Closed watershed water quality monitoring device and system

Abstract

The invention discloses a closed watershed water quality monitoring device and system.The closed watershed water quality monitoring device comprises a shell and adjusting rods, the lower end of the shell is connected with the multiple adjusting rods, the multiple adjusting rods are connected in a sliding mode, and depth adjusting assemblies capable of adapting to different watershed depths are arranged in the shell and the adjusting rods; one side of each adjusting rod is fixedly connected with one end of a connecting rod, the other end of each connecting rod is fixedly connected with a base, a detection block can be arranged on the base, locking assemblies capable of fixedly connecting the detection blocks are arranged in the base, and a linkage assembly capable of driving the locking assemblies to synchronously operate at the same time is arranged at the lower end of the shell. According to the invention, different detection blocks are replaced, so that data with minimum errors can be provided when different information of water quality is detected; meanwhile, the height of the water quality monitoring device can be adjusted according to drainage basins with different depths; meanwhile, different detection blocks can be synchronously fixed, personnel operation is facilitated, the personnel burden is reduced, and the monitoring efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of water quality monitoring, and in particular to a closed watershed water quality monitoring device and system. Background Art

[0002] Under the background of global ecological and environmental changes, the diversity, stability and sustainability of grassland ecosystems have been seriously affected. Therefore, it is urgent to carry out basic research on water cycle, carbon-nitrogen cycle and ecohydrology to support grassland ecological and environmental protection and restoration. Aiming at the basic frontier where the coupling mechanism of grassland ecohydrological processes is unclear and the eco-hydrological regulation methods need to be innovated, the mechanism of grassland ecohydrological coupling and its response and adaptation to climate change and human activities are the main line to identify the key ecohydrological processes in typical grassland basins and their temporal and spatial cumulative effects, reveal the mutual feedback relationship between water-heat-carbon-nitrogen fluxes in grassland ecosystems and the biological driving and environmental control mechanisms, clarify the coupling mechanism of carbon-nitrogen cycle and hydrological process in grassland landscapes in small watersheds, define the instability threshold of watershed ecohydrological system, and use isotope tracer method to conduct experiments on the transformation relationship of atmospheric precipitation-plant water-soil water-surface water-groundwater at the watershed scale. In this way, more targeted management strategies and regulation approaches that coordinate the sustainable development of animal husbandry with the benign relationship between ecohydrological system are proposed, providing a scientific basis for sustainable use of grassland.

[0003] Therefore, in order to reveal the environmental control mechanism of grassland watershed ecosystems, the cumulative effects of the evolution of watershed eco-hydrological processes, the bidirectional coupling mechanism model of grassland landscape eco-hydrology in small watersheds, and to conduct experiments using the isotope tracer method, there is an urgent need for a device that can monitor data for grassland watersheds in order to reveal the corresponding results; but when different issues need to be solved, different monitoring equipment is often required to monitor different water quality information in the watershed; at the same time, when conducting experiments using the isotope tracer method, the monitoring equipment will be affected by the isotopes, resulting in deviations and errors in the results of subsequent monitoring, which will further lead to errors or mistakes in the revealed mechanisms, effects, and models, and ultimately lead to poor governance effects on grassland watershed ecology.

[0004] There are already some water quality monitoring devices for monitoring water quality, such as a published patent, which provides a modular hydrological water quality monitoring device with publication number CN109324163B. When in use, the water quality monitoring device manually installs different sheet-like rods to achieve the device's fit to the river profile; at the same time, the device manually installs hydrological monitors equipped with different monitoring equipment on different sheet-like rods, thereby achieving detection of different data of the river. Manual installation takes a long time and is inconvenient. 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; The lower end of the shell is provided with several slidingly connected linkage rods in the linkage assembly, and the linkage rods are connected to several locking gears in the base through chain transmission. The locking gears are meshed with the outer side of the locking gear ring, and the inner side of the locking gear ring is meshed with several compression gears of the locking assembly. The compression gear can drive the fastening ring arranged therein to fix the detection block.

[0007] 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.

[0008] 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.

[0009] Preferably, two sprockets are rotatably connected in the base, and the two sprockets are connected through a chain transmission. A clamping disk is fixedly connected below the sprocket close to the locking gear ring, and a plurality of limit blocks are fixedly connected to the lower end of the clamping disk. A locking gear is provided below the clamping disk, and a plurality of limit grooves are provided above the locking gear, and the limit blocks can be inserted into the limit grooves.

[0010] Preferably, 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.

[0011] Preferably, a spring is fixedly connected between the mating rack 1 and the base, and another spring is fixedly connected between the mating rack 2 and the base.

[0012] Preferably, the linkage assembly includes a linkage rod, a linkage motor fixedly connected to the linkage assembly in a shell, the output shaft of the linkage motor fixedly connected to a linkage gear, the lower end of the linkage gear fixedly connected to a linkage rod, the lower end of the linkage rod is slidably connected to several linkage rods in turn, and the lower end of each linkage rod is fixedly connected to a sprocket in a base away from the locking gear ring.

[0013] Preferably, a guide rod is fixedly connected inside the base, and the guide rod extends out of the base.

[0014] Preferably, one end of the shell is fixedly connected to a fixing plate.

[0015] Preferably, a plurality of fastening rods are provided at the lower end of the detection block, and the fastening rods can extend into the fastening ring.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: by setting a plurality of bases and detection blocks, different detection blocks can be replaced for different subjects, thereby ensuring that when different water quality information is detected, data with the smallest error can be provided, ensuring that the revealed mechanism, effect and model can reflect the accurate situation of grassland watershed ecology, and facilitating the implementation of governance effects; at the same time, after conducting experiments using the isotope tracer method, different detection blocks can be replaced to avoid residual isotopes affecting the development of subsequent subjects; 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 of different depths, so that the same water quality monitoring device can be applied to different watersheds, saving money 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 personnel burden and improving monitoring efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a cross-sectional view of the middle part of the present invention; Figure 3A cross-sectional view of the base of the present invention; Figure 4 For the present invention Figure 2 A partial enlarged view of point A in the middle; Figure 5 It is a cross-sectional view of the present invention at the position of the limit rod; Figure 6 It is a structural schematic diagram of the locking gear of the present invention; Figure 7 It is a cross-sectional view of the present invention at the position of the fastening ring; Figure 8 It is a cross-sectional view of the present invention at the position of shifting the rack; Fig. 9 For the present invention Figure 2 A partial enlarged view of point B in the middle; Fig.10 For the present invention Figure 2 A partial enlarged view of point C in the middle; Fig.11 It is a structural schematic diagram of the detection block of the present invention; Fig.12 This is a schematic diagram of the structure in which the detection block of the present invention is installed on the base.

[0018] 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

[0019] 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.

[0020] See also Figure 1-12In order to solve the problem that different monitoring equipment is needed 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 equipment, which results in a long installation time and inconvenient installation. In order to achieve the problem that different detection blocks 604 can be replaced for different problems; at the same time, the height of the water quality monitoring device can be easily adjusted, and different detection blocks 604 can be fixed, which is convenient for personnel to operate and improve the monitoring efficiency. The present invention provides a technical solution: a closed basin water quality monitoring device and system, including a shell 101 and an adjusting rod 102, the lower end of the shell 101 is connected to a plurality of adjusting rods 102, and the plurality of adjusting rods 102 are slidably connected, and the shell 101 and the adjusting rod 10 2 is provided with a depth adjustment component that can adapt to different basin depths, one side of each adjustment rod 102 is fixedly connected to one end of a connecting rod 601, and the other end of the connecting rod 601 is fixedly connected to the base 602, and a detection block 604 can be set on the base 602, and a locking component that can fix the detection block 604 is set in the base 602, and a linkage component that can drive several locking components to operate synchronously at the same time is set at the lower end of the shell 101, which can perform fast synchronous locking and fast synchronous cancellation; one end of the shell 101 is fixedly connected to the fixing plate 103; a guide rod 603 is also fixedly connected to the base 602, and the guide rod 603 extends out of the base 602; the lower end of the detection block 604 is provided with several fastening rods 605, 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.

[0021] When in use, confirm in advance the depth of the location where the water quality monitoring device needs to be installed in the basin, and then adjust the height of the water quality monitoring device through the depth adjustment component. Figure 1-2The water quality monitoring device shown is in the longest state. When the length of the water quality monitoring device needs to be shortened, some bases 602 at the lower end of the water quality monitoring device will be connected to each other, but the base 602 at the upper end of the water quality monitoring device will remain in its original state. Then, a detection block 604 is installed on each base 602 that remains in its original state, and then the linkage component is started. The linkage component controls the locking component in the base 602 that remains in its original state to fix the detection block 604 to the base 602, but the linkage component will not control the locking component in the bases 602 that are interconnected at the lower end of the water quality monitoring device, so as to avoid that when there is no device to be fixed in the fastening ring 401, direct tightening of the fastening ring 401 may cause the fastening ring 401 to deform too much, and at the same time can effectively avoid the locking component The parts inside are not worn out, and the service life of the parts is extended. Then the water quality monitoring device is placed at the position that needs to be monitored, and finally the fixing plate 103 is installed on the shore or other monitoring bases, such as ships, bridges, etc., by means including but not limited to bolt fixing. When the detection block 604 needs to be replaced, the water quality monitoring device is taken out and the detection block 604 is replaced. When the length of the water quality monitoring device is shortened to the shortest, the volume of the water quality monitoring device is small, which is convenient for personnel transportation and reduces transportation pressure. The monitoring equipment in the detection block 604 includes but is not limited to pH monitors, ammonia nitrogen detectors, temperature monitors and BOD detectors, etc., which can monitor water quality information in the basin, or monitoring equipment that can assist in solving the problem.

[0022] In order to achieve the effect that the water quality monitoring device can adapt to the depth of the location that needs to be monitored in the watershed, a depth adjustment component is provided, which includes a movable pulley 204, an adjusting rod 102 is fixedly connected to the lower end of the shell 101, and the lower end of the adjusting rod 102 is slidably connected to several adjusting rods 102 in sequence, the inner rotation of the lowermost adjusting rod 102 is connected to the movable pulley 204, and the fixed pulley 203 is rotated inside the shell 101, and the shell 101 is also fixedly connected to the rope winding motor 201, and the output shaft of the rope winding motor 201 is fixedly connected to the rope winding shaft 202, and one end of the rope 205 is fixedly connected to the rope winding shaft 202, and the other end of the rope 205 first passes through the fixed pulley 203, and then passes through the movable pulley 204, and is finally fixed to the shell 101.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] Sealing rings are provided at different connections of the water quality monitoring device, including but not limited to the connection between the locking gear ring 309 and the base 602, the connection between the adjacent adjusting rod 102, the connection between the linkage rod 310 and the housing 101, the connection between the adjacent linkage rods 310, the connection between the matching rack 1 501 and the base 602, and the connection between the matching rack 2 502 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.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A closed basin water quality monitoring device and system, 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) mesh with the outer side of the locking gear ring (309). The inner side of the locking gear ring (309) meshes with a plurality of compression gears (403) of the locking assembly. The compression gear (403) can drive a fastening ring (401) provided therein to fix the detection block (604).

2. A closed watershed water quality monitoring device and system 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 watershed water quality monitoring device and system 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 watershed water quality monitoring device and system 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 and system according to claim 4, characterized in that: 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).

6. A closed watershed water quality monitoring device and system according to claim 5, characterized in that: 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).

7. A closed watershed water quality monitoring device and system 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).

8. A closed watershed water quality monitoring device and system 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).

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

10. A closed watershed water quality monitoring device and system 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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