EP0821194B1 - Composite pressure vessel with a plastic liner for the storage of pressurized gaseous fluids - Google Patents

Composite pressure vessel with a plastic liner for the storage of pressurized gaseous fluids Download PDF

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Publication number
EP0821194B1
EP0821194B1 EP97250216A EP97250216A EP0821194B1 EP 0821194 B1 EP0821194 B1 EP 0821194B1 EP 97250216 A EP97250216 A EP 97250216A EP 97250216 A EP97250216 A EP 97250216A EP 0821194 B1 EP0821194 B1 EP 0821194B1
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EP
European Patent Office
Prior art keywords
liner
neck
region
neck piece
composite
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.)
Expired - Lifetime
Application number
EP97250216A
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German (de)
French (fr)
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EP0821194A3 (en
EP0821194A2 (en
Inventor
Christian Dr. Rasche
Klaus Dipl.-Ing. Lange
Dieter Dipl.-Ing. Heisterkamp
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MCS INTERNATIONAL GMBH
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mcs International GmbH
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Publication date
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Publication of EP0821194A3 publication Critical patent/EP0821194A3/en
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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
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/16—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge constructed of plastics materials
    • 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
    • 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
    • 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

Definitions

  • the invention relates to a composite pressure vessel for storing gaseous media under pressure with a plastic liner according to the Preamble of the main claim.
  • US-PS 3,508,677 is a composite pressure vessel for storing known gaseous media under pressure.
  • This pressure vessel has a liner Plastic that is reinforced with a fiber composite material.
  • the neck area is each provided with an opening in which an opening that closes the opening and / or sealing neck piece is arranged.
  • One neck piece is designed so that it can accommodate a screw-in valve with a cylindrical thread.
  • Anchoring the neck piece with the container has this in the container facing end area on a flat, frustoconical collar.
  • the collar is made of elements of the liner and / or the reinforcing winding surround.
  • a central axis extends into the neck from the inside as a symmetrical axis enclosing recess, which in the case of the valve neck piece passes into the bore of the valve screwing area.
  • a disadvantage of this Construction is that the collar is very sharp and thus in the Corners high voltage peaks arise, which with appropriate thermal and / or mechanical stress can lead to leaks.
  • the generic EP 0 550 shows a somewhat different construction of the neck piece 951 A1.
  • the collar is carefully rounded and also the transitions in the Body of the neck piece. So that the liner is largely form-fitting with the neck piece can be connected, are usually in the collar area at least on the underside at least one annular recess is also provided on the upper side. This makes the neckpiece more expensive and complicates the assembly.
  • Figure 3 is on the inside of the neck piece in the Recess of the collar is provided with a latching tulip-like insert is clamped at the top by a screw-in clamping ring. Through this Construction improves the seal in the neck area, but it is very complex and requires a large number of individual parts, which are manufactured separately Need to become. The weak point of the construction remains the inadequate Connection of the liner to the tulip-like insert.
  • the object of the invention is to provide a generic composite pressure vessel Storage of gaseous media under pressure with a plastic liner specify the independent with a simple and inexpensive connection whether made of metal or plastic neck pieces on the container domes of the Plastic core container a long-term gastight seal even under combined changing mechanical and thermal load and the valve receiving container dome without the prescribed valve torque Can absorb impairment.
  • the anchoring is between liners and neck piece improved
  • the collar has at least two symmetrical the circumferentially arranged axially extending holes into which the liner engages like a cone.
  • the critical sealing area in the cylindrical part of the Neck piece is the arrangement of at least one lying on the inside provided annular groove in which the liner engages in a form-fitting manner.
  • the valve provided neck piece preferably two in the axial Spaced annular grooves are provided.
  • the neck piece intended for receiving a valve
  • the neck piece clamping ring which is in the cylindrical portion of the neck piece extending end portion of the liner under Pressure pressed against the inside of the neck piece.
  • the clamping ring has a thread-free in a known manner frustoconical area with a corresponding one on the End region of the liner arranged on the inside of the liner interacts.
  • More or less deeply Clamping ring can be a desired preload for the end area of the liner generated, and thus counteracts thermal expansion or contraction become.
  • this has in known manner on a hexagon socket, so that defined torques applied and arithmetically the required flank pressure of the clamping ring can be traced.
  • the gas-tight seal on the valve opposite side can be reached in such a way that the liner in leaves this area closed.
  • a critical area of the previously known composite pressure vessels is the Transition area of the liner between the cylindrical jacket and the Neck area. A significant improvement is achieved if how proposed that this area is isotensoidally formed. The corresponds to continuously curved course of approximation of one of many individual Sections of an existing polygonal train. Advantage of the proposed training this transition area is that under load for the fiber reinforced Pressure vessel overall is an optimal state of tension in the transition from cylindrical container part to the metal end piece results in at the same time minimal use of the reinforcing fiber composite and maximum burst pressure.
  • the seal in the area of the clamping ring can be improved in this way be when you are in the contact area between the clamping ring and liner provides highly elastic sealant. This is used up in a way so that it is ensured that in particular the critical transition area between the frustoconical section and the threaded section of the clamping ring are sealed is.
  • the two neck areas of a composite pressure vessel 1 are shown in a half-sided longitudinal section. It consists of a plastic liner 2 produced by blow molding or rotation or thermoforming, which is reinforced by a fiber winding 3 wound from the outside.
  • the reinforcing wrap consists of a fiber reinforcement, for example carbon, aramid, glass, boron, Al 2 O 3 fibers or mixtures (hybrid game), which are contained in a matrix of thermosets, e.g. B. epoxy or phenolic resins etc. or in thermoplastics such. B. PA12, PA6, PP etc. are embedded.
  • the fiber composite material consisting of the above-mentioned fibers and polymers, is applied both in the axial and in the tangential direction of the container, i.e. the fiber reinforcement body (FRP) or the orientation of the fiber longitudinal axes have a small angle (0 °) in the case of axial wrapping in the cylindrical container part up to 60 °) with respect to the longitudinal axis of the container.
  • the pole caps of the plastic liner 2 are wound evenly.
  • the FRP is only deposited tangentially or in the circumferential direction of the cylindrical container part, consisting of both axial and tangential parts of the wrapping, but around the pole caps there is only wrapping in the axial direction.
  • the wall thickness proportions of tangential wrapping and axial wrapping depend on the outer diameter of the plastic liner 2, on the strength of the FRP, on the winding angles etc.
  • the composite pressure vessel 1 has openings in the neck area, each with a Neck piece 4.5 are sealed.
  • the neck piece 5 opposite the valve has in a known manner on a frustoconical collar 6, which in The edge area is very rounded and its inclination matches the contour of the liner 2 is adjusted.
  • the liner 2 in whole on the bottom 7 of the collar 6 to the system.
  • To reinforce the Anchoring has the collar 6 axially extending bores 8 into which the liner 2 engages like a cone. A total of four bores are preferably arranged are arranged symmetrically over the circumference.
  • the liner 2 is in this Area of the neck piece 5 closed, so that no sealing problem occurs here.
  • an annular groove 9 into which the liner material intervenes positively is also be two or more grooves.
  • the Recess 12 on the end face of the neck piece 5 serves to receive a Holding means, for example, a Reitdomspitze. This is when winding the Container 1 required for inclusion in the rotating device of the winding system.
  • the collar 6 of the neck piece 4 faces axially running holes 8, preferably four, symmetrically over the circumference distributed.
  • the additional anchoring is also carried out via annular grooves 9, 10 in thread-free part 14 of the neck piece 4.
  • the seal is designed differently of the end region 13 of the liner 2.
  • a clamping ring 15 pressed onto the end region 13 of the liner 2.
  • the clamping ring 15 has one Threaded portion 16 and a thread-free truncated cone Section 17.
  • the latter section 17 corresponds to the bevel of the end area 13 of the liner 2.
  • the clamping ring 15 can be rotated, it has an internal hexagon 18.
  • a selected prestress is applied to the end region 13 of the liner 2.
  • the arrangement described requires a cylindrical configuration of the Threaded portion 19 of the neck piece 4. This in turn means that also Valve 20 must also have a cylindrical thread.
  • an annular groove 21 into which a seal 22 can be fixed.
  • the critical one because of the tension Transition area 30 from the cylindrical jacket 11 to the neck area of the liner 2 is trained iso-tensoid.
  • the continuously curved profile shown here is an approximation of a polygonal train consisting of many sections. The Such a curve is determined using many small iterative steps.
  • FIG. 3 shows a representation that is comparable to that of FIG. 1 Embodiment of the valve connection, the same for the same parts Reference numerals have been chosen.
  • the thread-free part 23 of the neck piece 25 extends inside the container. This has the advantage that the container length accordingly overall is getting shorter. It is necessary with this arrangement that the liner 2 around the thread-free part 23 is guided around.
  • the other elements are the same as in Figure 1, so that there is no need to repeat the explanation.
  • FIGs 4a, b is on an enlarged scale and in a plan view with the End region 13 of the liner 2 (Fig. 1) cooperating clamping ring 15 shown.
  • the hexagon socket 18 is used to insert a hexagon key, so that the Clamping ring 15 can be rotated accordingly. So that the rotation is sensitive can take place, the threaded portion 16 is provided with a fine thread.
  • the diameter of the bore 28 arranged below the hexagon 18 is Adjusted bore of the end portion 13 of the liner 2.

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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

The bottle has two neck-sections, together with a winding of composite fibrous material reinforcing the liner (2). A valve with parallel thread screws into one or both sections, each of which has an end towards the bottle of flat truncated-cone section with a radiused edge and is inclined to match the liner at the join between the neck and the cylindrical casing. A clamping ring screws into the neck, having an external threaded portion onto which a plain truncated-cone one joins, working against the end of a seal so as to press it against the inside of the neck. The liner bears against the entire underside of the collar (6) on the neck (4). The collar contains two or more axial drillings (8) evenly spaced round the periphery and in which bosses on the liner fit. The cylindrical portion (14) of the neck section has one or more annular grooves (9,10) on the inside and in which the liner engages. The clamping ring (15) presses the portion (13) of the liner extending inside the neck section against the latter's inside surface.

Description

Die Erfindung betrifft einen Composite-Druckbehälter zur Speicherung von gasförmigen Medien unter Druck mit einem Liner aus Kunststoff gemäß dem Oberbegriff des Hauptanspruches.The invention relates to a composite pressure vessel for storing gaseous media under pressure with a plastic liner according to the Preamble of the main claim.

Aus der US-PS 3,508,677 ist ein Composite-Druckbehälter zur Speicherung von gasförmigen Medien unter Druck bekannt. Dieser Druckbehälter weist einen Liner aus Kunststoff auf, der mit einem Faserverbundwerkstoff verstärkt wird. Der Halsbereich ist mit je einer Öffnung versehen, in der ein die Öffnung verschließendes und/oder abdichtendes Halsstück angeordnet ist. Das eine Halsstück ist so ausgebildet, daß es ein einschraubbares Ventil mit einem zylindrischen Gewinde aufnehmen kann. Zur Verankerung des Halsstückes mit dem Behälter weist dieses in dem den Behälter zugewandten Endbereich einen flachverlaufenden, kegelstumpfartigen Kragen auf. Der Kragen ist von Elementen des Liner und/oder der verstärkenden Wicklung umgeben. Von der Innenseite her erstreckt sich in das Halsstück eine die Mittelachse als Symmetrieachse einschließende Ausnehmung, die im Falle des Ventil-Halsstückes in die Bohrung des Ventileinschraubbereiches übergeht. Nachteilig bei dieser Konstruktion ist, daß der Kragen sehr scharfkantig ausgebildet ist und dadurch in den Ecken hohe Spannungsspitzen entstehen, die bei entsprechender thermischer und/oder mechanischer Belastung zu Undichtigkeiten führen können. Darüber hinaus ist die Anbindung der Metall-Halsstücke an den Linerwerkstoff, die chemisch in Form eines Komponenten-Klebers vorgesehen ist, unzureichend. Bei dieser Art von Anbindung ist sowohl bei thermischen als auch bei mechanischen Lastwechseln mit einer raschen Ablösung der Halsstücke von dem Polymer-Liner zu rechnen, was zu erhöhten Permeationsraten bzw. Leckageraten und zu einer unzureichenden Verdrehsicherung des Halsstückes führt. Dabei ist zu berücksichtigen, daß je nach Abmessung das aufzubringende Ventildrehmoment bei einigen Hundert Nm liegt.From US-PS 3,508,677 is a composite pressure vessel for storing known gaseous media under pressure. This pressure vessel has a liner Plastic that is reinforced with a fiber composite material. The neck area is each provided with an opening in which an opening that closes the opening and / or sealing neck piece is arranged. One neck piece is designed so that it can accommodate a screw-in valve with a cylindrical thread. to Anchoring the neck piece with the container has this in the container facing end area on a flat, frustoconical collar. The collar is made of elements of the liner and / or the reinforcing winding surround. A central axis extends into the neck from the inside as a symmetrical axis enclosing recess, which in the case of the valve neck piece passes into the bore of the valve screwing area. A disadvantage of this Construction is that the collar is very sharp and thus in the Corners high voltage peaks arise, which with appropriate thermal and / or mechanical stress can lead to leaks. Furthermore is the connection of the metal neck pieces to the liner material, which is chemically in shape a component adhesive is provided, insufficient. With this type of Connection is with both thermal and mechanical load changes with a rapid detachment of the neck pieces from the polymer liner is expected increased permeation rates or leakage rates and an insufficient Protection against rotation of the neck piece leads. It should be noted that depending on Dimension the valve torque to be applied is a few hundred Nm.

Eine etwas andere Konstruktion des Halsstückes zeigt die gattungsbildende EP 0 550 951 A1. Hier ist der Kragen sorgfältig abgerundet und auch die Übergänge in den Körper des Halsstückes. Damit der Liner weitgehend formschlüssig mit dem Halsstück verbindbar ist, sind.in dem Kragenbereich mindestens auf der Unterseite meistens auch auf der Oberseite wenigstens eine ringförmige Ausnehmung vorgesehen. Dies verteuert die Herstellung des Halsstückes und erschwert die Montage. Bei einer weiteren Ausführungsform (Figur 3) ist auf der Innenseite des Halsstückes ein in die Ausnehmung des Kragens einrastender tulpenartiger Einsatz vorgesehen, der von oben her durch einen einschraubbaren Klemmring verspannt wird. Durch diese Konstruktion wird zwar die Abdichtung im Halsbereich verbessert, sie ist aber sehr aufwendig und beansprucht eine Vielzahl von Einzelteilen, die gesondert hergestellt werden müssen. Schwachpunkt der Konstruktion bleibt aber die unzureichende Anbindung des Liners an den tulpenartigen Einsatz.The generic EP 0 550 shows a somewhat different construction of the neck piece 951 A1. Here the collar is carefully rounded and also the transitions in the Body of the neck piece. So that the liner is largely form-fitting with the neck piece can be connected, are usually in the collar area at least on the underside at least one annular recess is also provided on the upper side. This makes the neckpiece more expensive and complicates the assembly. At a Another embodiment (Figure 3) is on the inside of the neck piece in the Recess of the collar is provided with a latching tulip-like insert is clamped at the top by a screw-in clamping ring. Through this Construction improves the seal in the neck area, but it is very complex and requires a large number of individual parts, which are manufactured separately Need to become. The weak point of the construction remains the inadequate Connection of the liner to the tulip-like insert.

Aufgabe der Erfindung ist es, einen gattungsmäßigen Composite-Druckbehälter zur Speicherung von gasförmigen Medien unter Druck mit einem Liner aus Kunststoff anzugeben, der bei einer einfachen und kostengünstigen Anbindung der unabhängig ob aus Metall oder aus Kunststoff gefertigten Halsstücke an die Behälterdome des Kunststoffkernbehälters eine langzeitig gasdichte Abdichtung auch unter kombinierter wechselnder mechanischer und thermischer Belastung aufweist und der das Ventil aufnehmende Behälterdom das vorgeschriebene Ventildrehmoment ohne Beeinträchtigung aufnehmen kann.The object of the invention is to provide a generic composite pressure vessel Storage of gaseous media under pressure with a plastic liner specify the independent with a simple and inexpensive connection whether made of metal or plastic neck pieces on the container domes of the Plastic core container a long-term gastight seal even under combined changing mechanical and thermal load and the valve receiving container dome without the prescribed valve torque Can absorb impairment.

Diese Aufgabe wird mit den im kennzeichnenden Teil des Anspruches 1 angegebenen Merkmalen gelöst. Vorteilhafte Weiterbildungen sind Bestandteil von Unteransprüchen.This object is achieved with the in the characterizing part of claim 1 specified features solved. Advantageous further training is part of Dependent claims.

Im Unterschied zum bekannten Stand der Technik ist die Verankerung zwischen Liner und Halsstück verbessert Dazu weist der Kragen mindestens zwei symmetrisch über den Umfang verteilt angeordnete axial verlaufende Bohrungen auf, in die der Liner zapfenartig eingreift. Für den kritischen Abdichtbereich im zylindrischen Teil des Halsstückes ist die Anordnung mindestens einer auf der Innenseite liegenden ringförmigen Nut vorgesehen, in die der Liner formschlüssig eingreift. Um einen vergleichbaren Effekt wie eine Labyrinthdichtung zu erreichen, sind in dem zur Aufnahme des Ventils vorgesehenen Halsstückes vorzugsweise zwei im axialen Abstand voneinander liegende ringförmige Nuten vorgesehen. Darüber hinaus wird beim zur Aufnahme eines Ventils vorgesehenen Halsstück mittels eines an sich bekannten, in das Halsstück einschraubbaren Klemmringes, der sich in den zylindrischen Abschnitt des Halsstückes erstreckende Endbereich des Liners unter Druck an den Innenbereich des Halsstückes gepreßt. Dies hat den Vorteil, daß nicht nur bei hohen Innendrücken, sondern auch bei niedrigen Innendrücken der kritische Endbereich des Liners unter Spannung anliegt. Damit dieser Effekt möglichst wirkungsvoll ist, weist in bekannter Weise der Klemmring einen gewindefreien kegelstumpfartigen Bereich auf, der mit einer eine korrespondierende auf der Innenseite des Liners angeordnete Schräge aufweisenden Endbereich des Liners zusammenwirkt. Durch entsprechendes mehr oder weniger tiefes Hineindrehen des Klemmringes kann eine gewünschte Vorspannung für den Endbereich des Liners erzeugt, und so thermischen Ausdehnungen bzw. Kontraktionen entgegengewirkt werden. Um den Klemmring in einfacher Weise drehen zu können, weist dieser in bekannter Weise einen Innensechskant auf, so daß definierte Drehmomente aufgebracht und rechnerisch die erforderliche Flankenpressung des Klemmrings nachvollzogen werden können. Die gasdichte Abdichtung auf der dem Ventil gegenüberliegenden Seite kann man in der Weise erreichen, daß man den Liner in diesem Bereich geschlossen läßt.In contrast to the known prior art, the anchoring is between liners and neck piece improved To this end, the collar has at least two symmetrical the circumferentially arranged axially extending holes into which the liner engages like a cone. For the critical sealing area in the cylindrical part of the Neck piece is the arrangement of at least one lying on the inside provided annular groove in which the liner engages in a form-fitting manner. To one To achieve a comparable effect as a labyrinth seal are in the Receiving the valve provided neck piece preferably two in the axial Spaced annular grooves are provided. Beyond that in the neck piece intended for receiving a valve, by means of an intrinsically known, screwable into the neck piece clamping ring, which is in the cylindrical portion of the neck piece extending end portion of the liner under Pressure pressed against the inside of the neck piece. This has the advantage that not the critical only at high internal pressures, but also at low internal pressures End area of the liner is under tension. So that this effect is possible is effective, the clamping ring has a thread-free in a known manner frustoconical area with a corresponding one on the End region of the liner arranged on the inside of the liner interacts. By turning the. More or less deeply Clamping ring can be a desired preload for the end area of the liner generated, and thus counteracts thermal expansion or contraction become. In order to be able to turn the clamping ring in a simple manner, this has in known manner on a hexagon socket, so that defined torques applied and arithmetically the required flank pressure of the clamping ring can be traced. The gas-tight seal on the valve opposite side can be reached in such a way that the liner in leaves this area closed.

Zur Verringerung der Baulänge des Druckbehälters wird weiterbildend vorgeschlagen, den zylindrischen Bereich des Halsstückes zusammen mit den ringförmigen Nuten in den Behälter hinein erstrecken zu lassen, wobei der Liner dann diesen innenliegenden Bereich völlig umschließt.In order to reduce the overall length of the pressure vessel, it is further proposed that the cylindrical portion of the neck piece together with the annular grooves in to let the container extend into it, the liner then completely encloses the inner area.

Einen kritischen Bereich der bisher bekannten Composite-Druckbehälter stellt der Übergangsbereich des Liners zwischen dem zylindrischen Mantel und dem Halsbereich dar. Eine erhebliche Verbesserung wird dann erreicht, wenn, wie vorgeschlagen, dieser Bereich iso-tensoidisch ausgebildet wird. Dabei entspricht der kontinuierlich gekrümmte Verlauf der approximation eines aus vielen einzelnen Abschnitten bestehenden Polygonalzuges. Vorteil der vorgeschlagenen Ausbildung dieses Übergangsbereiches ist, daß unter Belastung für den faserverstärkten Druckbehälter insgesamt sich ein optimaler Spannungszustand im Übergang von zylindrischem Behälterteil bis zum metallischen Schlußstück ergibt bei gleichzeitig minimaler Einsatzmenge des verstärkenden Faserverbundwerkstoffes und maximalem Berstdruck .A critical area of the previously known composite pressure vessels is the Transition area of the liner between the cylindrical jacket and the Neck area. A significant improvement is achieved if how proposed that this area is isotensoidally formed. The corresponds to continuously curved course of approximation of one of many individual Sections of an existing polygonal train. Advantage of the proposed training this transition area is that under load for the fiber reinforced Pressure vessel overall is an optimal state of tension in the transition from cylindrical container part to the metal end piece results in at the same time minimal use of the reinforcing fiber composite and maximum burst pressure.

Die Abdichtung im Bereich des Klemmringes kann in der Weise noch verbessert werden, wenn man in der Kontaktfläche zwischen Klemmring und Liner ein hochelastisches Dichtmittel vorsieht. Dieses wird in einer Art und Weise aufgebraucht, so daß sichergestellt ist, daß insbesondere der kritische Übergangsbereich zwischen dem kegelstumpfartigen Abschnitt und dem Gewindeabschnitt des Klemmringes dicht ist.The seal in the area of the clamping ring can be improved in this way be when you are in the contact area between the clamping ring and liner provides highly elastic sealant. This is used up in a way so that it is ensured that in particular the critical transition area between the frustoconical section and the threaded section of the clamping ring are sealed is.

In der Zeichnung wird anhand zweier Ausführungsbeispiele der erfindungsgemäße Composite-Druckbehälter näher erläutert.
Es zeigen:

Fig. 1
im halbseitigen Längsschnitt der das Ventil aufnehmende Halsbereich eines erfindungsgemäßen Composite-Druckbehälters
Fig. 2
im gleichen halbseitigen Längsschnitt wie Fig. 1 der gegenüberliegende Halsbereich
Figur 3
wie Figur 1, jedoch eine andere Ausführungsform des Ventil-Halsbereiches für kleinere Flaschenabmessungen
Figur 4a,b
im vergrößerten Maßstab einen Querschnitt und eine Draufsicht des Klemmringes
In the drawing, the composite pressure vessel according to the invention is explained in more detail using two exemplary embodiments.
Show it:
Fig. 1
in the half-sided longitudinal section of the neck area of a composite pressure vessel according to the invention that receives the valve
Fig. 2
in the same half-sided longitudinal section as Fig. 1, the opposite neck area
Figure 3
like Figure 1, but a different embodiment of the valve neck area for smaller bottle dimensions
Figure 4a, b
on a larger scale a cross section and a top view of the clamping ring

In den Figuren 1, 2 sind in einem halbseitigen Längsschnitt die beiden Halsbereiche eines erfindungsgemäßen Composite-Druckbehälters 1 dargestellt. Er besteht aus einem über Blasformen oder Rotationsverfahren oder Thermoformverfahren hergestellten Kunststoff-Liner 2, der durch eine von außen aufgewickelte Faserwicklung 3 verstärkt wird. Beispielsweise besteht die verstärkende Umwicklung aus einer Faserverstärkung, z. b. Kohlenstoff,-Aramid,-Glas,-Bor,-Al2O3-Fasem oder Gemischen (Hybridgame) hieraus, die in einer Matrix aus Duromeren, z. B. Epoxidoder Phenolharzen etc. oder in Thermoplasten z. B. PA12, PA6, PP etc. eingebettet sind. Der Faserverbundwerkstoff, bestehend aus o. g. Fasern und Polymeren, wird sowohl in axialer als auch in tangentialer Richtung des Behälters aufgebracht, d. h. der Faserverstärkungskörper (FVK) bzw. die Ausrichtung der Faserlängsachsen weisen im Fall der axialen Umwicklung im zylindrischen Behälterteil einen kleinen Winkel (0° bis 60°) gegenüber der Behälterlängsachse auf. Mit Hilfe der axialen Bewicklung werden auch die Polkappen des Kunststoff-Liners 2 gleichmäßig bewickelt. Vorher, alternierend oder nach dieser Polkappenwicklung erfolgt die Ablage des FVK's ausschließlich tangential bzw. in Umfangsrichtung des zylindrischen Behältersteils sowohl aus axialen als auch tangentialen Umwicklungsanteilen bestehend, um die Polkappen jedoch erfolgt nur eine Umwicklung in axialer Richtung. Die Wanddickenanteile von tangentialer Umwicklung und axialer Umwicklung hängen ab vom Außendurchmesser des Kunststoffliners 2, von der Festigkeit des FVK's, von den Wickelwinkeln etc..In Figures 1, 2, the two neck areas of a composite pressure vessel 1 according to the invention are shown in a half-sided longitudinal section. It consists of a plastic liner 2 produced by blow molding or rotation or thermoforming, which is reinforced by a fiber winding 3 wound from the outside. For example, the reinforcing wrap consists of a fiber reinforcement, for example carbon, aramid, glass, boron, Al 2 O 3 fibers or mixtures (hybrid game), which are contained in a matrix of thermosets, e.g. B. epoxy or phenolic resins etc. or in thermoplastics such. B. PA12, PA6, PP etc. are embedded. The fiber composite material, consisting of the above-mentioned fibers and polymers, is applied both in the axial and in the tangential direction of the container, i.e. the fiber reinforcement body (FRP) or the orientation of the fiber longitudinal axes have a small angle (0 °) in the case of axial wrapping in the cylindrical container part up to 60 °) with respect to the longitudinal axis of the container. With the help of the axial winding, the pole caps of the plastic liner 2 are wound evenly. Before, alternating or after this pole cap winding, the FRP is only deposited tangentially or in the circumferential direction of the cylindrical container part, consisting of both axial and tangential parts of the wrapping, but around the pole caps there is only wrapping in the axial direction. The wall thickness proportions of tangential wrapping and axial wrapping depend on the outer diameter of the plastic liner 2, on the strength of the FRP, on the winding angles etc.

Der Composite-Druckbehälter 1 weist im Halsbereich Öffnungen auf, die je mit einem Halsstück 4,5 abgedichtet sind. Das dem Ventil gegenüberliegende Halsstück 5 weist in bekannter Weise einen kegelstumpfartig ausgebildeten Kragen 6 auf, der im Randbereich stark abgerundet ist und dessen Neigung dem Konturverlauf des Liners 2 angepaßt ist. Im Unterschied zum bekannten Stand der Technik kommt der Liner 2 in Gänze an der Unterseite 7 des Kragens 6 zur Anlage. Zur Verstärkung der Verankerung weist der Kragen 6 axial verlaufende Bohrungen 8 auf, in die der Liner 2 zapfenartig eingreift. Vorzugsweise sind insgesamt vier Bohrungen angeordnet, die symmetrisch über den Umfang verteilt angeordnet sind. Der Liner 2 ist in diesem Bereich des Halsstückes 5 geschlossen, so daß hier kein Abdichtproblem auftritt. Um die Verankerung des Liners 2 mit dem Halsstück 5 zu verstärken, weist das Halsstück 5 in diesem Ausführungsbeispiel eine ringförmige Nut 9 auf, in die das Linermaterial formschlüssig eingreift. Alternativ können es auch zwei oder mehr Nuten sein. Die Ausnehmung 12 auf der Stirnfläche des Halsstückes 5 dient zur Aufnahme eines Haltemittels beispielsweise eine Reitdomspitze. Diese wird beim Wickeln des Behälters 1 zur Aufnahme in die Drehvorrichtung der Wickelanlage benötigt.The composite pressure vessel 1 has openings in the neck area, each with a Neck piece 4.5 are sealed. The neck piece 5 opposite the valve has in a known manner on a frustoconical collar 6, which in The edge area is very rounded and its inclination matches the contour of the liner 2 is adjusted. In contrast to the known prior art, the liner 2 in whole on the bottom 7 of the collar 6 to the system. To reinforce the Anchoring has the collar 6 axially extending bores 8 into which the liner 2 engages like a cone. A total of four bores are preferably arranged are arranged symmetrically over the circumference. The liner 2 is in this Area of the neck piece 5 closed, so that no sealing problem occurs here. Around to strengthen the anchoring of the liner 2 with the neck piece 5 has the neck piece 5 in this embodiment, an annular groove 9 into which the liner material intervenes positively. Alternatively, it can also be two or more grooves. The Recess 12 on the end face of the neck piece 5 serves to receive a Holding means, for example, a Reitdomspitze. This is when winding the Container 1 required for inclusion in the rotating device of the winding system.

Auf der Ventilseite sind die zuvor beschriebenen grundlegenden Elemente der Verankerung die gleichen. Auch hier weist der Kragen 6 des Halsstückes 4 axial verlaufende Bohrungen 8 auf, vorzugsweise vier, symmetrisch über den Umfang verteilt. Die zusätzliche Verankerung erfolgt ebenfalls über ringförmige Nuten 9, 10 im gewindefreien Teil 14 des Halsstückes 4. Anders gestaltet ist dagegen die Abdichtung des Endbereiches 13 des Liners 2. Um eine ausreichende Anpressung des Endbereiches 13 an den Innenbereich des gewindefreien Teils 14 des Halsstückes 4 im Sinne einer ausreichenden Abdichtung zu gewährleisten, wird ein Klemmring 15 auf den Endbereich 13 des Liners 2 gepreßt. Der Klemmring 15 weist einen Gewindeabschnitt 16 und einen gewindefreien kegelstumpfartig ausgebildeten Abschnitt 17 auf. Der letztgenannte Abschnitt 17 korrespondiert mit der Anschrägung des Endbereiches 13 des Liners 2. Damit der Klemmring 15 gedreht werden kann, weist er einen Innensechskant 18 auf. Je nach Drehung des Klemmringes 15 kann auf den Endbereich 13 des Liners 2 eine gewählte Vorspannung aufgebracht werden. Die beschriebene Anordnung erfordert eine zylindrische Ausgestaltung des Gewindeabschnittes 19 des Halsstückes 4. Dies wiederum bedeutet, daß auch das Ventil 20 ebenfalls ein zylindrisches Gewinde aufweisen muß. Zur Abdichtung des Ventils 20 ist in der Stimfläche des Halsstückes 4 eine Ringnut 21 angeordnet, in die eine Dichtung 22 festlegbar ist. Der von den Spannungsverhältnissen her kritische Übergangsbereich 30 vom zylindrischen Mantel 11 zum Halsbereich des Liners 2 ist iso-tensoidisch ausgebildet. Der hier dargestellte kontinuierlich gekrümmte Verlauf ist eine approximation eines aus vielen Abschnitten bestehenden Polygonalzuges. Die Ermittlung eines solchen Kurvenverlaufes erfolgt über viele kleine iterative Schritte.On the valve side are the basic elements of the previously described Anchoring the same. Here, too, the collar 6 of the neck piece 4 faces axially running holes 8, preferably four, symmetrically over the circumference distributed. The additional anchoring is also carried out via annular grooves 9, 10 in thread-free part 14 of the neck piece 4. In contrast, the seal is designed differently of the end region 13 of the liner 2. In order to ensure that the End region 13 to the inner region of the thread-free part 14 of the neck piece 4 To ensure adequate sealing, a clamping ring 15 pressed onto the end region 13 of the liner 2. The clamping ring 15 has one Threaded portion 16 and a thread-free truncated cone Section 17. The latter section 17 corresponds to the bevel of the end area 13 of the liner 2. So that the clamping ring 15 can be rotated, it has an internal hexagon 18. Depending on the rotation of the clamping ring 15 can a selected prestress is applied to the end region 13 of the liner 2. The arrangement described requires a cylindrical configuration of the Threaded portion 19 of the neck piece 4. This in turn means that also Valve 20 must also have a cylindrical thread. To seal the Valve 20 is arranged in the end face of the neck piece 4, an annular groove 21 into which a seal 22 can be fixed. The critical one because of the tension Transition area 30 from the cylindrical jacket 11 to the neck area of the liner 2 is trained iso-tensoid. The continuously curved profile shown here is an approximation of a polygonal train consisting of many sections. The Such a curve is determined using many small iterative steps.

Figur 3 zeigt in einer vergleichbaren Darstellung wie Figur 1 eine andere Ausführungsform des Ventilanschlusses, wobei für gleiche Teile gleiche Bezugszeichen gewählt worden sind.FIG. 3 shows a representation that is comparable to that of FIG. 1 Embodiment of the valve connection, the same for the same parts Reference numerals have been chosen.

Im Unterschied zu Figur 1 erstreckt sich der gewindefreie Teil 23 des Halsstückes 25 nach innen in den Behälter. Dies hat den Vorteil, daß entsprechend die Behälterlänge insgesamt kürzer wird. Erforderlich bei dieser Anordnung ist, daß der Liner 2 um den gewindefreien Teil 23 herumgeführt wird. Die übrigen Elemente sind gleich wie in Figur 1, so daß sich eine Wiederholung der Erläuterung erübrigt.In contrast to FIG. 1, the thread-free part 23 of the neck piece 25 extends inside the container. This has the advantage that the container length accordingly overall is getting shorter. It is necessary with this arrangement that the liner 2 around the thread-free part 23 is guided around. The other elements are the same as in Figure 1, so that there is no need to repeat the explanation.

In den Figuren 4a,b ist im vergrößerten Maßstab und in einer Draufsicht der mit dem Endbereich 13 des Liners 2 (Fig. 1) zusammenwirkende Klemmring 15 dargestellt. Der Innensechskant 18 dient zum Einstecken eines Sechskantschlüssels, so daß der Klemmring 15 entsprechend gedreht werden kann. Damit die Drehung feinfühlig erfolgen kann, ist der Gewindeabschnitt 16 mit einem Feingewinde versehen. Der Durchmesser der unterhalb des Sechskant 18 angeordneten Bohrung 28 ist der Bohrung des Endbereiches 13 des Liners 2 angepaßt.In Figures 4a, b is on an enlarged scale and in a plan view with the End region 13 of the liner 2 (Fig. 1) cooperating clamping ring 15 shown. The hexagon socket 18 is used to insert a hexagon key, so that the Clamping ring 15 can be rotated accordingly. So that the rotation is sensitive can take place, the threaded portion 16 is provided with a fine thread. The The diameter of the bore 28 arranged below the hexagon 18 is Adjusted bore of the end portion 13 of the liner 2.

Claims (9)

  1. Composite pressurised container for the storage of gaseous media under pressure having a plastics liner (2) and two neck pieces (4, 5, 25) disposed in the neck region and having a coil of a composite fibre material (3) to reinforce the liner (2), at least one of which is formed to receive a screw-in valve (20) having a cylindrical thread and both neck pieces (4, 5, 25) are provided in the end region associated with the pressurised container with a plane frustoconical collar (6), whose edge is much rounded and whose incline matches the contour of the liner (2) in the transition region from the cylindrical casing region (14) to the neck region, wherein in the region of the upper face of the collar (6) abutting the neck piece (4, 5, 25) the reinforcing coil (3) comes to bear and in the peripheral region of the upper face and of the under-side of the collar (6) the liner comes to bear, and wherein in the neck piece (4, 5, 25) a clamp ring (15) is provided, which can be screwed into the said neck piece and has a threaded section (16) on the outer casing, which a thread-free, frustoconical section (17) abuts, wherein the section (17) cooperates with the end region (13) of a sealing element extending from the inner face of the pressurised container and this end region (13) thus comes to bear on the inner face of the neck piece (4, 5, 25), characterised in that the liner (2) comes to bear over the entire area of the under-side (7) of the collar (6) of the neck piece (4, 5, 25) and the collar (6) has two axially extending bores (8) distributed symmetrically around the circumference, into which the liner (2) engages like a peg and the cylindrical region (14) of the neck piece (4, 5, 25) has on the inner face at least one annular groove (9, 10), into which the liner engages positively, and in the neck piece (4, 25) provided to receive a valve (20) by means of the clamp ring (15) the end region (13) of the liner (2) extending in the cylindrical section (14) of the neck piece (4, 25) comes to bear under pressure on the inner region of the neck piece (4, 25).
  2. Composite pressurised container according to claim 1, characterised in that four bores (8) are provided in the collar (6).
  3. Composite pressure container according to claim 1 and 2, characterised in that two axially spaced annular grooves (9, 10) are provided in the cylindrical section (14) of the neck piece (4) provided to receive a valve (20).
  4. Composite pressurised container according to one of claims 1 to 3, characterised in that the frustoconical section (17) of the clamp ring (15) cooperates with the end region (13) of the liner (2) having a corresponding incline disposed on the inner face of the liner (2) and the outer face of this end region (13) engages in the groove (10) associated with the valve (20).
  5. Composite pressurised container according to one of claims 1 to 4, characterised in that in the neck piece (4) provided to receive a valve (20) the cylindrical region (23) of the neck piece (4) extends into the container (1) and the liner (2) fully encloses this inward-projecting region (23).
  6. Composite pressurised container according to on eof claims 1 to 5, characterised in that the liner (2) is closed on the side opposite the valve (20).
  7. Composite pressurised container according to one of claims 1-6, characterised in that the transition region (30) of the liner (2) from the cylindrical casing (11) is iso-tensoid and the continuously curved outline corresponds roughly to a polygonal line consisting of many individual sections.
  8. Composite pressurised container according to one of claims 1-7, characterised in that between the outer face of the frustoconical section (17) of the clamp ring (15) and the inner face of the end region (13) of the liner having an incline, a sealing means is provided.
  9. Composite pressurised container according to claim 8, characterised in that the region subject to a sealing means extends into the transition of the frustoconical section (17) to the male-threaded section (16) of the clamp ring (15).
EP97250216A 1996-07-24 1997-07-21 Composite pressure vessel with a plastic liner for the storage of pressurized gaseous fluids Expired - Lifetime EP0821194B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19631546A DE19631546C1 (en) 1996-07-24 1996-07-24 Composite gas pressure-bottle with plastic liner
DE19631546 1996-07-24

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EP0821194A2 EP0821194A2 (en) 1998-01-28
EP0821194A3 EP0821194A3 (en) 1998-11-04
EP0821194B1 true EP0821194B1 (en) 2003-12-03

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AT (1) ATE255706T1 (en)
DE (1) DE19631546C1 (en)
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CN102865455A (en) * 2012-09-14 2013-01-09 湖北三江航天江北机械工程有限公司 High-temperature and high-pressure insulated composite air cylinder and manufacture method of high-temperature and high-pressure insulated composite air cylinder
DE102011052490A1 (en) 2011-08-08 2013-02-14 Rehau Ag + Co. Apparatus for storing and dispensing liquid and / or gaseous media under pressure, and to a fuel energy conversion apparatus and method for assembling a device for storing and dispensing liquid and / or gaseous media under pressure
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EP2131095A2 (en) 2008-04-25 2009-12-09 Adam Saferna Fluid extinguisher
CN101832389A (en) * 2010-06-02 2010-09-15 刘强 Fiber reinforced composite pressure bottle
CN101832389B (en) * 2010-06-02 2012-10-10 刘强 Fiber reinforced composite pressure bottle
DE102011052490A1 (en) 2011-08-08 2013-02-14 Rehau Ag + Co. Apparatus for storing and dispensing liquid and / or gaseous media under pressure, and to a fuel energy conversion apparatus and method for assembling a device for storing and dispensing liquid and / or gaseous media under pressure
WO2013020668A1 (en) 2011-08-08 2013-02-14 Rehau Ag + Co Device for storing and dispensing pressurized fluid and/or gaseous media, fuel energy conversion device, and method for assembling a device for storing and dispensing pressurized fluid and/or gaseous media
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CN102865455A (en) * 2012-09-14 2013-01-09 湖北三江航天江北机械工程有限公司 High-temperature and high-pressure insulated composite air cylinder and manufacture method of high-temperature and high-pressure insulated composite air cylinder
CN102865455B (en) * 2012-09-14 2014-07-23 湖北三江航天江北机械工程有限公司 High-temperature and high-pressure insulated composite air cylinder and manufacture method of high-temperature and high-pressure insulated composite air cylinder

Also Published As

Publication number Publication date
ATE255706T1 (en) 2003-12-15
DK0821194T3 (en) 2004-03-08
ES2208820T3 (en) 2004-06-16
DE19631546C1 (en) 1997-11-13
EP0821194A3 (en) 1998-11-04
EP0821194A2 (en) 1998-01-28

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