Automatic sampling and analyzing device for water quality monitoring
The design of multi-layer sealed sampling barrels, turbine blades and spoilers solves the problem of uneven sample mixing in water quality monitoring, improves monitoring accuracy and work efficiency, prevents instrument blockage and simplifies maintenance processes.
Patent Information
- Application Number
- CN202510916442.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-03
- Publication Date
- 2025-09-26
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
During water quality monitoring, liquid sloshing caused by container movement or external disturbances leads to vertical mixing of water bodies at different depths, affecting the accuracy of monitoring data and work efficiency.
It adopts a multi-layer sealed sampling barrel design, combined with turbine blades and spoilers, and isolates samples at different depths through layered plates. It also uses turbine blades and spoilers to achieve uniform mixing and rapid recovery of samples. It is equipped with a rubber sealed airbag to prevent impurities from clogging and automatic replacement of filter plates.
It improves the accuracy and work efficiency of water environment quality assessment, reduces sample mixing errors, ensures the efficiency and stability of the mixing process, prevents instrument clogging, and simplifies the maintenance process.
Smart Images
Figure CN120702813A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of environmental monitoring, and more particularly to an automated sampling and analysis device for water quality monitoring. Background Art
[0002] The purpose of water quality monitoring is to assess whether the physical, chemical and biological indicators in the water body meet safety standards, so as to protect human health, maintain ecological balance, ensure the sustainable use of water resources, and prevent the spread of diseases, environmental damage and economic risks caused by water pollution. Therefore, it is necessary to use water quality monitoring sampling and analysis equipment to regularly sample water bodies in designated waters in order to monitor the water body and determine whether the water body meets safety standards.
[0003] During the stratified sampling of water bodies, the sampling container needs to be lowered to the specified water depth to retain water samples. However, during the sample extraction stage, the liquid shaking caused by the movement of the container or external disturbance will cause vertical mixing of water bodies at different depths. Even if a closed vertical cylindrical sampling container is used, the disturbance caused by mechanical vibration or change in water flow resistance during transportation will still break the original stratification state of the water body, which will interfere with the acquisition of parameters such as temperature gradient, dissolved oxygen stratification, and pollutant distribution characteristics, resulting in the monitoring data being unable to truly reflect the characteristics of the water body profile, thereby affecting the assessment of the water body environmental quality. Using smaller sampling containers for multiple sampling will increase the workload of staff and affect the work efficiency of the overall monitoring process. Summary of the Invention
[0004] In response to the problems existing in the prior art, the purpose of the present invention is to provide an automated sampling and analysis device for water quality monitoring to solve the problem of liquid shaking caused by container movement or external disturbance, which can lead to vertical mixing of water bodies at different depths.
[0005] To solve the above problems, the present invention adopts the following technical solutions.
[0006] An automated sampling and analysis device for water quality monitoring, comprising a suspension support frame and a sampling mechanism, wherein the sampling mechanism is arranged on the surface of the suspension support frame, the sampling mechanism comprising a middle suspension rod fixedly connected to the middle of the suspension support frame, a plurality of sampling buckets are fixedly connected to both sides of the middle suspension rod, both ends of the suspension support frame are rotatably connected to a connecting shaft, a plurality of layered plates are fixedly connected to the surfaces of the two connecting shafts, the bottom end of the connecting shaft is fixedly connected to a bottom water-blocking plate, the top ends of the two connecting shafts are fixedly connected to a first sprocket, the two first sprockets are connected by a first chain transmission, a first motor is fixedly connected to the surface of the suspension support frame, and the output shaft of the first motor is fixedly connected to the middle of the upper surface of one of the first sprockets.
[0007] Furthermore, the plurality of layered plates are respectively located at the top ends of the plurality of sampling buckets, and the bottom water barrier is located at the bottom of the lowest sampling bucket.
[0008] Furthermore, the plurality of sampling buckets are grouped in pairs, and a water outlet pipe and a water inlet pipe are fixedly inserted inside the two sampling buckets, the water outlet pipes and the water inlet pipes on the two sampling buckets are staggered up and down, and a guide pipe is installed between the water inlet pipe and the outlet pipe, the interior of the guide pipe is rotatably connected to a turbine blade, the surface of the turbine blade is fixedly connected to a plurality of passive magnet blocks, the surface of the guide pipe is rotatably sleeved with a second sprocket, the surface of the second sprocket is fixedly connected to a plurality of active magnet blocks, both sides of the middle part of the suspension support frame are fixedly connected to a pendant frame, the top end of the pendant frame is rotatably connected to a third sprocket, the third sprocket and the plurality of second sprockets are connected by a second chain transmission, the top end of the pendant frame is fixedly connected to a second motor, the output shaft of the second motor is fixedly connected to the third sprocket, and the surface of the pendant frame is rotatably connected to a plurality of pressure sprockets.
[0009] Furthermore, two long shafts are rotatably inserted inside the layered plate, and spoilers are fixedly connected to the surfaces of the two long shafts.
[0010] Furthermore, the same end of the two long shafts is fixedly connected to a transmission gear, the two transmission gears are meshed with each other, the side of the suspension support frame is fixedly connected to a transverse frame, the longitudinal arm end of the transverse frame is sleeved with a transverse frame, and the surface of the transverse frame is fixedly connected to two racks, and the rack is meshed with one of the corresponding transmission gears.
[0011] Furthermore, a return spring is fixedly connected to the lower surface of the transverse bracket, the bottom end of the return spring is fixedly connected to the transverse arm end of the transverse bracket, and the rear end of the transverse bracket is fixedly connected to a handle.
[0012] Furthermore, two filter screens are inserted into the water inlet pipe.
[0013] Furthermore, the top end of the water inlet pipe is fixedly connected to two pull-out pipes, the top ends of the two filter screens are respectively located inside the two pull-out pipes, and the top ends of the pull-out pipes are threadedly sleeved with sealing covers.
[0014] Furthermore, the inner top end of the sealing cover is rotatably connected to a rotating shaft, the lower end of the rotating shaft is rotatably connected to a clamping block, and the clamping block is clamped to the filter screen plate.
[0015] Furthermore, a rubber-sealed airbag is provided inside the extraction tube, and a side surface of the rubber-sealed airbag is connected to an air nozzle, which is fixedly inserted into the interior of the extraction tube.
[0016] Compared with the prior art, the present invention has the following beneficial effects:
[0017] (1) This solution separates multiple sampling buckets through multiple layered plates to construct multi-layer sealed spaces. These sealed spaces can separate water samples at different depths. When the sampling buckets are taken out of the water body, even if the samples in the closed space after stratification are mixed to a certain extent, due to the stratification process, the mixing is limited to the local area after stratification and will not cause mixing of samples within a larger depth range. Therefore, when conducting subsequent water monitoring and analysis work at different depths, the error range provided by the required samples is relatively small, which helps to reduce the impact on the water environment quality assessment results and improve the accuracy and reliability of the assessment.
[0018] (2) This solution can drive the water sample to circulate between two sampling buckets at the same layer through the rotation of the turbine blades, thereby achieving sample mixing, making the suspended matter, sediment or dissolved matter at a specified depth evenly distributed and reducing sampling deviation.
[0019] (3) This scheme intervenes and disrupts the flow of water samples in the sampling barrel through the design of spoilers, which not only speeds up the mixing rate of water samples, but also ensures a more uniform and sufficient mixing process, so that the components of the sample can be fully mixed. When the mixing operation stops, the presence of the spoilers can effectively accelerate the water samples to return to a calm state for sampling and analysis.
[0020] (4) This solution can prevent larger impurities from clogging the instrument during the subsequent analysis process. When maintenance or cleaning is required, the gap in the middle of the rubber sealing airbag will be automatically re-sealed, effectively preventing the water sample from flowing out. At the same time, the other filter plate can continuously filter the water sample, ensuring that the flow of the water sample does not need to be suspended during the replacement and cleaning of the filter plate, thereby maintaining the efficiency and stability of the mixing and filtration process and reducing the impact on the overall operation process. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a structural schematic diagram of the present invention;
[0022] Figure 2 This is a schematic diagram of the structure inside the sampling barrel of the present invention;
[0023] Figure 3 It is a structural schematic diagram of the suspension support frame part of the present invention;
[0024] Figure 4 Schematic diagram of the structure of the water outlet pipe and the water inlet pipe of the present invention;
[0025] Figure 5 This is a schematic diagram of the structure inside the water inlet pipe of the present invention;
[0026] Figure 6 It is a structural schematic diagram of the flow guide pipe part of the present invention;
[0027] Figure 7 It is a structural schematic diagram of the filter screen plate portion of the present invention;
[0028] Figure 8 For the present invention Figure 7 Enlarged view of point A in the middle.
[0029] Description of the numbers in the figure:
[0030] 1. Suspension support frame; 2. Sampling bucket;
[0031] 301, connecting shaft; 302, layered plate; 303, middle suspension rod; 304, bottom baffle; 305, first chain; 306, first sprocket; 307, first motor;
[0032] 401, water outlet pipe; 402, second chain; 403, second sprocket; 404, passive magnet block; 405, active magnet block; 406, water inlet pipe; 407, pressure sprocket; 408, drooping frame; 409, spoiler; 410, long shaft; 411, transmission gear; 412, rack; 413, transverse bracket; 414, transverse frame; 415, return spring; 416, handle; 417, second motor; 418, turbine blades; 419, guide pipe; 420, third sprocket;
[0033] 501, filter screen; 502, sealing cover; 503, extraction tube; 504, air nozzle; 505, rubber sealing airbag; 506, clamping block; 507, rotating shaft. DETAILED DESCRIPTION
[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0035] See also Figure 1-Figure 3, an automated sampling and analysis device for water quality monitoring, comprising a hanging support frame 1, through which the sampling and analysis device can be mounted on the edge of the hull, a sampling mechanism, the sampling mechanism being arranged on the surface of the hanging support frame 1, the sampling mechanism comprising a middle hanging rod 303 fixedly connected to the middle of the hanging support frame 1, a plurality of sampling buckets 2 being fixedly connected on both sides of the middle hanging rod 303, both ends of the hanging support frame 1 being rotatably connected to a connecting shaft 301, a plurality of layered plates 302 being fixedly connected to the surfaces of the two connecting shafts 301, a plurality of sampling buckets 2 being separated by the plurality of layered plates 302, a multi-layer sealed space can be formed to separate samples of different depths, the bottom end of the connecting shaft 301 is fixedly connected to a bottom watertight plate 304, which is used to cooperate with the layered plate 302 to seal the lowest sampling bucket 2.
[0036] Among them, the top ends of the two connecting shafts 301 are fixedly connected with a first sprocket 306, and the two first sprockets 306 are connected by a first chain 305 for power transmission to drive the connecting shaft 301 to rotate. The surface of the suspension support frame 1 is fixedly connected with a first motor 307, which can be used as a power source to realize automatic stratification of samples. The output shaft of the first motor 307 is fixedly connected to the middle part of the upper surface of one of the first sprockets 306. The multiple stratification plates 302 are respectively located at the top ends of the multiple sampling buckets 2, and the bottom water barrier 304 is located at the bottom of the lowest sampling bucket 2.
[0037] By adopting the above technical solution, when sampling a water body for subsequent analysis, the ship is driven above the water body where sampling is required, and then the suspension support frame 1 is mounted on the edge of the hull, and multiple sampling buckets 2 can be set inside the water body. When the sampling buckets 2 are located inside the water body, they need to be placed vertically downward to reduce disturbance to the water flow.
[0038] Next, start the first motor 307, and use the first motor 307 to drive one of the first sprockets 306 to rotate, and use the transmission of the first chain 305 to drive the other first sprocket 306 to rotate synchronously, so as to drive the two connecting shafts 301 to rotate synchronously. When the connecting shaft 301 rotates, it can drive the two bottom water-blocking plates 304 to move to the bottom of the lowest sampling bucket 2, and at the same time, multiple layering plates 302 move to the top of the corresponding sampling bucket 2. The multiple sampling buckets 2 are separated by multiple layering plates 302, so that a multi-layer sealed space can be formed to separate samples of different depths. In this way, when the sampling bucket 2 is taken out of the water body, even if the samples in the closed space after stratification are mixed, due to the stratification, only the stratified parts are mixed, and there will be no mixing of samples in a larger depth area. Therefore, in the subsequent analysis, facing the need for monitoring at different depths, the error range provided by the sample is smaller, reducing the impact on the water environment quality assessment.
[0039] like Figure 2 、 Figure 4 、 Figure 5 and Figure 6 As shown, multiple sampling buckets 2 are grouped in pairs, and a water outlet pipe 401 and a water inlet pipe 406 are fixedly inserted inside the two sampling buckets 2. The water outlet pipes 401 and the water inlet pipes 406 on the two sampling buckets 2 are staggered up and down, and a guide pipe 419 is installed between the water inlet pipe 406 and the water outlet pipe 401. The interior of the guide pipe 419 is rotatably connected to a turbine blade 418, and the surface of the turbine blade 418 is fixedly connected to a plurality of passive magnet blocks 404. The surface of the guide pipe 419 is rotatably sleeved with a second sprocket 403, and the surface of the second sprocket 403 is fixedly connected to a plurality of active magnet blocks 405. The active magnet block 405 and the passive magnet block 404 are attracted to each other by magnetic force, and the turbine blade 418 can be driven to rotate without contact.
[0040] Among them, both sides of the middle part of the suspension support frame 1 are fixedly connected with a pendant frame 408, and the top end of the pendant frame 408 is rotatably connected to the third sprocket 420. The third sprocket 420 and multiple second sprockets 403 are connected through a second chain 402, which can transmit the power generated by the second motor 417. The top end of the pendant frame 408 is fixedly connected with the second motor 417, and the output shaft of the second motor 417 is fixedly connected to the third sprocket 420. The surface of the pendant frame 408 is rotatably connected with multiple pressure sprockets 407, which can prevent the second sprocket 403 from loosening. The internal rotation of the layered plate 302 is provided with two long shafts 410.
[0041] Among them, the surfaces of the two long shafts 410 are fixedly connected with spoilers 409, which can be used to disrupt the flow of water samples inside the sampling barrel 2, speed up the mixing speed of the water samples and make them more uniform, and speed up the speed at which the water samples return to calm. The same end of the two long shafts 410 is fixedly connected with a transmission gear 411, and the two transmission gears 411 are meshed with each other. The side of the suspension support frame 1 is fixedly connected with a transverse frame 414, and the longitudinal arm end of the transverse frame 414 is provided with a transverse bracket 413. The surface of the transverse bracket 413 Two racks 412 are fixedly connected, and the racks 412 are meshed with one of the corresponding transmission gears 411. A return spring 415 is fixedly connected to the lower surface of the transverse bracket 413, and the return spring 415 drives the transverse bracket 413 to move upward, thereby causing the spoiler 409 to rotate again to fit into the inside of the layered plate 302 without disturbing the flow of the water sample, so as to perform water sampling operations. The bottom end of the return spring 415 is fixedly connected to the transverse arm end of the transverse bracket 414, and the rear end of the transverse bracket 413 is fixedly connected to a handle 416.
[0042] By adopting the above technical solution, after the sampling of the water body is completed through multiple sampling buckets 2, if it is necessary to analyze the samples at a specified depth, the third sprocket 420 is driven to rotate by the second motor 417, and the multiple second sprockets 403 are synchronously driven to rotate through the transmission of the second chain 402. Since the active magnet block 405 and the passive magnet block 404 attract each other through magnetic force, when the second sprocket 403 drives the active magnet block 405 to move, the passive magnet block 404 is also driven to rotate, thereby driving the turbine blades 418 to rotate. The rotation of the turbine blades 418 can drive the water sample to circulate between the two sampling buckets 2 at the same layer, thereby achieving mixing of the samples, making the suspended matter, sediment or dissolved substances at the specified depth evenly distributed, and reducing sampling deviation.
[0043] Due to the directional diversion effect of the water outlet pipe 401, the water sample contacts and impacts the inner wall of the sampling barrel 2 when flowing inside the sampling barrel 2, which can cause the water sample to rotate and flow in the sampling barrel 2. Therefore, the staff holds the handle 416 to press down the horizontal bracket 413. At this time, the return spring 415 is in a compressed state, which can make the rack 412 move downward, thereby driving the two transmission gears 411 to rotate in opposite directions, thereby driving the two spoilers 409 to rotate to a vertical state, and the spoiler 409 can be used to disrupt the flow of the water sample inside the sampling barrel 2, accelerating the mixing speed of the water sample while making it more uniform. When the mixing stops, the speed at which the water sample returns to calm can be accelerated for sampling and analysis. When the handle 416 is released, the return spring 415 drives the horizontal bracket 413 to move upward, thereby causing the spoiler 409 to rotate again to fit the inside of the stratification plate 302 and no longer disturb the flow of the water sample, so as to carry out the water sampling operation.
[0044] like Figure 7 and Figure 8 As shown, two filter screens 501 are inserted into the interior of the water inlet pipe 406, through which large impurities such as water plants can be filtered and separated. The top of the water inlet pipe 406 is fixedly connected to two extraction tubes 503, and the tops of the two filter screens 501 are respectively located inside the two extraction tubes 503. The top of the extraction tube 503 is threadedly sleeved with a sealing cover 502, and the inner top of the sealing cover 502 is rotatably connected to a rotating shaft 507. The lower end of the shaft 507 is rotatably connected to a clamping block 506, which is clamped with the filter screen plate 501. A rubber sealing airbag 505 is provided inside the extraction tube 503. When the filter screen plate 501 is pulled out from the water inlet pipe 406, the gap in the middle of the rubber sealing airbag 505 will be blocked again to prevent the water sample from flowing out. The side of the rubber sealing airbag 505 is connected to an air nozzle 504, which is fixedly inserted into the interior of the extraction tube 503.
[0045] By adopting the above technical solution, when the water sample flows inside the two sampling barrels 2, the water sample enters from the water inlet pipe 406 and then flows out from the water outlet pipe 401. Therefore, the water plants and other large impurities can be filtered and separated through the filter plate 501, preventing the water plants and other large impurities from clogging the instrument during analysis. Because the impurities are too large, a large amount of impurities are easily accumulated on the surface of the filter plate 501, causing the filter plate 501 to be blocked. Therefore, the sealing cover 502 is removed, and during this process, the filter plate 501 can be pulled out from the water inlet pipe 406 as the sealing cover 502 is detached. Since the rubber sealing airbag 505 is filled with air with high pressure, when the filter plate 501 is pulled out from the water inlet pipe 406, the gap in the middle of the rubber sealing airbag 505 will be blocked again to prevent the water sample from flowing out. At this time, the water sample can be filtered by another filter plate 501, thereby preventing the need to suspend the flow of water samples during the replacement and cleaning of the filter plate 501, thereby affecting the mixing and filtration efficiency.
[0046] Instructions: First, move the boat to the water body where sampling is required;
[0047] Next, the suspension support frame 1 is mounted on the edge of the hull, and multiple sampling buckets 2 can be placed vertically downward into the water body to perform water sampling;
[0048] Next, the first motor 307 is started to drive the multiple stratification plates 302 to move above the corresponding sampling barrels 2 to separate the multiple sampling barrels 2, thus completing the sample stratification.
[0049] Then, the sampling bucket 2 containing the sample is taken out from the water body;
[0050] Subsequently, the second motor 417 drives the turbine blades 418 to rotate, driving the water sample to circulate between the two sampling barrels 2 on the same layer, thereby achieving mixing of the sample;
[0051] At the same time, pressing down the transverse bracket 413 can rotate the two spoilers 409 to a vertical state, disrupting the flow of the water sample inside the sampling barrel 2;
[0052] Finally, the samples in the corresponding stratified sampling barrel 2 are analyzed by an analytical instrument.
[0053] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.
Claims
1. An automated sampling and analysis device for water quality monitoring, comprising a suspension support frame (1), characterized in that: A sampling mechanism is provided on the surface of a suspension support frame (1), the sampling mechanism comprising a middle suspension rod (303) fixedly connected to the middle of the suspension support frame (1), a plurality of sampling barrels (2) fixedly connected to both sides of the middle suspension rod (303), a connecting shaft (301) rotatably connected to both ends of the suspension support frame (1), a plurality of layered plates (302) fixedly connected to the surfaces of the two connecting shafts (301), a bottom water baffle (304) fixedly connected to the bottom ends of the connecting shafts (301), a first sprocket (306) fixedly connected to the top ends of the two connecting shafts (301), the two first sprockets (306) being connected in transmission via a first chain (305), a first motor (307) fixedly connected to the surface of the suspension support frame (1), an output shaft of the first motor (307) fixedly connected to the middle of the upper surface of one of the first sprockets (306).
2. The automated sampling and analysis device for water quality monitoring according to claim 1, characterized in that: The plurality of layered plates (302) are respectively located at the top ends of the plurality of sampling barrels (2), and the bottom water barrier plate (304) is located at the bottom of the lowest sampling barrel (2).
3. The automated sampling and analysis device for water quality monitoring according to claim 1, characterized in that: The plurality of sampling barrels (2) are grouped in pairs, and a water outlet pipe (401) and a water inlet pipe (406) are fixedly inserted into the interior of the two sampling barrels (2). The water outlet pipes (401) and the water inlet pipes (406) of the two sampling barrels (2) are arranged in an up-and-down staggered manner. A guide pipe (419) is installed between the water inlet pipe (406) and the water outlet pipe (401). The interior of the guide pipe (419) is rotatably connected to a turbine blade (418). The surface of the turbine blade (418) is fixedly connected to a plurality of passive magnet blocks (404). The surface of the guide pipe (419) is rotatably sleeved with a second sprocket (403). The second The surface of the sprocket (403) is fixedly connected to a plurality of active magnet blocks (405); both sides of the middle portion of the suspension support frame (1) are fixedly connected to a drooping frame (408); the top end of the drooping frame (408) is rotatably connected to a third sprocket (420); the third sprocket (420) and the plurality of second sprockets (403) are transmission-connected via a second chain (402); the top end of the drooping frame (408) is fixedly connected to a second motor (417); the output shaft of the second motor (417) is fixedly connected to the third sprocket (420); and the surface of the drooping frame (408) is rotatably connected to a plurality of pressure sprockets (407).
4. The automated sampling and analysis device for water quality monitoring according to claim 1, characterized in that: Two long shafts (410) are rotatably inserted inside the layered plate (302), and spoilers (409) are fixedly connected to the surfaces of the two long shafts (410).
5. The automated sampling and analysis device for water quality monitoring according to claim 4, characterized in that: The same end of the two long shafts (410) is fixedly connected to a transmission gear (411), and the two transmission gears (411) are meshed with each other. The side of the suspension support frame (1) is fixedly connected to a transverse frame (414), and the longitudinal arm end of the transverse frame (414) is sleeved with a transverse bracket (413). The surface of the transverse bracket (413) is fixedly connected to two racks (412), and the rack (412) is meshed with one of the corresponding transmission gears (411).
6. The automated sampling and analysis device for water quality monitoring according to claim 5, characterized in that: A return spring (415) is fixedly connected to the lower surface of the transverse bracket (413), the bottom end of the return spring (415) is fixedly connected to the transverse arm end of the transverse bracket (414), and a handle (416) is fixedly connected to the rear end of the transverse bracket (413).
7. The automated sampling and analysis device for water quality monitoring according to claim 3, characterized in that: Two filter screens (501) are inserted into the water inlet pipe (406).
8. The automated sampling and analysis device for water quality monitoring according to claim 7, characterized in that: The top end of the water inlet pipe (406) is fixedly connected to two extraction pipes (503), the top ends of the two filter screens (501) are respectively located inside the two extraction pipes (503), and the top ends of the extraction pipes (503) are threadedly sleeved with sealing covers (502).
9. The automated sampling and analysis device for water quality monitoring according to claim 8, characterized in that: The inner top end of the sealing cover (502) is rotatably connected to a rotating shaft (507), and the lower end of the rotating shaft (507) is rotatably connected to a clamping block (506), and the clamping block (506) is clamped to the filter screen plate (501).
10. The automated sampling and analysis device for water quality monitoring according to claim 8, characterized in that: A rubber-sealed airbag (505) is provided inside the extraction tube (503), and a side of the rubber-sealed airbag (505) is connected to an air nozzle (504), which is fixedly inserted into the interior of the extraction tube (503).