EP0445104A2 - Méthode et dispositif pour l'entraînement de particules solides dans un jet fluide de coupage - Google Patents
Méthode et dispositif pour l'entraînement de particules solides dans un jet fluide de coupage Download PDFInfo
- Publication number
- EP0445104A2 EP0445104A2 EP91890037A EP91890037A EP0445104A2 EP 0445104 A2 EP0445104 A2 EP 0445104A2 EP 91890037 A EP91890037 A EP 91890037A EP 91890037 A EP91890037 A EP 91890037A EP 0445104 A2 EP0445104 A2 EP 0445104A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- solid particles
- cavity
- jet
- cutting
- carrier medium
- 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- Withdrawn
Links
- 238000005520 cutting process Methods 0.000 title claims abstract description 65
- 239000002245 particle Substances 0.000 title claims abstract description 58
- 239000007787 solid Substances 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000002156 mixing Methods 0.000 claims abstract description 30
- 230000009969 flowable effect Effects 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 6
- 238000005204 segregation Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims 1
- 239000000725 suspension Substances 0.000 claims 1
- 239000011796 hollow space material Substances 0.000 abstract 2
- 230000005484 gravity Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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 invention relates to a method for loading at least one flowable cutting jet with solid particles according to the preamble of claim 1 and a device, in particular for carrying out the method, according to the preamble of claim 9.
- Flowable cutting jets are produced by forcing a flowable medium, in particular water, through a nozzle at high pressure, converting potential energy into kinetic energy and achieving jet speeds of more than twice the speed of sound.
- Cutting beams of this type are used in particular for separating flat materials.
- the cutting beam can be loaded with solid particles or abrasive particles. Solid particles are fed to the cutting device, introduced into a mixing chamber and carried along in the focusing nozzle by the jet passing through the mixing chamber. The solid particles are usually conveyed into the mixing chamber by a negative pressure caused by the jet passing through.
- a storage container preferably at a higher level, is positioned near the cutting device or the cutting head, from which solid particles can be obtained with a short line can be fed to the lower-lying mixing room.
- the disadvantage here is that the cutting beam is loaded only after it has flowed through the line and, after the cutting beam flow has been interrupted, gravity forces cause solid particles to enter the mixing chamber and to displace the bore of the focusing nozzle. Sucking in liquid or backing up the particle feed line can require complex cleaning of the system.
- Such cutting systems are also mostly vertical for the above reasons, i.e. with the cutting jet directed largely vertically downwards, which represents a restriction of the possible application.
- EP-0223433-A1 Another known method for introducing solid particles into a flowable cutting jet (EP-0223433-A1) uses a device in which the feed line for the particles is designed to be closable by suitable means directly in front of the mixing chamber. However, an interruption in the movement of the particles by closing the line causes it to sink and can lead to the supply line being moved.
- the invention has for its object to provide a generic method in which immediately after a flowable cutting jet has emerged from a nozzle, the same is loaded with solid particles, and when the jet is switched off and on again, solid particles are fed into the mixing chamber for the latter Period of time is automatically interrupted and a new supply, even after longer downtimes, is carried out immediately and without interference and with a corresponding concentration and the cutting jet emerging from the cutting head can be used in any direction.
- solid particles are provided in a carrier medium in a cavity in the cutting head and are essentially prevented from segregating by gravity.
- This prevention of segregation is advantageously accomplished by moving the mixture.
- the movement takes place in a preferably annular cavity, the mixture being supplied at one point and the mixture being discharged at a further point, in particular by means of negative pressure, essentially in such a way that a lower pressure in the cavity itself than in the environment of the cutting head.
- Due to the negative pressure in the cavity for example, air is introduced through the channel of the focusing nozzle into the mixing room and flows through the supply channel (s) into the cavity. This prevents solid particles from being introduced into the mixing space.
- the jet If the jet is now let out of the nozzle, passes through the mixing chamber and exits through the focusing nozzle, this causes a negative pressure or a lower pressure than the negative pressure prevailing in the cavity, and the solid particles pass from the cavity into the mixing chamber through the feed channels sucked and the cutting beam loaded.
- the cutting jet is switched off, the lack of a suction effect increases the pressure in the mixing chamber and prevents the solid particles from passing through the feed channels.
- the mixture of solid particles and carrier medium can move through the cavity of the cutting head until the next time the cutting beam is switched on maintained or it can be emptied and / or cleaned by interrupting the particle supply to the carrier medium, the supply line and the cavity.
- Fig. 1 shows the section AB through the device in the axial direction.
- a nozzle device 1 with high-pressure-proof walls 12, 13 and a nozzle body 11 for forming a cutting jet is adjustably and detachably connected to an upper housing part 2.
- This housing part 2 has a bore 21 through which the cutting beam is directed.
- a focusing nozzle 4 with a channel 41 is held by elements 42.
- Under the nozzle device 1 is formed by cooperating recesses in the housing parts 2 and 3, a cavity 6 formed as an annular cavity, which is adjacent a feed line 61 and has a derivation 62 and is closed by means 63 between the inlet and outlet.
- the cavity 6 is connected to a mixing space 33 formed in the upper region of the focusing nozzle 4 by at least one feed channel 12 and has at least one mouth surface 31.
- Fig. 2 shows a plan view of the annular cavity 6 with lead 61, lead 62 and intervening closure means 63.
- the cavity 6 has three mouth surfaces 31, 31 ', 31 ⁇ of the feed channels 32, 32', 32 ⁇ , which have a star-shaped connection with the Form mixing room 33.
- solid particles are now introduced into the carrier medium through the feed line 61, moved further in the cavity 6 and discharged through the discharge line 62, and if the pressure in the cavity 6 is set lower than the ambient pressure of the cutting head, i.e. the discharge is carried out with a vacuum, e.g. Air sucked in through the channel 41 of the focusing nozzle 4 and through the mouth surfaces 31, 31 ', 31 ⁇ and prevents the particles from entering the feed channels 32, 32', 32 ⁇ .
- a vacuum e.g. Air sucked in through the channel 41 of the focusing nozzle 4 and through the mouth surfaces 31, 31 ', 31 ⁇ and prevents the particles from entering the feed channels 32, 32', 32 ⁇ .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT45090 | 1990-02-27 | ||
| AT450/90 | 1990-02-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0445104A2 true EP0445104A2 (fr) | 1991-09-04 |
| EP0445104A3 EP0445104A3 (en) | 1992-08-05 |
Family
ID=3490940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19910890037 Withdrawn EP0445104A3 (en) | 1990-02-27 | 1991-02-22 | Method and device for entraining solid particles in a fluidic cutting stream |
Country Status (1)
| Country | Link |
|---|---|
| EP (1) | EP0445104A3 (fr) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7547292B2 (en) | 2001-01-11 | 2009-06-16 | Powderject Research Limited | Needleless syringe |
| WO2018077576A1 (fr) * | 2016-10-25 | 2018-05-03 | Robert Bosch Gmbh | Dispositif de coupe par jet de fluide abrasif |
| CN109434695A (zh) * | 2018-12-18 | 2019-03-08 | 江苏富技腾机电科技有限公司 | 一种水切割机的供沙装置及水切割机 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0708758D0 (en) | 2007-05-04 | 2007-06-13 | Powderject Res Ltd | Particle cassettes and process thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4555872A (en) * | 1982-06-11 | 1985-12-03 | Fluidyne Corporation | High velocity particulate containing fluid jet process |
| DD257009A1 (de) * | 1987-01-19 | 1988-06-01 | Volkswerft Stralsund Veb | Flexibles bearbeitungssystem fuer fische |
| US4951429A (en) * | 1989-04-07 | 1990-08-28 | Flow Research, Inc. | Abrasivejet nozzle assembly for small hole drilling and thin kerf cutting |
-
1991
- 1991-02-22 EP EP19910890037 patent/EP0445104A3/de not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4555872A (en) * | 1982-06-11 | 1985-12-03 | Fluidyne Corporation | High velocity particulate containing fluid jet process |
| DD257009A1 (de) * | 1987-01-19 | 1988-06-01 | Volkswerft Stralsund Veb | Flexibles bearbeitungssystem fuer fische |
| US4951429A (en) * | 1989-04-07 | 1990-08-28 | Flow Research, Inc. | Abrasivejet nozzle assembly for small hole drilling and thin kerf cutting |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7547292B2 (en) | 2001-01-11 | 2009-06-16 | Powderject Research Limited | Needleless syringe |
| USRE43824E1 (en) | 2001-01-11 | 2012-11-20 | Powder Pharmaceuticals Inc. | Needleless syringe |
| WO2018077576A1 (fr) * | 2016-10-25 | 2018-05-03 | Robert Bosch Gmbh | Dispositif de coupe par jet de fluide abrasif |
| CN109434695A (zh) * | 2018-12-18 | 2019-03-08 | 江苏富技腾机电科技有限公司 | 一种水切割机的供沙装置及水切割机 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0445104A3 (en) | 1992-08-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE2355336C3 (de) | Auffänger für eine mit Flüssigkeitstropfen arbeitende Aufzeichnungsvorrichtung | |
| WO1998028085A1 (fr) | Dispositif de production d'aerosol | |
| DE3132291A1 (de) | Geraet zur bearbeitung, insbesondere reinigung, der oberflaeche von teilen, insbesondere von zaehnen | |
| DE68905728T2 (de) | Reinigungsapparat. | |
| DE3639139A1 (de) | Verfahren zur erhoehung der ausgegebenen pulvermenge an einer pulverbeschichtungsanlage sowie pulverbeschichtungsanlage | |
| DE1408841B2 (de) | Vorrichtung zur Erzeugung einer in eine Metallschmelze einzuführenden Feststoff t eilchen-Gas -Suspens ion | |
| DE112016000899T5 (de) | Düseneinrichtung und Oberflächenbearbeitungsverfahren mit einer Düseneinrichtung | |
| DE102015222456A1 (de) | Verfahren und Vorrichtung zum Herstellen eines dreidimensionalen Objekts | |
| CH629115A5 (en) | Appliance for producing spherical particles | |
| DE10196605B3 (de) | Vorrichtung zum Sortieren von Holzschnitzel in separate Fraktionen | |
| EP3248666B1 (fr) | Dispositif de séparation de gaz d'échappement contenant des particules | |
| EP0445104A2 (fr) | Méthode et dispositif pour l'entraînement de particules solides dans un jet fluide de coupage | |
| DE3516103A1 (de) | Mischkopf zum einbringen von abrasiven partikeln in einen hochdruckwasserstrahl | |
| DE1913708B2 (de) | Verfahren und Vorrichtung zum Trennen von körnigem Gut | |
| EP2033713B1 (fr) | Dispositif et procédé de séparation des particules solides plongeantes et flottantes à densités différentes | |
| EP1293255A2 (fr) | Procédé et dispositif de séparation de saletés de suspensions par flottation | |
| DE19615089C1 (de) | Flotationsverfahren und Vorrichtung zu seiner Durchführung | |
| DE1556654A1 (de) | Verfahren zur Abtrennung von Fehlteilchen bei der pneumatischen Foerderung und Vorrichtung zur Durchfuehrung des Verfahrens | |
| DE2321281A1 (de) | Verfahren zur abtrennung magnetisierbarer teilchen aus einem feinkoernigen feststoff und vorrichtung zur durchfuehrung des verfahrens | |
| DE10348805B4 (de) | Verfahren zur Erzeugung eines Wasserabrasivstrahls | |
| DE2417580A1 (de) | Verfahren und vorrichtung zum richten eines feste abriebpartikel enhaltenden fluessigkeitsstrahls auf die oberflaeche eines werkstuecks | |
| DE2642884C2 (de) | Verfahren und Vorrichtung zum Dispergieren und pneumatischen Zuführen feinkörnigen Gutes in die Sichtzone eines Windsichters | |
| DE1515240A1 (de) | Geraet oder Vorrichtung zum Bearbeiten von Materialien mit einem Strahl von geladenen Teilchen | |
| DE4313704C2 (de) | Vorrichtung zum Erzeugen eines mit einem Abrasivmittel versetzten Flüssigkeitsstrahles | |
| DE3707905C1 (en) | Process and apparatus for flotation, in particular for waste water purification |
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 |
|
| 17P | Request for examination filed |
Effective date: 19910301 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE |
|
| PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
| AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19930901 |