EP2463063A2 - Outil d'enfoncement - Google Patents

Outil d'enfoncement Download PDF

Info

Publication number
EP2463063A2
EP2463063A2 EP11189328A EP11189328A EP2463063A2 EP 2463063 A2 EP2463063 A2 EP 2463063A2 EP 11189328 A EP11189328 A EP 11189328A EP 11189328 A EP11189328 A EP 11189328A EP 2463063 A2 EP2463063 A2 EP 2463063A2
Authority
EP
European Patent Office
Prior art keywords
combustion chamber
injection line
wall
tacker according
fuel
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.)
Withdrawn
Application number
EP11189328A
Other languages
German (de)
English (en)
Other versions
EP2463063A3 (fr
Inventor
Iwan Wolf
Thomas Sperrfechter
Dierk Tille
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 EP2463063A2 publication Critical patent/EP2463063A2/fr
Publication of EP2463063A3 publication Critical patent/EP2463063A3/fr
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to a tacker, in particular a hand-held tacker, according to the preamble of claim 1.
  • US 4,712,379 describes a driven with fuel gas tacker, in which liquefied gas is fed from a storage tank via a gas line into a combustion chamber. After injection of a quantity of fuel gas into the combustion chamber filled with air, an ignition of the fuel gas-air mixture can take place in order to drive a piston with an adjoining driving ram for driving in a fastening member, for example a nail.
  • such devices are operated with liquefied petroleum gas, with a quantity of the pressurized liquid in the liquid phase being initially introduced via a valve member into the conduit to the combustion chamber.
  • a sufficient, as complete as possible evaporation of the liquefied gas and mixing with the combustion air passes while a certain period of time, which can have a disruptive effect as a delay in the operation of the tacker.
  • the release of the fuel gas from the storage tank is not carried out regularly before pressing the tacker to a workpiece, whereby a safety mechanism is actuated. If an excessively long period of time elapses between this release of the gas and the ignitability of the mixture, there is the risk that the user will set the device down again or trigger it in the course of partial settling.
  • the heat-conducting element accelerates a heat input into the fuel and reduces the proportion of delay time attributable to the line until the production of an ignitable mixture in the combustion chamber.
  • the injection line is preferably in thermal contact with an outer wall of the combustion chamber. Particularly preferably, the injection line contacts the outer wall of the combustion chamber.
  • the heat-conducting element comprises a wall section which extends outwardly and / or inwardly from an outer wall of the injection line.
  • the wall section is in thermal contact with the outer wall of the combustion chamber.
  • the wall portion extends along the injection line.
  • the injection line has two or more flow chambers for the fuel, which are separated by the wall portion.
  • the flow chambers are separated from each other only by the wall portion.
  • the optimization is an at least partial formation of the injection line of a highly thermally conductive material, in a preferred embodiment with a thermal conductivity of more than 70 W / (m * K) is formed.
  • the fuel of the tacker is a liquefied gas which enters the injection line in liquid phase and has to undergo phase transformation until ignition of the mixture in the combustion chamber, the heat to be supplied to the fuel is relatively large.
  • a high thermal conductivity of the injection line is particularly advantageous. It has been found that the known from the prior art lines made of steel, stainless steel or even made of plastic. These materials have particularly low thermal conductivities and are therefore less suitable for promoting the evaporation of liquefied petroleum gas or other fuel in the injection line.
  • the injection line is formed of copper. Depending on the purity of the copper material, such an injection line may have thermal conductivities of between about 250 and 400 W / (m * K), typically 350 to 370 W / (m * K). In principle, however, other highly thermally conductive materials are conceivable, for example aluminum, brass or other materials whose thermal conductivities are significantly higher than those of steel or plastic.
  • the injection line has at least sections of a plurality of branch lines.
  • the inner surface of the injection conduit, which can heat the fuel gas is relatively small in relation to the volume of the injection conduit.
  • At least two of the branch lines are formed as segments of a line with a plurality of chambers. Through the walls of the segments in the interior of the line while the heat input from the outside into the fuel, which is guided in the segments, improved.
  • segmented lines can be made in various known ways, for example, from a plurality of sheets or as extruded profiles.
  • At least two of the branch lines can be formed as separate lines, which are preferably, but not necessarily, spatially differently guided.
  • At least one of the separate branch lines may be in thermal contact with an outer wall of the combustion chamber.
  • several of the branch lines are spatially different and are each in thermal contact with different areas of the outer wall, so that a particularly optimized heat transfer of the waste heat of the outer wall of the combustion chamber can be made in the supplying fuel lines.
  • the separate branch lines open at spaced locations in the combustion chamber. This already makes a better distribution of the fuel in the combustion chamber advance from the place of injection, so that an even faster reaching an ignitable mixture is given.
  • provision may be made for the jets of fuel injected from the branch lines into the combustion chamber to cross over one another. By the meeting of at least partially gasified fuel at high speed, a particularly good turbulence takes place through the collision of the fuel molecules, aerosol droplets and other components of the fuel jet.
  • the heat-conducting element is arranged downstream of the valve member.
  • an insulating element between the valve member and the heat-conducting element is arranged.
  • the insulation element is formed in particular by a line section of the fuel line of heat-insulating material, for example by a plastic, rubber and / or silicone hose.
  • hand-held tacker comprises a housing 1, in which a driving ram 2 for driving nails, screws, rivets or other fasteners (not shown) from a magazine 3 in a workpiece is included.
  • the driving ram 2 is connected at its end facing away from the workpiece with a piston 3, which is guided in a cylinder 4 slidably.
  • the cylinder 4 is the continuation or part of a combustion chamber 5, which is ventilated via a movable sleeve 6.
  • a fan 7 is also arranged, which is drivable via a fan motor 7a and allows improved mixing of a fuel with the combustion air.
  • an ignition device (not shown) is also arranged, which can be triggered via a arranged on a handle 1a of the housing 1 operating switch 14.
  • the fuel is stored in a tank 8 in a lower portion of the housing 1.
  • the fuel is liquefied gas, for example propane or other suitable gases.
  • the tank 8 is thus an accumulator. It can be designed as a refillable, stationary and permanently arranged in the housing 1 tank, as a replaceable cartridge or the like.
  • the tank 8 is connected via a line section 8a with a valve member 9, wherein via the valve member 9, a metering of the liquid gas is made to flow into the combustion chamber 5.
  • An injection line 10 extends between the valve member 9 and the combustion chamber 5. Due to the pressure and flow conditions, the liquid gas will normally be present not only in the tank 8 but also in the supply line 8a in the liquid phase up to the valve member 9. By opening the valve member 9, the liquefied gas then experiences a pressure drop, so that in the entire injection line 10 already the process of evaporation of the liquefied gas takes place in the course of metering or injection into the combustion chamber 5.
  • this is at least in a section hydraulically between the valve member 9 and the combustion chamber 5, in particular spaced from the valve member 9, in a first separate branch line 11 and a second separate branch line 12 divided, which are guided spatially different.
  • the branch lines 11, 12 open at opposing, spatially spaced positions in the combustion chamber 5.
  • the alignment of the junctions of the branch lines 11, 12 is made so that the injected jets of liquid gas in the combustion chamber cross over or meet. As a result, a better turbulence and faster evaporation in the combustion chamber 5 is achieved.
  • branch lines 11, 12 may be guided in their course to the combustion chamber 5 in thermal contact with an outer wall of the combustion chamber or of the cylinder 4, 5.
  • waste heat of the combustion chamber 4, 5 are discharged into the branch lines 11, 12, so that the evaporation within the branch lines 11, 12 is improved.
  • branch lines 11, 12 branch off in a branch piece 13 from the first section of the injection line 10. It is understood that the branch lines 11, 12 can already start directly at the valve 9, depending on the design.
  • Fig. 2 shows an embodiment of the invention, in which the injection line 10 is formed as a segmented conduit with two chambers 10a, 10b.
  • the line 10 has a circular cross-section of the outer circumference, wherein the segments 10a, 10b are each formed substantially semicircular.
  • the line 10 comprises an outer, hollow-cylindrical cable jacket 14, wherein the segments 10a, 10b each have their own jacket of a metal sheet 15.
  • the segmented injection line 10 can also be integrally formed in one piece of material, for example as an extruded profile. Segmentation may also be present for other than circular outer cross sections; In particular, the line may have a rectangular or square outer cross-section.
  • a design of the line as a flat tube with a plurality of adjacent chambers or channels, as it is known for example from the construction of heat exchangers, is conceivable.
  • a segmented line according to the invention is designed as a bundle, for example twisted bundle, of a plurality of separate thin lines with a circular inner cross section. Such a line can be divided in particular in the course of their leadership in the housing 1 in a plurality of spatially separate courses of the individual thin lines.
  • a highly thermally conductive material for example copper
  • the injection line is preferably combined with each of the above-mentioned physical formations of the injection line 10, 11, 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
EP11189328A 2010-12-13 2011-11-16 Outil d'enfoncement Withdrawn EP2463063A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010062955A DE102010062955A1 (de) 2010-12-13 2010-12-13 Eintreibgerät

Publications (2)

Publication Number Publication Date
EP2463063A2 true EP2463063A2 (fr) 2012-06-13
EP2463063A3 EP2463063A3 (fr) 2013-02-27

Family

ID=45350640

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11189328A Withdrawn EP2463063A3 (fr) 2010-12-13 2011-11-16 Outil d'enfoncement

Country Status (8)

Country Link
US (1) US20120144827A1 (fr)
EP (1) EP2463063A3 (fr)
JP (1) JP2012125912A (fr)
CN (1) CN102528752A (fr)
AU (1) AU2011254000A1 (fr)
CA (1) CA2759658A1 (fr)
DE (1) DE102010062955A1 (fr)
TW (1) TW201231230A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111347375B (zh) * 2020-02-17 2022-11-01 天津大学 一种液氮射钉枪装置
CN113417491B (zh) * 2021-07-02 2022-06-28 宜昌东阳建设工程有限公司 一种建筑施工用墙壁破拆装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4712379A (en) 1987-01-08 1987-12-15 Pow-R Tools Corporation Manual recycler for detonating impact tool

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4411307A (en) * 1981-01-29 1983-10-25 Atlantic Richfield Company Wound tube heat exchanger
DE10218194B4 (de) * 2002-04-24 2004-05-13 Hilti Ag Über expandierende Gase antreibbares Setzgerät
DE10259816B4 (de) * 2002-12-19 2005-01-20 Hilti Ag Brennkraftbetriebenes Arbeitsgerät, insbesondere Setzgerät mit volumetrischer, gasförmiger Dosierung
US7124923B2 (en) * 2004-11-18 2006-10-24 Illinois Tool Works Inc. Combustion-powered tool fuel heating system
DE102005000134A1 (de) * 2005-10-05 2007-04-12 Hilti Ag Brennkraftbetriebenes Setzgerät
JP2008018513A (ja) * 2006-07-14 2008-01-31 Makita Corp 燃焼式作業工具
DE102008000286A1 (de) * 2008-02-13 2009-08-20 Hilti Aktiengesellschaft Brennkraftbetriebenes Setzgerät

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4712379A (en) 1987-01-08 1987-12-15 Pow-R Tools Corporation Manual recycler for detonating impact tool

Also Published As

Publication number Publication date
JP2012125912A (ja) 2012-07-05
TW201231230A (en) 2012-08-01
US20120144827A1 (en) 2012-06-14
EP2463063A3 (fr) 2013-02-27
CA2759658A1 (fr) 2012-06-13
CN102528752A (zh) 2012-07-04
AU2011254000A1 (en) 2012-06-28
DE102010062955A1 (de) 2012-06-14

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