Pressure container for storing fluid media

Abstract

The invention relates to a pressure container (1) for storing fluid media, in particular hydrogen, having an insert (2) with a fluid-tight storage chamber (4), in particular a storage chamber which is secured against permeation, for storing the fluid medium, a support sleeve (6) which receives the insert (2) in a receiving chamber (8) in order to support the insert, and a connection element (14). The support sleeve (6) has a supply bore (10) which opens into the receiving chamber (8), the insert (2) has a storage opening (12) which is arranged coaxially to the supply bore (10) of the support sleeve (6) and which opens into the storage chamber (4), and the connection element (14) has a connection bore (16) which runs coaxially to the supply bore (10) and the storage opening (12) and which has a connection geometry (18) for connecting to a connection fitting. An annular neck section (20) of the connection element (14) rests radially against the supply bore (10) in a circumferential manner and a flange section (22) thereof which adjoins the neck section (20) is arranged so as to protrude into the receiving chamber (8) of the support sleeve (6) such that the flange section (22) rests against the inner wall of the support sleeve (6) in an edge region of the supply bore (10), and the edge region of the storage opening (12) of the insert (2) is connected to the flange section (22) in a fluid-tight manner. The connection geometry (18) is arranged in the flange section (22) of the connection element (14).

Description

[0001] “Pressure vessels for storing fluid media”

[0002] The invention relates to a pressure vessel for storing fluid media, in particular hydrogen. The pressure vessel has an insert with a fluid-tight storage space. The storage space serves to store the fluid medium. Furthermore, the pressure vessel has a support sleeve that supports the insert in a receiving space, and a connection element. The support sleeve has a supply bore that opens into the receiving space. The insert has a storage opening arranged coaxially to the supply bore of the support sleeve and opens into the storage space. The connection element has a connection bore that runs coaxially to the supply bore and has a connection geometry for connection to a connection fitting.Furthermore, the connecting element has an annular neck portion that radially abuts the supply bore along its circumference and is arranged with a flange portion adjacent to the neck portion projecting into the receiving space of the support sleeve in such a way that the flange portion abuts an inner wall of the support sleeve in an edge region of the supply bore. The insert is fluid-tightly connected to the flange portion at an edge region of the reservoir opening.

[0003] WO 2008 / 107049 A1 discloses a pressure vessel in which the connection element for receiving a connection fitting is designed as a cylindrical metal body. This comprises an edge region of the support shell such that a flange portion of the metal body is arranged within a receiving space of the support shell. Furthermore, it is provided that a plastic core container for storing the fluid, with a collar forming a storage opening, sealingly abuts an inner wall of a connection bore of the metal body, so that a connection fitting that can be screwed to the metal body can be arranged sealingly against the collar of the plastic core container.For this purpose, the collar of the plastic core container protrudes into the connection bore in the area of ​​the flange section of the metal body, whereas the metal body above the flange section has a connection geometry in an annular neck section for screwing in the connection fitting. The neck section rests radially circumferentially against a supply bore of the support sleeve that is open to the receiving space.

[0004] A connection fitting in the sense of the invention can expediently be designed as a valve through which the fluid can be guided into and / or out of the pressure vessel, in particular into the insert.

[0005] For hydrogen-based propulsion concepts to be successful on the market, economical pressure storage systems for providing the gaseous fuel are necessary. Known pressure vessels, particularly fiber-wound pressure vessels (Type IV), have a solid metal connecting element for screwing to the connection fitting. This is primarily due to the fact that the screwing of the connection fitting to the connecting element, as is known from the prior art, takes place in the neck section of the connecting element, for which purpose a connection geometry in the form of an internal thread is usually formed in the connection bore in the neck section of the connecting element. This design therefore requires that the neck of the connecting element be very solid so that high mechanical forces during assembly and tear-out forces due to very high pressures do not lead to damage to the connecting element and / or the connection fitting.Furthermore, a very strong, particularly monolithic, one-piece connection between the neck section and the flange section is required to prevent tearing. The connection elements known from the prior art are therefore monolithic in design and are heavy and expensive to produce.

[0006] In addition, the solid neck section required for the connection geometry has a very large outer diameter, which adversely affects the force-absorbing capacity of the support sleeve, since the supply bore for accommodating the connection element is also correspondingly larger. To maintain the force-absorbing capacity at the required level, it is known from the prior art to make the support sleeve more solid, at least in the area of ​​the supply bore, and / or to at least partially increase the fiber content of a support sleeve made of fiber-reinforced plastic.

[0007] The shortcomings of the pressure vessels known from the state of the art are therefore particularly high material costs and a high overall weight due to the non-fiber-compatible winding of the support sleeve and the massive connection element. Furthermore, inefficient use of space has been found in pressure vessels of this type due to tall connection fittings that protrude from the connection bore. In the known pressure vessels, the connection fittings are screwed into the neck section of the connection element, so that they protrude from the connection bore and are prone to failure. In addition, the high axial and shear forces that arise in the neck section of the connection element during assembly place considerable strain on the material and fibers of the support sleeve due to the correspondingly large functional surfaces resulting from the large thread diameters.

[0008] The invention is based on the object of providing a pressure vessel which overcomes the disadvantages known from the prior art, in particular having a lower weight and a higher material and / or production cost efficiency.

[0009] The object is achieved according to the invention by the features of claim 1. Because the connection geometry is arranged in the flange section of the connection element, the force flow in the connection element is modified such that the force is introduced from the connection fitting into the connection element in the flange section of the connection element. The neck section of the connection element is therefore relieved, so that only low mechanical load requirements are placed on the neck section. As a result, the neck section of the connection element can have a thinner wall and a significantly reduced outer diameter.In addition to the material savings of the connecting element in the neck section, the reduced outer diameter also enables a more fiber-oriented winding of the support sleeve, so that material can also be saved in the support sleeve and the support sleeve is subjected to less stress, particularly in the area of ​​the supply bore. In order to optimally utilize the lightweight construction potential of the pressure vessel, a geometry of the connecting element, in particular of the neck section, is expediently used which allows for fiber-oriented load distribution. "Fiber-oriented" means that each fiber experiences constant stress at every point. In particular, the stress state or stress distribution is isotensoid. The connecting element therefore enables an isotensoid stress distribution across the entire curvature of the connecting element, particularly in the neck section.

[0010] The design according to the invention enables a reduction in weight and production costs. Particularly when the pressure vessel is used as a hydrogen tank for a motor vehicle, the increased gravimetric density of the fuel storage device increases the vehicle's range, and the cost reduction contributes to the faster adoption of hydrogen-based technologies across all industries.

[0011] The connection geometry is expediently designed as an internal thread to accommodate a connection fitting corresponding to an external thread. Advantageously, the connection geometry, in particular the internal thread, is designed such that known and standardized connection fittings, such as valves, can be screwed to the pressure vessel.

[0012] By reducing the load on the connecting element in the neck section, the inventive design enables a special embodiment in which the neck section of the connecting element and the flange section of the connecting element are formed as two separately manufactured components that are connected to form the connecting element. In particular, the modular design allows the connecting element to be quickly adapted to specific specifications. Furthermore, the material properties of the connecting element in the neck section and in the flange section can be adapted through separate treatment or machining processes, thus increasing overall efficiency.

[0013] In a further developed variant, the neck section of the connecting element consists of a first material, and the flange section of the connecting element consists of a second material. It is advantageous for the first material of the neck section and the second material of the flange section to differ in their type and / or material composition. In particular, the neck section can be made of a less resilient, yet lighter material than the flange section.

[0014] An advantageous material combination provides that the first material of the connecting element, from which the neck section is made, is a plastic, and the second material of the connecting element, from which the flange section is made, is a metal, in particular steel. It is particularly advantageous to construct the neck section from a plastic in order to reduce the weight of the connecting element or the pressure vessel, whereby this embodiment is made possible by the inventive relocation of the connection geometry into the flange section.

[0015] Other expedient adaptations made possible by the modular design of the connecting element, in particular the separation of the neck section from the flange section, can include local optimization with regard to resistance to aggressive fluids, corrosion protection, impact and fracture resistance, and many other areas. The connecting element is expediently designed as an assembly in which the flange section and the neck section are connected to one another in a materially bonded manner, in particular by adhesive bonding, and / or by positive and / or non-positive connection. Additionally or alternatively, a special design can also provide for the flange section and the neck section to be connected to one another by means of pins arranged axially relative to the connection bore.

[0016] In a particular embodiment of the invention, the connecting element is designed such that it extends with the flange section between the edge region of the supply bore of the support sleeve and an edge region of the storage opening of the insert. The flange section of the connecting element expediently rests against the inner wall of the support sleeve and an outer surface of the insert. In particular, the insert is thereby arranged in a fluid-tight manner directly against the connecting element. The overlap between the flange section of the connecting element and the outer surface of the insert is expediently dimensioned so large that a fluid stored under operating pressure in the pressure vessel, in particular the insert, cannot escape from the storage space through the contact region of the insert relative to the connecting element.

[0017] In order to avoid leakage, it has proven particularly advantageous that the insert is injection-molded or vulcanized onto the flange section of the connecting element according to an advantageous embodiment.

[0018] It has also proven advantageous if, in an optional variant of the invention, the support sleeve is made of a fiber-reinforced plastic. In particular, this allows the support sleeve to exhibit a high degree of deformation resistance.

[0019] The connecting element is expediently connected to the support sleeve in an at least positively locking manner. It has proven particularly advantageous for the support sleeve to be connected to the holding section of the connecting element in an at least positively locking manner, preferably at least in the region of the supply bore. A further developed embodiment of the invention therefore consists in an outer circumferential surface of the connecting element in the neck section having at least one radially pronounced holding contour, which is connected to the support sleeve in an at least positively locking manner.

[0020] In particular, it can be provided that the retaining contour is integrated into the material of the support sleeve directly during the manufacturing process of the support sleeve. The retaining contour is expediently overmolded or wrapped with a plastic, in particular a fiber-reinforced plastic. The design of the retaining contour advantageously allows the freedom of movement, axial and / or rotational, of the connecting element relative to the support sleeve to be adjusted. Particularly advantageously, the neck section of the connecting element can be made of a material such that the retaining contour can be easily manufactured in the forming process and / or a post-processing process.

[0021] In order to limit axial displacement of the connecting element in the supply bore, the retaining contour can expediently be designed as at least one bead protruding radially outward from the circumferential surface. In addition to this, or as an alternative to the bead, it can also be provided that the retaining contour is designed as at least one groove embossed radially inward into the circumferential surface. It is advantageous if the groove and / or the bead is designed to run annularly around the entire circumference of the neck section, so that the positive fixing of the connecting element in the supply bore is ensured only in the axial direction to the supply bore and, theoretically, rotation of the connecting element in the supply bore is still possible.

[0022] In order to limit axial displacement and theoretical rotation of the connecting element in the supply bore, it can be provided that the holding contour is designed as at least two notches distributed circumferentially around the neck section, embossed radially inward into the circumferential surface and / or bulges protruding outward from the circumferential surface. It can also be expedient if only one notch or bulge is formed on the circumferential surface, wherein the one notch or bulge has at least one interruption in its circumferential extension around the neck section, which interruption is filled with the material of the support sleeve in such a way that theoretical rotation of the connecting element in the supply bore is blocked by a positive blockade at the point of interruption of the notch or bulge.

[0023] Another useful variant of the retaining contour to limit axial displacement of the connecting element in the supply bore can be formed by a circumferentially radially outward-facing, concave structure on the circumferential surface. In this case, the retaining contour is provided by the circumferential surface itself, which has a particularly positive effect on manufacturing costs.

[0024] In particular, in a particular variant of the invention, the neck portion has a lip which is designed such that it projects into the edge region of the flange portion facing the support sleeve in such a way that an at least partial separation of the support sleeve from the edge region of the flange portion is achieved.

[0025] Further advantageous embodiments of the invention emerge from the following description of the figures and the dependent subclaims.

[0026] They show:

[0027] Fig. 1 is a sectional view of a portion of a pressure vessel,

[0028] Fig. 2 is a side view of a first variant of a neck section of a modular connection element, Fig. 3 is a side view of a flange section of a modular

[0029] connecting element,

[0030] Fig. 4 a sectional view through the neck section and the

[0031] Flange section of a variant of a modular connection element and

[0032] Fig. 5 to 9 side views of further variants of neck sections of a modular connecting element, each with different holding contours.

[0033] In the various figures of the drawing, identical parts are always provided with the same reference symbols.

[0034] With regard to the following description, it is claimed that the invention is not limited to the exemplary embodiments and not to all or several features of described combinations of features, but rather each individual partial feature of the / each exemplary embodiment is also important for the subject matter of the invention, even independently of all other partial features described in connection therewith, and also in combination with any features of another exemplary embodiment.

[0035] Fig. 1 shows a pressure vessel 1 for storing fluid media. In particular, the pressure vessel 1 is suitable for storing hydrogen. As shown, the pressure vessel 1 has an insert 2 with a fluid-tight storage space 4 for storing the fluid medium, e.g., hydrogen. It has proven particularly advantageous for the insert 2 to be permeable to the medium to be stored.

[0036] As shown by way of example in Fig. 1, the pressure vessel 1 has a support shell 6, in particular a fiber-reinforced one. The insert 2 is accommodated in a receiving space 8 of the support shell 6 such that, at least under pressure, e.g., as a result of the storage of the fluid, the support shell 6 acts in a supporting manner on the insert 2 and limits any expansion of the insert 2.

[0037] The insert 2 is therefore preferably fluid-impermeable and flexible, wherein the insert 2 is made in particular from a non-metallic material, advantageously an elastomer or another material with elastic properties.

[0038] In particular, due to its advantageous elastic properties, the insert 2 rests flat against an inner side of the support sleeve 6 in such a way that the support sleeve 6 is fluid-tightly protected from the fluid stored in the insert 2. For this purpose, the insert 2 is expediently made of a polymer, in particular a plastic. The insert 2 is advantageously formed by means of a compression molding, blow molding, or injection molding process.

[0039] Furthermore, Fig. 1 shows that the support sleeve 6 has a supply bore 10, which opens into the receiving space 8. The insert 2 has a storage opening 12, which is arranged or formed coaxially with the supply bore 10 of the support sleeve 6 and opens into the storage space 4.

[0040] Furthermore, the pressure vessel 1 has a connection element 14, which is illustrated by way of example in particular in Figs. 1 and 4. The connection element 14 has a connection bore 16 extending coaxially with the supply bore 10 and having a connection geometry 18 for connection to a connection fitting. The connectable connection fitting is not shown. The connection fitting is expediently a valve or a connection line.

[0041] The connection geometry 18 is advantageously designed as an internal thread 18 for screwing with a corresponding external thread formed on the connection fitting. The connection element 14 has an annular neck portion 20, with which it is arranged circumferentially radially adjacent to the supply bore 10, as shown in Fig. 1. Furthermore, the connection element 14 is arranged with a flange portion 22 adjacent to the neck portion 20, projecting into the receiving space 8 of the support sleeve 6 in such a way that the flange portion 22 bears against an inner wall of the support sleeve 6 in an edge region of the supply bore 10.

[0042] The connecting element 14 and the insert 2 are configured and arranged relative to one another in such a way that the insert 2 is fluid-tightly connected to the flange portion 22 by an edge region of the storage opening 12. As a result, a fluid can be introduced and stored through the connection bore 16, or through the connection fitting arranged in the connection bore 16, through the coaxially arranged storage opening 12 into the storage space 4 of the insert 2.

[0043] According to the invention, the connection geometry 18, in particular an internal thread 18 formed in the connection bore 16, is arranged in the flange section 22 of the connection element 14. In particular, the connection element 14 has a larger outer diameter in the flange section 22 than in the neck section 20, so that the connection element 14 can be supported with the flange section 22 on the support sleeve 6. This enlarged outer diameter results in a higher load-bearing capacity due to the design for bearing in the flange section 22. The embodiment according to the invention takes advantage of this structural design of the connection element 14 in that the flange section 22, which has an enlarged outer diameter due to the bearing required, is simultaneously used to hold the connection fitting.The resulting synergy effect makes it possible to relieve the load on the connecting element 14 in the neck section 20, thus avoiding material fatigue in the neck section 20. In particular, FIGS. 1 and 4 show a special embodiment of the connecting element 14, according to which the neck section 20 of the connecting element 14 and the flange section 22 of the connecting element 14 are designed as two separately manufactured components which are connected to form the connecting element 14. To clarify the modular design of the connecting element 14, a dividing line 24 is shown in FIGS. 1 and 4, which separates the first component designed as the neck section 20 and the second component designed as the flange section 22.

[0044] An advantageous variant of the invention provides that the neck portion 20 of the connecting element 14, shown in Figures 2 and 5 to 9, consists of a first material, and the flange portion 22 of the connecting element 14, shown in Figure 3, consists of a second material. In particular, it can be provided that the first material of the neck portion 20 and the second material of the flange portion 22 differ in their type and / or material composition. The connecting element 14 can thus be adjusted as needed to meet the material requirements. In particular, the load-bearing capacity and the weight can be adjusted as a result.

[0045] An advantageous material combination for the connecting element 14 provides that the first material of the connecting element 14, from which the neck portion 20 is made, is a plastic, and the second material of the connecting element 14, from which the flange portion 22 is made, is a metal, in particular a steel. Preferably, the neck portion 20 is formed from a plastic that is at least injection-moldable. Advantageously, the neck portion 20 is formed from a plastic that is at least machinable. Advantageously, the neck portion 20 is formed from a plastic that is at least printable.

[0046] In particular, in the preferably modular connecting element 14, the flange portion 22 and the neck portion 20 are connected to one another in a materially bonded and / or positively locking and / or non-positively locking manner. In particular, a suitable materially bonded connection may consist in the flange portion 22 being glued or welded to the neck portion 20. Particularly in the case of a flange portion 22 formed from a plastic material, the flange portion 22 may advantageously be welded to the neck portion 20.

[0047] An advantageous positive and / or non-positive connection can consist in the neck section 20 and / or flange section 22 having a retaining contour and / or a locking contour, for example, locking arms on the neck section 20 and / or the flange section 22, which engage in correspondingly formed grooves on the respective neck section 20 and / or flange section 22 to be connected. The neck section 20 can also be connected to the flange section 22 via a screw thread or a bayonet lock. Another advantageous embodiment consists in the neck section 20 being pressed onto the flange section 22.

[0048] A further preferred positive and / or non-positive connection between the neck section 20 and the flange section 22 can consist in the flange section 22 and the neck section 20 being supported by means of at least one connecting element 26. Such an advantageous connection is shown in particular in Fig. 4, wherein at least one pin 26 arranged axially to the connection bore 16 is formed as the connecting element 26, which pin 26 connects the neck section 20 and the flange section 22 to one another. The pin 26 engages in a bore 28 in the flange section 22 and a bore 28 in the neck section 20, at least in a positive fit, and in particular also in a non-positive fit. In the embodiment shown in Fig.4, four connecting elements 26 designed as pins 26 are advantageously used, which are distributed in particular evenly, in particular at an angle of 90° each, around the circumference of the connection bore 16, wherein only two pins 26 are visible in the sectional view according to Fig. 4. Fig. 1 shows a particularly advantageous embodiment of the invention, wherein in particular the tightness is optimized in that the connection element 14 with the flange section 22 extends between the edge region of the supply bore 10 of the support sleeve 6 and an edge region of the storage opening 12 of the insert 2. It is expediently provided that this design is carried out in such a way that the flange section 22 of the connection element 14 rests against the inner wall of the support sleeve 6 and an outer surface of the insert 2.In particular, this seals the insert 2 directly against the connecting element 14, thus relieving the support sleeve 6 of its sealing function. In particular, this also protects the support sleeve 6 from the fluid media to be stored, so that the support sleeve 6 itself does not need to be resistant to any potential aggressiveness of the fluid media.

[0049] The tightness and fault resistance are improved by a variant in that the insert 2 is injection-molded or vulcanized onto the flange section 22 of the connecting element 14.

[0050] In particular, the support sheath 6 is made of laminated layers of wound glass fiber threads or various types of other synthetic fibers bonded together by a thermosetting or thermoplastic resin.

[0051] The support sleeve 6 is expediently formed from a composite material made of a predominantly rigid material with high mechanical strength. The composite material is preferably a fiber-reinforced composite material, in particular based on resin or plastic. In particular, the support sleeve is manufactured in a winding process. Therefore, the support sleeve 6 is expediently made of a fiber-reinforced plastic.

[0052] Preferably, but not exclusively, glass, carbon, or aramid fibers are used as reinforcing fibers. In particular, but not exclusively, the materials epoxy, polyester, vinyl ester, or thermoplastics serve as the resin or plastic base. The type of fiber and the resin or plastic base can be selected depending on the application, so that the pressure vessel 1 can be adapted to the application. Because the connection geometry 18 is arranged in the connection bore 16 of the connection element 14 in the flange section 22, and because the outer diameter in the neck section 20 and, consequently, the inner diameter of the supply bore 10 of the support sleeve 6 can be made small, the number of possible materials for the support sleeve 6 is expanded, so that even atypical materials for the support sleeve 6, or the fiber type and / or the resin or plastic base can be used.

[0053] For arranging the connecting element 14 in the supply bore 10 of the support sleeve 6, a particularly advantageous embodiment provides that an outer circumferential surface 30 of the connecting element 14 in the neck section 20 has at least one radially pronounced retaining contour 32, 34, 36, 38, 40, which is at least positively connected to the support sleeve 6. Different designs of neck sections 20 with retaining contours 32, 34, 36, 38, 40 are shown in particular in Figs. 5 to 9.

[0054] Preferred variants of the retaining contours 32, 34 are shown in Figs. 5 and 6. In particular, the retaining contour 32 is designed as at least one bead 32 projecting radially outward from the circumferential surface 30. This embodiment is shown, for example, in Fig. 5. As shown in Fig. 6, the retaining contour 34 is expediently designed, alternatively or additionally, at least as a groove 34 embossed radially inward into the circumferential surface 30. Advantageously, the groove 34 and / or the bead 32 are / is designed to extend in a ring shape around the entire circumference of the neck portion 20. Accordingly, in both Fig. 5 and Fig. 6, the retaining contour 32, 34 advantageously extends in a ring shape around the neck portion 20.

[0055] Further preferred embodiments of the retaining contours 36, 38 are shown in Figs. 7 and 8. According to one embodiment, the retaining contour 36 is designed as at least two notches 36 circumferentially distributed around the neck portion 20 and embossed radially inward into the circumferential surface 30. The embodiment of the retaining contour 36 as radial notches 36 is shown in Fig. 7. Alternatively or additionally, an optional variant provides that the retaining contour 38, as shown in Fig. 8, is designed as at least two bulges 38 circumferentially projecting outward from the circumferential surface 30. The embodiments according to Figs. 7 and 8 also show particularly advantageous variants in which the holding contour 36, 38 is formed from four notches 36 or bulges 38 each distributed over the circumference of the circumferential surface 30, in particular at 90° to the connection bore 16. The notches 36 orBulges 38 can advantageously divert forces in the axial and tangential directions into the support shell 6.

[0056] According to a further preferred embodiment of the retaining contour 40, the retaining contour 40 is formed by a circumferentially concave structure of the peripheral surface 30 of the neck portion 20 that extends radially outward. This variant of the neck portion 20 is shown as an example in Fig. 9. Further advantageous, not shown, embodiments of the retaining contour can consist, but are not limited to, in the circumferential surface 30 of the neck portion 20 being convex or wavy or wave-shaped, extending radially outward.

[0057] In particular, the variants of the holding contour 32, 34, 40 shown in Figs. 5, 6, and 9 are designed such that, expediently, predominantly only axial forces are transmitted from the neck portion 20 to the support sleeve 6. Advantageously, the concave geometry of the holding contour 40, as shown in Fig. 9, enables undisturbed fiber deposition, in particular a particularly fiber-oriented winding, in an advantageous winding process for producing the support sleeve 6.

[0058] Preferably, the neck portion 20 is formed as an injection-molded component. Injection-molding the neck portion 20 makes it particularly cost-effective to round the corners and surface transitions, so that during a winding process for producing the support sleeve 6, the fibers are laid around the neck portion 20 in uniform radii. Furthermore, damage from sharp edges is prevented by the rounded edges.

[0059] The invention is not limited to the illustrated and described embodiments, but also encompasses all equivalent embodiments within the meaning of the invention. It is expressly emphasized that the embodiments are not limited to all features in combination; rather, each individual partial feature can also have an inventive significance in itself, independently of all other partial features. Furthermore, the invention is not yet limited to the combination of features defined in claim 1, but can also be defined by any other combination of specific features of all the individual features disclosed as a whole. This means that, in principle, practically every individual feature of claim 1 can be omitted or replaced by at least one individual feature disclosed elsewhere in the application.

[0060] List of reference symbols

[0061] 1 pressure vessel

[0062] 2 inserts

[0063] 4 storage space

[0064] 6 Support cover

[0065] 8 Recording room

[0066] 10 supply boreholes

[0067] 12 Storage opening

[0068] 14 connecting element

[0069] 16 connection hole

[0070] 18 Connection geometry - internal thread

[0071] 20 neck section

[0072] 22 Flange section

[0073] 24 dividing line

[0074] 26 Connecting element - pin

[0075] 28 Hole

[0076] 30 circumferential area

[0077] 32 Holding contour - bead

[0078] 34 Holding contour - groove

[0079] 36 Holding contour - notch

[0080] 38 Holding contour - bulging

[0081] 40 Holding contour - concave circumferential surface

Claims

Claims 1. A pressure vessel (1) for storing fluid media, in particular hydrogen, comprising an insert (2) with a fluid-tight, in particular permeation-resistant, storage space (4) for storing the fluid medium, a support sleeve (6) supporting the insert (2) in a receiving space (8), and a connecting element (14), wherein the support sleeve (6) has a supply bore (10) which opens into the receiving space (8), wherein the insert (2) has a storage opening (12) arranged coaxially to the supply bore (10) of the support sleeve (6), which opens into the storage space (4), wherein the connecting element (14) has a connection bore (16) running coaxially to the supply bore (10) and storage opening (12) and having a connection geometry (18) for connection to a connection fitting,wherein the connecting element (14) is arranged with an annular neck portion (20) circumferentially radially abutting the supply bore (10) and with a flange portion (22) adjacent to the neck portion (20) projecting into the receiving space (8) of the support sleeve (6) in such a way that the flange portion (22) abuts an inner wall of the support sleeve (6) in an edge region of the supply bore (10) and the insert (2) is connected to the flange portion (22) in a fluid-tight manner to an edge region of the storage opening (12), characterized in that the connecting geometry (18) is arranged in the flange portion (22) of the connecting element (14).

2. Pressure vessel (1) according to claim 1, characterized in that the connection geometry (18) is designed as an internal thread (18) for receiving a connection fitting designed correspondingly with an external thread.

3. Pressure vessel (1) according to claim 1 or 2, characterized in that the neck portion (20) of the connecting element (14) and the flange portion (22) of the connecting element (14) are designed as two separately manufactured components which are connected to the connecting element (14).

4. Pressure vessel (1) according to claim 3, characterized in that the neck portion (20) of the connecting element (14) consists of a first material and the flange portion (22) of the connecting element (14) consists of a second material, wherein the first material of the neck portion and the second material of the flange portion differ in their type and / or material composition.

5. Pressure vessel (1) according to claim 4, characterized in that the first material of the The connecting element (14) from which the neck section (20) consists is a plastic and the second material of the connecting element (14) from which the flange section (22) consists is a metal, in particular a steel.

6. Pressure vessel (1) according to one of claims 3 to 5, characterized in that the flange section (22) and the neck section (20) are connected to one another in a materially bonded manner, in particular by adhesive bonding, and / or in a form-fitting manner and / or in a force-fitting manner, in particular by pressing.

7. Pressure vessel (1) according to one of claims 3 to 6, characterized in that the flange section (22) and the neck section (20) are connected to one another by means of pins arranged axially to the connection bore (16).

8. Pressure vessel (1) according to one of the preceding claims, characterized in that the connecting element (14) with the flange section (22) extends between the edge region of the supply bore (10) of the support sleeve (6) and an edge region of the storage opening (12) of the insert (2) such that the flange section (22) of the connecting element (14) rests against the inner wall of the support sleeve (6) and an outer surface of the insert (2).

9. Pressure vessel (1) according to one of the preceding claims, characterized in that the insert (2) is injection-molded or vulcanized onto the flange portion (22) of the connecting element (14).

10. Pressure vessel (1) according to one of the preceding claims, characterized in that the support shell (6) consists of a fiber-reinforced plastic.

11. Pressure vessel (1) according to one of the preceding claims, characterized in that an outer circumferential surface (30) of the connecting element (14) in the neck section (20) has at least one radially pronounced holding contour (32, 34, 36, 38, 40) which is connected at least positively to the support sleeve (6).

12. Pressure vessel (1) according to claim 11, characterized in that the holding contour (32, 34) is designed as at least one bead (32) projecting radially outward from the circumferential surface (30) and / or at least as a groove (34) embossed radially inward into the circumferential surface (30), wherein the groove (34) and / or the bead (32) is formed in a ring-shaped manner all the way around the neck section (20).

13. Pressure vessel (1) according to claim 11 or 12, characterized in that the holding contour (36, 38) is designed as at least two notches (36) distributed circumferentially around the neck portion (20) and embossed radially inwardly into the circumferential surface (30) and / or as bulges (38) projecting outwardly from the circumferential surface (30).

14. Pressure vessel (1) according to one of claims 11 to 13, characterized in that the holding contour (40) is formed by a circumferentially radially outwardly pointing concave structure of the circumferential surface (30).

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