WO2020036288A1 - Vacuum insulating pipe having bellows provided on outer pipe - Google Patents

Vacuum insulating pipe having bellows provided on outer pipe Download PDF

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Publication number
WO2020036288A1
WO2020036288A1 PCT/KR2019/004810 KR2019004810W WO2020036288A1 WO 2020036288 A1 WO2020036288 A1 WO 2020036288A1 KR 2019004810 W KR2019004810 W KR 2019004810W WO 2020036288 A1 WO2020036288 A1 WO 2020036288A1
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Prior art keywords
pipe
bellows
vacuum insulating
vacuum insulation
liquefied gas
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PCT/KR2019/004810
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French (fr)
Korean (ko)
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신성수
정세진
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주식회사 삼진야드
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Publication of WO2020036288A1 publication Critical patent/WO2020036288A1/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
    • 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
    • F16L59/00—Thermal insulation in general
    • F16L59/06—Arrangements using an air layer or vacuum
    • F16L59/065—Arrangements using an air layer or vacuum using vacuum
    • 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
    • F16L9/00—Rigid pipes
    • F16L9/18—Double-walled pipes; Multi-channel pipes or pipe assemblies

Definitions

  • the present invention relates to a vacuum insulation pipe provided with a bellows on the exterior, and more particularly, by installing bellows, which are expansion joint pipes at regular intervals, on the exterior of the vacuum insulation pipe, ultra low temperatures such as liquid nitrogen, liquid oxygen, and liquid argon.
  • bellows which are expansion joint pipes at regular intervals
  • ultra low temperatures such as liquid nitrogen, liquid oxygen, and liquid argon.
  • the present invention relates to a vacuum insulated pipe having bellows installed on the exterior thereof, which enables to prevent the deterioration of the thermal insulation performance in advance, and facilitates the maintenance and repair work and lowers the price.
  • a double vacuum insulation pipe is used to supply cryogenic liquefied gas such as liquid nitrogen, liquid oxygen, liquid argon, and the like. And an exterior that protects the inner tube in a state surrounded by an outer side of the inner tube.
  • Korean Patent Laid-Open Publication No. 10-1999-0030718 name: welded vacuum insulation pipe, hereinafter referred to as 'prior art'
  • 'prior art' Korean Patent Laid-Open Publication No. 10-1999-0030718
  • the prior art as shown in Figure 1, consists of the inner tube (1) and the outer (2), the nozzle 3 for connecting the pipe and the pipe is installed at the tip of the inner pipe, the connection between the appearance and the exterior Flange (4), adsorbent (5) and adsorbent cylinder (6) for adsorbing degassing, and support (7) for supporting the inner tube are attached to the inner tube, and to prevent heat conduction by radiation
  • a heat insulating film 9 which is a mylar film of thin aluminum, is wound in several layers.
  • the bellows 10 is attached to the inner pipe 1 to provide thermal stress. Absorb.
  • an exhaust port 8 for exhausting the space between the inner tube 1 and the outer tube 2 in a high vacuum state is attached to the outer tank, and the exhaust port 8 leaks liquefied gas due to breakage of the inner tube 1. When it comes out, it acts as a safety valve.
  • the conventional vacuum insulation pipe applied to the transfer of such cryogenic liquefied gas blocks the heat intrusion from the outside so that the cryogenic liquefied gas can be smoothly transferred to the liquid state without vaporization.
  • the adsorbent is mounted, the insulation film is wound in several layers, and a support is installed in the inner tank to prevent the inner tube from bending.
  • the inner diameter of the bellows installed in the inner tube is the same as or slightly larger than the inner diameter of the inner tube, in which case the cryogenic liquefied gas flowing through the inner tube hits the acid and the valley of the bellows to generate turbulence and pressure loss, and when used for a long time There is a problem that can damage the bellows.
  • the present invention is to solve such a conventional problem, the purpose is to install the bellows, expansion joint pipe at regular intervals on the appearance of the vacuum insulation pipe, the cryogenic liquefied gas such as liquid nitrogen, liquid oxygen, liquid argon, etc. It is a new material that greatly improves durability such as not breaking vacuum or corroding pipes by flexibly acting on overall elongation and contraction caused by thermal stress caused by temperature difference between room temperature and ultra low temperature when flowing through. It is to provide a vacuum insulation pipe with bellows installed on the exterior.
  • Another object of the present invention is to provide a vacuum insulated pipe having bellows installed in a new appearance, which can prevent the deterioration of thermal insulation performance in advance, facilitate the maintenance and repair work, and lower the price.
  • Still another object of the present invention is to provide a vacuum insulated pipe installed with a bellows in a new appearance in which the bellows is installed in the exterior to prevent turbulence in the inner tube so that fluid flow can be smoothly made.
  • the present invention is a vacuum insulating pipe comprising an inner tube through which the cryogenic liquefied gas flows, and the outer tube is provided to be wrapped at regular intervals to protect the inner tube.
  • a plurality of bellows are installed at regular intervals to absorb thermal stress due to the temperature difference between the room temperature and the cryogenic temperature, and both ends of the bellows are formed with guide pipes having an outer diameter equal to the outer diameter of the outer diameter for welding to the exterior. Or a flange portion for flange engagement with the exterior.
  • the bellows is characterized in that it is installed at regular intervals on the appearance of the U-shaped vacuum insulation pipe to correspond to the overall elongation and contraction.
  • the cryogenic liquefied gas such as liquid nitrogen, liquid oxygen, liquid argon, etc.
  • the thermal stress generated when flowing through the inner pipe Because it flexibly responds to the overall stretching and contracting action, there is an effect that the durability is greatly improved, such as not breaking the vacuum or corrosion of the pipe.
  • the bellows since the bellows is installed on the exterior, the flow of fluid is smoothly prevented while turbulence is prevented in the inner tube, and the degradation of the thermal insulation performance due to pressure loss can be prevented in advance, and the bellows is broken or In the event of a breakdown, repairs and replacements can be made immediately from the outside, making maintenance and repair work very convenient and reducing costs.
  • FIG. 1 is a cross-sectional view showing a vacuum insulation pipe according to the prior art.
  • Figure 2 is a cross-sectional view showing a vacuum insulation pipe is installed bellows in the appearance according to the present invention.
  • Figure 3 is a perspective view showing a U-shaped vacuum insulation pipe showing a state in which the present invention is applied.
  • FIG. 4 is an image showing a state in which guide pipes or flanges are formed at both ends of the bellows in the present invention.
  • Figure 5 is a photograph showing a vacuum insulation pipe is installed bellows in the appearance according to the present invention.
  • an inner tube 110 through which cryogenic liquefied gas of liquid nitrogen, liquid oxygen, and liquid argon flows is provided, and the inner tube ( The outer side of the 110 is configured to protect the inner tube 120 is installed to be wrapped with a predetermined interval therebetween.
  • the exterior 120 has a plurality of bellows 130 for absorbing thermal stress due to the temperature difference between the room temperature and the ultra-low temperature is configured to be installed at regular intervals, the exterior 120 at both ends of the bellows 130 Guide pipe 131 having an outer diameter of the same size as the outer diameter of the outer shell 120 may be formed for the welding coupling with the.
  • both ends of the bellows 130 may be formed with a flange portion 132 for flange coupling with the exterior (120).
  • the bellows 130 may be installed at regular intervals on the exterior 120 of the U-shaped vacuum insulation pipe 140 to correspond to the overall elongation and contraction.
  • the bellows 130 is disposed at both ends of the appearance 120 corresponding to the installation position of the bellows 130.
  • the guide pipes 131 integrally extending from both ends of the guide pipe 131 are positioned so that they are exactly matched to each other by welding the connecting portions of both ends of the exterior 120 and the end of the guide pipe 131.
  • the flanges 132 formed at both ends of the bellows 130 are closely attached to each other so that the flanges on the exterior 120 are sealed as shown in FIG. 3. Screw the flange 132 in the state.
  • the bellows 130 is installed on the exterior 120 constituting the vacuum insulation pipe.
  • the bellows 130 when the bellows 130 is to be installed in the U-shaped vacuum insulation pipe 140, as shown in Figure 4, the appearance 120 is formed horizontally from both ends of the U-shaped vacuum insulation pipe 140
  • the bellows 130 is welded or flanged in a state in which the bellows 130 is accurately connected to each other, and in this state, it is possible to cope with the overall elongation and contraction very effectively.
  • the bellows 130 which is a expansion joint pipe
  • the cryogenic liquefied gas such as liquid nitrogen, liquid oxygen, and liquid argon flows through the inner pipe 110. Since it flexibly responds to the overall elongation and contraction action caused by thermal stress caused by the temperature difference between room temperature and ultra low temperature, durability is greatly improved, such as vacuum is not broken or pipes are not corroded.
  • the bellows 130 is installed on the exterior 120, the flow of the fluid is smoothly prevented while the turbulence phenomenon is prevented in the inner tube 110, and the durability of the pressure loss is reduced, and It is possible to prevent the deterioration of the thermal insulation performance in advance.
  • the bellows 130 when the bellows 130 is broken or broken, it can be repaired and replaced immediately from the outside, and thus the maintenance and repair work is very convenient and the price can be lowered.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Insulation (AREA)

Abstract

Disclosed is a novel vacuum insulating pipe having bellows provided on an outer pipe, the vacuum insulating pipe provided with bellows, which are an expansion pipe joint, at predetermined intervals on an outer pipe of the vacuum insulating pipe so as to flexibly respond to overall contraction and expansion caused by thermal stress due to a temperature difference between room temperature and an ultra-low temperature when cryogenic liquefied gas such as liquid nitrogen, liquid oxygen, and liquid argon flows through an inner pipe, thereby greatly improving durability such as that for the prevention of corrosion of a pipe or disturbances to a vacuum state, preventing, in advance, the degradation of insulation performance, facilitating maintenance and repair work, and lowering costs. In the vacuum insulating pipe of the present invention comprising the inner pipe in which the cryogenic liquefied gas flows and the outer pipe provided by a predetermined interval on the outer side of the inner pipe so to encompass the inner pipe, and thus protect the inner pipe, a plurality of bellows for absorbing thermal stress caused by a temperature difference between room temperature and an ultra-low temperature are provided at the predetermined intervals on the outer pipe, and guide pipes, which have outer diameters that are the same size as the outer diameter of the outer pipe in order to be weld-coupled to the outer pipe, or flange parts, which are to be flange-coupled to the outer pipe, are formed at both ends of the bellows.

Description

외관에 벨로우즈가 설치된 진공단열배관Vacuum insulation pipe with bellows on the exterior
본 발명은 외관에 벨로우즈가 설치된 진공단열배관에 관한 것으로, 더욱 상세하게는 진공단열배관의 외관에 일정 간격으로 신축이음관인 벨로우즈(Bellows)를 설치하여 액체질소, 액체산소, 액체알곤 등의 초저온 액화가스가 내관을 통하여 흘러갈 때 상온과 초저온의 온도차에 기인하여 발생되는 열응력으로 인한 전체적인 신장 및 수축에 유연하게 작용하도록 함으로써 진공상태가 깨지거나 파이프가 부식되지 않도록 하는 등 내구성을 크게 향상시킬 수 있도록 하고, 단열성능의 저하를 미연에 방지할 수 있도록 하는 한편, 유지 및 보수작업이 편리하도록 하고, 가격을 낮출 수 있도록 한 외관에 벨로우즈가 설치된 진공단열배관에 관한 것이다.The present invention relates to a vacuum insulation pipe provided with a bellows on the exterior, and more particularly, by installing bellows, which are expansion joint pipes at regular intervals, on the exterior of the vacuum insulation pipe, ultra low temperatures such as liquid nitrogen, liquid oxygen, and liquid argon. When the liquefied gas flows through the inner tube, it flexibly acts on the overall elongation and contraction due to the thermal stress generated by the temperature difference between the room temperature and the ultra low temperature, thereby greatly improving the durability such that the vacuum state is not broken or the pipe is not corroded. The present invention relates to a vacuum insulated pipe having bellows installed on the exterior thereof, which enables to prevent the deterioration of the thermal insulation performance in advance, and facilitates the maintenance and repair work and lowers the price.
일반적으로, 각종 산업분야에 적용되는 냉동시스템에서는 액체질소, 액체산소, 액체알곤 등의 초저온 액화가스를 공급하기 위하여 이중의 진공단열배관이 적용되는데, 이 같은 진공단열배관은 초저온 액화가스가 흐르는 내관과 상기 내관의 외측에 감싸여진 상태에서 내관을 보호하는 외관으로 구성된다. In general, in a refrigeration system applied to various industrial fields, a double vacuum insulation pipe is used to supply cryogenic liquefied gas such as liquid nitrogen, liquid oxygen, liquid argon, and the like. And an exterior that protects the inner tube in a state surrounded by an outer side of the inner tube.
한편, 상기한 진공단열배관을 통하여 초저온 액화가스가 공급되는 경우에 외부 온도 및 초저온 액화가스가 흐르는 내관 사이의 온도차에 기인하는 배관의 선 팽창계수에 의하여 배관이 신축되는 현상이 발생하게 되며, 이와 같은 배관의 신장과 수축 길이를 흡수할 수 있도록 하기 위하여 초저온 액화가스가 흐르는 내관에는 벨로우즈라 불리우는 신축이음관이 설치된다.On the other hand, when the cryogenic liquefied gas is supplied through the vacuum insulated pipe, a phenomenon in which the pipe is stretched due to the linear expansion coefficient of the pipe caused by the temperature difference between the inner pipe through which the external temperature and the cryogenic liquefied gas flows, In order to absorb the extension and contraction length of the same pipe, an expansion pipe called bellows is installed in the inner pipe through which the cryogenic liquefied gas flows.
이와 같은 초저온 액화가스를 수송하기 위한 진공단열배관의 일 예로서 대한민국 공개특허공보 공개번호 제10-1999-0030718호(명칭: 용접형 진공단열배관, 이하 '선행기술'이라 함)가 제안되었다. As an example of a vacuum insulation pipe for transporting such cryogenic liquefied gas, Korean Patent Laid-Open Publication No. 10-1999-0030718 (name: welded vacuum insulation pipe, hereinafter referred to as 'prior art') has been proposed.
상기 선행기술은 도 1에 도시된 바와 같이, 내관(1)과 외관(2)으로 이루어지고, 내관의 선단에는 배관과 배관을 연결하기 위한 노즐(3)이 설치되며, 외관과 외관과의 연결을 위한 플랜지(4), 탈가스를 흡착하기 위한 흡착제(5)와 흡착제통(6), 그리고 내관을 지지하기 위한 지지대(7)가 내관에 부착되고, 복사에 의한 열전도를 차단하기 위하여 내관의 외주면에는 알루미늄이 박막된 마일라 필름인 단열재 필름(9)이 여러 겹으로 감겨 있다. The prior art, as shown in Figure 1, consists of the inner tube (1) and the outer (2), the nozzle 3 for connecting the pipe and the pipe is installed at the tip of the inner pipe, the connection between the appearance and the exterior Flange (4), adsorbent (5) and adsorbent cylinder (6) for adsorbing degassing, and support (7) for supporting the inner tube are attached to the inner tube, and to prevent heat conduction by radiation On the outer circumferential surface, a heat insulating film 9, which is a mylar film of thin aluminum, is wound in several layers.
그리고, 배관의 길이가 매우 길거나 배관의 내경이 커서 상온과 액화가스의 초저온간의 온도차에 의한 열응력이 배관을 변형시킬 염려가 있을 경우에는 내관(1)에 벨로우즈(10)를 장착하여 열응력을 흡수한다. And, if the length of the pipe is very long or the inner diameter of the pipe is so large that the thermal stress due to the temperature difference between the room temperature and the ultra low temperature of the liquefied gas may deform the pipe, the bellows 10 is attached to the inner pipe 1 to provide thermal stress. Absorb.
또, 내관(1)과 외관(2)사이의 공간을 고진공상태로 배기하기 위한 배기구(8)가 외조에 부착되어 있으며, 상기 배기구(8)는 내관(1)의 파손에 의하여 액화가스가 새어나올 경우에 안전밸브의 역할을 한다.In addition, an exhaust port 8 for exhausting the space between the inner tube 1 and the outer tube 2 in a high vacuum state is attached to the outer tank, and the exhaust port 8 leaks liquefied gas due to breakage of the inner tube 1. When it comes out, it acts as a safety valve.
이와 같은 초저온 액화가스의 이송에 적용되는 종래의 진공단열배관은 외부로부터의 열침입을 차단하여 초저온 상태의 액화가스가 기화하지 않고 액체상태로 원활히 이송할 수 있도록 되어 있으며, 내관과 외관 사이에는 고진공 상태를 유지하기 위하여 흡착제가 장착되어 있으며, 단열재 필름이 여러겹으로 감겨져 있고, 내관이 휘어지는 것을 방지하기 위하여 내조에 지지대가 설치되어 있다.The conventional vacuum insulation pipe applied to the transfer of such cryogenic liquefied gas blocks the heat intrusion from the outside so that the cryogenic liquefied gas can be smoothly transferred to the liquid state without vaporization. In order to maintain the state, the adsorbent is mounted, the insulation film is wound in several layers, and a support is installed in the inner tank to prevent the inner tube from bending.
한편, 상기 진공단열배관을 구성하는 배관의 길이가 길거나, 내경이 크거나, 형상이 복잡한 경우에, 상온의 배관에 초저온 액화가스가 흐르게 되면 상온과 초저온의 온도차에 의한 열응력이 커서 내관에 열응력이 생기게 되며, 이를 흡수하기 위하여 내관에 벨로우즈가 설치된다.On the other hand, when the length of the pipe constituting the vacuum insulation pipe is long, the inner diameter is large, or the shape is complicated, when the cryogenic liquefied gas flows through the pipe at room temperature, the thermal stress due to the temperature difference between the room temperature and the cryogenic temperature is large, Stresses are created and bellows are installed in the inner tube to absorb them.
상기 내관에 설치되는 벨로우즈의 내경은 내관의 내경과 같거나 약간 큰 것이 사용되는데, 이 경우 내관에 흐르는 초저온 액화가스가 벨로우즈의 산과 골에 부딪침으로써 난류를 발생시켜서 압력손실이 발생되고, 장시간 사용할 경우 벨로우즈에 손상을 줄 수 있다는 문제가 있다.The inner diameter of the bellows installed in the inner tube is the same as or slightly larger than the inner diameter of the inner tube, in which case the cryogenic liquefied gas flowing through the inner tube hits the acid and the valley of the bellows to generate turbulence and pressure loss, and when used for a long time There is a problem that can damage the bellows.
이에 따라 내관에 벨로우즈가 설치되는 종래의 진공단열배관에서는 압력손실에 의하여 진공상태가 깨지는 등 내구성이 저하됨과 동시에 단열성능의 저하를 미연에 방지할 수 없다는 심각한 문제가 있다.Accordingly, there is a serious problem in the conventional vacuum insulation pipe in which the bellows is installed in the inner pipe, and the durability of the vacuum pipe is broken by the pressure loss, and at the same time, the deterioration of the thermal insulation performance cannot be prevented.
또, 벨로우즈에 문제가 발생되는 경우에 외관을 제거한 상태에서 내관에 설치된 해당 벨로우즈를 수리 또는 교체해야 하기 때문에 유지 및 보수작업이 매우 불편하다는 문제가 있고, 가격 또한 상대적으로 비싸다는 문제가 있다. In addition, when a problem occurs in the bellows, there is a problem in that maintenance and repair work are very inconvenient because the bellows installed in the inner tube needs to be repaired or replaced in the state of removing the appearance, and the price is also relatively expensive.
본 발명은 이와 같은 종래의 문제점을 해결하기 위한 것으로, 그 목적은 진공단열배관의 외관에 일정 간격으로 신축이음관인 벨로우즈를 설치하여 액체질소, 액체산소, 액체알곤 등의 초저온 액화가스가 내관을 통하여 흘러갈 때 상온과 초저온의 온도차에 기인하여 발생되는 열응력으로 인한 전체적인 신장 및 수축현상에 유연하게 작용하도록 함으로써 진공상태가 깨지거나 파이프가 부식되지 않도록 하는 등 내구성을 크게 향상시킬 수 있도록 한 새로운 외관에 벨로우즈가 설치된 진공단열배관을 제공하는 것이다.The present invention is to solve such a conventional problem, the purpose is to install the bellows, expansion joint pipe at regular intervals on the appearance of the vacuum insulation pipe, the cryogenic liquefied gas such as liquid nitrogen, liquid oxygen, liquid argon, etc. It is a new material that greatly improves durability such as not breaking vacuum or corroding pipes by flexibly acting on overall elongation and contraction caused by thermal stress caused by temperature difference between room temperature and ultra low temperature when flowing through. It is to provide a vacuum insulation pipe with bellows installed on the exterior.
본 발명의 다른 목적은 단열성능의 저하를 미연에 방지할 수 있도록 하는 한편, 유지 및 보수작업이 편리하도록 하고, 가격을 낮출 수 있도록 한 새로운 외관에 벨로우즈가 설치된 진공단열배관을 제공하는 것이다.Another object of the present invention is to provide a vacuum insulated pipe having bellows installed in a new appearance, which can prevent the deterioration of thermal insulation performance in advance, facilitate the maintenance and repair work, and lower the price.
본 발명의 또 다른 목적은 벨로우즈를 외관에 설치함으로써 내관에서의 난류현상을 방지하여 유체의 흐름이 원활하게 이루어질 수 있도록 한 새로운 외관에 벨로우즈가 설치된 진공단열배관을 제공하는 것이다. Still another object of the present invention is to provide a vacuum insulated pipe installed with a bellows in a new appearance in which the bellows is installed in the exterior to prevent turbulence in the inner tube so that fluid flow can be smoothly made.
상기의 목적을 달성하기 위하여, 본 발명은 초저온 액화가스가 흐르는 내관과, 상기 내관의 외측에 일정 간격을 두고 감싸여지게 설치되어 내관을 보호하는 외관을 포함하는 진공단열배관에 있어서, 상기 외관에는 상온과 초저온의 온도차에 기인하는 열응력을 흡수하기 위한 다수개의 벨로우즈가 일정 간격으로 설치되되, 상기 벨로우즈의 양단에는 외관과의 용접결합을 위하여 외관의 외경과 동일한 크기의 외경을 갖는 안내파이프가 형성되거나 또는 외관과의 플랜지결합을 위한 플랜지부가 형성된 특징을 갖는다.In order to achieve the above object, the present invention is a vacuum insulating pipe comprising an inner tube through which the cryogenic liquefied gas flows, and the outer tube is provided to be wrapped at regular intervals to protect the inner tube. A plurality of bellows are installed at regular intervals to absorb thermal stress due to the temperature difference between the room temperature and the cryogenic temperature, and both ends of the bellows are formed with guide pipes having an outer diameter equal to the outer diameter of the outer diameter for welding to the exterior. Or a flange portion for flange engagement with the exterior.
본 발명에서 상기 벨로우즈는 U자형 진공단열배관의 외관상에 일정 간격으로 설치되어 전체적인 신장 및 수축에 대응되도록 한 특징을 갖는다. In the present invention, the bellows is characterized in that it is installed at regular intervals on the appearance of the U-shaped vacuum insulation pipe to correspond to the overall elongation and contraction.
본 발명을 적용하면, 진공단열배관의 외관에 일정 간격으로 신축이음관인 벨로우즈가 설치됨에 따라 액체질소, 액체산소, 액체알곤 등의 초저온 액화가스가 내관을 통하여 흘러갈 때 발생되는 열응력으로 인한 전체적인 신장 및 수축작용에 유연하게 대응되기 때문에 진공상태가 깨지거나 파이프가 부식되지 않는 등 내구성이 크게 향상된다는 효과가 있다.When the present invention is applied, as bellows, which are expansion joint pipes are installed at regular intervals on the outer surface of the vacuum insulation pipe, the cryogenic liquefied gas such as liquid nitrogen, liquid oxygen, liquid argon, etc., is caused by the thermal stress generated when flowing through the inner pipe. Because it flexibly responds to the overall stretching and contracting action, there is an effect that the durability is greatly improved, such as not breaking the vacuum or corrosion of the pipe.
또, 본 발명에서는 벨로우즈가 외관에 설치되기 때문에 내관에서의 난류현상이 방지되면서 유체의 흐름이 원활하게 이루어지는 것은 물론, 압력손실에 따른 단열성능의 저하를 미연에 방지할 수 있고, 벨로우즈가 파손되거나 고장나는 경우에 외부에서 곧바로 수리 및 교체할 수 있어 유지 및 보수작업이 매우 편리하며, 가격을 낮출 수 있다는 향상된 효과가 있는 것이다.In addition, in the present invention, since the bellows is installed on the exterior, the flow of fluid is smoothly prevented while turbulence is prevented in the inner tube, and the degradation of the thermal insulation performance due to pressure loss can be prevented in advance, and the bellows is broken or In the event of a breakdown, repairs and replacements can be made immediately from the outside, making maintenance and repair work very convenient and reducing costs.
도 1은 선행기술에 따른 진공단열배관을 나타내는 단면도이다.1 is a cross-sectional view showing a vacuum insulation pipe according to the prior art.
도 2는 본 발명에 따른 외관에 벨로우즈가 설치된 진공단열배관을 나타내는 단면도이다.Figure 2 is a cross-sectional view showing a vacuum insulation pipe is installed bellows in the appearance according to the present invention.
도 3은 본 발명이 적용된 상태를 나타내는 U자형 진공단열배관을 나타내는 사시도이다.Figure 3 is a perspective view showing a U-shaped vacuum insulation pipe showing a state in which the present invention is applied.
도 4는 본 발명에서 벨로우즈의 양단에 안내파이프 또는 플랜지부가 형성된 상태를 나타내는 이미지이다.4 is an image showing a state in which guide pipes or flanges are formed at both ends of the bellows in the present invention.
도 5는 본 발명에 따른 외관에 벨로우즈가 설치된 진공단열배관을 나타내는 사진이다.Figure 5 is a photograph showing a vacuum insulation pipe is installed bellows in the appearance according to the present invention.
이하, 첨부된 도면에 의하여 본 발명의 바람직한 실사예를 보다 상세하게 설명한다.Hereinafter, preferred examples of the present invention will be described in detail with reference to the accompanying drawings.
도 2 내지 도 5을 참조하면, 본 발명에 따른 외관에 벨로우즈가 설치된 진공단열배관(100)에서는 액체질소, 액체산소, 액체알곤의 초저온 액화가스가 흐르는 내관(110)이 마련되고, 상기 내관(110)의 외측에는 내관을 보호하는 외관(120)이 일정 간격을 사이에 두고 감싸여지게 설치되도록 구성된다.2 to 5, in the vacuum insulation pipe 100 in which the bellows is installed in the appearance according to the present invention, an inner tube 110 through which cryogenic liquefied gas of liquid nitrogen, liquid oxygen, and liquid argon flows is provided, and the inner tube ( The outer side of the 110 is configured to protect the inner tube 120 is installed to be wrapped with a predetermined interval therebetween.
본 발명에서 상기 외관(120)에는 상온과 초저온의 온도차에 기인하는 열응력을 흡수하기 위한 다수개의 벨로우즈(130)가 일정 간격으로 설치되도록 구성되는데, 상기 벨로우즈(130)의 양단에는 외관(120)과의 용접결합을 위하여 외관(120)의 외경과 동일한 크기의 외경을 갖는 안내파이프(131)가 형성될 수 있다.In the present invention, the exterior 120 has a plurality of bellows 130 for absorbing thermal stress due to the temperature difference between the room temperature and the ultra-low temperature is configured to be installed at regular intervals, the exterior 120 at both ends of the bellows 130 Guide pipe 131 having an outer diameter of the same size as the outer diameter of the outer shell 120 may be formed for the welding coupling with the.
또, 상기 벨로우즈(130)의 양단에는 외관(120)과의 플랜지결합을 위한 플랜지부(132)가 형성될 수 있다.In addition, both ends of the bellows 130 may be formed with a flange portion 132 for flange coupling with the exterior (120).
한편, 본 발명에서 상기 벨로우즈(130)는 U자형 진공단열배관(140)의 외관(120)상에 일정 간격으로 설치되어 전체적인 신장 및 수축에 대응되도록 구성될 수 있다.Meanwhile, in the present invention, the bellows 130 may be installed at regular intervals on the exterior 120 of the U-shaped vacuum insulation pipe 140 to correspond to the overall elongation and contraction.
이와 같이 이루어지는 본 발명의 작용은 다음과 같다.The operation of the present invention made as described above is as follows.
본 발명에 따른 외관에 벨로우즈가 설치된 진공단열배관(100)을 구현하기 위하여, 먼저 도 5에 도시된 바와 같이, 벨로우즈(130)의 설치위치에 해당되는 외관(120)의 양단에 벨로우즈(130)의 양단으로부터 일체로 연장되는 안내파이프(131)가 정확하게 일치되도록 잇대어 위치시킨 상태에서 외관(120)의 양단과 안내파이프(131)의 끝부분의 연결부위를 용접하여 결합한다.In order to implement the vacuum insulation pipe 100 in which the bellows is installed in the appearance according to the present invention, first, as shown in FIG. 5, the bellows 130 is disposed at both ends of the appearance 120 corresponding to the installation position of the bellows 130. The guide pipes 131 integrally extending from both ends of the guide pipe 131 are positioned so that they are exactly matched to each other by welding the connecting portions of both ends of the exterior 120 and the end of the guide pipe 131.
또, 벨로우즈(130)를 외관(120)에 플랜지결합하고자 하는 경우에는 도 3에 도시된 바와 같이 벨로우즈(130)의 양단에 형성된 플랜지부(132)를 외관(120)상의 플랜지부에 실링되도록 밀착시킨 상태에서 플랜지부(132)를 나사결합한다.In addition, in the case where the bellows 130 is to be flange-coupled to the exterior 120, the flanges 132 formed at both ends of the bellows 130 are closely attached to each other so that the flanges on the exterior 120 are sealed as shown in FIG. 3. Screw the flange 132 in the state.
이와 같이 하면, 진공단열배관을 구성하는 외관(120)상에 벨로우즈(130)가 설치되는 것이다.In this way, the bellows 130 is installed on the exterior 120 constituting the vacuum insulation pipe.
한편, 상기 벨로우즈(130)를 U자형 진공단열배관(140)에 설치하고자 하는 경우에는 도 4에 도시된 바와 같이, U자형 진공단열배관(140)의 양단으로부터 수평되게 형성되는 외관(120)상에 벨로우즈(130)를 정확하게 잇대어 위치시킨 상태에서 용접하거나 플랜지결합하면 되며, 이 상태에서는 전체적인 신장 및 수축에 매우 효과적으로 대응할 수 있게 되는 것이다.On the other hand, when the bellows 130 is to be installed in the U-shaped vacuum insulation pipe 140, as shown in Figure 4, the appearance 120 is formed horizontally from both ends of the U-shaped vacuum insulation pipe 140 The bellows 130 is welded or flanged in a state in which the bellows 130 is accurately connected to each other, and in this state, it is possible to cope with the overall elongation and contraction very effectively.
이와 같은 본 발명에서는 진공단열배관의 외관(120)에 일정 간격으로 신축이음관인 벨로우즈(130)가 설치됨에 따라 액체질소, 액체산소, 액체알곤 등의 초저온 액화가스가 내관(110)을 통하여 흘러갈 때 상온과 초저온의 온도차에 기인하여 발생되는 열응력으로 인한 전체적인 신장 및 수축작용에 유연하게 대응되기 때문에 진공상태가 깨지거나 파이프가 부식되지 않는 등 내구성이 크게 향상된다.In the present invention as described above, as the bellows 130, which is a expansion joint pipe, is installed at an interval 120 in the vacuum insulation pipe, the cryogenic liquefied gas such as liquid nitrogen, liquid oxygen, and liquid argon flows through the inner pipe 110. Since it flexibly responds to the overall elongation and contraction action caused by thermal stress caused by the temperature difference between room temperature and ultra low temperature, durability is greatly improved, such as vacuum is not broken or pipes are not corroded.
또, 본 발명에서는 벨로우즈(130)가 외관(120)에 설치되기 때문에 내관(110)에서의 난류현상이 방지되면서 유체의 흐름이 원활하게 이루어지는 것은 물론, 압력손실에 따른 내구성의 저하와, 그에 따른 단열성능의 저하를 미연에 방지할 수 있게 되는 것이다.In addition, in the present invention, since the bellows 130 is installed on the exterior 120, the flow of the fluid is smoothly prevented while the turbulence phenomenon is prevented in the inner tube 110, and the durability of the pressure loss is reduced, and It is possible to prevent the deterioration of the thermal insulation performance in advance.
또, 본 발명에서는 벨로우즈(130)가 가 파손되거나 고장나는 경우에 외부에서 곧바로 수리 및 교체할 수 있어 유지 및 보수작업이 매우 편리하며, 가격을 낮출 수 있게 되는 것이다.In addition, in the present invention, when the bellows 130 is broken or broken, it can be repaired and replaced immediately from the outside, and thus the maintenance and repair work is very convenient and the price can be lowered.

Claims (2)

  1. 초저온 액화가스가 흐르는 내관(110)과, 상기 내관(110)의 외측에 일정 간격을 두고 감싸여지게 설치되어 내관(110)을 보호하는 외관(120)을 포함하는 진공단열배관에 있어서, In the vacuum insulation pipe including an inner tube 110 through which the cryogenic liquefied gas flows, and an outer shell 120 which is installed to be wrapped at a predetermined interval on the outer side of the inner tube 110 to protect the inner tube 110.
    상기 외관(120)에는 상온과 초저온의 온도차에 기인하는 열응력을 흡수하기 위한 다수개의 벨로우즈(130)가 일정 간격으로 설치되되, The exterior 120 is provided with a plurality of bellows 130 at regular intervals for absorbing the thermal stress due to the temperature difference between the room temperature and the ultra-low temperature,
    상기 벨로우즈(130)의 양단에는 외관(120)과의 용접결합을 위하여 외관(120)의 외경과 동일한 크기의 외경을 갖는 안내파이프(131)가 형성되거나 또는 외관(120)과의 플랜지결합을 위한 플랜지부(132)가 형성된 것을 특징으로 하는 외관에 벨로우즈가 설치된 진공단열배관.At both ends of the bellows 130, a guide pipe 131 having an outer diameter of the same size as the outer diameter of the outer shell 120 is formed for welding to the outer shell 120, or for flange coupling with the outer shell 120. Vacuum insulation pipe is installed bellows in the appearance, characterized in that the flange portion 132 is formed.
  2. 제1항에 있어서, The method of claim 1,
    상기 벨로우즈(130)는 U자형 진공단열배관(140)의 외관(120)상에 일정 간격으로 설치되어 전체적인 신장 및 수축에 대응되도록 한 것을 특징으로 하는 외관에 벨로우즈가 설치된 진공단열배관.The bellows 130 is installed on the exterior 120 of the U-shaped vacuum insulation pipe 140 at regular intervals, the vacuum insulation pipe with bellows installed on the exterior, characterized in that to correspond to the overall expansion and contraction.
PCT/KR2019/004810 2018-08-16 2019-04-22 Vacuum insulating pipe having bellows provided on outer pipe WO2020036288A1 (en)

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