A container ship with built-in B-type holds

Abstract

A kind of unshielded container ship built-in B type cabin, container ship is provided with B type cabin, the B type cabin is continuously arranged along the length direction, the top of the B type cabin is outwardly convex, higher than the highest point of the hull topside structure;The bottom of the B type cabin is oblique at the hull bilge portion protruding structure, and is oblique;Stop floating and rocking member is arranged between the sidewall of the B type cabin and the topside structure, folding rainproof structure is fixed above the stop floating and rocking member, and a plurality of stop floating and rocking members and the folding rainproof structure are arranged at equal intervals along the circumference of the B type cabin.The B type cabin of the present application protrudes above the deck and is exposed outside the hull structure, which increases the loading capacity of the B type cabin by 2 times of the traditional scheme, improves the LNG loading rate, and also maximizes the utilization rate of the container ship's cargo capacity, simplifies the construction process, reduces the weight of the empty ship, and achieves higher economic benefits.

Description

Technical Field

[0001] This invention belongs to the field of shipbuilding and design, and specifically relates to an unshielded container ship with an internal B-type compartment. Background Technology

[0002] like Figure 1 , 2 The diagram shows the structure of a container ship when it is fully loaded and empty.

[0003] With the advancement of green energy, the demand for LNG transport capacity is rising. However, LNG carriers are expensive to manufacture and take too long to build. If surplus large container ships could be converted into LNG carriers, it would bring huge economic benefits and solve the problem of excess container transport capacity.

[0004] Figure 3 This is a schematic diagram of an existing container ship conversion structure. The traditional design places the B-type hold inside the container ship's cargo hold. However, due to the steps inside the container ship used for container placement, its utilization rate is low. If the container ship hatch cover is not designed, exposing the B-type hold to the deck, the cargo capacity of the container ship converted into an LNG carrier can be significantly increased. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides an unobstructed built-in Type B hold for container ships, the technical solution of which is as follows:

[0006] An unshielded container ship has an internal B-type compartment. The container ship is equipped with B-type compartments arranged continuously along the length of the ship. The top of the B-type compartment protrudes outward, above the highest point of the ship's freeboard structure. The bottom sides of the B-type compartment are beveled at the bilge protrusions.

[0007] A buoyancy-stabilizing and anti-rolling component is provided between the sidewall of the B-type cabin and the freeboard structure. A foldable rainproof structure is fixed above the buoyancy-stabilizing and anti-rolling component. Multiple buoyancy-stabilizing and anti-rolling components and the foldable rainproof structure are arranged at equal intervals along the circumference of the B-type cabin.

[0008] The anti-buoyancy and anti-rolling component includes two L-shaped stoppers. One of the stoppers is placed upright and fixed to the freeboard structure, while the other stopper is placed upside down and fixed to the side wall of the B-type cabin. The two stoppers are joined together to form a square shape. A support block is provided between the two stoppers. One side of the support block is bonded to one of the stoppers, and the other side has a gap with the other stopper.

[0009] The folding rainproof structure includes two hinges, one of which opens upwards and the other opens downwards. The two hinges are joined together to form a complete folding structure. One end of the folding structure is fixed to the freeboard structure, and the other end is slidably connected to the sidewall of the B-type cabin.

[0010] Furthermore, in the aforementioned unshielded container ship built-in Type B compartment, the Type B compartment has a slot fixed on its side wall, and the end of the folding structure has a ball bearing located in the slot and slidably connected to the slot.

[0011] The aforementioned unshielded container ship with built-in Type B compartments further includes a Type B compartment with an air dome at the top, and the top bulkhead of the Type B compartment gradually slopes downward from the air dome to both sides.

[0012] Furthermore, in the aforementioned unshielded container ship built-in Type B compartment, the bottom of the Type B compartment is fixed inside the container ship by a vertical support structure, which is arranged along the length of the ship at the bottom of the Type B compartment.

[0013] Furthermore, the aforementioned unshielded container ship has a built-in Type B compartment, the outer surface of which is covered with an insulating layer.

[0014] Furthermore, in the aforementioned type B container ship with an unshielded interior, the top and bottom inner walls of the type B container are provided with several sets of strong frames, and a reinforcing beam structure is provided above the strong frames.

[0015] The aforementioned unshielded container ship has a built-in Type B compartment, and furthermore, the bottom of the hull is equipped with a water intake well.

[0016] The aforementioned unshielded container ship with built-in Type B compartment further specifies that the inclination angle of the top bulkhead of the Type B compartment is β, where 30° < β < 60°.

[0017] Furthermore, in the aforementioned unshielded container ship built-in Type B hold, the extension line of the top bulkhead of the Type B hold towards the freeboard structure intersects with the horizontal line at the top of the freeboard structure, forming an intersection point C. The distance between intersection point C and the freeboard structure is greater than 300mm.

[0018] The aforementioned unshielded container ship has a built-in Type B compartment, and furthermore, the cross-section of the strong frame is T-shaped.

[0019] Container ships are characterized by large openings, high freeboard, and minimal internal structure, providing ample space for flexible modifications. The function of transporting liquefied LNG can be achieved by installing several Type B tanks within the container ship. This invention presents a Type B tank scheme for converting a container ship into an LNG carrier. Unlike other conversion schemes, its Type B tanks protrude above the deck and are exposed outside the hull structure, doubling the loading capacity of traditional methods, thus increasing the LNG loading rate. Furthermore, it leverages the existing cargo capacity of the container ship, maximizing cargo utilization, simplifying construction processes, reducing empty ship weight, and achieving higher economic efficiency. Attached Figure Description

[0020] Figure 1 A cross-sectional layout diagram of a container ship when fully loaded;

[0021] Figure 2 This is a cross-sectional layout of a container ship when it is empty.

[0022] Figure 3 A cross-sectional view of a retrofit plan for an existing container ship with a B-type compartment;

[0023] Figure 4 This is a side view sectional structural diagram of one of the compartments of the LNG carrier after the modification according to the present invention.

[0024] Figure 5 for Figure 4 Schematic diagram of the structure from the perspective of AA;

[0025] Figure 6 The outline of the B-type cabin before and after structural modifications;

[0026] Figure 7 Detailed diagram of the bilge protrusion structure and the expanded B-type cabin;

[0027] Figure 8 Diagram showing the connection between the expanded Type B cabin above deck and the freeboard;

[0028] Figure 9 Schematic diagram of foldable rainproof structure and anti-buoyancy and anti-sway components;

[0029] Among them, 1-freeboard structure, 2-bilge protrusion structure, 6-Type B cabin, 7-air dome, 8-vertical support structure, 9-support block, 10-stopping component, 11-insulation layer, 12-slot, 14-folding rainproof structure, 15-buoyancy and anti-roll component, 16-hinge. Detailed Implementation

[0030] The invention will be further described with reference to the accompanying drawings.

[0031] An unshielded container ship with built-in Type B compartments, such as... Figure 4 , 5 As shown, the container ship eliminates the hatch coaming structure. The container ship's interior features B-type compartments 6, arranged continuously along the ship's length. The top of the B-type compartment protrudes outwards, exceeding the highest point of the ship's freeboard structure 1. The bottom sides of the B-type compartment are beveled at the bilge protrusions 2. To prevent interference between the B-type compartment and the bilge protrusions, the width of the B-type compartment cannot exceed the sidewalls of the bilge protrusions, thus reducing its capacity. To increase the B-type compartment's capacity, the angle of the sidewalls is increased, overcoming the bilge protrusion limitation. This allows for an increase in the width of the B-type compartment, while simultaneously eliminating the B-type compartment's roof structure, allowing the B-type compartment to protrude to the highest point of the freeboard structure.

[0032] A buoyancy-damping and anti-rolling component 15 is installed between the sidewall of the Type B cabin and the freeboard structure. A folding rainproof structure is fixed above the buoyancy-damping and anti-rolling component. Multiple buoyancy-damping and anti-rolling components and folding rainproof structures 14 are evenly spaced along the circumference of the Type B cabin. The buoyancy-damping and anti-rolling components prevent the Type B cabin from buoying when there is water at the bottom of the cabin, and at the same time limit the rolling of the Type B cabin.

[0033] The anti-buoyancy and anti-rolling component includes two L-shaped stoppers 10. One stopper is placed upright and fixed to the freeboard structure, while the other stopper is placed upside down and fixed to the side wall of the B-type cabin. The two stoppers form a square when joined together. A support block 9 is provided between the two stoppers. One side of the support block is bonded to one of the stoppers, and the other side has a gap with the other stopper.

[0034] like Figure 9 As shown, the folding rainproof structure includes two hinges 16, one opening upwards and the other downwards. The two hinges are joined at their ends to form a complete folding structure. The two hinges are connected by a rigid composite material. One end of the folding structure is fixed to the freeboard structure, and the other end is slidably connected to the sidewall of the B-type compartment. A groove 12 is fixed on the sidewall of the B-type compartment, and the end of the folding structure has ball bearings located within and slidably connected to the groove. This prevents rainwater from entering the hull when the B-type compartment expands or contracts. One anti-roll and anti-buoyancy component is welded to the hull liner, and the other is welded to the B-type compartment. This structure has dual functions of anti-roll and anti-buoyancy. Wooden blocks are glued to the anti-roll and anti-buoyancy structure welded to one side of the B-type compartment. Because the Type B cabin expands under pressure and rises and falls within the cabin, this folding rainproof structure only protects against rain and does not have a buoyancy limit. Therefore, a sliding section needs to be installed on the other side so that it can move up and down with the Type B cabin, and can also act as a rainproof structure in any state.

[0035] The Type B cabin features an air dome 7 at the top. The bulkhead of the Type B cabin slopes gradually downwards from the air dome to both sides, with an inclination angle of β, where β = arctan(2*H⁴ / (B + 2*ΔB - B₁)), 30° < β < 60°. The extension line of the Type B cabin's bulkhead towards the freeboard structure intersects the horizontal line at the top of the freeboard structure, forming an intersection point C. The distance from intersection point C to the freeboard structure is greater than 300mm. The protruding Type B cabin's bulkhead adopts a two-sided sloping structure, such as... Figure 8 As shown, the angle of inclination extends beyond the outermost structure of the freeboard, allowing water to flow directly outwards when there is accumulation. Modifications to the B-type hold eliminate the volume restriction imposed by the bilge protrusions on the B-type hold, increasing its capacity. The vertical support structure is arranged along the ship's length at the bottom of the B-type hold.

[0036] The bottom of the B-type compartment is secured to the interior of the container ship via a vertical support structure.

[0037] The outer surface of the B-type cabin is covered with an insulating layer 11.

[0038] The top and bottom inner walls of the B-type cabin are equipped with several sets of strong frames, and a reinforcing beam structure is installed above the strong frames. The cross-section of the strong frames is T-shaped.

[0039] like Figure 6 The diagram shows the changes in the outline of the Type B cabin before and after modification. The dashed lines represent the outline of the Type B cabin before the bilge modification, and the solid lines represent the outline of the Type B cabin after the bilge protrusion structure modification. In the diagram, H represents the height of the Type B cabin, ΔB represents the change in the width of one side of the Type B cabin before and after modification, ΔB1 ​​represents the width of the sloping top of the Type B cabin before modification, H2 represents the height of the sloping top of the Type B cabin on one side, H1 represents the height of the parallel side section of the Type B cabin after modification, H3 represents the height of the parallel side section of the protruding deck portion of the Type B cabin after modification, and H4 represents the height of the sloping top of the Type B cabin on one side after modification, with an inclination angle of β.

[0040] Figure 7 The image shows a detailed view of the bilge protrusion and the Type B cabin. The Type B cabin is a hollow, sealed cavity with a trapezoidal upper section and an inverted trapezoidal lower section that avoids the bilge protrusion. The distance between the Type B cabin and the apex of the bilge protrusion is no less than 0.7m. The formula for calculating the inclination angle α of the inverted trapezoidal portion of the Type B cabin is as follows:

[0041] α=90°+arcsin(d1 / d2) (1)

[0042] Where: d1——the distance from the apex of the protruding platform to the edge of the expanded Type B cabin;

[0043] d2 – The distance between the sidewall of the protruding platform and the edge of a traditional Type B cabin;

[0044] Before and after the conversion of the B-type cabin, the increase in cabin volume ΔV per meter of the B-type cabin is calculated using the following formula:

[0045] ΔV=ΔB*(H1+H)+ΔB1*H2+H3*(ΔB*2+B)+0.5*(B1+ΔB*2+B)*H4

[0046] In the formula: H is the height inside the B-type cabin.

[0047] ΔB is the difference in width on one side between the B-type cabin and the B-type cabin.

[0048] ΔB1 is the width of one side of the beveled top of the B-type cabin.

[0049] H2 is the height of one side of the sloping top of the B-type cabin.

[0050] H1 is the height of the section of the interior of the Type B cabin that is parallel to the freeboard.

[0051] B represents the width of a B-type cabin.

[0052] H3 is the height of the section of the B-type cabin that is parallel to the freeboard.

[0053] H4 is the height of one side of the sloping top of the B-type cabin.

[0054] B1 is the width of the portion of the B-type cabin that is parallel to the baseline outside the cabin.

[0055] The expanded Type B compartment protrudes from the deck and is covered by an insulation layer, eliminating the need for a top structure.

[0056] This invention changes the structural form of the B-type compartment by tilting the side walls of the B-type compartment to eliminate the restrictions imposed on the arrangement of the B-type compartment by the protruding structure of the bilge of the container ship, while also making the B-type compartment protrude from the deck structure, thereby increasing the capacity of the B-type compartment.

[0057] This invention utilizes the characteristics of container ships by protruding the B-type compartment above the deck, thereby increasing the loading capacity of the B-type compartment. At the same time, it can utilize the space above the deck of the container ship for loading, achieving a utilization rate of nearly 2 times.

[0058] This solution enables the conversion of container ships into LNG carriers, which has a huge market potential and can bring considerable economic benefits.

Claims

1. An unshielded container ship built-in Type B compartment, characterized in that, The container ship is equipped with Type B compartments, which are arranged continuously along the length of the ship. The top of the Type B compartments protrudes outward and is higher than the highest point of the ship's freeboard structure. The bottom sides of the Type B compartments are beveled at the bilge structures of the ship. A buoyancy-stopping and anti-rolling component is provided between the sidewall of the B-type cabin and the freeboard structure. A folding rainproof structure is fixed above the buoyancy-stopping and anti-rolling component. Multiple buoyancy-stopping and anti-rolling components and the folding rainproof structure are arranged at equal intervals along the circumference of the B-type cabin. The anti-buoyancy and anti-rolling component includes two L-shaped stoppers. One of the stoppers is placed upright and fixed to the freeboard structure, while the other stopper is placed upside down and fixed to the side wall of the B-type cabin. The two stoppers are joined together to form a square shape. A support block is provided between the two stoppers. One side of the support block is bonded to one of the stoppers, and there is a gap between the other side and the other stopper. The folding rainproof structure includes two hinges, one of which opens upward and the other opens downward. The two hinges are joined end to end to form a complete folding structure. One end of the folding structure is fixed to the freeboard structure, and the other end is slidably connected to the side wall of the B-type cabin. The B-type cabin sidewall is fixed with a slot, and the end of the folding structure is equipped with a ball bearing. The ball bearing is located in the slot and is slidably connected to the slot. The top of the Type B cabin is equipped with an air dome, and the top and sides of the Type B cabin gradually slope downward from the air dome. The extension line of the top bulkhead of the Type B cabin towards the freeboard structure intersects with the horizontal line at the top of the freeboard structure, forming an intersection point C. The distance between intersection point C and the freeboard structure is greater than 300mm. The angle of the extension line is greater than that of the outermost edge of the freeboard structure, which allows water to flow directly to the outside of the ship when there is water accumulation.

2. The unshielded container ship built-in Type B hold according to claim 1, characterized in that, The bottom of the B-type compartment is fixed inside the container ship by a vertical support structure, which is arranged along the length of the ship at the bottom of the B-type compartment.

3. The unshielded container ship built-in Type B hold according to claim 1, characterized in that, The outer surface of the B-type cabin is covered with an insulating layer.

4. The unshielded container ship built-in Type B hold according to claim 1, characterized in that, The top and bottom inner walls of the B-type cabin are provided with several sets of strong frames, and a reinforcing beam structure is provided above the strong frames.

5. The unshielded container ship built-in Type B compartment according to claim 1, characterized in that, The bottom of the hull is equipped with a water intake well.

6. The unshielded container ship built-in Type B hold according to claim 1, characterized in that, The tilt angle of the top and bulkhead of the Type B cabin is β, where 30° < β < 60°.

7. The unshielded container ship built-in Type B hold according to claim 4, characterized in that, The cross-section of the strong frame is T-shaped.

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