EP0119338A1 - Hochdruckflüssigkeitsschneidgerät - Google Patents
Hochdruckflüssigkeitsschneidgerät Download PDFInfo
- Publication number
- EP0119338A1 EP0119338A1 EP83301496A EP83301496A EP0119338A1 EP 0119338 A1 EP0119338 A1 EP 0119338A1 EP 83301496 A EP83301496 A EP 83301496A EP 83301496 A EP83301496 A EP 83301496A EP 0119338 A1 EP0119338 A1 EP 0119338A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cutting head
- inlet
- head according
- outlet
- mixing zone
- 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.)
- Ceased
Links
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C5/00—Devices or accessories for generating abrasive blasts
- B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
- B24C5/04—Nozzles therefor
Definitions
- the present invention relates to a high pressure liquid cutting apparatus and more particularly to an improved cutting head for such apparatus.
- Some apparatuses where an abrasive stream is used with the water jet, include a mixing head where the jet issues from a nozzle and in so doing entrains the abrasive to carry it along with it.
- a high pressure liquid cutting head comprising a body having a through-passage having at its upstream end an inlet for liquid from a high pressure source, an outlet at its downstream end, a mixing zone intermediate the inlet and outlet ends, a nozzle arrangement for directing a jet of the liquid from the inlet through the mixing zone to the outlet and at least one inlet directed towards the outlet for introducing into the mixing zone abrasive material to be entrained by the jet of liquid, at least the downstream end of the mixing zone having a lateral wall which converges progressively towards the outlet.
- the liquid which is used is water and the abrasive material may be, for example, wet or dry river sand.
- abrasive inlets There may be a number of abrasive inlets, preferably symmetrically disposed about the axis of the through passage.
- the arrangement is such that the zone in which the abrasive is entrained in the jet of water is at the downstream end of the mixing chamber; this is intended to reduce the wear on the chamber wall.
- the converging lateral wall at the downstream end of the mixing zone is frusto-conical and preferably the whole, or at least the downstream part, of this frusto-conical portion of the wall is defined by an annular insert of abrasion-resistant material e.g. tungsten carbide.
- the nozzle arrangement is preferably arranged so that the jet issues into the mixing chamber at an optimum distance from the outlet from the point of view of abrasive entrainment and the stand-off from the material which is to be cut.
- the inlet or inlets for the abrasive material may be parallel with the axis of the through-passage or, more conveniently from a constructional viewpoint, they may be inclined at an angle with respect to it. Where their axes are inclined, preferably they are inclined at the same angle as the angle of the converging lateral wall of the mixing zone.
- the inlet or inlets may have their axes contained in a common plane with the longitudinal axis of the mixing chamber. Alternatively the inlet or inlets may be located in a plane or planes offset from the axis of the mixing chamber so as to impart a tangential component to the motion of the abrasive material. In either case, preferably the axis of the, or each, inlet intersects the mixing chamber wall at the downstream end of the converging part defined by the abrasion-resistant insert.
- the cutting head 1 shown in Figure 1 comprises a generally cylindrical body 2 of stainless steel having a through-passage 3 extending along the axis of the body from an inlet end 4 to an outlet end 5.
- the inlet end 4 is threaded to receive a coupling 6 ( Figure 3) which is used to connect the cutting head 1 to a pump 7 delivering water at a pressure of about 10,000 psi.
- the through-passage has a stepped reduction in diameter at 8 which provides a seat for a standard nozzle insert 9 which push-fits or screw-fits into position and may be replaced when worn out or when another size of jet is required.
- the nozzle 9 has at its downstream end a discharge aperture from which, in use, a high velocity jet of water issues and is directed at the outlet 5 of the cutting head. As it issues from the insert 9, it passes through a mixing zone 10 in which it creates a reduced pressure.
- the part of the mixing zone 10 defined by the body 2 is of circular cross-section and may be generally cylindrical in the interests of ease of manufacture, or more preferably from the theoretical viewpoint, of frusto-conical shape, converging towards its downstream end.
- the downstream end of the mixing zone 10 is defined by the frusto-conical inner wall 16 of an annular insert 17 of suitable abrasion resistant material such as tungsten carbide.
- the wall 16 forms a continuation of the part of the wall of the mixing chamber defined in the body 2.
- the frusto-conical wall 16 merges with a coaxial cylindrical outlet passage 18.
- This outlet passage is relatively narrow in comparison with the diameter of the water jet from nozzle 9 so that the final jet is coherent rather than a spray and thereby achieves a good cutting action.
- Symmetrically disposed about the axis of the cutting head 1 are two inlets 11 and 12 for abrasive material, these inlets being connected via tubing 13 to a source 14 of suitable abrasive material such as wet or dry river sand.
- the inlets 11 and 12 are inclined relative to the axis of the body 2 so that their axes intersect with one another and with the central longitudinal axis of the cutting head at a point 15 upstream of the outlet 5 and that the projections of their cross-sections along their own axes fall on the wall 16, i.e. so that their axes intersect that part of the wall of mixing chamber 10 defined by the inner wall 16 of the insert 17; thus there is a straight line path from the inlets 11 and 12 to the zone within the wall 16. It will be seen that the lower edge of the side wall of each inlet 11, 12 is flush with the wall of mixing chamber 10.
- the sand should be entrained in the jet as far downstream in the chamber 10 towards the outlet passage 18 as possible; this should minimise wear, particularly if the sand can travel in a straight line path from the inlet to its point of entrainment, while enabling the sand to be rapidly accelerated through the outlet 18.
- the disposition of the inlets 11 and 12 as just described is intended to ensure that entrainment occurs predominantly at the downstream end of the mixing chamber 10, this being within the wear resistant insert 17.
- the axes of the inlets 11 and 12 should be inclined at as small an angle as possible to the axis of the body 2. Conveniently they are parallel to the side wall of the mixing chamber 10. In Figure 1, they are shown as each being at approximately 30 to the axis of body 2 and this has been found to produce satisfactory results.
- the inlets 11 and 12 are threaded so as to receive respective inlet pipes for the abrasive.
- the insert 17 has an annular shoulder 19 by means of which it is retained on the body 2 by a nut 20 which screw-fits to the body 2.
- the cutting head 1 is directed towards ther material 21 which is to be cut and the pump 7 is energised to deliver water at a suitable pressure.
- the abrasive material starts to be sucked from the inlets 11 and 12 and blasted towards the material 21 so that cutting takes place.
- the head may be guided by any suitable means to follow a desired cutting profile.
- the position of the downstream end of the insert 9 is preferably chosen so that the stand-off distance from it to the material 21 being cut is an optimum and/or so that optimum entrainment of the abrasive material takes place.
- the insert 9 may, if desired, be screw-fitted to the body 2 so that its longitudinal position within the body may be adjusted as desired.
- the abrasive material in use for example where it is a slurry such as wet sand, rather than relying on the suction of the jet, the abrasive material may be pumped to the cutting head by a suitable pump.
- the present cutting apparatus may also be used for drilling holes in material.
- the length of the outlet nozzle insert 17 may be desirable to extend the length of the outlet nozzle insert 17 so that the cylindrical passageway 18 is several inches long.
- the maximum desirable length of the insert 17 is about 18 inches.
- Figures 4 and 5 show one version of a further embodiment of the present invention in which the sand is introduced into the mixing chamber 10 in such a way that it has a tangential component relative to the central axis X of the cutting head, and to enable this to be achieved the part of the mixing chamber defined by the body 2 should be frusto-conical. This is intended to impart a swirling motion to the sand and thereby enhance its entrainment by the water jet.
- the axes of the inlets still converge, as in the Figure 1 embodiment, but being in different planes, as viewed along the axis of the cutting head, they do not actually intersect with one another.
- the line A-A indicates a plane containing the central axis X of the cutting head.
- each sand inlet passage has its axis inclined so that, as in the embodiment of Figure 1, it is parallel with the frustro-conical inner wall of the insert 17, that is to say, the distance between the axis Y and a plane C-C, perpendicular to the plane A-A, decreases towards the outlet end of the cutting head, crossing this plane at a point within the frustro conical part of the outlet passage of the insert 17.
- the axes Y intersect with the inner wall 16 of the insert.
- Figure 5 shows the case where there are two sand inlet passages symmetrically disposed about the plane A-A. It will be appreciated that more than two symmetrically disposed sand inlet channels could be used, with these being directed so that they cause the sand to swirl in the same rotational direction.
- the outlet aperture of the water nozzle 9 should preferably be from about 0.5 to 4 mm.
- the internal diameter of the outlet passage 18 of the outlet nozzle insert 17 should be somewhat greater than that of the water nozzle 9 preferably by about 0.5mm and is suitably between about 1 and 4 mm.
- the distance between the outlet end of the water nozzle and the outlet end of the insert 17 is preferably not more than about 250 mm.
- the ratio of the internal diameter of the water nozzle 9 to that of the passage 18 is preferably from 1:1 to 1:4 while the ratio of the distance between the outlet end of nozzle 9 and the outlet end of passage 18 and the length of passage 18 is preferably from 1:1.1 to 1:1.62.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP83301496A EP0119338A1 (de) | 1983-03-17 | 1983-03-17 | Hochdruckflüssigkeitsschneidgerät |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP83301496A EP0119338A1 (de) | 1983-03-17 | 1983-03-17 | Hochdruckflüssigkeitsschneidgerät |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0119338A1 true EP0119338A1 (de) | 1984-09-26 |
Family
ID=8191093
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP83301496A Ceased EP0119338A1 (de) | 1983-03-17 | 1983-03-17 | Hochdruckflüssigkeitsschneidgerät |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0119338A1 (de) |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4708214A (en) * | 1985-02-06 | 1987-11-24 | The United States Of America As Represented By The Secretary Of The Interior | Rotatable end deflector for abrasive water jet drill |
US4711056A (en) * | 1984-09-27 | 1987-12-08 | Libbey-Owens-Ford Co. | Abrasive fluid jet radius edge cutting of glass |
US4768709A (en) * | 1986-10-29 | 1988-09-06 | Fluidyne Corporation | Process and apparatus for generating particulate containing fluid jets |
US4872293A (en) * | 1986-02-20 | 1989-10-10 | Kawasaki Jukogyo Kabushiki Kaisha | Abrasive water jet cutting apparatus |
WO2001044553A1 (fr) * | 1999-12-17 | 2001-06-21 | Rieter Perfojet | Dispositif pour le traitement de materiaux en feuille au moyen de jets d'eau sous pression |
WO2002024998A3 (de) * | 2000-09-21 | 2002-08-15 | Fleissner Maschf Gmbh Co | Düsenstreifen zur erzeugung von feinsten flüssigkeitsstrahlen an wasservernadelungseinrichtungen |
WO2005038189A1 (en) * | 2003-10-21 | 2005-04-28 | Shell Internationale Research Maatschappij B.V. | Nozzle unit and method for excavating a hole in an object |
EP1527820A1 (de) * | 2003-10-28 | 2005-05-04 | Thomas A. Ursic | Düse mit sich schneidenden Flüssigkeitsstrahlen |
WO2006085060A2 (en) * | 2005-02-09 | 2006-08-17 | Imerys Minerals Limited | Treatment of metakaolin |
US7322433B2 (en) | 2003-07-09 | 2008-01-29 | Shell Oil Company | Tool for excavating an object |
EP1908551A3 (de) * | 2001-08-27 | 2008-06-11 | Flow International Corporation | Vorrichtung zur Erzeugung eines Hochdruckflüssigkeitsstrahls |
US7419014B2 (en) | 2003-10-29 | 2008-09-02 | Shell Oil Company | Fluid jet drilling tool |
US7445058B2 (en) | 2003-10-21 | 2008-11-04 | Shell Oil Company | Nozzle unit and method for excavating a hole in an object |
US7448151B2 (en) | 2003-07-09 | 2008-11-11 | Shell Oil Company | Tool for excavating an object |
US7464630B2 (en) | 2001-08-27 | 2008-12-16 | Flow International Corporation | Apparatus for generating and manipulating a high-pressure fluid jet |
US7547292B2 (en) | 2001-01-11 | 2009-06-16 | Powderject Research Limited | Needleless syringe |
US7934977B2 (en) | 2007-03-09 | 2011-05-03 | Flow International Corporation | Fluid system and method for thin kerf cutting and in-situ recycling |
US8210908B2 (en) | 2008-06-23 | 2012-07-03 | Flow International Corporation | Vented cutting head body for abrasive jet system |
US8540665B2 (en) | 2007-05-04 | 2013-09-24 | Powder Pharmaceuticals Inc. | Particle cassettes and processes therefor |
WO2016071866A1 (en) * | 2014-11-05 | 2016-05-12 | Institute Of Geonics As Cr, V. V. I. | A high velocity abrasive fluid jet cutting device |
GB2579769B (en) * | 2018-10-25 | 2023-08-23 | Tectonic Facades Ltd | Cladding panel |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1183342A (en) * | 1967-01-05 | 1970-03-04 | Roto Finish Ltd | Improvements in Guns for Projecting Abrasive or Polishing Materials |
CH567907A5 (en) * | 1973-02-22 | 1975-10-15 | Bendix Corp | Textile fluid jet cutter - nozzle geometry permitting formation of long lasting coherent cutting jet |
DE2807727A1 (de) * | 1978-02-23 | 1979-08-30 | Peiniger Ernst Gmbh | Strahlgeraet fuer das druckluftstrahlen |
FR2421679A1 (fr) * | 1978-04-06 | 1979-11-02 | Lambert Ind | Embout de projection pour materiau pateux |
DE2928698A1 (de) * | 1979-07-16 | 1981-02-19 | Nat Res Dev | Vorrichtung zur erzeugung eines mit schleifmittelteilchen versetzten fluessigkeitsstrahles (dispenser) |
-
1983
- 1983-03-17 EP EP83301496A patent/EP0119338A1/de not_active Ceased
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1183342A (en) * | 1967-01-05 | 1970-03-04 | Roto Finish Ltd | Improvements in Guns for Projecting Abrasive or Polishing Materials |
CH567907A5 (en) * | 1973-02-22 | 1975-10-15 | Bendix Corp | Textile fluid jet cutter - nozzle geometry permitting formation of long lasting coherent cutting jet |
DE2807727A1 (de) * | 1978-02-23 | 1979-08-30 | Peiniger Ernst Gmbh | Strahlgeraet fuer das druckluftstrahlen |
FR2421679A1 (fr) * | 1978-04-06 | 1979-11-02 | Lambert Ind | Embout de projection pour materiau pateux |
DE2928698A1 (de) * | 1979-07-16 | 1981-02-19 | Nat Res Dev | Vorrichtung zur erzeugung eines mit schleifmittelteilchen versetzten fluessigkeitsstrahles (dispenser) |
Cited By (34)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4711056A (en) * | 1984-09-27 | 1987-12-08 | Libbey-Owens-Ford Co. | Abrasive fluid jet radius edge cutting of glass |
US4708214A (en) * | 1985-02-06 | 1987-11-24 | The United States Of America As Represented By The Secretary Of The Interior | Rotatable end deflector for abrasive water jet drill |
US4872293A (en) * | 1986-02-20 | 1989-10-10 | Kawasaki Jukogyo Kabushiki Kaisha | Abrasive water jet cutting apparatus |
US5018317A (en) * | 1986-02-20 | 1991-05-28 | Kawasaki Jukogyo Kabushiki Kaisha | Abrasive water jet cutting apparatus |
US4768709A (en) * | 1986-10-29 | 1988-09-06 | Fluidyne Corporation | Process and apparatus for generating particulate containing fluid jets |
US6668436B2 (en) | 1996-12-17 | 2003-12-30 | Rieter Perfojet | Device for treating sheet-like material using pressurized water jets |
WO2001044553A1 (fr) * | 1999-12-17 | 2001-06-21 | Rieter Perfojet | Dispositif pour le traitement de materiaux en feuille au moyen de jets d'eau sous pression |
FR2802553A1 (fr) * | 1999-12-17 | 2001-06-22 | Icbt Perfojet Sa | Dispositif pour le traitement de materiaux en feuille au moyen de jets d'eau sous pression |
WO2002024998A3 (de) * | 2000-09-21 | 2002-08-15 | Fleissner Maschf Gmbh Co | Düsenstreifen zur erzeugung von feinsten flüssigkeitsstrahlen an wasservernadelungseinrichtungen |
US6942167B2 (en) | 2000-09-21 | 2005-09-13 | Fleissner Gmbh & Co. Maschinenfbrik | Nozzle body for producing very fine liquid jet flows on water needling devices |
USRE43824E1 (en) | 2001-01-11 | 2012-11-20 | Powder Pharmaceuticals Inc. | Needleless syringe |
US7547292B2 (en) | 2001-01-11 | 2009-06-16 | Powderject Research Limited | Needleless syringe |
EP1908552A3 (de) * | 2001-08-27 | 2008-06-11 | Flow International Corporation | Vorrichtung zur Erzeugung eines Hochdruckflüssigkeitsstrahls |
EP1908551A3 (de) * | 2001-08-27 | 2008-06-11 | Flow International Corporation | Vorrichtung zur Erzeugung eines Hochdruckflüssigkeitsstrahls |
US7703363B2 (en) | 2001-08-27 | 2010-04-27 | Flow International Corporation | Apparatus for generating and manipulating a high-pressure fluid jet |
US7464630B2 (en) | 2001-08-27 | 2008-12-16 | Flow International Corporation | Apparatus for generating and manipulating a high-pressure fluid jet |
US7448151B2 (en) | 2003-07-09 | 2008-11-11 | Shell Oil Company | Tool for excavating an object |
US7322433B2 (en) | 2003-07-09 | 2008-01-29 | Shell Oil Company | Tool for excavating an object |
CN1871408B (zh) * | 2003-10-21 | 2010-11-24 | 国际壳牌研究有限公司 | 喷嘴单元以及用于在目标物中挖孔的方法 |
US7445058B2 (en) | 2003-10-21 | 2008-11-04 | Shell Oil Company | Nozzle unit and method for excavating a hole in an object |
WO2005038189A1 (en) * | 2003-10-21 | 2005-04-28 | Shell Internationale Research Maatschappij B.V. | Nozzle unit and method for excavating a hole in an object |
EP1527820A1 (de) * | 2003-10-28 | 2005-05-04 | Thomas A. Ursic | Düse mit sich schneidenden Flüssigkeitsstrahlen |
US7419014B2 (en) | 2003-10-29 | 2008-09-02 | Shell Oil Company | Fluid jet drilling tool |
WO2006085060A2 (en) * | 2005-02-09 | 2006-08-17 | Imerys Minerals Limited | Treatment of metakaolin |
WO2006085060A3 (en) * | 2005-02-09 | 2006-11-16 | Imerys Minerals Ltd | Treatment of metakaolin |
US8147293B2 (en) | 2007-03-09 | 2012-04-03 | Flow International Corporation | Fluid system and method for thin kerf cutting and in-situ recycling |
US7934977B2 (en) | 2007-03-09 | 2011-05-03 | Flow International Corporation | Fluid system and method for thin kerf cutting and in-situ recycling |
US8540665B2 (en) | 2007-05-04 | 2013-09-24 | Powder Pharmaceuticals Inc. | Particle cassettes and processes therefor |
US9044546B2 (en) | 2007-05-04 | 2015-06-02 | Powder Pharmaceuticals Incorporated | Particle cassettes and processes therefor |
US9358338B2 (en) | 2007-05-04 | 2016-06-07 | Powder Pharmaceuticals Incorporated | Particle cassettes and processes therefor |
US8210908B2 (en) | 2008-06-23 | 2012-07-03 | Flow International Corporation | Vented cutting head body for abrasive jet system |
WO2016071866A1 (en) * | 2014-11-05 | 2016-05-12 | Institute Of Geonics As Cr, V. V. I. | A high velocity abrasive fluid jet cutting device |
GB2579769B (en) * | 2018-10-25 | 2023-08-23 | Tectonic Facades Ltd | Cladding panel |
US11959285B2 (en) | 2018-10-25 | 2024-04-16 | Tectonic Facades Limited | Cladding panel |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
|
17P | Request for examination filed |
Effective date: 19841228 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
|
18R | Application refused |
Effective date: 19870515 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: DONNAN, PAUL HAWTHORNE Inventor name: PHILIPS, ROBERT |