Valve assembly, pressure vessel system, motor vehicle and production method for pressure vessel system

Abstract

According to the invention, the technology disclosed herein relates to a valve assembly (10) for mounting on a pressure vessel (14), comprising a valve body (20) with a first fuel line (22) and a connecting member (40) with a first section (41), at which the valve body (20) is fixed in a non-destructively disengageable manner, and a second section (42), at which the valve body (20) is fixed in a non-destructively disengageable manner, the second section is designed to project at least partially into the pressure vessel (14) in a state in which the valve assembly (10) is mounted on the pressure vessel (14), a second fuel line (44) formed in the connecting member (40) extends through the first section (41) and the second section and is arranged for fluid-conducting connection of an inner region of the pressure vessel (14) to the first fuel line (22) in a state in which the valve assembly (10) is mounted on the pressure vessel (14). Furthermore, according to the present invention, the technology disclosed herein relates to a pressure vessel system for a motor vehicle, a motor vehicle and a manufacturing method for a pressure vessel system.

Description

Technical Field

[0001] The technology disclosed herein relates to a valve assembly for installation at a pressure vessel, a pressure vessel system having such a valve assembly, a motor vehicle having a pressure vessel system, and a manufacturing method for the pressure vessel system. Background Art

[0002] Pressure vessel systems for storing fuel in vehicles, in particular ground vehicles, water vehicles or air vehicles, are known per se. It is also known that the pressure vessels of such pressure vessel systems are provided with so-called valves-in-tank (OTVs), which are screwed into openings of the pressure vessels in each case. Such valves-in-tank can have a shut-off valve which enables the respective pressure vessel to be closed in such a way that fuel cannot escape from the interior of the pressure vessel through the opening. In contrast, if the shut-off valve is open, fuel can flow through the valves-in-tank and the withdrawal line in the direction of the drive assembly of the motor vehicle. Summary of the invention

[0003] A preferred task of the technology disclosed herein is to reduce or eliminate at least one disadvantage of a previously known solution, or to propose an alternative solution. In particular, a preferred task of the technology disclosed herein is to provide a valve assembly with efficient construction space, which can be relatively easily installed at the pressure vessel and can achieve efficient maintenance. In addition, a preferred task of the technology disclosed herein is to provide a corresponding pressure vessel system, a corresponding motor vehicle and a corresponding manufacturing method for a pressure vessel system. Other preferred tasks can be obtained from the advantageous effects of the technology disclosed herein.

[0004] The object or objects are achieved by the subject matter of claim 1 and the other independent claims. The dependent claims form preferred embodiments.

[0005] According to one aspect, a valve assembly is proposed, which is arranged to be installed at a pressure vessel, in particular at a motor vehicle pressure vessel for fuel. The valve assembly comprises a valve body with a first fuel line and a connecting member with a first section and a second section. The valve body is fixed to the first section in a non-destructively detachable manner. The second section is designed to extend at least partially into the pressure vessel when the valve assembly is installed at the pressure vessel. The second fuel line constructed in the connecting member extends through the first section and the second section and is arranged to connect the internal area of ​​the pressure vessel to the first fuel line in a fluid-conducting manner when the valve assembly is installed at the pressure vessel. A shut-off valve can be provided at the first fuel line, which can preferably close the first fuel line.

[0006] Thus, the valve assembly can be manufactured relatively quickly and cost-effectively and can be installed at the pressure vessel. Due to the multi-piece design of the valve assembly, the connecting member (which actually acts as an adapter between the valve body and the pressure vessel) can first be installed at the pressure vessel, in particular screwed into the pressure vessel. Then in the next installation step, the valve body can be fixed to the connecting member. According to the current technology, this fixing is reversible, so that if necessary, for example when maintaining the valve assembly or a pressure vessel system with the valve assembly, which will be explained in more detail below, the connecting member can continue to be installed at the pressure vessel and only the valve body can be removed, replaced and / or repaired. Maintenance costs and material consumption can be reduced in this way.

[0007] In a coordinated manner, the valve assembly also offers the possibility of subjecting the pressure vessel with the connecting component mounted on the pressure vessel and without the valve body to a safety check, which can be carried out without problems, for example, in a valve assembly without two components that can be separated non-destructively. As a result, the valve assembly can be checked more closely. In addition, for example, in the event of a fault at the valve body, in particular at the stop valve, only the valve body (if possible together with the stop valve) can be replaced without removing the connecting component from the pressure vessel.

[0008] In the context of the present disclosure, the term "pipeline" (e.g. under the term "fuel line") denotes a pipeline device for conveying a fluid according to its general definition in the current technical field. For example, the first / second fuel line can contain at least one (pipeline) channel, at least one pipeline line and / or at least one hose or be configured as such a (pipeline) channel, pipeline line and / or hose. Preferably, the first fuel line is (only) constructed in the valve body and the second fuel line is (only) constructed in the connecting member. In general, the first / second fuel line can currently configure a first or second fuel flow path, which can be configured by the at least one pipeline line or the at least one channel. The channel can be arranged in the valve body or in the base of the connecting member, wherein the valve body / base can be configured as a valve block respectively.

[0009] Preferably, the valve body is connected to the connecting member via a flange, i.e., is connected to the connecting member by means of a flange. For this purpose, at least one flange can be respectively configured at the connecting member and / or at the valve body, and the flanges are respectively fixed to another element (i.e., at the valve body or at the connecting member). In particular, a first flange can be configured at the valve body. Alternatively or additionally to this, a second flange can be configured at the connecting member. The first flange and the second flange can be arranged separately from each other and / or can be arranged at the ends of the connecting member that are opposite to each other. The transition between the first fuel line and the second fuel line can be located in the center between the two ends to improve the seal.

[0010] In order to be able to remove the valve body from the connecting member non-destructively, the connection structure between the valve body and the connecting member can preferably not be designed as a material lock, but can instead be designed as a force lock and / or a form lock. Preferably, the valve body is screwed to the connecting member, in particular by means of the first and / or second flange. A first connecting device with a first thread can pass through the first flange and be in engagement with the connecting member. In addition, a second connecting device with a second thread can pass through the second flange and be in engagement with the valve body. The first flange and the second flange can extend parallel to each other and in opposite directions away from a central part of a base body of the connecting member, through which the second fuel line extends.

[0011] The valve body and the connecting member are preferably designed so that the valve body and the connecting member together form a one-piece body when they are fixed to each other, wherein the main surfaces of the valve body and the connecting member extend flush with each other. Thus, the connecting member can have a first surface on its side opposite the second section. The second surface formed on the valve body on the side opposite the second section preferably extends parallel to the first surface. Advantageously, the first surface and the second surface are aligned with each other.

[0012] The second section of the connecting member can be configured as a first connecting pipe, which can extend away from the first section transversely, especially perpendicularly to the main plane of the first section (especially with its longitudinal axis). The main plane of the first section can extend coplanarly with the main plane of the valve body. Preferably, the length of the first connecting pipe is less than the thickness of the first section of the connecting member perpendicular to its main plane. In other words, the length of the first connecting pipe extending from the first section of the connecting member is preferably less than the thickness of the first section. When the valve assembly is installed at the pressure vessel, the first connecting pipe is preferably used to engage in an opening constructed at the pressure vessel, especially at the axial end of the pressure vessel. In particular, the first connecting pipe can be engaged in an axial, preferably metal end section (so-called boss) of the pressure vessel, and most preferably does not pass through the end section.

[0013] The first connecting pipe is preferably provided with a thread (e.g. an external thread), by means of which the connecting member is screwed into the pressure vessel in the installed state, in particular into the projection. Accordingly, a further thread corresponding to the thread can be configured at the projection (e.g. as an internal thread). In addition, the first connecting pipe can have a circumferentially configured groove at its outer circumference. An O-ring can be arranged in the groove, optionally in combination with an additional support ring for the O-ring, by means of which the second fuel line is sealed relative to the surrounding environment of the connecting member.

[0014] In a similar manner, the valve body can be connected to the connecting member in a fluid-conducting manner. For this purpose, a connecting pipe (hereinafter: second connecting pipe) can also be constructed at the valve body. The connecting member can have a receiving portion corresponding to the second connecting pipe, the second connecting pipe extends into the receiving portion, and the second connecting pipe is received in the receiving portion in a sealed manner. Unlike the first connecting pipe, the second connecting pipe is preferably configured as a threadless pipe (i.e., without a thread provided for the connection structure between the valve body and the connecting member), because the fixing of the valve body at the connecting member - as described above - is preferably achieved by means of the one / multiple flanges. Preferably, the first fuel line extends through the second connecting pipe and ends at the second fuel line, which leads into the receiving portion. The second connecting pipe can also be provided with a groove, which extends in the circumferential direction (along its outer peripheral surface). In the groove of the second connecting pipe, an O-ring can be arranged similarly to the first connecting pipe, and an O-ring can be arranged in combination with a support ring for the O-ring for sealing.

[0015] If the valve body is fixed to the connecting member by means of the at least one flange, the longitudinal axis of the second connecting pipe can extend transversely, in particular perpendicularly, to the main plane of the flange. Thus, for example, if the first flange is fixed (in particular threaded) to the connecting member, the second connecting pipe can be inherently pressed into the receiving portion. Any longitudinal axis mentioned in the present disclosure can be the central longitudinal axis of the corresponding element / section. Preferably, the longitudinal axis of the second connecting pipe also extends parallel to the main plane of the valve body or extends in the main plane of the valve body. This can help the valve body to withstand relatively high pressures in a compact, relatively thin structural form. As a result, the longitudinal axis of the first connecting pipe can extend perpendicularly to the longitudinal axis of the second connecting pipe and define a cross-sectional plane passing through the valve body and the connecting member. The cross-sectional plane can extend perpendicularly to the above-mentioned first and / or second surface.

[0016] The first and second fuel lines together form a fuel flow path along which the fuel can flow from the pressure vessel through the valve assembly to the extraction connection for the fuel extraction line. In the connecting component, the second fuel line preferably has a first end in the first section and a second end in the second section, wherein the first end is arranged closer to the valve body than the second end. The receiving part can be formed at the first end so that the first end is the downstream end of the second fuel line with respect to the fuel extraction flow. The second end can accordingly be the upstream end of the second fuel line and face the inner area of ​​the pressure vessel.

[0017] Preferably, the second fuel line extends at the first end in a first direction and at the second end in a second direction, wherein the first direction and the second direction are different and preferably oriented perpendicularly to each other. That is, the second fuel line does not extend in a straight line through the connecting component, but is bent therein. Accordingly, the valve assembly can be better fitted into the relatively narrow construction space at the axial end of the pressure vessel. Thus, the pressure vessel system with the valve assembly can be integrated in a construction space-efficient manner into the narrow edge region of a relatively flat construction space in the floor area of ​​a motor vehicle.

[0018] Preferably, the connecting element is designed for direct (mechanical and fluid-conducting) connection to exactly one pressure vessel. The connection of the connecting element to further fluid-conducting connections of other pressure vessels can be formed indirectly via distributor lines connected to the connecting element. Thus, in a preferred variant, the connecting element can include a connection for the distributor line, which is connected to the second fuel line in a fluid-conducting manner. Furthermore, the connecting element can be provided with a (especially heat-activatable) pressure relief device, which is preferably connected to the second fuel line in a fluid-conducting manner.

[0019] Accordingly, it can be provided that in the connecting member, a distribution flow path leading to a connection for a distributor line and / or a pressure relief flow path leading to a pressure relief device branches off from the second fuel line. Preferably, the distribution flow path and the pressure relief flow path branch off from the second fuel line, in particular at the same location, but in different directions. The location can be the location where the second fuel line is bent and / or can be the location where the main plane of the connecting member intersects the longitudinal axis of the first connecting tube. The distribution flow path and the pressure relief flow path can preferably extend parallel to a common plane, most preferably parallel to the main plane of the connecting member.

[0020] Preferably, no valves or other devices suitable for controlling the flow rate of fuel are arranged in the second fuel line, in the distribution flow path and / or in the pressure relief flow path. Accordingly, the second fuel line, the distribution flow path or the pressure relief flow path can be designed for permanent fuel guidance. Thus, for example, during the intended use of the valve assembly, pressurized fuel from the distributor line and / or from the pressure vessel can reach the pressure relief device at any time in order to be reliably discharged.

[0021] Most preferably, no further valves are constructed at the connecting component except in the pressure relief device. All other valves of the valve assembly can preferably be arranged at the valve body (in the form of functional subassemblies). It goes without saying that the pressure relief device can be set up for pressure relief. Pressure relief is a process by which the pressure in the pressure vessel is reduced due to an event. In particular, the event is not a prescribed withdrawal for supplying an energy converter, but in particular a fault situation. Pressure relief can begin with at least partial opening of the valve (for example due to the bursting of a bursting element). If a fault situation occurs due to a functional failure of another component and / or due to external thermal and / or mechanical effects (such as accidents, local fires, etc.), the pressure relief device is set up to reduce the pressure in the pressure vessel system, in particular the pressure in at least one pressure vessel. According to regulations, the pressure relief device can be configured to achieve the following fuel extraction mass flow in order to relieve pressure on the pressure vessel, which fuel extraction mass flow is greater than the maximum fuel extraction mass flow through the first fuel line (for example, the fuel extraction mass flow is at least 1.5, 2, 5, 10, 100 times higher than the maximum fuel extraction mass flow through the first fuel line).

[0022] As already mentioned, the pressure relief device can be a thermally activatable pressure relief device (TPRD; also called thermal fuse or thermally triggered safety valve). Due to its location at the connecting component, the thermally activatable pressure relief device is arranged close to the pressure vessel and can thus advantageously be triggered with high precision when the pressure vessel is threatened with thermal damage. The thermally activatable pressure relief device can be designed accordingly to be triggered when heating occurs (for example due to a flame in the surroundings of the connecting component) in order to discharge the fuel flowing through the pressure relief flow path from the at least one pressure vessel into the surroundings.

[0023] The pressure relief device can be fixed in a further receiving portion configured for the pressure relief device in the base body of the connecting member. The longitudinal direction of the receiving portion for the pressure relief device can extend transversely, in particular perpendicularly, to the longitudinal direction of the receiving portion for the second connecting tube and transversely, in particular perpendicularly, to the longitudinal direction of the first connecting tube. The discharge portion of the pressure relief device, which is configured for discharging fuel, can be aligned at an opening in the base body of the connecting member so that the fuel to be discharged can flow out of the connecting member through the opening. The outflow direction of the fuel is preferably parallel to the main plane of the connecting member, perpendicular to the longitudinal direction of the first connecting tube and / or parallel to the longitudinal direction of the second connecting tube.

[0024] The valve body is preferably provided with a plurality of functional subassemblies for controlling one or more flow sections through the valve body. One of these subassemblies may be the aforementioned shut-off valve. Other functional subassemblies may be: a filling connection, by means of which fuel can flow from the filling line into the valve body when filling the pressure vessel; a discharge valve, by means of which fuel can be discharged from the pressure vessel into the surroundings of the valve assembly; at least one solenoid valve at the first fuel line; and / or an extraction connection, by means of which fuel can leave the valve body from at least one pressure vessel in the direction of the drive assembly of the motor vehicle. When the shut-off valve is open, all these functional subassemblies can be connected to the end of the first fuel line on the valve body side in a fluid-conducting manner.

[0025] The shut-off valve (also referred to as: tank shut-off valve) is preferably a manually operable valve. The shut-off valve can be arranged to limit the fuel flow between the connecting member and the valve body, in particular to prevent the fuel from flowing from the connecting member into the valve body. In contrast, during the prescribed use of the valve assembly, the shut-off valve can be open and is therefore referred to as a standard open ("normally open") valve. The shut-off valve preferably has a valve element that is displaceable (preferably threaded) parallel to the main plane of the valve body, preferably perpendicular to the longitudinal axis of the first connecting pipe and / or perpendicular to the longitudinal axis of the second connecting pipe. The valve element is arranged to preferably shift toward a sealing seat that is configured as a part of the valve body so as to close the first fuel line. In a particularly compact design, the first fuel line has a change of direction (e.g., bending and / or bending) in the region of the sealing seat of the shut-off valve. That is, the opening configured at the sealing seat can be a part of the first fuel line.

[0026] The first fuel line can be closed by means of a shut-off valve, while the second fuel line in the connecting component can be designed so that it cannot be closed separately (especially without a valve). Along the withdrawal flow path starting at the pressure vessel and leading to the fuel withdrawal line, the shut-off valve can be the first valve downstream of the pressure vessel. Accordingly, the shut-off valve can be a valve whose inlet pressure (essentially) corresponds to the vessel pressure. If the shut-off valve can be actuated electromechanically, it can preferably be a controllable or adjustable valve that is closed, especially when no current is applied.

[0027] The extraction connection for the fuel extraction line is arranged at the end of the first fuel line opposite the connecting member. Preferably, a solenoid valve is arranged at the first fuel line, in particular between the shut-off valve and the connection. The solenoid valve and the shut-off valve can in particular be connected in series (logically). The solenoid valve can be designed to limit the fuel flow through the extraction connection for the fuel extraction line. Accordingly, the solenoid valve can be the last valve along the extraction flow path at the valve body, through which the fuel flows before it flows out of the valve assembly.

[0028] In addition, a fuel filling path can be constructed in the valve body, which extends from the filling connection of the valve body to the connecting member. The fuel filling path can be blocked (blockable) by means of a shutoff valve. The filling connection can be configured for connecting a filling line and preferably has a thread for this purpose. In addition, a check valve can be provided at the filling connection, which can prohibit the fuel from flowing back from the valve body into the filling line. Preferably, the fuel filling path opens into the first fuel line between the shutoff valve and the solenoid valve.

[0029] In addition, a fuel discharge path can be constructed in the valve body, through which the first fuel line can be connected to a discharge valve for discharging fuel into the surrounding environment of the valve body in a fluid-conducting manner. The fuel discharge path can branch off from the first fuel line at the following position of the first fuel line, at which the fuel filling path leads into the first fuel line. Accordingly, the hole extending linearly through the valve body can construct a part of the fuel filling path and the fuel discharge path at least in sections, so that the valve body can be simply produced. The hole can be closed by means of a discharge valve. The discharge valve can have a discharge opening for discharging fuel from the at least one pressure container. According to regulations, the discharge valve can be provided for limiting the fuel flow through the discharge opening. It is also conceivable that the discharge valve is designed as an overpressure valve.

[0030] Preferably, the valve body and / or the base of the connecting component are respectively constructed without joints (integrally). In particular, the valve body and the base can each be composed of solid material. The valve body or the base can each be manufactured from a semi-finished product composed of solid material, preferably manufactured by cutting. Then, a functional subassembly can be provided at the valve body or at the base, for example, the functional subassembly can be screwed in. The first section of the valve body and the connecting component can thus be constructed to be the same thickness at least in sections, especially at the interface between the connecting component and the valve body (with respect to the main plane), so as to improve the structural space efficiency of the valve assembly. The interface can extend from the first flange to the second flange. When observed along the main plane of the valve body, the contour of the valve body at the interface can correspond to the contour of the connecting component. Therefore, the valve assembly according to the current technology can be characterized by a compact and stable structural form.

[0031] The pressure vessel system for a motor vehicle proposed herein is preferably provided for storing pressurized fuel and comprises at least one pressure vessel and at least one valve assembly described in detail above and mounted on one of the pressure vessels. The number of pressure vessels is preferably at least two, that is, the pressure vessel system preferably comprises a pressure vessel assembly with a plurality of pressure vessels among the pressure vessels, including a first pressure vessel and one or more second pressure vessels. Accordingly, the connecting member can be mounted directly on the first pressure vessel, in particular screwed into the first pressure vessel. That is, the second section of the connecting member can extend into the first pressure vessel.

[0032] In order to connect the second pressure vessel(s) to the first and second fuel lines (and thus to the withdrawal flow path) in a fluid-conducting manner, the distributor line can be connected to the connection for the distributor line on the one hand and to the connection of the second pressure vessel on the other hand. If a plurality of second pressure vessels are provided, these second pressure vessels can be connected to one another in a fluid-conducting manner by means of a (common) distributor line. Preferably, the pressure vessel system here contains fewer valve assemblies than pressure vessels. In a pressure vessel system with a plurality of pressure vessels, the first pressure vessel is preferably arranged more towards the edge.

[0033] In particular, the distributor line can be arranged upstream of the (high-pressure) pressure reducer. The distributor line is expediently designed to withstand a pressure that is substantially the same as or higher than that of the pressure vessel. The second pressure vessels can be directly fluidically connected to each other via the distributor line, so that according to the connecting pipe principle, the second pressure vessels have substantially the same pressure in the prescribed state. In other words, the second pressure vessel is preferably connected to the distributor line without a separate stop valve that can be electrically actuated from the outside being arranged between the distributor line and the second pressure vessel. In addition, the distributor line can include a plurality of separate line sections, which respectively directly connect two adjacent second pressure vessels to each other.

[0034] Thus, a single valve assembly for the entire pressure vessel system, which can be easily mounted on the first pressure vessel, is substantially sufficient to enable controlled and reliable filling of the pressure vessel with fuel and corresponding extraction of fuel from the pressure vessel. This makes it possible to save material, costs and time when producing the pressure vessel system and the motor vehicle with the pressure vessel system. In addition, the pressure vessel system can be designed in a coordinated manner to be space-efficient.

[0035] The motor vehicle proposed here can be a ground vehicle (especially a passenger car or a commercial vehicle), an air vehicle or a water vehicle. The motor vehicle comprises the pressure vessel system described in detail above and is therefore characterized by the advantages explained above. Advantageously, the pressure vessel system is arranged in the floor area of ​​the motor vehicle, especially between two axles.

[0036] Furthermore, the pressure vessel system and / or the motor vehicle can have any, in particular all, of the features described above in connection with the valve assembly.

[0037] The manufacturing method proposed herein is used to manufacture the mentioned pressure vessel system and comprises the following steps, which are preferably performed in the order mentioned below: providing at least one (especially first) pressure vessel; installing a connecting member at the (first) pressure vessel; performing a safety check at the (first) pressure vessel; and connecting the valve body to the connecting member after the safety check. In addition, preferably, a stop valve and / or possible other functional subassemblies are provided at the valve body before connecting the valve body to the connecting member. For example, the safety check may include subjecting the (first) pressure vessel to a pressure test, in which the internal pressure of the pressure vessel is increased to a predetermined value at least once and then reduced again.

[0038] In order to repair the pressure vessel system, for example when one of the functional subassemblies fails, fuel can be discharged from the pressure vessel system, in particular via a discharge valve, in the repair method additionally disclosed here. The valve body can then be removed from the connecting component and repaired, for example by replacing the defective functional subassembly. The valve body can then be mounted again at the connecting component together with the functional subassembly to complete the repair method.

[0039] In other words, the technology disclosed here relates to a compact valve assembly for use in a hydrogen storage structural space in the floor area of ​​a passenger car, which can be used alternatively for a high-pressure storage device of a battery electric vehicle. Unlike an OTV that is screwed into a pressure vessel, the valve body can and is currently allowed to be replaced during maintenance service. An adapter (connecting component) is screwed into exactly one pressure vessel of a flat storage device with multiple pressure vessels, the adapter being provided with a line connection via which the adapter can be connected to a further vessel and which additionally contains a flange interface for the actual valve assembly (valve body with functional subassemblies). BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Now, the technology disclosed here will be explained with the help of the accompanying drawings. The accompanying drawings schematically show:

[0041] Figure 1A perspective front view of a valve assembly is shown, wherein the valve assembly is installed at a pressure vessel, and a dispenser line, a filling line, and an extraction line are connected at the valve assembly;

[0042] Figure 2 Show Figure 1 A longitudinal cross-sectional view of the valve assembly along the main plane of the connecting member;

[0043] Figure 3 Show Figure 1 A cross-sectional view of the valve assembly through the valve assembly and the pressure vessel;

[0044] Figure 4 Show Figure 1 a perspective rear view of a valve assembly in;

[0045] Figure 5 Shown with multiple pressure vessels and Figure 1 Valve assemblies in pressure vessel systems;

[0046] Figure 6 Shown with Figure 5 Pressure vessel systems in motor vehicles; and

[0047] Figure 7 Shown for Figure 5 A method for manufacturing a pressure vessel system. DETAILED DESCRIPTION

[0048] Figures 1 to 4 Shown for Figure 5 2 is a valve assembly 10 for a pressure vessel system 100 for a motor vehicle 200, wherein the pressure vessel system 100 is configured to store pressurized fuel. The pressure vessel system 100 includes a plurality of pressure vessels, including a (first) pressure vessel 14 and a plurality of (second) pressure vessels 16. Figure 1 As shown in FIG. 1 , the valve assembly 10 , and in particular the connecting member 40 of the valve assembly 10 explained in more detail below, is mounted directly at the first pressure vessel 14 and spaced apart from the second pressure vessel 16 .

[0049] The valve assembly 10 comprises a valve body 20, which is configured as a valve block and is itself manufactured without joints (here: made of solid metal material, for example, made of a metal alloy). In addition, the valve assembly 10 also comprises a connecting member 40, which has a base body 76, which is also manufactured without joints and, in the present case, is made of solid metal material like the valve body 20, for example, made of a metal alloy. In other words, the base body 76 is also configured as a valve body / valve block. The valve body 20 and the first section 41 of the connecting member 40 are of the same thickness with respect to the main plane H of the first section 41. In particular, a first fuel line 22 is configured in the valve body 20. In addition, a plurality of functional subassemblies described in more detail below can also be provided at the valve body 20. A shut-off valve 24 is arranged at the first fuel line 22, and the shut-off valve is set up to be able to close the first fuel line 22 when necessary, for example, during maintenance of the pressure vessel system 100.

[0050] The connecting member 40, in particular the base body 76, has a first section 41, which is in contact with the valve body 20 (directly or indirectly). The second section 42 of the connecting member 40 is configured as a first connecting pipe and extends into the first pressure vessel 14. Therefore, in the following, what is said about the first connecting pipe also generally applies to the second section 42. Looking in detail, the first connecting pipe extends from the surface of the first section 41 facing the first pressure vessel 14 in the direction of the first pressure vessel 14. Here, as Figure 3 As shown in , the main extension direction (longitudinal direction) of the first connecting piece (and of the first pressure vessel 14) extends substantially perpendicularly to the main plane H of the first section 41. The first connecting piece is substantially cylindrical, wherein the cylinder axis extends in the longitudinal direction.

[0051] The connecting member 40 functions as an adapter between the valve body 20 and the first pressure vessel 14 and is therefore fixed to the first pressure vessel 14 and to the connecting member 40 by means of a positive connection and / or a non-positive connection, respectively. On the pressure vessel side, the second section 42 / first connecting piece comprises a thread 46 (in particular an external thread), by means of which the connecting member 40 is screwed into the first pressure vessel 14. For this purpose, the first pressure vessel 14, in particular at its projection, has a thread (in this case an internal thread) corresponding to the thread 46 of the second section 42.

[0052] The second fuel line 44 constructed in the connecting component 40 extends axially through the first connecting pipe. The second fuel line 44 not only passes through the second section 42, but also passes through the first section 41, and enters the first fuel line 22 at the boundary between the base body 76 and the valve body 20. Therefore, the second fuel line 44 permanently connects the inner area of ​​the pressure vessel 14 provided for storing fuel with the first fuel line 22 in a fluid-conducting manner when used in accordance with the regulations. Between the first end 54 of the second fuel line 44 in the second section 42 and the second end 56 of the second fuel line 44 in the first section 41, the second fuel line 44 is bent at a right angle, so that the second fuel line extends in a different direction at the first end 54 than at the second end 56. This makes it possible to arrange the valve assembly 10 in a relatively narrow structural space at the axial end of the first pressure vessel 14. A groove is constructed along the circumference of the first connecting pipe to seal the second fuel line 44 in the first connecting pipe relative to the surrounding environment of the valve assembly 10. An O-ring is arranged in the groove; additionally, a (columnar) support ring for supporting the O-ring may be arranged in the groove.

[0053] In contrast, the connecting member 40 is connected to the valve body 20 via a flange, especially by means of a threaded connection structure, that is, the valve body 20 is connected to the connecting member 40 by means of at least one flange. Since this connection structure is also a force-locking / form-locking property, rather than a material-locking property, the valve body 20 can be removed from the connecting member 40, especially from the first section 41, in a non-destructive manner. This opens up new room for maneuver in the maintenance of the valve assembly 10 according to the current technology. The flange connection structure includes a first flange 50 configured at the valve body 20 and a second flange 52 configured at the connecting member 40. As shown in FIG. Figure 1 As shown in , the main planes 51, 53 of the first flange 50 or the second flange 52 extend (substantially) parallel to each other. Through holes are formed in the first and second flanges 50, 52. The screws passing through the through holes are screwed into the connecting member 40 (at the first flange 50) or the valve body 20 (at the second flange 52) in anti-parallel to each other.

[0054] In order to seal the fluid-carrying connection between the connecting component 40 and the valve body 20 as efficiently as possible, a second connecting piece 25 is formed on the valve body 20, through which the first fuel line 22 extends. The connecting component 40 includes a receiving portion 48 corresponding to the second connecting piece 25, in which the second connecting piece 25 is received in a sealing manner. In this case, the longitudinal axis A of the second connecting piece 25 extends substantially perpendicularly to the main planes 51, 53 of the first and second flanges 50, 52 (see Figure 2). It is therefore advantageous if the thread axis of the threaded element is oriented parallel to the longitudinal axis A. Unlike the first connecting piece, the second connecting piece is designed to be threadless. Apart from this, the second connecting piece has the features of the first connecting piece. In particular, the second connecting piece is also cylindrical and contains a groove extending along its outer circumference, in which a further O-ring and optionally a further support ring are arranged.

[0055] In practice, the connecting component 40 serves to connect the valve assembly 10 to the first pressure vessel 40 and to conduct the fuel into and out of the pressure vessel 40 to the distributor line 60 and to the heat-activatable pressure relief device 62. Accordingly, the connecting component 40 comprises a connection 58 for the distributor line 60, which is connected in a fluid-conducting manner to the second fuel line 44. Furthermore, the heat-activatable pressure relief device 62 is embedded in a base body 76 of the connecting component 40 and is connected in a fluid-conducting manner to the second fuel line 44.

[0056] A filling connection 78 , the shutoff valve 24 , the withdrawal connection 64 , the solenoid valve 68 and the drain valve 72 are formed on the valve body 20 . Figure 1 The pipeline paths between these valves or connections are shown with broken lines and dashed lines. The shut-off valve 24 is a manually operable valve and is provided for limiting the fuel flow through the first fuel line 22 and between the connecting member 40 and the valve body 20. During use of the pressure vessel system 100, the manually operable valve is normally open. In order to fluidically seal the first pressure vessel 14 and the second pressure vessel 16 relative to the withdrawal connection 64, the shut-off valve 24 can be closed.

[0057] The filling connection 78 is connected to the first fuel line 22 in a fluid-conducting manner by means of a fuel filling path 74, wherein the first fuel line 22 forms a part of the fuel filling path 74. Accordingly, the fuel filling path 74 extends from the filling connection 78 at the valve body 20 to the connecting component 40 and can be blocked by means of the shut-off valve 24. In addition, a non-return valve is provided at the filling connection, which prevents fuel from flowing back from the valve body 20 into the filling line 79 connected to the filling connection 78 as required.

[0058] The extraction connection 64 is provided for connecting a fuel extraction line 66 at an end of the first fuel line 22 opposite the connecting member 40. In order to improve the space efficiency, the extraction connection 64 is designed so that the fuel extraction line 66 extends away from the valve body 20 on one side of the first pressure container 14, preferably substantially parallel to the main extension direction of the first connecting pipe. The extraction line 66 connects the valve assembly 10 to the fuel supply system of the motor vehicle 200 in a fluid-conducting manner, for example to a pressure reducer 67 (see Figure 5 In order to control the fuel extraction flow (mass flow) through the extraction coupling 64 , a solenoid valve may be arranged at the extraction flow path between the shut-off valve 24 and the extraction section 64 .

[0059] Upstream of the solenoid valve and downstream of the shutoff valve 24, a fuel discharge path 70 can furthermore branch off from the first fuel line 22 in the direction of the discharge valve 72. That is, a fuel discharge path 70 is formed in the valve body 20, via which the first fuel line 22 is connected in a fluid-conducting manner to the discharge valve 72 for discharging fuel into the surroundings of the valve body 20.

[0060] like Figure 5 As shown in FIG. 1 , the pressure vessel system 100 comprises a first pressure vessel 14 and a plurality of (in the present case six) second pressure vessels 16. The first pressure vessel 14 and the second pressure vessel 16 are oriented parallel to each other so that their longitudinal axes lie in one plane. The pressure vessels 14, 16 are fixed with their protrusions on Figure 3 , which is clamped at least in sections between the valve assembly 10 and the dome of the first pressure vessel 14. The first pressure vessel 14 is connected to the connecting component 40 in a fluid-conducting manner by direct connection, while the fluid-conducting connection between the valve body and the second pressure vessel 16 is realized via the distributor line 60. That is, the fuel withdrawal path for withdrawing fuel from the second pressure vessel 16 extends in the following order via the distributor line 60 into the connecting component 40, through the second fuel line 44 and through the first fuel line 22 into the fuel withdrawal line 66. Advantageously, the entire pressure vessel system 100 of the motor vehicle 200 contains only one valve assembly 10 described here, so that it can be manufactured as cost-effectively as possible.

[0061] In addition, the pressure vessel system 100 also has the above Figures 1 to 4 All features of the valve assembly 10 described herein are related.

[0062] The pressure vessel system 100 is configured to be installed between a front axle of a motor vehicle and a rear axle of a motor vehicle. Figure 6The pressure vessel system 100 can be oriented in such a way that the longitudinal axis of the first pressure vessel 14 extends transversely to the vehicle longitudinal direction L. As a result, the valve assembly 10 is preferably arranged between the first pressure vessel 14 and the side sill of the motor vehicle 200. In addition, the motor vehicle 200 has the above-mentioned Figure 4 All features of the pressure vessel system 100 described herein are related.

[0063] at last, Figure 7 A manufacturing method 300 for a pressure vessel system 100 is shown. In the manufacturing method 300, first at least a first pressure vessel 14 is provided in step 302. Then a connecting member 40 is mounted at the first pressure vessel 14 (step 304). The first pressure vessel 14 is subjected to a safety check (step 306), in which the first pressure vessel 14 with the connecting member 40 mounted at the first pressure vessel but without the valve body 20 is pressurized (from the inside). After the safety check is concluded, the valve body 20 can then be connected to the connecting member 40 (step 308), in particular screwed to the connecting member 40.

[0064] For reasons of readability, the expression "at least one" is partially omitted for simplification. If a feature of the technology disclosed herein is described in the singular or indefinite form (such as the one / a fuel line, the one / a shut-off valve, etc.), a plurality of them should also be disclosed at the same time (such as at least one fuel line, at least one shut-off valve, etc.). In the context of the technology disclosed herein, the term "substantially" includes an exact characteristic or an exact value, respectively, and includes deviations that are negligible for the function of the characteristic / value, respectively. Currently, "at least partially" means "partially" or "completely".

[0065] The above description of the present invention is for illustrative purposes only and is not intended to limit the present invention. Various changes and modifications may be made within the scope of the present invention without departing from the scope of the present invention and its equivalents.

Claims

1. A valve assembly (10) for installation at a pressure vessel (14), the valve assembly comprising: - a valve body (20) with a first fuel line (22), and a connecting member (40) having a first section (41) and a second section (42), The valve body (20) is fixed to the first section (41) in a non-destructively detachable manner. The second section (42) is designed to extend at least partially into the pressure vessel (14) when the valve assembly (10) is installed on the pressure vessel (14). A second fuel line (44) constructed in the connecting component (40) extends through the first section (41) and the second section (42) and is arranged to connect an inner area of ​​the pressure vessel (14) to the first fuel line (22) in a fluid-conducting manner when the valve assembly (10) is installed on the pressure vessel (14).

2. The valve assembly (10) according to claim 1, wherein: The valve body (20) is connected to the connecting member (40) via a flange and / or is threadedly connected to the connecting member. And / or, the valve assembly (10) has a shut-off valve (24) at the first fuel line (22), wherein the shut-off valve (24) is arranged to close the first fuel line (22).

3. The valve assembly (10) according to claim 1 or 2, wherein: The first section (41) of the connecting member (40) has a main plane (H), and The second section (42) of the connecting component (40) is designed as a first connecting piece, which extends transversely to the main plane (H) away from the first section (41).

4. The valve assembly (10) according to claim 3, wherein: The first connecting piece is provided with a thread (46), by means of which the connecting component (40) is screwed into the pressure vessel (14) in the installed state.

5. A valve assembly (10) according to any one of the preceding claims, wherein: A second connecting piece (25) is formed on the valve body (20), through which the first fuel line (22) extends. The connecting component (40) has a receptacle (48) corresponding to the second connecting piece (25), in which the second connecting piece is received in a sealing manner.

6. Valve assembly (10) according to the preceding claim, wherein: The valve body (20) is fixed to the connecting component (40) by means of at least one flange (50, 52) formed on the valve body (20) or on the connecting component (40). The longitudinal axis (A) of the second connecting piece (25) extends transversely to the main planes (51, 53) of the flanges (50, 52).

7. A valve assembly (10) according to any one of the preceding claims, wherein: The second fuel line (44) has a first end (54) in the first section (41) and a second end (56) in the second section (42), The first end (54) is arranged closer to the valve body (20) than the second end (56), The second fuel line (44) extends in a first direction at the first end (54) and extends in a second direction at the second end (56), The first direction and the second direction are different.

8. A valve assembly (10) according to any one of the preceding claims, wherein: The connecting component (40) has a connection (58) for a distributor line (60), which is connected to the second fuel line (44) in a fluid-conducting manner.

9. A valve assembly (10) according to any one of the preceding claims, wherein: The connecting component (40) is provided with a heat-activatable pressure relief device (62) which is connected to the second fuel line (44) in a fluid-conducting manner.

10. The valve assembly (10) according to any one of the preceding claims, further comprising an extraction coupling (64) for a fuel extraction line (66) at an end of the first fuel line (22) opposite to the connecting member (40), A solenoid valve (68) is arranged on the first fuel line (22) and is designed to limit a fuel flow through a withdrawal connection (64) for the fuel withdrawal line (66).

11. A valve assembly (10) according to any one of the preceding claims, wherein: A fuel discharge path (70) is formed in the valve body (20), through which the first fuel line (22) is connected in a fluid-conducting manner to a discharge valve (72) for discharging fuel into the surroundings of the valve body (20), And / or, a fuel filling path (74) is configured in the valve body (20), and the fuel filling path extends from a filling connection portion (78) of the valve body (20) to the connecting member (40).

12. A valve assembly (10) according to any one of the preceding claims, wherein: The valve body (20) and the first section (41) of the connecting component (40) are at least partially constructed to be of the same thickness. And / or the valve body (20) and / or the base body (76) of the connecting component (40) are each designed without joints.

13. A pressure vessel system (100) for a motor vehicle, the pressure vessel system comprising: - at least one pressure vessel (14, 16), and - At least one valve assembly (10) according to any one of the preceding claims, mounted at one of the pressure vessels (14, 16).

14. The pressure vessel system (100) according to claim 13 in combination with claim 8, wherein: The number of the pressure vessels (14, 16) is at least two, and The valve assembly (10) is installed at a first pressure vessel (14) among the pressure vessels (14, 16), and A second pressure vessel (16) of the pressure vessels (14, 16) is connected to the connecting component (40) in a fluid-conducting manner by means of a distributor line (60) connected to the connecting component (40).

15. A motor vehicle (200) having a pressure vessel system (100) according to any one of the two preceding claims.

16. A method (300) for manufacturing a pressure vessel system (100) according to any one of claims 13 and 14, the method comprising the following steps: - providing (302) said at least one pressure vessel (14); - installing (304) the connecting member (40) at the pressure vessel (14); - performing (306) a safety check at the pressure vessel (14); and - After the safety check, the valve body (20) is connected (308) to the connecting member (40).

Images