Anti-blocking river and lake dredging device for water conservancy surveying

Abstract

The application discloses a kind of river and lake dredging devices of anti-clogging for water conservancy survey, belong to water conservancy survey field, including pump machine, the lower end of pump machine is fixedly installed hard pipe, the bottom of hard pipe is fixedly connected with multiple groups of connecting blocks, gear ring is engaged with the output end of driving element, sleeve ring is provided with extrusion assembly, extrusion assembly is used to extrude silt, pipeline is provided with anti-blocking component.The pump machine, hard pipe, pipeline and sleeve ring are set in the application, can effectively suck and discharge the silt at the bottom of river and lake to the shore, reduce the amount of silt in river and lake to improve water quality, and through extrusion assembly, anti-blocking component and slide bar, when there is a stone that can block the pipe opening, since slide bar is always moving up and down, it will push the stone at the pipe opening, ensure the normal action of pipe sucking silt, effectively realize the anti-clogging function of equipment, can reduce the situation that silt cannot be normally sucked into the pipe when the stone is blocked in the pipe opening.

Description

Technical Field

[0001] This invention relates to the field of water conservancy surveying, and more specifically, to a blockage-resistant river and lake dredging device for water conservancy surveying. Background Technology

[0002] Water conservancy surveying is a very important and fundamental part of water conservancy project construction. It involves investigating, measuring, analyzing and evaluating various natural geographical elements of the project site and its surrounding environment, providing a scientific basis for the planning, design, construction and operation management of the project.

[0003] Prolonged siltation reduces the effective volume of rivers and lakes, lowering their water storage capacity and affecting their functions such as flood control, water supply, and irrigation. Furthermore, the silted sediment contains large amounts of organic matter and pollutants, which decompose under anaerobic conditions to produce harmful substances such as ammonia nitrogen and sulfides, polluting the water and affecting the survival of aquatic organisms. When river and lake water quality fails to meet standards, dredging is necessary based on water conservancy surveys to improve water quality. Existing dredging equipment typically uses pumps to extract silt; however, silt often contains stones. If these stones block the pipes connected to the pumps, dredging work must be stopped to clear the blockage, which is troublesome and time-consuming. Therefore, this paper proposes an anti-clogging river and lake dredging device for water conservancy surveys. Summary of the Invention

[0004] In view of the problems existing in the prior art, the purpose of this invention is to provide a blockage-resistant river and lake dredging device for water conservancy surveying.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] A clog-resistant river and lake dredging device for water conservancy surveying includes a pump, a rigid pipe fixedly installed at the lower end of the pump, a flexible hose fixedly inserted at the upper end of the pump, multiple sets of connecting blocks fixedly connected to the bottom of the rigid pipe, a collar rotatably fitted on the outer surface of each set of connecting blocks, and the same pipe fixedly connected to the bottom of each set of connecting blocks. A toothed ring is fixedly installed at the bottom of the collar, and a squeezing component is provided inside the collar for squeezing silt. An anti-clogging component is provided inside the pipe for moving up and down within the pipe. The anti-clogging component includes a sleeve plate fixedly connected to the inner wall of the rigid pipe, a sliding rod slidably fitted at the center of the sleeve plate, multiple sets of inclined plates fixedly fitted on the sliding rod, and the squeezing component causing the sliding rod to slide upward through the inclined plates. A first thrust spring is fitted on the outer surface of the sliding rod.

[0007] Furthermore, the top end of the first thrust spring is fixedly connected to the bottom end of the sleeve plate, and the bottom end of the first thrust spring is simultaneously fixedly connected to the top ends of multiple sets of inclined plates. The horizontal position height of each set of inclined plates is the same as the horizontal position height of the anti-blocking component.

[0008] Furthermore, the multiple sets of connecting blocks are arranged circumferentially at equal intervals. The extrusion assembly includes multiple sets of extrusion blocks slidably disposed on the top of the pipe. The extrusion blocks and connecting blocks are arranged in a bucket shape. Each set of extrusion blocks and connecting blocks is located inside a collar. The inner wall of the collar is provided with a reciprocating threaded groove. A slip ring is also provided between the collar and the extrusion blocks. Balls are slidably disposed on the outer surface of the slip ring. The slip ring is threadedly engaged with the collar through the ball balls. The outer surface of each set of extrusion blocks is provided with a sliding groove. Multiple sets of protrusions are fixedly disposed on the inner wall of the slip ring. Each set of protrusions is slidably disposed in the sliding groove. The bottom of the rigid pipe and the top of the pipe are fixedly installed with the same soft rubber sheet.

[0009] Furthermore, multiple sets of guide grooves are equidistantly formed on the inner circumference of the rigid tube. A guide plate is slidably arranged in each set of guide grooves. Each set of guide plates is fixedly connected to the extrusion block. A second thrust spring is fixedly connected to the guide plate. The end of the second thrust spring away from the guide plate is fixedly connected to the inner wall of the guide groove.

[0010] Furthermore, both the rigid tube and the extrusion block are provided with through holes. An extrusion tube is slidably disposed in the through hole of the rigid tube and is fixedly inserted into the through hole of the extrusion block. The extrusion tube extends to the outside of the rigid tube.

[0011] Furthermore, the outer surface of the collar is rotatably sealed with a ring shell, and a sampling chamber is opened inside the ring shell. The outer surface of the extrusion tube is slidably sealed with a guide tube, and a flow hole is opened on the extrusion tube. After the extrusion tube slides, it communicates with the guide tube. The guide tube communicates with the sampling chamber and is fixedly inserted on the ring shell. The top end of the ring shell is fixedly connected to the outer surface of the rigid tube.

[0012] Furthermore, the sampling chamber is provided with multiple sets of stirring plates, and multiple sets of fixing rods are fixedly installed on the outer surface of the collar. Each set of fixing rods is connected to two stirring plates, and two sets of discharge pipes are fixedly inserted into the sampling chamber.

[0013] Furthermore, each set of stirring plates and fixing rods is connected by a tension spring, and the inner wall of the annular shell is provided with an annular groove, which is wavy. A guide rod is fixedly connected to one end of the stirring plate near the inner wall of the annular shell, and the guide rod is located in the annular groove.

[0014] Furthermore, the inner wall of the extrusion block is arranged in an inverted bucket shape, and the inner diameter of the top of the extrusion block is the same as the inner diameter of the rigid tube.

[0015] Furthermore, a mounting plate is fixedly sleeved on the outer surface of the rigid tube, and a driving component is fixedly mounted on the mounting plate, with the gear ring meshing with the output end of the driving component.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] (1) By setting up a pump, hard pipe, pipeline and collar, this application can effectively suck up the silt at the bottom of the river and lake and discharge it to the shore, thereby reducing the silt in the river and lake and improving the water quality. Furthermore, by using the squeezing component, anti-blocking component and sliding rod, when there are stones that can block the pipe opening, the sliding rod will push the stones at the pipe opening open because it is always moving up and down, ensuring that the pipe can normally suck up the silt. This effectively realizes the anti-blocking function of the equipment and can reduce the situation where the silt cannot be normally sucked into the pipe when the stones block the pipe opening.

[0018] (2) By setting up the extrusion assembly and extrusion tube, the guide tube and the ring shell, this application can extract a portion of the silt sample into the sampling chamber at regular intervals during the entire silt extraction process, which facilitates the final detection of the components in the silt and the analysis of the reasons for the impact on the water quality of rivers and lakes. It is not necessary to test the internal components of a large amount of silt extracted to the shore one by one, thus reducing the workload of detection.

[0019] (3) By setting up a driving component, a toothed ring, a collar, a stirring plate and a fixing rod, this application can stir the sludge sample in the sampling chamber, so that the sludge of different components extracted can be mixed more fully, ensuring the uniformity of the internal components of the sludge and reducing the workload during measurement.

[0020] (4) By setting up a tension spring, a stirring plate, an annular groove and a guide rod, when the collar rotates, it carries the fixed rod and the stirring plate to rotate. Under the action of the wavy annular groove, the stirring plate will slide along the path of the wavy annular groove through the guide rod, thereby realizing the action of the stirring plate shaking up and down and rotating in the sampling chamber, improving the uniformity of the internal components of the sludge. Attached Figure Description

[0021] Figure 1 This is a top view of the overall structure of the present invention;

[0022] Figure 2 This is a front view of the overall structure of the present invention;

[0023] Figure 3 This is a cross-sectional view of the internal structure of the present invention;

[0024] Figure 4 This is an exploded view of the structural connecting block, extrusion block, and sampling chamber of the present invention;

[0025] Figure 5 This is an exploded view of the extrusion tube and the guide tube of the present invention;

[0026] Figure 6 This is a cross-sectional view of the internal structure of the structural ring shell of the present invention;

[0027] Figure 7For the present invention Figure 6 Enlarged view of the structure at point A in the middle;

[0028] Figure 8 This is a schematic diagram illustrating the bonding of the soft rubber sheet of the present invention with a rigid pipe and conduit.

[0029] Explanation of the labels in the diagram:

[0030] 1. Pump; 2. Rigid pipe; 3. Connecting block; 4. Hose; 5. Collar; 6. Pipe; 7. Toothed ring; 8. Extrusion assembly; 9. Anti-clogging assembly; 10. Sleeve plate; 11. Slide rod; 12. Inclined plate; 13. First thrust spring; 14. Extrusion block; 15. Slip ring; 16. Slide groove; 17. Guide groove; 18. Guide plate; 19. Second thrust spring; 20. Through hole; 21. Extrusion tube; 22. Flow hole; 23. Ring shell; 24. Sampling chamber; 25. Guide tube; 26. Stirring plate; 27. Fixing rod; 28. Discharge pipe; 29. ​​Tension spring; 30. Ring groove; 31. Guide rod; 32. Mounting plate; 33. Drive component. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1 to 8 A clog-resistant river and lake dredging device for water conservancy surveying includes a pump 1, a rigid pipe 2 fixedly installed at the lower end of the pump 1, a flexible hose 4 fixedly inserted at the upper end of the pump 1, multiple sets of connecting blocks 3 fixedly connected to the bottom of the rigid pipe 2, a collar 5 rotatably fitted on the outer surface of each set of connecting blocks 3, and the same pipe 6 fixedly connected to the bottom of each set of connecting blocks 3, a toothed ring 7 fixedly installed at the bottom of the collar 5, a squeezing component 8 provided inside the collar 5 for squeezing silt, an anti-clogging component 9 provided inside the pipe 6 for moving up and down inside the pipe 6, the anti-clogging component 9 including a sleeve plate 10 fixedly connected to the inner wall of the rigid pipe 2, a sliding rod 11 slidably fitted at the center of the sleeve plate 10, multiple sets of inclined plates 12 fixedly fitted on the sliding rod 11, the squeezing component 8 causing the sliding rod 11 to slide upward through the inclined plates 12, and a first thrust spring 13 fitted on the outer surface of the sliding rod 11.

[0033] Multiple sets of guide grooves 17 are equidistantly opened on the inner circumference of the rigid tube 2. A guide plate 18 is slidably arranged in each set of guide grooves 17. Each set of guide plates 18 is fixedly connected to the extrusion block 14. A second thrust spring 19 is fixedly connected to the guide plate 18. The end of the second thrust spring 19 away from the guide plate 18 is fixedly connected to the inner wall of the guide groove 17.

[0034] The top end of the first thrust spring 13 is fixedly connected to the bottom end of the sleeve plate 10. The bottom end of the first thrust spring 13 is also fixedly connected to the top end of multiple sets of inclined plates 12. The horizontal position height of each set of inclined plates 12 is the same as the horizontal position height of the anti-blocking component 9.

[0035] Multiple sets of connecting blocks 3 are arranged equidistantly around the circumference. The extrusion assembly 8 includes multiple sets of extrusion blocks 14 that are slidably disposed on the top of the pipe 6. The extrusion blocks 14 and the connecting blocks 3 are arranged in a bucket shape. Each set of extrusion blocks 14 and the connecting blocks 3 are located inside the collar 5. The inner wall of the collar 5 is provided with a reciprocating threaded groove. A slip ring 15 is also provided between the collar 5 and the extrusion blocks 14. Balls are slidably disposed on the outer surface of the slip ring 15. The slip ring 15 is threadedly engaged with the collar 5 through the ball. Each set of extrusion blocks 14 is provided with a sliding groove 16 on its outer surface. Multiple sets of protrusions are fixedly disposed on the inner wall of the slip ring 15. Each set of protrusions is slidably disposed in the sliding groove 16. The bottom of the rigid pipe 2 and the top of the pipe 6 are fixedly installed with the same soft rubber sheet.

[0036] A mounting plate 32 is fixedly sleeved on the outer surface of the rigid tube 2, and a drive component 33 is fixedly mounted on the mounting plate 32. The gear ring 7 meshes with the output end of the drive component 33.

[0037] When using the equipment to extract silt from rivers and lakes, first, the end of the equipment with the pump 1 is placed in the water. Then, the mounting plate 32 is fixed to the ground with pins. Next, the pump 1 is started to suck the silt from the bottom of the river or lake through the rigid pipe 2 and the pipeline 6. Simultaneously, the drive unit 33 is activated, causing the drive unit 33 to rotate with the collar 5. Due to the limiting effect of the sliding groove 16 on the slip ring 15, the collar 5 will rotate relative to the slip ring 15. Simultaneously, with the cooperation of the reciprocating threaded groove and the ball bearings, the slip ring 15 will rotate relative to the collar 5. As the ring 5 moves vertically upward, the inner wall of the sliding ring 15 will squeeze each set of squeezing blocks 14 during the upward movement. Then each set of squeezing blocks 14 will move closer to each other, and the inner wall of each set of squeezing blocks 14 will contact the inclined plate 12 and squeeze the inclined plate 12. Due to the inclined surface of the inner wall of the squeezing block 14, the entire sliding rod 11 will move downward, thereby pushing out the stone blocking the pipe 6 opening. This can reduce the situation where the sludge cannot be properly sucked into the pipe 6 when the stone blocks the pipe 6 opening.

[0038] When the collar 5 rotates, the entire slip ring 15 moves downward relative to the pressing block 14 under the cooperation of the reciprocating thread groove and the ball. Then, under the action of the second thrust spring 19, each set of pressing blocks 14 will move away from each other. Then, when there is no pressing block 14, the first thrust spring 13, which is in a stretched state, rebounds, thereby pulling the slide rod 11 upward to achieve the reset effect.

[0039] It should be noted here that the drive component 33 consists of a drive motor and a gear. The gear is fixedly sleeved on the output end of the drive motor, and the gear meshes with the gear ring 7.

[0040] The function of the soft rubber sheet is to deform and fit against the inner surface of the extrusion block 14 when the extrusion block 14 moves, and at the same time, to ensure the sealing of the rigid pipe 2 and the pipe 6. Since there is a through hole 20, the soft rubber sheet also needs to be perforated to fit the through hole 20. The top of the soft rubber sheet fits against the inner wall of the bottom of the rigid pipe 2, and the bottom of the soft rubber sheet fits against the inner wall of the top of the pipe 6.

[0041] like Figure 2 and Figure 3 As shown, both the rigid tube 2 and the extrusion block 14 have through holes 20. An extrusion tube 21 is slidably disposed in the through hole 20 of the rigid tube 2. The extrusion tube 21 is fixedly inserted into the through hole 20 of the extrusion block 14 and extends to the outside of the rigid tube 2.

[0042] The inner wall of the extrusion block 14 is arranged in an inverted bucket shape, and the inner diameter of the top of the extrusion block 14 is the same as the inner diameter of the rigid tube 2.

[0043] The outer surface of the collar 5 is rotatably sealed with an annular shell 23, and a sampling chamber 24 is opened inside the annular shell 23. The outer surface of the extrusion tube 21 is slidably sealed with a guide tube 25, and a flow hole 22 is opened on the extrusion tube 21. After the extrusion tube 21 slides, it communicates with the guide tube 25. The guide tube 25 communicates with the sampling chamber 24, and the guide tube 25 is fixedly inserted into the annular shell 23. The top end of the annular shell 23 is fixedly connected to the outer surface of the rigid tube 2.

[0044] As each set of extrusion blocks 14 approaches each other, the inner diameter of the extrusion block 14 gradually decreases until it is smaller than the inner diameter of the pipe 6. Due to the reduced internal space of the pipe 6, the sludge transported in the pipe 6 is compressed, and thus the sludge enters the through hole 20 of the extrusion block 14. The extrusion tube 21 moves with the extrusion block 14, thereby connecting the flow hole 22 on the extrusion tube 21 with the guide tube 25, and entering the sampling chamber 24 through the extrusion tube 21 and the guide tube 25. During the entire process of sludge extraction, a portion of sludge sample can be extracted into the sampling chamber 24 at regular intervals, which facilitates the final detection of the components in the sludge and analysis of the reasons for the impact on river and lake water quality. It is not necessary to test the internal components of a large amount of sludge extracted to the shore one by one, thus reducing the workload of detection.

[0045] like Figure 2 , Figure 6 and Figure 7 As shown, the sampling chamber 24 is provided with multiple sets of stirring plates 26, and multiple sets of fixing rods 27 are fixedly installed on the outer surface of the collar 5. Each set of fixing rods 27 is connected to two stirring plates 26 respectively, and two sets of discharge pipes 28 are fixedly inserted into the sampling chamber 24.

[0046] Since the water quality of rivers and lakes is monitored and controlled over a long period of time, and the silt at the bottom can be used as agricultural fertilizer, it is necessary to measure the fertility of the silt. In order to reduce the workload of measurement, the silt sample in the sampling chamber 24 needs to be stirred. First, when the collar 5 starts to rotate, it will drive the stirring plate 26 to rotate in the sampling chamber 24 through the fixed rod 27. Finally, the silt of different components extracted can be mixed more thoroughly to ensure the uniformity of the internal components of the silt and reduce the workload of measurement.

[0047] It should be noted that the two sets of discharge pipes 28 are arranged one above the other. The upper discharge pipe 28 is used to balance the sampling chamber 24 and the external air pressure, while the lower discharge pipe 28 has a valve that can be manually opened to discharge the mixed sludge sample.

[0048] like Figure 2 , Figure 6 and Figure 7 As shown, each set of stirring plates 26 and fixing rods 27 are connected by tension springs 29. The inner wall of the ring shell 23 is provided with an annular groove 30, which is wavy. One end of the stirring plate 26 near the inner wall of the ring shell 23 is fixedly connected to a guide rod 31, which is located in the annular groove 30.

[0049] When the collar 5 rotates, it causes the fixing rod 27 and the stirring plate 26 to rotate as well. Under the action of the wavy annular groove 30, the stirring plate 26 will slide along the path of the wavy annular groove 30 through the guide rod 31, thereby realizing the action of the stirring plate 26 shaking up and down and rotating in the sampling chamber 24. This can further improve the mixing effect of the sludge sample in the sampling chamber 24 and improve the uniformity of the internal components of the sludge.

[0050] Instructions for use: When using the equipment to extract silt from rivers and lakes, first place the end of the equipment with the pump 1 into the water. Then, fix the mounting plate 32 to the ground with pins. Next, start the pump 1 to suck the silt from the bottom of the river or lake through the rigid pipe 2 and the pipeline 6. At the same time, start the drive unit 33, causing the drive unit 33 to rotate with the collar 5. Due to the limiting effect of the sliding groove 16 on the slip ring 15, the collar 5 will rotate relative to the slip ring 15. Simultaneously, with the cooperation of the reciprocating threaded groove and the ball bearings, the slip ring 15 will rotate relative to the slip ring 15. As the collar 5 moves vertically upward, during the upward movement of the slip ring 15, the inner wall of the slip ring 15 will squeeze each set of squeezing blocks 14. Then, each set of squeezing blocks 14 will move closer to each other, and the inner wall of each set of squeezing blocks 14 will contact and squeeze the inclined plate 12. Due to the existence of the inclined surface of the inner wall of the squeezing block 14, the entire sliding rod 11 will move downward, thereby pushing out the stone blocking the pipe 6 opening. This can reduce the situation where sludge cannot be properly sucked into the pipe 6 when the stone blocks the pipe 6 opening.

[0051] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A river and lake dredging device for water conservancy surveying, comprising a pump (1), a rigid pipe (2) fixedly installed at the lower end of the pump (1), a flexible hose (4) fixedly inserted at the upper end of the pump (1), and multiple sets of connecting blocks (3) fixedly connected to the bottom of the rigid pipe (2), characterized in that: Each set of connecting blocks (3) has a collar (5) rotatably fitted on its outer surface. The bottom of each set of connecting blocks (3) is fixedly connected to the same pipe (6). A toothed ring (7) is fixedly installed at the bottom of the collar (5). An extrusion assembly (8) is provided inside the collar (5). The extrusion assembly (8) is used to extrude sludge. An anti-blocking assembly (9) is provided inside the pipe (6). The anti-blocking assembly (9) is used to move up and down inside the pipe (6). The anti-blocking assembly (9) includes a sleeve plate (10) fixedly connected to the inner wall of the rigid pipe (2). A sliding rod (11) is slidably fitted at the center of the sleeve plate (10). Multiple sets of inclined plates (12) are fixedly fitted on the sliding rod (11). The extrusion assembly (8) causes the sliding rod (11) to slide upward through the inclined plates (12). A first thrust spring (13) is fitted on the outer surface of the sliding rod (11). The top end of the first thrust spring (13) is fixedly connected to the bottom end of the sleeve plate (10), and the bottom end of the first thrust spring (13) is simultaneously fixedly connected to the top end of multiple sets of inclined plates (12). The horizontal position height of each set of inclined plates (12) is the same as the horizontal position height of the anti-blocking component (9). Multiple sets of connecting blocks (3) are arranged circumferentially at equal intervals. The extrusion assembly (8) includes multiple sets of extrusion blocks (14) that are slidably arranged on the top of the pipe (6). The extrusion blocks (14) and connecting blocks (3) are arranged in a bucket shape. Each set of extrusion blocks (14) and connecting blocks (3) are located inside the collar (5). The inner wall of the collar (5) is provided with a reciprocating thread groove. A slip ring (15) is also provided between the collar (5) and the extrusion blocks (14). A ball is slidably arranged on the outer surface of the slip ring (15). The slip ring (15) is threadedly engaged with the collar (5) through the ball. A groove (16) is provided on the outer surface of each set of extrusion blocks (14). Multiple sets of protrusions are fixedly arranged on the inner wall of the slip ring (15). Each set of protrusions is slidably arranged in the groove (16). The bottom of the rigid pipe (2) and the top of the pipe (6) are fixedly installed with the same soft rubber sheet.

2. The anti-clogging river and lake dredging device for water conservancy surveying according to claim 1, characterized in that: The rigid tube (2) has multiple sets of guide grooves (17) equidistantly arranged on its inner circumference. Each set of guide grooves (17) has a guide plate (18) slidably arranged in it. Each set of guide plates (18) is fixedly connected to the extrusion block (14). A second thrust spring (19) is fixedly connected to the guide plate (18). The end of the second thrust spring (19) away from the guide plate (18) is fixedly connected to the inner wall of the guide groove (17).

3. The anti-clogging river and lake dredging device for water conservancy surveying according to claim 2, characterized in that: Both the rigid tube (2) and the extrusion block (14) are provided with through holes (20). An extrusion tube (21) is slidably disposed in the through hole (20) of the rigid tube (2). The extrusion tube (21) is fixedly inserted in the through hole (20) of the extrusion block (14). The extrusion tube (21) extends to the outside of the rigid tube (2).

4. The anti-clogging river and lake dredging device for water conservancy surveying according to claim 3, characterized in that: The outer surface of the collar (5) is rotatably sealed with a ring shell (23), and a sampling chamber (24) is provided inside the ring shell (23). The outer surface of the extrusion tube (21) is slidably sealed with a guide tube (25). A flow hole (22) is provided on the extrusion tube (21). After the extrusion tube (21) slides, it communicates with the guide tube (25). The guide tube (25) communicates with the sampling chamber (24), and the guide tube (25) is fixedly inserted on the ring shell (23). The top end of the ring shell (23) is fixedly connected to the outer surface of the hard tube (2).

5. A river and lake dredging device for water conservancy surveying according to claim 4, characterized in that: The sampling chamber (24) is provided with multiple sets of stirring plates (26), and multiple sets of fixing rods (27) are fixedly installed on the outer surface of the collar (5). Each set of fixing rods (27) is connected to two stirring plates (26) respectively, and two sets of discharge pipes (28) are fixedly inserted into the sampling chamber (24).

6. The anti-clogging river and lake dredging device for water conservancy surveying according to claim 5, characterized in that: Each set of stirring plates (26) and fixing rods (27) are connected by tension springs (29). The inner wall of the ring shell (23) is provided with an annular groove (30), which is wavy. The end of the stirring plate (26) near the inner wall of the ring shell (23) is fixedly connected to a guide rod (31), which is located in the annular groove (30).

7. A river and lake dredging device for water conservancy surveying as described in claim 6, characterized in that: The inner wall of the extrusion block (14) is arranged in an inverted bucket shape, and the inner diameter of the top of the extrusion block (14) is the same as the inner diameter of the rigid tube (2).

8. A river and lake dredging device for water conservancy surveying according to claim 7, characterized in that: The outer surface of the rigid tube (2) is fixedly fitted with a mounting plate (32), and a drive component (33) is fixedly installed on the mounting plate (32). The toothed ring (7) meshes with the output end of the drive component (33).

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