CN211523332U

CN211523332U - Dredging device

Info

Publication number: CN211523332U
Application number: CN201922161951.8U
Authority: CN
Inventors: 王冰; 姜丽萍; 王京南; 杨礼佼
Original assignee: Yixing Huaduhupo Environmental Protection Machinery Manufacturing Co ltd
Current assignee: Yixing Huaduhupo Environmental Protection Machinery Manufacturing Co ltd
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2020-09-18
Anticipated expiration: 2029-12-05

Abstract

The application provides a sediment removal device, sediment removal device includes: a hull; a sludge pump provided on the hull; a dredging pipe connected with an inlet of the sludge pump; the dredging pipe is provided with a dredging end; the dredging pipe at least has a first working state and a second working state; in the first working state, the dredging end extends into water so that the sludge pump can pump sludge; in the second working state, the dredging end is lifted to limit the sludge from entering the dredging pipe; the force applying mechanism is used for applying acting force to the dredging pipe so that the dredging pipe can be switched between the first working state and the second working state; the embodiment of the application provides a dredging device, thereby it is little, the treatment effeciency is high and the volume is less can be fit for city inland river to the disturbance of water.

Description

Dredging device

Technical Field

The application relates to a dredging device.

Background

Urban black and odorous water is a general term for water bodies in urban built-up areas that exhibit unpleasant colors (black or blackish) and/or emit unpleasant odors (smells or malodors). The black and odorous water body is mainly caused by water body oxygen deficiency and is also related to water body eutrophication and sediment deposition. Due to the large amount of nutrients contained in the urban river, the aquatic plants/algae in the river are propagated excessively. These plant/algae supply oxygen to the water during the early stage of growth, and decompose and mineralize after death, consuming oxygen-containing organic substances and ammonia nitrogen and residue putrefaction, resulting in the blackening of seasonal water and generation of an extremely strong fishy smell. Therefore, the elimination of putrefaction and deposited sludge formed by aquatic plants or water bloom algae is a main effective measure for eliminating black and odorous water.

The putrefaction and sediment sludge formed by the aquatic plants or the water bloom algae can be removed by adopting a mechanical dredging mode. The mechanical dredging mode comprises an excavator, a cutter suction dredger and the like. When the excavator is used for dredging, water in a river channel needs to be drained. Therefore, the dredging of the excavator damages the original biological population structure and ecological environment of the lake, weakens the self-cleaning function of the lake and brings negative effects on ecological restoration. When the cutter suction dredger is used for dredging, water in a river channel does not need to be drained, but the water body is disturbed greatly in the operation process, the treatment efficiency is low, the suction height from the bottom of a riverbed cannot be accurately controlled, and the cutter suction dredger is large in size and not suitable for urban inland rivers.

Therefore, there is a need to provide a dredging device to overcome the above-mentioned drawbacks.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiment of the application provides a desilting device, and it is little to the disturbance of water, the treatment effeciency is high and the volume is less so can be fit for urban inland river.

In order to achieve the purpose, the application provides the following technical scheme: a dredging device, comprising: a hull; a sludge pump provided on the hull; a dredging pipe connected with an inlet of the sludge pump; the dredging pipe is provided with a dredging end; the dredging pipe at least has a first working state and a second working state; in the first working state, the dredging end extends into water so that the sludge pump can pump sludge; in the second working state, the dredging end is lifted to limit the sludge from entering the dredging pipe; and the force application mechanism is used for applying acting force to the dredging pipe so that the dredging pipe can be switched between the first working state and the second working state.

As a preferred embodiment, the force application mechanism includes a support arm provided on the hull; the supporting arm can rotate relative to the ship body so as to drive the dredging pipe to be switched between the first working state and the second working state.

As a preferred embodiment, the force application mechanism further comprises a winch; the steel wire rope of the winch is connected with the supporting arm; so that the support arm can rotate relative to the hull.

As a preferred embodiment, it comprises: a first floater facing a rotation center of the support arm in a traveling direction of the hull.

As a preferred embodiment, the method further comprises: and the fixing piece is connected with the supporting arm, and the dredging end is fixed on the fixing piece.

In a preferred embodiment, the fixing member is further provided with a collecting portion for collecting sludge, and the dredging end is open to the collecting portion.

In a preferred embodiment, the collecting part is a screw having a first spiral section and a second spiral section, and the first spiral section and the second spiral section are arranged side by side along the extending direction of the screw; and the first spiral section and the second spiral section have opposite rotation directions.

In a preferred embodiment, the screw is located in front of the hull, and the screw extends in a direction perpendicular to a traveling direction of the hull.

As a preferred embodiment, the dredging device further comprises a filtering device, wherein the filtering device is used for filtering fault objects in the sludge; comprises a first filtering mechanism positioned in front of the collecting part; and a second filter mechanism provided on the dredging pipe and located upstream of the inlet in a flow direction of the sludge.

In a preferred embodiment, the longitudinal direction of the first filter means coincides with the extending direction of the screw.

Borrow by above technical scheme, the desilting device of this application embodiment make the during operation through setting up hull, silt pump, desilting pipe and application of force mechanism, the hull operation is in city river course, and the desilting pipe can stretch into city river course's aquatic under application of force mechanism, and silt pump sending silt. When the desilting device of this application desilting like this dredges, need not be with the log raft in the river course clean. And the sludge pump has small disturbance to the water body when pumping the sludge, and the treatment efficiency is high. And the suction height of the dredging end of the dredging pipe from the bottom of the river bed can be accurately controlled through the force application device. Therefore, the embodiment of the application provides a dredging device, thereby it is little to the disturbance of water, the treatment effeciency is high and the volume is less can be fit for city inland river.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for assisting the understanding of the present application, and are not particularly limited to the shapes, the proportional sizes, and the like of the respective members in the present application. Those skilled in the art, having the benefit of the teachings of this application, may select various possible shapes and proportional sizes to implement the present application, depending on the particular situation. In the drawings:

FIG. 1 is a schematic structural diagram of a dredging device according to an embodiment of the present application;

fig. 2 is a side view of the dredging device according to the embodiment of the present application.

Description of reference numerals:

11. a hull; 15. a sludge pump; 17. dredging the pipe; 19. dredging end; 21. a support arm; 23. a force application mechanism; 25. a winch; 27. a wire rope; 29. a first float; 31. a second float; 33. a fixing member; 35. a collecting section; 37. a first filter mechanism; 39. a second filter mechanism; 41. a first upright rod; 43. a second upright stanchion; 45. a first cross bar; 47. a second cross bar; 49. a propeller; 51. a hydraulic drive mechanism; 53. a control cabinet.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Please refer to fig. 1-2. The embodiment of this application provides a sediment removal device, sediment removal device includes: a hull 11; a sludge pump 15 provided on the hull 11; a dredging pipe 17 connected to an inlet of the sludge pump 15; the dredging pipe 17 has a dredging end 19; the dredging pipe 17 at least has a first working state and a second working state; in the first operating condition, the dredging end 19 extends into the water to enable the sludge pump 15 to pump sludge; in the second operating condition, the dredging end 19 is lifted to restrict sludge from entering the dredging pipe 17; a force applying mechanism 23 for applying a force to the dredging pipe 17 to enable the dredging pipe 17 to be switched between the first operating state and the second operating state.

In operation, the hull 11 is operated in an urban river. The force applying mechanism 23 applies force to the dredging pipe 17 to make the dredging pipe 17 in the first working state, i.e. the dredging end 19 of the dredging pipe 17 extends into the water of the urban river channel, so that the sludge pump 15 can pump the sludge in the urban river channel. When the work is finished, the force applying mechanism 23 applies acting force to the dredging pipe 17, so that the dredging pipe 17 is in the second working state, namely the dredging end 19 is lifted, so as to limit the sludge from entering the dredging pipe 17, and further, the dredging work in the urban river channel is finished.

It can be seen from the above scheme that the dredging device of the embodiment of the present application enables the operation by arranging the hull 11, the sludge pump 15, the dredging pipe 17 and the force applying mechanism 23, the hull 11 runs in the urban river channel, the dredging pipe 17 can extend into the water in the urban river channel under the action of the force applying mechanism 23, and the sludge pump 15 pumps sludge. When the desilting device of this application desilting like this dredges, need not be with the log raft in the river course clean. And the sludge pump 15 has small disturbance to the water body when pumping the sludge, and the treatment efficiency is high. And the suction depth of the dredging end 19 of the dredging pipe 17 from the bottom of the river bed can be accurately controlled by the force application device.

In this embodiment, the hull 11 can be used to operate in an urban river. Of course, the hull 11 is not limited to operate in an urban river, but may also operate in a rural river, and this application does not require this. Specifically, the hull 11 may be a hollow structure as a whole. Thus, when the hull 11 is operating in a river, the hull 11 can be subject to buoyancy and thus float on the surface of the river. Of course, the hull 11 is not limited to a hollow structure, and may have other structures, for example, as shown in fig. 1, the hull 11 has a plate-like structure. This also enables the hull 11 to float on the surface of the river, and is not specified in this application.

Further, a propeller 49 is provided on the hull 11. As shown in fig. 2, for example, the propeller 49 is provided at the bottom of the hull 11. Further, the propeller 49 is used to provide propulsion power for the operation of the hull 11. The propeller 49 may be of conventional construction and is not intended to be limited to this application. Further, the number of the pushers 49 may be 4. The hull 11 is provided with 2 thrusters 49 on each side perpendicular to its direction of travel.

Further, a second floating body 31 for providing buoyancy to the hull 11 so that the hull 11 can operate in an urban river is further provided on the hull 11. Specifically, as shown in fig. 1, the second floating bodies 31 are two. The two second floats 31 are respectively located on both sides of the hull 11 perpendicular to the traveling direction. Further, the second float 31 may be a pontoon having a hollow structure, in particular. Of course, the second floating body 31 is not limited to a buoy, but may be a floating pipe or a floating ring, etc., and this is not limited in this application.

In the present embodiment, the sludge pump 15 is provided on the hull 11. The sludge pump 15 is provided on the upper surface of the hull 11, as shown in fig. 1, for example. Further, the sludge pump 15 may be fixed to the upper surface of the hull 11. The fixing mode can be screw fixation, bolt fixation, welding fixation, integral forming fixation and the like. Of course, the sludge pump 15 is not limited to being fixed to the upper surface of the hull 11, and the sludge pump 15 may be placed on the upper surface of the hull 11. This application is not intended to be limited thereto. Further, the sludge pump 15 is used for sucking and pumping the sludge. Specifically, the sludge pump 15 may be a rotary pump. Of course, the sludge pump 15 is not limited to a rotor pump, but may be other pumps such as a centrifugal pump, for which the present application is not limited.

Further, a sludge discharge pipe is connected to an outlet of the sludge pump 15. So that the sludge pump 15 can pump the sludge to the bank of the river channel through the sludge discharge pipe when pumping and pumping the sludge. Further, the connection method may be screw connection, bolt connection, welding, integral molding, etc., and this application does not specify this. Specifically, the sludge discharge pipe may be fitted over the outer wall of the outlet of the sludge pump 15. Of course, the connection of the sludge discharge pipe and the outlet of the sludge pump 15 is not limited to the sludge discharge pipe being sleeved on the outer wall of the outlet of the sludge pump 15, and the sludge discharge pipe may be inserted into the outlet of the sludge pump 15, and this application does not make any provisions.

In the present embodiment, the dredging pipe 17 is connected to the inlet of the sludge pump 15. Specifically, the dredging pipe 17 may be fitted over the outer wall of the inlet of the sludge pump 15. Of course, the connection between the dredging pipe 17 and the inlet of the sludge pump 15 is not limited to the dredging pipe 17 being sleeved on the outer wall of the inlet of the sludge pump 15, and the dredging pipe 17 may be inserted into the inlet of the sludge pump 15, which is not specified in this application. The dredging pipe 17 has a sludge end. Specifically, one end of the dredging pipe 17 is connected to an inlet of the sludge pump 15, and the other end of the dredging pipe 17 is a dredging end 19. For example, as shown in FIG. 2, the right end of the dredging pipe 17 is connected to the inlet of the sludge pump 15. The left end of the dredging pipe 17 is a dredging end 19. The dredging pipe 17 at least has a first working state and a second working state; in the first operating condition, the dredging end 19 is extended into the water to enable the sludge pump 15 to pump sludge; in the second operating condition, the dredging end 19 is raised to restrict the sludge from entering the dredging pipe 17. Thereby when needs are cleared up the silt in the river course, can make the desilting end 19 of desilting pipe 17 stretch into the aquatic, and then make silt pump 15 can aspirate the silt in the river course and make the silt in the river course can inhale in desilting pipe 17 through desilting end 19, finally follow and arrange the intraductal outflow of mud. For example, as shown in fig. 2, when the sludge in the river needs to be cleaned, the left end of the dredging pipe 17 can be moved downwards and can extend into the water in the river, so that the sludge pump 15 can pump the sludge, that is, the dredging pipe 17 is in the first working state. After the sludge in the river channel is cleaned, the left end of the dredging pipe 17 can move upwards, namely the dredging end 19 is lifted, and then the sludge can be prevented from entering the dredging end 19.

In the present embodiment, the urging mechanism 23 is used to apply an urging force to the dredging pipe 17 so that the dredging pipe 17 can be switched between the first operating state and the second operating state. Specifically, as shown in fig. 2, the urging mechanism 23 can apply a pulling force to the dredging pipe 17 so that the dredging end 19 of the dredging pipe 17 can be moved in the up-down direction to be switched between the first operating state and the second operating state.

In one embodiment, the forcing mechanism 23 includes a support arm 21 disposed on the hull 11. For example, as shown in fig. 1, the support arms 21 are two in number. The two support arms 21 are located on both sides of the hull 11 perpendicular to the direction of travel. Each support arm 21 extends in the left-right direction. The support arm 21 is rotatable relative to the hull 11 to enable the dredging pipe 17 to be switched between the first and second operating conditions. That is, the dredging end 19 of the dredging pipe 17 can be moved in the up-and-down direction by the rotation of the support arm 21. Specifically, as shown in fig. 1, the support arm 21 can rotate in the up-down direction. When the support arm 21 is rotated downwardly, the support arm 21 can drive the dredging end 19 of the dredging pipe 17 to move downwardly. When the support arm 21 is pivoted upwardly, the support arm 21 can move the dredging end 19 of the dredging pipe 17 upwardly. So that when the support arm 21 is rotated in the up-down direction, the support arm 21 can drive the dredging end 19 of the dredging pipe 17 to move in the up-down direction. More specifically, one end of the support arm 21 is hinged to the hull 11 so that the support arm 21 can rotate relative to the hull 11. The right end of the support arm 21 is hinged to the hull 11, as shown in figure 1 for example. So that the support arm 21 can be rotated in the up-down direction about its rotation center. Of course, one end of the support arm 21 is not limited to be hinged to the hull 11, but may be pivotally connected to the hull 11, so that the support arm 21 can rotate in the up-and-down direction about its rotation center with respect to the hull 11.

Further, the urging mechanism 23 further includes a hoist 25. For example, as shown in fig. 1, the hoist 25 includes two drive wheels. The two drive wheels share a drive shaft. And the two driving wheels are respectively positioned on both sides of the hull 11 perpendicular to the traveling direction. A cable 27 is wound around each drive wheel. Further, a wire rope 27 of the hoist 25 is connected to the support arm 21; so that support arm 21 can rotate relative to hull 11. I.e. the wire rope 27 of each drive wheel is connected to one support arm 21 each. The connection method may be bonding, but is not limited to bonding, and the wire rope 27 may be wound around the support arm 21, which is not specified in this application. Further, as shown in fig. 1 and 2, the hoist 25 is provided above the support arm 21. The wire rope 27 extends in the vertical direction. So that the support arm 21 is driven to rotate in the up-down direction when the wire rope 27 of the hoist 25 moves in the up-down direction, thereby allowing the dredging end 19 of the dredging pipe 17 to move in the up-down direction.

Further, the desilting device of this application embodiment still includes: a first float 29. The first floating body 29 is opposed to the rotation center of the support arm 21 in the traveling direction of the hull 11. For example, as shown in fig. 1, the first buoyant body 29 is located on the left side of the hull 11. The center of rotation of the support arm 21 is located on the right side of the hull 11. The traveling direction of the hull 11 is the left-right direction. So that the rotation center of the first floating body 29 and the support arm 21 are opposed in the traveling direction of the hull 11. The first floating body 29 can move in the up-and-down direction, thereby changing the volume of the first floating body 29 entering the water, and changing the buoyancy force to which the first floating body 29 is subjected. Thus, when the supporting arm 21 rotates up and down to drive the dredging end 19 of the dredging pipe 17 to move up and down, the ship body 11 can be always kept in a horizontal state by changing the buoyancy force applied to the first floating body 29, so that the ship body 11 is prevented from inclining.

In one embodiment, the dredging device according to the embodiment of the present application further comprises: a mount 33 connected to the support arm 21. For example, as shown in fig. 2, the mount 33 is located on the left side of the support arm 21. I.e. the mount 33 is located forward of the hull 11. The dredging end 19 is fixed to the fixing member 33. The fixing mode can be screw fixing, bolt fixing, welding fixing, integral forming fixing and the like, and the application is not specified. So that when the left end of the support arm 21 is rotated in the up-down direction, the support arm 21 can drive the fixing member 33 to move in the up-down direction, and the fixing member 33 can drive the dredging end 19 to move in the up-down direction. Further, as shown in fig. 1, both ends of the fixing member 33 are connected to the support arms 21 on both sides of the hull 11, respectively. The connection means may be a screw connection, a bolt connection, a welding, an integral molding, etc., and this application does not specify this. So that the fixing member 33 can be moved in the up-and-down direction by the two support arms 21.

In particular, the fixing member 33 includes a vertically disposed vertical rod and a horizontally disposed horizontal rod. The upright comprises a first upright 41 and a second upright 43 arranged at intervals. The cross-bar comprises a first cross-bar 45 and a second cross-bar 47 between the first upright 41 and the second upright 43. The first crossbar 45 is positioned above the second crossbar 47. The first upright 41, the second upright 43, the first cross bar 45 and the second cross bar 47 form a rectangular structural frame therebetween.

Further, each support arm 21 comprises a first extension and a second extension arranged at an angle. The first and second extensions are connected to the fixing member 33 and the hull 11, respectively. For example, as shown in fig. 1, the first extension is located to the left of the second extension. The angle formed between the first extension and the second extension is greater than 0 degrees and less than 180 degrees. For example, the angle between the first and second extensions is 125 °. The left end of the first extension section is connected with the upright rod. The right end of the second extension is hinged to the hull 11.

Further, the fixing member 33 is provided with a collecting portion 35 for gathering the sludge. So that the sludge on the riverbed of the river can be collected by the collecting part 35 to facilitate the suction and pumping of the sludge pump 15. Further, the dredging end 19 is open toward the collecting portion 35. So that the sludge pump 15 can suck and pump the collected sludge through the sludge-removing end 19 when the sludge is collected in the collecting portion 35.

Preferably, the collecting part 35 is a screw. The screw has a first helical section and a second helical section. And the first spiral section and the second spiral section are arranged in parallel along the extending direction of the screw rod. And the rotation directions of the first spiral section and the second spiral section are opposite. So that the first and second flights of the screw can gather sludge from both ends of the screw towards the middle of the screw as the screw rotates. And the screw is located in front of the hull 11. The screw extends in a direction perpendicular to the direction of travel of the hull 11. So that the screws can gather sludge from both sides perpendicular to the traveling direction of the hull 11 toward the middle. Further, the dredging end 19 is opened toward the middle of the screw, so that after the screw gathers sludge from both sides perpendicular to the traveling direction of the hull 11 toward the middle, the dredging end 19 can pump the sludge gathered at the middle of the screw by the sludge pump 15, thus completing the cleaning of the sludge of the river bed.

In one embodiment, the dredging device according to the embodiment of the present application further comprises a filtering device. The filter device is used for filtering solids in sludge. Thereby avoiding the solid in the silt to damage the dredging device of the embodiment of the application. The solid may be a large solid or a small solid. The large solid may be, for example, a plastic bag, a hemp bag, a waste fishing net, a glass bottle, a plastic bottle, a metal wood block, or the like, and this is not intended to limit the present application. The solid of the small block can be small stone, small wood block, etc., and the application is not specified.

Specifically, the filtering device comprises a first filtering means 37, located in front of said collecting portion 35; and a second filter mechanism 39 provided on the dredging pipe 17 and located upstream of the inlet in the flow direction of the sludge. The first filter mechanism 37 is used to filter large pieces of solids that may damage the screw. The second filter mechanism 39 is used to filter small pieces of solids. Thereby avoiding the small pieces of solids from damaging the dredging pipe 17 and the dredging pump. Further, the first filter mechanism 37 may be a filter screen. The filter mesh may be made of stainless steel. Of course, the filter net is not limited to be made of stainless steel, and may also be made of cotton fiber, and the application is not limited thereto. The second filter means 39 may also be a filter screen. However, the filtering accuracy of the second filtering mechanism 39 is smaller than that of the first filtering mechanism 37, so that the second filtering mechanism 39 can perform secondary filtering on the sludge after the sludge is filtered by the first filtering mechanism 37, and thus the filtering effect is improved.

Further, the length direction of the first filter mechanism 37 coincides with the extending direction of the screw. The first filter mechanism 37 can thus ensure that the sludge accumulated by the screw is filtered once by the first filter mechanism 37.

In one embodiment, the dredging device according to the embodiment of the present application further comprises: a hydraulic drive mechanism 51 connected to the sludge pump 15. The hydraulic drive mechanism 51 may be a hydraulic pump. So that the collecting part 35 and the first floating body 29 can be powered by the hydraulic drive mechanism 51. That is, the hydraulic driving mechanism 51 can drive the rotation of the collecting part 35. And the hydraulic driving mechanism can drive the first floating body 29 to move up and down, so as to change the volume of the first floating body 29 entering the water, thereby changing the buoyancy force on the first floating body 29.

In one embodiment, the dredging device according to the embodiment of the present application further comprises: and a control cabinet 53 electrically connected to the hydraulic drive mechanism 51. The control cabinet 53 is used to provide power distribution and control the opening and closing of the hydraulic drive mechanism 51.

It should be noted that, in the description of the present application, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no precedence between the two is intended or should be construed to indicate or imply relative importance. In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of subject matter that is disclosed herein is not intended to forego the subject matter and should not be construed as an admission that the applicant does not consider such subject matter to be part of the disclosed subject matter.

Claims

1. A dredging device, characterized in that, it includes:

a hull;

a sludge pump provided on the hull;

a dredging pipe connected with an inlet of the sludge pump; the dredging pipe is provided with a dredging end; the dredging pipe at least has a first working state and a second working state; in the first working state, the dredging end extends into water so that the sludge pump can pump sludge; in the second working state, the dredging end is lifted to limit the sludge from entering the dredging pipe;

and the force application mechanism is used for applying acting force to the dredging pipe so that the dredging pipe can be switched between the first working state and the second working state.

2. The dredging device of claim 1, wherein: the force application mechanism comprises a supporting arm arranged on the ship body; the supporting arm can rotate relative to the ship body so as to drive the dredging pipe to be switched between the first working state and the second working state.

3. The dredging device according to claim 2, wherein: the force application mechanism also comprises a winch; the steel wire rope of the winch is connected with the supporting arm; so that the support arm can rotate relative to the hull.

4. Dredging device according to claim 2, characterized in that it comprises: a first floater facing a rotation center of the support arm in a traveling direction of the hull.

5. The dredging device according to claim 2, further comprising: and the fixing piece is connected with the supporting arm, and the dredging end is fixed on the fixing piece.

6. The dredging device according to claim 5, wherein: the fixing piece is further provided with a collecting part used for gathering sludge, and the dredging end is open towards the collecting part.

7. The dredging device according to claim 6, wherein: the collecting part is a screw rod, the screw rod is provided with a first spiral section and a second spiral section, and the first spiral section and the second spiral section are arranged in parallel along the extending direction of the screw rod; and the first spiral section and the second spiral section have opposite rotation directions.

8. The dredging device according to claim 7, wherein: the screw rod is positioned in front of the ship body, and the extending direction of the screw rod is vertical to the advancing direction of the ship body.

9. The dredging device according to claim 8, wherein: the dredging device also comprises a filtering device, and the filtering device is used for filtering fault objects in the sludge; comprises a first filtering mechanism positioned in front of the collecting part; and a second filter mechanism provided on the dredging pipe and located upstream of the inlet in a flow direction of the sludge.

10. The dredging device according to claim 9, wherein: the length direction of the first filtering mechanism is consistent with the extending direction of the screw rod.