KR20160116223A - Lng storage tank and apparatus for absorbing impact of the same - Google Patents

Lng storage tank and apparatus for absorbing impact of the same Download PDF

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Publication number
KR20160116223A
KR20160116223A KR1020150043160A KR20150043160A KR20160116223A KR 20160116223 A KR20160116223 A KR 20160116223A KR 1020150043160 A KR1020150043160 A KR 1020150043160A KR 20150043160 A KR20150043160 A KR 20150043160A KR 20160116223 A KR20160116223 A KR 20160116223A
Authority
KR
South Korea
Prior art keywords
heat insulating
storage tank
insulating panel
natural gas
liquefied natural
Prior art date
Application number
KR1020150043160A
Other languages
Korean (ko)
Inventor
정왕조
Original Assignee
삼성중공업 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 삼성중공업 주식회사 filed Critical 삼성중공업 주식회사
Priority to KR1020150043160A priority Critical patent/KR20160116223A/en
Publication of KR20160116223A publication Critical patent/KR20160116223A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/02—Wall construction
    • B65D90/06—Coverings, e.g. for insulating purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/12—Supports
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/12—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge with provision for thermal insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/08—Mounting arrangements for vessels
    • F17C13/082—Mounting arrangements for vessels for large sea-borne storage vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0626—Multiple walls
    • F17C2203/0629—Two walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01—Mounting arrangements
    • F17C2205/0153—Details of mounting arrangements
    • F17C2205/018—Supporting feet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0105—Ships
    • F17C2270/0107—Wall panels

Abstract

The present invention relates to a device for absorbing shocks to a liquefied natural gas (LNG) tank equipped in a vessel including insulating panels (14, 15, 16) installed between a first barrier (11) of the LNG tank (10) and an inner hull (1) of the vessel and first supporting members (110) equipped between the inner hull (1) and the insulating panels (14, 15, 16). The first supporting member (110) is made of a metallic sponge structure. The metallic sponge structure is capable of supporting a load of the LNG tank (10) including the first barrier (11), a second barrier (12), and the insulating panels (14, 15, 16) and absorbing shocks due to sloshing of the LNG tank (10).

Description

Technical Field [0001] The present invention relates to a liquefied natural gas storage tank,

The present invention relates to a liquefied natural gas storage tank and its impact reducing apparatus, and more particularly to an apparatus for supporting a load of a liquefied natural gas storage tank and reducing a sloshing impact of the liquefied natural gas storage tank .

Liquefied natural gas (LNG) is a colorless transparent liquid with a volume reduced to 1/600 by cooling methane-based natural gas to -163 ° C. Storage tanks that store cryogenic LNG are very important. LNG storage tanks are made of cryogenic structures and materials for the liquefaction of natural gas. In the design of such an LNG storage tank, it is important to prevent boiling of liquefied natural gas due to heat transfer from the outside and to prevent leakage of liquefied natural gas.

The LNG storage tank is formed of a double-sealed structure including, for example, a primary barrier, an inner insulation panel, a secondary barrier, and an external insulation panel. The primary barrier contacts the LNG to seal the LNG first. The secondary barrier functions to seal the leaked LNG to prevent the LNG from touching the inner hull when the LNG leaks from the primary barrier. The external insulating panels of liquefied natural gas are attached to the inner hull by epoxy mastic.

Such an insulation panel may be provided with a sloshing impact due to the liquefied natural gas contained in the primary barrier. Particularly, when the cargo hold is enlarged in recent years, when such sloshing impacts are transmitted between the epoxy mastics disposed at mutually spaced intervals, bending stress is generated in the heat insulating panel, thereby causing a problem that the heat insulating panel is damaged.

An object of the present invention is to provide an impact reduction device for a liquefied natural gas storage tank having excellent load bearing and shock absorbing performance of a liquefied natural gas storage tank and a liquefied natural gas storage tank having the same .

The problems to be solved by the present invention are not limited to the above-mentioned problems. Other technical subjects not mentioned will be apparent to those skilled in the art from the description below.

According to an aspect of the present invention, there is provided an impact reduction device for a liquefied natural gas storage tank, comprising: a heat insulation panel installed between a primary barrier of the liquefied natural gas storage tank and an inner hull of the ship; And a first support member provided between the inner hull and the heat insulating panel to support the heat insulating panel, wherein the first support member includes a metal sponge structure.

The metal sponge structure can support the heat insulating panel with respect to the inner hull by contacting the upper surface of the metal sponge structure with the side of the heat insulating panel and the lower surface contacting with the inner hull side.

The impact reducing device of the liquefied natural gas storage tank may further include a second support member installed between the inner hull and the heat insulating panel to support the heat insulating panel, have.

Wherein the impact reducing device of the liquefied natural gas storage tank further comprises a wedge member provided between the inner hull and the heat insulating panel and the second support member comprises a lower flat portion ; An inclined portion extending upwardly from the periphery of the lower flat portion; And an upper flat portion extending in the horizontal direction from the periphery of the inclined portion, wherein the upper flat portion can be coupled between the wedge member and the heat insulating panel.

According to another aspect of the present invention, there is provided a liquefied natural gas comprising: a primary barrier that primarily seals liquefied natural gas; A secondary barrier formed between the primary barrier and the inner hull; An inner heat insulating panel formed between the primary barrier and the secondary barrier; And an external heat insulating panel formed between the inner hull and the secondary barrier, the liquefied natural gas storage tank further comprising a first support member formed between the inner hull and the outer heat insulating panel, There is provided a liquefied natural gas storage tank including a metal sponge structure.

The metal sponge structure may support the liquefied natural gas storage tank with respect to the inner hull while at the same time mitigating the impact of the liquefied natural gas storage tank.

The liquefied natural gas storage tank may further include a second support member installed between the inner hull and the outer heat insulating panel to support the liquefied natural gas storage tank, have.

According to the embodiment of the present invention, load bearing and shock absorbing performance of the liquefied natural gas storage tank can be secured at the same time.

The effects of the present invention are not limited to the effects described above. Unless stated, the effects will be apparent to those skilled in the art from the description and the accompanying drawings.

1 is a sectional view of a storage tank according to an embodiment of the present invention.
2 is an enlarged cross-sectional view of the portion 'A' of FIG.
3 is a side view showing a first support member constituting an impact reduction device of a liquefied natural gas storage tank according to an embodiment of the present invention.
4 is a cross-sectional view showing an impact reduction device of a liquefied natural gas storage tank according to another embodiment of the present invention.
5 is an enlarged cross-sectional view showing a second support member constituting the impact reduction device of the liquefied natural gas storage tank shown in FIG.
6 is a perspective view of a second support member constituting the impact reduction device of the liquefied natural gas storage tank shown in Fig.

Other advantages and features of the present invention and methods for accomplishing the same will be apparent from the following detailed description of embodiments thereof taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, and the present invention is only defined by the scope of the claims. Although not defined, all terms (including technical or scientific terms) used herein have the same meaning as commonly accepted by the generic art in the prior art to which this invention belongs. A general description of known configurations may be omitted so as not to obscure the gist of the present invention. In the drawings of the present invention, the same reference numerals are used as many as possible for the same or corresponding configurations. To facilitate understanding of the present invention, some configurations in the figures may be shown somewhat exaggerated or reduced.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises", "having", or "having" are intended to specify the presence of stated features, integers, steps, operations, components, Steps, operations, elements, parts, or combinations thereof, whether or not explicitly described or implied by the accompanying claims.

FIG. 1 is a cross-sectional view of a storage tank 10 according to an embodiment of the present invention, and FIG. 2 is an enlarged cross-sectional view of an 'A' portion of FIG.

1 and 2, the storage tank 10 includes a primary barrier 11, a secondary barrier 12, and adiabatic panels 14, 15, 16. The storage tank 10 is constructed such that the primary barrier 11, the inner thermal insulation panel 15 and the bridge panel 16, the secondary barrier 12 and the outer thermal insulation panel 14 form the inner hull from the storage space of the liquefied natural gas As shown in Fig.

The primary barrier 11 forms the inner wall of the storage tank 10 in direct contact with the liquefied natural gas. The primary barrier 11 firstly blocks the cold air of the liquefied natural gas and prevents the liquefied natural gas from leaking to the outside. The primary barrier 11 may be provided with a material resistant to low temperature resistance such as stainless steel for example.

On the other hand, the primary barrier 11 may be provided in a corrugated membrane structure in which the irregularities 11a are formed. The unevenness 11a serves as a buffer when the primary barrier 11 is thermally deformed by cold air of the liquefied natural gas, thereby preventing the primary barrier 11 from being damaged.

The insulating panels 14, 15, 16 block the cooling of the liquefied natural gas. The heat insulating panels 14, 15 and 16 may be provided with a material excellent in heat insulation property, for example, polyurethane foam.

The secondary barrier 12 is interposed between the outer heat insulating panel 14 and the inner heat insulating panel 15 and the bridge panel 16. [ The secondary barrier 12 secondarily blocks the cold of the liquefied natural gas after the primary barrier 11 and prevents the outflow of the liquefied natural gas. The secondary barrier 12 may be provided as a triplex.

A rigid triplex called a primary secondary barrier is interposed between the external heat insulating panel 14 and the internal heat insulating panel 15 and between the external heat insulating panel 14 and the bridge panel 16, A supple triplex called the car barrier can be intervened.

The construction method of the LNG storage tank 10 having the above-described double insulation structure may be as follows.

First, an external heat insulating panel 14 is installed on the inner hull 1. The external insulating panel 14 is supported via a fixing plate 18 by a support chuck 2 disposed on the inner hull 1 and is connected to the inner hull 1 by a stud bolt 3, 1). Here, the fixing plate 18 applies rigidity to the external heat insulating panel 14 to prevent the external heat insulating panel 14 from being deformed. The fixing plate 18 may be a flywood material.

On the other hand, a clearance may be generated between the outer heat insulating panels 14, and a flat joint 14a may be inserted between the adjacent outer heat insulating panels 14 to seal the gap therebetween. The flat joint 14a may be a glass fiber material such as glass wool.

When the external heat insulating panel 14 is installed, the internal heat insulating panel 15 is laminated on the upper part. Further, a secondary barrier 12 made of triplex is interposed between the external heat insulating panel 14 and the internal heat insulating panel 15.

The inner heat insulating panels 15 are spaced apart from each other on the outer heat insulating panel 14 by attaching a shuffle triplex or the like to the outer heat insulating panel 14 located between the inner heat insulating panels 15 After the secondary barrier 12 is constructed, the bridge panel 16 is inserted. Glass fiber or the like may be inserted into the clearance between the inner heat insulating panel 15 and the bridge panel 16 similarly to the flat joint 14a to seal the gap therebetween.

Finally, a fixing plate 18 is attached to the bridge panel 16 and the inner heat insulating panel 15 in the same manner as the external heat insulating panel 14 and the primary barrier 11 is fixed to the fixing plate 18 by an anchor strip . This completes the construction of the storage tank (10).

The apparatus for reducing impact of a liquefied natural gas storage tank according to an embodiment of the present invention is a device for supporting a load of a liquefied natural gas storage tank 10 provided in a ship and reducing a shock, 15 and 16 provided between the inner shell 1 and the inner hull 1 and a first support member 110 for supporting the heat insulation panels 14, 15 and 16.

3 is a side view showing a first support member 110 constituting an impact reduction device of a liquefied natural gas storage tank according to an embodiment of the present invention. Referring to FIGS. 2 and 3, the first support member 110 includes a metal sponge structure 111.

A spongy structure (cavernous body) 111 is provided between the inner hull 1 and the heat insulating panels 14, 15 and 16 to form a primary barrier 11, a secondary barrier 12, (14, 15, 16), while reducing impact due to sloshing of the LNG storage tank.

The metal sponge structure 111 is made of a metal material and has a sponge-like structure. The metal sponge structure 111 may be a structure having a large number of remaining holes, such as a sponge shape. The metal sponge structure 111 may be provided with a material resistant to low temperature resistance such as, for example, stainless steel.

The metal sponge structure 111 has an upper surface contacting the side of the heat insulating panel 14 with the fixing plate 18 interposed therebetween and a lower surface contacting the inner hull 1 side, The heat insulating panels 14, 15 and 16 can be elastically supported. The metal sponge structures 111 load-bear the load of the LNG storage tank with respect to the inner hull 1 and absorb energy of the LNG storage tank.

FIG. 4 is a cross-sectional view showing an impact reduction device of a liquefied natural gas storage tank according to another embodiment of the present invention, FIG. 5 is a cross- FIG. 6 is a perspective view of a second supporting member constituting the impact reducing device of the liquefied natural gas storage tank shown in FIG. 4; FIG.

4 and 5, the second supporting member 120 is further provided between the inner hull 1 and the heat insulating panels 14, 15 and 16 together with the first supporting member 110, 2 in that a wedge member 130 is provided between the external heat insulating panel 1 and the external heat insulating panel 14. [

The second support member 120 may have a leaf spring structure. The plate spring is installed between the inner hull 1 and the heat insulating panels 14, 15 and 16 to form the primary barrier 11, the secondary barrier 12 and the heat insulating panels 14, 15 and 16, The load of the LNG storage tank is buffered while the load of the LNG storage tank is supported.

The second support member 120 includes a lower flat portion 121, an inclined portion 122, and an upper flat portion 123. The lower flat portion 121 abuts the inner hull 1 and is arranged in the horizontal direction. The inclined portion 122 extends radially upward from the periphery of the lower flat portion 121 to be inclined upward.

The upper flat portion 123 is formed to extend in the horizontal direction from the periphery of the slope portion 122. The upper flat portion 123 has a size corresponding to the wedge member 130 and can be coupled between the wedge member 130 and the heat insulating panel 14, 15, 16 by means of bolts or the like.

According to the embodiments shown in FIGS. 4 and 5, it is possible to improve the load-carrying performance of the LNG storage tank and the shock-absorbing performance against sloshing by using the leaf spring structure together with the metal sponge structure. Further, by using the upper flat portion 123 of the second support member 120 of the plate spring structure, when the heat insulating panels 14, 15, 16 are engaged with the inner hull 1, And they can be pre-assembled and used in the heat insulating panels 14, 15, and 16.

It is to be understood that the above-described embodiments are provided to facilitate understanding of the present invention, and do not limit the scope of the present invention, and it is to be understood that various modifications are possible within the scope of the present invention. It is to be understood that the technical scope of the present invention should be determined by the technical idea of the claims and the technical scope of protection of the present invention is not limited to the literary description of the claims, To the invention of the invention.

3: Stud bolt 10: Storage tank
11: primary barrier 12: secondary barrier
14: external heat insulating panel 15: internal heat insulating panel
16: Bridge panel 18: Fixing plate
110: first support member 111: metal sponge structure
120: second support member 121: lower flat part
122: an inclined portion 123: an upper flat portion
130: Wedge member

Claims (4)

An apparatus for reducing the impact of a liquefied natural gas storage tank on a ship,
A heat insulation panel installed between the primary barrier of the liquefied natural gas storage tank and the inner hull of the ship; And
And a first support member provided between the inner hull and the heat insulating panel to support the heat insulating panel,
Wherein the first support member comprises a metal sponge structure. The method according to claim 1,
Wherein the metal sponge structure has an upper surface abutting the side of the heat insulating panel and a lower surface abutting the inner hull to support the heat insulating panel against the inner hull. The method according to claim 1,
And a second support member provided between the inner hull and the heat insulating panel to support the heat insulating panel,
Wherein the second support member comprises a leaf spring. The method of claim 3,
Further comprising a wedge member provided between the inner hull and the heat insulating panel,
Wherein the second support member comprises:
A lower flat portion in contact with the inner hull and arranged in a horizontal direction;
An inclined portion extending upwardly from the periphery of the lower flat portion; And
And an upper flat portion extending in the horizontal direction from the periphery of the inclined portion,
Wherein the upper flat portion is coupled between the wedge member and the heat insulating panel.
KR1020150043160A 2015-03-27 2015-03-27 Lng storage tank and apparatus for absorbing impact of the same KR20160116223A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150043160A KR20160116223A (en) 2015-03-27 2015-03-27 Lng storage tank and apparatus for absorbing impact of the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150043160A KR20160116223A (en) 2015-03-27 2015-03-27 Lng storage tank and apparatus for absorbing impact of the same

Publications (1)

Publication Number Publication Date
KR20160116223A true KR20160116223A (en) 2016-10-07

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102327634B1 (en) * 2020-07-31 2021-11-16 현대중공업 주식회사 Liquefied gas storage tank and vessel comprising the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102327634B1 (en) * 2020-07-31 2021-11-16 현대중공업 주식회사 Liquefied gas storage tank and vessel comprising the same

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