River channel sediment dredging equipment and method

Abstract

The application discloses river channel sediment dredging equipment and a dredging method, and relates to the technical field of environmental engineering. The river channel sediment dredging equipment and the dredging method comprise a ship body, a fixing frame is arranged on one side of the ship body, an electric propeller is fixedly installed at the bottom of the ship body, a U-shaped isolation plate is fixedly installed on the inner wall of the ship body, sludge suction pumps are fixedly installed on the inner walls of the two sides of the U-shaped isolation plate, a sludge suction pipe is fixedly installed on the front side of the ship body and the front side of the fixing frame, and one end of the sludge suction pipe extends to the inner side of the fixing frame. The fixing frame and the fishing assembly are installed on one side of the ship body, the fishing assembly can be driven to move, the fishing assembly can clean the remaining positions of the river channel, the depth of the fixing frame and the fishing assembly in the river channel can be adjusted by cooperation of the adjusting unit, the garbage at the bottom of the river channel can be conveniently cleaned, and the cleaning effect of the river channel is improved.

Description

Technical Field

[0001] This invention relates to the field of environmental engineering technology, and in particular to equipment and methods for dredging riverbed sediment. Background Technology

[0002] The environmental remediation river cleaning equipment, with publication number CN115094855B, relates to the technical field of river cleaning equipment. It includes a filter screen, a first drive motor, a first reciprocating screw, a first slider, a push plate, a guide plate, a crushing box, a connecting shell, a stacking shell, a retrieval assembly, and a waste crushing mechanism. The crushing box and the connecting shell are internally equipped with a waste compression mechanism extending to one side of the outer wall for compressing the crushed waste. By incorporating the waste compression and crushing mechanisms, when the retrieved waste is transported to the stacking shell via a conveyor belt, it is then crushed by the waste crushing mechanism. The crushed waste is further compressed by the waste compression mechanism, thereby reducing its volume for easier transport by workers and preventing excessive waste accumulation that could clog the equipment. This ensures stable operation of the device for retrieving waste from the river.

[0003] However, the aforementioned river cleaning equipment can only clean up garbage in fixed locations within the river channel and cannot clean up other areas of the river. Furthermore, it cannot clean up the garbage and silt deposited at the bottom of the river, thus having certain limitations. Summary of the Invention

[0004] The purpose of this invention is to provide equipment and methods for dredging riverbed sediment to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a riverbed sediment dredging equipment and method, comprising a hull, a fixed frame on one side of the hull, an electric propeller fixedly installed at the bottom of the hull, a U-shaped partition plate fixedly installed on the inner wall of the hull, sludge pumps fixedly installed on the inner walls of both sides of the U-shaped partition plate, a sludge suction pipe fixedly installed at the front of the hull and the front of the fixed frame, one end of the sludge suction pipe extending to the inner side of the fixed frame, and the other end of the sludge suction pipe fixedly connected to the input end of the sludge pump, a discharge pipe fixedly installed at the top of the U-shaped partition plate, one end of the discharge pipe fixedly connected to the output end of the sludge pump, a baffle fixedly installed at the bottom of the inner side of the hull, and further comprising a retrieval assembly installed on the fixed frame for cleaning up garbage in the riverbed, a transport assembly installed below the discharge pipe, a pressing structure installed above the transport assembly for filtering water from the sediment, and an adjustment unit located between the hull and the fixed frame for adjusting the operating depth of the hull in the riverbed.

[0006] Preferably, the salvage assembly includes transport rollers, a salvage net belt, salvage net plates, and a first drive motor. There are two sets of transport rollers, both rotatably mounted on the front and rear inner walls of the fixed frame. The salvage net belt is sleeved on the outer side of the two sets of transport rollers. There are twelve sets of salvage net plates, and the twelve sets of salvage net plates are fixedly mounted at equal intervals on the outer wall of the salvage net belt. The first drive motor is fixedly mounted on the front outer wall of the fixed frame, and the output shaft of the first drive motor is fixedly connected to one end of one set of transport rollers.

[0007] Preferably, a guide plate is fixedly installed on one outer wall of the fixing frame, and the guide plate is inclined.

[0008] Preferably, the transport assembly includes a moving roller, a filter belt, and a second drive motor. Two sets of moving rollers are rotatably mounted on the inner walls of the front and rear sides of the hull. The filter belt is sleeved on the outer side of the two sets of moving rollers. The second drive motor is fixedly mounted on the outer wall of the front side of the hull. The output shaft of the second drive motor is fixedly mounted to one end of one set of moving rollers to filter the extracted sludge.

[0009] Preferably, the pressing structure includes a pressure roller, a mounting frame, a movable rod, a push spring, and a connecting frame. The mounting frame is fixedly installed on the top of the hull, the movable rod is slidably installed on the top of the mounting frame, the push spring is sleeved on the outside of the movable rod, the connecting frame is fixedly installed on the bottom end of the movable rod, and the push spring is located between the mounting frame and the connecting frame. The pressure roller is rotatably installed on the front and rear inner walls of the connecting frame, and the bottom of the pressure roller contacts the outside of the filter belt to press the silt and further filter the water in the silt. The filtered water flows back into the river through the outlet hole, which can greatly improve the water quality of the river.

[0010] Preferably, a silt-pushing plate is fixedly installed on the inner wall of the front and rear sides of the hull. The silt-pushing plate is located above the filter belt and is used to flatten the silt, which facilitates the dewatering of the silt by the pressing structure.

[0011] Preferably, scrapers are fixedly installed on the inner walls of the front and rear sides of the hull. The scrapers are located below the filter belt, and the top of the scrapers is in contact with the outer side of the filter belt, for scraping the silt on the filter belt.

[0012] Preferably, the adjustment unit includes a second support plate, a connecting block, a guide rod, a servo motor, a first bevel gear, a threaded rod, and a second bevel gear. The second support plate is fixedly installed on one side of the outer wall of the fixed frame. Two sets of guide rods are fixedly installed between one side of the outer wall of the fixed frame and the second support plate. The servo motor is fixedly installed on one side of the outer wall of the fixed frame. The first bevel gear is fixedly installed on the output shaft of the servo motor. The threaded rod is rotatably installed between one side of the outer wall of the fixed frame and the second support plate. The second bevel gear is fixedly installed on the outer wall of the threaded rod and meshes with the first bevel gear. The connecting block is fixedly installed on one side of the hull and slidably installed on the outer wall of the two sets of guide rods. The connecting block is threadedly installed on the outer wall of the threaded rod. This allows for adjustment of the depth of the fixed frame and the salvage assembly in the river channel, facilitating the cleaning of garbage at the bottom of the river and improving the cleaning effect of the river channel.

[0013] Preferably, the U-shaped partition plate and scraper divide the interior of the hull into three compartments, which are, from left to right, a garbage collection compartment, a river water collection compartment, and a silt collection compartment. Water outlets are provided on the front and rear sides of the hull, and the water outlets are located on the front and rear sides of the river water collection compartment. A first support plate is fixedly installed on the inner wall of the front and rear sides of the hull. The top of the first support plate is in contact with the inner side of the filter belt to support the filter belt and prevent the filter belt from bending.

[0014] Methods for dredging riverbed sediment include the following steps:

[0015] S1. Preparation: Start the electric propeller, which drives the device to move on the surface of the river; start the servo motor, whose output shaft drives the first bevel gear to rotate, which in turn drives the second bevel gear and the threaded rod to rotate, which in turn drives the connecting block to move on the outer wall of the guide rod, thereby raising and lowering the fixed frame relative to the hull, adjusting the depth of the fixed frame in the river, so that the retrieval component comes into contact with the riverbed garbage, and drives the dredging pipe to come into contact with the silt.

[0016] S2. Salvage: Start the first drive motor. The output shaft of the first drive motor drives the transport roller to rotate. The rotation of the transport roller drives the salvage net belt and salvage net plate to rotate, so that the salvage net belt and salvage net plate can salvage the garbage at the bottom of the river and the garbage in the river water. The salvaged garbage falls into the garbage collection bin of the ship through the guide plate for storage.

[0017] S3. Dredging: Start the dredging pump. The dredging pump extracts the sludge through the dredging pipe, and the sludge falls into the top of the filter belt through the discharge pipe.

[0018] S4. Water Removal: The water in the silt is filtered by the filter belt. The second drive motor is started, and the output shaft of the second drive motor drives the moving roller to rotate. The rotation of the moving roller drives the filter belt and the silt to move. As the filter belt moves the silt, the silt will enter between the filter belt and the pressure roller, so that the pressure roller and the filter belt squeeze the silt to further remove the water in the silt. The dewatered silt is scraped into the silt collection bin by the scraper, while the filtered water will enter the river water collection bin. Finally, the filtered river water will re-enter the river channel through the water outlet.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] (1) The riverbed sediment dredging equipment and dredging method installs the fixing frame and the salvage component on one side of the hull, which can drive the salvage component to move, so that the salvage component can clean the rest of the river. Moreover, through the use of the adjustment unit, the depth of the fixing frame and the salvage component in the river can be adjusted, which is convenient for cleaning the garbage at the bottom of the river and improving the cleaning effect of the river.

[0021] (2) The riverbed sediment dredging equipment and dredging method use a silt pump, silt pumping pipe and silt discharge pipe to pump silt from the riverbed onto a transport component, increasing the depth of the riverbed and greatly increasing the water storage capacity of the riverbed. The silt is filtered by the filter belt of the transport component, and then the silt is pressed by the pressing structure to further filter the water in the silt. The filtered water flows back into the riverbed through the outlet hole, which can greatly improve the water quality of the riverbed. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the adjustment unit of the present invention;

[0025] Figure 3 This is a cross-sectional view of the fixing frame of the present invention;

[0026] Figure 4 This is a cross-sectional view of the hull of the ship of the present invention;

[0027] Figure 5 for Figure 4 Front view;

[0028] Figure 6 for Figure 2 Enlarged view of part A.

[0029] Reference numerals: 1. Hull; 2. Fixing frame; 3. Connecting block; 4. Guide rod; 5. Servo motor; 6. First bevel gear; 7. Threaded rod; 8. Second bevel gear; 9. Transport roller; 10. Salvage net belt; 11. Salvage net plate; 12. First drive motor; 13. Guide plate; 14. Baffle; 15. U-shaped isolation plate; 16. Sludge pump; 17. Sludge suction pipe; 18. Sludge discharge pipe; 19. Moving roller; 20. Filter belt; 21. Second drive motor; 22. Pressure roller; 23. Mounting frame; 24. Movable rod; 25. Push spring; 26. Connecting frame; 27. Sludge pushing plate; 28. First support plate; 29. ​​Electric propeller. Detailed Implementation

[0030] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0031] Please see Figure 1-6 This invention provides a technical solution: a riverbed sediment dredging device and method, comprising a hull 1, a fixed frame 2 on one side of the hull 1, and an electric propeller 29 fixedly installed at the bottom of the hull 1. Activating the electric propeller 29 drives the device to move along the riverbed. A U-shaped partition plate 15 is fixedly installed on the inner wall of the hull 1, and sludge pumps 16 are fixedly installed on the inner walls of both sides of the U-shaped partition plate 15. A sludge suction pipe 17 is fixedly installed on the front side of the hull 1 and the front side of the fixed frame 2. One end of the sludge suction pipe 17 extends to the inner side of the fixed frame 2, and the other end of the sludge suction pipe 17 is connected to the sludge pump. The input end of 16 is fixedly connected, and the top of the U-shaped isolation plate 15 is fixedly installed with a sludge discharge pipe 18. One end of the sludge discharge pipe 18 is fixedly connected to the output end of the sludge pump 16. A baffle 14 is fixedly installed on the inner bottom of the hull 1. It also includes a salvage assembly installed on the fixed frame 2. The salvage assembly is used to clean up the garbage in the river channel. A transport assembly is installed below the sludge discharge pipe 18. A pressing structure is set above the transport assembly. The transport assembly and the pressing structure are used to filter the water in the sludge. An adjustment unit is set between the hull 1 and the fixed frame 2. The adjustment unit is used to adjust the operating depth of the hull 1 in the river channel.

[0032] The salvage assembly includes transport rollers 9, salvage net belts 10, salvage net plates 11, and a first drive motor 12. There are two sets of transport rollers 9, both rotatably mounted on the inner walls of the front and rear sides of the fixed frame 2. The salvage net belts 10 are sleeved on the outer sides of the two sets of transport rollers 9. There are twelve sets of salvage net plates 11, and the twelve sets of salvage net plates 11 are fixedly mounted at equal intervals on the outer wall of the salvage net belts 10. The first drive motor 12 is fixedly mounted on the outer wall of the front side of the fixed frame 2. The output shaft of the first drive motor 12 is fixedly connected to one end of one set of transport rollers 9. When the first drive motor 12 is started, the output shaft of the first drive motor 12 drives the transport rollers 9 to rotate. The rotation of the transport rollers 9 drives the salvage net belts 10 and the salvage net plates 11 to rotate, so that the salvage net belts 10 and the salvage net plates 11 can salvage garbage from the bottom of the river and garbage in the river water. The salvaged garbage falls into the garbage collection bin of the hull 1 through the guide plate 13 for storage.

[0033] A guide plate 13 is fixedly installed on one side of the outer wall of the fixed frame 2, and the guide plate 13 is set at an angle.

[0034] The transport assembly includes a moving roller 19, a filter belt 20, and a second drive motor 21. Two sets of moving rollers 19 are rotatably mounted on the front and rear inner walls of the hull 1. The filter belt 20 is sleeved on the outer side of the two sets of moving rollers 19. The second drive motor 21 is fixedly mounted on the front outer wall of the hull 1. The output shaft of the second drive motor 21 is fixedly mounted to one end of one set of moving rollers 19. When the sludge pump 16 is started, the sludge pump 16 extracts sludge through the sludge extraction pipe 17. The sludge falls above the filter belt 20 through the discharge pipe 18. The filter belt 20 filters the water in the sludge. When the second drive motor 21 is started, the output shaft of the second drive motor 21 drives the moving rollers 19 to rotate. The rotation of the moving rollers 19 drives the filter belt 20 to move with the sludge. As the filter belt 20 moves with the sludge...

[0035] The pressing structure includes a pressure roller 22, a mounting frame 23, a movable rod 24, a push spring 25, and a connecting frame 26. The mounting frame 23 is fixedly installed on the top of the hull 1. The movable rod 24 is slidably installed on the top of the mounting frame 23. The push spring 25 is sleeved on the outside of the movable rod 24. The connecting frame 26 is fixedly installed on the bottom of the movable rod 24, and the push spring 25 is located between the mounting frame 23 and the connecting frame 26. The pressure roller 22 is rotatably installed on the front and rear inner walls of the connecting frame 26, and the bottom of the pressure roller 22 is in contact with the outside of the filter belt 20. As the filter belt 20 moves against the silt, the silt will enter between the filter belt 20 and the pressure roller 22, so that the pressure roller 22 and the filter belt 20 squeeze the silt, further removing the water from the silt. The dewatered silt is scraped into the silt collection chamber by a scraper, while the filtered water enters the river water collection chamber. Finally, the water re-enters the river through the outlet hole, which can greatly improve the water quality of the river.

[0036] The front and rear inner walls of the hull 1 are fixedly installed with silt-pushing plates 27. The silt-pushing plates 27 are located above the filter belt 20 and are used to flatten the silt, so as to facilitate the pressing structure to dewater the silt.

[0037] Scrapers are fixedly installed on the inner walls of the front and rear sides of the hull 1. The scrapers are located below the filter belt 20, and the top of the scrapers is in contact with the outer side of the filter belt 20, for scraping the silt on the filter belt 20.

[0038] The adjustment unit includes a second support plate, a connecting block 3, a guide rod 4, a servo motor 5, a first bevel gear 6, a threaded rod 7, and a second bevel gear 8. The second support plate is fixedly installed on one side of the outer wall of the fixed frame 2. Two sets of guide rods 4 are fixedly installed between one side of the outer wall of the fixed frame 2 and the second support plate. The servo motor 5 is fixedly installed on one side of the outer wall of the fixed frame 2. The first bevel gear 6 is fixedly installed on the output shaft of the servo motor 5. The threaded rod 7 is rotatably installed between one side of the outer wall of the fixed frame 2 and the second support plate. The second bevel gear 8 is fixedly installed on the outer wall of the threaded rod 7, and the second bevel gear 8 is aligned with the first bevel gear 6. Wheel 6 meshes with each other, connecting block 3 is fixedly installed on one side of hull 1, and connecting block 3 is slidably installed on the outer wall of two sets of guide rods 4. Connecting block 3 is threadedly installed on the outer wall of threaded rod 7. Servo motor 5 is started, and the output shaft of servo motor 5 drives the first bevel gear 6 to rotate. The rotation of the first bevel gear 6 drives the second bevel gear 8 and threaded rod 7 to rotate. The rotation of threaded rod 7 drives connecting block 3 to move on the outer wall of guide rod 4. Thus, the fixing frame 2 is raised and lowered relative to hull 1, adjusting the depth of fixing frame 2 in the river channel, which facilitates the cleaning of garbage at the bottom of the river channel and improves the cleaning effect of the river channel.

[0039] The U-shaped partition plate 15 and the scraper divide the interior of the hull 1 into three compartments, which are, from left to right, a garbage collection compartment, a river water collection compartment, and a silt collection compartment. Water outlets are provided on the front and rear sides of the hull 1, and the water outlets are located on the front and rear sides of the river water collection compartment.

[0040] A first support plate 28 is fixedly installed on the inner wall of the front and rear sides of the hull 1. The top of the first support plate 28 contacts the inner side of the filter belt 20 to support the filter belt 20 and prevent the filter belt 20 from bending.

[0041] Methods for dredging riverbed sediment include the following steps:

[0042] S1. Preparation: Start the electric propeller 29, which drives the device to move on the surface of the river; start the servo motor 5, whose output shaft drives the first bevel gear 6 to rotate, which in turn drives the second bevel gear 8 and the threaded rod 7 to rotate, which in turn drives the connecting block 3 to move on the outer wall of the guide rod 4, thereby raising and lowering the fixed frame 2 relative to the hull 1, adjusting the depth of the fixed frame 2 in the river, driving the salvage assembly to contact the riverbed garbage, and causing the sludge suction pipe 17 to contact the silt.

[0043] S2. Salvage: Start the first drive motor 12. The output shaft of the first drive motor 12 drives the transport roller 9 to rotate. The rotation of the transport roller 9 drives the salvage net belt 10 and the salvage net plate 11 to rotate, so that the salvage net belt 10 and the salvage net plate 11 can salvage the garbage at the bottom of the river and the garbage in the river water. The salvaged garbage falls into the garbage collection bin of the hull 1 through the guide plate 13 for storage.

[0044] S3. Dredging: Start the dredging pump 16. The dredging pump 16 extracts the sludge through the dredging pipe 17. The sludge falls into the water filter belt 20 through the discharge pipe 18.

[0045] S4. Water Removal: The water in the silt is filtered by the filter belt 20. The second drive motor 21 is started, and the output shaft of the second drive motor 21 drives the moving roller 19 to rotate. The rotation of the moving roller 19 drives the filter belt 20 and the silt to move. As the filter belt 20 moves the silt, the silt will enter between the filter belt 20 and the pressure roller 22, so that the pressure roller 22 and the filter belt 20 squeeze the silt to further remove the water in the silt. The dewatered silt is scraped into the silt collection bin by the scraper, while the filtered water will enter the river water collection bin. Finally, the filtered river water will re-enter the river channel through the water outlet.

[0046] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A riverbed sediment dredging device, comprising a hull (1), a fixed frame (2) provided on one side of the hull (1), an electric propeller (29) fixedly installed at the bottom of the hull (1), a U-shaped partition plate (15) fixedly installed on the inner wall of the hull (1), sludge pumps (16) fixedly installed on the inner walls of both sides of the U-shaped partition plate (15), a sludge suction pipe (17) fixedly installed on the front side of the hull (1) and the front side of the fixed frame (2), one end of the sludge suction pipe (17) extending to the inner side of the fixed frame (2), the other end of the sludge suction pipe (17) fixedly connected to the input end of the sludge pump (16), a sludge discharge pipe (18) fixedly installed on the top of the U-shaped partition plate (15), one end of the sludge discharge pipe (18) fixedly connected to the output end of the sludge pump (16), and a baffle (14) fixedly installed on the inner bottom of the hull (1), characterized in that, Also includes: The salvage assembly installed on the fixed frame (2) is used to clean up garbage in the river channel; The transport assembly installed below the sludge discharge pipe (18) has a pressing structure above it. The transport assembly and the pressing structure are used to filter water in the sludge. An adjustment unit is installed between the hull (1) and the fixed frame (2) to adjust the operating depth of the hull (1) in the river channel; The pressing structure includes a pressure roller (22), a mounting frame (23), a movable rod (24), a push spring (25), and a connecting frame (26). The mounting frame (23) is fixedly installed on the top of the hull (1). The movable rod (24) is slidably installed on the top of the mounting frame (23). The push spring (25) is sleeved on the outside of the movable rod (24). The connecting frame (26) is fixedly installed on the bottom end of the movable rod (24), and the push spring (25) is located between the mounting frame (23) and the connecting frame (26). The pressure roller (22) is rotatably installed on the front and rear inner walls of the connecting frame (26), and the bottom of the pressure roller (22) is in contact with the outside of the filter belt (20). The front and rear inner walls of the hull (1) are fixedly installed with silt-pushing plates (27), which are located above the filter belt (20). Scrapers are fixedly installed on the front and rear inner walls of the hull (1). The scrapers are located below the filter belt (20), and the top of the scrapers is in contact with the outer side of the filter belt (20). The U-shaped partition plate (15) and scraper divide the interior of the hull (1) into three compartments, which are divided into a garbage collection compartment, a river water collection compartment, and a silt collection compartment from left to right. Water outlets are provided on the front and rear sides of the hull (1), and the water outlets are located on the front and rear sides of the river water collection compartment. A first support plate (28) is fixedly installed on the inner wall of the front and rear sides of the hull (1), and the top of the first support plate (28) is in contact with the inner side of the filter belt (20).

2. The riverbed sediment dredging equipment according to claim 1, characterized in that: The salvage assembly includes a transport roller (9), a salvage net belt (10), a salvage net plate (11), and a first drive motor (12). The transport roller (9) has two sets, both of which are rotatably mounted on the front and rear inner walls of the fixed frame (2). The salvage net belt (10) is sleeved on the outer side of the two sets of transport rollers (9). There are twelve sets of salvage net plates (11), and the twelve sets of salvage net plates (11) are fixedly mounted at equal intervals on the outer wall of the salvage net belt (10). The first drive motor (12) is fixedly mounted on the front outer wall of the fixed frame (2), and the output shaft of the first drive motor (12) is fixedly connected to one end of one set of transport rollers (9).

3. The riverbed sediment dredging equipment according to claim 2, characterized in that: A guide plate (13) is fixedly installed on one side of the outer wall of the fixed frame (2), and the guide plate (13) is inclined.

4. The riverbed sediment dredging equipment according to claim 3, characterized in that: The transport assembly includes a moving roller (19), a filter belt (20), and a second drive motor (21). The moving roller (19) has two sets, both of which are rotatably mounted on the front and rear inner walls of the hull (1). The filter belt (20) is sleeved on the outer side of the two sets of moving rollers (19). The second drive motor (21) is fixedly mounted on the front outer wall of the hull (1). The output shaft of the second drive motor (21) is fixedly mounted to one end of one set of moving rollers (19).

5. The riverbed sediment dredging equipment according to claim 4, characterized in that: The adjustment unit includes a second support plate, a connecting block (3), a guide rod (4), a servo motor (5), a first bevel gear (6), a threaded rod (7), and a second bevel gear (8). The second support plate is fixedly installed on one side of the outer wall of the fixed frame (2). Two sets of guide rods (4) are fixedly installed between one side of the outer wall of the fixed frame (2) and the second support plate. The servo motor (5) is fixedly installed on one side of the outer wall of the fixed frame (2). The first bevel gear (6) is fixedly installed on the output shaft of the servo motor (5). The threaded rod (7) is rotatably installed between one side of the outer wall of the fixed frame (2) and the second support plate. The second bevel gear (8) is fixedly installed on the outer wall of the threaded rod (7) and meshes with the first bevel gear (6). The connecting block (3) is fixedly installed on one side of the hull (1) and slides on the outer wall of the two sets of guide rods (4). The connecting block (3) is threadedly installed on the outer wall of the threaded rod (7).

6. The dredging method of the riverbed sediment dredging equipment according to claim 5, characterized in that: Includes the following steps: S1, Preparation: Start the electric propeller (29), the electric propeller (29) drives the device to move, so that the device can move on the water surface of the river; start the servo motor (5), the output shaft of the servo motor (5) drives the first bevel gear (6) to rotate, the rotation of the first bevel gear (6) drives the second bevel gear (8) and the threaded rod (7) to rotate, the rotation of the threaded rod (7) drives the connecting block (3) to move on the outer wall of the guide rod (4), and then the fixed frame (2) is raised and lowered relative to the hull (1), the depth of the fixed frame (2) in the river is adjusted, so that the salvage component comes into contact with the garbage on the riverbed, and the sludge suction pipe (17) comes into contact with the silt; S2, Salvage: Start the first drive motor (12), the output shaft of the first drive motor (12) drives the transport roller (9) to rotate, the rotation of the transport roller (9) drives the salvage net belt (10) and salvage net plate (11) to rotate, so that the salvage net belt (10) and salvage net plate (11) can salvage the garbage at the bottom of the river and the garbage in the river water. The salvaged garbage falls into the garbage collection bin of the hull (1) through the guide plate (13) for storage. S3, dredging: Start the dredging pump (16), the dredging pump (16) extracts the sludge through the dredging pipe (17), and the sludge falls into the filter belt (20) through the discharge pipe (18); S4. Dewatering: The water in the silt is filtered by the filter belt (20). The second drive motor (21) is started. The output shaft of the second drive motor (21) drives the moving roller (19) to rotate. The rotation of the moving roller (19) drives the filter belt (20) and the silt to move. As the filter belt (20) moves the silt, the silt will enter between the filter belt (20) and the pressure roller (22), so that the pressure roller (22) and the filter belt (20) squeeze the silt to further remove the water in the silt. The dewatered silt is scraped into the silt collection bin by the scraper, while the filtered water will enter the river water collection bin. Finally, the filtered river water will re-enter the river channel through the water outlet.

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