An assembled non-self-propelled cutter-suction dredger hull structure

Abstract

The present application relates to a kind of assembled non-self-propelled cutter suction dredger hull structures, including main float tank and side float tank, side float tank is sequentially connected by first section, intermediate, tail section side float tank unit;First section and intermediate side float tank unit splicing end are equipped with first, second sealed transition empty cabin, and are sealed by fastener connection;Intermediate side float tank unit is equipped with third sealed transition empty cabin close to main float tank side, and tail section side float tank unit is equipped with fourth sealed transition empty cabin adjacent to intermediate side float tank unit side, and tail section side float tank unit is also equipped with fifth sealed transition empty cabin, and all are sealed with main float tank;Main float tank inner wall is welded with the main float tank sealing chamber corresponding to the above-mentioned sealed transition empty cabin, and sealing assembly is arranged therebetween, and the sealing connection or disassembly of side float tank and main float tank is realized by operating sealed transition empty cabin.The structure cooperates with sealed transition empty cabin and sealing assembly, effectively solve the problems such as low construction efficiency, poor sealing, inconvenient maintenance etc. of traditional splicing mode, improve the hull splicing construction efficiency and reliability.

Description

Technical Field

[0001] This invention belongs to the field of shipbuilding technology, and in particular relates to a hull structure for a modular non-self-propelled cutter suction dredger. Background Technology

[0002] In the traditional hull structure design of non-self-propelled cutter suction dredgers, the splicing between the side buoys and the main buoys mainly relies on flange bolt connections. This connection method involves setting flanges on the splicing end faces of the side and main buoys and using bolts to fasten the two flanges together, thereby achieving the splicing of the hull structure. However, this traditional splicing method has revealed many problems in practical applications, making it difficult to meet the requirements of modern cutter suction dredgers for efficient construction, reliable sealing, and safe operation.

[0003] First, traditional flange bolt connections have significant drawbacks in terms of construction efficiency. Because flanges require precise alignment and the bolt tightening process is complex, especially in narrow or hard-to-reach hull spaces, construction difficulty increases significantly, leading to longer construction periods and higher labor costs. Furthermore, bolted connections are susceptible to loosening due to vibration and impact during long-term use, which in turn affects the overall stability and safety of the hull structure.

[0004] Secondly, traditional splicing methods have serious defects in sealing performance. Due to the lack of a dedicated design for sealing transition compartments, the joint between the side buoys and the main buoys often relies solely on gaskets between the flanges for sealing. This sealing method is prone to failure over long-term use due to gasket aging, deformation, or wear, leading to seawater leakage. Once seawater leaks, it will directly enter the ship's functional compartments, causing corrosion and damage to onboard equipment, severely impacting the ship's normal operation and service life.

[0005] Furthermore, traditional splicing methods also present numerous inconveniences in terms of maintenance and repair. Due to the complexity of bolted connections, disassembly and reinstallation are cumbersome, requiring significant time and manpower. Simultaneously, disassembly may damage the hull structure, further increasing maintenance difficulty and costs. Moreover, the lack of an effective sealed transition chamber design makes it difficult to quickly locate and repair leaks, resulting in low maintenance efficiency.

[0006] To address the aforementioned problems, this invention proposes a modular non-self-propelled cutter suction dredger hull structure. Summary of the Invention

[0007] To address the problems existing in the prior art, this invention provides a modular, non-self-propelled cutter suction dredger hull structure. By employing innovative technologies such as detachable side buoys, sealed transition chambers, and sealing components, it effectively solves the problems of low construction efficiency, poor sealing performance, and inconvenient maintenance associated with traditional splicing methods. This structure not only improves the construction efficiency and reliability of hull splicing but also significantly enhances the sealing performance of the hull structure, effectively preventing seawater leakage from damaging onboard equipment and providing strong support for the efficient and safe operation of the cutter suction dredger.

[0008] This invention is implemented as follows: a modular non-self-propelled cutter suction dredger hull structure, comprising a main buoy and side buoys detachably installed on both sides of the main buoy, characterized in that: the side buoys comprise sequentially connected first side buoy unit, middle side buoy unit, and stern side buoy unit; the splicing ends of the first side buoy unit and the middle side buoy unit are correspondingly designed with a first sealed transition chamber and a second sealed transition chamber sealed by fasteners; the middle side buoy unit has a third sealed transition chamber sealed to the main buoy unit near the side of the main buoy unit; the stern side buoy unit is located near the middle side buoy unit... One side of the side buoy unit is provided with a fourth sealed transition chamber that is sealed to the main buoy unit; the tail side buoy unit is also provided with a fifth sealed transition chamber that is sealed to the main buoy unit; the inner wall of the main buoy unit is welded with a main buoy sealing chamber corresponding to the third, fourth and fifth sealed transition chambers; a sealing assembly is provided between the main buoy sealing chamber and the third, fourth and fifth sealed transition chambers, and the operation of the third, fourth and fifth sealed transition chambers realizes the sealed connection or disassembly of the side buoy and the main buoy.

[0009] More preferably, the first side buoy unit includes: a first ballast water tank, two first main buoyancy chambers and a first side buoy deck located at its end; a first sealed transition chamber is provided at the end opposite to the first ballast water tank, and the first sealed transition chamber has the same width as the first main buoyancy chamber.

[0010] The intermediate side buoy unit includes: a second main buoyancy chamber, a storage chamber, and an intermediate side buoy deck; the end of the storage chamber is provided with a second sealed transition chamber of the same width as the first sealed transition chamber; the second sealed transition chamber and the first sealed transition chamber are sealed together by fasteners; on the side adjacent to the main buoy, two third sealed transition chambers are provided on the inner wall of the second main buoyancy chamber.

[0011] The stern side buoy unit includes: a generator compartment located in the middle, fuel tanks located on both sides of the generator compartment, a stern ballast water tank located at the stern, and a stern side buoy deck; a fourth sealed transition chamber is provided on one side adjacent to the middle side buoy unit, the fourth sealed transition chamber having the same width as the second main buoyancy chamber; a fifth sealed transition chamber is provided on the inner wall of the generator compartment on one side adjacent to the main buoy.

[0012] More preferably, the first sealing end plate of the first sealed transition chamber and the second sealed transition chamber includes a first sealing ring plate and a first main sealing core plate located inside it; the thickness of the first main sealing core plate is less than that of the first sealing ring plate; and the first sealing ring plate is provided with a first connecting hole.

[0013] More preferably, on the side adjacent to the main buoy, the second sealing end plate of the fourth sealed transition chamber and the fifth sealed transition chamber includes a second sealing ring plate and a second main sealing core plate located inside it; the thickness of the second main sealing core plate is less than that of the second sealing ring plate; the second sealing ring plate extends upward and is higher than the corresponding intermediate side buoy deck or stern side buoy deck, and its protruding portion is provided with a second connecting hole.

[0014] More preferably, the third sealed transition chamber is located at the corner of the inner wall of the second main buoyancy chamber; the fifth sealed transition chamber is located at the corner of the inner wall of the generator compartment adjacent to the tail ballast water tank.

[0015] More preferably, the main buoy box is equipped with at least a power distribution compartment and a pump compartment; the inner walls of the main buoy box power distribution compartment and pump compartment adjacent to the side buoy box are welded with corresponding third, fourth and fifth sealed transition compartments of the main buoy box sealing chamber.

[0016] More preferably, the sealing assembly includes a side float box sealing seat welded to the side float box; a main float box sealing seat welded to the main float box sealing chamber; and a bolt assembly connecting the side float box sealing seat and the main float box sealing seat; the main float box sealing seat has a cross-shaped through groove, which is composed of vertical through grooves and horizontal through grooves that are perpendicularly connected to each other; the vertical through grooves penetrate the top and bottom surfaces of the side float box sealing seat, and the horizontal through grooves are blind grooves; the side float box sealing seat has a through hole for the screw to pass through, and its end face facing the side float box sealing seat has a limiting end receiving groove;

[0017] The bolt assembly includes: a limiting end configured to pass through the vertical through slot and then rotate 90° to engage with the horizontal through slot; a screw rod, one end of which is fixedly connected to the limiting end, and the other end of which passes through the through hole; and a preload nut, which is threadedly engaged with the end of the screw rod; wherein the rotating limiting end is embedded in the limiting end receiving groove, and the depth of the limiting end receiving groove is greater than the thickness of the limiting end.

[0018] More preferably, the mating surfaces of the side buoy sealing seat and the main buoy sealing seat are provided with interlocking wedge-shaped mating parts, and the inclined surface of the wedge-shaped mating part extends perpendicularly to the hull splicing direction.

[0019] More preferably, a spacer is also fitted on the screw, which is located between the preload nut and the side float box sealing seat.

[0020] More preferably, a sealing ring is press-fitted between the spacer and the side float box sealing seat.

[0021] The advantages and technical effects of this invention are as follows: This invention adopts a design scheme in which segmented side floats and multi-stage sealed transition chambers work together, bringing significant improvements to the field of ship hull structure. Traditional flange bolt connections have poor sealing performance under complex sea conditions, posing significant safety hazards. This solution breaks with convention and demonstrates unique innovation.

[0022] In terms of structural design, double-sealed transition chambers are set between the main buoy, the middle buoy, and the stern side buoy units to create a double-sealed guarantee at the connection between the main buoy and the side buoys. At the same time, a three-level sealing protection system is constructed on the side of the main buoy, with the three layers of sealing protection working together to form a stepped sealing barrier.

[0023] This innovative design is remarkably effective in addressing seawater leakage. The leakage path becomes circuitous and tortuous due to the multiple sealing structures, increasing the difficulty of seawater leakage. Even if a partial seal fails, the leaked medium is effectively contained within an independent empty compartment, preventing it from infiltrating the ship's functional compartments and fundamentally eliminating the safety hazard of traditional designs where "a single leak can immediately enter a functional compartment."

[0024] This invention improves the safety and reliability of the hull structure under complex sea conditions, meets the usage requirements of cutter suction dredgers in harsh operating environments, provides new ideas for the technological development of the shipbuilding industry, and has broad application prospects and promotional value. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the first section of the side pontoon structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the single structure of the middle side floating box;

[0028] Figure 4 This is a schematic diagram of the tail-side floating box unit structure;

[0029] Figure 5 This is a schematic diagram of the first sealing ring plate structure;

[0030] Figure 6 This is a schematic diagram of the splicing structure of the first and second sealed transition chambers.

[0031] Figure 7 This is a schematic diagram of the upper structure connecting the side pontoons and the main pontoons;

[0032] Figure 8 This is a schematic diagram of the lower structure connecting the side pontoons and the main pontoons;

[0033] Figure 9 This is the main view of the present invention;

[0034] Figure 10 yes Figure 9 The right view;

[0035] Figure 11 yes Figure 9 Sectional view of AA;

[0036] Figure 12 yes Figure 10 BB section view;

[0037] Figure 13 and Figure 14 This is a three-dimensional structural schematic diagram of the present invention;

[0038] Figure 15 This is an exploded view of the invention;

[0039] Figure 16 This is a schematic diagram of the three-dimensional structure of the first sealing seat;

[0040] Figure 17 and Figure 18 This is a schematic diagram of the second sealing seat structure;

[0041] Figure 19 This is a schematic diagram of the integrated design structure of the limiting end and the screw;

[0042] In the diagram: 1. Main buoy; 2. Side buoy; 21. First side buoy unit; 211. First ballast water tank; 212. First main buoyancy empty tank; 213. First side buoy deck; 214. First sealed transition empty tank; 2141. First sealing ring plate; 2142. First main sealing core plate; 2143. First connecting hole; 22. Middle side buoy unit; 221. Second main buoyancy empty tank; 222. Storage tank; 223. Middle side buoy deck; 224. Second sealed transition empty tank; 225. Third sealed transition empty tank; 23. Aft side buoy unit; 231. Generator room; 232. Fuel tank; 233. Aft ballast water tank. ; 234. Aft side buoy deck; 235. Fourth sealed transition chamber; 2351. Second sealing ring plate; 2352. Second main sealing core plate; 2353. Second connecting hole; 236. Fifth sealed transition chamber; 24. Main buoy sealing seat; 241. Cross-shaped through slot; 241a. Vertical through slot; 241b. Horizontal through slot; 26. Side buoy sealing seat; 261. Through hole; 262. Limiting end receiving slot; 3. Bolt assembly; 31. Limiting end; 32. Screw; 33. Preload nut; 34. Spacer; 35. Sealing ring; 4. Wedge-shaped mating part; 11. Power distribution room; 12. Pump room; 13. Main buoy sealing chamber. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0044] Please see Figures 1 to 19A modular non-self-propelled cutter suction dredger hull structure includes a main buoy 1 and side buoys 2 detachably installed on both sides of the main buoy 1. Each side buoy 2 comprises a first side buoy unit 21, a middle side buoy unit 22, and a stern side buoy unit 23 connected sequentially. The first side buoy unit 21 and the middle side buoy unit 22 are respectively designed with a first sealed transition chamber 214 and a second sealed transition chamber 224, which are sealed together by fasteners, at their joint ends. The middle side buoy unit 22 has a third sealed transition chamber 225 sealed to the main buoy unit on the side near the main buoy unit. The stern side buoy unit 23 has a sealed transition chamber 225 on the side adjacent to the middle side buoy unit 22, which is sealed to the main buoy unit. The fourth sealed transition compartment 235 is connected to the main buoy box; the tail side buoy box 23 is also provided with a fifth sealed transition compartment 236 that is sealed to the main buoy box; the inner wall of the main buoy box 1 is welded with a main buoy box sealing chamber 13 corresponding to the third sealed transition compartment 225, the fourth sealed transition compartment 235 and the fifth sealed transition compartment 236; a sealing assembly is provided between the main buoy box sealing chamber 13 and the third sealed transition compartment 225, the fourth sealed transition compartment 235 and the fifth sealed transition compartment 236, and the operation of the third sealed transition compartment 225, the fourth sealed transition compartment 235 and the fifth sealed transition compartment 236 realizes the sealed connection or disassembly of the side buoy box 2 and the main buoy box 1.

[0045] This invention achieves a revolutionary improvement in hull structure through the coordinated design of segmented side buoys and multi-stage sealed transition chambers. Compared to traditional flange bolt connections, this solution incorporates double-sealed transition chambers between the bow, mid-section, and stern side buoy units, and constructs a three-stage sealing protection system on the main buoy side, forming a stepped sealing barrier. This design makes the seawater leakage path meander, ensuring that even if a partial seal fails, the leaked medium is effectively contained within an independent chamber, completely eliminating the significant safety hazard of "a single leak entering the functional compartment" inherent in traditional designs.

[0046] More preferably, the first side buoy unit 21 includes: a first ballast water tank 211 located at its end, two first main buoyancy chambers 212 and a first side buoy deck 213; a first sealed transition chamber 214 is provided at the end opposite to the first ballast water tank 211, and the first sealed transition chamber 214 has the same width as the first main buoyancy chamber 212.

[0047] The intermediate side buoy unit 22 includes: a second main buoyancy chamber 221, a storage chamber 222, and an intermediate side buoy deck 223; the end of the storage chamber 222 is provided with a second sealed transition chamber 224 of the same width as the first sealed transition chamber 214; the second sealed transition chamber 224 and the first sealed transition chamber 214 are sealed together by fasteners; on the side adjacent to the main buoy 1, two third sealed transition chambers 225 are provided on the inner wall of the second main buoyancy chamber 221; The stern side buoy unit 23 includes: a generator compartment 231 located in the middle, fuel tanks 232 located on both sides of the generator compartment 231, a stern ballast water tank 233 located at the stern, and a stern side buoy deck 234; a fourth sealed transition chamber 235 is provided on one side adjacent to the middle side buoy unit 22, the fourth sealed transition chamber 235 having the same width as the second main buoyancy chamber 221; a fifth sealed transition chamber 236 is provided on the inner wall of the generator compartment 231 on one side adjacent to the main buoy 1.

[0048] More preferably, the first sealing end plate of the first sealed transition chamber 214 and the second sealed transition chamber 224 includes a first sealing ring plate 2141 and a first main sealing core plate 2142 located inside it; the thickness of the first main sealing core plate 2142 is less than that of the first sealing ring plate 2141; the first sealing ring plate 2141 is provided with a first connecting hole 2143.

[0049] More preferably, on the side adjacent to the main buoy 1, the second sealing end plate of the fourth sealed transition chamber 235 and the fifth sealed transition chamber 236 includes a second sealing ring plate 2351 and a second main sealing core plate 2352 located inside it; the thickness of the second main sealing core plate 2352 is less than that of the second sealing ring plate 2351; the second sealing ring plate 2351 extends upward and is higher than the corresponding intermediate side buoy deck 223 or stern side buoy deck 234, and its protruding portion is provided with a second connecting hole 2353.

[0050] More preferably, the third sealed transition chamber 225 is located at the corner of the inner wall of the second main buoyancy chamber 221; the fifth sealed transition chamber 236 is located at the corner of the inner wall of the generator compartment 231 adjacent to the tail ballast water tank 233.

[0051] This modular cutter suction dredger side buoy with a sealed transition structure achieves efficient, stable, and safe operation through modular assembly, sealed transition structure design, sealed end plate design, and optimized placement of the sealed transition empty compartment. These technological advancements collectively enhance the overall performance and service life of the side buoy, meeting the operational needs of cutter suction dredgers in complex sea conditions.

[0052] More preferably, the main buoy box 1 is provided with at least a power distribution compartment 11 and a pump compartment 12; the inner walls of the power distribution compartment 11 and the pump compartment 12 of the main buoy box 1 adjacent to the side buoy box 2 are welded with corresponding third sealed transition compartment 225, fourth sealed transition compartment 235 and fifth sealed transition compartment 236 main buoy box sealing chambers 13.

[0053] More preferably, the sealing assembly includes a side float box sealing seat welded to the side float box; a main float box sealing seat welded to the main float box sealing chamber; and a bolt assembly 3 connecting the side float box sealing seat and the main float box sealing seat.

[0054] The main float box sealing seat 24 has a cross-shaped through groove 241, which is composed of a vertical through groove 241a and a horizontal through groove 241b that are perpendicularly connected to each other. The vertical through groove 241a penetrates the top and bottom surfaces of the side float box sealing seat 24, and the horizontal through groove 241b is a blind groove. The side float box sealing seat 26 has a through hole 261 for the screw to pass through, and its end face facing the main float box sealing seat 24 has a limiting end receiving groove 2. 62; The bolt assembly includes: a limiting end 31, configured to pass through the vertical through groove 241a and then rotate 90° to engage with the horizontal through groove 241b; a screw 32, one end of which is fixedly connected to the limiting end 31, and the other end of which passes through the through hole 261; and a preload nut 33, which is threadedly engaged with the end of the screw 32; wherein the rotated limiting end 31 is embedded in the limiting end receiving groove 262, and the depth of the limiting end receiving groove 262 is greater than the thickness of the limiting end 31. In the above technical solution, the limiting end engaging with the vertical through groove facilitates installation, and rotation prevents detachment, resulting in a simple and reliable structure. The preload nut operates within the transition sealing chamber, enabling unidirectional sealing preload and improving the sealing performance of the connection.

[0055] This sealing assembly enables unidirectional pre-tightening, eliminating the need for personnel on the main buoy side, thus reducing labor costs and improving installation efficiency. It also features an anti-loosening function, effectively preventing bolts from loosening and falling off during vessel operation due to vibration and other factors, enhancing the stability of the connection between the main buoy and the side buoys, and ensuring the overall structural safety of the cutter suction dredger.

[0056] Further preferably, the mating surfaces of the main buoy sealing seat 24 and the side buoy sealing seat 26 are provided with interlocking wedge-shaped mating parts 4, the inclined surface of which extends perpendicularly to the hull splicing direction. The wedge-shaped mating parts increase the contact area and engagement degree of the mating surfaces of the main buoy sealing seat and the side buoy sealing seat, further improving the sealing performance and stability of the connection. The inclined angle of the wedge-shaped mating parts is 5°-15°. Too small an angle (<5°) makes self-locking difficult and disassembly difficult, while too large an angle (>15°) weakens the radial sealing force; the preferred angle allows the nut preload to be efficiently converted into wedge-shaped surface clamping force, while ensuring that the inclined surface does not slip or fail under vibration conditions.

[0057] Preferably, a spacer 34 is also fitted onto the screw 32, and the spacer 34 is located between the preload nut 33 and the side float box sealing seat 24. The spacer disperses the pressure of the preload nut on the end face of the side float box sealing seat, avoiding local deformation and damage to the sealing surface; its rigid support function prevents the nut from loosening during vibration, improving the long-term connection stability.

[0058] In a further preferred embodiment, a sealing ring 35 is press-fitted between the spacer 34 and the side buoy sealing seat 24. The sealing ring, under pressure, fills the microscopic gap between the spacer and the second sealing seat, forming a secondary sealing barrier to block the seawater from seeping along the screw axis, especially to address micro-leakage at the interface caused by hull deformation.

[0059] Preferably, the limiting end 31 is a cuboid structure, the width of which is clearance-fitted with the width of the transverse through groove 241b, and its thickness is less than the width of the vertical through groove 241a. The cuboid structure of the limiting end and the transverse through groove have a clearance fit (0.1-0.3mm) to ensure no shaking or jamming after rotation; the design of thickness < width of the vertical through groove (difference ≥1mm) eliminates the need for precise alignment during insertion, improving the assembly error tolerance.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A modular non-self-propelled cutter suction dredger hull structure, comprising a main buoy (1) and side buoys (2) detachably installed on both sides of the main buoy (1), characterized in that: The side float (2) includes a first side float unit (21), a middle side float unit (22), and a tail side float unit (23) connected in sequence. The first side pontoon unit (21) and the middle side pontoon unit (22) are designed with a first sealed transition chamber (214) and a second sealed transition chamber (224) that are sealed by fasteners at the splicing ends. The first sealing end plate of the first sealed transition chamber (214) and the second sealed transition chamber (224) includes a first sealing ring plate (2141) and a first main sealing core plate (2142) located inside it; the thickness of the first main sealing core plate (2142) is less than that of the first sealing ring plate (2141); the first sealing ring plate (2141) is provided with a first connecting hole (2143); The middle side pontoon unit (22) is provided with a third sealed transition compartment (225) that is sealed to the main pontoon unit on the side close to the main pontoon unit; The tail side float unit (23) has a fourth sealed transition compartment (235) that is sealed to the main float unit on the side adjacent to the middle side float unit (22); The tail side buoy unit (23) is also equipped with a fifth sealed transition chamber (236) that is sealed to the main buoy; On the side adjacent to the main pontoon (1), the second sealing end plate of the fourth sealed transition compartment (235) and the fifth sealed transition compartment (236) includes a second sealing ring plate (2351) and a second main sealing core plate (2352) located inside it; the thickness of the second main sealing core plate (2352) is less than that of the second sealing ring plate (2351); the second sealing ring plate (2351) extends upward and is higher than the corresponding intermediate side pontoon deck (223) or stern side pontoon deck (234), and its protruding portion is provided with a second connecting hole (2353); The main float box (1) has a main float box sealing chamber (13) welded on the inner wall of the main float box (1) to the corresponding third sealed transition chamber (225), fourth sealed transition chamber (235) and fifth sealed transition chamber (236); A sealing assembly is provided between the main buoy box sealed chamber (13) and the third sealed transition chamber (225), the fourth sealed transition chamber (235) and the fifth sealed transition chamber (236). The operation of the third sealed transition chamber (225), the fourth sealed transition chamber (235) and the fifth sealed transition chamber (236) enables the side buoy box (2) and the main buoy box (1) to be sealed and connected or disassembled. Double-sealed transition chambers are set between the first, middle and stern side buoy units, and a three-level sealing protection system is constructed on the side of the main buoy to form a stepped sealing barrier.

2. The hull structure of the assembled non-self-propelled cutter suction dredger according to claim 1, characterized in that: The first side buoy unit (21) includes: a first ballast water tank (211) located at its end, two first main buoyancy chambers (212) and a first side buoy deck (213); a first sealed transition chamber (214) is provided at the end opposite to the first ballast water tank (211), and the first sealed transition chamber (214) has the same width as the first main buoyancy chamber (212); The intermediate side buoy unit (22) includes: a second main buoyancy chamber (221), a storage chamber (222), and an intermediate side buoy deck (223); the storage chamber (222) has a second sealed transition chamber (224) at its end, which is the same width as the first sealed transition chamber (214); the second sealed transition chamber (224) and the first sealed transition chamber (214) are sealed together by fasteners; on the side adjacent to the main buoy (1), two third sealed transition chambers (225) are provided on the inner wall of the second main buoyancy chamber (221); The stern side buoy unit (23) includes: a generator compartment (231) located in the middle, fuel tanks (232) located on both sides of the generator compartment (231), a stern ballast water tank (233) located at the stern, and a stern side buoy deck (234); a fourth sealed transition chamber (235) is provided on the side adjacent to the middle side buoy unit (22), the fourth sealed transition chamber (235) having the same width as the second main buoyancy chamber (221); a fifth sealed transition chamber (236) is provided on the inner wall of the generator compartment (231) on the side adjacent to the main buoy (1).

3. The hull structure of the assembled non-self-propelled cutter suction dredger according to claim 1, characterized in that: The third sealed transition chamber (225) is located at the corner of the inner wall of the second main buoyancy chamber (221); the fifth sealed transition chamber (236) is located at the corner of the inner wall of the generator room (231) adjacent to the tail ballast water tank (233).

4. According to claim 1, the hull structure of the assembled non-self-propelled cutter suction dredger is provided with at least a power distribution compartment (11) and a pump compartment (12) inside the main buoy box (1); the inner walls of the power distribution compartment (11) and the pump compartment (12) of the main buoy box (1) adjacent to the side buoy box (2) are welded with main buoy box sealing chambers (13) corresponding to the third sealed transition chamber (225), the fourth sealed transition chamber (235) and the fifth sealed transition chamber (236).

5. The hull structure of the assembled non-self-propelled cutter suction dredger according to claim 1, characterized in that: The sealing assembly includes a side float box sealing seat (26) sealed and welded to the side float box; a main float box sealing seat (24) sealed and welded inside the main float box sealing chamber (13); and a bolt assembly connecting the side float box sealing seat and the main float box sealing seat. The main float box sealing seat (24) is provided with a cross-shaped through groove (241), which is composed of a vertical through groove (241a) and a horizontal through groove (241b) that are perpendicularly connected to each other; the vertical through groove (241a) penetrates the top and bottom surfaces of the main float box sealing seat (24), and the horizontal through groove (241b) is a blind groove; The side float sealing seat (26) is provided with a through hole (261) for the screw to pass through, and its end face facing the main float sealing seat (24) is provided with a limiting end receiving groove (262); The bolt assembly includes: a limiting end (31) configured to pass through the vertical through groove (241a) and rotate 90° to engage with the horizontal through groove (241b); a screw (32) with one end fixedly connected to the limiting end (31) and the other end passing through the through hole (261); and a preload nut (33) threadedly engaged with the end of the screw (32); wherein the rotating limiting end (31) is embedded in the horizontal through groove (241b), and the depth of the limiting end receiving groove (262) is less than the thickness of the limiting end (31).

6. The hull structure of the assembled non-self-propelled cutter suction dredger according to claim 5, characterized in that: The mating surfaces of the side buoy sealing seat (26) and the main buoy sealing seat (24) are provided with wedge-shaped mating parts (4) that mesh with each other, and the inclined surface of the wedge-shaped mating part (4) extends perpendicularly to the hull splicing direction.

7. The hull structure of the assembled non-self-propelled cutter suction dredger according to claim 5, characterized in that: A spacer (34) is also fitted on the screw (32), which is located between the preload nut (33) and the main float box sealing seat (24).

8. The hull structure of the assembled non-self-propelled cutter suction dredger according to claim 7, characterized in that: A sealing ring (35) is press-fitted between the spacer (34) and the main float box sealing seat (24).

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