EP1093887B1 - Tête de dosage, en particulier pour outil de scellement entraîné par combustion - Google Patents

Tête de dosage, en particulier pour outil de scellement entraîné par combustion

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Publication number
EP1093887B1
EP1093887B1 EP00810885A EP00810885A EP1093887B1 EP 1093887 B1 EP1093887 B1 EP 1093887B1 EP 00810885 A EP00810885 A EP 00810885A EP 00810885 A EP00810885 A EP 00810885A EP 1093887 B1 EP1093887 B1 EP 1093887B1
Authority
EP
European Patent Office
Prior art keywords
metering
outlets
head
valves
chambers
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.)
Expired - Lifetime
Application number
EP00810885A
Other languages
German (de)
English (en)
Other versions
EP1093887A2 (fr
EP1093887A3 (fr
Inventor
Joachim Thieleke
Kaveh Towfighi
Iwan Wolf
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Publication of EP1093887A2 publication Critical patent/EP1093887A2/fr
Publication of EP1093887A3 publication Critical patent/EP1093887A3/fr
Application granted granted Critical
Publication of EP1093887B1 publication Critical patent/EP1093887B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0382—Constructional details of valves, regulators

Definitions

  • the invention relates to a dosing according to claim 1, which is particularly suitable for use in combustion-powered setting tools, with the help of fasteners can be shot into objects.
  • an air / fuel gas mixture provided a drive energy and transmitted via a piston to the fastener, which may for example be in the form of a nail, a bolt, or the like.
  • the air / fuel gas mixture is possibly in different mixing ratios in all sub-combustion chambers of a subdivided into several combustion chambers combustion chamber.
  • the partial combustion chambers are connected to each other by means of a plurality of passage openings.
  • the combustion is started in a first rear partial combustion chamber, and it starts to spread a flame front at a relatively slow speed in this partial combustion chamber. It pushes unburned air / fuel gas mixture before it, which passes through the passage openings in the next part of the combustion chamber, etc., and here produces turbulence and precompression.
  • the flames When the flame front reaches the passage openings to the next partial combustion chamber, the flames, due to the small cross sections of the passage openings, accelerate as flame jets into the next partial combustion chamber and generate further turbulence here.
  • the mixed, turbulent air / fuel gas mixture in this partial combustion chamber is then ignited over the entire surface of the flame jets. It burns at a high speed, which leads to a strong increase in the efficiency of the combustion, since the cooling losses remain small. In this way, a partial combustion chamber (or main chamber) limiting piston is driven, the drive energy is transmitted to the fastener.
  • a combustion-powered setting tool for fastening elements an air / fuel gas mixture is sucked into the partial combustion chambers by clamping the partial combustion chambers.
  • the air / fuel gas mixture can thus not be set individually for the individual partial combustion chambers. This precludes optimal operation of the device. In addition, it is not ensured that an ignitable air / -brenngasgemisch is obtained in each of the partial combustion chamber at all.
  • US 4,913,331 describes a setting device for fasteners with multiple combustion chambers.
  • a filling cylinder is fixed, in which a piston moves, which is acted upon by a spring.
  • a fuel gas chamber is formed, which is filled for example with butane.
  • a measuring cylinder in which a metering valve is movably arranged.
  • a measuring chamber is connected via a first channel to the fuel gas chamber and in another position of the metering valve to a second channel.
  • the second channel opens into a mixture forming chamber, which is connected via a nozzle to a combustion chamber.
  • the nozzle is equipped with two output channels.
  • the invention has for its object to provide a dosing, with the individual dosing of different rooms with fuel gas is possible.
  • a dosing head for the metered output of a liquid fuel gas in different combustion chambers of a working device, in particular a fastener setting device, has an inlet for receiving the liquid fuel gas and at least two outputs and further includes at least one with the input and the Outputs connected metering valve.
  • individually metered fuel gas can be dispensed in liquid form via the respective outlets, so that the individual and ignitable gas mixtures in the respective combustion chambers can be set separately in accordance with desired operating conditions of a combustion-powered setting device in order to increase the reliability and efficiency of the device improve. It is thus obtained under all conditions in all partial combustion chambers an ignitable gas mixture, the z.
  • an air-fuel gas mixture, an oxygen-fuel gas mixture or any other suitable combustible gas mixture may be.
  • a metering valve and a plurality of outputs are present, then an individual metering per output can take place in that the outputs have, for example, different output cross sections.
  • the dosing head contains two or more metering valves, which are connected to its input in common and in each case separately to one of its two or more outlets, then the individual metering per output channel can be set by selecting the metering volume of the respective metering valves, that is to say by selecting metering valves with different large dosing chambers.
  • the size of the output openings of the outputs could also be set here, if this was still necessary.
  • the outlets may preferably be formed as nozzles for dispensing a mist of fuel gas for metering so that better vaporization of the liquid fuel gas is possible, and thus better mixing for setting a desired gas mixture of e.g. Air and fuel gas.
  • a desired gas mixture e.g. Air and fuel gas.
  • the inlets of the dosing of all dosing valves can be permanently connected to its input.
  • its input may be surrounded by resilient lugs in order to clamp the dosing head onto a bottle in which liquid fuel gas is contained.
  • the lugs engage behind a corresponding peripheral flange at the outlet of the gas cylinder.
  • the input of the dosing acts on the outlet valve of the gas cylinder and opens it, so that in this way all dosing located in the dosing are constantly filled when the inlets of the dosing are open.
  • the metering valves can be arranged so that a metering valve longitudinal axis is perpendicular to a longitudinal axis of the outputs.
  • inlets and outlets of metering chambers of the metering valves can thereby be opened and closed, So be switched that the input of the dosing head is moved relative to a Dosierkopfgephaseuse perpendicular to the direction of the longitudinal axes of the outputs. This can be done for example by lifting the gas cylinder, ie by moving the gas cylinder on the dosing to or away from it. Such movement of the gas cylinder may be in accordance with the operation of the setting device whose combustion chambers are to be filled with fuel gas by means of the dosing head.
  • the metering valves may be arranged in the dosing head so that a metering valve longitudinal axis runs parallel to a longitudinal axis of the outputs.
  • inlets and outlets of metering chambers of the metering valves can thereby be opened and closed, that is switched, that the metering valves are moved relative to the outputs of the metering in the direction of the longitudinal axes of the outputs.
  • the outputs of the dosing head are fixedly inserted into a combustion chamber wall, and only that part of the dosing head which carries the dosing valves is moved towards or away from the outputs, also in accordance with the operations of the setting device, whose combustion chambers are to be filled with the aid of the dosing with liquid fuel gas.
  • the portion of the dosing head carrying the dosing valves and the gas cylinder, which is in fluid contact with the inlet of the dosing head, are firmly connected to one another.
  • a dosing head 1 is fixedly mounted on a gas cylinder 2, in which a liquid fuel gas is located.
  • the dosing head 1 has for this purpose in its lower region resiliently formed and downwardly projecting hooks 3, which engage behind a circumferential bead 4 on the upper end side of the gas cylinder 2 from the inside.
  • a metering valve 5 Within the dosing head 1 is a metering valve 5, whose longitudinal axis 6 is aligned with the longitudinal axis 7 of the gas cylinder 2.
  • An unillustrated valve chamber of the metering valve 5 is connected on the input side to a hollow pipe 8 which projects from the bottom 9 of the metering head 1. If the dosing head 1 is placed on the gas cylinder 2, the hollow socket 8 engages in the outlet valve of the gas cylinder 2 and opens it. Liquefied gas is thus passed from the gas cylinder 2 and through the hollow pipe 8 into a channel 10 of the metering valve and finally reaches its metering chamber.
  • the dosing of the metering valve 5 is thus constantly filled via the inlet with liquid fuel gas when the dosing head 1 is mounted on the gas cylinder 2 and is not operated.
  • an outlet of the metering chamber of the metering valve 5 is initially closed and is opened only when needed, in which case the inlet to the metering chamber is briefly closed. This will be done later.
  • the outlet of the metering chamber is connected via an outlet channel 11 of the metering valve 5 in fluid communication with an annular channel 12, via a connecting channel 13. From the annular channel 12 go from two transverse channels 14 and 15, each in a Ausspritzdüse 16 and 17 open.
  • the annular channel 12, the connecting channel 13 and the transverse channels 14 and 15 are located in a cap portion 18 of the dosing head 1, wherein the cap member 18 receives the metering valve 5 in its lower portion and a bottom portion 19 of the metering valve 1, relative to the cap member 18 in the direction the metering valve longitudinal axis 6 is displaceable and the metering valve 5 carries.
  • the already mentioned hook 3 and the hollow pipe 8 are for example integrally attached.
  • the output channel 11 of the metering valve 5 is first inserted in the direction of the metering valve longitudinal axis 6 in the correspondingly extending part of the connecting channel 13. If an outer flange 20 of the metering valve 5 is raised by lifting the gas cylinder 2 and inserting the bottom part 19 into the cap part 18, the inlet to the metering chamber of the metering valve 5 is first closed and then the outlet of the metering chamber of the metering valve 5 is opened so that the metered volume at liquid fuel gas to the ejection nozzles 16 and 17 passes.
  • the ejection nozzles 16 and 17 are located in cylindrical members 21 and 22 which are connected to the cap member 18.
  • These cylindrical members 21 and 22 have outer sealing rings 23 and 24 to be sealingly inserted into corresponding recesses in the combustion chamber wall of a setting tool.
  • the cap member 18 is fixed or immovably connected to the combustion chamber wall.
  • Longitudinal axes 25 and 26 of the ejection nozzles 16 and 17 (outputs of the dosing head 1) are perpendicular to the longitudinal axis 6 of the metering valve 5. If the gas cylinder 2 is relieved again, it takes the bottom part 19 with it and moves it slightly out of the cap part 18 downwards out. This leads first to the closure of the outlet of the metering chamber of the metering valve 5 and then to the opening of its inlet, so that the metering chamber is filled again with liquid fuel gas.
  • Figures 3 and 4 show a second embodiment of a dosing head according to the invention 1.
  • the same parts as in the first embodiment of Figures 1 and 2 are provided with the same reference numerals and will not be described again.
  • the dosing head 1 has two metering valves 5a and 5b whose metering valve longitudinal axes 6a and 6b are spaced apart and parallel to the longitudinal axis 7 of the gas cylinder 2. If the valve head 1 is seated firmly on the gas cylinder 2 and the bottom part 19 is not displaced relative to the cap part 18, valve chambers 27a, 27b of both metering valves 5a, 5b are constantly and simultaneously filled with liquid fuel gas, via the hollow pipe 8 and a suitable one Channel 10, which runs in the interior of the bottom part 19. This channel 10 is in fluid communication with the hollow pipe 8.
  • the inlets 30a, 30b to the valve chambers 27a, 27b are now open, as can be seen in particular Figure 3.
  • Outlets 28a and 28b of the valve chambers 27a, 27b are still closed in the position according to FIG. They are in turn via output channels 11a, 11b with transverse channels 29a, 29b in fluid communication, which in turn open into the nozzles 16 and 17.
  • the output channels 11a, 11b are supported on the edge region of the transverse channels 29a, 29b. If the gas cylinder 2 is pressed in the direction of the cap part 18 when the cap part 18 is stationary, the bottom part 19 is partially retracted into the cap part 18. Initially, the inlets 30a, 30b of the metering chambers 27a, 27b are closed and their outlets 28a, 28b are opened. This allows the metered liquid to flow to the nozzles 16 and 17.
  • FIGS. 5 to 8 A third embodiment of a dosing head 1 according to the invention is shown in FIGS. 5 to 8. This is a dosing head 1 with two metering valves 5a, 5b, whose metering valve longitudinal axes 6a, 6b are perpendicular to the longitudinal axis 7 of the gas cylinder 2.
  • the same parts as in Figures 1 and 2 or 3 and 4 are again provided with the same reference numerals and will not be described again.
  • the metering chambers 27a, 27b of the metering valves 5a, 5b are in fluid communication with the hollow stub 8 via a channel 10, so that they are filled with liquid fuel gas when the outlets 28a, 28b are not within the Dosing chambers 27a, 27b come to rest, so are virtually closed. In this case, no liquid fuel gas reaches the nozzles 16, 17.
  • the output passages 11a, 11b in fluid communication with the outlets 28a, 28b terminate in a rear face sealingly into a front plate 18a of the cap member 18.
  • the exit passages 11a, 11b are in fluid communication with the nozzles 16 and 17.
  • the cylindrical members 21 and 22 having the nozzles 16 and 17 are integrally connected to the front plate 18a and have inner channels 16a, 17a extending from the nozzles 16, 17 to the output ports 11a, 11b.
  • the connection between the front plate 18a and the output channels 11a, 11b is at least liquid-tight in the edge region of the output channels 11a, 11b.
  • the front plate 18a is perpendicular to the longitudinal axes 6a, 6b of the metering valves 5a, 5b and is inserted via their cylindrical components 21, 22 fixed in corresponding openings of a combustion chamber wall.
  • the bottom part 19, with which the gas cylinder 2 is fixedly connected are displaced in the direction of the front plate 18a, in accordance with the working cycle of the setting device whose combustion chambers are to be filled via the nozzles 16 and 17 with liquid fuel gas.
  • a drive mechanism controlled by the setting device can act on the bottom part 19 in the longitudinal direction of the axles 6a, 6b or 25, 26.
  • the bottom part 19 remains unencumbered, ie unshifted, liquid fuel gas from the gas cylinder 2 is supplied to the metering chambers 27a, 27b together, via the hollow pipe 8 and the adjoining channel pipe 10. It connects the inner channel of the hollow pipe 8 with both metering chambers 27a , 27b.
  • the inlets 30a, 30b of these metering chambers are now open, wherein they can be seen in FIG. They bear the reference numerals 30a, 30b.
  • the outlets 28a, 28b are outside the metering chambers 27a, 27b and are therefore closed.
  • Springs 31a, 31b which are supported on the bottom part 19, constantly push a valve tappet 32a, 32b into the position in which the inlets 30a, 30b are opened.
  • the output channels 11a, 11b seated on the valve tappets 32a, 32b are supported on the front panel 18a.
  • the valve chamber housing 33 a, 33 b connected to the bottom part 19 a is entrained accordingly, so that it closes the inlets 30 a, 30 b on the side to the bottom and toward the Nozzles 16, 17 pass over the inlets 28a, 28b, so that they come to lie within the valve chambers 27a, 27b.
  • Dosed liquid gas in the metering chambers 27a, 27b can then pass through the outlets 28a, 28b and the channels 11a, 11b to the nozzles 16, 17.
  • the valve chamber housing 33a, 33b are moved back and the outlets closed.
  • the springs 31a, 31b hold the valve tappets 32a, 32b so that the inlets 30a, 30b open again.
  • FIG. 9 shows an axial section through a metering valve used in the invention.
  • the valve lifter 32a carries a cylinder 37 having the exit passage 11a and a lateral transverse passage 28a which may be referred to as a valve outlet.
  • a valve chamber housing 33a forms the valve chamber 27a and has an elastic seal 34 at the end facing the valve lifter 32a.
  • a flange 20a holds the valve chamber housing 33a relative to the bottom part 19.
  • the free end of the outlet passage 11a is in contact with the front plate 18a shown in FIG the cap portion 18.
  • the output channel 11a with the help of the already mentioned compression spring 31a on the valve stem 32a pressed against the front panel 18a.
  • the compression spring 31a is supported on the bottom of the bottom part 19.
  • FIG. 9 shows a position of the valve chamber housing 33a relative to the outlet channel 11a, in which the transverse channel 28a comes to lie within the valve chamber 27a.
  • the outlet of the metering valve is thus open, so that in the valve chamber 27 a befindliches liquid fuel gas can be output via the channels 28 a, 11 a. If the bottom part 19 is relieved, it pulls the flange 20a relative to the valve stem 32a and the output channel 11a to the rear, so that the flange 20a passes over the transverse channel 28ain Figure 9 to the left. The outlet of the metering valve is thus closed.
  • the elastic portion 34 of the valve chamber housing 33a is moved over a beveled trailing edge 35 of the cylinder 37, so that now there is a gap between this edge 35 and the opposite elastic member 34 so that valve chamber inlets 30a are present through in the direction of arrow liquid fuel gas can flow into the valve chamber 27 a.
  • the retracted position of the flange 20a is limited by a stop 36 on the outside of the cylinder 37.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Claims (12)

  1. Tête de dosage (1) pour la fourniture dosée d'un gaz combustible liquide à différentes chambres de combustion d'un outil de travail, en particulier d'un outil de scellement d'éléments de fixation, avec une entrée (8) pour recevoir le gaz combustible liquide et avec au moins deux sorties (16, 17) ainsi qu'avec au moins une soupape de dosage (5 ; 5a, 5b) reliée à l'entrée (8) et aux sorties (16, 17), caractérisée en ce que les sorties (16, 17) comportent chacune un canal de sortie (11a, 11b ; 14, 15) qui peut être relié à une des différentes chambres de combustion.
  2. Tête de dosage pour la fourniture dosée d'un gaz combustible liquide à différentes chambres de combustion d'un outil de travail, en particulier d'un outil de scellement d'éléments de fixation, avec une entrée (8) pour recevoir le gaz combustible liquide et avec au moins deux sorties (16, 17), caractérisée en ce qu'elle renferme deux soupapes de dosage ou plus (5a, 5b) qui sont reliées conjointement à l'entrée (8) et séparément à une de ses deux sorties ou plus (16, 17), et en ce que les sorties (16, 17) comportent chacune un canal de sortie (11a, 11b, 14, 15) qui peut être relié à une des différentes chambres de combustion.
  3. Tête de dosage (1) selon la revendication 1 ou 2, caractérisée en ce qu'un axe longitudinal de soupape de dosage (6 ; 6a, 6b) s'étend au moins sensiblement perpendiculairement à un axe longitudinal des sorties (16, 17).
  4. Tête de dosage (1) selon la revendication 1 ou 2, caractérisée en ce qu'un axe longitudinal de soupape de dosage (6a, 6b) s'étend au moins sensiblement parallèlement à un axe longitudinal des sorties (16, 17).
  5. Tête de dosage (1) selon une des revendications 1 à 4, caractérisée en ce que les sorties sont conformées en buses (16, 17).
  6. Tête de dosage (1) selon une des revendications 1 à 5, caractérisée en ce que les sorties (16, 17) sont de dimensions différentes.
  7. Tête de dosage (1) selon la revendication 2, caractérisée en ce que les soupapes de dosage (5a, 5b) comportent des chambres de dosage (27a, 27b) de dimensions différentes.
  8. Tête de dosage (1) selon une des revendications 2 à 7, caractérisée en ce que des orifices d'admission (30a, 30b) de chambres de dosage (27a, 27b) des soupapes de dosage (5 ; 5a, 5b) sont en communication permanente avec son entrée (8).
  9. Tête de dosage (1) selon une des revendications 2, 3 et 5 à 8, caractérisée en ce que les orifices d'admission (30a, 30b) et les orifices d'échappement (28a, 28b) des chambres de dosage (27a, 27b) des soupapes de dosage (5a, 5b) sont commutables en déplaçant-une partie de fond de tête de dosage (19) comportant son entrée (8) par rapport à un boîtier de tête de dosage (18) comportant les sorties (16, 17), perpendiculairement à la direction des axes longitudinaux (25, 26) des sorties (16, 17).
  10. Tête de dosage (1) selon une des revendications 2, 4 et 8, caractérisée en ce que les orifices d'admission (30a, 30b) et les orifices d'échappement (16, 17) des chambres de dosage (27a, 27b) des soupapes de dosage (5a, 5b) sont commutables en déplaçant les soupapes de dosage (5a, 5b) par rapport à ses sorties (16, 17) dans la direction des axes longitudinaux (25, 26) des sorties (16, 17).
  11. Tête de dosage selon la revendication 10, caractérisée en ce qu'elle comporte une plaque frontale fixable (18a) pourvue des sorties (16, 17) et une partie de fond de tête de dosage (19) qui peut se rapprocher de la plaque frontale (18) et s'en éloigner et qui reçoit les soupapes de dosage (5a, 5b).
  12. Tête de dosage (1) selon une des revendications 1 à 11, caractérisée en ce que son entrée (8) est entourée par des appendices élastiques (3).
EP00810885A 1999-10-19 2000-09-26 Tête de dosage, en particulier pour outil de scellement entraîné par combustion Expired - Lifetime EP1093887B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19950350 1999-10-19
DE19950350A DE19950350C2 (de) 1999-10-19 1999-10-19 Dosierkopf, insbesondere für brennkraftbetriebene Setzgeräte

Publications (3)

Publication Number Publication Date
EP1093887A2 EP1093887A2 (fr) 2001-04-25
EP1093887A3 EP1093887A3 (fr) 2004-10-06
EP1093887B1 true EP1093887B1 (fr) 2006-08-16

Family

ID=7926168

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00810885A Expired - Lifetime EP1093887B1 (fr) 1999-10-19 2000-09-26 Tête de dosage, en particulier pour outil de scellement entraîné par combustion

Country Status (6)

Country Link
US (1) US6419168B1 (fr)
EP (1) EP1093887B1 (fr)
JP (1) JP4729163B2 (fr)
KR (1) KR20010049981A (fr)
DE (2) DE19950350C2 (fr)
ES (1) ES2270802T3 (fr)

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DE19950350C2 (de) 2002-06-20
JP2001191257A (ja) 2001-07-17
DE19950350A1 (de) 2001-05-03
KR20010049981A (ko) 2001-06-15
EP1093887A2 (fr) 2001-04-25
JP4729163B2 (ja) 2011-07-20
US6419168B1 (en) 2002-07-16
DE50013326D1 (de) 2006-09-28
EP1093887A3 (fr) 2004-10-06
ES2270802T3 (es) 2007-04-16

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