Bow sunk LNG carrier structure

Abstract

The application discloses a bow sunken LNG ship structure, which comprises a main deck, an aft deck, a bow sunken deck, a ladder, a crane, and cargo cabin outer inclined roofs, wherein the aft deck is arranged at the aft section of the ship, the bow sunken deck is arranged at the bow section of the ship, the main deck is arranged between the bow sunken deck and the aft deck, the height of the main deck is higher than that of the bow lower deck, the ladder is arranged at the position close to the main deck of the bow lower deck, the crane is arranged at one end of the main deck close to the bow lower deck, the bow sunken deck extends from the position close to the aft end of the No.1 cargo cabin to the bow of the ship, and the cargo cabin outer inclined roofs are arranged on the left and right sides of the liquid cargo dome of the No.1 cargo cabin in the direction of the left and right sides. The main deck at the position close to the aft end wall of the No.1 cargo cabin is vertically sunken to form the bow sunken deck, the empty ship mass is effectively reduced, the structural parts are reduced, and the lightweight design of the ship is realized.

Description

Technical Field

[0001] This invention belongs to the field of shipbuilding technology, specifically relating to a bow-submerged LNG carrier structure. Background Technology

[0002] With the booming development of the LNG trading market, a general-purpose ship type has emerged for large LNG carriers—the 170,000 cubic meter class LNG carrier. Major shipyards are constantly optimizing design schemes for the 170,000 cubic meter class LNG carrier to enhance market competitiveness. Although these schemes differ slightly in terms of main dimensions and configurations, the overall layout scheme of the ship type is becoming increasingly mature.

[0003] The booming market has attracted the participation of many shipyards, which has also placed higher demands on ship performance. It is necessary to break through the constraints of the existing general layout scheme and further optimize the overall layout design of the ship in order to achieve a comprehensive improvement in ship performance. Summary of the Invention

[0004] In view of the problems existing in the prior art, the present invention provides a bow-submerged LNG ship structure. The present invention can reduce the empty ship weight, optimize the ship layout, shorten the construction cycle and improve the ship type indicators, thus realizing the lightweight design of the ship.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This invention provides a bow-sinking LNG carrier structure, including a main deck, a stern deck, a bow-sinking deck, a ladder, a crane, and a cargo hold external sloping roof. The stern deck is located at the stern of the ship, the bow-sinking deck is located at the bow of the ship, the main deck is located between the bow-sinking deck and the stern deck, and the height of the main deck is higher than the height of the bow-sinking lower deck. The ladder is located on the bow-sinking lower deck near the main deck. The ladder connects the end of the main deck to the lower bow deck. The crane is located at one end of the main deck near the lower bow deck. The lower bow deck extends from the stern near the No. 1 cargo hold to the bow. The No. 1 cargo hold is the cargo hold closest to the bow of the ship. The liquid cargo dome of the No. 1 cargo hold is provided with an outer sloping roof on both sides in the port and starboard direction. The bottom end of the outer sloping roof of the cargo hold is connected to the main deck and the lower bow deck.

[0007] As a preferred technical solution, two ladders and two cranes are provided, and they are symmetrically arranged on the port and starboard sides of the ship.

[0008] As a preferred technical solution, the ladder is symmetrically arranged along the centerline of the ship.

[0009] As a preferred technical solution, a first isolation compartment is provided at the bow end of the first cargo hold, and a second isolation compartment is provided at the stern end of the first cargo hold.

[0010] As a preferred technical solution, the cargo hold outer sloping roof extends along the length of the ship to the bow bulkhead of the No. 1 isolation compartment.

[0011] As a preferred technical solution, a crew living area and engine room canopy are set up on the main deck located at the engine room position.

[0012] As a preferred technical solution, a corridor area is formed between the outer sloping roof of the cargo hold and the No. 1 cargo hold.

[0013] As a preferred technical solution, the tilt angles of the cargo hold outer sloping roofs located on the main deck and the bow sinking deck are the same.

[0014] Compared with the prior art, the present invention has the following technical effects:

[0015] (1) The intersection of the main deck and the bow sinking deck of the present invention is a vertical sinking type. A ladder is set at this position so that the crew can travel between the main deck and the bow sinking deck. A crane is set up to facilitate the transfer of items between the main deck and the bow sinking deck.

[0016] (2) The present invention vertically sinks the main deck near the stern wall of the No. 1 cargo hold to form a bow-sunken deck. The height of the deck is reduced, and the height range of the bow outer plate is reduced accordingly, which effectively reduces the empty ship weight, reduces the number of structural parts, and realizes the lightweight design of the ship.

[0017] (3) This invention breaks the conventional design pattern of the main deck leading directly to the bow. It connects the main deck and the sunken bow deck through a ladder. By setting up a crane, using ladders for walking and cranes for transporting goods, the connection between the main deck and the sunken bow deck is realized, providing reference and experience for the design of subsequent ships. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the bow-submerged LNG ship structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure at the connection between the main deck and the bow sinking deck of the present invention.

[0021] Figure 3 This is a schematic diagram of the sloping roof structure of the cargo hold of the present invention.

[0022] Figure 4 This is a schematic diagram of the stress in the deck transition region of the present invention, based on the finite element calculation results.

[0023] The specific explanations of the attached diagram labels are as follows: Cargo Hold 1, Isolation Chamber 1, Isolation Chamber 2, Bow of Ship 4, Liquid Cargo Dome 5, Bow Sinking Deck 6, Main Deck 7, Ladder 8, Crew Living Area 9, Engine Room Shed 10, Stern Deck 11, Engine Room 12, Crane 13, Corridor Area 14, Cargo Hold External Sloping Roof 15. Detailed Implementation

[0024] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0025] This invention provides a bow-sinking LNG carrier structure, including a bow-sinking deck 6, a main deck 7, a stern deck 11, a cargo hold external sloping roof 15, a ladder 8, and a crane 13. The main deck 7 is a conventional design for LNG carriers. The stern deck 11 is located at the stern section of the ship, and the bow-sinking deck 6 is located at the bow section. The main deck 7 is located between the bow-sinking deck 6 and the stern deck 11. Starting from the bow end of the stern deck 11, it connects the engine room canopy 10 and the crew living area 9. The engine room canopy 10 is the roof of the engine room 12. In this embodiment, the height of the main deck 7 is higher than the height of the bow-sinking deck 6. The bow-sinking deck 6 is a conventional design where the main deck 7 extends to a position near the stern wall of the first cargo hold 1, sinks vertically, and then maintains a constant height, extending to the bow section 4 to form the bow-sinking deck. The aforementioned ladder 8 is located at the junction of the main deck 7 and the bow sinking deck 6. The main body of ladder 8 is mounted on the bow sinking deck 6, eliminating the impact of the vertical sinking between the main deck 7 and the bow sinking deck 6 and ensuring the continuity of passageways on both sides of the ship. The aforementioned crane 13 is located at the intersection of the main deck 7 and the bow sinking deck 6. The main body of crane 13 is mounted on the main deck 7. The installation of crane 13 can eliminate the impact of the vertical sinking between the main deck 7 and the bow sinking deck 6, ensuring continuous and convenient passage of goods on both sides of the ship.

[0026] The lower bow deck 6 extends from the stern of cargo hold 1 to the bow. Cargo hold 1 is the cargo hold closest to the bow 4. A first isolation compartment 2 is located at the bow of cargo hold 1, and a second isolation compartment 3 is located at the stern. The liquid cargo dome 5 of cargo hold 1 has external sloping roofs 15 extending outwards on both sides in the port and starboard directions. The bottom of the external sloping roofs 15 connects to the main deck 7 and the lower bow deck 6. The external sloping roofs 15 extend along the bow direction to the bow bulkhead of the first isolation compartment 2. The external area where the external sloping roofs 15 intersect with the lower bow deck forms the external walkway of cargo hold 1. The extended arrangement of the external sloping roof structure of cargo hold 1 determines the width and size of the walkways on both sides of the cargo hold area of ​​the lower bow deck 6. The cargo hold outer sloping roof 15 structure at the bow sinking deck 6 of cargo hold 1 is an extension of the cargo hold outer sloping roof 15 in the main deck 7 area, without changing the form of the cargo hold outer sloping roof 15, and forms a corridor area 14 between the cargo hold outer sloping roof 15 and cargo hold 1.

[0027] In this embodiment, two ladders 8 and two cranes 13 are provided, and they are symmetrically arranged on the port and starboard sides of the ship. The cranes 13 and the ladders 8 are symmetrically arranged along the centerline of the ship.

[0028] After the structural design of this embodiment was completed, the specifications for Cargo Hold 1 and the bow structure were checked and the structural finite element strength analysis was performed. Because the bow sinking deck 6 and the main deck 7 are discontinuous, resulting in a loss of the overall longitudinal section modulus in the transition area, the specifications for checking need to focus on evaluating the overall longitudinal strength at this location. The structural finite element strength analysis needs to focus on examining the structural abrupt changes at the aft wall of Cargo Hold 1 and the transition point between Cargo Hold 1 and the bow structure. Figure 4 The strength verification results of the key structural transition area are shown in the figure. The strength of the key structural transition area of ​​the ship meets the ship strength standard after testing. Therefore, the design scheme of the present invention is practically feasible. The main deck 7 near the stern end wall of cargo hold 1 is vertically sunk to form a bow sunken deck. The height of the deck is reduced, and the height range of the bow outer plate is reduced accordingly, which effectively reduces the empty ship weight, reduces the number of structural parts, and realizes the lightweight design of the ship.

[0029] Although the above embodiments have provided a detailed description of the present invention, it should be understood by those skilled in the art that modifications or improvements can be made based on the disclosure of the present invention without departing from the spirit and scope of the invention, and such modifications and improvements are all within the spirit and scope of the present invention.

Claims

1. A bow sunk LNG carrier structure, characterized by, The utility model provides a ship, including main deck, stern deck, bow sunken deck, ladder, crane, cargo hold outer slope roof, the stern deck sets up in the stern section of ship, the bow sunken deck sets up in the bow section of ship, the main deck sets up between bow sunken deck and stern deck, the height of main deck is higher than the height of bow sunken deck and stern deck, and the crew living area and engine room shed are arranged on the main deck at engine room position, and the main deck is connected with engine room shed and crew living area from the bow end of stern deck, and the engine room shed is the top of engine room, the ladder is arranged at the position close to main deck of bow sunken deck, and the ladder is connected with the end of main deck and bow sunken deck, and the crane is arranged at one end of main deck close to bow sunken deck, and the bow sunken deck extends from the position close to the stern end of no.

2. A bow sunk LNG carrier structure as claimed in claim 1, characterized in that, The ladder and the crane are each provided with two, and two two symmetrically set up in the port side and starboard of ship.

3. A bow sunk LNG carrier structure as claimed in claim 2, wherein The ladder is symmetrically arranged along the centerline of the ship.

4. A bow sunk LNG carrier structure as claimed in claim 1, wherein, The bow end of the first cargo hold is provided with a first isolation cabin, and the stern end of the first cargo hold is provided with a second isolation cabin.

5. A bow sunk LNG carrier structure as claimed in claim 1, wherein, The cargo hold outer slope roof extends to the bow end wall of the first isolation cabin along the direction of the ship length.

6. A bow sunk LNG carrier structure as claimed in claim 1, wherein, The cargo hold outer slope roof and the first cargo hold form a corridor area.

7. A bow sunk LNG carrier structure as claimed in claim 1, wherein, The inclination angles of the cargo hold outer slope roofs at the main deck and the bow sunken deck are the same.

Images