A kind of dredging equipment and method of cutter suction dredger

Abstract

The invention discloses a dredging device and method for a cutter suction dredger, and belongs to the technical field of dredging devices. A dredging device for a cutter suction dredger comprises a mud conveying pipeline connected to a ship and a cutter suction head arranged at the end of the mud conveying pipeline, and also comprises: a riprap pipe, the upper end of which is movably connected to the ship and used to throw stones on the ship downward, and the end of the riprap pipe away from the ship is connected with a riprap part; a push-flattening seat, which is arranged on both sides of the riprap pipe, and a connecting seat is fixed between the mud conveying pipeline and the riprap pipe, and the connecting seat is connected to the push-flattening seat through a connecting rod; and an underwater rammer, which is arranged at the rear side of the riprap pipe and is connected to the traction steel rope of the winch on the ship; the invention enables dredging excavation, riprap and leveling to be completed at one time, which is convenient for improving work efficiency and can ensure that the density of the stone layer to be compacted is high and uniform.

Description

Technical Field

[0001] The present invention relates to the technical field of dredging equipment, and in particular to dredging equipment and a method for a cutter suction dredger. Background Art

[0002] In the existing immersed tube tunnel construction projects, trench excavation and foundation construction are required on the riverbed or seabed to increase the quality of the foundation. Trench excavation is to use bucket dredgers, suction dredgers or dredgers with mud cutting heads, cranes with claw buckets and other equipment to open up the trench; foundation construction is to use riprap boats to lay stones in the trench to increase the foundation stability of the riverbed or seabed.

[0003] The construction of existing coastal projects requires dredgers and riprap ships to work separately, which affects the construction efficiency of coastal projects. When stones fall along the riprap pipe into the excavated foundation trench, the falling stones are generally piled together in a shape of high in the middle and low around. The piled stones are only leveled by the vibration and downward pressure of the underwater rammer, and the leveling effect is poor, which will lead to uneven density of the stone base and affect the quality of the base bed. 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 dredging device and method for a cutter suction dredger.

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

[0006] A dredging device for a cutter suction dredger, comprising a dredging pipeline connected to the ship and a cutter suction head arranged at the end of the dredging pipeline, and further comprising:

[0007] A riprap pipe, the upper end of which is movably connected to the ship and used to throw stones from the ship downward, and the end of the riprap pipe away from the ship is connected to a riprap part;

[0008] A push-flattening seat, wherein the push-flattening seat is arranged on both sides of the riprap pipe, a connecting seat is fixedly arranged between the mud conveying pipeline and the riprap pipe, and the connecting seat is connected to the push-flattening seat through a connecting rod; and

[0009] An underwater rammer, which is arranged at the rear side of the riprap pipe and is connected to a traction steel rope of a winch on the ship;

[0010] The rock throwing part includes a ball head tube and a rock falling tube fixedly connected to the ball head tube, the connecting seat is provided with a ball groove for the movement of the ball head tube, and the ball head tube is rotatably connected in the ball groove through a pin shaft;

[0011] The riprap 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 slidably connected with a first pull rope, one end of the first pull rope is fixedly connected with an underwater rammer, and the end of the first pull rope away from the underwater rammer passes through the first pulley and the connecting seat in sequence and is connected to the rockfall pipe;

[0012] The said leveling seats are provided in two groups and are symmetrically arranged on both sides of the riprap tube, and are used to level the stones scattered on the path of the riprap tube;

[0013] The push-flattening seat comprises an upper frame seat fixedly connected to the connecting rod of the connecting seat, a fixing rod fixedly arranged on the lower side of the upper frame seat, a lower frame seat arranged at the bottom of the fixing rod, and a push-flat plate arranged on the lower frame seat;

[0014] When dredging by ship, the suction head at the bottom of the mud conveying pipe is placed on the mud surface at the bottom of the water, and then the mud conveying pipe and the suction head are controlled to move in a fan shape to dredge the silt in the fan-shaped area. When dredging, the stones on the ship fall through the riprap pipe, and the fallen stones fall on the area after dredging by the suction head. The push-flattening seat outside the riprap pipe pushes the fallen stones to lay the stones in the area after dredging. At the same time, the winch on the ship is used to reel in the traction steel rope, so that the traction steel rope drives the underwater rammer to move downward, so that the underwater rammer moves to the top of the laid stones and presses down on the stones to compact them.

[0015] Preferably, a plurality of the push plates are provided, the plurality of the push plates are distributed in parallel and are arranged obliquely with respect to the lower frame seat, a plurality of drainage grooves are opened on the push plate, and the push plate is arranged as a comb-tooth structure.

[0016] Preferably, a cavity is opened in the lower frame seat, a rotating rod fixedly connected to multiple push plates one by one is rotatably connected in the cavity, each of the rotating rods is provided with a driven gear, and a rack plate meshing with the driven gear is slidably connected in the cavity.

[0017] Preferably, the two ends of the rack plate are respectively connected to the second pull rope and the third pull rope, the second pull rope and the third pull rope are both connected to the first pull rope, and the second pull rope and the third pull rope are fixed to the upper frame seat through a bracket, the second pull rope is slidably connected to the second pulley, and the third pull rope is slidably connected to the third pulley.

[0018] Preferably, the first pull rope, the second pull rope and the third pull rope are all made of metal, and the outer sides of the first pull rope, the second pull rope and the third pull rope are coated with a corrosion-resistant coating.

[0019] The present invention also discloses a dredging method for a cutter suction dredger, which is performed by applying the aforementioned dredging equipment for a cutter suction dredger, and comprises the following steps:

[0020] S1: When dredging, the suction head at the bottom of the mud pipe is placed on the mud surface at the bottom of the water, and then the mud pipe and the suction head are controlled to move in a fan shape to dredge the mud in the fan-shaped area;

[0021] S2: When the suction head is placed on the bottom mud surface, the traction steel rope is released by the winch on the ship, so that the underwater tamping machine at the end of the traction steel rope moves downward, and the underwater tamping machine moves to the top of the paving stone;

[0022] S3: While the dredging work is being carried out, the stones on the ship fall through the riprap pipe, and the falling stones fall through the riprap to the area after the dredging by the suction head, so that the stones are laid in the area after the dredging;

[0023] S4: When the underwater rammer is working, it vibrates up and down to press down the laid stones. When the underwater rammer moves up, it applies tension to the first pull rope, so that the first pull rope pulls up the stone drop pipe. When the underwater rammer moves down, the first pull rope is no longer stressed, and the stone drop pipe returns to its original position and moves down under its own gravity and the pressure of the stones, so that the stone drop pipe drives the ball head pipe to swing back and forth in the ball groove, so that the stones falling from the end of the stone drop pipe are evenly spread back and forth;

[0024] S5: The leveling seat that moves with the mud conveying pipeline and the riprap pipe can further level the laid stones;

[0025] S6: When the first pull rope moves back and forth, it applies force to the second pull rope and the third pull rope alternately, 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 meshes with the driven gear when it moves back and forth, so that the driven gear drives the push plate to swing back and forth through the rotating rod, so that the push plate can push the stone at multiple angles, and the underwater rammer levels the pushed stone.

[0026] Compared with the prior art, the present invention provides a dredging device and method for a cutter suction dredger, which has the following beneficial effects:

[0027] 1. The dredging equipment and method of the cutter suction dredger dredges the underwater mud surface through the cutter suction head, uses the riprap pipe to lay stones in the area after the cutter suction head has dredged, and uses the underwater rammer to compact the area after the stones have been laid. By completing the dredging excavation, riprap and leveling at one time, it is convenient to shorten the construction period and improve the work efficiency.

[0028] 2. The dredging equipment and method of the cutter suction dredger are characterized in that push-up seats are arranged on both sides of the riprap pipe so that the push-up seats can push up the materials thrown down by the riprap pipe to avoid the accumulation of stones in one place, and when the underwater rammer moves up, a pulling force is applied to the first pull rope so that the first pull rope pulls up the rock-dropping pipe, and when the underwater rammer moves down, the first pull rope is no longer subjected to a force, and the rock-dropping pipe returns to its original position and moves down under its own gravity and the pressure of the stones, so that the rock-dropping pipe drives the ball head pipe to swing back and forth in the ball groove, so that the stones dropped from the port of the rock-dropping pipe are evenly spread back and forth, so that the stones are evenly spread in the dredging area, and the push-up resistance of the push-up seat to the stones is reduced, so that the stones are quickly flattened.

[0029] 3. The dredging equipment and method of the cutter suction dredger is that the first pull rope alternately applies 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 meshes with the driven gear when it moves back and forth, so that the driven gear drives the push plate to swing back and forth through the rotating rod, so that the push plate can push the stone at multiple angles to prevent the stone from being pushed from a single side. The underwater rammer levels the pushed stone to ensure that the stone layer to be compacted is high in density and uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the present invention;

[0031] Figure 2 It is a schematic diagram of the external structure of the riprap pipe of the present invention;

[0032] Figure 3 It is a schematic diagram of the cross-sectional structure of the riprap pipe of the present invention;

[0033] Figure 4 The structure of the riprap part of the present invention is shown in FIG. Figure 1 ;

[0034] Figure 5 The structure of the riprap part of the present invention is shown in FIG. Figure 2 ;

[0035] Figure 6 It is a schematic diagram of the cross-sectional structure of the riprap portion of the present invention;

[0036] Figure 7 It is a structural schematic diagram of the push-flat seat of the present invention;

[0037] Figure 8 A top view of the push-flat seat of the present invention;

[0038] Fig. 9 It is a structural schematic diagram of the push plate of the present invention;

[0039] Fig.10 It is a schematic cross-sectional structure diagram of the lower frame of the present invention;

[0040] Fig.11 It is a schematic diagram of the connection structure of the second pull rope and the third pull rope with the first pull rope of the present invention.

[0041] In the figure: 1, ship; 2, mud conveying pipeline; 201, suction head; 3, riprap pipe; 4, riprap part; 401, ball head pipe; 402, rock drop pipe; 5, push-flat seat; 501, upper frame seat; 502, fixing rod; 503, lower frame seat; 5031, cavity; 504, push plate; 5041, drainage trough; 6, connecting seat; 601, connecting rod; 602, ball trough; 7, underwater rammer; 8, traction rope; 9, connecting rod; 901, first pulley; 902, first pull rope; 10, rotating rod; 1001, driven gear; 11, rack plate; 111, second pull rope; 112, third pull rope; 12, second pulley; 13, third pulley. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0043] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0044] Example 1: Reference Figure 1 , Figure 2 and Figure 3 A dredging device for a cutter suction dredger includes a dredging pipeline 2 connected to a ship 1 and a cutter suction head 201 arranged at the end of the dredging pipeline 2, and further includes:

[0045] 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;

[0046] A bulldozer 5, which is disposed on both sides of the riprap pipe 3, and a connecting seat 6 is fixed between the mud conveying pipeline 2 and the riprap pipe 3, and the connecting seat 6 is connected to the bulldozer 5 through a connecting rod 601; and

[0047] The underwater rammer 7 is arranged at the rear side of the riprap pipe 3 , and the underwater rammer 7 is connected to the traction steel rope 8 of the winch on the ship 1 .

[0048] Specifically, 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 silt in the fan-shaped area. When dredging, the stones on the ship 1 fall through the riprap pipe 3, and the fallen stones fall on the area dredged by the suction head 201 through the riprap part 4. The push-flattening seat 5 outside the riprap pipe 3 pushes the fallen stones to lay the stones in the dredged area. 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 the stones to compact them. The present invention enables dredging, excavation, riprap and leveling to be completed at one time, which is convenient for improving work efficiency and can ensure that the stone layer to be compacted has high density and uniformity.

[0049] Example 2: Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 A dredging device for a cutter suction dredger, based on Example 1, further, the stone throwing part 4 includes a ball head tube 401 and a rock falling tube 402 fixedly connected to the ball head tube 401, and a ball groove 602 for the movement of the ball head tube 401 is opened on the connecting seat 6, and the ball head tube 401 is rotatably connected in the ball groove 602 through a pin shaft.

[0050] Furthermore, a connecting rod 9 is fixedly provided on the riprap tube 3, a first pulley 901 is fixedly provided at the bottom end of the connecting rod 9, a first pull rope 902 is slidably connected to the first pulley 901, one end of the first pull rope 902 is fixedly connected to the underwater rammer 7, and the end of the first pull rope 902 away from the underwater rammer 7 passes through the first pulley 901 and the connecting seat 6 in sequence and is connected to the rockfall tube 402.

[0051] Specifically, when the underwater rammer 7 is working, it presses down the laid stones by frequently vibrating up and down. When the underwater rammer 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 rammer 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, so that the stones are evenly spread in the dredging area, avoiding the accumulation of fallen stones in one place, reducing the subsequent leveling resistance of the leveling seat 5 to the stones, and allowing the stones to be quickly and evenly leveled.

[0052] Example 3: Reference Figure 1 , Figure 2 and Figure 3A dredging device for a cutter suction dredger is disclosed. Based on Example 2, further, two groups of bulldozers 5 are provided and symmetrically arranged on both sides of the riprap tube 3 to bulldoze the stones scattered on the traveling path of the riprap tube 3.

[0053] Specifically, by arranging the push-flattening seat 5 on both sides of the riprap tube 3, when the riprap tube 3 moves back and forth with the suction head 201, the push-flattening seat 5 can push the falling stones in any direction of the riprap tube 3; this avoids the situation where the push-flattening seat 5 is only arranged on one side of the riprap tube 3, and the push-flattening seat 5 can only push the stones when the riprap tube 3 moves left / right, but cannot push the stones scattered when the riprap tube 3 moves back and forth.

[0054] Example 4: Reference Figure 7 , Figure 8 and Fig. 9 , a dredging equipment for a cutter suction dredger, based on Example 3, further, the push-flattening seat 5 includes an upper frame seat 501 fixedly connected to the connecting rod 601 of the 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.

[0055] Furthermore, a plurality of push plates 504 are provided, and the plurality of push plates 504 are distributed in parallel and are arranged obliquely with respect 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-teeth structure.

[0056] Specifically, a push plate 504 is provided at the bottom of the push seat 5, and the push plate 504 can push the uneven top surface of the stone after it falls, and the push plate 504 is obliquely arranged on the lower frame seat 503, which can divert and guide the water flow, reduce the movement resistance of the push plate 504 when it moves horizontally with the riprap pipe 3, and at the same time reduce the forward movement resistance of the push plate 504 when it sails with the ship 1, and the push plate 504 with a comb-tooth structure further reduces its moving contact surface with the water body, effectively reduces its movement resistance, and prolongs its service life.

[0057] Example 5: Reference Fig.10 and Fig.11 A dredging device for a cutter suction dredger, based on Example 4, further, a cavity 5031 is opened in the lower frame seat 503, a rotating rod 10 fixedly connected to a plurality of push plates 504 is rotatably connected in the cavity 5031, each rotating rod 10 is provided with a driven gear 1001, and a rack plate 11 meshing with the driven gear 1001 is slidably connected in the cavity 5031.

[0058] Furthermore, the two ends of the rack plate 11 are respectively connected to the second pull rope 111 and the third pull rope 112, and the second pull rope 111 and the third pull rope 112 are both connected to the first pull rope 902. The second pull rope 12 and the third pulley 13 are fixed to the upper frame seat 501 through a bracket, and 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.

[0059] Specifically, when the underwater rammer 7 is working, the ramming block at the bottom thereof will move back and forth, and the ramming block will drive the first pull rope 902 to move back and forth when moving up and down. When the first pull rope 902 moves up, the second pull rope 111 is pulled and the third pull rope 112 is not under force. When the first pull rope 902 moves down, the second pull rope 111 is not under force and the third pull rope 112 is pulled, so that 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 the rack plate 11 reciprocates and 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 at multiple angles to prevent large resistance to the stone from a single side, and ensure that the stone layer to be compacted has high density and uniformity.

[0060] Example 6: Reference Fig.10 and Fig.11 , a dredging device for a cutter suction dredger, based on Example 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 a corrosion-resistant coating.

[0061] Specifically, the first pull rope 902, the second pull rope 111 and the third pull rope 112 are all made of metal materials with high structural strength to prevent the pull ropes from breaking when subjected to force, 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 to effectively prevent the pull ropes from being corroded by sea water and ensure the service life of the pull ropes.

[0062] The present invention also discloses a dredging method for a cutter suction dredger, which is performed by applying the aforementioned dredging equipment for a cutter suction dredger, and comprises the following steps:

[0063] S1: When dredging, the vessel 1 places the suction head 201 at the bottom of the mud pipe 2 on the mud surface at the bottom of the water, and then controls the mud pipe 2 and the suction head 201 to move in a fan shape to dredge the mud in the fan-shaped area;

[0064] S2: When the suction head 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;

[0065] 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 into the area after the dredging by the suction head 201 through the riprap part 4, so that the stones are laid in the area after the dredging;

[0066] S4: When the underwater rammer 7 is working, it vibrates up and down to press down the laid stones. When the underwater rammer 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 rammer 7 moves down, the first pull rope 902 is no longer stressed, and the stone drop pipe 402 returns to its original position and moves down 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, so that the stones are evenly spread in the dredging area;

[0067] S5: The leveling seat 5 moving with the mud conveying pipeline 2 and the riprap pipe 3 can further level the laid stones;

[0068] 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 503, and the rack plate 11 reciprocates and 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 at multiple angles, and the underwater rammer 7 levels the pushed stone.

[0069] 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 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: Also includes: 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. The dredging equipment of a cutter suction dredger according to claim 1, characterized in that: The push plate (504) is provided in plurality, the plurality of push plates (504) are distributed in parallel and are arranged obliquely with respect to the lower frame seat (503), a plurality of drainage grooves (5041) are provided on the push plate (504), and the push plate (504) is arranged as a comb tooth structure.

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

4. The dredging equipment of a cutter 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), and the second pull rope (111) and the third pull rope (112) are both connected to the first pull rope (902). A second pulley (12) and a third pulley (13) are fixed on the upper frame seat (501) through a bracket, and 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. The dredging equipment of 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 all coated with a corrosion-resistant coating.

6. A dredging method for a cutter suction dredger, comprising: performing dredging by using the dredging device for a cutter suction dredger according to claim 5, wherein: The following steps are involved: 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.

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