A V-type mud tank suction channel structure for a trailing suction hopper dredger

Abstract

The present invention discloses a V-shaped mud tank suction channel structure for a trailing suction dredger, comprising a connecting pipe, a mud tank suction channel, and a bow square turn. One end of the mud tank suction channel is connected to one end of the connecting pipe, and the other end of the mud tank suction channel is connected to the mud pipe of the bow through the bow square turn. The top surface of the mud tank suction channel is a double-top structure, and the inner wall of the double-top structure, the inner side surface of the mud tank suction channel, and the inner bottom surface of the mud tank suction channel are all smooth surfaces. The bottom structure of the mud tank suction channel is a longitudinally continuous structure. The bottom structure of the mud tank suction channel separates the mud door hinge and the rubber and provides support above the rubber. The double-top structure includes a double-top structure lower top plate and a double-top structure upper top plate located above the double-top structure lower top plate. The upper portion of the double-top structure lower top plate is fixedly connected to the double-top structure upper top plate via ribs or reinforcements. The present invention has few hard points, a uniform channel shape, low resistance, a simple construction process, high suction efficiency, and is safe and reliable. There are no protruding structures in the mud tank, and mud unloading is smooth.

Description

Technical Field

[0001] The invention relates to a V-type mud tank suction channel structure of a trailing suction dredger, belonging to the technical field of ship engineering design and manufacturing. Background Art

[0002] Trailing suction hopper dredgers (TSDs) are essential vessels for dredging operations. They possess the capabilities of autonomous navigation, mud loading and unloading, and possess high maneuverability and robustness. These significant advantages have led to their widespread use in numerous applications, including channel dredging and port excavation. TSDs utilize suction pipes or channels to transport mud and sand for the pumping and shore blowing process. The design of these channels requires consideration of numerous design requirements, including fluid dynamics, ease of construction, ease of maintenance, structural strength, serviceability, cleanliness of the pumping, and corrosion and wear resistance. The quality of the channel design is crucial to the efficiency of the pumping and shore blowing process.

[0003] Concepts regarding pumping channel design vary widely, but the primary focus is to minimize resistance and maximize channel flow. Dredgers have numerous hardpoints, yet the channel must be as smooth as possible, free of protruding objects that could disrupt sloping mud. To address these hardpoints, some trailing suction hopper dredgers equipped with pumping channels have incorporated triangular brackets, which further compromise channel flow.

[0004] The published patent "A method for manufacturing a mud tank pumping device" (CN117360721A) mainly involves a method for manufacturing a pumping device. The pumping channel mentioned therein has no top double shell, no side double shell, the flow channel is uneven, and the flow channel interface fluctuates, which affects the pumping efficiency. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: how to reduce the resistance of the cabin pumping channel, increase the fluidity of the cabin pumping channel, and improve the cabin pumping efficiency.

[0006] In order to solve the above technical problems, the technical solution of the present invention is to provide a V-type mud tank suction channel structure of a dredger, which is characterized in that it includes a connecting pipe, a mud tank suction channel, and a bow square turn circle, one end of the mud tank suction channel is connected to one end of the connecting pipe, and the other end of the mud tank suction channel is connected to the mud pipe of the bow through the bow square turn circle; the top surface of the mud tank suction channel is a double-top structure, the inner wall of the double-top structure, the inner side surface of the mud tank suction channel, and the inner bottom surface of the mud tank suction channel are all smooth surfaces, the bottom structure of the mud tank suction channel is a longitudinal continuous structure, the bottom structure of the mud tank suction channel separates the mud door hinge and the rubber, and provides support above the rubber; the double-top structure includes a lower top plate of the double-top structure and an upper top plate of the double-top structure located above the lower top plate of the double-top structure; the upper part of the lower top plate of the double-top structure is fixedly connected to the upper top plate of the double-top structure through ribs or reinforcement ribs.

[0007] Preferably, the side of the mud tank pumping channel is a double-shell structure, and the double-shell structure includes a double-shell outer shell and a double-shell inner shell. The outer side of the double-shell inner shell is fixedly connected to the double-shell outer shell through ribs or reinforcements. The double-shell inner shell is respectively fixedly connected to the upper top plate of the double-top structure, the lower top plate of the double-top structure, and the bottom structure of the mud tank pumping channel. The double-shell outer shell is respectively fixedly connected to the upper top plate of the double-top structure and the bottom structure of the mud tank pumping channel.

[0008] Preferably, the height of the double-top structure is between 0.13 and 0.4 m, the double-top structure is disconnected at the position of the mud tank door, and the outer side of the double-top structure adopts an arc transition; the width of the double shell structure is between 0.13 and 0.4 m; the thickness of the double-top structure and the double shell structure are both between 12 and 40 mm; the net width of the mud tank pumping channel is between 0.8 m and 1.5 m; the net height of the mud tank pumping channel is between 0.8 and 2 m; the thickness of the bottom structure of the mud tank pumping channel is between 12 and 45 mm.

[0009] Preferably, the side of the mud tank extraction channel is a single-shell structure, and the single-shell structure includes a double-shell inner shell and ribs or reinforcing ribs located on the outside of the double-shell inner shell and arranged vertically.

[0010] Preferably, the bottom structure of the mud tank pumping channel includes a bottom reinforcing structure guide arc plate, a tank pumping bottom plate, and a side sealing plate. The tank pumping bottom plate is covered on the rubber, and the bottom reinforcing structure guide arc plate is arranged above the mud door hinge point. The bottom reinforcing structure guide arc plate and the tank pumping bottom plate are transitionally connected through the side sealing plate.

[0011] Preferably, the mud tank pumping channel is located directly above the mud door; in the mud door area, a boss is provided locally on the mud door to ensure that the bottom of the mud tank pumping channel is a plane.

[0012] Preferably, a gate valve is provided on the connecting pipe; the stern seawater tank is a water diversion valve box; and the bow square-to-round end is square, trapezoidal, or polygonal.

[0013] Preferably, the bow square turning circle is made of a separate steel casting or a plurality of wear-resistant plates spliced ​​together; a wear-resistant plate is attached to the inner side of the mud tank extraction channel; the mud tank extraction channel is a broken line structure at the position where the mud extraction door is located.

[0014] Preferably, the other end of the connecting pipe is directly connected to the outer plate.

[0015] Preferably, a stern seawater tank is provided at the tail of the mud tank pumping channel, and the stern seawater tank is connected to the mud tank pumping channel through a connecting pipe.

[0016] The mud tank drain channel of this invention features a double-shell or single-shell structure on the sides, a double-roof structure on the top, and a continuous longitudinal box-shaped structure on the bottom. This ensures a uniform longitudinal flow path and prevents fluctuations. The mud tank drain channel is located directly above the mud door, ensuring efficient draining of the mud tank. Hinge reinforcements and mud door support are provided at the corners of the drain channel.

[0017] This invention reduces flow resistance through a double hull and double roof design. The bow's square-to-rounded bow structure further reduces flow resistance, lowering construction costs for shipowners. It also effectively increases strength reserves, reduces deformation, improves fatigue resistance, and reduces construction difficulty. Furthermore, it ensures that even if cracks develop in the inner hull of the double protective hull, the vessel's functionality will not be affected.

[0018] This invention offers low cost, simple maintenance, and easy construction. Even if problems arise, losses are minimal, making it maintainable at sea and highly reliable. The structure of this invention features few hard points, uniform channel shapes, low resistance, a simple construction process, high chamber extraction efficiency, and safety and reliability. The absence of protruding structures within the mud chamber ensures smooth mud unloading. Construction defects are minimized, strength and fatigue properties are improved, and construction difficulty is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a cross-sectional diagram of the draw-out passage without the draw-out door at position A;

[0020] Figure 2 It is a cross-sectional diagram of the draw-out passage with the draw-out door at position B;

[0021] Figure 3 This is a cross-sectional diagram of the middle position of the draw-out channel;

[0022] Figure 4 This is a schematic diagram of the square-to-circle structure of the tank extraction channel pipe position;

[0023] Figure 5 This is a schematic diagram of the connection structure between the tank pumping channel and the tank pumping water gate valve;

[0024] Figure 6 A schematic diagram of another alternative double-hull structure for a drawdown channel.

[0025] in:

[0026] 1 is the stern seawater tank; 2 is the connecting pipe; 3 is the mud tank extraction channel; 4 is the bow square turning round; 5 is the rubber; 6 is the mud door hinge; 7 is the mud pipe;

[0027] 3-1 is the upper top plate of the double-top structure; 3-2 is the lower top plate of the double-top structure; 3-3 is the outer shell of the double-hull structure; 3-4 is the inner shell of the double-hull structure; 3-5 is the round steel of the bottom plate of the double-hull structure; 3-6 is the guide arc plate of the bottom reinforcement structure; 3-7 is the bottom plate of the drawer; 3-8 is the side sealing plate; A is the position without a drawer door; B is the position with a drawer door. DETAILED DESCRIPTION

[0028] To make the present invention more clearly understood, preferred embodiments are described in detail below with reference to the accompanying drawings.

[0029] Example 1

[0030] The present invention provides a V-type mud tank suction channel structure for a trailing suction dredger, such as Figures 1 to 5 As shown, it includes a stern seawater tank 1, a connecting pipe 2, a mud tank pumping channel 3, and a bow square turntable 4. The stern seawater tank 1 is located aft of the mud tank pumping channel 3. The stern seawater tank 1 and the mud tank pumping channel 3 are connected by a connecting pipe 2, which is equipped with a gate valve. In this embodiment, the stern seawater tank 1 is a water diversion valve box; the connecting pipe 2 is a circular tube. The mud tank pumping channel 3 is connected to the mud pipe 7 (mud pump pipeline) at the bow via the bow square turntable 4 to reduce flow resistance. In this embodiment, the bow square turntable 4 is a tubular structure with a circular structure at one end and a square structure at the other.

[0031] The mud tank pumping channel 3 is located just above the mud door, which can ensure that the mud tank is pumped cleanly; in the mud door area, a boss is locally provided on the mud door to ensure that the bottom of the mud tank pumping channel 3 is a plane.

[0032] Among them, one end of the bow square turning circle 4 can be square, or trapezoidal or other polygonal. The bow square turning circle 4 can be made of a separate steel casting or a plurality of wear-resistant plates.

[0033] A wear-resistant plate can be attached to the inner side of the mud tank extraction channel 3, and the wear-resistant plate can be an ordinary marine steel plate or a special wear-resistant steel plate.

[0034] The mud tank extraction channel 3 has a double-shell structure on the sides and a double-roof structure on the top. The channel is smooth and free of protrusions, and the extraction door hinges are hidden behind the double-roof structure. By adopting a double roof and double hull, the present invention ensures that even if cracks appear in the inner shell of the double protective hull, the vessel's functionality will not be affected.

[0035] The height of the double roof structure ranges from 0.13 to 0.4 m. The double roof structure is disconnected at the mud tank drawout door, with a rounded transition on the outside. The width of the double hull structure ranges from 0.13 to 0.4 m. The thickness of both the double roof and double hull structures ranges from 12 to 40 mm. The clear width of the mud tank drawout passage 3 ranges from 0.8 to 1.5 m. The clear height of the mud tank drawout passage 3 ranges from 0.8 to 2 m.

[0036] The mud tank pumping channel 3 includes a double-top structure upper top plate 3-1, a double-top structure lower top plate 3-2, a double-shell structure outer shell 3-3, a double-shell structure inner shell 3-4, a double-shell structure bottom plate round steel 3-5, a bottom reinforcement structure guide arc plate 3-6, a tank pumping bottom plate 3-7, and a side sealing plate 3-8. The double-top structure lower top plate 3-2, the double-shell structure inner shell 3-4, the bottom reinforcement structure guide arc plate 3-6, the tank pumping bottom plate 3-7, and the side sealing plate 3-8 form an internal circulation channel of the mud tank pumping channel 3. A double-top structure upper top plate 3-1 is provided above the double-top structure lower top plate 3-2, and a double-shell structure outer shell 3-3 is provided on the outside of the double-shell structure inner shell 3-4. The double-shell structure inner shell 3-4 is fixedly connected to the double-top structure upper top plate 3-1, the double-top structure lower top plate 3-2, and the tank pumping bottom plate 3-7 respectively, and the double-shell structure outer shell 3-3 is fixedly connected to the double-top structure upper top plate 3-1 and the tank pumping bottom plate 3-7 respectively. In this embodiment, the bottom of the double-shell outer shell 3-3 is connected to the drawer bottom plate 3-7 via the double-shell bottom plate round steel 3-5. The upper portion of the double-top lower plate 3-2 is fixedly connected to the double-top upper plate 3-1 via ribs or reinforcements; the outer side of the double-shell inner shell 3-4 is fixedly connected to the double-shell outer shell 3-3 via ribs or reinforcements. The double-top upper plate 3-1, double-top lower plate 3-2, double-shell outer shell 3-3, double-shell inner shell 3-4, double-shell bottom plate round steel 3-5, bottom reinforcement structure guide arc plate 3-6, drawer bottom plate 3-7, and side sealing plates 3-8 are all plates with smooth inner and outer sides (surfaces in contact with mud).

[0037] The various parts of the mud tank pumping channel 3 are connected by welding to form a uniform flow channel from the stern to the bow. After the mud tank pumping door is opened, the mud is sucked by the mud pump and transported to the bow through the channel. After passing through the bow square circle 4, it is transported to the mud pipe 7 and then discharged to the shore.

[0038] The bottom structure of the mud tank extraction channel 3 (i.e., the mud door hinges and rubber reinforcements in the corners) is longitudinally continuous to ensure the integrity of the flow channel and prevent damage. The bottom structure has a thickness between 12 mm and 45 mm. The bottom structure of the mud tank extraction channel 3 includes a bottom reinforcement guide arc plate 3-6, a extraction bottom plate 3-7, and side sealing plates 3-8.

[0039] The mud tank pumping channel 3 can be welded by backing plate welding through the area that is difficult to weld; the distance between the various components of the mud tank pumping channel 3 can be adjusted according to design requirements.

[0040] The double shell and double roof structure of the mud tank extraction channel 3 can be increased by adding an intermediate plate to increase rigidity. The double roof structure can obtain significant benefits such as easy welding after being rounded, and can make the flow channel smoother, but it can also be straightened.

[0041] The mud tank extraction passage 3 is made into a broken line shape at the position where the mud tank extraction door is provided.

[0042] For difficult local welding locations, backing plate welding or single-sided bevel full penetration welding is used. Optimization algorithms can be used to optimize local plate thickness configuration to ensure a good match between strength and fatigue.

[0043] In a preferred embodiment of the present invention, the width and height of the mud tank pumping channel can be adjusted as needed, and the size of the double hull and the double top can also be adjusted; the size of each component of the mud tank pumping channel 3 can be adjusted according to the actual position of the ship equipment to meet the strength requirements. It is particularly suitable as a pumping channel for giant and super giant V-type mud tank trailing suction hopper dredgers, and is also suitable for W-type mud tank pumping channels, etc., which can effectively reduce the operating costs of ship owners and improve operating efficiency.

[0044] Example 2

[0045] In this embodiment, the stern seawater tank 1 can be eliminated, so that the connecting pipe 2 is directly connected to the outer plate.

[0046] The rest is the same as Example 1.

[0047] Example 3

[0048] like Figure 6 As shown, in this embodiment, the mud tank extraction channel 3 only adopts a double-top structure, changing the double-hull structure to a single-hull structure. The mud tank extraction channel 3 includes a double-top upper plate 3-1, a double-top lower plate 3-2, a double-hull inner hull 3-4, a double-hull bottom plate round steel 3-5, a bottom reinforcement structure guide arc plate 3-6, a tank extraction bottom plate 3-7, and side sealing plates 3-8. Vertical reinforcement ribs or ribs are provided on the outer side of the double-hull inner hull 3-4.

[0049] The rest is the same as Example 1.

Claims

1. A V-type mud tank suction channel structure of a trailing suction hopper dredger, characterized in that: The invention comprises a connecting pipe (2), a mud tank pumping channel (3), and a bow square turn (4); one end of the mud tank pumping channel (3) is connected to one end of the connecting pipe (2); the other end of the mud tank pumping channel (3) is connected to the mud pipe (7) at the bow through the bow square turn (4); the top surface of the mud tank pumping channel (3) is a double-top structure; the inner wall of the double-top structure, the inner side surface of the mud tank pumping channel (3), and the inner bottom surface of the mud tank pumping channel (3) are all smooth surfaces; the mud tank pumping channel (3) is The bottom structure is a longitudinally continuous structure. The bottom structure of the mud tank extraction channel (3) separates the mud door hinge point (6) and the rubber (5) and provides support above the rubber (5); the double-top structure includes a double-top structure lower top plate (3-2) and a double-top structure upper top plate (3-1) located above the double-top structure lower top plate (3-2); the upper part of the double-top structure lower top plate (3-2) is fixedly connected to the double-top structure upper top plate (3-1) through ribs or reinforcement ribs.

2. A V-type mud tank suction channel structure for a trailing suction hopper dredger according to claim 1, characterized in that: The side of the mud tank pumping channel (3) is a double shell structure, and the double shell structure includes a double shell structure outer shell (3-3) and a double shell structure inner shell (3-4). The outer side of the double shell structure inner shell (3-4) is fixedly connected to the double shell structure outer shell (3-3) through ribs or reinforcement ribs. The double shell structure inner shell (3-4) is respectively fixedly connected to the double top structure upper top plate (3-1), the double top structure lower top plate (3-2), and the bottom structure of the mud tank pumping channel (3). The double shell structure outer shell (3-3) is respectively fixedly connected to the double top structure upper top plate (3-1) and the bottom structure of the mud tank pumping channel (3).

3. A V-type mud tank suction channel structure for a trailing suction hopper dredger according to claim 2, characterized in that: The height of the double-top structure is between 0.13 and 0.4 m, the double-top structure is disconnected at the position of the mud tank door, and the outer side of the double-top structure adopts an arc transition; the width of the double shell structure is between 0.13 and 0.4 m; the thickness of the double-top structure and the double shell structure are both between 12 and 40 mm; the net width of the mud tank draw-out channel (3) is between 0.8 and 1.5 m; the net height of the mud tank draw-out channel (3) is between 0.8 and 2 m; and the thickness of the bottom structure of the mud tank draw-out channel (3) is between 12 and 45 mm.

4. The V-type mud tank suction channel structure of a trailing suction hopper dredger according to claim 1, characterized in that: The side surface of the mud tank extraction channel (3) is a single shell structure, and the single shell structure includes a double shell structure inner shell (3-4) and ribs or reinforcing ribs located on the outside of the double shell structure inner shell (3-4) and arranged vertically.

5. The V-type mud tank suction channel structure of a trailing suction hopper dredger according to claim 1, characterized in that: The bottom structure of the mud tank extraction channel (3) comprises a bottom reinforcement structure guide arc plate (3-6), a tank extraction bottom plate (3-7), and a side sealing plate (3-8); the tank extraction bottom plate (3-7) covers the rubber (5); the bottom reinforcement structure guide arc plate (3-6) is arranged above the mud door hinge point (6); the bottom reinforcement structure guide arc plate (3-6) and the tank extraction bottom plate (3-7) are transitionally connected via the side sealing plate (3-8).

6. The V-type mud tank suction channel structure of a trailing suction hopper dredger according to claim 1, characterized in that: The mud tank pumping channel (3) is located directly above the mud door; in the mud door area, a boss is provided locally on the mud door to ensure that the bottom of the mud tank pumping channel (3) is a plane.

7. The V-type mud tank suction channel structure of a trailing suction hopper dredger according to claim 1, characterized in that: The connecting pipe (2) is provided with a gate valve; the stern seawater box (1) is a water diversion valve box; one end of the bow square turning circle (4) is square, trapezoidal, or polygonal.

8. The V-type mud tank suction channel structure of a trailing suction hopper dredger according to claim 1, characterized in that: The bow square turning circle (4) is made of a single steel casting or a plurality of wear-resistant plates spliced ​​together; a wear-resistant plate is attached to the inner side of the mud tank extraction channel (3); and the mud tank extraction channel (3) is a broken line structure at the position where the mud extraction door is located.

9. A V-type mud tank extraction channel structure for a trailing suction hopper dredger according to any one of claims 1 to 8, characterized in that: The other end of the connecting pipe (2) is directly connected to the outer plate.

10. A V-type mud tank extraction channel structure for a trailing suction hopper dredger according to any one of claims 1 to 8, characterized in that: A stern seawater tank (1) is provided at the rear of the mud tank pumping channel (3), and the stern seawater tank (1) is connected to the mud tank pumping channel (3) via a connecting pipe (2).

Images