River channel desilting device and river channel desilting method

Abstract

The invention discloses a river channel dredging device and a river channel dredging method. The river channel dredging device comprises a dredging ship body, a silt suction frame is installed at the tail of the dredging ship body, and a silt suction pipe is arranged on the lower portion of the silt suction frame; a crushing assembly is installed at the lower end of the silt suction pipe. The upper end of the silt suction pipe communicates with a silt removing box arranged on the silt removing ship body, and the silt removing box communicates with a silt treatment box. The crushing assembly comprises a protective cover, a fixed gear is arranged in the protective cover, and the fixed gear is fixed to the end of the silt suction pipe; the autorotation gear and the rotary hanging bracket are mounted on the gear mounting part of the silt suction pipe; rotating shafts are mounted on the rotating hangers; revolution gears are fixed to the upper ends of the rotating shafts, and crushing hinge pieces are installed on the lower portions of the rotating shafts. The crushing assembly is arranged at the lower end of the silt suction pipe, in the silt suction process, the crushing motor drives the crushing hinge piece to achieve composite motion of rotation and revolution, sucked silt and impurities can be crushed and cut, and therefore the problem that an inlet of the silt suction pipe or a silt suction pump is blocked due to large impurities or caked mud is effectively solved.

Description

Technical Field

[0001] This invention belongs to the technical field of river cleaning equipment, and in particular relates to a river dredging device and a river dredging method. Background Technology

[0002] River dredging is an important component of water conservancy project construction and management. Its main purpose is to restore the original water conveyance capacity of rivers by removing deposited silt and debris, thereby ensuring the normal functioning of various functions such as flood control, drainage, irrigation, water supply, and navigation. With the continuous acceleration of urbanization and the increase in siltation upstream, many rivers have experienced varying degrees of siltation. In severe cases, this can even lead to rising river levels, obstructed water flow, and reduced storage and discharge capacity, thus affecting regional flood control safety and ecological environment quality.

[0003] Currently, the main methods of river dredging include manual dredging, mechanical dredging, and hydraulic flushing. Among these, mechanical dredging is the most widely used and efficient method, typically accomplished using equipment such as suction pumps, excavators, and dredging vessels. The basic principle of mechanical dredging is to use suction pipes or buckets to disturb, suck up, or dredge the silt from the riverbed, and then transport it through pipelines to a designated area on the bank for sedimentation or treatment.

[0004] In practical engineering applications, the existing technologies have the following technical problems and shortcomings: First, the riverbed environment is complex, often containing hard or foreign impurities such as stones, branches, and garbage. These impurities can easily cause blockages in the suction port or sludge conveying pipeline during the suction process, and may even damage key components such as the impeller and shaft of the sludge pump, affecting the continuity and safety of dredging operations. Second, silt with a long deposition time or high organic content often has high cohesiveness and easily forms clumps. When suctioning silt containing many clumps, the suction force may decrease or the suction port may be completely blocked, thus significantly reducing dredging efficiency. Patent application number 202511265452.7 discloses a river dredging device and its dredging method. It filters the river water sucked in by the sludge suction machine through a filter box and uses the downward movement of the water tank to drive a sliding potentiometer to adjust the speed of the hull, thereby improving the safety of the device. Although this solution has made some improvements in safety control, the problem of silt clumps blocking the suction port has not been effectively solved. Summary of the Invention

[0005] The purpose of this invention is to provide a river dredging device and a river dredging method. The technical problem to be solved is that foreign matter, impurities, and silt clumps can easily cause blockage of the suction port or silt conveying pipeline during the suction process.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A river dredging device, comprising: a dredging hull, wherein a driving control cabin is provided at the front of the dredging hull; a suction frame is installed at the stern of the dredging hull, and a suction pipe is provided at the lower part of the suction frame; a crushing component is installed at the lower end of the suction pipe; the upper end of the suction pipe is connected to a dredging box provided on the dredging hull, and the dredging box is connected to a sludge treatment box; the crushing component includes a protective cover, the lower end of the suction pipe is inserted into the top of the protective cover, a fixed gear is provided inside the protective cover, and the fixed gear is fixed to the end of the suction pipe; the lower end of the suction pipe is provided with a gear mounting part and a baffle, and a rotating gear is fixedly connected to a rotating frame to form an assembly, the assembly being installed on the gear mounting part; at least two rotating shafts are installed on the rotating frame; a revolution gear is fixed at the upper end of the rotating shaft, and a crushing hinge is installed at the lower part of the rotating shaft; the revolution gear and the fixed gear are meshed; a rotation drive wheel is meshed with the rotation gear, and a crushing motor drives the rotation gear to rotate.

[0007] The river dredging device of the present invention as described above further includes a rotating frame comprising a central disc and three rotating shaft mounting bodies evenly distributed around the outer periphery of the central disc, each rotating shaft mounting body being equipped with a rotating shaft, a self-rotating gear, and a breaking hinge plate.

[0008] The river dredging device of the present invention, as described above, further includes a dredging tank that uses a suction pump to draw silt from the bottom of the river through a suction pipe, a silt treatment tank that separates the silt from water, and a silt treatment tank that dewaters the silt by discharging clean water through the clean water outlet of the silt treatment tank.

[0009] The river dredging device of the present invention, as described above, further includes a lifting and anchoring assembly, which is fixed around the hull of the dredging vessel. The lifting and anchoring assembly includes a hull positioning anchor rod that can move vertically to achieve hull stability.

[0010] The river dredging device of the present invention, as described above, further includes a lifting and anchoring assembly comprising a hull support frame disposed on the outer wall of the dredging vessel, a lifting and reinforcing seat disposed at one end of the hull support frame, a hull positioning anchor rod passing through the lifting and reinforcing seat, a support plate disposed at the bottom of the hull positioning anchor rod, a drive screw rotatably mounted on the hull support frame, a threaded sleeve disposed on the drive screw, a push connecting rod hinged to the bottom of the threaded sleeve, the other end of the push connecting rod hinged to the hull positioning anchor rod, and a drive box connected to the drive screw.

[0011] The river dredging device of the present invention, as described above, further includes a drive box installed at the other end of the hull support frame, a lifting motor fixedly installed on the drive box, the power output shaft of the lifting motor located inside the transmission box, a drive gear provided at the end of the power output shaft, one end of the drive screw extending into the transmission box, a driven gear installed at the end of the drive screw, and the drive gear meshing with the driven gear.

[0012] The river dredging device of the present invention, as described above, further includes a limiting groove on the outer wall of the threaded sleeve, and a limiting protrusion with a strip structure on the hull support frame, wherein the limiting protrusion is inserted into the limiting groove.

[0013] This invention also provides a river dredging method, wherein the river dredging method utilizes the river dredging device described in any of the preceding claims. Preferably, the river dredging device and method include the following steps: S1, the dredging vessel enters the river dredging area, and after determining the work location, the dredging vessel is positioned and adjusted, with the support plate at the bottom of the hull positioning anchor contacting the riverbed for support; S2, after the positioning adjustment is completed, the dredging tank begins operation, and the dredging pump inside the dredging tank sucks in the silt from the bottom of the river. While the silt is being sucked in, the crushing motor drives the crushing blades to rotate on their own axis while simultaneously revolving around a central axis, thereby crushing the sucked-in silt and its impurities; S3, the silt enters the silt treatment tank, where mud and water are separated, and the clean water is discharged through the clean water outlet of the silt treatment tank, thus dewatering the silt. More preferably, during positioning adjustment in S1: the lifting motor located on the outside of the dredging vessel operates. When the lifting motor operates, it adjusts the lifting of the hull positioning anchor rod through the threaded sleeve and the push linkage. When the hull positioning anchor rod is lowered to a certain depth, it is supported by the support plate at the bottom of the hull positioning anchor rod in contact with the riverbed.

[0014] The beneficial effects of this invention are: 1. Effectively prevents clogging of the suction pipe and ensures continuous dredging. This invention, by installing a crushing component at the lower end of the suction pipe, uses a crushing motor to drive the crushing hinge blades during the suction process, achieving a combined rotation and revolution motion. This crushes and cuts the sucked-in silt and impurities such as branches, stones, and plastic bags, effectively preventing clogging of the suction pipe or pump inlet due to large impurities or clumps of silt, thus improving the continuity and reliability of dredging operations. 2. Enhances the stability and safety of dredging operations. Equipped with a lifting and anchoring component, the dredging vessel is supported at multiple points via hull positioning anchors and support plates. This maintains the vessel's balance and stillness even in areas with high river flow velocity or uneven bottoms, preventing swaying or drifting during operation and improving operational safety and dredging accuracy. This invention solves the technical problem of foreign matter and clumps of silt easily causing clogging of the suction port or conveying pipeline during the suction process. Attached Figure Description

[0015] The advantages of the present invention, both above and / or other aspects, will become clearer and more readily understood through the following detailed description taken in conjunction with the accompanying drawings, which are merely illustrative and do not limit the invention, wherein: Figure 1 This is a schematic diagram of a river dredging device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the protective cover according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the overall structure of a rotating hanger according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the mounting structure of a fixed gear according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the internal structure of a hull support frame according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the limiting structure of a threaded sleeve according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the internal structure of the transmission box according to an embodiment of the present invention.

[0016] The attached diagram lists the components represented by each number as follows: 100. Dredging hull; 101. Control cabin; 102. Silt treatment box; 103. Dredging box; 104. Suction frame; 200. Protective cover; 201. Suction pipe; 2011. Gear mounting part; 2012. Baffle; 202. Crushing motor; 203. Rotating gantry; 204. Revolutionary gear; 205. Crushing hinge; 206. Rotating gear; 207. Shaft; 208. Fixed gear; 209. Rotation drive wheel; 300. Hull support frame; 301. Lifting reinforcement seat; 302. Drive screw; 303. Hull positioning anchor bolt; 304. Support plate; 305. Threaded sleeve; 306. Push connecting rod; 307. Transmission box; 371. Lifting motor; 372. Drive gear; 373. Driven gear; 308. Limiting protrusion; 309. Limiting groove. Detailed Implementation

[0017] In the following description, embodiments of the river dredging device and river dredging method of the present invention will be described with reference to the accompanying drawings.

[0018] The embodiments described herein are specific implementations of the present invention, used to illustrate the concept of the invention, and are illustrative and exemplary, and should not be construed as limiting the implementation or scope of the invention. In addition to the embodiments described herein, those skilled in the art can employ other obvious technical solutions based on the content disclosed in the claims and specification of this application. These technical solutions include those that make any obvious substitutions and modifications to the embodiments described herein.

[0019] The accompanying drawings in this specification are schematic diagrams to aid in illustrating the concept of the invention, and schematically show the shapes of the various parts and their interrelationships. Please note that, in order to clearly demonstrate the structure of the components in the embodiments of the invention, the drawings are not drawn to the same scale. The same reference numerals are used to indicate the same parts.

[0020] The following combination Figures 1 to 7 This invention describes a river dredging device and method according to an embodiment of the present invention, which includes: The dredging vessel 100 has a control cabin 101 at its forward end; a suction frame 104 is installed at the stern of the dredging vessel 100, and a suction pipe 201 is provided at the lower part of the suction frame 104; the suction pipe is preferably made of aluminum alloy or stainless steel, and the wall thickness of the suction pipe is not less than 5mm. In a preferred embodiment, the dredging frame has a hollow structure inside, and the suction pipe is partially installed inside the dredging frame.

[0021] A crushing component is installed at the lower end of the suction pipe 201; the upper end of the suction pipe 201 is connected to the dredging box 103 installed on the dredging vessel hull 100, and the dredging box 103 is connected to the sludge treatment box 102; the dredging box is equipped with a suction pump, which sucks the sludge from the bottom of the river through the suction pipe 201 by the suction action of the suction pump; the sludge treatment box 102 separates the sludge from the water, and the clean water is discharged through the clean water outlet of the sludge treatment box 102; the sludge treatment box is equipped with a dewatering device, and the sludge treatment box 102 dewaters the sludge through the dewatering device.

[0022] The crushing component includes a protective cover 200, combined with Figure 2As shown, the protective cover has a cylindrical structure with a top cover and an opening at the bottom. The lower end of the suction pipe 201 is inserted into the top of the protective cover 200, i.e., a circular hole is made at the top cover of the protective cover for the suction pipe to pass through. Preferably, the connection between the top cover and the suction pipe is sealed, such as by using adhesive, sealant, or by welding the top cover and the suction pipe together. A fixed gear 208 is installed inside the protective cover 200 and fixed to the end of the suction pipe. The lower end of the suction pipe 201 has a gear mounting part 2011 and a baffle 2012. A rotating gear 206 is fixedly connected to a rotating hanger 203 to form an assembly, which is installed on the gear mounting part 2011. At least two rotating shafts 207 are installed on the rotating hanger 203. A planetary gear 204 is fixed to the upper end of each rotating shaft 207, and a crushing hinge 205 is installed at the lower part of each shaft. The planetary gear 204 and the fixed gear 208 are meshed. A rotation drive wheel 209 is meshed with the rotating gear 206, and the crushing motor 202 drives the rotating gear 206 to rotate. Figure 4 As shown, the fixed gear has a hole on its gear disc for the output shaft of the crushing motor to pass through, and the self-rotating drive wheel 209 is fixed to the end of the output shaft of the crushing motor. In... Figure 3 In a preferred embodiment shown, the rotating hanger 203 includes a central disc and three rotating shaft 207 mounting bodies evenly distributed around the outer periphery of the central disc. Each rotating shaft 207 mounting body is equipped with a rotating shaft 207, a self-rotating gear 206, and a breaking hinge plate 205.

[0023] During operation, the protective cover 200 at the bottom of the suction frame 104 contacts the riverbed silt. At this time, the sludge removal box 103 sucks the silt into the silt treatment box 102 through its built-in suction pump. After treatment, the silt and filtered water are discharged. During silt suction, one end of the suction pipe 201 built into the suction frame 104 is equipped with a crushing component. When the protective cover 200 is at the silt, it is sucked in through the suction pipe 201. If the silt contains impurities such as branches and cloth bags, the crushing motor 202 runs during the suction process and drives the self-rotating drive wheel 209 to rotate. When the self-rotating drive wheel 209 rotates, it drives the rotating hanger 203 and the self-rotating gear. The bottom of 206 rotates synchronously, and when the rotating gantry 203 rotates, the orbital gear 204 also meshes with the fixed gear 208. While the rotating gantry 203 revolves, the meshing orbital gear 204 and fixed gear 208 can also drive the rotating shaft 207 and the crushing hinge 205 to rotate. Through the orbital and rotational rotation of the crushing hinge 205, the sucked silt and its impurities can be crushed and cut, which can prevent the lower end of the suction pipe from being blocked due to silt clumping, and can also prevent branches and other objects from entering the interior of the suction pipe 201 and causing blockage, thereby better ensuring the stability of the dredging work and avoiding the reduction of the working efficiency of the dredging vessel due to blockage caused by impurities.

[0024] During river dredging, the dredging vessel often struggles to maintain a relatively stationary and stable state within the flowing water, hindering continuous and stable dredging operations. A further improvement to the aforementioned river dredging device includes a lifting and anchoring assembly. This assembly is fixed around the dredging vessel 100 and includes a hull positioning anchor 303 that can move vertically to stabilize the vessel. The lifting and anchoring assembly includes a hull support frame 300 installed on the outer wall of the dredging vessel 100. A lifting and reinforcing seat 301 is provided at one end of the hull support frame 300. A hull positioning anchor rod 303 passes through the lifting and reinforcing seat 301. A support plate 304 is provided at the bottom of the hull positioning anchor rod 303. A drive screw 302 is rotatably mounted on the hull support frame 300. A threaded sleeve 305 is provided on the drive screw 302. The bottom of the threaded sleeve 305 is hinged to one end of a push rod 306. The other end of the push rod 306 is hinged to the hull positioning anchor rod 303. A drive box is connected to the drive screw 302. The drive box is installed at the other end of the hull support frame 300. A lifting motor 371 is fixedly installed on the drive box. The power output shaft of the lifting motor 371 is located inside the transmission box 307. A drive gear 372 is provided at the end of the power output shaft. One end of the drive screw 302 extends into the transmission box 307. A driven gear 373 is installed at the end of the drive screw 302. The drive gear 372 and the driven gear 373 are meshed and connected. Figure 7 Both the driving gear 372 and the driven gear 373 are bevel gears. In the above solution, the push rod 306 is used to prevent the threaded sleeve 305 from rotating during the drive process, but there is a problem of poor stability in movement. In a further improved embodiment, the outer wall of the threaded sleeve 305 is provided with a limiting groove 309, and a strip-shaped limiting protrusion 308 is provided on the hull support frame 300. The limiting protrusion 308 is inserted into the limiting groove 309.

[0025] A river dredging method utilizes a river dredging device equipped with a lifting and anchoring assembly. The method includes the following steps: S1, the dredging vessel enters the river dredging area, and after determining the work location, the dredging vessel hull 100 is positioned and adjusted. Support is provided by the support plate 304 at the bottom of the hull positioning anchor 303 contacting the riverbed. During positioning adjustment in S1: the lifting motor 371 located outside the dredging vessel hull 100 operates. When the lifting motor 371 operates, it adjusts the lifting of the hull positioning anchor 303 via a threaded sleeve 305 and a push rod 306. When the hull positioning anchor 303 is lowered to a certain depth, it is supported by the support plate 304 at the bottom of the hull positioning anchor 303 contacting the riverbed. S2. After the positioning and adjustment are completed, the sludge removal box 103 starts to operate. The sludge is sucked in from the bottom of the river by the sludge suction pump inside the sludge removal box 103. When the sludge is sucked in, the crushing motor 202 drives the crushing hinge 205 to rotate on its own axis and revolve around the center, thereby crushing the sucked sludge and its impurities. S3. The sludge enters the sludge treatment box 102, where mud and water are separated. The clean water is discharged through the clean water outlet of the sludge treatment box 102. The sludge treatment box 102 dewaters the sludge.

[0026] When using the dredging vessel described in this application for dredging operations, after the dredging vessel hull 100 enters the work area, if the area is a turbulent water zone, in order to ensure the stability of the equipment operation, the lifting motor 371 will operate. The operation of the lifting motor 371 drives the driven gear 373 to rotate through the driving gear 372. The rotating driven gear 373 drives the drive screw 302 to rotate synchronously. The rotating drive screw 302 drives the threaded sleeve 305 to move to one end through the thread, and when the threaded sleeve 305 moves, it also interacts with the limiting protrusion 308 and the limiting slide during the movement. The groove 309 is used for movement limitation to ensure the stable rotation of the threaded sleeve 305. When the threaded sleeve 305 moves, the push rod 306 at the bottom of the threaded sleeve 305 slowly changes from the inclined direction to the vertical direction. When the support angle of the push rod 306 changes, the push rod hull positioning anchor 303 moves downward within the lifting and reinforcing seat 301, thereby inserting the hull positioning anchor 303 into the riverbed and supporting it on the riverbed by the support plate 304 at the bottom of the hull positioning anchor 303. This allows for better positioning of the dredging vessel when the water flow is rapid. In addition, the four hull positioning anchors 303 are driven by four lifting motors 371 respectively, and their height can be adjusted individually during support, which can adapt to different riverbed heights and better ensure support stability.

[0027] The technical features disclosed above are not limited to the combinations of the disclosed features with other features. Those skilled in the art can also make other combinations of the technical features according to the purpose of the invention to achieve the purpose of the invention.

Claims

1. A river channel dredging apparatus, characterized by, The application relates to a dredging ship body (100) which comprises the following parts: a driving control cabin (101) arranged at the front of the dredging ship body (100); a suction dredging frame (104) arranged at the tail of the dredging ship body (100), wherein the lower part of the suction dredging frame (104) is provided with a suction dredging pipe (201); a crushing assembly arranged at the lower end of the suction dredging pipe (201); the upper end of the suction dredging pipe (201) is communicated with a dredging box (103) arranged on the dredging ship body (100), and the dredging box (103) is communicated with a sludge treatment box (102); the crushing assembly comprises a protective cover (200), the lower end of the suction dredging pipe (201) is inserted into the top of the protective cover (200), a fixed gear (208) is arranged in the protective cover (200), and the fixed gear (208) is fixed at the end of the suction dredging pipe (201); the lower end of the suction dredging pipe (201) is provided with a gear mounting part (2011) and a baffle (2012), a self-rotating gear (206) is fixedly connected with a rotating hanger (203) to form an assembly, and the assembly is arranged on the gear mounting part (2011); at least two rotating shafts (207) are arranged on the rotating hanger (203); the upper end of the rotating shaft (207) is fixed with a revolving gear (204), and the lower part of the rotating shaft (207) is provided with a crushing hinge piece (205); the revolving gear (204) and the fixed gear (208) are in meshing connection; a self-rotating driving wheel (209) is in meshing connection with the self-rotating gear (206), and a crushing motor (202) drives the self-rotating gear (206) to rotate. The rotating hanger (203) comprises a middle disc body and three rotating shaft (207) mounting bodies which are uniformly arranged on the periphery of the middle disc body, and each rotating shaft (207) mounting body is provided with a rotating shaft (207), a self-rotating gear (206) and a crushing hinge piece (205).

2. The riverway dredging apparatus according to claim 1, characterized by The dredging box (103) sucks the sludge at the bottom of a river channel into the sludge treatment box (102) through the suction dredging pipe (201) by the suction of a suction pump, the sludge treatment box (102) separates the sludge and water, the clean water is discharged through a clean water outlet of the sludge treatment box (102), and the sludge treatment box (102) performs dehydration treatment on the sludge.

3. The riverway dredging apparatus of claim 1, wherein The application further comprises a lifting anchoring assembly which is fixed around the dredging ship body (100) and comprises a ship body positioning anchor rod (303) which can be vertically moved to realize ship body stabilization.

4. A river channel dredging device according to any one of claims 1 to 3, characterized in that ​ 5. The riverway dredging apparatus of claim 4, wherein, The lifting anchor assembly comprises a hull support frame (300) arranged on the outer wall of the dredging hull (100), one end of the hull support frame (300) is provided with a lifting reinforcing seat (301), a hull positioning anchor rod (303) penetrates through the lifting reinforcing seat (301), the bottom of the hull positioning anchor rod (303) is provided with a supporting disc (304), a drive screw (302) is rotatably arranged on the hull support frame (300), a threaded sleeve (305) is arranged on the drive screw (302), one end of the threaded sleeve (305) is hingedly connected to a pushing connecting rod (306), the other end of the pushing connecting rod (306) is hingedly connected to the hull positioning anchor rod (303), and a drive box is connected with the drive screw (302).

6. The riverway dredging apparatus of claim 5, wherein, The drive box is arranged at the other end of the hull support frame (300), a lifting motor (371) is fixedly arranged on the drive box, the power output shaft of the lifting motor (371) is located on the inner side of a transmission box (307), the end of the power output shaft is provided with a driving gear (372), one end of the drive screw (302) extends into the transmission box (307), the end of the drive screw (302) is provided with a driven gear (373), and the driving gear (372) is in meshing connection with the driven gear (373).

7. The riverway dredging apparatus of claim 6, wherein, The outer wall of the threaded sleeve (305) is provided with a limiting sliding groove (309), and a strip-shaped limiting protrusion (308) is arranged on the hull support frame (300) and inserted into the limiting sliding groove (309).

8. A method of river channel dredging, characterized by, The river dredging method is performed by using the river dredging device according to any one of claims 4 to 7.

9. The river channel dredging method according to claim 8, characterized by, The method comprises the following steps: S1, the dredging ship enters the river dredging area, the working position is determined, the dredging hull (100) is positioned and adjusted, and the supporting disc (304) at the bottom of the hull positioning anchor rod (303) contacts the riverbed to support; S2, after the positioning and adjustment is completed, the dredging box (103) starts to operate, the silt at the bottom of the river is sucked into the dredging box (103) by the action of the silt suction pump, and the broken blades (205) are driven to revolve around the sun while revolving around the sun by the broken motor (202) when the silt is sucked, so that the silt and impurities sucked in are broken; S3, the silt enters the silt treatment box (102), the silt and water are separated in the silt treatment box (102), the clean water is discharged through the clean water outlet of the silt treatment box (102), and the silt treatment box (102) dehydrates the silt.

10. The river channel dredging method according to claim 9, characterized by, In the positioning and adjustment in S1, the lifting motor (371) located outside the dredging hull (100) works, the lifting motor (371) adjusts the lifting of the hull positioning anchor rod (303) through the threaded sleeve (305) and the pushing connecting rod (306) when working, and the supporting disc (304) at the bottom of the hull positioning anchor rod (303) contacts the riverbed to support when the hull positioning anchor rod (303) is lowered to a certain depth.

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