EP3193072B1 - Universal protector for gas cylinder - Google Patents

Universal protector for gas cylinder Download PDF

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Publication number
EP3193072B1
EP3193072B1 EP16305024.8A EP16305024A EP3193072B1 EP 3193072 B1 EP3193072 B1 EP 3193072B1 EP 16305024 A EP16305024 A EP 16305024A EP 3193072 B1 EP3193072 B1 EP 3193072B1
Authority
EP
European Patent Office
Prior art keywords
ring
gas cylinder
thread
seat
annular shell
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.)
Active
Application number
EP16305024.8A
Other languages
German (de)
French (fr)
Other versions
EP3193072A1 (en
Inventor
Emmanuelle PERDRIX
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.)
Rovip SA
Original Assignee
Rovip 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 Rovip SA filed Critical Rovip SA
Priority to EP16305024.8A priority Critical patent/EP3193072B1/en
Publication of EP3193072A1 publication Critical patent/EP3193072A1/en
Application granted granted Critical
Publication of EP3193072B1 publication Critical patent/EP3193072B1/en
Active legal-status Critical Current
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C13/00Details of vessels or of the filling or discharging of vessels
    • F17C13/005Details of vessels or of the filling or discharging of vessels for medium-size and small storage vessels not under pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2201/00Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01Shape
    • F17C2201/0104Shape cylindrical
    • F17C2201/0109Shape cylindrical with exteriorly curved end-piece
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2201/00Vessel construction, in particular geometry, arrangement or size
    • F17C2201/03Orientation
    • F17C2201/032Orientation with substantially vertical main axis
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2201/00Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05Size
    • F17C2201/058Size portable (<30 l)
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2205/00Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01Mounting arrangements
    • F17C2205/0153Details of mounting arrangements
    • F17C2205/0157Details of mounting arrangements for transport
    • F17C2205/0165Details of mounting arrangements for transport with handgrip
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2205/00Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0308Protective caps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2221/00Handled fluid, in particular type of fluid
    • F17C2221/03Mixtures
    • F17C2221/032Hydrocarbons
    • F17C2221/035Propane butane, e.g. LPG, GPL
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2223/00Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146Two-phase
    • F17C2223/0153Liquefied gas, e.g. LPG, GPL
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2223/00Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/033Small pressure, e.g. for liquefied gas
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2260/00Purposes of gas storage and gas handling
    • F17C2260/01Improving mechanical properties or manufacturing
    • F17C2260/011Improving strength
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2270/00Applications
    • F17C2270/07Applications for household use
    • F17C2270/0745Gas bottles

Definitions

  • the present invention relates to the field of protective devices for protecting a gas cylinder valve for liquefied, dissolved or compressed gases. More specifically, it relates to a gas bottle cap.
  • the cylinder valve When transporting or handling gas cylinders, the cylinder valve may be subject to shock and damage. To avoid this, the gas cylinders are equipped with a safety device called protective cap.
  • the protective caps In order to allow access by the user to the cylinder valve, the protective caps must be open at the top.
  • the protective caps must also comply with ISO 11117, according to which the upper end of the protective cap must protrude by a minimum height from the tap to the open position, in order to prevent any shock likely to damage it.
  • the bottles are filled in filling plants by means of automata.
  • PLCs require a minimum space to operate around the cylinder valve.
  • the taps have a lateral orifice allowing the filling of the bottles.
  • the filling is done by means of a cane.
  • the hat must have a lateral opening allowing access to the filling rod.
  • the recent improvements of the protective caps aim at reducing the weight of the protective caps for example by using plastic materials or by modifying the structure of the protective caps.
  • the French patent FR3013101 A1 of the present Applicant discloses a protective cap 200 made by molding a polymeric resin so as to reduce the weight of the cap while complying with the ISO 11117 standard.
  • This protective cap 200 is illustrated in FIG. figure 1 of the state of the art in a mounting position on a cylindrical neck 22 of a gas cylinder 21. It corresponds to the preamble of claim 1.
  • the gas bottle 21 consists of a pressurized container shaped with a generally domed convex upper portion having a cylindrical neck 22 projecting and in a central position. This neck 22 has a thread 23 on its lateral periphery.
  • the gas bottle 21 also comprises a valve 24 secured in a central position on the upper face of the cylindrical neck 22. This valve 24 usually comprises an opening and closing wheel 25 in the upper part and a lateral orifice 26 for the gas outlet and filling the gas bottle 21.
  • the side port 26 extends horizontally, perpendicularly to the vertical axis of the valve body 24.
  • the protective cap 200 is intended in particular to protect the valve 24 to prevent it from being damaged or torn in case of a fall or shock, and to facilitate the handling of the gas bottle 21.
  • the protective cap 200 comprises three separate parts, namely a ring 300, a protective body 310 and a lock nut 320.
  • the ring 300 has an opening 330 provided with a thread 340 complementary to the thread 23 of the cylindrical neck 22 so as to allow screwing the ring 300 on the cylindrical collar 22.
  • the nut 320 against also has an opening 350 provided with a complementary thread 360 with thread 23 of the cylindrical collar 22 so as to allow a face of the nut 320 against the cylindrical collar 22.
  • the cover body 310 comprises a base 400 and an annular cover 420 extending from the radial end of the base 400.
  • the base 400 has a lower opening 410 intended to allow the passage of the valve 24 of the gas bottle 21 and provided to be mounted by clamping between the ring 300 and the lock nut 320.
  • the base 400 extends to the annular shell 420 arranged on part of its periphery.
  • the first height h1 of the annular shell 420 is chosen so that, when the protective cap 200 is mounted on the gas bottle 21, the annular shell 420 exceeds the height h0 of the valve 24.
  • the first height h1 is chosen to be greater than the height h0 of the assembly formed by the cylindrical neck 22 and the valve 24 of the gas cylinder 21 in order to comply with the ISO11117 standard.
  • the annular shell 420 also has a first lateral opening 440 allowing an automaton to fill the gas bottle 21 without the need to disassemble, even partially, the annular shell 420.
  • a second lateral opening 450 is also provided in the annular shell 420 so as to position a handle 460.
  • the annular shell 420 has a second height h2, greater than the first height h1, forming four pillars 480 disposed on either side of each lateral opening 400, 450.
  • the annular shell 420 has a honeycomb structure, as illustrated in FIG. figure 2 of the state of the art.
  • This honeycomb structure comprises an inner wall 510 made of material with the upper edge of the base 400 and an outer wall 500 connected to the inner wall 510 by an upper flange 540 extending radially between the inner walls 510 and outer 500 . cavities are formed between the walls 510, 500 by internal partitions 520.
  • Each internal partition has a first section 520 extending radially between the walls 500, 510 and over the entire length of the walls 500, 510.
  • Each internal partition comprises, in in addition, a second section 530 made of material with the first section 520 and extending on the lower face of the base 400.
  • This honeycomb structure makes it possible to limit the weight of the protective cap 200.
  • this annular shell 420 is generally performed by molding a plastic material such as a polymeric resin.
  • the mold thus has a shape complementary to that of the annular shell 420 with a greater height at the level of the formation zone of the pillars 480 disposed on either side of each lateral opening 400, 450.
  • the object of the invention is to obtain a protective cap of a gas cylinder with a satisfactory ratio between the weight and the resistance while limiting the risk of breakage of the injection mold and the time of realization of the protective cap.
  • the invention proposes to solve this problem by means of a protective cap whose length of the internal partition positioned at a pillar is reduced. It follows that the mold has a continuity of material between the element forming the pillar and the element forming the cell directly in the vicinity of this element forming the pillar. The resistance of the mold is thus improved.
  • the invention relates to a protective cap of a gas cylinder having a base having an opening for attachment to a cylindrical neck of a gas cylinder, and an annular shell extending from the radial end of the base and having a first height, the annular shell being configured to surround a valve of a gas cylinder over its entire height.
  • the annular shell has at least one lateral opening configured to allow lateral access to a lateral orifice of the gas cylinder valve without disassembling the annular shell and / or to allow mounting of a handle.
  • the annular shell comprises a honeycomb structure formed by two walls connected by internal partitions extending radially between the walls.
  • the annular shell has a second height, greater than the first height, forming at least one pillar at an end end opening on the at least one lateral opening.
  • the cap of the invention is characterized in that the inner wall of the honeycomb structure closest to the pillar extends over only a portion of the first height of the annular shell.
  • the invention thus makes it possible to improve the strength of the mold intended to manufacture the protective cap, particularly at the level of the pillar shape zone.
  • the invention does not modify the structure of the other internal partitions and allows to maintain a satisfactory ratio between the weight and the resistance of the protective cap. It is also possible to note that this removal of material makes it possible to increase the elasticity of the annular shell at the level of the pillar thus improving the impact resistance in this region.
  • the protective cap also comprises a ring having on its internal lateral face a thread intended to cooperate with a thread of a gas bottle, and connection means between the base and the ring.
  • the base may comprise a thread intended to cooperate directly with a thread of a gas cylinder without changing the invention.
  • Some gas cylinders have a weld seam positioned near the cylindrical neck bearing the faucet. It follows that the ring can rest on this weld bead when it is screwed on the cylindrical neck.
  • the weld beads generally have surfaces whose flatness is not guaranteed and the support of the ring on this surface can induce a shift of the ring in the thread of the thread of the cylindrical neck.
  • the ring may withstand significant forces when tightening the various elements and cause a bad position of the protective cap, which can lead to the breakage of the ring.
  • the lower face of the ring comprises a concentric rib extending from its internal diameter and configured to form a stop, the ring being intended to be screwed onto a gas cylinder until the rib abuts against the top wall of the gas cylinder.
  • the ring comprises a stop at the bottom of the thread configured to form a stop, the ring being intended to be screwed onto a gas bottle until the thread of the gas cylinder abuts against the stop at the bottom of the net.
  • the height of the valve of a gas cylinder may vary. Thus, some valves protrude from the cap and are not protected at their upper ends. In addition, it is not possible to increase the height of the hat body because some storage spaces are dimensioned in height to receive gas bottles with a cap with a predetermined height. There is therefore a need for protection of the upper end of a gas cylinder provided with a high valve.
  • This embodiment solves this problem using a multi-size hat whose body has a constant height and intended to abut on the thread of the valve instead of abutting against the top wall of the bottle. gas.
  • the ring has a shoulder disposed at its upper face and extending radially from the inner diameter to the center of the ring, the shoulder being configured to form a bearing abutment, the ring being intended to be screwed on a gas bottle until the top face of a cylindrical neck of the gas cylinder mounts against the shoulder.
  • the ring comprises on its external lateral face positioning structures, in particular vertical ribs which, in combination with complementary positioning structures that the base, in particular on its internal lateral face, allow the desired positioning of the lateral opening, while preventing the rotation of the base relative to the ring when they are mutually engaged.
  • This embodiment makes it possible to position the lateral orifice of the valve of the bottle in front of a lateral opening of the protective cap.
  • the clamping ring has a lower rim extending substantially horizontally outwards.
  • the upper face of the flange is also provided with positioning structures which cooperate with corresponding structures arranged on the lower periphery of the base.
  • the connecting means between the base and the ring are formed by deformable lugs which advantageously comprises the internal face in the lateral opening of the base cooperating with housings that preferably comprises the side face outer ring.
  • the lugs extend obliquely in the mounting direction of the base in the ring so as to allow deformation of the lugs during assembly of the base until the lugs enter the housing, the lugs then taking their initial shapes so as to block the withdrawal of the base of the ring.
  • This embodiment allows a particularly fast mounting by clipping between the base and the ring.
  • connection means between the base and the ring are made with a counter nut having an opening provided with a complementary thread with the thread of a cylindrical neck of a gas cylinder, the against-nut being configured to be screwed on a thread of a gas cylinder so as to grip the base between the ring and the lock nut.
  • This embodiment ensures a solid and reversible mounting between the base and the ring.
  • the lock nut has gripping structures extending transversely in the locknut and configured to allow the fingers of a tool to drive the counter-nut in rotation to mount and / or disassemble the protective cap on a gas cylinder, the lock nut also having a groove disposed on the top of the locknut so as to guide the movements of the tool during a coupling phase between the fingers and the bores.
  • the tool can be rotated thereby causing the upper face of the locknut to be machined.
  • This embodiment makes it possible to guide movements of the fingers of the tool in the groove so as to allow rapid cooperation between the fingers and the gripping structures. It follows that the risk of machining the upper face of the lock nut is reduced.
  • a tool for mounting a protective cap as previously described, the tool comprising a base provided with fingers, adapted to the diameter of a lock nut of a protective cap, a partially cylindrical body whose diameter is greater than that of the base so as to surround a valve whose lateral orifice extends beyond the cylindrical neck of a gas cylinder, and a opening in the body and in the base so as to allow the positioning of the tool on a counter nut by vertical translation despite the presence of the lateral orifice.
  • the invention relates to a gas cylinder comprising a protective cap according to the first aspect of the invention.
  • the invention relates to a protective cap 20 for a gas bottle 21, complying with the ISO11117 standard, while limiting the risk of breakage of the manufacturing mold.
  • the protective cap 20 will now be described in detail with reference to the Figures 3 to 5 , which represent a first nonlimiting embodiment of the invention.
  • the protective cap 20 is intended to be attached to a gas cylinder 21 as illustrated in FIG. figure 1 of the state of the art.
  • the notions of top, bottom, bottom and top are defined according to the orientation adopted by the protective cap 20 when it is mounted on a gas cylinder 21 in position right as illustrated on the figure 1 of the state of the art. It is obvious that the gas bottle 21 can be stored or positioned differently, for example with the head down, the notions of top, bottom, bottom and top of the protective cap 20 are to be modified accordingly.
  • a gas bottle 21 consists of a pressurized container shaped with a generally domed convex upper portion having a cylindrical neck 22 projecting and in a central position.
  • This neck 22 has a thread 23 on its lateral periphery.
  • the gas bottle 21 also comprises a valve 24 secured in a central position on the upper face of the cylindrical neck 22.
  • This valve 24 usually comprises an opening and closing wheel 25 in the upper part and a lateral orifice 26 for the gas outlet and filling the gas bottle 21.
  • the side port 26 extends horizontally, perpendicularly to the vertical axis of the valve body 24.
  • the protective cap 20 is intended in particular to protect the valve 24 to prevent it from being damaged or torn in the event of a fall or shock, and to facilitate the handling of the gas bottle 21.
  • the protective cap 20 can be made in one piece.
  • the protective cap 20 comprises at least two separate parts, namely a ring 30 and a protective body 31.
  • the protective body 31 comprises a base 40 and an annular shell 42 extending from the radial end of the base 40. It is through the base 40 that the protective body 31 of the protective cap 20 is secured to the gas bottle 21.
  • the base 40 has a lower opening 41 intended to allow the passage of the valve 24 of the gas bottle 21.
  • the base 40 extends to the annular shell 42 arranged on part of its periphery.
  • the first height h1 of the annular shell 42 is chosen so that, when the protective cap 20 is mounted on the gas bottle 21, the annular shell 42 exceeds the height h0 of the valve 24.
  • the annular shell 42 also has a first lateral opening 44 allowing an automaton to fill the gas bottle 21 without it being necessary to dismantle the annular shell 42 even partially .
  • a second lateral opening 45 is also formed in the annular shell 42 so as to position a handle 46.
  • the annular shell 42 has a second height h2 , greater than the first height h1, forming four pillars 48 arranged on either side of each lateral opening 40, 45.
  • the first height h1 is measurable between the lower end of the base 40 and the normal upper end of the annular shell 42, that is to say at the end of the annular shell 42 outside the pillars 48.
  • the first height h1 is chosen to be greater than the height h0 of the assembly formed by the cylindrical neck 22 and the valve 24 of the gas cylinder 21 in order to comply with the ISO11117 standard.
  • the second height h2 is measurable between the lower end of the base 40 and the upper end of the annular shell 42 at the level of the pillars 48.
  • the height h1 of the annular shell 42 can be between 80 and 90 mm while the height h2 can be between 90 and 102 mm.
  • the annular shell 42 comprises a honeycomb structure comprising an inner wall 51 made of material with the upper edge of the base 40 and an outer wall 50 connected to the inner wall 51 by an upper flange 54 extending radially between the internal walls 51 and outer 50.
  • the cells are formed between the two walls 51, 50 by internal partitions 52.
  • Each inner partition 52 has a first section 53 extending radially on the lower face of the base 40 and a second section 55 coming from material with the first section 53 and extending radially between the walls 50, 51 and in the depth of the walls 50, 51 over the entire height hl. This is the case of all internal partitions outside one of those present near the pillars 48.
  • This honeycomb structure allows to limit the weight of the protective cap 20 while conferring a satisfactory mechanical strength.
  • At least one inner partition 52 closest to the pillar 48 extends over only a portion of the first height h1 of the annular shell 42.
  • the inner partition 52 between the two walls 50, 51 is devoid of material. It follows that the first section 53 of the inner partition 52 closest to the opening 45 extends to the edge of the base 40 and does not extend to the second section 55 of the partition internal. In practice, the height of the second section 55 may be between 0 and 60% of the height h1 of the walls 50, 51 according to the desired technical characteristics.
  • the second section 55 thus reduced may constitute an amount of the pillar 48 or extend between the two walls 50, 51 directly near the pillar 48.
  • the internal partitions 52 present in the zones Z1 and Z2 constitute a delimitation of the pillars 48 surrounding the opening 45 relative to the other cells formed between the walls 50, 51 by the internal partitions 52.
  • the zone Z3 has an internal partition 52 extending directly near the pillar 48 defining the opening 44. All or part of the internal partitions 52 closest to the pillars 48 can be reduced. Indeed, in the example of figure 3 , the internal partitions 52 closest to the pillars 48 surrounding the opening 45 are reduced (zones Z1 and Z2) while the internal partitions 52 closest to the pillars 48 surrounding the opening 44 are not reduced (zone Z3).
  • the internal partitions 52 which constitute a delimitation of the pillars 48 are reduced because their reduction greatly improves the strength of the mold for making the protective body 31.
  • the protective cap 20 is preferably made of a polymeric resin. It follows that the mold intended to manufacture the protective body 31 is subjected to the pressure of the resin during the production of the protective body 31. The invention makes it possible to reinforce the elements of the mold intended to form the pillars 48 surrounding the opening 45.
  • the base 40 of the protection body 31 has a central opening 41 intended to cooperate with the ring 30 screwed onto the cylindrical neck 22 of a gas cylinder 21.
  • the ring 30 has an opening 33 provided with a thread 34 complementary to the thread 23 of the cylindrical neck 22 so as to allow screwing of the ring 30 on the cylindrical neck 22.
  • the base 40 and the ring 30 comprise complementary positioning structures .
  • these complementary structures can be made in the form of vertical ribs located on the outer face of the ring 30 and which extend on a horizontal rim of the ring 30.
  • the base 40 has complementary ribs 62 located on the internal face of its central opening 41 and which extend under the base 40. These complementary ribs, when mutually engaged, prevent the rotation of the protective body 31 with respect to the ring 30.
  • the protective body 31 is positioned so that the lateral opening 44 is situated in front of the lateral orifice 26 of the valve 24.
  • the ring 30 may also comprise a concentric rib 60 extending from the internal diameter and positioned under the lower face of the ring 30.
  • This rib 60 serves to form a stop on the top of the gas bottle 21 so as to prevent the support of the ring 30 on a weld bead disposed near the cylindrical neck 22 facing the ring 30 between the rib 60 and the outer diameter of said ring 30.
  • the height of the valve 24 of a gas cylinder 21 may vary. Thus, some valves 24 protrude from the cap and are not protected at their upper ends. In addition, it is not possible to increase the height of the protective body 31 of the protective cap 20 because some storage spaces are dimensioned in height to receive gas cylinders provided with a protective cap 20 with a height predetermined. There is therefore a need for protection of the upper end of a gas cylinder 21 provided with a valve 24 of great height.
  • the ring 30 may comprise a stop at the bottom of the thread configured to form a stop. The ring 30 is then screwed onto a gas bottle 21 until the thread 23 of the gas bottle 21 abuts against the stop at the bottom of the net.
  • the ring 30 has a shoulder disposed at its upper face and extending radially from its inner diameter towards the center of the ring 30, the shoulder being configured to form a support abutment.
  • the ring is then screwed onto a gas bottle 21 until the upper face of the cylindrical neck 22 of the gas bottle 21 abuts against the shoulder.
  • the fixing of the protective body 31 on the ring 30 can be effected in several ways.
  • the overall height of the ring 30 is less than that of the cylindrical neck 22 of the gas bottle 21 so that, when the ring 30 is screwed onto the thread 23 of the gas bottle 21, a part of this thread 23 extends projecting above the ring 30.
  • the protective body 31 is immobilized in position by the screwing of a counter-nut 32, illustrated in FIG. figure 5 on the protruding portion of the thread 23 located above the ring 30.
  • the base 40 is then sandwiched between the ring 30 and the locknut 32.
  • the base 40 has, at its upper face, a groove provided for housing the locknut 32 when it is screwed onto the upper part of the thread 23 of the cylindrical neck 22.
  • the lock nut 32 presents an opening 35 provided with a threading 36 complementary to the thread 23 of the cylindrical neck 22 so as to allow screwing of the counter nut 32 on the cylindrical neck 22.
  • the ring 30 and the locknut 32 each comprise gripping structures, respectively 61 and 62, for example in the form of orifices as shown in the figures. These gripping structures are designed to be engaged by the fingers 90 of a special screwing tool 89 adapted to screw them on the thread 23 of the cylindrical neck 22 of the bottle 21.
  • the use of a special screwing tool adapted allows the ring 30 and the lock nut 32 to be screwed tightly onto the gas bottle 21 while preventing a user, who does not possess the appropriate tool, from being able to unscrew them.
  • the use of a special tool for these screwings reinforces in this case the irreversible nature of the fastening of the protective cap 20 on the gas bottle 21 while ensuring correct positioning of the lateral opening.
  • the tool 89 comprises a cylindrical body 92 closed at its upper end by a disk 94.
  • the cylindrical body 92 is extended by a base 91 extending at an angle so that to reduce the radius of the cylindrical body 92 to reach the gripping structures 62 of the lock nut 32.
  • the tool 89 also has four fingers 90 extending transversely from the lower end of the tool 89. the radius of the cylindrical body 92 being greater than that of the lower end 93 of the tool 89, the tool 89 makes it possible to screw the lock nut 32 and / or the ring 30 even when the valve 24 exceeds the diameter of the cylindrical neck 22.
  • the tool 89 has an opening in the base 91 and in the cylindrical body 92 for positioning the tool 89 on a locknut 32 by translation despite the presence of a valve 24 whose lateral orifice 26 s' extends beyond the neck 22.
  • This opening is made between two fingers 90 of the tool 89 in a substantially straight section in the height of the tool 89 and up to about 60 to 80% of the height of the tool 89.
  • the lock nut 32 has two concentric lips 63, 64 arranged on the upper face and between which the gripping structures 62 are positioned .
  • the fixing of the protective body 31 on the ring 30 can be effected by clipping, gluing, welding, stamping the protective body 31 on the ring 30.
  • the Figures 8 and 9 illustrate a variant of the invention in which the fixing of the protective body 31 on the ring 30 is made by clipping.
  • the ring 30 has a groove 71 formed on the outer lateral face and intended to form a housing for the lugs 70 of the base 40 of the protective body 31.
  • the base 40 has four lugs 70 regularly distributed over- above the ribs 62 located on the inner face of its central opening 41.
  • the lugs 70 extend at an angle towards the top of the protective body 31.
  • the thickness of the lugs 70 is calibrated in order to impart a bending capacity to the lugs 70 during the mounting of the protective body 31 on the ring 30.
  • the protective body 31 is translationally mounted above the ring 30.
  • the lugs 70 deform against the wall of the central opening 41 of the base 40 to penetrate into the groove 71. The lugs 70 then resume their initial shapes at an angle so as to block withdrawal of the base 40 of the 30.
  • the lugs 70 may be arranged on the ring 30 and the groove formed on the base 40.
  • the present application therefore proposes a protective cap 20 complying with the ISO11117 standard.
  • the shape of the cap 20 concomitantly makes it possible to limit the weight of the protective cap 20 and to limit the mechanical stresses of the mold during the production of the body 31.
  • the present application also relates to a gas bottle 21 provided with a protective cap 20 as described above.
  • the gas bottle 21 may contain liquefied petroleum gas, butane, propane or technical gas.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Closures For Containers (AREA)

Description

DOMAINE TECHNIQUETECHNICAL AREA

La présente invention se rapporte au domaine des dispositifs de protection destinés à protéger un robinet de bouteille de gaz pour gaz liquéfiés, dissous ou comprimés. Plus précisément, elle concerne un chapeau de protection de bouteille de gaz.The present invention relates to the field of protective devices for protecting a gas cylinder valve for liquefied, dissolved or compressed gases. More specifically, it relates to a gas bottle cap.

ART ANTERIEURPRIOR ART

Lors du transport ou de la manipulation de bouteilles de gaz, le robinet de la bouteille est susceptible de subir des chocs pouvant l'endommager. Afin d'éviter cela, les bouteilles de gaz sont munies d'un dispositif de sécurité nommé chapeau de protection.When transporting or handling gas cylinders, the cylinder valve may be subject to shock and damage. To avoid this, the gas cylinders are equipped with a safety device called protective cap.

Afin de permettre l'accès par l'utilisateur au robinet de la bouteille, les chapeaux de protection doivent être ouverts sur le dessus.In order to allow access by the user to the cylinder valve, the protective caps must be open at the top.

Les chapeaux de protection doivent également respecter la norme ISO 11117, selon laquelle l'extrémité supérieure du chapeau de protection doit dépasser d'une hauteur minimale le robinet en position ouverte, afin de prévenir de tout choc susceptible de l'endommager.The protective caps must also comply with ISO 11117, according to which the upper end of the protective cap must protrude by a minimum height from the tap to the open position, in order to prevent any shock likely to damage it.

Une fois vides, les bouteilles sont remplies dans des usines de remplissage par le biais d'automates. Les automates requièrent un espace minimum pour opérer autour du robinet de la bouteille. Tout d'abord, il est nécessaire de pouvoir actionner le robinet d'ouverture et de fermeture en accédant par le haut du chapeau. En outres, les robinets présentent un orifice latéral permettant le remplissage des bouteilles. Le remplissage est effectué au moyen d'une canne. Pour cette raison, le chapeau doit présenter une ouverture latérale permettant l'accès de la canne de remplissage.Once empty, the bottles are filled in filling plants by means of automata. PLCs require a minimum space to operate around the cylinder valve. First of all, it is necessary to be able to actuate the opening and closing valve by accessing from the top of the cap. In others, the taps have a lateral orifice allowing the filling of the bottles. The filling is done by means of a cane. For this reason, the hat must have a lateral opening allowing access to the filling rod.

En outre, les améliorations récentes des chapeaux de protection visent à réduire le poids des chapeaux de protection par exemple en utilisant des matières plastiques ou en modifiant la structure des chapeaux de protection.In addition, the recent improvements of the protective caps aim at reducing the weight of the protective caps for example by using plastic materials or by modifying the structure of the protective caps.

Par exemple, le brevet français FR3013101 A1 de la présente demanderesse décrit un chapeau de protection 200 fabriqué par moulage d'une résine polymérique de sorte à réduire le poids du chapeau tout en respectant la norme ISO 11117. Ce chapeau de protection 200 est illustré sur la figure 1 de l'état de la technique dans une position de montage sur un col cylindrique 22 d'une bouteille de gaz 21. Il correspond au préambule de la revendication 1.For example, the French patent FR3013101 A1 of the present Applicant discloses a protective cap 200 made by molding a polymeric resin so as to reduce the weight of the cap while complying with the ISO 11117 standard. This protective cap 200 is illustrated in FIG. figure 1 of the state of the art in a mounting position on a cylindrical neck 22 of a gas cylinder 21. It corresponds to the preamble of claim 1.

La bouteille de gaz 21 se compose d'un contenant sous pression conformé avec une partie supérieure habituellement bombée convexe comportant un col cylindrique 22 en saillie et en position centrale. Ce col 22 présente un filetage 23 sur son pourtour latéral. La bouteille de gaz 21 comprend également un robinet 24 solidarisé en position centrale sur la face supérieure du col cylindrique 22. Ce robinet 24 comprend habituellement un volant d'ouverture et de fermeture 25 en partie supérieure et un orifice latéral 26 pour la sortie du gaz et le remplissage de la bouteille de gaz 21. L'orifice latéral 26 s'étend à l'horizontal, perpendiculairement à l'axe vertical du corps du robinet 24. The gas bottle 21 consists of a pressurized container shaped with a generally domed convex upper portion having a cylindrical neck 22 projecting and in a central position. This neck 22 has a thread 23 on its lateral periphery. The gas bottle 21 also comprises a valve 24 secured in a central position on the upper face of the cylindrical neck 22. This valve 24 usually comprises an opening and closing wheel 25 in the upper part and a lateral orifice 26 for the gas outlet and filling the gas bottle 21. The side port 26 extends horizontally, perpendicularly to the vertical axis of the valve body 24.

Le chapeau de protection 200 a notamment pour but de protéger ce robinet 24 afin d'éviter qu'il ne soit détérioré ou arraché en cas de chute ou de choc, et de faciliter la manutention de la bouteille de gaz 21. Le chapeau de protection 200 comprend trois pièces distinctes, à savoir une bague 300, un corps de protection 310 et un contre-écrou 320. La bague 300 présente une ouverture 330 munie d'un filetage 340 complémentaire avec le filetage 23 du col cylindrique 22 de sorte à permettre le vissage de la bague 300 sur le col cylindrique 22. Le contre-écrou 320 présente également une ouverture 350 munie d'un filetage 360 complémentaire avec le filetage 23 du col cylindrique 22 de sorte à permettre un visage du contre-écrou 320 sur le col cylindrique 22. Le corps de protection 310 comporte une embase 400 et une coque annulaire 420 s'étendant depuis l'extrémité radiale de l'embase 400. Protective cap 200 is intended in particular to protect the valve 24 to prevent it from being damaged or torn in case of a fall or shock, and to facilitate the handling of the gas bottle 21. The protective cap 200 comprises three separate parts, namely a ring 300, a protective body 310 and a lock nut 320. The ring 300 has an opening 330 provided with a thread 340 complementary to the thread 23 of the cylindrical neck 22 so as to allow screwing the ring 300 on the cylindrical collar 22. the nut 320 against also has an opening 350 provided with a complementary thread 360 with thread 23 of the cylindrical collar 22 so as to allow a face of the nut 320 against the cylindrical collar 22. the cover body 310 comprises a base 400 and an annular cover 420 extending from the radial end of the base 400.

C'est par l'intermédiaire de la bague 300 et du contre-écrou 320 que le corps de protection 310 du chapeau de protection 200 est solidarisé à la bouteille de gaz 21. A cet effet, l'embase 400 présente une ouverture inférieure 410 destinée à permettre le passage du robinet 24 de la bouteille de gaz 21 et prévue pour être montée par serrage entre la bague 300 et le contre-écrou 320. L'embase 400 s'étend jusqu'à la coque annulaire 420 agencée sur partie de sa périphérie. La première hauteur hl de la coque annulaire 420 est choisie de sorte que, lorsque le chapeau de protection 200 est monté sur la bouteille de gaz 21, la coque annulaire 420 dépasse la hauteur h0 du robinet 24. It is through the ring 300 and against the nut 320 that the protective body 310 of the protective cap 200 is secured to the gas bottle 21. For this purpose, the base 400 has a lower opening 410 intended to allow the passage of the valve 24 of the gas bottle 21 and provided to be mounted by clamping between the ring 300 and the lock nut 320. The base 400 extends to the annular shell 420 arranged on part of its periphery. The first height h1 of the annular shell 420 is chosen so that, when the protective cap 200 is mounted on the gas bottle 21, the annular shell 420 exceeds the height h0 of the valve 24.

En d'autres termes, la première hauteur hl est choisie de manière à être supérieure à la hauteur h0 de l'ensemble formé par le col cylindrique 22 et le robinet 24 de la bouteille de gaz 21 afin de respecter la norme ISO11117.In other words, the first height h1 is chosen to be greater than the height h0 of the assembly formed by the cylindrical neck 22 and the valve 24 of the gas cylinder 21 in order to comply with the ISO11117 standard.

La coque annulaire 420 présente également une première ouverture latérale 440 permettant qu'un automate puisse remplir la bouteille de gaz 21 sans qu'il soit nécessaire de démonter, même partiellement, la coque annulaire 420. Une seconde ouverture latérale 450 est également ménagée dans la coque annulaire 420 de sorte à positionner une poignée 460. The annular shell 420 also has a first lateral opening 440 allowing an automaton to fill the gas bottle 21 without the need to disassemble, even partially, the annular shell 420. A second lateral opening 450 is also provided in the annular shell 420 so as to position a handle 460.

Afin de garantir la résistance mécanique du chapeau de protection 200 au niveau des ouvertures latérales 400, 450, la coque annulaire 420 présente une seconde hauteur h2, supérieure à la première hauteur hl, formant quatre piliers 480 disposés de part et d'autre de chaque ouverture latérale 400, 450. In order to guarantee the mechanical strength of the protective cap 200 at the lateral openings 400, 450, the annular shell 420 has a second height h2, greater than the first height h1, forming four pillars 480 disposed on either side of each lateral opening 400, 450.

En outre, la coque annulaire 420 comporte une structure alvéolaire, telle qu'illustrée sur la figure 2 de l'état de la technique. Cette structure alvéolaire comprend une paroi interne 510 venant de matière avec le bord supérieur de l'embase 400 et une paroi externe 500 reliée à la paroi interne 510 par un rebord supérieur 540 s'étendant radialement entre les parois interne 510 et externe 500. Les alvéoles sont formées entre les parois 510, 500 par des cloisons internes 520. Chaque cloison interne présente une première section 520 s'étendant radialement entre les parois 500, 510 et sur toute la longueur des parois 500, 510. Chaque cloison interne comporte, en outre, une seconde section 530 venant de matière avec la première section 520 et s'étendant sur la face inférieure de l'embase 400. Cette structure alvéolaire permet de limiter le poids du chapeau de protection 200. In addition, the annular shell 420 has a honeycomb structure, as illustrated in FIG. figure 2 of the state of the art. This honeycomb structure comprises an inner wall 510 made of material with the upper edge of the base 400 and an outer wall 500 connected to the inner wall 510 by an upper flange 540 extending radially between the inner walls 510 and outer 500 . cavities are formed between the walls 510, 500 by internal partitions 520. Each internal partition has a first section 520 extending radially between the walls 500, 510 and over the entire length of the walls 500, 510. Each internal partition comprises, in in addition, a second section 530 made of material with the first section 520 and extending on the lower face of the base 400. This honeycomb structure makes it possible to limit the weight of the protective cap 200.

Cependant, la réalisation de cette coque annulaire 420 est généralement effectuée par moulage d'une matière plastique telle qu'une résine polymérique. Le moule présente donc une forme complémentaire à celle de la coque annulaire 420 avec une hauteur plus importante au niveau de la zone de formation des piliers 480 disposés de part et d'autre de chaque ouverture latérale 400, 450. Lors de la réalisation de cette coque annulaire 420, il existe un fort risque de cassure du moule au niveau de la zone de formation des piliers 480 en raison de la pression de la résine, de la hauteur des parties moulantes dans cette région, et de l'augmentation de température sur ces pièces.However, the realization of this annular shell 420 is generally performed by molding a plastic material such as a polymeric resin. The mold thus has a shape complementary to that of the annular shell 420 with a greater height at the level of the formation zone of the pillars 480 disposed on either side of each lateral opening 400, 450. When carrying out this Annular shell 420, there is a high risk of breakage of the mold at the area of formation of the pillars 480 due to the pressure of the resin, the height of the molding parts in this region, and the temperature increase on these parts.

Pour résoudre ce problème de cassure, une solution classique consiste à réduire le temps de réalisation de cette coque annulaire 420 afin de diminuer la température.To solve this breakage problem, a conventional solution is to reduce the time of completion of this annular shell 420 to reduce the temperature.

En d'autres termes, le but de l'invention est d'obtenir un chapeau de protection d'une bouteille de gaz avec un rapport satisfaisant entre le poids et la résistance tout en limitant le risque de cassure du moule d'injection et le temps de réalisation du chapeau de protection.In other words, the object of the invention is to obtain a protective cap of a gas cylinder with a satisfactory ratio between the weight and the resistance while limiting the risk of breakage of the injection mold and the time of realization of the protective cap.

EXPOSE DE L'INVENTIONSUMMARY OF THE INVENTION

L'invention propose de résoudre ce problème au moyen d'un chapeau de protection dont la longueur de la cloison interne positionnée au niveau d'un pilier est réduite. Il s'ensuit que le moule présente une continuité de matière entre l'élément formant le pilier et l'élément formant l'alvéole directement à proximité de cet élément formant le pilier. La résistance du moule est ainsi améliorée.The invention proposes to solve this problem by means of a protective cap whose length of the internal partition positioned at a pillar is reduced. It follows that the mold has a continuity of material between the element forming the pillar and the element forming the cell directly in the vicinity of this element forming the pillar. The resistance of the mold is thus improved.

A cet effet, selon un premier aspect, l'invention concerne un chapeau de protection d'une bouteille de gaz comportant une embase comportant une ouverture destinée à être fixée à un col cylindrique d'une bouteille de gaz, et une coque annulaire s'étendant depuis l'extrémité radiale de l'embase et présentant une première hauteur, la coque annulaire étant configurée pour entourer un robinet d'une bouteille de gaz sur toute sa hauteur. La coque annulaire présente au moins une ouverture latérale configurée pour permettre un accès latéral à un orifice latéral du robinet de la bouteille de gaz sans démonter la coque annulaire et/ou pour permettre le montage d'une poignée. De plus, la coque annulaire comporte une structure alvéolaire formée par deux parois reliées par des cloisons internes s'étendant radialement entre les parois. La coque annulaire présente une seconde hauteur, supérieure à la première hauteur, formant au moins un pilier au niveau d'une extrémité terminale débouchant sur l'au moins une ouverture latérale.For this purpose, according to a first aspect, the invention relates to a protective cap of a gas cylinder having a base having an opening for attachment to a cylindrical neck of a gas cylinder, and an annular shell extending from the radial end of the base and having a first height, the annular shell being configured to surround a valve of a gas cylinder over its entire height. The annular shell has at least one lateral opening configured to allow lateral access to a lateral orifice of the gas cylinder valve without disassembling the annular shell and / or to allow mounting of a handle. In addition, the annular shell comprises a honeycomb structure formed by two walls connected by internal partitions extending radially between the walls. The annular shell has a second height, greater than the first height, forming at least one pillar at an end end opening on the at least one lateral opening.

Le chapeau de l'invention se caractérise en ce que la cloison interne de la structure alvéolaire la plus proche du pilier s'étend sur une partie seulement de la première hauteur de la coque annulaire.The cap of the invention is characterized in that the inner wall of the honeycomb structure closest to the pillar extends over only a portion of the first height of the annular shell.

L'invention permet ainsi d'améliorer la solidité du moule destiné à fabriquer le chapeau de protection particulièrement au niveau de la zone de forme du pilier.The invention thus makes it possible to improve the strength of the mold intended to manufacture the protective cap, particularly at the level of the pillar shape zone.

En outre, l'invention ne modifie pas la structure des autres cloisons internes et permet de conserver un rapport satisfaisant entre le poids et la résistance du chapeau de protection. Il est également possible de constater que ce retrait de matière permet d'augmenter l'élasticité de la coque annulaire au niveau du pilier améliorant ainsi la résistance aux chocs dans cette région.In addition, the invention does not modify the structure of the other internal partitions and allows to maintain a satisfactory ratio between the weight and the resistance of the protective cap. It is also possible to note that this removal of material makes it possible to increase the elasticity of the annular shell at the level of the pillar thus improving the impact resistance in this region.

Selon un mode de réalisation particulier, le chapeau de protection comporte également une bague comportant sur sa face latérale interne un filetage destiné à coopérer avec un filetage d'une bouteille de gaz, et des moyens de liaison entre l'embase et la bague. En variante, l'embase peut comporter un filetage destiné à coopérer directement avec un filetage d'une bouteille de gaz sans changer l'invention.According to a particular embodiment, the protective cap also comprises a ring having on its internal lateral face a thread intended to cooperate with a thread of a gas bottle, and connection means between the base and the ring. Alternatively, the base may comprise a thread intended to cooperate directly with a thread of a gas cylinder without changing the invention.

Certaines bouteilles de gaz comportent un cordon de soudure positionné à proximité du col cylindrique portant le robinet. Il s'ensuit que la bague peut reposer sur ce cordon de soudure lorsqu'elle est vissée sur le col cylindrique. Or, les cordons de soudure ont généralement des surfaces dont la planéité n'est pas garantie et l'appui de la bague sur cette surface peut induire un décalage de la bague dans le pas de vis du filetage du col cylindrique. Ainsi, la bague risque de supporter des efforts importants au moment du serrage des différents éléments et d'engendrer une mauvaise position du chapeau de protection, qui peut conduire à la casse de la bague.Some gas cylinders have a weld seam positioned near the cylindrical neck bearing the faucet. It follows that the ring can rest on this weld bead when it is screwed on the cylindrical neck. However, the weld beads generally have surfaces whose flatness is not guaranteed and the support of the ring on this surface can induce a shift of the ring in the thread of the thread of the cylindrical neck. Thus, the ring may withstand significant forces when tightening the various elements and cause a bad position of the protective cap, which can lead to the breakage of the ring.

Selon un mode de réalisation avantageux, la face inférieure de la bague comporte une nervure concentrique s'étendant depuis son diamètre interne et configurée pour former une butée, la bague étant destinée à être vissée sur une bouteille de gaz jusqu'à ce que la nervure bute contre la paroi supérieure de la bouteille de gaz. Ce mode de réalisation permet ainsi d'empêcher l'appui de la bague sur le cordon de soudure positionné à proximité du col cylindrique en utilisant une surface d'appui disposée sous la bague.According to an advantageous embodiment, the lower face of the ring comprises a concentric rib extending from its internal diameter and configured to form a stop, the ring being intended to be screwed onto a gas cylinder until the rib abuts against the top wall of the gas cylinder. This embodiment thus makes it possible to prevent the support of the ring on the weld bead positioned near the cylindrical neck by using a bearing surface disposed under the ring.

Selon un mode de réalisation, la bague comporte un arrêt en fond de filet configuré pour former une butée, la bague étant destinée à être vissée sur une bouteille de gaz jusqu'à ce que le filetage de la bouteille de gaz butte contre l'arrêt en fond de filet.According to one embodiment, the ring comprises a stop at the bottom of the thread configured to form a stop, the ring being intended to be screwed onto a gas bottle until the thread of the gas cylinder abuts against the stop at the bottom of the net.

La hauteur du robinet d'une bouteille de gaz peut varier. Ainsi, certains robinets dépassent du chapeau et ne sont pas protégés à leurs extrémités supérieures. En outre, il n'est pas possible d'augmenter la hauteur du corps du chapeau car certains espaces de stockage sont dimensionnés en hauteur pour recevoir des bouteilles de gaz munies d'un chapeau avec une hauteur prédéterminée. Il existe donc un besoin de protection de l'extrémité supérieure d'une bouteille de gaz munie d'un robinet de grande hauteur.The height of the valve of a gas cylinder may vary. Thus, some valves protrude from the cap and are not protected at their upper ends. In addition, it is not possible to increase the height of the hat body because some storage spaces are dimensioned in height to receive gas bottles with a cap with a predetermined height. There is therefore a need for protection of the upper end of a gas cylinder provided with a high valve.

Ce mode de réalisation permet de résoudre ce problème à l'aide d'un chapeau multi-taille dont le corps présente une hauteur constante et destiné à venir en butée sur le filetage du robinet au lieu de buter contre la paroi supérieure de la bouteille de gaz.This embodiment solves this problem using a multi-size hat whose body has a constant height and intended to abut on the thread of the valve instead of abutting against the top wall of the bottle. gas.

Il en résulte qu'il peut exister un espace entre la paroi supérieure de la bouteille de gaz et l'extrémité inférieure du chapeau mais le risque de dégradation du robinet sur cet espace est inférieur au risque de dégradation de l'extrémité supérieure du robinet lorsque le robinet dépasse du chapeau.As a result, there may be space between the upper wall of the gas cylinder and the lower end of the cap, but the risk of deterioration of the valve on this space is less than the risk of degradation of the upper end of the valve when the tap protrudes from the hat.

En variante, la bague comporte un épaulement disposé au niveau de sa face supérieure et s'étendant radialement depuis le diamètre interne vers le centre de la bague, l'épaulement étant configuré pour former une butée de support, la bague étant destinée à être vissée sur une bouteille de gaz jusqu'à ce que la face supérieure d'un col cylindrique de la bouteille de gaz butte contre l'épaulement.Alternatively, the ring has a shoulder disposed at its upper face and extending radially from the inner diameter to the center of the ring, the shoulder being configured to form a bearing abutment, the ring being intended to be screwed on a gas bottle until the top face of a cylindrical neck of the gas cylinder mounts against the shoulder.

Selon un mode de réalisation particulier, la bague comporte sur sa face latérale externe des structures de positionnement, en particulier des nervures verticales qui, en combinaison avec des structures de positionnement complémentaires que présente l'embase, en particulier sur sa face latérale interne, permettent le positionnement souhaité de l'ouverture latérale, tout en empêchant la rotation de l'embase par rapport à la bague lorsqu'elles sont mutuellement engagées. Ce mode de réalisation permet de positionner l'orifice latéral du robinet de la bouteille en face d'une ouverture latérale du chapeau de protection.According to a particular embodiment, the ring comprises on its external lateral face positioning structures, in particular vertical ribs which, in combination with complementary positioning structures that the base, in particular on its internal lateral face, allow the desired positioning of the lateral opening, while preventing the rotation of the base relative to the ring when they are mutually engaged. This embodiment makes it possible to position the lateral orifice of the valve of the bottle in front of a lateral opening of the protective cap.

Avantageusement, la bague de serrage présente un rebord inférieur s'étendant sensiblement horizontalement vers l'extérieur. Dans ces conditions, la face supérieure du rebord est également munie de structures de positionnement qui coopèrent avec des structures correspondantes agencées sur le pourtour inférieur de l'embase.Advantageously, the clamping ring has a lower rim extending substantially horizontally outwards. Under these conditions, the upper face of the flange is also provided with positioning structures which cooperate with corresponding structures arranged on the lower periphery of the base.

Selon un premier mode de réalisation, les moyens de liaison entre l'embase et la bague sont réalisés par des ergots déformables que comporte avantageusement la face interne dans l'ouverture latérale de l'embase coopérant avec des logements que comporte de préférence la face latérale externe de la bague.According to a first embodiment, the connecting means between the base and the ring are formed by deformable lugs which advantageously comprises the internal face in the lateral opening of the base cooperating with housings that preferably comprises the side face outer ring.

Les ergots s'étendent en biais dans le sens de montage de l'embase dans la bague de sorte à permettre une déformation des ergots lors du montage de l'embase jusqu'à ce que les ergots pénètrent dans les logements, les ergots reprenant alors leurs formes initiales de sorte à bloquer le retrait de l'embase de la bague. Ce mode de réalisation permet un montage particulièrement rapide par clipsage entre l'embase et la bague.The lugs extend obliquely in the mounting direction of the base in the ring so as to allow deformation of the lugs during assembly of the base until the lugs enter the housing, the lugs then taking their initial shapes so as to block the withdrawal of the base of the ring. This embodiment allows a particularly fast mounting by clipping between the base and the ring.

Selon un second mode de réalisation, les moyens de liaison entre l'embase et la bague sont réalisés avec un contre-écrou présentant une ouverture munie d'un filetage complémentaire avec au filetage d'un col cylindrique d'une bouteille de gaz, le contre-écrou étant configuré pour être vissé sur un filetage d'une bouteille de gaz de sorte à enserrer l'embase entre la bague et le contre-écrou. Ce mode de réalisation permet d'assurer un montage solide et réversible entre l'embase et la bague.According to a second embodiment, the connection means between the base and the ring are made with a counter nut having an opening provided with a complementary thread with the thread of a cylindrical neck of a gas cylinder, the against-nut being configured to be screwed on a thread of a gas cylinder so as to grip the base between the ring and the lock nut. This embodiment ensures a solid and reversible mounting between the base and the ring.

Avantageusement, le contre-écrou présente des structures de préhension s'étendant transversalement dans le contre-écrou et configurés pour permettre aux doigts d'un outil d'entrainer le contre-écrou en rotation pour monter et/ou démonter le chapeau de protection sur une bouteille de gaz, le contre-écrou présentant également une gorge disposée sur le dessus du contre-écrou de sorte à guider les déplacements de l'outil lors d'une phase d'accouplement entre les doigts et les alésages. Lors du positionnement des doigts de l'outil dans les structures de préhension, l'outil peut être en rotation risquant ainsi d'usiner la face supérieure du contre-écrou.Advantageously, the lock nut has gripping structures extending transversely in the locknut and configured to allow the fingers of a tool to drive the counter-nut in rotation to mount and / or disassemble the protective cap on a gas cylinder, the lock nut also having a groove disposed on the top of the locknut so as to guide the movements of the tool during a coupling phase between the fingers and the bores. When positioning the fingers of the tool in the gripping structures, the tool can be rotated thereby causing the upper face of the locknut to be machined.

Ce mode de réalisation permet de guider des déplacements des doigts de l'outil dans la gorge de sorte à permettre une coopération rapide entre les doigts et les structures de préhension. Il s'ensuit que le risque d'usinage de la face supérieure du contre-écrou est réduit.This embodiment makes it possible to guide movements of the fingers of the tool in the groove so as to allow rapid cooperation between the fingers and the gripping structures. It follows that the risk of machining the upper face of the lock nut is reduced.

Selon un aspect qui ne fait pas partie de l'invention, il existe un outil de montage d'un chapeau de protection tel que précédemment décrit, l'outil comportant une embase munie de doigts, adaptée au diamètre d'un contre-écrou d'un chapeau de protection, un corps partiellement cylindrique dont le diamètre est supérieur à celui de l'embase de sorte à entourer un robinet dont l'orifice latéral s'étend au-delà du col cylindrique d'une bouteille de gaz, et une ouverture ménagée dans le corps et dans l'embase de sorte à permettre le positionnement de l'outil sur un contre-écrou par translation verticale malgré la présence de l'orifice latéral.According to an aspect which is not part of the invention, there is a tool for mounting a protective cap as previously described, the tool comprising a base provided with fingers, adapted to the diameter of a lock nut of a protective cap, a partially cylindrical body whose diameter is greater than that of the base so as to surround a valve whose lateral orifice extends beyond the cylindrical neck of a gas cylinder, and a opening in the body and in the base so as to allow the positioning of the tool on a counter nut by vertical translation despite the presence of the lateral orifice.

Selon un troisième aspect, l'invention concerne une bouteille de gaz comprenant un chapeau de protection selon le premier aspect de l'invention.According to a third aspect, the invention relates to a gas cylinder comprising a protective cap according to the first aspect of the invention.

DESCRIPTION SOMMAIRE DES FIGURESSUMMARY DESCRIPTION OF THE FIGURES

Les manières de réaliser l'invention, ainsi que les avantages qui en découlent, ressortiront bien de la description des modes de réalisation qui suivent, à l'appui des figures annexées dans lesquelles :

  • la figure 1 est une vue en perspective des éléments constitutifs du chapeau de protection selon l'invention représentés dissociés en position de montage sur une bouteille de gaz selon l'état de la technique ;
  • la figure 2 est une vue en perspective de dessous du corps de protection de la figure 1 selon l'état de la technique ;
  • la figure 3 est une vue en perspective de dessous d'un corps de protection d'un chapeau de protection selon un premier mode de réalisation de l'invention ;
  • la figure 4 est une vue en perspective de dessous d'une bague d'un chapeau de protection selon le premier mode de réalisation de l'invention ;
  • la figure 5 est une vue en perspective de dessus d'un contre-écrou d'un chapeau de protection selon le premier mode de réalisation de l'invention ;
  • la figure 6 est une vue en perspective de dessus d'un outil selon un aspect qui ne fait pas partie de l'invention ;
  • la figure 7 est une vue en perspective de dessous de l'outil de la figure 6 ;
  • la figure 8 est une vue en coupe de dessus d'un corps de protection et d'une bague en position de montage selon un second mode de réalisation de l'invention ; et
  • la figure 9 est une vue en coupe de dessus du corps de protection assemblé avec la bague de la figure 8.
The ways of carrying out the invention, as well as the advantages which result therefrom, will emerge from the description of the embodiments which follow, in support of the appended figures in which:
  • the figure 1 is a perspective view of the constituent elements of the protective cap according to the invention shown dissociated in mounting position on a gas cylinder according to the state of the art;
  • the figure 2 is a perspective view from below of the protective body of the figure 1 according to the state of the art;
  • the figure 3 is a perspective view from below of a protective body of a protective cap according to a first embodiment of the invention;
  • the figure 4 is a perspective view from below of a ring of a protective cap according to the first embodiment of the invention;
  • the figure 5 is a perspective view from above of a locknut of a protective cap according to the first embodiment of the invention;
  • the figure 6 is a perspective view from above of a tool in an aspect that does not form part of the invention;
  • the figure 7 is a perspective view from below of the tool of the figure 6 ;
  • the figure 8 is a sectional view from above of a protective body and a ring in mounting position according to a second embodiment of the invention; and
  • the figure 9 is a sectional view from above of the protective body assembled with the ring of the figure 8 .

Les éléments équivalents représentés sur les différentes figures porteront les mêmes références numériques.The equivalent elements represented in the different figures will bear the same numerical references.

DESCRIPTION DETAILLEE DE L'INVENTIONDETAILED DESCRIPTION OF THE INVENTION

Comme déjà exposé ci-dessus, l'invention concerne un chapeau de protection 20 pour bouteille de gaz 21, respectant la norme ISO11117, tout en limitant le risque de cassure du moule de fabrication.As already explained above, the invention relates to a protective cap 20 for a gas bottle 21, complying with the ISO11117 standard, while limiting the risk of breakage of the manufacturing mold.

Le chapeau de protection 20 va maintenant être décrit de façon détaillée en référence aux figures 3 à 5, qui représentent un premier exemple non limitatif de réalisation de l'invention.The protective cap 20 will now be described in detail with reference to the Figures 3 to 5 , which represent a first nonlimiting embodiment of the invention.

Le chapeau de protection 20 est prévu pour être fixé sur une bouteille de gaz 21 telle qu'illustrée sur la figure 1 de l'état de la technique. Dans la suite de cette description, les notions de haut, de bas, d'inférieur et de supérieur sont définies en fonction de l'orientation adoptée par le chapeau de protection 20 lorsque celui-ci est monté sur une bouteille de gaz 21 en position droite telle qu'illustré sur la figure 1 de l'état de la technique. Il est évident que la bouteille de gaz 21 peut être stockée ou positionnée différemment, par exemple avec la tête en bas, les notions de haut, de bas, d'inférieur et de supérieur du chapeau de protection 20 sont à modifier en conséquence.The protective cap 20 is intended to be attached to a gas cylinder 21 as illustrated in FIG. figure 1 of the state of the art. In the rest of this description, the notions of top, bottom, bottom and top are defined according to the orientation adopted by the protective cap 20 when it is mounted on a gas cylinder 21 in position right as illustrated on the figure 1 of the state of the art. It is obvious that the gas bottle 21 can be stored or positioned differently, for example with the head down, the notions of top, bottom, bottom and top of the protective cap 20 are to be modified accordingly.

Une bouteille de gaz 21 se compose d'un contenant sous pression conformé avec une partie supérieure habituellement bombée convexe comportant un col cylindrique 22 en saillie et en position centrale. Ce col 22 présente un filetage 23 sur son pourtour latéral. La bouteille de gaz 21 comprend également un robinet 24 solidarisé en position centrale sur la face supérieure du col cylindrique 22. Ce robinet 24 comprend habituellement un volant d'ouverture et de fermeture 25 en partie supérieure et un orifice latéral 26 pour la sortie du gaz et le remplissage de la bouteille de gaz 21. L'orifice latéral 26 s'étend à l'horizontal, perpendiculairement à l'axe vertical du corps du robinet 24. A gas bottle 21 consists of a pressurized container shaped with a generally domed convex upper portion having a cylindrical neck 22 projecting and in a central position. This neck 22 has a thread 23 on its lateral periphery. The gas bottle 21 also comprises a valve 24 secured in a central position on the upper face of the cylindrical neck 22. This valve 24 usually comprises an opening and closing wheel 25 in the upper part and a lateral orifice 26 for the gas outlet and filling the gas bottle 21. The side port 26 extends horizontally, perpendicularly to the vertical axis of the valve body 24.

Le chapeau de protection 20 a notamment pour but de protéger ce robinet 24 afin d'éviter qu'il ne soit détérioré ou arraché en cas de chute ou de choc, et de faciliter la manutention de la bouteille de gaz 21. Le chapeau de protection 20 peut être réalisé dans une seule pièce. De préférence, le chapeau de protection 20 comprend au moins deux pièces distinctes, à savoir une bague 30 et un corps de protection 31. Le corps de protection 31 comporte une embase 40 et une coque annulaire 42 s'étendant depuis l'extrémité radiale de l'embase 40. C'est par l'intermédiaire de l'embase 40 que le corps de protection 31 du chapeau de protection 20 est solidarisé à la bouteille de gaz 21. A cet effet, l'embase 40 présente une ouverture inférieure 41 destinée à permettre le passage du robinet 24 de la bouteille de gaz 21. L'embase 40 s'étend jusqu'à la coque annulaire 42 agencée sur partie de sa périphérie. La première hauteur hl de la coque annulaire 42 est choisie de sorte que, lorsque le chapeau de protection 20 est monté sur la bouteille de gaz 21, la coque annulaire 42 dépasse la hauteur h0 du robinet 24. The protective cap 20 is intended in particular to protect the valve 24 to prevent it from being damaged or torn in the event of a fall or shock, and to facilitate the handling of the gas bottle 21. The protective cap 20 can be made in one piece. Preferably, the protective cap 20 comprises at least two separate parts, namely a ring 30 and a protective body 31. The protective body 31 comprises a base 40 and an annular shell 42 extending from the radial end of the base 40. It is through the base 40 that the protective body 31 of the protective cap 20 is secured to the gas bottle 21. For this purpose, the base 40 has a lower opening 41 intended to allow the passage of the valve 24 of the gas bottle 21. The base 40 extends to the annular shell 42 arranged on part of its periphery. The first height h1 of the annular shell 42 is chosen so that, when the protective cap 20 is mounted on the gas bottle 21, the annular shell 42 exceeds the height h0 of the valve 24.

La coque annulaire 42 présente également une première ouverture latérale 44 permettant qu'un automate puisse remplir la bouteille de gaz 21 sans qu'il soit nécessaire de démonter même partiellement la coque annulaire 42. The annular shell 42 also has a first lateral opening 44 allowing an automaton to fill the gas bottle 21 without it being necessary to dismantle the annular shell 42 even partially .

Une seconde ouverture latérale 45 est également ménagée dans la coque annulaire 42 de sorte à positionner une poignée 46. Afin de garantir la résistance mécanique du chapeau de protection 20 au niveau des ouvertures latérales 40, 45, la coque annulaire 42 présente une seconde hauteur h2, supérieure à la première hauteur hl, formant quatre piliers 48 disposés de part et d'autre de chaque ouverture latérale 40, 45. A second lateral opening 45 is also formed in the annular shell 42 so as to position a handle 46. In order to guarantee the mechanical strength of the protective cap 20 at the lateral openings 40, 45, the annular shell 42 has a second height h2 , greater than the first height h1, forming four pillars 48 arranged on either side of each lateral opening 40, 45.

La première hauteur hl est mesurable entre l'extrémité inférieure de l'embase 40 et l'extrémité supérieure normale de la coque annulaire 42, c'est à dire au niveau de l'extrémité de la coque annulaire 42 en dehors des piliers 48. La première hauteur hl est choisie de manière à être supérieure à la hauteur h0 de l'ensemble formé par le col cylindrique 22 et le robinet 24 de la bouteille de gaz 21 afin de respecter la norme ISO11117. La seconde hauteur h2 est mesurable entre l'extrémité inférieure de l'embase 40 et l'extrémité supérieure de la coque annulaire 42 au niveau des piliers 48. Par exemple, la hauteur hl de la coque annulaire 42 peut être comprise entre 80 et 90 mm alors que la hauteur h2 peut être comprise entre 90 et 102 mm.The first height h1 is measurable between the lower end of the base 40 and the normal upper end of the annular shell 42, that is to say at the end of the annular shell 42 outside the pillars 48. The first height h1 is chosen to be greater than the height h0 of the assembly formed by the cylindrical neck 22 and the valve 24 of the gas cylinder 21 in order to comply with the ISO11117 standard. The second height h2 is measurable between the lower end of the base 40 and the upper end of the annular shell 42 at the level of the pillars 48. For example, the height h1 of the annular shell 42 can be between 80 and 90 mm while the height h2 can be between 90 and 102 mm.

En outre, la coque annulaire 42 comporte une structure alvéolaire comprenant une paroi interne 51 venant de matière avec le bord supérieur de l'embase 40 et une paroi externe 50 reliée à la paroi interne 51 par un rebord supérieur 54 s'étendant radialement entre les parois interne 51 et externe 50. Les alvéoles sont formées entre les deux parois 51, 50 par des cloisons internes 52. Chaque cloison interne 52 présente une première section 53 s'étendant radialement sur la face inférieure de l'embase 40 et une seconde section 55 venant de matière avec la première section 53 et s'étendant radialement entre les parois 50, 51 et dans la profondeur des parois 50, 51 sur toute la hauteur hl. C'est le cas de toutes les cloisons internes en dehors d'une de celles présentes à proximité des piliers 48. Cette structure alvéolaire permet de limiter le poids du chapeau de protection 20 tout en conférant une résistance mécanique satisfaisante.In addition, the annular shell 42 comprises a honeycomb structure comprising an inner wall 51 made of material with the upper edge of the base 40 and an outer wall 50 connected to the inner wall 51 by an upper flange 54 extending radially between the internal walls 51 and outer 50. The cells are formed between the two walls 51, 50 by internal partitions 52. Each inner partition 52 has a first section 53 extending radially on the lower face of the base 40 and a second section 55 coming from material with the first section 53 and extending radially between the walls 50, 51 and in the depth of the walls 50, 51 over the entire height hl. This is the case of all internal partitions outside one of those present near the pillars 48. This honeycomb structure allows to limit the weight of the protective cap 20 while conferring a satisfactory mechanical strength.

Selon l'invention, au moins une cloison interne 52 la plus proche du pilier 48 s'étend sur une partie seulement de la première hauteur hl de la coque annulaire 42. According to the invention, at least one inner partition 52 closest to the pillar 48 extends over only a portion of the first height h1 of the annular shell 42.

Ainsi, dans les zones Z1 et Z2 illustrées sur la figure 3, la cloison interne 52 entre les deux parois 50, 51 est dépourvue de matière. Il s'ensuit que la première section 53 de la cloison interne 52 la plus proche de l'ouverture 45 s'étend jusqu'au bord de l'embase 40 et ne s'étend pas jusqu'à la seconde section 55 de la cloison interne. En pratique, la hauteur de la seconde section 55 peut être comprise entre 0 et 60% de la hauteur hl des parois 50, 51 en fonction des caractéristiques techniques recherchées.Thus, in zones Z1 and Z2 illustrated on the figure 3 , the inner partition 52 between the two walls 50, 51 is devoid of material. It follows that the first section 53 of the inner partition 52 closest to the opening 45 extends to the edge of the base 40 and does not extend to the second section 55 of the partition internal. In practice, the height of the second section 55 may be between 0 and 60% of the height h1 of the walls 50, 51 according to the desired technical characteristics.

La seconde section 55 ainsi réduite peut constituer un montant du pilier 48 ou s'étendre entre les deux parois 50, 51 directement à proximité du pilier 48. Dans l'exemple de la figure 3, les cloisons internes 52 présentes dans les zones Z1 et Z2 constituent une délimitation des piliers 48 entourant l'ouverture 45 par rapport aux autres alvéoles ménagées entre les parois 50, 51 par les cloisons internes 52. The second section 55 thus reduced may constitute an amount of the pillar 48 or extend between the two walls 50, 51 directly near the pillar 48. In the example of the figure 3 , the internal partitions 52 present in the zones Z1 and Z2 constitute a delimitation of the pillars 48 surrounding the opening 45 relative to the other cells formed between the walls 50, 51 by the internal partitions 52.

Au contraire, la zone Z3 présente une cloison interne 52 s'étendant directement à proximité du pilier 48 délimitant l'ouverture 44. Tout ou partie des cloisons internes 52 les plus proches des piliers 48 peuvent être réduites. En effet, dans l'exemple de la figure 3, les cloisons internes 52 les plus proches des piliers 48 entourant l'ouverture 45 sont réduites (zones Z1 et Z2) alors que les cloisons internes 52 les plus proches des piliers 48 entourant l'ouverture 44 ne sont pas réduites (zone Z3).On the contrary, the zone Z3 has an internal partition 52 extending directly near the pillar 48 defining the opening 44. All or part of the internal partitions 52 closest to the pillars 48 can be reduced. Indeed, in the example of figure 3 , the internal partitions 52 closest to the pillars 48 surrounding the opening 45 are reduced (zones Z1 and Z2) while the internal partitions 52 closest to the pillars 48 surrounding the opening 44 are not reduced (zone Z3).

De préférence, les cloisons internes 52 qui constituent une délimitation des piliers 48 sont réduites car leur réduction améliore grandement la solidité du moule permettant de réaliser le corps de protection 31. Preferably, the internal partitions 52 which constitute a delimitation of the pillars 48 are reduced because their reduction greatly improves the strength of the mold for making the protective body 31.

Le chapeau de protection 20 est fabriqué de préférence en une résine polymérique. Il s'ensuit que le moule destiné à fabriquer le corps de protection 31 est soumis à la pression de la résine lors de la réalisation du corps de protection 31. L'invention permet de renforcer les éléments du moule destinés à former les piliers 48 entourant l'ouverture 45. The protective cap 20 is preferably made of a polymeric resin. It follows that the mold intended to manufacture the protective body 31 is subjected to the pressure of the resin during the production of the protective body 31. The invention makes it possible to reinforce the elements of the mold intended to form the pillars 48 surrounding the opening 45.

L'embase 40 du corps de protection 31 présente une ouverture centrale 41 destinée à coopérer avec la bague 30 vissée sur le col cylindrique 22 d'une bouteille de gaz 21. A cet effet, tel qu'illustré sur la figure 4, la bague 30 présente une ouverture 33 munie d'un filetage 34 complémentaire du filetage 23 du col cylindrique 22 de sorte à permettre un vissage de la bague 30 sur le col cylindrique 22. The base 40 of the protection body 31 has a central opening 41 intended to cooperate with the ring 30 screwed onto the cylindrical neck 22 of a gas cylinder 21. For this purpose, as shown in FIG. figure 4 , the ring 30 has an opening 33 provided with a thread 34 complementary to the thread 23 of the cylindrical neck 22 so as to allow screwing of the ring 30 on the cylindrical neck 22.

En outre, pour permettre de positionner correctement l'ouverture latérale 44 du chapeau 20 et empêcher la rotation du corps de protection 31 par rapport à la bague 30 (non représentées), l'embase 40 et la bague 30 comportent des structures de positionnement complémentaires. Par exemple, ces structures complémentaires peuvent être réalisées sous la forme de nervures verticales situées sur la face externe de la bague 30 et qui s'étendent sur un rebord horizontal de la bague 30. L'embase 40 présente des nervures complémentaires 62 situées sur la face interne de son ouverture centrale 41 et qui s'étendent sous l'embase 40. Ces nervures complémentaires, lorsqu'elles sont mutuellement engagées, empêchent la rotation du corps de protection 31 par rapport à la bague 30. In addition, to allow correct positioning of the lateral opening 44 of the cap 20 and preventing the rotation of the protective body 31 relative to the ring 30 (not shown), the base 40 and the ring 30 comprise complementary positioning structures . For example, these complementary structures can be made in the form of vertical ribs located on the outer face of the ring 30 and which extend on a horizontal rim of the ring 30. The base 40 has complementary ribs 62 located on the internal face of its central opening 41 and which extend under the base 40. These complementary ribs, when mutually engaged, prevent the rotation of the protective body 31 with respect to the ring 30.

Lorsque la bague 30 a été immobilisée sur le col cylindrique 22 de la bouteille de gaz 21, le corps de protection 31 est positionné de sorte à ce que l'ouverture latérale 44 soit située en face de l'orifice latéral 26 du robinet 24. When the ring 30 has been immobilized on the cylindrical neck 22 of the gas bottle 21, the protective body 31 is positioned so that the lateral opening 44 is situated in front of the lateral orifice 26 of the valve 24.

La bague 30 peut également comporter une nervure concentrique 60 s'étendant depuis le diamètre interne et positionnée sous la face inférieure de la bague 30. Cette nervure 60 permet de constituer une butée sur le haut de la bouteille de gaz 21 de sorte à empêcher l'appui de la bague 30 sur un cordon de soudure disposé à proximité du col cylindrique 22 au regard de la bague 30 entre la nervure 60 et le diamètre externe de ladite bague 30. The ring 30 may also comprise a concentric rib 60 extending from the internal diameter and positioned under the lower face of the ring 30. This rib 60 serves to form a stop on the top of the gas bottle 21 so as to prevent the support of the ring 30 on a weld bead disposed near the cylindrical neck 22 facing the ring 30 between the rib 60 and the outer diameter of said ring 30.

La hauteur du robinet 24 d'une bouteille de gaz 21 peut varier. Ainsi, certains robinets 24 dépassent du chapeau et ne sont pas protégés à leurs extrémités supérieures. En outre, il n'est pas possible d'augmenter la hauteur du corps de protection 31 du chapeau de protection 20 car certains espaces de stockage sont dimensionnés en hauteur pour recevoir des bouteilles de gaz munies d'un chapeau de protection 20 avec une hauteur prédéterminée. Il existe donc un besoin de protection de l'extrémité supérieure d'une bouteille de gaz 21 munie d'un robinet 24 de grande hauteur.The height of the valve 24 of a gas cylinder 21 may vary. Thus, some valves 24 protrude from the cap and are not protected at their upper ends. In addition, it is not possible to increase the height of the protective body 31 of the protective cap 20 because some storage spaces are dimensioned in height to receive gas cylinders provided with a protective cap 20 with a height predetermined. There is therefore a need for protection of the upper end of a gas cylinder 21 provided with a valve 24 of great height.

Pour répondre à cette contrainte, la bague 30 peut comporter un arrêt en fond de filet configuré pour former une butée. La bague 30 est alors vissée sur une bouteille de gaz 21 jusqu'à ce que le filetage 23 de la bouteille de gaz 21 butte contre l'arrêt en fond de filet.To meet this constraint, the ring 30 may comprise a stop at the bottom of the thread configured to form a stop. The ring 30 is then screwed onto a gas bottle 21 until the thread 23 of the gas bottle 21 abuts against the stop at the bottom of the net.

En variante, la bague 30 comporte un épaulement disposé au niveau de sa face supérieure et s'étendant radialement depuis son diamètre interne vers le centre de la bague 30, l'épaulement étant configuré pour former une butée de support. La bague est alors vissée sur une bouteille de gaz 21 jusqu'à ce que la face supérieure du col cylindrique 22 de la bouteille de gaz 21 butte contre l'épaulement.Alternatively, the ring 30 has a shoulder disposed at its upper face and extending radially from its inner diameter towards the center of the ring 30, the shoulder being configured to form a support abutment. The ring is then screwed onto a gas bottle 21 until the upper face of the cylindrical neck 22 of the gas bottle 21 abuts against the shoulder.

La fixation du corps de protection 31 sur la bague 30 peut être effectuée de plusieurs manières.The fixing of the protective body 31 on the ring 30 can be effected in several ways.

Selon une première variante de fixation, la hauteur globale de la bague 30 est inférieure à celle du col cylindrique 22 de la bouteille de gaz 21 de sorte que, lorsque la bague 30 est vissée sur le filetage 23 de la bouteille de gaz 21, une partie de ce filetage 23 se prolonge en saillie au-dessus de la bague 30. According to a first fixing variant, the overall height of the ring 30 is less than that of the cylindrical neck 22 of the gas bottle 21 so that, when the ring 30 is screwed onto the thread 23 of the gas bottle 21, a part of this thread 23 extends projecting above the ring 30.

Une fois positionnée sur la bague 30, le corps de protection 31 est immobilisé en position par le vissage d'un contre-écrou 32, illustré sur la figure 5, sur la partie en saillie du filetage 23 situé au-dessus de la bague 30. L'embase 40 est alors prise en sandwich entre la bague 30 et le contre-écrou 32. Once positioned on the ring 30, the protective body 31 is immobilized in position by the screwing of a counter-nut 32, illustrated in FIG. figure 5 on the protruding portion of the thread 23 located above the ring 30. The base 40 is then sandwiched between the ring 30 and the locknut 32.

En pratique, l'embase 40 présente, au niveau de sa face supérieure, une gorge prévue pour loger le contre-écrou 32 lorsque celui-ci est vissé sur la partie supérieure du filetage 23 du col cylindrique 22. Le contre-écrou 32 présente une ouverture 35 munie d'un filetage 36 complémentaire avec le filetage 23 du col cylindrique 22 de sorte à permettre un vissage du contre-écrou 32 sur le col cylindrique 22. In practice, the base 40 has, at its upper face, a groove provided for housing the locknut 32 when it is screwed onto the upper part of the thread 23 of the cylindrical neck 22. The lock nut 32 presents an opening 35 provided with a threading 36 complementary to the thread 23 of the cylindrical neck 22 so as to allow screwing of the counter nut 32 on the cylindrical neck 22.

La bague 30 et le contre-écrou 32 comportent chacun des structures de préhension, respectivement 61 et 62, par exemple sous la forme d'orifices comme cela est représenté sur les figures. Ces structures de préhension sont prévues pour être engagées par les doigts 90 d'un outil de vissage 89 spécial adapté afin de les visser sur le filetage 23 du col cylindrique 22 de la bouteille 21. L'utilisation d'un outil de vissage spécial adapté permet de visser fortement la bague 30 et le contre-écrou 32 sur la bouteille de gaz 21 tout en évitant qu'un utilisateur, ne possédant pas l'outil adéquat, ne puisse les dévisser. L'utilisation d'un outil spécial pour ces vissages renforce dans ce cas le caractère irréversible de la solidarisation du chapeau de protection 20 sur la bouteille de gaz 21 tout en garantissant un positionnement correct de l'ouverture latérale.The ring 30 and the locknut 32 each comprise gripping structures, respectively 61 and 62, for example in the form of orifices as shown in the figures. These gripping structures are designed to be engaged by the fingers 90 of a special screwing tool 89 adapted to screw them on the thread 23 of the cylindrical neck 22 of the bottle 21. The use of a special screwing tool adapted allows the ring 30 and the lock nut 32 to be screwed tightly onto the gas bottle 21 while preventing a user, who does not possess the appropriate tool, from being able to unscrew them. The use of a special tool for these screwings reinforces in this case the irreversible nature of the fastening of the protective cap 20 on the gas bottle 21 while ensuring correct positioning of the lateral opening.

Un exemple d'outil de vissage 89 est illustré sur les figures 6 et 7. L'outil 89 comporte un corps cylindrique 92 obturé à son extrémité supérieure par un disque 94. An example of screwing tool 89 is illustrated on the Figures 6 and 7 . The tool 89 comprises a cylindrical body 92 closed at its upper end by a disk 94.

A l'extrémité inférieure 93 de l'outil 89, sur la face destinée à venir en contact avec le contre-écrou 32 et/ou la bague 30, le corps cylindrique 92 se prolonge par une embase 91 s'étendant en biais de sorte à réduire le rayon du corps cylindrique 92 pour atteindre les structures de préhension 62 du contre-écrou 32. A cet effet, l'outil 89 comporte également quatre doigts 90 s'étendant transversalement depuis l'extrémité inférieure de l'outil 89. Le rayon du corps cylindrique 92 étant supérieure à celui de l'extrémité inférieure 93 de l'outil 89, l'outil 89 permet de visser le contre-écrou 32 et/ou la bague 30 même lorsque le robinet 24 dépasse le diamètre du col cylindrique 22. At the lower end 93 of the tool 89, on the face intended to come into contact with the counter-nut 32 and / or the ring 30, the cylindrical body 92 is extended by a base 91 extending at an angle so that to reduce the radius of the cylindrical body 92 to reach the gripping structures 62 of the lock nut 32. For this purpose, the tool 89 also has four fingers 90 extending transversely from the lower end of the tool 89. the radius of the cylindrical body 92 being greater than that of the lower end 93 of the tool 89, the tool 89 makes it possible to screw the lock nut 32 and / or the ring 30 even when the valve 24 exceeds the diameter of the cylindrical neck 22.

De préférence, tel qu'illustré sur les figures 6 et 7, l'outil 89 présente une ouverture dans l'embase 91 et dans le corps cylindrique 92 permettant de positionner l'outil 89 sur un contre-écrou 32 par translation malgré la présence d'un robinet 24 dont l'orifice latéral 26 s'étend au-delà du col 22. Cette ouverture est réalisée entre deux doigts 90 de l'outil 89 selon une coupe sensiblement droite dans la hauteur de l'outil 89 et jusqu'à environ 60 à 80% de la hauteur de l'outil 89. Preferably, as illustrated on the Figures 6 and 7 , the tool 89 has an opening in the base 91 and in the cylindrical body 92 for positioning the tool 89 on a locknut 32 by translation despite the presence of a valve 24 whose lateral orifice 26 s' extends beyond the neck 22. This opening is made between two fingers 90 of the tool 89 in a substantially straight section in the height of the tool 89 and up to about 60 to 80% of the height of the tool 89.

En outre, afin d'améliorer le positionnement de l'outil 89 sur le contre-écrou 32, le contre-écrou 32 présente deux lèvres concentriques 63, 64 disposées sur la face supérieure et entre lesquelles sont positionnées les structures de préhension 62. In addition, in order to improve the positioning of the tool 89 on the locknut 32, the lock nut 32 has two concentric lips 63, 64 arranged on the upper face and between which the gripping structures 62 are positioned .

Ces deux lèvres 63, 64 forment une gorge 65 disposée sur le dessus du contre-écrou 32 de sorte à guider les déplacements de l'outil 89 lors d'une phase d'accouplement entre les doigts 90 et les structures de préhension 62. These two lips 63, 64 form a groove 65 disposed on the top of the locknut 32 so as to guide the movements of the tool 89 during a coupling phase between the fingers 90 and the gripping structures 62.

En l'absence d'un contre-écrou 32, la fixation du corps de protection 31 sur la bague 30 peut s'effectuer par clipsage, collage, soudage, emboutissage à force du corps de protection 31 sur la bague 30. In the absence of a locknut 32, the fixing of the protective body 31 on the ring 30 can be effected by clipping, gluing, welding, stamping the protective body 31 on the ring 30.

Les figures 8 et 9 illustrent une variante de l'invention dans laquelle la fixation du corps de protection 31 sur la bague 30 s'effectue par clipsage. Pour ce faire, la bague 30 présente une rainure 71 ménagée sur la face latérale externe et destinée à former un logement pour des ergots 70 de l'embase 40 du corps de protection 31. L'embase 40 comporte quatre ergots 70 régulièrement répartis au-dessus des nervures 62 situées sur la face interne de son ouverture centrale 41. Les ergots 70 s'étendent en biais vers le haut du corps de protection 31. L'épaisseur des ergots 70 est calibrée afin de conférer une capacité de flexion aux ergots 70 lors du montage du corps de protection 31 sur la bague 30. Ainsi, pour effectuer le montage du corps de protection 31 sur la bague 30, le corps de protection 31 est rapporté en translation au-dessus de la bague 30. The Figures 8 and 9 illustrate a variant of the invention in which the fixing of the protective body 31 on the ring 30 is made by clipping. To do this, the ring 30 has a groove 71 formed on the outer lateral face and intended to form a housing for the lugs 70 of the base 40 of the protective body 31. The base 40 has four lugs 70 regularly distributed over- above the ribs 62 located on the inner face of its central opening 41. The lugs 70 extend at an angle towards the top of the protective body 31. The thickness of the lugs 70 is calibrated in order to impart a bending capacity to the lugs 70 during the mounting of the protective body 31 on the ring 30. Thus, to effect the mounting of the protective body 31 on the ring 30, the protective body 31 is translationally mounted above the ring 30.

Les ergots 70 se déforment contre la paroi de l'ouverture centrale 41 de l'embase 40 jusqu'à pénétrer dans la rainure 71. Les ergots 70 reprennent alors leurs formes initiales en biais de sorte à bloquer retrait de l'embase 40 de la bague 30. En variante, les ergots 70 peuvent être disposés sur la bague 30 et la rainure ménagée sur l'embase 40. The lugs 70 deform against the wall of the central opening 41 of the base 40 to penetrate into the groove 71. The lugs 70 then resume their initial shapes at an angle so as to block withdrawal of the base 40 of the 30. Alternatively, the lugs 70 may be arranged on the ring 30 and the groove formed on the base 40.

La présente demande propose donc un chapeau de protection 20 respectant la norme ISO11117. La forme du chapeau 20 permet concomitamment de limiter le poids du chapeau de protection 20 et de limiter les sollicitations mécaniques du moule lors de la réalisation du corps 31. The present application therefore proposes a protective cap 20 complying with the ISO11117 standard. The shape of the cap 20 concomitantly makes it possible to limit the weight of the protective cap 20 and to limit the mechanical stresses of the mold during the production of the body 31.

La présente demande concerne également une bouteille de gaz 21 munie d'un chapeau de protection 20 tel que décrit ci-dessus. La bouteille de gaz 21 peut contenir du gaz pétrole liquéfié, butane, propane ou gaz technique.The present application also relates to a gas bottle 21 provided with a protective cap 20 as described above. The gas bottle 21 may contain liquefied petroleum gas, butane, propane or technical gas.

Claims (10)

  1. Protective cowl (20) for a gas cylinder (21) comprising:
    - a seat (40) comprising an opening (41) intended to be attached to a cylindrical neck (22) of a gas cylinder (21), and
    - an annular shell (42) extending from the radial end of the seat (40) and having a first height (h1), the annular shell (42) being designed in such a way as to surround a valve (24) of a gas cylinder (21) over the entire height thereof.
    - the annular shell (42) has at least a lateral opening (44-45), designed in such a way as to allow for lateral access to a side hole (26) of a valve (24) of the gas cylinder (21) without disassembling the annular shell (42) and/or in order to allow the mounting of a handle (46),
    - the annular shell (42) comprises a honeycomb structure formed by two walls (50-51) connected together by means of internal partitions (52) extending radially between the walls (50-51),
    - the annular shell (42) has a second height (h2) greater than the first height (h1), forming at least one pillar (48) at a terminating end leading onto at least one side opening (44-45).
    characterized in that the internal partition (52) of the honeycomb structure nearest the pillar (48) extends over only part of the first height (h1) of the annular shell (42)
  2. Protective cowl according to claim 1, characterized in that it also comprises:
    - a ring (30) comprising a thread (34) intended to cooperate with a thread (23) of a gas cylinder (21), and
    - means of connection between the seat (40) and the ring (30).
  3. Protective cowl according to claim 2, wherein the lower face of the ring (30) comprises a concentric flange (60) extending from the internal diameter of said ring (30), and designed in such a way as to form an abutment, the ring (30) being intended to be screwed onto a gas cylinder (21) until the flange (60) abuts against the upper wall of the gas cylinder (21).
  4. Protective cowl according to claim 2 or 3, wherein the ring (30) comprises an end-stop at the bottom of the thread designed in such a way as to form an abutment, it being intended that the ring (30) be screwed onto a gas cylinder (21) until the thread (23) of the gas cylinder (21) abuts against the end-stop at the end of the thread.
  5. Protective cowl according to claim 2 or 3, wherein the ring (30) comprises, at the upper face thereof, a shoulder from the inner diameter (30) and extending radially towards the center of the ring (30), the shoulder being designed in such a way as to form a support abutment, it being intended that the ring (30) be screwed onto a gas cylinder (21) until the upper face of a cylindrical neck (22) of the gas cylinder (21) abuts against the shoulder.
  6. Protective cowl according to claims 2 to 5, wherein the ring (30) comprises positioning structures that in combination with the matching positioning structures (62) that provide the seat (40) enable the lateral opening (44-45) to be positioned as required, while preventing the seat (40) from rotating in relation to the ring (30) when they are mutually engaged.
  7. Protective cowl according to one of claims 2 to 6, wherein the means of connection between the seat (40) and the ring (30) are implemented by means of deformable spurs (70) cooperating with housings (71), the spurs (70) extending diagonally in the mounting direction of the seat (40) within the ring (30) in order to allow for deformation of the spurs (70) when mounting the seat (40) until the spurs (70) penetrate the housings (71), the spurs (70) then assuming the initial form thereof in such a way as to block the removal of the seat (40) from the ring (30).
  8. Protective cowl according to one of claims 2 to 6, wherein the means of connection between the seat (40) and the ring (30) is implemented using a locknut (32) having an opening (35) that comprises a thread (36) matching the thread (23) of a cylindrical neck (22) of a gas cylinder (21), the locknut (32) being designed to be screwed onto the thread (23) of the gas cylinder (21) in such a way as to lock the seat (40) between the ring (30) and locknut (32).
  9. Protective cowl according to claim 8, wherein the locknut (32) has gripping structures (62) extending transversely within the locknut (32) and designed to allow the fingers (90) of a tool (89) to drive the locknut (32) in rotation in order to mount or dismount the protective cowl onto a gas cylinder (20), the locknut (32) also having a groove (65) arranged on the top of the locknut (32) in order to guide the movement of the tool (89) during a coupling step between the fingers (90) and holes (80).
  10. A gas cylinder comprising a protective cowl (10) according to one of claims 1 to 9.
EP16305024.8A 2016-01-12 2016-01-12 Universal protector for gas cylinder Active EP3193072B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16305024.8A EP3193072B1 (en) 2016-01-12 2016-01-12 Universal protector for gas cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16305024.8A EP3193072B1 (en) 2016-01-12 2016-01-12 Universal protector for gas cylinder

Publications (2)

Publication Number Publication Date
EP3193072A1 EP3193072A1 (en) 2017-07-19
EP3193072B1 true EP3193072B1 (en) 2017-12-13

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10982814B2 (en) 2019-09-03 2021-04-20 Amtrol Licensing Inc. Handle assembly for a portable pressurized gas cylinder
USD930783S1 (en) 2019-09-03 2021-09-14 Amtrol Licensing, Inc. Handle

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017007162A1 (en) * 2017-07-27 2019-01-31 Messer Gaspack Gmbh Valve protection device for pressurized gas containers
MA43446B1 (en) * 2018-10-01 2020-07-29 Imaplast Protective valve collar for LPG cylinders
IT201900003869A1 (en) * 2019-03-18 2020-09-18 Tiziano Briata Valve protection for compressed or liquefied gas cylinders, compressed or liquefied gas cylinder including such protection.
IT201900003865A1 (en) * 2019-03-18 2020-09-18 Tiziano Briata Compressed or liquefied gas cylinder valve protection device, compressed or liquefied gas cylinder including such device and method of mounting.
CN111412386A (en) * 2020-05-08 2020-07-14 长春致远新能源装备股份有限公司 L NG air supply system gas cylinder is with new material guard circle structure and with gas cylinder connection structure

Family Cites Families (3)

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Publication number Priority date Publication date Assignee Title
FR1360952A (en) 1962-06-20 1964-05-15 Nat Res Dev Platform to be used to move loads horizontally
DE4440298C2 (en) * 1994-11-11 1997-05-07 Andreas Vetter Gas bottle with valve protection collar
FR3013101B1 (en) * 2013-11-08 2015-11-06 Rovip UNIVERSAL PROTECTOR FOR GAS BOTTLE

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10982814B2 (en) 2019-09-03 2021-04-20 Amtrol Licensing Inc. Handle assembly for a portable pressurized gas cylinder
USD930783S1 (en) 2019-09-03 2021-09-14 Amtrol Licensing, Inc. Handle

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