• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Device for extracting fumes and / or particles from a welding torch comprising: - a substantially cylindrical hollow body (20) having an end opening (23); at least one exhaust outlet (25, 26) arranged through the wall of the body; and - an extension ring (21) which is removable and adapted to be fixed at the end opening of the body, in particular by screwing or clipping or interlocking.
    公开号:FR3056931A1
    申请号:FR1659496
    申请日:2016-10-03
    公开日:2018-04-06
    发明作者:Jean Michel Dabert
    申请人:Starwelding Torches；
    IPC主号:
    专利说明:

    SMOKE EXTRACTION DEVICE FOR WELDING TORCH
    The invention relates to a smoke extraction device for a welding torch and to an arc welding torch comprising such a device.
    The invention will be more particularly described with regard to a TIG welding torch (for the acronym "Tungsten Inert Gas"), without however being limited to it and may be applied to any arc welding torch such than MIG (English acronym for "Metal inert Gas") or other.
    The object of the invention is to provide a device which fits on current torches but can of course be directly integrated during the manufacture of new welding torches.
    TIG welding uses a shielding gas such as argon, which is diffused around the electrode and on the weld, to avoid instant oxidation of the weld when the welded metal melts.
    The fumes emitted during welding as well as the release of heavy particles such as nickel, chromium, berylium and cadmium oxides, are harmful to the welder and require their evacuation to ensure a healthy working environment and respect the labor code regulations.
    Extractor hood systems exist but are not suitable for portable welding stations.
    In addition, the extraction of fumes is only really effective when they are captured at the source, that is to say closest to the weld. To this end, suction devices are known associated with the welding torch. However, they are dedicated to MIG welding stations and are not suitable for TIG torches, the protective gas essential for welding is then very largely sucked by the suction device. In addition, these devices are not necessarily adaptable to existing welding torches and prove to be bulky.
    The invention therefore aims to provide a device dedicated to the suction of fumes and other harmful welding particles for welding torch, which does not have the aforementioned drawbacks, and in particular allows io to effectively suck harmful fumes during welding by the TIG process without risk of sucking the shielding gas.
    The device of the invention dedicated to the suction of fumes and other harmful welding particles is called for convenience, suction device. However, the device of the invention considered in isolation is not a suction device as such when it is not used while being connected to a suction system. The suction device of the invention is intended to channel and convey the fumes to a suction system.
    According to the invention, the device for extracting smoke and / or particle emissions from a welding torch comprises:
    - a substantially cylindrical hollow body having an end opening;
    - at least one exhaust outlet arranged through the wall of the hollow body (the exhaust outlet in the form of an orifice being intended to be connected via means of routing to a suction system); and
    - An extension ring which is removable and capable of being fixed at the end opening of the body, in particular by screwing or clipping or interlocking, the ring delimiting a cylindrical internal cavity, preferably of circular section.
    A welding torch comprises, in known manner, a torch body, a nozzle projecting from the downstream part of the torch body, and a slender electrode housed in and coming out of the nozzle.
    Thus, the suction device of the invention is intended to be detachably associated or not with a welding torch body (at the level of the downstream part of the torch body comprising the electrode), by covering the nozzle. welding the torch without protruding from the free end of the welding nozzle, and in particular by keeping a separation distance between the free end of the welding nozzle and the free end of the extension ring of the device .
    In the position of use of the suction device on a welding torch, the extension ring is intended to provide with the nozzle of the torch an annular empty volume in which the fumes are intended to be sucked.
    Thus, the suction device provides, thanks to the extension ring of an envelope around and at a distance from the nozzle of the welding torch, the suction takes place at the level of the separation space of the nozzle and the ring and an annular ring forming around the bundle of protective gas leaving the nozzle, avoiding any risk of sucking the gas.
    In addition, the suction device performs its function while being compact.
    Furthermore, the removability of the extension ring allows, by removing the ring when not in use from the welding torch and without dismantling the entire suction device, to have access to the nozzle of the welding torch; the nozzle being removable, it is then easy to access the constituent elements of the welding torch for their maintenance or replacement, such as the shielding gas diffuser or the electrode of the torch.
    According to one characteristic, the extension ring is hollow and cylindrical, preferably of circular inner section, and has a solid wall.
    The extension ring, in the position of use of said device on a welding torch which has a nozzle, is intended to surround the nozzle of the torch and to provide with said nozzle an annular empty volume in which are intended to be aspirated the smoke, preferably the radial distance separating the outer wall of the nozzle from the inner wall of the ring is of the order of 4 to 8 mm, preferably 5 mm.
    According to another characteristic, the extension ring has a suitable length such that in the position of use of the device, the free end of the ring opposite the body of the device does not protrude from the free end of the nozzle of the welding torch, in particular the distance separating the respective free ends of the extension ring and the nozzle is between 8 and 15 mm, preferably of the order of 12 mm.
    The extension ring is made of a heat-resistant material, in particular metallic or polytetrafluoroethylene (PTFE or also known under the name TefIon®).
    The device may include a set of several interchangeable extension rings, each of different length. Thus, depending on the length of the nozzle of the welding torch, it will be easy to associate the extension ring with the appropriate length in order to aspirate optimally without disturbing the shielding gas.
    Advantageously, the body is made of an electrically insulating and heat-resistant material, in particular at a temperature of the order of that of welding, such as of the order of at least 200 ° C., in particular the body being made of polytetrafluoroethylene ( PTFE) or a phenoplast of the Bakelite or Celeron type.
    According to yet another characteristic, the suction device comprises means for conveying the fumes and / or particles connected to at least the exhaust outlet, in particular the conveying means comprising at least one pipe, preferably two pipes, meeting after a certain length to form only a single terminal pipe intended to be connected to a suction system, at least part of the conveying means being intended to be integrated in a sheath corresponding to the supply bundle electricity and gas from the torch for which said device is intended.
    The presence of two pipes at the outlet of the body of the suction device, at least over a certain length has certain advantages. Indeed, arranging at the outlet two pipes rather than a single pipe, makes it possible to reduce the section of each of the pipes. We gain in size. In addition, such a configuration provides flexibility of the device for its handling. In addition, the presence of two pipes ensures an increase in the suction speed.
    In a particular embodiment, the suction device comprises two exhaust outlets, preferably of section on the order of 5 to 10 mm in diameter, and conveying means comprising two pipes, of section of the 5 to 10 mm) connected respectively to the two exhaust outlets (preferably via brass nipples between 1 and 3 cm long fixed to said outlets for example by screwing), in particular the two pipes being made of a resistant material to heat such as silicone and / or rubber and extending over a length of the order of 0 5 to 1.5 m, preferably the two pipes joining in a single end pipe of section of the order from 10 to 12 mm.
    According to another characteristic, the body of the device has an additional end opening, opposite the opening associated with the extension ring, and has a hole (recess) in its wall at the limit of said additional end opening. This enlarged end opening configuration of the hollow body (via the recess) gives the suction device its removable function. In particular, the suction device can be mounted on a welding torch without tools, by interlocking or clipping.
    When the suction device is removable, the snap-in attachment of the suction device is done very slightly in force. Removal is easy, because although the material constituting the body of the suction device is rigid, the torch body being in a flexible material (slightly elastic), a very slight manual twisting of the torch body makes it possible to dissociate the device.
    The invention also relates to a welding torch, in particular a TIG welding torch, comprising the suction device of the invention, the device being removable or the body of the device forming with the torch a one-piece molded assembly.
    In the following description, the terms "upper" and "lower" are understood to be elements of the suction device in the associated position of the device on a welding torch held in condition of use.
    “Length” means, with respect to the extension ring to the hollow body of the suction device, the dimension extending along the longitudinal axis of the electrode of the welding torch in the associated position of the device d suction on the torch.
    The present invention is now described with the aid of examples which are only illustrative and in no way limit the scope of the invention, and from the attached illustrations, in which:
    - Figure 1 shows a schematic side view of a conventional welding torch;
    - Figure 2 illustrates the torch of Figure 1 on which is mounted the suction device of the invention;
    io - Figure 3 illustrates a perspective view of part of the device of Figure 2, without the means for conveying the fumes;
    - Figure 4 is an exploded view of a part of the inventive device, without the means for conveying the fumes, and on the opposite side of the view in Figure 3;
    - Figure 5 is a schematic side view of the torch and the device of Figure 2 connected to a smoke extraction system;
    - Figure 6 is a schematic cross-sectional view of the device of the invention with the means for conveying the fumes.
    Figure 1 illustrates a conventional welding torch 1. The welding torch 1 described below is by way of nonlimiting example used for TIG welding.
    The suction device 2 of the invention, illustrated in FIGS. 2 et seq., Makes it possible to assist in the suction of fumes and / or noxious particles emanating from welding when using the welding torch of FIG. 1.
    The welding torch 1 usually comprises a torch body 10 surmounted by a torch head 11, a longitudinal electrode 12 passing right through the torch head and free end 12A dedicated to welding, a cylindrical nozzle 13 (by example in ceramic or here in thermostable glass of the Pyrex® type, thus being transparent) associated with the torch head 11 and surrounding the electrode 12 at a distance, said electrode protruding from the distal end 13A of the nozzle 13, and a closed distal end 15, usually called a "plug", which is opposite the nozzle 13 and houses the non-visible end of the electrode 12.
    In addition, internal parts are housed in the torch head 11 and in the nozzle 12, such as an adapter 16 constituting an interface piece for fixing between the nozzle 12 and the torch head 11 for fixing the nozzle, as well as a diffuser 17 forming a perforated disc arranged inside the nozzle and carried by the adapter 16, the diffuser serving to deliver the inert gas uniformly around the electrode and therefore of the weld during the implementation of the torch.
    The aforementioned constituent elements of the welding torch are advantageously removable.
    The torch body 10 is connected to a flexible sheath 3 (also usually called a torch bundle) housing the power supply cables and the supply of inert protective gas of the argon type.
    The suction device 2 is preferably designed to be removably associated with the torch 1, so as to be mounted on an already existing torch. Of course, the suction device 2 can be made integrally with the torch head 11 and form therewith a one-piece assembly.
    The suction device 2 comprises a hollow cylindrical body 20 the interior of which is preferably of circular section, an extension ring 21 removably fixed on the cylindrical body 20. The cylindrical body has two opposite end openings 22 and 23, the end opening 23 being suitable for fixing the ring 21.
    The suction device 2 illustrated here is removable. Its mounting on the torch head 11 is possible thanks on the one hand to the end opening 22 opposite the ring 21, and on the other hand to a hole 24 opening onto said end opening. Indeed, the cylindrical body 20 comprises from the end opening 22 and in an arc of the order of 30 to 45 °, a recess thus providing the hole 24 in the thickness of the wall, extending over a length of the order of a third of the length of the cylindrical body.
    The body 20 of the suction device 2 is made of an electrically insulating material which is also heat resistant, for example made of PTFE also known under the name Teflon®. Although the material constituting the body 20 is rigid, the suction device 2 is capable of being easily assembled and disassembled from the torch head 11 (and this without tools) thanks to the end opening 22 and to the hole / recess 24, as well as due to the relatively flexible material of the torch head.
    Furthermore, the suction device 2 comprises at least one exhaust port 25, preferably two exhaust ports 25 and 26 arranged in the proximal part of the body 20 and in the lower part of the body in the mounted position of the device. With reference to FIGS. 2 to 5, the orifices 25 and 26 form smoke evacuation outlets entering the hollow body 20 from the extension ring 21 and intended to be evacuated via said orifices to conveying means 4 connected on the one hand to said orifices 25, 26, and on the other hand to a suction system 5.
    The suction device 2 is associated with the torch body 10 by engagement in parallel and around the nozzle 13 of the torch, then by ίο fitting and by force on the torch head 11, so that once mounted on the head torch, the suction device is sealed at the end opening 22 and the recess 24. Thus, the fumes sucked in from the extension ring 21 necessarily pass through the exhaust orifices 25 and 26.
    The extension ring 21 is preferably metallic. It can be in another heat resistant material such as PTFE. It has a solid wall. It is preferably cylindrical with a circular interior section.
    The extension ring 21 is removable with respect to the hollow body 20 so as to be able to access the various constituent elements of the torch body which can be dismantled if necessary, without having to remove the suction device
    2.
    The extension ring 21 is for example fixed by screwing at the end opening 23. As visible in FIG. 4, the hollow body has an external thread 23A at the end opening 23 intended to cooperate with a thread arranged inside the extension ring 21.
    Alternatively, the extension ring 21 can be fixed otherwise such as by clipping.
    The extension ring 21 is arranged around the nozzle 13 and at a distance from its outer wall so as to provide an annular volume of vacuum between the outer wall of the nozzle 13 and the inner wall of the ring 21. The suction of the smoke is made in this annular volume. The extension ring 21 has an inner contour which follows the shape of the outer contour of the nozzle 13 of the torch.
    π
    The radial distance separating the outer wall of the nozzle 13 from the inner wall of the ring 21 is for example of the order of 4 to 8 mm, preferably 5 mm.
    The extension ring 21 has an appropriate length relative to the length of the nozzle 13 of the torch 1 to effectively perform its fume extraction function while avoiding any risk of aspiration of the protective gas delivered by the welding torch .
    Thus, with reference to FIG. 2, the distance separating the free end 13A of the nozzle 13 from the free end 21A of the extension ring is of the order of 8 to 15 mm, preferably 12 mm. Advantageously, depending on the type of welding nozzle 13, the length of the extension ring can vary. Preferably, a set of several interchangeable rings is provided, each of different length.
    As non-limiting dimensional examples: the length of the body
    20 is around 35 mm, the length of the extension ring is around 15 mm, and the inner circular section of the ring and hollow body is around 23 mm.
    Finally, the suction device 2 comprises the conveying means 4 which connect the exhaust orifices 25 and 26 to the suction system 5. The conveying means 4 comprise at least one pipe intended to be connected to the system d suction 5.
    The suction system 5 is a suction system known per se provided with suitable filters and which can in particular suction at a flow rate of 75 to 150 m 3 / hour.
    In an exemplary embodiment (FIG. 6), the conveying means 4 comprise two pipes 40 and 41 in a heat-resistant material, for example silicone with a section of the order of 5 to mm, the two pipes joining in a terminal pipe 42, preferably made of polyurethane (PU), intended to be connected to the suction system 5.
    Advantageously, the pair of pipes 40 and 41 extends over a length 5 of the order between 50 cm and 1.5 m.
    Preferably, all of the pipes are housed in a sheath constituting the supply beam 3 of the torch.
    The exhaust orifices 25 and 26 are tapped in the thickness of the wall of the body 20 to fix there by screwing two teats 43 and 44 protruding out of the hollow body and to which the two pipes and 41 are connected respectively.
    权利要求:
    Claims (10)
    [1" id="c-fr-0001]
    1. Device for extracting fumes and / or particles from a welding torch comprising:
    5 - a substantially cylindrical hollow body (20) having an end opening (23);
    - at least one exhaust outlet (25, 26) arranged through the wall of the body; and
    - An extension ring (21) which is removable and capable of being fixed at the level of the end opening of the body, in particular by screwing or clipping or interlocking.
    [2" id="c-fr-0002]
    2. Device according to claim 1, characterized in that the extension ring (21) is hollow and cylindrical, preferably of circular inner section, and has a solid wall.
    15
    [3" id="c-fr-0003]
    3. Device according to claim 1 or 2, characterized in that the extension ring (21), in the position of use of said device on a welding torch (1) which has a nozzle (13), is intended to surround the nozzle (13) of the torch and to provide with said nozzle an annular empty volume into which are intended to be aspirated the
    20 fumes, in particular the radial distance separating the outer wall of the nozzle from the inner wall of the ring is between 4 and 8 mm, preferably the radial distance is 5 mm.
    [4" id="c-fr-0004]
    4. Device according to the preceding claim, characterized in that the extension ring (21) has a suitable length such that in
    25 position of use of the device, the free end (21 A) of the ring opposite the body (20) does not protrude from the free end (13A) of the nozzle (13) of the welding torch, in particular the distance separating the respective free ends (21 A, 13A) of the extension ring and the nozzle is between 8 and 15 mm, preferably is 12 mm.
    [5" id="c-fr-0005]
    5. Device according to any one of the preceding claims, characterized in that the extension ring (21) is made of a material
    5 heat resistant, in particular metallic or polytetrafluoroethylene (PTFE).
    [6" id="c-fr-0006]
    6. Device according to any one of the preceding claims, characterized in that it comprises a set of several interchangeable extension rings (21) and each of different length.
    io
    [7" id="c-fr-0007]
    7. Device according to any one of the preceding claims, characterized in that the body (20) is made of an electrical insulating material and resistant to heat, in particular at a temperature of the order of that of welding such as l '' order of at least 200 ° C, in particular the body (20) being made of polytetrafluoroethylene (PTFE) or a
    15 Bakelite or Celeron phenoplast.
    [8" id="c-fr-0008]
    8. Device according to any one of the preceding claims, characterized in that it comprises means for conveying (4) the fumes and / or particles connected to at least the exhaust outlet (25), preferably to two exhaust outlets (25, 26) in
    20 particular section of the order of 5 to 10 mm in diameter, in particular the conveying means (4) comprising at least one pipe (40), preferably two pipes (40, 41), in particular said made in one heat resistant material such as silicone and / or rubber, the two pipes (40, 41) being connected
    25 respectively at the two exhaust outlets (25, 26) and meeting after a certain length to form only a single terminal pipe (42) intended to be connected to a suction system (5), at least a part routing means (4) being intended to be integrated in a sheath corresponding to the electricity and gas supply bundle of the torch for which said device is intended.
    [9" id="c-fr-0009]
    9. Device according to any one of the preceding claims, characterized in that the body (20) has an opening
    5 of additional end (22), opposite the opening (23) associated with the ring, and has a hole (24) in its wall at the limit of said additional end opening (22).
    [10" id="c-fr-0010]
    10. Welding torch (1), in particular TIG welding torch, comprising a suction device according to any one of the preceding claims, the device being removable or the body (20) of the device forming with the torch an assembly molded monoblock.
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    同族专利:
    公开号 | 公开日
    EP3300827A1|2018-04-04|
    EP3300827B1|2021-06-16|
    FR3056931B1|2019-08-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPS50129627U|1974-04-13|1975-10-24|
    DE7738617U1|1977-12-17|1978-04-27|Neue Schweisstechnik, Roland Endler Gmbh, 4040 Neuss|Device for extracting welding fumes|
    JP2002096173A|2000-07-19|2002-04-02|Toyota Industries Corp|Fume suction nozzle|
    EP2298485A1|2009-09-10|2011-03-23|TBI Industries GmbH|Suction device for robotic welding torches|EP3300827A1|2016-10-03|2018-04-04|Starwelding Torches|Tig welding torch provided with a fume-suction device|
    CN109332858A|2018-11-28|2019-02-15|江苏科技大学|A kind of hollow tungsten electrode profundity melts the welding method of TIG filler wire welding slab|
    FR3090436A1|2018-12-19|2020-06-26|Etablissements Chpolansky|Suction system for a TIG welding torch|JP3007855B2|1996-12-17|2000-02-07|株式会社セフテック|Welding torch with fume collection hood attached to nozzle|
    FR3056931B1|2016-10-03|2019-08-30|Starwelding Torches|FUMES SUCTION DEVICE FOR A WELDING TORCH|
    法律状态:
    2018-01-23| PLFP| Fee payment|Year of fee payment: 2 |
    2018-04-06| PLSC| Publication of the preliminary search report|Effective date: 20180406 |
    2018-10-25| PLFP| Fee payment|Year of fee payment: 3 |
    2019-10-28| PLFP| Fee payment|Year of fee payment: 4 |
    2020-10-27| PLFP| Fee payment|Year of fee payment: 5 |
    2021-10-27| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1659496|2016-10-03|
    FR1659496A|FR3056931B1|2016-10-03|2016-10-03|FUMES SUCTION DEVICE FOR A WELDING TORCH|FR1659496A| FR3056931B1|2016-10-03|2016-10-03|FUMES SUCTION DEVICE FOR A WELDING TORCH|
    EP17194350.9A| EP3300827B1|2016-10-03|2017-10-02|Tig welding torch provided with a fume-suction device|
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