Channel dredging device and construction method

Abstract

Disclosed in the present invention is a channel dredging device, comprising: a hull; a rotating crushing assembly comprising a primary gear rotating plate, secondary gear rotating plates meshing with the primary gear rotating plate, and crushing blades; a first support assembly comprising an outer fixed cylinder and a first rotating shaft arranged therein, the lower end of the first rotating shaft being fixedly connected to the center of the primary gear rotating plate; a mud tank in communication with a mud suction pipe; a first support rod having one end fixedly connected to the outer fixed cylinder, and the other end fixedly connected to a second support rod; the second support rod being rotatably arranged on the hull, wherein a driven bevel gear is provided on the second support rod, and a driving bevel gear is provided at an end of a drive shaft of a second drive motor; and a third support rod having one end fixedly connected to an intermediate position of the first support rod, and the other end slidably arranged on an arc-shaped slideway. Further provided is a construction method for dredging a channel. According to the device and the method, the rotating crushing assembly can rotate along the tail of the hull within a certain radian range while rotating about its own axis, thereby greatly improving the silt removal range and efficiency.

Description

Channel dredging equipment and construction methods Technical Field

[0001] This invention relates to the field of waterway dredging. More specifically, this invention relates to a waterway dredging apparatus and construction method. Background Technology

[0002] Dredging is the process of removing underwater silt and sand from waterways using dredgers or other tools. It is one of the main methods for developing waterways and increasing and maintaining their dimensions. Ancient dredging methods involved people on boats using long-handled scoops to remove silt and sand from the water. Since the advent of steam-powered dredgers, dredging equipment has developed rapidly. Current waterway dredging and silt removal equipment typically involves inserting suction pipes into the silt to remove the sediment from the bottom. However, because silt often contains large amounts of mud, sand, weeds, and other impurities, and in some places, large rocks, incomplete silt removal is easily achieved. If weeds or large rocks are sucked into the suction pipes or equipment, it can cause blockages and damage to the equipment. Summary of the Invention

[0003] This invention provides a channel dredging device and construction method, which can crush and mix mud clumps, stones or weeds, and then suck the slurry into the mud bin, improving the thoroughness of dredging. The rotating crushing component can not only rotate on its own to crush and mix, but also rotate around the stern of the ship within a certain arc range, which greatly increases the dredging range and also improves the dredging efficiency.

[0004] To achieve these objectives and other advantages of the present invention, in a first aspect, the present invention provides a channel dredging apparatus, comprising:

[0005] hull;

[0006] A rotary crushing assembly includes: a main gear rotating plate, which is horizontally arranged; and multiple auxiliary gear rotating plates, which are horizontally arranged, each auxiliary gear rotating plate being arranged around the main gear rotating plate and meshing with the main gear rotating plate; wherein crushing blades are provided on the bottom surface of both the main gear rotating plate and the auxiliary gear rotating plate.

[0007] The first support assembly includes: an outer fixed cylinder, which is hollow inside and vertically disposed at the stern of the hull; a first rotating shaft, which is rotatably disposed inside the outer fixed cylinder, the lower end of the first rotating shaft protruding from the bottom end of the outer fixed cylinder and fixedly connected to the center of the main gear rotating plate; wherein, a first drive motor is disposed above the outer fixed cylinder, and the drive shaft of the first drive motor is fixedly connected to the upper end of the first rotating shaft.

[0008] A suction pipe is disposed on one side of the rotary crushing assembly;

[0009] A mud bin is installed on the hull and connected to the mud suction pipe, on which a mud pump is installed.

[0010] Preferably, the channel dredging device further includes a second support assembly, which comprises:

[0011] The first support rod is horizontally positioned, with one end fixedly connected to the outer fixing cylinder;

[0012] The second support rod is vertically and rotatably mounted on the deck of the hull, and the other end of the second support rod is fixedly connected to the other end of the first support rod; wherein, a driven bevel gear is provided on the second support rod;

[0013] The second drive motor is mounted on the deck of the hull. A drive bevel gear is mounted at the end of the horizontal drive shaft of the second drive motor. The drive bevel gear meshes with the driven bevel gear and drives the second support rod to rotate, thereby causing the first support rod, the outer fixed cylinder, the first rotating shaft and the rotating crushing assembly to rotate around the second support rod as the rotation center.

[0014] 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 is slidably arranged on an arc-shaped slide on the deck of the ship.

[0015] Preferably, the channel dredging device further includes a lifting component, which is fixedly mounted on the deck of the hull, the second drive motor is fixedly mounted on the upper surface of the lifting component, and the second support rod is rotatably mounted on the upper surface of the lifting component.

[0016] Preferably, in the aforementioned channel dredging device, the first rotating shaft is rotatably disposed inside the outer fixed cylinder, specifically comprising: multiple bearings fixedly disposed on the inner wall of the outer fixed cylinder, and the first rotating shaft disposed inside the bearings.

[0017] Preferably, in the aforementioned channel dredging device, each auxiliary gear rotating plate is disposed around the main gear rotating plate, specifically in the following manner:

[0018] An annular plate is horizontally fixedly sleeved around the bottom end circumference of the outer fixed cylinder. The annular plate has a plurality of first through holes, the number of which is the same as the number of the auxiliary gear rotating plate.

[0019] The second rotating shaft has multiple vertically arranged shafts. The lower end of each second rotating shaft is fixedly connected to the center position of a secondary gear rotating plate, and the upper end of each shaft passes through a first through hole.

[0020] An annular baffle includes an upper baffle and a lower baffle. The upper baffle and the lower baffle are fixedly sleeved on the upper end of each second rotating shaft. The distance 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.

[0021] Preferably, in the aforementioned channel dredging device, the second support rod is rotatably mounted on the upper surface of the lifting component. Specifically, a bearing seat is fixedly mounted on the upper surface of the lifting component, and the lower end of the second support rod is disposed inside the bearing seat. A plurality of downwardly inclined rods are evenly spaced around the circumference of the second support rod. An annular slide is provided 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 mounted on the annular slide.

[0022] Preferably, the channel dredging device further includes a fixing plate, one side of which is fixed to the surface of the outer fixing cylinder. A second through hole is provided on the fixing plate, and the lower end of the suction pipe passes through the second through hole and is fixed on the fixing plate to facilitate the suction pipe to draw in mud.

[0023] Secondly, the present invention also provides a channel dredging construction method, applied to the aforementioned channel dredging device, comprising the following steps:

[0024] S1. Proceed the vessel to the location where the silt in the waterway needs to be dredged.

[0025] S2. Activate the lifting component to move the first support assembly, the second support assembly, and the rotary crushing assembly downwards, so that the rotary crushing assembly and the lower end of the suction pipe are located at the position of the silt to be dredged.

[0026] S3. Turn on the first drive motor to make the first rotating shaft rotate, which drives the rotating crushing component to rotate and crush the silt clumps and weeds.

[0027] S4. Turn on the second drive motor to drive the second support rod to rotate, thereby causing the first support rod, the outer fixed cylinder, the first rotating shaft and the rotating crushing assembly to rotate around the second support rod as the rotation center.

[0028] S5. Turn on the mud pump and suck the crushed and mixed mud into the mud bin through the suction pipe.

[0029] The present invention has at least the following beneficial effects:

[0030] First, because the rotary crushing assembly of this invention includes a main gear rotating plate, multiple auxiliary gear rotating plates, and crushing blades, it can improve both the crushing range and the fineness of the crushing, and also facilitates the suction pipe's intake. The first support assembly includes an outer fixed cylinder and a first rotating shaft. The outer fixed cylinder facilitates the mounting of the rotary crushing assembly on the hull, while the first rotating shaft and the first drive motor can drive the rotary crushing assembly to rotate for stirring and crushing.

[0031] Secondly, since the second support component of the present invention includes a first support rod for fixing the outer fixed cylinder, a second support rod for fixing the first support rod, a second drive motor for driving the second support rod to rotate, and a third support rod for stabilizing the first support rod during rotation, the second support component enables the rotating crushing component to rotate along the stern of the hull within a certain arc range while rotating on its own axis, greatly improving the scope and efficiency of dredging.

[0032] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0033] Figure 1 is a side view of the channel dredging device of the present invention;

[0034] Figure 2 is a top view of the arc-shaped slide in the channel dredging device of the present invention;

[0035] Figure 3 is a schematic diagram of the structural relationship of the rotary crushing component in the channel dredging device of the present invention. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0037] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0038] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are conventional methods, and the reagents and materials mentioned are commercially available. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to fixed connection or setting, detachable connection or setting, or integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0039] As shown in Figures 1 to 3, this embodiment of the invention provides a channel dredging device, comprising: a hull 1; a rotary crushing assembly 2, which includes: a main gear rotating plate 200, which is horizontally arranged; multiple auxiliary gear rotating plates 201, which are horizontally arranged, each auxiliary gear rotating plate 201 being disposed around the main gear rotating plate 200 and meshing with the main gear rotating plate 200; wherein crushing blades 202 are provided on the bottom surfaces of both the main gear rotating plate 200 and the auxiliary gear rotating plates 201; and a first support assembly 3, which includes: an outer fixing cylinder 300, which is hollow inside and vertically arranged on the hull 1. Tail section; a first rotating shaft 301, which is rotatably disposed inside the outer fixed cylinder 300, the lower end of the first rotating shaft 301 protruding from the bottom end of the outer fixed cylinder 300 and fixedly connected to the center of the main gear rotating plate 200; wherein, a first drive motor 5 is disposed above the outer fixed cylinder 300, and the drive shaft of the first drive motor 5 is fixedly connected to the upper end of the first rotating shaft 301; a mud suction pipe 6, which is disposed on one side of the rotating crushing assembly 2; a mud bin 7, which is disposed on the hull 1 and communicates with the mud suction pipe 6, and a mud pump 8 is disposed on the mud suction pipe 6.

[0040] In the above embodiment, specifically, 3 to 5 auxiliary gear rotating plates 201 can be arranged around the main gear rotating plate 200. The outer diameter of the auxiliary gear rotating plates 201 is smaller than that of the main gear rotating plate 200. The auxiliary gear rotating plates 201 are meshed with the main gear rotating plate 200. By driving the main gear rotating plate 200, all the auxiliary gear rotating plates 201 can rotate, which improves the crushing and mixing range to a certain extent. In addition, after the main gear rotating plate 200 crushes the mud clumps, weeds, or stones in the silt, the crushed silt slurry is thrown to the vicinity of the circumference due to the rotation of the main gear rotating plate 200. Since the auxiliary gear rotating plates 201 are arranged around the main gear rotating plate 200, the slurry crushed by the main gear rotating plate 200 will be crushed and mixed again by the auxiliary gear rotating plates 201, which also improves the crushing accuracy to a certain extent and makes the suction pipe 6 more efficient. The crushing blade 202 can be S-shaped or spiral-shaped. For the first drive motor 5 installed above the outer fixing cylinder 300, in order to facilitate the fixing of the first drive motor 5, a horizontal plate can be provided at the upper end of the outer fixing cylinder 300. The first drive motor 5 is fixed on the horizontal plate, and the drive shaft of the first drive motor 5 passes through the horizontal plate and is fixedly connected to the first rotating shaft 301. In order to prevent excessive mud and water from entering the outer fixing cylinder 300, a cover 19 is provided at the bottom end of the outer fixing cylinder 300, and the lower end of the first rotating shaft 301 passes through the cover 19 and protrudes from the outer fixing cylinder 300.

[0041] It should be noted that, in specific implementation, a filter layer can also be installed in the mud bin 7. After the mud slurry enters the mud bin 7 through the suction pipe 6, it undergoes filtration to separate the mud slurry into an impurity layer and a water layer. The filtered water layer can be directly discharged into the waterway, or it can undergo further mud-water separation before the separated water is discharged into the waterway. The specific filtration and separation components can use existing equipment, as long as they can achieve the above functions; this embodiment does not impose specific limitations on them.

[0042] In one specific embodiment, the channel dredging device further includes a second support component 9, which comprises:

[0043] The first support rod 900 is horizontally positioned, and one end is fixedly connected to the outer fixing cylinder 300;

[0044] The second support rod 901 is vertically and rotatably mounted on the deck of the hull 1, and the other end of the second support rod 901 is fixedly connected to the first support rod 900; wherein, a driven bevel gear 905 is provided on the second support rod 901;

[0045] The second drive motor 904 is mounted on the deck of the hull 1. A drive bevel gear 906 is mounted at the end of the horizontal drive shaft of the second drive motor 904. The drive bevel gear 906 meshes with the driven bevel gear 905 to drive the second support rod 901 to rotate, thereby causing the first support rod 900, the outer fixed cylinder 300, the first rotating shaft 301, and the rotating crushing assembly 2 to rotate around the second support rod 901 as the rotation center.

[0046] The third support rod 902 is vertically arranged. 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 rail 10 located on the deck of the hull 1.

[0047] In the above embodiment, the second support component 9 enables the rotary crushing component 2 to rotate along the stern of the hull 1 within a certain arc range while rotating on its own axis, greatly improving the dredging range and efficiency. The meshing connection between the driving bevel gear 906 and the driven bevel gear 905 enables the rotation of the second support rod 901. Since the first support rod 900 is fixedly connected to the second support rod 901, it also drives the first support rod 900 to rotate, thereby causing the outer fixed cylinder 300, the first rotating shaft 301, and the rotary crushing component 2 to rotate around the second support rod 901 as the rotation center. The third support rod 902 not only supports the first support rod 900, but also slides on the arc-shaped slide rail 10 along with the first support rod 900 when it rotates, further improving the stability of the second support component 9. Specifically, the lower end of the third support rod 902 is adapted to the arc-shaped slide rail 10.

[0048] In one specific embodiment, the channel dredging device further includes a lifting component, which is fixedly mounted on the deck of the hull 1, the second drive motor 904 is fixedly mounted on the upper surface of the lifting component, and the second support rod 901 is rotatably mounted on the upper surface of the lifting component.

[0049] In the above embodiments, the lifting component may include an L-shaped base plate 12 and a drive cylinder 11 disposed below the base plate 12. The drive cylinder 11 is preferably a multi-stage telescopic cylinder. Since the components to be lifted by the lifting component are relatively heavy, multiple drive cylinders 11 can be disposed below the base plate 12, distributed in different positions. Alternatively, the drive cylinders 11 can be replaced with other telescopic drive mechanisms. The main purpose of the lifting component is to allow the rotary crushing assembly 2 to rise to the bottom of the hull 1 when dredging work is not being performed, facilitating the movement of the hull 1. The lifting component can also clean sludge of different depths by adjusting the height of the rotary crushing assembly 2. It should also be noted that, in order for the rotary crushing assembly 2 to be able to clean sludge of different depths, the third support rod 902 can support the first support rod 900. The height of the arc-shaped slide 10 located at the lower end of the third support rod 902 also needs to be adjusted. Therefore, in specific settings, a lifting component can also be set below the arc-shaped slide 10, or the third support rod 902 can be set as a telescopic rod. For example, the third support rod 902 is composed of an upper rod body and a lower rod body. An adjusting bolt is set between the upper rod body and the lower rod body. Threads adapted to the bolt are provided inside the lower end of the upper rod body and inside the upper end of the lower rod body.

[0050] In one specific embodiment, the channel dredging device has a first rotating shaft 301 rotatably disposed inside the outer fixed cylinder 300. Specifically, this includes: multiple bearings 4 fixedly disposed on the inner wall of the outer fixed cylinder 300, with the first rotating shaft 301 disposed inside the bearings 4. The bearings 4 not only enable the first rotating shaft 301 to rotate within the outer fixed cylinder 300 but also facilitate the installation of the first rotating shaft 301.

[0051] In one specific embodiment, in the channel dredging device, each auxiliary gear rotating plate 201 is disposed around the main gear rotating plate 200, specifically in the following manner:

[0052] An annular plate 15 is horizontally fixedly sleeved around the bottom end circumference of the outer fixed cylinder 300. The annular plate 15 is provided with a plurality of first through holes, the number of which is the same as the number of the auxiliary gear rotating plate 201.

[0053] The second rotating shaft 16 has multiple vertically arranged shafts. The lower end of each second rotating shaft 16 is fixedly connected to the center position of a secondary gear rotating plate 201, and the upper end of each shaft passes through a first through hole.

[0054] An 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 of the second rotating shafts 16. The distance 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.

[0055] In the above embodiment, the upper baffle 17 and the lower baffle 18 not only limit the upper end of the second rotating shaft 16, thereby limiting the position of the auxiliary gear rotating plate 201 to prevent it from detaching from the main gear rotating plate 200, but also do not affect the rotation of the second rotating shaft 16. Specifically, the surfaces of the upper baffle 17, the lower baffle 18, and the annular plate 15 are made as smooth as possible. For example, the upper baffle 17 and the lower baffle 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 matched to the diameter of the second rotating shaft 16.

[0056] In one specific embodiment, the channel dredging device has a second support rod 901 rotatably mounted on the upper surface of the lifting component. Specifically, a bearing seat 14 is fixedly mounted on the upper surface of the lifting component, and the lower end of the second support rod 901 is disposed within the bearing seat 14. Multiple downwardly inclined rods 14 are evenly spaced around the circumference of the second support rod 901. An annular slide rail is provided on the upper surface of the lifting component and around the bearing seat 14, with the lower ends of the multiple inclined rods 14 slidably mounted on the annular slide rail. The inclined rods 14 support the second support rod 901 without affecting its rotation. Specifically, the inclined rods 14 are positioned below the driven bevel gear 905.

[0057] In one specific embodiment, the channel dredging device further includes a fixing plate 20, one side of which is fixed to the surface of the outer fixing cylinder 300. A second through hole is provided on the fixing plate 20, through which the lower end of the suction pipe 6 passes, and the suction pipe 6 is fixed to the fixing plate 20 to facilitate the suction pipe 6 in drawing mud. Specifically, the fixing plate 20 is positioned above the annular plate 15. The fixing plate 20 can be used to fix the lower end of the suction pipe 6, and can also allow the lower end of the suction pipe 6 to rotate together with the rotating crushing assembly 2 as it rotates around the stern of the hull 1, so as to promptly draw the crushed and mixed mud into the mud bin 7. It should be noted that since the suction pipe 6 will rotate around the stern of the hull 1 along with the rotating crushing assembly 2, in a specific configuration, the suction pipe 6 can be fixed at a certain point on the stern of the hull 1 first, and then the suction pipe 6 can be passed through the second through hole. The length of the suction pipe 6 can be specifically set according to the actual situation.

[0058] Another embodiment of the present invention provides a channel dredging construction method, applied to the aforementioned channel dredging device, comprising the following steps:

[0059] S1. Proceed hull 1 to the location where the silt in the waterway needs to be dredged;

[0060] S2. Activate 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 suction pipe 6 are located at the position of the silt to be dredged.

[0061] S3. Turn on the first drive motor 5 to make the first rotating shaft 301 rotate, which drives the rotating crushing component 2 to rotate and crush the silt and weeds.

[0062] S4. Turn on the second drive motor 904 to drive the second support rod 901 to rotate, thereby causing the first support rod 900, the outer fixed cylinder 300, the first rotating shaft 301 and the rotating crushing assembly 2 to rotate around the second support rod 901 as the rotation center.

[0063] S5. Start the mud pump 8 and suck the crushed and mixed mud into the mud bin 7 through the mud suction pipe 6.

[0064] The method described in the above embodiments enables the rotary crushing component 2 to rotate along the stern of the hull 1 within a certain arc range while rotating on its own axis, greatly improving the scope and efficiency of dredging.

[0065] The number of devices and processing scale described herein are for the purpose of simplifying the description of the invention. Applications, modifications, and variations of the invention will be readily apparent to those skilled in the art.

[0066] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A waterway dredging device, characterized in that, include: hull; A rotary crushing assembly includes: a main gear rotating plate, which is horizontally arranged; and multiple auxiliary gear rotating plates, which are horizontally arranged, each auxiliary gear rotating plate being arranged around the main gear rotating plate and meshing with the main gear rotating plate; wherein crushing blades are provided on the bottom surface of both the main gear rotating plate and the auxiliary gear rotating plate. The first support assembly includes: an outer fixed cylinder, which is hollow inside and vertically disposed at the stern of the hull; a first rotating shaft, which is rotatably disposed inside the outer fixed cylinder, the lower end of the first rotating shaft protruding from the bottom end of the outer fixed cylinder and fixedly connected to the center of the main gear rotating plate; wherein, a first drive motor is disposed above the outer fixed cylinder, and the drive shaft of the first drive motor is fixedly connected to the upper end of the first rotating shaft. A suction pipe is disposed on one side of the rotary crushing assembly; A mud bin is installed on the hull and connected to the mud suction pipe, on which a mud pump is installed.

2. A channel dredging device as claimed in claim 1, characterized in that It also includes a second support component, which comprises: The first support rod is horizontally positioned, with one end fixedly connected to the outer fixing cylinder; The second support rod is vertically and rotatably mounted on the deck of the hull, and the other end of the second support rod is fixedly connected to the other end of the first support rod; wherein, a driven bevel gear is provided on the second support rod; The second drive motor is mounted on the deck of the hull. A drive bevel gear is mounted at the end of the horizontal drive shaft of the second drive motor. The drive bevel gear meshes with the driven bevel gear and drives the second support rod to rotate, thereby causing the first support rod, the outer fixed cylinder, the first rotating shaft and the rotating crushing assembly to rotate around 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 is slidably arranged on an arc-shaped slide on the deck of the ship.

3. A channel dredging device as claimed in claim 2, characterized in that It also includes a lifting component, which is fixedly mounted on the deck of the hull, the second drive motor is fixedly mounted on the upper surface of the lifting component, and the second support rod is rotatably mounted on the upper surface of the lifting component.

4. A channel dredging device as claimed in claim 1, characterized in that The first rotating shaft is rotatably disposed inside the outer fixed cylinder, specifically including: multiple bearings are fixedly disposed on the inner wall of the outer fixed cylinder, and the first rotating shaft is disposed inside the bearings.

5. A channel dredging device as claimed in claim 1, characterized in that Each of the auxiliary gear rotating plates is disposed around the main gear rotating plate, specifically as follows: An annular plate is horizontally fixedly sleeved around the bottom end circumference of the outer fixed cylinder. The annular plate has a plurality of first through holes, the number of which is the same as the number of the auxiliary gear rotating plate. The second rotating shaft has multiple vertically arranged shafts. The lower end of each second rotating shaft is fixedly connected to the center position of a secondary gear rotating plate, and the upper end of each shaft passes through a first through hole. An annular baffle includes an upper baffle and a lower baffle. The upper baffle and the lower baffle are fixedly sleeved on the upper end of each second rotating shaft. The distance 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. A channel dredging device as claimed in claim 3, characterized in that The second support rod is rotatably mounted on the upper surface of the lifting component. Specifically, a bearing seat is fixedly mounted on the upper surface of the lifting component, and the lower end of the second support rod is located inside the bearing seat. Multiple downwardly inclined rods are evenly spaced around the circumference of the second support rod. An annular slide is mounted on the upper surface of the lifting component and around the bearing seat, and the lower ends of the multiple inclined rods are slidably mounted on the annular slide.

7. A channel dredging device as claimed in claim 1, characterized in that It also includes a fixing plate, one side of which is fixed to the surface of the outer fixing cylinder. A second through hole is provided on the fixing plate. The lower end of the suction pipe passes through the second through hole and is fixed on the fixing plate to facilitate the suction pipe to draw up mud.

8. A method of channel dredging construction applied to the channel dredging device according to any one of claims 1 to 7, characterized in that, Includes the following steps: S1. Proceed the vessel to the location where the silt in the waterway needs to be dredged. S2. Activate the lifting component to move the first support assembly, the second support assembly, and the rotary crushing assembly downwards, so that the rotary crushing assembly and the lower end of the suction pipe are located at the position of the silt to be dredged. S3. Turn on the first drive motor to make the first rotating shaft rotate, which drives the rotating crushing component to rotate and crush the silt clumps and weeds. S4. Turn on the second drive motor to drive the second support rod to rotate, thereby causing the first support rod, the outer fixed cylinder, the first rotating shaft and the rotating crushing assembly to rotate around the second support rod as the rotation center. S5. Turn on the mud pump and suck the crushed and mixed mud into the mud bin through the suction pipe.

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