WO1988004220A1 - Procede et appareil de sablage abrasif par voie humide - Google Patents

Procede et appareil de sablage abrasif par voie humide Download PDF

Info

Publication number
WO1988004220A1
WO1988004220A1 PCT/GB1987/000856 GB8700856W WO8804220A1 WO 1988004220 A1 WO1988004220 A1 WO 1988004220A1 GB 8700856 W GB8700856 W GB 8700856W WO 8804220 A1 WO8804220 A1 WO 8804220A1
Authority
WO
WIPO (PCT)
Prior art keywords
nozzle
accordance
abrasive
inlet
fluid
Prior art date
Application number
PCT/GB1987/000856
Other languages
English (en)
Inventor
Kenneth Gordon Mccoll
Original Assignee
K.G. McCOLL & COMPANY LIMITED
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 K.G. McCOLL & COMPANY LIMITED filed Critical K.G. McCOLL & COMPANY LIMITED
Publication of WO1988004220A1 publication Critical patent/WO1988004220A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate material
    • B05B7/1431—Arrangements for supplying particulate material comprising means for supplying an additional liquid
    • B05B7/1436—Arrangements for supplying particulate material comprising means for supplying an additional liquid to a container where the particulate material and the additional liquid are brought together
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0007—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier
    • B24C7/0038—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier the blasting medium being a gaseous stream
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0084—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a mixture of liquid and gas

Definitions

  • This invention relates to a method and an apparatus for wet abrasive blasting of, for example, steel, stone, wood and structures constructed therefrom.
  • a method of cleaning structures which comprises directing a jet of fluid with entrained abrasive at the structure characterised in that the said jet is surrounded by a high velocity gas jet.
  • the high velocity gas jet which provides the main acceleration and propulsion force, is provided coaxially about the fluid abrasive jet.
  • the abrasive such as sand
  • the fluid such as water
  • a gravity fed arrangement or from a container which is subject to pressurisation.
  • This invention also provides an apparatus for wet sand blasting of structures, the apparatus including a noszle structure incorporating a high pressure fluid feed in operative combination with an inlet for abrasive arranged such that the fluid flow draws in and entrains the abrasive, the noszle structure having an outlet surrounded by a coaxially positioned annular nozzle assembly supplied with compressed gas.
  • the abrasive is sand fed to the nozzle structure from a container which is subject to compressed gas such as air, or in an alternative arrangement the sand is fed from a hopper which includes a compressed air feed serving to agitate or fluidise the sand.
  • the compressed air feed is effected through a pipe with a plurality of apertures along its length, the pipe extending through the hopper and the feed pipe thereby serving to fluidise the sand and improve the flow.
  • Figure la shows diagrammatically an arrangement for the nozzle
  • Figure 1b shows a first modification
  • Figure 1c shows a second modification
  • Figure 2a shows one method of feeding sand to the nozzle utilising a hopper
  • Figure 2b shows an alternative method of feeding sand and water to the nozzle
  • Figure 3 shows a further method of feeding sand to a nozsle using a compressed air source feeding a container
  • Figure 4 shows a more detailed construction of nozzle assembly
  • Figure 5 shows an alternative construction of nozzle.
  • the object of the apparatus according to the invention is to provide a high velocity jet of fluid such as water with entrained abrasive, sand as example, suitable for blasting metal or the like surfaces to clean same.
  • a nozzle 1 which incorporates a high pressure water feed 2 with an orifice 3 of small size which feeds a nozzle chamber 4. Dry sand is fed through an inlet 5 and this sand is entrained by the water issuing into the chamber 4 to thereby produce a high velocity water and sand jet 6.
  • a coaxially positioned annular nozzle assembly 7 is provided which is fed with high pressure air 8. The air supply 8 thus surrounds the water and sand issuing from jet 6 and serves to accelerate both the water and the sand with a resultant improved cleaning effect on the structure.
  • Figure 1b shows an advantageous modification wherein the high velocity water and sand jet issues from the nozzle 1 at 6a with a small angle of divergence.
  • Figure 1c shows a further modification where small transversely acting air jets 6b are arranged to impinge on the jet 6. In both these arrangements the acceleration of the centre jet of water and sand is improved due to the interference with the air jet 8.
  • FIG. 2a the feed pipe 20 which serves to couple with the sand inlet 5 of Figures la, 1b, 1c is fed with sand from a hopper 21.
  • a compressed air feed pipe 22 extends through the centre of the hopper and coaxially along the pipe 20.
  • This pipe 22 is provided with spaced apertures 23a along its length and is fed with compressed air which serves to agitate the sand, thus improving the flow characteristics. Further compressed air feed points are provided at 23 which agitate sand within the hopper.
  • FIG 3 a further alternative arrangement is provided whereby the feed pipe 30 for sand which connects with the inlet 5 of Figure 1 is supplied from a pressure pot 31 containing sand which is fed with compressed air through an inlet 32.
  • This arrangement causes the sand to be fed into the nozzle assembly under pressure thus improving the take-up.
  • the feed pipe 30 includes a valve 33 followed in the flow direction by a compressed air inlet from pipe 34 to agitate the sand.
  • a pipe 35 provides for pressure equalisation.
  • FIG 4 A preferred construction for the noszle assembly shown in Figure la is illustrated in Figure 4, and as shown the nozzle includes an inlet 40 for high pressure water and inlet 40a for sand which is fed from either the hopper of Figure 2a or the compressed air supply pot of Figure 3.
  • the high pressure water issues through a small orifice 41 into a collecting or entrainment chamber 42 whereby sand from the inlet 40a is mixed therewith.
  • the entrained sand and high pressure water passes through ceramic nozzle 43 and issues in the form of a high pressure jet 44 at the nozzle outlet.
  • Located around the nozzle 43 is a coaxial annular noszle chamber 47 which is fed with compressed air through an inlet 45.
  • the compressed air exhausts from an annular nozzle 46 which is positioned about the nozzle 43 and thus provides the improvement in the cleaning action of the water and sand jet.
  • the chamber 42 and nozzle 43 are mounted in a gas- tight manner within a housing 50 using a seal 51.
  • the housing has an insert body 52 mounted at the forward end and secured by bolts 53.
  • the insert body defines a coaxial air receiving chamber 54 feeding the nozzle chamber 47.
  • the compressed air pressure used will be of the order of 120 lb/in 2 and the water pressure applied is some 1000 lb/in 2 .
  • the compressed air pressure used for agitation is about 20 lb/in 2 an d the height of the hopper 21 above the nozzle is about 2 metres.
  • Figure 5 shows an alternative nozzle assembly wherein like parts to those in Figure 4 have the same reference numerals.
  • This embodiment however has a single feed 48 for a sand water pre-mixture. Operation is otherwise similar.
  • the premixed sand and water may be supplied by an arrangement as shown in Figure 2b, as example, wherein sand 205 is contained in a hopper 210 also containing water up to level 240.
  • the sand and water are agitated by compressed air feed in through nozzles 230 and along an aperture pipe 220.
  • the sand/water mixture is drawn out through pipe using a pump or air operated ejector device (not shown) and fed to inlet 48 of the nozzle shown in Figure 5.
  • modified versions include the arrangements previously described in conjunction with Figures lb and 1c, wherein the water/sand nozzle 43 is modified to give a diverging component to the flow or the compressed air exhaust 46 is adapted to give an inwardly directed jet or component of flow.
  • the high pressure water supply is passed through a small orifice prior to mixing with the abrasive and this causes a fall in pressure and hence a degree of suction for ingesting the abrasive into the nozzle.
  • the modified form of Figure 5 there is no need for high pressure water and the abrasive is contained in the water as a slurry which is then blasted on to the work piece as before.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

Un appareil à ajutage pour le nettoyage abrasif de structures comprend une entrée (48), par où entre un mélange de sable et d'eau et qui communique avec une chambre (42) conduisant à un ajutage (43). Afin d'améliorer l'action de nettoyage, on utilise une amenée d'air comprimé (45) destinée à alimenter un ajutage (47), lequel comporte une sortie (46) disposée coaxialement autour de la sortie de l'ajutage (43). Grâce à cet agencement, le jet d'eau auquel s'ajoute le sable entraîné est entouré par un jet d'air à haute vitesse, ce qui permet d'obtenir un meilleur nettoyage.
PCT/GB1987/000856 1986-12-03 1987-11-30 Procede et appareil de sablage abrasif par voie humide WO1988004220A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB868628930A GB8628930D0 (en) 1986-12-03 1986-12-03 Sand blasting
GB8628930 1986-12-03

Publications (1)

Publication Number Publication Date
WO1988004220A1 true WO1988004220A1 (fr) 1988-06-16

Family

ID=10608398

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1987/000856 WO1988004220A1 (fr) 1986-12-03 1987-11-30 Procede et appareil de sablage abrasif par voie humide

Country Status (3)

Country Link
AU (1) AU8324787A (fr)
GB (2) GB8628930D0 (fr)
WO (1) WO1988004220A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990008083A1 (fr) * 1989-01-11 1990-07-26 Abb Stal Ab Ejecteur avec arrivee peripherique du gaz propulseur
WO1992002349A2 (fr) * 1990-08-04 1992-02-20 Enlevement de matiere se trouvant sur des surfaces
EP0672502A1 (fr) * 1994-03-11 1995-09-20 Guyson International Ltd Dispositif pour l'application de moyens de sablage sur des articles
WO1997006923A1 (fr) * 1995-08-11 1997-02-27 Crycle Cryogenic C.V. Procede et appareil permettant de couper, abraser et forer au moyen de particules sublimables et de liquides a l'etat de vapeur
GB2359037A (en) * 2000-02-08 2001-08-15 Circle Technical Services Ltd Cutting apparatus and method
WO2012112056A1 (fr) * 2011-02-14 2012-08-23 Neodrill As Dispositif de traitement de surfaces sous-marines avec un agent abrasif
EP2801443A1 (fr) * 2013-05-07 2014-11-12 Phibo Industries BVBA Medium de traitement pour acier inox ou d'autres surfaces metalliques, procédé de traitement de telles surfaces utilisant un tel medium et buse pour fixations à un pistolet à jet
CN110281166A (zh) * 2019-06-06 2019-09-27 舟山市龙山船厂有限公司 一种环保型喷砂装置的喷头
US20220134666A1 (en) * 2020-11-05 2022-05-05 Arcam Ab Blast nozzles for additive manufacturing and methods for using the same

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2354726B (en) * 1999-10-01 2003-06-25 Uwg Ltd Abrasive cutting
US20060038044A1 (en) * 2004-08-23 2006-02-23 Van Steenkiste Thomas H Replaceable throat insert for a kinetic spray nozzle
CN101672424A (zh) * 2004-09-03 2010-03-17 尼特西绅有限公司 用于输送低温流体的系统和方法
NL1037571C2 (nl) * 2009-12-18 2011-06-21 Lasbedrijf Vink B V Systeem voor het stralen van objecten met een mengsel van vloeistof en abrasief.
US9108297B2 (en) 2010-06-21 2015-08-18 Omax Corporation Systems for abrasive jet piercing and associated methods
WO2012048047A1 (fr) * 2010-10-07 2012-04-12 Omax Corporation Dispositifs de perforation et / ou de découpe pour systèmes à jet d'eau abrasif, et systèmes and procédés associés
US9138863B2 (en) 2011-04-01 2015-09-22 Omax Corporation Particle-delivery in abrasive-jet systems
JP5746901B2 (ja) * 2011-04-14 2015-07-08 株式会社不二製作所 研磨方法及びブラスト加工装置のノズル構造
US8740669B2 (en) * 2011-07-28 2014-06-03 Omni Cubed, Inc. Damage prevention tool and method
US9586306B2 (en) 2012-08-13 2017-03-07 Omax Corporation Method and apparatus for monitoring particle laden pneumatic abrasive flow in an abrasive fluid jet cutting system
US8904912B2 (en) 2012-08-16 2014-12-09 Omax Corporation Control valves for waterjet systems and related devices, systems, and methods
US9492908B2 (en) 2013-01-25 2016-11-15 Omax Corporation Particle delivery apparatuses including control junctions for use in abrasive-jet systems and related apparatuses, systems, and methods
US9050704B1 (en) 2013-03-15 2015-06-09 Omax Corporation Abrasive-delivery apparatuses for use with abrasive materials in abrasive-jet systems and related apparatuses, systems, and methods
US11577366B2 (en) 2016-12-12 2023-02-14 Omax Corporation Recirculation of wet abrasive material in abrasive waterjet systems and related technology
US11554461B1 (en) 2018-02-13 2023-01-17 Omax Corporation Articulating apparatus of a waterjet system and related technology
US11224987B1 (en) 2018-03-09 2022-01-18 Omax Corporation Abrasive-collecting container of a waterjet system and related technology
CN109046820B (zh) * 2018-11-02 2019-08-02 山东大学 一种多级同步混粉器及热喷涂装置
EP4127479A1 (fr) 2020-03-30 2023-02-08 Hypertherm, Inc. Cylindre pour pompe à jet de liquide à extrémités longitudinales d'interface multifonctionnelles
WO2023117082A1 (fr) * 2021-12-22 2023-06-29 Ant Applied New Technologies Ag Système de découpe à abrasif liquide

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE49667C (de) * J. E. MATHEWSON in Sheffield, Nr. 266 Upper Thorpe (York, England) Neuerung an Sandstrahlgebläsen
US2369576A (en) * 1943-12-20 1945-02-13 Pangborn Corp Blast gun
GB658270A (en) * 1948-04-05 1951-10-03 Norman Ives Ashworth Improvements in or relating to abrasive blasting appliances
US2658312A (en) * 1951-01-26 1953-11-10 Leslie W Smith Spray gun nozzle for spraying buffing compounds
US2797530A (en) * 1954-08-17 1957-07-02 Pangborn Corp Sluriator
DE2253633A1 (de) * 1971-11-12 1973-05-17 Atlas Copco Ab Vorrichtung zum verspruehen von pulvern
DE2724318A1 (de) * 1977-05-28 1978-11-30 Peiniger Ernst Gmbh Verfahren und anlage zum druckluftstrahlen
US4478368A (en) * 1982-06-11 1984-10-23 Fluidyne Corporation High velocity particulate containing fluid jet apparatus and process

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB229956A (en) * 1924-09-19 1925-03-05 Arthur Mauterer Improvements relating to the treatment of surfaces under water
GB347560A (en) * 1929-11-13 1931-04-30 Stug Kohlenstaubfeuerung Paten An improved cleaning device for pulverised fuel furnaces

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE49667C (de) * J. E. MATHEWSON in Sheffield, Nr. 266 Upper Thorpe (York, England) Neuerung an Sandstrahlgebläsen
US2369576A (en) * 1943-12-20 1945-02-13 Pangborn Corp Blast gun
GB658270A (en) * 1948-04-05 1951-10-03 Norman Ives Ashworth Improvements in or relating to abrasive blasting appliances
US2658312A (en) * 1951-01-26 1953-11-10 Leslie W Smith Spray gun nozzle for spraying buffing compounds
US2797530A (en) * 1954-08-17 1957-07-02 Pangborn Corp Sluriator
DE2253633A1 (de) * 1971-11-12 1973-05-17 Atlas Copco Ab Vorrichtung zum verspruehen von pulvern
DE2724318A1 (de) * 1977-05-28 1978-11-30 Peiniger Ernst Gmbh Verfahren und anlage zum druckluftstrahlen
US4478368A (en) * 1982-06-11 1984-10-23 Fluidyne Corporation High velocity particulate containing fluid jet apparatus and process

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990008083A1 (fr) * 1989-01-11 1990-07-26 Abb Stal Ab Ejecteur avec arrivee peripherique du gaz propulseur
WO1992002349A2 (fr) * 1990-08-04 1992-02-20 Enlevement de matiere se trouvant sur des surfaces
WO1992002349A3 (fr) * 1990-08-04 1992-03-19 Robert Sidney Jackson Enlevement de matiere se trouvant sur des surfaces
EP0672502A1 (fr) * 1994-03-11 1995-09-20 Guyson International Ltd Dispositif pour l'application de moyens de sablage sur des articles
WO1997006923A1 (fr) * 1995-08-11 1997-02-27 Crycle Cryogenic C.V. Procede et appareil permettant de couper, abraser et forer au moyen de particules sublimables et de liquides a l'etat de vapeur
GB2359037A (en) * 2000-02-08 2001-08-15 Circle Technical Services Ltd Cutting apparatus and method
WO2012112056A1 (fr) * 2011-02-14 2012-08-23 Neodrill As Dispositif de traitement de surfaces sous-marines avec un agent abrasif
EP2801443A1 (fr) * 2013-05-07 2014-11-12 Phibo Industries BVBA Medium de traitement pour acier inox ou d'autres surfaces metalliques, procédé de traitement de telles surfaces utilisant un tel medium et buse pour fixations à un pistolet à jet
BE1021089B1 (nl) * 2013-05-07 2015-05-12 Phibo Industries Bvba Behandelingsmedium voor de behandeling van roestvrij staal of andere metalen oppervlakken, methode voor het behandelen van roestvrij staal of andere metalen oppervlakken gebruik makende van dergelijk behandelingsmedium en mondstuk ingericht om te worden gemonteerd op een behandelingspistool
CN110281166A (zh) * 2019-06-06 2019-09-27 舟山市龙山船厂有限公司 一种环保型喷砂装置的喷头
CN110281166B (zh) * 2019-06-06 2024-04-30 舟山市龙山船厂有限公司 一种环保型喷砂装置的喷头
US20220134666A1 (en) * 2020-11-05 2022-05-05 Arcam Ab Blast nozzles for additive manufacturing and methods for using the same

Also Published As

Publication number Publication date
GB8727944D0 (en) 1988-01-06
AU8324787A (en) 1988-06-30
GB2198975A (en) 1988-06-29
GB8628930D0 (en) 1987-01-07

Similar Documents

Publication Publication Date Title
WO1988004220A1 (fr) Procede et appareil de sablage abrasif par voie humide
US3994097A (en) Abrasive or sand blast apparatus and method
US6283833B1 (en) Method and apparatus for producing a high-velocity particle stream
US4666083A (en) Process and apparatus for generating particulate containing fluid jets
EP0526087A1 (fr) Buse pour nettoyage ou découpage par sablage
US4802312A (en) Wet sand blasting with pressurized water feed
US4369607A (en) Sand blasting apparatus
US4978073A (en) Apparatus for pneumatically discharging liquified building material containing a hardener
US4538941A (en) Rock duster apparatus
US4768314A (en) Apparatus for generating an abrasive fluid jet
US5857900A (en) Blast nozzle containing water atomizer
EP0137765B1 (fr) Pistolet de vaporisation
US6267540B1 (en) Device for creating a powder-air-mixture
US5224654A (en) Apparatus for pneumatically discharging liquified building material containing a hardener
US3814316A (en) Dryer feed nozzle assembly
GB2196279A (en) Pressurized blasting machine
US3434698A (en) Fluid mixing,moving and atomizing methods and apparatus
JPS6029540B2 (ja) サンドブラスト法及び装置
US4203688A (en) Method of unloading bulk materials from vessels
US5209915A (en) Method for flyash recycling in a dry SO2 scrubber
GB2159069A (en) Blasting nozzle
GB1521800A (en) Powder feeder pick-up tube
SU667392A1 (ru) Струйно-абразивный эжекционный аппарат
GB2158749A (en) Abrasive blasting nozzle
JPS605966A (ja) 吹付コンクリ−トに於ける液状混和剤の添加方法

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU BR DK FI JP KR NO SU US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LU NL SE