EP0532435A1 - Apparat und Verfahren zum Verschliessen von Kohlensäureflaschen - Google Patents

Apparat und Verfahren zum Verschliessen von Kohlensäureflaschen Download PDF

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Publication number
EP0532435A1
EP0532435A1 EP92420305A EP92420305A EP0532435A1 EP 0532435 A1 EP0532435 A1 EP 0532435A1 EP 92420305 A EP92420305 A EP 92420305A EP 92420305 A EP92420305 A EP 92420305A EP 0532435 A1 EP0532435 A1 EP 0532435A1
Authority
EP
European Patent Office
Prior art keywords
neck
bottle
shutter
wall
annular
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
Application number
EP92420305A
Other languages
English (en)
French (fr)
Other versions
EP0532435B1 (de
Inventor
Michel Jimmy Gobrecht
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vallourec SA
Original Assignee
Vallourec SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Vallourec SA filed Critical Vallourec SA
Publication of EP0532435A1 publication Critical patent/EP0532435A1/de
Application granted granted Critical
Publication of EP0532435B1 publication Critical patent/EP0532435B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F17C13/06—Closures, e.g. cap, breakable member
    • 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
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/02—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied gases
    • 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
    • F17C2205/0311—Closure means
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/013—Carbone dioxide
    • 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
    • F17C2270/00—Applications
    • F17C2270/07—Applications for household use
    • F17C2270/0745—Gas bottles

Definitions

  • the device and the method which are the subject of the invention relate to carbon dioxide bottles, used for example as a propellant in fire extinguishers.
  • the end of the bottle to be filled, fitted with a nut and a closing cap is introduced into a filling head, to which it is connected by screwing, then, after filling, the screw is screwed.
  • a screwing means driven for example by a geared motor, housed outside this filling head, the nut thus tightening the seal which closes the bottle.
  • Such bottles are refillable and can, after use, be refilled and closed with a new closure cap tightened by a nut.
  • the device according to the invention achieves these results. It makes it possible in particular to carry out rapid filling with liquid carbon dioxide of metal bottles and, as soon as filling is completed, to seal these bottles in a perfectly sealed and durable manner with a very high speed. very high security.
  • the device according to the invention relates to the sealing of metal bottles containing carbon dioxide, these bottles comprising a neck.
  • the device comprises a filling head provided at the lower part with an introduction orifice in which a bottle to be filled can be partially engaged, by its end provided with a neck, in order to introduce the desired quantity of anhydride therein. carbonic.
  • the bottle thus engaged in the filling head rests on a support means and a seal provides a sealed connection between the wall of the bottle and the orifice of the filling head.
  • This comprises means for introducing liquid carbon dioxide under pressure in a determined quantity to ensure the filling of the bottle through its neck which is provided with a metal shutter, placed on this neck in partial interlocking to allow the filling.
  • a rigid metal rod tightly mounted in the axis of the filling head is able to come to the shutter contact with a relative movement, along the axis of the filling head, under the action of a pushing means, for pressing an annular edge of the shutter against the annular edge of the end of the neck.
  • the device also includes a source of low-voltage, high-intensity electrical energy, one of the two poles of which is connected to the axial metal rod directly or indirectly and the second pole of which is likewise connected to the wall of the bottle so ensuring in a very short time, preferably less than one second, the sealed welding of the two annular edges of the shutter and of the neck by fusion limited to the contact zone of these.
  • the support means on which the base of the metal bottle rests can be moved along the axis of the filling head, in a relative movement, in order to engage the end provided with a neck in the filling head, up to the required level under the action of a means of movement.
  • connection between the second pole of the electrical energy source and the wall of the bottle is ensured by at least two retractable metal rods, sealingly crossing the side wall of the filling head at points distributed around the axis of this filling head, these rods being able to converge in the direction of this axis while coming to bear against this side wall in zones devoid of an insulating layer, these zones possibly being located or not on the neck or in the vicinity of the neck.
  • the low-voltage and high-intensity electric power source includes electrical means, such as thyristors, making it possible to obtain a maximum current density in the welding area, of at least 50 amperes per mm2 the source of electrical energy being arranged so as to cause the welding zone to pass through at least two separate current pulses, each lasting less than half a period, successively passing through the welding zone in opposite directions.
  • electrical means such as thyristors
  • the thrust means allowing the annular edge of the shutter to bear against one another against the annular edge of the neck, is a means connected to the axial rod which makes it possible to move the latter the along the axis of the filling head until the end of this rod comes to bear against the shutter, then presses the two annular edges in order to allow their welding by passage of current. It is also possible to achieve this thrust, also after filling the bottle, by moving it in the direction of the axial rod in a fixed position, using the means of displacement of the support means of the bottle, in order to come to bear. the annular edge of the neck against that of the shutter itself pressing against the end of the axial rod.
  • At least one insulating passage means is provided for the electrical connection between one of the two poles of the electrical energy source and the welding zone of the two annular edges, at the level of the crossing of the metal wall of the head. filling.
  • this insulating passage means is housed around the rod axial when it crosses this wall; preferably also a dynamic seal allows this axial rod to slide through this insulating passage means itself connected to the wall of the filling head by a seal.
  • the lateral retractable metal rods are slidably mounted through insulating passage means by means of sealed dynamic joints and these insulating passage means are themselves connected to the wall of the filling head by a sealing joint.
  • a purging means makes it possible to eliminate the carbon dioxide contained in the filling head after welding of the shutter; this purge means is a passage through the wall of the filling head provided with a purge valve.
  • the wall of the filling head is made of a non-magnetic metal or alloy.
  • the bottle is made of any metallic material which can be used, such as, for example, non-alloyed or low-alloyed drawing steel. It is the same for the shutter.
  • the invention also relates to a method for closing a metal bottle for non-refillable carbon dioxide which is filled and then closed by means of a filling head in which the end of the bottle having a neck is engaged. .
  • a metal obturator is put in place on the neck of the bottle beforehand, by partial fitting, so as to leave a gap between the annular edge of this obturator and the also annular end edge of the neck, the two edges being able to come to bear against one another, the side wall of this shutter being shaped so as to guide the shutter when it is placed on the neck and also being shaped so as to ensure that it remains fitted during the introduction of the end of the bottle comprising the neck into the filling head and during filling with carbon dioxide, while leaving passages allowing the introduction of liquid carbon dioxide into the bottle before closing.
  • the latter is closed by exerting sufficient pressure on the shutter so as to put the annular edge of the latter in abutment against the annular edge of the neck by relative movement of towards each other.
  • the annular edge of the shutter is then welded to the annular edge of the neck by sending at least two unidirectional discharges in the opposite direction through the contact zone of the two annular edges; these two consecutive discharges of low voltage and very high intensity each having a duration of less than one hundredth of a second which is sufficient to weld by fusion to a small thickness these edges in their contact zone. Then extracted, after purging of the carbon dioxide contained in the filling head, the bottle thus closed tightly.
  • the invention also relates to the shutter for carbon dioxide bottle which allows the implementation of the method according to the invention thanks to the possibility that it offers a fitting on the neck of the bottle in partial interlocking, this position not obstructing the filling and then allowing the bottoming and welding thanks to the device according to the invention.
  • This shutter comprises at its upper end an annular edge capable of coming to bear against the annular end edge of the neck of the bottle with a view to closing it by welding.
  • This shutter also comprises a lower part, capable of cooperating with the lateral wall of the neck during its depression along the axis of this neck, thanks to guide edges, distributed around the axis of the shutter and suitable for come into elastic abutment against the generators of the wall opposite the neck.
  • guide edges are slightly inclined with respect to these generators of the neck to come into abutment against them in the partially nesting position, passages being provided between these guide edges to allow the liquid carbon dioxide to enter the bottle after passage between the two annular edges spaced apart in the partial nesting position.
  • the lower part of the shutter is a male part whose section of the wall in a plane perpendicular to the axis of the shutter is not circular, the guide edges being slightly inclined relative to the generatrices of the inner wall facing the neck so as to approach it from bottom to top to come into elastic abutment against it in the partial nesting position.
  • Passages are provided between the wall of this male part and the interior wall of the neck between the guide edges. These passages join the annular passage formed between the annular edges facing the shutter and the neck.
  • the male part has the shape of a truncated pyramid, the rounded edges of which constitute the guide edges, the sides of the pyramid constituting the passages for liquid carbon dioxide and the small base of the pyramid, engaged inside the neck. constituting the opening wall of the bottle in service by a piercing means such as a punch.
  • the shutter may include a female lower part whose guide edges cooperate with the external side wall of the neck, the passages for the liquid carbon dioxide being formed between the guide edges by means of an adapted shape of the side wall of the shutter. between these guide edges, or even through holes through this side wall.
  • the bottles are produced from seamless tubes of revolution, for example made of low-carbon unalloyed steel, the neck and the end opposite to it being produced by cold forming, preferably.
  • the end opposite the neck is preferably given a rounded shape closed, for example, by a welded obturator.
  • Figure 1 is an elevational and sectional view of the filling head according to the invention in which is engaged the neck of a bottle to be filled.
  • FIG. 1A is a view of an insulating passage for a current supply rod through the wall of the filling head of FIG. 1.
  • Figure 2-1 is an elevational and sectional view of the shutter according to the invention in the partial nesting position in the neck of the bottle.
  • Figure 2-2 is a view of the shutter of Figure 2-1 in the closed position.
  • Figure 2-3 is a top view of the shutter in Figures 2-1 and 2-2.
  • FIG. 1 shows a metal bottle 1 of revolution whose end provided with the neck 2 is engaged in the filling head 3.
  • the bottle of this example was produced by forming a section of tube of non-alloy steel, suitable for stamping, seamless.
  • the neck 2 was produced by necking as well as the bottom, at the opposite end, which is closed by a disc 4 of the same metal, welded.
  • the obturator 5 Before introduction into the head 3, the obturator 5 is partially fitted onto the neck 2. This obturator 5 has at the upper part an annular edge 6 whose dimensions are determined so that it can come to bear against the annular front edge 7 of the neck 2 when the male lower part 8 is fully inserted into this neck 2.
  • the male lower part 8 of the shutter 5 produced by stamping has three guide edges such as 9 distributed around the axis X1-X1 slightly inclined at least over part of their length, relative to the generatrices of the inside wall of the neck. As shown in Figures 2-1 and 2-2 these guide edges come over part of their length in elastic support against the inner wall of the neck 2 already in the partial nesting position.
  • the male part 8 has a section in the shape of an equilateral triangle in a plane perpendicular to the axis X1-X1 the vertices such as 9-1 which correspond to the guide edges such as 9 being rounded.
  • this male part 8 has approximately the shape of a pyramid trunk whose small base 11 constitutes the opening area which, in use, must be perforated by a punching means.
  • the bottle 1 has been introduced into the head 3 provided with its shutter 5 in the partial nesting position.
  • This bottle 1 rests on a support means 12 adjustable in height along the axis X2-X2 of the filling head 3.
  • This height is adjusted so that the current supply rods 15A and 15B, capable of sliding along the transverse axis X3-X3 can come to bear against the wall 16 of the neck 2 in an area thereof without a more or less insulating protective layer.
  • the rods 15A and 15B pass through the wall 17 of the filling head 3 through insulating passages such as 18 provided with dynamic seals allowing the rods 15A and 15B to slide without excessive loss of carbon dioxide despite the filling pressure of around a hundred bars.
  • the current supply rod 25 is slidably mounted like the rods 15A and 15B through an insulating passage such as that of FIG. 1A (insulating passage 18).
  • FIG. 1A is an enlarged view of the means ensuring the passage of the 3 rods 15A, 15B and 25 for supplying the welding current.
  • the rod 25, of axis X2-X2 passes through an insulating part 18 inserted in a housing 19 formed in the metal wall 17 of the filling head 3.
  • This insulating part can be made of a ceramic or, preferably, of a material plastic, such as for example a polytetrafluorethylene.
  • This insulating part 18 allows the passage of a rod such as 25 with little play and has a good sliding coefficient.
  • a static seal, such as the O-ring 20, provides a tight connection between the part 18 and the wall 17.
  • a dynamic seal such as the lip seal 21, ensures a tight sliding connection between the part insulator 18 and the current supply rod 25.
  • a flange 22 of polytetrafluoroethylene is screwed into the wall 17 according to the holes indicated in X4 and X5 to maintain the insulating part 18 in its housing with tightening of the O-ring 20 and maintenance of the seal dynamic 21.
  • the rods 15A and 15B not only provide an electrical connection but also, thanks to a synchronized drive means not shown, the centering of the neck 2 whose axis is placed in coincidence with that X2-X2 of the filling head 3.
  • the tubular passage 26 is connected to a pipe, not shown, for injecting liquid carbon dioxide under a pressure of the order of one hundred bars. The amount thus injected is precisely determined to ensure the introduction into the bottle of the desired amount of this liquid carbon dioxide through the passages such as 10 in a very short time of the order of a second. Part of the carbon dioxide remains in the interior cavity of the head 3.
  • a pushing means (not shown) lowers the current supply rod 25 until it presses against the annular edge 6 of the shutter 5 and the male part 8 is fully engaged in the neck 2.
  • the diameter of the rod 25 is determined to correspond substantially to the outside diameter of the annular edges 6 and 7.
  • One of the two poles of the electric power source is connected to the axial current supply rod 25 and the other is connected to the two lateral rods 15A, 15B in parallel.
  • the current density, greater than 50 A / mm2 preferably reaches 100 to 300 A / mm2.
  • the current supply rods 15A, 15B and 25 are preferably made of copper or a high conductivity alloy based on copper. They are advantageously cooled by an internal water circulation, not shown.
  • the filling head 3 is purged of the carbon dioxide it contains by opening a not shown purge valve which is connected, also not shown, to the tubular passage 28.
  • the bottle 1 is then extracted from the head filling 3 by lowering the support means 12.
  • the wall 17 of the filling head 3 is made of a metal or non-magnetic alloy to avoid disturbances in the distribution of the welding current.
  • a metal or non-magnetic alloy for example, an austenitic steel or an aluminum alloy or the like is used.
  • a shutter 5 is advantageously used provided with a male part 8 which fits inside the neck, it is also possible to use a shutter comprising a female bottom part inside which fits the neck 2 In one case as in the other, the guide edges allow a partial nesting by coming into elastic support on the wall opposite the neck.
  • the bottle 1 is advantageously made from a steel tube, it can also be done by forming a steel sheet. It can also be made of any other suitable metal.
  • the invention also relates to the method of filling a non-refillable metal bottle with liquid carbon dioxide.
  • This process consists in providing a bottle with a shutter 5 able to be placed in the partial nesting position, then, after fitting the neck 2 in a filling head 3, in filling, then final sealing by welding the shutter using the shutter 5 and the filling head 3 previously described.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Basic Packing Technique (AREA)
  • Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)
  • Wrapping Of Specific Fragile Articles (AREA)
  • Carbon And Carbon Compounds (AREA)
EP92420305A 1991-09-12 1992-09-10 Apparat und Verfahren zum Verschliessen von Kohlensäureflaschen Expired - Lifetime EP0532435B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9111462 1991-09-12
FR9111462A FR2681406B1 (fr) 1991-09-12 1991-09-12 Dispositif permettant l'obturation de bouteilles d'anhydride carbonique et procede pour sa mise en óoeuvre.

Publications (2)

Publication Number Publication Date
EP0532435A1 true EP0532435A1 (de) 1993-03-17
EP0532435B1 EP0532435B1 (de) 1996-08-14

Family

ID=9417030

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92420305A Expired - Lifetime EP0532435B1 (de) 1991-09-12 1992-09-10 Apparat und Verfahren zum Verschliessen von Kohlensäureflaschen

Country Status (4)

Country Link
EP (1) EP0532435B1 (de)
AT (1) ATE141396T1 (de)
DE (1) DE69212749D1 (de)
FR (1) FR2681406B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2779656B1 (fr) 1998-06-15 2000-08-11 Extincteurs Harden Tube detasseur pour extincteur a gaz auxiliaire propulseur de poudre extinctrice, tete d'extincteur associee audit tube et extincteur comprenant une telle tete

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1478959A (fr) * 1965-05-06 1967-04-28 British Oxygen Co Ltd Procédé et appareil pour remplir un récipient avec un fluide sous pression et le fermer hermétiquement
WO1990011233A1 (en) * 1989-03-23 1990-10-04 Sparklet Devices, Inc. A weldably sealed oxygen container

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1478959A (fr) * 1965-05-06 1967-04-28 British Oxygen Co Ltd Procédé et appareil pour remplir un récipient avec un fluide sous pression et le fermer hermétiquement
WO1990011233A1 (en) * 1989-03-23 1990-10-04 Sparklet Devices, Inc. A weldably sealed oxygen container

Also Published As

Publication number Publication date
EP0532435B1 (de) 1996-08-14
FR2681406A1 (fr) 1993-03-19
ATE141396T1 (de) 1996-08-15
DE69212749D1 (de) 1996-09-19
FR2681406B1 (fr) 1995-07-28

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