EP3500517A1

EP3500517A1 - Barrel having a pressure valve for storing beer, use thereof, method for controlling the pressure in the barrel, barrel hollow floor, modular system for producing a barrel hollow floor and method for filling a barrel

Info

Publication number: EP3500517A1
Application number: EP17777079.9A
Authority: EP
Inventors: Peter HORZ
Original assignee: Ardagh MP Group Netherlands BV
Current assignee: Envases Oehringen GmbH
Priority date: 2016-08-20
Filing date: 2017-08-21
Publication date: 2019-06-26
Also published as: WO2018037332A2; CN109890747B; AU2017316746B2; EP3500516A2; US20210206618A1; US11597643B2; AU2017316746A1; BR112019003230A2; CN109890747A; WO2018037334A1; ES2868678T3; EP3500516B1; WO2018037332A3; CA3034506A1

Abstract

The invention relates to a pressure valve for a container, comprising a pressure valve body (11), a first pressure valve chamber (15), a second pressure valve chamber (16) and a third pressure valve chamber (17), wherein (a) the first pressure valve chamber (15) is formed by the pressure valve body (11) and a first movable piston (12); (b) the second pressure valve chamber (16) is delimited by the pressure valve body (11), the first movable piston (12) and a second movable piston (13) and is connected in a fluid-communicating manner via a filling chamber duct (22) with a first chamber lying outside of the pressure valve; (c) the third pressure valve chamber (17) is delimited by the pressure valve body (11) and the second piston (13) and is connected in a fluid-communicating manner via a first pressure chamber duct (20) with a second chamber lying outside of the pressure valve.

Description

BARREL WITH PRESSURE VALVE FOR STORING BEER, USE THEREOF, METHOD FOR CONTROLLING PRESSURE IN THE BARRIER, BARBED FLOORING, MODULAR SYSTEM FOR MANUFACTURING A BARRIER FLOOR AND METHOD FOR FILLING ONE

BARREL

The invention relates to the technical field of packaging technology. Specifically, the invention relates to a pressure valve for a container whose contents can be conveniently removed by a consumer, in particular the container is under an increased internal pressure compared to the external pressure.

The container is comparatively bulky, significantly larger than a common one

Beverage can and the contents is a drink to be tapped under pressure.

Portable beer kegs, those with a volume of less than 50 liters, in particular under

20 liters and more than 2.5 liters, whose content can be tapped independently by consumers are in two common variants of particular importance.

A variant of such, provided with metallic mantle, portable beer kegs can be emptied by the action of gravitational force. A tap is in the

arranged lower portion of the outside of the container. By opening the tap, the beer can flow out. So that no negative pressure arises in the container, such containers comprise a device which allows air from the environment to reach the interior of the container. Such containers are not very user-friendly, since the barrel is placed, for example, on the edge of a table for filling a glass with beer

must be or the barrel must be supported to the glass below the

Filling the tap. In addition, the durability of the drum contents is reduced

Onset of the barrel significantly reduced by flowing in the outflow of the beer atmospheric oxygen.

Another variant is containers comprising an internal pressure system. Through these systems, the pressure inside is kept above the ambient pressure. This allows the arrangement of the tap in the upper region of the container. As a result, a consumer typically has sufficient space between the lower outlet end of the tap and the level of the container to hold a glass to be filled under the tap, without having to specially position the keg. By the

The use of internal pressure systems, the shelf life of the beer after the onset of the barrel can be up to more than 30 days, since during beer extraction no

Atmospheric oxygen flows into the drum.

A beer keg system of the second variant is known to those skilled in the art from WO 1999/47451

(Heineken Technical Services). There is described a beer keg system comprising a print cartridge located inside the container space filled with beer is arranged and generates an overpressure in this room. The print cartridge comprises activated carbon, whereby a larger amount of pressurized or propellant gas can be introduced into the cartridge with respect to a not provided with activated carbon cartridge without raising the pressure in the cartridge too much. In trade and sale, these cartridges are called "carbonator". For years, this system has proven to be the best-performing solution for portable beer kegs in the market under 20 liters in the market. It became, so to speak, the market standard. Regarding the possible versatility of the filled propellant gas, however, there is a limited flexibility, since such cartridges are purchased from the filler already filled with propellant gas and installed in the beer kegs (as metallic containers) to be later filled by the bottler with the beer. In addition, the wall material of the "carbonator" typically consists of a different metal than the wall material of the beer keg, is stored in the beer. This leads in the recycling process to a mixed scrap (including material of the wall of the

"Carbonators" and material of the outer wall of the beer keg), which is undesirable.

The object of the invention is to provide a system which is inexpensive to produce with high ease of use by a consumer, provides high flexibility in terms of the choice of fuel gas (pressure and type of gas) and a long shelf life of the contents, even after opening of the container

guaranteed.

The object is achieved by the pressure valve according to claim 1 and according to claim 19 and by the use according to claim 36 and according to claim 37.

A container for storing a liquid comprises a filling space (also: filling space), a pressure chamber and a pressure valve. The filling space is formed by a container bottom, a container wall and a container top and in the Befüllraum there is a first pressure. The pressure chamber is formed by the

Container bottom and a pressure chamber floor and in the pressure chamber, there is a second pressure. The pressure valve is connected to the container bottom and the pressure chamber floor. In the open state of the pressure valve, the pressure valve connects the filling chamber and the pressure chamber fluidkommunizierend. In the closed state of the pressure valve, the pressure valve separates the filling chamber and the pressure chamber fluid-tight against each other.

If the second pressure in the pressure chamber is greater than the ambient pressure and / or the pressure in the filling space, forces act on the container bottom and on the Pressure chamber floor, which are each directed from the interior of the pressure chamber floor to the outside. Depending on the pressure difference and the thickness of the material

Pressure chamber bottom and the container bottom can lead to a deformation or buckling of the container bottom and / or the pressure chamber floor. By connecting the pressure valve to the container bottom and to the pressure chamber bottom, some of the forces can be absorbed by the pressure valve.

This allows for a constant pressure difference, the choice of a lower material thickness of the container bottom and / or the pressure chamber floor than a material thickness, which would be necessary while avoiding deformation or buckling of the container bottom and / or the pressure chamber floor. With constant material thickness allows the

Arrangement of the pressure valve, a higher differential pressure (for example, high pressure in the pressure chamber) while avoiding the aforementioned deformation or bulging.

Fluid communicating means that a fluid exchange between two spaces (for example, filling space and pressure space) is possible, in particular fast and not tough. Fluid-tight means that practically no fluid exchange can take place between two rooms; The skilled person understands that perfect sealing of two spaces without any fluid exchange or fluid flow is practically unrealizable. Parasitic flow or exchange is always given, so it is not a practically substantial exchange. A marginal fluid flow or fluid exchange will also take place between two fluid-tight spaces separated from each other, wherein the pressure difference between the two spaces has an influence on the amount of the parasitically exchanged fluid per unit time. In any case, the fluid exchange in the closed state of the pressure valve, so fluid-tight, much lower than the fluid exchange in the open state of the pressure valve, so fluidkommunizierend.

The container bottom and the pressure chamber bottom can each have a recess. In these recesses, the pressure valve can intervene, whereby a force resulting from a pressure difference between the pressure chamber and the Befüllraum and the

Pressure chamber and the environment results, can be recorded.

The pressure valve may have a pressure valve body. At the upper and at the lower end of the pressure valve, in each case a projection may be arranged, wherein the upper and the lower projection project in each case at least partially circumferentially in the r-direction over at least one radial part of the pressure valve body. The can

Projections (top and bottom) may be formed over the entire circumference of the pressure valve or be formed teilumfängänglich. Also a training of several Projections per axial end of the pressure valve (top and bottom) is possible, wherein each of the projections may be formed partially circumferentially.

Preferably, the projection on the upper end of the pressure valve contacts the upper side of the container bottom and the projection on the lower end of the pressure valve contacts the lower side of the pressure chamber bottom. As a result, in turn, the force acting on the container bottom and the pressure chamber floor resulting from the pressure difference described, at least partially be absorbed by the pressure valve.

The projections of the pressure valve may comprise a sealing element. Depending on

Formation of the projections (top and bottom of the pressure valve), a plurality of sealing elements per side of the pressure valve may be arranged or only one

Sealing element or sealing elements may be arranged on a projection or on projections of one side of the pressure valve. By attaching a sealing element is an improved tightness at the contact point between the pressure valve and

Container bottom and / or pressure room floor accessible.

The container may include an outlet conduit with one end and another end. The one end of the outlet conduit may be in the filling space.

In particular, the other end may be outside the container. Typically, a consumer can take a content from the filling space via the outlet line (tap). The container bottom may be curved or dome-shaped, which means that at least a portion of the container bottom is curved or dome-shaped. There is a gap between the end of the outlet line, which is in the filling space and a point on the pressure chamber floor (the surface of the pressure chamber floor). The distance is preferably the shortest distance of a point on the pressure chamber floor and the end lying in the filling space. The shortest distance can be determined by the selection of a point on the pressure chamber floor, which has the smallest distance to the lying in the filling space end of the outlet. The distance between the described end of the outlet conduit and the pressure space bottom may be smaller than a distance between the described end of the outlet conduit and the apex or edge of an opening of the container bottom.

Even if the container bottom is curved or dome-shaped and has a central opening (recess), at a location of the container bottom, where the vertex would lie on the container bottom, if the

Container bottom would not have the opening or the opening would be at a different location, the container bottom has a vertex. Of the

Vertex in this case is to be determined by extrapolation and is at one Location located at the vertex would lie on the container bottom, if no opening in the container bottom is present or the opening is present at another location.

The arrangement of the one end of the outlet duct close to the pressure chamber bottom results in an advantageous removal possibility of the contents of the container via the outlet duct, especially if the contents are a fluid-prone liquid, e.g. Beer, and the level in the filling space is low.

When gas flows from the pressure chamber via the pressure valve in the filling space, the liquid can be foamed in the filling space to a considerable extent. Because of the low density, the foam spreads above the outlet and laterally therefrom and accumulates primarily near the interface in the filling space. One

Consumer takes the container while a significant amount of foam, which is undesirable.

Surprisingly, it has been shown that the described distances between the end of the outlet line lying in the filling space and the container bottom and between the end of the outlet line lying in the filling space and the pressure chamber bottom improve the removal of the contents. Less foam is taken.

In the case of a container with an outlet line, a z-axis can also be formed through the container. The z-axis extends therein from or through the pressure chamber bottom toward the container top. Accordingly, there is a lower numerical value on the z-axis for the pressure chamber floor than for the container top. The end of the outlet line can not be located above (ie at the same height or below) of the pressure valve with respect to the z-axis. This arrangement provides the above-described advantage of taking a smaller portion of

unwanted foam with it.

In a container with outlet and a z-axis, as described above, the container bottom may be curved or dome-shaped. In this case, at least a portion of the container bottom is curved or dome-shaped. An end of the outlet duct, especially one end located in the filling space, can not be above (equal height or below) the apex or edge of an opening of the tank bottom. The vertex determination described above is also applicable to this container. The embodiment again has the advantage of reduced removal of foam from the filling space. The pressure in the pressure chamber can be at least 1 bar higher than in the filling chamber.

Preferably, the pressure in the pressure chamber is at least 2 bar, more preferably at least 3 bar, greater than the pressure in the Befüllraum.

If the pressure in the pressure chamber is greater than in the filling space, a relatively large

Quantity of propellant gas (high pressure) be stored in the pressure chamber and at the same time be the pressure in the filling space (relatively) lower, resulting in a better and more stable over different filling levels of the filling space

Removal behavior leads. Any pressure valve disclosed herein may be a control valve.

The pressure chamber can be filled with a propellant gas. The propellant is preferably carbon dioxide (C0 ₂ ), nitrogen (N ₂ ), nitrous oxide (N ₂ 0) or mixtures of the gases.

The pressure in the pressure space is preferably between 5 bar (0.5 MPa) and 35 bar

(3.5 MPa), especially the pressure is between 5 bar and 30 bar, more specifically between 8 bar and 25 bar. The pressure in the pressure chamber is also determined by the volume of the pressure chamber, so that at a larger volume of the pressure chamber under

Presence of a constant amount of substance may be lower or may be higher for a larger volume of the pressure chamber, the pressure.

The pressure in the filling chamber may be smaller than the pressure in the pressure chamber. Specifically, the pressure in the filling space can be between 1.2 bar (0.12 MPa) and 7 bar (0.7 MPa), more specifically between 1.5 bar and 6 bar, more particularly between 1.7 and 5 bar.

The volume of the pressure space may be between 0.1 L and 5 L, especially between 0.1 L and 3 L, more specifically between 0.5 L and 2.5 L, more particularly between 0.5 L and 1.5 L.

The volume of the filling space can be between 1 L and 25 L, especially between 2 L and 20 L. The filling space preferably has a volume which allows 2 L, 3 L, 5 L or 20 L of a liquid to be accommodated so that a gas-filled area of at least 0.05 L preferably exists in addition to the liquid in the filling space.

The pressure chamber can not include filing. A sizing agent is a component that is typically in solid state at ambient conditions and allows for the uptake of a substance amount of a substance. In this case, the pressure increase, in the space in which the filament is introduced, falls lower by the introduction of the substance, compared with the introduction of the same amount of substance in the same space without filament. The vapor pressure of the propellant gas or propellant gas mixture may be above the pressure of the pressure space, especially down to a temperature of -5 ° C. Accordingly, the propellant gas or the propellant gas mixture in the pressure chamber is for the most part in gaseous form, it being known to the person skilled in the art that even in this state a (very) small proportion of the propellant gas or the propellant gas mixture is present in liquid form (cf.

Surface energy or surface tension effects on strongly curved

Surfaces).

The presence of the propellant gas, mostly as a gas, improves the safety of the container from a considerable amount of liquid

LPG filling. If the propellant gas is substantially liquid at room temperature and below, heating the container (eg, when a consumer exposes the container to prolonged periods of intense solar radiation and / or high temperature) can result in phase transition from the liquid to the gaseous phase , which can increase the pressure considerably. This can lead to failure of the pressure chamber wall material. In addition, such a phase change pressure increase is problematic when a consumer first uses the container.

In the context of the invention allows the arrangement of the pressure valve in the container, if it should come to a very high pressure rise in the pressure chamber, that the pressure over the pressure chamber floor, possibly with destruction of the pressure valve, is discharged to the environment. This is advantageous over the prior art because in prior art containers, most of the container will burst when a critical pressure is exceeded.

Preferably, the container bottom is curved or dome-shaped. Specifically, the container bottom is curved in the z-direction to the container interior.

In particular, the vertex or the edge of an opening of the container bottom in the (z) direction of the container interior.

By a curvature of the container bottom can be a space of only a total of two components (here tank bottom and pressure chamber floor) form. In addition, there is an improved force absorption of the curved component relative to a non-curved component. Furthermore, an inwardly curved container bottom allows improved drainability of a filled container, since at constant residual filling in the edge region of the container over a non-curved container bottom results in an increased filling height (smaller cross-sectional area). The pressure chamber floor can be configured substantially planar, especially the pressure chamber floor is formed substantially parallel to the container top. The "essentially" allows a deviation from the flatness and parallelism by 10%.

The pressure chamber floor can be designed so that the pressure chamber floor does not contact the planar surface when the container is standing upright on a level surface.

Preferably, the container bottom, the pressure chamber bottom, the container wall and / or the container top made of metal sheet with wall thickness (s) of less than 1.00 mm. In particular, the wall thickness is less than 0.80 mm, more preferably less than 0.55 mm.

A small material thickness (wall thickness) of the components of the container results in a particularly economical use as a disposable container. A disposable container is typically disposed of by a consumer after use and is not reused.

Each container disclosed herein may be a keg, in particular a beer keg.

A pressure valve, in particular a pressure regulating valve, for regulating the pressure in a container comprises a pressure valve sleeve, a first pressure valve insert and a second pressure valve insert. The pressure valve sleeve is designed such that the first pressure valve insert and the second pressure valve insert can be inserted or inserted into the pressure valve sleeve. The first and the second pressure valve insert are at least partially disposed within the pressure valve sleeve. The

Pressure valve sleeve comprises a metallic material, in particular is the

Pressure valve sleeve at least partially made of metal, and the first and second pressure valve insert include a Kunstoffoff- Werkst off, especially the first and the second pressure valve insert at least partially made of plastic.

If the pressure valve is inserted into a container, wherein the pressure valve is connected to a container bottom and to a pressure chamber bottom, the force resulting from an overpressure in the pressure chamber (as described above) can be absorbed by the container bottom and the pressure chamber bottom primarily by the metal-comprising pressure valve sleeve become.

The pressure valve sleeve may have lateral and axial openings and / or channels. The pressure valve sleeve is not intended as a pipe without radial openings or channels understand. The wall or one of the walls of the pressure valve sleeve can be configured, for example, as a grid.

The pressure valve sleeve of the pressure valve may be made of metal and the first and / or the second pressure valve insert made of plastic.

The pressure valve sleeve may have at one axial end a projection which is designed so that the projection can overlap or embrace an opening of a container bottom. The projection can be fully formed.

The pressure valve sleeve can be configured at an axial end so that the end can be connected to a pressure chamber floor. The compound can be specifically provided via a double fold.

The first pressure valve insert may have a first and a second channel. Through the channels, a space located outside the pressure valve (pressure chamber) with another lying outside the pressure valve chamber (Befüllraum)

be connected in fluid communication when the pressure valve is open.

The first pressure valve insert may have a groove. Specifically, the groove is completely circumferential. The groove is configured with a lateral opening of the

Pressure valve sleeve to act together.

The first pressure valve insert of the pressure valve may comprise at least one sealing element. Preferably, the first pressure valve insert comprises a plurality, particularly preferably three, sealing elements. The sealing element acts between the first

Pressure valve insert and the pressure valve sleeve in the axial direction, which improves the connection of the two elements.

The first pressure valve insert can positively or non-positively with the

Pressure valve sleeve to be connected. Specifically, the first pressure valve insert is frictionally held against the pressure valve sleeve, by an excess of the first

Pressure valve insert opposite the pressure valve sleeve.

The second pressure valve insert may comprise a membrane. Specifically, the membrane comprises a landing element. Preferably, the membrane is made of a flexible plastic.

The second pressure valve insert may comprise a tensioning element, in particular a spring. The clamping element can between a membrane and a

Be arranged closing element. The second pressure valve insert may have a groove. The groove can be designed on the inside. In the groove can engage a projection of a closing element.

The closing element can be inserted into the second pressure valve insert. Specifically, the closing element can be pushed into the second pressure valve insert so far that a projection of the closing element engages in a groove of the second pressure valve insert.

The second pressure valve insert of the pressure valve may be positively or non-positively connected to the first pressure valve insert. Specifically, the second one

Pressure valve insert bolted to the first pressure valve insert.

The second pressure valve insert of the pressure valve may also be positively or non-positively connected to the pressure valve sleeve. Especially by an excess of the second pressure valve insert against the pressure valve sleeve.

The pressure valve may include a third pressure valve insert. The third

Pressure valve insert may include a valve.

The valve of the third pressure valve insert may be a poppet valve.

The third pressure valve insert of the pressure valve may include an opening. The opening in the opened state of the valve, a pressure chamber, which is outside the pressure valve, via a second channel in the first pressure valve insert and an opening of the pressure valve sleeve with a Befüllraum, which is outside the pressure valve, via a first channel in the first pressure valve insert connect fluid communicating.

The third pressure valve insert may comprise a tensioning element. The clamping element can press a sealing plate in the direction of a valve seat.

A membrane of the second pressure valve insert may be coupled to a valve, in particular mechanically coupled. Specifically, the membrane is coupled to a valve in a third pressure valve insert, in particular mechanically coupled.

The first pressure valve insert and the second pressure valve insert can each be arranged in the pressure valve sleeve to at least 50% of the total height of the pressure valve insert, preferably at least 70% of the total height of the pressure valve insert, more preferably at least 90% of the total height of the pressure valve insert.

A pressure valve for a container may include a pressure valve body, a first

Pressure valve chamber, a second pressure valve chamber and a third pressure valve chamber include. The first pressure valve space is formed by the pressure valve body and a first movable piston. The second pressure valve space is through the

Pressure valve body, the first movable piston and a second movable piston limited. The second pressure valve chamber is connected in a fluid-communicating manner via a filling space channel to a first space located outside the pressure valve. The third pressure valve chamber is delimited by the pressure valve body and the second piston and is fluid-communicatively connected via a first pressure chamber passage to a second space located outside the pressure valve. The first and second movable piston is preferably guided in their respective movement and, in particular, a movement substantially only in the axial direction (z-direction) is possible. In this case, the "essentially" refers to the fact that, in the case of use according to the invention, the axial mobility is the main mobility. The first space outside the pressure valve may be any space outside the pressure valve, specifically it is a fill space. Likewise, the second space outside the pressure valve may be any space outside the pressure valve. This space is preferably the pressure chamber. For fluid communication, reference is made to the comments above.

The pressure valve body may comprise a second pressure chamber passage which is closed in a fluid-tight manner at one end of the second pressure chamber passage by the first piston in the closed state of the pressure valve and at another end opposite to the second, outside of the pressure valve chamber is open.

Preferably, the second pressure valve chamber and the second, outside the pressure valve chamber lying in the open state of the pressure valve by the second

Pressure chamber channel fluidkommunizierend connected. Specifically, in the open state of the pressure valve, the first space located outside the pressure valve and the second space outside the pressure valve are connected in a fluid-communicating manner.

The pressure valve may include a seat valve. In the sealing state of the seat valve, the pressure valve is closed and in the non-sealing state of the seat valve, the pressure valve is opened.

Preferably, the seat valve comprises a sealing element, wherein the sealing element formed by a portion of the second piston and the sealing element can bear fluid-tightly against a portion of the pressure valve body. Specifically, the sealing element is conical, spherical or plate-shaped, so that a conical seat valve, ball seat valve or plate seat valve results. The first movable piston may be mechanically coupled to the second movable piston as soon as the pressure in the first pressure-valve space is so great that the first piston moves toward and contacts the second piston based on the pressure in the z-direction. Due to the pressure in the first pressure valve chamber, a force acts on the first piston as a function of the area of the first piston to which the pressure acts. By overcoming at least one frictional force and possibly a weight force, the first piston can move.

Preferably, the first piston comprises a receiving element, whereby the first piston and the second piston can be coupled.

The first piston may comprise a seal. Preferably, the seal is a molded seal or O-ring. Specifically, the molded seal can be made by a 2-component production (multi-component injection molding).

Between the pressure valve body and the second piston, a clamping element can be clamped. Preferably, the clamping element is a spring made of metal or plastic. The tensioning member is provided to hold the second piston in a fixed position relative to the pressure valve body, even when no additional forces act on the elements of the pressure valve.

Preferably, the clamping element is arranged in the third pressure valve chamber.

The first piston and / or the second piston may not have a channel.

Preferably, at least one of the first and second pistons is configured in full. The first and / or the second piston may be formed in one piece.

The pressure valve body may have a fluid-tight closable pressure valve inlet, through which a substance in the first pressure valve chamber can be introduced. The substance is preferably a gas and especially a propellant gas. Equally possible is the introduction of a substance in liquid or solid form, wherein the phase transformation into the gaseous form takes place later in the first pressure valve chamber. For example, carbon dioxide can be introduced in the form of dry ice or introduced liquid, wherein in the first pressure valve chamber sublimation or evaporation of not

gaseous carbon dioxide happens.

A described container may comprise a described pressure valve,

In particular, the pressure valve can be used on the bottom side in the container.

The filling space of a container can be filled with a liquid. Preferably, the liquid is beer. The described container can be used as a portable drum, the drum having a filling volume of not more than 20 L, preferably not more than 10 L or 5 L. Specifically, the volume is greater than 1 L and in particular greater than 2 L.

The pressure in the filling space of a described container can be regulated (automatically) in one method. The filling space is at least partially with a

Liquid filled and the pressure chamber is at least partially filled with a propellant gas. The container includes an outlet conduit with a valve. When the valve is open, the outlet line connects the filling chamber and a container

fluidly communicating surrounding space. Within the process, the valve is actuated, whereby a portion of the liquid in the filling space in the - surrounding the container - space is drained and according to the volume of the drained liquid, the pressure in the filling chamber decreases. The pressure valve opens at

Signing a threshold value of the pressure in the filling space, which causes a portion of the propellant gas volume in the pressure chamber flows into the filling space. at

Exceeding a second threshold value of the pressure in the filling chamber closes the pressure valve and does not allow any further flow of propellant gas from the pressure chamber into the filling space. The first and second thresholds result from the

Characteristics of the container and the pressure valve and are explained in more detail later with reference to an embodiment.

The method may include a previously described pressure valve.

A metallic container may store a pressurized liquid, preferably beer. The container comprises a filling space for the liquid and a pressure space for a propellant gas. The filling space is formed between an upwardly curved container bottom and a container top. The filling space absorbs the liquid and a first overpressure relative to the exterior. Of the

Pressure chamber is formed between the container bottom and a pressure chamber bottom located further down (in an upright container). The pressure chamber receives a second overpressure of a propellant gas. A first recess is provided in the container bottom and a second recess is provided in the pressure chamber bottom, the recesses being axially aligned to receive a sealing pressure valve closing and sealing both recesses.

A container hollow bottom can be used for a container. Of the

Container hollow bottom comprises a first bottom and a second bottom and a pressure valve. Both the first floor and the second floor has one

Recess on. The first floor is connected to the second floor. The

Pressure valve is connected to the first floor and the second floor. This is formed a fluid-tight pressure chamber. In the open state of the pressure valve is the pressure chamber with a space surrounding the container hollow bottom,

connected in a fluid-communicating manner.

In the closed state of the pressure valve, the pressure chamber is separated from a space surrounding the container hollow bottom, fluid-tight.

Preferably, the first floor and / or the second floor made of steel, iron or aluminum. The pressure valve is preferably made of plastic, especially of a thermoplastic, more preferably the pressure valve consists of two or three different thermoplastics.

Specifically, both the container bottom, the container wall, the container top and the pressure chamber floor can be made of tinplate.

The first bottom of the container hollow bottom may have a domed or dome-like shape.

The pressure valve of the container hollow bottom can each engage in the recess of the first bottom and the second bottom.

Preferably, the pressure valve of the container hollow bottom at the upper and lower ends (axially) in each case at least one projection. The protrusion at the upper end contacts the outer surface of the first floor and the protrusion at the lower end contacts the outer surface of the second floor.

Preferably there is a pressure PD ₃ in the pressure space above the atmospheric pressure. This overpressure may be caused by a propellant gas, in particular

Carbon dioxide, nitrogen, nitrous oxide or mixtures of gases.

The first bottom of the container bottom can be the second bottom of the

Container hollow bottom overlap, preferably, the second bottom is axially completely enclosed by the first bottom. In addition, the edge region of the first floor can be configured such that the container hollow floor can be connected to a container via the first floor. This connection can be designed in particular by a crimp.

The pressure valve may be connected in the container hollow bottom to the first bottom and the second bottom so that forces acting on the first bottom and the second bottom at an overpressure in the pressure chamber, at least partially from or can be absorbed by the pressure valve. This results in an improved stability of the container hollow bottom at an overpressure in the pressure chamber.

A modular system for producing a container bottom comprises a first bottom, a second bottom and a pressure valve. The first floor has one

Recess and a circumferential bead on. The second floor has a

Recess on. The pressure valve has a projection at its (axial) upper end and at its (axial) lower end. The first floor and the second floor are connectable via the bead of the first floor. The pressure valve may be connected to the first bottom and the second bottom such that the protrusion at the top (axial) end of the pressure valve contacts the top of the first bottom and the protrusion at the bottom (axial) end of the pressure valve contacts the bottom of the second bottom ,

The first bottom of the modular system may have a domed or dome-like shape.

The pressure valve of the modular system can engage in each of a recess of the first floor and the second floor.

By the combination (connection) of the components of the modular system, namely the first bottom, the second bottom and the pressure valve, a fluid-tight pressure chamber can be formed when the pressure valve is closed.

A container with a filling chamber, a pressure chamber and a pressure valve can be filled in one method. The filling space is formed by a container bottom, a container wall and a container top. In the Befüllraum there is a first pressure pe. ₄ The pressure chamber is through the container bottom and a

Pressure chamber floor formed. In the pressure space there is a second pressure PD ₄ , the pressure being above the atmospheric pressure. In particular, the second pressure PD ₄ is more than 3 bar. The pressure valve is connected to the container bottom and the pressure chamber floor. The pressure valve has a pressure valve inlet. The container has a Befüllraumeinlass. Within the process, a liquid is filled into the filling space via the Befüllraumeinlass. A gas is introduced into the pressure valve via the pressure valve inlet. The pressure valve inlet is closed.

The method steps are preferably carried out in the following sequence: filling the liquid into the filling space via the filling chamber inlet, filling a Gas in the pressure valve via the pressure valve inlet and closing the pressure valve inlet.

A cover can be connected to the pressure valve via at least one web. To close the pressure valve inlet, the cover on the

Pressure valve inlet are applied, whereby the pressure valve inlet is closed. Preferably, the cover is applied cohesively to the pressure valve inlet.

The cover may be friction welded to the pressure valve or applied to the pressure valve inlet, particularly by ultrasonic welding.

By filling a gas in the pressure valve via the pressure valve inlet, a first piston of the pressure valve can be moved until the first piston contacts or abuts a second piston of the pressure valve.

Preferably, the gas filled in the pressure valve is carbon dioxide, nitrogen, nitrous oxide or a mixture of these gases.

One of the pressure valves disclosed herein may be used in a container. The container comprises a pressure chamber and a filling space. The filling space is formed by a container bottom and a container top and in the Befüllraum there is a first pressure (Befüllraumdruck) PBS. The pressure chamber is through the

Container bottom and a pressure chamber bottom formed and in the pressure chamber, there is a second pressure (pressure chamber pressure) PDS. The pressure valve is connected to the container bottom and to the pressure chamber bottom. In the open state of the pressure valve, the filling chamber and the pressure chamber are connected in a manner that communicates with the fluid, and in the closed state of the pressure valve, the filling chamber and the pressure chamber are fluid-tightly separated from one another.

A projection of the pressure valve sleeve may contact the upper side of the container bottom and the pressure valve sleeve may be connected to the pressure chamber bottom. Specifically, the pressure valve sleeve via a fold, preferably a double fold, connected to the pressure chamber floor.

The pressure chamber floor can be welded to the container bottom in the edge region.

The container may comprise an outlet line The container bottom may be curved or dome-shaped. The distance between an end of the outlet line located in the filling space and a point on the pressure chamber bottom, especially the point with the smallest distance to the end of the filling space lying in the filling space Outlet line may be less than or smaller than the distance between the end of the discharge line lying in the filling space and the vertex or the edge of the opening of the container bottom.

Through the container, a z-axis may be formed, wherein the z-axis of the

Pressure chamber floor extends in the direction of the container top. One in the filling room

lying end of the outlet line may, with respect to the z-axis, not above the pressure valve.

In a container with z-axis, extending from the pressure chamber floor in the direction of

Tank top extends, and with a dome-shaped or domed

Container bottom, one end of the outlet, which is located in the filling, not

lie above the vertex or the edge of an opening of the container bottom.

In a container, the container bottom can bulge in the direction of

Have container interior, which results in the edge region of the lower region of the Befüllraums an area with a small area This allows residual amounts

Liquid in the filling space of an outlet line can be reached well and only a (very) small amount of liquid can not be removed.

One of the pressure valves disclosed herein may be used in a container having a liquid filled filling space. Specifically, the liquid is beer.

One of the pressure valves disclosed herein may be used in a portable drum, the portable drum as a container, wherein the portable drum is a filling volume

between 1 L and 20 L, preferably between 2 L and 10 L, more preferably between 4 L and 10 L has.

The embodiments of the inventions are illustrated by way of example and not disclosed in a manner to convey or read in on the limitations of the figures in the claims. These examples should also be read and understood as examples, if not everywhere and at any place "eg", "in particular" or "for example" stands. The presentation of an execution is also not read so that there is no other or other possibilities are excluded, if only one example is presented. These specifications are to be read throughout the following description.

FIG. 1 shows a schematic representation of a container 1 in FIG

Cylinder coordinates z-r with a filling space 40, a

Pressure chamber 6 and a pressure valve 10th FIG. 2 shows a sectional view through the bottom region of a container 1 in the z-direction, with a detailed representation of a pressure-side valve 10 that can be used on the bottom side and attached to the bottom. FIG. 3 shows a container bottom region 1a without bottom-side

Pressure valve 10 in section in the z-direction.

Figure 4 shows a bottom side to be used pressure valve 10 in

Section in the z-direction, wherein a first piston 12 and a second piston 13 are coupled. FIG. 5 shows another bottom-side usable pressure valve

10a in section in the z-direction, wherein the first piston 12 and the second piston 13 are not coupled.

FIG. 6 shows a container hollow bottom 200.

FIG. 7 shows a container 301 to be filled. FIG. 8 shows a section of a filled container 301

Filling a gas in the pressure valve 310.

FIG. 9 shows a detail of a filled container 301

Filling a gas in the pressure valve 310.

FIG. 10 shows a pressure valve 410 before a closing element

480 is engaged.

FIG. 11 shows a pressure valve 410 after a closing element

480 is engaged.

Figure 12a shows a step during the connection of a

Pressure valve sleeve 444 with a container bottom 402 and a pressure chamber bottom 405th

FIG. 12b shows a step during the connection of a

Pressure valve sleeve 444 with a pressure chamber bottom 405th

Figure 12c shows a step during the connection of a

Pressure valve sleeve 444 with a pressure chamber bottom 405th An embodiment of a container 1 is shown schematically in FIG. In the upper region of the container 1, a filling space 40 is arranged. The filling space 40 is partially filled with a liquid and the uppermost region of the filling space 40 is filled with a gas. The filling chamber 40 is formed by a container wall 7, a container top 8 and a container bottom 2. In the lower part of the container 1 is a pressure chamber 6, which is formed by the container bottom 2 and the pressure chamber bottom 5. A pressure valve 10 connects the container bottom 2 and the pressure chamber bottom 5 and extends through the pressure chamber 6. In the filling chamber 40 there is a pressure pß and in the pressure chamber 6 there is a pressure PD. The pressure pp in the pressure chamber 6 is greater than the pressure pe in the filling space 40th

In this filled state of the container 1 results from the liquid in the

Befüllraum 40 a dependence of the prevailing pressure of the axial height in the filling space 40. The pressure pe is the pressure to be understood on the

Filling space side of the pressure valve acts. In the embodiment of Figure 1 corresponds to the pressure pß the pressure in the gas-filled region of the Befüllraums 40 plus resulting from the liquid column pressure component up to the height at which the pressure pe on the filling chamber side acts on the pressure valve 10.

The pressure pe in the filling chamber 40 is greater than the ambient pressure of the container 1, so that the liquid in the filling chamber 40 flows out of an outlet line 30 by opening a valve 32. Due to the outflow of the liquid in the filling space 40, the pressure pe decreases in accordance with the volume of liquid removed. at

Falling below a certain pressure (discussed in detail below) opens the

Pressure valve 10 and a gas flows from the pressure chamber 6 into the filling chamber 40 until a certain pressure in the filling chamber 40 is reached. Then the pressure valve 10 closes and no further gas can flow from the pressure chamber 6 into the filling space 40. This ensures that the pressure p.sub.s in the filling space 40 is always sufficiently high to allow the liquid content of the filling space 40 to escape by opening the valve 32 via the outlet line 30.

Due to the curvature of the container bottom 2 in the direction of the container interior results in the edge region of the lower region of the Befüllraums 40 an area with a small area (bottom area la), so that residual amounts of liquid in the filling space 40 through the outlet 30 are easily accessible and only one (very) small amount of liquid is not removable.

The end of the outlet line 30, which lies in the filling space 40, protrudes in the z-direction to below the top of the pressure valve 10 in the bottom portion la. This arrangement serves to prevent possible foaming by a liquid in the filling space 40, during or after a gas flows from the pressure space 6 into the filling space 40, to distance from this end of the outlet line 30, so that a small amount of foam and a large proportion of non-foamed liquid can be removed via the outlet line 30. The end of the outlet line 30 located in the filling space 40 also lies below the apex of the curved container bottom 2 in the z-direction and below the edge of the opening in the container bottom 2. The pressure valve 10 engages in the opening of the container bottom 2.

In addition, the distance between the end of the outlet conduit 30 in the

Filling space 40 and the pressure chamber bottom 5 less than the distance between the end of the outlet conduit 30 in the filling space 40 and the vertex of the

Container bottom 2 and the edge of the opening of the container bottom 2, through which the pressure valve 10 engages.

The container bottom 2 is arched or dome-shaped and protrudes into the container interior in the positive z-direction. In this case, the vertex and the edge of the opening of the container bottom 2 projects in the direction of the interior of the container first

On the container top 8 a Befüllraum inlet 45 is arranged, via which the filling chamber 40 can be filled with a liquid and, if appropriate, a first overpressure can be applied.

FIG. 2 shows a sectional view through the bottom region 1a of a container 1 with a detailed illustration of a pressure valve 10. The container bottom region 1a shows a lower region of the filling space 40, the pressure chamber 6 and the pressure valve 10. The container bottom 2 is connected to the container wall 7 via a fold connected. The pressure chamber floor 5 is connected to the container bottom 2. In recesses of the container bottom 2 and the pressure chamber floor 5 engages the pressure valve 10. In this case, the pressure valve 10 is configured so that from the pressure chamber 6 outwardly directed forces acting on the container bottom 2 and the pressure chamber bottom 6 are received by the pressure valve 10, at least partially.

FIG. 3 shows a container bottom region la in section in the z direction, similar to the embodiment in FIG. 2, but without the pressure valve 10. The container bottom 2 has a recess 2a and the pressure chamber bottom 5 has a recess 5a. In this embodiment, the recesses 2a, 5a are axial (z-direction) aligned along the axis A.

To introduce a pressure valve 10 in the recesses 2a, 5a as it

For example, as shown in Figure 2, the pressure valve 10 is typically in two parts designed. Such a two-part design of the pressure valve can be connected, for example, via a screw to a one-piece pressure valve 10, wherein a part of the pressure valve 10 has an external thread and another part of the pressure valve 10 has an internal thread that to the

External thread fits. The pressure valve 10 can be, for example, by inserting a part of the pressure valve in one of the two recesses 2a, 5a, insert the second part of the pressure valve 10 in the remaining of the two recesses 2a, 5a and screw the two pressure valve parts in the pressure chamber 6 introduce. As a result, the recesses 2a, 5a sealed sealed and the pressure valve 10 is connected to the container bottom 2 and the pressure chamber floor 5.

FIG. 4 shows an embodiment of a pressure valve 10 in section in the z-direction, which can be inserted on the bottom side into a container 1, as described above. The pressure valve 10 comprises a first pressure valve chamber 15 in which a pressure pv prevails. The first pressure valve chamber 15 is limited by a

Pressure valve body 11 and a first piston 12. In the pressure valve body 11, a pressure valve inlet 24 is arranged, via which the first pressure valve chamber 15 can be filled with a gas. The pressure valve inlet 24 is fluid-tight by a cover 25 lockable. Furthermore, the pressure valve comprises a second

Pressure valve chamber 16 which is limited by the pressure valve body 11, the first piston 12 and a second piston 13. The second pressure valve chamber 16 is connected via a Befüllraum channel 22 with a fluid communicating space, which is outside of the pressure valve 10. The pressure valve 10 also includes a third

Pressure valve chamber 17 which is limited by the second piston 13 and the

Pressure valve body 11. About a first pressure chamber channel is the third

Pressure valve chamber 17 fluidkommunizierend with a space outside the pressure valve

10 connected.

In the third pressure valve chamber 17 is a clamping element 19 between the

Clamped pressure valve body 11 and the second piston 13. In this

Embodiment, the clamping element 19 is a spring. By the clamping element 19 is a conical portion of the second piston 13 in a pressure in the valve body

11 formed counterstructure, so that the conical portion of the second piston 13 acts as a cone seat valve. In this state, with on the counter-structure of the pressure valve body 11 sealingly adjacent conical portion of the second piston 13, the pressure valve 10 is closed. In the closed state of the

Pressure valve 10, the space that is outside the Befüllraum channel 22, from the space that is outside of the first pressure chamber channel 20, fluid-tight manner separated. At the lower and at the upper end of the pressure valve 10, a projection 28a, 28b is arranged in each case. The projections 28 a, 28 b protrude radially (r-direction) beyond the radial extent of the pressure valve body 10. These projections 28a, 28b improve the fit of the pressure valve 10 when the pressure valve 10 is inserted into the recesses 2a, 5a of the container bottom 2 and the pressure chamber bottom 5 (see Figures 2 and 3). At the respective sides of the projections 28a, 28b pointing to the pressure valve center and at a respective axial section of the pressure valve body 11, sealing elements 27a, 27b are arranged. When the pressure valve 10 is introduced into the recesses 2a, 5a of the container bottom 2 and the pressure chamber bottom 5, the sealing elements 27a, 27b are correspondingly on the top of the container bottom 2 and on the underside of the pressure chamber bottom 5. This ensures better tightness.

On the first piston 12, two seals 14a, 14b are arranged. In this

Embodiment, the seals 14a, 14b designed as O-rings, as well as the seals 14a, 14b can be realized as molded seals. By the seals 14a, 14b, the first pressure valve chamber 15 and the second

Pressure relief valve 16 improves fluid-tightly separated from each other and cause a large part of the friction force in a movement of the first piston 12th

In the state shown in Figure 4, a gas has been introduced into the first pressure valve chamber 15, so that a sufficiently large pressure pv in the first

Pressure valve chamber 15 prevails to the frictional force between the first piston 12 and the seals 14 a, 15 b and the pressure valve body 11 and the

To overcome gravitational force. As a result, the first piston 12 has moved so far in the positive z-direction until the receiving element 18 contacts the end face of the second piston 13.

In the pressure valve 10, there is an equilibrium of forces. On the first piston 12 acts in the positive z-direction, a force resulting from the pressure pv in the first

Pressure valve chamber 15 in conjunction with the surface of the first piston 12, at which the pressure pv is applied. In addition, a force acts in the positive z-direction, resulting from the pressure in the space outside the Befüllraum-channel 22, the axially acting on the conical portion of the second piston 13 abuts. In the negative z-direction, a force acts on the first piston 12, which results from the pressure outside the Befüllraum channel 22, the front side of the first piston 12 is applied. Furthermore, in the negative z-direction, a force which is exerted by the tensioning element 19 on the second piston 13 and the gravitational forces of the first and second pistons 12, 13. In negative z-direction also acts a force resulting from the pressure outside the first pressure chamber channel 20 results, as far as the pressure is applied to the upper end side of the second piston 13.

When the pressure valve 10 is introduced into the container bottom of a container 1, as shown for example in Figures 1 and 2, the pressure corresponds to outside of

Befüllraum channel 22 the pressure PB of the filling space 40 and the pressure outside of the first pressure space channel 20 the pressure PD of the pressure chamber 6. If the pressure PB in the filling space 40 by removing a liquid volume, the

Force balance (as shown above) to be changed. If the decrease in pressure is sufficiently large, the first and second pistons (coupling) move in the positive z-direction and the pressure valve 10 is open. In the opened state of the pressure valve 10, a fluid exchange takes place via the second pressure chamber passage 21 until the force acting in the negative z direction on the first piston 12 is sufficiently large to move the first and second pistons 12, 13 in the negative z direction to move until the pressure valve is in the closed state. In this case, the frictional force between the first piston or the seals 14a, 14b and the pressure valve body 11 acts both in the positive and in the negative z-direction as a function of the direction of movement of the first piston 12.

This balance of forces determines the thresholds Si and S ₂ . The

Threshold values Si and S ₂ result from the geometric configuration of the pressure valve 10, especially from the surfaces on which the pressures shown act, and from the magnitude of the pressures and the clamping force of the tension element 19.

Falls below the first threshold value Si of the pressure outside the Befüllraum- channel 22, the pressure valve 10 opens by a movement of the first and second pistons 12, 13 in the positive z-direction. When the second threshold value S _{2 of} the pressure outside the first pressure chamber channel 20 is exceeded, the pressure valve 10 closes by a movement of the first and second pistons 12, 13 in the negative z direction. If the pressure valve 10 is arranged in a container 1, the pressure outside the filling space channel 22 can correspond to the pressure PB in the filling space 40 and the pressure outside the first pressure space channel 20 can correspond to the pressure PD in the pressure space 6.

FIG. 4 also shows an insert 23 which can be inserted into the pressure valve body 11. Through the opening in the pressure valve body 11 into which the insert 23 can be introduced, the clamping element 23 and the second piston 13 can be introduced into the interior of the pressure valve 10 during the production of a pressure valve 10. After installation of the insert 23 in the designated opening of the pressure valve body 11 of the insert 23 is a part of the pressure valve body 11th The pressure valve body 11 may be divided into two (not shown in Figure 4), especially so that one of the two projections 28a, 28b on a part of the two-part

Pressure valve body 11 is arranged and the other of the two projections 28 a, 28 b is arranged on the other part of the two-part pressure valve body 11. The two parts of the pressure valve body 11 may be connectable for example by a screw. In the connected state of the two parts results in a two-part pressure valve body 11th

FIG. 5 shows a pressure valve 10a, which can be inserted in a container 1 on the bottom side. The difference to the pressure valve 10 of Figure 4 is that no gas was introduced through the pressure valve inlet 24 in the pressure valve 10 a, so that the first piston 12 is not coupled to the second piston 13.

FIG. 6 shows a container hollow bottom 200. In the container hollow bottom 200, a pressure chamber 206 is formed. In the pressure chamber 206 there is a pressure PD ₃ . The pressure space 206 is fluid tight to the environment closed by a first bottom 202, a second bottom 205 and a pressure valve 210 when the pressure valve 210 is closed. When the pressure valve 210 is opened, the pressure valve 210 connects the pressure chamber 206 with the container hollow bottom 200

fluidly communicating surrounding space.

In the pressure chamber 206 may be an overpressure, which means that the pressure PD ₃ in the pressure chamber 206 is greater than the pressure of the container hollow bottom 200 surrounding space or greater than the space that the upper portion (in the positive z-direction) of the pressure valve surrounds. In the case of an overpressure in the pressure chamber 206, a gas flows from the pressure chamber 206 in the vicinity of the container hollow bottom 200 when the pressure valve 210 is opened.

The pressure valve 210 is disposed in a respective recess of the first bottom 202 and the second bottom 205. By such an arrangement of the pressure valve 210, the pressure valve 210 closes the recesses of the first bottom 202 and the second bottom 205. In this embodiment, the recesses of the first bottom 202 and the second bottom 205 are aligned in the z-direction.

The pressure valve 210 has a (fully) circumferential projection 228a at the upper portion. The projection 228a is arranged so that the outer

Surface of the first bottom 202 partially abuts the projection 228a. At the lower portion of the pressure valve 210 is another projection 228b

arranged such that the outer surface of the second bottom 205 abuts against the lower projection 228 b. As a result of this configuration, a force acting on the first bottom 202 and the second bottom 205 (in each case acting outward from the pressure chamber 206) can be partially absorbed by the pressure valve 210 (tensile stress). As a result, the material thickness of the first bottom 202 and / or the second bottom 205 can be made smaller than the material thickness of the bottoms 202, 205 without the same pressure difference between the pressure chamber 206 and the space or the spaces outside of the floors 202, 205 and the same stability Force absorption of the pressure valve 210.

In other embodiments, the protrusions 228a, 228b may each be configured with circumferential breaks. Also, the pressure valve 210 may be on the inner surfaces of the floors 202, 205 (lying in the pressure chamber 206),

For example, by gluing or welding, be arranged, whereby a force absorption by the pressure valve 210 can be realized.

The second (bottom) bottom 205 is substantially planar (less than 10% deviation from the flatness) and is disposed in a fluid-tight manner in a peripheral bead 204 of the first bottom 202. The second floor 205 may also be connected to the first floor 202 by crimping, welding or gluing. In other embodiments, the bottom floor 205 may not be planar.

The first (upper) bottom 202 is (in sections) arched. In the negative direction r, from the peripheral bead 204, the first bottom 202 is formed in the form of a spherical shell segment or hollow spherical segment with a central recess.

At the edge region 203 of the first bottom 202 is a connection point or

Junction for a cylindrical or tubular container, which is not shown in Figure 6, arranged. In the embodiment shown in FIG. 6, the edge region 203 of the first bottom 202 is configured in such a way that the container hollow bottom 200 can be connected to the rim via a border region 203 of the first bottom 202.

FIG. 6 also shows an embodiment of a container hollow bottom, which can be designed by a modular system.

A modular system includes a first bottom 202, a second bottom 205 and a pressure valve 210 as individual components. Through the individual components of the modular system, a container hollow bottom can be produced. Due to the modular design, for example, an improved transportability compared to already mounted container hollow floors can be achieved.

Figures 7, 8 and 9 show various stages during the filling of a container. The container 301 in FIG. 7 is identical to the container 1 in FIG. 1, with the difference that the filling space 340 (filling space 40 in FIG. 1) is not filled with a liquid.

The container 301 comprises a filling space 340, which is formed between a container bottom 302, a container wall 307 and a container top 308. The container top 308 comprises a filling chamber inlet 345 and the passage of an outlet conduit 330. The outlet conduit 330 comprises a valve 332 and leads inside the container Filling space 340 into the container bottom portion 301 a. In the filling space 340 there is a pressure pe ₄ .

The container 301 further comprises a pressure chamber 306, which is formed between the container bottom 302 and a pressure chamber bottom 305. The container bottom 302 and the pressure chamber bottom 305 each have a recess, to which a pressure valve 310 is arranged. In the pressure chamber 306 there is a pressure PD ₄ , wherein the pressure PD _{4 is} above the atmospheric pressure (outside of the container 301).

Such a container 301 (FIG. 7) can be connected to a filler of a liquid,

For example, be delivered to beer and filled at the bottler. For this purpose, the filler fills a liquid via the Befüllraumeinlass 345 in the filling space 340. The Befüllraumeinlass 345 is closed.

To activate the pressure valve 310, FIG. 8 shows a detailed representation of a container 301 filled with a liquid (filling space 340).

The pressure valve 310 comprises a second pressure valve space 316, which is connected in a fluid-communicating manner via a filling space channel 322 to the filling space 340. In addition, the pressure valve 310 comprises a third pressure valve chamber 317, in which a clamping element 319 is arranged, which exerts a force on a second piston 313 in the negative z-direction. The third pressure valve chamber 317 is connected via a first pressure chamber channel 320 to the pressure chamber 306 fluidkommunizierend.

Due to the overpressure in the pressure chamber 306 and by the clamping force of the clamping element 319, the second piston is in the pressure valve 310, that the pressure valve 310 is present in the closed state. Accordingly, the second pressure valve chamber 316 is not connected in a fluid-communicating manner via the second pressure chamber channel 321 to the pressure chamber 306. Only the pressure pe ₄ in the filling space 340 (sum of pressure and Pressure resulting from the liquid column) exerts a force on the second piston 313 in the positive z-direction, the forces acting in the negative z-direction on the second piston 312 being greater.

The first piston 312 is located at the bottom of the pressure valve 310. In the negative z-direction act on the first piston 312, the weight of the first piston and a force resulting from the pressure in the second pressure valve chamber 316 in connection with its engagement surface on the first piston.

To activate the pressure valve 310, a positive pressure (pressure above atmospheric pressure) may be introduced into the pressure valve 310 via a pressure valve inlet 324. In the embodiment shown in FIG. 8, a cover 325 is arranged on the pressure valve 310 in the region of the pressure valve inlet 324 via webs 326. The cover 325 serves to close the

Pressure valve inlet 324 after the introduction of an overpressure by the

Pressure valve inlet 324 in the pressure valve 310th

By introducing the overpressure, a force (corresponding to the magnitude of the overpressure and the engagement surface) is exerted on the first piston 312, which is so great that the first piston 312 moves guided in the positive z-direction. For this purpose, the weight of the first piston 312, the force resulting from the pressure in the second pressure valve chamber, and frictional forces must be overcome. The first piston 312 moves in the positive z-direction until it rests against the second piston 313 or possibly further in the positive z-direction when passing through the

Pressure valve inlet 324 introduced pressure is sufficiently high.

In Figure 9, a filled container 301 after the introduction of the positive pressure through the pressure valve inlet 324 in the pressure valve 310 and closure of the

Pressure valve inlet 324 shown.

A first pressure valve chamber 315 has been formed by the pressure introduction and this is below the first piston 312. The first piston 312 separates the second pressure valve chamber 316 from the first pressure valve chamber 315. The cover 325 closes the pressure valve inlet 324.

The closing of the pressure valve inlet 324 may be accomplished by friction welding

(cohesively) are performed. Preferably, an ultrasonic lance is applied to the cover 325. Upon activation of the lance, the cover 325 is materially connected to the pressure valve 310, and the webs 326 can thereby with the pressure valve 310 or the connection region between the cover 326 and Pressure valve 310 (cohesively) are connected and need not be removed separately.

The concerns of the first piston 312 and the second piston 313 are mechanically coupled. In addition to the forces described, the force of the first piston 312 acting on the second piston 313 in the positive z-direction (as a result of forces acting in the negative and positive z directions) also acts accordingly. The force action in the negative z-direction is reduced the first piston 312 by reducing the pressure PB ₄ in the filling 340, the first piston 312 and the second piston 313 can move in the positive z-direction, so that the filling chamber 340 is connected via the second pressure chamber channel 321 to the pressure chamber 306 fluidkommunizizierend.

In this form, the pressure valve 310 is in the open state and a propellant gas can flow from the pressure chamber 306 into the filling space 340. This happens until the force influences on the first piston 312 and the second piston 313 change in such a way that the first piston 312 and the second piston 313 move in the negative z-direction until the connection between the filling chamber 340 and the pressure chamber 306 is interrupted is. Then the pressure valve 310 is closed.

By the simple possibility of introducing a gas into the pressure valve 310 via the pressure valve inlet 324 through the filler, this can determine the type of gas introduced, for example air, carbon dioxide, nitrogen, nitrous oxide or mixtures of gases, and the pressure in the first pressure valve chamber 315th determine yourself.

To minimize unwanted diffusive processes, it may be advantageous for the gas introduced into the pressure valve 310 (first pressure valve chamber 315) via the pressure valve inlet 324 to correspond to the composition of the gas introduced in the pressure chamber 306 or with regard to the composition of the component or the component

Components deviations of not more than 20%, preferably not more than 10% exist.

In Fig. 10, a pressure valve (pressure control valve) 410 is shown inserted into a container. The pressure valve 410 includes a pressure valve sleeve 444, a first pressure valve insert 450, a second pressure valve insert 460, and a third pressure valve insert 470.

The pressure valve sleeve 444 is made of metal and is connected to a container bottom 402 and a pressure chamber bottom 405. The connection is made by the Pressure valve sleeve 444 engages through an opening in the container bottom 402 and a projection 442 a of the pressure valve sleeve 444 rests against the top of the container bottom 402. The connection of the pressure valve sleeve 444 to the pressure chamber bottom 405 is shown in Fig. 10 analogous thereto by abutment of a projection 442 b of the pressure valve sleeve 444 on an underside of the pressure chamber bottom 405. An alternative solution for the connection between pressure chamber bottom 405 and pressure valve sleeve 444 is shown in FIGS. 12a, 12b, 12c and explained in the associated description. Between the projections 442a, 442b of the pressure valve sleeve 444 and the container bottom 402 and the pressure chamber bottom 405 sealing elements 443a, 443b are arranged.

1, the pressure valve is largely located in a pressure chamber 406, which is formed by the pressure chamber bottom 405 and the container bottom 402, as already shown above analogously. The pressure space 406 may have the properties disclosed above. The pressure PDS in the pressure chamber 406 is above the ambient pressure, especially at pressure values, as already described above for pressure chambers.

Due to the overpressure in the pressure chamber 406, a force acts on the container bottom 402 and the pressure chamber bottom 405. This force can be absorbed particularly well by the metallic pressure valve sleeve 444.

In the pressure valve sleeve 444, a first pressure valve insert 450 is inserted. The first pressure valve insert 450 is frictionally arranged in the pressure valve sleeve 444. The frictional connection is given by an excess of the first pressure valve insert 450 against the dimension of the pressure valve sleeve 444. The outer diameter of the pressure valve sleeve 444 may be less than 30 mm. The inner diameter of the pressure valve sleeve 444 is reduced by twice its wall thickness. Of the

Outer diameter of the first pressure valve insert 450 may be greater than the inner diameter of the pressure valve sleeve 444 by up to 0.5 mm, preferably between 0.1 mm and 0.3 mm.

In addition to the excess of the first pressure valve insert 450, a plurality of sealing elements 451a, 451b, 451c effect the frictional connection with the

Pressure valve sleeve 444. The sealing elements can be designed in an O-ring shape.

The first pressure valve insert 450 comprises a first channel 422 (filling space channel) which connects a (second) space 416 located in the pressure valve 420 to a filling space 440 of the container. In the filling chamber 440, there is a pressure PBS, which is lower than the pressure PDS in the pressure chamber 406. The first pressure valve insert 450 comprises a second channel 420 (pressure space channel), which opens into the pressure chamber 406 via a groove 454 in the first pressure valve insert 450 and an opening 441.

Furthermore, the first pressure valve insert 450 has a projection 452 which engages over the projection 442a of the pressure valve sleeve and partially rests against the upper side of the container bottom 402. The first pressure valve body is preferably made of plastic, so that a possible corrosion effect of a liquid in the filling chamber 440 does not come into direct contact with the metallic pressure valve sleeve 444, which improves the resistance of the pressure valve 410.

Between the second space 416 and the second channel 420 is a third

Pressure valve insert 470 arranged. The third pressure valve insert 470 is positively or positively connected to the first pressure valve insert 450.

The third pressure valve insert 470 comprises an opening 477 which connects a (third) space 417 located in the third pressure valve insert 470 to the pressure space 406 via the second passage 416, so that the pressure in the third space 417 corresponds to (almost) the pressure pD5 in the pressure space 406. In the third space 417, a clamping element 473, especially a spring, is fastened via a clamping element guide 474. The

Clamping element 473 is also connected to a sealing plate 475 of a poppet valve 475, 476 and presses the sealing plate 475 in a valve seat 476th

A second pressure valve insert 460 is connected to the first pressure valve insert 450. The connection can be made non-positively or positively, with a screw or a weld, especially by

Friction welding, is preferred.

The second pressure valve insert 460 comprises a membrane 461, which preferably consists of a flexible plastic. On the membrane 461, a contact element 462 is formed as a thickened region of the membrane 461. The second pressure valve insert 460 is preferably produced by a multi-component injection molding process.

At the diaphragm 461 of the second pressure valve insert 460 is another

Clamping element 463, especially a spring arranged. The tensioning element 463 is disposed in a (first) space 415 located in the second pressure valve insert 460 and exerts a force between the diaphragm 461 and a closure element 480.

The closure element 480 is loose in Fig. 10 or only slightly hold connected to the second pressure valve insert 460. The function of the closure element 480 can best be described by considering the different states, as shown in FIGS. 10 and 11.

The closing element 480 is not firmly connected to the clamping element 462. It comprises a projection 481 and a channel 482. The closing element 480 is designed so that it can be inserted into the second pressure valve insert 460.

The second pressure valve insert 460 comprises a groove 464 and a contact surface 465. In this case, the groove 464 is configured corresponding to the projection 481 of the closure element 480. The distance between the abutment surface 465 and the groove 464 is not smaller than the distance between the protrusion 481 and the top (in the positive z direction) of the closure member 480.

About the down (in negative z direction) to the environment of the

Pressure valve 410 open pressure valve sleeve 444, the closing element 480 can be introduced, for example by means of a closing device 490 in a (fourth) space 418 in the pressure valve sleeve 444 and pushed by applying a force F in the positive z-direction in the second pressure valve insert 460 until the The projection 481 of the closure element 480 engages in the groove 464 of the second pressure valve insert 460 and, if appropriate, the upper side (in the positive z direction) of the closure element 480 on the abutment surface 465 of the second

Pressure valve insert 460 is applied.

As a result, the clamping element 463 can be tensioned, as a result of which a force is exerted on the diaphragm 461 and the diaphragm 461 moves in the positive z direction until it rests against a section of the sealing plate 475, for example through the abutment element 462. In the state of the locked Verschließelements 480, the pressure valve 410 is activated and there is an equilibrium of forces between the pressure PB5 in the filling 440, the pressure PDS in the pressure chamber 406 and the clamping elements 463, 473rd

During the displacement of the closure element 480 in the positive z-direction, an overpressure in the space 415, which may occur due to a compression of the volume in the space 415, escape through the channel 482 into the surrounding environment. The pressure in the room 415 corresponds due to the opening from the environment (almost) the ambient pressure. The opening of the space 415 with respect to the environment is further advantageous to ambient pressure fluctuations, for example, by different altitudes of places; to balance and thus minimize the influence of ambient pressure fluctuations on the control behavior. The pressure PDS in the pressure chamber acts on the contact surface of the sealing plate 475 in the negative z-direction. Likewise, one of the clamping element 473 acts on the

In the second space 416, the pressure PBS acts in the filling chamber 440 on the attack surface of the diaphragm 461 in the negative z-direction, the diaphragm 461 with the sealing plate

475 is coupled. A small or negligible force also results from the pressure PBS in the filling space 440 in the positive z-direction, acting on the sealing plate 475 due to the small or negligible attack surface of the pressure PBS on the sealing plate 475.

The clamping element 463 exerts a force in the positive z-direction on the membrane 461, which is forwarded to the sealing plate 475 because of the coupling between the membrane 461 and the sealing plate 475.

Depending on the attack surfaces of the elements described, the pressures and the clamping forces of the clamping elements, there is a pressure control in the filling 440th

If a volume is taken from the filling space 440, for example a beer tap by a consumer, the pressure PBS in the filling space 440 drops, as a result of which the corresponding force influences on the balance of force described change.

If a threshold value of the pressure PBS in the filling chamber 440 is undershot, the force influences in the positive z-direction prevail, so that the sealing plate 475 leaves the valve seat

476 is raised and the pressure chamber 406 fluidkommunizierend with the

Befüllraum 440 is connected to another threshold value of the pressure PBS in

Filling 440 is exceeded and the sealing plate 475 moves back into the valve seat 476, whereby a fluid communication between the filling chamber 440 and the pressure chamber 406 is not given (until the balance of forces is in turn changed accordingly). During fluid communication between the pressure chamber 406 and the filling chamber 440, a gas, in particular a propellant gas, flows from the pressure chamber 406 into the filling chamber 440.

Specifically, by choosing, under constant residual conditions, the clamping force of the clamping element 463 can provide different control pressures.

In FIGS. 12a, 12b, 12c, a possibility for connecting a pressure valve sleeve 444 to a container bottom 402 and a pressure chamber bottom 405 is shown.

First, the metallic pressure chamber bottom 405 with the metallic

Container bottom 405 welded, which is represented by the two arrows facing each other. The pressure valve sleeve 444 may through an opening in the container bottom 402 and are guided or plugged through an opening in the pressure chamber bottom 405, so that a projection 442 a of the pressure valve sleeve 444 at the top of

Tank bottom rests. The opposite end of the pressure valve sleeve 444 protrudes from the opening in the pressure chamber bottom 406 and abuts a projection 405 b of the pressure chamber bottom 405. The connection of the pressure valve sleeve 444 to the pressure space bottom 405 can be made via a double seam, which can be seen in the enlarged illustrations of the relevant section of FIGS. 12b and 12c (the enlarged area is shown by the circle in broken line in FIG. 10).

On the pressure chamber floor 405, a (slight) bias is applied by the pressure chamber bottom 405 is pressed in the direction of the container bottom 402. This is shown in Fig. 12a by a changed position of the pressure space bottom 405 and the projection 405b relative to the container bottom 402 as the position of the pressure space bottom 405 'and the projection 405b'. A bias voltage can improve the tightness of the connections. Between the pressure valve sleeve 444 and the pressure chamber bottom, a sealing element 443b is arranged.

A portion of the pressure valve sleeve 444 protruding beyond the projection 405b 'of the pressure space bottom 405' in the negative z-direction is bent over the projection 405b 'in the positive r-direction so that a projection 442b of the pressure valve sleeve 444 is formed. Subsequently, the bent-over projection 442b is further bent around the projection 405b ', so that the end of the projection 443b in the z-direction

is aligned. Subsequently, the portion of the pressure valve sleeve 444, which is bent around the projection 405 b 'of the pressure chamber bottom 405', by a

Force application of a force F pressed in positive and / or negative r-direction.

All of the disclosed pressure valves can be used in disclosed containers,

Container hollow floors or modular systems for producing a

Hollow tray can be used, even if they are covered by methods.

The disclosed inflation chambers and pressure chambers may be used in any of the disclosed containers, container trays, or modular systems for producing a container bottom, even if encompassed by methods.

Claims

Claims ...

A pressure valve for controlling the pressure in a container, comprising a pressure valve sleeve (444), a first pressure valve insert (450) and a second pressure valve insert (460), wherein

(A) the pressure valve sleeve (444) is designed such that the first

Pressure valve insert (450) and the second pressure valve insert (460) in the pressure valve sleeve (444) can be inserted or inserted;

(b) the first pressure valve insert (450) and the second

Pressure valve insert (460) at least partially within the

Pressure valve sleeve (444) are arranged; and

(C) the pressure valve sleeve (444) comprises a metallic material

and both the first pressure valve insert (450) and the second

Pressure valve insert (460) comprises a plastic material.

2. Pressure valve according to claim 1, wherein the pressure valve sleeve (444) consists of metal and the first pressure valve insert (450) and / or the second pressure valve insert (460) made of plastic.

3. A pressure valve according to any one of claims 1 or 2, wherein the pressure valve sleeve (444) at one axial end a projection (442 a) which is adapted to overlap or embrace an opening in a container bottom (402).

4. Pressure valve according to claim 3, wherein the pressure valve sleeve (444) at another axial end with a pressure chamber bottom (405) is connectable, in particular by a double seam.

5. Pressure relief valve according to one of claims 1 to 4, wherein the first pressure valve insert (450) has a first channel (422) and a second channel (420) through which the pressure valve - in the open state, starting from an outside of the pressure valve Pressure chamber (406) to a lying outside the pressure valve filling chamber (440) - can be flowed through.

6. Pressure valve according to one of claims 1 to 5, wherein the first pressure valve insert (450) has a groove (454), in particular a completely circumferential groove (454), which is formed with a lateral opening (441) of the pressure valve sleeve ( 444) to act together.

7. Pressure relief valve according to one of claims 1 to 6, wherein the first pressure valve insert (450) at least one sealing element (451 a, 451 b, 451 c), in particular a plurality of sealing elements (451 a, 451 b, 451 c), comprising between the first

Pressure valve insert (450) and the pressure valve sleeve (444) act in the axial direction.

8. Pressure valve according to one of claims 1 to 7, wherein the first pressure valve insert (450) is positively or non-positively connected to the pressure valve sleeve (444), in particular the first pressure valve insert (450) non-positively by an excess of the first pressure valve insert (450) relative to the pressure valve sleeve (444) is held in the pressure valve sleeve (444).

9. Pressure valve according to one of claims 1 to 8, wherein the second pressure valve insert (460) comprises a membrane (461), in particular with a contact element (462).

10. A pressure valve according to any one of claims 1 to 9, wherein the second pressure valve insert (460) comprises a clamping element (463) which is arranged between a membrane (461) and a closing element (480).

11. A pressure relief valve according to any one of claims 1 to 10, wherein the second pressure valve insert (460) comprises an internal groove (464) to a projection (481) of a

Locking element (480) intervene.

12. Pressure valve according to one of claims 10 or 11, wherein the closing element (480) in the second pressure valve insert (460) can be inserted, in particular so far inserted, that a projection (480) of the closing element (480) in a groove (464) of the second pressure valve insert (460) engages.

13. Pressure valve according to one of claims 1 to 12, wherein the second pressure valve insert (460) with the first pressure valve insert (450) is positively connected or non-positively connected, in particular screwed.

14. A pressure valve according to any one of claims 1 to 13, wherein the pressure valve comprises a third pressure valve insert (470), wherein the third pressure valve insert (470) comprises a valve (475, 476).

15. A pressure valve according to claim 14, wherein the valve (475, 476) is a poppet valve.

16. A pressure valve according to any one of claims 14 or 15, wherein the third

Compression valve insert (470) comprises an opening (477), wherein the opening in the open state of the valve (475, 476) lying outside the pressure valve pressure chamber (406) via a second channel (420) in the first Pressure valve insert (450) and an opening (441) of the pressure valve sleeve (444) with a non-pressure chamber lying space (440) via a first channel (422) in the first pressure valve insert (450) connects in fluid communication.

17. Pressure relief valve according to one of claims 14 to 16, wherein the third pressure valve insert (470) comprises a clamping element (473) which presses a sealing plate (475) in the direction of a valve seat (476).

18. Pressure valve according to one of claims 1 to 17, wherein a membrane (461) of the

second pressure valve insert (460) with a valve (475, 476) is coupled, in particular with a in a third pressure valve insert (470) arranged valve (475, 476) is coupled.

19. Pressure valve for a container, with a pressure valve body (11), a first

Pressure valve chamber (15), a second pressure valve chamber (16) and a third pressure valve chamber (17), wherein

(a) the first pressure valve space (15) through the pressure valve body (11)

and a first movable piston (12) is formed;

(B) the second pressure valve chamber (16) through the pressure valve body (11),

the first movable piston (12) and a second

movable piston (13) is limited and over a

Befüllraumkanal (22) with a first, outside the

Pressure valve lying space fluid communicating connected;

(c) the third pressure valve space (17) through the pressure valve body (11)

and the second piston (13) is limited and via a first pressure chamber channel (20) with a second, outside the

Pressure valve lying space fluid communicating connected.

20. Pressure valve according to claim 19, wherein the pressure valve body (11) has a second

Pressure chamber passage (21), which is closed in a closed state of the pressure valve at one end by the second piston (13) fluid-tight and is open at another end opposite the second, lying outside the pressure valve chamber.

21. A pressure valve according to claim 20, wherein in the open state of the pressure valve, the second pressure valve chamber (16) and the second space located outside the pressure valve fluidkommunizierend by the second pressure chamber channel (21) are connected.

22. Pressure valve according to one of claims 19 to 21 with a seat valve, wherein the pressure valve is closed in the sealing state of the seat valve and the pressure valve is opened in non-sealing state of the seat valve.

23. A pressure valve according to claim 22, wherein the sealing element of the seat valve is formed by a portion of the second piston (13) and the sealing element fluid-tight against a portion of the pressure valve body (11) is applied, preferably

Sealing element is conical, spherical or dish-shaped.

24. Pressure valve according to one of claims 19 to 23, wherein the first movable piston (12) with the second movable piston (13) is mechanically coupled as soon as the pressure (pv) in the first pressure valve chamber (15) is so large that the moves first piston (12) based on the pressure (pv) in the z direction to the second piston (13) and the second piston (13) contacted.

25. A pressure valve according to claim 24, wherein the first piston (12) comprises a receiving element (18) through which the first piston (12) and the second piston (13) are coupled.

26. Pressure valve according to one of claims 19 to 25, wherein the first piston (12) comprises a seal, preferably at least one molded seal or an O-ring.

27. Pressure valve according to one of claims 19 to 26, wherein a clamping element (19) between the pressure valve body (11) and the second piston (13) is clamped, wherein the clamping element (19) in particular in the third pressure valve chamber (17) is arranged.

28. Pressure valve according to one of claims 19 to 27, wherein the first and / or second piston (12, 13) have no channel, in particular the first and / or second piston (12, 13) is integrally formed.

29. Pressure valve according to one of claims 19 to 28, wherein the pressure valve body (11) has a fluid-tight closable pressure valve inlet (24) through which a substance, preferably a gas, in the first pressure valve chamber (15) can be introduced.

30. Pressure valve according to one of claims 1 to 29 in a container, wherein the

Container comprises a pressure chamber (406) and a filling space (440) and wherein:

(A) the filling space (440) through a container bottom (402), a

Container wall (7) and a container top (8) is formed and in the filling chamber (440) a first pressure (PBS) prevails; (B) the pressure chamber (406) through the container bottom (402) and a pressure chamber bottom (405) is formed and in the pressure chamber (406), a second pressure (PDS) prevails;

(C) the pressure valve with the container bottom (402) and the

Pressure chamber floor (405) is connected; and

(D) the pressure valve in the open state, the filling chamber (440) and

connects the pressure chamber (406) fluidkommunizierend and the pressure valve in the closed state, the filling chamber (440) and the pressure chamber (406) fluid-tight against each other.

31. The pressure valve according to claim 30, wherein a projection (442a) of the pressure valve sleeve (444) contacts the upper side of the container bottom (402) and the pressure valve sleeve (444) is connected to the pressure chamber bottom (405), in particular via a fold.

32. Pressure valve according to one of claims 30 or 31, wherein the pressure chamber bottom (405) with the container bottom (402) is welded in the edge region.

33. Pressure valve according to one of claims 30 to 32, wherein the container a

Outlet line (30), wherein the container bottom (402) is curved or dome-shaped, and wherein the distance between an in the filling chamber (440) lying end of the outlet duct (30) and a point on the

Pressure chamber bottom (405), in particular the point with the smallest distance to the end of the outlet line (30) lying in the filling space (440), is less than the distance between the end of the outlet line (30) and the apex or in the filling space (440) the edge of a recess (2a) of the container bottom (402).

34. Pressure valve according to one of claims 30 to 32, the container with a

Outlet conduit (30), wherein a z-axis is formed by the container and the z-axis extends from the pressure chamber floor (405) in the direction of the container top (8), wherein an end of the outlet conduit (30) located in the filling space (440) with respect to the z-axis is not above the pressure valve.

35. Pressure valve according to one of claims 30 to 32, the container with a

Outlet line (30), wherein formed by the container, a z-axis and the z-axis from the pressure chamber bottom (405) in the direction of the container top (8), wherein the container bottom (402) is curved or dome-shaped and one end the outlet duct (30) has an end in the filling space (440) Outlet line (30) is not above the apex or the edge of an opening of the container bottom (402).

36. Use of a pressure valve according to one of claims 1 to 35 in one

Container with a filling space (440) which is filled with a liquid, in particular beer.

37. Use of a pressure valve according to one of claims 1 to 35 in one

portable drum as a container with a filling volume between 1 L and 20 L, preferably between 2 L and 10 L, more preferably between 4 L and 10 L.

Pressure valve according to one of claims 1 to 18, wherein the first pressure valve insert (450) and the second pressure valve insert (460) each at least 50% of the total height of the pressure valve insert (450, 460), preferably at least 70% of the total height of the pressure valve insert (450, 460 ), more preferably at least 90% of the total height of the pressure valve insert (450, 460) are arranged in the pressure valve sleeve (444).

39. Pressure valve according to one of claims 30 to 35, wherein a curvature of the

Container bottom (2) is provided in the direction of the container interior, whereby in the edge region of the lower region (la) of the filling space (40) results in a region with a small area, so that residual amounts of liquid in the filling space (40) from an outlet line (30) well can be reached and only a (very) small amount of liquid can not be removed.