阅读说明：本技术 液化气储罐支撑结构 (Liquefied gas storage tank supporting structure ) 是由 金翼洙 赵祥训 沈明智 于 2018-10-15 设计创作，主要内容包括：液化气储罐支撑结构包括支撑液化气储罐的支撑块、及配置于上述支撑块的下方而支撑上述支撑块并配置于船体面上的支撑凳。上述支撑块包括形成上述支撑块的外部面且沿着垂直于上述船体面的方向的第一方向延长的外壁、配置于上述外壁内且与上述外壁隔开的上部突出部、以及连接上述外壁和上述上部突出部的凹槽。上述外壁及上述上部突出部之间形成包围上述上部突出部的空间。(The liquefied gas storage tank supporting structure comprises a supporting block for supporting the liquefied gas storage tank and a supporting stool which is arranged below the supporting block, supports the supporting block and is arranged on the hull surface. The support block includes an outer wall forming an outer face of the support block and extending in a first direction perpendicular to the hull face, an upper protrusion disposed within the outer wall and spaced apart from the outer wall, and a groove connecting the outer wall and the upper protrusion. A space surrounding the upper protruding portion is formed between the outer wall and the upper protruding portion.)

1. A liquefied gas storage tank structure, comprising:

a support block supporting the liquefied gas storage tank and elongated in a first direction perpendicular to a hull surface; and

a support stool disposed below the support block to support the support block and disposed on the hull surface,

a space elongated in the first direction is formed inside the support block so that moisture formed on a surface of the liquefied gas storage tank having a low temperature flows along the space,

wherein the moisture is formed ice.

2. A liquefied gas storage tank structure according to claim 1,

the supporting block includes:

an outer wall forming an exterior face of the support block and elongated along the first direction;

an upper protrusion disposed within the outer wall and spaced apart from the outer wall; and

a groove connecting the outer wall and the upper protrusion,

a space surrounding the upper protruding portion is formed between the outer wall and the upper protruding portion.

3. A liquefied gas storage tank structure according to claim 2,

the upper protruding part is formed with an inclined surface connected to the groove from an upper surface of the upper protruding part, thereby forming the space between the inclined surface and the outer wall.

4. A liquefied gas storage tank structure according to claim 3,

the groove is formed with an icing discharge passage formed in a direction toward a lower surface of the support block along the first direction.

5. A liquefied gas storage tank structure according to claim 1,

the support block is formed from a fibre reinforced plastic.

6. The liquefied gas storage tank structure as claimed in claim 4, further comprising:

an ice discharge hose connected to the ice discharge channel.

7. A liquefied gas storage tank structure according to claim 1,

the surface of the liquefied gas storage tank except for the portion where the support block is disposed is formed with an insulating material such that the insulating material is in contact with the liquefied gas storage tank and the outer wall of the support block.

8. A liquefied gas storage tank structure according to claim 1,

the supporting block includes:

an inner block; and

an outer block spaced apart from the inner block by a prescribed distance so as to wrap the inner block,

the inner block and the outer block form the space therebetween.

9. The liquefied gas storage tank structure as claimed in claim 8, further comprising:

an adhesive layer disposed between the upper surface of the supporting stool and the supporting block,

the upper surface of the supporting stool is provided with a first lower bracket for accommodating the lower part of the external block and a second lower bracket for accommodating the lower part of the internal block,

the outer block is disposed between the first and second lower brackets on a plane perpendicular to the first direction.

10. A liquefied gas storage tank structure as claimed in claim 9,

the second sub-bracket is formed with an opening that allows the ice to flow.

11. The liquefied gas storage tank structure as claimed in claim 9, further comprising:

a first elastic member disposed between the first lower bracket and the outer block;

a second elastic member disposed between the inner blocks of the second bottom bracket.

12. A liquefied gas storage tank structure according to claim 1,

a reinforcing plate attached to a surface of the liquefied gas storage tank is further disposed between the liquefied gas storage tank and the support block, and an upper bracket that receives the upper protruding portion of the support block is formed on the reinforcing plate.

13. A liquefied gas storage tank structure as claimed in claim 12,

the support block and the reinforcing plate are not adhered, and the upper bracket is formed to be larger than an outer diameter of the upper protrusion so that the support block and the reinforcing plate slide each other when the liquefied gas storage tank thermally contracts and expands.

14. The liquefied gas storage tank structure as claimed in claim 1, further comprising:

an adhesive layer disposed between an upper surface of the supporting stool and a lower surface of the supporting block,

the upper surface of the supporting stool is provided with a lower bracket for accommodating the lower surface of the supporting block,

an elastic member is disposed between the lower bracket and the support block.

Technical Field

The present invention relates to a support structure for a liquefied gas storage tank, and more particularly, to a support structure for supporting a liquefied gas storage tank provided at a ship body.

Background

Generally, natural gas is transported in a gaseous state through a gas pipeline on land or sea, or stored in a transport ship in a Liquefied Natural Gas (LNG) state and transported to a remote consumption site. Liquefied natural gas is obtained by cooling natural gas to an extremely low temperature of about-163 ℃, and its volume is reduced to about 1/600 compared to natural gas in a gaseous state, thereby facilitating remote transportation by sea.

On the other hand, in order to use the transported liquefied natural gas as a natural gas fuel for ships, a tank for storing the liquefied natural gas is provided, and natural gas is used as a fuel for many kinds of ships. Ships using natural gas as a fuel can reduce fuel costs compared to existing ships using petroleum-based fuels, and have low emissions of air pollutants such as nitrogen oxides and sulfur oxides, and thus are evaluated as environmentally friendly marine transportation vehicles. In addition, due to the trend of reducing global greenhouse gas emissions, the spread of ships fueled with liquefied natural gas has been rapidly spreading in recent years.

If a liquefied gas storage tank storing such a liquefied gas in a very low temperature state is mounted on a ship body, low-temperature moisture (icing) is formed on the surface of the liquefied gas storage tank and flows down along the ship body due to the liquefied gas in the very low temperature state, thereby causing damage to the ship body and an insulation material.

[ Prior art documents ]

[ patent document ]

Korean laid-open patent publication No. 10-2018-0052138

Disclosure of Invention

Technical problem to be solved by the invention

Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a liquefied gas storage tank support structure that can prevent damage to a ship body and a heat insulating material due to freezing.

Technical scheme

A liquefied gas storage tank support structure according to an embodiment for achieving the above object of the present invention includes: the support device comprises a support block for supporting the liquefied gas storage tank and a support bench arranged below the support block, supporting the support block and being arranged on the surface of the ship body. The support block includes an outer wall forming an outer surface of the support block and extending in a first direction perpendicular to the hull surface, an upper protrusion disposed in the outer wall and spaced apart from the outer wall, and a groove (groove) connecting the outer wall and the upper protrusion. A space surrounding the upper protruding portion is formed between the outer wall and the upper protruding portion.

In an embodiment of the present invention, the upper protrusion may be formed with an inclined surface connected to the groove from an upper surface of the upper protrusion. The space may be formed between the inclined surface and the outer wall.

In an embodiment of the present invention, the groove may be formed with an ice discharge passage formed along the first direction toward a lower surface of the support block.

In an embodiment of the present invention, if ice is formed due to a temperature difference between the liquefied gas storage tank and the support block, the ice may flow along the inclined surface and be discharged through the ice discharge passage of the groove.

In one embodiment of the present invention, the supporting block may be made of a Fiber Reinforced Plastic (FRP) material.

In an embodiment of the present invention, the tank support structure may further include an ice discharge hose connected to the ice discharge channel.

In an embodiment of the present invention, a heat insulating material is formed on a surface of the liquefied gas storage tank except for a portion where the support block is disposed such that the heat insulating material is in contact with outer walls of the liquefied gas storage tank and the support block.

In an embodiment of the present invention, a reinforcing plate attached to a surface of the liquefied gas storage tank may be disposed between the liquefied gas storage tank and the support block, and the reinforcing plate may be formed with an upper bracket that receives the upper protrusion of the support block.

In an embodiment of the present invention, the support block and the reinforcing plate are not adhered to each other, and the upper bracket is formed to have a larger outer diameter than the upper protrusion, so that the support block and the reinforcing plate slide each other when the liquefied gas storage tank is thermally contracted and expanded.

In an embodiment of the present invention, the liquefied gas storage tank may further include an adhesive layer disposed between an upper surface of the supporting stool and a lower surface of the supporting block. The upper surface of the supporting stool may be formed with a lower bracket for receiving the lower surface of the supporting block.

Advantageous effects

According to an embodiment of the present invention, the liquefied gas storage tank supporting structure includes a supporting block supporting the liquefied gas storage tank, and a supporting stool (support stool) disposed below the supporting block to support the supporting block and disposed on a hull surface. The support block includes an outer wall forming an outer surface of the support block and extending in a first direction perpendicular to the hull surface, an upper protrusion disposed in the outer wall and spaced apart from the outer wall, and a groove (groove) connecting the outer wall and the upper protrusion. A space surrounding the upper protruding portion is formed between the outer wall and the upper protruding portion.

Accordingly, even if ice (icing) is formed on the surface of the liquefied gas storage tank containing the low-temperature liquefied gas, the ice can be discharged without damaging the heat insulating material or the hull surface, and thus the durability and safety of the liquefied gas storage tank support structure can be improved.

However, the effects of the present invention are not limited to the above-described effects, and various extensions can be made without departing from the scope of the idea and the field of the present invention.

Drawings

Fig. 1 is a side sectional view of a liquefied gas storage tank support structure according to an embodiment of the present invention.

Fig. 2 is a perspective view of a support block 100 of the liquefied gas storage tank support structure of fig. 1.

Fig. 3 is a view for explaining the freezing discharge of the liquefied gas storage tank support structure of fig. 1.

Fig. 4 is a view for explaining damage caused by freezing of a support structure of a liquefied gas storage tank according to the related art.

Fig. 5 is a side sectional view of a liquefied gas storage tank support structure according to an embodiment of the present invention.

Fig. 6 is an exploded perspective view illustrating the structures of the inner block 300, the outer block 350, the first elastic body ES1 and the second elastic body ES2, and the upper surface 210 of the supporting stool 200 of the liquefied gas storage tank supporting structure of fig. 5.

Description of the reference numerals:

10: hull surface 20: liquefied gas storage tank

22: the reinforcing plate 24: upper bracket

100: the supporting block 110: outer wall

120: upper protruding portion 122: inclined plane

124: groove 130: ice forming drain passage

140: lower face 200: supporting stool

212: lower bracket 220: icing discharge hose

230: adhesive layer 300: inner block

350: outer block

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown in the drawings and will herein be described in detail. However, the present invention is not limited to the specific embodiments disclosed, and all modifications, equivalents, and alternatives included in the spirit and technical scope of the present invention are understood to be included.

Fig. 1 is a side sectional view of a liquefied gas storage tank support structure according to an embodiment of the present invention. Fig. 2 is a perspective view of a support block 100 of the liquefied gas storage tank support structure of fig. 1.

Referring to fig. 1 and 2, the liquefied gas storage tank support structure may include support blocks 100 and support stools 200.

Liquefied gas storage tank 20 may be configured to be supported on hull surface 10 by the liquefied gas storage tank support structure described above.

The hull surface 10 is a surface on which the liquefied gas Storage tank is installed, and may be a hull surface of various offshore structures such as a liquefied natural gas carrier that needs to store and store low-temperature liquefied natural gas, a Floating Production Storage and Offloading (FPSO), a Floating Storage and Regasification Unit (LNG FSRU), and the like.

The liquefied gas storage tank 20 is provided to receive and store liquefied natural gas therein, and is supported by a plurality of the liquefied gas storage tank support structures. Only a portion of the liquefied gas storage tank 20 and a support structure are shown. The liquefied gas storage tank 20 may be made of a cryogenic special steel material such as aluminum steel, stainless steel, and 35% nickel steel.

The liquefied gas storage tank 20 may be wrapped with an insulation material 26 except for the portion where the support block 100 is located. That is, the insulation 26 may contact the liquefied gas storage tank and the outer wall 110 of the supporting block 100. The heat insulating material 26 may insulate the inside of the liquefied gas storage tank 20 containing the liquefied gas having a low temperature from the outside. The heat insulating material 26 may be formed of a material such as polyurethane foam (PUF) or perlite (perlite).

The liquefied gas storage tank 20 has the supporting block 100 below it so that the liquefied gas storage tank 20 can be supported. A reinforcing plate 22 attached to a surface of the liquefied gas storage tank may be disposed between the support block 100 and the liquefied gas storage tank 20.

The supporting block 100 includes an outer wall 110 and an upper protrusion 120, and a space US may be formed between the outer wall 110 and the upper protrusion 120. The outer wall 110 forms an outer face of the support block 100 and may be elongated in a first direction D1 perpendicular to the hull face 10. The outer wall 110 of the support block 100 may be formed in a cylindrical shape, but is not limited thereto. For example, the supporting block 100 may be formed in a hexahedral shape.

The space US may be formed in a shape in which a part of the upper surface of the supporting block 100 is recessed from the upper surface toward the first direction D1 by a predetermined depth, and may be formed between the upper protrusion 120 and the outer wall 110. That is, the upper protrusion 120 may be disposed in the outer wall 110 to be spaced apart from the outer wall 110.

The upper surface of the upper protrusion 120 and the upper surface of the outer wall 110 have the same height from the lower surface 140 of the support block 110, so that the upper surface of the upper protrusion 120 and the upper surface of the outer wall 110 may be disposed to contact the reinforcing plate 22.

The lower portion of the space US may be formed with a groove 124. If ice is formed due to a temperature difference between the liquefied gas storage tank 20 and the support block 100, the ice flows along the inclined surface and is collected in the groove 124 to be discharged to the outside.

In the space US, an inclined surface 122 may be formed along the first direction D1 from an upper surface of the upper protrusion 120. The inclined surface 122 is a surface for allowing the ice generated at the portion where the liquefied gas storage tank 20 and the upper protrusion 120 are in contact with each other to flow downward, and may be formed to be inclined at a predetermined angle.

An ice discharge passage 130 may be formed from the groove 124 to the lower surface 140 of the support block 100 along the first direction D1. The icing discharge passage 130 may be formed in a plurality of numbers, and in the present embodiment, four icing discharge passages are formed to be spaced apart from each other, but not limited thereto, and the icing discharge passage 130 may have an appropriate number and shape to discharge the icing accumulated in the groove 124 to the outside.

The support block 100 may be made of a Fiber Reinforced Plastic (FRP) material such as a low temperature steel material such as aluminum, SUS, or the like, wood (plywood), or a glass fiber reinforced thermoplastic (GMT) material or a glass fiber reinforced plastic (GRP) material. The support block 100 is preferably formed of a fiber reinforced plastic in view of ease of preparation.

Here, the reinforcing plate 22 may be formed with an upper bracket 24 to limit a sliding range of the supporting block 100. The upper bracket 24 is formed to have a larger outer diameter than the upper protrusion 120 of the support block 100 so that the upper protrusion of the support block is received in the upper bracket 24. As the liquefied gas storage tank 20 contracts and expands, the support block 100 and the liquefied gas storage tank 20 may slide to some extent on a plane perpendicular to the first direction D1. Thus, the supporting block 100 and the reinforcing plate 22 of the liquefied gas storage tank 20 are not adhered to each other.

On the other hand, an adhesive layer 230 may be formed between the upper surface 210 of the supporting stool 200 and the lower surface of the supporting block 100. The upper surface 210 of the supporting stool 200 may be formed with a lower bracket 212 receiving the lower surface 140 of the supporting block 100. The supporting blocks 100 may be fixed to the supporting stools 200 by the adhesive layers 230, and the supporting stools 200 may be fixed to the hull surface 10 by welding, etc.

The support stool 200 may be provided with an icing discharge hose 220 to discharge the icing to the outside of the liquefied gas storage tank support structure. The icing discharge hose 220 may be connected to the icing discharge passage 130 of the support block 100.

Fig. 3 is a view for explaining the freezing discharge of the liquefied gas storage tank support structure of fig. 1. Fig. 4 is a view for explaining damage caused by freezing of a support structure of a liquefied gas storage tank according to the related art.

According to the related art of fig. 4, ice (icing) is formed on the surface of the liquefied gas storage tank 20 containing low-temperature liquefied gas by transferring heat through a portion where the support block 1 and the liquefied gas storage tank 20 are in contact with each other. The ice will flow downwards due to gravity and towards the space between the support block 1 and the insulation 26 (see arrows in the figure), whereby the ice may cause damage to the insulation 26 and the hull surface 10.

As described above, in the case where the liquefied gas storage tank 20 is a stand-alone type storage tank, since a support structure is provided at a lower portion of the storage tank, a portion where the support structure and the storage tank are in contact with each other has a structure in which it is difficult to form and wrap a heat insulator (spray-on polyurethane foam) or the like. Therefore, as described above, as heat penetrates into the above-described support structure portion, icing inevitably occurs, and damage due to icing also occurs.

Referring to fig. 2 and 3, according to the present invention, ice (icing) may be formed on the surface of the liquefied gas storage tank 20 containing low-temperature liquefied gas by transferring heat through a portion where the support block 100 meets the reinforcing plate 22 of the liquefied gas storage tank 20. The ice flows downward along the inclined surface 122 of the space US of the support block 100, is collected in the groove 124, and is discharged through the ice discharge passage 130 (refer to an arrow in the drawing). The ice may be collected to a desired place, such as an additional container (not shown) or the like, and then disposed of, using the ice discharge hose 220 connected to the ice discharge passage 130.

Accordingly, even if ice (icing) is formed on the surface of the liquefied gas storage tank 20 containing the liquefied gas having a low temperature, the ice can be discharged without damaging the heat insulating material 26 or the hull surface 10, and thus the durability and safety of the liquefied gas storage tank support structure can be improved.

According to an embodiment of the present invention, the liquefied gas storage tank supporting structure includes a supporting block supporting the liquefied gas storage tank, and a supporting stool (support stool) disposed below the supporting block to support the supporting block and disposed on a hull surface. The support block includes an outer wall forming an outer surface of the support block and extending in a first direction perpendicular to the hull surface, an upper protrusion disposed within the outer wall and spaced apart from the outer wall, and a groove (groove) connecting the outer wall and the upper protrusion. A space surrounding the upper protruding portion is formed between the outer wall and the upper protruding portion.

Therefore, even if ice (icing) is formed on the surface of the liquefied gas storage tank containing the low-temperature liquefied gas, the ice can be discharged without damaging the heat insulating material or the hull surface, and thus the durability and safety of the liquefied gas storage tank support structure can be improved.

Fig. 5 is a side sectional view of a liquefied gas storage tank support structure according to an embodiment of the present invention. Fig. 6 is an exploded perspective view illustrating the structure of the support block including the inner block 300 and the outer block 350 of the liquefied gas storage tank support structure of fig. 5, the first elastic body ES1 and the second elastic body ES2, and the upper surface 210 of the support stool 200.

Referring to fig. 5 and 6, the above-described liquefied gas tank support structure is substantially the same as the liquefied gas tank support structure of fig. 1 and 2 except for a support block including an inner block 300 and an outer block 350, first and second elastic bodies ES1 and ES2, and first and second lower brackets 212 and 214. Therefore, the repeated description will be simplified or omitted.

The liquefied gas storage tank supporting structure may include the supporting block and the supporting stool 200. The support blocks may include the inner block 300 and the outer block 350.

The liquefied gas storage tank 20 may be configured to be supported on the hull surface 10 by the liquefied gas storage tank support structure.

The liquefied gas storage tank 20 may be wrapped with an insulating material 26 except for the portion where the support block is located. That is, the insulation material 26 may contact the liquefied gas storage tank and the outer wall of the outer block 350.

The inner block 300 is provided below the liquefied gas storage tank 20 so as to support the liquefied gas storage tank 20. A reinforcing plate 22 attached to the surface of the liquefied gas storage tank may be disposed between the inner block 300 and the liquefied gas storage tank 20.

The inner block 300 may have a hexahedral shape extending in the first direction D1 as a height direction.

The outer block 350 may wrap the inner block 300 at a predetermined distance from a side surface thereof. That is, the outer block 350 may have a rectangular pipe shape elongated along the first direction D1. Accordingly, a space SS is formed between the first inner block 300 and the outer block 350, the space SS can be used as a space in which ice flows down, and a space in which ice flows down in the first direction D1 along the surface of the first inner block 300 or the inner side of the outer block 350 can be secured.

On the other hand, in the present embodiment, the case where the inner block 300 has a hexahedral shape has been described, but the present invention is not limited thereto. For example, the inner block 300 may be formed in a cylindrical shape, and the outer block 350 may be formed in a cylindrical pipe (pipe) shape.

The inner block 300 and the outer block 350 may be made of a low temperature steel material such as aluminum, SUS, or wood (plywood), or a Fiber Reinforced Plastic (FRP) material such as GMT or GRP. In view of ease of preparation, the inner block 300 and the outer block 350 are preferably formed of fiber reinforced plastic, and the inner block 300 and the outer block 350 may be formed of different materials from each other or the same material as each other.

Here, the reinforcing plate 22 may be formed with an upper bracket 24 to limit a sliding range of the inner block 300.

On the other hand, an adhesive layer 230 may be formed between the upper surface 210 of the stool 200 and the lower surface of the inner block 300. An adhesive layer 230 may be formed between the upper surface 210 and the outer block 350.

The upper surface 210 of the stool 200 may be formed with a first lower bracket 212 receiving a lower portion of the outer block 350. The first lower bracket 212 may protrude from the upper surface 210 in a direction opposite to the first direction D1.

In this case, the first elastic member ES1 may be disposed between the first lower bracket 212 and the outer block 350. The first elastic member ES1 may be adhered to the upper surface 210 by the adhesive layer 230 disposed between the first elastic member ES1 and the upper surface.

The upper surface 210 of the stool 200 may be formed with a second lower bracket 214 receiving a lower portion of the inner block 300. The second lower bracket 214 may protrude from the upper surface 210 in a direction opposite to the first direction D1, and may have an opening 214a formed therein to allow ice to flow therethrough.

That is, the outer block 350 may be disposed between the first and second lower brackets 212 and 214 on a plane perpendicular to the first direction D1.

In this case, the second elastic member ES2 may be disposed between the second bottom bracket 214 and the inner block 300. The second elastic member ES2 may be adhered to the upper surface 210 by the adhesive layer 230 disposed between the second elastic member ES 2.

The first elastic member ES1 and the second elastic member ES2 may include an elastic material, such as rubber. The spaces between the first lower bracket 212 and the outer block 350 and between the second lower bracket 214 and the inner block 300 are filled by the first elastic member ES1 and the second elastic member ES2, so that the outer block 350 and the inner block 300 can be moved to distribute the concentration of load, thereby preventing the liquefied gas storage tank supporting structure from being damaged.

A discharge port H for discharging ice is formed in the upper surface 210 of the stool 200 toward the inside of the outer block 350. The discharge opening H is disposed between the inner block 300 and the outer block 350, for example, between the second lower bracket 214 and the outer block 350, on a plane perpendicular to the first direction D1.

The inner block 300 and the outer block 350 may be fixed to the stool 200 by the adhesive layer 230, and the stool 200 may be fixed to the hull surface 10 by welding or the like.

The support stool 200 may be provided with an icing discharge hose 220 connected to the discharge port H for discharging the icing to the outside of the liquefied gas storage tank support structure.

While the foregoing has been with reference to the embodiments, those skilled in the relevant art will recognize that the invention can be practiced with modification within the spirit and scope of the claims.