WO2023058614A1 - 高圧水素ガス用蓄圧器 - Google Patents

高圧水素ガス用蓄圧器 Download PDF

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Publication number
WO2023058614A1
WO2023058614A1 PCT/JP2022/037016 JP2022037016W WO2023058614A1 WO 2023058614 A1 WO2023058614 A1 WO 2023058614A1 JP 2022037016 W JP2022037016 W JP 2022037016W WO 2023058614 A1 WO2023058614 A1 WO 2023058614A1
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Prior art keywords
steel
steel pipe
hydrogen gas
pressure
accumulator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
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PCT/JP2022/037016
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English (en)
French (fr)
Japanese (ja)
Inventor
周作 ▲高▼木
拓史 岡野
信行 石川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
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JFE Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JFE Steel Corp filed Critical JFE Steel Corp
Priority to US18/688,357 priority Critical patent/US20250116374A1/en
Priority to JP2023504867A priority patent/JP7548410B2/ja
Priority to KR1020247010176A priority patent/KR20240051217A/ko
Priority to EP22878483.1A priority patent/EP4400747A4/en
Priority to AU2022359109A priority patent/AU2022359109B2/en
Priority to CN202280061589.9A priority patent/CN117957389A/zh
Publication of WO2023058614A1 publication Critical patent/WO2023058614A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
    • F16L15/04—Screw-threaded joints; Forms of screw-threads for such joints with additional sealings
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    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/14—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge constructed of aluminium; constructed of non-magnetic steel
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    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/002—Details of vessels or of the filling or discharging of vessels for vessels under pressure
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    • F17C2209/228—Assembling processes by screws, bolts or rivets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/23—Manufacturing of particular parts or at special locations
    • F17C2209/234—Manufacturing of particular parts or at special locations of closing end pieces, e.g. caps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/012—Hydrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0107—Single phase
    • F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/035—High pressure (>10 bar)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/036—Very high pressure (>80 bar)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0134—Applications for fluid transport or storage placed above the ground
    • F17C2270/0139—Fuel stations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/32—Hydrogen storage

Definitions

  • the present invention relates to a high-pressure hydrogen gas pressure accumulator, and more particularly to a high-pressure hydrogen gas pressure accumulator capable of storing a large amount of hydrogen.
  • Another method for storing large amounts of hydrogen is to compress and store gaseous hydrogen.
  • hydrogen gas has been stored in cylinders at a pressure of about 15 MPa.
  • efforts are being made to store hydrogen gas at a high pressure of 40 MPa or more at hydrogen stations and the like.
  • Type 1 container made entirely of metal
  • Type 2 container in which the outer circumference of the metal liner (only the cylindrical portion) is hoop-wrapped with FRP (fiber-reinforced plastic)
  • FRP fiber-reinforced plastic
  • Type 3 container in which the entirety including the dome part
  • Type 4 container in which the outer circumference of the non-metallic liner (entirely including the mirror part) is fully wrapped with FRP
  • Patent Document 1 discloses a container using a straight-shaped steel container.
  • Patent Document 2 discloses a container in which the outer periphery of a Cr--Mo steel liner is coated with FRP.
  • Non-Patent Document 1 discloses a container in which the outer periphery of an aluminum liner is coated with FRP.
  • Patent Document 3 discloses a container in which the outer periphery of a resin liner is coated with FRP.
  • each type of pressure accumulator has a length of several meters and a diameter of several tens of centimeters, and the volume per pressure accumulator is limited to about 300L. had been Therefore, in order to increase the amount of hydrogen gas stored in a hydrogen station or the like, it has been necessary to increase the number of installed pressure accumulators.
  • each pressure accumulator requires a valve, a support stand, and the like. Therefore, an increase in the number of installed pressure accumulators leads to an increase in facility costs, which can be said to be inefficient.
  • the present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a pressure accumulator for high-pressure hydrogen gas that is capable of storing a large amount of hydrogen in a single unit despite being easy to manufacture, transport, and install. With the goal.
  • the present invention was made to solve the above problems, and the gist and configuration are as follows.
  • a high-pressure hydrogen accumulator comprising a steel vessel, A pressure accumulator for high-pressure hydrogen gas, wherein the steel container is composed of two or more steel pipes connected by screws.
  • the steel pipe in mass%, C: 0.005 to 0.60%, Si: 0.001 to 2.0%, Mn: 0.01 to 5.0%, P: 0.0001 to 0.060%, S: 0.00001 to 0.010%, N: 0.00001 to 0.010%, Al: 0.0001 to 1.00%, O: 0.010% or less, and H: 0 to 0.0010%, 5.
  • the pressure accumulator for high-pressure hydrogen gas according to any one of 1 to 4 above, which has a component composition in which the balance is Fe and unavoidable impurities.
  • the component composition in mass%, Mo: 0.0001 to 5.0%, Cr: 0.0001 to 5.0%, Ni: 0.0001 to 5.0%, Cu: 0.0001 to 5.0%, Co: 0.0001 to 5.0%, B: 0.0001 to 0.01%, V: 0.0001 to 1.0%, W: 0.0001 to 5.0%, Nb: 0.0001 to 0.1%, Ti: 0.0001 to 0.1%, Zr: 0.0001 to 0.2%, Hf: 0.0001 to 0.2%, Ta: 0.0001 to 0.2%, Sb: 0.0001 to 0.2%, Sn: 0.0001 to 0.2%, Ca: 0.0001 to 0.01%, 6.
  • the pressure accumulator for high-pressure hydrogen gas according to 5 above, further containing at least one selected from the group consisting of Mg: 0.0001 to 0.01% and REM: 0.0001 to 0.5%.
  • the area fraction of retained austenite in the structure of the steel pipe is 0 to 3%, 7.
  • the high-pressure hydrogen gas accumulator of the present invention a steel container is constructed by connecting a plurality of steel pipes with screws. Therefore, it is possible to manufacture and transport steel pipes that are smaller than the size of the entire pressure accumulator and connect them at the installation site to complete the work. Therefore, the high-pressure hydrogen gas accumulator of the present invention is excellent in productivity and transportability. In addition, since the capacity can be freely changed by changing the number of steel pipes to be connected, it is possible to easily realize the optimum hydrogen storage amount according to the installation location. Therefore, the high-pressure hydrogen gas accumulator of the present invention can be suitably used not only in hydrogen stations but also in various places where hydrogen storage is required, such as offshore wind power generation, mountainous areas, ships, and harbors.
  • FIG. 2 is a schematic cross-sectional view showing the structure of a joint portion of the high-pressure hydrogen gas accumulator according to the first embodiment of the present invention.
  • FIG. 6 is a schematic cross-sectional view showing the structure of a joint portion of a high-pressure hydrogen gas accumulator according to a second embodiment of the present invention.
  • FIG. 6 is a schematic cross-sectional view showing an example of the structure when an O-ring is used in the second embodiment;
  • FIG. 10 is a schematic cross-sectional view showing the structure of a connecting portion of a high-pressure hydrogen gas accumulator according to a third embodiment of the present invention;
  • FIG. 12 is a schematic cross-sectional view showing an example of the structure when an O-ring is used in the third embodiment;
  • FIG. 10 is a schematic cross-sectional view showing the structure of a connecting portion of a high-pressure hydrogen gas accumulator according to a fourth embodiment of the present invention
  • FIG. 11 is a schematic cross-sectional view showing an example of a structure when a leak port is provided in a fourth embodiment of the present invention
  • BRIEF DESCRIPTION OF THE DRAWINGS It is a cross-sectional schematic diagram which shows the structure of the accumulator for high pressure hydrogen gas in the 1st Embodiment of this invention.
  • the pressure accumulator of the present invention is a pressure accumulator for high-pressure hydrogen gas and includes a steel container.
  • the high-pressure hydrogen gas pressure accumulator can be used, for example, as a hydrogen station pressure accumulator, but is not limited thereto and can be used for any purpose.
  • the high-pressure hydrogen gas accumulator of the present invention may be composed only of a steel container, and has a carbon fiber reinforced resin (CFRP) layer described later on at least a part of the surface of the steel container. good too.
  • CFRP carbon fiber reinforced resin
  • Step container In the present invention, it is important that the steel container is composed of two or more steel pipes connected by screws. Therefore, the steel container does not have a welded portion at the joining portion between the steel pipes. The main effects will be described below.
  • the high-pressure hydrogen gas accumulator of the present invention can be manufactured and transported in a state of being divided into a plurality of steel pipes, and assembled into a predetermined size at the installation site. Therefore, even a large-capacity pressure accumulator can be easily manufactured and transported. Also, a pressure accumulator with a desired capacity can be obtained simply by changing the number of steel pipes to be connected.
  • Welding is generally used as a method for connecting multiple steel pipes.
  • the weld structure is a structure altered by the heat during welding, and is inferior in toughness to the base material.
  • welding is performed at the installation site, it is difficult to precisely control the welding conditions, so it is difficult to ensure the welding quality. Therefore, when the steel pipes are joined by welding, when filled with high-pressure hydrogen gas, there is a risk that the joints between the steel pipes may break.
  • the material of the steel pipe is not particularly limited and any steel can be used, but from the viewpoint of cost reduction, it is preferable to use a steel pipe made of low alloy steel.
  • C 0.005 to 0.60%, Si: 0.001 to 2.0%, Mn: 0.01 to 5.0%, P: 0.0001 to 0.060%, S: 0.00001 to 0.010%, N: 0.00001 to 0.010%, Al: 0.0001 to 1.00%, O: 0.010% or less, and H: 0 to 0.0010%, It is preferable to use a steel pipe having a chemical composition consisting of the balance Fe and unavoidable impurities.
  • H is an element that may be contained in steel depending on manufacturing conditions. However, from the viewpoint of further improving the fracture toughness, it is preferable that the H content is small, and specifically, it is preferably 0.0010% or less. Since the lower the H content, the better, the lower limit of the H content may be 0%.
  • the component composition is in mass %, Mo: 0.0001 to 5.0%, Cr: 0.0001 to 5.0%, Ni: 0.0001 to 5.0%, Cu: 0.0001 to 5.0%, Co: 0.0001 to 5.0%, B: 0.0001 to 0.01%, V: 0.0001 to 1.0%, W: 0.0001 to 5.0%, Nb: 0.0001 to 0.1%, Ti: 0.0001 to 0.1%, Zr: 0.0001 to 0.2%, Hf: 0.0001 to 0.2%, Ta: 0.0001 to 0.2%, Sb: 0.0001 to 0.2%, Sn: 0.0001 to 0.2%, Ca: 0.0001 to 0.01%, At least one selected from the group consisting of Mg: 0.0001 to 0.01% and REM: 0.0001 to 0.5% may be further included.
  • each of the two or more steel pipes may be the same or different. However, from the viewpoint of preventing corrosion due to the potential difference between the steel pipes, it is preferable that all the steel pipes constituting the steel container have the same chemical composition.
  • the structure of the steel pipe is also not particularly limited, and a steel pipe having any structure can be used. From the viewpoint of reducing the growth rate of fatigue cracks and improving hydrogen gas resistance, the area fraction of retained austenite is 0 to 3%, the aspect ratio is 2.0 or more and the major axis is 10 ⁇ m or more. It is preferable to use a steel pipe having a structure with a number density of 10 pieces/100 mm 2 or less. Although the lower limit of the number density is not particularly limited, it may be 0/100 mm 2 .
  • the "structure” in the disclosure of this specification refers to the structure at the center in the longitudinal direction of the steel pipe and at the inner wall thickness 1/4 position. That is, the area fraction of each structure is the area fraction of the structure at the center of the steel pipe in the longitudinal direction and at the inner wall thickness 1/4 position. Similarly, the number density of the inclusions is the number density at the center of the steel pipe in the longitudinal direction and at the inner wall thickness 1/4 position.
  • the area fraction of retained austenite can be measured by X-ray diffraction.
  • a test piece is sampled from the center in the longitudinal direction of the steel pipe at the inner wall thickness 1/4 position, and the cut surface of the test piece is chemically polished before the measurement.
  • a Co-K ⁇ ray source is used as the incident X-ray, and the residual Calculate the area fraction of austenite.
  • the number density of inclusions can be obtained by observation using an optical microscope.
  • a test piece for measuring inclusions is taken from the center in the longitudinal direction of the steel pipe, at the inner wall thickness 1/4 position. The dimensions of the test piece are 20 mm in the length direction, 5 mm in the width direction, and 15 mm in the thickness direction.
  • the test piece is embedded in resin so that the surface (L section) consisting of the longitudinal direction and the thickness direction with respect to the rolling direction of the steel pipe becomes the observation surface, and the surface is mirror-polished.
  • the mirror-polished surface is observed with an optical microscope, and the number of inclusions having an aspect ratio of 2.0 or more and a length of 10 ⁇ m or more in an area of 10 mm ⁇ 10 mm is measured.
  • the number density is calculated by dividing the obtained number of inclusions by the area (100 mm 2 ) of the region.
  • Ten specimens for measurement of inclusions are sampled from each steel pipe to be measured, and the number density of the ten specimens is arithmetically averaged to determine the number density of inclusions in the steel pipe.
  • the aspect ratio and major diameter of inclusions are obtained in accordance with the standard of JIS G0555:2020 (microscopic test method for non-metallic inclusions in steel).
  • the total area fraction of martensite and bainite in the steel pipe structure is preferably 80% or more, and more preferably 80% or more.
  • the upper limit of the total area fraction of martensite and bainite is not particularly limited, it may be 100%.
  • the upper limit of the area fraction of martensite is not particularly limited, it may be 100%.
  • the area fraction of ferrite is preferably 5% or less.
  • the lower limit of the area fraction of ferrite is not particularly limited, it may be 0%.
  • martensite is defined as including tempered martensite.
  • the area fractions of martensite, bainite, and ferrite can be obtained by photographing a structure photograph by microscopic observation and analyzing the image of the structure photograph. Either an optical microscope or a scanning electron microscope can be used for the microscopic observation, and the observation can be performed at an appropriate magnification between 100 and 5000 times.
  • the test piece used for the microscopic observation is taken so that the observation position is at the center in the longitudinal direction of the steel pipe, the inner wall thickness 1/4 position.
  • the section of the sampled test piece is etched with a 3 vol % nital solution to expose the microstructure, and then the microscopic observation is performed. Identification of each tissue in the tissue photograph can be performed, for example, by comparing the tissue in each part of the tissue photograph with the tissue photograph recorded in Non-Patent Document 2.
  • each of the two or more steel pipes may be the same or different, but it is preferable that they have the same structure.
  • the tensile strength (TS) of each of the two or more steel pipes is preferably 1100 MPa or less, more preferably 950 MPa or less.
  • the lower limit of the tensile strength is also not limited, but if the tensile strength is low, it is necessary to increase the wall thickness of the steel pipe in order to ensure the strength required for the pressure accumulator, which leads to an increase in cost. . Therefore, the tensile strength of each of the two or more steel pipes is preferably 800 MPa or more.
  • the steel pipe is not particularly limited, and one manufactured by any method can be used.
  • it may be an electric resistance welded pipe, a spiral steel pipe, a UOE steel pipe, a steel pipe shape obtained by hollowing out the inside of a steel material by machining or the like, or a steel pipe shape manufactured by forging, or a heated billet.
  • It may be a seamless steel pipe obtained by rolling and forming a steel pipe shape.
  • welding quality becomes a problem.
  • welding for manufacturing steel pipes is generally performed under strictly controlled conditions in factories such as steel mills, so that the welding quality is high.
  • post-weld heat treatment or the like is performed to improve the mechanical properties of the welded portion, if necessary. Therefore, compared to the welded portion where the steel pipes are welded together on site, the welded portion of the ordinary steel pipe itself is less likely to cause breakage. Therefore, it is possible to use steel pipes manufactured using welding, such as electric resistance welded pipes, spiral steel pipes, and UOE steel pipes.
  • seamless steel pipe As the steel pipe from the viewpoint of further reducing the risk of breakage and enabling use at higher pressures. Since seamless steel pipes have no welded joints, the properties of the base material are uniform throughout the steel pipes. In addition, compared to steel pipes manufactured by hollowing out or forging, seamless steel pipes are less expensive and have superior properties such as toughness. It is particularly suitable.
  • the length of each steel pipe is not particularly limited, and can be any length. However, if the length of the steel pipe is excessively short, the number of joints per pressure accumulator increases, resulting in an increase in cost. Therefore, the length of each of the two or more steel pipes is preferably 3 m or longer, more preferably 5 m or longer. On the other hand, if the individual steel pipes are long, the number of joints can be reduced and there is a possibility of cost reduction.
  • the length of each of the two or more steel pipes is preferably 100 m or less, more preferably 12 m or less, which is transportable by vehicle, and even more preferably 6 m or less.
  • any volume can be secured by connecting the number of steel pipes according to the space of the installation location without being subject to manufacturing and transportation restrictions. be able to. Therefore, the number of steel pipes forming one steel container is not particularly limited, and may be any number of two or more.
  • a pressure accumulator having a length of several tens to several hundred meters can be configured by connecting several tens to hundreds of steel pipes. Also, a large number of steel pipes exceeding several hundred can be joined together to form an ultra-large-capacity pressure accumulator.
  • the upper limit of the number of steel pipes is not limited, and the number can be arbitrarily supplemented according to the space of the installation place.
  • the number of steel pipes may be 1000 or less, 500 or less, 200 or less, or 100 or less.
  • joining portion the structure of the portion where the steel pipes are joined together by screws
  • shape of the screw is not particularly limited, and any shape can be used as long as it can support the necessary stress.
  • the central axes of the steel pipes constituting the steel container are coaxially arranged.
  • the central axes of the respective steel pipes it is possible to more easily connect with a screw structure.
  • the deviation of the central axis of the steel pipes forming the steel container is preferably 5 mm or less, more preferably 1 mm or less.
  • the deviation of the central axis of the steel pipes constituting the steel container means the maximum deviation between the central axis of each steel pipe included in the steel container and the central axis of the steel pipe adjacent to the steel pipe. defined as a value.
  • a sealing member at the connecting portion.
  • Said sealing member can typically be arranged between two adjacent steel pipes.
  • a sealing member between the steel pipe and the coupling adjacent to the steel pipe.
  • the sealing member is not particularly limited, and any sealing member such as a gasket, packing, or O-ring can be used.
  • the material of the sealing member is not particularly limited, and any material such as metal or resin can be used. From the viewpoint of improving the sealing property, it is preferable to use resin, copper, or the like, which can be deformed to improve the sealing property when the screw is tightened.
  • double-arrange the sealing members means that two seal members are arranged between the steel pipe and the member adjacent to the steel pipe (other steel pipe or coupling).
  • the sealing member closer to the inside of the steel container than the threaded portion.
  • the threaded portion can be prevented from coming into contact with hydrogen gas.
  • hydrogen embrittlement of the threaded portion can be suppressed, so that the risk of fracture of the steel container can be reduced.
  • the steel container can be provided with lids on both ends. Any lid can be used as the lid as long as it can seal the steel container.
  • the material of the lid is not particularly limited, it is generally preferable to use a steel lid.
  • said lid is a screw-on lid.
  • FIG. 1 is a schematic cross-sectional view showing the structure of the connecting portion of the high-pressure hydrogen gas pressure vessel 1 according to the first embodiment of the present invention.
  • the steel container of the high-pressure hydrogen gas accumulator in this embodiment is composed of a plurality of steel pipes 10, and the steel pipes adjacent to each other are joined together by screws having the structure shown in FIG.
  • first steel pipe 10a is formed with a female threaded portion 11a
  • second steel pipe 10b is provided with a male thread that is screwed with the female threaded portion 11a of the first steel pipe 10a.
  • a portion 12b is provided.
  • the first steel pipe 10a and the second steel pipe 10b are connected by screwing together the female threaded portion 11a of the first steel pipe 10a and the male threaded portion 12b of the second steel pipe 10b.
  • the seal portion When arranging the seal portion, it is preferable to install it at a position further to the left of the leftmost screw portion of the female screw portion 11a, that is, at a position where hydrogen gas can be prevented from reaching the screw portion (the second sealing portion to be described later). 2 embodiment, see FIG. 3).
  • the steel container can be provided with lids on both ends. Any lid can be used as the lid as long as it can seal the steel container.
  • a screw-on lid 50 can be provided at the end of the steel container. It should be noted that the lid can be similarly provided in other embodiments described later.
  • the steel container shown in FIG. 8 is composed of two steel pipes connected by screws, the number of steel pipes may be any number of two or more.
  • FIG. 2 is a schematic cross-sectional view showing the structure of the connecting portion of the high-pressure hydrogen gas accumulator 1 according to the second embodiment of the present invention.
  • the steel container of the high-pressure hydrogen gas accumulator in this embodiment is composed of a plurality of steel pipes 10, and the steel pipes adjacent to each other are connected by couplings 20 provided inside the steel pipes as shown in FIG. are connected using
  • one end of the first steel pipe 10a is formed with a female threaded portion 11a
  • one end of the coupling 20 is provided with a male threaded portion 22 that is screwed with the female threaded portion 11a of the first steel pipe 10a.
  • One end of the second steel pipe 10b is formed with a female threaded portion 11b
  • the other end of the coupling 20 is provided with a male threaded portion 22 that screws together with the female threaded portion 11b of the second steel pipe 10b.
  • the female threaded portion 11a of the first steel pipe 10a and the male threaded portion 22 at one end of the coupling 20 the female threaded portion 11b of the second steel pipe 10b and the male threaded portion 22 at the other end of the coupling 20
  • the first steel pipe 10a and the second steel pipe 10b are connected via the coupling 20 by screwing them together.
  • an O-ring 30 as a sealing member between the steel pipe 10 and the coupling 20.
  • leakage of hydrogen gas can be prevented more reliably.
  • FIGS. 2 and 3 show a case in which the inner diameter of the coupling 20 and the inner diameter of the steel pipe 10 are the same, the inner diameter of the coupling 20 and the inner diameter of the steel pipe 10 may be different. Moreover, although the first steel pipe 10a and the second steel pipe 10b are in contact with each other in the examples shown in FIGS.
  • FIG. 4 is a schematic cross-sectional view showing the structure of the connecting portion of the high-pressure hydrogen gas accumulator 1 according to the third embodiment of the present invention.
  • the steel container of the accumulator for high-pressure hydrogen gas in this embodiment is composed of a plurality of steel pipes 10, and the steel pipes adjacent to each other are connected by couplings 20 provided inside the steel pipes as shown in FIG. are connected using
  • a male threaded portion 12a is formed at one end of the first steel pipe 10a, and a female threaded portion 21 screwed with the male threaded portion 12a of the first steel pipe 10a is formed at one end of the coupling 20.
  • a male threaded portion 12b is formed at one end of the second steel pipe 10b, and a female threaded portion 21 screwed to the male threaded portion 12b of the second steel pipe 10b is formed at the other end of the coupling 20. is provided.
  • the male threaded portion 12a of the first steel pipe 10a and the female threaded portion 21 at one end of the coupling 20 the male threaded portion 12b of the second steel pipe 10b and the female threaded portion 21 at the other end of the coupling 20
  • the first steel pipe 10a and the second steel pipe 10b are connected via the coupling 20 by screwing them together.
  • an O-ring 30 as a sealing member between the steel pipe 10 and the coupling 20.
  • the contact portion in addition to between the first steel pipe 10a and the coupling 20, between the second steel pipe 10b and the coupling 20, between the first steel pipe 10a and the second steel pipe 10b ( The contact portion) is also provided with an O-ring.
  • FIGS. 4 and 5 show a case in which the inner diameter of the coupling 20 and the inner diameter of the steel pipe 10 are the same, but the inner diameter of the coupling 20 and the inner diameter of the steel pipe 10 may be different. Also, in the examples shown in FIGS. 4 and 5, the first steel pipe 10a and the second steel pipe 10b are in contact with each other, but they may be separated as described in the following fourth embodiment. .
  • FIG. 6 is a schematic cross-sectional view showing the structure of the connecting portion of the high-pressure hydrogen gas accumulator 1 according to the fourth embodiment of the present invention.
  • the steel pipes adjacent to each other are joined together using a coupling 20 provided inside the steel pipes, as in the third embodiment.
  • the tip of the first steel pipe 10a and the tip of the second steel pipe 10b are in contact with each other in the third embodiment, in the present embodiment, the tip of the first steel pipe 10a and the second steel pipe The tip of 10b does not touch directly.
  • Other points can be the same as those of the third embodiment.
  • a hydrogen gas leak can be detected by placing a hydrogen detector in front of the leak port.
  • the position of installing the leak port is not particularly limited, but it is installed either or both between the end of the coupling and the thread closest to the end and between the sealing member and the thread closest to the sealing member. is preferred.
  • FIG. 7 shows an example of arrangement when the leak port 40 is provided.
  • a hydrogen detector (not shown) or the like can be connected to the leak port 40 .
  • a leak port can also be provided when steel pipes are directly connected with screws as shown in Fig. 1, or when a coupling provided inside the steel pipes is used as shown in Figs. However, in that case, it is necessary to provide a leak port in the steel pipe. On the other hand, as shown in FIG. 7, when a coupling provided outside the steel pipe is used, it is sufficient to provide a leak port in the coupling, which facilitates manufacturing.
  • a to F of the joining method shown in Table 1 represent the following structures, respectively.
  • the structures of A to E were as shown in FIGS. 1 to 5, respectively.
  • As the O-ring a resin-made one was used.
  • F Welding
  • lids having a thickness of 110 mm and having the same screw shape as the joint.
  • the material of the lid is TS (tensile strength): SNCM439 steel of 900 MPa class, and the SNCM439 steel is forged into a lid shape. Hydrogen gas was introduced by opening a hole in the center of the lid and connecting a pipe.
  • the lid may have a structure including two of a lid without a screw structure and a threaded member for supporting the lid.
  • SCM435 and SNCM439 steels were adjusted to TS800-900 MPa by quenching and tempering. Also, X52 and X65 were manufactured by hot rolling.
  • the area fractions of martensite (M), bainite (B), retained austenite (RA), and ferrite in each steel pipe were measured by the method described above.
  • the number density of inclusions having an aspect ratio of 2.0 or more and a major diameter of 10 ⁇ m or more was also measured by the method described above.
  • For the measurement of the area fraction and number density of inclusions a test piece taken from the center of the steel pipe in the longitudinal direction and from the inner wall thickness 1/4 position was used. The measurement results are also shown in Table 1.
  • Boost test Using the obtained steel container, a high-pressure hydrogen gas accumulator was fabricated, and the inside was actually filled with pure hydrogen, and hydrogen leakage from screw joints or welds was confirmed. Specifically, hydrogen gas was pressurized to a predetermined pressure by a compressor, and filled into the high-pressure hydrogen gas accumulator. This state was maintained for 10 minutes, and it was tested whether or not hydrogen gas leakage occurred. The test was repeated while increasing the pressure in increments of 5 MPa up to a maximum of 50 MPa, and the maximum pressure at which no leakage occurred was determined. The evaluation results are also shown in Table 1.
  • the toughness of the joint in hydrogen gas was evaluated according to ASTM-E1820. Specifically, from the joint (weld metal and HAZ (heat affected zone) for steel containers joined by welding), three A test piece was taken and the fracture toughness was measured. In addition, the test method may be evaluated by a method according to ASME E1681 or ASTM E399. The test environment was pure hydrogen at 21 MPa. When the average fracture toughness value of the three test pieces was higher than 52 MPa ⁇ m 1/2 , it was judged to be good, and when it was 52 MPa ⁇ m 1/2 or less, it was judged to be bad. The evaluation results are also shown in Table 1.
  • the pressure accumulator for high-pressure hydrogen gas that satisfies the conditions of the present invention has a maximum pressure of 15 MPa or more at which leakage does not occur, and the toughness of the joint in hydrogen gas is also good.
  • rice field On the other hand, in the welded pressure accumulator, the maximum pressure at which no leakage occurred was 10 MPa. In addition, the toughness of the joint in hydrogen gas was also poor.
  • the present invention by connecting steel pipes that are easy to produce and transport, it is possible to easily create a large-capacity pressure accumulator that can stably store high-pressure hydrogen gas.
  • two steel pipes were used to form the steel container, but even if three or more pipes are used, the load applied to each connecting portion is basically the same as long as the pressure is the same.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Gasket Seals (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
PCT/JP2022/037016 2021-10-04 2022-10-03 高圧水素ガス用蓄圧器 Ceased WO2023058614A1 (ja)

Priority Applications (6)

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US18/688,357 US20250116374A1 (en) 2021-10-04 2022-10-03 Pressure vessel for high-pressure hydrogen gas
JP2023504867A JP7548410B2 (ja) 2021-10-04 2022-10-03 高圧水素ガス用蓄圧器
KR1020247010176A KR20240051217A (ko) 2021-10-04 2022-10-03 고압 수소 가스용 축압기
EP22878483.1A EP4400747A4 (en) 2021-10-04 2022-10-03 ACCUMULATOR FOR HIGH-PRESSURE HYDROGEN GAS
AU2022359109A AU2022359109B2 (en) 2021-10-04 2022-10-03 Pressure Vessel for High-Pressure Hydrogen Gas
CN202280061589.9A CN117957389A (zh) 2021-10-04 2022-10-03 高压氢气用蓄压器

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JP2021163676 2021-10-04

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WO2025164294A1 (ja) * 2024-02-01 2025-08-07 Ｊｆｅスチール株式会社 水素ガス蓄圧器用鋼管、水素ガス蓄圧器及び水素ガス蓄圧器用鋼管の製造方法

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CL2024000942A1 (es) 2024-09-13
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KR20240051217A (ko) 2024-04-19
CN117957389A (zh) 2024-04-30
JP7548410B2 (ja) 2024-09-10
AU2022359109B2 (en) 2025-06-05
AU2022359109A1 (en) 2024-03-14
EP4400747A4 (en) 2025-11-26

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