Arrangement structure of fuel oil tank of bulk cargo ship and bulk cargo ship

Abstract

The embodiment of the invention provides an arrangement structure of a fuel oil tank of a bulk carrier and the bulk carrier, and the arrangement structure of the fuel oil tank comprises the fuel oil tank which is arranged between an engine room and a tail cargo hold and is an area below a main deck; the front wall position and the rear wall position of the fuel oil tank are determined according to the main scale of the bulk cargo ship and the tank capacity requirement of the fuel oil tank; the fuel oil tank is provided with an inclined bottom on the upper portion of the tail cargo tank, the inclined bottom and the horizontal plane form a set included angle, the inclined bottom is transversely arranged and divided into a left tank and a right tank with the middle longitudinal section, and isolation void tanks are arranged on the two sides. The cargo space is effectively utilized, the capacity of the ballast tank is improved, tank cleaning, depth measurement and pipeline arrangement are facilitated, meanwhile, the length of an isolation void tank is shortened, the fuel oil leakage risk is reduced, and the requirements for endurance and environmental protection regulations are met.

Description

Technical Field

[0001] This invention relates to the field of ship design technology, and in particular to an arrangement structure of fuel tanks for bulk carriers and a bulk carrier, applicable to bulk carriers that need to meet fuel tank capacity, range, and international maritime environmental regulations. Background Technology

[0002] Currently, the fuel tanks of common green and environmentally friendly bulk carriers are generally located in the top side tanks on the stern corresponding to the cargo holds, with an isolation compartment between them and the outer hull plating to prevent fuel tank leakage in case of damage. For details, please refer to... Figures 1 to 3 As shown in the diagram. However, this arrangement has the following problems: First, due to the angle between the bottom of the top side tank and the horizontal plane, the bottom of the fuel tank is not horizontal, resulting in limited space and making depth measurement difficult; second, the fuel tank occupies a large portion of the space that could have been used as ballast tanks, making it difficult for the bulk carrier to meet the ballast draft requirements, affecting the ship's stability and operational efficiency. Therefore, an improved fuel tank arrangement is needed to solve the above problems. Summary of the Invention

[0003] In view of the above-mentioned problems existing in the prior art, the present invention provides an arrangement structure of fuel tanks for bulk carriers and a bulk carrier, which can not only meet the fuel tank capacity requirements for endurance, but also comply with the international maritime code for fuel tank protection, while facilitating structural strength design and fuel pipeline layout.

[0004] This invention provides an arrangement structure for the fuel tanks of a bulk carrier, comprising: The fuel tank is located between the engine room and the aft cargo hold, and is situated below the main deck. The positions of the forward and aft walls of the fuel tanks are determined based on the main dimensions of the bulk carrier and the fuel tank capacity requirements. The fuel tank has a sloping bottom above the tail cargo hold, and the sloping bottom is set at a certain angle to the horizontal plane.

[0005] In some embodiments of the present invention, the sloping bottom is set at an angle of 25°-35° to the horizontal plane.

[0006] In some embodiments of the invention, the angle of inclination of the sloping bottom matches the angle of repose of the upper surface of the dry bulk cargo.

[0007] In some embodiments of the present invention, the fuel tank is arranged laterally along the ship. In some embodiments of the present invention, the fuel tank is divided into left and right compartments in a mid-longitudinal section.

[0008] In some embodiments of the present invention, the fuel tank is provided with isolation compartments on both sides, which are separated from the outer side plating.

[0009] In some embodiments of the present application, the aft end of the fuel tank extends to the front end wall of the superstructure.

[0010] In some embodiments of the present application, when the fuel tank is insufficient in capacity, the fuel tank extends to the front end wall of the superstructure, and the fuel tank partially extends into the front end wall of the superstructure, and the superstructure and the fuel tank do not have a common boundary.

[0011] In some embodiments of the present application, the bottom of the fuel tank is flat near the tail end of the engine room area.

[0012] Compared with the prior art, the arrangement structure of the fuel tank of the bulk cargo ship provided by the embodiments of the present application has the following beneficial effects: 1. The upper space of the cargo tank is effectively utilized, the space is maximally utilized in cooperation with the characteristics of the 30° rest angle of the dry bulk cargo, and the requirement of the rest angle of the upper surface of most dry bulk cargo is matched; 2. The top edge tank corresponding to the original tail cargo tank is changed into a ballast water tank, conditions are created for reducing the height of the double bottom or setting the stern peak tank as a hollow tank, and the bending moment of the ship beam in still water under the ballast condition is effectively reduced; 3. The fuel tank is inclined by 30° and flat at the tail end of the engine room area, which is convenient for cleaning, depth measurement and fuel pipeline arrangement; 4. The fuel tank is arranged along the transverse direction, the length of the side isolation hollow tank is shortened, the risk of collision and damage of the side plate and fuel overflow is reduced, and the environmental protection performance is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 FIG. 1 is a longitudinal section view of the tail cargo tank and the tail end engine room area of an existing large bulk cargo ship; Figure 2 FIG. 2 is a main deck arrangement view of the tail cargo tank and the tail end engine room area of an existing large bulk cargo ship; Figure 3 FIG. 3 is a transverse section view of the position of the fuel tank corresponding to the tail cargo tank of an existing large bulk cargo ship; Figure 4 FIG. 4 is a longitudinal section view of the position of the fuel tank in the arrangement structure of the fuel tank of the bulk cargo ship provided by the embodiments of the present application; Figure 5 FIG. 5 is a main deck arrangement view of the position of the fuel tank in the arrangement structure of the fuel tank of the bulk cargo ship provided by the embodiments of the present application; Figure 6 FIG. 6 is a transverse section view of the engine room front wall of the position of the fuel tank in the arrangement structure of the fuel tank of the bulk cargo ship provided by the embodiments of the present application; Figure 7 FIG. 7 is a longitudinal section view of the fuel tank extending to the front end wall of the superstructure in the arrangement structure of the fuel tank of the bulk cargo ship provided by the embodiments of the present application. DETAILED DESCRIPTION

[0014] For better understanding of the technical solutions of the present application, the present application will be described in detail below in combination with the drawings and specific embodiments.

[0015] The various aspects and features of the present application are described herein with reference to the accompanying drawings.

[0016] These and other characteristics of the present application will become apparent from the following description of the preferred forms given, by way of non-limiting example, with reference to the attached drawings.

[0017] It is also to be understood that even though a number of specific embodiments of the present application have been described herein, many other modifications and / or

[0018] The above and other aspects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which:

[0019] Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it is to be understood that the embodiments described are merely exemplary of the present application and can be embodied in various forms. Well-known and / or redundant functions and structures are not described in detail to avoid obscuring the present application in unnecessary detail. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and a representative basis for teaching one skilled in the art to variously employ the present application in virtually any appropriately detailed structure.

[0020] The specification can use phrases like "in one embodiment", "in another embodiment", "in yet another embodiment", or "in other embodiments", which can refer to one or more of the same or different embodiments of the application.

[0021] Embodiments of the present application provide a bulk carrier fuel oil tank arrangement, as shown in Figures 4 to 7 comprising: a fuel oil tank arranged between the engine room and the aft cargo tank, and being a region below the main deck; the front wall position and the rear wall position of the fuel oil tank are determined according to the main dimensions of the bulk carrier and the fuel oil tank capacity requirement; the fuel oil tank has a sloping bottom above the aft cargo tank, the sloping bottom being arranged at a set angle with the horizontal plane. In the present embodiment, the sloping bottom is arranged at an angle of 25°-35° with the horizontal plane.

[0022] In some embodiments of the present application, the inclination angle of the inclined bottom matches the angle of repose of the dry bulk cargo.

[0023] In the present embodiment, the fuel bunker is arranged along the transverse direction of the ship. The fuel bunker is divided into left and right two parts by the center longitudinal section. Specifically, the fuel bunker is provided with an empty partition cabin on both sides, which is separated from the side plate.

[0024] In some embodiments of the present application, the tail of the fuel bunker extends to the front end wall of the superstructure. When the fuel bunker capacity is insufficient, the fuel bunker is extended to the front end wall of the superstructure, and the fuel bunker part extends into the front end wall of the superstructure, so as to avoid the superstructure and the fuel bunker having a common boundary.

[0025] In order to facilitate the understanding of the above technical solutions, the following will be described in detail in conjunction with the drawings and specific examples as follows: The arrangement structure of the fuel bunker of the bulk cargo ship provided by the embodiment of the present application moves the conventional fuel bunker arrangement of the bulk cargo ship from the top edge cabin position corresponding to the tail cargo cabin to the top near the engine cabin front wall behind the tail cargo cabin, and is arranged along the transverse direction of the ship. The specific implementation steps are as follows: After a part of the watertight bulkhead is made from the main deck at the position of the transverse hatch coaming beam of the original tail cargo cabin, the inclined bottom is made in the direction of about 30° downward to the engine cabin area, and is changed to the horizontal direction as the bottom of the fuel bunker at a certain position. Considering the main dimensions of various bulk cargo ships and the different requirements for the capacity of the fuel bunker, the positions of the front and rear walls of the fuel bunker can be adjusted according to the specific circumstances; the fuel bunker is made into an inclined bottom with an angle of about 30° with the horizontal plane at the upper part of the tail cargo cabin, which on the one hand tries to occupy as little cargo space as possible, and on the other hand matches the requirement of the angle of repose of most dry bulk cargo. This design not only reduces the occupation of cargo space, but also matches the angle of repose of the bulk cargo, which is convenient for cargo loading.

[0026] The fuel bunker is divided into left and right two parts by the center longitudinal section, and an empty partition cabin is arranged on both sides to be separated from the outer plate, so as to ensure the safe isolation between the fuel bunker and the side plate and reduce the risk of collision and leakage.

[0027] The tail of the fuel bunker generally extends to the front end wall of the superstructure. If the fuel bunker capacity is insufficient to meet the requirement of the endurance, the fuel bunker can be extended to the front end wall of the superstructure, but the superstructure and the fuel bunker should not have a common boundary, such as shown in Figure 7 , so as to ensure the safety of the structure and the compliance with the regulations.

[0028] The arrangement structure of the fuel tank of the bulk cargo ship provided by the above embodiment of the present application effectively utilizes the upper space of the cargo hold, matches the characteristics of the 30-degree repose angle of the bulk cargo, maximizes the use of space, and matches the requirements of the repose angle of the upper surface of most dry bulk cargos; meanwhile, the top side hold corresponding to the original stern cargo hold is changed into a ballast water tank, which creates conditions for reducing the height of the double bottom or setting the stern peak hold as an empty hold, effectively reduces the bending moment of the ship beam in still water under the ballast working condition; further, the fuel tank is inclined by 30 degrees and is provided with a flat bottom near the engine room area at the stern, which facilitates cleaning, depth measurement, and fuel pipeline arrangement; in addition, the fuel tank is arranged along the transverse direction, which shortens the length of the side isolation empty hold, reduces the risk of collision and damage of the side plate and external spillage of fuel, and improves the environmental protection performance.

[0029] The present application optimizes the position and structure of the fuel tank, realizes efficient utilization of tank capacity, improves structural strength, and improves environmental protection performance, and is suitable for various bulk cargo ships.

[0030] The embodiment of the present application also provides a bulk cargo ship which adopts the arrangement structure of the fuel tank of the bulk cargo ship as described in the embodiment, has all the beneficial effects of the arrangement structure of the fuel tank of the bulk cargo ship, effectively utilizes the upper space of the cargo hold, matches the characteristics of the 30-degree repose angle of the bulk cargo, maximizes the use of space, and matches the requirements of the repose angle of the upper surface of most dry bulk cargos; meanwhile, the top side hold corresponding to the original stern cargo hold is changed into a ballast water tank, which creates conditions for reducing the height of the double bottom or setting the stern peak hold as an empty hold, effectively reduces the bending moment of the ship beam in still water under the ballast working condition; further, the fuel tank is inclined by 30 degrees and is provided with a flat bottom near the engine room area at the stern, which facilitates cleaning, depth measurement, and fuel pipeline arrangement; in addition, the fuel tank is arranged along the transverse direction, which shortens the length of the side isolation empty hold, reduces the risk of collision and damage of the side plate and external spillage of fuel, and improves the environmental protection performance.

[0031] The above embodiments are only exemplary embodiments of the present application and are not used to limit the present application, and the protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present application within the spirit and protection scope of the present application, and such modifications or equivalent replacements are also regarded as falling within the protection scope of the present application.

Claims

1. An arrangement of fuel oil tanks for a bulk carrier, c h a r a c t e r i s e d in that Comprising: a fuel oil tank arranged between the engine room and the aft cargo tank, and for the area below the main deck; the front wall position and the rear wall position of the fuel oil tank are determined according to the main dimensions of the bulk carrier and the fuel oil tank capacity requirement; the fuel oil tank has a sloping bottom on the upper part of the aft cargo tank, and the sloping bottom is arranged at a set angle with the horizontal plane.

2. The arrangement of the fuel oil tank of the bulk carrier according to claim 1, wherein the sloping bottom is arranged at an angle of 25°-35° with the horizontal plane.

3. The arrangement of the fuel oil tank of the bulk carrier according to claim 1, wherein the sloping angle of the sloping bottom matches the angle of repose of the dry bulk cargo.

4. The arrangement of the fuel oil tank of the bulk carrier according to claim 1, wherein the fuel oil tank is arranged along the transverse direction of the ship.

5. The arrangement of the fuel oil tank of the bulk carrier according to claim 1, wherein the fuel oil tank is divided into left and right tanks by the center longitudinal plane.

6. The arrangement of the fuel oil tank of the bulk carrier according to claim 5, wherein both sides of the fuel oil tank are provided with an empty tank for separation, and are separated from the side plate.

7. The arrangement of the fuel oil tank of the bulk carrier according to claim 1, wherein the aft part of the fuel oil tank extends to the front end wall of the superstructure.

8. The arrangement of the fuel oil tank of the bulk carrier according to claim 7, wherein when the fuel oil tank capacity is insufficient, the fuel oil tank is extended to the front end wall of the superstructure, and the fuel oil tank part extends into the front end wall of the superstructure, and the superstructure and the fuel oil tank do not have a common boundary.

9. The arrangement of the fuel oil tank of the bulk carrier according to claim 1, wherein the bottom of the fuel oil tank is flat near the engine room area at the aft part.

10. A bulk carrier, characterized by Comprising: the bulk carrier adopts the arrangement of the fuel oil tank of the bulk carrier according to any one of claims 1 to 9.

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