TW201713892A - A multiple seal gas cylinder - Google Patents

Abstract

A connecting arrangement for a gas cylinder having a neck with a side surface and a top surface including a gas outlet comprises, - a piercing housing for receiving the neck of the gas cylinder comprising an opening, a side wall and a bottom wall - a piercing member arranged in the piercing housing for piercing the gas outlet - a collar arranged on the neck of the gas cylinder having a side surface which extends above the top surface of the gas cylinder and defines an inner space - a primary seal element arranged in the inner space forming a seal with the top surface of the gas cylinder - wherein the primary seal element is so arranged that a spacing is formed between the collar and the primary seal element wherein in that a seal support element is arranged in the piercing housing which defines a chamber having an opening in the direction of the opening of the piercing housing such that the primary seal element fills the chamber when the piercing member is received in the collar to pierce the gas outlet and a radial expansion of the primary seal element in response to forming a seal with the piercing member is restrained in this chamber by the seal support element, wherein the primary seal element and the collar are unattached to the piercing member and the seal support element.

Description

Multiple sealed gas cylinder

The present invention relates to a connection configuration for a gas cylinder having a bottle neck having a side surface and a top surface including a gas outlet, the connection configuration comprising: - a piercing casing for Receiving the bottle neck of the gas cylinder, the piercing casing comprises an opening, a side wall and a bottom wall; - a piercing member disposed in the piercing casing for piercing the gas outlet; - a neck a ring disposed on the bottle neck of the gas cylinder, the collar having a side extending over the top surface of the gas cylinder and defining an interior space; a primary sealing element disposed in the interior space Forming a seal with the top surface of the gas cylinder and providing an opening for receiving the piercing member for piercing the outlet of the gas cylinder; wherein the sealing assembly is configured such that a space is formed in The collar is between the primary seal assembly.

As is well known, a connection arrangement is used to connect the gas cylinder to a piercing housing having a piercing member therein, which is typically used in combination with an additional assembly such as a pipe, valve or the like. Typically, the gas is supplied to a gas cylinder in which the gas is contained within a cavity defined by a pierceable membrane surrounding one end of the bottle wall. Gas can be delivered from the gas cylinder by attaching the piercing member to a gas cylinder that causes the membrane to be pierced and gas to be released from the gas cylinder through the piercing member to another assembly. Therefore, a uniform dense connection configuration can be expected to prevent leakage of compressed gas.

It is well known that a gas cylinder filled with a gas can be used to treat a beverage or alcohol for the purpose of carbonation, aeration or inertization. Compressed gas cylinders can be filled with different types of gases such as carbon dioxide, oxygen, helium, nitrogen, and other gases. Today, more and more devices are needed that require such small size gas cylinders that can be carried and used at home or on the road. Such commercially available compressed gas cylinders for storing gases need to be high pressure and have a relatively low volume, so it is undesirable to have a gas in the process of connecting the gas cylinder to the piercing casing or delivery mechanism or after this connection There is any loss. Accordingly, there is a need to provide an effective seal that prevents undesired leakage of compressed gas from a gas cylinder during opening of the gas cylinder or during prolonged delivery mechanisms.

In the prior art, a collar is typically mounted to the neck of the gas cylinder, the collar extending axially above the top surface of the gas cylinder and defining an interior space and for receiving one of the piercing members to open upwardly. A sealing element is disposed in the interior space defined by the collar to form a seal between the gas outlet and the piercing member. The sealing element touches the top surface of the gas cylinder and is exposed to the opening of the collar. Thus, during pushing the piercing member toward the gas outlet and piercing the gas outlet, the sealing member can form a suitable seal to ensure that the gas does not leak under pressure.

Leakage of the compressed gas can be expected to withstand high pressure loads and at the same time have a reliable performance, especially when the gas cylinder is portable and the user causes accidents and injuries when held by hand.

SUMMARY OF THE INVENTION The object of the present invention is to provide a connection arrangement for a gas cylinder that has a tightly effective seal under pressure so that one of the gas cylinders connected to the corresponding device can be used safely and reliably.

This task is accomplished by the features of Technical Solution 1. Advantageous embodiments are described in the accompanying technical solutions.

The gas cylinder is used to contain compressed gas within a cavity defined by the wall of the bottle. The gas cylinder includes a gas outlet at its top surface. The gas outlet preferably consists of a pierceable membrane Enclosed. The gas cylinder is formed such that a neck containing one side and a top surface is provided, at which the gas outlet is obtained.

The gas cylinder is preferably provided with a small size, and the gas cylinder is designed to be portable and disposable, for example, having a total length of from about 6.0 cm to about 7.0 cm and from about 1.5 cm to about 2 cm. One of the diameters. Aspects of the invention may also be used with larger or smaller and/or differently shaped gas cylinders. As used herein, the gas cylinder generally refers to a container configured to store and release gas under pressure. The gas cylinder has a bottle neck including a top surface, an outlet and a side surface. The outlet of the gas cylinder is preferably enclosed by a frangible surface that can be opened by piercing the member, such as a sharp or non-sharp blowpipe. The neck of the gas cylinder has a diameter of from about 0.5 cm to about 1 cm and a length of from about 0.5 cm to about 2 cm, although other dimensions are also possible. The pressurized gas in the gas cylinder may be a mixture of oxygen, carbon dioxide, air, inert gas, and the like. The gas cylinder can be supplied with a pressurized gas to a user (such as supplying an inert gas to a bottle containing the liquid for storage, supplying carbon dioxide to the beverage for carbonization or preferably introducing oxygen into the wine) One of the conveyor systems is connected. The pressure ranges of such gas cylinders can range from about 100 bar to about 200 bar, and for most commercial gas cylinders having the above size and shape, the pressure is from about 150 bar to about 200. Within the scope of Ba.

A piercing housing for receiving the neck of the gas cylinder is provided, including an opening, a side wall, and a bottom wall. The piercing casing is sized to allow a bottle neck of a gas cylinder to be inserted into the piercing casing through the opening of the piercing casing and to advance a piercing member to open the gas outlet of the gas cylinder. The piercing outer casing is defined by a side wall and a bottom wall that is perpendicular to the axis of rotation of the gas cylinder when the gas cylinder is pushed into the piercing casing. The bottom wall is a plane on which the piercing member is disposed.

The piercing member can be formed to have a shaft of a piercing tip, wherein the gas is provided for directing gas from the gas cylinder to another mechanism (such as a valve or control member) after piercing the outlet of the gas cylinder. One channel.

A collar is disposed on the neck of the gas cylinder, the collar having a side extending over the top surface of the gas cylinder and defining an interior space. The collar has a lower portion and an upper portion. The lower portion engages the neck of the gas cylinder by various attachment means such as screwing, non-spinning, gluing and shrink fitting, friction fit, and the like. The upper portion extends axially above the top surface of the gas cylinder and defines an interior space having an upward opening. The interior space and the opening define a passage for receiving the piercing member. The collar also protects the gas outlet during transportation and handling.

A primary sealing element is disposed in the interior space to form a seal with the top surface of the gas cylinder, wherein the primary sealing element is configured such that a space is formed between the collar and the primary sealing element. The spacing is preferably annularly defined by the primary sealing element and the upper portion of the collar.

The primary sealing element is preferably designed as a high pressure seal to maintain a seal at pressures up to 200 bar. The primary sealing element is deformable and serves to form a suitable seal between the piercing member and the top surface of the gas cylinder that can withstand high pressure. The material of the primary sealing element preferably comprises a polyurethane, polyoxymethylene or rubber. Other materials are also permitted depending on the gas and pressure used. Thus, when the gas cylinder is pushed into the piercing casing, the piercing member passes through the passage to squeeze the primary sealing member to pierce the gas outlet of the gas cylinder. An axial seal is formed between the piercing member and the top surface of the gas cylinder by the primary sealing member. Subsequently, one of the piercing members is radially sealed by one of the primary sealing elements to be radially expanded (caused by axial compression of the primary sealing member) to maximize sealing performance.

According to the present invention, a sealing support member is disposed in the piercing housing, the sealing support member defining a chamber having an opening between the piercing member and the sealing support member in a direction of the opening of the piercing housing Causing the primary seal when the piercing member pierces the gas outlet and the primary sealing member is radially restrained from being restrained in the chamber by a seal member that forms a seal with the piercing member The component is held in the chamber Internally, wherein the primary sealing element and the collar are not attached to the piercing member and the sealing support member.

The seal support member defines the chamber and is shaped to fit to the primary seal member and the collar, particularly the upper portion of the collar, when the piercing member pierces the gas outlet in. Thus, after piercing, the primary sealing element encloses within the chamber surrounded by the upper portion of the collar. This radial expansion of the primary sealing element is caused by compressing the gas cylinder and the piercing member together, which maximizes the radial sealing properties of the piercing member. The radial expansion of the primary sealing element by the sealing support element causes the primary sealing element to more closely fill the chamber, which advantageously enhances the sealing performance of the piercing member. Preferably, the radial expansion of the primary sealing element is limited only by the sealing support element and the piercing member. In addition, since the sealing support member is covered by the upper portion of the collar during the piercing procedure to double resistance as to prevent leakage of compressed gas, an extremely tight seal is thereby formed. It is also advantageous to have such a sealing support element in the piercing casing, since only one of the appropriate counterparts (which means having a corresponding collar and a corresponding primary sealing element) can be connected to the piercing casing. . Therefore, the use of an improper gas cylinder can be avoided. Additionally, the collar protects the primary sealing element during shipping and handling. The seal support member preferably contacts the piercing member to form a seal between the contact surfaces.

The seal support member is attached to the piercing outer casing and the piercing member and is not attached to the gas cylinder and the primary sealing member. The primary sealing element is attached to the gas cylinder and is not attached to the piercing outer casing and the piercing member, so that whenever a new gas cylinder is installed, a new primary sealing element can be provided to thereby eliminate attribution Any wear and tear possibilities for repeated use.

The sealing support member preferably includes a circular wall extending axially from the piercing member and axially extending from the bottom wall of the piercing housing in the direction of the opening of the piercing housing, wherein when the gas cylinder is pushed When entering the piercing casing, the axial direction is the direction of the axis of rotation of the gas cylinder. This circular wall defines the chamber for receiving the primary sealing element. The piercing member Located in the center of the chamber. When the gas cylinder is pushed onto the piercing member, the primary sealing member fills the chamber having the piercing member in the center and forms an axial seal and a radial seal with the piercing member. The radial expansion of the primary sealing element is confined within the chamber by the circular wall and the piercing member. The circular wall is preferably taller such that the radial expansion of the primary sealing element is only constrained by the circular wall and the piercing member in the center.

Preferably, a space is provided between the sealing support member and the side wall of the piercing casing that is configurable for connection to the gas cylinder having the collar. The space is preferably annular and the width of the ring is preferably wider than the width of the upper portion of the collar on the gas cylinder such that the gas cylinder having the collar can be pushed into the thorn Wear it in the outer casing.

The seal support member and the primary seal member are respectively disposed in the piercing casing and the gas cylinder such that the seal support member can be inserted into the space between the primary seal member and the upper portion of the collar And the upper portion of the collar can be inserted into the space between the side wall of the piercing casing and the sealing support member. Thus, the sealing properties of the piercing member are significantly enhanced by inserting the walls into each other and by multiple covering the primary sealing elements.

The space between the sealing support member and the side wall of the piercing housing is preferably larger such that other connecting elements can be disposed therein. The connecting elements may have a male or a female element disposed on one of the corresponding counterparts on the collar, thus having the collar (which has the same concave element as during the piercing procedure) The plurality of connecting elements), the upper portion and the gas cylinder of the primary sealing element can be coupled to the piercing member and the piercing housing in a secure and tight manner.

Preferably, the male component and its corresponding concave component are respectively formed in the piercing casing and the collar, so that the gas cylinder and the piercing are prevented after the male component and the concave component are engaged One of the parts rotates relative to each other. Preferably, the male component and the female component respectively extend along a section of the collar axially and extend axially along the sidewall of the piercing housing Another section, one of which has one or more recesses that can be joined together, the same or the like corresponding to the shape of the other section. The contour of the segments preferably has no straight line in a direction perpendicular to the axis of rotation such that the concave portion can be oriented in position by axially pushing it into engagement with the convex portion.

Preferably, the protruding member in the piercing housing is urged axially rearward relative to the piercing member by the concave member on the collar. In addition, the male element can be in contact with one or more springs. The spring moves the male member rearwardly during axial movement of the gas cylinder to allow the gas cylinder to access the piercing member to pierce the gas outlet. When the gas cylinder is removed from the piercing member, the male member supports its movement by the compression spring to eject the gas cylinder from the piercing member. This actuation of the male member has the advantage that the piercing member will only pierce a suitable gas cylinder designed to be able to enter the piercing housing and urge the male member to contact the piercing member.

Preferably, the concave member on the collar has at least two opposite to each other and preferably has an identical shape (which may be a curve, a parabola, a part of a triangle, a symmetry or an asymmetry) Concave.

A container is provided to receive the gas cylinder and the container includes a connecting member for attachment to the piercing housing. The container is cylindrical and adapted to receive the gas cylinder. The connecting member can be one of the threads disposed at the opening of the container. A corresponding threaded portion may be provided on the outer side wall of the side wall of the piercing casing to engage the container with the piercing casing such that the gas cylinder held in the container may be fixed to the piercing casing And the interior space defined by the container. The gas cylinder can be advanced to the piercing member by screwing the container to the piercing housing, which converts a radial movement into an axial movement. The container can be of any size as long as it meets the need to receive the gas cylinder. Specifically, the container is sized to allow the gas cylinder to be easily carried by hand.

The collar preferably includes a primary sealing element on the side of the collar that is configured to form a seal between the side of the piercing casing and the collar. When piercing the reservoir This secondary sealing element is helpful when the outlet of the gas cylinder is released into the passage of the piercing member and the gas cylinder has not been tightly sealed by the primary sealing element. During this period, the secondary sealing element is particularly needed to prevent gas from being released through the gap between the sidewalls of the piercing casing and the gas cylinder and to prevent gas loss.

The secondary seal assembly is preferably designed as an O-ring in one of the grooves on the collar that is coupled to the neck of the gas cylinder. This is significantly advantageous over the sealing assembly disposed on the pierced casing, as a new seal can be provided whenever a new gas cylinder is installed so that any wear potential due to repeated use can be reduced. The O-ring sealing element is required during axial movement between the piercing casing and the gas cylinder. The seal is performed by the O-ring being deformed by engagement with the piercing shell. In addition, other sealing assemblies are also available.

Preferably, the pressurized gas in the gas cylinder is delivered to a liquid in which a pressurized gas is required for a different purpose such as oxidation, carbonization, inertization, and the like. The liquid is preferably wine and the compressed gas is preferably oxygen.

A gas cylinder having a collar is provided, and a plurality of sealing elements are disposed on the collar as previously described. The plurality of sealing elements include: the male or female concave member; the secondary sealing member; the upper portion insertable into the space between the sealing support member and the piercing housing; the primary seal An element disposed in the interior space defined by the upper portion.

The pressurized gas may contain more than 21% by volume of oxygen when measured at atmospheric pressure. The pressurized gas contains preferably more than 50% oxygen, more preferably more than 80% by volume oxygen, more preferably more than 90% by volume oxygen, and even more preferably more than 99% by volume oxygen. The pressurized gas may also be pure oxygen for industrial use.

It should be understood that any form of pressurized gas source can be used. In fact, a gas cylinder that is engaged with one of the described collars can be used with only the preferred features and it can also be replaceable or refillable.

The invention will now be described with reference to the following non-limiting examples and accompanying drawings.

Figure 1 shows a cross-sectional view of the connection configuration between the gas cylinder 1 and the piercing casing in an unconnected state. The gas cylinder 1 has a bottle neck formed by a side surface and a top surface including a gas outlet 4. The gas cylinder 1 is filled with pressurized oxygen enclosed by a pierceable membrane which can be regarded as a gas outlet 4. The gas cylinder 1 is designed to be easily carried and disposable and has a total length of from about 6.5 cm to about 7.5 cm and a diameter of from about 1.5 cm to about 2 cm. In this embodiment, the gas cylinder has a neck which has a diameter which is less than about 0.5 cm to about 1 cm smaller than the body of the gas cylinder 1. A fully filled gas cylinder having one of these dimensions has a pressure between 100 and 200 bar.

The gas cylinder 1 is housed in a container 8. The container 8 has a thread 13 at the opening corresponding to one of the threads on the side wall 6 of the piercing casing. The container 8 supplies an axial force to the gas cylinder 1 by screwing it to the piercing casing.

A collar 2 having an upper portion and a lower portion is provided. The lower portion engages the neck of the gas cylinder by means of a connection such as screwing, gluing, shrink fitting, friction fit, and the like. The upper portion extends axially above the top surface of the gas cylinder 1 and defines an interior space. A primary sealing element 3 is disposed in the interior space 12. The primary sealing element 3 surrounds the gas outlet 4 to provide a passage for the piercing member 5 and forms a seal with the top surface of the gas cylinder 1. As shown in the figures, the primary sealing element 3 is shaped in the interior space such that a space 12 is formed between the primary sealing element 3 and the upper portion of the collar 2.

A secondary sealing element 9 is disposed on the collar 2, preferably on the lower portion of the collar 2. The secondary sealing element 9 is preferably formed as one of the O-rings in one of the grooves of the collar 2 to form a seal between the collar 2 and the side wall 6 piercing the outer casing. Other sealing assemblies are also available.

The piercing housing acts as an adapter that includes one of the different counterparts that can be properly attached to the gas cylinder 1. The piercing outer casing is defined by an opening, a side wall 6, and a bottom wall. In this embodiment, the bottom wall is perpendicular to the axis of rotation of the gas cylinder 1 and a piercing member 5 is located on top of it. surface. The bottom wall can be any portion of an additional assembly (eg, valve, membrane). The piercing member 5 is preferably located in the center of the pierced casing. The piercing member 5 is formed to allow the gas outlet 4 to be significantly deformed by a blunt end or a truncated cone before the gas outlet 4 is broken.

The gas outlet 4 and/or the piercing member 5 are preferably made of a metallic material such as steel or stainless steel. The piercing member 5 has a passage in the cone that allows pressurized gas to escape from the gas cylinder 1 and enter the additional dispensing assembly via the passage. This piercing by a blunt end outlet prevents particles from separating from the outlet during piercing.

A sealing support member 7 is configured to surround the piercing member 5, which includes a circular wall defining a chamber 11. The chamber 11 has an opening for receiving the primary sealing element 3. The cross section of the chamber 11 preferably has a circular shape that is smaller than one of the pierced outer casings. The sealing support element 7 is arranged in the piercing casing such that a space is thereby provided between the sealing support element 7 and the side wall 6 piercing the casing. A male element 10 is disposed in this space. The corresponding concave portion 14 is disposed on the collar 2 . Preferably, the male member 10 can be axially urged by the female member 14 in the direction of the bottom wall. The male member 10 is formed to have a circular wall of one of the recesses, and therefore, after engaging the concave member 14 on the collar 2, the gas cylinder 1 and the piercing member 5 cannot be relatively rotated. Advantageously, it avoids undesired frictional forces or lateral forces caused by the rotation. This rotational movement can result in damage to the sealing element and the piercing component, which in turn can lead to leakage or related accidents or losses.

The male element 10 can be in contact with one of the back of the male element 10 or a plurality of springs (not shown). During axial movement of the gas cylinder, the spring enables the male element 10 to move downward to allow the gas cylinder 1 to access the piercing member 5 for piercing the gas outlet. When the gas cylinder 1 is removed from the piercing member 5, the male member 10 supports this movement by the compression spring to eject the gas cylinder 1 from the piercing member 5. This actuation of the boot has the advantage that the piercing member 5 will only pierce a suitable gas cylinder that is designed to be able to enter the pierced casing and push the male element 10 into contact with the piercing member 5.

Figure 2 shows the connection configuration of the gas cylinder 1 and the piercing casing in a connected state. In this cross-sectional view, the gas cylinder 1 is moved toward the piercing casing by screwing the container 8 and the piercing casing together. The male element 10 is pushed rearward by the female element 14 on the collar 2 and engages the female element 14. Thereafter, only the cylinder 1 can be moved axially relative to one of the piercing members 5. The primary sealing element 3 fills the chamber 11 defined by the sealing support element 7, such that the radial expansion of one of the primary sealing elements 3 due to compression is only constrained by the sealing support element 7 (i.e., the circular wall). As can be seen in Figure 2, the sealing performance between the gas outlet 4 and the piercing member 5 is significantly enhanced by the primary sealing element 3, the sealing support member 7, the upper portion of the collar 2, the convex member 10 and the side wall 6 piercing the outer casing. . A multiple sealing collar 2 has a concave member 14, a portion above the collar, and a relatively simple structure on which the secondary sealing member 9 is disposed to maximize sealing between the piercing member 5 and the gas outlet 4. .

Figure 3 shows an exterior view of one of the gas cylinders having a collar. The collar 2 is disposed on the neck of the gas cylinder 1, and the collar 2 carries the concave member 14 and the secondary sealing member 9. The female element 14 has two recesses defined by an axial straight line and a curve so that the gas cylinder 1 can be oriented in its proper position to connect to the corresponding male element. The gas cylinder 1 having this collar can be replaceable and disposable.

Figure 4 shows a cross-sectional view of a gas cylinder with a collar from the A-A view of Figure 3. The primary sealing element 3 is shaped into an interior space defined by the upper portion of the collar such that a spacing 12 is provided between the primary sealing element and the upper portion of the collar. As shown in the figures, the spacing 12 is annular and large such that a sealing support element disposed in the pierced housing can fit into the space 12. The primary sealing element 3 comprises a wide portion and a narrow portion, wherein the wide portion forms a seal with the gas outlet 4 of the gas cylinder by completely switching the gas outlet 4 and wherein the narrow portion and the upper portion of the collar 2 define the annular spacing 12. The narrow portion of the primary sealing element can be fitted into the chamber defined by the sealing support element.

Figure 5 shows an external view of a gas cylinder 1 having a collar 2. The collar 2 comprises a secondary sealing element 9, a concave element 14, an upper portion, wherein the upper portion is higher than the concave element 14 and the primary sealing element 3. This multiple sealing collar 2 has the advantage of using a relatively simple configuration One of the sealing elements that are rigidly sealed from one of the piercing members and that prevents the rotational movement between the gas cylinder and the piercing member is undesired. In addition, it is possible to avoid connecting an improper gas cylinder when using this configuration.

In the piercing procedure, the gas cylinder 1 received in the container 8 is coupled to the piercing housing by screwing the container to the piercing housing. The female element 14 on the collar 2 pushes the outer element 10 in the piercing housing back and the primary sealing element 3 is inserted into the chamber defined by the sealing support element 7. The gas cylinder 1 is compressed onto the piercing member 5 by continuous screwing of the container 8. The primary sealing element 3 forms an axial seal and a radial seal between the piercing member 5 and the gas outlet 4. The radial expansion of the primary sealing element 3, in particular the narrow portion of the primary sealing element, is only constrained by the sealing support element 7, so that the radial sealing performance is maximized.

The collar 2 has multiple functions to prevent rotational movement of one of the piercing member and the gas cylinder and it can form a reliable seal between the piercing member and the gas outlet and between the collar and the side wall of the piercing casing. In addition, the collar 2 prevents the use of an improper gas cylinder and also protects the primary sealing element during transport and handling.

1‧‧‧ gas cylinder

2‧‧‧ collar

3‧‧‧Primary sealing element

4‧‧‧ gas export

5‧‧‧ piercing parts

6‧‧‧ side wall

7‧‧‧Seal support element

8‧‧‧ Container

9‧‧‧Separate sealing element

10‧‧‧Exposed components

11‧‧‧ chamber

12‧‧‧Internal space/interval

13‧‧‧ thread

14‧‧‧ concave components

Figure 1 shows a cross-sectional view of a connection configuration of a gas cylinder received in one of the containers for oxygenating the wine.

Figure 2 shows a cross-sectional view of a gas cylinder connected to a piercing housing.

Figure 3 shows an exterior view of one of the gas cylinders having a collar.

Figure 4 shows a cross-sectional view of a gas cylinder with a collar from the A-A view of Figure 3.

Figure 5 shows an exterior view of one of the gas cylinders having a collar.

1‧‧‧ gas cylinder

2‧‧‧ collar

3‧‧‧Primary sealing element

4‧‧‧ gas export

5‧‧‧ piercing parts

6‧‧‧ side wall

7‧‧‧Seal support element

8‧‧‧ Container

9‧‧‧Separate sealing element

10‧‧‧Exposed components

11‧‧‧ chamber

12‧‧‧Internal space/interval

13‧‧‧ thread

14‧‧‧ concave components

Claims (14)

A connection configuration for a gas cylinder having a bottle neck having a side surface and a top surface of a gas outlet, the connection configuration comprising: a piercing casing for receiving the gas cylinder The bottleneck includes an opening, a side wall and a bottom wall; a piercing member disposed in the piercing housing for piercing the gas outlet; a collar disposed in the reservoir The neck of the gas cylinder has a side extending over the top surface of the gas cylinder and defining an inner space, the inner space being delimited by the top surface of the gas cylinder and the collar; a primary sealing element disposed in the interior space to form a seal with the top surface of the gas cylinder; wherein the primary sealing element is configured such that a space is formed between the collar and the primary sealing element; the connection The arrangement is characterized in that a sealing support member is disposed in the piercing housing, the sealing support member defining a cavity having an opening between the sealing support member and the piercing member in a direction of the opening of the piercing housing Room, when a piercing member received in the collar to pierce the gas outlet and when the primary sealing member is radially restrained from being restrained in the chamber by a sealing member that forms a seal with the piercing member, The primary sealing element is inserted into the chamber. The configuration of claim 1, wherein the sealing support member comprises a circular wall extending axially from the piercing member and extending axially from the bottom wall of the piercing housing in the direction of the opening of the piercing housing, wherein When the gas cylinder is pushed into the piercing casing, the axial direction is the direction of the rotation axis of the gas cylinder. The configuration of claim 1 or 2, wherein the primary sealing element and the collar are not attached to the piercing member and the sealing support member. The arrangement of any of the preceding claims, wherein the primary sealing element is only constrained by the sealing support element and the piercing member in response to forming a seal with the piercing member. A configuration according to any of the preceding claims, wherein a space is provided between the sealing support member and the side wall of the piercing casing, and other connecting members for connecting to the gas cylinder having the collar can be provided Configured in this space. The configuration of claim 5, wherein the other connecting elements comprise one of the male elements corresponding to one of the female elements disposed on the collar of the gas cylinder. The configuration of claim 6, wherein the male component and its corresponding concave component are respectively formed in the piercing housing and the collar, such that the gas cylinder is prevented after engaging the male component and the female component Relative rotation with one of the piercing members. A configuration according to any of the preceding claims, wherein a container is provided for receiving the gas cylinder, the container comprising a connecting member for connection to the piercing housing. The arrangement of claim 8 wherein the side wall of the piercing casing has a thread on its outer wall that is threadably engageable with one of the inner walls of the container. The configuration of any of the preceding claims, wherein the collar includes a secondary sealing element on its side that is configured to form a seal between the sidewall of the pierced casing and the collar. The configuration of claim 10, wherein the secondary sealing element is formed as an O-ring on the collar. The configuration of claim 9 or 11, wherein a gas cylinder having a collar is provided, the collar defining the interior space for receiving the primary sealing element and the concave element as claimed in the preceding claim The secondary sealing element is disposed on the collar. The configuration of any of the preceding claims, wherein the provision comprises more than 21% by volume of oxygen A gas cylinder, preferably more than 80% by volume of oxygen, more preferably more than 99% by volume of oxygen. The configuration of any of the preceding claims, wherein the gas cylinder is portable.