EP3667154A1 - Pressurised container and method for manufacturing the same - Google Patents
Pressurised container and method for manufacturing the same Download PDFInfo
- Publication number
- EP3667154A1 EP3667154A1 EP19000358.2A EP19000358A EP3667154A1 EP 3667154 A1 EP3667154 A1 EP 3667154A1 EP 19000358 A EP19000358 A EP 19000358A EP 3667154 A1 EP3667154 A1 EP 3667154A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- inner container
- pressure vessel
- plastic
- connecting pieces
- end faces
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 6
- 238000000034 method Methods 0.000 title claims description 4
- 229920003023 plastic Polymers 0.000 claims abstract description 40
- 239000004033 plastic Substances 0.000 claims abstract description 40
- 230000002787 reinforcement Effects 0.000 claims abstract description 36
- 239000004744 fabric Substances 0.000 claims abstract description 15
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 8
- 239000000853 adhesive Substances 0.000 claims abstract description 7
- 230000001070 adhesive effect Effects 0.000 claims abstract description 7
- 238000003466 welding Methods 0.000 claims abstract description 3
- 239000002184 metal Substances 0.000 claims description 21
- 238000007789 sealing Methods 0.000 claims description 21
- 239000000835 fiber Substances 0.000 claims description 13
- -1 polyethylenes Polymers 0.000 claims description 11
- 239000004698 Polyethylene Substances 0.000 claims description 10
- 229920000573 polyethylene Polymers 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 6
- 239000004952 Polyamide Substances 0.000 claims description 5
- 239000003365 glass fiber Substances 0.000 claims description 5
- 229920002647 polyamide Polymers 0.000 claims description 5
- 229920006324 polyoxymethylene Polymers 0.000 claims description 4
- 238000005245 sintering Methods 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229920000742 Cotton Polymers 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 2
- 239000004760 aramid Substances 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims description 2
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims 2
- 229920001155 polypropylene Polymers 0.000 claims 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims 1
- 229920003235 aromatic polyamide Polymers 0.000 claims 1
- 229910052796 boron Inorganic materials 0.000 claims 1
- 239000011521 glass Substances 0.000 claims 1
- 229920001568 phenolic resin Polymers 0.000 claims 1
- 239000005011 phenolic resin Substances 0.000 claims 1
- 230000009969 flowable effect Effects 0.000 abstract description 4
- 239000002131 composite material Substances 0.000 description 12
- 239000011324 bead Substances 0.000 description 8
- 238000003860 storage Methods 0.000 description 8
- 229920001903 high density polyethylene Polymers 0.000 description 6
- 238000004804 winding Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000005253 cladding Methods 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 125000004805 propylene group Chemical class [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000001175 rotational moulding Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- 229920002748 Basalt fiber Polymers 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000003682 fluorination reaction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/06—Closures, e.g. cap, breakable member
-
- 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
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0104—Shape cylindrical
- F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
-
- 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
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0602—Wall structures; Special features thereof
- F17C2203/0604—Liners
-
- 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
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0602—Wall structures; Special features thereof
- F17C2203/0612—Wall structures
- F17C2203/0614—Single wall
- F17C2203/0619—Single wall with two layers
-
- 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
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0634—Materials for walls or layers thereof
- F17C2203/0658—Synthetics
- F17C2203/066—Plastics
-
- 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
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0634—Materials for walls or layers thereof
- F17C2203/0658—Synthetics
- F17C2203/0663—Synthetics in form of fibers or filaments
-
- 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
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0305—Bosses, e.g. boss collars
-
- 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
- F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
- F17C2225/03—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the pressure level
- F17C2225/036—Very high pressure, i.e. above 80 bars
Definitions
- the invention relates to a pressure vessel and a method for producing a pressure vessel made of plastic for a pressure-loaded, flowable or gaseous medium for pressures up to 700 bar and above.
- pressure vessels for pressure-loaded, flowable or gaseous media for high pressures are described as composite pressure vessels consisting of a plastic liner with fiber-reinforced reinforcement.
- the DE 195 26 154 C2 describes a composite pressure vessel for storing gaseous media under pressure.
- the pressure vessel consists of a plastic liner and two openings in the neck area, in each of which a neck piece closing and / or sealing the opening is arranged, at least one of which is designed to receive a screw-in valve.
- Both neck pieces are provided in the end region facing the pressure vessel with a flat, frustoconical collar.
- the collar is surrounded on the inside by the liner and on the outside by the reinforcing winding and is provided with a recess which extends from the inside of the pressure container and extends in a region of the liner which is designed as a neck.
- the recess has an internal thread section which interacts with an external thread section arranged on the region of the liner formed as a neck.
- a sealing washer is arranged between the outer surface of the liner and the underside of the collar of the neck piece, and a sealing ring is located in a screwed-in groove of the respective neck piece between the end face of the neck section of the liner and the cooperating stop face of the neck piece.
- a composite pressure vessel for storing gaseous media under pressure, with a liner made of plastic and a winding of a fiber composite material which reinforces the liner, a neck piece arranged in the neck region being provided which has a collar which is on the inside of the liner and on the outside of the fiber composite material is surrounded and has a neck portion, in the lower end of which the liner engages and the upper end of which has a thread, an annular radial groove for receiving a sealing element being arranged between the two ends.
- the neck piece is formed from a container part having the collar and a screw-in connector screwed into the container part, the radial groove being formed in the screw-in connector.
- the DE 10 2006 043 582 B3 describes a pressure vessel for a pressure-loaded, flowable or gaseous medium, which consists of a plastic liner and a first reinforcement made of fibers, the first reinforcement being applied as a winding to a plastic liner and embedded in synthetic resin.
- a second reinforcement is provided and the two reinforcements are arranged in layers one above the other, the second reinforcement having an elongation at break that is smaller than that of the first reinforcement, so that the first reinforcement, taken on its own, is sufficient to absorb the forces resulting from the pressure of the medium in the pressure vessel as a whole.
- the DE 10 2007 011 211 B3 discloses a pressure container for storing liquid or gaseous media, which consists of a plastic core container with at least one cylindrical collar, wherein a metal cylinder of a metal body surrounding the collar on the outside is arranged in the opening of the collar.
- the metal cylinder is designed as a component of the metal fitting, connects directly to an external thread and has a stepped smaller outer diameter than the external thread.
- the metal body is provided with a flange projecting radially outwards.
- the metal cylinder has at least one groove that is open radially outwards and into which at least one O-ring seal is pressed, sealingly pressed onto the collar, at least one O-ring seal in an O-ring provided with an external thread of the collar and screwed into the metal body Part of the collar is pressed between the metal body and the metal cylinder. A metal fitting with an external thread is screwed into the end of the metal body facing away from the metal cylinder.
- a support sleeve made of a fiber composite.
- the DE 197 51 411 C1 discloses a composite pressure vessel for storing gaseous media under pressure with a liner made of plastic and two neck pieces arranged in the neck area, of which at least one is designed to receive a screw-in, threaded valve and with a winding of a fiber composite material that reinforces the liner.
- Both neck pieces are provided in the end area facing the pressure vessel with a flat truncated cone-like collar which is surrounded on the inside by the liner and on the outside by the reinforcing winding.
- the neck piece In the area facing the liner, the neck piece has an internal thread section which interacts with an external thread section arranged on the area of the liner designed as a neck.
- the neck piece receiving a valve has an annular groove on the inside of the thread-free region adjoining the internally threaded section for receiving a sealing element.
- a further internal thread section for receiving the valve follows and the neck piece receiving the valve is provided with a key attachment on the outside to prevent rotation.
- a clamping ring which can be screwed into it is provided, which has a threaded section on the outer jacket and which is followed by a thread-free, frustoconical section.
- the annular groove arranged between the internal thread sections of the neck piece for receiving a sealing ring extends radially into the neck piece.
- the invention according to the DE 10 2006 004 121 A1 relates to a pressure vessel for receiving at least one fluid medium with a first plastic jacket and a second plastic jacket which at least partially encompasses the first plastic jacket, the first plastic jacket having at least at one end a collar part which comprises an opening for the media supply and removal.
- the collar part and the plastic jacket are supported on an intermediate outer ring which tapers in a wedge-like manner in the direction of a gap opening between said jackets.
- the pressure vessel consists of two plastic sleeves.
- the DE 10 2009 049 948 B4 relates to a pressure vessel for storing liquid or gaseous media.
- the pressure container comprises a plastic inner container with at least one neck piece which is not integrally connected to the pressure container and which is arranged on the container neck in the region of the container opening.
- the pressure vessel is equipped with a support sleeve which at least partially surrounds the plastic inner vessel and the neck piece.
- the neck piece is provided with means for receiving a connection fitting.
- the pressure container is characterized by an insert which forms at least part of the container neck and which forms a sealing seat for the fitting to be inserted into the neck piece.
- the metal nozzle bead consists of a cylindrical nozzle head part that has both a vertical through hole and an internal thread formed on an upper portion of an inner peripheral surface of the vertical through hole.
- the metal nozzle bead includes a seal ring mounting member that is pressed into a lower surface of a multi-step support socket protruding upward and outward from an outer peripheral surface of the nozzle bead at a location below the lower inclined surface.
- a seal device that extends downward from the seal ring mounting member has both an outer mounting thread formed around a lower portion of an outer peripheral surface of the seal device and one Fastening surface, which is formed between an upper end of the outer fastening thread and the sealing ring mounting part.
- the fastening surface has a diameter which is equal to a diameter of a core of the outer fastening thread.
- a tubular fastener having an inner fastener thread engages the outer fastener thread of the sealing device such that an upper surface of the fastener contacts an inner surface of the plastic liner, at one location on the top surface of the fastener , which corresponds to a connection point between the metal nozzle bead and the plastic cladding, a cranked sealing ring seat is provided.
- a seal ring is seated in the seal ring seat of the fastener so that a lower surface of the seal ring having a seat on a first surface thereof contacts the seal ring mounting part of the metal nozzle bead and a second surface thereof contacts the plastic liner.
- the DE 10 2006 031 118 B4 discloses a high pressure tank assembly consisting of an inner liner / inner liner layer, preferably made of polyethylene, and an outer construction / outer layer, preferably made of graphite composite. An opening is defined in the outer construction position / outer position, on which an annular projection, which is positioned in the opening and has an inner bore, is arranged.
- the inner liner ply is positioned in the outer build position, the inner liner ply comprising a neck portion that extends through the inner bore of the protrusion.
- the neck portion includes an outer annular flange positioned on the protrusion at a location outside of the outer layer.
- a tank valve mounted on the protrusion extends through the neck portion of the inner liner sheet.
- An O-ring positioned between a base portion of the tank valve and the annular flange seals the high pressure tank assembly from its surroundings.
- the tank valve is attached to the high pressure tank assembly by screws screwed into the protrusion through the base portion with sealing washers positioned around the screws between the base portion and a portion of the protrusion.
- the EP 2 000 734 (A2 ) describes a pressure-resistant container, which consists of an inner shell and an outer shell that encases the inner shell.
- a band part is fastened in the inner shell with a collar, the collar having a radial sealing surface.
- a mouth ring with a stepped internal bore and with two differently sized internal threads and with an external thread is arranged around the collar.
- the mouth ring is pressed through the outer shell onto the inner shell.
- the mouth ring is sealed off from the radial sealing surface of the collar by means of a screw-in pressing element and a first seal in the form of an O-ring.
- a screw-in valve is sealed with a further seal in the form of an O-ring against the pressing element and by means of a further O-ring on the head part of the mouth ring.
- the mouth ring is attached to the outer shell by means of its external thread.
- the DE 10 2010 017 413 B4 describes a pressure vessel for storing a fluid, with a plastic core container and an outer jacket applied to the plastic core container.
- the outer jacket has a first fiber-reinforced reinforcement with one or more wound, first fibers, in particular carbon fibers, which are embedded in a first matrix material and a second fiber-reinforced reinforcement, which is external with respect to the first reinforcement and with one or more wound, second layer Fibers, namely glass fibers, aramid fibers, polyamide fibers, polyester fibers or basalt fibers, is formed, the second fibers being different from the first fibers and being embedded in a second matrix material.
- a shock-absorbing reinforcement thickening is arranged in a polar cap region, namely the transition region between the end face and the circumference of the plastic core container, the shock-absorbing reinforcement thickening being formed by one or more wound layers in the polar cap region.
- the US 3,508,677 A describes a pressure vessel which consists of an inner container made of composite films and an outer shell, the inner container consisting of a cylindrical section and two cap sections.
- the outer shell is made of a glass fiber reinforcement.
- a connector defines an access opening through the end regions of the glass fiber shell and the inner container. The connector and the seal to the inner container and the outer shell are not explained in detail.
- a pressure vessel which consists of an inner container with end faces and a collar arranged on one end face and from an outer jacket made of fiber-reinforced reinforcement, connecting pieces being arranged between the inner container and the outer jacket on the end faces. with recesses on the end faces into which the connecting pieces are glued with the flanges that are adapted to the curvature of the end faces and an opening on the end face with a collar directed inwards into the inner container with an inner bore and one, the external thread of a middle part of the Domed flange receiving internal thread are arranged.
- a pressure container consisting of an inner container (1) made of plastic with end faces (3, 4) and one on the end face (3,4) arranged collar (9) and an outer jacket (2) made of fiber-reinforced reinforcement, connecting pieces (6,7) and recesses between the inner container (1) and the outer jacket (2) on the end faces (3,4) (5) for connecting pieces (6, 7) with flanges (8) which are adapted and curved to the curvature of the end faces (3, 4).
- the connecting pieces (6, 7) consist of the cylindrical central part (13) with a curved flange (8) which extends radially outwards to the cylindrical central part (13) and is adapted to the curvature of the depression (5) on the end face (3, 4).
- the internal thread (11) of the collar (9) and the external thread (14) of the cylindrical middle part (12) of the connecting piece (6, 7) are in the form of a tapered, self-sealing thread with a thread length that provides a positive connection between the recess (5) and allows the curved flanges (8), trained.
- the inner container (1) is provided with a fabric (15) incorporated into the melted outer skin of the inner container (1) and bores (16) are arranged in the curved flanges (8) of the connecting pieces (6, 7), via which a positive connection by welding the inner container (1) to the curved flanges (8) by means of drop-forming burning of plastic and the inner container (1) is sealed against the curved flanges (8) of the connecting pieces (6, 7) with silicone and adhesive.
- the fabric (15) worked into the outer skin of the inner container (1) is designed as a fabric, preferably a cotton fabric or a wire fabric made of metal or plastic with a low to medium areal density.
- the flanges (8) are connected by means of the bores (16) to the end faces (3, 4) of the inner container (1) via the bores (16) to the depressions (5) with liquid plastic dripping from the drop-forming combustion of plastics and welded in a form-fitting manner and sealed with silicone and glue. All plastics that form drops during combustion, such as polyethylenes (PE) or polyoxymethylenes (POM) or polyamides (PA) or propylenes (PP), are suitable as plastics.
- PE polyethylenes
- POM polyoxymethylenes
- PA polyamides
- PP propylenes
- the inner container (1) with its end faces (3, 4) and the circular depressions (5) and the collar (9) with its inner bore (13) and the inner thread (11) are produced in a rotational molding cycle from polyethylene or other plastics.
- the inner container (1) is made of polyethylene or other plastics by rotary sintering, the outer skin of the inner container (1) is melted on the surface with one or more infrared heat sources or open flames and a cotton fabric with a low surface density is incorporated into this melted layer (17).
- the metallic connecting pieces (6,7) with its curved flanges (8), which is adapted to the curvature of the recess (5) on the end face (3, 4), is then with its external thread (14) into the internal thread (11) of the Collar (9) screwed and the curved flange (8) of the connecting pieces (6,7) is simultaneously in the recess (5) of the end face (3,4) through the holes (16) in the curved flange by means of liquid by burning Polyethylene rods, dripping polyethylene, welded in with a positive fit and sealed with silicone and adhesive.
- the length of both threads is adapted to each other in such a way that the curved flange (8) of the connecting pieces (6,7) is positively welded to the end face (3,4) of the inner container (1) and sealed with silicone and adhesive.
- the inner container (1) is then wrapped with the connecting pieces (6, 7) welded and screwed into the end faces (3, 4) with a fiber-reinforced reinforcement as an outer casing (2) consisting of carbon and / or glass fibers impregnated with epoxy resin, the upper ends of the cylindrical middle part (13) of the connecting piece (6, 7) being excluded from the reinforcement.
- the inner container (1) can also be produced by other plastic molding processes such as blowing, injection molding, rotary sintering, etc. The invention therefore does not relate solely to the inner container produced by rotational molding.
- a pressure vessel which, due to its construction, is suitable for the storage and storage of fluid and gaseous media for very high pressures, in particular for 700 bar and above. Due to the materials used, such as polyethylene, and the lack of seams in the inner container and fluorination of the inner container, the risk of gases diffusing through the inner container is excluded. This is suitable this pressure vessel especially for the storage and storage of hydrogen. However, other easily diffusing media can also be stored and stored.
- the design of the end faces (3, 4) allows, for example, a fitting for filling the pressure container on the end face (3) and a manometer for measuring the pressure in the container on the end face (4).
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Die Erfindung betrifft einen Druckbehälter und eine Verfahren zur Herstellung eines Druckbehälters aus Kunststoff für ein druckbelastetes, fließfähiges oder gasförmiges Medium für Drücke bis 700 bar und darüber.Druckbehälter besteht aus einem Innenbehälter (1) aus Kunststoff mit Stirnseiten (3,4) und an den Stirnseite (3,4) angeordneten Kragen (10) sowie aus einem Außenmantel (2) aus einer faserverstärkten Armierung, wobei zwischen Innenbehälter (1) und dem Außenmantel (2) an den Stirnseiten (3,4) Anschlusstücke (6,7) in Vertiefungen (5) angeordnet sind, wobei der Innenbehälter (1) mit einem in die aufgeschmolzene Außenhaut des Innenbehälters (1) eingearbeiteten Gewebe (15) versehen ist und in den gewölbten Flansche (8) der Anschlussstücke (6,7) Bohrungen (16) angeordnet sind, über die eine formschlüssige Verbindung durch Verschweißen des Innenbehälter (1) mit den gewölbten Flanschen (8) mittels tropfenbildendes Verbrennen von Kunststoff hergestellt und mit Silikon und Kleber abgedichtet ist.The invention relates to a pressure vessel and a method for producing a pressure vessel made of plastic for a pressure-loaded, flowable or gaseous medium for pressures up to 700 bar and above. The pressure vessel consists of an inner container (1) made of plastic with end faces (3, 4) and on the Collar (10) arranged on the end face (3, 4) and an outer jacket (2) made of fiber-reinforced reinforcement, connecting pieces (6, 7) in between the inner container (1) and the outer jacket (2) on the end faces (3,4) Recesses (5) are arranged, the inner container (1) being provided with a fabric (15) worked into the melted outer skin of the inner container (1) and bores (16) in the curved flanges (8) of the connecting pieces (6, 7). are arranged, via which a positive connection is made by welding the inner container (1) to the curved flanges (8) by means of drop-forming burning of plastic and sealed with silicone and adhesive et is.
Description
Die Erfindung betrifft einen Druckbehälter und eine Verfahren zur Herstellung eines Druckbehälters aus Kunststoff für ein druckbelastetes, fließfähiges oder gasförmiges Medium für Drücke bis 700 bar und darüber.The invention relates to a pressure vessel and a method for producing a pressure vessel made of plastic for a pressure-loaded, flowable or gaseous medium for pressures up to 700 bar and above.
Im Stand der Technik werden Druckbehälter für druckbelastete, fließfähige oder gasförmige Medien für hohe Drücke als Composite- Druckbehälter bestehend aus einem Kunststoffliner mit faserverstärkter Armierung beschrieben.In the prior art, pressure vessels for pressure-loaded, flowable or gaseous media for high pressures are described as composite pressure vessels consisting of a plastic liner with fiber-reinforced reinforcement.
Die
In der
Die
Die
In the
The
The
Die
Die Erfindung gemäß der
The invention according to the
Dadurch, dass eine Spaltöffnung zwischen den Mänteln bis an eine Stelle herangeführt ist, bei der die Mäntel in koaxialer Anordnung in Anlage miteinander sind, und dass bis zu dieser Stelle eine keilartige Verjüngung eines Außenstützringes, der einstückig ausgebildet ist oder sich aus mindestens zwei ringförmigen Einzelsegmenten aus Metall zusammensetzt, führt, ist eine dichte Behälter- oder Speicheranordnung geschaffen, die mit geringen Herstellkosten realisierbar ist.
Die
In der
Die
Die
The
In the
The
The
In der Innenschale ist ein Bandteil mit einem Kragen befestigt, wobei der Kragen eine radiale Dichtfläche aufweist. Ein Mundring mit einer abgestuften Innenbohrung und mit zwei unterschiedlich großen Innengewinden sowie mit einem Außengewinde ist um den Kragen angeordnet.
Der Mundring wird durch die äußere Hülle auf die Innenschale gepresst. Mittels eines einschraubbaren Presselementes und einer ersten Dichtung in Form eines O- Ringes wird der Mundring gegenüber der radialen Dichtfläche des Kragens abgedichtet. Ein einschraubbares Ventil wird mit einer weiteren Dichtung in Form eine O- Ringes gegenüber dem Presselementes und mittels eines weiteren O- Ringes am Kopfteil des Mundringes abgedichtet. Der Mundring wird mittels seines Außengewindes auf die äußere Hülle befestigt.
Die
Die
In der
Alle im Stand der Technik dargestellten Lösungen zur Abdichtung von Armaturen oder Ventilen in Druckbehältern mit einem inneren Behälter und einer äußeren Armierung, insbesondere für Druckbehälter, die für hohe Drücke ausgelegt sind bestehen aus einer Vielzahl von Bauteilen, sind kompliziert im Aufbau und verwenden als Dichtelemente O- Ringe. Die Dichtelemente müssen nach bestimmten Nutzungszeiten gewechselt werden, da diese mit der Zeit altern und undicht werden. Weiterhin entstehen durch die Vielzahl von Bauteilen solcher Abdichtungen und durch deren Verbindung miteinander Spalten, die die Gefahr von Leckagen erhöht. Da diese Druckbehälter auch für die Lagerung und Speicherung von Wasserstoff eingesetzt werden, ist damit die Gefahr von Explosionen gegeben. Außerdem wird durch die Anzahl der Bauelemente die Fertigung solcher Druckbehälter wesentlich verteuert.
Bei der Lösung gemäß
Aufgabe der Erfindung ist es, einen Druckbehälter zu entwickeln, der diese hohen Druckbelastungen über 700 bar Betriebsdruck standhält, die für die Aufnahme der Armaturen und Ventile dienenden Flache an den Stirnseiten nicht ausreißen und bei dem die Abdichtung von Armaturen und Ventilen gegenüber dem Innenbehälter und der äußeren Armierung zuverlässig erfolgt und durch eine Verringerung der Anzahl der Bauteile solcher Abdichtung die Kosten für solch einen Behälter reduziert werden.A band part is fastened in the inner shell with a collar, the collar having a radial sealing surface. A mouth ring with a stepped internal bore and with two differently sized internal threads and with an external thread is arranged around the collar.
The mouth ring is pressed through the outer shell onto the inner shell. The mouth ring is sealed off from the radial sealing surface of the collar by means of a screw-in pressing element and a first seal in the form of an O-ring. A screw-in valve is sealed with a further seal in the form of an O-ring against the pressing element and by means of a further O-ring on the head part of the mouth ring. The mouth ring is attached to the outer shell by means of its external thread.
The
The
In the
All of the solutions shown in the prior art for sealing fittings or valves in pressure vessels with an inner vessel and an outer reinforcement, in particular for pressure vessels which are designed for high pressures, consist of a large number of components, are complicated in construction and use as sealing elements O - rings. The sealing elements must be replaced after certain times of use, as they will age and leak over time. Furthermore, due to the large number of components of such seals and their connection to one another, gaps arise, which increases the risk of leakages. Since these pressure vessels are also used for the storage and storage of hydrogen, there is a risk of explosion. In addition, the number of components makes the manufacture of such pressure vessels significantly more expensive.
In the solution according to
The object of the invention is to develop a pressure vessel that can withstand these high pressure loads of over 700 bar operating pressure, the area serving for receiving the fittings and valves does not tear out at the end faces and in which the sealing of fittings and valves against the inner container and the External reinforcement takes place reliably and by reducing the number of components of such a seal, the costs for such a container can be reduced.
Die Aufgabe der Erfindung wird durch einen Druckbehälter bestehend aus einem Innenbehälter (1) aus Kunststoff mit Stirnseiten (3,4) und einem an den Stirnseite (3,4) angeordneten Kragen (9) und aus einem Außenmantel (2) aus einer faserverstärkten Armierung, wobei zwischen Innenbehälter (1) und dem Außenmantel (2) an den Stirnseiten (3,4) Anschlusstücke (6,7) und Vertiefungen (5) für Anschlussstücke (6,7) mit, an die Wölbung der Stirnseiten (3,4) angepassten und gewölbten Flanschen (8) angeordnet sind.
Die Anschlussstücke (6,7) bestehen aus dem zylindrischen Mittelteil(13) mit einem an den zylindrischen Mittelteil (13) radial nach außen gehenden, an die Wölbung der Vertiefung (5) der Stirnseite (3,4) angepassten gewölbten Flansch (8) mit einer, an die Tiefe (a) der Vertiefung (5) angepassten Stärke, wobei im zylindrischen Mittelteil (12) eine axial Bohrung (10) und außen am unteren Ende ein, an das Innengewinde (11) des Kragens (9) angepasstes, Außengewinde (14) angeordnet ist. Das Innengewinde (11) des Kragens (9) und das Außengewinde (14) des zylindrischen Mittelteils (12) der Anschlussstückes (6,7) sind als kegliges, selbstabdichtendes Gewinde mit einer Gewindelänge, die eine formschlüssige Verbindung zwischen der Vertiefung (5) und den gewölbten Flanschen (8) erlaubt, ausgebildet.
Der Innenbehälter (1) ist mit einem in die aufgeschmolzene Außenhaut des Innenbehälters (1) eingearbeiteten Gewebe (15) versehen und in den gewölbten Flansche (8) der Anschlussstücke (6,7) sind Bohrungen (16) angeordnet, über die eine formschlüssige Verbindung durch Verschweißen des Innenbehälter (1) mit den gewölbten Flansche (8) mittels tropfenbildendes Verbrennen von Kunststoff hergestellt und der Innenbehälter (1) gegenüber den gewölbten Flansche (8) der Anschlusstücke (6,7) mit Silikon und Kleber abgedichtet ist.
Das in die Außenhaut des Innenbehälters (1) eingearbeitete Gewebe (15) ist als ein Gewebe, bevorzugt ein Bauwollgewebe oder ein Drahtgewebe aus Metall oder Kunststoff mit geringer bis mittlerer Flächendichte ausgebildet.
Die Flansche (8) werden mittels der Bohrungen (16) mit den Stirnseiten (3,4) des Innenbehälters (1) über die Bohrungen (16) mit den Vertiefungen (5) mit flüssigem aus der tropfenbildenden Verbrennung von Kunstoffen abtropfendes Kunststoff formschlüssig verschweißt verbunden und mit Silikon und Kleber abgedichtet.
Als Kunststoff sind alle bei der Verbrennung tropfenbildenden Kunststoffe, wie Polyethylene (PE) oder Polyoxymethylene (POM) oder Polyamide (PA) oder Propylene (PP) geeignet.The object of the invention is achieved by a pressure container consisting of an inner container (1) made of plastic with end faces (3, 4) and one on the end face (3,4) arranged collar (9) and an outer jacket (2) made of fiber-reinforced reinforcement, connecting pieces (6,7) and recesses between the inner container (1) and the outer jacket (2) on the end faces (3,4) (5) for connecting pieces (6, 7) with flanges (8) which are adapted and curved to the curvature of the end faces (3, 4).
The connecting pieces (6, 7) consist of the cylindrical central part (13) with a curved flange (8) which extends radially outwards to the cylindrical central part (13) and is adapted to the curvature of the depression (5) on the end face (3, 4). with a thickness adapted to the depth (a) of the depression (5), an axial bore (10) in the cylindrical middle part (12) and an outer one at the lower end, adapted to the internal thread (11) of the collar (9), External thread (14) is arranged. The internal thread (11) of the collar (9) and the external thread (14) of the cylindrical middle part (12) of the connecting piece (6, 7) are in the form of a tapered, self-sealing thread with a thread length that provides a positive connection between the recess (5) and allows the curved flanges (8), trained.
The inner container (1) is provided with a fabric (15) incorporated into the melted outer skin of the inner container (1) and bores (16) are arranged in the curved flanges (8) of the connecting pieces (6, 7), via which a positive connection by welding the inner container (1) to the curved flanges (8) by means of drop-forming burning of plastic and the inner container (1) is sealed against the curved flanges (8) of the connecting pieces (6, 7) with silicone and adhesive.
The fabric (15) worked into the outer skin of the inner container (1) is designed as a fabric, preferably a cotton fabric or a wire fabric made of metal or plastic with a low to medium areal density.
The flanges (8) are connected by means of the bores (16) to the end faces (3, 4) of the inner container (1) via the bores (16) to the depressions (5) with liquid plastic dripping from the drop-forming combustion of plastics and welded in a form-fitting manner and sealed with silicone and glue.
All plastics that form drops during combustion, such as polyethylenes (PE) or polyoxymethylenes (POM) or polyamides (PA) or propylenes (PP), are suitable as plastics.
Bei dem Verfahren zur Herstellung eines Druckbehälters aus Kunststoff mit einer faserverstärkten Armierung wird ein Innenbehälter (1) mit Stirnseiten (3, 4) und einem an den Stirnseite (3,4) angeordneten Kragen (9) sowie Vertiefungen (5) für Anschlussstücke (6,7) mittels Rotationsgießen oder Rotationssintern hergestellt. Die Außenhaut des Innenbehälters (1) wird mittels einer Heizquelle in geringer Tiefe aufgeschmolzen und ein Gewebe (15) in die aufgeschmolzene Außenhaut (17) gewickelt und/oder geklebt sowie auf das in die Außenhaut des Innenbehälters eingearbeitete Gewebe (15) eine faserverstärkte Armierung (2) aufgetragen.
Die Anschlussstücke (6,7) werden über die Bohrungen (16) in den gewölbten Flanschen (8) mittels durch die Tropfenbildung verbrennender Kunststoffstäbe entstehenden Tropfen mit den Vertiefungen (5) in den Stirnseiten (3,4) formschlüssig verschweißt und mit Silikon und Kleber abgedichtet.
Die Erfindung soll an Hand eines Beispiels näher erläutert werden, wobei die
- 1 Innenbehälter
- 2 Außenmantel aus einer faserverstärkte Armierung
- 3 Stirnseite des Innenbehälters
- 4 Stirnseite des Innenbehälters
- 5 Vertiefung in den Stirnseiten (3,4)
- 6 Anschlussstück
- 7 Anschlussstück
- 8 gewölbter Flansch der Anschlussstückes (6,7)
- 9 Kragen
- 10 axiale Bohrung im Kragen (9)
- 11 Innengewinde im Kragen (9)
- 12 zylindrisches Mittelteil der Anschlussstücke (6,7)
- 13 Innenbohrung des Mittelteils (12) der Anschlussstücke (6,7)
- 14 kegliges, selbstabdichtendes Außengewinde
- 15 Gewebe
- 16 Bohrung
- 17 aufgeschmolzene Außenhaut des Innenbehälters (1) mit Gewebe bedeuten.
The connecting pieces (6, 7) are positively welded through the bores (16) in the curved flanges (8) by means of drops created by the burning of plastic rods with the depressions (5) in the end faces (3, 4) and with silicone and adhesive sealed.
The invention will be explained in more detail using an example, the
- 1 inner container
- 2 outer jacket made of fiber-reinforced reinforcement
- 3 face of the inner container
- 4 face of the inner container
- 5 indentation in the end faces (3,4)
- 6 connector
- 7 connector
- 8 curved flange of the connection piece (6,7)
- 9 collar
- 10 axial bore in the collar (9)
- 11 internal threads in the collar (9)
- 12 cylindrical middle part of the connecting pieces (6,7)
- 13 inner bore of the middle part (12) of the connecting pieces (6,7)
- 14 tapered, self-sealing external thread
- 15 tissues
- 16 hole
- 17 mean melted outer skin of the inner container (1) with tissue.
Der Innenbehälter (1) mit seinen Stirnseiten (3,4) und den kreisrunden Vertiefungen (5) sowie dem Kragen (9) mit seiner Innenbohrung (13) und dem Innengewinde (11) werden in einem Rotationsgusszyklus aus Polyethylen oder andere Kunststoffe hergestellt. Nach der Fertigung des Innenbehälters (1) aus Polyethylen oder anderen Kunststoffen durch Rotationssintern wird die Außenhaut des Innenbehälters (1) mit einer oder mehreren Infrarotwärmequellen oder offenen Flammen oberflächlich aufgeschmolzen und in diese aufgeschmolzene Schicht (17) ein Baumwollgewebe mit einer niedrigen Flächendichte eingearbeitet.
Die metallische Anschlussstücke (6,7) mit seinem gewölbten Flanschen (8), der an die Wölbung der Vertiefung(5) der Stirnseite (3,4) angepasst ist, wird danach mit seinem Außengewinde (14) in das Innengewinde (11) des Kragens (9) eingeschraubt und dabei wird der gewölbte Flansch (8) der Anschlussstücke (6,7) gleichzeitig in die Vertiefung (5) der Stirnseite (3,4) über die Bohrungen (16) im gewölbten Flansch mittels durch flüssiges durch Verbrennen von Polyetylenstäben abtropfendes Polyethylen formschlüssig eingeschweißt und mit Silikon und Kleber abgedichtet. Beide Gewinde sind in ihrer Länge miteinander so angepasst, dass der gewölbte Flansch (8) der Anschlussstücke (6,7) formschlüssig mit den Stirnseite (3,4) des Innenbehälters (1) verschweißt und mit Silikon und Kleber abgedichtet ist.
Danach wird der Innenbehälter (1) mit den in den Stirnseiten (3,4) eingeschweißten und eingeschraubten Anschlussstücken (6,7) mit einer faserverstärkten Armierung als ein aus mit Epoxidharz getränkten Carbon- und/oder Glasfasern bestehender Außenmantel (2) formschlüssig umwickelt, wobei die oberen Enden des zylindrischen Mittelteils (13) der Anschlussstückes (6,7) von der Armierung ausgenommen werden.
Der Innenbehälter (1) kann aber auch durch andere kunststoffformende Verfahren wie Blasen, Spritzgießen, Rotationssintern usw. hergestellt werden. Die Erfindung bezieht sich also nicht allein auf den im Rotationsgießen hergestellten Innenbehälter.The inner container (1) with its end faces (3, 4) and the circular depressions (5) and the collar (9) with its inner bore (13) and the inner thread (11) are produced in a rotational molding cycle from polyethylene or other plastics. After the inner container (1) is made of polyethylene or other plastics by rotary sintering, the outer skin of the inner container (1) is melted on the surface with one or more infrared heat sources or open flames and a cotton fabric with a low surface density is incorporated into this melted layer (17).
The metallic connecting pieces (6,7) with its curved flanges (8), which is adapted to the curvature of the recess (5) on the end face (3, 4), is then with its external thread (14) into the internal thread (11) of the Collar (9) screwed and the curved flange (8) of the connecting pieces (6,7) is simultaneously in the recess (5) of the end face (3,4) through the holes (16) in the curved flange by means of liquid by burning Polyethylene rods, dripping polyethylene, welded in with a positive fit and sealed with silicone and adhesive. The length of both threads is adapted to each other in such a way that the curved flange (8) of the connecting pieces (6,7) is positively welded to the end face (3,4) of the inner container (1) and sealed with silicone and adhesive.
The inner container (1) is then wrapped with the connecting pieces (6, 7) welded and screwed into the end faces (3, 4) with a fiber-reinforced reinforcement as an outer casing (2) consisting of carbon and / or glass fibers impregnated with epoxy resin, the upper ends of the cylindrical middle part (13) of the connecting piece (6, 7) being excluded from the reinforcement.
The inner container (1) can also be produced by other plastic molding processes such as blowing, injection molding, rotary sintering, etc. The invention therefore does not relate solely to the inner container produced by rotational molding.
Mit dem erfindungsgemäßen Druckbehälter wird eine Druckbehälter geschaffen, der auf Grund seines Aufbaus für die Lagerung und Speicherung von fluiden und gasförmigen Medien für sehr hohe Drücke, insbesondere für 700 bar und darüber geeignet ist. Durch die eingesetzten Materialien, wie Polyethylen, und das Fehlen von Nähten im Innenbehälter und Fluorieren des Innenbehälters ist die Gefahr der Diffusion von Gasen durch den Innenbehälter ausgeschlossen. Damit eignet sich dieser Druckbehälter insbesondere für die Lagerung und Speicherung von Wasserstoff. Aber auch andere leichtdiffundierende Medien können gelagert und gespeichert werden.
Außerdem können durch die Ausgestaltung der Stirnseiten (3,4) beispielsweise an der Stirnseite (3) eine Armatur zum Füllen des Druckbehälters und an der Stirnseite (4) ein Manometer zum Messen des Druckes im Behälter angebracht werden.With the pressure vessel according to the invention, a pressure vessel is created which, due to its construction, is suitable for the storage and storage of fluid and gaseous media for very high pressures, in particular for 700 bar and above. Due to the materials used, such as polyethylene, and the lack of seams in the inner container and fluorination of the inner container, the risk of gases diffusing through the inner container is excluded. This is suitable this pressure vessel especially for the storage and storage of hydrogen. However, other easily diffusing media can also be stored and stored.
In addition, the design of the end faces (3, 4) allows, for example, a fitting for filling the pressure container on the end face (3) and a manometer for measuring the pressure in the container on the end face (4).
Claims (12)
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DE102018009829.0A DE102018009829B4 (en) | 2018-12-14 | 2018-12-14 | Pressure vessel and method of manufacturing the pressure vessel |
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CN115405849A (en) * | 2022-08-12 | 2022-11-29 | 佛山仙湖实验室 | IV-type hydrogen storage cylinder end sealing structure and preparation method thereof |
CN117231903A (en) * | 2023-09-28 | 2023-12-15 | 江苏理工学院 | Pressure container made of composite material of plastic liner with split valve seat and manufacturing method thereof |
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DE102022002415B4 (en) | 2022-07-04 | 2024-02-22 | Emano Kunststofftechnik Gmbh | pressure vessel |
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Also Published As
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DE102018009829A1 (en) | 2020-06-18 |
PL3667154T3 (en) | 2021-11-22 |
EP3667154B1 (en) | 2021-05-12 |
DE102018009829B4 (en) | 2020-09-17 |
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