EP4067726B1 - Valve for closing a gas container - Google Patents

Description

FIELD OF THE INVENTION

The present invention relates to a valve for closing a gas container, the valve comprising a valve body with a continuous longitudinal bore along a longitudinal axis, in which longitudinal bore a displaceably guided valve tappet is mounted, the valve body extending in a longitudinal direction parallel to the longitudinal axis from a connection area with a end surface on the connection side to a fastening area with an end surface on the gas container side, the fastening area having a smaller diameter than the connection area and the connection area having a stop surface in order to provide a stop for a base body head of the gas container when the fastening area is inserted through an opening in the base body head into the latter .

STATE OF THE ART

Gas containers filled with gas can be connected in a gas-tight manner to a device, for example a soda siphon, a whipped cream siphon or a pressure regulator, in order to ensure a corresponding gas supply to the siphon or the device.

It is known that carbonated drinks, especially soda, and whipped cream by means of a siphon, cooperating with an appropriate gas tank, for the needs of a user, whereby the water is enriched with carbon dioxide (CO2) or the cream with nitrous oxide (N2O) from the gas tank. Furthermore, gas containers filled with nitrogen (N2) or argon (Ar) are becoming more and more important for a wide variety of applications, in particular with siphons or siphon bottles.

Since high pressures are necessary to ensure an optimal result, there is a risk of the gas container bursting in an uncontrolled manner. In the same way, when using any valves which are arranged in the area of a gas container neck in the case of commercially available capsule-shaped gas containers, there is a risk that the valve or its valve body will be pressed out of the gas container by the high pressures. Likewise, if the neck of the gas container is weakened by the arrangement of the valve, a ductile bursting can occur, in particular at temperatures higher than 130° C., as a result of which the user can sustain any injuries.

To that end, the EP 0 867 656 B1 a pressurized gas capsule with a valve body, the valve body being pressed to the gas container only via a simple groove, so that at high pressure there is a risk of the valve body being pushed out of the gas container. In order to limit the freedom of movement of a valve tappet that is mounted displaceably along a longitudinal axis in a continuous longitudinal bore, the valve body has projections that protrude radially inward only in a plane that is normal to the longitudinal axis, which, however, do not properly ensure a secure pressure-based movement or even retention of the valve tappet.

OBJECT OF THE INVENTION

It is therefore an object of the present invention to create a valve for a gas container which avoids the disadvantages mentioned. In particular, with the valve according to the invention, even at high pressure of the gas in the gas tank, protection should be ensured against the valve or a valve body of the valve being pushed out or pushed out of the gas tank, with preferably additionally a secured pressure-based movement and mounting of a displaceable valve in the valve body mounted valve tappet should be guaranteed.

PRESENTATION OF THE INVENTION

In order to achieve the stated object, a valve for closing a gas container has a valve comprising a valve body with a continuous longitudinal bore along a longitudinal axis, in which longitudinal bore a displaceably guided valve tappet is mounted, the valve body extending in a longitudinal direction parallel to the longitudinal axis from a connection area with an end face on the connection side to a fastening area with an end face on the gas container side, the fastening area having a smaller diameter than the connection area and the connection area having a stop surface in order to provide a stop for a base body head of the gas container when the fastening area passes through an opening in the base body head is inserted into this, according to the invention that the valve body has a double groove on the lateral surface in the fastening area, the double groove comprising two individual grooves following one another in the longitudinal direction, which are separated from one another by a sealing lug pointing away from the longitudinal axis in order to enable gas-tight compression of the base body head with the fastening area in the area of the double groove when the fastening area with the double groove is pushed into the base body head.

The terms "connection side" and "gas tank side" are to be understood with regard to the intended use. Likewise, one could speak of a first end face (instead of an end face on the connection side) and a second end face (instead of an end face on the gas container side).

In other words, two individual grooves located one behind the other are arranged in the fastening area on the lateral surface of the valve body in such a way that an elevation is formed between them. This elevation forms the sealing nose, through which the valve body can be connected in a gas-tight manner by means of two compressions formed one behind the other on the gas container or on its gas container neck or base body head. This means that a double pressing of the valve body with the gas container by means of a forming process, preferably a rolling (a manufacturing process known per se for forming rotationally symmetrical semi-finished products, whereby in the case of tubular semi-finished products by controlled closing of internal and/or external shape-determining tools and by continuous rolling on the beads or grooves running around the workpiece can be produced), which can reliably prevent the gas container from bursting, in particular in the area of the gas container neck, or the valve body from being pressed out of the gas container neck or the head of the base body at more than 500 bar, preferably up to a maximum pressure of 550 bar.

In detail, such an arrangement ensures that the gas tank at a pressure that is at a maximum permissible fill factor of 0.75 kg/l (for carbon dioxide (CO2) or nitrous oxide (N2O)) and a temperature of approx. 130°C, preserves its integrity and shape. At the same time, the limited available installation space is optimally taken into account by the double groove.

With regard to the connection area, it should be noted that this extends in the longitudinal direction from an initial area (comprising the end face on the connection side) to an end area (comprising the stop face). The diameter of the connection area, particularly in its end area, is larger than the diameter of the fastening area, which typically applies to the entire fastening area.

Each individual groove has an individual groove base. The sealing lug protrudes beyond these individual groove bases.

As stated, a reliable pressing between the head of the base body and the fastening area in the area of the double groove is made possible when the fastening area together with the double groove is pushed into the head of the base body. In this case, the fastening area is preferably pushed completely or so far into the base body head that the base body head contacts the stop surface acting as a stop.

In a preferred embodiment, the continuous longitudinal bore comprises at least three bore sections with at least two different diameters. This enables the drill sections to be functionalized differently, with larger diameters being advantageous with regard to unhindered gas flow, for example, and a smaller diameter proving to be advantageous for the bearing of the valve tappet.

In a particularly preferred embodiment of the valve according to the invention it is provided that at least one first drilling section is arranged in the connection area and that at least a second and third drilling section are arranged in the fastening area. This arrangement not only proves to be particularly favorable in terms of production technology, but can also be advantageous with regard to the different functionality of the individual drilling sections. Particularly if, for example, the bore section provided for mounting the valve tappet is arranged in the fastening area, a mechanically extremely stable mounting is ensured when the fastening area is pushed into the base body head of the gas container and pressed gas-tight with it.

Of course, it is also conceivable that more than one first drilling section is arranged in the connection area and/or that more than two drilling sections (or more than the second drilling section and the third drilling section, e.g. a fourth or a fourth and a fifth drilling section) are provided in the fastening area could be.

In accordance with the above, it is provided in a particularly preferred embodiment of the valve according to the invention that the second drilling section located between the first drilling section and the third drilling section has a smaller diameter than the first drilling section and the third drilling section, with the valve tappet being slidably mounted in the second drilling section is.

In a preferred embodiment of the valve according to the invention, it is provided that the valve body has a first snap-in lug arrangement in the longitudinal bore in the fastening area, preferably in a third bore section of the longitudinal bore, through which first snap-in lug arrangement a section-wise narrowing of the longitudinal bore in the fastening area, preferably in the third Drilling section, is ensured, wherein the first snap-in nose arrangement has at least one bulge pointing towards the longitudinal axis. This first snap-in lug arrangement serves to ensure a secure, pressure-based movement and retention of the valve tappet in the valve body while the gas container is being filled with gas. In concrete terms, the valve tappet can be moved from a closed position, in which the valve or the longitudinal bore is closed in a gas-tight manner by the valve tappet, along the longitudinal axis in the longitudinal direction into a filling position. In the filling position, the valve tappet releases the valve or the longitudinal bore for gas, so that gas can flow through the valve or the longitudinal bore, the valve tappet being in contact with the first snap-in nose arrangement. This means that the first snap-in lug arrangement prevents further movement of the valve tappet in the longitudinal direction by means of a positive fit.

However, by applying a sufficiently large force in the longitudinal direction - or in principle also against the longitudinal direction - the valve tappet can be pushed at least in sections over the first snap-in nose arrangement or over its at least one bulge, with the at least one bulge receding elastically away from the longitudinal axis. This elasticity can be ensured by the choice of material for the valve body.

In order to ensure both the greatest possible freedom of movement and retention of the valve tappet, it is provided in a particularly preferred embodiment of the valve according to the invention that the first snap-in lug arrangement comprises three bulges, which are arranged at least in sections in a plane normal to the longitudinal axis. This narrowing in sections, caused by the three bulges, causes a particularly reliable positive position fixing of the valve tappet.

Angular spacing of the bulges from one another allows for unhindered gas flow when the valve stem is in the fill position and abuts the first snap lug assembly. In a particularly preferred embodiment of the valve according to the invention, it is provided that the three bulges of the first snap-in nose arrangement are arranged, preferably symmetrically, at an angular distance of 120° from one another, the angular distance being measured around the longitudinal axis. This guarantees an unhindered flow of gas in a particularly reliable manner, so that the gas can flow between the valve tappet, the bulges and an inner wall of the longitudinal bore when the gas container is being filled and when the gas container is being emptied.

In a particularly preferred embodiment of the valve according to the invention, it is provided that the valve body has a second snap lug arrangement in the longitudinal bore in the fastening area, preferably in the third bore section, between the first snap lug arrangement and the end surface on the gas container side, through which second snap lug arrangement a further narrowing of the longitudinal bore in the fastening area is achieved in sections , preferably in the third drilling section, is ensured, with the second snap-in lug arrangement having at least one bulge pointing towards the longitudinal axis. This second snap-in lug arrangement is used for secure pressure-based movement and retention of the valve tappet in the valve body while the gas tank is being emptied, with the gas flowing out of the gas tank into a device, preferably into a siphon. In other words, in this emptying position, the valve tappet is partially pushed over the first snap-in lug arrangement in the longitudinal direction, so that a portion of the valve tappet is arranged between the first and the second snap-in lug arrangement. Another move in Longitudinally beyond the second snap-in lug arrangement is basically prevented by positive locking.

However, by applying a sufficiently large force in the longitudinal direction - or in principle also against the longitudinal direction - the valve tappet can be pushed at least in sections over the second snap-in nose arrangement or over its at least one bulge, with the at least one bulge receding elastically away from the longitudinal axis. This elasticity can be ensured by the choice of material for the valve body.

Correspondingly, when the valve is assembled, the valve tappet can be pushed counter to the longitudinal direction over the second snap-in lug arrangement and over the first snap-in lug arrangement.

In order to ensure the greatest possible freedom of movement and retention of the valve tappet, a particularly preferred embodiment of the valve according to the invention provides for the second snap-in lug arrangement to have three bulges, which are arranged at least in sections in a plane normal to the longitudinal axis. This narrowing in sections, caused by the three bulges, causes a reliable, form-fit positional fixing of the valve tappet.

Angular spacing of the lobes of the second snap lug assembly from one another allows for unimpeded flow of gas when the valve stem is in the deflation position and abuts the second snap lug assembly. In a particularly preferred embodiment of the valve according to the invention, it is provided that the three bulges of the second snap-in lug arrangement are preferably symmetrically spaced at an angular distance of 120° are arranged to each other, the angular distance being measured around the longitudinal axis. This guarantees an unhindered flow of gas in a particularly reliable manner, so that the gas can flow between the valve tappet, the bulges of the second snap-in lug arrangement and an inner wall of the longitudinal bore both when the gas container is emptied and when the gas container is filled.

In order to ensure an optimal gas flow that is as unhindered as possible when the valve tappet is in the emptying position, it is provided in a particularly preferred embodiment of the valve according to the invention that the bulges of the first and second snap-in lug arrangements are congruent to one another or rotated by 60° to one another, viewed along the longitudinal axis are arranged.

In order to prevent the valve tappet from sliding out of the valve body, in particular during the filling of the gas container, it is provided in a particularly preferred embodiment of the valve according to the invention that the valve tappet has a thickening which is directed towards the end surface on the gas container side and is at least partially conical and which at least in sections, in particular in an end region pointing towards the end surface on the gas container side, has a maximum diameter which is larger than the diameter of the narrowing in sections formed by the first snap-in nose arrangement. As already explained above, this in particular defines the filling position, i.e. when the plunger moves out of the closed position in the longitudinal direction until it abuts against the first snap-in nose arrangement.

Analog is provided in a particularly preferred embodiment of the valve according to the invention that the Maximum diameter of the thickening is greater than the diameter of the further narrowing in sections formed by the second snap-in lug arrangement. As already explained above, this particularly defines the emptying position, ie when the valve tappet moves further from the filling position in the longitudinal direction (at least with a section having the maximum diameter) over the first snap-in lug arrangement until it abuts the second snap-in lug arrangement.

A secure, pressure-based movement and retention of the valve tappet, which is movably mounted in the valve body, is thus guaranteed. Accordingly, the valve tappet serves on the one hand as a sealing element to the valve body and on the other hand as an opening element.

It should be noted here that the maximum diameter of the valve tappet is smaller than a diameter of an opening cross section of the longitudinal bore in the fastening area or the third bore section. This allows gas to flow past between the thickening and the inner wall of the longitudinal bore or the inner wall of the third bore section.

In a preferred embodiment, the valve tappet is made of metal, preferably steel or stainless steel or brass, or ceramic.

In a particularly preferred embodiment of the valve according to the invention, it is provided that the valve body is made from a high-temperature-resistant plastic, in particular from polyethersulfone (PES) or polysulfone (PSU) or polyetheretherketone (PEEK) or polyphenylene sulfide (PPS) or polyphenylsulfone (PPSU) or polyetherimide (PEI). , is manufactured. In interaction with the valve tappet, optimal tightness can thus be achieved stability at temperatures of at least approx. 130°C is guaranteed.

Furthermore, there is sufficient elasticity of the material in order to realize the first and second snap-in nose arrangement with elastic bulges which are in one piece with the valve body.

Analogously to what has been said above, a gas container with a valve according to the invention is provided according to the invention, the gas container comprising a base body with a base body head having an opening, the base body forming an inner volume for receiving gas at least in sections, the fastening area with the double groove passing through the opening in is pushed or pressed into the head of the base body, preferably up to the point where the head of the base body makes contact with the stop surface, and wherein the head of the base body is pressed gas-tight with the fastening area in the area of the double groove. The connection area of the valve body serves to connect the gas container filled with gas to a device, preferably to a cream or soda siphon.

A gas container is thus created which, according to ÖNORM EN 16509, which relates to small portable cylinders, is not designed to be refillable, this being what is known as a one-way gas capsule. Economic disadvantages due to the high costs of refillable capsules, which are based on significantly higher normative requirements, such as individual labeling, recurring individual testing or ensuring food purity when refilling, etc., are thus reliably avoided.

BRIEF DESCRIPTION OF THE FIGURES

Fig. 1

eine Schnittdarstellung eines Ventilkörpers eines erfindungsgemäßen Ventils

Fig. 2

eine Schnittdarstellung analog zu Fig. 1, wobei ein verschiebbar geführter Ventilstößel im Ventilkörper gelagert ist

Fig. 3

eine Schnittdarstellung eines Gasbehälters mit dem erfindungsgemäßen Ventil, wobei der Ventilkörper in den Gasbehälter eingeschoben bzw. eingepresst, jedoch mit diesem noch nicht verpresst ist

Fig. 4

einen vergrößerten Ausschnitt einer Schnittdarstellung X-X aus Fig. 3

Fig. 5

eine Schnittdarstellung des Gasbehälters mit dem erfindungsgemäßen Ventil, wobei der Ventilkörper mit dem Gasbehälter verpresst ist

Fig. 6

eine Detailansicht einer Schnittdarstellung des Gasbehälters mit dem erfindungsgemäßen Ventil, wobei der Ventilstößel in einer Füllposition angeordnet ist

Fig. 7

eine Detailansicht einer Schnittdarstellung des Gasbehälters mit dem erfindungsgemäßen Ventil, wobei der Ventilstößel in einer Schließposition angeordnet ist

Fig. 8

eine Detailansicht einer Schnittdarstellung des Gasbehälters mit dem erfindungsgemäßen Ventil gem. Fig. 7, wobei über dem Gasbehälter ein Einlassventil einer Vorrichtung zur Begasung eines Fluids mit dem Gas aus dem Gasbehälter angeordnet ist

Fig. 9

eine Detailansicht einer Schnittdarstellung des Gasbehälters mit dem erfindungsgemäßen Ventil gem. Fig. 7, wobei ein Anschlussbereich des Ventilkörpers in einer Gasbehälteraufnahme des Einlassventils aus Fig. 8 zumindest teilweise angeordnet ist

Fig. 10

eine Detailansicht einer Schnittdarstellung analog zu Fig. 9, wobei der Anschlussbereich des Ventilkörpers in der Gasbehälteraufnahme vollständig angeordnet ist, sodass der Ventilstößel in einer Entleerungsposition angeordnet ist

Fig. 11

eine Detailansicht einer Schnittdarstellung analog zu Fig. 10, wobei der Anschlussbereich jedoch nicht mehr in der Gasbehälteraufnahme angeordnet ist, aber der Ventilstößel weiterhin in der Entleerungsposition angeordnet ist

The invention will now be explained in more detail using an exemplary embodiment. The figures are exemplary and are intended to explain the idea of the invention, but in no way restrict or even conclusively reproduce it. Further advantageous configurations, details and developments of the invention can also be gathered from the figures. It shows:

1

a sectional view of a valve body of a valve according to the invention

2

a sectional view analogous to 1 , wherein a slidably guided valve tappet is mounted in the valve body

3

a sectional view of a gas tank with the valve according to the invention, the valve body being pushed or pressed into the gas tank, but not yet pressed with it

4

an enlarged detail of a sectional view XX 3

figure 5

a sectional view of the gas tank with the valve according to the invention, wherein the valve body is pressed with the gas tank

6

a detailed view of a sectional view of the gas container with the valve according to the invention, the valve tappet being arranged in a filling position

7

a detailed view of a sectional view of the gas container with the valve according to the invention, the valve tappet being arranged in a closed position

8

a detailed view of a sectional view of the gas tank with the valve according to the invention gem. 7 , An inlet valve of a device for gassing a fluid with the gas from the gas container being arranged above the gas container

9

a detailed view of a sectional view of the gas tank with the valve according to the invention gem. 7 , wherein a connection area of the valve body in a gas container receptacle of the inlet valve 8 is at least partially arranged

10

a detailed view of a sectional view analogous to 9 , wherein the connection area of the valve body is completely arranged in the gas container receptacle, so that the valve tappet is arranged in an emptying position

11

a detailed view of a sectional view analogous to 10 However, the connection area is no longer arranged in the gas container receptacle, but the valve tappet is still arranged in the emptying position

WAYS TO CARRY OUT THE INVENTION

1 shows a valve 39 with a valve body 1 for closing a gas container 24, the valve body 1 comprising a continuous longitudinal bore 3 along a longitudinal axis 2, in which longitudinal bore 3 a displaceably guided valve tappet 17 is mounted, with the valve body 1 moving in a direction parallel to the longitudinal axis 2 extending longitudinal direction 40 of a connection area 18 with a connection-side end surface 20 extends to a fastening area 19 with a gas tank-side end surface 21 . The attachment area 19 has a diameter 23 that is smaller than a diameter 22 of the connection area 18 opposite the attachment area 19. The connection area 18 in turn has a stop surface 14 in order to provide a stop for a base body head 27 of the gas container 24 when the attachment area 19 is inserted through an opening 28 of the base body head 27 in this.

The invention provides that the valve body 1 has a double groove 4 on the lateral surface in the fastening area 19, the double groove 4 comprising two individual grooves 41 following one another in the longitudinal direction 40, which are separated from one another by a sealing lug 5 pointing away from the longitudinal axis 2 in order to create a gas-tight seal To enable pressing of the base body head 27 with the fastening area 19 in the area of the double groove 4 when the fastening area 19 with the double groove 4 is pushed into the base body head 27 . In other words, two individual grooves 41 located one behind the other are arranged on the lateral surface of the valve body 1 in the fastening area 19 in such a way that a sealing lug 5 is formed between them in the form of an elevation, as a result of which it is possible to prevent the valve body 1 from being pressed out of the gas container 24 even at increased pressure is.

Here is in 1 as well as 2 It can be seen that in the exemplary embodiment shown, the continuous longitudinal bore 3 is composed of at least a first drill section 8, a second drill section 9 and a third drill section 10, with at least two of the three drill sections 8, 9, 10 having different diameters 11, 12, 13. In detail, the first drilling section 8 is predominantly in the connection area 18 and the second drilling section 9 and third drilling section 10 is mainly arranged in the fastening area 19 .

In order to enable both optimal gas filling and gas emptying, the second drilling section 9 located between the first drilling section 8 and the third drilling section 10 has a smaller diameter 12 than the first drilling section 8 and the third drilling section 10, with the valve tappet in the second drilling section 9 17 is slidably mounted.

In addition, in the exemplary embodiment shown, to ensure a secure pressure-based movement and to hold the valve tappet 17 in a specific position for gas filling, which is referred to below as filling position A, a first snap-in nose arrangement 6 with three bulges 6' pointing to the longitudinal axis 2 is provided in the third drilling section 10. arranged, whereby a sectional narrowing of the third drill section 10 is given. The three bulges 6 ′ of the first snap-in lug arrangement 6 are arranged at least in sections in a plane normal to the longitudinal axis 2 . In order to ensure a narrowing that is as uniform as possible, the three bulges 6' within the third drilling section 10 are arranged symmetrically at an angular distance of 120° from one another, the angular distance being measured around the longitudinal axis 2, see in particular 4 , showing a sectional view XX 3 shows, with a cone-shaped thickening 42 (cf. 2 ) of the valve tappet 17 partially covers the three bulges 6 ′ of the first snap-in lug arrangement 6 .

In order to ensure reliable gas evacuation, in the exemplary embodiment shown, the third drilling section 10 has a second snap-in nose arrangement 7 between the first snap-in nose arrangement 6 and the end face 21 on the gas container side, with three snap-in nose arrangements pointing to the longitudinal axis 2 Bulges 7 ', through which a further sectional narrowing of the third drilling section 10 is guaranteed. This further constriction in sections serves to fix the position of the valve tappet 17 between the first snap-in lug arrangement 6 and the second snap-in lug arrangement 7 in an emptying position C, see also 10 .

The bulges 7 ′ are also arranged, at least in sections, in a plane normal to the longitudinal axis 2 . In order to ensure that the constriction is as uniform as possible, the three bulges 7 ′ are arranged symmetrically at an angular distance of 120° from one another, the angular distance being measured around the longitudinal axis 2 .

In the Figures 1 to 11 It is clearly evident that in the exemplary embodiment shown, the bulges 6' of the first snap-in lug arrangement 6 and the bulges 7' of the second snap-in lug arrangement 7 are arranged congruently, as viewed along the third drilling section 10 or the longitudinal axis 2.

shows in detail 2 that the valve tappet 17 has the at least partially conical thickening 42 directed toward the end surface 21 on the gas container side, with which a gas-tight connection can be formed along a circular sealing edge 16 of the second bore section 9, in which the valve tappet 17 is movably mounted.

Both in 2 as well as in 4 It can be seen that the thickening 42 of the valve tappet 17, which is conically extending at least in sections, has a maximum diameter 43 in an end region pointing towards the end surface 21 on the gas container side, which is larger than the diameter through the first snap-in nose arrangement 6 trained sectional constriction. Furthermore, the maximum diameter 43 is also larger than the diameter of the further narrowing in sections formed by the second snap-in lug arrangement 7 . This ensures both secure guidance and holding or fixing of the valve tappet 17 in the filling position A, a closed position B and the emptying position C. The maximum diameter 43 is smaller than a diameter 13 of an opening cross section 15 of the third bore section 10 in order to ensure problem-free movement of the valve stem 17 as well as an unimpeded flow of gas between the valve stem 17 and an inner wall of the third drilling section 10 .

In order to ensure tightness (when the valve 39 is closed), either the valve tappet 17 should be made of a harder material than the valve body 1 or the valve body 1 should be made of a harder material than the valve tappet 17, which is why the valve tappet 17 is made of metal in the illustrated embodiment , preferably steel or stainless steel or brass, or is made of ceramic, while the valve body 1 is made of a high-temperature-resistant plastic, in particular polyethersulfone (PES) or polysulfone (PSU) or polyetheretherketone (PEEK) or polyphenylene sulfide (PPS) or polyphenylsulfone (PPSU) or Polyetherimide (PEI) is formed.

The Figures 3 to 11 show a gas tank 24 designed with the valve 39 explained above, the gas tank 24 comprising a base body 26 with the base body head 27 having the opening 28 . In this case, the base body 26 forms, at least in sections, an inner volume for receiving gas 29 . The valve body 1 is pushed with its fastening area 19 into the base body head 27, whereby at least in the area of the base body head 27 the fastening area 19 closing the opening 28 of the Valve body 1 is arranged such that the stop surface 14 of the valve body 1 rests on an end face 30 of the head 27 of the base body.

Here is in 3 It can also be seen that in a first step the valve body 1 is pushed or pressed through the opening 28 into the base body head 27 until the stop face 14 of the valve body 1 rests on the end face 30 of the base body head 27 .

figure 5 shows the finished, empty gas container 24, the valve body 1 with the base body head 27 being formed gas-tight by means of compression around the sealing lug 5 of the double groove 4. The connection area 18 of the valve body 1 protrudes outwards from the base body head 27 , the longitudinal axis 2 of the valve body 1 being aligned with a longitudinal axis 25 of the gas container 24 , ie in a line.

1. 1. Anordnen des in dem Ventilkörper 1 des Gasbehälters 24 angeordneten Ventilstößels 17 mit der den Maximaldurchmesser 43 aufweisenden Verdickung 42 basiskörperkopfseitig über bzw. in Längsrichtung 40 gesehen vor der ersten Schnappnasenanordnung 6, wobei der Ventilstößel 17 mit den Ausbuchtungen 6' der anschlussseitigen ersten Schnappnasenanordnung 6 derart in Berührung steht, dass ein Spalt zwischen der Dichtkante 16 und der konusförmigen Verdickung 42 des Ventilstößels 17 gewährleistet ist. Der Ventilstößel 17 ist somit in der Füllposition A, vgl. Fig. 6.
2. 2. Einströmen des Gases 29 über den Anschlussbereich 18 des Ventilkörpers 1 durch den Spalt in den Basiskörper 26 des Gasbehälters 24 (gemäß den eingezeichneten Strömungslinien in Fig. 6), wobei mit Hilfe der ersten Schnappnasenanordnung 6 eine auf den Ventilstößel 17 wirkende, in Längsrichtung 40 gerichtete Kraft aufgenommen wird, welche vom strömenden Gas 29 beim Füllprozess auf den Ventilstößel 17 ausgeübt wird.
3. 3. Bei Erreichen eines vordefinierten Fülldrucks wird der Ventilstößel 17 in Richtung des Basiskörperkopfs 27 nach außen (gegen die Längsrichtung 40) bewegt, wodurch der Spalt zwischen der Dichtkante 16 des Ventilkörpers 1 und der gasbehälterseitigen konusförmigen Verdickung 42 des Ventilstößels 17 geschlossen wird, sodass der Ventilstößel 17 in der Schließposition B angeordnet ist, siehe Fig. 7.

6 shows the valve tappet 17 of the valve 39 of the gas container 24 in the filling position A, wherein the following steps are required to fill the gas container 24 with the gas 29:

1. 1. Arranging the valve tappet 17 arranged in the valve body 1 of the gas container 24 with the thickening 42 having the maximum diameter 43 on the base body head side above or in front of the first snap-in lug arrangement 6 as seen in the longitudinal direction 40, the valve tappet 17 with the bulges 6' of the first snap-in lug arrangement 6 on the connection side is in contact in such a way that a gap between the sealing edge 16 and the conical thickening 42 of the valve tappet 17 is guaranteed. The valve tappet 17 is thus in the filling position A, cf. 6 .
2. 2. Inflow of the gas 29 via the connection area 18 of the valve body 1 through the gap into the base body 26 of the gas container 24 (according to the flow lines shown in 6 ), a force acting on the valve tappet 17 and directed in the longitudinal direction 40, which is exerted on the valve tappet 17 by the flowing gas 29 during the filling process, is absorbed with the aid of the first snap-in nose arrangement 6.
3. 3. When a predefined filling pressure is reached, the valve tappet 17 is moved outwards in the direction of the base body head 27 (against the longitudinal direction 40), whereby the gap between the sealing edge 16 of the valve body 1 and the conical thickening 42 of the valve tappet 17 on the gas tank side is closed, so that the Valve tappet 17 is arranged in the closed position B, see 7 .

In detail, in the third step, the valve lifter 17 is moved based on a pressure difference inside the base body 26 of the gas tank 24 to atmospheric pressure, according to the drawn flow lines.

On the other hand show 9 and 10 an emptying of the gas container 24 using an inlet valve 31 according to 8 , which inlet valve 31 is arranged, for example, on a device for preparing cream or soda.

In detail, the intake valve 31 according to FIG 8 a pin 32, which is held in the inlet valve 31 by means of a threaded connection 35, and a sealing element 38, which is arranged in a groove arranged in a gas container receptacle 36, the gas container receptacle 36 having a diameter adapted to the connection area 18 of the valve body 1 and a stop surface 37 for limiting the path of travel of the inlet valve 31 via the connection area 18 . The pin 32 has an inlet bore 33 and a transverse slot 34 for the flow of the gas 29 from the gas container 24. The sealing element 38 is preferably an O-ring.

For this shows 9 that, in order to empty the gas tank 24, the gas tank receptacle 36 of the inlet valve 31 is arranged over the connection area 18 of the gas tank 24 in such a way that the longitudinal axis 2 of the valve body 1 is aligned with a longitudinal axis of the pin 32 or a longitudinal axis of the gas tank receptacle 36, with the pin 32 presses on the valve tappet 17 so that it is displaced in the direction of the end face 21 on the gas container side. The maximum displacement of the inlet valve 31 via the connection area 18 of the gas tank 24 is limited with the aid of the stop surface 37 of the gas tank receptacle 36, see FIG 10 , wherein the sealing element 38 rests against the lateral surface of the connection area 18, so that any escape of gas is avoided. Here is in 10 It can also be seen that with a maximum displacement of the inlet valve 31 via the connection area 18 of the gas tank 24 the stop surface 37 of the gas tank receptacle 36 is in contact with the connection-side end surface 20 of the valve body 1 .

1. 1. Anordnen des Einlassventils 31 über dem Anschlussbereich 18 des Ventilkörpers 1 des Ventils 39 des Gasbehälters 24, sodass der Anschlussbereich 18 des Ventilkörpers 1 in die Gasbehälteraufnahme 35 des Einlassventils 31 ragt;
2. 2. Schieben des Einlassventils 31 über den Anschlussbereich 18, bis die anschlussseitige Endfläche 20 des Anschlussbereichs 18 an die Anschlagfläche 37 der Gasbehälteraufnahme 36 stößt, wobei der Ventilstößel 17 durch den Stift 32 des Einlassventils 31 in Richtung des Basiskörpers 26 des Gasbehälters 24 über die erste Schnappnasenanordnung 6 geschoben wird. Die Ausbuchtungen 6' der ersten Schnappnasenanordnung 6 weichen dabei elastisch radial nach außen, d.h. von der Längsachse 2 weg, zurück, wenn der Ventilstößel 17 sich in Längsrichtung 40 bewegt und mit der den Maximaldurchmesser 43 aufweisenden Verdickung 42 die Ausbuchtungen 6' passiert. Der den Maximaldurchmesser 43 aufweisende Endbereich der konusförmigen Verdickung 42 des Ventilstößels 17 wird somit zwischen der ersten Schnappnasenanordnung 6 und der zweiten Schnappnasenanordnung 7 in der Entleerungsposition C positioniert, sodass sich der Ventilstößel 17 in der Entleerungsposition C befindet. Ein relativ großer Spalt zwischen der Dichtkante 16 des Ventilkörpers 1 und der konusförmigen Verdickung 42 des Ventilstößels 17 ist hierbei gegeben, vgl. Fig. 10.
3. 3. Strömen von Gas 29 aus dem Gasbehälter 24 über die Längsbohrung 3 des Ventilkörpers 1 durch den Spalt über den Querschlitz 34 des Stifts 32 in dessen Einlassbohrung 33 durch das Einlassventil 31 (gemäß den eingezeichneten Strömungslinien in Fig.10), durch welches das Gas 29 z.B. einer Vorrichtung zur Zubereitung von Sahne oder Soda zuführbar ist.

In detail, the following steps are required to empty the gas container 24:

1. 1. Arranging the inlet valve 31 over the connection area 18 of the valve body 1 of the valve 39 of the gas tank 24, so that the connection area 18 of the valve body 1 protrudes into the gas tank receptacle 35 of the inlet valve 31;
2. 2. Sliding the inlet valve 31 over the connection area 18 until the end surface 20 of the connection area 18 on the connection side abuts the stop surface 37 of the gas tank receptacle 36, with the valve tappet 17 passing through the pin 32 of the inlet valve 31 in the direction of the base body 26 of the gas tank 24 via the first Snap-nose assembly 6 is pushed. The bulges 6' of the first snap-in lug arrangement 6 yield elastically radially outwards, ie away from the longitudinal axis 2, when the valve tappet 17 moves in the longitudinal direction 40 and the thickened portion 42 having the maximum diameter 43 passes the bulges 6'. The end region of the conical thickening 42 of the valve tappet 17 having the maximum diameter 43 is thus positioned in the emptying position C between the first snap-in lug arrangement 6 and the second snap-in lug arrangement 7 , so that the valve tappet 17 is in the emptying position C. There is a relatively large gap between the sealing edge 16 of the valve body 1 and the conical thickening 42 of the valve tappet 17, cf. 10 .
3. 3. Flow of gas 29 from the gas tank 24 via the longitudinal bore 3 of the valve body 1 through the gap via the transverse slot 34 of the pin 32 into its inlet bore 33 through the inlet valve 31 (according to the flow lines shown in Fig Fig.10 ), through which the gas 29 can be fed to a device for preparing cream or soda, for example.

11 shows that after the gas tank 24 has been emptied, the inlet valve 31 is separated from it again, with the valve tappet 17 or the end region of the cone-shaped thickening 42 remaining between the first snap-in nose arrangement 6 and the second snap-in nose arrangement 7 . That is, the valve tappet 17 remains in the emptying position C, so that any refilling of the gas tank 24 is not possible.

REFERENCE LIST

1

valve body;

2

Longitudinal axis of the valve body 1;

3

longitudinal bore;

4

double groove;

5

sealing nose;

6

first snap tab assembly;

6'

bulge of the first snap nose assembly 6;

7

second snap tab assembly;

7'

bulge of the second snap nose arrangement 7;

8th

first drilling section of the longitudinal bore 3;

9

second drilling section of the longitudinal bore 3;

10

third drilling section of the longitudinal bore 3;

11

Diameters of the first drill section 8;

12

diameters of the second drill section 9;

13

diameters of the third drill section 10;

14

stop surface;

15

Opening cross-section of the third drilling section 10;

16

sealing edge;

17

valve lifter;

18

connection area;

19

mounting area;

20

connection-side end face;

21

gas tank side end face;

22

diameter of the connection area;

23

diameter of the fastening area;

24

Gas tank;

25

Longitudinal axis of the gas container 24;

26

base body;

27

base body head;

28

Opening;

29

Gas;

30

end face of the base body head 27;

31

intake valve;

32

Pen;

33

inlet bore of the pin 32;

34

transverse slot of pin 32;

35

threaded connection;

36

gas tank intake;

37

Stop surface of the gas container receptacle 36;

38

sealing element;

39

Valve;

40

longitudinal direction;

41

single groove;

42

Thickening;

43

maximum diameter of the bulge 42;

A

filling position;

B

closed position;

C

emptying position;

Claims (15)

1. Valve (39) for closing a gas container (24), the valve (39) comprising a valve body (1) having a continuous longitudinal bore (3) along a longitudinal axis (2), in which longitudinal bore (3) a displaceably guided valve tappet (17) is mounted, wherein the valve body (1) extends in a longitudinal direction (40) parallel to the longitudinal axis (2) from a connection region (18) with a connection-side end face (20) to a fastening region (19) with a gas container-side end face (21), wherein the fastening region (19) has a smaller diameter (23) than the connection region (18) and the connection region (18) has a stop surface (14) in order to provide a stop for a base body head (27) of the gas container (24) when the fastening region (19) is inserted into the base body head (27) through an opening (28) thereof, characterized in that the valve body (1) has a double groove (4) on the circumferential surface in the fastening region (19), wherein the double groove (4) comprises two individual grooves (41) following one another in the longitudinal direction (40), which are separated from one another by a sealing lug (5) facing away from the longitudinal axis (2), in order to permit gas-tight pressing of the base body head (27) with the fastening region (19) in the region of the double groove (4) when the fastening region (19) with the double groove (4) is pushed into the base body head (27).
2. Valve (39) according to claim 1, characterized in that the continuous longitudinal bore (3) comprises at least three bore sections (8, 9, 10) with at least two different diameters (11, 12, 13).
3. Valve (39) according to claim 2, characterized in that at least a first bore section (8) is arranged in the connection region (18) and in that at least a second and third bore section (9, 10) are arranged in the fastening region (19).
4. Valve (39) according to claim 3, characterized in that the second bore section (9) lying between the first bore section (8) and the third bore section (10) has a smaller diameter (12) than the first bore section (8) and the third bore section (10), wherein the valve tappet (17) is displaceably mounted in the second bore section (9).
5. Valve (39) according to one of claims 1 to 4, characterized in that the valve body (1) has a first snap lug arrangement (6) in the longitudinal bore (3) in the fastening region (19), preferably in a third bore section (10) of the longitudinal bore (3), by means of which first snap lug arrangement (6) a sectional narrowing of the longitudinal bore (3) in the fastening region (19), preferably in the third bore section (10), is ensured, wherein the first snap lug arrangement (6) has at least one bulge (6') facing towards the longitudinal axis (2).
6. Valve (39) according to claim 5, characterized in that the first snap lug arrangement (6) comprises three bulges (6') which are arranged at least in sections in a plane normal to the longitudinal axis (2).
7. Valve (39) according to claim 6, characterized in that the three bulges (6') of the first snap lug arrangement (6) are arranged, preferably symmetrically, at an angular distance of 120° from each other in each case, wherein the angular distance is measured around the longitudinal axis (2).
8. Valve (39) according to one of claims 5 to 7, characterized in that the valve body (1) has a second snap lug arrangement (7) in the longitudinal bore (3) in the fastening region (19), preferably in the third bore section (10), between the first snap lug arrangement (6) and the gas container-side end face (21), by means of which second snap lug arrangement (7) a further sectional narrowing of the longitudinal bore (3) in the fastening region (19), preferably in the third bore section (10), is ensured, wherein the second snap lug arrangement (7) has at least one bulge (7') facing towards the longitudinal axis (2).
9. Valve (39) according to claim 8, characterized in that the second snap lug arrangement (7) comprises three bulges (7') which are arranged at least in sections in a plane normal to the longitudinal axis (2).
10. Valve body (1) according to claim 9, characterized in that the three bulges (7') of the second snap lug arrangement (7) are arranged, preferably symmetrically, at an angular distance of 120° from one another, wherein the angular distance is measured around the longitudinal axis (2).
11. Valve (39) according to one of claims 8 to 10, characterized in that the bulges (6', 7') of the first and second snap lug arrangements (6, 7), as seen along the longitudinal axis (2), are arranged congruent with each other or rotated by 60° with respect to each other.
12. Valve (39) according to one of claims 5 to 11, characterized in that the valve tappet (17) has a thickening (42) which is directed towards the gas container-side end face (21), extends conically at least in sections and has, at least in sections, in particular in an end region facing towards the gas container-side end face (21), a maximum diameter (43) which is greater than the diameter of the sectional constriction formed by the first snap lug arrangement (6).
13. Valve (39) according to claim 12 and according to one of claims 8 to 11, characterized in that the maximum diameter (43) of the thickening (42) is larger than the diameter of the further sectional constriction formed by the second snap lug arrangement (7).
14. Valve (39) according to one of the preceding claims, characterized in that the valve body (1) is made of a high-temperature-resistant plastic, in particular of polyethersulfone (PES) or polysulfone (PSU) or polyetheretherketone (PEEK) or polyphenylene sulfide (PPS) or polyphenylsulfone (PPSU) or polyetherimide (PEI).
15. Gas container (24) having a valve (39) according to one of claims 1 to 14, the gas container (24) comprising a base body (26) with a base body head (27) having an opening (28), wherein the base body (26) forms, at least in sections, an inner volume for receiving gas (29), wherein the fastening region (19) with the double groove (4) is inserted through the opening (28) into the base body head (27), preferably until the stop surface (14) is contacted by the base body head (27), and wherein the base body head (27) is pressed in a gas-tight manner with the fastening region (19) in the region of the double groove (4).

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