angles on the bottom of the assembly shell; Sampling tube, the sampling tube is installed at the bottom of each of the assembly cylinders; The sampling unit is installed on each of the assembly cylinders and is used to transport the collected water sample into the sampling tube.

[0011] To collect water samples, the sampling unit includes: Each assembly cylinder has a conveying pipe connected to its top via a valve, and the input end of the conveying pipe is connected to the transition tank. The connection point between the conveying pipe and the transition tank is located on the side wall of the transition tank; The hose is connected to the output end of each of the delivery tubes and is located inside the sampling tube.

[0012] To improve the accuracy of water samples, an output pipe is also included. Each assembly tube is connected to the output pipe at its top via a one-way valve. When a water sample is input into the sampling tube, the one-way valve can discharge the substance in the sampling tube into the outside through the output pipe.

[0013] To ensure the overall stability of the sampler during operation, a counterweight is installed at the bottom of the main body shell.

[0014] (III) Beneficial Effects Compared with the prior art, the present invention provides a water quality sampler for water quality monitoring, which has the following beneficial effects: 1. In this invention, the coarse filter screen on the outside of the outer shell can initially filter large impurities such as aquatic plants, stones, and silt, preventing large particles of impurities from entering the equipment and causing blockage. The fine filter screen and filter element inside the water collection tube can perform secondary purification of the water, removing tiny suspended solids, ensuring the purity of the water sample entering the transition tank, and avoiding impurities from interfering with subsequent testing, thereby improving the cleanliness of the collected water sample and facilitating subsequent testing of the water sample.

[0015] 2. In this invention, the opening and closing of the delivery pipe is controlled by a valve, and the hose extends to the bottom of the sampling tube to achieve bottom water inlet. With the help of a one-way valve and an output pipe, air and residual water in the sampling tube can be automatically discharged when the water sample is injected, so as to realize the independent collection and sealing of water samples at different depths, completely avoid the mixing of water samples at different depths, and ensure that each sample collected can truly reflect the water condition at the corresponding depth. This avoids the problems of low accuracy and insufficient representativeness of instantaneous single-point collection, and improves the accuracy of stratified sampling.

[0016] 3. In this invention, by setting up a water sample collection component, impurities in the water body are removed during the water sample collection process, thereby preventing impurities from entering the water sample and interfering with subsequent detection. By setting up a water sample storage component, water samples at different depths in the water body can be collected, while effectively preventing water samples at different depths from mixing, improving the representativeness and accuracy of stratified sampling, and improving sampling efficiency and detection accuracy. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2This is a cross-sectional three-dimensional structural schematic diagram of the present invention; Figure 3 This is a cross-sectional perspective view of the three-dimensional structure from another angle in this invention; Figure 4 This is a cross-sectional view of the water sample collection component in this invention. Figure 5 This is a cross-sectional view of the water sample storage component in this invention. Figure 6 This is a cross-sectional view of the sampling section in this invention.

[0018] In the diagram: 1. Main body shell; 2. Load-bearing shell; 3. Connecting bracket; 4. Assembly shell; 5. Online water quality monitor; 6. Cable; 7. Transition tank; 8. Water pump; 9. Coarse filter screen; 10. Water collection cylinder; 11. Fine filter screen; 12. Filter element; 13. Discharge cylinder; 14. Sealing plug; 15. Spring; 16. Discharge pipe; 17. Assembly cylinder; 18. Sampling pipe; 19. Delivery pipe; 20. Valve; 21. Hose; 22. Output pipe; 23. Check valve; 24. Counterweight. Detailed Implementation

[0019] 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.

[0020] Please see Figures 1 to 6A water quality sampler for water quality monitoring includes a main housing 1, a supporting housing 2 mounted on top of the main housing 1, a counterweight 24 mounted on the bottom of the main housing 1, and an assembly housing 4 mounted on top of the supporting housing 2 via a connecting bracket 3. It also includes an online water quality monitor 5, a water sample collection assembly, a cable 6, and a water sample storage assembly. The online water quality monitor 5 is installed inside the supporting housing 2, enabling online monitoring of the water source. The online water quality monitor 5 has expansion capabilities, allowing the addition of various sensors to meet the monitoring needs of different scenarios. These monitors utilize supporting sensing technology and data analysis technology. The technology can reflect the status and changes of water quality in real time and detect pollution sources in the water in a timely manner. Its monitoring indicators include water temperature, turbidity, pH value, heavy metals, organic matter, etc. The main body shell 1 is equipped with a water sample collection component for sampling external water sources. The water sample collection component includes a transition tank 7, a water pump 8 and a filter. The transition tank 7 is fixedly installed inside the main body shell 1, and the water pump 8 is fixedly installed on the transition tank 7. The output end of the water pump 8 is connected to the transition tank 7. The filter is installed inside the supporting shell 2 and is used to filter the collected water sample. When adjusting the sampling depth, the water pump 8 needs to be turned off.

[0021] The counterweight 24 lowers the sampler's center of gravity, ensuring its vertical stability underwater. This reduces tilting caused by water flow impact and avoids sampling errors caused by equipment shaking, thereby improving the stability and reliability of the sampling process.

[0022] During use, the sampler needs to be moved to the water area where water samples need to be collected. Then, the water sample storage component is installed. The sampler is placed into the water area using the cable 6. The counterweight 24 helps the sampler sink into the water. The depth of the sampler is controlled by the distance extended by the cable 6.

[0023] When water samples need to be taken at different depths, the water pump 8 is turned on, and the water pump 8 delivers water to the transition tank 7. At this time, the outside water enters the housing 2 and, after being filtered by the filter, can enter the transition tank 7 under the operation of the water pump 8, thus avoiding impurities from interfering with the subsequent online monitoring and water sample test results. As the water sample is injected, the air in the transition tank 7 is compressed, thereby opening the sealing plug 14 supported by the spring 15. The air is discharged to the outside through the discharge cylinder 13 and the discharge pipe 16 in sequence, ensuring that the water sample can smoothly enter the transition tank 7. When the water sample fills the entire transition tank 7 and is discharged through the discharge pipe 16, the water sample storage component can be turned on to store the water sample in the transition tank 7.

[0024] Once a water sample is collected at this depth, samples can be collected at other depths until all collection work is completed. Then, cable 6 can be retrieved and the water samples stored.

[0025] When water samples are collected at different depths, the online water quality monitor 5 operates as the water passes through the supporting shell 2 to monitor the water online and obtain preliminary water quality information.

[0026] The filtration section includes a coarse filter screen 9, a water collection cylinder 10, and a filter element 12. Several coarse filter screens 9 are fixedly installed at equal angles on the outside of the supporting housing 2. The water collection cylinder 10 is installed inside the supporting housing 2. A fine filter screen 11 is installed at the input end of the water collection cylinder 10. The output end of the water collection cylinder 10 is connected to the input end of the water pump 8. The filter element 12 is installed between the fine filter screen 11 and the inner bottom wall of the water collection cylinder 10. The section also includes a discharge cylinder 13, a sealing plug 14, and a discharge pipe 16. The discharge cylinder 13 is installed on the transition tank 7. The input end of the discharge cylinder 13 is connected to the transition tank 7. The sealing plug 14 is fixedly installed inside the discharge cylinder 13 by a spring 15. The sealing plug 14 is sealed to the input end of the discharge cylinder 13. The discharge pipe 16 is connected to the output end of the discharge cylinder 13.

[0027] As the water pump 8 operates, the external water first passes through the coarse filter 9 to initially filter out large impurities such as aquatic plants, stones, and silt, preventing large particles from entering the equipment and causing blockages. The online water quality monitor 5 then monitors the water after the initial filtration. The water after the initial filtration enters the water collection cylinder 10 and undergoes secondary purification through the fine filter 11 and filter element 12 to remove tiny suspended solids, ensuring the purity of the water sample and preventing impurities from interfering with subsequent online monitoring and water sample test results.

[0028] To ensure that water can smoothly enter the transition tank 7, when the pressure inside the transition tank 7 increases to a certain level, the sealing plug 14 supported by the spring 15 can be opened. At this time, air and water are discharged to the outside through the discharge cylinder 13 and the discharge pipe 16 in sequence, ensuring that the water sample can smoothly enter the transition tank 7.

[0029] A cable 6 is installed on the top of the assembly housing 4. A water sample storage component is installed inside the assembly housing 4 for collecting water samples from different depths. During the sampling process, the water sample can flow within the water sample storage component. The water sample storage component includes an assembly cylinder 17, a sampling tube 18, and a sampling part. Several assembly cylinders 17 are fixedly installed at equal angles on the bottom of the assembly housing 4. A sampling tube 18 is installed at the bottom of each assembly cylinder 17 through a connecting thread. A sampling part is installed on each assembly cylinder 17 for transporting the collected water sample into the sampling tube 18.

[0030] When installing the sampling tube 18, the sampling tube 18 is installed at the bottom of the assembly cylinder 17 through the connecting thread that fits the top of the sampling tube 18 inside the assembly cylinder 17. After the sampler is lowered to the set sampling depth, the pre-treated water sample in the transition tank 7 is introduced into the corresponding sampling tube 18 by independently opening the corresponding sampling section, so as to collect the water sample at that depth. Since the multiple assembly cylinders 17 and sampling tubes 18 are independent of each other, they can correspond to the sampling needs of different depths. During the sampling process, the water sample can circulate and be renewed in the component, avoiding water sample deterioration caused by stagnant water or mixing of water samples from different depths, thereby ensuring that the collected water sample is representative.

[0031] The sampling unit includes a delivery pipe 19 and a hose 21. The top of each assembly tube 17 is connected to the delivery pipe 19 via a valve 20. The input end of the delivery pipe 19 is connected to the transition tank 7. The connection between the delivery pipe 19 and the transition tank 7 is located on the side wall of the transition tank 7. The output end of each delivery pipe 19 is connected to the hose 21. The output end of the hose 21 is located at the bottom of the sampling tube 18. The unit also includes an output pipe 22. The top of each assembly tube 17 is connected to the output pipe 22 via a one-way valve 23. When a water sample is input into the sampling tube 18, the one-way valve 23 can discharge the substance in the sampling tube 18 into the outside through the output pipe 22.

[0032] When a water sample needs to be collected at a certain depth, the valve 20 on the delivery pipe 19 corresponding to that depth is opened. The water sample in the transition tank 7 is transported to the hose 21 through the delivery pipe 19 by the water pump 8, and then transported to the bottom of the sampling tube 18 by the hose 21. The bottom water intake method is adopted to avoid water sample splashing and generating air bubbles. As the water sample is continuously injected, the original air and residual water in the sampling tube 18 are squeezed, which pushes the one-way valve 23 to open. The air and residual water are discharged to the outside through the output pipe 22, realizing the replacement of water in the sampling tube 18, completely avoiding the mixing of water samples from different depths, and ensuring sampling accuracy.

[0033] Once the water sample at that depth is collected, close the corresponding valve 20 to independently seal the water sample in the sampling tube 18. When moving to different depths, switch to open the valve 20 on other delivery tubes 19 and repeat the above operation steps to collect water samples at other depths, thus achieving multi-point sampling in layers.

[0034] The working principle or usage process of this invention is as follows: Move the sampler to the target sampling area. Install the sampling tubes 18 one by one at the bottom of the assembly cylinder 17 through the connecting threads that fit the top of the sampling tube 18 with the assembly cylinder 17 to complete the assembly of the sampling tubes 18. Then, the sampler can be placed into the target water area by the cable 6. The counterweight 24 at the bottom of the main body shell 1 will make the sampler sink steadily into the water. The depth of the sampler is controlled by controlling the distance released by the cable 6 until it moves to the first set sampling depth. At this time, the counterweight 24 ensures that the sampler is vertically stable underwater and avoids water swaying from affecting sampling and monitoring.

[0035] At this time, the water pump 8 is turned on. The external water first passes through the coarse filter 9 on the outside of the supporting shell 2 to filter out large impurities. The water after preliminary filtration enters the water collection cylinder 10 inside the supporting shell 2 and undergoes secondary purification through the fine filter 11 and filter element 12 to remove tiny suspended solids. During this process, the online water quality monitor 5 is activated to monitor the water after preliminary filtration in real time and obtain preliminary water quality data for the water at this depth. At the same time, the water pump 8 pumps the filtered water sample into the transition tank 7. As the water sample is continuously injected, the pressure inside the transition tank 7 gradually increases. When the pressure reaches a certain level, it can push open the sealing plug 14 supported by the spring 15. The air and part of the water sample inside the tank are discharged to the outside through the discharge cylinder 13 and the discharge pipe 16 in sequence, ensuring that the water sample enters the transition tank 7 smoothly until the water sample fills the entire transition tank 7.

[0036] When collecting water samples, the valve 20 of the sampling section corresponding to the depth is opened. The pretreated water sample in the transition tank 7 is transported to the hose 21 through the delivery pipe 19 under the action of the water pump 8. Then, the sample is continuously injected from the bottom of the sampling tube 18 through the hose 21. As the water sample collection proceeds, the air and some water in the sampling tube 18 are squeezed and push the one-way valve 23 to open, and are discharged to the outside through the output pipe 22, so as to completely replace the water in the sampling tube 18 and avoid mixing of water samples from different depths. After the water sample collection at that depth is completed, the corresponding valve 20 can be closed to independently seal the water sample in the sampling tube 18. Then, the distance of the cable 6 being released or retracted is adjusted to move the sampler to the next set sampling depth. Then, the above steps are repeated, and the valve 20 of the corresponding sampling section is switched to complete the collection and sealing of the water sample at that depth. The operation is repeated until the sampling work at all set depths is completed.

[0037] After sampling is completed, turn off the water pump 8 and the online water quality monitor 5, retrieve the sampler via the cable 6, remove each sampling tube 18 and store it properly. Combined with the real-time data collected by the online water quality monitor 5, it will facilitate subsequent water quality analysis and make the collected data more accurate.

[0038] 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 water quality sampler for water quality monitoring, comprising a main body shell (1), a supporting shell (2) mounted on the top of the main body shell (1), and an assembly shell (4) mounted on the top of the supporting shell (2) via a connecting bracket (3), characterized in that, Also includes: Water quality online monitor (5), the water quality online monitor (5) is installed inside the supporting shell (2), and can monitor the water source online; A water sample collection assembly is installed inside the main body shell (1) for sampling external water sources; Cable (6), the cable (6) is mounted on the top of the assembly housing (4); The water sample storage component is installed inside the assembly housing (4) for collecting water samples at different depths and allowing the water sample to flow within the water sample storage component during the sampling process.

2. The water quality sampler for water quality monitoring according to claim 1, characterized in that, The water sample collection assembly includes: Transition tank (7), which is fixedly installed inside the main body shell (1); A water pump (8) is fixedly installed on the transition tank (7), and the output end of the water pump (8) is connected to the transition tank (7); The filter unit is installed inside the carrier housing (2) and is used to filter the collected water sample.

3. A water quality sampler for water quality monitoring according to claim 2, characterized in that, The filtration unit includes: Coarse filter screen (9), a plurality of coarse filter screens (9) are fixedly installed at equal angles on the outside of the bearing shell (2); Water collecting cylinder (10), the water collecting cylinder (10) is installed inside the bearing shell (2), the input end of the water collecting cylinder (10) is equipped with a fine filter screen (11), and the output end of the water collecting cylinder (10) is connected to the input end of the water pump (8); The filter element (12) is installed between the fine filter screen (11) and the inner bottom wall of the water collection cylinder (10).

4. A water quality sampler for water quality monitoring according to claim 2, characterized in that, Also includes: Discharge cylinder (13), the discharge cylinder (13) is installed on the transition tank (7), and the input end of the discharge cylinder (13) is connected to the transition tank (7); A sealing plug (14) is fixedly installed inside the discharge cylinder (13) by a spring (15), and the sealing plug (14) is sealed to the input end of the discharge cylinder (13). Discharge pipe (16) is connected to the output end of discharge cylinder (13).

5. A water quality sampler for water quality monitoring according to claim 4, characterized in that, The water sample storage component includes: Assembly cylinder (17), a plurality of assembly cylinders (17) are fixedly installed at equal angles at the bottom of the assembly shell (4); Sampling tube (18), each of the assembly tubes (17) is equipped with a sampling tube (18) at the bottom; The sampling unit is installed on each of the assembly cylinders (17) for transporting the collected water sample into the sampling tube (18).

6. A water quality sampler for water quality monitoring according to claim 5, characterized in that, The sampling unit includes: The top of each assembly cylinder (17) is connected to the conveying pipe (19) via a valve (20), and the input end of the conveying pipe (19) is connected to the transition tank (7); The connection point between the conveying pipe (19) and the transition tank (7) is located on the side wall of the transition tank (7); The hose (21) is connected to the output end of each of the delivery tubes (19), and the hose (21) is located inside the sampling tube (18).

7. A water quality sampler for water quality monitoring according to claim 6, characterized in that, It also includes an output pipe (22), and the top of each assembly tube (17) is connected to the output pipe (22) through a one-way valve (23). When the water sample is input into the sampling tube (18), the one-way valve (23) can discharge the substance in the sampling tube (18) into the outside through the output pipe (22).

8. A water quality sampler for water quality monitoring according to claim 1, characterized in that, A counterweight (24) is installed at the bottom of the main shell (1).

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