Efficient dredging overflow device of large trailing suction dredger

Abstract

The invention discloses an efficient dredging overflow device of a large trailing suction dredger, and belongs to the technical field of trailing suction dredgers. An efficient dredging overflow device of a large trailing suction dredger comprises a mounting plate, a hydraulic cylinder is fixedly arranged on the mounting plate, the bottom end of the hydraulic cylinder is connected with a sludge discharging barrel, a sludge discharging pipe is fixedly arranged at the bottom end of the sludge discharging barrel, an overflow barrel is arranged in the sludge discharging barrel, a feeding port and a liquid outlet are formed in the top and the bottom of the overflow barrel respectively, and a hopper-shaped filter plate is arranged in the overflow barrel. The overflow cylinder is arranged on the upper side of the hopper-shaped filter plate and is provided with a sludge discharge groove communicated with the sludge discharge cylinder, a retractable assembly used for driving the hopper-shaped filter plate to lift is arranged in the overflow cylinder, and the outer side of the overflow cylinder is further connected with an elastic flow deflector connected with the retractable assembly; the non-stop maintenance and cleaning of the overflow device can be realized, the overflow device is ensured to always separate mud from water, the water overflow efficiency is improved, the silt loss at the overflow part is reduced, and the loading efficiency of the mud cabin is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of trailing suction hopper vessels, in particular to a high-efficiency dredging overflow device for a large trailing suction hopper vessel. Background Art

[0002] Trailing suction hopper dredger is a common equipment used for dredging construction. Its drag head and hydraulic mud suction device can dig and transport mud, gravel and other materials from the riverbed or seabed into the cabin, and then move these mud, gravel and gravel to a suitable place, thereby cleaning the river channel, widening the riverbed and improving the river's navigation capacity. During the construction of the trailing suction hopper dredger, a centrifugal pump is used to suck up mud and sand from the seabed, which enters the mud cabin for sedimentation, and the low-concentration mud and sand mixture is discharged through the overflow cylinder, thereby increasing the mud and sand concentration in the cabin and meeting the ship's loading capacity to the greatest extent.

[0003] During the loading process, the sedimentation of mud is very critical. In the previous loading process, the mud had a high speed when entering the cabin, resulting in less sedimentation. During the overflow process, a large amount of mud and sand were left in the overflow tube with the water, resulting in low loading efficiency. Although the mud and sand can be filtered and intercepted by adding a filter, as the overflow continues, too much mud and sand accumulate on the filter, hindering the speed of water passing through the filter, thereby reducing the overflow speed and affecting the real-time loading effect of the ship; and when removing the mud and sand on the filter, the staff still needs to stop the machine and remove the filter for cleaning, which is inconvenient to operate, further slowing down the overflow progress, and increasing the workload and difficulty of the staff. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and to propose a high-efficiency dredging overflow device for a large-scale trailing suction hopper vessel.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A high-efficiency dredging overflow device for a large-scale trailing suction hopper ship comprises a mounting plate, a hydraulic cylinder is fixedly arranged on the mounting plate, a mud discharge cylinder is connected to the bottom end of the hydraulic cylinder, a mud discharge pipe is fixedly arranged at the bottom end of the mud discharge cylinder, an overflow cylinder is arranged in the mud discharge cylinder, a feed inlet and a liquid outlet are respectively provided at the top and bottom of the overflow cylinder, a bucket-shaped filter plate is arranged in the overflow cylinder, a mud discharge groove connected to the mud discharge cylinder is arranged on the upper side of the bucket-shaped filter plate, a retracting and releasing assembly for driving the bucket-shaped filter plate to be lifted and lowered is arranged in the overflow cylinder, and an elastic guide plate connected to the retracting and releasing assembly is also connected to the outside of the overflow cylinder.

[0007] Preferably, the retractable assembly includes a driving motor fixedly mounted on the top of the overflow cylinder, the output shaft of the driving motor passes through the overflow cylinder and is connected to a rotating shaft rotating in the overflow cylinder, a first bevel gear is arranged 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 meshing with the first bevel gear, a first drum and a second drum are arranged on the rotating rod, a first pull rope is wound around the first drum and connected, an end of the first pull rope away from the first drum is connected to a bucket-shaped filter plate, a second pull rope is wound around the second drum and connected, an 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 is intermittently meshed with the second bevel gear.

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

[0010] Preferably, the overflow cylinder includes an upper cylinder fixedly connected to the upper end of the mud discharge cylinder, a lower cylinder fixedly connected to the lower end of the mud discharge cylinder, and a middle cylinder rotatably connected to the top of the lower cylinder, the mud discharge groove is arranged between the middle cylinder and the upper cylinder, a connecting rod is fixedly provided on the inner wall of the mud discharge groove, the bottom of the connecting rod is connected to a filter mesh cylinder rotatably connected to the middle cylinder, and the elastic guide plate is fixedly provided at the bottom end of the filter mesh cylinder.

[0011] Preferably, the support plate includes a plate body and a rotating ring rotatably connected to the plate body, one 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, a spiral conveying blade is fixedly provided on the outer wall of the middle cylinder, the middle cylinder is connected to the rotating shaft through a support rod, and a conical guide tube is fixedly provided on the inner wall of the upper cylinder.

[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 reel is provided on the rotating rod, a third pull rope is wound around the third reel and connected, one end of the third pull rope away from the third reel is fixedly connected to the top of the mud discharge cylinder, and an elastic telescopic rod is provided between the top of the mud 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 rotatably connected to the bottom end of the telescopic tube is fixedly provided on the side of the overflow 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, a threaded hole is provided on the mounting plate, a bolt is movably connected in the threaded hole, and the mounting plate is mounted in the mud cabin by the bolt.

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

[0017] 1. The large-scale trailing suction dredger has an efficient dredging overflow device. The bucket filter plate and the elastic guide plate are reciprocated by retracting and extending the assembly, so that the silt intercepted on the bucket filter plate is continuously discharged through the sludge discharge pipe at the bottom of the sludge discharge cylinder, realizing non-stop maintenance and cleaning of the overflow device, ensuring that the overflow device always separates mud and water, improving the overflow efficiency of the water body, reducing the loss of silt at the overflow, and effectively improving the loading efficiency of the mud tank.

[0018] 2. The large-scale trailing suction dredger has an efficient dredging overflow device. When the retracting and releasing components are working to separate mud and water, the third pull rope pulls up the mud discharge cylinder, thereby causing the mud discharge cylinder to drive the overflow cylinder to move upward, thereby reducing the amount of mud and water mixed in from the feed port of the overflow cylinder, and avoiding the gap between the bucket filter plate and the mud discharge trough to become smaller when the bucket filter plate is lifted up, thereby reducing the time for water to pass through the bucket filter plate, so that too much water does not have time to pass through the bucket filter plate and is discharged from the mud discharge trough to the mud chamber again along with the mud, affecting the mud and water separation effect, making the mud discharged from the mud discharge pipe have a high water content, and reducing the overflow efficiency and overflow effect of the mud chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 For the present invention Figure 1 A partial enlarged structural diagram of the middle part;

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention;

[0022] Figure 4 For the present invention Figure 3 A schematic diagram of the partially enlarged structure of the middle B part;

[0023] Figure 5 The schematic diagram of the structure of the bucket-shaped filter plate of the present invention when it is lifted

[0024] Figure 6 For the present invention Figure 5 A schematic diagram of the partially enlarged structure of the middle C part;

[0025] Figure 7 It is a schematic diagram of the cross-sectional structure of the bucket-shaped filter plate of the present invention.

[0026] In the figure: 1, mounting plate; 2, hydraulic cylinder; 3, mud discharge cylinder; 301, mud discharge pipe; 4, overflow cylinder; 401, feed port; 402, liquid outlet; 403, upper cylinder; 4031, conical guide pipe; 404, lower cylinder; 405, middle cylinder; 4051, spiral conveying blade; 5, bucket filter plate; 6, mud discharge groove; 601, connecting rod; 602, filter screen cylinder; 7, elastic guide plate; 8, driving 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 DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. 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, and it can be the internal connection of two components; for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Example: Refer to Figure 1-7A large-scale trailing suction dredging vessel high-efficiency dredging overflow device comprises a mounting plate 1, a hydraulic cylinder 2 is fixedly arranged 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 fixedly arranged at the bottom end of the mud discharge cylinder 3, an overflow cylinder 4 is arranged in the mud discharge cylinder 3, a feed inlet 401 and a liquid outlet 402 are respectively provided at the top and bottom of the overflow cylinder 4, a bucket-shaped filter plate 5 is arranged in the overflow cylinder 4, the overflow cylinder 4 is placed on the upper side of the bucket-shaped filter plate 5 and a mud discharge groove 6 connected with the mud discharge cylinder 3 is provided, a retractable assembly for driving the bucket-shaped filter plate 5 to rise and fall is arranged in the overflow cylinder 4, and an elastic guide plate 7 connected with the retractable assembly is also connected to the outside of the overflow cylinder 4.

[0031] Furthermore, a threaded hole 15 is provided on the mounting plate 1, and a bolt is movably connected in the threaded hole 15, and the mounting plate 1 is mounted in the mud cabin by the bolt.

[0032] Specifically, the mounting plate 1 is installed in the mud chamber by bolts, and then the hydraulic cylinder 2 is controlled to operate so that the output end of the hydraulic cylinder 2 drives the overflow tube 4 to move through the mud discharge tube 3, so that the feed port 401 of the overflow tube 4 is lower than the water surface in the mud chamber, so that mud and water enter the overflow tube 4 from the feed port 401, and the mud and water are filtered and separated by the bucket-shaped filter plate 5, and the separated water is discharged from the liquid outlet 402 at the bottom of the overflow tube 4, and the separated mud and sand are discharged from the mud discharge pipe 301 of the mud discharge tube 3 to the inside of the mud chamber. The present application reciprocates the bucket-shaped filter plate 5 and the elastic guide plate 7 through the retractable assembly, 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 tube 3, thereby realizing non-stop maintenance and cleaning of the overflow device, ensuring that the overflow device always separates mud and water, improving the overflow efficiency of the water body, reducing the mud and sand loss at the overflow, 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 retractable assembly includes a driving motor 8 fixedly mounted on the top of the overflow tube 4, the output shaft of the driving motor 8 passes through the overflow tube 4 and is connected to a rotating shaft 801 rotating in the overflow tube 4, a first bevel gear 8011 is arranged on the rotating shaft 801, the overflow tube 4 is rotatably connected to a rotating rod 9, one end of the rotating rod 9 is connected to a second bevel gear 901 meshing with the first bevel gear 8011, a first reel 902 and a second reel 903 are arranged on the rotating rod 9, a first pull rope 9021 is wound around the first reel 902, an end of the first pull rope 9021 away from the first reel 902 is connected to the bucket-shaped filter plate 5, a second pull rope 9031 is wound around the second reel 903, and an end of the second pull rope 9031 away from the second reel 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 is intermittently meshed with the second bevel gear 901 .

[0035] Furthermore, a support plate 10 is fixedly provided on the inner wall of the overflow tube 4 , and 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 , and its two ends are respectively connected to the support plate 10 and the bucket-shaped filter plate 5 .

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

[0037] Specifically, when the retractable assembly is working, the drive motor 8 is controlled to run so that the output shaft of the drive motor 8 drives the rotating shaft 801 to rotate. When the rotating shaft 801 rotates, the incomplete bevel gear on the outside intermittently meshes with the second bevel gear 901 on the rotating rod 9. When the first bevel gear 8011 meshes with the second bevel gear 901 for transmission, the first reel 902 on the rotating rod 9 reels the first pull rope 9021, and the second reel 903 reels the second pull rope 9031, so that the bucket-shaped filter plate 5 moves up in the overflow tube 4, and the elastic guide plate 7 turns upward with the connection with the overflow tube 4 as the center. As the bucket-shaped filter plate 5 continues to move up until it moves to the mud discharge groove 6, the mud and sand intercepted by the bucket-shaped filter plate 5 automatically slide down along the curved surface of the bucket-shaped filter plate 5, and pass through the mud discharge groove 6 into the inverted cone-shaped mud and sand temporary storage area formed by the flipping and encirclement of the elastic guide plate 7, effectively To prevent water from entering the mud discharge barrel 3 along the downwardly inclined elastic guide piece 7, and the excess water entering the upper side of the elastic guide piece 7 will flow back to the middle barrel 405 through the filter screen cylinder 602, when the first bevel gear 8011 is no longer meshed with the second bevel gear 901, the elastic element 1003 and the elastic guide piece 7 are reset, and the bucket-shaped filter plate 5 is reset and moved downward in the overflow barrel 4 to continue its mud and water separation work, and when the reset and flipped elastic guide piece 7 is away from the filter screen cylinder 602. The end is lower than the end connected to the filter screen cylinder 602, the elastic guide piece 7 is tilted downward, and the mud and sand on the elastic guide piece 7 will automatically fall into the mud discharge barrel 3, realizing non-stop maintenance and cleaning of the overflow device, ensuring that the overflow device always separates mud and water, improving the overflow efficiency of the water body, reducing the loss of mud and sand at the overflow, and effectively improving 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, and one end of the elastic element 1003 away from the bucket-shaped filter plate 5 is fixedly connected to the rotating ring 1002, and 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 conical guide tube 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 blade 4051 to rotate, so that the spiral conveying blade 4051 transports the mud entering the mud discharge cylinder 3, so as to prevent the mud from accumulating and clogging in the mud discharge cylinder 3 and the mud discharge pipe 301, thereby affecting the normal operation of the overflow device, and when the bucket-shaped filter plate 5 moves up with the first pull rope 9021, it drives the sliding rod and the upper cylinder 403 to slide, thereby guiding the moving 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, so as to prevent 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 around 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 barrel 3, and an elastic telescopic rod 114 is provided between the top of the mud discharge barrel 3 and the bottom of the hydraulic cylinder 2.

[0042] Furthermore, a telescopic tube 12 is rotatably connected to the L-shaped plate 11, a side plate 14 is fixedly provided on the side of the overflow tube 4 and is rotatably connected to the bottom end of the telescopic tube 12, a fifth bevel gear 122 and a fourth bevel gear 121 are respectively provided at the upper and lower ends of the telescopic tube 12, a sixth bevel gear 13 meshing with the fifth bevel gear 122 is provided on the rotating rod 111, and a third bevel gear 904 meshing 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 retractable 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, and the fourth bevel gear 121 drives the telescopic tube 12 and the fifth bevel gear 122 at the upper end of the telescopic tube 12 to mesh with each other, and the fifth bevel gear 122 meshes with the sixth bevel gear 13 on the rotating rod 111, so that the sixth bevel gear 13 drives the rotating rod 111 and the sixth bevel gear 13 on the rotating rod 111 to mesh with each other, so that the third reel 112 on the rotating rod 111 retracts the third pull rope 113 The third pull rope 113 pulls up the mud discharge tube 3, and then the mud discharge tube 3 drives the overflow tube 4 to move upward, so that the amount of mud and water mixed in from the feed port 401 of the overflow tube 4 is reduced, and when the bucket-shaped filter plate 5 is lifted, the distance 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, so that too much water does not have time to pass through the bucket-shaped filter plate 5 and is discharged from the mud discharge trough 6 to the mud compartment again, affecting the mud-water separation effect, making the mud discharged from the mud discharge pipe 301 have a high water content, reducing the overflow efficiency and overflow effect of the mud compartment.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A large-scale trailing suction dredging overflow device, comprising a mounting plate (1), characterized in that: A hydraulic cylinder (2) is fixedly arranged on the mounting plate (1), the bottom end of the hydraulic cylinder (2) is connected to a mud discharge cylinder (3), the bottom end of the mud discharge cylinder (3) is fixedly arranged with a mud discharge pipe (301), an overflow cylinder (4) is arranged inside the mud discharge cylinder (3), a feed inlet (401) and a liquid outlet (402) are respectively provided at the top and bottom of the overflow cylinder (4), a bucket-shaped filter plate (5) is arranged inside the overflow cylinder (4), the overflow cylinder (4) is placed on the upper side of the bucket-shaped filter plate (5) and is provided with a mud discharge groove (6) connected to the mud discharge cylinder (3), a retractable assembly for driving the bucket-shaped filter plate (5) to rise and fall is arranged inside the overflow cylinder (4), and an elastic guide plate (7) connected to the retractable assembly is also connected to the outer side of the overflow cylinder (4).

2. A large-scale trailing suction dredging vessel high-efficiency dredging overflow device according to claim 1, characterized in that: The retractable assembly comprises a drive motor (8) fixedly mounted on the top of the overflow tube (4); an output shaft of the drive motor (8) passes through the overflow tube (4) and is connected to a rotating shaft (801) rotating in the overflow tube (4); a first bevel gear (8011) is arranged on the rotating shaft (801); a rotating rod (9) is rotatably connected to the overflow tube (4); one end of the rotating rod (9) is connected to a second bevel gear (901) meshing with the first bevel gear (8011); The rotating rod (9) is provided with a first reel (902) and a second reel (903); a first pull rope (9021) is wound around and connected to the first reel (902); one end of the first pull rope (9021) away from the first reel (902) is connected to the bucket-shaped filter plate (5); a second pull rope (9031) is wound around and connected to the second reel (903); one end of the second pull rope (9031) away from the second reel (903) is connected to the elastic guide plate (7).

3. A large-scale trailing suction dredging vessel high-efficiency dredging overflow device 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) is intermittently meshed with the second bevel gear (901).

4. A large-scale trailing suction dredging vessel high-efficiency dredging overflow device according to claim 2, characterized in that: A support plate (10) is fixedly provided on the inner wall of the overflow tube (4), and 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), and the two ends of the elastic element are respectively connected to the support plate (10) and the bucket-shaped filter plate (5).

5. A large-scale trailing suction dredging vessel high-efficiency dredging overflow device according to claim 4, characterized in that: The overflow cylinder (4) comprises an upper cylinder (403) fixedly connected to the upper end of the mud discharge cylinder (3), a lower cylinder (404) fixedly connected to the lower end of the mud discharge cylinder (3), and a middle cylinder (405) rotatably connected to the top of the lower cylinder (404); the mud discharge groove (6) is arranged between the middle cylinder (405) and the upper cylinder (403); a connecting rod (601) is fixedly provided on the inner wall of the mud discharge groove (6); the bottom of the connecting rod (601) is connected to a filter screen cylinder (602) rotatably connected to the middle cylinder (405); and the elastic guide plate (7) is fixedly provided at the bottom end of the filter screen cylinder (602).

6. A large-scale trailing suction dredging vessel high-efficiency dredging overflow device according to claim 5, characterized in that: The support plate (10) comprises a plate body (1001) and a rotating ring (1002) rotatably connected to the plate body (1001); one end of the elastic element (1003) away from the bucket-shaped filter plate (5) is fixedly connected to the rotating ring (1002); and the bucket-shaped filter plate (5) is slidably connected to the upper cylinder (403) via a sliding rod.

7. A large-scale trailing suction dredging vessel high-efficiency dredging overflow device according to claim 6, characterized in that: The outer wall of the middle cylinder (405) is fixedly provided with a spiral conveying blade (4051), the middle cylinder (405) is connected to the rotating shaft (801) via a support rod, and the inner wall of the upper cylinder (403) is fixedly provided with a conical guide tube (4031).

8. The large-scale trailing suction dredging vessel high-efficiency dredging overflow device 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 around 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 barrel (3), and an elastic telescopic rod (114) is provided between the top of the mud discharge barrel (3) and the bottom of the hydraulic cylinder (2).

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

10. The large-scale trailing suction dredging vessel high-efficiency dredging overflow device according to claim 1, characterized in that: The mounting plate (1) is provided with a threaded hole (15), a bolt is movably connected in the threaded hole (15), and the mounting plate (1) is mounted in the mud cabin by means of the bolt.

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