A water quality monitoring device and system for a closed basin

Abstract

The present invention discloses a water quality monitoring device and system for a closed basin, including a housing and adjusting rods. The lower end of the housing is connected to a plurality of adjusting rods, and the plurality of adjusting rods are slidably connected. A depth adjusting component capable of adapting to different basin depths is provided inside the housing and the adjusting rods. One end of a connecting rod is fixedly connected to one side of each adjusting rod, and the other end of the connecting rod is fixedly connected to a base. A detection block can be arranged on the base, and a locking component capable of fixedly connecting the detection block is arranged inside the base. A linkage component capable of simultaneously driving a plurality of locking components to operate synchronously is arranged at the lower end of the housing. By replacing different detection blocks, the present invention can ensure that when detecting different water quality information, data with the smallest error can be provided; at the same time, the height of the water quality monitoring device itself can be adjusted according to different depths of the basin; and at the same time, different detection blocks can be fixedly connected synchronously, which is convenient for personnel operation, reduces the burden on personnel, and improves the monitoring efficiency.

Description

Technical Field

[0001] The present invention relates to the field of water quality monitoring, and specifically to a water quality monitoring device and system for a closed basin. Background Art

[0002] Under the background of global ecological environment change, the diversity, stability and sustainability of grassland ecosystems in China have been severely affected. Therefore, it is urgent to carry out basic research on aspects such as water cycle, carbon and nitrogen cycle, and eco-hydrology to support the protection and restoration of grassland ecosystems. Aiming at the basic frontiers of unclear coupling mechanisms of grassland eco-hydrological processes and the need for innovation in eco-hydrological regulation methods, taking the coupling mechanism of grassland eco-hydrology and its response and adaptation to climate change and human activities as the main line, identifying key eco-hydrological processes and their spatio-temporal cumulative effects in typical grassland basins, revealing the mutual feedback relationship between water-heat-carbon-nitrogen fluxes in grassland ecosystems and the biological driving and environmental control mechanisms, clarifying the coupling mechanism of carbon and nitrogen cycles and hydrological processes in small watershed grassland landscapes, defining the instability threshold of the watershed eco-hydrological system, and conducting experiments on the transformation relationship between atmospheric precipitation-plant water-soil water-surface water-groundwater at the watershed scale using isotope tracer methods. Thus, more targeted appropriate management strategies and regulation approaches that coordinate the sustainable development of animal husbandry and the maintenance of a good relationship with the eco-hydrological system are proposed, providing a scientific basis for the sustainable use of grasslands.

[0003] Therefore, in order to reveal the environmental control mechanism of grassland basin ecosystems, the cumulative effects of the evolution of watershed eco-hydrological processes, the two-way coupling mechanism model of small watershed grassland landscape eco-hydrology, and conduct experiments using isotope tracer methods, a device capable of monitoring data for grassland basins is urgently needed to facilitate the revelation of corresponding results; however, when different issues need to be addressed, different monitoring devices are often required to monitor different water quality information within the basin; at the same time, when conducting experiments using isotope tracer methods, the monitoring devices will be affected by isotopes, resulting in deviations and errors in subsequent monitoring results, further leading to errors or mistakes in the revealed mechanisms, effects, and models, and ultimately resulting in poor governance effects on grassland basins.

[0004] There are already some water quality monitoring devices for water quality monitoring. For example, in the patent with the publication number CN109324163B, a modular hydrological and water quality monitoring device is provided. When this water quality monitoring device is used, it realizes the fitting of the device to the river channel profile by manually installing different sheet rods; at the same time, the device realizes the detection of different data of the river channel by manually installing hydrological monitors equipped with different monitoring devices on different sheet rods. Manual installation takes a long time and is not convenient. Summary of the Invention

[0005] The object of the present invention is to provide a closed watershed water quality monitoring device and system to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a closed basin water quality monitoring device and system, comprising a shell and an adjusting rod, wherein the lower end of the shell is connected to a plurality of adjusting rods, the plurality of adjusting rods are slidably connected, and a depth adjustment component capable of adapting to different basin depths is arranged in the shell and the adjusting rod, one side of each adjusting rod is fixedly connected to one end of a connecting rod, and the other end of the connecting rod is fixedly connected to a base, a detection block can be arranged on the base, a locking component capable of fixing the detection block is arranged in the base, a plurality of different monitoring devices are fixedly connected in the detection block, and a linkage component capable of simultaneously driving a plurality of locking components to operate synchronously is arranged at the lower end of the shell;

[0007] The lower end of the housing is provided with a plurality of slidably connected linkage rods in the linkage assembly, the linkage rods are connected to a plurality of locking gears in the base through a chain drive, the locking gears are meshed with the outer side of the locking gear ring, the inner side of the locking gear ring is meshed with a plurality of compression gears of the locking assembly, and the compression gears can drive the fastening rings arranged therein to fix the detection block;

[0008] The base is rotatably connected to the mating gear 2, one side of the mating gear 2 is meshed with the mating gear 1 and the mating rack 2, the other side of the mating gear 2 is meshed with the toggle rack, the other side of the mating gear 1 is meshed with the mating rack 1, the mating rack 1, the mating rack 2 and the toggle rack are slidably connected in the base, the mating gear 1 and the mating gear 2 are rotatably connected in the base, both ends of the toggle rack are fixedly connected to a toggle rod, and each toggle rod is rotatably connected to the locking gear;

[0009] A spring is fixedly connected between the first matching rack and the base, and another spring is fixedly connected between the second matching rack and the base.

[0010] Preferably, the depth adjustment assembly includes a movable pulley, an adjusting rod fixedly connected to the lower end of the shell, the lower end of the adjusting rod is slidably connected to several adjusting rods in sequence, the inner part of the lowermost adjusting rod is rotationally connected to the movable pulley, and the inner part of the shell is rotationally connected to the fixed pulley, the shell is also fixedly connected to a rope winding motor, the output shaft of the rope winding motor is fixedly connected to the rope winding shaft, one end of the rope is fixedly connected to the rope winding shaft, and the other end of the rope first passes through the fixed pulley, then passes through the movable pulley, and is finally fixed to the shell.

[0011] Preferably, the locking assembly includes a fastening ring, which is rotatably connected to a locking gear ring in the base, a compression ring is fixedly connected to the compression gear, the compression ring is threadedly connected to the fastening ring, the fastening ring is fixedly connected to the base, and a plurality of grooves are arranged on the upper end of the fastening ring.

[0012] Preferably, two sprockets are rotatably connected inside the base, the two sprockets are connected by a chain drive, a clamping disc is fixedly connected below the sprocket close to the locking gear ring, several limiting blocks are fixedly connected to the lower end of the clamping disc, a locking gear is arranged below the clamping disc, several limiting grooves are arranged above the locking gear, and the limiting blocks can be inserted into the limiting grooves.

[0013] Preferably, the linkage assembly includes a linkage rod, a linkage motor of the linkage assembly is fixedly connected inside the housing, an output shaft of the linkage motor is fixedly connected with a linkage gear, a linkage rod is fixedly connected to the lower end of the linkage gear, the lower end of the linkage rod is sequentially slidably connected with several linkage rods, and the lower end of each linkage rod is fixedly connected with a sprocket inside a base away from the locking gear ring.

[0014] Preferably, a guide rod is also fixedly connected inside the base, and the guide rod extends out of the base.

[0015] Preferably, a fixing plate is fixedly connected to one end of the housing.

[0016] Preferably, several fastening rods are arranged at the lower end of the detection block, and the fastening rods can extend into the fastening circle.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: by arranging several bases and detection blocks, different detection blocks can be replaced when dealing with different topics, so as to ensure that when detecting different information of water quality, data with the smallest error can be provided, and it is ensured that the revealed mechanisms, effects and models can reflect the accurate situation of the grassland watershed ecosystem, which is convenient for carrying out treatment effects; at the same time, after carrying out experiments using the isotope tracing method, different detection blocks can be replaced to avoid the influence of residual isotopes on the subsequent topics; at the same time, the present invention is provided with a depth adjustment component, which can adjust the height of the water quality monitoring device itself for watersheds at different depths, so that the same water quality monitoring device can be applied to different watersheds, saving funds and facilitating operation; at the same time, the present invention is provided with a linkage component and a locking component, which can fix different detection blocks at the same time, facilitating personnel operation, reducing the burden on personnel and improving the monitoring efficiency. Description of the Drawings

[0018] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 is a cross-sectional view of the middle part of the present invention;

[0020] Figure 3 is a cross-sectional view of the base position of the present invention;

[0021] Figure 4 is the present invention Figure 2 is a partial enlarged view of part A in;

[0022] Figure 5 It is a cross-sectional view of the present invention at the position of the limit rod;

[0023] Figure 6 It is a structural schematic diagram of the locking gear of the present invention;

[0024] Figure 7 It is a cross-sectional view of the present invention at the position of the fastening ring;

[0025] Figure 8 It is a cross-sectional view of the present invention at the position of shifting the rack;

[0026] Figure 9 For the present invention Figure 2 A partial enlarged view of point B in the middle;

[0027] Figure 10 For the present invention Figure 2 A partial enlarged view of point C in the middle;

[0028] Figure 11 It is a structural schematic diagram of the detection block of the present invention;

[0029] Figure 12 It is a schematic diagram of the structure in which the detection block of the present invention is installed on the base.

[0030] In the figure: 101, housing, 102, adjusting rod, 103, fixing plate, 201, rope winding motor, 202, rope winding shaft, 203, fixed pulley, 204, movable pulley, 205, rope, 301, linkage motor, 302, linkage gear, 303, sprocket, 304, chain, 305, clamping plate, 306, limit block, 307, limit groove, 308, locking gear, 309, locking Gear ring, 310, linkage rod, 401, fastening ring, 402, pressure ring, 403, pressure gear, 501, matching rack one, 502, matching rack two, 503, matching gear one, 504, matching gear two, 505, toggle rack, 506, toggle rod, 507, spring, 601, connecting rod, 602, base, 603, guide rod, 604, detection block, 605, fastening rod. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-12, to solve the problem that different monitoring devices need to be used to monitor different water quality information in the basin when solving different problems; at the same time, the traditional water quality monitoring device requires manual adjustment of the length and manual installation of different monitoring devices, resulting in a long installation time and inconvenient installation. To achieve the effect that different detection blocks 604 can be replaced when dealing with different problems; at the same time, the height of the water quality monitoring device can be conveniently adjusted, and different detection blocks 604 can be fixed, facilitating personnel operation and improving the monitoring efficiency. The present invention provides a technical solution: a closed basin water quality monitoring device and system, including a housing 101 and an adjusting rod 102. The lower end of the housing 101 is connected to a plurality of adjusting rods 102, and the plurality of adjusting rods 102 are slidably connected. A depth adjusting component capable of adapting to different basin depths is provided inside the housing 101 and the adjusting rods 102. One end of a connecting rod 601 is fixedly connected to one side of each adjusting rod 102, and the other end of the connecting rod 601 is fixedly connected to a base 602. A detection block 604 can be arranged on the base 602. A locking component capable of fixedly connecting the detection block 604 is provided inside the base 602. A linkage component capable of simultaneously driving a plurality of locking components to operate synchronously is provided at the lower end of the housing 101, which can perform rapid synchronous locking and can also perform rapid synchronous unlocking; one end of the housing 101 is fixedly connected to a fixing plate 103; a guide rod 603 is also fixedly connected inside the base 602, and the guide rod 603 extends out of the base 602; a plurality of fastening rods 605 are provided at the lower end of the detection block 604, and the fastening rods 605 can extend into the fastening ring 401. The base 602 is provided with a hole at the position of the fastening ring 401. In this application, the rope winding motor 201 and the linkage motor 301 both adopt existing models.

[0033] When in use, first confirm the depth at the position where the water quality monitoring device needs to be installed in the basin in advance, and then adjust the height of the water quality monitoring device through the depth adjusting component. Figure 1-2The water quality monitoring device shown is in its longest state. When it is necessary to shorten the length of the water quality monitoring device, some of the bases 602 at the lower end of the water quality monitoring device will be connected to each other, but the bases 602 at the upper end of the water quality monitoring device remain unchanged. Then, a detection block 604 is installed on each of the unchanged bases 602. Then, the linkage component is activated. The linkage component controls the locking component in the unchanged bases 602 to fixedly connect the detection block 604 to the bases 602, but the linkage component does not control the locking components in the bases 602 that are connected to each other at the lower end of the water quality monitoring device. This can prevent the fastening ring 401 from being deformed too much when there is no device to be fixed in the fastening ring 401, and can effectively avoid the parts in the locking component from being worn, thus extending the service life of the parts. Then, the water quality monitoring device is placed at the position to be monitored. Finally, the fixing plate 103 is installed on the shore or other monitoring bases, such as ships, bridge bodies, etc. by means of fixation including but not limited to bolts; when it is necessary to replace the detection block 604, after taking out the water quality monitoring device, just replace the detection block 604; when the length of the water quality monitoring device is shortened to the shortest, at this time, the volume of the water quality monitoring device is small, which is convenient for personnel to transport and reduces the transportation pressure; the monitoring equipment in the detection block 604 includes, but is not limited to, a pH monitor, an ammonia nitrogen detector, a temperature monitor, a BOD detector, and other monitoring equipment that can monitor the water quality information in the basin, or monitoring equipment that can assist in solving the problem.

[0034] To achieve the effect that the water quality monitoring device can adapt to the depth of the position to be monitored in the basin, a depth adjustment component is provided. The depth adjustment component includes a movable pulley 204. A regulating rod 102 is fixedly connected to the lower end of the housing 101. The lower end of this regulating rod 102 is sequentially slidably connected to several regulating rods 102. The movable pulley 204 is rotatably connected inside the lowermost regulating rod 102. A fixed pulley 203 is rotatably connected inside the housing 101. A rope winding motor 201 is also fixedly connected inside the housing 101. The output shaft of the rope winding motor 201 is fixedly connected to a rope winding shaft 202. One end of a rope 205 is fixedly connected to the rope winding shaft 202. The other end of the rope 205 first passes through the fixed pulley 203, then passes through the movable pulley 204, and finally is fixed inside the housing 101.

[0035] When the height of the water quality monitoring device needs to be adjusted, the rope winding motor 201 is first started, the rope winding motor 201 drives the rope winding shaft 202 to rotate, the rope winding shaft 202 pulls the rope 205 to start winding, the rope 205 pulls the movable pulley 204 to start rising, and the movable pulley 204 drives the lowermost adjusting rod 102 to rise. Except for the lowermost adjusting rod 102, the top of each adjusting rod 102 is fixedly connected to the limit platform. When the lowermost adjusting rod 102 contacts the limit platform of the adjacent adjusting rod 102, the lowermost adjusting rod 102 is raised. The adjusting rod 102 at the lower end will drive the adjacent adjusting rod 102 to continue to rise, the rope winding motor 201 will continue to run, and the height of the water quality monitoring device will continue to decrease. When the height of the water quality monitoring device meets the depth of the monitoring position, the rope winding motor 201 will be turned off to complete the height adjustment of the water quality monitoring device; the position of the guide rod 603 on each base 602 is different, so during the adjustment process, the guide rod 603 on the lower base 602 will enter the hole of the upper base 602 to ensure the matching effect.

[0036] In order to achieve the effect of synchronously locking several detection blocks 604 and facilitating personnel operation, a linkage component and a locking component are provided. The linkage component includes a linkage rod 310, which is fixedly connected to the linkage motor 301 in the shell 101, and the output shaft of the linkage motor 301 is fixedly connected to the linkage gear 302. The lower end of the linkage gear 302 is fixedly connected to a linkage rod 310, and the lower end of the linkage rod 310 is slidably connected to several linkage rods 310 in turn, and the lower end of each linkage rod 310 is fixedly connected to a sprocket 303 in a base 602 away from the locking gear ring 309; the locking component includes a locking gear ring 309, which is rotatably connected to the locking gear ring 309 in the base 602, and the inner side of the locking gear ring 309 is meshed if There are a plurality of compression gears 403, a compression ring 402 is fixedly connected inside the compression gear 403, a fastening ring 401 is threadedly connected inside the compression ring 402, the fastening ring 401 is fixedly connected inside the base 602, and a plurality of grooves are arranged at the upper end of the fastening ring 401; two sprockets 303 are also rotatably connected inside the base 602, and the two sprockets 303 are connected through a chain 304 for transmission, a clamping disk 305 is fixedly connected below the chain 304 near the locking gear ring 309, a plurality of limit blocks 306 are fixedly connected at the lower end of the clamping disk 305, a locking gear 308 is arranged below the clamping disk 305, a plurality of limit grooves 307 are arranged above the locking gear 308, and the limit blocks 306 can be inserted into the limit grooves 307.

[0037] When it is necessary to fix several detection blocks 604, firstly, several fastening rods 605 of the detection blocks 604 are correspondingly inserted into several holes on the base 602, and then the linkage motor 301 is started, the linkage motor 301 drives the linkage gear 302 to rotate, the linkage gear 302 drives several linkage rods 310 at the lower end to rotate, each linkage rod 310 drives the sprocket 303 connected thereto to rotate, the sprocket 303 drives another sprocket 303 to rotate through the chain 304, the other sprocket 303 drives the clamping plate 305 to rotate, the clamping plate 305 drives the limit block 306 to rotate, the limit block 306 drives the locking gear 308 to rotate, the locking gear 308 drives the locking gear ring 309 to rotate, and the locking gear ring 309 drives Several compression gears 403 are driven to rotate, and the compression gears 403 drive the compression ring 402 to rotate, and the compression ring 402 begins to move spirally on the fastening ring 401. The interior of the compression ring 402 is provided with an inclined surface, and the upper end of the fastening ring 401 is provided with an inclined platform. Therefore, the compression ring 402 compresses the fastening ring 401 to tighten, and the fastening ring 401 fixes the fastening rod 605; wherein, the width of the compression gear 403 is wider than the width of the locking gear ring 309, so when the compression gear 403 moves, it can ensure that the compression gear 403 is always engaged with the locking gear ring 309; at the same time, another sprocket 303 in the base 602 connected to each other at the lower end will also drive the clamping disk 305 to rotate, but the clamping disk 305 will not drive the locking gear 308 to rotate.

[0038] In order to avoid the fastening ring 401 from being damaged due to excessive deformation, a toggle rack 505 is provided, which is rotatably connected to the matching gear 2 504 in the base 602, one side of the matching gear 2 504 is meshed with the matching gear 1 503 and the matching rack 2 502, and the other side of the matching gear 2 504 is meshed with the toggle rack 505, and the other side of the matching gear 1 503 is meshed with the matching rack 1 501, the matching rack 1 501, the matching rack 2 502 and the toggle rack 505 are slidably connected in the base 602, the matching gear 1 503 and the matching gear 2 504 are rotatably connected in the base 602, and both ends of the toggle rack 505 are fixedly connected to a toggle rod 506, and each toggle rod 506 is rotatably connected to the locking gear 308; a spring 507 is fixedly connected between the matching rack 1 501 and the base 602, and another spring 507 is fixedly connected between the matching rack 2 502 and the base 602.

[0039] When the adjusting rod 102 moves, the adjusting rod 102 drives the connecting rod 601 to move, and the connecting rod 601 drives the base 602 to move, and the two adjacent bases 602 approach each other. When the matching rack 1 501 contacts the adjacent base 602, the matching rack 1 501 starts to move, and the matching rack 1 501 drives the matching gear 1 503 to rotate, and the matching gear 1 503 drives the matching gear 2 504 to rotate, and the matching gear 2 504 drives the matching rack 2 502 to retract, and at the same time, the matching gear 2 504 drives the toggle rack 505 to move, and the toggle rack 505 drives the toggle rod 506 to move, and the toggle rod 50 6 drives the locking gear 308 to move, the locking gear 308 is away from the clamping plate 305, and the limiting groove 307 is away from the limiting block 306. At this time, the sprocket 303 cannot drive the locking gear 308 to rotate; when the matching rack 2 502 contacts the adjacent base 602, the matching rack 2 502 drives the matching gear 2 504 to rotate, and the matching gear 2 504 drives the locking gear 308 to move, and at the same time, the matching gear 2 504 drives the matching gear 1 503 to rotate, and the matching gear 1 503 drives the matching rack 1 501 to retract; when the water quality monitoring device recovers its height, the adjusting rod 102 drives the bases 602 that are in contact with each other. When the locking gear 308 is not connected to the clamping plate 305, the sprocket 303 drives the clamping plate 305 to rotate, and the clamping plate 305 drives the limit block 306 to rotate, resulting in a change in the position of the limit block 306. The limit block 306 may not be able to directly enter the limit slot 307. Therefore, an arc is made between adjacent limit slots 307. When the limit slots 307 are not connected to the clamping plate 305, the sprocket 303 drives the clamping plate 305 to rotate, and the clamping plate 305 drives the limit block 306 to rotate, resulting in a change in the position of the limit block 306. The limit block 306 may not be able to directly enter the limit slot 307. Therefore, an arc is made between adjacent limit slots 307. After contacting the limit block 306, the limit slot 307 makes adaptive rotation according to the position of the limit block 306, so that the limit block 306 cooperates with the limit slot 307. Since the number of limit slots 307 is relatively large, the rotation angle of the limit slot 307 is relatively small, and the angle of the pressure gear 403 driven to rotate is relatively small, which will not affect the cooperation of the guide rod 603 and the cooperation of the fastening rod 605 next time; during the movement of the locking gear 308, since the width of the locking gear 308 is wider than the width of the locking gear ring 309, the locking gear 308 can always keep meshing with the locking gear ring 309.

[0040] Sealing rings are provided at different connection parts of the water quality monitoring device, including but not limited to the connection part between the locking gear ring 309 and the base 602, the connection part between adjacent adjusting rods 102, the connection part between the linkage rod 310 and the housing 101, the connection part between adjacent linkage rods 310, the connection part between the mating rack one 501 and the base 602, and the connection part between the mating rack two 502 and the base 602. The sealing ring is composed of parts that can play a sealing role, including but not limited to oil seal felt rings, and the oil seal felt rings adopt existing models.

[0041] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A closed basin water quality monitoring device, comprising a housing (101) and an adjusting rod (102), characterized in that: The lower end of the shell (101) is connected to a plurality of adjustment rods (102), the plurality of adjustment rods (102) are slidably connected, a depth adjustment component capable of adapting to different watershed depths is arranged in the shell (101) and the adjustment rods (102), one side of each adjustment rod (102) is fixedly connected to one end of a connecting rod (601), the other end of the connecting rod (601) is fixedly connected to a base (602), a detection block (604) can be arranged on the base (602), a locking component capable of fixing the detection block (604) is arranged in the base (602), a plurality of different monitoring devices are fixedly connected in the detection block (604), and a linkage component capable of simultaneously driving a plurality of locking components to operate synchronously is arranged at the lower end of the shell (101); The lower end of the housing (101) is provided with a plurality of slidably connected linkage rods (310) in the linkage assembly, the linkage rods (310) are connected to a plurality of locking gears (308) in the base (602) through a chain drive, the locking gears (308) are meshed with the outer side of the locking gear ring (309), the inner side of the locking gear ring (309) is meshed with a plurality of compression gears (403) of the locking assembly, and the compression gear (403) is capable of driving a fastening ring (401) provided therein to fix the detection block (604); The base (602) is rotatably connected to the matching gear 2 (504), one side of the matching gear 2 (504) is meshed with the matching gear 1 (503) and the matching rack 2 (502), the other side of the matching gear 2 (504) is meshed with the toggle rack (505), the other side of the matching gear 1 (503) is meshed with the matching rack 1 (501), the matching rack 1 (501), the matching rack 2 (502) and the toggle rack (505) are slidably connected in the base (602), the matching gear 1 (503) and the matching gear 2 (504) are rotatably connected in the base (602), both ends of the toggle rack (505) are fixedly connected to a toggle rod (506), and each toggle rod (506) is rotatably connected to the locking gear (308); A spring (507) is fixedly connected between the first mating rack (501) and the base (602), and another spring (507) is fixedly connected between the second mating rack (502) and the base (602).

2. A closed basin water quality monitoring device according to claim 1, characterized in that: The depth adjustment assembly comprises a movable pulley (204); the lower end of the housing (101) is fixedly connected to an adjustment rod (102); the lower end of the adjustment rod (102) is slidably connected to a plurality of adjustment rods (102) in sequence; the lowermost adjustment rod (102) is rotatably connected to the movable pulley (204) inside, and is rotatably connected to the fixed pulley (203) inside the housing (101); the housing (101) is also fixedly connected to a rope winding motor (201); the output shaft of the rope winding motor (201) is fixedly connected to a rope winding shaft (202); one end of a rope (205) is fixedly connected to the rope winding shaft (202); the other end of the rope (205) first passes through the fixed pulley (203), then passes through the movable pulley (204), and is finally fixed to the housing (101).

3. A closed basin water quality monitoring device according to claim 1, characterized in that: The locking assembly comprises a fastening ring (401), a locking gear ring (309) rotatably connected inside the base (602), a pressing gear (403) fixedly connected inside the pressing ring (402), an internal thread of the pressing ring (402) connected to the fastening ring (401), the fastening ring (401) fixedly connected inside the base (602), and a plurality of grooves being arranged at the upper end of the fastening ring (401).

4. A closed basin water quality monitoring device according to claim 1, characterized in that: The base (602) is rotatably connected to two sprocket wheels (303), which are connected by a chain (304). A clamping plate (305) is fixedly connected below the sprocket wheel (303) near the locking gear ring (309), and a plurality of limit blocks (306) are fixedly connected to the lower end of the clamping plate (305). A locking gear (308) is provided below the clamping plate (305), and a plurality of limit slots (307) are provided above the locking gear (308). The limit blocks (306) can be inserted into the limit slots (307).

5. A closed watershed water quality monitoring device according to claim 4, characterized in that: The linkage assembly comprises a linkage rod (310), a linkage motor (301) fixedly connected to the linkage assembly in a housing (101), an output shaft of the linkage motor (301) fixedly connected to a linkage gear (302), a lower end of the linkage gear (302) fixedly connected to a linkage rod (310), the lower end of the linkage rod (310) being slidably connected to a plurality of linkage rods (310) in sequence, and the lower end of each linkage rod (310) being fixedly connected to a sprocket (303) in a base (602) away from a locking gear ring (309).

6. A closed basin water quality monitoring device according to claim 1, characterized in that: A guide rod (603) is also fixedly connected to the base (602), and the guide rod (603) extends out of the base (602).

7. A closed watershed water quality monitoring device according to claim 1, characterized in that: One end of the housing (101) is fixedly connected to a fixing plate (103).

8. The closed basin water quality monitoring device according to claim 3, characterized in that: A plurality of fastening rods (605) are provided at the lower end of the detection block (604), and the fastening rods (605) can extend into the fastening ring (401).

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