Anti-blocking type river and lake desilting device for water conservancy survey

Abstract

The invention discloses an anti-blocking river and lake desilting device for water conservancy survey, and belongs to the field of water conservancy survey, the anti-blocking river and lake desilting device for water conservancy survey comprises a pump machine, a hard pipe is fixedly mounted at the lower end of the pump machine, multiple sets of connecting blocks are fixedly connected to the bottom of the hard pipe, a gear ring is meshed with the output end of a driving part, and an extrusion assembly is arranged in a lantern ring and used for extruding sludge. And an anti-blocking assembly is arranged in the pipeline. By arranging the pump machine, the hard pipe, the pipeline and the lantern ring, sludge at the bottom of a river or a lake can be effectively sucked and discharged to the shore, the amount of the sludge in the river or the lake is reduced to improve the water quality, and by means of the extrusion assembly, the anti-blocking assembly and a sliding rod, when stone capable of blocking a pipeline opening exists, the sliding rod always moves up and down, and therefore the anti-blocking effect is achieved. When the pipeline is blocked by the stone, the stone at the pipeline opening can be jacked open, the normal sludge suction action of the pipeline is ensured, the anti-blocking function of equipment is effectively realized, and the situation that the sludge cannot be normally sucked into the pipeline when the pipeline opening is blocked by the stone can be reduced.

Description

Technical Field

[0001] The present invention relates to the field of water conservancy survey, and more specifically, to an anti-blocking river and lake dredging device for water conservancy survey. Background Technique

[0002] Water conservancy survey is a very important and basic link in 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] Long-term sediment deposition will reduce the effective volume of rivers and lakes, lower their water storage capacity, affect functions such as flood control, water supply, and irrigation, and the deposited bottom mud contains a large amount of organic matter and pollutants, which will decompose to produce harmful substances such as ammonia nitrogen and sulfide under anaerobic conditions, polluting the water body and affecting the survival of aquatic organisms. When the water quality of rivers and lakes does not meet the standards, dredging work needs to be carried out on rivers and lakes according to water conservancy surveys to improve the water quality of rivers and lakes. Conventional existing river and lake dredging equipment generally uses a pump to suck silt, but there will be stones in the silt. If the stones block the pipeline connected to the pump, the dredging work needs to be stopped at this time to clean the blocked pipeline, which is very troublesome and time-consuming. Therefore, an anti-blocking river and lake dredging device for water conservancy survey is proposed. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide an anti-blocking river and lake dredging device for water conservancy survey.

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

[0006] An anti-blocking river and lake dredging device for water conservancy survey, including a pump. A hard pipe is fixedly installed at the lower end of the pump, and a flexible pipe is fixedly inserted at the upper end of the pump. Multiple connecting blocks are fixedly connected to the bottom of the hard pipe. A collar is rotatably sleeved on the outer surface of each connecting block. The bottom of each connecting block is fixedly connected to the same pipeline. A toothed ring is fixedly installed at the bottom of the collar. An extrusion assembly is arranged inside the collar for extruding silt. An anti-blocking assembly is arranged inside the pipeline for moving up and down inside the pipeline. The anti-blocking assembly includes a sleeve plate fixedly connected to the inner wall of the hard pipe. A sliding rod is slidably sleeved at the center of the sleeve plate. Multiple inclined plates are fixedly sleeved on the sliding rod. The extrusion assembly makes the sliding rod slide upward through the inclined plates. A first thrust spring is sleeved 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 inclined plates. The horizontal position height of each inclined plate is the same as the horizontal position height of the anti-blocking assembly.

[0008] Further, multiple groups of the connecting blocks are arranged at equal intervals in a circle. The extrusion assembly includes multiple groups of extrusion blocks slidably arranged on the top of the pipeline. The extrusion blocks and the connecting blocks are arranged in a hopper shape. Each group of the extrusion blocks and the connecting blocks is located inside the collar. A reciprocating thread groove is formed on the inner wall of the collar. A sliding ring is further arranged between the collar and the extrusion blocks. Ball bearings are slidably arranged on the outer surface of the sliding ring. The sliding ring is in threaded cooperation with the collar through the ball bearings. A sliding groove is formed on the outer surface of each group of the extrusion blocks. Multiple groups of protrusions are fixedly arranged on the inner wall of the sliding ring. Each group of the protrusions is respectively slidably arranged in the sliding groove. The bottom of the rigid pipe is fixedly installed with the same soft rubber sheet as the top of the pipeline.

[0009] Further, multiple groups of guiding grooves are equidistantly arranged in a circle inside the rigid pipe. A guiding plate is slidably arranged in each group of the guiding grooves. Each group of the guiding plates is fixedly connected to the extrusion blocks respectively. A second thrust spring is fixedly connected to the guiding plate. The end of the second thrust spring away from the guiding plate is fixedly connected to the inner wall of the guiding groove.

[0010] Further, through holes are formed on both the rigid pipe and the extrusion blocks. An extrusion pipe is slidably arranged in the through hole of the rigid pipe. The extrusion pipe is fixedly inserted into the through hole of the extrusion block. The extrusion pipe extends to the outside of the rigid pipe.

[0011] Further, a ring shell is rotatably and sealingly sleeved on the outer surface of the collar. A sampling cavity is formed inside the ring shell. A diversion pipe is slidably and sealingly sleeved on the outer surface of the extrusion pipe. A flow hole is formed on the extrusion pipe. After the extrusion pipe slides, it is communicated with the diversion pipe. The diversion pipe is communicated with the sampling cavity. The diversion pipe is fixedly inserted on the ring shell. The top end of the ring shell is fixedly connected to the outer surface of the rigid pipe.

[0012] Further, multiple groups of stirring plates are arranged in the sampling cavity. Multiple groups of fixing rods are fixedly installed on the outer surface of the collar. Each group of the fixing rods is respectively connected to two stirring plates. Two discharge pipes are fixedly inserted on the sampling cavity.

[0013] Further, each group of the stirring plates and the fixing rods are connected through a tension spring. A ring groove is formed on the inner wall of the ring shell. The ring groove is in a wave shape. One end of the stirring plate close to the inner wall of the ring shell is fixedly connected to a guiding rod. The guiding rod is located in the ring groove.

[0014] Further, the inner wall of the extrusion block is arranged in an inverted hopper shape. The inner diameter of the top end of the extrusion block is the same as the inner diameter of the rigid pipe.

[0015] Further, a mounting plate is fixedly sleeved on the outer surface of the rigid pipe. A driving member is fixedly installed on the mounting plate. A gear ring is meshed with the output end of the driving member.

[0016] Compared with the prior art, the beneficial effects of the present invention: (1) By providing a pump, a rigid pipe, a conduit, and a collar, the present application can effectively suck the silt at the bottom of rivers and lakes and discharge it to the shore, improving water quality by reducing the silt in rivers and lakes. Also, through an extrusion assembly, an anti-blocking assembly, and a sliding rod, when there are stones that can block the conduit opening, since the sliding rod is always moving up and down, the stones at the conduit opening will be pushed away, ensuring the normal operation of sucking silt into the conduit and effectively realizing the anti-blocking function of the device, reducing the situation where silt cannot be normally sucked into the conduit when blocked by stones at the conduit opening; (2) By providing an extrusion assembly, an extrusion pipe, a diversion pipe, and a ring shell, during the entire process of sucking silt, a portion of the silt sample can be extracted into the sampling chamber at regular intervals, facilitating the final detection of the components in the silt and analyzing the reasons for the impact on the water quality of rivers and lakes, eliminating the need to detect the internal components of a large amount of silt pumped to the shore one by one, reducing the workload of detection; (3) By providing a driving member, a toothed ring, a collar, a stirring plate, and a fixing rod, the silt sample in the sampling chamber can be stirred, enabling the silt with different components pumped up to be more fully mixed, ensuring the uniformity of the internal components of the silt being detected, and reducing the workload during measurement; (4) By providing a tension spring, a stirring plate, a ring groove, and a guide rod, when the collar rotates, driving the fixing rod and the stirring plate to rotate, under the action of the wavy ring groove, the stirring plate will slide along the path of the wavy ring 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 silt. Description of the Drawings

[0017] Figure 1 Top view of the overall structure of the present invention; Figure 2 Front view of the overall structure of the present invention; Figure 3 Cross-sectional view of the internal structure of the present invention; Figure 4 Exploded view of the structure connection block, extrusion block, and sampling chamber of the present invention; Figure 5 Exploded view of the extrusion pipe and diversion pipe of the structure of the present invention; Figure 6 Cross-sectional view of the internal structure of the ring shell of the structure of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of the structure at A in; Figure 8 Fitting schematic diagram of the soft rubber sheet with the rigid pipe and the conduit of the present invention.

[0018] Explanation of the reference numerals in the drawings: 1. Pump; 2. Hard pipe; 3. Connecting block; 4. Flexible pipe; 5. Collar; 6. Pipe; 7. Tooth ring; 8. Extrusion assembly; 9. Anti-blocking assembly; 10. Sleeve plate; 11. Slide bar; 12. Inclined plate; 13. First thrust spring; 14. Extrusion block; 15. Slide ring; 16. Chute; 17. Guide groove; 18. Guide plate; 19. Second thrust spring; 20. Through hole; 21. Extrusion pipe; 22. Flow hole; 23. Ring shell; 24. Sampling chamber; 25. Diversion pipe; 26. Stirring plate; 27. Fixed rod; 28. Discharge pipe; 29. Tension spring; 30. Ring groove; 31. Guide rod; 32. Mounting plate; 33. Driving part. Detailed implementation manner

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1 to 8 , an anti-blocking type river and lake dredging device for water conservancy survey, including a pump 1, a hard pipe 2 is fixedly installed at the lower end of the pump 1, a flexible pipe 4 is fixedly inserted at the upper end of the pump 1, a plurality of groups of connecting blocks 3 are fixedly connected to the bottom of the hard pipe 2, a collar 5 is rotatably sleeved on the outer surface of each group of connecting blocks 3, the bottom of each group of connecting blocks 3 is fixedly connected to the same pipe 6, a tooth ring 7 is fixedly installed at the bottom of the collar 5, an extrusion assembly 8 is arranged inside the collar 5, the extrusion assembly 8 is used for extruding silt, an anti-blocking assembly 9 is arranged inside the pipe 6, the anti-blocking assembly 9 is used for moving 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 hard pipe 2, a slide bar 11 is slidably sleeved at the center of the sleeve plate 10, a plurality of groups of inclined plates 12 are fixedly sleeved on the slide bar 11, the extrusion assembly 8 makes the slide bar 11 slide upward through the inclined plates 12, and a first thrust spring 13 is sleeved on the outer surface of the slide bar 11.

[0021] A plurality of groups of guide grooves 17 are equidistantly opened on the inner circumference of the hard pipe 2, a guide plate 18 is slidably arranged in each group of guide grooves 17, each group of guide plates 18 is fixedly connected to an extrusion block 14 respectively, a second thrust spring 19 is fixedly connected to the guide plate 18, and 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.

[0022] 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 simultaneously fixedly connected to the top ends of a plurality of groups of inclined plates 12, and the horizontal position height of each group of inclined plates 12 is the same as the horizontal position height of the anti-blocking assembly 9.

[0023] A plurality of connecting blocks 3 are arranged at equal circumferential intervals. The extrusion assembly 8 includes a plurality of extrusion blocks 14 slidably arranged on the top of the pipeline 6. The extrusion blocks 14 and the connecting blocks 3 are arranged in a funnel shape. Each group of extrusion blocks 14 and connecting blocks 3 are located inside the collar 5. A reciprocating thread groove is formed on the inner wall of the collar 5. A sliding ring 15 is further arranged between the collar 5 and the extrusion blocks 14. Ball beads are slidably arranged on the outer surface of the sliding ring 15. The sliding ring 15 is in threaded cooperation with the collar 5 through the ball beads. A chute 16 is formed on the outer surface of each group of extrusion blocks 14. A plurality of protrusions are fixedly arranged on the inner wall of the sliding ring 15. Each group of protrusions are respectively slidably arranged in the chute 16. The bottom of the rigid pipe 2 and the top of the pipeline 6 are fixedly installed with the same soft rubber sheet.

[0024] An installation plate 32 is fixedly sleeved on the outer surface of the rigid pipe 2. A driving member 33 is fixedly installed on the installation plate 32. The toothed ring 7 is meshed with the output end of the driving member 33.

[0025] When using the device to extract the silt inside the river or lake, first place the end of the device with the pump 1 into the water, then fix the installation plate 32 to the ground with pins. Subsequently, 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 driving member 33 to make the driving member 33 drive the collar 5 to rotate. Due to the limiting effect of the chute 16 on the sliding ring 15, the collar 5 will rotate relative to the sliding ring 15. At the same time, under the cooperation of the reciprocating thread groove and the ball beads, the sliding ring 15 will move vertically upward relative to the collar 5. During the upward movement of the sliding ring 15, the inner wall of the sliding ring 15 will squeeze each group of extrusion blocks 14. Subsequently, each group of extrusion blocks 14 will approach each other. Furthermore, the inner wall of each group of extrusion blocks 14 will contact the inclined plate 12 and squeeze the inclined plate 12. Due to the existence of the inclined surface on the inner wall of the extrusion block 14, the entire sliding rod 11 will move downward, thereby ejecting the stones blocking the mouth of the pipeline 6, which can reduce the situation where the silt cannot be normally sucked into the pipeline 6 when the stones block the mouth of the pipeline 6. When the collar 5 rotates, under the cooperation of the reciprocating thread groove and the ball beads, the entire sliding ring 15 moves downward relative to the extrusion blocks 14. Furthermore, under the action of the second thrust spring 19, each group of extrusion blocks 14 will move away from each other. Furthermore, in the absence of the extrusion blocks 14, the first thrust spring 13 in the stretched state rebounds at this time, thereby pulling the sliding rod 11 upward to achieve the reset effect. It should be particularly noted here that: the driving member 33 is composed of a driving motor and a gear. The gear is fixedly sleeved on the output end of the driving motor, and the gear is meshed with the toothed ring 7. The function of the soft rubber sheet is: it can deform and fit on the inner surface of the extrusion block 14 when the extrusion block 14 moves, and at the same time, it can also ensure the sealing performance at the rigid pipe 2 and the pipeline 6. At the same time, due to the existence of the through hole 20, the soft rubber sheet also needs to be perforated to adapt to the through hole 20. The top of the soft rubber sheet fits on the inner wall of the bottom of the rigid pipe 2, and the bottom of the soft rubber sheet fits on the inner wall of the top of the pipeline 6.

[0026] As Figure 2 and Figure 3 shown, through holes 20 are formed in both the rigid tube 2 and the extrusion block 14. 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 the extrusion tube 21 extends to the outside of the rigid tube 2.

[0027] The inner wall of the extrusion block 14 is arranged in an inverted hopper shape, and the inner diameter of the top end of the extrusion block 14 is the same as the inner diameter of the rigid tube 2.

[0028] A ring shell 23 is rotatably and sealingly sleeved on the outer surface of the collar 5, and a sampling chamber 24 is formed inside the ring shell 23. A flow guide tube 25 is slidably and sealingly sleeved on the outer surface of the extrusion tube 21. A flow hole 22 is formed in the extrusion tube 21. After the extrusion tube 21 slides, it communicates with the flow guide tube 25. The flow guide tube 25 communicates with the sampling chamber 24, and the flow guide tube 25 is fixedly inserted into the ring shell 23. The top end of the ring shell 23 is fixedly connected to the outer surface of the rigid tube 2.

[0029] When each group of extrusion blocks 14 approach each other, when the inner diameter of the extrusion block 14 gradually decreases to be smaller than the inner diameter of the pipeline 6, due to the reduction of the internal space of the pipeline 6, the silt transported in the pipeline 6 is squeezed, so the silt will enter the through hole 20 of the extrusion block 14. The extrusion tube 21 moves along with the extrusion block 14, so that the flow hole 22 on the extrusion tube 21 communicates with the flow guide tube 25, and enters the sampling chamber 24 through the extrusion tube 21 and the flow guide tube 25. During the whole process of extracting silt, a part of the silt sample can be extracted into the sampling chamber 24 every once in a while, which is convenient for finally detecting the components in the silt and analyzing the reasons for the impact on the water quality of rivers and lakes. There is no need to detect the internal components one by one in a large amount of silt pumped to the shore, reducing the workload of detection.

[0030] As Figure 2 , Figure 6 and Figure 7 shown, a plurality of stirring plates 26 are arranged in the sampling chamber 24. A plurality of fixing rods 27 are fixedly installed on the outer surface of the collar 5. Each group of fixing rods 27 is respectively connected to two stirring plates 26. Two discharge pipes 28 are fixedly inserted into the sampling chamber 24.

[0031] Since the water quality of rivers and lakes is detected and controlled in the long term, the bottom silt can be used as agricultural fertilizer. Therefore, it is necessary to measure the fertility of the silt. In order to reduce the workload during measurement, it is necessary to stir the silt sample in the sampling chamber 24. First, when the collar 5 starts to rotate, it will drive the stirring plates 26 to rotate in the sampling chamber 24 through the fixing rods 27, and finally make the silt with different components extracted more fully mixed, ensuring the average of detecting the internal components of the silt, so as to reduce the workload during measurement; It should be specifically noted here that the two groups of discharge pipes 28 are arranged one above the other. The upper discharge pipe 28 is used to balance the air pressure in the sampling chamber 24 and the outside. There is a valve on the lower discharge pipe 28, and the valve can be manually opened to open the discharge pipe 28 to discharge the mixed sludge sample.

[0032] As Figure 2 , Figure 6 and Figure 7 shown, each group of stirring plates 26 and fixed rods 27 are connected by tension springs 29. A ring groove 30 is formed on the inner wall of the ring shell 23. The ring groove 30 is wavy. One end of the stirring plate 26 close to the inner wall of the ring shell 23 is fixedly connected to a guide rod 31, and the guide rod 31 is located in the ring groove 30.

[0033] When the collar 5 rotates, driving the fixed rod 27 and the stirring plate 26 to rotate. Under the action of the wavy ring groove 30, the stirring plate 26 will slide along the path of the wavy ring 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, which 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.

[0034] Usage method: When using the device to extract the sludge in the river or lake, first place the end of the device with the pump 1 into the water, then fix the mounting plate 32 to the ground with pins. Subsequently, start the pump 1 to suck the sludge from the bottom of the river or lake through the rigid pipe 2 and the pipe 6. At the same time, start the driving member 33, so that the driving member 33 drives the collar 5 to rotate. Due to the limiting effect of the chute 16 on the sliding ring 15, the collar 5 will rotate relative to the sliding ring 15. At the same time, under the cooperation of the reciprocating thread groove and the ball, the sliding ring 15 will move vertically upward relative to the collar 5. During the upward movement of the sliding ring 15, the inner wall of the sliding ring 15 will squeeze each group of extrusion blocks 14. Subsequently, each group of extrusion blocks 14 will approach each other, and then the inner walls of each group of extrusion blocks 14 will contact the inclined plate 12 and squeeze the inclined plate 12. Due to the existence of the inclined surface on the inner wall of the extrusion block 14, the entire sliding rod 11 will move downward, thereby pushing out the stones blocking the mouth of the pipe 6, which can reduce the situation where the sludge cannot be normally sucked into the pipe 6 when the stones block the mouth of the pipe 6.

[0035] The above is only a preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A clogging-proof river and lake dredging device for water conservancy survey, comprising a pump (1), a rigid pipe (2) is fixedly installed at the lower end of the pump (1), a flexible pipe (4) is fixedly inserted at the upper end of the pump (1), and a plurality of connecting blocks (3) are fixedly connected to the bottom of the rigid pipe (2), and it is characterized in that: A collar (5) is rotatably sleeved on the outer surface of each connecting block (3). The bottom of each group 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 arranged inside the collar (5), and the extrusion assembly (8) is used for extruding silt. An anti-blocking assembly (9) is arranged inside the pipe (6), and the anti-blocking assembly (9) is used for moving 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 hard pipe (2). A sliding rod (11) is slidably sleeved at the center of the sleeve plate (10). A plurality of inclined plates (12) are fixedly sleeved 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 sleeved on the outer surface of the sliding rod (11).

2. The anti-blocking type river and lake dredging device for water conservancy survey according to claim 1, wherein: 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 ends of a plurality of inclined plates (12). The horizontal position height of each group of inclined plates (12) is the same as the horizontal position height of the anti-blocking assembly (9).

3. The anti-blocking type river and lake dredging device for water conservancy survey according to claim 2, characterized in that: A plurality of groups of connecting blocks (3) are arranged at equal circumferential intervals. The extrusion assembly (8) includes a plurality of extrusion blocks (14) slidably arranged at the top of the pipe (6). The extrusion blocks (14) and the connecting blocks (3) are arranged in a funnel shape. Each group of extrusion blocks (14) and connecting blocks (3) are located inside the collar (5). A reciprocating thread groove is formed on the inner wall of the collar (5). A sliding ring (15) is further arranged between the collar (5) and the extrusion blocks (14). A ball is slidably arranged on the outer surface of the sliding ring (15). The sliding ring (15) is in threaded cooperation with the collar (5) through the ball. A chute (16) is formed on the outer surface of each group of extrusion blocks (14). A plurality of protrusions are fixedly arranged on the inner wall of the sliding ring (15), and each group of protrusions are respectively slidably arranged in the chute (16). The bottom of the hard pipe (2) and the top of the pipe (6) are fixedly installed with the same soft rubber sheet.

4. The anti-clogging type river and lake dredging device for water conservancy survey according to claim 3, characterized in that: A plurality of groups of guide grooves (17) are circumferentially and equally spaced inside the hard pipe (2). A guide plate (18) is slidably arranged in each group of guide grooves (17). Each group of guide plates (18) are respectively fixedly connected to the extrusion blocks (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).

5. The anti-blocking type river and lake dredging device for water conservancy survey according to claim 4, characterized in that: Through holes (20) are formed on both the hard pipe (2) and the extrusion blocks (14). An extrusion pipe (21) is slidably arranged in the through hole (20) of the hard pipe (2). The extrusion pipe (21) is fixedly inserted into the through hole (20) of the extrusion block (14). The extrusion pipe (21) extends to the outside of the hard pipe (2).

6. The anti-blocking type river and lake dredging device for water conservancy survey according to claim 5, characterized in that: The outer surface of the collar (5) is rotationally and sealingly sleeved with an annular shell (23), and a sampling cavity (24) is formed inside the annular shell (23). The outer surface of the extrusion tube (21) is slidably and sealingly sleeved with a diversion tube (25). A flow hole (22) is formed in the extrusion tube (21). After the extrusion tube (21) slides, it communicates with the diversion tube (25). The diversion tube (25) communicates with the sampling cavity (24), and the diversion 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).

7. A clogging prevention type river and lake dredging device for water conservancy survey according to claim 6, characterized in that: A plurality of groups of stirring plates (26) are arranged in the sampling cavity (24). A plurality of groups of fixing rods (27) are fixedly installed on the outer surface of the collar (5). Each group of the fixing rods (27) is respectively connected to two stirring plates (26). Two groups of discharge pipes (28) are fixedly inserted into the sampling cavity (24).

8. A clogging prevention type river and lake dredging device for water conservancy survey according to claim 7, characterized in that: Each group of the stirring plates (26) and the fixing rods (27) are connected by a tension spring (29). An annular groove (30) is formed in the inner wall of the annular shell (23). The annular groove (30) is wavy. One end of the stirring plate (26) close to the inner wall of the annular shell (23) is fixedly connected to a guide rod (31), and the guide rod (31) is located in the annular groove (30).

9. The anti-clogging river and lake dredging device for water conservancy survey according to claim 8, characterized in that: The inner wall of the extrusion block (14) is arranged in an inverted hopper shape, and the inner diameter of the top end of the extrusion block (14) is the same as the inner diameter of the rigid tube (2).

10. A clogging-proof river and lake dredging device for water conservancy survey, characterized in that: An installation plate (32) is fixedly sleeved on the outer surface of the rigid tube (2). A driving member (33) is fixedly installed on the installation plate (32), and the toothed ring (7) is meshed with the output end of the driving member (33).

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