A high-efficiency dredging overflow device for large trailing suction hopper dredgers

Abstract

This invention discloses a high-efficiency dredging overflow device for a large trailing suction hopper dredger, belonging to the technical field of trailing suction hopper dredgers. The device includes a mounting plate with a hydraulic cylinder fixed to it. A sludge discharge cylinder is connected to the bottom of the hydraulic cylinder, and a sludge discharge pipe is fixed to the bottom of the sludge discharge cylinder. An overflow cylinder is installed inside the sludge discharge cylinder. An inlet and an outlet are respectively opened at the top and bottom of the overflow cylinder. A bucket-shaped filter plate is installed inside the overflow cylinder. A sludge discharge trough communicating with the sludge discharge cylinder is opened on the upper side of the bucket-shaped filter plate. A retraction and deployment assembly for driving the bucket-shaped filter plate to rise and fall is installed inside the overflow cylinder. An elastic guide plate connected to the retraction and deployment assembly is also connected to the outside of the overflow cylinder. This invention enables non-stop maintenance and cleaning of the overflow device, ensuring continuous separation of mud and water, improving water overflow efficiency, reducing mud and sand loss at the overflow point, and effectively improving the loading efficiency of the mud tank.

Description

Technical Field

[0001] This invention relates to the field of trailing suction hopper dredger technology, and more particularly to a high-efficiency dredging overflow device for a large trailing suction hopper dredger. Background Technology

[0002] Trailing suction hopper dredgers are commonly used equipment for dredging operations. Equipped with a skid head and hydraulic suction system, they excavate and transport silt, gravel, and other materials from the riverbed or seabed into the dredger's hold. This silt and gravel are then transported to suitable locations, thereby clearing waterways, widening riverbeds, and improving navigation capacity. During dredging operations, centrifugal pumps draw silt from the seabed into the silt tank for sedimentation. A low-concentration silt mixture is then discharged through an overflow pipe, increasing the silt concentration within the tank and maximizing the vessel's loading capacity.

[0003] During the loading process, the settling of the mud is crucial. In the past, due to the high velocity of the mud entering the hold, the settling was minimal. During overflow, a large amount of mud and sand was carried away by the water through the overflow pipe, resulting in low loading efficiency. Although adding filters can filter and intercept the mud and sand, as the overflow continues, excessive mud and sand accumulate on the filters, hindering the water's passage through the filters and thus reducing the overflow speed, affecting the ship's real-time loading efficiency. Furthermore, cleaning the mud and sand from the filters still requires staff to stop the machine and remove the filters, which is inconvenient, further slowing the overflow process and increasing the workload and difficulty for the staff. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing a high-efficiency dredging overflow device for large trailing suction hopper dredgers.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-efficiency dredging overflow device for a large trailing suction hopper includes a mounting plate, on which a hydraulic cylinder is fixedly mounted. The bottom end of the hydraulic cylinder is connected to a sludge discharge cylinder, and the bottom end of the sludge discharge cylinder is fixedly mounted with a sludge discharge pipe. An overflow cylinder is installed inside the sludge discharge cylinder. The top and bottom of the overflow cylinder are respectively provided with a feed inlet and a liquid outlet. An inverted bucket-shaped filter plate is installed inside the overflow cylinder. A sludge discharge trough communicating with the sludge discharge cylinder is opened on the upper side of the bucket-shaped filter plate. A take-up and release assembly for driving the bucket-shaped filter plate to rise and fall is installed inside the overflow cylinder. An elastic guide plate connected to the take-up and release assembly is also connected to the outside of the overflow cylinder.

[0007] Preferably, the take-up and release assembly includes a drive motor fixed to the top of the overflow cylinder. The output shaft of the drive motor passes through the overflow cylinder and is connected to a rotating shaft that rotates inside the overflow cylinder. A first bevel gear is provided on the rotating shaft. A rotating rod is rotatably connected to the overflow cylinder. One end of the rotating rod is connected to a second bevel gear that meshes with the first bevel gear. A first drum and a second drum are provided on the rotating rod. A first pull rope is wound around the first drum. The end of the first pull rope away from the first drum is connected to a funnel-shaped filter plate. A second pull rope is wound around the second drum. The end of the second pull rope away from the second drum is connected to an elastic guide plate.

[0008] Preferably, the first bevel gear is configured as an incomplete bevel gear, and the first bevel gear meshes intermittently with the second bevel gear.

[0009] Preferably, a support plate is fixedly provided on the inner wall of the overflow cylinder, the support plate is rotatably connected to the rotating shaft, and an elastic element with both ends connected to the support plate and the bucket-shaped filter plate respectively is sleeved on the outer side of the rotating shaft.

[0010] Preferably, the overflow cylinder includes an upper cylinder body fixedly connected to the upper end of the sludge discharge cylinder, a lower cylinder body fixedly connected to the lower end of the sludge discharge cylinder, and a middle cylinder body rotatably connected to the top of the lower cylinder body. The sludge discharge trough is disposed between the middle cylinder body and the upper cylinder body. A connecting rod is fixedly provided on the inner wall of the sludge discharge trough. A filter screen cylinder rotatably connected to the middle cylinder body is connected to the bottom of the connecting rod. The elastic guide plate is fixedly disposed at the bottom end of the filter screen cylinder.

[0011] Preferably, the support plate includes a plate body and a rotating ring rotatably connected to the plate body, the end of the elastic element away from the bucket-shaped filter plate is fixedly connected to the rotating ring, and the bucket-shaped filter plate is slidably connected to the upper cylinder through a sliding rod.

[0012] Preferably, the outer wall of the middle cylinder is fixedly provided with spiral conveying blades, the middle cylinder is connected to the rotating shaft through a support rod, and the inner wall of the upper cylinder is fixedly provided with a tapered guide pipe.

[0013] Preferably, an L-shaped plate is fixedly provided at the bottom of the mounting plate, a rotating rod is rotatably connected to the L-shaped plate, a third drum is provided on the rotating rod, a third pull rope is wound and connected to the third drum, the end of the third pull rope away from the third drum is fixedly connected to the top of the sludge discharge cylinder, and an elastic telescopic rod is provided between the top of the sludge discharge cylinder and the bottom of the hydraulic cylinder.

[0014] Preferably, a telescopic tube is rotatably connected to the L-shaped plate, a side plate is fixed to the side of the overflow cylinder and rotatably connected to the bottom end of the telescopic tube, a fifth bevel gear and a fourth bevel gear are respectively provided at the upper and lower ends of the telescopic tube, a sixth bevel gear meshing with the fifth bevel gear is provided on the rotating rod, and a third bevel gear meshing with the fourth bevel gear is connected to the end of the rotating rod away from the second bevel gear.

[0015] Preferably, the mounting plate has threaded holes, and bolts are movably connected in the threaded holes. The mounting plate is installed in the mud chamber by the bolts.

[0016] Compared with the prior art, the present invention provides a high-efficiency dredging overflow device for large trailing suction hopper dredgers, which has the following beneficial effects:

[0017] 1. The large trailing suction hopper vessel's high-efficiency dredging overflow device uses a retractable assembly to repeatedly pull the bucket-shaped filter plate and elastic guide vanes, allowing the sediment intercepted on the bucket-shaped filter plate to be continuously discharged through the discharge pipe at the bottom of the discharge cylinder. This enables non-stop maintenance and cleaning of the overflow device, ensuring that the overflow device always separates mud and water, improving water overflow efficiency, reducing sediment loss at the overflow point, and effectively improving the loading efficiency of the mud tank.

[0018] 2. The high-efficiency dredging overflow device of this large trailing suction hopper vessel, when the mud-water separation is being carried out by the operation of the launching and recovering components, pulls the mud discharge cylinder upwards with the third rope, thereby causing the mud discharge cylinder to move upwards along with the overflow cylinder. This reduces the amount of mud and water mixed in from the feed inlet of the overflow cylinder. When the bucket-shaped filter plate is raised, the gap between the bucket-shaped filter plate and the mud discharge trough becomes smaller, which reduces the time for water to pass through the bucket-shaped filter plate. This results in too much water not having enough time to pass through the bucket-shaped filter plate and being discharged back into the mud chamber with the mud and sand from the mud discharge trough, affecting the mud-water separation effect. This results in the mud and sand discharged from the mud discharge pipe having a high water content, reducing the overflow efficiency and overflow effect of the mud chamber. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 For the present invention Figure 1 A partially enlarged structural diagram of section A in the middle;

[0021] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0022] Figure 4 For the present invention Figure 3 A partially enlarged structural diagram of section B in the middle;

[0023] Figure 5 This is a schematic diagram of the structure of the bucket-shaped filter plate of the present invention when it is raised.

[0024] Figure 6 For the present invention Figure 5 A partially enlarged structural diagram of section C in the middle;

[0025] Figure 7 This is a cross-sectional structural diagram of the funnel-shaped filter plate of the present invention.

[0026] In the diagram: 1. Mounting plate; 2. Hydraulic cylinder; 3. Sludge discharge cylinder; 301. Sludge discharge pipe; 4. Overflow cylinder; 401. Feed inlet; 402. Liquid outlet; 403. Upper cylinder; 4031. Conical guide pipe; 404. Lower cylinder; 405. Middle cylinder; 4051. Spiral conveyor blades; 5. Bucket-shaped filter plate; 6. Sludge discharge trough; 601. Connecting rod; 602. Filter screen cylinder; 7. Elastic guide vane; 8. Drive motor; 801. Rotating shaft; 8011. First bevel gear; 9. Rotating rod; 901. Second bevel gear. Gear; 902, First drum; 9021, First pull rope; 903, Second drum; 9031, Second pull rope; 904, Third bevel gear; 10, Support plate; 1001, Plate body; 1002, Rotating ring; 1003, Elastic element; 11, L-shaped plate; 111, Rotating rod; 112, Third drum; 113, Third pull rope; 114, Elastic telescopic rod; 12, Telescopic tube; 121, Fourth bevel gear; 122, Fifth bevel gear; 13, Sixth bevel gear; 14, Side plate; 15, Threaded hole. Detailed Implementation

[0027] 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.

[0028] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] Example: Refer to Figure 1-7A high-efficiency dredging overflow device for a large trailing suction hopper includes a mounting plate 1, a hydraulic cylinder 2 fixed on the mounting plate 1, a sludge discharge cylinder 3 connected to the bottom end of the hydraulic cylinder 2, a sludge discharge pipe 301 fixed to the bottom end of the sludge discharge cylinder 3, an overflow cylinder 4 inside the sludge discharge cylinder 3, an inlet 401 and an outlet 402 respectively opened at the top and bottom of the overflow cylinder 4, an inverted bucket-shaped filter plate 5 inside the overflow cylinder 4, a sludge discharge trough 6 connected to the sludge discharge cylinder 3 on the upper side of the overflow cylinder 4 above the bucket-shaped filter plate 5, a take-up and release assembly for driving the bucket-shaped filter plate 5 to rise and fall inside the overflow cylinder 4, and an elastic guide plate 7 connected to the take-up and release assembly connected to the outside of the overflow cylinder 4.

[0031] Furthermore, the mounting plate 1 has a threaded hole 15, and a bolt is movably connected in the threaded hole 15. The mounting plate 1 is installed in the mud chamber by the bolt.

[0032] Specifically, the mounting plate 1 is bolted into the mud chamber. Then, the hydraulic cylinder 2 is controlled to operate, so that the output end of the hydraulic cylinder 2 drives the overflow cylinder 4 to move through the mud discharge cylinder 3. This causes the feed inlet 401 of the overflow cylinder 4 to be lower than the water level in the mud chamber, allowing mud and water to enter the overflow cylinder 4 from the feed inlet 401. The mud and water are filtered and separated by the bucket-shaped filter plate 5. The separated water is discharged from the liquid outlet 402 at the bottom of the overflow cylinder 4, and the separated mud and sand are discharged into the mud chamber from the mud discharge pipe 301 of the mud discharge cylinder 3. This application uses the retraction and extension assembly to reciprocate the bucket-shaped filter plate 5 and the elastic guide plate 7, so that the mud and sand intercepted on the bucket-shaped filter plate 5 are continuously discharged through the mud discharge pipe 301 at the bottom of the mud discharge cylinder 3. This achieves non-stop maintenance and cleaning of the overflow device, ensuring that the overflow device always separates mud and water, improving the water overflow efficiency, reducing mud and sand loss at the overflow point, and effectively improving the loading efficiency of the mud chamber.

[0033] Reference Figure 1-7 As a preferred technical solution of the present invention, the receiving and discharging assembly includes a drive motor 8 fixedly mounted on the top of the overflow cylinder 4. The output shaft of the drive motor 8 passes through the overflow cylinder 4 and is connected to a rotating shaft 801 that rotates inside the overflow cylinder 4. A first bevel gear 8011 is provided on the rotating shaft 801. A rotating rod 9 is rotatably connected to the overflow cylinder 4. One end of the rotating rod 9 is connected to a second bevel gear 901 that meshes with the first bevel gear 8011. A first drum 902 and a second drum 903 are provided on the rotating rod 9. A first pull rope 9021 is wound and connected to the first drum 902. The end of the first pull rope 9021 away from the first drum 902 is connected to the bucket-shaped filter plate 5. A second pull rope 9031 is wound and connected to the second drum 903. The end of the second pull rope 9031 away from the second drum 903 is connected to the elastic guide plate 7.

[0034] Furthermore, the first bevel gear 8011 is configured as an incomplete bevel gear, and the first bevel gear 8011 meshes intermittently with the second bevel gear 901.

[0035] Furthermore, a support plate 10 is fixedly provided on the inner wall of the overflow cylinder 4. The support plate 10 is rotatably connected to the rotating shaft 801. An elastic element 1003 is sleeved on the outer side of the rotating shaft 801, with its two ends connected to the support plate 10 and the bucket-shaped filter plate 5 respectively.

[0036] Furthermore, the overflow cylinder 4 includes an upper cylinder 403 fixedly connected to the upper end of the sludge discharge cylinder 3, a lower cylinder 404 fixedly connected to the lower end of the sludge discharge cylinder 3, and a middle cylinder 405 rotatably connected to the top of the lower cylinder 404. The sludge discharge trough 6 is disposed between the middle cylinder 405 and the upper cylinder 403. A connecting rod 601 is fixedly provided on the inner wall of the sludge discharge trough 6. The bottom of the connecting rod 601 is connected to a filter screen cylinder 602 rotatably connected to the middle cylinder 405. An elastic guide plate 7 is fixedly disposed at the bottom end of the filter screen cylinder 602.

[0037] Specifically, when the loading and unloading assembly is working, the drive motor 8 is controlled to run, causing the output shaft of the drive motor 8 to drive the rotating shaft 801 to rotate. When the rotating shaft 801 rotates, the outer incomplete bevel gear intermittently meshes with the second bevel gear 901 on the rotating rod 9. When the first bevel gear 8011 and the second bevel gear 901 are meshing and transmitting power, the first drum 902 on the rotating rod 9 winds up the first pull rope 9021, and the second drum 903 winds up the second pull rope 9031, causing the bucket-shaped filter plate 5 to move upward in the overflow cylinder 4. The elastic guide plate 7 flips upward with the connection point with the overflow cylinder 4 as the center. As the bucket-shaped filter plate 5 continues to move upward until it moves to the sludge discharge trough 6, the sludge intercepted by the bucket-shaped filter plate 5 automatically slides down the curved surface of the bucket-shaped filter plate 5 and passes through the sludge discharge trough 6 into the inverted cone-shaped temporary sludge storage area formed by the flipping and enclosing of the elastic guide plate 7, effectively... To prevent water from entering the sludge discharge cylinder 3 along the downward-sloping elastic guide plate 7, and to prevent excess water from entering the upper side of the elastic guide plate 7 from flowing back into the middle cylinder 405 through the filter screen cylinder 602, when the first bevel gear 8011 no longer meshes with the second bevel gear 901, the elastic element 1003 and the elastic guide plate 7 reset. The bucket-shaped filter plate 5 resets and moves downward in the overflow cylinder 4 to continue its mud-water separation work. When the end of the reset and flipped elastic guide plate 7 away from the filter screen cylinder 602 is lower than the end connected to the filter screen cylinder 602, the elastic guide plate 7 tilts downward, and the mud and sand on the elastic guide plate 7 will automatically fall into the sludge discharge cylinder 3. This achieves non-stop maintenance and cleaning of the overflow device, ensures that the overflow device always separates mud and water, improves the water overflow efficiency, reduces mud and sand loss at the overflow point, and effectively improves the loading efficiency of the mud tank.

[0038] Reference Figure 1-7 As a preferred technical solution of the present invention, the support plate 10 includes a plate body 1001 and a rotating ring 1002 rotatably connected to the plate body 1001. The end of the elastic element 1003 away from the bucket-shaped filter plate 5 is fixedly connected to the rotating ring 1002. The bucket-shaped filter plate 5 is slidably connected to the upper cylinder 403 through a sliding rod.

[0039] Furthermore, a spiral conveying blade 4051 is fixedly provided on the outer wall of the middle cylinder 405, the middle cylinder 405 is connected to the rotating shaft 801 through a support rod, and a tapered guide pipe 4031 is fixedly provided on the inner wall of the upper cylinder 403.

[0040] Specifically, when the rotating shaft 801 rotates, it drives the middle cylinder 405 to rotate relative to the filter screen cylinder 602 and the lower cylinder 404 through the support rod. When the middle cylinder 405 rotates, it drives the spiral conveying blades 4051 to rotate, so that the spiral conveying blades 4051 transport the mud and sand entering the mud discharge cylinder 3, so as to avoid the mud and sand from accumulating and clogging in the mud discharge cylinder 3 and the mud discharge pipe 301, which would affect the normal operation of the overflow device. When the bucket-shaped filter plate 5 moves upward with the first pull rope 9021, it drives the sliding rod to slide with the upper cylinder 403, thereby guiding the movement direction of the bucket-shaped filter plate 5. The conical guide pipe 4031 can guide the mud and water falling from the upper cylinder 403 to the bucket-shaped filter plate 5, preventing the falling mud and water from directly entering the mud discharge trough 6.

[0041] Reference Figure 1-7 As a preferred technical solution of the present invention, an L-shaped plate 11 is fixedly provided at the bottom of the mounting plate 1, a rotating rod 111 is rotatably connected to the L-shaped plate 11, a third drum 112 is provided on the rotating rod 111, a third pull rope 113 is wound and connected to the third drum 112, one end of the third pull rope 113 away from the third drum 112 is fixedly connected to the top of the mud discharge cylinder 3, and an elastic telescopic rod 114 is provided between the top of the mud discharge cylinder 3 and the bottom of the hydraulic cylinder 2.

[0042] Furthermore, a telescopic tube 12 is rotatably connected to the L-shaped plate 11, and a side plate 14 is fixed to the side of the overflow cylinder 4 and rotatably connected to the bottom end of the telescopic tube 12. The upper and lower ends of the telescopic tube 12 are respectively provided with a fifth bevel gear 122 and a fourth bevel gear 121. A sixth bevel gear 13 that meshes with the fifth bevel gear 122 is provided on the rotating rod 111, and a third bevel gear 904 that meshes with the fourth bevel gear 121 is connected to the end of the rotating rod 9 away from the second bevel gear 901.

[0043] Specifically, when the retraction assembly is working, the rotation of the rotating rod 9 causes the third bevel gear 904 at its end to mesh with the fourth bevel gear 121 at the lower end of the telescopic tube 12. The fourth bevel gear 121 drives the telescopic tube 12 and the fifth bevel gear 122 at its upper end to mesh. The fifth bevel gear 122 meshes with the sixth bevel gear 13 on the rotating rod 111, causing the sixth bevel gear 13 to drive the rotating rod 111 and the sixth bevel gear 13 on the rotating rod 111 to mesh, causing the third drum 112 on the rotating rod 111 to retract the third pull rope 113. The third pull rope 113 pulls the mud discharge cylinder 3 upward, which in turn causes the mud discharge cylinder 3 to move the overflow cylinder 4 upward. This reduces the amount of mud and water mixed in from the feed inlet 401 of the overflow cylinder 4. When the bucket-shaped filter plate 5 is raised, the gap between the bucket-shaped filter plate 5 and the mud discharge trough 6 becomes smaller, and the time for a large amount of water to pass through the bucket-shaped filter plate 5 is reduced. As a result, too much water cannot pass through the bucket-shaped filter plate 5 in time and is discharged back into the mud chamber with the mud and sand from the mud discharge trough 6, which affects the mud-water separation effect. This results in the mud and sand discharged from the mud discharge pipe 301 having a high water content, reducing the overflow efficiency and overflow effect of the mud chamber.

[0044] The above description is only a preferred embodiment of the present invention, but 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 inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-efficiency dredging overflow device for a large trailing suction hopper dredger, comprising a mounting plate (1), characterized in that, A hydraulic cylinder (2) is fixed on the mounting plate (1). A mud discharge cylinder (3) is connected to the bottom end of the hydraulic cylinder (2). A mud discharge pipe (301) is fixed to the bottom end of the mud discharge cylinder (3). An overflow cylinder (4) is provided inside the mud discharge cylinder (3). An inlet (401) and an outlet (402) are respectively opened at the top and bottom of the overflow cylinder (4). An inverted bucket-shaped filter plate (5) is provided inside the overflow cylinder (4). A mud discharge trough (6) communicating with the mud discharge cylinder (3) is opened on the upper side of the bucket-shaped filter plate (5). A take-up and release assembly for driving the bucket-shaped filter plate (5) to rise and fall is provided inside the overflow cylinder (4). An elastic guide plate (7) connected to the take-up and release assembly is also connected to the outside of the overflow cylinder (4). The overflow cylinder (4) includes an upper cylinder (403) fixedly connected to the upper end of the sludge discharge cylinder (3), a lower cylinder (404) fixedly connected to the lower end of the sludge discharge cylinder (3), and a middle cylinder (405) rotatably connected to the top of the lower cylinder (404). The sludge discharge trough (6) is disposed between the middle cylinder (405) and the upper cylinder (403). A connecting rod (601) is fixedly provided on the inner wall of the sludge discharge trough (6). A filter screen cylinder (602) rotatably connected to the middle cylinder (405) is connected to the bottom of the connecting rod (601). The elastic guide plate (7) is fixedly disposed at the bottom end of the filter screen cylinder (602).

2. The high-efficiency dredging overflow device for a large trailing suction hopper dredger according to claim 1, characterized in that, The receiving and discharging assembly includes a drive motor (8) fixed to the top of the overflow cylinder (4). The output shaft of the drive motor (8) passes through the overflow cylinder (4) and is connected to a rotating shaft (801) that rotates inside the overflow cylinder (4). A first bevel gear (8011) is provided on the rotating shaft (801). A rotating rod (9) is rotatably connected to the overflow cylinder (4). One end of the rotating rod (9) is connected to a second bevel gear (901) that meshes with the first bevel gear (8011). The rotating rod (9) is provided with a first drum (902) and a second drum (903). A first pull rope (9021) is wound and connected to the first drum (902). The end of the first pull rope (9021) away from the first drum (902) is connected to the bucket-shaped filter plate (5). A second pull rope (9031) is wound and connected to the second drum (903). The end of the second pull rope (9031) away from the second drum (903) is connected to the elastic guide plate (7).

3. The high-efficiency dredging overflow device for a large trailing suction hopper dredger according to claim 2, characterized in that, The first bevel gear (8011) is configured as an incomplete bevel gear, and the first bevel gear (8011) meshes intermittently with the second bevel gear (901).

4. A high-efficiency dredging overflow device for a large trailing suction hopper dredger according to claim 2, characterized in that, The inner wall of the overflow cylinder (4) is fixed with a support plate (10), the support plate (10) is rotatably connected to the rotating shaft (801), and the outer side of the rotating shaft (801) is fitted with an elastic element (1003) whose two ends are respectively connected to the support plate (10) and the bucket-shaped filter plate (5).

5. A high-efficiency dredging overflow device for a large trailing suction hopper dredger according to claim 4, characterized in that, The support plate (10) includes a plate body (1001) and a rotating ring (1002) rotatably connected to the plate body (1001). The end of the elastic element (1003) away from the bucket-shaped filter plate (5) is fixedly connected to the rotating ring (1002). The bucket-shaped filter plate (5) is slidably connected to the upper cylinder (403) through a sliding rod.

6. A high-efficiency dredging overflow device for a large trailing suction hopper dredger according to claim 5, characterized in that, The outer wall of the middle cylinder (405) is fixed with a spiral conveying blade (4051), the middle cylinder (405) is connected to the rotating shaft (801) through a support rod, and the inner wall of the upper cylinder (403) is fixed with a tapered guide pipe (4031).

7. A high-efficiency dredging overflow device for a large trailing suction hopper dredger according to claim 3, characterized in that, An L-shaped plate (11) is fixedly provided at the bottom of the mounting plate (1). A rotating rod (111) is rotatably connected to the L-shaped plate (11). A third drum (112) is provided on the rotating rod (111). A third pull rope (113) is wound and connected to the third drum (112). The end of the third pull rope (113) away from the third drum (112) is fixedly connected to the top of the mud discharge cylinder (3). An elastic telescopic rod (114) is provided between the top of the mud discharge cylinder (3) and the bottom of the hydraulic cylinder (2).

8. A high-efficiency dredging overflow device for a large trailing suction hopper dredger according to claim 7, characterized in that, The L-shaped plate (11) is rotatably connected to a telescopic tube (12). The side of the overflow cylinder (4) is fixed with a side plate (14) that is rotatably connected to the bottom end of the telescopic tube (12). The upper and lower ends of the telescopic tube (12) are respectively provided with a fifth bevel gear (122) and a fourth bevel gear (121). The rotating rod (111) is provided with a sixth bevel gear (13) that meshes with the fifth bevel gear (122). The end of the rotating rod (9) away from the second bevel gear (901) is connected to a third bevel gear (904) that meshes with the fourth bevel gear (121).

9. A high-efficiency dredging overflow device for a large trailing suction hopper dredger according to claim 1, characterized in that, The mounting plate (1) has a threaded hole (15) and a bolt is movably connected in the threaded hole (15). The mounting plate (1) is installed in the mud chamber by the bolt.

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