WO2020100800A1 - 高圧水素容器 - Google Patents
高圧水素容器 Download PDFInfo
- Publication number
- WO2020100800A1 WO2020100800A1 PCT/JP2019/044094 JP2019044094W WO2020100800A1 WO 2020100800 A1 WO2020100800 A1 WO 2020100800A1 JP 2019044094 W JP2019044094 W JP 2019044094W WO 2020100800 A1 WO2020100800 A1 WO 2020100800A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pressure hydrogen
- cylinder
- outer cylinder
- hydrogen container
- lid member
- Prior art date
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/063—Arrangement of tanks
- B60K15/067—Mounting of tanks
- B60K15/07—Mounting of tanks of gas tanks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
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- F17C1/04—Protecting sheathings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
- F17C1/005—Storage of gas or gaseous mixture at high pressure and at high density condition, e.g. in the single state phase
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- B60K15/03—Fuel tanks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
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- B66F9/07513—Details concerning the chassis
- B66F9/07518—Fuel or oil tank arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
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- F16J—PISTONS; CYLINDERS; SEALINGS
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- F17C2270/01—Applications for fluid transport or storage
- F17C2270/0165—Applications for fluid transport or storage on the road
- F17C2270/0168—Applications for fluid transport or storage on the road by vehicles
-
- 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
- F17C2270/0165—Applications for fluid transport or storage on the road
- F17C2270/0184—Fuel cells
-
- 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 container that stores high-pressure hydrogen.
- a fuel cell type transportation vehicle has disclosed a technique of using a high-pressure hydrogen container in which a high-pressure hydrogen inlet / outlet is provided at a dome-shaped top formed at one end of a cylindrical portion (see, for example, Patent Document 1). .
- Patent Document 1 there is a repeated pressure cycle of high-pressure hydrogen that is assumed during the use of the high-pressure hydrogen container mounted on the transportation vehicle, so that the trunk portion is thickened so as to reduce the stress level. A cylindrical portion is used, and a dome-shaped portion is formed at one end of the cylindrical portion. Therefore, there is a problem that it takes time and effort to manufacture a safe high-pressure hydrogen container, and the manufacturing cost increases.
- the present invention is intended to solve the above problems, and an object of the present invention is to provide a safe high-pressure hydrogen container that has a simple structure, does not require manufacturing, and can reduce manufacturing costs.
- the high-pressure hydrogen container of the present invention A metal cylinder for the storage of high pressure hydrogen, A lid member that covers both ends of the metal cylinder, An outer cylinder surrounding the outer periphery of the cylindrical portion of the metal cylinder, A fastening member that fixes the lid member and the outer cylinder, Equipped with.
- a bolt is used as the fastening member.
- the bolt is inserted into the outer cylinder from the lid member, A recess for accommodating the head of the bolt is formed in the lid member.
- a gap is formed between the outer circumference of the metal cylinder and the inner circumference of the outer cylinder to separate the metal cylinder from the outer cylinder.
- a flow path is formed in the outer cylinder, the flow path communicating from the gap to the outside on the outer peripheral side.
- the high-pressure hydrogen container according to any one of [1] to [5] It has a first fitting structure for fitting the metal cylinder and the lid member.
- a seal member is provided between the lid member and the metal cylinder on the inner diameter side of the first fitting structure.
- the lid member is fixed to the outer cylinder by the fastening member. Therefore, the high-pressure hydrogen container can be manufactured by fixing a lid member that covers both end portions of the metal cylinder to the outer cylinder that surrounds the outer periphery of the cylindrical portion of the metal cylinder with fastening members. Therefore, it is possible to provide a safe high-pressure hydrogen container which has a simple structure, does not require manufacturing, and can reduce manufacturing cost.
- FIG. 3 is an enlarged view showing a part of the high-pressure hydrogen container according to the embodiment of the present invention by enlarging part A of FIG. 2. It is explanatory drawing which shows the high pressure hydrogen container which concerns on the modification 1 of embodiment of this invention in the cross section showing the cylinder extending direction of a metal cylinder and an outer cylinder. It is a side view which shows the high pressure hydrogen container which concerns on the modification 1 of embodiment of this invention from the direction of the arrow B of FIG.
- FIG. 1 is a schematic configuration diagram showing a forklift 100 according to an embodiment of the present invention.
- the forklift 100 shown in FIG. 1 is a fuel cell type transportation vehicle.
- the forklift 100 includes a cargo handling device 102 at the front of a vehicle body 101.
- the forklift 100 includes a driver's seat 103 at the center of a vehicle body 101.
- the forklift 100 includes a fuel cell 104 below the driver's seat 103.
- the fuel cell 104 includes a power generation unit 105 and the high pressure hydrogen container 1.
- the power generation unit 105 chemically reacts oxygen in the air with hydrogen supplied from the high-pressure hydrogen container 1 to generate electric power.
- the forklift 100 is provided with a pair of front wheels 106 that are drive wheels at the front of the vehicle body 101 and a pair of rear wheels 107 that are steering wheels at the rear of the vehicle body 101.
- the pair of front wheels 106 is driven by an electric motor (not shown). Electric power is supplied to the electric motor from the power generation unit 105.
- the pair of rear wheels 107 is steered by a driver who is on the driver's seat 103.
- the forklift 100 includes a counterweight 108 at the rear of the vehicle body 101.
- the counterweight 108 serves to adjust the vehicle weight and balance the weight of the vehicle body 101.
- the forklift 100 does not include a counterweight on the front portion of the vehicle body 101.
- the high-pressure hydrogen container 1 provided at the center of the vehicle body 101 of the forklift 100 has a weight that assists the counterweight 108. That is, the high-pressure hydrogen container 1 also serves as a part of the counterweight of the forklift 100. Therefore, the fuel cell 104 is contained in a case (not shown) that is lightweight and easy to process. The case does not double as a counterweight.
- the high pressure hydrogen container 1 is used in the forklift 100. However, it is not limited to this.
- the high-pressure hydrogen container 1 is also used for other transportation vehicles.
- the transportation vehicle may be a towing car used at an airport or the like.
- FIG. 2 is an explanatory view showing the high-pressure hydrogen container 1 according to the embodiment of the present invention in a cross section showing a cylinder extending direction of the metal cylinder 2 and the outer cylinder 4.
- the high-pressure hydrogen container 1 shown in FIG. 2 stores high-pressure hydrogen.
- the high-pressure hydrogen container 1 includes a metal cylinder 2, a lid member 3, and an outer cylinder 4.
- the lid member 3 is fixed to the outer cylinder 4 by bolts 5 which are fastening members.
- the bolts 5 are fixed at a plurality of points on the same circumference at regular intervals.
- the outer cylinder 4 is an example of the outer cylinder.
- the outer cylinder 4 is a cylindrical outer cylinder.
- the metal cylinder 2 is a cylindrical member for storing high-pressure hydrogen whose both ends are open.
- the metal cylinder 2 is composed of a seamless metal cylindrical member in order to prevent leakage of high-pressure hydrogen stored inside.
- the metal cylinder 2 is made of, for example, low alloy steel. That is, the metal cylinder 2 is configured to have, for example, any one of chromium molybdenum steel, nickel chromium molybdenum steel, manganese chromium steel, manganese steel, and boron-added steel.
- the decarburized layer is removed from the inner peripheral surface of the metal cylinder 2.
- residual compressive stress is applied to the inner surface by irradiation with a shot ball having a large mass.
- the carbon fiber reinforced resin portion may be wound around the outer circumference of the metal cylinder 2.
- the carbon fiber reinforced resin portion is provided in order to ensure the mechanical strength of the metal cylinder 2 that is the required pressure resistance.
- the carbon fiber reinforced resin portion is a composite material in which carbon fiber is used as a reinforcing material and is impregnated with resin to improve the strength, and for example, PAN-based carbon fiber or PITCH-based carbon fiber is used.
- the lid members 3 are attached to both ends of the metal cylinder 2 to cover both ends of the metal cylinder 2 and close the metal cylinder 2.
- the pair of lid members 3 are disc members. At least one lid member 3 is provided with a valve (not shown) connected to a hydrogen passage hole (not shown), and is used for filling or releasing high-pressure hydrogen.
- the pair of lid members 3 is made of the same metal as the metal cylinder 2.
- a plurality of insertion holes 3a for inserting the bolts 5 are formed in the pair of lid members 3.
- the insertion hole 3a of the lid member 3 is formed with a recess 3b for accommodating the head 5a of the bolt 5.
- the concave portion 3b may not be formed. When there is no recessed portion 3b, the head portion 5a of the bolt 5 projects outside the lid member 3.
- the outer cylinder 4 is a cylindrical member whose both ends are open and which surrounds the outer circumference of the cylindrical part of the metal cylinder 2.
- the outer cylinder 4 may be a metal cylindrical member having a joint such as a welded pipe in order to reduce the manufacturing cost.
- the outer cylinder 4 is made of metal, which is a steel material that is less expensive than the metal cylinder 2.
- the outer cylinder 4 is preferably made of a material having a density equal to or higher than that of the metal cylinder 2.
- the outer cylinder 4 is formed with a screw hole 4a into which the bolt 5 is screwed.
- the bolt 5 is inserted into the outer cylinder 4 from the lid member 3 and fixed with a screw.
- the bolt 5 is screw-fixed by inserting a tool such as a spanner between the recess 3b of the lid member 3 and the head 5a of the bolt 5. Further, the bolt 5 may be screw-fixed to the head portion 5a with an insertion hole into which a tool such as a hexagon wrench is fitted.
- ⁇ Cylindrical gap 6> Between the outer circumference of the metal cylinder 2 and the inner circumference of the outer cylinder 4, a cylindrical gap 6 is formed that separates the metal cylinder 2 and the outer cylinder 4.
- the radial width of the gap 6 is preferably 1 mm or more, and more preferably 2 mm or more. Hydrogen penetrates into the metal cylinder 2 that is in direct contact with the stored high-pressure hydrogen. However, the hydrogen oozing out from the metal cylinder 2 does not permeate into the outer cylinder 4 separated by the gap 6 because the hydrogen oozes out from the metal cylinder 2. Therefore, in the high-pressure hydrogen container 1, hydrogen deterioration of the outer cylinder 4 and the bolt 5 does not occur.
- the gap 6 exists between the outer circumference of the metal cylinder 2 and the inner circumference of the outer cylinder 4, even if the metal cylinder 2 is deformed in the circumferential direction by the high-pressure hydrogen stored therein, the deformation stress is not generated. It does not reach bolt 5.
- FIG. 3 is an enlarged view showing a part of the high-pressure hydrogen container 1 according to the embodiment of the present invention by enlarging the portion A in FIG.
- the outer tube 4 is formed with a flow path 7 communicating from the gap 6 to the outside on the outer peripheral side. Since the hydrogen accumulated in the gap 6 flows to the outside from the flow path 7, the hydrogen is not accumulated in the gap 6 at a high concentration, and the safety of the high-pressure hydrogen container 1 can be secured.
- the flow path 7 may not be provided. Moreover, the flow path 7 may be one or more.
- the metal cylinder 2 and the lid member 3 are fitted together by the first fitting structure 8.
- the first fitting structure 8 is a structure in which the convex portions 8a formed on the outer peripheral portions of both ends of the metal cylinder 2 and the concave portions 8b formed on the inner side surface of the lid member 3 are fitted to each other.
- the convex portion 8a and the concave portion 8b have an annular shape. Further, the convex portions 8a and the concave portions 8b may be scattered on the same circumference.
- the first fitting structure 8 may be fitted in other shapes.
- a first O-ring 9a and a second O-ring 9b as seal members are provided between the metal cylinder 2 and the lid member 3 on the inner diameter side of the first fitting structure 8.
- the first O-ring 9a is arranged on the inner peripheral side of the second O-ring 9b.
- the first O-ring 9a seals between the metal cylinder 2 and the lid member 3.
- the second O-ring 9b is a seal member when the first O-ring 9a deteriorates and hydrogen leaks.
- a leak hydrogen release hole 10 is formed in the lid member 3 between the first O ring 9a and the second O ring 9b.
- the leaked hydrogen release hole 10 communicates with the outside of the lid member 3.
- a hydrogen sensor 11 is provided at the outlet of the leak hydrogen release hole 10. The hydrogen sensor 11 monitors the leakage of leaked hydrogen.
- the second fitting structure 12 is a structure in which a convex portion 12 a formed at the center of both ends of the outer cylinder 4 and a concave portion 12 b formed on the inner side surface of the lid member 3 are fitted together.
- the convex portion 12a and the concave portion 12b have an annular shape. Further, the convex portions 12a and the concave portions 12b may be scattered on the same circumference.
- the second fitting structure 12 may be fitted in other shapes.
- the second fitting structure 12 is provided at the fastening portion of the bolt 5.
- the bolt 5 is fastened at a portion where the outer cylinder 4 is combined with the lid member 3 by the second fitting structure 12 with accurate positioning.
- FIG. 4 is an explanatory diagram showing a high-pressure hydrogen container 1 according to the first modification of the embodiment of the present invention in a cross section showing the cylinder stretching directions of the metal cylinder 2 and the outer cylinder 4.
- FIG. 5 is a side view showing the high-pressure hydrogen container 1 according to the modified example 1 of the embodiment of the present invention from the direction of arrow B in FIG.
- description of the same items as those in the above-described embodiment will be omitted, and only the characteristic part will be described.
- the insertion hole 3a of the lid member 3 is not formed with a recess for accommodating the head 5a of the bolt 5.
- the head 5 a of the bolt 5 projects outside the lid member 3.
- the bolt 5 has a socket 5a1 into which a tool such as a hexagon wrench is fitted in the head 5a and is screwed.
- FIG. 6 is a side view showing the high-pressure hydrogen container 1 according to the modified example 2 of the embodiment of the present invention in the direction of arrow B in FIG.
- FIG. 7 is an explanatory view showing the metal cylinder 2 and the outer cylinder 4 of the high-pressure hydrogen container 1 according to the second modification of the embodiment of the present invention in a cross section taken in the direction of arrow B in FIG.
- description of the same items as those in the above-described embodiment will be omitted, and only the characteristic part will be described.
- the lid member 3 has a flat lower surface.
- the lid member 3 is a plate-shaped member.
- the outer cylinder 4 has a flat lower surface similarly to the illustrated lid member 3.
- the outer cylinder 4 is an outer quadrangular cylinder having a quadrangular cylinder shape having four sides having the same shape according to the outer peripheral shape of the lid member 3.
- the outer cylinder 4 is configured by combining four plate-shaped members 4b.
- a fixing member such as a bolt 4c is used to fix the four plate-shaped members 4b.
- the outer cylinder 4 may have a shape having a flat lower surface different from the outer square cylinder.
- the outer cylinder 4 may be a polygonal cylinder member such as a U-shape, a truncated cone shape, or a truncated pyramid shape.
- the lid member 3 may be a plate-shaped member having the same shape as the outer peripheral shape of the outer cylinder 4.
- the high-pressure hydrogen container 1 comprises a metal cylinder 2 for storing high-pressure hydrogen.
- the high-pressure hydrogen container 1 includes a lid member 3 that covers both ends of the metal cylinder 2.
- the high-pressure hydrogen container 1 includes an outer cylinder 4 that surrounds the outer circumference of the cylindrical portion of the metal cylinder 2.
- the high-pressure hydrogen container 1 includes a fastening member that fixes the lid member 3 and the outer cylinder 4.
- the high-pressure hydrogen container 1 has the outer cylinder 4 surrounding the outer periphery of the cylindrical portion of the metal cylinder 2 and the lid members 3 for covering both ends of the metal cylinder 2 fixed by the bolts 5 as fastening members. Can be manufactured. Therefore, it is possible to provide a safe high-pressure hydrogen container 1 which has a simple structure, requires no labor for manufacturing, and can reduce manufacturing cost.
- the bolt 5 is used as the fastening member.
- the high-pressure hydrogen container 1 can be manufactured by fixing the lid members 3 that cover both ends of the metal cylinder 2 to the outer cylinder 4 that surrounds the outer circumference of the metal cylinder 2 with the bolts 5.
- the bolt 5 is inserted from the lid member 3 into the outer cylinder 4.
- the lid member 3 is formed with a recess 3b for accommodating the head 5a of the bolt 5.
- the bolt 5 does not project at both ends of the high-pressure hydrogen container 1, and the cylindrical portion provided between both lid members 3 of the high-pressure hydrogen container 1 can be maximized in a limited installation space.
- the amount of high-pressure hydrogen stored in the high-pressure hydrogen container 1 can be increased.
- the high-pressure hydrogen container 1 mounted on a transportation vehicle is effective because it can be maximized in a limited installation space on the vehicle.
- a cylindrical gap 6 that separates the metal cylinder 2 and the outer cylinder 4 is formed between the outer circumference of the metal cylinder 2 and the inner circumference of the outer cylinder 4.
- the high-pressure hydrogen container 1 is safe because hydrogen deterioration of the outer cylinder 4 and the bolt 5 as the fastening member does not occur. Further, since the gap 6 exists between the outer circumference of the metal cylinder 2 and the inner circumference of the outer cylinder 4, even if the metal cylinder 2 is deformed in the circumferential direction by the high-pressure hydrogen stored therein, the deformation stress is not generated by the outer cylinder 4 and the outer cylinder 4. It does not reach the bolt 5, which is the fastening member.
- the outer tube 4 is formed with the flow path 7 communicating from the gap 6 to the outside on the outer peripheral side.
- the high-pressure hydrogen container 1 has the first fitting structure 8 for fitting the metal cylinder 2 and the lid member 3 together.
- the metal cylinder 2 that is not fixed to the lid member 3 by a fastening member or the like is combined with the lid member 3 with accurate positioning by the first fitting structure 8.
- the metal cylinder 2 and the lid member 3 are positionally fixed by the first fitting structure 8, the metal cylinder 2 does not contact the outer cylinder 4 and the cylindrical gap 6 is not closed.
- the first O-ring 9a and the second O-ring 9b which are sealing members, are provided between the metal cylinder 2 and the lid member 3 on the inner diameter side of the first fitting structure 8.
- the portion of the first fitting structure 8 has a complicated shape between the metal cylinder 2 and the lid member 3, and the sealing performance is not good. Since the first O-ring 9a and the second O-ring 9b, which are sealing members, are provided between the metal cylinder 2 on the inner diameter side of the first fitting structure 8 and the lid member 3, the inner diameter is larger than that of the portion having poor sealing performance. On the side, the first O-ring 9a and the second O-ring 9b, which are sealing members, seal the metal cylinder 2 and the lid member 3 from each other. As a result, it is possible to prevent the high-pressure hydrogen stored inside from leaking from the outer peripheral side of the first O-ring 9a and the second O-ring 9b, which are sealing members.
- the high-pressure hydrogen container 1 has the second fitting structure 12 for fitting the outer cylinder 4 and the lid member 3 together.
- the outer cylinder 4 fixed to the lid member 3 with the bolt 5 as the fastening member is combined with the lid member 3 by the second fitting structure 12 with accurate positioning.
- the outer cylinder 4 can be easily fixed to the lid member 3 by using the bolt 5 which is a fastening member. Therefore, the manufacturing process of fastening by the bolt 5 which is the fastening member can be easily performed, and the manufacturing cost can be reduced.
- the second fitting structure 12 is provided at the fastening portion of the bolt 5 that is the fastening member.
- the outer cylinder 4 can be fastened using the bolt 5 as the fastening member at the portion where the outer fitting 4 is combined with the lid member 3 by the second fitting structure 12 with accurate positioning. Therefore, the manufacturing process of the fastening with the bolt 5 as the fastening member can be performed more easily, and the manufacturing cost can be further reduced.
- the outer cylinder 4 has a flat lower surface.
- the outer cylinder 4 can be installed on the installation surface downward with a flat lower surface. This stabilizes the installation of the outer cylinder 4 having the flat lower surface on the installation surface.
- the outer cylinder 4 is a square cylinder-shaped outer square cylinder.
- the outer cylinder 4 has the parallel upper and lower surfaces and the parallel both side surfaces, and the upper and lower surfaces and the both side surfaces are orthogonal planes.
- the outer cylinder 4 configured as the outer quadrangular cylinder does not have an extra convex portion on the outer peripheral surface, and the high-pressure hydrogen container 1 having the other outer quadrangular cylinders in the vertical and horizontal directions of the one high-pressure hydrogen container 1 is formed. They can be arranged adjacent to each other, and a plurality of high-pressure hydrogen containers 1 can be stacked without wasting space.
- the outer cylinder 4 is a cylindrical outer cylinder.
- the outer cylinder 4 configured as an outer cylinder has uniform pressure resistance in the entire circumferential direction. As a result, the rigidity of the outer cylinder 4 configured as the outer cylinder is increased.
- the high-pressure hydrogen container 1 also serves as a part of the counterweight of the transportation vehicle.
- the weight of the high-pressure hydrogen container 1 becomes heavy due to the double cylindrical member of the metal cylinder 2 and the outer cylinder 4. Therefore, the total amount of counterweights mounted on the transportation vehicle can be reduced, and the number of parts of the transportation vehicle can be reduced. Thereby, the manufacturing cost of the transportation vehicle can be reduced.
- 1 high-pressure hydrogen container 2 metal cylinder, 3 lid member, 3a insertion hole, 3b recess, 4 outer cylinder, 4a screw hole, 4b plate member, 4c bolt, 5 bolt, 5a head, 5a1 insertion hole, 6 gap, 7 flow path, 8 1st fitting structure, 8a convex portion, 8b concave portion, 9a 1st O ring, 9b 2nd O ring, 10 leak hydrogen release hole, 11 hydrogen sensor, 12 2nd fitting structure, 12a convex portion, 12b Recesses, 100 forklifts, 101 vehicle body, 102 cargo handling equipment, 103 driver's seat, 104 fuel cell, 105 power generation unit, 106 front wheels, 107 rear wheels, 108 counterweight.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Geology (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
Description
本発明の高圧水素容器は、
高圧水素の貯蔵用の金属円筒と、
前記金属円筒の両端部をそれぞれ覆う蓋部材と、
前記金属円筒の円筒部の外周を取り囲む外側筒と、
前記蓋部材と前記外側筒とを固定した締結部材と、
を備える。
[2]
[1]に記載の高圧水素容器では、
前記締結部材には、ボルトが用いられる。
[3]
[2]に記載の高圧水素容器では、
前記ボルトは、前記蓋部材から前記外側筒に差し込まれ、
前記蓋部材には、前記ボルトの頭部を収納する凹部が形成される。
[4]
[1]~[3]のいずれか1つに記載の高圧水素容器では、
前記金属円筒の外周と前記外側筒の内周との間には、前記金属円筒と前記外側円筒とを離間させた隙間が形成される。
[5]
[4]に記載の高圧水素容器では、
前記外側筒には、前記隙間から外周側の外部に通じる流路が形成される。
[6]
[1]~[5]のいずれか1つに記載の高圧水素容器は、
前記金属円筒と前記蓋部材とを嵌め合う第1嵌め合い構造を有する。
[7]
[6]に記載の高圧水素容器では、
前記第1嵌め合い構造よりも内径側の前記金属円筒と前記蓋部材との間には、シール部材が設けられる。
[8]
[1]~[7]のいずれか1つに記載の高圧水素容器は、
前記外側筒と前記蓋部材とを嵌め合う第2嵌め合い構造を有する。
[9]
[8]に記載の高圧水素容器では、
前記第2嵌め合い構造は、前記締結部材の締結部に設けられる。
[10]
[1]~[9]のいずれかに記載の高圧水素容器では、
前記外側筒は、平坦な下面を有する。
[11]
[1]~[10]のいずれか1つに記載の高圧水素容器では、
前記外側筒は、四角筒形状の外側四角筒である。
[12]
[1]~[9]のいずれか1つに記載の高圧水素容器では、
前記外側筒は、円筒形状の外側円筒である。
[13]
[1]~[12]のいずれか1つに記載の高圧水素容器では、
当該高圧水素容器は、輸送用車両のカウンターウェイトの一部を兼ねる。
図1は、本発明の実施の形態に係るフォークリフト100を示す概略構成図である。図1に示すフォークリフト100は、燃料電池式の輸送用車両である。フォークリフト100は、車体101の前部に荷役装置102を備える。フォークリフト100は、車体101の中央部に運転席103を備える。
上述のようにフォークリフト100に高圧水素容器1が用いられる。しかし、これに限られない。その他の輸送用車両にも高圧水素容器1が用いられる。たとえば、輸送用車両としては、空港などで使用されるトーイングカーなどでも良い。
図2は、本発明の実施の形態に係る高圧水素容器1を金属円筒2及び外側筒4の筒延伸方向を表す断面にて示す説明図である。図2に示す高圧水素容器1は、高圧水素を貯蔵する。高圧水素容器1は、金属円筒2と、蓋部材3と、外側筒4と、を備える。蓋部材3は、外側筒4に対して締結部材であるボルト5によって固定されている。ボルト5は、一定間隔で同一円周上に複数箇所にて固定を行っている。ここで、外側筒4は、外側筒の一例である。外側筒4は、円筒形状の外側円筒を用いている。
金属円筒2は、両端部が開放された高圧水素の貯蔵用の円筒部材である。金属円筒2は、内部に貯蔵する高圧水素の漏れを防ぐため、継目無しの金属製円筒部材で構成されている。
蓋部材3は、金属円筒2の両端部にそれぞれ取り付けられて金属円筒2の両端部を覆い、金属円筒2を閉塞する。一対の蓋部材3は、円板部材である。少なくとも一方の蓋部材3には、図示しない水素通し孔に繋がった図示しないバルブが設けられ、高圧水素の封入又は放出に利用される。一対の蓋部材3は、金属円筒2と同様な金属製である。
外側筒4は、両端部が開放され、金属円筒2の円筒部の外周を取り囲む円筒部材である。外側筒4は、製造コストの低減を図るために溶接管などの継目を有する金属製円筒部材で良い。外側筒4は、金属円筒2よりも安価な鉄鋼材料の金属製である。外側筒4は、金属円筒2と同等以上の密度を有する材料であると好ましい。
金属円筒2の外周と外側筒4の内周との間には、金属円筒2と外側筒4とを離間させた円筒状の隙間6が形成されている。隙間6の半径方向の幅は、たとえば、1mm以上が好ましく、2mm以上がより好ましい。貯蔵する高圧水素に直接接触する金属円筒2には、水素が浸透する。しかし、隙間6を隔てた外側筒4には、金属円筒2からにじみ出た水素が隙間6に溜まって浸透しない。そのため、高圧水素容器1は、外側筒4及びボルト5の水素劣化を生じない。また、隙間6が金属円筒2の外周と外側筒4の内周との間に存在することにより、金属円筒2が貯蔵する高圧水素によって周方向に変形してもその変形応力が外側筒4及びボルト5に伝わらない。
図3は、本発明の実施の形態に係る高圧水素容器1の一部を図2のA部を拡大して示す拡大図である。図3に示すように、外側筒4には、隙間6から外周側の外部に通じる流路7が形成されるのが望ましい。隙間6に溜まった水素は、流路7から外部に流れることにより、隙間6に水素が高濃度に溜まらず、高圧水素容器1の安全が確保できる。なお、流路7は、設けられなくても良い。また、流路7は、1つ又は複数であっても良い。
図4は、本発明の実施の形態の変形例1に係る高圧水素容器1を金属円筒2及び外側筒4の筒延伸方向を表す断面にて示す説明図である。図5は、本発明の実施の形態の変形例1に係る高圧水素容器1を図4の矢印Bの方向から示す側面図である。ここでは、上記実施の形態と同様の事項の説明を省略し、その特徴部分のみ説明する。
図6は、本発明の実施の形態の変形例2に係る高圧水素容器1を図4の矢印Bの方向から示す側面図である。図7は、本発明の実施の形態の変形例2に係る高圧水素容器1の金属円筒2及び外側筒4を図4の矢印Bの方向からの断面にて示す説明図である。ここでは、上記実施の形態と同様の事項の説明を省略し、その特徴部分のみ説明する。
実施の形態によれば、高圧水素容器1は、高圧水素の貯蔵用の金属円筒2を備える。高圧水素容器1は、金属円筒2の両端部をそれぞれ覆う蓋部材3を備える。高圧水素容器1は、金属円筒2の円筒部の外周を取り囲む外側筒4を備える。高圧水素容器1は、蓋部材3と外側筒4とを固定した締結部材を備える。
Claims (13)
- 高圧水素の貯蔵用の金属円筒と、
前記金属円筒の両端部をそれぞれ覆う蓋部材と、
前記金属円筒の円筒部の外周を取り囲む外側筒と、
前記蓋部材と前記外側筒とを固定した締結部材と、
を備える高圧水素容器。 - 前記締結部材には、ボルトが用いられる請求項1に記載の高圧水素容器。
- 前記ボルトは、前記蓋部材から前記外側筒に差し込まれ、
前記蓋部材には、前記ボルトの頭部を収納する凹部が形成される請求項2に記載の高圧水素容器。 - 前記金属円筒の外周と前記外側筒の内周との間には、前記金属円筒と前記外側筒とを離間させた隙間が形成される請求項1~3のいずれか1項に記載の高圧水素容器。
- 前記外側筒には、前記隙間から外周側の外部に通じる流路が形成される請求項4に記載の高圧水素容器。
- 前記金属円筒と前記蓋部材とを嵌め合う第1嵌め合い構造を有する請求項1~5のいずれか1項に記載の高圧水素容器。
- 前記第1嵌め合い構造よりも内径側の前記金属円筒と前記蓋部材との間には、シール部材が設けられる請求項6に記載の高圧水素容器。
- 前記外側筒と前記蓋部材とを嵌め合う第2嵌め合い構造を有する請求項1~7のいずれか1項に記載の高圧水素容器。
- 前記第2嵌め合い構造は、前記締結部材の締結部に設けられる請求項8に記載の高圧水素容器。
- 前記外側筒は、平坦な下面を有する請求項1~請求項9のいずれか1項に記載の高圧水素容器。
- 前記外側筒は、四角筒形状の外側四角筒である請求項1~請求項10のいずれか1項に記載の高圧水素容器。
- 前記外側筒は、円筒形状の外側円筒である請求項1~請求項9のいずれか1項に記載の高圧水素容器。
- 当該高圧水素容器は、輸送用車両のカウンターウェイトの一部を兼ねる請求項1~12のいずれか1項に記載の高圧水素容器。
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KR1020217012280A KR102569417B1 (ko) | 2018-11-12 | 2019-11-11 | 고압 수소 용기 |
CN201980070437.3A CN112912659B (zh) | 2018-11-12 | 2019-11-11 | 高压氢容器 |
JP2020536695A JP6968286B2 (ja) | 2018-11-12 | 2019-11-11 | 高圧水素容器 |
US17/287,683 US20210396354A1 (en) | 2018-11-12 | 2019-11-11 | High-pressure hydrogen tank |
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CN112762348B (zh) * | 2020-12-09 | 2022-12-16 | 河南中原特钢装备制造有限公司 | 介质为氢气的高温超高压容器 |
EP4137642B1 (de) * | 2021-08-19 | 2024-03-27 | Liebherr-Werk Bischofshofen GmbH | Arbeitsmaschine |
GB2615333A (en) * | 2022-02-03 | 2023-08-09 | Bamford Excavators Ltd | Working vehicle |
FR3133387A1 (fr) * | 2022-03-11 | 2023-09-15 | Manitou Bf | Machine de manutention comportant un réservoir destiné à contenir de l’hydrogène |
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JPWO2020100800A1 (ja) | 2021-02-15 |
US20210396354A1 (en) | 2021-12-23 |
KR20210063402A (ko) | 2021-06-01 |
CN112912659A (zh) | 2021-06-04 |
CN112912659B (zh) | 2022-08-26 |
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