CN118880970B

CN118880970B - Cutter suction dredger dredging equipment and method

Info

Publication number: CN118880970B
Application number: CN202411356938.7A
Authority: CN
Inventors: 李翔; 李金伟; 夏毅成; 陈德华; 徐网杰; 张宗祥; 何文辉; 莫少奇; 李建伟
Original assignee: CCCC Guangzhou Dredging Co Ltd.
Current assignee: CCCC Guangzhou Dredging Co Ltd.
Priority date: 2024-09-27
Filing date: 2024-09-27
Publication date: 2024-12-13
Anticipated expiration: 2044-09-27
Also published as: CN118880970A

Abstract

The invention discloses dredging equipment and method for a cutter suction dredger, and belongs to the technical field of dredging equipment. The invention relates to a dredging device of a cutter suction dredger, which comprises a dredger pipeline connected with a ship, a cutter suction head arranged at the tail end of the dredger pipeline, a stone throwing pipe, a pushing seat and an underwater rammer, wherein the upper end of the stone throwing pipe is movably connected with the ship and is used for throwing stones on the ship downwards, one end of the stone throwing pipe, which is far away from the ship, is connected with a stone throwing part, the pushing seat is arranged at two sides of the stone throwing pipe, a connecting seat is fixedly arranged between the dredger pipeline and the stone throwing pipe and is connected with the pushing seat through a connecting rod, and the underwater rammer is arranged at the rear side of the stone throwing pipe and is connected with a traction steel rope of a winch on the ship.

Description

Cutter suction dredger dredging equipment and method

Technical Field

The invention relates to the technical field of dredging equipment, in particular to dredging equipment and method of a cutter suction dredger.

Background

In the existing immersed tube tunnel construction engineering, foundation trench excavation and foundation construction are needed to be carried out on a riverbed or a seabed so as to increase the quality of the foundation bed. The foundation trench is opened by using bucket dredger, suction dredger with mud cutting head or dredger and crane with claw bucket, etc. and the foundation construction is to lay stone in the foundation trench by means of stone throwing ship so as to raise the foundation stability of river bed or seabed.

The construction of the existing coast engineering needs a dredger and a riprap ship to work respectively, so that the construction efficiency of the coast engineering is affected, and when stones fall into a excavated foundation trench along a riprap pipe, the falling stones are generally piled together to form a shape with high middle and low periphery, and the piled stones are leveled only by means of the vibration and the downward pressing of an underwater rammer, so that the leveling effect is poor, the compactness of a stone base layer is uneven, and the quality of a foundation bed is affected.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides dredging equipment and method for a cutter suction dredger.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

the utility model provides a cutter suction dredger dredging equipment, includes the mud pipeline that links to each other with boats and ships and sets up at the cutter suction head of mud pipeline end, still includes:

The upper end of the stone throwing pipe is movably connected with the ship and is used for throwing stones on the ship downwards, and one end of the stone throwing pipe, which is far away from the ship, is connected with a stone throwing part;

The pushing base is arranged at two sides of the riprap pipe, a connecting base is fixedly arranged between the mud conveying pipeline and the riprap pipe and is connected with the pushing base through a connecting rod, and

The underwater rammer is arranged at the rear side of the riprap pipe and is connected with a traction steel rope of a winch on the ship;

the stone throwing part comprises a ball head pipe and a stone falling pipe fixedly connected with the ball head pipe, a ball groove for the ball head pipe to move is formed in the connecting seat, and the ball head pipe is rotationally connected in the ball groove through a pin shaft;

The stone throwing pipe is fixedly provided with a connecting rod, the bottom end of the connecting rod is fixedly provided with a first pulley, the first pulley is connected with a first pull rope in a sliding manner, one end of the first pull rope is fixedly connected with the underwater rammer, and one end of the first pull rope, which is far away from the underwater rammer, sequentially penetrates through the first pulley and the connecting seat and is connected with the stone falling pipe;

The pushing seats are provided with two groups and are symmetrically arranged at two sides of the stone throwing pipe and used for pushing stones thrown on the advancing path of the stone throwing pipe;

the pushing base comprises an upper frame base fixedly connected with a connecting rod of the connecting base, a fixed rod fixedly arranged at the lower side of the upper frame base, a lower frame base arranged at the bottom of the fixed rod and a pushing plate arranged on the lower frame base;

When dredging, the dredger can make the dredger head at the bottom of the dredger pipeline set on the surface of the water bottom mud, then control the dredger pipeline and the dredger head to make fan-shaped movement, and dredge the mud in the fan-shaped area, when dredging, the stones on the dredger can drop down through the stone throwing pipe, the falling stones can drop down in the dredged area of the dredger head through the stone throwing part, the pushing seat at the outer side of the stone throwing pipe can push the falling stones, so that the stones are laid in the dredged area, and at the same time, the traction steel rope is wound by the winch on the dredger, so that the traction steel rope drives the underwater tamper to move downwards, so that the underwater tamper moves to the upper part of the laid stones and presses down the stones.

Preferably, the pushing plates are provided with a plurality of pushing plates which are distributed in parallel and are obliquely arranged with the lower frame seat, a plurality of drainage grooves are formed in the pushing plates, and the pushing plates are arranged to be of comb tooth structures.

Preferably, a cavity is formed in the lower frame seat, rotating rods fixedly connected with the pushing plates one by one are rotatably connected in the cavity, driven gears are arranged on the rotating rods, and rack plates meshed with the driven gears are slidably connected in the cavity.

Preferably, the two ends of the rack plate are respectively connected with a second pull rope and a third pull rope, the second pull rope and the third pull rope are connected with the first pull rope, the upper frame seat is fixedly provided with a second pulley and a third pulley through a bracket, the second pull rope is connected with the second pulley in a sliding manner, and the third pull rope is connected with the third pulley in a sliding manner.

Preferably, the first pull rope, the second pull rope and the third pull rope are all made of metal materials, and the outer sides of the first pull rope, the second pull rope and the third pull rope are all coated with corrosion-resistant coatings.

The invention also discloses a dredging method of the cutter suction dredger, which is carried out by applying the dredging equipment of the cutter suction dredger, and comprises the following steps:

S1, when dredging the ship, placing a twisting suction head at the bottom of a mud conveying pipeline on the surface of water sediment, and then controlling the mud conveying pipeline and the twisting suction head to perform fan-shaped movement to perform dredging on mud in a fan-shaped area;

S2, when the winch suction head is placed on the water bottom mud surface, simultaneously utilizing a winch on a ship to release a traction steel rope, enabling an underwater rammer at the end part of the traction steel rope to move downwards, and enabling the underwater rammer to move to the position above a paved stone;

S3, while dredging, stones on the ship fall through the stone throwing pipe, and the falling stones fall into the dredging area of the twisted suction head through the stone throwing part, so that the stones are paved in the dredging area;

s4, vibrating up and down to press the paved stone when the underwater ramming machine works, applying a pulling force to the first pull rope when the underwater ramming machine moves up, so that the first pull rope pulls up the falling stone pipe, the first pull rope is not stressed when the underwater ramming machine moves down, and the falling stone pipe resets and moves down under the self gravity and the pressure of the stone, so that the falling stone pipe drives the ball head pipe to swing back and forth in the ball groove, and the stone falling from the port of the falling stone pipe is paved uniformly back and forth;

S5, the pushing and flattening seat moving along with the mud conveying pipeline and the stone throwing pipe can further flatten the paved stones;

And S6, alternately applying force to the second pull rope and the third pull rope when the first pull rope moves back and forth, so that the second pull rope and the third pull rope alternately pull the rack plate to move in the lower frame seat, and the rack plate is meshed with the driven gear when moving back and forth, so that the driven gear drives the pushing plate to swing back and forth through the rotating rod, the pushing plate pushes stone to be leveled at multiple angles, and the underwater rammer levels the leveled stone.

Compared with the prior art, the invention provides dredging equipment and method for a cutter suction dredger, which have the following beneficial effects:

1. According to the dredging equipment and the dredging method for the cutter suction dredger, the dredging is carried out on the underwater mud surface through the cutter suction head, stones are paved in the area after dredging through the cutter suction head by utilizing the stone throwing pipe, the area after the stones are paved is compacted through the underwater rammer, dredging, stone throwing and leveling are completed at one time, so that the construction period is shortened, and the working efficiency is improved.

2. According to the cutter suction dredger dredging equipment and method, the pushing seats are arranged on two sides of the stone throwing pipe, so that the pushing seats can push down materials thrown down by the stone throwing pipe, stones are prevented from being piled up in one place, a pulling force is applied to the first pull rope when the underwater rammer moves upwards, the first pull rope pulls up the stone throwing pipe, the first pull rope is not stressed when the underwater rammer moves downwards, the stone throwing pipe resets and moves downwards under the self gravity and the pressure of the stones, and accordingly the stone throwing pipe drives the ball head pipe to swing in a ball groove in a reciprocating mode, stones falling from the ports of the stone throwing pipe are evenly paved back and forth, pushing resistance of the pushing seats to the stones is reduced, and the stones are paved rapidly.

3. According to the dredging equipment and the method for the cutter suction dredger, the second pull rope and the third pull rope are alternately applied with force when the first pull rope moves back and forth, so that the rack plate is alternately pulled to move in the lower frame seat by the second pull rope and the third pull rope, and meshed with the driven gear when the rack plate moves back and forth, so that the driven gear drives the pushing plate to swing back and forth through the rotating rod, the pushing plate pushes stones in multiple angles, the pushing resistance to stones in a single aspect is prevented from being large, the underwater rammer levels the pushed stones, and the compactness of stone layers to be rammed is guaranteed to be high and uniform.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic view of the outer structure of the riprap tube of the present invention;

FIG. 3 is a schematic cross-sectional view of a riprap tube according to the present invention;

FIG. 4 is a schematic view of a stone throwing part according to the present invention;

FIG. 5 is a schematic diagram of a stone throwing portion according to a second embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of a stone throwing portion according to the present invention;

FIG. 7 is a schematic view of the structure of the leveling base of the present invention;

FIG. 8 is a top view of the push bench of the present invention;

FIG. 9 is a schematic view of the pushing plate of the present invention;

FIG. 10 is a schematic cross-sectional view of the lower frame base of the present invention;

fig. 11 is a schematic diagram of a connection structure between a second pull rope and a third pull rope and a first pull rope according to the present invention.

1, A ship, 2, a mud conveying pipeline, 201, a winch suction head, 3, a stone throwing pipe, 4, a stone throwing part, 401, a ball head pipe, 402, a stone throwing pipe, 5, a pushing base, 501, an upper frame base, 502, a fixed rod, 503, a lower frame base, 5031, a cavity, 504, a pushing plate, 5041, a drainage tank, 6, a connecting base, 601, a connecting rod, 602, a ball tank, 7, an underwater rammer, 8, a traction steel rope, 9, a connecting rod, 901, a first pulley, 902, a first pull rope, 10, a rotating rod, 1001, a driven gear, 11, a rack plate, 111, a second pull rope, 112, a third pull rope, 12, a second pulley, 13 and a third pulley.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.

In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Embodiment 1 referring to fig. 1,2 and 3, a cutter suction dredger dredging apparatus comprising a dredger pipe 2 connected to a vessel 1 and a cutter suction head 201 provided at the end of the dredger pipe 2, further comprising:

the upper end of the stone throwing pipe 3 is movably connected with the ship 1 and is used for throwing stones on the ship 1 downwards, and one end, far away from the ship 1, of the stone throwing pipe 3 is connected with a stone throwing part 4;

A flat pushing seat 5, the flat pushing seat 5 is arranged at two sides of the riprap pipe 3, a connecting seat 6 is fixedly arranged between the mud conveying pipeline 2 and the riprap pipe 3, the connecting seat 6 is connected with the flat pushing seat 5 through a connecting rod 601, and

The underwater rammer 7 is arranged at the rear side of the riprap pipe 3, and the underwater rammer 7 is connected with a traction steel rope 8 of a winch on the ship 1.

Specifically, when dredging, the ship 1 makes the winch suction head 201 at the bottom of the mud conveying pipeline 2 place on the water bottom mud surface, then controls the mud conveying pipeline 2 and the winch suction head 201 to make fan-shaped movement, and carries out dredging operation on mud in the fan-shaped area, when dredging operation, stones on the ship 1 fall through the stone throwing pipe 3, the falling stones fall on the dredging area of the winch suction head 201 through the stone throwing part 4, the leveling seat 5 at the outer side of the stone throwing pipe 3 pushes the falling stones, so that the stones are paved in the dredging area, meanwhile, the winch on the ship 1 is utilized to wind the traction steel rope 8, so that the traction steel rope 8 drives the underwater rammer 7 to move downwards, so that the underwater rammer 7 moves to the position above the stones and tamps the stones.

Embodiment 2 referring to fig. 1, 2, 3,4, 5 and 6, in the dredging apparatus for cutter suction dredger, further, based on embodiment 1, the stone throwing portion 4 includes a ball head pipe 401 and a falling stone pipe 402 fixedly connected with the ball head pipe 401, a ball groove 602 for moving the ball head pipe 401 is formed on the connection seat 6, and the ball head pipe 401 is rotatably connected in the ball groove 602 through a pin shaft.

Further, a connecting rod 9 is fixedly arranged on the stone throwing pipe 3, a first pulley 901 is fixedly arranged at the bottom end of the connecting rod 9, a first pull rope 902 is connected to the first pulley 901 in a sliding manner, one end of the first pull rope 902 is fixedly connected with the underwater tamper 7, and one end of the first pull rope 902, far away from the underwater tamper 7, sequentially penetrates through the first pulley 901 and the connecting seat 6 and is connected with the stone falling pipe 402.

Specifically, when the underwater rammer 7 works, the paved stone is pressed down in a frequently up-down vibration mode, when the underwater rammer 7 moves up, a pulling force is applied to the first pull rope 902, so that the first pull rope 902 pulls up the stone falling pipe 402, when the underwater rammer 7 moves down, the first pull rope 902 is not stressed any more, the stone falling pipe 402 resets and moves down under the self gravity and the pressure of the stone, so that the stone falling pipe 402 drives the ball head pipe 401 to swing back and forth in the ball groove 602, the stone falling at the port of the stone falling pipe 402 is uniformly paved back and forth, the stone is uniformly paved in a dredging area, the falling stone is prevented from being accumulated at one position, the pushing resistance of the follow-up pushing seat 5 to the stone is reduced, and the stone is rapidly and uniformly paved.

Embodiment 3 referring to fig. 1,2 and 3, a cutter suction dredger dredging apparatus is further provided, based on embodiment 2, with two sets of leveling seats 5 symmetrically disposed on both sides of the stone throwing pipe 3 for leveling stone thrown on the traveling path of the stone throwing pipe 3.

Specifically, by arranging the leveling seats 5 on both sides of the riprap pipe 3, when the riprap pipe 3 moves back and forth along with the twisted suction head 201, the riprap pipe 3 can throw materials in any direction, the leveling seats 5 can perform leveling action on falling stones, and the situation that the leveling seats 5 can only level stones when the riprap pipe 3 moves left/right and cannot level stones thrown when the riprap pipe 3 moves back is avoided because the leveling seats 5 are arranged on one side of the riprap pipe 3.

Embodiment 4 referring to fig. 7, 8 and 9, a cutter suction dredger dredging apparatus, further, on the basis of embodiment 3, a leveling base 5 includes an upper frame base 501 fixedly connected with a link 601 of a connection base 6, a fixing rod 502 fixedly provided at a lower side of the upper frame base 501, a lower frame base 503 provided at a bottom of the fixing rod 502, and a leveling plate 504 provided on the lower frame base 503.

Further, a plurality of pushing plates 504 are provided, the pushing plates 504 are distributed in parallel and are inclined to the lower frame 503, a plurality of drainage grooves 5041 are formed in the pushing plates 504, and the pushing plates 504 are in a comb structure.

Specifically, the pushing plate 504 is arranged at the bottom of the pushing seat 5, the pushing plate 504 can push the falling stone top surface with uneven surface, the pushing plate 504 is obliquely arranged on the lower frame seat 503, the water flow can be split and dredged, the moving resistance of the pushing plate 504 along with the transverse movement of the stone throwing pipe 3 is reduced, the forward moving resistance of the pushing plate 504 along with the navigation of the ship 1 can be reduced, the moving contact surface of the pushing plate 504 with the water body is further reduced by the pushing plate 504 with a comb tooth structure, the moving resistance of the pushing plate is effectively reduced, and the service life of the pushing plate is prolonged.

Embodiment 5 referring to fig. 10 and 11, further, on the basis of embodiment 4, a cavity 5031 is formed in the lower frame base 503, rotating rods 10 fixedly connected with a plurality of pushing plates 504 one by one are rotatably connected in the cavity 5031, each rotating rod 10 is provided with a driven gear 1001, and a rack plate 11 meshed with the driven gear 1001 is slidably connected in the cavity 5031.

Further, two ends of the rack plate 11 are respectively connected with a second pull rope 111 and a third pull rope 112, the second pull rope 111 and the third pull rope 112 are connected with the first pull rope 902, the upper frame 501 is fixedly provided with a second pulley 12 and a third pulley 13 through a bracket, the second pull rope 111 is connected with the second pulley 12 in a sliding manner, and the third pull rope 112 is connected with the third pulley 13 in a sliding manner.

Specifically, when the underwater rammer 7 works, the ramming block at the bottom of the underwater rammer 7 can reciprocate up and down, the ramming block drives the first pull rope 902 to reciprocate when moving up and down, when the first pull rope 902 moves up, the second pull rope 111 is pulled, the third pull rope 112 is not stressed, when the first pull rope 902 moves down, the second pull rope 111 is not stressed, the third pull rope 112 is pulled, so that when the first pull rope 902 moves back and forth, the second pull rope 111 and the third pull rope 112 alternately apply force, the rack plate 11 is alternately pulled to move in the lower frame seat 503, the rack plate 11 is meshed with the driven gear 1001 when reciprocating, the driven gear 1001 drives the pushing plate 504 to reciprocate through the rotating rod 10, the pushing plate 504 pushes stones at multiple angles, the pushing resistance to stones from a single aspect is prevented from being large, and the compactness of stone layers needing to be compacted is ensured to be high and uniform.

Embodiment 6 referring to fig. 10 and 11, in the dredging apparatus for cutter suction dredger, on the basis of embodiment 5, further, the first pull rope 902, the second pull rope 111 and the third pull rope 112 are all made of metal, and the outer sides of the first pull rope 902, the second pull rope 111 and the third pull rope 112 are coated with corrosion-resistant coatings.

Specifically, the first stay 902, the second stay 111 and the third stay 112 are all made of metal materials with high structural strength, so that the stay is prevented from being broken when being stressed, and the outer sides of the first stay 902, the second stay 111 and the third stay 112 are coated with corrosion-resistant coatings, so that the stay is effectively prevented from being corroded by seawater, and the service life of the stay is ensured.

S1, when dredging, a ship 1 places a twisting suction head 201 at the bottom of a mud conveying pipeline 2 on the surface of water mud, and then controls the mud conveying pipeline 2 and the twisting suction head 201 to perform fan-shaped movement to dredge mud in a fan-shaped area;

S2, when the winch suction head 201 is placed on the water bottom mud surface, simultaneously, the winch on the ship 1 is used for releasing the traction steel rope 8, so that the underwater rammer 7 at the end part of the traction steel rope 8 moves downwards, and the underwater rammer 7 moves to the position above a paved stone;

S3, while dredging, stones on the ship 1 fall through the stone throwing pipe 3, and the falling stones fall into the dredging area of the twisting suction head 201 through the stone throwing part 4, so that the stones are paved in the dredging area;

S4, vibrating up and down to press paved stones when the underwater tamper 7 works, applying a pulling force to the first pull rope 902 when the underwater tamper 7 moves up, so that the first pull rope 902 pulls up the stone falling pipe 402, and the first pull rope 902 is not stressed when the underwater tamper 7 moves down, and the stone falling pipe 402 resets and moves down under the self gravity and the pressure of the stones, so that the stone falling pipe 402 drives the ball head pipe 401 to swing back and forth in the ball groove 602, and stones falling from the port of the stone falling pipe 402 are evenly paved back and forth, so that the stones are evenly paved in dredging areas;

s5, the flattening seat 5 moving along with the mud conveying pipeline 2 and the stone throwing pipe 3 can further flatten the paved stone;

And S6, when the first pull rope 902 moves back and forth, the second pull rope 111 and the third pull rope 112 are alternately applied with force, so that the second pull rope 111 and the third pull rope 112 alternately pull the rack plate 11 to move in the lower frame seat 503, the rack plate 11 is meshed with the driven gear 1001 when moving back and forth, the driven gear 1001 drives the pushing plate 504 to swing back and forth through the rotating rod 10, the pushing plate 504 pushes stone flatly at multiple angles, and the underwater rammer 7 levels the pushed stone flatly.

The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.

Claims

1. A dredging device for a cutter suction dredger, comprising a dredging pipeline (2) connected to a ship (1) and a cutter suction head (201) arranged at the end of the dredging pipeline (2), characterized in that it also comprises:

A riprap pipe (3), the upper end of which is movably connected to the ship (1) and is used to throw stones on the ship (1) downward, and the end of the riprap pipe (3) away from the ship (1) is connected to a riprap part (4);

A push-flattening seat (5), the push-flattening seat (5) being arranged on both sides of the riprap pipe (3), a connecting seat (6) being fixedly arranged between the mud conveying pipeline (2) and the riprap pipe (3), the connecting seat (6) being connected to the push-flattening seat (5) via a connecting rod (601); and

An underwater rammer (7), the underwater rammer (7) being arranged at the rear side of the riprap pipe (3), the underwater rammer (7) being connected to a traction steel rope (8) of a winch on the ship (1);

The rock throwing part (4) comprises a ball head tube (401) and a rock falling tube (402) fixedly connected to the ball head tube (401); a ball groove (602) for the movement of the ball head tube (401) is provided on the connecting seat (6); the ball head tube (401) is rotatably connected in the ball groove (602) via a pin shaft;

The riprap tube (3) is fixedly provided with a connecting rod (9), the bottom end of the connecting rod (9) is fixedly provided with a first pulley (901), the first pulley (901) is slidably connected with a first pull rope (902), one end of the first pull rope (902) is fixedly connected to the underwater tamping machine (7), and the end of the first pull rope (902) away from the underwater tamping machine (7) passes through the first pulley (901) and the connecting seat (6) in sequence and is connected to the rockfall tube (402);

The push-flattening seats (5) are provided in two groups and are symmetrically arranged on both sides of the riprap tube (3) for pushing flat the stones scattered on the path of the riprap tube (3);

The push-flattening seat (5) comprises an upper frame seat (501) fixedly connected to a connecting rod (601) of a connecting seat (6), a fixing rod (502) fixedly arranged on the lower side of the upper frame seat (501), a lower frame seat (503) arranged at the bottom of the fixing rod (502), and a push-flat plate (504) arranged on the lower frame seat (503);

When the ship (1) is dredging, the suction head (201) at the bottom of the mud conveying pipe (2) is placed on the mud surface at the bottom of the water, and then the mud conveying pipe (2) and the suction head (201) are controlled to move in a fan shape to dredge the mud in the fan-shaped area. When dredging, stones on the ship (1) fall through the riprap pipe (3), and the falling stones fall into the area after the suction head (201) has been dredged through the riprap part (4). The push-flattening seat (5) outside the riprap pipe (3) pushes the falling stones to lay the stones in the area after the dredging. At the same time, the winch on the ship (1) is used to reel in the traction steel rope (8), so that the traction steel rope (8) drives the underwater tamping machine (7) to move downward, so that the underwater tamping machine (7) moves to the top of the laid stones and presses down to compact the stones.

2. A dredging equipment for a cutter suction dredger according to claim 1, characterized in that a plurality of the push plates (504) are provided, the plurality of the push plates (504) are distributed in parallel and are inclined to the lower frame (503), a plurality of drainage grooves (5041) are opened on the push plates (504), and the push plates (504) are arranged as a comb tooth structure.

3. A dredging device for a suction dredger according to claim 2, characterized in that a cavity (5031) is provided in the lower frame seat (503), a rotating rod (10) which is fixedly connected to a plurality of push plates (504) in a rotatable manner in the cavity (5031), each of the rotating rods (10) is provided with a driven gear (1001), and a rack plate (11) which is meshed with the driven gear (1001) is slidably connected in the cavity (5031).

4. A dredging device for a suction dredger according to claim 3, characterized in that the two ends of the rack plate (11) are respectively connected to a second pull rope (111) and a third pull rope (112), the second pull rope (111) and the third pull rope (112) are both connected to the first pull rope (902), and a second pull rope (12) and a third pull rope (13) are fixed on the upper frame (501) through a bracket, the second pull rope (111) is slidably connected to the second pulley (12), and the third pull rope (112) is slidably connected to the third pulley (13).

5. A dredging device for a cutter suction dredger according to claim 4, characterized in that the first pull rope (902), the second pull rope (111) and the third pull rope (112) are all made of metal, and the outer sides of the first pull rope (902), the second pull rope (111) and the third pull rope (112) are coated with a corrosion-resistant coating.

6. A method for dredging with a cutter suction dredger, comprising: performing dredging by using the dredging device for a cutter suction dredger according to claim 5, characterized in that the method comprises the following steps:

S1: When the vessel (1) is dredging, the suction head (201) at the bottom of the mud conveying pipeline (2) is placed on the mud surface at the bottom of the water, and then the mud conveying pipeline (2) and the suction head (201) are controlled to move in a fan shape to dredge the mud in the fan-shaped area;

S2: When the winch (201) is placed on the bottom mud surface, the traction steel rope (8) is released by the winch on the ship (1), so that the underwater tamping machine (7) at the end of the traction steel rope (8) moves downward, and the underwater tamping machine (7) moves to the top of the paving stone;

S3: While the dredging work is being carried out, the stones on the ship (1) fall through the riprap pipe (3), and the falling stones fall through the riprap part (4) onto the area after the dredging by the suction head (201), so that the stones are laid in the area after the dredging;

S4: When the underwater tamping machine (7) is working, it vibrates up and down to press down the laid stones. When the underwater tamping machine (7) moves up, it applies tension to the first pull rope (902), so that the first pull rope (902) pulls up the stone drop pipe (402). When the underwater tamping machine (7) moves down, the first pull rope (902) is no longer subjected to force, and the stone drop pipe (402) returns to its original position and moves downward under its own gravity and the pressure of the stones, so that the stone drop pipe (402) drives the ball head tube (401) to swing back and forth in the ball groove (602), so that the stones falling from the end of the stone drop pipe (402) are evenly spread back and forth;

S5: The leveling seat (5) moving with the mud conveying pipeline (2) and the riprap pipe (3) can further level the laid stones;

S6: When the first pull rope (902) moves back and forth, it applies force alternately to the second pull rope (111) and the third pull rope (112), so that the second pull rope (111) and the third pull rope (112) alternately pull the rack plate (11) to move in the lower frame seat (503), and when the rack plate (11) moves back and forth, it meshes with the driven gear (1001), so that the driven gear (1001) drives the push plate (504) to swing back and forth through the rotating rod (10), so that the push plate (504) pushes the stone material at multiple angles, and the underwater tamping machine (7) levels the pushed stone material.