Water quality sampling equipment for hydraulic engineering monitoring

Abstract

The invention relates to the field of water quality detection and sampling, in particular to water quality sampling equipment for hydraulic engineering monitoring, which comprises a moving unit, an anti-blocking unit arranged on the moving unit, a sampling unit arranged on the anti-blocking unit and a sampling control unit arranged on the sampling unit, the sampling unit comprises a water storage barrel arranged on the anti-blocking unit, a water inlet assembly arranged on the water storage barrel, a piston I arranged on the water storage barrel and a clamping block arranged on the water storage barrel; the sampling control unit comprises a linear motor arranged on the moving unit, a second piston arranged on the linear motor, a sealing plate arranged on the moving unit and matched with the clamping block, and a rotating assembly arranged on the sealing plate and matched with the second piston. The equipment can continuously sample at different depths and positions, so that the sampling efficiency is remarkably improved, and meanwhile, samples at different sampling points are effectively prevented from being mixed.

Description

Technical Field

[0001] The present invention relates to the field of water quality detection sampling, and particularly to a water quality sampling device for monitoring water conservancy projects. Background Art

[0002] In water conservancy projects, water quality monitoring is an important link to ensure water resource security and protect the water ecological environment. However, existing water quality sampling devices usually can only achieve single sampling tasks or small-scale sampling, and cannot perform continuous sampling at different positions and depths in the water area, resulting in low sampling efficiency. Moreover, continuous round-trip operations are likely to cause the collected samples to be mixed, making it difficult to accurately reflect the water quality status. Summary of the Invention

[0003] In view of the problem that the sampling device in the above or existing technologies cannot perform continuous sampling at different positions and depths in the water area, resulting in low sampling efficiency, and continuous round-trip operations are likely to cause the collected samples to be mixed, making it difficult to accurately reflect the water quality status, the present invention is proposed.

[0004] Therefore, the purpose of the present invention is to provide a water quality sampling device for monitoring water conservancy projects.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: including a moving unit, a clogging prevention unit arranged on the moving unit, a sampling unit arranged on the clogging prevention unit, and a sampling control unit arranged on the sampling unit; the sampling unit includes a water storage cylinder arranged on the clogging prevention unit, a water inlet assembly arranged on the water storage cylinder, a piston I arranged on the water storage cylinder, and a clamping block arranged on the water storage cylinder; the sampling control unit includes a linear motor arranged on the moving unit, a piston II arranged on the linear motor, a sealing plate arranged on the moving unit and cooperating with the clamping block, and a rotating assembly arranged on the sealing plate and cooperating with the piston II.

[0006] As a preferred scheme of the water quality sampling device for monitoring water conservancy projects of the present invention, wherein: the clogging prevention unit includes a connecting cylinder arranged on the moving unit, an intercepting net arranged on the connecting cylinder, and a hydrodynamic paddle arranged on the intercepting net.

[0007] As a preferred scheme of the water quality sampling device for monitoring water conservancy projects of the present invention, wherein: multiple groups of the sampling units are arranged on the connecting cylinder around the central axis of the connecting cylinder; the connecting cylinder is provided with an installation groove for cooperating with the water storage cylinder, a connecting groove and a fixing groove for cooperating with the clamping block.

[0008] As a preferred scheme of the water quality sampling device for monitoring water conservancy projects of the present invention, wherein: the water inlet assembly includes a connecting head arranged on the water storage cylinder, a water inlet pipe arranged on the connecting head, a protrusion arranged on the connecting head, and a plugging block arranged on the connecting head; the water storage cylinder is communicated with the intercepting net through the water inlet pipe.

[0009] As a preferred embodiment of the water quality sampling device for water conservancy project monitoring of the present invention, the following is provided: The second piston is slidably arranged on the connecting cylinder, and a pressure chamber is arranged on the connecting cylinder to cooperate with the second piston.

[0010] As a preferred embodiment of the water quality sampling device for water conservancy project monitoring of the present invention, the following is provided: The sealing plate is rotatably arranged in the pressure chamber, and a notch is arranged on the sealing plate.

[0011] As a preferred embodiment of the water quality sampling device for water conservancy project monitoring of the present invention, the following is provided: The rotating assembly includes a connecting rod arranged on the sealing plate and coinciding with the central axis of the sealing plate, a fixed shaft fixedly connected to the connecting rod, and a movable sleeve arranged on the fixed shaft.

[0012] As a preferred embodiment of the water quality sampling device for water conservancy project monitoring of the present invention, the following is provided: The movable sleeve is provided with an external thread, the second piston is provided with a connecting sleeve, and the connecting sleeve is provided with an internal thread that cooperates with the external thread.

[0013] As a preferred embodiment of the water quality sampling device for water conservancy project monitoring of the present invention, the following is provided: A contact block is rotatably arranged on the inner wall of the movable sleeve, and a receiving groove for cooperating with the contact block is arranged on the inner wall of the movable sleeve; An extrusion groove for cooperating with the contact block is arranged on the fixed shaft.

[0014] As a preferred embodiment of the water quality sampling device for water conservancy project monitoring of the present invention, the following is provided: When the linear motor pushes the second piston towards the sealing plate, the device enters the switching state. In this state, the notch leaves the previous set of water storage cylinders and aligns with the first piston on the next set of water storage cylinders; When the linear motor pulls the second piston away from the sealing plate, the device enters the sampling state. In this state, a negative pressure area is generated inside the water storage cylinder, so as to perform water quality sampling operations through the water inlet pipe.

[0015] The beneficial effects of the water quality sampling device for water conservancy project monitoring of the present invention: Through the setting of multiple sampling units, the present invention cooperates with the movement of the second piston to rotate and adjust the sealing plate, enabling the device to achieve independent control of multiple sampling units through the sampling control unit. Combining with the movement of the device, continuous sampling can be realized at different depths and positions in the target water area, avoiding multiple round trips of the device, significantly improving the sampling efficiency, and effectively preventing the mixing of samples at different sampling points, ensuring the accuracy of sampling data. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 Overall structural schematic diagram of the water quality sampling equipment for water conservancy project monitoring.

[0018] Figure 2 Test structural schematic diagram of the water quality sampling equipment for water conservancy project monitoring.

[0019] Figure 3 Cross-sectional structural schematic diagram of the anti-blocking unit of the water quality sampling equipment for water conservancy project monitoring.

[0020] Figure 4 Structural schematic diagram of the water storage cylinder of the water quality sampling equipment for water conservancy project monitoring.

[0021] Figure 5 Cross-sectional structural schematic diagram of the connecting cylinder of the water quality sampling equipment for water conservancy project monitoring.

[0022] Figure 6 Cross-sectional structural schematic diagram of the water storage cylinder of the water quality sampling equipment for water conservancy project monitoring.

[0023] Figure 7 Structural schematic diagram of the sampling control unit of the water quality sampling equipment for water conservancy project monitoring.

[0024] Figure 8 Structural schematic diagram of the second piston of the water quality sampling equipment for water conservancy project monitoring.

[0025] Figure 9 Structural schematic diagram of the sealing plate of the water quality sampling equipment for water conservancy project monitoring.

[0026] Figure 10 Structural schematic diagram of the rotating assembly of the water quality sampling equipment for water conservancy project monitoring.

[0027] Figure 11 Cross-sectional structural schematic diagram of the fixed shaft of the water quality sampling equipment for water conservancy project monitoring.

[0028] In the figure: 1. Moving unit; 11. Main body; 12. Power paddle; 13. Support frame; 2. Anti-blocking unit; 21. Connecting cylinder; 211. Installation groove; 212. Connecting groove; 213. Fixing groove; 214. Pressure chamber; 22. Intercepting net; 23. Hydrodynamic paddle; 3. Sampling unit; 31. Water storage cylinder; 32. Water inlet assembly; 321. Connector; 322. Water inlet pipe; 323. Protrusion; 324. Plugging block; 33. Piston I; 34. Clamping block; 4. Sampling control unit; 41. Linear motor; 42. Piston II; 421. Connecting sleeve; 422. Internal thread; 43. Sealing plate; 431. Notch; 44. Rotating assembly; 441. Connecting rod; 442. Fixed shaft; 4421. Extrusion groove; 443. Movable sleeve; 4431. External thread; 4432. Abutting block; 4433. Storage groove. Detailed implementation manners

[0029] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be given with reference to the accompanying drawings of the specification.

[0030] Example 1, referring to Figures 1-7 , which is the first embodiment of the present invention. This embodiment provides a water quality sampling device for water conservancy project monitoring, which includes a moving unit 1 for driving the device to move in the water area to facilitate sampling operations, an anti-blocking unit 2 arranged on the moving unit 1, a sampling unit 3 arranged on the anti-blocking unit 2, and a sampling control unit 4 arranged on the sampling unit 3. The anti-blocking unit 2 is used to install the sampling unit 3, and the movement of the sampling control unit 4 drives the sampling unit 3 to collect water quality. The sampling unit 3 includes a water storage cylinder 31 arranged on the anti-blocking unit 2 for storing the sampled water quality, a water inlet assembly 32 arranged on the water storage cylinder 31 for water to enter the water storage cylinder 31, a piston I 33 arranged on the water storage cylinder 31 for cooperating with the movement of the sampling control unit 4 to generate a negative pressure area inside the water storage cylinder 31, sucking the water quality through the water inlet assembly 32. A sealing ring is arranged on the piston I 33 to cooperate with the water storage cylinder 31, and a clamping block 34 is arranged on the water storage cylinder 31 for installing the sampling unit 3 on the anti-blocking unit 2 for convenient disassembly. The sampling control unit 4 includes a linear motor 41 disposed on the mobile unit 1 for generating power, a second piston 42 disposed on the linear motor 41 for moving back and forth in cooperation with the linear motor 41, a sealing plate 43 disposed on the mobile unit 1 and cooperating with the clamping block 34 for communicating the space between the first piston 33 and the second piston 42. By the movement of the second piston 42, the pressure in the space between the second piston 42 and the first piston 33 changes, thereby driving the first piston 33 to move in the water storage cylinder 31, driving a negative pressure area to be generated in the water storage cylinder 31 to suck water into the water storage cylinder 31 for sampling operations, and a rotating assembly 44 disposed on the sealing plate 43 and cooperating with the second piston 42 for rotationally adjusting the sealing plate 43 in cooperation with the movement of the second piston 42, facilitating the second piston 42 to drive other sampling units 3 to perform sampling, and realizing continuous sampling operations at different positions.

[0031] Among them, the mobile unit 1 includes a main body 11 disposed on the connecting cylinder 21, which is the main body for the operation of the device. Inside the mobile unit 1, there are a storage battery, a vision system and a control system for controlling the movement of the entire device. A handle is disposed on the mobile unit 1 for easy grasping by personnel, a power paddle 12 disposed on the main body 11 for generating power to drive the entire device to move to different positions in the water area for water quality sampling, and a support frame 13 disposed on the main body 11 for stably supporting the entire device and playing a role in protecting the device.

[0032] In summary, the staff first place the device in the water area to be sampled. At this time, the power paddle 12 is started to drive the device to move to the designated sampling area. Then, the linear motor 41 is started to drive the second piston 42 to move towards the first piston 33. When the second piston 42 passes through the rotating assembly 44, the second piston 42 drives the sealing plate 43 to rotate. When the second piston 42 completely passes over the rotating assembly 44, at this time, the first piston 33 on one group of water storage cylinders 31 is communicated with the second piston 42 through the sealing plate 43. Then, the second piston 42 moves towards the first piston 33, and the space between the second piston 42 and the first piston 33 decreases, forming a high-pressure area, driving the first piston 33 to move towards the water inlet assembly 32 to discharge the air in the water storage cylinder 31. At this time, the linear motor 41 drives the second piston 42 to move back. At this time, the space between the second piston 42 and the first piston 33 increases, forming a negative pressure area, driving the first piston 33 to move back. At this time, the space between the water inlet assembly 32 and the first piston 33 increases, generating a negative pressure area, driving water to enter the water storage cylinder 31 for collection operations. At this time, the second piston 42 moving back does not affect the state of the sealing plate 43 through the rotating assembly 44; When the second piston 42 crosses the rotating assembly 44 again, the linear motor 41 drives the second piston 42 to move towards the first piston 33. At this time, as the second piston 42 moves, the sealing plate 43 is driven to rotate through the rotating assembly 44. When the second piston 42 crosses the rotating assembly 44 again, the sealing plate 43 exactly seals the first piston 33 on the water storage cylinder 31 that has completed sampling, and connects the first piston 33 on the next group of water storage cylinders 31 with the second piston 42. Then, by repeating the above operations, continuous sampling can be achieved at different positions in the water area, effectively improving the efficiency of water quality collection. Moreover, through water quality samples at different positions, the result of water quality assessment can be made more accurate.

[0033] Embodiment 2. Refer to Figures 1-7 , which is the second embodiment of the present invention. Different from the previous embodiment: water quality is collected. Further compared with Embodiment 1, the anti-blocking unit 2 includes a connecting cylinder 21 provided on the moving unit 1 for installing the water storage cylinder 31, an intercepting net 22 provided on the connecting cylinder 21 for blocking waterweeds, floating objects, etc. in the water, and a hydrodynamic paddle 23 provided on the intercepting net 22 for rotating in cooperation with the power generated when the device moves or the impact force of the water flow to scrape the intercepting net 22 to prevent the mesh holes of the intercepting net 22 from being blocked and affecting the sampling operation of the water storage cylinder 31.

[0034] Among them, multiple groups of sampling units 3 are arranged around the central axis of the connecting cylinder 21 on the connecting cylinder 21. Each group of sampling units 3 is provided with different numbers for distinguishing the water sampled at different positions. And through the surrounding arrangement of the sampling units 3, it is convenient to adjust the connection and sealing between the first piston 33 and the second piston 42 when the sealing plate 43 rotates; The connecting cylinder 21 is provided with an installation groove 211 for cooperating with the water storage cylinder 31 to install the water storage cylinder 31, a connecting groove 212 and a fixing groove 213 for cooperating with the clamping block 34. The connecting groove 212 communicates with the fixing groove 213. The connecting groove 212 is used to align the water storage cylinder 31 with the installation groove 211. By docking the clamping block 34 with the connecting groove 212, the water storage cylinder 31 is pushed into the installation groove 211. The fixing groove 213 is used for when the clamping block 34 slides to the bottom in the connecting groove 212, at this time, rotating the water storage cylinder 31 so that the clamping block 34 enters the fixing groove 213 to complete the fixation of the water storage cylinder 31.

[0035] Among them, the water inlet assembly 32 includes a connector 321 disposed on the water storage cylinder 31, which is used to connect one end of the water storage cylinder 31 to allow water to enter the water storage cylinder 31. The water storage cylinder 31 and the connector 321 can be connected by threads, and the sealing performance is enhanced by setting a sealing surface. An inlet pipe 322 disposed on the connector 321 is used to discharge the air in the water storage cylinder 31 and allow water to enter the water storage cylinder 31. A protrusion 323 disposed on the connector 321 facilitates the rotation of the connector 321 by personnel. And a plugging block 324 disposed on the connector 321 is used to block the contact between the inside of the water storage cylinder 31 and the outside world, preventing the water on the water surface from entering the water storage cylinder 31 through the inlet pipe 322 when the device is put into the water; The water storage cylinder 31 is communicated with the intercepting net 22 through the inlet pipe 322. The intercepting net 22 is used to block large particulate impurities in the water, prevent them from entering the inlet pipe 322, and allow water to smoothly pass through the inlet pipe 322 into the water storage cylinder 31 for water quality sampling.

[0036] The remaining structures are the same as those in Embodiment 1.

[0037] In summary, when the linear motor 41 drives the piston two 42 to move in the direction of the piston one 33, the space between the piston two 42 and the piston one 33 decreases, forming a high-pressure area, which drives the piston one 33 to move in the direction of the connector 321. At this time, the space between the connector 321 and the piston one 33 decreases, and the air pressure increases. At this time, the high pressure pushes the plugging block 324 out of the inlet pipe 322, driving the air inside the water storage cylinder 31 to be discharged; When the linear motor 41 drives the piston two 42 to move back, at this time, the space between the piston two 42 and the piston one 33 increases, forming a negative-pressure area, which drives the piston one 33 to move back. At this time, the space between the connector 321 and the piston one 33 increases, generating a negative-pressure area, which drives water to enter the water storage cylinder 31 through the inlet pipe 322, so that the pressures on both sides of the piston one 33 reach balance, and the sampling operation at this position is completed.

[0038] Embodiment 3, referring to Figures 1-11 , is the second embodiment of the present invention. Different from the previous embodiment, continuous sampling operations are performed. Compared with Embodiment 2, further, the piston two 42 is slidably disposed on the connecting cylinder 21. A pressure chamber 214 is provided on the connecting cylinder 21 to cooperate with the piston two 42. A sealing ring is provided on the piston two 42 to cooperate with the pressure chamber 214. The piston two 42 controls the air pressure between the piston two 42 and the piston one 33 by moving back and forth in the pressure chamber 214, driving the piston one 33 to move back and forth on the water storage cylinder 31, and realizing the water quality sampling of the water storage cylinder 31.

[0039] Among them, the sealing plate 43 is rotatably arranged in the pressure chamber 214. A notch 431 is arranged on the sealing plate 43, and the size of the notch 431 just meets the requirement for a set of first pistons 33 to be exposed. When a set of first pistons 33 communicate with the second piston 42 through the notch 431, the remaining first pistons 33 are blocked by the sealing plate 43, so that when the second piston 42 moves, it only drives a set of sampling units 3 to perform sampling operations alone, realizing the individual sampling of each set of sampling units 3 and ensuring that the water quality of each set of samples is not polluted.

[0040] Among them, the rotating assembly 44 includes a connecting rod 441 arranged on the sealing plate 43 and coinciding with the central axis of the sealing plate 43, a fixed shaft 442 used to drive the sealing plate 43 to rotate and fixedly connected to the connecting rod 441, which is used to drive the sealing plate 43 to rotate through the connecting rod 441, and a movable sleeve 443 arranged on the fixed shaft 442, which is used to rotate in cooperation with the reciprocating movement of the second piston 42, and controls the rotation of the fixed shaft 442 through the rotation of the movable sleeve 443, thereby controlling the rotation of the sealing plate 43.

[0041] Among them, an external thread 4431 is arranged on the movable sleeve 443, a connecting sleeve 421 is arranged on the second piston 42, and an internal thread 422 matching the external thread 4431 is arranged on the connecting sleeve 421. When the second piston 42 moves back and forth, the movable sleeve 443 is driven to rotate through the cooperation of the external thread 4431 and the internal thread 422.

[0042] Among them, a contact block 4432 is rotatably arranged on the inner wall of the movable sleeve 443, which is used to rotate and adjust the fixed shaft 442 in cooperation with the rotation of the movable sleeve 443. A storage groove 4433 matching the contact block 4432 is arranged on the inner wall of the movable sleeve 443 for storing the contact block 4432; An extrusion groove 4421 matching the contact block 4432 is arranged on the fixed shaft 442, which is used to control the rotation of the fixed shaft 442 in cooperation with the contact block 4432 when the movable sleeve 443 rotates.

[0043] Among them, when the linear motor 41 pushes the second piston 42 towards the sealing plate 43, the device enters the switching state. In this state, the notch 431 leaves the previous set of water storage cylinders 31 and aligns with the first piston 33 on the next set of water storage cylinders 31. At this time, the connecting sleeve 421 drives the movable sleeve 443 to rotate counterclockwise through the push of the internal thread 422 against the external thread 4431. At this time, the extrusion groove 4421 and the storage groove 4433 are connected through the abutment of the abutting block 4432. At this time, the movable sleeve 443 drives the fixed shaft 442 to rotate counterclockwise synchronously through the abutting block 4432. When the internal thread 422 leaves the external thread 4431, the notch 431 just rotates to near the corresponding first piston 33, so that the exposed first piston 33 is communicated with the second piston 42. By moving the second piston 42, the volume of the pressure chamber 214 decreases and the air pressure increases. The high pressure drives the first piston 33 to move towards the connecting head 321, exhausting the air in the water storage cylinder 31 and preparing for water quality sampling; When the linear motor 41 pulls the second piston 42 away from the sealing plate 43, the device enters the sampling state. In this state, a negative pressure area is generated inside the water storage cylinder 31, so as to perform water quality sampling operations through the water inlet pipe 322. At this time, the second piston 42 moves back. At this time, the internal thread 422 reconnects with the external thread 4431 and drives the movable sleeve 443 to rotate clockwise. At this time, the abutting block 4432 cooperates with the rotation of the movable sleeve 443 and is retracted into the storage groove 4433 under the extrusion of the extrusion groove 4421. At this time, the fixed shaft 442 does not rotate. At this time, the sealing plate 43 does not rotate under the action of the fixed shaft 442. At this time, the space inside the pressure chamber 214 increases, generating a negative pressure area. The negative pressure drives the first piston 33 to move back. At this time, the space between the first piston 33 and the connecting head 321 increases, usually forming a negative pressure area. At this time, the water in the sampling area is attracted and enters the water storage cylinder 31 through the water inlet pipe 322, keeping the pressure balance on both sides of the first piston 33. At this time, the sampling work in this sampling area is completed.

[0044] All other structures are the same as those in Embodiment 2.

[0045] In summary, when the device moves to the collection area, the linear motor 41 is activated at this time to drive the piston two 42 to move in the direction of the piston one 33. At this time, the connecting sleeve 421 drives the movable sleeve 443 to rotate counterclockwise through the push of the internal thread 422 against the external thread 4431. At this time, the extrusion groove 4421 and the storage groove 4433 are connected through the abutment of the abutment block 4432. At this time, the movable sleeve 443 drives the fixed shaft 442 to rotate counterclockwise synchronously through the abutment block 4432. At this time, the fixed shaft 442 drives the sealing plate 43 to rotate counterclockwise through the connecting rod 441. When the internal thread 422 leaves the external thread 4431, the notch 431 just rotates to near the corresponding piston one 33 at this time, so that the exposed piston one 33 is communicated with the piston two 42. At this time, the piston two 42 continues to move on the connecting rod 441, so that the volume of the pressure chamber 214 decreases and the air pressure increases. The high pressure drives the piston one 33 to move in the direction of the connector 321, exhausting the air in the water storage cylinder 31 and preparing for water quality sampling; At this time, the linear motor 41 drives the piston two 42 to move back, the space in the pressure chamber 214 increases, generating a negative pressure area. The negative pressure drives the piston one 33 to move back. At this time, the space between the piston one 33 and the connector 321 increases, usually forming a negative pressure area. At this time, the water in the sampling area is attracted and enters the water storage cylinder 31 through the water inlet pipe 322, keeping the pressure on both sides of the piston one 33 balanced. At this time, the sampling work in this sampling area is completed.

[0046] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A water quality sampling device for water conservancy project monitoring, characterized in that: It comprises a mobile unit (1), an anti-blocking unit (2) arranged on the mobile unit (1), a sampling unit (3) arranged on the anti-blocking unit (2), and a sampling control unit (4) arranged on the sampling unit (3); The sampling unit (3) comprises a water storage cylinder (31) arranged on the anti-blocking unit (2), a water inlet assembly (32) arranged on the water storage cylinder (31), a piston (33) arranged on the water storage cylinder (31), and a clamping block (34) arranged on the water storage cylinder (31); The sampling control unit (4) comprises a linear motor (41) arranged on the mobile unit (1), a second piston (42) arranged on the linear motor (41), a sealing plate (43) arranged on the mobile unit (1) and cooperating with the clamping block (34), and a rotating assembly (44) arranged on the sealing plate (43) and cooperating with the second piston (42).

2. The water quality sampling equipment for water conservancy project monitoring according to claim 1, characterized in that: The anti-blocking unit (2) comprises a connecting cylinder (21) arranged on the mobile unit (1), an interception net (22) arranged on the connecting cylinder (21), and a hydrodynamic blade (23) arranged on the interception net (22).

3. The water quality sampling equipment for water conservancy project monitoring as claimed in claim 2, characterized in that: The sampling units (3) are arranged in multiple groups on the connecting tube (21) around the central axis of the connecting tube (21); The connecting cylinder (21) is provided with a mounting groove (211) matching the water storage cylinder (31), a connecting groove (212) matching the clamping block (34), and a fixing groove (213).

4. The water quality sampling equipment for water conservancy project monitoring as claimed in claim 3, characterized in that: The water inlet assembly (32) comprises a connecting head (321) arranged on the water storage cylinder (31), a water inlet pipe (322) arranged on the connecting head (321), a protrusion (323) arranged on the connecting head (321), and a blocking block (324) arranged on the connecting head (321); The water storage cylinder (31) is connected to the interception net (22) via a water inlet pipe (322).

5. The water quality sampling equipment for water conservancy project monitoring as claimed in claim 4, characterized in that: The second piston (42) is slidably disposed on the connecting cylinder (21), and the connecting cylinder (21) is provided with a pressure chamber (214) that cooperates with the second piston (42).

6. The water quality sampling equipment for water conservancy project monitoring as claimed in claim 5, characterized in that: The sealing plate (43) is rotatably disposed in the pressure chamber (214), and a notch (431) is disposed on the sealing plate (43).

7. The water quality sampling equipment for water conservancy project monitoring according to claim 6, characterized in that: The rotating assembly (44) comprises a connecting rod (441) arranged on the sealing plate (43) and coincident with the central axis of the sealing plate (43), a fixed shaft (442) fixedly connected to the connecting rod (441), and a movable sleeve (443) arranged on the fixed shaft (442).

8. The water quality sampling equipment for water conservancy project monitoring according to claim 7, characterized in that: The movable sleeve (443) is provided with an external thread (4431), the second piston (42) is provided with a connecting sleeve (421), and the connecting sleeve (421) is provided with an internal thread (422) matching the external thread (4431).

9. The water quality sampling equipment for water conservancy project monitoring as claimed in claim 8, characterized in that: An abutment block (4432) is rotatably provided on the inner wall of the movable sleeve (443), and a receiving groove (4433) matching the abutment block (4432) is provided on the inner wall of the movable sleeve (443); The fixed shaft (442) is provided with an extrusion groove (4421) that matches the abutment block (4432).

10. The water quality sampling equipment for water conservancy project monitoring according to claim 9, characterized in that: When the linear motor (41) pushes the second piston (42) to move toward the sealing plate (43), the device enters a switching state, in which the notch (431) leaves the upper group of water storage cylinders (31) and aligns with the first piston (33) on the lower group of water storage cylinders (31); When the linear motor (41) pulls the second piston (42) away from the sealing plate (43), the device enters a sampling state, in which a negative pressure zone is generated inside the water storage cylinder (31), thereby performing a water quality sampling operation through the water inlet pipe (322).

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