KR20200046502A - Buckling Restraint System of Expansion Joints for LNG Shipments - Google Patents

Buckling Restraint System of Expansion Joints for LNG Shipments Download PDF

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KR20200046502A
KR20200046502A KR1020180127732A KR20180127732A KR20200046502A KR 20200046502 A KR20200046502 A KR 20200046502A KR 1020180127732 A KR1020180127732 A KR 1020180127732A KR 20180127732 A KR20180127732 A KR 20180127732A KR 20200046502 A KR20200046502 A KR 20200046502A
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South Korea
Prior art keywords
pipe
welded
lng
expansion joint
flanges
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KR1020180127732A
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Korean (ko)
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김휘중
최원준
김동철
오명환
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주식회사 에스제이엠
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Priority to KR1020180127732A priority Critical patent/KR20200046502A/en
Publication of KR20200046502A publication Critical patent/KR20200046502A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L51/00—Expansion-compensation arrangements for pipe-lines
    • F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
    • F16L51/03—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube comprising two or more bellows
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L51/00—Expansion-compensation arrangements for pipe-lines
    • F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
    • F16L51/025—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube with several corrugations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L51/00—Expansion-compensation arrangements for pipe-lines
    • F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
    • F16L51/027—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube with external reinforcement

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joints Allowing Movement (AREA)

Abstract

The present invention relates to an apparatus for preventing the buckling of an expansion joint installed in a pipe for an LNG vessel transferring liquefied natural gas (hereinafter referred to as ″LNG″), capable of preventing an expansion joint from being bent even if the expansion volume of a pipe gets larger by improving stability against pressure due to a structural improvement for the expansion joint. To achieve the purpose, in regard to the apparatus for preventing the buckling of an expansion joint of a pipe for an LNG vessel, in which first and second bellow parts (20, 30) are welded to a pair of flanges (11) and a cylindrical part (40) is welded between the first and second bellow parts (20, 30), the apparatus for preventing the buckling of an expansion joint of a pipe for an LNG vessel, in which first and second bellow parts (20, 30) are welded to a pair of flanges (11) and a cylindrical part (40) is welded between the first and second bellow parts (20, 30), comprises: a plurality of lugs (60) including an insertion hole (60a) and welded to correspond to the outer circumference surface of the flanges (11) at equidistant intervals; a guide member (70) welded to the outer circumference surface of the cylindrical part (40) by including an insertion hole (70a) formed to be located on the same axis line as the insertion hole (60a) formed on each of the lugs (60); and a stud bolt (80) fixed to the flanges (11) through a fastener (90) by being inserted into the insertion holes (60a, 70a) formed on each of the lugs (60) and the guide member (70).

Description

LNG선박용 배관의 신축이음관 좌굴 방지장치{Buckling Restraint System of Expansion Joints for LNG Shipments}Buckling Restraint System of Expansion Joints for LNG Shipments}

본 발명은 액화천연가스(이하 "LNG"라 함)를 운송하는 LNG선박용 배관에 설치되는 신축이음관에 관한 것으로써, 좀더 구체적으로는 신축이음관의 구조 개선으로 압력에 대한 안정성을 향상시켜 배관의 신축량이 커지더라도 신축이음관이 꺾이는 현상을 미연에 방지할 수 있도록 하는 LNG선박용 배관의 신축이음관 좌굴 방지장치에 관한 것이다.
The present invention relates to a telescopic pipe installed in a pipe for an LNG carrier that transports liquefied natural gas (hereinafter referred to as "LNG"), and more specifically, to improve the stability of pressure by improving the structure of the telescopic pipe. It relates to an anti-buckling device for a new joint pipe of an LNG carrier so that even if the expansion amount of the pipe increases, the expansion joint pipe can be prevented from breaking.

일반적으로, 액화천연가스(LNG)는 석유자원의 대체재로 이용하기에 부족함이 없으며, 약 70년 이상을 사용할 수 있을 정도의 충분한 매장량으로 LNG 산업은 급속히 확대되어 가고 있다.In general, liquefied natural gas (LNG) is not insufficient to be used as a substitute for petroleum resources, and the LNG industry is rapidly expanding with sufficient reserves that can be used for about 70 years or more.

또한, 도심지역의 가정용 연료 CNG(Compressed Natural Gas)의 자동차 연료 활용 등 LNG 수요의 위치적 특성을 고려할 때 LNG 저장/수송 설비들의 안전에 관한 보완 시스템 개발, 보급은 많으면 많을수록 유리한 실정이다.In addition, considering the locational characteristics of LNG demand, such as the use of automobile fuel for household fuel CNG (Compressed Natural Gas) in urban areas, the more developed and distributed the supplementary system is, the more advantageous it is.

한편, 변위를 흡수하는 벨로우즈(bellows) 형태의 신축이음관(expansion joint)이 LNG선박의 배관 상에 설치된다.On the other hand, expansion joints in the form of bellows that absorb displacement are installed on the pipes of the LNG carrier.

상기 LNG선박의 배관에는 열, 압력 및 응력 등으로 인하여 팽창 및 수축 변위가 발생하며, 발생된 변위는 연결된 신축 이음관이 모두 흡수하여야 하지만 180여종의 유해화학물질 LNG(-162 ~ 80℃)등과 같이 온도변화 등의 요인(변형, 균열, 용접결합, 진동, 충격, 압력, 부식)이 클 경우 또는 불확실한 외부환경요인으로 인하여 신축 이음관의 초기 설계 허용 값 이상의 변위가 발생한다면 배관 및 벨로우즈의 변형, 균열, 누유 및 파손 등 심각한 안전사고가 우려되는 문제점이 있다.Expansion and contraction displacement occurs due to heat, pressure, and stress in the piping of the LNG vessel, and the generated displacement must be absorbed by all connected expansion and contraction pipes, but with 180 kinds of hazardous chemicals LNG (-162 ~ 80 ℃) Likewise, if the factors such as temperature change (deformation, cracking, welding bond, vibration, impact, pressure, corrosion) are large, or if the displacement of the new joint pipe exceeds the initial design allowable value due to uncertain external environmental factors, deformation of piping and bellows , There is a problem that serious safety accidents such as cracks, leaks and damages are concerned.

특히, LNG 연료는 특성상 고압 저온상태(1atm, -162℃)에서 액체 상태로 저장, 수송되고 인화성 또한 높아 약간의 온도상승으로 인해서도 폭발 가스 형태로 누출사고의 가능성이 높아 LNG를 수송하는 선박에서 배관의 신축에 따른 변위를 흡수하는 신축이음관의 역할은 매우 중요한 요소이다.In particular, LNG fuel is stored and transported in a liquid state at a high pressure and low temperature (1 atm, -162 ° C) due to its characteristics, and its flammability is also high, so there is a high possibility of leakage in the form of an explosive gas due to a slight temperature rise. The role of the expansion joint pipe that absorbs displacement due to the expansion and contraction of the pipe is a very important factor.

도 1은 종래의 신축이음관을 나타낸 종단면도로써, 종래의 신축이음관(10)은 복수 개의 체결공(11a)이 형성된 한 쌍의 플랜지(11)에 배관의 변위를 흡수하는 제1 벨로우즈부(20) 및 제2 벨로우즈부(30)의 일단이 각각 용접 고정되어 있고 상기 제1, 2 벨로우즈부(20)(30)의 사이에는 원통부(40)가 용접 고정되어 있다.1 is a longitudinal cross-sectional view showing a conventional expansion joint, the conventional expansion joint 10 is a first bellows portion for absorbing the displacement of the pipe to a pair of flanges 11 formed with a plurality of fastening holes (11a) (20) and one end of the second bellows portion 30 are respectively welded and fixed, and the cylindrical portion 40 is welded between the first and second bellows portions 20 and 30.

이러한 신축이음관(10)은 배관에 고정된 플랜지(도시는 생략함) 사이에 기밀을 유지하기 위한 패킹(50)을 위치시킨 다음 신축이음관(10)의 플랜지(11)를 맞대고 체결공(11a)을 통해 보울트 및 너트 등과 같은 체결부재로 체결하여 설치하게 된다.The expansion joint 10 is positioned between the flange fixed to the pipe (not shown) to maintain the airtight packing 50, and then the butt against the flange 11 of the expansion joint 10 ( Through 11a), it is installed by fastening with a fastening member such as a bolt and a nut.

따라서 LNG를 운송하는 과정에서 배관에 변위가 발생하면 제1, 2 벨로우즈부(20)(30)가 신축하면서 발생된 변위를 흡수하게 되므로 배관이 파손되는 현상을 방지하게 된다.
Therefore, when displacement occurs in the pipe during the process of transporting LNG, the first and second bellows portions 20 and 30 absorb the displacement generated during expansion and contraction, thereby preventing the pipe from being damaged.

(선행기술문헌)(Advanced technical literature)

(특허문헌 0001) 대한민국 등록특허공보 10-1365957(2014.02.17.등록)(Patent Document 0001) Republic of Korea Registered Patent Publication 10-1365957 (Registration on February 17, 2014)

(특허문헌 0002) 대한민국 등록특허공보 10-1532895(2015.06.24.등록)
(Patent Document 0002) Republic of Korea Registered Patent Publication 10-1532895 (Registered on June 24, 2015)

그러나 이러한 종래의 신축이음관은 배관의 신축량이 커질수록 제1, 2 벨로우즈부의 산수(山數)를 증대시켜야 되지만, 제1, 2 벨로우즈부의 산수를 증대시키면 배관에 작용되는 압력에 대한 안정성이 떨어지게 되므로 배관 내에 작용되는 압력이 커질 때 신축이음관이 꺾이는 좌굴현상이 발생되면서 신축이음관이 파손되는 치명적인 결함이 있었다.However, in the conventional expansion joint pipe, as the amount of expansion and contraction of the pipe increases, the number of first and second bellows must increase. Therefore, when the pressure acting on the pipe increases, there is a fatal defect in which the expansion joint tube is damaged due to a buckling phenomenon in which the expansion joint tube is bent.

본 발명은 종래의 이와 같은 문제점을 해결하기 위해 안출한 것으로써, 배관에 작용되는 압력이 커져 제1, 2 벨로우즈부의 산수를 증대시키더라도 신축이음관이 좌굴되는 현상을 근본적으로 해소시킬 수 있도록 하는 데 그 목적이 있다.
The present invention has been devised to solve such a problem in the related art, and it is possible to fundamentally solve the phenomenon that the expansion joint pipe buckles even though the pressure applied to the pipe increases to increase the number of first and second bellows. It has its purpose.

상기 목적을 달성하기 위한 본 발명의 형태에 따르면, 한 쌍의 플랜지에 제1, 2 벨로우즈부가 용접 고정되고 상기 제1, 2 벨로우즈부의 사이에는 원통부가 용접 고정된 LNG선박용 배관의 신축이음관 좌굴 방지장치에 있어서, 한 쌍의 플랜지 외주 면에 등 간격으로 대응되게 용접 고정되고 삽입공이 형성된 복수 개의 러그와, 상기 각 러그에 형성된 삽입공과 동일 축선 상에 위치하는 삽입공이 형성되어 원통부의 외주 면에 용접 고정된 가이드부재와, 상기 각 러그 및 가이드부재에 형성된 삽입공을 통해 끼워져 플랜지에 체결부재로 고정된 스터드 볼트로 구성된 것을 특징으로 하는 LNG선박용 배관의 신축이음관 좌굴 방지장치가 제공된다.
According to an aspect of the present invention for achieving the above object, the first and second bellows are welded and fixed to a pair of flanges, and a cylindrical joint is welded and fixed between the first and second bellows to prevent expansion and contraction of the expansion pipe of the LNG vessel. In the apparatus, a plurality of lugs fixedly welded to each other at equal intervals on a pair of flange outer circumferential surfaces, and insertion holes positioned on the same axis as the insertion holes formed in the respective lugs are formed and welded to the outer circumferential surface of the cylindrical portion Provided is a flexible guide tube buckling preventing device for a LNG ship pipe, characterized in that it comprises a fixed guide member and a stud bolt fitted to each flange through an insertion hole formed in the guide member and fixed to the flange.

본 발명은 제1, 2 벨로우즈부의 산수(山數)를 증대시키더라도 스터드 볼트가 가이드부재에 형성된 삽입공에 끼워져 한 쌍의 플랜지에 체결부재로 고정되어 있어 제1, 2 벨로우즈부의 좌굴에 대한 대향력이 향상되어 배관에 작용되는 압력에 대한 안정성을 향상시키므로 신축이음관이 가이드부재에 안내되어 수평 이동하여 좌굴되지 않는 효과를 얻게 된다.
In the present invention, even if the arithmetic (山 數) of the first and second bellows is increased, the stud bolt is inserted into the insertion hole formed in the guide member and fixed to the pair of flanges as a fastening member, so that the first and second bellows are buckled against buckling. Since the direction is improved and the stability against the pressure applied to the pipe is improved, the expansion joint pipe is guided to the guide member and horizontally moved to obtain an effect that does not buckle.

도 1은 종래의 신축이음관을 나타낸 종단면도
도 2는 본 발명의 일 실시예를 일부 분해하여 나타낸 사시도
도 3은 도 2의 조립상태 정면도
도 4는 본 발명에서 스터드 볼트가 설치된 다른 실시예를 나타낸 종단면도1 is a longitudinal sectional view showing a conventional expansion joint
Figure 2 is a perspective view showing a partially exploded embodiment of the present invention
Figure 3 is a front view of the assembled state of Figure 2
Figure 4 is a longitudinal sectional view showing another embodiment in which the stud bolt is installed in the present invention

이하, 첨부한 도면을 참고로 하여 본 발명의 실시예에 대하여 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자가 용이하게 실시할 수 있도록 상세히 설명한다. 본 발명은 여러 가지 상이한 형태로 구현될 수 있으며 여기에서 설명하는 실시예에 한정되지 않는다. 도면들은 개략적이고 축적에 맞게 도시되지 않았다는 것을 일러둔다. 도면에 있는 부분들의 상대적인 치수 및 비율은 도면에서의 명확성 및 편의를 위해 그 크기에 있어 과장되거나 감소되어 도시되었으며 임의의 치수는 단지 예시적인 것이지 한정적인 것은 아니다. 그리고 둘 이상의 도면에 나타나는 동일한 구조물, 요소 또는 부품에는 동일한 참조 부호가 유사한 특징을 나타내기 위해 사용된다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains can easily practice. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. It is noted that the drawings are schematic and not drawn to scale. The relative dimensions and proportions of the parts in the figures are shown exaggerated or reduced in size for clarity and convenience in the drawings, and any dimensions are merely illustrative and not limiting. And the same reference numerals are used to indicate similar features in the same structures, elements, or parts appearing in two or more drawings.

도 2는 본 발명의 일 실시예를 일부 분해하여 나타낸 사시도이고 도 3은 도 2의 조립상태 정면도로써, 본 발명의 구성 중 종래의 구성과 동일한 부분은 그 설명을 생략하고 동일부호를 부여하기로 한다.Figure 2 is a perspective view showing an exploded view of one embodiment of the present invention and Figure 3 is a front view of the assembled state of Figure 2, parts of the configuration of the present invention, the same as the conventional configuration will be omitted and the same reference numerals do.

본 발명은 복수 개의 체결공(11a)이 형성된 한 쌍의 플랜지(11)에 배관의 변위를 흡수하는 제1 벨로우즈부(20) 및 제2 벨로우즈부(30)의 일단이 각각 용접 고정되어 있고 상기 제1, 2 벨로우즈부(20)(30)의 사이에는 원통부(40)가 용접 고정되어 있다.In the present invention, one end of the first bellows portion 20 and the second bellows portion 30 that absorb displacement of the pipe is welded and fixed to a pair of flanges 11 formed with a plurality of fastening holes 11a, respectively. The cylindrical part 40 is welded and fixed between the 1st and 2nd bellows parts 20 and 30.

그리고 상기 한 쌍의 플랜지(11) 외주 면에 등 간격으로 대응되게 삽입공(60a)이 형성된 복수 개의 러그(lug)(60)가 용접 고정되어 있고 상기 원통부(40)의 외주 면에는 각 러그(60)에 형성된 삽입공(60a)과 동일 축선 상에 위치하는 삽입공(70a)이 형성된 가이드부재(70)가 용접 고정되어 있으며 상기 각 러그(60) 및 가이드부재(70)에 형성된 삽입공(60a)(70a)에는 스터드 볼트(80)가 끼워져 플랜지(11)에 체결부재(90)로 고정되어 있다.In addition, a plurality of lugs 60 having welding holes 60a formed to be equally spaced on the outer circumferential surface of the pair of flanges 11 are fixed by welding, and each lug is provided on the outer circumferential surface of the cylindrical portion 40. Insertion holes (60a) formed in the (60) and the guide member (70) is formed with an insertion hole (70a) located on the same axis is fixed by welding and the insertion hole formed in each of the lugs (60) and the guide member (70) The stud bolt 80 is fitted to the (60a) (70a) is fixed to the flange 11 with a fastening member (90).

상기 원통부(40)의 외주 면에 용접 고정되는 가이드부재(70)는 내구성을 고려하여 복수 개로 구성하는 것이 보다 바람직한데, 다른 실시예로 나타낸 도 4와 같이 상기 가이드부재(70)에 스터드 볼트(80)를 감싸는 가이드수단(71)를 더 구비하는 것이 제1, 2 벨로우즈(20)(30)의 신축에 따라 가이드부재(70)가 스터드 볼트(80)에 보다 안정적으로 안내되어 이동하므로 바람직하다.The guide member 70 fixed to the outer circumferential surface of the cylindrical portion 40 is more preferably configured in consideration of durability, as shown in FIG. 4 shown in another embodiment, the stud bolt to the guide member 70 It is preferable to further include the guide means 71 surrounding the 80, since the guide member 70 is more reliably guided and moved to the stud bolt 80 according to the expansion and contraction of the first and second bellows 20 and 30. Do.

다른 실시예에서는 상기 가이드수단(71)을 원통형상의 실린더로 나타내었으나, 스터드 볼트(80)를 감싸는 다양한 형태로 적용 가능함은 이해 가능한 것이다.In another embodiment, the guide means 71 is shown as a cylindrical cylinder, but it is understood that it can be applied in various forms surrounding the stud bolt 80.

본 발명의 일 실시예에서는 상기 한 쌍의 플랜지(11)에 90°위상 차를 갖도록 러그(60)가 용접 고정되어 있으나, 신축이음관(10)의 크기에 따라 3 ∼ 6개 고정할 수도 있다.In one embodiment of the present invention, the lugs 60 are welded and fixed to have a 90 ° phase difference on the pair of flanges 11, but 3 to 6 can be fixed depending on the size of the telescopic joint 10. .

이러한 본 발명은 배관의 사이에 신축이음관(10)이 설치된 상태에서 배관의 내부에 압력이 작용되면 신축이음관(10)의 제1, 2 벨로우즈부(20)(30)에서 변위를 흡수하는데, 수평 변위 시에는 제1, 2 벨로우즈부(20)(30)가 신축하게 되므로 스터드 볼트(80)에 끼워진 가이드부재(70)가 스터드 볼트(80)를 따라 수평 이동하면서 변위를 흡수하게 된다.The present invention absorbs displacement in the first and second bellows portions 20 and 30 of the expansion and contraction pipe 10 when pressure is applied inside the pipe while the expansion and contraction pipe 10 is installed between the pipes. , In the horizontal displacement, the first and second bellows portions 20 and 30 expand and contract, so that the guide member 70 fitted to the stud bolt 80 horizontally moves along the stud bolt 80 to absorb displacement.

그러나 배관의 내부에 큰 압력이 작용하여 제1 벨로우즈부(20)(30)에 큰 변위가 발생되면 신축이음관(10)이 좌굴되려고 하지만, 한 쌍의 플랜지(11)에 등 간격으로 고정된 러그(60)에 스터드 볼트(80)의 양단이 각각 고정되고 스터드 볼트(80)의 중간 지점에는 원통부(40)에 용접 고정된 가이드부재(70)가 끼워져 있어 신축이음관(10)이 수평 이동하면서 변위를 흡수하게 되므로 신축이음관이 좌굴되지 않는다.However, when a large pressure is applied to the inside of the pipe and a large displacement is generated in the first bellows portions 20 and 30, the expansion and contraction pipe 10 attempts to buckle, but is fixed to the pair of flanges 11 at equal intervals. Each end of the stud bolt 80 is fixed to the lug 60, and a guide member 70 welded to the cylindrical portion 40 is fitted at an intermediate point of the stud bolt 80, so that the expansion joint 10 is horizontal. Since the displacement is absorbed while moving, the expansion joint tube does not buckle.

이때, 다른 실시예로 나타낸 도 4와 같이 가이드부재(70)에 가이드수단(71)이 더 구비되어 있으면 신축이음관(10)이 보다 안정적으로 수평 이동하면서 발생된 변위를 흡수하게 되는 것이다.At this time, when the guide member 71 is further provided in the guide member 70 as shown in FIG. 4 shown in another embodiment, the expansion and contraction pipe 10 absorbs the displacement generated while moving horizontally more stably.

이상 첨부된 도면을 참조하여 본 발명의 실시예를 설명하였지만, 본 발명이 속하는 기술분야의 통상의 지식을 가진 자는 기술적 사상이나 필수적 특징을 변경하지 않고 다른 구체적인 형태로 실시될 수 있다는 것을 이해할 수 있을 것이다.Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may understand that the present invention may be implemented in other specific forms without changing the technical spirit or essential characteristics. will be.

그러므로 이상에서 기술한 실시예는 모든 면에서 예시적인 것이며 한정적인 것이 아닌 것으로서 이해되어야 하고, 상기 상세한 설명에서 기술된 본 발명의 범위는 후술하는 특허청구범위에 의하여 나타내어지며, 특허청구범위의 의미 및 범위 그리고 그 등가개념으로부터 도출되는 모든 변경 또는 변형된 형태가 본 발명의 범위에 포함되는 것으로 해석되어야 한다.
Therefore, the embodiments described above are illustrative in all respects and should be understood as non-limiting, and the scope of the present invention described in the detailed description is indicated by the following claims, the meaning of the claims and It should be construed that all changes or modified forms derived from the scope and equivalent concept are included in the scope of the present invention.

10 : 신축이음관 20 : 제1 벨로우즈
30 : 제2 벨로우즈 40 : 원통부
60 : 러그 70 : 가이드부재
71 : 가이드수단 80 : 스터드 볼트10: expansion joint 20: the first bellows
30: second bellows 40: cylindrical portion
60: lug 70: guide member
71: guide means 80: stud bolt

Claims (5)

한 쌍의 플랜지(11)에 제1, 2 벨로우즈부(20)(30)가 용접 고정되고 상기 제1, 2 벨로우즈부(20)(30)의 사이에는 원통부(40)가 용접 고정된 LNG선박용 배관의 신축이음관 좌굴 방지장치에 있어서, 한 쌍의 플랜지(11) 외주 면에 등 간격으로 대응되게 용접 고정되고 삽입공(60a)이 형성된 복수 개의 러그(60)와, 상기 각 러그(60)에 형성된 삽입공(60a)과 동일 축선 상에 위치하는 삽입공(70a)이 형성되어 원통부(40)의 외주면에 용접 고정된 가이드부재(70)와, 상기 각 러그(60) 및 가이드부재(70)에 형성된 삽입공(60a)(70a)을 통해 끼워져 플랜지(11)에 체결부재(90)로 고정된 스터드 볼트(80)로 구성된 것을 특징으로 하는 LNG선박용 배관의 신축이음관 좌굴 방지장치.
LNG in which the first and second bellows portions 20 and 30 are welded and fixed to the pair of flanges 11, and the cylindrical portion 40 is welded and fixed between the first and second bellows portions 20 and 30. In the expansion joint pipe buckling prevention device for a ship pipe, a plurality of lugs 60, which are welded and fixed to the outer circumferential surfaces of a pair of flanges 11 at equal intervals, and are provided with insertion holes 60a, and each of the lugs 60 Insertion hole (60a) formed in) and the insertion hole (70a) located on the same axis is formed and welded and fixed to the outer peripheral surface of the cylindrical portion (40), each of the lugs (60) and the guide member An expansion joint pipe buckling prevention device for a pipe for LNG ships, characterized in that it is composed of a stud bolt (80) fixed to a flange (11) by being inserted through an insertion hole (60a) (70a) formed in (70) .
청구항 1에 있어서,
상기 삽입공(70a)이 형성된 가이드부재(70)가 복수 개로 이루어진 것을 특징으로 하는 LNG선박용 배관의 신축이음관 좌굴 방지장치.
The method according to claim 1,
A buckling preventing device for expansion and contraction of a pipe for LNG ships, characterized in that a plurality of guide members (70) having the insertion holes (70a) are formed.
청구항 1 또는 청구항 2에 있어서,
상기 가이드부재(70)에 스터드 볼트(80)를 감싸는 가이드수단(71)이 더 구비된 것을 특징으로 하는 LNG선박용 배관의 신축이음관 좌굴 방지장치.
The method according to claim 1 or claim 2,
The guide member 70, the guide means 71 for wrapping the stud bolt 80 is further provided, the buckling prevention device for the expansion joint of the LNG ship pipe.
청구항 3에 있어서,
상기 가이드수단(71)이 원통형상의 실린더인 것을 특징으로 하는 LNG선박용 배관의 신축이음관 좌굴 방지장치.
The method according to claim 3,
The guide means (71) is a cylindrical expansion cylinder pipe buckling prevention device, characterized in that the cylindrical cylinder.
청구항 1에 있어서,
상기 한 쌍의 플랜지(11)에 90°위상 차를 갖도록 러그(60)가 용접 고정된 것을 특징으로 하는 LNG선박용 배관의 신축이음관 좌굴 방지장치.The method according to claim 1,
Lug 60 is welded and fixed to have a 90 ° phase difference on the pair of flanges (11).
KR1020180127732A 2018-10-24 2018-10-24 Buckling Restraint System of Expansion Joints for LNG Shipments KR20200046502A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102261500B1 (en) 2020-11-16 2021-06-07 주식회사 태성스틸 Bellows hybrid expansion joint for pump with Double watertight structure
CN114294503A (en) * 2022-01-06 2022-04-08 南通市扬子橡塑有限公司 Corrugated pipe compensator with buffer impact protection and use method thereof
CN115095731A (en) * 2022-06-20 2022-09-23 南京晨光东螺波纹管有限公司 High-speed aerodyne expansion joint and manufacturing and assembling method thereof
CN117948479A (en) * 2024-03-26 2024-04-30 江苏成伟管件科技有限公司 Shock-resistant ripple compensator

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102261500B1 (en) 2020-11-16 2021-06-07 주식회사 태성스틸 Bellows hybrid expansion joint for pump with Double watertight structure
CN114294503A (en) * 2022-01-06 2022-04-08 南通市扬子橡塑有限公司 Corrugated pipe compensator with buffer impact protection and use method thereof
CN114294503B (en) * 2022-01-06 2023-10-31 南通市扬子橡塑有限公司 Corrugated pipe compensator with buffer impact protection and using method thereof
CN115095731A (en) * 2022-06-20 2022-09-23 南京晨光东螺波纹管有限公司 High-speed aerodyne expansion joint and manufacturing and assembling method thereof
CN115095731B (en) * 2022-06-20 2024-01-16 南京晨光东螺波纹管有限公司 High-speed galloping expansion joint and manufacturing and assembling method thereof
CN117948479A (en) * 2024-03-26 2024-04-30 江苏成伟管件科技有限公司 Shock-resistant ripple compensator

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