KR20120077759A - Vessel for aluminum lng storage tank welding method - Google Patents

Vessel for aluminum lng storage tank welding method Download PDF

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KR20120077759A
KR20120077759A KR1020100139834A KR20100139834A KR20120077759A KR 20120077759 A KR20120077759 A KR 20120077759A KR 1020100139834 A KR1020100139834 A KR 1020100139834A KR 20100139834 A KR20100139834 A KR 20100139834A KR 20120077759 A KR20120077759 A KR 20120077759A
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South Korea
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welding
reinforcement
horizontal
storage tank
pieces
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KR1020100139834A
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Korean (ko)
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성희준
권봉재
박인완
김경주
신상룡
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현대중공업 주식회사
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Priority to KR1020100139834A priority Critical patent/KR20120077759A/en
Publication of KR20120077759A publication Critical patent/KR20120077759A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
    • 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
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B3/00—Hulls characterised by their structure or component parts
    • B63B3/14—Hull parts
    • B63B3/56—Bulkheads; Bulkhead reinforcements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/02—Honeycomb structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/08—Non-ferrous metals or alloys
    • B23K2103/10—Aluminium or alloys thereof

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

Abstract

PURPOSE: A method for welding a stiffener in an aluminum LNG(Liquefied Natural Gas) storage tank for a ship is provided to enable flat welding by forming a T-shaped lattice stiffener first. CONSTITUTION: A method for welding a stiffener in an aluminum LNG storage tank for a ship comprises the steps of: forming horizontal stiffeners(20) by welding vertical pieces to horizontal pieces, arranging the transverse stiffeners at regular intervals with the horizontal pieces located at the bottom, arranging and welding longitudinal horizontal pieces(30) between the transverse stiffeners at the right angle to the horizontal pieces, welding longitudinal pieces to the top of the horizontal pieces to form a lattice stiffener, and welding the lattice stiffener to a panel(10) with the horizontal pieces facing upward.

Description

선박용 알루미늄 ＬＮＧ 저장 탱크 보강재 용접방법{vessel for Aluminum LNG storage tank welding method}Vessel for Aluminum LNG storage tank welding method

본 발명은 선박용 알루미늄 ＬＮＧ 저장 탱크 보강재 용접방법에 관한 것으로서, 더욱 상세하게는 LNG 저장 탱크 내부를 지지할 수 있는 보강재를 다양한 형태로 설치함으로써 단면적 및 단면계수를 크게 증가시켜 인장과 굽힘에 따른 응력을 감소시킬 수 있을 뿐만 아니라 보강재 각각의 용접시 용접 편의성을 극대화시킨 선박용 알루미늄 ＬＮＧ 저장 탱크 보강재 용접방법에 관한 것이다.
The present invention relates to a method for welding aluminum tank storage tank reinforcement for ships, and more specifically, by installing a reinforcement that can support the inside of the LNG storage tank in various forms to significantly increase the cross-sectional area and cross-sectional coefficient to increase the stress due to tension and bending The present invention relates to a method for welding a marine aluminum tank storage tank reinforcement that can be reduced as well as maximizes the ease of welding during welding of each reinforcement.

일반적으로 LNG 운전용 선박은 LNG를 저장하는 탱크를 선박에 수용시켜 운반하는 구조이다.In general, a ship for LNG operation has a structure in which a tank for storing LNG is accommodated in a ship and transported.

이러한 LNG 저장 탱크를 종류별로 보면 다음과 같다.The LNG storage tanks are as follows.

구형 LNG 저장 탱크는 선박의 내부에서 스커트가 구형 외부를 지지하는 형태로 온도에 따른 탱크 팽창 및 수축에 의해 응력이 크게 발생하지 않아 내부 보강이 불필요하다. 그러나 구 형태를 하고 있어 불필요한 공간이 많이 발생하여 탱크를 대형화하는데는 불리하며 선박 상부구조를 활용할 수 없는 단점이 있다.In the old LNG storage tank, the skirt is supported by the inside of the ship in the form of the sphere, the stress is not generated largely by the expansion and contraction of the tank according to the temperature, so internal reinforcement is unnecessary. However, since it has a spherical shape, a lot of unnecessary space is generated, which is disadvantageous in increasing the size of the tank, and there is a disadvantage in that the upper structure of the ship cannot be utilized.

멤브레인형 저장 탱크는 선박의 선체와 저장 탱크가 일체화된 구조를 하고 있어 별도의 보강 구조물이 불필요하다. 그러나 온도에 따른 탱크 팽창 및 수축에 대응하기 의해 저장 탱크 내부에 파형(corrugation) 구조물을 형성해야 하므로 별도의 작업에 의해 제작 공정시간이 구형 저장 탱크에 비해 오래 걸리고 그에 따라 비용 또한 상승하는 단점이 있다.Membrane type storage tank has a structure in which the hull of the ship and the storage tank are integrated, so that no additional reinforcement structure is required. However, since the corrugation structure must be formed inside the storage tank to cope with the expansion and contraction of the temperature according to the temperature, the manufacturing process takes longer than that of the old storage tank by the separate work and the cost increases accordingly. .

IHI SPB형 저장 탱크는 LPG 선박과 유사하게 탱크 내부 상하부를 초크(chock)로 지지하는 구조로 온도에 따른 팽창 및 수축에 의해 응력이 크게 발생하므로 내부에 보강이 많이 필요한 구조이다. 그러나 저장 공간을 크게 형성시킬 수 있어 대형화에 유리하며 선박 상부구조를 활용할 수 있다.Similar to LPG vessels, IHI SPB-type storage tanks support the upper and lower parts of the tanks with a choke, and stress is largely generated by expansion and contraction according to temperature. However, it is possible to form a large storage space, which is advantageous for the enlargement and can utilize the vessel superstructure.

원통형(Cylindrical) 또는 다축 연장구형 저장 탱크는 탱크 팽창 및 수축에 대응하기 위해 탱크 밀착지지(탄성지지) 시스템을 구비하며, IHI SPB형과 비교하여 탱크 내부 보강을 단순화할 수 있는 장점이 있으며, 탱크 대형화에 유리하고 선박 상부구조의 활용도가 높은 장점이 있다.Cylindrical or multi-axis extended storage tanks have a tank-tight support (elastic support) system to cope with tank expansion and contraction, and have the advantage of simplifying the internal reinforcement of the tank compared to the IHI SPB type. It is advantageous for large size and high utilization of ship superstructure.

상기와 같은 여러 종류의 LNG 저장 탱크들은 구형 저장 탱크를 제외하곤 모두 보강구조물이 설치되야 하므로 보강구조물에 대한 다양한 설계가 이루어지고 있는 실정이다.As described above, various types of LNG storage tanks have various designs for reinforcing structures because all reinforcing structures should be installed except for the old storage tanks.

또한 도 1에 도시된 바와 같이 종래의 저장 탱크는 판재(1)를 마련한 후 상기 판재(1) 위에 우선 가로 방향으로 수직편(2a)을 등간격 용접한 후 용접된 수직편(2a) 위에 수평편(2b)을 용접하여 보강재(2)를 형성한 후 같은 방식으로 세로 방향 보강재(3)를 용접하여 격자 형태의 보강재를 형성하고 이를 이용해 저장 탱크(T)를 형성하였다.In addition, as shown in FIG. 1, the conventional storage tank is provided with a plate 1, and then horizontally welds the vertical pieces 2a in the horizontal direction on the plate 1 first and then horizontally on the welded vertical pieces 2a. After welding the piece 2b to form the reinforcing material 2, the longitudinal reinforcing material 3 was welded in the same manner to form a reinforcing material in the form of a lattice to form a storage tank T.

그러나 판재 위에 보강재 용접시 상기와 같은 방법으로 용접할 경우 오버 헤드 자세가 나오므로 용접이 매우 어렵고, 용접 공수 또한 많이 나오는 문제점이 있었다.
However, when welding the reinforcing material on the plate when welding in the same way as the overhead attitude is very difficult to weld, there was a problem that the welding maneuver also comes out a lot.

본 발명은 상기와 같은 문제점을 해결하기 위해 안출된 것으로서, 본 발명의 목적은 LNG 저장 탱크 내부를 지지할 수 있는 보강재를 다양한 형태로 설치함으로써 단면적 및 단면계수를 크게 증가시켜 인장과 굽힘에 따른 응력을 감소시킬 수 있을 뿐만 아니라 보강재 각각의 용접시 용접 편의성을 극대화시킨 선박용 알루미늄 ＬＮＧ 저장 탱크 보강재 용접방법을 제공함에 있다.The present invention has been made to solve the above problems, the object of the present invention is to increase the cross-sectional area and the cross-sectional coefficient by installing a reinforcement that can support the inside of the LNG storage tank in various forms to increase the stress due to tension and bending In addition, the present invention provides a method of welding a reinforcement for marine aluminum tank storage tanks that maximizes the ease of welding during welding of each reinforcement.

본 발명은 앞서 본 목적을 달성하기 위하여 다음과 같은 구성을 가진다.The present invention has the following structure in order to achieve the above object.

본 발명의 선박용 알루미늄 ＬＮＧ 저장 탱크 보강재 용접방법은, 1) 수평편 위에 수직편을 용접하여 가로 방향 보강재를 형성하는 단계; 2) 수평편이 하부에 위치되도록 가로 방향 보강재를 등간격 배치하는 단계; 3) 등간격 배치된 가로 방향 보강재 사이에 수평편과 직교되게 세로 방향 수평편을 등간격 배치 후 상호 용접하는 단계; 4) 상기 수평편 위에 수직편을 용접하여 격자 형태의 보강재를 형성하는 단계; 및 5) 형성된 격자 형태 보강재를 수평편이 상부를 향하도록 한 후 판재에 용접하는 단계;를 포함하여 이루어진다.Marine aluminum tank storage tank reinforcement welding method of the present invention, 1) welding a vertical piece on a horizontal piece to form a transverse reinforcement; 2) arranging the lateral reinforcement at equal intervals such that the horizontal piece is positioned at the bottom; 3) welding the longitudinal horizontal pieces after the equal intervals to be orthogonal to the horizontal pieces between the horizontal reinforcing members arranged at equal intervals and then welding each other; 4) welding a vertical piece on the horizontal piece to form a reinforcement in the form of a lattice; And 5) welding the formed lattice-shaped reinforcement to a plate after the horizontal piece faces upward.

그리고 상기 각각의 보강재는 압축된 T형 알루미늄(AL)인 것이 바람직하다.
And each of the reinforcing material is preferably compressed T-type aluminum (AL).

본 발명에 따르면, LNG 저장 탱크 내부를 지지할 수 있는 보강재를 다양한 형태로 설치함으로써 단면적 및 단면계수를 크게 증가시켜 인장과 굽힘에 따른 응력을 감소시킬 수 있을 뿐만 아니라 보강재 각각의 용접시 용접 편의성을 극대화시키는 효과가 있다.
According to the present invention, by installing the reinforcing material that can support the inside of the LNG storage tank in various forms, it is possible to greatly increase the cross-sectional area and the cross-sectional coefficient to reduce the stress due to tensile and bending, as well as the welding convenience of each reinforcement welding It has the effect of maximizing.

도 1 및 도 2는 종래의 저장 탱크 제조 공정을 나타내는 도면.
도 3 및 도 4는 본 발명의 선박용 알루미늄 ＬＮＧ 저장 탱크 보강재 용접 공정을 나타내는 도면.1 and 2 show a conventional storage tank manufacturing process.
3 and 4 are views showing a welding process for aluminum aluminum tank storage tank reinforcement of the present invention.

이하, 본 발명의 바람직한 실시 예들을 첨부된 도면을 참고하여 더욱 상세히 설명한다. 본 발명의 실시 예들은 여러 가지 형태로 변형될 수 있으며, 본 발명의 범위가 아래에서 설명하는 실시 예들에 한정되는 것으로 해석되어서는 안 된다. 본 실시 예들은 당해 발명이 속하는 기술 분야에서 통상의 지식을 가진 자에게 본 발명을 더욱 상세하게 설명하기 위해서 제공되는 것이다. 따라서 도면에 나타난 각 요소의 형상은 보다 분명한 설명을 강조하기 위하여 과장될 수 있다.
Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. The embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. The embodiments are provided to explain the present invention to a person having ordinary skill in the art to which the present invention belongs. Accordingly, the shape of each element shown in the drawings may be exaggerated to emphasize a more clear description.

도 3 및 도 4에 도시된 바에 의하면, 본 발명의 선박용 알루미늄 ＬＮＧ 저장 탱크 보강재 용접방법은 다음과 같은 공정을 통해 형성된다.As shown in Figures 3 and 4, the method for welding marine aluminum tank storage tank reinforcement of the present invention is formed through the following process.

먼저 1) 단계에서는 압출 방식으로 제작된 T형 보강재 수평편(20b) 위에 수직편(20a)을 용접하여 가로 방향 T형 압출 보강재(20)를 형성한다.First, in the step 1), the vertical piece 20a is welded on the horizontal piece 20b of the T-shaped reinforcement manufactured by the extrusion method to form a horizontal T-shaped extruded reinforcement 20.

다음으로 2) 단계에서는 수평편(20b)이 하부에 위치되도록 가로 방향 보강재를 등간격 배치시킨다. 이 단계에서는 하나의 수평편과 하나의 수직편만을 설명하나 가로 방향 T형 압출 보강재가 등간격 배치되므로 일정한 간격을 유지하기 위해 보강재와 보강재 사이 별도의 간격 유지 수단을 설치 후 수직편과 수평편을 용접하는 것이 바람직하다.Next, in step 2), the horizontal reinforcement is disposed at equal intervals so that the horizontal piece 20b is positioned below. In this step, only one horizontal piece and one vertical piece are described, but since the horizontal T-shaped extruded reinforcement is arranged at equal intervals, the vertical piece and the horizontal piece are separated after the installation of separate means for maintaining the gap between the reinforcement and the reinforcement to maintain a constant gap. It is preferable to weld.

다음으로 3) 단계에서는 등간격 배치된 가로 방향 보강재(20) 사이에 세로 방향 보강재(30)의 수평편을 수평편과 직교되게 등간격 배치 후 가로 방향 T형 압출 보강재의 수평편과 세로 방향 T형 압출 보강재의 수평편을 상호 용접한다.Next, in step 3), the horizontal pieces of the longitudinal reinforcement material 30 are equally spaced at right angles to the horizontal pieces between the horizontal reinforcement materials 20 arranged at equal intervals, and then the horizontal pieces of the horizontal T-shaped extruded reinforcement material and the vertical direction T are The horizontal pieces of the mold extrusion reinforcement are welded together.

다음으로 4) 단계에서는 세로 방향 보강재(30)의 수평편 위에 수직편을 등간격 배치한 후 수평과 수직편을 용접하여 가로 방향 T형 압출 보강재와 세로 방향 T형 압출 보강재 각각의 수직편이 상부로 향하는 격자 형태의 보강재를 형성한다.Next, in step 4), the vertical pieces are placed at equal intervals on the horizontal pieces of the longitudinal reinforcement 30, and then the horizontal and vertical pieces are welded to each other so that the vertical pieces of the horizontal T-shaped extruded reinforcement and the vertical T-shaped extruded reinforcement are moved upward. Form a reinforcement in the form of a facing grating.

다음으로 5) 단계에서는 격자 형태로 형성된 보강재를 수평편이 상부를 향하도록 뒤집어서 가로 방향 보강재(20)의 수직편과 세로 방향 보강재(30)의 수직편를 판재(10)에 용접한다.Next, in step 5), the reinforcement formed in the shape of a lattice is inverted so that the horizontal piece faces upward, and the vertical piece of the horizontal reinforcement 20 and the vertical piece of the longitudinal reinforcement 30 are welded to the plate 10.

여기서 상기 보강재 및 판재는 알루미늄(AL)인 것이 바람직하다.In this case, the reinforcing material and the plate is preferably aluminum (AL).

또한 알루미늄 용접 방식으로는 용접전원은 순수한 AC를 사용하는 방법과 AC/DC 복합기능을 이용하는 TIG 용접 방식과 MIG 용접 방식을 선택적으로 이용할 수 있다.In addition, as a welding method for welding aluminum, pure AC can be used, and a TIG welding method using a combination of AC / DC and MIG welding methods can be selectively used.

이와 같이 "T"자 형태의 격자 무늬 보강재를 먼저 형성시키기 되면 "T"자 형태 용접시 아래 보기 용접이 가능하여 작업자의 작업 효율을 증가시킬 수 있을 뿐만 아니라 종래에 비해 작업 공정을 단축시킬 수 있어 공정 수율을 향상시킬 수 있게 된다.Thus, if the "T" shaped plaid reinforcement is formed first, it is possible to weld the bottom view during the "T" shaped welding, which not only increases work efficiency of the worker but also shortens the working process compared with the conventional method. The process yield can be improved.

본 발명은 상기에 기술된 실시예들에 의해 한정되지 않고, 당업자들에 의해 다양한 변형 및 변경을 가져올 수 있으며, 이는 첨부된 청구항에서 정의되는 본 발명의 취지와 범위에 포함된다.The present invention is not limited by the embodiments described above, and various changes and modifications can be made by those skilled in the art, which are included in the spirit and scope of the present invention as defined in the appended claims.

Claims (2)

1) 수평편 위에 수직편을 용접하여 가로 방향 보강재를 형성하는 단계;
2) 수평편이 하부에 위치되도록 가로 방향 보강재를 등간격 배치하는 단계;
3) 등간격 배치된 가로 방향 보강재 사이에 수평편과 직교되게 세로 방향 수평편을 등간격 배치 후 상호 용접하는 단계;
4) 상기 수평편 위에 수직편을 용접하여 격자 형태의 보강재를 형성하는 단계; 및
5) 형성된 격자 형태 보강재를 수평편이 상부를 향하도록 한 후 판재에 용접하는 단계;를 포함하여 이루어지는 것을 특징으로 하는 선박용 알루미늄 ＬＮＧ 저장 탱크 보강재 용접방법.
1) welding a vertical piece on the horizontal piece to form a transverse reinforcement;
2) arranging the lateral reinforcement at equal intervals such that the horizontal piece is positioned at the bottom;
3) welding the longitudinal horizontal pieces after the equal intervals to be orthogonal to the horizontal pieces between the horizontal reinforcing members arranged at equal intervals and then welding each other;
4) welding a vertical piece on the horizontal piece to form a reinforcement in the form of a lattice; And
5) welding the formed lattice-shaped reinforcement to the plate after the horizontal piece is directed to the upper; marine aluminum tank storage tank reinforcement welding method comprising a.
제 1 항에 있어서,
상기 각각의 보강재는 압축된 T형 알루미늄(AL)인 것을 특징으로 선박용 알루미늄 ＬＮＧ 저장 탱크 보강재 용접방법.The method of claim 1,
Said each reinforcement is compressed T-shaped aluminum (AL), characterized in that the marine aluminum tank storage tank reinforcement welding method.
KR1020100139834A 2010-12-31 2010-12-31 Vessel for aluminum lng storage tank welding method KR20120077759A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103707998A (en) * 2014-01-06 2014-04-09 大连理工大学 Damping type oscillation prevention cabin wall for independent C-type cargo hold of LNG injection ship
CN113423988A (en) * 2019-02-14 2021-09-21 气体运输技术公司 Insulating block for thermally insulating a storage tank

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103707998A (en) * 2014-01-06 2014-04-09 大连理工大学 Damping type oscillation prevention cabin wall for independent C-type cargo hold of LNG injection ship
CN113423988A (en) * 2019-02-14 2021-09-21 气体运输技术公司 Insulating block for thermally insulating a storage tank
CN113423988B (en) * 2019-02-14 2023-02-17 气体运输技术公司 Insulating block for thermally insulating a storage tank

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