Dredging equipment for drag suction dredgers

Abstract

The present invention relates to the technical field of drag suction dredgers and discloses a dredging device for a drag suction dredger, comprising a drag head mud suction shell and a top cover, the top cover being fixedly connected to one side of the drag head mud suction shell, connecting vanes being integrally provided on both sides of the top of the drag head mud suction shell, a seal cover being fixedly connected to the top of the drag head mud suction shell, a drive mechanism being provided inside the seal cover, transmission mechanisms being provided on both sides of the drag head mud suction shell, a rolling prevention mechanism being provided between the two transmission mechanisms, a collision prevention mechanism being provided at the bottom of the drag head mud suction shell, a scraper mechanism being provided inside the drag head mud suction shell, and a slag removal mechanism being provided on the top surface of the drag head mud suction shell. The dredging equipment of this drag suction dredger can clean stones trapped on the surface through continuous rotation of the barrier drum and cooperation with the scraper mechanism, preventing clogging of the second passage hole, which is the silt adsorption inlet, and ensuring smooth silt adsorption.

Description

[Technical Field]

[0001] The present invention relates to the technical field of drag suction dredgers, and in particular to the dredging equipment of drag suction dredgers. [Background technology]

[0002] A drag suction dredger is a type of suction dredger that sucks in mud through drag heads attached to both sides or the stern of the hull, and operates while suctioning mud and using a mud scraper to loosen the soil. An open-bottom mud tank is installed inside the vessel, and the tank's capacity indicates the vessel's size. A drag suction dredger is a large, self-propelled hopper-type dredger equipped with a drag head excavator and a hydraulic mud suction device. During dredging, the drag suction pipe is lowered to the river bottom, and the drag head and mud suction pipe use the vacuum action of the mud pump to suck mud from the river bottom into the dredger's mud tank. When the mud tank is full, the drag head is retracted and the vessel navigates to the mud dumping area, where the mud can be unloaded or the dredged mud can be discharged directly from the vessel. There are also dredgers that can automatically suck out the mud unloaded into the mud tank and refill it. These dredgers have excellent navigational capabilities and are self-propelled, self-loading, and self-unloading. Because they remain underway, they do not require positioning equipment. They are suitable for excavating and maintaining long, narrow, and unprotected coastal harbor channels, and are the most efficient at excavating silt.

[0003] Most commercially available drag suction dredger dredging equipment has a grill inside the drag head to prevent large stones from entering the mud suction pipe. However, after long-term use, the clogged stones are absorbed by the negative pressure in the mud suction pipe and accumulate on the surface of the grill, causing clogging of the grill and affecting mud suction efficiency. Therefore, a drag suction dredger dredging equipment that can clean the stones trapped on the surface by rotation, avoid clogging of the silt suction inlet, and ensure smooth silt suction is needed. Summary of the Invention [Problem to be solved by the invention]

[0004] In response to the shortcomings of the prior art, the present invention provides a dredging apparatus for a drag suction dredger that solves the problems described in the background above. [Means for solving the problem]

[0005] The present invention provides the following technical solution: A dredging device for a drag suction dredger, comprising: The drag head mud suction shell includes a drag head mud suction shell and a top cover, the top cover is fixedly connected to one side of the drag head mud suction shell, connecting vanes are integrally provided on both sides of the top of the drag head mud suction shell, a seal cover is fixedly connected to the top of the drag head mud suction shell, a drive mechanism is provided inside the seal cover, transmission mechanisms are provided on both sides of the drag head mud suction shell, a rolling prevention mechanism is provided between the two transmission mechanisms, an anti-collision mechanism is provided at the bottom of the drag head mud suction shell, a scraper mechanism is provided inside the drag head mud suction shell, a slag removal mechanism is provided on the top surface of the drag head mud suction shell, a hydraulic impact mechanism is provided at the bottom of one side of the drag head mud suction shell, and a connecting end is provided on one side of the drag head mud suction shell.

[0006] Preferably, the drive mechanism includes a motor frame, a drive motor, an output shaft, a transmission shaft, a driven gear, and a drive gear, wherein the motor frame is fixedly connected to the upper surface of the drag head mud suction shell, the drive motor is fixedly attached to the inner wall of the motor frame, the output shaft is fixedly connected to the output end of the drive motor via a coupling, the transmission shaft is rotatably connected to the inner wall of the connecting vane, and the connecting vane is fixedly connected to the sealing cover, the driven gear is fixedly attached to the surface of the transmission shaft, the drive gear is fixedly attached to the surface of the output shaft, and the drive gear and the driven gear are meshed and connected.

[0007] Preferably, the drive mechanism further includes a counterweight wheel, the counterweight wheel being fixedly fitted to the outer wall of the transmission shaft, and the counterweight wheel having a cylindrical shape.

[0008] Preferably, the transmission mechanism includes a connecting tube, a driven transmission wheel, a driving transmission wheel, a belt, a connecting bearing, a rotary seal, and a side seal cover, wherein the connecting bearing and the rotary seal are both fixedly attached to the surface of the connecting tube, the number of the connecting tubes is two, and the two connecting tubes are all rotatably connected to the inner walls on both sides of the drag head mud suction shell respectively via connecting bearings and rotary seals, the side seal covers are fixedly connected to both sides of the drag head mud suction shell, and the connecting tube is rotatably connected to the side seal cover via connecting bearings and the rotary seal, the driven transmission wheel is fixedly attached to the outer wall of the connecting tube, the driving transmission wheel is fixedly attached to the outer wall at both ends of the transmission shaft, and the belt is attached between the driven transmission wheel and the driving transmission wheel.

[0009] Preferably, the rolling prevention mechanism includes a barrier drum and a first through hole, the barrier drum being fixedly connected between the two connecting tubes, and the first through hole being drilled through the surface of the barrier drum.

[0010] Preferably, the rolling prevention mechanism further includes a centrifugal cylinder, a reinforcing pillar, a second through hole, and a centrifugal cavity, the centrifugal cylinder is fixedly connected to the inner wall of the barrier drum, the reinforcing pillar is fixedly inserted into the inner wall of the centrifugal cylinder, and the reinforcing pillar is fixedly connected to the connecting cylinder, the second through hole is drilled through the surface of the centrifugal cylinder, and the second through hole and the first through hole correspond to each other, the centrifugal cavity is provided to penetrate the inside of the centrifugal cylinder, and the shape of the centrifugal cavity is hourglass-shaped.

[0011] Preferably, the anti-collision mechanism includes a connecting block, an axle, rollers, and anti-skid tires, the connecting block is integrally provided at the bottom of the drag head mud suction shell, the axle is rotatably connected to the inner wall of the connecting block, the rollers are fixedly attached to both ends of the axle, and the anti-skid tires are fixedly attached to the surface of the axle.

[0012] Preferably, the scraper mechanism includes a scraper frame and a catch claw, the number of the scraper frames is two, and the two scraper frames are all fixedly connected to the inner wall of the drag head mud suction shell, the catch claw is integrally provided on one side of the scraper frame, and the barrier drum is located between the two scraper frames.

[0013] Preferably, the slag discharge mechanism includes a slag discharge port, a one-way plate, and a reed, the slag discharge port is opened through the upper surface of the drag head mud suction shell, and the slag discharge port is located on one side of the scraper frame, the one-way plate is rotatably connected to the upper surface of the drag head mud suction shell, and the one-way plate is located on one side of the slag discharge port, the reed is fixedly connected to the surface of the one-way plate, and the reed is slidably connected to the drag head mud suction shell.

[0014] Preferably, the water pressure impact mechanism includes a water tank and a high-pressure water pipe, the water tank is fixedly connected to the bottom of the drag head mud suction shell, the high-pressure water pipe is fixedly connected to the top of the water tank, and a high-pressure water nozzle is provided at the bottom of the water tank, and the water tank is located on the side away from the connecting end of the roller. [Effects of the Invention]

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The dredging equipment of the drag suction dredger is equipped with a drag head mud suction shell, a top cover, connecting blades, a seal cover, a drive mechanism, a transmission mechanism, a rolling prevention mechanism, a collision prevention mechanism, a scraper mechanism, a slag removal mechanism, and a hydraulic impact mechanism. Through the continuous rotation of the barrier drum and cooperation with the scraper mechanism, it can clean the stones trapped on the surface, avoid clogging of the second passage hole, which is the silt adsorption inlet, and ensure smooth silt adsorption.

[0017] 2. The dredging equipment of the drag suction dredger is provided with a centrifugal cylinder, a reinforcing pillar, a second passage hole, and a centrifugal cavity, so that centrifugal force is generated when the centrifugal cylinder rotates, and stones with large mass on the inner wall of the centrifugal cavity that are prone to clogging are subject to large centrifugal action, and are blocked by the second passage hole, gradually rotate away from the axis, and are discharged from the centrifugal cavity. In this way, silt particles with small volume and mass are subject to small centrifugal action, and are directly sucked into the inside of the drag head mud suction shell through the second passage hole. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a structural schematic diagram of the present invention. [Figure 2] FIG. 2 is a structural schematic diagram of a drive mechanism according to the present invention. [Figure 3] FIG. 3 is an enlarged view of part A in FIG. 2 according to the present invention. [Figure 4] 1 is a structural schematic diagram of a rolling prevention mechanism according to the present invention; [Figure 5] FIG. 2 is a structural schematic diagram of the slag removal mechanism of the present invention. [Figure 6] FIG. 2 is a side view of the centrifugal cylinder of the present invention. [Figure 7] FIG. 2 is an exploded view of the internal structure of the rolling-prevention mechanism of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0019] The technical solutions in the embodiments of the present invention will be described below clearly and completely with reference to the drawings in the embodiments of the present invention, but it is clear that the described embodiments are only a part of the embodiments of the present invention, and do not represent all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present invention.

[0020] 1 to 7, the dredging equipment of the drag suction dredger includes a drag head mud suction shell 1 and a top cover 2, the top cover 2 is fixedly connected to one side of the drag head mud suction shell 1, connecting vanes 3 are integrally provided on both sides of the top of the drag head mud suction shell 1, a seal cover 4 is fixedly connected to the top of the drag head mud suction shell 1, a drive mechanism is provided inside the seal cover 4, transmission mechanisms are provided on both sides of the drag head mud suction shell 1, a rolling prevention mechanism is provided between the two transmission mechanisms, an anti-collision mechanism is provided at the bottom of the drag head mud suction shell 1, a scraper mechanism is provided inside the drag head mud suction shell 1, a slag removal mechanism is provided on the top surface of the drag head mud suction shell 1, a hydraulic impact mechanism is provided at the bottom of one side of the drag head mud suction shell 1, and a connection end 12 is provided on one side of the drag head mud suction shell 1. The drag head mud suction shell 1, top cover 2, connecting blades 3, seal cover 4, drive mechanism, transmission mechanism, anti-roll mechanism, anti-collision mechanism, scraper mechanism, slag removal mechanism, and hydraulic impact mechanism are provided, and through the continuous rotation of the barrier drum 701 and cooperation with the scraper mechanism, stones trapped on the surface can be removed, preventing clogging of the second passage hole 705, which is the silt adsorption inlet, and ensuring smooth silt adsorption.

[0021] Here, the drive mechanism includes a motor frame 501, a drive motor 502, an output shaft 503, a transmission shaft 504, a driven gear 505, and a drive gear 506, wherein the motor frame 501 is fixedly connected to the upper surface of the drag head mud suction shell 1, the drive motor 502 is fixedly attached to the inner wall of the motor frame 501, the output shaft 503 is fixedly connected to the output end of the drive motor 502 via a coupling, the transmission shaft 504 is rotatably connected to the inner wall of the connecting blade 3, and the connecting blade 3 is fixedly connected to the seal cover 4, the driven gear 505 is fixedly attached to the surface of the transmission shaft 504, the drive gear 506 is fixedly attached to the surface of the output shaft 503, and the drive gear 506 and the driven gear 505 are meshed and connected, thereby advantageously supplying power for rotating the barrier drum 701 and the centrifuge cylinder 703.

[0022] Here, the driving mechanism further includes a counterweight wheel 507, which is fixedly fitted to the outer wall of the transmission shaft 504 and has a cylindrical shape, thereby improving the rotational inertia and making it less likely that the connecting tube 601 will stop rotating due to interference from silt or seawater.

[0023] Here, the transmission mechanism includes a connecting tube 601, a driven transmission wheel 602, a driving transmission wheel 603, a belt 604, a connecting bearing 605, a rotating seal 606, and a side seal cover 607. The connecting bearing 605 and the rotating seal 606 are both fixedly attached to the surface of the connecting tube 601. There are two connecting tubes 601, and the two connecting tubes 601 are all rotated on the inner walls on both sides of the drag head mud suction shell 1 through the connecting bearing 605 and the rotating seal 606. The connecting tube 601 is rotatably connected to the side seal cover 607 via a connecting bearing 605 and a rotary seal 606, the driven transmission wheel 602 is fixedly attached to the outer wall of the connecting tube 601, the driving transmission wheel 603 is fixedly attached to the outer wall of both ends of the transmission shaft 504, and the belt 604 is attached between the driven transmission wheel 602 and the driving transmission wheel 603, thereby facilitating power transmission and sealing.

[0024] Here, the rolling prevention mechanism includes a barrier drum 701 and a first through hole 702, the barrier drum 701 is fixedly connected between two connecting tubes 601, and the first through hole 702 is opened through the surface of the barrier drum 701. As a result, stones captured on the surface are cleaned by the rotation of the barrier drum 701.

[0025] Here, the rolling prevention mechanism further includes a centrifugal cylinder 703, a reinforcing pillar 704, a second through hole 705, and a centrifugal cavity 706, the centrifugal cylinder 703 is fixedly connected to the inner wall of the barrier drum 701, the reinforcing pillar 704 is fixedly inserted into the inner wall of the centrifugal cylinder 703, and the reinforcing pillar 704 is fixedly connected to the connecting cylinder 601, the second through hole 705 is drilled through the surface of the centrifugal cylinder 703, and the second through hole 705 and the first through hole 702 correspond to each other, the centrifugal cavity 706 is provided through the inside of the centrifugal cylinder 703, and the centrifugal cavity 706 has an hourglass shape. By providing the centrifugal cylinder 703, the reinforcing pillars 704, the second through holes 705, and the centrifugal cavity 706, centrifugal force is generated when the centrifugal cylinder 703 rotates, and stones that have a large mass and are prone to clogging on the inner wall of the centrifugal cavity 706 are subject to a large centrifugal action, and are blocked by the second through holes 705, gradually rotate away from the axis, and are discharged from the centrifugal cavity 706. In this way, silt particles that are small in volume and mass are subject to a small centrifugal action, and are directly sucked into the inside of the drag head mud suction shell 1 through the second through holes 705.

[0026] Here, the collision prevention mechanism includes a connection block 801, an axle 802, rollers 803, and anti-skid tires 804. The connection block 801 is integrally provided at the bottom of the drag head mud suction shell 1, the axle 802 is rotatably connected to the inner wall of the connection block 801, the rollers 803 are fixedly attached to both ends of the axle 802, and the anti-skid tires 804 are fixedly attached to the surface of the axle 802. This makes it easy to convert impact force into rolling of the rollers 803 and release the force.

[0027] Here, the scraper mechanism includes a scraper frame 901 and a catch claw 902, there are two scraper frames 901, and the two scraper frames 901 are all fixedly connected to the inner wall of the drag head mud suction shell 1, the catch claw 902 is integrally provided on one side of the scraper frame 901, and the barrier drum 701 is located between the two scraper frames 901. This makes it easy to prevent stones scraped on the surface of the barrier drum 701.

[0028] Here, the slag discharge mechanism includes a slag discharge port 1001, a one-way plate 1002, and a reed 1003, the slag discharge port 1001 is opened through the upper surface of the drag head mud suction shell 1, and the slag discharge port 1001 is located on one side of the scraper frame 901, the one-way plate 1002 is rotatably connected to the upper surface of the drag head mud suction shell 1, and the one-way plate 1002 is located on one side of the slag discharge port 1001, and the reed 1003 is fixedly connected to the surface of the one-way plate 1002, and the reed 1003 is slidably connected to the drag head mud suction shell 1. This makes it easy to discharge the stones scraped by the capturing claw 902.

[0029] Here, the water pressure impact mechanism includes a water tank 1101 and a high-pressure water pipe 1102, the water tank 1101 is fixedly connected to the bottom of the drag head mud suction shell 1, the high-pressure water pipe 1102 is fixedly connected to the top of the water tank 1101, and a high-pressure water nozzle is provided at the bottom of the water tank 1101, and the water tank 1101 is located on the side away from the connecting end 12 of the roller 803, thereby contributing to preventing collisions on one side of the water tank 1101.

[0030] The operating principle is as follows: When in use, the drag head mud suction shell 1 is connected to the mud suction pipe, the drive motor 502 is started, and negative pressure is generated by the mud suction pump. The mud suction pipe extends to the drag head mud suction shell 1, which then continuously sucks silt from one side through the barrier drum 701 and the centrifuge cylinder 703 to the mud suction pipe. As silt passes through the barrier drum 701, the drive motor 502 rotates the drive gear 506 via the output shaft 503, which in turn rotates the driven gear 505, thereby rotating the transmission shaft 504, which in turn rotates the drive transmission wheel 603, which in turn rotates the driven transmission wheel 602 via the belt 604, thereby rotating the connecting cylinder 601 and causing the barrier drum 701 and the centrifuge cylinder 703 to rotate synchronously. At this time, silt on one side of the drag head mud suction shell 1 enters the drag head mud suction shell 1 through the first through-hole 702 and the second through-hole 705, and the stones are blocked by the surface of the barrier drum 701. Next, as the barrier drum 701 rotates, the stones are carried to the slag discharge port 1001. Then, as the barrier drum 701 rotates, the stones are scraped by the capturing claws 902, pushing open the one-way plate 1002 and discharged from the slag discharge port 1001. Silt on both ends of the centrifugal cylinder 703 is sucked into the centrifugal cavity 706 by negative pressure. As the centrifugal cylinder 703 continuously rotates, centrifugal force is generated. Stones on the inner wall of the centrifugal cavity 706, which have a large mass and are prone to clogging, are subjected to a large centrifugal force and are stopped by the second through-hole 705. In this way, the stones gradually rotate away from the axis and are finally discharged along the inner wall of the centrifugal cavity 706. Silt particles, which have small volume and mass, are subjected to small centrifugal forces and are directly sucked into the drag head mud suction shell 1 through the second through-hole 705, thereby ensuring that the first through-hole 702 and the second through-hole 705 are always unclogged.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is limited by the appended claims and their equivalents. [Explanation of symbols]

[0032] 1 Drag Head Mud Suction Shell 2 Top cover 3 Connecting blades 4 Seal cover 501 motor frame 502 drive motor 503 Output shaft 504 Transmission shaft 505 Driven gear 506 Drive Gear 507 Counterweight Wheel 601 Connecting tube 602 Driven transmission wheel 603 Drive transmission wheel 604 Belt 605 Connecting bearing 606 Rotating Seal 607 Side seal cover 701 Barrier Drum 702 1st passage hole 703 Centrifugal Cylinder 704 Reinforcement pillar 705 2nd passage hole 706 Centrifugal Cavity 801 Connection Block 802 axle 803 Laura 804 Anti-skid tires 901 Scraper Frame 902 Capture Claw 1001 Slag discharge port 1002 Unidirectional plate 1003 Leads 1101 Water Tank 1102 High-pressure water pipe 12 Connection end

Claims

1. A dredging device for a drag suction dredger, comprising a drag head mud suction shell (1) and a top cover (2), the top cover (2) being fixedly connected to one side of the drag head mud suction shell (1), connection vanes (3) being integrally provided on both sides of the top of the drag head mud suction shell (1), a seal cover (4) being fixedly connected to the top of the drag head mud suction shell (1), a drive mechanism being provided inside the seal cover (4), and a transmission on both sides of the drag head mud suction shell (1). a mechanism is provided, a rolling prevention mechanism is provided between the two transmission mechanisms, a collision prevention mechanism is provided at the bottom of the drag head mud suction shell (1), a scraper mechanism is provided inside the drag head mud suction shell (1), a slag removal mechanism is provided on the upper surface of the drag head mud suction shell (1), a water pressure impact mechanism is provided at the bottom of one side of the drag head mud suction shell (1), and a connecting end (12) is provided on one side of the drag head mud suction shell (1).

2. The drive mechanism includes a motor frame (501), a drive motor (502), an output shaft (503), a transmission shaft (504), a driven gear (505), and a drive gear (506). The motor frame (501) is fixedly connected to the upper surface of the drag head mud suction shell (1). The drive motor (502) is fixedly attached to the inner wall of the motor frame (501). The output shaft (503) is fixed to the output end of the drive motor (502) via a coupling. The dredging equipment of the drag suction dredger according to claim 1, characterized in that the transmission shaft (504) is rotatably connected to the inner wall of the connecting vane (3), and the connecting vane (3) is fixedly connected to the sealing cover (4), the driven gear (505) is fixedly attached to the surface of the transmission shaft (504), the driving gear (506) is fixedly attached to the surface of the output shaft (503), and the driving gear (506) and the driven gear (505) are connected in mesh.

3. The dredging device of a drag suction dredger as described in claim 2, characterized in that the drive mechanism further includes a counterweight wheel (507), the counterweight wheel (507) is fixedly fitted to the outer wall of the transmission shaft (504), and the shape of the counterweight wheel (507) is cylindrical.

4. The transmission mechanism includes a connecting tube (601), a driven transmission wheel (602), a driving transmission wheel (603), a belt (604), a connecting bearing (605), a rotary seal (606), and a side seal cover (607). The connecting bearing (605) and the rotary seal (606) are both fixedly attached to the surface of the connecting tube (601). There are two connecting tubes (601), and the two connecting tubes (601) are both rotatably connected to the inner walls on both sides of the drag head mud suction shell (1) via the connecting bearing (605) and the rotary seal (606). The side seal cover The dredging device of a drag suction dredger as described in claim 2, characterized in that the connecting tube (601) is rotatably connected to the side seal cover (607) via the connecting bearing (605) and the rotating seal (606), the driven transmission wheel (602) is fixedly attached to the outer wall of the connecting tube (601), the driving transmission wheel (603) is fixedly attached to the outer wall of both ends of the transmission shaft (504), and the belt (604) is attached between the driven transmission wheel (602) and the driving transmission wheel (603).

5. The dredging device of a drag suction dredger as described in claim 4, characterized in that the rolling prevention mechanism includes a barrier drum (701) and a first through hole (702), the barrier drum (701) is fixedly connected between the two connecting tubes (601), and the first through hole (702) is drilled through the surface of the barrier drum (701).

6. 6. The dredging device for a drag suction dredger according to claim 5, wherein the anti-rolling mechanism further comprises a centrifugal cylinder (703), a reinforcing pillar (704), a second through hole (705), and a centrifugal cavity (706), the centrifugal cylinder (703) is fixedly connected to the inner wall of the barrier drum (701), the reinforcing pillar (704) is fixedly inserted into the inner wall of the centrifugal cylinder (703), and the reinforcing pillar (704) is fixedly connected to the connecting cylinder (601), the second through hole (705) is drilled through the surface of the centrifugal cylinder (703), and the second through hole (705) corresponds to the first through hole (702), the centrifugal cavity (706) is provided through the inside of the centrifugal cylinder (703), and the centrifugal cavity (706) has an hourglass shape.

7. The dredging equipment of a drag suction dredger as described in claim 1, characterized in that the anti-collision mechanism includes a connection block (801), an axle (802), rollers (803), and anti-skid tires (804), the connection block (801) is integrally provided at the bottom of the drag head mud suction shell (1), the axle (802) is rotatably connected to the inner wall of the connection block (801), the rollers (803) are fixedly attached to both ends of the axle (802), and the anti-skid tires (804) are fixedly attached to the surface of the axle (802).

8. The dredging device of a drag suction dredger as described in claim 5, characterized in that the scraper mechanism includes a scraper frame (901) and a catch claw (902), the number of the scraper frames (901) is two, and the two scraper frames (901) are all fixedly connected to the inner wall of the drag head mud suction shell (1), the catch claw (902) is integrally provided on one side of the scraper frame (901), and the barrier drum (701) is located between the two scraper frames (901).

9. 2. The dredging device of claim 1, wherein the slag discharge mechanism includes a slag discharge port (1001), a one-way plate (1002), and a lead (1003), the slag discharge port (1001) is opened through the upper surface of the drag head mud suction shell (1) and the slag discharge port (1001) is located on one side of the scraper frame (901), the one-way plate (1002) is rotatably connected to the upper surface of the drag head mud suction shell (1) and the one-way plate (1002) is located on one side of the slag discharge port (1001), the lead (1003) is fixedly connected to the surface of the one-way plate (1002), and the lead (1003) is slidably connected to the drag head mud suction shell (1).

10. The dredging device of the drag suction dredger according to claim 1, characterized in that the water pressure impact mechanism includes a water tank (1101) and a high-pressure water pipe (1102), the water tank (1101) is fixedly connected to the bottom of the drag head mud suction shell (1), the high-pressure water pipe (1102) is fixedly connected to the top of the water tank (1101), and a high-pressure water nozzle is provided at the bottom of the water tank (1101), and the water tank (1101) is located on the side away from the connecting end (12) of the roller (803).

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