Split mounting type large backhoe dredger

Abstract

The invention belongs to the technical field of dredging engineering equipment, and discloses an assembly type large backhoe dredger which comprises a dredger body of a modular assembly structure. An excavator is arranged at the tail of the ship body, and a ship anchor structure is fixedly installed at the position, located on one side of the excavator, of the tail of the ship body; the ship body comprises a tail bin water carrying tank, a water ballast tank, an auxiliary engine room, a void tank, a fore peak tank, a domestic sewage tank, a dirty oil water tank, a fuel oil tank, a transverse connecting structure and a longitudinal connecting structure. The ship body is sequentially provided with a tail bin water carrying tank, a water ballast tank, an auxiliary cabin, a void tank and a fore peak tank in the direction away from the excavator. Through the innovation of modular assembly design, structural layout optimization, intelligent cleaning and the like, the major defects of a traditional dredger are successfully overcome; and remarkable progress is brought in the aspects of manufacturing cost, transportation efficiency, deployment speed, operation stability, maintenance convenience and environmental adaptability.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of dredging engineering equipment, and particularly relates to a large-scale assembled backhoe dredger. BACKGROUND

[0002] The dredger is one of important tools for dredging the seabed, and is widely used in the fields of port, channel maintenance and underwater engineering construction, etc. Through the driving of powerful power equipment, the dredger can dive into the seabed to extract silt or other sediments, so as to provide necessary space and environment for underwater structures. The traditional dredger technology has been quite mature, although, with the increasingly high requirements for water quality environment and the diversified development of marine engineering, new challenges and requirements are put forward for the dredger; The traditional backhoe dredger is mostly of a monolithic structure, which is difficult to transport and assemble, especially for large-scale dredgers, the manufacturing, transportation and on-site installation cost of which is high, and the cycle is long, in addition, the monolithic structure has poor adaptability in complex water environment, and it is difficult to flexibly adjust the operation configuration. SUMMARY

[0003] The application aims at the problems in the prior art that the backhoe dredger is mostly of a monolithic structure, which is difficult to transport and assemble, especially for large-scale dredgers, the manufacturing, transportation and on-site installation cost of which is high, and the cycle is long, in addition, the monolithic structure has poor adaptability in complex water environment, and it is difficult to flexibly adjust the operation configuration, and proposes the following technical scheme: The application aims at the problems in the prior art that the backhoe dredger is mostly of a monolithic structure, which is difficult to transport and assemble, especially for large-scale dredgers, the manufacturing, transportation and on-site installation cost of which is high, and the cycle is long, in addition, the monolithic structure has poor adaptability in complex water environment, and it is difficult to flexibly adjust the operation configuration, and proposes the following technical scheme: The application aims at the problems in the prior art that the backhoe dredger is mostly of a monolithic structure, which is difficult to transport and assemble, especially for large-scale dredgers, the manufacturing, transportation and on-site installation cost of which is high, and the cycle is long, in addition, the monolithic structure has poor adaptability in complex water environment, and it is difficult to flexibly adjust the operation configuration, and proposes the following technical scheme: The application aims at the problems in the prior art that the backhoe dredger is mostly of a monolithic structure, which is difficult to transport and assemble, especially for large-scale dredgers, the manufacturing, transportation and on-site installation cost of which is high, and the cycle is long, in addition, the monolithic structure has poor adaptability in complex water environment, and it is difficult to flexibly adjust the operation configuration, and proposes the following technical scheme: The application aims at the problems in the prior art that the backhoe dredger is mostly of a monolithic structure, which is difficult to transport and assemble, especially for large-scale dredgers, the manufacturing, transportation and on-site installation cost of which is high, and the cycle is long, in addition, the monolithic structure has poor adaptability in complex water environment, and it is difficult to flexibly adjust the operation configuration, and proposes the following technical scheme: The application aims at the problems in the prior art that the backhoe dredger is mostly of a monolithic structure, which is difficult to transport and assemble, especially for large-scale dredgers, the manufacturing, transportation and on-site installation cost of which is high, and the cycle is long, in addition, the monolithic structure has poor adaptability in complex water environment, and it is difficult to flexibly adjust the operation configuration, and proposes the following technical scheme:

[0004] As the preferred of the above technical scheme, the stern cargo water tank, ballast water tank, auxiliary machinery cabin, empty cabin and bow cabin are arranged in five rows, the ballast water tank, auxiliary machinery cabin, empty cabin and bow cabin in each row are connected by a transverse connecting structure, the number of the empty cabin is four groups, and the number of the stern cargo water tank, ballast water tank, auxiliary machinery cabin, four groups of empty cabin and bow cabin is five, five, five, twenty and five respectively.

[0005] As the preferred of the above technical scheme, the five auxiliary machinery cabins and five empty cabins are connected by a longitudinal connecting structure, and the middle ballast water tank and the middle auxiliary machinery cabin are connected by a longitudinal connecting structure.

[0006] As the preferred of the above technical scheme, a tool room is arranged on the upper side of the hull near the excavator end, a crew activity room is arranged on the upper side of the hull near the tool room, and a crew rest room is arranged on the upper side of the hull near the crew activity room.

[0007] As the preferred of the above technical scheme, three fuel tanks are arranged inside the empty cabin near the auxiliary machinery cabin, a sanitary sewage tank is arranged inside the auxiliary machinery cabin below the crew activity room, and a dirty oil tank is arranged inside the auxiliary machinery cabin below the crew rest room.

[0008] As the preferred of the above technical scheme, the cleaning assembly comprises a fixed column fixedly installed in the pile foundation, the number of the fixed column is multiple, two fixed columns form a group, a positioning block is embedded and installed on one end surface of the fixed column, a circular pipe is connected through the inside of the positioning block, adjacent two positioning blocks form a group, a rotating wheel is rotatably connected between the circular pipes outside the positioning blocks in a group, and a high-pressure spray head is embedded and installed on one end surface of the rotating wheel.

[0009] As the preferred of the above technical scheme, the rotating wheel is meshed and connected with a rack, the same circular ring is connected between the top ends of multiple racks, a spring telescopic rod is embedded and installed between the outer surface bottom end of the circular ring and the top end of the hull, a support strip is welded at the top end of the circular ring, a swing rod is movably connected at the top end of the support strip, a cylinder is welded between adjacent two swing rods, and the cylinder is rotatably connected in the pile foundation.

[0010] As the preferred of the above technical scheme, multiple connecting pipes are embedded and installed equidistantly outside the circular pipe, the same arc-shaped pipe is connected between one end of multiple connecting pipes, and a water pump is connected at one end of the arc-shaped pipe.

[0011] As the preferred of the above technical scheme, the water pump is fixedly installed on the hull by screws, the water outlet end of the water pump is connected with the arc-shaped pipe, and the water inlet end of the water pump is connected with a water inlet pipeline.

[0012] The beneficial effects of the present application are: (1) The present application successfully solves the major defects of traditional dredgers through modular assembly design, structure layout optimization, and intelligent cleaning innovation, and brings significant progress in manufacturing cost, transportation efficiency, deployment speed, operation stability, maintenance convenience, and environmental adaptability.

[0013] (2) The ship body adopts a modular assembly structure composed of transverse connection structures and longitudinal connection structures, and each functional cabin can be manufactured separately in the factory in advance. This method greatly reduces the difficulty and cost of overall manufacturing and transportation of large components, solves the core pain points of traditional whole dredgers such as difficult transportation and assembly, high cost, and long cycle, and enables rapid assembly after module transportation to the construction site, greatly shortening the project preparation period and improving the flexibility of equipment deployment. (3) It can conveniently clean the outside of the fixed pile and the inclined surface at the bottom end of the fixed pile, ensure the cleanliness of the surface of the fixed pile, and avoid the phenomenon of the pile foundation and the fixed pile being stuck due to mud on the surface of the fixed pile. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 A structural schematic diagram of a large-scale assembled backhoe dredger in Example 1 is shown. Figure 2 A bottom view of a large-scale assembled backhoe dredger in Example 1 is shown. Figure 3 A structural schematic diagram of a ship body in Example 1 is shown. Figure 4 A mounting structure schematic diagram of a circular ring in Example 1 is shown. Figure 5 A structural schematic diagram of Figure 4 Area A in Example 1 is shown.

[0015] In the figure: 1, ship body; 11, tail cabin water tank; 12, ballast water tank; 13, auxiliary machinery cabin; 14, empty cabin; 18, bow cabin; 19, sewage tank; 110, oil water tank; 111, fuel tank; 112, transverse connection structure; 113, longitudinal connection structure; 2, crew rest room; 3, tool room; 4, crew activity room; 5, pile foundation; 6, excavator; 7, ship anchor structure; 81, circular pipe; 82, positioning block; 83, rotating wheel; 84, high-pressure spray head; 85, rack; 86, circular ring; 87, support bar; 88, swing rod; 89, cylinder; 810, spring telescopic rod; 811, connecting pipe; 812, arc pipe; 813, water pump; 814, fixed column. DETAILED DESCRIPTION

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0017] Example 1 This invention provides a modular large backhoe dredger, such as Figures 1 to 5 As shown, the vessel includes: a hull 1, which adopts a modular assembly structure; an excavator 6 is installed at the stern of the hull 1, and an anchor structure 7 is fixedly installed at the stern of the hull 1 on one side of the excavator 6 (the anchor structure 7 includes a reel, guide seat, wire rope and anchor, which are existing technologies and will not be elaborated on here); the hull 1 includes: a stern water tank 11, a ballast water tank 12, an auxiliary engine room 13, an empty compartment 14, a bow tip compartment 18, a domestic sewage tank 19, an oily water tank 110 and a fuel tank 111, a transverse connecting structure 112 and a longitudinal connecting structure 113; the hull 1 is arranged sequentially along the direction away from the excavator 6, including the stern water tank 11, the ballast water tank 12, the auxiliary engine room 13, the ballast water tank 14, the bow tip compartment 18, a domestic sewage tank 19, an oily water tank 110 and a fuel tank 111, a transverse connecting structure 112 and a longitudinal connecting structure 113; the hull 1 is arranged sequentially along the direction away from the excavator 6, including the stern water tank 11, the ballast water tank 12, the auxiliary engine room 14, the ballast water tank 15, the auxiliary engine room 16, the ballast water tank 12, the auxiliary engine room 13, the ballast water tank 14, the ballast water tank 15, the auxiliary engine room 16, the ballast water tank 12, the auxiliary engine room 13, the ballast water tank 14, the auxiliary engine room 15, the ballast water tank 16, the auxiliary engine room 17, the auxiliary engine room 18, the ballast water tank 19, the auxiliary engine room 11 The hull 13, empty hull 14, and bow tip 18, as well as the stern water tank 11, ballast water tank 12, auxiliary engine room 13, empty hull 14, and bow tip 18, are all welded with transverse connecting structures 112. The auxiliary engine room 13 and empty hull 14 are fixedly installed with longitudinal connecting structures 113 inside the ballast water tank 12 and auxiliary engine room 13. The auxiliary engine room 13 is equipped with a domestic sewage tank 19 and an oily waste water tank 110. The empty hull 14 is equipped with a fuel tank 111. The hull 1 is equipped with pile foundations 5 by screws. The pile foundations 5 are equipped with cleaning components. The cleaning components clean the outside of the fixed pile. When the fixed pile is separated from the cleaning components, the cleaning components deflect to clean the inclined surface at the bottom of the fixed pile.

[0018] Traditional backhoe dredgers are mostly of integral structure, which is difficult to transport and assemble. Especially for large dredgers, the manufacturing, transportation and on-site installation costs are high and the cycle is long. In addition, the integral structure is not adaptable to complex water environment and it is difficult to flexibly adjust the operation configuration. The hull 1 adopts a modular assembly structure consisting of a transverse connecting structure 112 and a longitudinal connecting structure 113. Each functional compartment (such as the ballast water tank 11, the ballast water tank 12, the auxiliary machinery compartment 13, the empty compartment 14, and the bow tip compartment 18) can be prefabricated in the factory. This method greatly reduces the difficulty and cost of manufacturing and transporting large components as a whole, and solves the core pain points of traditional integral dredgers, such as difficult transportation and assembly, high cost, and long cycle. After the modules are transported to the construction site, they can be quickly assembled, which greatly shortens the project preparation cycle and improves the flexibility of equipment deployment. The functional cabins are arranged longitudinally along the ship body 1, and are firmly connected with each other through the welded transverse connecting structure 112 and the longitudinal connecting structure 113 installed inside the key cabin, so as to form a ship body 1 with high integrity and stable structure, which not only guarantees the structural strength of the ship body 1 under the complex water area operation and the wind and wave impact, but also effectively adjusts the floating state and gravity center of the ship body 1 through the cooperation of the ballast water tank 12 and the tail cargo water tank 11, so as to ensure the stability and safety in the operation process. The present application successfully solves the major defects of the traditional dredger through the modular assembly design, structure layout optimization and intelligent cleaning, and brings significant progress in manufacturing cost, transportation efficiency, deployment speed, operation stability, maintenance convenience and environmental adaptability.

[0019] In order to realize the assembly and fixation among the tail cargo water tank 11, the ballast water tank 12, the auxiliary engine cabin 13, the empty cabin 14 and the bow tip cabin 18 in the above examples, the following solutions are proposed, for example, Figures 1 to 3 As shown in the figure, the tail cargo water tank 11, the ballast water tank 12, the auxiliary engine cabin 13, the empty cabin 14 and the bow tip cabin 18 are arranged in five rows, and each of the ballast water tank 12, the auxiliary engine cabin 13, the empty cabin 14 and the bow tip cabin 18 is connected through the transverse connecting structure 112. The number of the empty cabin 14 is set to four groups, and the number of the tail cargo water tank 11, the ballast water tank 12, the auxiliary engine cabin 13, the four groups of empty cabin 14 and the bow tip cabin 18 is set to five, five, five, twenty and five respectively. The five auxiliary engine cabins 13 and the five empty cabins 14 are connected through the longitudinal connecting structure 113. The most middle ballast water tank 12 and the most middle auxiliary engine cabin 13 are connected through the longitudinal connecting structure 113. The tool room 3 is arranged on the upper side of the ship body 1 close to one end of the excavator 6. The crew activity room 4 is arranged on the upper side of the ship body 1 close to one side of the tool room 3. The crew rest room 2 is arranged on the upper side of the ship body 1 close to one side of the crew activity room 4. Three fuel tanks 111 are arranged in the empty cabin 14 close to the auxiliary engine cabin 13. The sewage tank 19 is arranged in the auxiliary engine cabin 13 below the crew activity room 4. The oil water tank 110 is arranged in the auxiliary engine cabin 13 below the crew rest room 2.

[0020] In use, the tail warehouse water tank 11, ballast water tank 12, auxiliary machinery cabin 13, four empty cabin 14 and the first sharp cabin 18 are sequentially welded, so that the ship body 1 is formed, and then the second group of tail warehouse water tank 11, ballast water tank 12, auxiliary machinery cabin 13, four empty cabin 14 and the first sharp cabin 18 are sequentially welded, and the above is sequentially welded, and five ship bodies 1 are welded, and then the two ballast water tanks 12, auxiliary machinery cabins 13, empty cabins 14 and first sharp cabins 18 of the five ship bodies 1 are connected by the transverse connecting structure 112 (the transverse connecting structure 112 belongs to the cross plate), and then the auxiliary machinery cabin 13 and the adjacent empty cabin 14 are connected by the longitudinal connecting structure 113 (the longitudinal connecting structure 113 is composed of two iron plates, a plurality of screw rods and nuts, and the two iron plates are located on the inner walls of the auxiliary machinery cabin 13 and the adjacent empty cabin 14, then the screw rods are penetrated and screwed to fix the nuts), then the tool room 3 is welded on the ship body 1 above the end close to the excavator 6, then the crew activity room 4 is welded on the side of the ship body 1 above the tool room 3, and the crew rest room 2 is welded on the side of the ship body 1 above the crew activity room 4, three fuel tanks 111 are installed in the adjacent empty cabin 14 inside the auxiliary machinery cabin 13 through screws, a sewage tank 19 is installed in the auxiliary machinery cabin 13 below the crew activity room 4 through screws, and a waste oil tank 110 is installed in the auxiliary machinery cabin 13 below the crew rest room 2 through screws.

[0021] In order to solve the problem of how to prevent the fixed pile from being stuck between the fixed pile and the pile foundation 5 due to silt in the above example, and prevent silt from remaining outside the fixed pile, the following solutions are proposed, as shown in Figure 2 、 Figure 4 and Figure 5 , the cleaning assembly comprises: a fixed column 814 welded and installed in the pile foundation 5, the number of fixed columns 814 is set to be multiple, two fixed columns 814 form a group, one end surface of the fixed column 814 is embeddedly installed with a positioning block 82, the positioning block 82 is connected with a circular pipe 81 penetratingly, adjacent two positioning blocks 82 form a group, a group of positioning blocks 82 are rotatably connected with a rotating wheel 83 at the position outside the circular pipe 81, one end surface of the rotating wheel 83 is embeddedly installed with a high-pressure spray head 84 (the outer surface of the high-pressure spray head 84 is provided with a sawtooth on one side, as shown in Figure 4The sawtooth part outside the rotating wheel 83 is engaged with a rack 85, a same annular ring 86 is welded between the top ends of the plurality of racks 85, a spring telescopic rod 810 is embedded and installed between the bottom end of the outer surface of the annular ring 86 and the top end of the ship body 1, a support bar 87 (the support bar 87 is composed of a vertical bar and a circular rod) is welded at the top end of the annular ring 86, a swing rod 88 (a guide groove is formed in the inside of the swing rod 88, and the circular rod is located in the guide groove) is movably connected at the top end of the support bar 87, a cylinder 89 is welded between two adjacent swing rods 88, the cylinder 89 is rotatably connected in the pile foundation 5, a plurality of connecting pipes 811 are embedded and installed at equal intervals outside the circular pipe 81, a same arc-shaped pipe 812 is sleeved and connected at one end of the plurality of connecting pipes 811, a water pump 813 is connected at one end of the arc-shaped pipe 812, the water pump 813 is fixedly installed on the ship body 1 through screws, and the water outlet end of the water pump 813 is threadedly connected with the arc-shaped pipe 812.

[0022] In use, the fixed pile (the bottom end of the fixed pile is conical, facilitating insertion into the soil) moves along the inside of the pile foundation 5, at this time, the bottom end of the fixed pile is close to the swing rod 88, and the diameter of the fixed pile changes from small to large, at this time, the swing rod 88 is pushed to displace, causing the swing rod 88 to swing along the outside of the cylinder 89, since the swing rod 88 swings to drive the annular ring 86 to rise through the support bar 87, the annular ring 86 drives the spring telescopic rod 810 to stretch while rising, and the annular ring 86 drives the rotating wheel 83 to rotate through the rack 85, the rotating wheel 83 drives the angle of the high-pressure nozzle 84 to change (deflect downward) when rotating. When the fixed pile is removed, at this time, the water pump 813 is started, the water pump 813 sucks water from the outside to enter into the inside of the circular pipe 81 along the arc-shaped pipe 812 and the connecting pipe 811, at this time, the water blows on the outside of the fixed pile along the high-pressure nozzle 84 obliquely downward, when the fixed pile continues to rise to cause the diameter to change from large to small, at this time, the swing rod 88 cannot be pushed, at this time, the spring telescopic rod 810 drives the annular ring 86 to reset, the annular ring 86 drives the rotating wheel 83 to rotate through the rack 85 when resetting, so that the angle of the high-pressure nozzle 84 changes (deflects upward), and the bottom end of the fixed pile is driven to be washed.

[0023] Working principle: First, the functional cabin modules used to constitute the single-column hull 1, i.e. the tail cabin water tank 11, the ballast water tank 12, the auxiliary machinery cabin 13, the four empty cabins 14 and the bow cabin 18, are arranged in order, and the adjacent interfaces of these cabin modules are firmly connected by welding to form a complete and longitudinal hull column unit. Repeat the process to complete the assembly of five columns of the same hull 1 column unit. Arrange the five columns of the assembled hull 1 column unit in parallel, and use the transverse connection structure 112 (specifically a cross-shaped connecting plate) to weld the corresponding ballast water tank 12, auxiliary machinery cabin 13, empty cabin 14 and bow cabin 18 in the adjacent two columns of hull 1 unit. This step integrates the five columns into a large hull 1 platform with a whole width, ensuring the transverse strength and stability of the hull 1. Inside the hull 1, the key parts are reinforced using the longitudinal connection structure 113 (specifically: the inner walls of the auxiliary machinery cabin 13 and the adjacent empty cabin 14 are tightly connected by screw rod, nut and pressing plate structure), and the ballast water tank 12 in the middle column and the auxiliary machinery cabin 13 in the middle are connected in the same way. This step significantly enhances the longitudinal structural rigidity of the hull 1. Above the completed hull 1 platform deck, the tool room 3, the crew activity room 4 and the crew rest room 2 are welded and installed at designated positions. Three fuel tanks 111 are installed in the empty cabin 14 adjacent to the auxiliary machinery cabin 13. The sanitary sewage tank 19 is installed in the auxiliary machinery cabin 13 directly below the crew activity room 4. The oil sewage tank 110 is installed in the auxiliary machinery cabin 13 directly below the crew rest room 2. The excavator 6 and the ship anchor structure 7 are installed at the tail of the hull 1. The pile foundation 5 and its internal cleaning assembly are installed, and the water inlet pipeline of the water pump 813 is connected. The cleaning assembly is in standby state. Under the contraction force of the spring telescopic rod 810, the swing rod 88 is retracted inward, and the spray angle of the high-pressure nozzle 84 is inclined upward to clean the fixed pile during the lowering process (cleaning the pile body). When the fixed pile starts to lower and passes through the pile foundation 5, the part of the pile body with gradually increasing diameter will extrude the swing rod 88 outward. The swing rod 88 overcomes the tension of the spring telescopic rod 810 and swings outward around the cylinder 89. The swing rod 88 pushes the circular ring 86 upward through the support strip 87 (the deflection force of the swing rod 88 is converted into the linear up-and-down pushing force of the support strip 87 through the action of the guide groove and the circular rod), the circular ring 86 moves upward synchronously with the fixed rack 85, the rack 85 drives the rotating wheel 83 to rotate, and the rotating wheel 83 drives the high-pressure nozzle 84 on it to deflect downward by a certain angle. When the fixed pile is disassembled after use, the water pump 813 is started, the pumped water flows through the arc-shaped pipe 812 and the connecting pipe 811 into the circular pipe 81, and finally is sprayed out at high speed from the downward deflected high-pressure nozzle 84, directly flushing the outside surface of the fixed pile being lowered, removing the attached silt and preventing jamming; When the fixed pile is lifted, the largest diameter part of the fixed pile gradually goes up, the pressure on the swing rod 88 disappears, at this time the spring telescopic rod 810 is retracted, pulling the annular ring 86 and the lower end of the rack 85 to reset downward, the rack 85 drives the rotating wheel 83 to rotate in the reverse direction, driving the high-pressure nozzle 84 to deflect upward and reset, at this time, the jet angle of the high-pressure nozzle 84 is aligned with the bottom conical slope of the fixed pile that is rising, the water pump 813 continues to work, and the high-pressure water flow effectively washes away the silt attached to the bottom slope of the fixed pile, ensuring that the fixed pile can be completely and cleanly recycled, laying the foundation for the next accurate positioning.

[0024] The above examples are only used to illustrate the technical solutions of the present application, and not to limit them.

Claims

1. A modular large backhoe dredger, characterized in that, include: The hull (1) adopts a modular assembly structure; an excavator (6) is provided at the stern of the hull (1), and an anchor structure (7) is fixedly installed at the stern of the hull (1) on one side of the excavator (6); the hull (1) includes: a stern water tank (11), a ballast water tank (12), an auxiliary engine room (13), an empty compartment (14), a bow tip compartment (18), a domestic sewage tank (19), an oily water tank (110), and a fuel tank (111), a transverse connection structure (112), and a longitudinal connection structure (113); the hull (1) is provided with a stern water tank (11), a ballast water tank (12), an auxiliary engine room (13), an empty compartment (14), and a bow tip compartment (18) in sequence along the direction away from the excavator (6), the stern water tank (11), a ballast water tank (12), an auxiliary engine room (13), an empty compartment (14), and a bow tip compartment (18) in the stern water tank (19), an oily water tank (110), and a fuel tank (111), a transverse connection structure (112), and a longitudinal connection structure (113); the hull (1) is provided with a stern water tank (11), a ballast water tank (12), an auxiliary engine room (13), an empty compartment (14), and a bow tip compartment (18) in sequence along the direction away from the excavator (6), the stern water tank (11), a ballast water tank (12), an auxiliary engine room (13), an empty compartment (14), and a bow tip compartment (18) in the direction away from the excavator (6), the stern water tank (11), an oily water tank (12), an auxiliary engine room (13), an empty compartment (14), and a bow tip compartment (18) in the direction away from the excavator (6), The water tank (11), ballast water tank (12), auxiliary engine room (13), empty tank (14) and bow tip tank (18) are all welded with transverse connecting structures (112). The auxiliary engine room (13) and empty tank (14) are fixedly installed with the ballast water tank (12) and auxiliary engine room (13) with longitudinal connecting structures (113). The auxiliary engine room (13) is equipped with a domestic sewage tank (19) and an oily water tank (110). The empty tank (14) is equipped with a fuel tank (111). The hull (1) is symmetrically fixedly installed with pile foundations (5) on top. The pile foundations (5) are equipped with cleaning components. The cleaning components clean the outside of the fixed piles. When the fixed piles are separated from the cleaning components, the cleaning components deflect to clean the inclined surface at the bottom of the fixed piles.

2. The modular large backhoe dredger according to claim 1, characterized in that, The tail section water tank (11), ballast water tank (12), auxiliary engine room (13), empty tank (14), and bow tip tank (18) are arranged in five rows. Each row of the ballast water tank (12), auxiliary engine room (13), empty tank (14), and bow tip tank (18) is connected by a transverse connecting structure (112). The number of empty tanks (14) is set to four groups. The number of the tail section water tank (11), ballast water tank (12), auxiliary engine room (13), four groups of empty tanks (14), and bow tip tank (18) are respectively set to a ratio of five to five to five to twenty to five.

3. The modular large backhoe dredger according to claim 1, characterized in that, The five auxiliary engine rooms (13) and the five empty rooms (14) are connected by a longitudinal connection structure (113), and the middle ballast water tank (12) and the middle auxiliary engine room (13) are connected by a longitudinal connection structure (113).

4. The modular large backhoe dredger according to claim 1, characterized in that, A tool room (3) is provided on the upper part of the hull (1) near the end of the excavator (6). A crew activity room (4) is provided on the upper part of the hull (1) near the tool room (3). A crew rest room (2) is provided on the upper part of the hull (1) near the crew activity room (4).

5. A modular large backhoe dredger according to claim 4, characterized in that, Three fuel tanks (111) are spaced apart inside a row of empty cabins (14) near the auxiliary engine room (13). A sewage tank (19) is installed inside the auxiliary engine room (13) below the crew activity room (4). A sludge tank (110) is installed inside the auxiliary engine room (13) below the crew rest room (2).

6. A modular large backhoe dredger according to claim 1, characterized in that, The cleaning assembly includes: a fixed column (814) fixedly installed inside the pile foundation (5), the number of fixed columns (814) is set to multiple, two fixed columns (814) are a group, a positioning block (82) is embedded in one end face of the fixed column (814), a circular tube (81) is connected through the inside of the positioning block (82), two adjacent positioning blocks (82) are a group, a rotating wheel (83) is rotatably connected between the positioning blocks (82) at the position outside the circular tube (81), and a high-pressure nozzle (84) is embedded in one end face of the rotating wheel (83).

7. A modular large backhoe dredger according to claim 6, characterized in that, A rack (85) is meshed with the outer side of the rotating wheel (83). A ring (86) is connected between the top ends of multiple racks (85). A spring telescopic rod (810) is embedded between the bottom end of the outer surface of the ring (86) and the top end of the hull (1). A support bar (87) is welded to the top end of the ring (86). A swing rod (88) is movably connected to the top end of the support bar (87). A cylinder (89) is welded between two adjacent swing rods (88). The cylinder (89) is rotatably connected to the inside of the pile foundation (5).

8. A modular large backhoe dredger according to claim 7, characterized in that, Multiple connecting pipes (811) are equidistantly embedded on the outer side of the circular pipe (81), and one end of the multiple connecting pipes (811) is connected to the same arc-shaped pipe (812), and one end of the arc-shaped pipe (812) is connected to a water pump (813).

9. A modular large backhoe dredger according to claim 8, characterized in that, The water pump (813) is fixedly installed on the hull (1) by screws. The water outlet of the water pump (813) is connected to the arc-shaped pipe (812), and the water inlet of the water pump (813) is connected to the water inlet pipe.

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