Channel dredging device and construction method

Abstract

The invention discloses a channel dredging device. The channel dredging device comprises a ship body; the rotary crushing assembly comprises a main gear rotating plate, an auxiliary gear rotating plate meshed with the main gear rotating plate and a crushing blade; the first supporting assembly comprises an outer fixing cylinder and a first rotating shaft arranged in the outer fixing cylinder, and the lower end of the first rotating shaft is fixedly connected with the center of the main gear rotating plate; the sludge bin is communicated with the sludge suction pipe; one end of the first supporting rod is fixedly connected with the outer fixing cylinder, and the other end is fixedly connected with the second supporting rod; the second supporting rod is rotatably arranged on the ship body; a driven bevel gear is arranged on the second supporting rod, and a driving bevel gear is arranged at the end of a driving shaft of the second driving motor. One end of the third supporting rod is fixedly connected with the middle of the first supporting rod, and the other end of the third supporting rod is slidably arranged on the arc-shaped slideway. The invention further provides a channel dredging construction method. According to the device and method, the rotary crushing assembly can rotate along the tail of the ship body within a certain radian range while rotating, the dredging range is greatly widened, and the dredging efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of waterway dredging, and more specifically, to a waterway dredging device and a construction method. Background Art

[0002] Channel dredging is the operation of removing underwater silt in a channel by dredging boats or other tools. Channel dredging is one of the main means of developing channels, increasing and maintaining the scale of channels. In ancient times, the dredging method was that people on a boat used a long-handled bucket to dig out silt in the water. Since the emergence of dredgers powered by steam engines, dredging equipment has made rapid progress. The current channel dredging silt cleaning device usually extends the sludge suction pipe into the silt to suck away the sludge at the bottom of the water. However, since the silt often contains a large amount of impurities such as silt, weeds, and some places may have large rocks, it is easy to cause incomplete silt cleaning. If weeds or large rocks are sucked into the sludge suction pipe or equipment, it will also cause pipeline blockage and equipment damage. Summary of the invention

[0003] The present invention provides a channel dredging device and a construction method, which can crush and stir mud lumps, stones or weeds, and then suck the mud into a mud bin, thereby improving the thoroughness of dredging. The arranged rotating crushing component can not only rotate on itself to crush and stir, but also rotate around the stern of the hull within a certain arc range, thereby greatly increasing the range of dredging and also improving the dredging efficiency.

[0004] In order to achieve these purposes and other advantages of the present invention, in a first aspect, the present invention provides a channel dredging device, comprising: hull; The rotary crushing assembly comprises: a main gear rotating plate, which is arranged horizontally; a plurality of sub-gear rotating plates, which are arranged horizontally, each of which is arranged around the main gear rotating plate and meshed with the main gear rotating plate; wherein crushing blades are arranged on the bottom surfaces of the main gear rotating plate and the sub-gear rotating plate; The first support assembly comprises: an outer fixed cylinder, which is hollow inside and vertically arranged at the tail of the hull; a first rotating shaft, which is rotatably arranged inside the outer fixed cylinder, the lower end of the first rotating shaft is exposed from the bottom end of the outer fixed cylinder and is fixedly connected to the center of the main gear rotating plate; wherein a first driving motor is arranged above the outer fixed cylinder, and the driving shaft of the first driving motor is fixedly connected to the upper end of the first rotating shaft; A mud suction pipe, which is arranged on one side of the rotary crushing assembly; A mud bin is arranged on the hull and is communicated with the mud suction pipe, and a mud pump is arranged on the mud suction pipe.

[0005] Preferably, the channel dredging device further comprises a second support assembly, which comprises: A first support rod, which is arranged horizontally and has one end fixedly connected to the outer fixing tube; a second support rod, which is vertically and rotatably arranged on the deck of the hull, and the second support rod is fixedly connected to the other end of the first support rod; wherein a driven bevel gear is arranged on the second support rod; a second driving motor, which is arranged on the deck of the hull, and an active bevel gear is arranged at the end of the horizontal driving shaft of the second driving motor, and the active bevel gear is meshed with the driven bevel gear to drive the second support rod to rotate, thereby driving the first support rod, the outer fixed cylinder, the first rotating shaft and the rotating crushing assembly to rotate with the second support rod as the rotation center; The third support rod is vertically arranged, the upper end of the third support rod is fixedly connected to the middle position of the first support rod, and the lower end of the third support rod is slidably arranged on an arc-shaped slideway located on the hull deck.

[0006] Preferably, the channel dredging device further includes a lifting component, which is fixedly disposed on the deck of the hull, the second drive motor is fixedly disposed on the upper surface of the lifting component, and the second support rod is rotatably disposed on the upper surface of the lifting component.

[0007] Preferably, in the waterway dredging device, the first rotating shaft is rotatably arranged inside the outer fixed cylinder, specifically comprising: a plurality of bearings are fixedly arranged on the inner wall of the outer fixed cylinder, and the first rotating shaft is arranged inside the bearings.

[0008] Preferably, in the waterway dredging device, each of the auxiliary gear rotating plates is arranged around the main gear rotating plate, and the specific arrangement is as follows: An annular plate, which is horizontally fixedly sleeved on the circumference of the bottom end of the outer fixed cylinder, wherein a plurality of first through holes are provided on the annular plate, and the number of the first through holes is the same as the number of the auxiliary gear rotating plate; A plurality of second rotating shafts are vertically arranged, the lower end of each second rotating shaft is fixedly connected to the center position of one of the sub-gear rotating plates, and the upper end thereof passes through one of the first through holes; The annular baffle comprises an upper baffle and a lower baffle, and the upper baffle and the lower baffle are fixedly sleeved on the upper end of each second rotating shaft, and the spacing between the upper baffle and the lower baffle is adapted to the thickness of the annular plate, so that the upper baffle is located above the annular plate, and the lower baffle is located below the annular plate.

[0009] Preferably, in the waterway dredging device, the second support rod is rotatably arranged on the upper surface of the lifting component, and the specific arrangement is as follows: a bearing seat is fixedly arranged on the upper surface of the lifting component, and the lower end of the second support rod is arranged inside the bearing seat, wherein a plurality of downwardly inclined inclined rods are arranged at equal intervals on the circumference of the second support rod, and an annular slide is arranged on the upper surface of the lifting component and around the bearing seat, and the lower ends of the plurality of inclined rods are slidably arranged on the annular slide.

[0010] Preferably, the waterway dredging device further includes a fixing plate, one side of which is fixed to the surface of the outer fixing tube, a second through hole is arranged on the fixing plate, the lower end of the mud suction pipe passes through the second through hole, and the mud suction pipe is fixed to the fixing plate to facilitate the mud suction pipe to absorb mud.

[0011] In a second aspect, the present invention further provides a waterway dredging construction method, which is applied to the waterway dredging device, and comprises the following steps: S1. Drive the ship to the location where the channel silt is to be dredged; S2, start the lifting component to move the first support assembly, the second support assembly and the rotary crushing assembly downward, so that the rotary crushing assembly and the lower end of the sludge suction pipe are located at the sludge position to be dredged; S3, turning on the first driving motor to rotate the first rotating shaft, driving the rotating crushing assembly to rotate, and crushing the sludge and weeds; S4, turning on the second driving motor to drive the second support rod to rotate, thereby driving the first support rod, the outer fixed cylinder, the first rotating shaft and the rotating crushing assembly to rotate with the second support rod as the rotation center; S5. Turn on the mud pump and suck the crushed and stirred mud into the mud bin through the mud suction pipe.

[0012] The present invention has at least the following beneficial effects: First, since the rotary crushing assembly provided in the present invention includes a main gear rotary plate, a plurality of auxiliary gear rotary plates and a crushing blade, it can not only increase the range of crushing, but also increase the fineness of crushing, and also facilitate the suction of the mud suction pipe. The first supporting assembly provided includes an external fixed cylinder and a first rotating shaft, the external fixed cylinder facilitates the rotary crushing assembly to be set on the hull, and the first rotating shaft and the first driving motor can drive the rotary crushing assembly to rotate for stirring and crushing.

[0013] Second, since the second support assembly provided in the present invention includes a first support rod for fixing the external fixing tube, A second support rod is provided to fix the first support rod, a second drive motor is provided to drive the second support rod to rotate, and a third support rod is provided to stabilize the first support rod during the rotation. Therefore, the setting of the second support assembly enables the rotating crushing assembly to rotate along the stern of the hull within a certain arc range while rotating on itself, thereby greatly improving the scope and efficiency of dredging.

[0014] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the side structure of the channel dredging device of the present invention; Figure 2 It is a top view schematic diagram of the arc-shaped slideway in the channel dredging device of the present invention; Figure 3 It is a schematic diagram of the structural relationship of the rotary crushing assembly in the waterway dredging device of the present invention. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0017] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0018] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial sources unless otherwise specified; in the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected, set, or detachably connected, set, or connected and set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in specific circumstances. The orientation or position relationship indicated by the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply 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 of the present invention.

[0019] like Figure 1~Figure 3As shown, an embodiment of the present invention provides a channel dredging device, comprising: a hull 1; a rotating crushing assembly 2, comprising: a main gear rotating plate 200, which is horizontally arranged; a plurality of sub-gear rotating plates 201, which are horizontally arranged, each sub-gear rotating plate 201 is arranged around the main gear rotating plate 200 and meshed with the main gear rotating plate 200; wherein a crushing blade 202 is arranged on the bottom surface of the main gear rotating plate 200 and the sub-gear rotating plate 201; a first supporting assembly 3, comprising: an outer fixing cylinder 300, which is hollow inside and vertically arranged at the tail of the hull 1; A first rotating shaft 301 is rotatably arranged inside the outer fixed cylinder 300, and the lower end of the first rotating shaft 301 is exposed from the bottom end of the outer fixed cylinder 300 and is fixedly connected to the center of the main gear rotating plate 200; wherein a first driving motor 5 is arranged above the outer fixed cylinder 300, and the driving shaft of the first driving motor 5 is fixedly connected to the upper end of the first rotating shaft 301; a mud suction pipe 6 is arranged on one side of the rotating crushing assembly 2; a mud bin 7 is arranged on the hull 1 and is connected to the mud suction pipe 6, and a mud pump 8 is arranged on the mud suction pipe 6.

[0020] In the above embodiment, when specifically arranged, 3 to 5 sub-gear rotating plates 201 can be arranged around the main gear rotating plate 200, the outer diameter of the sub-gear rotating plate 201 is smaller than the outer diameter of the main gear rotating plate 200, and the sub-gear rotating plate 201 is meshed and connected with the main gear rotating plate 200. By driving the main gear rotating plate 200, all the sub-gear rotating plates 201 can rotate, which improves the range of crushing and stirring to a certain extent. In addition, after the main gear rotating plate 200 crushes the mud, weeds or stones in the sludge, due to the rotation of the main gear rotating plate 200, the crushed sludge slurry will be thrown to the vicinity of the circumference. Since the sub-gear rotating plates 201 are arranged around the main gear rotating plate 200, the mud crushed by the main gear rotating plate 200 will be crushed and stirred again by the sub-gear rotating plate 201, which also improves the crushing accuracy to a certain extent, making the suction of the mud suction pipe 6 smoother. The crushing blade 202 can be S-shaped or spiral. Regarding the first drive motor 5 disposed above the outer fixed cylinder 300, in the specific configuration, in order to facilitate the fixing of the first drive motor 5, a horizontal plate body can be disposed at the upper end of the outer fixed cylinder 300, the first drive motor 5 can be fixed on the horizontal plate body, and the drive shaft of the first drive motor 5 passes through the horizontal plate body and is fixedly connected to the first rotating shaft 301. In order to prevent excessive mud and water from entering the outer fixed cylinder 300, a cover body 19 is disposed at the bottom end of the outer fixed cylinder 300, and the lower end of the first rotating shaft 301 passes through the cover body 19 and is exposed from the outer fixed cylinder 300.

[0021] It should be noted that, in the specific implementation, a filter layer can also be set in the mud bin 7, so that after the mud enters the mud bin 7 through the mud suction pipe 6, the mud is filtered and processed into an impurity layer and a water layer. The filtered water layer can be directly discharged into the waterway, or the mud and water can be further separated so that the separated water can be discharged into the waterway. The specific filtering and separation components can be the equipment in the prior art, as long as they can achieve the above functions, and this embodiment will not make any specific restrictions on this.

[0022] In one specific embodiment, the channel dredging device further includes a second support assembly 9, which includes: A first support rod 900, which is horizontally arranged and has one end fixedly connected to the outer fixing tube 300; A second support rod 901, which is vertically and rotatably arranged on the deck of the hull 1, and the second support rod 901 is fixedly connected to the other end of the first support rod 900; wherein a driven bevel gear 905 is arranged on the second support rod 901; A second driving motor 904 is disposed on the deck of the hull 1. An active bevel gear 906 is disposed at the end of the horizontal driving shaft of the second driving motor 904. The active bevel gear 906 meshes with the driven bevel gear 905 to drive the second support rod 901 to rotate, thereby driving the first support rod 900, the outer fixed cylinder 300, the first rotating shaft 301 and the rotating crushing assembly 2 to rotate with the second support rod 901 as the rotation center; The third support rod 902 is vertically arranged, and the upper end of the third support rod 902 is fixedly connected to the middle position of the first support rod 900, and the lower end is slidably arranged on an arc-shaped slide 10 located on the deck of the hull 1.

[0023] In the above embodiment, the second support assembly 9 is provided to enable the rotating crushing assembly 2 to rotate along the stern of the hull 1 within a certain arc range while rotating, which greatly improves the scope and efficiency of dredging. The meshing connection between the active bevel gear 906 and the driven bevel gear 905 realizes the rotation of the second support rod 901. Since the first support rod 900 is fixedly connected to the second support rod 901, the first support rod 900 is driven to rotate, so that the outer fixed cylinder 300, the first rotating shaft 301 and the rotating crushing assembly 2 all rotate with the second support rod 901 as the rotation center. The third support rod 902 is provided to support the first support rod 900 and to slide on the arc slide 10 with the first support rod 900 when the first support rod 900 rotates, further improving the stability of the second support assembly 9. In the specific setting, the lower end of the third support rod 902 is adapted to the arc slide 10.

[0024] In one specific embodiment, the channel dredging device further includes a lifting component, which is fixedly disposed on the deck of the hull 1, the second drive motor 904 is fixedly disposed on the upper surface of the lifting component, and the second support rod 901 is rotatably disposed on the upper surface of the lifting component.

[0025] In the above embodiment, during specific implementation, the lifting component may include a base plate 12 with an L-shaped cross-section and a driving cylinder 11 arranged under the base plate 12, and the driving cylinder 11 is preferably a multi-stage telescopic cylinder. Since the components that the lifting component needs to lift are relatively heavy as a whole, a plurality of driving cylinders 11 can be arranged under the base plate 12, distributed in different positions, and the driving cylinder 11 can also be replaced by other retractable driving mechanisms. The main purpose of setting up the lifting component is that when dredging is not carried out, the rotating crushing assembly 2 can be raised to the bottom surface of the hull 1 to facilitate the travel of the hull 1. The lifting component can also clean up silt of different depths by adjusting the height of the rotating crushing assembly 2. It should also be noted that, in order to enable the rotating crushing assembly 2 to clean sludge at different depths, the third support rod 902 can support the first support rod 900, and the height of the arc slide 10 arranged at the lower end of the third support rod 902 also needs to be adjusted. Therefore, in the specific setting, a lifting component can also be arranged below the arc slide 10, or the third support rod 902 can be arranged as a telescopic rod. By way of example, the third support rod 902 is composed of an upper rod body and a lower rod body, an adjusting bolt is arranged between the upper rod body and the lower rod body, and threads matching the bolt are arranged inside the lower end portion of the upper rod body and the upper end portion of the lower rod body.

[0026] In one specific embodiment, the waterway dredging device, the first rotating shaft 301 is rotatably arranged inside the outer fixed cylinder 300, specifically comprising: a plurality of bearings 4 are fixedly arranged on the inner wall of the outer fixed cylinder 300, and the first rotating shaft 301 is arranged inside the bearings 4. The arrangement of the bearings 4 not only enables the first rotating shaft 301 to rotate inside the outer fixed cylinder 300, but also facilitates the installation of the first rotating shaft 301.

[0027] In one specific embodiment, in the waterway dredging device, each of the secondary gear rotating plates 201 is arranged around the main gear rotating plate 200, and the specific arrangement method is: The annular plate 15 is horizontally fixedly sleeved on the circumference of the bottom end of the outer fixed cylinder 300, wherein a plurality of first through holes are provided on the annular plate 15, and the number of the first through holes is the same as the number of the sub-gear rotating plate 201; A plurality of second rotating shafts 16 are vertically arranged, the lower end of each second rotating shaft 16 is fixedly connected to the center of the sub-gear rotating plate 201, and the upper end thereof passes through one of the first through holes; The annular baffle includes an upper baffle 17 and a lower baffle 18. The upper baffle 17 and the lower baffle 18 are fixedly sleeved on the upper end of each second rotating shaft 16, and the spacing between the upper baffle 17 and the lower baffle 18 is adapted to the thickness of the annular plate 15, so that the upper baffle 17 is located above the annular plate 15, and the lower baffle 18 is located below the annular plate 15.

[0028] In the above embodiment, the upper baffle plate 17 and the lower baffle plate 18 are provided to limit the upper end of the second rotating shaft 16, thereby limiting the position of the secondary gear rotating plate 201 so that it will not separate from the primary gear rotating plate 200, and will not affect the rotation of the second rotating shaft 16. In the specific setting, the surfaces of the upper baffle plate 17, the lower baffle plate 18 and the annular plate 15 are as smooth as possible. For example, the upper baffle plate 17 and the lower baffle plate 18 are fixed to the second rotating shaft 16 by nuts, or welded to the second rotating shaft 16. The diameter of the first through hole is adapted to the diameter of the second rotating shaft 16.

[0029] In one specific embodiment, the waterway dredging device, the second support rod 901 is rotatably arranged on the upper surface of the lifting component, and the specific arrangement is as follows: a bearing seat 14 is fixedly arranged on the upper surface of the lifting component, and the lower end of the second support rod 901 is arranged inside the bearing seat 14, wherein a plurality of downwardly inclined tilting rods 14 are arranged at equal intervals on the circumference of the second support rod 901, and an annular slide is arranged on the upper surface of the lifting component and around the bearing seat 14, and the lower ends of a plurality of tilting rods 14 are slidably arranged on the annular slide. The arrangement of the tilting rod 14 can support the second support rod 901 and will not affect the rotation of the second support rod 901. In the specific arrangement, the tilting rod 14 is arranged below the driven bevel gear 905.

[0030] In one specific embodiment, the channel dredging device further includes a fixing plate 20, one side of which is fixed on the surface of the outer fixing tube 300, and a second through hole is set on the fixing plate 20, and the lower end of the mud suction pipe 6 passes through the second through hole, and the mud suction pipe 6 is fixed on the fixing plate 20, so that the mud suction pipe 6 can absorb mud. In the specific setting, the fixing plate 20 is set above the annular plate 15. The fixing plate 20 can be used to fix the lower end of the mud suction pipe 6, and can also make the lower end of the mud suction pipe 6 rotate together with the rotating crushing assembly 2 when rotating around the tail of the hull 1, so as to suck the crushed and stirred mud into the mud bin 7 in time. It should be noted that since the mud suction pipe 6 will rotate around the tail of the hull 1 together with the rotating crushing assembly 2, therefore, in the specific setting, the mud suction pipe 6 can be first fixed at a certain place at the tail of the hull 1, and then the mud suction pipe 6 can be passed through the second through hole, and the length of the mud suction pipe 6 is specifically set according to the actual situation.

[0031] Another embodiment of the present invention further provides a waterway dredging construction method, which is applied to the waterway dredging device, and comprises the following steps: S1, driving the ship 1 to the location where the channel silt is to be dredged; S2, start the lifting component to move the first support assembly 3, the second support assembly 9 and the rotary crushing assembly 2 downward, so that the lower end of the rotary crushing assembly 2 and the mud suction pipe 6 are located at the mud position to be dredged; S3, turning on the first driving motor 5 to rotate the first rotating shaft 301, driving the rotating crushing assembly 2 to rotate, and crushing the sludge and weeds; S4, turning on the second driving motor 904 to drive the second support rod 901 to rotate, thereby driving the first support rod 900, the outer fixed cylinder 300, the first rotating shaft 301 and the rotating crushing assembly 2 to rotate with the second support rod 901 as the rotation center; S5, start the mud pump 8, and suck the crushed and stirred mud into the mud bin 7 through the mud suction pipe 6.

[0032] Through the method of the above embodiment, it is achieved that the rotary crushing assembly 2 can rotate along the tail of the hull 1 within a certain arc range while rotating on its own, which greatly improves the scope and efficiency of dredging.

[0033] The number of devices and processing scales described here are used to simplify the description of the present invention. Applications, modifications and variations of the present invention will be obvious to those skilled in the art.

[0034] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A channel dredging device, characterized in that: include: hull; The rotary crushing assembly comprises: a main gear rotating plate, which is arranged horizontally; a plurality of sub-gear rotating plates, which are arranged horizontally, each of which is arranged around the main gear rotating plate and meshed with the main gear rotating plate; wherein crushing blades are arranged on the bottom surfaces of the main gear rotating plate and the sub-gear rotating plate; The first support assembly comprises: an outer fixed cylinder, which is hollow inside and vertically arranged at the tail of the hull; a first rotating shaft, which is rotatably arranged inside the outer fixed cylinder, the lower end of the first rotating shaft is exposed from the bottom end of the outer fixed cylinder and is fixedly connected to the center of the main gear rotating plate; wherein a first driving motor is arranged above the outer fixed cylinder, and the driving shaft of the first driving motor is fixedly connected to the upper end of the first rotating shaft; A mud suction pipe, which is arranged on one side of the rotary crushing assembly; A mud bin is arranged on the hull and is communicated with the mud suction pipe, and a mud pump is arranged on the mud suction pipe.

2. The channel dredging device according to claim 1, characterized in that: Also included is a second support assembly comprising: A first support rod, which is arranged horizontally and has one end fixedly connected to the outer fixing tube; a second support rod, which is vertically and rotatably arranged on the deck of the hull, and the second support rod is fixedly connected to the other end of the first support rod; wherein a driven bevel gear is arranged on the second support rod; a second driving motor, which is arranged on the deck of the hull, and an active bevel gear is arranged at the end of the horizontal driving shaft of the second driving motor, and the active bevel gear is meshed with the driven bevel gear to drive the second support rod to rotate, thereby driving the first support rod, the outer fixed cylinder, the first rotating shaft and the rotating crushing assembly to rotate with the second support rod as the rotation center; The third support rod is vertically arranged, the upper end of the third support rod is fixedly connected to the middle position of the first support rod, and the lower end of the third support rod is slidably arranged on an arc-shaped slideway located on the hull deck.

3. The channel dredging device according to claim 2, characterized in that: It also includes a lifting component, which is fixedly arranged on the deck of the hull, the second driving motor is fixedly arranged on the upper surface of the lifting component, and the second supporting rod is rotatably arranged on the upper surface of the lifting component.

4. The channel dredging device according to claim 1, characterized in that: The first rotating shaft is rotatably arranged inside the outer fixed cylinder, and specifically comprises: a plurality of bearings are fixedly arranged on the inner wall of the outer fixed cylinder, and the first rotating shaft is arranged inside the bearings.

5. The channel dredging device according to claim 1, characterized in that: Each of the secondary gear rotating plates is arranged around the primary gear rotating plate, and the specific arrangement is as follows: An annular plate, which is horizontally fixedly sleeved on the circumference of the bottom end of the outer fixed cylinder, wherein a plurality of first through holes are provided on the annular plate, and the number of the first through holes is the same as the number of the auxiliary gear rotating plate; A plurality of second rotating shafts are vertically arranged, the lower end of each second rotating shaft is fixedly connected to the center position of one of the sub-gear rotating plates, and the upper end thereof passes through one of the first through holes; The annular baffle comprises an upper baffle and a lower baffle, and the upper baffle and the lower baffle are fixedly sleeved on the upper end of each second rotating shaft, and the spacing between the upper baffle and the lower baffle is adapted to the thickness of the annular plate, so that the upper baffle is located above the annular plate, and the lower baffle is located below the annular plate.

6. The channel dredging device according to claim 3, characterized in that: The second support rod is rotatably arranged on the upper surface of the lifting component, and the specific arrangement method is: a bearing seat is fixedly arranged on the upper surface of the lifting component, and the lower end of the second support rod is arranged inside the bearing seat, wherein a plurality of downwardly inclined inclined rods are arranged at equal intervals on the circumference of the second support rod, and an annular slide is arranged on the upper surface of the lifting component and around the bearing seat, and the lower ends of the plurality of inclined rods are slidably arranged on the annular slide.

7. The channel dredging device according to claim 1, characterized in that: It also includes a fixing plate, one side of which is fixed on the surface of the outer fixing tube. A second through hole is arranged on the fixing plate. The lower end of the mud suction pipe passes through the second through hole and the mud suction pipe is fixed on the fixing plate to facilitate the mud suction pipe to absorb mud.

8. A waterway dredging construction method, applied to the waterway dredging device according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Drive the ship to the location where the channel silt is to be dredged; S2, start the lifting component to move the first support assembly, the second support assembly and the rotary crushing assembly downward, so that the rotary crushing assembly and the lower end of the sludge suction pipe are located at the sludge position to be dredged; S3, turning on the first driving motor to rotate the first rotating shaft, driving the rotating crushing assembly to rotate, and crushing the sludge and weeds; S4, turning on the second driving motor to drive the second support rod to rotate, thereby driving the first support rod, the outer fixed cylinder, the first rotating shaft and the rotating crushing assembly to rotate with the second support rod as the rotation center; S5. Turn on the mud pump and suck the crushed and stirred mud into the mud bin through the mud suction pipe.

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