EP2663801A1 - Connecting device for cylinders of various shapes and sizes - Google Patents
Connecting device for cylinders of various shapes and sizesInfo
- Publication number
- EP2663801A1 EP2663801A1 EP12705416.1A EP12705416A EP2663801A1 EP 2663801 A1 EP2663801 A1 EP 2663801A1 EP 12705416 A EP12705416 A EP 12705416A EP 2663801 A1 EP2663801 A1 EP 2663801A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- housing
- flat surface
- annular flat
- gasket
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 16
- 229920001971 elastomer Polymers 0.000 claims description 2
- 239000000806 elastomer Substances 0.000 claims description 2
- 229920003225 polyurethane elastomer Polymers 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/04—Arrangement or mounting of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/037—Quick connecting means, e.g. couplings
- F17C2205/0373—Adapters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/03—Dealing with losses
- F17C2260/035—Dealing with losses of fluid
- F17C2260/036—Avoiding leaks
Definitions
- the present invention relates to a device for connecting various devices, in particular a pressure reducer, suitable for mounting on cylinders provided with connection and closing means of various shapes and sizes.
- connection means of various shapes and sizes, in particular small cylinders filled with liquefied carbon dioxide, in which said connection means comprise an external thread and an annular flat surface coaxial with said thread.
- Said closing means normally comprise a needle valve, also coaxial with said thread.
- a device that is connected with said cylinder for example a pressure reducer, must be provided with an internal thread and with a corresponding annular flat surface coaxial with said internal thread. Connection with the cylinder takes place by screwing and the seal is obtained by a gasket interposed between said corresponding annular flat surfaces.
- connection element will be provided with a pin, also coaxial with the thread, which, after screwing, will press on the needle to open the valve.
- connection and closing means Although various cylinders provided with the connection and closing means described exist on the market, said means differ, albeit slightly, in shape and size. Therefore, a specific connection element must be used for each of said cylinders.
- the use of gaskets of different height, as a function of the gap to be filled, does not solve the problem. In fact, if a hard gasket is used, the vibrations that are triggered during passage of the gas can cause unscrewing, while by using a soft gasket optimum clamping is obtained, but the gasket is subject to significant wear and must therefore be changed after two or three cylinder replacements. It must also be taken into account that said devices are often used by unqualified people, who might not fully understand the problems of safety linked to the use of devices subjected to relatively high pressures.
- the present invention solves the problem posed by proposing a device, in conformity with claim 1 , suitable for mounting on cylinders provided with connection and closing means, wherein:
- connection means comprise an external thread and an annular flat surface coaxial with said external thread
- said closing means comprise a needle valve, also coaxial with said external thread
- said pressure reducer being contained in a housing provided with an internal thread and an annular flat surface, coaxial with said internal thread, the connection with said cylinder taking place by screwing and said needle valve being opened by5 the pressure exerted by a pin, present on said housing, said device being characterized in that, after clamping has taken place, said annular flat surface of said housing is in contact with said annular flat surface of said cylinder, the seal being obtained by a gasket that fits into a seat of said housing, said gasket being deformed due to said clamping and exerting, through spring reaction on the0 bottom of said seat and on said annular flat surface of said cylinder, the force required to obtain, between said cylinder and the housing, pressure seal of the gas drawn up.
- the device according to the invention is characterized in that, after clamping has taken place, the surface of the gasket that comes into contact with5 said annular flat surface of said cylinder, said annular flat surface of the housing and said annular flat surface of said cylinder lie on the same plane. In this way, after clamping has taken place, contact is produced between rigid surfaces, in general made of brass or another metal, which effectively prevents unscrewing.
- a pressure reducer as this is the device that is applied directly to the cylinder in the0 majority of cases.
- the technical solutions that will be described can also be applied to devices of different type, such as fixed metal or flexible pipes of the type used for high pressure pipes, to connect cylinder and reducer, or universal adapters.
- Figs. 1 (a, b) show a pressure reducer adapted to be applied to cylinders provided with connection and closing means of various shapes and sizes;
- Figs. 2, 3, 4 (a, b, c) show the connection sequence of said pressure reducer respectively with a first, a second and a third cylinder.
- the reference numeral (1) indicates a pressure reducer device adapted to be applied to cylinders provided with connection and closing means of various shapes and sizes.
- Said device (1) comprises a housing (2) which accommodates therein a mechanism (3), of known type, which is operated by rotating a knob (4) and has the function of regulating the pressure of the gas drawn up from a cylinder (5) onto which said housing (2) is screwed through a thread (6) obtained in the part thereof that connects with said cylinder (5).
- connection means for connection with the pressure reducer device and with closing means.
- Said connection means comprise an annular flat surface (5a) and a thread (5b), while said closing means comprise a needle valve (5c).
- the housing (2) is provided, on the bottom of the thread (6), with an annular flat surface (6a) against which said annular flat surface (5a) abuts.
- a gauge (8) is connected on the side of said housing (2) to measure the delivery pressure.
- a lever (9) is also provided, to facilitate assembly and disassembly operations, said lever (9) being made by a U-bent rod, with ends (9a), bent at right angles, which fit into suitable seats (10) obtained on the housing (2).
- the lever (9) and the seats (10) are made so that the lever (9) can rotate at an angle of about 90°, so that when the lever (9) is at rest, it is positioned parallel to the axis of the device (1), and when it is used for screwing and unscrewing the device (1) on the cylinder (5), it is rotated upward by about 90° and can therefore be easily grasped to carry out the operation.
- the cylinder (5) is provided, in the part that fits into the thread (6) of the housing (2), with said needle valve (5c), which is opened by a pin (11), accommodated in the housing (2), which, when the cylinder (5) is screwed into the thread (6), presses against said needle valve (5c).
- the seal between the cylinder (5) and the housing (2) is obtained by an annular gasket (12) that fits into a specific seat (13) obtained in the housing (2).
- annular gasket (12) that fits into a specific seat (13) obtained in the housing (2).
- the force with which the gasket (12) presses against the annular flat surface (5a) of the cylinder (5) and the bottom of the seat (13) obtained in the housing (2) depends on the extent to which said gasket (12) is compressed during clamping and on its stiffness. Said parameters must therefore be selected so that said force is sufficient to guarantee the seal, taking account of the pressure of the gas.
- the gasket (12) must have sufficient flexibility to be able to completely enter the seat (13), without being subjected to permanent deformation, and sufficiently stiff to produce, as a consequence of the deformation imparted, the force required to obtain the seal.
- Said gasket (12) can be made of an elastomer, for example of polyurethane type, with Shore hardness of between 70 and 100. If necessary, the gasket (12) can be given the necessary flexibility by a configuration that makes it particularly flexible, for example by providing one or more grooves (12a).
- Fig. 2 shows the situation of Fig. 1 in greater detail.
- Fig. 2a shows the cylinder (5) and the housing (2) of the reducer (1) still decoupled.
- Fig. 2b shows the cylinder (5), partially screwed into the thread (6), in the instant in which contact takes place between the annular flat surface (5a) of the cylinder (5) and the corresponding surface of the gasket (12).
- the gasket (12) has still not been clamped between the annular flat surface (5a) of the cylinder (5) and the bottom of its seat (13), obtained in the housing (2), it does not exert any seal, said seal being reached fully when, continuing to screw the cylinder (5) into the thread (6), the gasket (12) is deformed and exerts, through reaction, the pressure required to obtain an effective seal.
- Fig. 2c shows the cylinder (5) screwed fully into the thread (6).
- the annular flat surface (5a) of the cylinder (5) is clamped against the corresponding annular flat surface (6a) of the housing (2), contact between said two flat surfaces (5a) and (6a) exerting an effective locking action.
- the pin (11) presses against the needle of the valve (5c), opening it, and the gasket (12) is deformed until it enters its seat (13) completely.
- the elastic deformation of the gasket (12) generates, through reaction, the force required for the gasket (12), to obtain the seal between the cylinder (5) and the housing (2).
- Figures. 3 (a, b, c) show the same sequence as Figs.
- a second cylinder (15) the upper end of which, although having a different shape to that of the first cylinder (5), again has an annular flat surface (15a), a thread (15b), suitable to be screwed into the thread (6) of the housing (2), and a needle valve (15c), the needle of said valve (15c) being in a position such that the pin (11) can open it when the cylinder (15) is screwed into the thread (6).
- Figs. 4 show the same sequence as Figs. 2 (a, b, c) and 3 (a, b, c), but referring to a third cylinder (25), the upper end of which, although having a different shape to that of the cylinders (5) and (15), again has an annular flat surface (25a), a thread (25b), suitable to be screwed into the thread (6) of the housing (2), and a needle valve (25c), the needle of said valve (25c) being in a position such that the pin (11) can open it when the cylinder (25) is screwed into the thread (6).
- the device (1) according to the invention suitable to be used in all possible combinations, it will be sufficient to fit, between the thread (6) and the thread of the cylinder, a ring (not shown) externally threaded so as to be screwed into the thread (6) of the housing (2), and internally threaded so as to be screwed into the thread the cylinder. It is possible to proceed in the same manner with the pin (11) which can be replaced by another pin (not shown) of suitable length to obtain correct opening of the needle valve of the cylinder.
- the device according to the invention is suitable to be applied to cylinders with connection ends of different sizes, said adjustment being obtainable also by adding and/or replacing parts.
- the variety of cylinders currently existing on the market ensures that a single reducer, without adding and/or replacing parts, is sufficient for all possible combinations.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Apparatus For Radiation Diagnosis (AREA)
- Branch Pipes, Bends, And The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI2011A000029A IT1404666B1 (en) | 2011-01-14 | 2011-01-14 | CONNECTION DEVICE FOR CYLINDERS OF DIFFERENT SHAPES AND DIMENSIONS |
PCT/IB2012/050160 WO2012095810A1 (en) | 2011-01-14 | 2012-01-12 | Connecting device for cylinders of various shapes and sizes |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2663801A1 true EP2663801A1 (en) | 2013-11-20 |
EP2663801B1 EP2663801B1 (en) | 2018-12-12 |
Family
ID=43975373
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12705416.1A Active EP2663801B1 (en) | 2011-01-14 | 2012-01-12 | Connecting device for cylinders of various shapes and sizes |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2663801B1 (en) |
IT (1) | IT1404666B1 (en) |
WO (1) | WO2012095810A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2821687A1 (en) * | 2013-07-04 | 2015-01-07 | Air Liquide Deutschland GmbH | Device and method for filling gases into high-pressure gas cylinders having different filling terminals |
IT201800003931A1 (en) * | 2018-03-26 | 2019-09-26 | Cis S R L | FITTING ELEMENT FOR CYLINDERS |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0817930A4 (en) * | 1995-12-29 | 1998-05-13 | Innovent Inc | Rapid response valve |
JP2005180614A (en) * | 2003-12-19 | 2005-07-07 | Anzai Medical Kk | Valve |
DE102005006971B3 (en) * | 2005-02-16 | 2006-08-10 | Rothenberger Ag | Adapter for connection of gas consumer, especially burner, to compressed gas cylinder has bore in which is installed a through-bored, axially freely movable pressure component for opening of cylinder valve |
DE102007005864B4 (en) * | 2007-02-06 | 2008-10-30 | Sprügel, Friedrich A. | Connecting device for connecting a pressure vessel with a Flüssiggaseinfüllstutzen |
DE102009030949A1 (en) * | 2009-06-29 | 2010-01-14 | Daimler Ag | Pressure tank i.e. hydrogen tank, for gaseous medium i.e. hydrogen, in motor vehicle, has extraction device and ring-like seal that exhibits triangular cross-section, where seal is pressed on stop surface |
-
2011
- 2011-01-14 IT ITMI2011A000029A patent/IT1404666B1/en active
-
2012
- 2012-01-12 WO PCT/IB2012/050160 patent/WO2012095810A1/en active Application Filing
- 2012-01-12 EP EP12705416.1A patent/EP2663801B1/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2012095810A1 * |
Also Published As
Publication number | Publication date |
---|---|
ITMI20110029A1 (en) | 2012-07-15 |
EP2663801B1 (en) | 2018-12-12 |
IT1404666B1 (en) | 2013-11-29 |
WO2012095810A1 (en) | 2012-07-19 |
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