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KR100751696B1 - Structure of Extended Spherical LUN Storage Tank - Google Patents

Structure of Extended Spherical LUN Storage Tank Download PDF

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Publication number
KR100751696B1
KR100751696B1 KR1020060050523A KR20060050523A KR100751696B1 KR 100751696 B1 KR100751696 B1 KR 100751696B1 KR 1020060050523 A KR1020060050523 A KR 1020060050523A KR 20060050523 A KR20060050523 A KR 20060050523A KR 100751696 B1 KR100751696 B1 KR 100751696B1
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South Korea
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point
lng storage
tank
storage tank
curvature
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Expired - Fee Related
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KR1020060050523A
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Korean (ko)
Inventor
민계식
김외현
최익흥
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현대중공업 주식회사
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Priority to KR1020060050523A priority Critical patent/KR100751696B1/en
Priority to CN2007800229201A priority patent/CN101473162B/en
Priority to PCT/KR2007/000890 priority patent/WO2007142400A1/en
Priority to JP2009514188A priority patent/JP2009540233A/en
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Publication of KR100751696B1 publication Critical patent/KR100751696B1/en
Priority to NO20085116A priority patent/NO335482B1/en
Priority to JP2012181870A priority patent/JP5603906B2/en
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    • 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
    • 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
    • F17C3/00—Vessels not under pressure
    • F17C3/02—Vessels not under pressure with provision for thermal insulation
    • F17C3/025—Bulk storage in barges or on ships
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0147—Shape complex
    • 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
    • F17C2203/0614—Single wall
    • F17C2203/0619—Single wall with two layers
    • 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
    • F17C2205/0123—Mounting arrangements characterised by number of vessels
    • F17C2205/013—Two or more 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
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/22—Assembling processes
    • F17C2209/221—Welding
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0146—Two-phase
    • F17C2225/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2225/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

본 발명은 연장 구형 LNG 저장탱크의 구조에 관한 것으로, 그 목적은 LNG 운반선에 탑재되는 LNG 저장탱크의 연결부와 상,하부탱크부의 이음부를 완만하게 형성하여, LNG 저장탱크의 저장용량을 증대시켜주는 한편, 이음부에 가해지는 응력집중현상을 완화시켜주는 연장 구형 LNG 저장탱크의 구조를 제공함에 있다.The present invention relates to a structure of an extended spherical LNG storage tank, the object of which is to form a joint portion of the LNG storage tank mounted on the LNG carrier and the joints of the upper and lower tanks gently, thereby increasing the storage capacity of the LNG storage tank. On the other hand, it is to provide a structure of an extended spherical LNG storage tank that mitigates the stress concentration applied to the joint.

상기 목적을 달성하기 위한 본 발명은, 곡률반경 R을 가지는 상부탱크부 및 하부탱크부와, 상기 상부탱크부와 하부탱크부의 사이에 설치되어 LNG 저장용량이 확대되도록 하는 연결부로 이루어진 LNG 저장탱크의 구조에 있어서,The present invention for achieving the above object, of the LNG storage tank consisting of an upper tank portion and a lower tank portion having a radius of curvature R and a connecting portion installed between the upper tank portion and the lower tank portion to expand the LNG storage capacity In structure,

상기 연결부는 연결부의 중심점을 폭방향으로 가로지르는 중심라인 상의 임의의 점으로부터 상기 상부탱크부 및 상기 하부탱크부의 곡률중심점을 지나 연장되어 상부탱크부 및 하부탱크부의 원호와의 교차점을 시작점과 끝점으로 하며, 상기 임의의 점으로부터 상기 교차점까지의 거리를 곡률반경 R1으로 하는 원호에 의해 형성되거나, 또는 상부탱크부의 원호상에 위치한 임의의 한점을 시작점으로 하고, 상기 하부탱크부의 원호상에 위치하되, 상기 시작점과 대칭되는 위치에 있는 한 점을 끝점으로 하는 포물선에 의해 형성되되, 상기 시작점 및 끝점에서의 포물선에 대한 접선의 기울기가 동일 위치에서의 상부탱크부 및 하부탱크부에 대한 접선의 기울기와 동일한 포물선에 의해 형성되는 것을 그 기술적 요지로 한다.The connecting portion extends from an arbitrary point on the center line crossing the center point of the connecting part in the width direction beyond the center of curvature of the upper tank part and the lower tank part so that the intersection point between the arcs of the upper tank part and the lower tank part is the starting point and the end point. It is formed by a circular arc having a radius of curvature R 1 from the arbitrary point to the intersection point, or located on an arc of the lower tank part with a starting point at any one point located on the arc of the upper tank part. And a parabola having an end point at a position symmetrical with the starting point, wherein the slope of the tangent line with respect to the parabola at the starting point and the end point is the slope of the tangent line with respect to the upper tank portion and the lower tank portion at the same position. The technical gist of which is formed by the same parabola as.

Description

연장 구형 ＬＮＧ 저장탱크의 구조 {Structure of extended spherical LNG storage tank}Structure of extended spherical LNG storage tank

도 1 은 종래의 LNG 운반선의 구형 LNG 저장탱크의 탑재구조 및 조종시선을 나타낸 예시도,1 is an exemplary view showing the mounting structure and the steering line of the old LNG storage tank of the conventional LNG carrier,

도 2 는 종래의 원통 삽입 LNG 저장탱크를 탑재한 LNG 운반선을 나타낸 예시도,Figure 2 is an exemplary view showing an LNG carrier equipped with a conventional cylindrical insertion LNG storage tank,

도 3 은 종래의 원통삽입 LNG 저장탱크의 용량을 증대시킨 구조를 나타낸 예시도,3 is an exemplary view showing a structure of increasing the capacity of a conventional cylindrical insert LNG storage tank,

도 4 는 본 발명에 있어 곡률반경을 조절하여 LNG 저장탱크의 저장용량을 증대시킨 상태를 나타낸 예시도,Figure 4 is an exemplary view showing a state in which the storage capacity of the LNG storage tank is increased by adjusting the radius of curvature in the present invention,

도 5 는 본 발명의 실시예에 의한 LNG 저장탱크의 확장 구조를 나타낸 예시도,5 is an exemplary view showing an expansion structure of an LNG storage tank according to an embodiment of the present invention;

도 6 은 본 발명의 다른 실시예에 의한 LNG 저장탱크의 확장 구조를 나타낸 예시도.Figure 6 is an exemplary view showing an expansion structure of the LNG storage tank according to another embodiment of the present invention.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

(9) : 구형 LNG 저장탱크 (10) : 연장 구형 LNG 저장탱크(9): old LNG storage tank (10): extended old LNG storage tank

(11) : 원통 삽입 LNG 저장탱크(11): cylindrical insert LNG storage tank

(20) : 상부탱크부(20): upper tank part

(30) : 하부탱크부 (40) : 연결부(30): lower tank portion 40: connection portion

(50): 지지부 (100) : LNG 운반선50: support portion 100: LNG carrier

(101) : 선박조종실 (102) : 가시거리(101): ship control room (102): line of sight

(103) ; 조종시선103; Maneuver

본 발명은 연장 구형 LNG 저장탱크의 구조에 관한 것으로, 보다 상세하게는 LNG 저장탱크의 중간에 상부탱크부 및 하부탱크부의 곡률보다 상대적으로 완만한 연결부를 삽입 용접하여 LNG 저장용량을 증대시키는 한편 상,하부탱크부와의 연결부위에 응력집중을 완화하는 연장 구형 LNG 저장탱크의 구조에 관한 것이다.The present invention relates to a structure of an extended spherical LNG storage tank, and more particularly, inserting and welding a relatively gentle connection portion of the upper tank portion and the lower tank portion in the middle of the LNG storage tank to increase LNG storage capacity. The present invention relates to a structure of an extended spherical LNG storage tank that relieves stress concentration at a connection part with a lower tank part.

통상적으로 LNG 운반선(100)에 탑재되는 구형 LNG 저장탱크(9)는 동일한 크기를 가지며, 도 1에 도시된 바와 같이 LNG 운반선(100)의 안전항해를 위하여 요구되는 선수 쪽 최소 가시거리(102)를 확보하기 위한 선박의 조종시선(103)은 선박 조종실(101) 높이와 선수 쪽 구형 LNG 저장탱크(9) 높이에 의하여 결정되고 있다.Typically, the old LNG storage tank 9 mounted on the LNG carrier 100 has the same size, and as shown in FIG. 1, the minimum visible distance 102 of the bow side required for safe navigation of the LNG carrier 100. The ship's steering line 103 for securing the ship is determined by the height of the ship's cockpit 101 and the bow-side spherical LNG storage tank 9.

그러나 도 1에 나타낸 바와 같이 LNG 운반선(100)의 가시거리(102)는 선박 조종실(101) 높이와 선수에 설치된 구형 LNG 저장탱크(9) 높이에 의하여 결정되므로 뒤쪽에 있는 구형 LNG 저장탱크(9)는 조종시선(103) 높이까지 더욱 높게 확장할 수 있다.However, as shown in FIG. 1, the visible distance 102 of the LNG carrier 100 is determined by the height of the ship cockpit 101 and the height of the old LNG storage tank 9 installed at the bow, so that the old LNG storage tank 9 at the rear is provided. ) May extend higher to the height of the steering line 103.

이로써 도 2 에서와 같이 선수에 설치되어 있는 구형 LNG 저장탱크(9)의 후방에 위치한 LNG 저장탱크는 조종시선(103) 높이까지 확장할 수 있다. 즉, 선수에 설치되어 있는 LNG 저장탱크의 후방으로 높이 방향으로 확장된 원통 삽입 LNG 저장탱크(11)를 배치하여 선박의 조종시선(103)까지 점차적으로 높게 배치할 경우, 선박의 크기 변화 없이 구형 LNG 저장탱크(9)를 배치한 LNG 운반선보다 LNG 저장용량을 크게 증대시킬 수 있다. As a result, as shown in FIG. 2, the LNG storage tank located behind the spherical LNG storage tank 9 installed in the bow can be extended to the height of the steering line 103. That is, when placing the cylindrical insertion LNG storage tank 11 extended in the height direction to the rear of the LNG storage tank installed in the bow and gradually placed up to the steering line 103 of the ship, the spherical shape without changing the size of the vessel The LNG storage capacity can be greatly increased than the LNG carrier in which the LNG storage tank 9 is disposed.

도 3 은 종래의 원통을 삽입하여 LNG 저장탱크의 용량을 증대시킨 구조를 나타낸 예시도로서, 원통 삽입 LNG 저장탱크(11)는 동일한 곡률 반경을 가지는 반구형의 상부탱크부(20) 및 하부탱크부(30)와, 상기 상부탱크부(20) 및 하부탱크부(30)를 연결하도록 설치되어 LNG 저장용량이 증대되도록 하는 원통형태의 원통 삽입부(41)와, 상기 원통 삽입부(41)의 둘레를 따라 설치되고 선체에 연결되어 원통 삽입 LNG 저장탱크(11)를 지지해주는 지지부(50)로 구성된다.3 is an exemplary view showing a structure in which a capacity of an LNG storage tank is increased by inserting a conventional cylinder, and the cylindrical insertion LNG storage tank 11 has a hemispherical upper tank portion 20 and a lower tank portion having the same radius of curvature. 30 and the cylindrical insert 41 of the cylindrical shape is installed to connect the upper tank 20 and the lower tank 30 to increase the LNG storage capacity, and the cylindrical insert 41 It is installed along the circumference and is connected to the hull is composed of a support 50 for supporting the cylindrical insertion LNG storage tank (11).

이와 같이 형성되는 원통 삽입 LNG 저장탱크(11)는 반구형의 상부탱크부(20)와 하부탱크부(30)가 동일한 곡률반경을 가지는 것으로, 원통 삽입부(41)와 이에 용접되는 상부탱크부(20) 및 하부탱크부(30)의 곡률부위에 응력집중 현상이 발생되는 문제점이 있다.The cylindrical insertion LNG storage tank 11 formed as described above has a hemispherical upper tank portion 20 and a lower tank portion 30 having the same radius of curvature, and the cylindrical insertion portion 41 and the upper tank portion welded thereto ( 20) and a stress concentration phenomenon occurs in the curvature of the lower tank portion 30.

본 발명은 상기와 같은 종래의 문제점을 해결하기 위하여 창출되는 것으로, LNG 운반선에 탑재되는 LNG 저장탱크의 연결부와 상,하부탱크부의 이음부를 완만하게 형성하여, LNG 저장탱크의 저장용량을 증대시켜주는 한편, 이음부에 가해지는 응력집중현상을 완화시켜주는 연장 구형 LNG 저장탱크의 구조를 제공함에 있다.The present invention is created in order to solve the above-mentioned conventional problems, by gently forming a joint portion of the LNG storage tank and the upper and lower tanks mounted on the LNG carrier, thereby increasing the storage capacity of the LNG storage tank. On the other hand, it is to provide a structure of an extended spherical LNG storage tank that mitigates the stress concentration applied to the joint.

상기 목적을 달성하기 위한 본 발명은, 곡률반경 R을 가지는 상부탱크부 및 하부탱크부와, 상기 상부탱크부와 하부탱크부의 사이에 설치되어 LNG 저장용량이 확대되도록 하는 연결부로 이루어진 LNG 저장탱크의 구조에 있어서, 상기 연결부는 연결부의 중심점을 폭방향으로 가로지르는 중심라인 상의 임의의 점으로부터 상기 상부탱크부 및 상기 하부탱크부의 곡률중심점을 지나 연장되어 상부탱크부 및 하부탱크부의 원호와의 교차점을 시작점과 끝점으로 하며, 상기 임의의 점으로부터 상기 교차점까지의 거리를 곡률반경 R1으로 하는 원호에 의해 형성되는 것을 특징으로 한다.The present invention for achieving the above object, of the LNG storage tank consisting of an upper tank portion and a lower tank portion having a radius of curvature R and a connecting portion installed between the upper tank portion and the lower tank portion to expand the LNG storage capacity In the structure, the connecting portion extends beyond the center of curvature of the upper tank portion and the lower tank portion from an arbitrary point on the center line that crosses the center point of the connecting portion in the width direction to intersect the intersection with the arc of the upper tank portion and the lower tank portion. and the start and end points, characterized in that formed from the arbitrary point by a circular arc of the distance to the intersection to the radius of curvature R 1.

또한, 상기 시작점 및 끝점에서의 연결부와 상,하부탱크부의 접선의 기울기는 서로 동일한 것을 특징으로 한다.In addition, the inclination of the tangential of the connecting portion and the upper and lower tanks at the start point and the end point is the same.

즉, 연결부의 곡률 반경이 상하부 탱크의 곡면보다 크도록 하여 상하부 탱크 구면이 연결부 내부에 접할 수 있도록 하고 접하는 부위를 연결 위치로 하여, 연결 위치에서의 연결부에 대한 접선의 기울기와 연결 위치에서의 상하부 탱크 구면의 접선의 기울기가 일치하는 것을 특징으로 하고 있다. That is, the radius of curvature of the connecting portion is larger than the curved surface of the upper and lower tanks so that the upper and lower tank spheres can contact the inside of the connecting portion, and the contacting portion is the connecting position, the inclination of the tangent to the connecting portion at the connecting position and the upper and lower portions at the connecting position. It is characterized by the inclination of the tangent of the tank spherical surface.

한편 본 발명은 곡률반경 R을 가지는 상부탱크부 및 하부탱크부와, 상기 상부탱크부와 하부탱크부의 사이에 설치되어 LNG 저장용량이 확대되도록 하는 연결부로 이루어진 LNG 저장탱크의 구조에 있어서, 상기 연결부는 상부탱크부의 원호상에 위치한 임의의 한점을 시작점으로 하고, 상기 하부탱크부의 원호상에 위치하되, 상기 시작점과 대칭되는 위치에 있는 한 점을 끝점으로 하는 포물선에 의해 형성되되, 상기 시작점 및 끝점에서의 포물선에 대한 접선의 기울기가 동일 위치에서의 상부탱크부 및 하부탱크부에 대한 접선의 기울기와 동일한 포물선에 의해 형성되는 것을 특징으로 한다.Meanwhile, the present invention provides a structure of an LNG storage tank including an upper tank portion and a lower tank portion having a radius of curvature R, and a connection portion installed between the upper tank portion and the lower tank portion to expand an LNG storage capacity. Is a starting point at any one point on the arc of the upper tank portion, is formed by a parabola which is located on the arc of the lower tank portion, the end point is a point in a position symmetrical to the starting point, the starting point and the end point The inclination of the tangent line with respect to the parabola at is formed by the same parabola as the slope of the tangent line with respect to the upper tank portion and the lower tank portion at the same position.

이하 본 발명의 실시예인 그 구성과 작용을 첨부도면에 연계시켜 상세히 설명하면 다음과 같다.Hereinafter, the configuration and operation of the embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 4 는 본 발명에 있어 연결부 곡률반경을 조절하여 LNG 저장탱크의 저장용량을 증대시킨 상태를 나타낸 예시도, 도 5 는 본 발명의 실시예에 의한 LNG 저장탱크의 확장 구조를 나타낸 예시도로서,Figure 4 is an exemplary view showing a state in which the storage capacity of the LNG storage tank is increased by adjusting the radius of curvature of the connection portion, Figure 5 is an exemplary view showing an expansion structure of the LNG storage tank according to an embodiment of the present invention,

실시예에 의한 본 발명의 연장 구형 LNG 저장탱크(10)는 도 5 에서와 같이 점 O, O'를 중심으로 반경이 R인 원호를 형성하는 상부탱크부(20) 및 하부탱크부(30)와, 상기 반경 R보다 큰 반경 R1을 가지는 원호로서 상부탱크부(20)의 구면 외부에 상단이 용접 연결되고 상기 하부탱크부(30)의 구면 외부에 하단이 용접 연결되는 연결부(40)로 구성된다.The extended spherical LNG storage tank 10 of the present invention according to the embodiment has an upper tank portion 20 and a lower tank portion 30 forming an arc having a radius R about points O and O 'as shown in FIG. 5. And, as a circular arc having a radius R 1 larger than the radius R to the upper end of the spherical surface of the upper tank portion 20 is welded to the connection portion 40 is connected to the lower end of the spherical surface of the lower tank 30 It is composed.

이때 상기 연결부(40)는 상부탱크부(20)와의 접점 E에서 연결부(40) 끝점의 기울기가 상기 접점 E에서의 상부탱크부(20) 원호의 기울기와 같은 원호로써 완만하게 형성되어, 상기 하부탱크부(30)와의 접점 G 까지 연결되는 것이다. At this time, the connection portion 40 is formed in a smooth circular arc of the same as the slope of the circular arc of the upper tank portion 20 at the contact point E in the contact point E with the upper tank portion 20, the lower It is connected to the contact point G with the tank unit 30.

즉 상기 접점 E에서 상부탱크부(20) 원호의 접선의 기울기(45)와 연결부(40)의 접선의 기울기(45)가 동일하고, 상기 접점 G에서 하부탱크부(30) 원호의 접선의 기울기(45)와 연결부(40) 접선의 기울기(45)가 동일하다.That is, the inclination 45 of the tangent of the upper tank portion 20 circular arc at the contact point E is the same as the inclination 45 of the tangent line of the connecting portion 40, and the slope of the tangent of the circular arc of the lower tank part 30 at the contact point G is the same. The inclination 45 of the tangent of 45 and the connection part 40 is the same.

따라서 상기 연결부(40)는 E점을 시작점으로 하고 G점을 끝점으로 하여 반경R1에 의해 형성되는 원호인 것이다.Therefore, the connecting portion 40 is an arc formed by the radius R 1 with the E point as the starting point and the G point as the end point.

한편 상기 연결부(40)의 반경 R1은 연결부(40)의 중심점을 폭방향으로 가로지르는 중심라인인 선분AB의 어느 한 지점 J에서 상기 상부탱크부(20)의 원호의 중심점 O를 지나 상부탱크부(20)의 원호, 즉 접점 E 점까지 연장되는 것으로, 연결부(40)의 반경R1은 선분JE인 것이다.On the other hand, the radius R 1 of the connecting portion 40 passes through the center point O of the arc of the upper tank portion 20 at any point J of the line segment AB, which is the center line crossing the center point of the connecting portion 40 in the width direction, and the upper tank. It extends to the arc of the part 20, ie, the point of contact E, and the radius R 1 of the connection part 40 is a line segment JE.

또한 상기 하부탱크부(30)와의 접점 G 는 상기 접점 E점과 연결부(40)의 중심라인인 선분 AB를 기준으로 상하대칭인 지점에 위치함으로써, 상기 하부탱크부(30)와 연결부(40)는 접점 G상에서 접선 기울기(45)가 동일하다.In addition, the contact point G with the lower tank part 30 is located at the point of the upper and lower symmetry with respect to the contact point E and the line segment AB which is the center line of the connecting part 40, the lower tank part 30 and the connecting part 40 The tangent slope 45 is the same on the contact G.

한편 접점 F는 LNG 저장탱크(10)의 중심축인 선분 CD를 기준으로 접점 E의 좌우대칭 점이며, 접점 H는 연결부(40)의 폭방향 중심라인인 선분 AB를 중심으로 접점 F의 상하대칭점이다.On the other hand, the contact point F is the left and right symmetry point of the contact point E based on the line segment CD, which is the central axis of the LNG storage tank 10, and the contact point H is the upper and lower symmetry point point of the contact point F, centering on the line segment AB of the width direction center line of the connecting portion 40. to be.

결국 연장 구형 LNG 저장탱크(10)의 상부탱크부(20)는 원호EF(곡률반경 R)이고, 하부탱크부(30)는 원호 GH(곡률반경R) 이며, 연결부(40)는 원호EG(곡률반경 R1) 및 원호 FH(곡률반경 R1)이며, 연장 구형 LNG 저장탱크(10)는 상기 원호들의 상호결합으로 구성된다.As a result, the upper tank part 20 of the extended spherical LNG storage tank 10 is arc EF (curvature radius R), the lower tank part 30 is arc GH (curvature radius R), and the connection part 40 is arc EG ( Curvature radius R 1 ) and arc FH (curvature radius R 1 ), the extension spherical LNG storage tank 10 is composed of the mutual coupling of the arcs.

아울러 두 원호가 만나는 점E, F, H, G에서 두 원호는 접선의 기울기는 같다.In addition, at the points E, F, H, and G where the two arcs meet, the tangents have the same slope.

한편 상기 연결부(40)는 도 6 에서와 같이 상부탱크부(20)의 원호상에 위치한 임의의 한점 S를 시작점으로 하고, 상기 시작점 S와 대칭되는 위치에 있는 하부탱크부(30)의 원호상의 한 점 U를 끝점으로 하는 포물선에 의해 형성된다.Meanwhile, as shown in FIG. 6, the connecting portion 40 has an arbitrary point S positioned on the arc of the upper tank portion 20 as a starting point, and has an arc shape of the lower tank portion 30 at a position symmetrical with the starting point S. It is formed by a parabola whose end point is U.

이는 연결부(40)가 2차방정식에 의한 포물선으로 나타나기 때문이며, 이때 상기 시작점S 및 끝점U 에서의 포물선에 대한 접선의 기울기(45)는 동일 위치에서의 상부탱크부(20) 및 하부탱크부(30)에 대한 접선의 기울기(45)와 동일하게 형성되며 이 포물선의 중심선은 선분 AB 이다.This is because the connecting portion 40 is represented as a parabola by the quadratic equation, wherein the inclination 45 of the tangent line with respect to the parabola at the starting point S and the end point U is the upper tank portion 20 and the lower tank portion ( It is formed equal to the slope 45 of the tangent to 30) and the centerline of this parabola is line segment AB.

상기와 같은 실시예에서 원호 및 포물선과 상부탱크부 및 하부탱크부와 만나는 점의 접선의 기울기(45)가 서로 동일함으로써 연결부(40)가 상부탱크부(20) 및 하부탱크부(30)에 완만하게 연결되어 LNG 저장탱크의 저장용량을 증대시키고, 연결 부(40)의 응력집중을 완화하여 LNG 저장탱크의 안전성을 높여주게 되는 것이다.In the above embodiment, the inclination 45 of the tangent of the arc and the parabola and the point where the upper tank portion and the lower tank portion meet each other is the same so that the connection portion 40 is connected to the upper tank portion 20 and the lower tank portion 30. Slowly connected to increase the storage capacity of the LNG storage tank, and to reduce the stress concentration of the connection portion 40 will increase the safety of the LNG storage tank.

또한 연장 구형 LNG 저장탱크(10)를 선체에 고정해주는 지지부(50)는 LNG 저장탱크(10)를 안전하게 지지할 수 있도록 연결부(40)상에 설치하여 선체에 고정시키는 것이 바람직하다.In addition, the support unit 50 for fixing the extended spherical LNG storage tank 10 to the hull is preferably installed on the connecting portion 40 to secure the LNG storage tank 10 to be fixed to the hull.

상기와 같은 구성 및 작용에 의해 기대할 수 있는 본 발명의 효과는, LNG 저장탱크의 연결부를 확장하여 저장탱크의 용량을 증대시킴과 더불어 상,하부탱크부와 연결부가 용접결합되는 이음부의 접선의 기울기가 동일하게 연결됨으로써, 이음부가 완만한 곡률로 이루어지게 되며 LNG 저장탱크의 자중과 액체 화물에 의한 용접이음부의 응력집중을 완화할 수 있는 매우 유용한 발명이다. The effect of the present invention can be expected by the configuration and action as described above, the expansion of the connection portion of the LNG storage tank to increase the capacity of the storage tank and the slope of the tangential of the joint portion welded joints of the upper and lower tank portion By the same connection, the joint is made of a gentle curvature and is a very useful invention that can alleviate the stress concentration of the weld joint by the self-weight and liquid cargo of the LNG storage tank.

Claims (2)

곡률반경 R을 가지는 상부탱크부 및 하부탱크부와, 상기 상부탱크부와 하부탱크부의 사이에 설치되어 LNG 저장용량이 확대되도록 하는 연결부로 이루어진 LNG 저장탱크의 구조에 있어서, In the structure of the LNG storage tank consisting of an upper tank portion and a lower tank portion having a radius of curvature R and a connecting portion provided between the upper tank portion and the lower tank portion to expand the LNG storage capacity, 상기 연결부는 연결부의 중심점을 폭방향으로 가로지르는 중심라인 상의 임의의 점으로부터 상기 상부탱크부 및 상기 하부탱크부의 곡률중심점을 지나 연장되어 상부탱크부 및 하부탱크부의 원호와의 교차점을 시작점과 끝점으로 하며, 상기 임의의 점으로부터 상기 교차점까지의 거리를 곡률반경 R1으로 하는 원호에 의해 형성되는 것을 특징으로 하는 연장 구형 LNG 저장탱크의 구조.The connecting portion extends from an arbitrary point on the center line crossing the center point of the connecting part in the width direction beyond the center of curvature of the upper tank part and the lower tank part so that the intersection point between the arcs of the upper tank part and the lower tank part is the starting point and the end point. And a circular arc having a radius of curvature R 1 from the arbitrary point to the intersection point. 곡률반경 R을 가지는 상부탱크부 및 하부탱크부와, 상기 상부탱크부와 하부탱크부의 사이에 설치되어 LNG 저장용량이 확대되도록 하는 연결부로 이루어진 LNG 저장탱크의 구조에 있어서, In the structure of the LNG storage tank consisting of an upper tank portion and a lower tank portion having a radius of curvature R and a connecting portion provided between the upper tank portion and the lower tank portion to expand the LNG storage capacity, 상기 연결부는 상부탱크부의 원호상에 위치한 임의의 한점을 시작점으로 하고, 상기 하부탱크부의 원호상에 위치하되 상기 시작점과 대칭되는 위치에 있는 한 점을 끝점으로 하는 포물선에 의해 형성되되, 상기 시작점 및 끝점에서의 포물선에 대한 접선의 기울기가 동일 위치에서의 상부탱크부 및 하부탱크부에 대한 접선의 기울기와 동일한 포물선에 의해 형성되는 것을 특징으로 하는 연장구형 LNG 저장탱크의 구조.The connecting portion is formed by a parabola having a starting point at an arbitrary point located on the arc of the upper tank part and positioned at an arc of the lower tank part and symmetrical with the starting point. An extension type LNG storage tank structure, characterized in that the inclination of the tangent to the parabola at the end point is formed by the same parabola as the inclination of the tangent to the upper tank portion and the lower tank portion at the same position.
KR1020060050523A 2006-06-05 2006-06-05 Structure of Extended Spherical LUN Storage Tank Expired - Fee Related KR100751696B1 (en)

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KR1020060050523A KR100751696B1 (en) 2006-06-05 2006-06-05 Structure of Extended Spherical LUN Storage Tank
CN2007800229201A CN101473162B (en) 2006-06-05 2007-02-21 Expanded spherical liquefied natural gas storage tank and manufacturing method thereof
PCT/KR2007/000890 WO2007142400A1 (en) 2006-06-05 2007-02-21 Extended spherical lng storage tank and method for manufacturing the same
JP2009514188A JP2009540233A (en) 2006-06-05 2007-02-21 Extended spherical LNG storage tank and manufacturing method thereof
NO20085116A NO335482B1 (en) 2006-06-05 2008-12-08 Expanded, spherical LNG storage tank, as well as process for making the same
JP2012181870A JP5603906B2 (en) 2006-06-05 2012-08-20 Extended spherical LNG storage tank

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JP2015217749A (en) * 2014-05-15 2015-12-07 川崎重工業株式会社 Hull support structure for liquefied gas tank and liquefied gas carrier
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