WO2023130602A1

WO2023130602A1 - Convex deck structure and liquefied gas carrier

Info

Publication number: WO2023130602A1
Application number: PCT/CN2022/086406
Authority: WO
Inventors: 周清华; 陈兵; 柳一点; 胡可一
Original assignee: 江南造船(集团)有限责任公司
Priority date: 2022-01-07
Filing date: 2022-04-12
Publication date: 2023-07-13
Also published as: CN114132431A

Abstract

A convex deck structure of a liquefied gas carrier, the convex deck structure comprising a convex deck plate, a convex deck framework disposed above the convex deck plate, and a plurality of anti-roll supports (400) disposed between the convex deck plate and an independent liquid cargo tank. The convex deck framework comprises a transverse structure transversely spanning the convex deck plate in the width direction of a ship, and a longitudinal structure provided along the length direction of the ship and crossing the transverse structure, the transverse structure and the longitudinal structure together bearing the convex deck plate. The anti-roll supports (400) comprise a fixing portion (410) connected to a hull, a tank connection portion (420) connected to the independent liquid cargo tank, and a force transfer portion (430) used for transferring transverse force from the fixing portion (410) to the tank connection portion (420). With regard to an independent liquid cargo tank, the present convex deck structure, on the premise of satisfying an anti-roll function and top portion construction and maintenance space, increases the space for the independent liquid cargo tank in the depth direction of the hull, expands tank capacity and increases economic benefit.

Description

Convex deck structure and liquefied gas ship

technical field

The present application relates to the technical field of liquefied gas ships, in particular, to a convex deck structure of a liquefied gas ship with an anti-rolling structure on the top.

Background technique

The liquefied gas carrier is arranged with a convex deck, and the convex deck includes a convex deck body and a convex deck frame arranged under the convex deck body for reinforcing the convex deck structure, and a liquid cargo tank is arranged between the convex deck and the hull. Since the liquid cargo tank is independent of the hull structure, it is also called an independent liquid cargo tank.

During shipping, independent liquid cargo tanks will vibrate laterally due to static and dynamic loads. In order to limit the amplitude of lateral shaking of independent liquid cargo tanks, anti-rolling structures are usually arranged between independent liquid cargo tanks and convex deck frames. The anti-roll structure is usually installed on the convex deck frame and close to the convex deck. In order to arrange and overhaul the anti-rolling structure and top insulation of the liquid cargo tank, an inspection channel will be set up above the independent liquid cargo tank. The economy of airships has been reduced.

Contents of the invention

The purpose of the embodiments of the present application is to provide a convex deck structure, which ensures the strength of the convex deck structure by arranging the convex deck skeleton in the convex deck structure above the convex deck body and arranging the anti-rolling structure below the convex deck body On the premise of limiting the lateral shaking of the independent liquid cargo tank, the space of the independent liquid cargo tank in the depth direction of the hull is expanded, thereby raising the height of the independent liquid cargo tank, expanding the tank capacity, and improving economic benefits.

Another object of the embodiments of the present application is to provide a liquefied gas carrier provided with the above-mentioned convex deck structure.

In the first aspect, the present application provides a convex deck structure suitable for a liquefied gas carrier with an independent liquid cargo tank, including:

Convex deck body, including the flat deck frame, the flat deck frame includes at least two longitudinals extending along the ship's length, and at least two longitudinals are symmetrically distributed on both sides of the ship's width;

The convex deck frame is arranged above the convex deck body, including a transverse structure and a longitudinal structure; the transverse structure spans the convex deck body in the ship's width direction, and the toes on both sides of the convex deck body are aligned with the flat deck frame on the same side. Longitudinal connection; the longitudinal structure spans the convex deck body longitudinally in the ship's length direction, and is arranged crosswise with the transverse structure, and is used to jointly bear the convex deck body with the transverse structure;

A plurality of anti-roll supports are arranged on the top of the independent liquid cargo tank and arranged according to a preset plan along the ship’s length; the anti-roll supports include a fixed part, a cabin connection part and a force transmission part; the fixed part is used to connect with the convex deck plate Body connection; the cabin body connection part is used to connect with the independent liquid cargo tank; the force transmission part is arranged between the fixed part and the cabin body connection part, and is used to transmit the transverse force from the cabin body connection part to the fixed part.

In one embodiment, the convex deck frame adopts a longitudinal frame structure, and the transverse structure includes transverse beams; the longitudinal structure includes longitudinal beams and longitudinal ribs; the longitudinal ribs are arranged through the convex deck body along the length of the ship.

In one embodiment, an arrangement scheme of the plurality of anti-rolling supports along the ship's length direction is a symmetrical arrangement on the starboard and starboard sides.

In one embodiment, an arrangement scheme of the plurality of anti-rolling supports along the ship's length direction is alternately arranged front and back along the centerline of the independent liquid cargo tank.

In one embodiment, the upper end of the fixed portion is arranged near the transverse beam, and includes hull risers, hull brackets and hull stiffeners.

The thickness of the hull risers and longitudinal girders is centered for load transfer.

The upper end of the stiffener of the hull is arranged near the longitudinal rib, and the lower end is aligned with the upper and lower ends of the force transmission part.

In one embodiment, the tank connection includes cargo tank horizontal baffles, cargo tank risers, cargo tank brackets and cargo tank stiffeners.

The cargo tank horizontal baffle is vertically fixed to the cargo tank riser, and the area enclosed by the two is used for arranging the force transmission part.

In one embodiment, the bottom end of the force transmission part is arranged on the horizontal baffle of the cargo tank part; the left end surface of the force transmission part is connected with the riser of the cargo tank part through epoxy resin; the right end surface of the force transmission part There is a gap between the hull riser and the hull riser, and the lower end surface of the hull riser exceeds the lower end surface of the force transmission part by a predetermined distance.

In one embodiment, the force transmitting portion is laminated wood of predetermined thickness.

In the second aspect, the present application also provides a liquefied gas carrier, including the convex deck structure in any one of the embodiments mentioned in the first aspect.

In one embodiment, the liquefied gas carrier also includes topside tanks arranged on both sides of the top of the independent liquid cargo tank, the convex deck is transitionally connected with the topside tank, and the independent liquid cargo tank is a double-curvature surface at the transitional connection part.

The topside tank is provided with lightening holes and passage holes. The cross-section shape of the passage holes is egg-shaped, and the egg shape is larger at the upper part and smaller at the lower part.

The application has the following beneficial effects:

1. This application arranges the convex deck frame in the convex deck structure above the convex deck body, wherein the transverse beam in the convex deck frame crosses the convex deck body along the ship width direction, and connects with the longitudinal beam in the flat deck frame Fixed connection; the longitudinal beams and longitudinal ribs in the convex deck skeleton are arranged crosswise with the transverse beams to jointly carry the convex deck body. The convex deck structure not only satisfies the overall strength of the hull, but also does not occupy the space above the independent liquid cargo tank, so that the capacity of the independent liquid cargo tank in the depth direction of the hull is enlarged, and the economic benefit is improved;

2. In this application, by fixing the anti-roll support on the convex deck body, the lateral swing of the independent liquid cargo tank is limited, and the anti-roll is realized;

3. The convex deck frame structure is arranged above the convex deck body, which not only facilitates the maintenance of the convex deck frame, but also simplifies the maintenance work below the convex deck body;

4. The skeleton structure of the convex deck is arranged above the body of the convex deck, combined with the new structure and new layout of the anti-rolling support, it is more convenient for the inspection and maintenance of the insulation on the top of the independent liquid cargo tank.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings that are required in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and thus It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.

Fig. 1 is a side view of a convex deck structure shown according to an embodiment of the present application;

Fig. 2 is a layout diagram showing a plurality of anti-roll supports alternately arranged front and back along the centerline of an independent liquid cargo tank according to an embodiment of the present application;

Fig. 3 is a layout diagram showing a plurality of anti-roll bearings arranged symmetrically along the starboard and starboard sides according to the embodiment of the present application;

Fig. 4 is a schematic structural diagram of an anti-roll support according to an embodiment of the present application.

A. Anti-roll bearing on port side; B. Anti-roll bearing on starboard side; C. Center line of independent cargo tank;

100, convex deck 110, longitudinal beam 120, transverse beam 130, longitudinal reinforcement 140, flat deck frame 150, flat deck longitudinal frame 200, topside tank 210, lightening hole 220, passage hole 300, independent liquid cargo tank 310, heat insulation 400, anti-roll support 410, fixed part 411, hull vertical plate 412, hull stiffener 413, hull bracket 414, hull triangle plate 420, cabin connecting part 421, cargo tank vertical plate 422, liquid Cargo tank stiffener 423, cargo tank bracket 424, cargo tank horizontal baffle 425, cargo tank trapezoidal plate 430, force transmission part 440, epoxy resin 500, maintenance space

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

In a first aspect, the present application provides a convex deck structure. Fig. 1 is a side view of a convex deck structure according to an embodiment of the present application. Referring to FIG. 1 , the convex deck 100 includes a convex deck body, a convex deck frame and a plurality of anti-rolling supports 400 . The convex deck body includes a flat deck frame 140, and the flat deck frame 140 includes at least two flat deck longitudinals 150 symmetrically distributed on both sides of the ship's width direction and extending along the ship's length direction. The convex deck skeleton is arranged above the convex deck body, including a transverse structure and a longitudinal structure. The transverse structure spans the convex deck body in the ship's width direction, and the toes on both sides are connected to the flat deck longitudinals 150 on the same side; the longitudinal structure spans the convex deck body longitudinally in the ship's length direction, and is arranged crosswise with the transverse structure , used to jointly bear the convex deck body with the transverse structure. The convex deck skeleton adopts a longitudinal frame structure, and the transverse structure includes a transverse beam 120, which spans the convex deck body in the ship's width direction, and the toes on both sides of the transverse beam 120 are connected to the flat deck longitudinals 150 on the same side. Play the role of load transmission and reduce stress concentration, so that the force transmission of the entire hull frame is more reasonable. The longitudinal structure includes longitudinal beams 110 and longitudinal ribs 130, and the longitudinal ribs 130 are arranged through and arranged above the convex deck body along the ship's length direction. Longitudinal beams 110 and longitudinal ribs 130 intersect with transverse beams 120 , and together with transverse beams 120 bear the convex deck body. A plurality of anti-rolling supports 400 are arranged between the independent liquid cargo tank 300 and the convex deck body according to a preset scheme along the ship's length direction, so as to limit the lateral shaking of the independent liquid cargo tank 300 .

Fig. 2 is a layout diagram showing a plurality of anti-roll supports alternately arranged front and back along the centerline of an independent liquid cargo tank according to an embodiment of the present application. Referring to Fig. 2, the arrangement scheme is that anti-roll bearings on the port side and anti-roll bearings B on the starboard side are alternately arranged along the length of the ship, and the anti-roll bearings on the port side are arranged alternately. The liquid cargo tank 300 swings to the left, and the anti-roll support B on the starboard side can limit the independent liquid cargo tank 300 to the right. The number of anti-roll supports 400 in this arrangement is small, and it is suitable for liquefied gas ships with small tank capacity and small roll load.

Fig. 3 is a layout view showing a plurality of anti-roll bearings arranged symmetrically along the left and right sides according to an embodiment of the present application. Referring to Fig. 3, the arrangement scheme is that anti-roll bearings on port side and anti-roll bearing B on starboard side are arranged symmetrically along the port and starboard sides in sequence along the length direction of the ship, anti-roll bearing A on port side, The amplitude of the independent liquid cargo tank 300 can be limited to the left, and the starboard side anti-roll support B can limit the amplitude of the independent liquid cargo tank 300 to the right. This arrangement has a large number of 400 anti-roll supports, and is suitable for liquefied gas ships with large tank capacity and large roll load.

Fig. 4 is a schematic structural diagram of an anti-roll support according to an embodiment of the present application. Referring to FIG. 4 , the anti-roll support 400 includes a fixing part 410 , a cabin connection part 420 and a force transmission part 430 . The fixed part 410 is connected to the convex deck body, the cabin connection part 420 is connected to the independent liquid cargo tank 300, and the force transmission part 430 is arranged between the fixed part 410 and the cabin connection part 420, and is used to transmit the transverse force from the cabin connection part 420 Transfer to the fixed part 410.

In one embodiment, the fixed part 410 includes a hull riser 411 , a hull bracket 413 and a hull stiffener 412 . The upper end of the fixed part 410 is arranged near the transverse beam 120, and the vertical plate 411 of the hull part is arranged in alignment with the plate thickness of the longitudinal beam 110, which is used for effective load transmission and makes the whole process of load transmission more uniform. The joint of hull riser 411 and convex deck 100 is provided with hull triangle 414, which is used to reinforce the fixed portion 410, reduce stress concentration at the connection end of hull riser 411 and convex deck 100, and improve fatigue life. The upper end of the hull stiffener 412 is arranged near the longitudinal rib 130, so that there is sufficient structural support at the stress point connected to the convex deck body; Lateral force, the force of the whole structure is more reasonable.

In one embodiment, the tank connection 420 includes a cargo tank horizontal baffle 424 , a cargo tank riser 421 , a cargo tank bracket 423 and a cargo tank stiffener 422 . The cargo tank horizontal baffle 424 is vertically fixedly connected to the cargo tank vertical plate 421 , and the area enclosed by the two is used for arranging the force transmission part 430 . A cargo tank trapezoidal plate 425 is arranged between the lower end surface of the horizontal baffle plate 424 of the cargo tank, the right end surface of the vertical plate 421 of the cargo tank and the independent cargo tank 300, which is used to strengthen the connection between the three, reduce stress concentration, and prolong the service life. life.

In one embodiment, the bottom end of the force transfer portion 430 is arranged on the cargo tank portion horizontal flap 424 . The left end surface of the force transmission part 430 is in contact with the cargo tank riser 421 through epoxy resin 440. In order to make up for the construction accuracy error and ensure the material performance of the epoxy resin 440, the thickness of the epoxy resin 440 is controlled within 10mm-35mm. between. There is a certain gap between the right end surface of the force transmission part 430 and the hull riser 411 , and the reserved gap can provide a buffer space when the independent liquid cargo tank 300 undergoes lateral deformation due to cold. The lower end surface of the hull riser 411 exceeds the lower end surface of the force transmission portion 430 by a predetermined distance, which can ensure that the hull riser 411 always covers the right end surface of the force transmission portion 430 when the independent liquid cargo tank 300 expands with heat and contracts with cold , to ensure that all the lateral force from the force transmission part 430 acts on the hull riser 411 .

In the above implementation process, the convex deck frame in the structure of the convex deck 100 is arranged above the body of the convex deck, and multiple anti-rolling supports 400 are arranged on the convex deck according to different preset schemes according to the tank capacity and lateral load. Between the plate body and the independent liquid cargo tank 300. On the premise of ensuring the functions of the convex deck frame and the anti-roll support 400, the convex deck structure expands the space of the independent liquid cargo tank 300 in the depth direction of the hull, correspondingly increases the tank capacity, and improves economic benefits. At the same time, the skeleton structure of the convex deck is arranged above the body of the convex deck, which also simplifies the maintenance work in the maintenance space 500 .

In one embodiment, the force transfer portion 430 is laminated wood of a predetermined thickness. The laminated wood is used to bear the lateral load and transfer the load to the fixing part 410 , so as to achieve the function of limiting and protecting the structure of the independent liquid cargo tank 300 . The laminated wood is made of materials with low thermal conductivity, and the length needs to be adjusted according to the temperature of different types of cryogenic liquid cargo loaded. At the same time, the structure of the fixed part 410 does not need to use low-temperature special steel, which can meet the requirements of material safety under the condition of low production cost. sexual demands.

In the second aspect, the present application also provides a liquefied gas carrier, including the convex deck structure described in any one of the embodiments mentioned in the first aspect.

In one embodiment, there are topside tanks 200 arranged on both sides of the top slope of the independent cargo tank 300, the convex deck 100 is transitionally connected with the topside tank 200, and the independent cargo tank 300 is a double curvature surface at the transition connection part. Compared with the conventional planar design, the double-curvature surface is more suitable for the structure of the topside tank 200 and the convex deck 100. While meeting the convenience of passage, the height of the two sides of the independent cargo tank 300 is raised to the maximum, and the space is enlarged. cabin capacity.

In one embodiment, the topside tank 200 is provided with a lightening hole 210 and a passage hole 220. The cross-sectional structure of the passage hole 220 is egg-shaped, and the egg shape is that the upper part is larger and the lower part is smaller. The opening area of the high stress region at the bottom of the via hole 220 is small, reducing the stress level.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims

A convex deck structure suitable for a liquefied gas carrier with independent liquid cargo tanks, characterized in that it includes:

The convex deck body includes a flat deck skeleton, the flat deck skeleton includes at least two longitudinals extending along the ship's length direction, and the at least two longitudinals are symmetrically distributed on both sides of the ship's width direction;

The convex deck frame is arranged above the convex deck body, including a transverse structure and a longitudinal structure; the transverse structure straddles the convex deck body in the ship's width direction, and the toes on both sides The longitudinal structure of the flat deck frame on the side is connected; the longitudinal structure spans the convex deck body in the length direction of the ship, and is arranged crosswise with the transverse structure, so as to jointly carry the convex deck with the transverse structure Board;

A plurality of anti-rolling supports are arranged on the top of the independent liquid cargo tank and arranged according to a preset plan along the ship's length direction; the anti-rolling supports include a fixing part, a cabin connection part and a force transmission part; the fixing part It is used to connect with the convex deck body; the cabin connection part is used to connect with the independent liquid cargo tank; the force transmission part is arranged between the fixing part and the cabin connection part for The transverse force from the cabin connecting portion is transmitted to the fixing portion.
The convex deck structure according to claim 1, wherein the convex deck skeleton adopts a longitudinal skeleton structure, the transverse structure includes transverse beams; the longitudinal structure includes longitudinal beams and longitudinal ribs; the longitudinal ribs are along the The length direction of the ship is arranged through the top of the convex deck body.
The convex deck structure according to claim 1, characterized in that one arrangement of the plurality of anti-rolling supports along the ship's length direction is a symmetrical arrangement on the starboard and starboard sides.
The convex deck structure according to claim 1, characterized in that, an arrangement scheme of the plurality of anti-rolling supports along the ship's length direction is alternately arranged forward and backward along the centerline of the independent liquid cargo tank.
According to any one of claims 1 to 4, the convex deck structure is characterized in that, the upper end of the fixed part is arranged near the transverse beam, including a hull vertical plate, a hull bracket and a hull stiffener ;

The hull risers are arranged in alignment with the plate thickness of the longitudinal girders for load transfer;

The upper end of the hull stiffener is arranged near the longitudinal rib, and the lower end is aligned with the upper and lower ends of the force transmission part.
The convex deck structure according to claim 5, characterized in that, the tank connecting portion comprises a cargo tank horizontal baffle, a cargo tank riser, a cargo tank bracket and a cargo tank stiffener;

The cargo tank horizontal baffle is vertically fixed to the cargo tank riser, and the area enclosed by the two is used for arranging the force transmission part.
The convex deck structure according to claim 6, wherein the bottom end of the force transmission part is arranged on the horizontal baffle of the cargo tank part; the left end surface of the force transmission part is perpendicular to the cargo tank part The plates are contacted and connected by epoxy resin; there is a gap between the right end surface of the force transmission part and the hull riser, and the lower end surface of the hull riser is predetermined beyond the lower end surface of the force transmission part. distance.
The convex deck structure according to claim 1, wherein the force transmission part is laminated wood with a predetermined thickness.
A liquefied gas carrier, characterized by comprising the convex deck structure according to any one of claims 1-8.
A liquefied gas carrier according to claim 9, comprising topside tanks arranged on both sides of the top of the independent liquid cargo tank, the convex deck is transitionally connected with the topside tank, characterized in that the independent liquid cargo tank The cargo tank is a double-curvature surface at the said transition connection;

The topside tank is provided with a lightening hole and a passage hole, and the cross-sectional shape of the passage hole is egg-shaped, and the egg-shape is larger in the upper part and smaller in the lower part.