阅读说明：本技术 液货舱及船体 (Cargo tank and hull ) 是由 刘文华 温保华 徐旭敏 张艳 徐一军 王亚磊 唐娟娟 于 2020-12-03 设计创作，主要内容包括：本发明提供了一种液货舱及船体,涉及船舶的技术领域,所述液货舱包括：舱体、保温层和次屏蔽结构,所述保温层包裹在所述舱体的外侧,且二者之间具有间隙；所述次屏蔽结构位于所述间隙内,且位于所述舱体的下方；所述次屏蔽结构上具有与间隙连通的进液口,所述进液口用于使所述间隙内的液体能够流入到所述次屏蔽结构内。本方案中次屏蔽结构位于舱体和保温层之间的间隙内,液货舱采用封闭式次屏蔽结构,从所述舱体内泄漏的低温液体将会顺着舱体和保温层之间的间隙流入到次屏蔽结构内,从而避免液货舱泄露的低温液体飞溅到船体,消除了船体结构受到低温损伤的隐患,提高船体安全性。(The invention provides a cargo tank and a ship body, and relates to the technical field of ships, wherein the cargo tank comprises: the heat insulation layer wraps the outer side of the cabin body, and a gap is formed between the cabin body and the heat insulation layer; the secondary shielding structure is positioned in the gap and below the cabin body; the secondary shielding structure is provided with a liquid inlet communicated with the gap, and the liquid inlet is used for enabling liquid in the gap to flow into the secondary shielding structure. In this scheme secondary shielding structure is located the clearance between the cabin body and the heat preservation, and the cargo tank adopts closed secondary shielding structure, follows the low-temperature liquid that the internal leakage of cabin will flow into in the secondary shielding structure along the clearance between the cabin body and the heat preservation to avoid the low-temperature liquid that the cargo tank was revealed to splash the hull, eliminated the hull structure and received the hidden danger of low temperature damage, improved hull security.)

1. A cargo tank, said tank comprising: the heat insulation structure comprises a cabin body (100), a heat insulation layer (200) and a secondary shielding structure (300), wherein the heat insulation layer (200) wraps the outer side of the cabin body (100), and a gap is formed between the heat insulation layer and the cabin body;

the secondary shielding structure (300) is positioned in the gap and below the cabin (100);

the secondary shielding structure (300) is provided with a liquid inlet (350) communicated with the gap, and the liquid inlet (350) is used for enabling liquid in the gap to flow into the secondary shielding structure (300).

2. A cargo tank according to claim 1, wherein the secondary shielding structure (300) comprises a secondary shielding bottom plate (310), a secondary shielding rear end wall (320), a secondary shielding front end wall (330) and a secondary shielding top plate (340), the secondary shielding rear end wall (320) and the secondary shielding front end wall (330) are respectively connected to two opposite ends of the same side of the secondary shielding bottom plate (310), and the secondary shielding top plate (340) is connected to one end of the secondary shielding rear end wall (320) far away from the secondary shielding bottom plate (310);

the secondary shielding top plate (340) is connected with the side wall of the cabin body (100), and the secondary shielding front end wall (330) is connected with the bottom wall (120) of the cabin body (100), so that the secondary shielding bottom plate (310), the secondary shielding rear end wall (320), the secondary shielding front end wall (330), the secondary shielding top plate (340), the side wall of the cabin body (100) and the bottom wall (120) of the cabin body (100) enclose a liquid leakage cavity;

liquid inlets (350) are formed in the secondary shielding top plate (340) and the secondary shielding front end wall (330).

3. The cargo tank according to claim 2, wherein reinforcing ribs (400) are arranged on the outer side of the secondary shielding structure (300), the reinforcing ribs (400) comprise a reinforcing bottom part, a reinforcing rear end part, a reinforcing front end part and a reinforcing top part which are sequentially connected, the reinforcing bottom part, the reinforcing rear end part, the reinforcing front end part and the reinforcing top part are correspondingly connected with the secondary shielding bottom plate (310), the secondary shielding rear end wall (320), the secondary shielding front end wall (330) and the secondary shielding top plate (340) respectively, and the reinforcing front end part and the reinforcing top part are connected with the bottom wall (120) and the side wall of the tank body (100) respectively.

4. A cargo tank according to claim 3, wherein the number of the reinforcing ribs (400) is plural, and plural reinforcing ribs (400) are arranged in order in the longitudinal direction of the secondary shielding structure (300).

5. Cargo tank according to claim 1, characterized in that the inner walls of the insulation (200) are provided with splash screens (500) for preventing leakage from directly contacting the insulation (200).

6. Cargo tank according to claim 1, characterized in that the outer side of the insulation (200) is covered with a protective layer (600).

7. Cargo tank according to claim 1, characterized in that the secondary shielding structure (300) is provided with gas permeable tubes (700) communicating the inside and outside thereof.

8. Cargo tank according to claim 1, characterized in that the inner side of the insulation (200) is provided with an outwardly concave escape groove for accommodating a secondary shielding structure (300).

9. Cargo tank according to claim 1, characterized in that the secondary shielding structure (300) is welded to the tank (100) as a one-piece structure.

10. A ship hull (810), characterized in that the ship hull (810) comprises a cargo tank according to any one of claims 1-9.

Technical Field

The invention relates to the technical field of ships, in particular to a cargo tank and a ship body.

Background

The existing MOSS type Liquefied Natural Gas (LNG) transport ship and IHI-SPB type LNG transport ship are B type cabins of independent liquid cargo cabins, and local secondary screen walls are required to be arranged according to the standard requirements. The secondary screen wall is of an open structure, namely, the leaked liquid generated by the main screen is guided to one or more receiving discs with open upper parts through the leakage channel, namely, the local secondary screen wall, so that the leaked liquid is evaporated in the receiving discs. Because the liquid is LNG, the low temperature can reach 163 ℃ below zero, and when the liquid is evaporated naturally, the space enclosed by the liquid cargo tank heat-insulating layer and the ship body is possibly influenced by low-temperature diffusion, and the ship body structure needs to be made of low-temperature materials or provided with the heat-insulating layer, so that low-temperature damage is avoided.

The secondary shielding structure of the existing B-type cabin basically adopts an open structure and is placed on a bottom plate in a ship body. When the ship body moves with wind and waves on the sea, low-temperature liquid leaked from the main screen wall is gathered to the receiving plate, so that sloshing is caused to splash everywhere, and the risk of low-temperature damage is brought to the ship body. Under the condition of large leakage amount, even the possibility of overflowing the bearing disc exists, which brings hidden troubles to the safe operation of the ship body.

Disclosure of Invention

The invention aims to provide a liquid cargo tank and a ship body so as to relieve the technical problem that low-temperature liquid leaked from a main screen wall splashes to the ship body.

In a first aspect, an embodiment of the present invention provides a cargo tank, where the cargo tank includes: the heat insulation layer wraps the outer side of the cabin body, and a gap is formed between the cabin body and the heat insulation layer;

the secondary shielding structure is positioned in the gap and below the cabin body;

the secondary shielding structure is provided with a liquid inlet communicated with the gap, and the liquid inlet is used for enabling liquid in the gap to flow into the secondary shielding structure.

Furthermore, the secondary shielding structure comprises a secondary shielding bottom plate, a secondary shielding rear end wall, a secondary shielding front end wall and a secondary shielding top plate, the secondary shielding rear end wall and the secondary shielding front end wall are respectively connected to two opposite ends of the same side of the secondary shielding bottom plate, and the secondary shielding top plate is connected to one end, far away from the secondary shielding bottom plate, of the secondary shielding rear end wall;

the secondary shielding top plate is connected with the side wall of the cabin body, and the secondary shielding front end wall is connected with the bottom wall of the cabin body, so that a liquid leakage cavity is defined by the secondary shielding bottom plate, the secondary shielding rear end wall, the secondary shielding front end wall, the secondary shielding top plate, the side wall of the cabin body and the bottom wall of the cabin body;

liquid inlets are formed in the secondary shielding top plate and the secondary shielding front end wall.

Further, the outside of inferior shielding structure is provided with the strengthening rib, the strengthening rib is including the enhancement bottom that connects gradually, strengthen the rear end portion, strengthen preceding tip and strengthen the top, just strengthen the bottom, strengthen the rear end portion, strengthen preceding tip and strengthen the top respectively with inferior shielding bottom plate, inferior shielding rear end wall, inferior shielding front end wall and inferior shielding roof correspond to be connected, just before strengthening tip and strengthening the top respectively with the diapire and the lateral wall of the cabin body be connected.

Furthermore, the number of the reinforcing ribs is multiple, and the plurality of reinforcing ribs are sequentially arranged in the length direction of the secondary shielding structure.

Furthermore, an anti-splash screen is arranged on the inner wall of the heat-insulating layer and used for preventing liquid leakage from directly contacting with the heat-insulating layer.

Furthermore, the outer side of the heat-insulating layer is wrapped with a protective layer.

Furthermore, the secondary shielding structure is provided with a vent pipe communicated with the inside and the outside of the secondary shielding structure.

Furthermore, the inner side of the heat preservation layer is provided with an outward sunken avoidance groove, and the avoidance groove is used for accommodating the secondary shielding structure.

Furthermore, the secondary shielding structure and the cabin body are welded into an integral structure.

In a second aspect, embodiments of the present invention provide a ship hull comprising a cargo tank as described above.

The cargo tank provided by the embodiment of the invention comprises: the heat insulation layer wraps the outer side of the cabin body, and a gap is formed between the cabin body and the heat insulation layer; the secondary shielding structure is positioned in the gap and below the cabin body; the secondary shielding structure is provided with a liquid inlet communicated with the gap, and the liquid inlet is used for enabling liquid in the gap to flow into the secondary shielding structure. The secondary shielding structure in this scheme is located the clearance between the cabin body and the heat preservation, and the cargo tank adopts closed secondary shielding structure, follows the low-temperature liquid that the internal leakage of cabin will flow into the secondary shielding structure along the clearance between the cabin body and the heat preservation in to the low-temperature liquid who avoids the cargo tank to reveal splashes the hull, has eliminated the hidden danger that the hull structure received low temperature damage, improves the hull security.

The ship body provided by the embodiment of the invention comprises the liquid cargo tank. Because the ship hull provided by the embodiment of the invention adopts the liquid cargo tank, the ship hull provided by the embodiment of the invention also has the advantages of the liquid cargo tank.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic cross-sectional view of a cargo tank provided in accordance with an embodiment of the invention;

FIG. 2 is a schematic longitudinal cross-sectional view of a cargo tank provided in accordance with an embodiment of the present invention;

FIG. 3 is a partial cross-sectional view taken along line A-A of FIG. 1;

FIG. 4 is a schematic view of a gap between a rear end wall of a secondary shield and an insulating layer according to an embodiment of the present invention;

fig. 5 is a schematic view of a gap between the secondary shielding bottom plate and the insulating layer according to an embodiment of the present invention.

Icon: 100-a cabin body; 110-rear side wall; 120-a bottom wall; 200-a heat-insulating layer; 300-secondary shielding structure; 310-secondary shield backplane; 320-secondary shield rear end wall; 330-secondary shield front end wall; 340-secondary shield ceiling; 350-liquid inlet; 400-reinforcing ribs; 500-splash screen; 600-a protective layer; 700-ventilating pipe; 810-hull; 820-spacer block.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, their indicated orientations or positional relationships are based on those shown in the drawings only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 5, the cargo tank provided by the embodiment of the invention comprises a tank body 100, an insulating layer 200 and a secondary shielding structure 300, wherein the insulating layer 200 is wrapped outside the tank body 100 with a gap therebetween; the secondary shielding structure 300 is located in the gap and below the cabin 100; the secondary shielding structure 300 is provided with a liquid inlet 350 communicated with the gap, and the liquid inlet 350 is used for enabling the liquid in the gap to flow into the secondary shielding structure 300. In the scheme, the secondary shielding structure 300 is positioned in the gap between the cabin body 100 and the heat preservation layer 200, the liquid cargo tank adopts the closed secondary shielding structure 300, and low-temperature liquid leaked from the cabin body 100 flows into the secondary shielding structure 300 along the gap between the cabin body 100 and the heat preservation layer 200, so that the low-temperature liquid leaked from the liquid cargo tank is prevented from splashing to the ship body 810, the hidden danger that the ship body 810 structure is damaged by low temperature is eliminated, and the safety of the ship body 810 is improved.

In this embodiment, the secondary shielding structure 300 is located inside the insulating layer 200, and the cargo tank can be directly installed in the hull 810 after being formed, so that the insulating layer 200 does not need to be arranged on the hull 810, thereby reducing the production and construction costs of a shipyard.

The secondary shielding structure 300 comprises a secondary shielding bottom plate 310, a secondary shielding rear end wall 320, a secondary shielding front end wall 330 and a secondary shielding top plate 340, wherein the secondary shielding rear end wall 320 and the secondary shielding front end wall 330 are respectively connected to two opposite ends of the same side of the secondary shielding bottom plate 310, and the secondary shielding top plate 340 is connected to one end, far away from the secondary shielding bottom plate 310, of the secondary shielding rear end wall 320; the secondary shielding top plate 340 is connected with the side wall of the cabin 100, and the secondary shielding front end wall 330 is connected with the bottom wall 120 of the cabin 100, so that the secondary shielding bottom plate 310, the secondary shielding rear end wall 320, the secondary shielding front end wall 330, the secondary shielding top plate 340, the side wall of the cabin 100 and the bottom wall 120 of the cabin 100 enclose a liquid leakage cavity; an inlet port 350 is provided in each of the secondary shield top plate 340 and the secondary shield front end wall 330.

The secondary shielding structure 300 may be C-shaped and disposed at a corner between the rear sidewall 110 and the bottom wall 120 of the nacelle 100, and the secondary shielding structure 300 may extend in a width direction of the nacelle 100. The secondary shielding structure 300 may also be disposed at the corners between the other side walls of the nacelle 100 and the bottom wall 120. The secondary shielding rear end wall 320 and the secondary shielding front end wall 330 are respectively vertically connected to the two opposite ends of the same side of the secondary shielding bottom plate 310, the secondary shielding top plate 340 is vertically connected to one end of the secondary shielding rear end wall 320 far away from the secondary shielding bottom plate 310, and is parallel to the secondary shielding bottom plate 310, and the secondary shielding bottom plate 310 is lower than the bottom wall 120 of the cabin 100. The secondary shield top plate 340 may be welded to the rear side wall 110 of the nacelle 100 and the secondary shield front end wall 330 welded to the bottom wall 120 of the nacelle 100. The secondary shielding top plate 340 and the secondary shielding front end wall 330 are both provided with liquid inlets 350, liquid left from the gap between the rear side wall 110 of the cabin 100 and the insulating layer 200 from top to bottom can flow into the secondary shielding structure 300 from the liquid inlets 350 on the secondary shielding top plate 340, and liquid which has flowed into the gap between the bottom wall 120 of the cabin 100 and the insulating layer 200 can flow into the secondary shielding structure 300 from the liquid inlets 350 on the secondary shielding front end wall 330.

The height of the secondary shield top plate 340 and the secondary shield front end wall 330 is between 0.1-1 meter. The length of the secondary shield backplane 310 is between 1-3 meters.

The outside of inferior shielding structure 300 is provided with strengthening rib 400, strengthening rib 400 including the enhancement bottom that connects gradually, strengthen the rear end portion, strengthen preceding tip and strengthen the top, just strengthen the bottom, strengthen the rear end portion, strengthen preceding tip and strengthen the top respectively with inferior shielding bottom plate 310, inferior shielding rear end wall 320, inferior shielding front end wall 330 and inferior shielding roof 340 correspond and are connected, just tip and enhancement top are connected with diapire 120 and the lateral wall of cabin body 100 respectively before strengthening.

The strengthening rib 400 welds with secondary shielding structure 300 and cabin body 100 respectively, can play the reinforced effect of support, because secondary shielding structure 300 is located the bottom of cabin body 100, and the structure of strengthening rib 400 is unanimous with the shape of secondary shielding structure 300's cross section, strengthen the bottom, strengthen the rear end portion, strengthen preceding tip and strengthen the top respectively with secondary shielding bottom plate 310, secondary shielding rear end wall 320, secondary shielding front end wall 330 and secondary shielding roof 340 correspond the welding, and strengthening rib 400 can make secondary shielding structure 300's structural stability improve, avoids secondary shielding structure 300 to take place to warp. The height of the strengthening ribs is between 0.05 and 0.1 meter.

The number of the reinforcing ribs 400 is plural, and the plurality of reinforcing ribs 400 are sequentially arranged in the length direction of the secondary shielding structure 300. The plurality of ribs 400 may support the secondary shielding structure 300 at a plurality of positions together, thereby serving as a stable support.

And the inner wall of the heat-insulating layer 200 is provided with a splash screen 500 for preventing leakage from directly contacting with the heat-insulating layer 200.

Splash shield 500 can be located the circumference lateral wall and the bottom surface of heat preservation 200 for avoid low temperature liquid direct and heat preservation 200 contact, and splash shield 500's coefficient of friction can be less than heat preservation 200's coefficient of friction, and liquid can smoothly flow along splash shield 500.

The splash screen 500 material may be a stainless steel material.

The outer side of the insulating layer 200 is wrapped with a protective layer 600. Protective layer 600 may function to protect insulation layer 200, on the one hand, and insulation layer 200 may further block liquid from flowing into hull 810 through insulation layer 200, on the other hand.

The material of the protection layer 600 may be galvanized iron.

The secondary shielding structure 300 is provided with a vent pipe 700 communicating the inside and the outside thereof. The ventilation pipes 700 may be disposed on the secondary shielding bottom plate 310, and the ventilation pipes 700 may be connected to the ventilation mast of the main hull 810 to prevent the liquid in the secondary shielding structure from evaporating to generate overpressure.

The inside of heat preservation 200 is provided with the groove of dodging of outside sunken, dodge the groove and be used for holding secondary shielding structure 300.

The avoidance groove is formed in the heat insulation layer 200 and used for accommodating the secondary shielding structure 300, so that the whole external structure of the liquid cargo tank is more uniform, and meanwhile, the secondary shielding structure 300 can be located at a position with a lower height and is helpful for liquid to flow into the secondary shielding structure 300.

The hull 810 provided by the embodiment of the invention comprises the cargo tank. Because the hull 810 provided by embodiments of the present invention incorporates the cargo tank described above, the hull 810 provided by embodiments of the present invention also has the advantages of a cargo tank.

The cargo tank is arranged in the ship body 810, a cushion block 820 is arranged between the cargo tank and the ship body 810, and the cushion block 820 is used for supporting the cargo tank so that a certain gap is reserved between the cargo tank and the bottom of the ship body 810.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.