Compartment Type B and Vessel

Abstract

The present invention provides a Type B tank and a ship, relating to the technical field of oil and gas storage and transportation. The Type B tank includes a housing and an enclosure system. The housing is formed by welding multiple partition plates, and an accommodation cavity for containing LNG liquid is formed inside the housing, and a weld seam is provided between any two adjacent partition plates. The enclosure system includes a diversion channel formed by bonding multiple heat insulation bricks to each other. The extending direction of the diversion channel is the same as the extending direction of the weld seam. The diversion channel is connected to the housing to enclose a leakage channel, and all the weld seams are located inside the leakage channel. At the same time, the leakage channel is communicated with the outside. The enclosure system further includes a first heat insulation layer, and the first heat insulation layer is connected to the housing. By providing the leakage channel, when the weld seam is damaged, the LNG liquid enters the leakage channel. At the same time, since the leakage channel is also communicated with the outside, the LNG liquid in the leakage channel will volatilize into the outside air and will not erode the hull.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas storage and transportation, and more particularly to a Type B tank and a ship. Background Art

[0002] The cargo holds of ships specifically designed for transporting liquid cargoes such as liquefied natural gas and liquefied petroleum gas are usually referred to as liquid tanks. The most common shapes of the liquid tanks of liquefied gas carriers are spherical tanks, rectangular tanks, diamond-shaped tanks, etc. According to the design concept, the liquid tanks can also be divided into Type A, Type B, and Type C.

[0003] According to the design concept of Type B independent liquid tanks, the design of such liquid tanks needs to consider the situation of liquid tank leakage. The liquid tank needs to have a leakage management function, that is, in the case of liquid tank leakage, it can still maintain normal operation within a certain period of time (15 days).

[0004] In the prior art, a drip tray is usually provided below the Type B tank to receive the dripping cryogenic LNG liquid. When the LNG liquid exceeds the design capacity of the drip tray, the LNG liquid will move out and erode the hull. Summary of the Invention

[0005] (1) The problem to be solved by the present invention is that the existing LNG liquid is easy to erode the hull after overflowing.

[0006] (2) Technical Solution

[0007] To solve the above technical problems, an embodiment of the present invention provides a Type B tank for a ship, including: an outer shell and an enclosure system;

[0008] The outer shell is formed by welding a plurality of partition plates, and an accommodation cavity is formed inside the outer shell. A weld seam is provided between any two adjacent partition plates;

[0009] The enclosure system includes a diversion groove formed by bonding a plurality of heat-insulating bricks to each other. The extending direction of the diversion groove is the same as the extending direction of the weld seam. The diversion groove and the outer shell are connected to enclose a leakage channel, and all the weld seams are located inside the leakage channel. The leakage channel is communicated with the outside, and a control member for controlling the switch at the communication part is provided at the communication part;

[0010] The enclosure system further includes a first heat-insulating layer, and the first heat-insulating layer is connected to the outer shell.

[0011] According to an embodiment of the present invention, further, the enclosure system further includes a first protective layer;

[0012] The first heat-insulating layer is flush with the diversion groove;

[0013] The first protective layer is connected to the first heat-insulating layer and the outer wall of the leakage channel.

[0014] According to an embodiment of the present invention, further, the enclosure system further includes a first polyurea layer;

[0015] The first polyurea layer is connected to the first protective layer.

[0016] According to an embodiment of the present invention, further, the enclosure system further includes a plurality of first fixing rods, the B-type cabin includes a plurality of skeletons, and the first fixing rods and the skeletons are arranged in one-to-one correspondence;

[0017] The skeleton is arranged in the accommodation cavity and is connected to the surface of the outer shell close to the accommodation cavity. One end of the first fixing rod is connected to the surface of the outer shell away from the accommodation cavity, and the other end is connected to the first protective layer;

[0018] The connection point of the first fixing rod and the outer shell coincides with the connection point of the skeleton and the outer shell.

[0019] According to an embodiment of the present invention, further, the enclosure system further includes a second heat insulation layer;

[0020] The second heat insulation layer is connected to the first polyurea layer.

[0021] According to an embodiment of the present invention, further, the enclosure system further includes a second protective layer;

[0022] The second protective layer is connected to the second heat insulation layer.

[0023] According to an embodiment of the present invention, further, the enclosure system further includes a second polyurea layer;

[0024] The second polyurea layer is connected to the second protective layer.

[0025] According to an embodiment of the present invention, further, the enclosure system further includes a plurality of second fixing rods;

[0026] One end of the second fixing rod is connected to the first protective layer, and the other end is connected to the second protective layer;

[0027] Any one of the second fixing rods is arranged in a staggered manner with the first fixing rod.

[0028] According to an embodiment of the present invention, further, the enclosure system further includes a gas pipeline;

[0029] One end of the gas pipeline is connected to a gas source, and the other end is communicated with the leakage channel;

[0030] The ship further includes a ventilation mast, the ventilation mast is communicated with the outside, and the leakage channel is communicated with the ventilation mast.

[0031] According to an embodiment of the present invention, further, the heat-insulating bricks are foam glass bricks.

[0032] According to an embodiment of the present invention, further, both the first heat-insulating layer and the second heat-insulating layer are polyurethane layers.

[0033] According to an embodiment of the present invention, further, both the first protective layer and the second protective layer are wire meshes.

[0034] Another embodiment of the present invention also provides a ship, including the B-type cabin described in any of the above embodiments.

[0035] Advantages of the present invention:

[0036] The B-type cabin provided by the present invention includes: an outer shell and an enclosure system. The outer shell is formed by welding a plurality of partition plates, and a receiving cavity for containing LNG liquid is formed inside the outer shell, and a weld seam is provided between any two adjacent partition plates. The enclosure system includes a diversion groove formed by bonding a plurality of heat-insulating bricks to each other, the extending direction of the diversion groove is the same as the extending direction of the weld seam, the diversion groove is connected to the outer shell to enclose a leakage channel, and all the weld seams are located inside the leakage channel, and at the same time the leakage channel is communicated with the outside. The enclosure system further includes a first heat-insulating layer, and the first heat-insulating layer is connected to the outer shell.

[0037] By providing the leakage channel, when the weld seam is damaged, the LNG liquid enters the leakage channel. At the same time, since the leakage channel is also communicated with the outside, the LNG liquid in the leakage channel will volatilize into the outside air and will not erode the hull. Description of the Drawings

[0038] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0039] Figure 1 Schematic structural diagram of the enclosure system provided by the embodiment of the present invention;

[0040] Figure 2 For Figure 1 Partial enlarged view of point A of

[0041] Figure 3 For Figure 1 Partial enlarged view of point B of

[0042] Figure 4 Another perspective structural schematic diagram of the enclosure system provided by the embodiment of the present invention;

[0043] Figure 5 Schematic diagram of the cooperation between the first fixing rod and the second fixing rod provided by the embodiment of the present invention;

[0044] Figure 6 Plan view of the leakage channel provided by the embodiment of the present invention;

[0045] Figure 7 Schematic diagram of the flow guiding groove structure provided by the embodiment of the present invention.

[0046] Icons: 110 - housing; 111 - partition; 1111 - weld seam; 120 - skeleton;

[0047] 210 - flow guiding groove; 211 - heat insulating brick; 220 - leakage channel; 230 - first heat insulating layer; 240 - first protective layer; 250 - first polyurea layer; 260 - second heat insulating layer; 270 - second protective layer; 280 - second polyurea layer; 291 - first fixing rod; 292 - second fixing rod; 310 - gas pipeline; 320 - bracket. Detailed implementation manners

[0048] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0049] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0050] It should be noted that in the description of the present invention, the terms "connection" and "installation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or connected through an intermediate medium; it can be a mechanical connection, or an electrical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0051] An embodiment of the present invention provides a Type B tank, which is a main equipment of an LNG ship and is used to store LNG liquid. As Figures 1 to 7 shown, the Type B tank includes: a housing 110 and an insulation system.

[0052] The housing 110 is formed by welding a plurality of partition plates 111. An accommodation cavity for containing LNG liquid is formed inside the housing 110. A weld 1111 is provided between any two adjacent partition plates 111. The insulation system includes a flow guide groove 210 formed by bonding a plurality of heat insulation bricks 211 to each other. The extending direction of the flow guide groove 210 is the same as that of the weld 1111. The flow guide groove 210 and the housing 110 are connected to enclose a leakage channel 220, and all the welds 1111 are located inside the leakage channel 220. At the same time, the leakage channel 220 communicates with the outside, and a control member for controlling the switch at the communication part is provided at the communication part. Usually, the control member closes the communication part, and when leakage occurs at the weld, the control member opens the communication part so that LNG can volatilize to the outside. The insulation system further includes a first insulation layer 230, and the first insulation layer 230 is connected to the housing 110.

[0053] Preferably, the control member is a solenoid valve.

[0054] In this embodiment, usually, the housing 110 of the Type B tank is spliced by a plurality of partition plates 111 and then connected in a welding form to finally form the Type B tank. Therefore, there are multiple welds 1111 on the surface of the Type B tank. The flow guide groove 210 is arranged along the extending direction of the weld 1111, that is, the flow guide groove 210 is provided outside each weld 1111 and is used to connect with the housing 110 to form a leakage channel 220.

[0055] Specifically, when the weld 1111 is straight, the flow guide groove 210 also extends straight. When the positions of three or more partition plates 111 are considered, it can be understood that the weld 1111 extends from a point in multiple directions. Therefore, the flow guide groove 210 also extends in multiple directions like the weld 1111. Therefore, the flow guide grooves 210 corresponding to each weld 1111 are all interconnected.

[0056] In this embodiment, the diversion channel 210 is formed by bonding multiple heat-insulating bricks 211 to each other. Specifically, there are various manufacturing methods for the diversion channel 210. First, the diversion channel 210 is prefabricated in a prefabrication factory and then transported to the welding site of the B-type cabin for installation. At this time, first, according to the width and length of the weld 1111, the bottom wall of the diversion channel 210 is laid, and in an adhesive bonding manner, where the adhesive used is a cryogenic-resistant adhesive to avoid failure under the influence of the low temperature of LNG liquid. The bottom wall of the diversion channel 210 can be laid in one layer or multiple layers. After the bottom wall is laid, it is stacked upward at both ends of the bottom wall to form two side walls of the diversion channel 210. The side walls, like the bottom wall, can also have multiple layers. Finally, the prefabricated diversion channel 210 is adhesively connected to the outer shell 110 through a cryogenic-resistant adhesive to form the leakage channel 220.

[0057] Of course, the diversion channel 210 can also be directly fabricated on the outer shell 110. Specifically, first, multiple layers of heat-insulating bricks 211 are adhesively bonded on both sides of the weld 1111 using a cryogenic-resistant adhesive, and then the bottom wall is adhesively bonded on the two side walls using a cryogenic-resistant adhesive. Finally, the leakage channel 220 is formed.

[0058] In this embodiment, by providing the leakage channel 220, when the weld 1111 is damaged, the LNG liquid enters the leakage channel 220. At the same time, since the leakage channel 220 is also connected to the outside, the LNG liquid in the leakage channel 220 will volatilize into the outside air and will not erode the hull.

[0059] In actual use, the heat-insulating brick 211 is a foam glass brick, which is a new type of inorganic heat-insulating material with a uniform independent closed air-gap structure, made from glass as the main raw material, adding an appropriate amount of foaming agent, and processed through high-temperature tunnel kiln heating and annealing and cooling. The foam glass brick not only has no toxicity itself, stable chemical properties, and good heat-insulating performance that will not deteriorate within a wide temperature range from ultra-low temperature to high temperature, but also plays the roles of moisture-proof, fire-proof, and anti-corrosion. When it is used in harsh environments such as cryogenic deep cooling, underground, open air, flammable, humid, and chemical erosion, it is not only safe and reliable but also durable, and is known as the "permanent heat-insulating material that does not need to be replaced". Therefore, it is widely used in the heat insulation and cold preservation of permanent projects such as petroleum, chemical industry, construction, cold storage, underground projects, shipbuilding, and national defense.

[0060] It can be understood that the heat-insulating brick 211 can also be a foam ceramic brick, etc.

[0061] In this embodiment, after the leakage channel 220 is fabricated, a first heat-insulating layer 230 is sprayed outside the outer shell 110 to keep the accommodation cavity cold and prevent the LNG liquid in the accommodation cavity from volatilizing due to excessive temperature, resulting in too high pressure in the accommodation cavity.

[0062] Preferably, the first heat insulation layer 230 can be a foaming material such as polyurethane, which has good heat preservation effect and low cost.

[0063] In this embodiment, as Figure 1 and Figure 4 shown, the first heat insulation layer 230 is flush with the diversion groove 210, so as to facilitate the installation of the first protective layer 240 in the next step.

[0064] Specifically, as Figure 2 shown, the enclosure system further includes a first protective layer 240, and the first protective layer 240 is arranged on the outer surface of the first heat insulation layer 230 to protect the first heat insulation layer 230 and eliminate the hidden danger of the first heat insulation layer 230 falling off.

[0065] In actual use, the first protective layer 240 is a wire mesh.

[0066] In this embodiment, as Figure 2 shown, the enclosure system further includes a first polyurea layer 250. The first polyurea layer 250 is connected to the first protective layer 240. Specifically, it is connected to the surface of the first protective layer 240 away from the outer shell 110.

[0067] Polyurea. Polyurea is an elastomeric substance formed by the reaction of an isocyanate component and an amino compound component. Its most basic characteristics are anti-corrosion, waterproof, wear-resistant, etc.

[0068] In this embodiment, by further arranging a first polyurea layer 250 outside the first protective layer 240, a closed surface is formed. At the same time, the risk of secondary leakage of the B-type cabin can be eliminated, that is, the risk of leakage to the outside through the leakage channel 220.

[0069] Furthermore, since the first heat insulation layer is a polyurethane layer, which has a potential risk of fire, by arranging the first polyurea layer 250, a flame retardant effect can also be achieved.

[0070] The B-type cabin provided in this embodiment, as Figure 1 and Figure 5 shown, the enclosure system further includes a plurality of first fixing rods 291 for connecting and fixing the first protective layer 240.

[0071] The B-type cabin includes a plurality of skeletons 120 for supporting the inside of the B-type cabin. The first fixing rods 291 and the skeletons 120 are arranged in one-to-one correspondence, that is, the quantity and the installation positions are in one-to-one correspondence.

[0072] Specifically, the framework 120 is disposed in the accommodation cavity and is connected to one side of the outer shell 110 close to the accommodation cavity. One end of the first fixing rod 291 is connected to the side of the outer shell 110 away from the accommodation cavity, and the other end is connected to the first protective layer 240. The connection point of the first fixing rod 291 and the outer shell 110 coincides with the connection point of the framework 120 and the outer shell 110, so as to improve the stability when the first fixing rod 291 is connected.

[0073] Specifically, in this embodiment, the first fixing rod 291 is a metal rod and is connected to the outer shell 110 by welding. Specifically, the welding point is the connection point of the framework 120 and the outer shell 110.

[0074] By providing the first fixing rod 291, the stability of the connection of the first protective layer 240 is improved.

[0075] In actual use, the welding of the first fixing rod 291 is carried out before spraying the first heat insulation layer 230.

[0076] In this embodiment, in the direction from the inside to the outside of the inner shell, the first heat insulation layer 230, the first protective layer 240, and the first polyurea layer 250 are arranged in sequence.

[0077] The B-type cabin provided in this embodiment, as Figure 1 shown, in order to improve the heat preservation effect, the enclosure system further includes a second heat insulation layer 260. The second heat insulation layer 260 is connected to the first polyurea layer 250.

[0078] In actual use, the second heat insulation layer 260 is also a polyurethane layer. After spraying the first polyurea layer 250, the second heat insulation layer 260 is sprayed.

[0079] At the same time, as Figures 1 to 4 shown, in order to prevent the second heat insulation layer 260 from falling off, a second protective layer 270 is further connected outside the second heat insulation layer 260. The material and function of the second protective layer 270 are the same as those of the first protective layer 240, and will not be elaborated here.

[0080] As Figure 3 shown, in order to improve the flame retardant effect and prevent secondary leakage of LNG liquid, a second polyurea layer 280 is further provided outside the second protective layer 270. It is the same as the first polyurea layer 250, and will not be elaborated here.

[0081] According to the B-type cabin provided in this embodiment, as Figure 3 shown, the enclosure system further includes a plurality of second fixing rods 292 for fixing the second protective layer 270.

[0082] One end of the second fixing rod 292 is connected to the first protective layer 240 , and the other end is connected to the second protective layer 270 . When installing the second fixing rod 292 , it should be set before spraying the second heat insulation layer 260 .

[0083] In this embodiment, it should be noted that any one of the second fixing rods 292 is staggered with the first fixing rod 291 to avoid a good heat transfer effect when the first fixing rod 291 and the second fixing rod 292 are directly connected, so that external heat is transferred to the accommodating cavity, or to avoid the low temperature in the outer shell 110 being transferred to the outside by the first fixing rod 291 and the second fixing rod 292, thereby improving the thermal insulation effect.

[0084] The B-type cabin provided in this embodiment is as follows Figure 4 As shown, the containment system further includes a gas pipeline 310; one end of the gas pipeline 310 is connected to a gas source, and the other end is disposed in the leakage channel 220 and communicated with the leakage channel 220. The ship further includes a vent mast, the vent mast is communicated with the outside, and the leakage channel 220 is communicated with the vent mast.

[0085] In actual use, the control member is arranged between the leakage channel and the air-permeable mast.

[0086] In this embodiment, preferably, the gas source may be nitrogen or an inert gas to avoid the risk of explosion after mixing with the volatilized LNG.

[0087] The ship is provided with a ventilation mast connected to the outside world, and the leakage channel 220 is connected to the outside world through the ventilation mast. At the same time, the gas source also wants to inflate the leakage channel 220, which can blow the volatilized LNG into the outside air to avoid corrosion of the hull and explosion.

[0088] like Figure 4 As shown, when the gas pipeline 310 is arranged in the leakage channel 220, it is connected to the housing 110 through the bracket 320. Specifically, the two ends of the bracket 320 are respectively welded to the housing 110 and the inner wall of the gas pipeline 310. At the same time, the gas pipeline 310 is preferably filled with compressed nitrogen, which has a lower temperature.

[0089] Another embodiment of the present invention further provides a ship, comprising the B-type cabin described in any of the above embodiments.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A type B cabin, for use in a ship, characterized in that, Comprising: A housing (110) and an enclosure system; The housing (110) is formed by welding a plurality of partition plates (111), an accommodation cavity is formed inside the housing (110), and a weld seam (1111) is provided between any two adjacent partition plates (111); The enclosure system includes a diversion channel (210) formed by adhesively bonding a plurality of heat insulation bricks (211) to each other. The extending direction of the diversion channel (210) is the same as the extending direction of the weld seam (1111). The diversion channel (210) and the housing (110) are connected to enclose a leakage channel (220), and all the weld seams (1111) are located inside the leakage channel (220). The leakage channel (220) communicates with the outside, and a control member for controlling the switch at the communication part is provided at the communication part; The enclosure system further includes a first heat insulation layer (230), and the first heat insulation layer (230) is connected to the housing (110); The enclosure system further includes a first protective layer (240), and the first protective layer (240) is a wire mesh; The first heat insulation layer (230) is flush with the diversion channel (210); The first protective layer (240) is connected to the first heat insulation layer (230) and the outer wall of the leakage channel (220); The enclosure system further includes a plurality of first fixing rods (291). The first fixing rods (291) are metal rods. The B-type cabin includes a plurality of skeletons (120), and the first fixing rods (291) and the skeletons (120) are arranged in one-to-one correspondence; The skeleton (120) is arranged inside the accommodation cavity and is connected to the side of the housing (110) close to the accommodation cavity. One end of the first fixing rod (291) is connected to the side of the housing (110) away from the accommodation cavity, and the other end is connected to the first protective layer (240); The connection point of the first fixing rod (291) and the housing (110) coincides with the connection point of the skeleton (120) and the housing (110).

2. The B-type cabin according to claim 1, characterized in that, The enclosure system further includes a first polyurea layer (250); The first polyurea layer (250) is connected to the first protective layer (240); 3. The B-type cabin according to claim 2, wherein The enclosure system further includes a second heat insulation layer (260); The second heat insulation layer (260) is connected to the first polyurea layer (250); 4. The B-type cabin according to claim 3, characterized in that, The enclosure system further includes a second protective layer (270); The second protective layer (270) is connected to the second heat insulation layer (260); 5. The B-type cabin according to claim 4, characterized in that The enclosure system further includes a second polyurea layer (280); The second polyurea layer (280) is connected to the second protective layer (270); 6. The B-type cabin according to claim 5, wherein, The enclosure system further includes a plurality of second fixing rods (292); One end of the second fixing rod (292) is connected to the first protective layer (240), and the other end is connected to the second protective layer (270); Any one of the second fixing rods (292) is arranged in a staggered manner with the first fixing rod (291); 7. The B-type cabin according to claim 1, wherein The enclosure system further includes a gas pipeline (310); One end of the gas pipeline (310) is connected to a gas source, and the other end is connected to the leakage channel (220); The ship further includes a breather mast which communicates with the outside, and the leakage channel (220) communicates with the breather mast.

8. The B-type cabin according to claim 1, characterized in that, The heat insulating brick (211) is a foam glass brick.

9. The Type B cabin according to claim 3, characterized in that, Both the first heat insulating layer (230) and the second heat insulating layer (260) are polyurethane layers.

10. The B-type cabin according to claim 4, characterized in that, The second protective layer (270) is a wire mesh.

11. A ship, characterized in that, It includes the B-type cabin according to any one of claims 1 to 10.

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