KR20080049419A - Bonding method with explosive welding for barrier metals of the lng tank - Google Patents

Bonding method with explosive welding for barrier metals of the lng tank Download PDF

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Publication number
KR20080049419A
KR20080049419A KR1020060119939A KR20060119939A KR20080049419A KR 20080049419 A KR20080049419 A KR 20080049419A KR 1020060119939 A KR1020060119939 A KR 1020060119939A KR 20060119939 A KR20060119939 A KR 20060119939A KR 20080049419 A KR20080049419 A KR 20080049419A
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South Korea
Prior art keywords
welding
wall
sealing wall
installing
primary
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KR1020060119939A
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Korean (ko)
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문승환
김병만
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현대중공업 주식회사
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Priority to KR1020060119939A priority Critical patent/KR20080049419A/en
Publication of KR20080049419A publication Critical patent/KR20080049419A/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
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/06—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of high energy impulses, e.g. magnetic energy
    • B23K20/08—Explosive welding
    • 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
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/22—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded
    • 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
    • F17C13/001—Thermal insulation specially adapted for cryogenic vessels

Abstract

A method for bonding sealing walls of an LNG(Liquefied Natural Gas) storage tank by explosive welding is provided to promptly perform a welding operation, reduce the welding process, effectively prevent leakage of cryogenic liquefied natural gas, easily weld parts such as wall faces and ceiling portions that have not been welded easily by existing welding methods, and prevent safety accidents from generating accordingly. A method for bonding sealing walls of an LNG storage tank by explosive welding comprises the steps of: installing a second insulation wall(20) of an insulation system and installing a second sealing wall(60) on a surface of the second insulation wall; installing welding plates(50) on joints(61) of the installed second sealing wall, and welding the welding plates to the second sealing wall by explosive welding; installing a first insulation wall(10) on the second sealing wall that maintains the air tightness, and installing a first sealing wall(40) on a surface of the first insulation wall; and installing welding plates(50) on joints(41) of the installed first sealing wall, and welding the welding plates to the first sealing wall by explosive welding so as to maintain air tightness of the first and second sealing walls.

Description

액화천연가스 저장용기용 밀봉벽의 폭발용접에 의한 접합방법{Bonding Method with explosive welding for barrier metals of the LNG tank}Bonding method with explosive welding for barrier metals of the LNG tank}

도 1 은 폭발용접에 대한 개략도1 is a schematic diagram for explosion welding

도 2 는 본 발명에 따라 1차 및 2차 밀봉벽의 폭발용접방법을 보인 예시도Figure 2 is an exemplary view showing an explosion welding method of the primary and secondary sealing wall in accordance with the present invention

도 3 은 본 발명에 따른 폭발용접에 의해 접합된 1차 및 2 차 밀봉벽을 구비한 액화천연가스 저장용기용 단열시스템을 보인 예시도3 is an exemplary view showing an insulation system for a LNG storage container having a primary and a secondary sealing wall bonded by explosion welding according to the present invention.

도 4 는 종래의 단열구조를 보인 예시도Figure 4 is an exemplary view showing a conventional heat insulation structure

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

(10) : 1차 단열벽 (20) : 2차 단열벽(10): primary insulation wall (20): secondary insulation wall

(30) : 연결판 (40) : 1차 밀봉벽30: connecting plate 40: primary sealing wall

(41) : 1차 밀봉벽 연결부위 (50) : 용착판(41): primary sealing wall connecting portion (50): welding plate

(52) : 완화판 (53) : 폭약(52): Mitigation Edition 53: Explosives

(54) : 뇌관 (55) : 스페이서54: primer 55: spacer

(60) : 2차 밀봉벽 (61) : 2차 밀봉벽 연결부위(60): secondary sealing wall (61): secondary sealing wall connection portion

(70) : 선체 (80) : 선체 단열벽 연결70: hull 80: hull insulation wall connection

(90) : 트리플렉스 (100) : 폭발진행방향(90): Triplex (100): Direction of explosion

본 발명은 액화천연가스 저장용기용 밀봉벽의 폭발용접에 의한 접합방법에 관한 것으로, 액화천연가스 저장용기용 단열시스템의 1차 밀봉벽 및 2차 밀봉벽을 폭발용접에 의해 신속하게 용접하여 작업성과 기밀성을 획기적으로 향상시킨 액화천연가스 저장용기용 밀봉벽의 폭발용접에 의한 접합방법에 관한 것이다. The present invention relates to a method of joining by explosion welding of a sealing wall for liquefied natural gas storage container, and to work by rapidly welding the first sealing wall and the second sealing wall of the insulation system for liquefied natural gas storage container by explosion welding. The present invention relates to a joining method by explosion welding of a sealing wall for a liquefied natural gas storage container that has greatly improved performance and airtightness.

오늘날, 수소, 산소 및 천연가스와 같은 물질을 대량으로 저장 및 수송하기 위하여 주로 저온 액화방법을 이용하고 있는데 그러기 위하여 저온의 액화가스를 저장 수송하는 단열용기의 설계에 있어서 외부로부터의 열침입에 의한 액화가스의 비등을 방지하는 단열기술이 무엇보다도 중요하다.Today, the low temperature liquefaction method is mainly used to store and transport large quantities of substances such as hydrogen, oxygen and natural gas. Therefore, in the design of a thermal insulation container storing and transporting low temperature liquefied gas, The insulation technology to prevent the boiling of liquefied gas is important above all.

현재 상업적으로 고안 적용되고 있는 단열방법은 외부 단열방법과 내부 단열방법이 있으며, 상기 내부 단열방법은 용기 외함의 온도를 외기온도와 유사하게 제어할 수 있으므로, 저온용 소재의 적용과 같은 소재 사용에 제약이 없는 장점이 있다. 이와 같은 내부 단열방법에는 미국의 맥도널 더글라스사의 중간 밀봉벽구조(미국특허 제 484358 호)를 기초로 2중 밀봉벽 구조를 가지는 프랑스 지티티(GTT)사의 멤브레인형 단열시스템이 알려져 있다. Insulation methods currently commercially designed and applied include an external insulation method and an internal insulation method, and the internal insulation method can control the temperature of the container enclosure similarly to the outside temperature, thereby limiting the use of materials such as the application of low-temperature materials. There is no advantage to this. For such internal insulation method, a membrane insulation system of GTT, France, which has a double sealing wall structure based on the middle sealing wall structure of US McDonald Douglas (US Patent No. 484358), is known.

도 4 는 종래의 단열구조인 프랑스 지티티(GTT)사의 마크(Mark) Ⅲ형 단열구조를 도시한 것으로, 상기 단열시스템은 상부의 1차 단열벽(10)과 하부의 2차 단열벽(20) 그리고 스테인레스강으로 이루어진 1차 밀봉벽(40)과, 트리플렉스로 이루어 진 2차 밀봉벽(60)의 이중 밀봉벽 구조로 구성되어 있으며, 상기 1차 및 2차 밀봉벽은 용접 및 접착제 등에 의해 기밀을 유지하도록 되어 있었다. FIG. 4 illustrates a Mark III type insulation structure of GTT, France, which is a conventional insulation structure. The insulation system includes a primary insulation wall 10 at an upper portion and a secondary insulation wall 20 at a lower portion. ) And a double sealing wall structure of a primary sealing wall 40 made of stainless steel and a secondary sealing wall 60 made of triplex, and the primary and secondary sealing walls are welded, adhesive, or the like. To keep it confidential.

즉, 상기와 같이 이루어진 종래의 단열시스템은 단열벽을 단열용기 내벽에 설치할 때, 2차 밀봉벽의 접합부에서 기밀성을 확보할 목적으로 단열벽 사이의 접합부를 유연 트리플렉스(90)라는 2차 밀봉벽 소재로 접착 밀봉하여 2차 밀봉벽을 접합시키고, 다시 그 위를 1차 단열벽과 동일 재질의 연결판(30)을 접착제에 의해 부착하도록 되어 있었다. 또한, 1차 밀봉벽(40)의 경우, 소재가 스테인레스 강재를 주로 사용하므로, 티그(TIG) 용접 또는 플라즈마 용접을 통해 1차 밀봉벽의 연결부위(41)를 접합하여 기밀을 유지하도록 되어 있었다. That is, the conventional heat insulation system made as described above, when the heat insulation wall is installed on the inner wall of the heat insulation container, the second portion of the joint between the heat insulation walls for the purpose of securing airtightness at the junction of the secondary seal wall is called a secondary triplex 90. It was made to adhere | attach a secondary sealing wall by adhesive sealing with a wall material, and to attach the connecting plate 30 of the same material as the primary heat insulation wall again with an adhesive agent on it again. In addition, in the case of the primary sealing wall 40, since the material is mainly made of stainless steel, the connection portion 41 of the primary sealing wall is joined to maintain airtightness through TIG welding or plasma welding. .

그러나, 상기와 같은 접착제에 의한 2차 밀봉벽의 접착밀봉은 액화천연가스 저장용기의 특성상 최선의 기밀을 유지해야 하므로, 단순한 접착이 아니라 작업의 난이도가 매우 높고, 불량율 발생이 높아 필요로 하는 기밀성을 확보하는 데 상당한 시공상의 주의를 필요로 하는 문제점이 있었다. However, the adhesive seal of the secondary sealing wall by the adhesive as described above should maintain the best airtight in the nature of the liquefied natural gas storage container, not a simple adhesion but very difficult operation, high occurrence of defective rate, the airtightness required There was a problem that requires considerable construction attention to secure.

또한, 티그용접 및 플라즈마 용접에 의한 1차 밀봉벽의 용접접합은 액화천연가스 저장용기의 벽면과 천정부분의 용접에 소요공수가 많고, 용접자세에 따라 안전사고가 발생할 수 있으며, 용접관련 장비의 설치 및 이송 등에 어려움이 있는 등 여러가지 문제점을 내포하고 있었다. In addition, the welding of the primary sealing wall by TIG welding and plasma welding requires a lot of labor for welding the wall and ceiling of the LNG storage container, and a safety accident may occur depending on the welding posture. There were various problems such as difficulty in installation and transportation.

본 발명은 상기와 같은 문제점을 해소하기 위한 것으로, 그 목적은 액화천연 가스 저장용기용 단열시스템의 1차 및 2차 밀봉벽을 폭발용접에 의해 접합시켜, 공정시간 단축 및 작업성을 용이하게 하고, 우수한 접합력 및 접합신뢰도를 구비함과 동시에, 우수한 단열성 및 기밀성을 구비할 수 있는 액화천연가스 저장용기용 1차 및 2차 밀봉벽의 폭발용접에 의한 접합방법을 제공하는 것이다. The present invention is to solve the above problems, the object is to join the primary and secondary sealing wall of the insulation system for liquefied natural gas storage container by explosion welding, to shorten the process time and workability It is to provide a bonding method by explosion welding of the primary and secondary sealing walls for liquefied natural gas storage container that can be provided with excellent bonding strength and bonding reliability, and excellent heat insulating property and airtightness.

본 발명은 2차 단열벽(20)을 설치하고 그 표면에 2차 밀봉벽(60)을 설치하는 단계와, 상기 설치된 2차 밀봉벽의 연결부위(61)에 용착판(50)을 설치하고 상기 용착판(50)을 폭발용접에 의해 2차 밀봉벽(60)과 접합하여 2차 밀봉벽(60)의 기밀을 유지하는 단계와, 상기 기밀을 유지하는 2차 밀봉벽(60) 위에 1차 단열벽(10)을 설치하고 그 표면에 1차 밀봉벽(40)을 설치하는 단계와, 상기 설치된 1차 밀봉벽의 연결부위(41)에 용착판(50)을 설치하고 상기 용착판(50)을 폭발용접에 의해 1차 밀봉벽(40)과 접합하여 1차 밀봉벽의 기밀을 유지하는 단계로 이루어져 있다. The present invention provides a step of installing the secondary heat insulating wall 20 and the secondary sealing wall 60 on the surface thereof, and installing the welding plate 50 on the connection portion 61 of the installed secondary sealing wall Bonding the welding plate 50 to the secondary sealing wall 60 by explosion welding to maintain the airtightness of the secondary sealing wall 60; and on the secondary sealing wall 60 to maintain the airtightness. Installing the primary heat insulating wall 10 and the primary sealing wall 40 on the surface, and the welding plate 50 is installed on the connection portion 41 of the installed primary sealing wall and the welding plate ( 50) is joined to the primary sealing wall 40 by explosion welding to maintain the airtightness of the primary sealing wall.

즉, 본 발명은 1, 2차 밀봉벽의 연결부위(41,61)에 용착판(50)을 설치하고, 상기 용착판(50)의 상부면에 폭발용접 속도 및 접합정도를 조정하는 완화판(52)과 폭약(53)을 설치한 다음, 상기 폭약(53)의 일측 모서리에 설치된 기폭용 뇌관(54)에 의해 기폭하여 1차 밀봉벽(40) 또는 2차 밀봉벽(60)과 용착판(50)을 폭발용접 하도록 되어 있다. 이때, 상기 용착판(50)과 1, 2차 밀봉벽(40,60)의 용착속도는 통상 약 100∼500㎧로 진행된다. That is, in the present invention, the welding plate 50 is installed on the connection portions 41 and 61 of the primary and secondary sealing walls, and the relaxation plate for adjusting the explosion welding speed and the bonding degree on the upper surface of the welding plate 50. 52 and the explosives 53 are installed, and then detonated by the detonator primer 54 installed at one corner of the explosives 53 to weld with the primary sealing wall 40 or the secondary sealing wall 60. Explosion welding of the plate 50 is made. At this time, the welding speed of the welding plate 50 and the primary and secondary sealing walls 40 and 60 is usually about 100 to 500 kPa.

이하 본 발명을 첨부된 도면에 의해 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

폭발용접에 의한 금속의 접합은 미국특허 3,140,539에 의해 이미 공지된 기술로 파이프간의 용접, 이종금속간의 용접 (알루미늄과 탄소강, 티타늄합금과 크롬/니켈 합금, 구리와 스테인레스강, 텅스텐과 탄소강 등), 화학장치산업, 우주항공산업등에 응용개량되어 널리 사용되고 있다.Bonding of metals by explosion welding is a technique already known by US Pat. No. 3,140,539, welding between pipes, welding between dissimilar metals (aluminum and carbon steel, titanium alloy and chromium / nickel alloys, copper and stainless steel, tungsten and carbon steel, etc.), It is widely used in the chemical device industry and the aerospace industry.

도 1 은 본 발명의 폭발용접에 대한 개략도를 도시한 것으로, 본 발명에서 액화천연가스 저장용기용 단열시스템에 금속소재의 밀봉벽(40,60)의 접합에 응용되는 폭발용접기술은 박판금속 (알루미늄 또는 스테인레스)의 폭발 용접 접합에 맞도록 개량 보완된 것으로 폭약으로는 아르디엑스(RDX; cyclotrimethylene trinitramine), 사초산펜타에리트릿(PETN; pentaerythritol tetranitrate), 티엔티(TNT), 테트릴(tetryl), 아지드화납 (Lead azide), 질산암모늄(ammonium nitrate) 등을 적용하며 용착판(50)에 도포된 폭약 직화에 의해 폭발이 진행되면 급격한 압력상승으로 발생된 충격파(shock wave)가 용착판(50)을 순간적으로 이동시켜 밀봉벽(40,60)을 높은 속도(Vc)로 때려 충돌점(collision point)에서 강한 플라즈마 에너지의 발생으로 두 금속간 소성변형 즉, 금속간의 전자공유결합이 파형 (wave-forming) 또는 선형(linear-forming)으로 형성되면서 금속접합이 매우 높은 속도(Vk)로 순식간에 진행되면서 폭발용접이 이루어 진다. 미설명 부호 D 는 폭약의 폭발진행속도, h 는 용착판과 밀봉벽의 이격거리, α는 용착판과 밀봉벽이 이루는 각도, P는 충돌점을 나타낸다.Figure 1 shows a schematic diagram of the explosion welding of the present invention, the explosion welding technology applied to the bonding of the sealing wall (40, 60) of the metal material in the thermal insulation system for liquefied natural gas storage container in the present invention is a sheet metal ( Explosion-welded joints of aluminum or stainless steel are used as explosives for explosives. Lead azide, ammonium nitrate, and the like are applied, and when the explosion proceeds by explosive directing applied to the welding plate 50, a shock wave generated by a sudden pressure increase is applied to the welding plate 50. ) Momentarily move the sealing walls (40, 60) at a high speed (Vc) to generate a strong plasma energy at the collision point (collision point) plastic deformation between the two metals, that is, the electron covalent bond between the waves -forming Exploration welding is performed by forming a metal by linear-forming or metal joining at a very high speed (Vk). Reference numeral D denotes the explosive velocity of explosives, h denotes the separation distance between the weld plate and the sealing wall, α denotes the angle between the weld plate and the sealing wall, and P denotes the collision point.

도 2 는 본 발명에 따라 1차 및 2차 밀봉벽의 폭발용접방법을 보인 예시도 를, 도 3 은 본 발명에 따른 폭발용접에 의해 접합된 1차 및 2 차 밀봉벽을 구비한 액화천연가스 저장용기용 단열시스템을 보인 예시도를 도시한 것으로, 본 발명은 1차 및 2차 밀봉벽의 연결부위(41,61)에 용착판(50) 및 폭약(53)을 설치한 후, 상기 폭약(53)을 기폭용 뇌관(54)에 의해 기폭하여 폭발에너지에 의해 용착판(50)과 이에 접촉되는 1차 또는 2차 밀봉벽(40,60)의 일측 부분을 폭발용접 하도록 되어 있다. 2 is an exemplary view showing an explosion welding method of the primary and secondary sealing wall according to the present invention, Figure 3 is a liquefied natural gas having a primary and secondary sealing wall bonded by explosion welding in accordance with the present invention Exemplary view showing an insulating system for a storage container, the present invention is installed after the welding plate 50 and the explosives 53 in the connection portion (41, 61) of the primary and secondary sealing wall, the explosive charge The detonator 53 is detonated by the detonator primer 54 so that the weld plate 50 and one side portion of the primary or secondary sealing walls 40 and 60 contacted by the explosion energy are exploded welded.

이때, 상기 1차 밀봉벽(40) 또는 2차 밀봉벽(60)은 폭발용접에 의해 접합이 가능한 금속재질 즉, 스테인레스강, 알루미늄합금, 인바 강 등의 금속재질로 이루어져 있으며, 유리섬유, 금속연결부, 유리섬유의 3중구조로 이루어진 소재라 하더라도, 도 3 에 도시된 바와 같이, 금속연결부를 맞대어 최대한 밀착시키면 적용이 가능하다. At this time, the primary sealing wall 40 or the secondary sealing wall 60 is made of a metal material that can be joined by explosion welding, that is, a metal material such as stainless steel, aluminum alloy, Invar steel, glass fiber, metal Even if the material is made of a triple structure of the connecting portion, glass fiber, as shown in Figure 3, it is possible to apply if the metal connection to the close contact as possible.

또한, 상기 2차 밀봉벽의 경우, 일측 2차 밀봉벽과 이에 이웃하는 또다른 2차 밀봉벽을 직접적으로 폭발용접에 의해 접합할 수 있을 뿐만 아니라, 별도의 연결소재를 이용하여 2차 밀봉벽을 폭발용접에 의해 접합할 수도 있다. In addition, in the case of the secondary sealing wall, not only the secondary sealing wall on one side and another secondary sealing wall adjacent thereto can be directly bonded by explosion welding, but the secondary sealing wall using a separate connecting material. Can be joined by explosion welding.

상기 용착판(50)은 폭발용접에 의해 1차 밀봉벽(40) 또는 2차 밀봉벽(60)에 접합되어 1차 및 2차 밀봉벽의 기밀을 유지하도록 하는 것으로, 1차 밀봉벽 또는 2차 밀봉벽의 연결부위에 위치하도록 설치되고, 그 위에 폭약(53)이 설치되며, 용착판과 폭약 사이에 필요시 선택할 수 있는 용접속도 조절용 완화판(52)이 더 설치된다. The welding plate 50 is bonded to the primary sealing wall 40 or the secondary sealing wall 60 by explosion welding to maintain the airtightness of the primary and secondary sealing walls, the primary sealing wall or 2 It is installed to be located at the connection portion of the vehicle sealing wall, and the explosives 53 are installed thereon, and a welding speed control relaxation plate 52 that can be selected if necessary between the welding plate and the explosives is further installed.

또한, 상기 용착판(50)은 도 2 와 같이, 1차 및 2차 밀봉벽의 연결부위가 맞 대기와 같이 그 끝단이 서로 마주보도록 위치할 경우, 1차 및 2차 밀봉벽(40,60)과 용착판(50) 사이에 스페이서(55)를 설치하여 1차 및 2차 밀봉벽과의 이격거리를 일정하게 유지시킴으로써, 폭발용접시 접합의 균일성 및 균일한 접합강도를 획득할 수 있다. 이때, 상기 스페이서(55)는 용착판과 1차 또는 2차 밀봉벽 사이에 필요에 따라 하나 이상 배치된다. In addition, the welding plate 50, as shown in Figure 2, when the connecting portion of the primary and secondary sealing wall is positioned so that the ends thereof face each other, such as waiting, primary and secondary sealing walls (40, 60) ) And the spacer 55 is installed between the welding plate 50 and the welding plate 50 to maintain a constant distance from the primary and secondary sealing walls, thereby obtaining uniformity and uniform bonding strength during explosion welding. . At this time, one or more spacers 55 are disposed between the welding plate and the primary or secondary sealing wall as necessary.

또한, 상기 용착판은 경사지게 또는, 1차 및 2차 밀봉벽과 평행하도록 설치할 수 있으며, 이때, 설치되는 폭약의 양을 조절하여 폭발용접시 용착판이 1차 밀봉벽(또는 2차 밀봉벽)에 균일한 접합강도를 구비하도록 할 수 있다. 이때, 상기 적용되는 폭발물의 양과 종류 및 장입의 형태는 용접되는 소재의 형상, 강도특성, 용융온도, 두께 등을 고려하여 용접현장에서 충분한 압력이 발생되도록 결정한다. In addition, the welding plate may be installed to be inclined or parallel to the primary and secondary sealing walls, and in this case, by adjusting the amount of explosives installed, the welding plate may be installed on the primary sealing wall (or secondary sealing wall). It can be provided with a uniform bonding strength. At this time, the amount and type of the explosives to be applied and the shape of the charge is determined so that sufficient pressure is generated at the welding site in consideration of the shape, strength characteristics, melting temperature, thickness of the material to be welded.

상기 완화판(52)은 폭발용접의 폭발력에 의해 발생되는 용착판의 손상 및 1,2차 밀봉벽의 변형방지 및 용착속도를 제어하기 위하여 설치되는 것으로, 용착판의 크기와 동일하도록 설치하며, 밀봉벽의 금속판 두께에 따라 그 두께를 가감하거나 생략할 수 있다. The relief plate 52 is installed to control the damage of the welding plate generated by the explosive force of the explosion welding and the deformation prevention and welding speed of the first and second sealing walls, the same as the size of the welding plate, Depending on the thickness of the metal plate of the sealing wall, the thickness can be added or subtracted or omitted.

상기 폭약(53)은 완화판(52) 또는, 용착판(50) 위에 위치하도록 설치되며, 일측 끝단에 발파기와 도선에 의해 연결된 기폭용 뇌관이 설치되어 있다. 이때, 상기 폭약은 완화판과 거의 동일한 면적을 구비하도록 설치한다.The explosives 53 are installed to be positioned on the alleviation plate 52 or the welding plate 50, and a detonator primer is connected to one end by a blasting device and a conducting wire. At this time, the explosives are installed to have almost the same area as the relief plate.

상기와 같이 구성된 본 발명은 1,2차 밀봉벽의 연결부위를 세척제로 전처리하고, 상기 전처리된 1,2차 밀봉벽의 연결부위 위에 용착판을 설치하며, 용착판 상부에 댐을 만들어 폭약을 필요한 높이만큼 충전한 후 고정한다. 이때, 상기 용착판 과 폭약 사이에는 완화판을 더 설치할 수 있으며, 상기 용착판과 1,2차 밀봉벽 사이에 스페이서를 설치하여 용착판과 1, 2차 밀봉벽이 일정한 이격거리를 유지하도록 할 수 있다. The present invention configured as described above is pre-treated with the connection portion of the first and second sealing wall with a cleaning agent, install a welding plate on the connection portion of the pre-treated primary and secondary sealing wall, make a dam on the upper welding plate to explode Charge it to the required height and fix it. In this case, a relaxation plate may be further installed between the welding plate and the explosive, and a spacer may be installed between the welding plate and the first and second sealing walls to maintain a constant separation distance between the welding plate and the first and second sealing walls. Can be.

또한, 상기 폭약의 일측에는 기폭용 뇌관을 설치한 후, 이를 도선 등에 의해 발파기(도시없음)와 연결하여 기폭한다. In addition, one side of the explosive is installed after the detonator primer, and connected to the blasting machine (not shown) by a wire or the like to detonate.

이와 같이 기폭되면, 폭약이 터지면서 발생하는 폭발에너지에 의해 용착판이 1차 밀봉벽 연결부위(41) 또는 2차 밀봉벽 연결부위(61)에 폭발용접되어 1차 밀봉벽(또는 2차 밀봉벽)이 기밀을 유지하도록 접합된다.When detonated in this way, the welding plate is explosion-welded to the primary sealing wall connecting portion 41 or the secondary sealing wall connecting portion 61 by the explosive energy generated by the explosives exploding, and thus the primary sealing wall (or the secondary sealing wall). ) Are bonded to maintain airtightness.

본 발명은 상술한 특정의 바람직한 실시예에 한정되지 아니하며, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형실시가 가능한 것은 물론이고, 그와 같은 변경은 청구범위 기재의 범위내에 있게 된다.The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

이와 같이 본 발명은 액화천연가스 저장용기용 단열시스템의 1,2차 밀봉벽을 폭발용접에 의해 접합하도록 되어 있어, 신속한 작업 및 작업공정을 단축할 수 있다. 즉, 통상적인 폭발진행 속도는 1600∼2400㎧ 정도이며, 용착판과 1,2차 밀봉벽의 용착속도는 약 100∼500㎧로 진행되므로, 기존 용접과 대비할 경우, 접합속도가 약 500배 이상을 구비하게 되므로, 소요공수를 획기적으로 절감할 수 있다. Thus, the present invention is to join the first and second sealing walls of the liquefied natural gas storage container thermal insulation system by explosion welding, it is possible to shorten the rapid work and work process. That is, the normal explosion progress speed is about 1600-2400㎧, and the welding speed of the welding plate and the 1st and 2nd sealing wall is about 100 ~ 500 ,, which is about 500 times higher than the conventional welding. Since it is provided, it can significantly reduce the required labor.

또한, 본 발명은 폭발용접에 의해 1차 및 2차 밀봉벽이 접합되므로, 접합부의 기밀성 즉, 극저온 액화가스의 누출방지성을 효과적으로 개선할 수 있다. In addition, in the present invention, since the primary and secondary sealing walls are joined by explosion welding, the airtightness of the joint portion, that is, leakage prevention of cryogenic liquefied gas can be effectively improved.

또한, 본 발명은 폭발용접용 자재의 설치만으로 접합이 가능하므로, 벽면과 천정부위 등과 같이 기존의 용접으로는 적용하기 곤란한 부분에도 용이하게 적용할 수 있으며, 이를 통해 안전사고 발생을 미연에 방지할 수 있는 등 많은 효과가 있다.In addition, since the present invention can be bonded only by installing the explosion welding material, it can be easily applied to a part which is difficult to apply by conventional welding, such as a wall surface and a ceiling part, thereby preventing safety accidents in advance. There are so many effects.

Claims (2)

액화천연가스 저장용기용 단열시스템의 1차 및 2차 밀봉벽을 접합하는 방법에 있어서, In the method of joining the primary and secondary sealing walls of the insulation system for liquefied natural gas storage container, 단열시스템의 2차 단열벽을 설치하고 그 표면에 2차 밀봉벽을 설치하는 단계;Installing a secondary insulation wall of the insulation system and installing a secondary sealing wall on its surface; 상기 설치된 2차 밀봉벽의 연결부위에 용착판을 설치하고 용착판을 폭발용접에 의해 2차 밀봉벽에 용착 접합하는 단계;Installing a welding plate on the connection portion of the installed secondary sealing wall and welding the welding plate to the secondary sealing wall by explosion welding; 상기 기밀을 유지하는 2차 밀봉벽 위에 1차 단열벽을 설치하고 그 표면에 1차 밀봉벽을 설치하는 단계;Installing a primary insulating wall on the secondary sealing wall to maintain the airtightness and installing a primary sealing wall on the surface thereof; 상기 설치된 1차 밀봉벽의 연결부위에 용착판을 설치하고 상기 용착판을 폭발용접에 의해 1차 밀봉벽에 용착접합하는 단계;를 통해, 1,2차 밀봉벽의 기밀을 유지하도록 한 것을 특징으로 하는 액화천연가스 저장용기용 밀봉벽의 폭발용접에 의한 접합방법.Installing a welding plate on the connection portion of the installed primary sealing wall and welding the welding plate to the primary sealing wall by explosion welding; to maintain the airtightness of the primary and secondary sealing walls. Joining method by explosion welding of the sealing wall for liquefied natural gas storage container. 제 1 항에 있어서;The method of claim 1; 상기 1,2차 밀봉벽의 연결부위는 그 끝단이 서로 마주보는 맞대기 형식으로 설치되는 것을 특징으로 하는 액화천연가스 저장용기용 밀봉벽의 폭발용접에 의한 접합방법.The connection part of the 1st and 2nd sealing wall is a joining method by the explosion welding of the sealing wall for liquefied natural gas storage container characterized in that the ends are installed in the butt-type facing each other.
KR1020060119939A 2006-11-30 2006-11-30 Bonding method with explosive welding for barrier metals of the lng tank KR20080049419A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160028245A (en) 2014-09-03 2016-03-11 정성근 A rice cake cutting device
KR20180062322A (en) * 2016-11-29 2018-06-08 한국과학기술원 Vessel-attachment apparatus by using explosion welding
KR20230082443A (en) 2021-12-01 2023-06-08 박찬 A drying rack that opens up
US11889223B2 (en) 2021-03-31 2024-01-30 Raytheon Company Explosively welded cooled infrared camera

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160028245A (en) 2014-09-03 2016-03-11 정성근 A rice cake cutting device
KR20180062322A (en) * 2016-11-29 2018-06-08 한국과학기술원 Vessel-attachment apparatus by using explosion welding
US11889223B2 (en) 2021-03-31 2024-01-30 Raytheon Company Explosively welded cooled infrared camera
KR20230082443A (en) 2021-12-01 2023-06-08 박찬 A drying rack that opens up

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