EP1254719A1 - Austragsvorrichtung für ein Hochdruckreinigungsgerät - Google Patents

Austragsvorrichtung für ein Hochdruckreinigungsgerät Download PDF

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Publication number
EP1254719A1
EP1254719A1 EP01201628A EP01201628A EP1254719A1 EP 1254719 A1 EP1254719 A1 EP 1254719A1 EP 01201628 A EP01201628 A EP 01201628A EP 01201628 A EP01201628 A EP 01201628A EP 1254719 A1 EP1254719 A1 EP 1254719A1
Authority
EP
European Patent Office
Prior art keywords
valve member
ejection device
tubular body
liquid ejection
pressure
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Withdrawn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
EP01201628A
Other languages
English (en)
French (fr)
Inventor
Lasse Lind
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.)
Nilfisk AS
Original Assignee
Nilfisk Advance AS
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 Nilfisk Advance AS filed Critical Nilfisk Advance AS
Priority to EP01201628A priority Critical patent/EP1254719A1/de
Priority to PCT/DK2002/000290 priority patent/WO2002089994A1/en
Priority to EP02740396A priority patent/EP1383609A1/de
Publication of EP1254719A1 publication Critical patent/EP1254719A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
    • B05B1/16—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets
    • B05B1/1609—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets with a selecting mechanism comprising a lift valve

Definitions

  • the present invention relates to a liquid ejection device for a pressure-cleaning apparatus, comprising a housing with means for receiving a liquid supply tube, a tubular body having a multiple of axially orientated flow channels, a first end inserted in connecting means in the housing for connecting the tubular body, and a second end with an ejection nozzle, and means for regulation of the pressure of the liquid spray ejected through the tubular body.
  • a water ejection device wherein the water is supplied at a certain pressure and ejected with either a high pressure or a low pressure.
  • the pressure regulation mechanism consists of a tubular member on the outer side of the cylindrical body that is slidable in the axial direction between an open and a closed position.
  • the drawback of this washing gun is that only two pressure outputs may be achieved.
  • the pressure regulation may be difficult to operate since the pressure changing mechanism is provided at the nozzle or near the ejection nozzle on the cylindrical body, usually referred to as the lance.
  • a liquid ejection device of the initially mentioned kind wherein the regulation means includes a valve member with a threaded portion by which it is rotatably mounted, and a flow passage for feeding one or more of the flow channels of the tubular body with pressurised liquid.
  • a liquid ejection device is provided with a pressure regulation that may be adjusted to any pressure between a minimum and a maximum pressure due to the threaded mounting of the valve member.
  • the threaded mounting is designed in such a way that it is ensured that the valve member is retained in the predetermined position set by the operator and is not moved by the pressurised flow in the channels. This could be achieved by providing the threaded portion with a self-locking thread pitch or at least a sufficiently fine screw pitch.
  • the pressurised flow from the flow passage is fed into one or more of the flow channels depending on the amount of pressure desired, i.e. the volume of the "active" flow channels. If maximum pressure is chosen only one of the flow channels are active, and if any pressure less than maximum is desired, the opening for liquid flow into the other flow channel or channels is present and increased in size, so that the smaller pressure desired, the larger the opening is.
  • valve member is rotatably mounted in the housing.
  • the pressure regulation is provided in the handle of the liquid spraying device. This means that the operator of the device can also operate during use in a simple manner.
  • the valve member is provided in the housing in such a way that axial distance between the valve member and the first end is adjustable.
  • the infinitely variable pressure regulation is simple in design and involves relatively few parts.
  • the valve member is preferably provided with a valve seat flange that corresponds to the first end of the tubular body in such a way that at least one of the flow channels are blocked when the valve seat flange abuts the first end.
  • the valve member is provided with a concentric disk portion that partly extends outside the housing.
  • the pressure may be regulated by rotating the disk in a clockwise or anti-clockwise direction in order to increase or decrease the pressure.
  • the disk is positioned in the housing near the hand of the operator, so that the pressure regulation easily may be carried out by the operator during use.
  • index means are provided between the valve member and the housing.
  • the index means include a spring-loaded ball that co-operates with annularly disposed cavities on the disk portion of the valve member.
  • the operator will be able to sense a response to the adjustments due to audible clicks as the disk is rotated.
  • the tubular body comprises an inner tube and an outer tube, said tubes being aligned substantially concentric and defining a central flow channel and an annular second flow channel.
  • the central flow channel is substantially aligned with the feeding flow passage of the valve member.
  • the flow passage of the valve member is constantly in flow communication with the central flow channel of the tubular body, irrespective of the position of the valve member.
  • the second flow passage is only open when the device is adjusted in such a way that a pressure less than maximum pressure is to be ejected from the nozzle of the device.
  • a particular simple and reliable cooperation between the tubular body and the valve member is achieved in order to provide the pressure regulation.
  • a liquid ejection device In fig. 1, a liquid ejection device is shown. It comprises a housing 2 or main body with a trigger 3 for operating the device.
  • the housing 2 has a connecting means 4 for receiving and connecting a liquid supply pipe 5.
  • the supplied liquid is supplied at a certain pressure from a base station (not shown).
  • the liquid may be water, a cleaning agent, or a mixture thereof.
  • pressure regulating means 6 are provided in the housing 2 in the housing 2, pressure regulating means 6 are provided.
  • the liquid flows through the housing 2 via the pressure regulating means 6 and into a tubular body 7, often referred to as a lance.
  • the tubular body 7 is provided with a first end adapted to be releasably connected to the housing 2.
  • the liquid is ejected from a spraying nozzle 8 at the second end of the tubular body.
  • the tubular body 7 may preferably be provided with a handle 9 for holding and directing the direction of liquid spray from the nozzle 8.
  • the tubular body 7 is cylindrical in shape.
  • the handle 9 may be made with means for releasably fastening it around the tubular body 7.
  • the handle 9 may be pivoted from one side of the device to the other, thereby setting up the device for left-handed or right-handed operator.
  • the handle 9 may be shifted in the axial direction.
  • the pressure regulating means 6 inside the housing 2 is shown in detail.
  • the pressure regulating means 6 are shown in the maximum pressure position and in fig. 3 in the minimum pressure position.
  • the pressure regulating means includes a valve member 10 that is rotatably mounted between a first and a second housing element 11, 12.
  • the valve member 10 comprises a cylindrical, threaded portion 10' that is rotatably mounted in the housing element 11 via a corresponding thread 11' in the housing element 11.
  • the valve member 10 has a cylindrical portion 13 encompassing a corresponding portion of the second housing element 12 in such a way that the valve member may slide in the axial direction on the second housing element 12.
  • the first housing element 11 is - at the end opposite the end accommodating the valve member 10 - designed to receive the tubular body 7, which is releasably connected to the housing 2.
  • the valve member 10 is provided with a central flow passage 14 through which the pressurised liquid flow from the flow passage 15 in the housing is directed towards the tubular body 7, see figs. 2 and 3.
  • a main valve 29 is provided in the flow passage 15 of the housing 2. This main valve 29 is operated by the trigger 3.
  • the tubular body 7 includes two concentric cylindrical tubes 18, 19 defining a central flow channel 16 and an annular outer flow channel 17.
  • the central flow channel 16 is axially aligned with the valve flow passage 14.
  • the valve member 10 is provided with a disk 20 that partly extends out of the housing 2 so that the operator of the device can rotate the valve member 10 in order to regulate the pressure of the liquid spray.
  • Retention means 21, 22, 23 are provided between the first housing element 11 and the disk 20.
  • the retention means include a spring-loaded ball 22 that is biased towards the disk 20 by a biasing member 21, such as a spring or the like.
  • a biasing member 21 such as a spring or the like.
  • On the disk a number of annularly arranged dimples 23 are provided. The dimples 23 receive the outermost portion of the ball 22 whereby the disk 20 is provided with a certain amount of resistance against being rotated.
  • the valve member 10 is ensured against being forced out of the determined position corresponding to the desired pressure set by the operator.
  • the end of the valve member 10 is formed as a valve seat 24 with a shape that corresponds to the end flange 25 of the first end of the tubular body 7.
  • the valve seat 24 abuts the end flange 25 of the tubular body 7 so that the pressurised liquid flow is exclusively directed from the flow passage 14 of the valve member 10 into the central flow channel 16 of the tubular body 7. This results in a high-pressure output at the nozzle 8.
  • valve member 10 As the valve member 10 is screwed backwards (relative to the direction of the liquid flow), a gap between the valve seat 24 and the end flange 25 emerges (see fig. 3). As the gap increases, the pressure output at the nozzle 8 drops since a ever larger portion of the liquid flows is diverted into the second flow channel 17 resulting in an increase in volume for the flow through the tubular body 7 and as a consequence a drop in pressure compared to the input pressure from the supply pipe 5.
  • the tubular body 7 are assembled at the end by an end piece 26 holding the central tube 18 inside the outer tube 19.
  • the end piece 26 has a central bore 28 through which access is provided to the first flow channel 16 and a number of openings 27 through which access to the second flow channel 17 is provided.
EP01201628A 2001-05-03 2001-05-03 Austragsvorrichtung für ein Hochdruckreinigungsgerät Withdrawn EP1254719A1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP01201628A EP1254719A1 (de) 2001-05-03 2001-05-03 Austragsvorrichtung für ein Hochdruckreinigungsgerät
PCT/DK2002/000290 WO2002089994A1 (en) 2001-05-03 2002-05-03 A liquid ejection device for a high-pressure cleaning apparatus
EP02740396A EP1383609A1 (de) 2001-05-03 2002-05-03 Flüssigkeitsausstossvorrichtung für eine hochdruckreinigungsvorrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01201628A EP1254719A1 (de) 2001-05-03 2001-05-03 Austragsvorrichtung für ein Hochdruckreinigungsgerät

Publications (1)

Publication Number Publication Date
EP1254719A1 true EP1254719A1 (de) 2002-11-06

Family

ID=8180249

Family Applications (2)

Application Number Title Priority Date Filing Date
EP01201628A Withdrawn EP1254719A1 (de) 2001-05-03 2001-05-03 Austragsvorrichtung für ein Hochdruckreinigungsgerät
EP02740396A Withdrawn EP1383609A1 (de) 2001-05-03 2002-05-03 Flüssigkeitsausstossvorrichtung für eine hochdruckreinigungsvorrichtung

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP02740396A Withdrawn EP1383609A1 (de) 2001-05-03 2002-05-03 Flüssigkeitsausstossvorrichtung für eine hochdruckreinigungsvorrichtung

Country Status (2)

Country Link
EP (2) EP1254719A1 (de)
WO (1) WO2002089994A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004052548A1 (de) * 2002-12-11 2004-06-24 Alfred Kärcher Gmbh & Co. Kg Düsenanordnung für ein hochdruckreinigungsgerät

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE277067C (de) *
US4095747A (en) * 1976-05-17 1978-06-20 Specialty Manufacturing Company High pressure coaxial flow nozzles
EP0501164A1 (de) * 1991-02-11 1992-09-02 FAIP S.r.L. OFFICINE MECCANICHE Injektordüse für Hochdruckreinigungsgerät
DE4327155C1 (de) * 1993-08-12 1994-10-06 Kaercher Gmbh & Co Alfred Strahlrohr fuer ein Hochdruckreinigungsgeraet
EP0927562A2 (de) * 1998-01-05 1999-07-07 Vigh, Andreas, Dipl.-Ing. (FH) Flachstrahlerzeugung mit einer Hohl-Strahldüse für Feuerlöschzwecke

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2567176A (en) * 1948-03-31 1951-09-11 Edward D Ballard Fire fighting nozzle
CH324995A (fr) * 1955-11-14 1957-10-31 Fischer Traugott Lance de pulvérisation
US4834293A (en) * 1988-03-23 1989-05-30 Lichfield William H Spray wand

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE277067C (de) *
US4095747A (en) * 1976-05-17 1978-06-20 Specialty Manufacturing Company High pressure coaxial flow nozzles
EP0501164A1 (de) * 1991-02-11 1992-09-02 FAIP S.r.L. OFFICINE MECCANICHE Injektordüse für Hochdruckreinigungsgerät
DE4327155C1 (de) * 1993-08-12 1994-10-06 Kaercher Gmbh & Co Alfred Strahlrohr fuer ein Hochdruckreinigungsgeraet
EP0927562A2 (de) * 1998-01-05 1999-07-07 Vigh, Andreas, Dipl.-Ing. (FH) Flachstrahlerzeugung mit einer Hohl-Strahldüse für Feuerlöschzwecke

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004052548A1 (de) * 2002-12-11 2004-06-24 Alfred Kärcher Gmbh & Co. Kg Düsenanordnung für ein hochdruckreinigungsgerät
US7360721B2 (en) 2002-12-11 2008-04-22 Alfred Kaercher Gmbh & Co. Kg Nozzle assembly for a high-pressure cleaning device
CN100431712C (zh) * 2002-12-11 2008-11-12 阿尔弗莱德凯歇尔有限公司及两合公司 用于高压清洁装置的喷嘴部件

Also Published As

Publication number Publication date
EP1383609A1 (de) 2004-01-28
WO2002089994A1 (en) 2002-11-14

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