EP2512737B1 - Procédé et dispositif de nettoyage, d'activation et de prétraitement d'une pièce au moyen de particules de neige carbonique - Google Patents

Procédé et dispositif de nettoyage, d'activation et de prétraitement d'une pièce au moyen de particules de neige carbonique Download PDF

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Publication number
EP2512737B1
EP2512737B1 EP10793169.3A EP10793169A EP2512737B1 EP 2512737 B1 EP2512737 B1 EP 2512737B1 EP 10793169 A EP10793169 A EP 10793169A EP 2512737 B1 EP2512737 B1 EP 2512737B1
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EP
European Patent Office
Prior art keywords
carbon dioxide
mixing apparatus
dioxide fluid
carrier gas
feed
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.)
Active
Application number
EP10793169.3A
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German (de)
English (en)
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EP2512737A1 (fr
Inventor
Andreas Michalske
David Kleinelümern
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.)
Venjakob Maschinenbau GmbH and Co KG
Original Assignee
Venjakob Maschinenbau GmbH and Co KG
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Publication of EP2512737A1 publication Critical patent/EP2512737A1/fr
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Publication of EP2512737B1 publication Critical patent/EP2512737B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/003—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods using material which dissolves or changes phase after the treatment, e.g. ice, CO2

Definitions

  • the invention relates to a method and a device for cleaning, activating and pretreating workpieces by means of carbon dioxide snow particles, which are produced from a pressurized carbon dioxide fluid and at least one carrier pressure gas, wherein the carbon dioxide snow particles can be accelerated in an outlet nozzle and directed onto the workpiece.
  • a blasting method for cleaning surfaces in which in a beam line liquid carbon dioxide is supplied to a flowing carrier gas and is converted by relaxation in dry snow, and a device for producing dry ice, in particular for a blast cleaning of surfaces, comprising a feed line for carbon dioxide, a supply line for a carrier gas, a beam line for a dry snow gas mixture and a mixing region for the carbon dioxide and the carrier gas.
  • two process variants are distinguished, the so-called two-substance ring nozzle and the jet nozzle with agglomeration chamber.
  • the liquid carbon dioxide at the nozzle outlet of a first nozzle is expanded to ambient pressure.
  • the resulting carbon dioxide snow particles are made by a jacket jet, which consists of a second, the first nozzle concentric surrounding nozzle occurs, bundled from supersonic fast compressed air and accelerated.
  • the liquid carbon dioxide is the compressed air stream in a relaxation room, the so-called agglomeration chamber added.
  • the second process variant produces larger snow particles which are accelerated with the compressed air in a subsequent nozzle and lead to a significantly higher abrasiveness on the workpiece.
  • the object is achieved according to the method by the features of claim 1 and according to the device by the features of claim 4.
  • a method and a device for cleaning, activating or pretreating a workpiece by means of Carbon dioxide snow particles which are formed from a pressurized carbon dioxide fluid and at least one carrier pressure gas in a mixing device to which the carbon dioxide fluid and the carrier pressure gas are fed via separate feeders and wherein the carbon dioxide snow particles distribute and leave the mixing device via an outlet nozzle coupled to the mixing device, in the outlet nozzle accelerated and directed to the workpiece.
  • the feed device for the carbon dioxide fluid which opens into the mixing device does not precede an agglomeration chamber, nor does the feed device for the carbon dioxide fluid have an agglomeration chamber in which the liquid carbon dioxide fluid could be expanded prior to feeding into a mixing chamber, as in devices for producing carbon dioxide snow particles from the prior art ,
  • the invention has the advantages that, in the absence of an agglomeration chamber, unwanted agglomerates are not present, which in turn would lead to icing and clogging problems in the feed devices.
  • the apparatus according to the invention with the direct injection of liquid carbon dioxide fluid into the mixing device without prior relaxation of the carbon dioxide fluid and distribution in the carrier pressure gas, a particularly large amount of carbon dioxide snow particles is produced in small and solid form, which based on the projected area of the cleaning jet, a cleaning result can be achieved with very high quality.
  • further automation and acceleration in the production of carbon dioxide snow particles are achieved.
  • the device according to the invention allows considerable material savings, what in Compared to prior art blasting devices for miniaturization of the device according to the invention leads.
  • the carbon dioxide fluid is expediently fed centrically to the mixing device.
  • the feed device for the carbon dioxide fluid to project into the feed device opening into the mixing device via an edge-side boundary of the mixing device.
  • the feed device for the carbon dioxide fluid is arranged on the mixing device such that the feed end of the feed device facing the mixing device expediently ends in the center of the mixing device for the inflow of the carbon dioxide fluid into the mixing device.
  • the cleaning jet which comprises the carbon dioxide snow particles and the carrier compressed gas, is expediently set in rotation in the mixing device.
  • the rotation of the cleaning jet is achieved by a swirl insert arranged in the mixing device.
  • the effect of the swirl insert is in particular increased by the fact that it expediently extends within the mixing device from an inlet end for the carrier compressed gas to an outlet end.
  • the swirl insert is provided at an outlet end in the mixing device with a converging discharge opening and / or designed as such.
  • the feed device for the carbon dioxide fluid is expediently designed as a metering nozzle.
  • the amount and intensity of the carbon dioxide fluid supplied to the mixing device can be changed by adjusting the metering nozzle at the feed device for the carbon dioxide fluid or by using metering nozzles with different dimensions for the supply of carbon dioxide.
  • the feed end of the feed device for the carbon dioxide fluid is arranged in the direction of the outlet end of the mixing device in this.
  • the carrier compressed gas comprises at least air.
  • the mixing device and the outlet nozzle are integrally formed.
  • the mixing device is designed as a mixing chamber.
  • FIG. 1 shows a device 2 for cleaning, activating or pretreating workpieces (not shown) by means of carbon dioxide snow particles.
  • the apparatus 2 comprises a device wall 3, a mixing device 4, at the inlet end 6 of the mixing device 4 provided feeders 8 and 10 for the carbon dioxide fluid or for the carrier gas pressure and a provided at an outlet end 12 of the mixing device 4 outlet nozzle 14.
  • the Mixing device 4, the feeders 8, 10 and the outlet nozzle 14 integrally formed.
  • the feed device for the carbon dioxide fluid is provided as a separate component to the mixing device. If the feed device for the carbon dioxide fluid is formed separately, it can thus be exchanged for setting a metered quantity of the carbon dioxide fluid supplied to the mixing device and replaced by a feed device with a metering opening which is suitably dimensioned for the desired metering amount.
  • the feed device 8 for the carbon dioxide fluid has no expansion space or agglomeration chamber, but leads directly into the mixing device 4.
  • the feed device 8 for the carbon dioxide fluid ends with a feed end 16 in a central region or in the center of the mixing device 4.
  • the swirl insert 18 is arranged at the edge of the mixing device 4 and extending in the present embodiment from the inlet end 6 to the end of the spout 12 in the mixing device 4.
  • the swirl insert 18 for accelerating the mixture of carbon dioxide snow particles and carrier gas pressure similar to the formation of Outlet nozzle 14 on a converging discharge opening 20.
  • FIG. 2 shows in plan view a cross section through the device according to FIG. 1 along a plane 2-2 '.
  • the illustration of the cross section of the device 2 in the present embodiment shows radially from outside to inside the device wall 3, the swirl insert 18 as well as the discharge opening 20 of the swirl insert 18, which tapers in the direction of the outlet nozzle 14.
  • the mixing device 4 formed as a mixing chamber.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Nozzles (AREA)

Claims (14)

  1. Procédé de nettoyage, d'activation ou de prétraitement d'une pièce au moyen de particules de neige carbonique produites à partir d'un fluide de dioxyde de carbone sous pression et d'au moins un gaz porteur sous pression, le fluide de dioxyde de carbone étant amené via un dispositif d'amenée (8) à un dispositif de mélange (4) dans lequel le gaz porteur sous pression s'écoule et des particules de neige carbonique se forment et se répartissent dans le dispositif de mélange (4), les particules de neige carbonique et le gaz porteur étant amenés en rotation dans le dispositif de mélange (4) par le biais d'un insert tourbillonnant (18) s'y trouvant, puis étant accélérées dans une buse de sortie et amenées sur la pièce sans que le fluide de dioxyde de carbone soit détendu avant d'être amené dans le dispositif de mélange (4).
  2. Procédé selon la revendication 1, caractérisé en ce que le fluide de dioxyde de carbone est amené de façon centrée au dispositif de mélange (4).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la quantité de dosage du fluide de dioxyde de carbone amené dans le dispositif de mélange (4) peut varier.
  4. Dispositif (2) de nettoyage, d'activation ou de prétraitement d'une pièce au moyen de particules de neige carbonique, avec un dispositif de mélange (4) servant à la formation et à la répartition des particules de neige carbonique dans un gaz porteur sous pression s'écoulant dans le dispositif de mélange (4), avec des dispositifs d'amenée (8, 10) débouchant dans le dispositif de mélange (4) servant à l'amenée du fluide de dioxyde de carbone et du gaz porteur sous pression et avec une buse de sortie (14) servant à l'accélération d'un mélange composé de particules de neige carbonique et de gaz porteur sous pression, aucune chambre d'agglomération n'étant prévue pour détendre le fluide de dioxyde de carbone, caractérisé par la présence d'un insert tourbillonnant (18) dans le dispositif de mélange (4).
  5. Dispositif selon la revendication 4, caractérisé en ce que l'insert tourbillonnant (18) s'étend à l'intérieur du dispositif de mélange (4) pour l'essentiel d'une extrémité d'amenée (6) prévue pour le gaz porteur sous pression jusqu'à une extrémité de sortie (12) prévue pour le mélange composé des particules de neige carbonique et du gaz porteur sous pression.
  6. Dispositif selon la revendication 4 ou 5, caractérisé en ce que l'insert tourbillonnant (18) forme une ouverture de décharge (20) convergente au niveau d'une extrémité de sortie (12) prévue pour le mélange de particules de neige carbonique et de gaz porteur sous pression.
  7. Dispositif selon l'une quelconque des revendications 4 à 6, caractérisé en ce que le dispositif d'amenée (8) de fluide de dioxyde de carbone prend la forme d'une buse de dosage.
  8. Dispositif selon la revendication 7, caractérisé en ce que la quantité de dosage du fluide de dioxyde de carbone à ajouter en dose connue au dispositif de mélange (4) peut être réglée via le dispositif d'amenée (8).
  9. Dispositif selon la revendication 8, caractérisé en ce que le dispositif d'amenée (8) de fluide de dioxyde de carbone est réalisé de façon amovible pour permettre le réglage de la quantité de dosage du fluide de dioxyde de carbone à ajouter en dose connue au dispositif de mélange (4).
  10. Dispositif selon l'une quelconque des revendications 4 à 9, caractérisé en ce que le dispositif d'amenée (8) de fluide de dioxyde de carbone est disposé dans le dispositif de mélange (4) avec une extrémité d'amenée (16) débouchant dans celui-ci en direction d'une extrémité de sortie (12) du dispositif de mélange (4).
  11. Dispositif selon l'une quelconque des revendications 4 à 10, caractérisé en ce que le dispositif d'amenée (8) de fluide de dioxyde de carbone est réalisé avec une extrémité d'amenée (16) débouchant dans le dispositif de mélange (4) saillant dans ce dernier au-delà d'une délimitation placée du côté de bordure du dispositif de mélange (4).
  12. Dispositif selon l'une quelconque des revendications 4 à 11, caractérisé en ce que le gaz porteur sous pression comprend au moins de l'air.
  13. Dispositif selon l'une quelconque des revendications 4 à 12, caractérisé en ce que le dispositif de mélange (4) et la buse de sortie (14) sont réalisés d'un seul tenant.
  14. Dispositif selon l'une quelconque des revendications 4 à 13, caractérisé par la présence d'un dispositif de mélange (4) prenant la forme d'une chambre de mélange.
EP10793169.3A 2009-12-15 2010-12-15 Procédé et dispositif de nettoyage, d'activation et de prétraitement d'une pièce au moyen de particules de neige carbonique Active EP2512737B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009058211A DE102009058211B4 (de) 2009-12-15 2009-12-15 Verfahren und Vorrichtung zum Reinigen, Aktivieren und Vorbehandeln eines Werkstücks mittels Kohlendioxidschneepartikeln
PCT/EP2010/007701 WO2011082795A1 (fr) 2009-12-15 2010-12-15 Procédé et dispositif de nettoyage, d'activation et de prétraitement d'une pièce au moyen de particules de neige carbonique

Publications (2)

Publication Number Publication Date
EP2512737A1 EP2512737A1 (fr) 2012-10-24
EP2512737B1 true EP2512737B1 (fr) 2014-03-05

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EP10793169.3A Active EP2512737B1 (fr) 2009-12-15 2010-12-15 Procédé et dispositif de nettoyage, d'activation et de prétraitement d'une pièce au moyen de particules de neige carbonique

Country Status (4)

Country Link
EP (1) EP2512737B1 (fr)
DE (1) DE102009058211B4 (fr)
ES (1) ES2458552T3 (fr)
WO (1) WO2011082795A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019125443A1 (fr) 2017-12-20 2019-06-27 Halliburton Energy Services, Inc. Procédés de capture et de recyclage pour des matériaux de nettoyage non aqueux

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5184427A (en) * 1990-09-27 1993-02-09 James R. Becker Blast cleaning system
US5616067A (en) * 1996-01-16 1997-04-01 Ford Motor Company CO2 nozzle and method for cleaning pressure-sensitive surfaces
KR20040101948A (ko) * 2004-05-31 2004-12-03 (주)케이.씨.텍 표면세정용 승화성 고체입자 분사용 노즐 및 이를 이용한 세정방법
DE102005002365B3 (de) 2005-01-18 2006-04-13 Air Liquide Gmbh Strahlverfahren und Vorrichtung zur Reinigung von Oberflächen
DE202005018953U1 (de) * 2005-12-02 2007-04-12 Kim Bettina Austrittsdüse für eine Trockeneis-Strahlanlage
DE102006008959A1 (de) * 2006-02-23 2007-08-30 Hauni Maschinenbau Ag Reinigung von Trommeln in einer Maschine der Tabak verarbeitenden Industrie mittels Trockeneisstrahlen
DE102007014857A1 (de) * 2007-03-22 2008-09-25 Acp-Advanced Clean Production Gmbh Düse für die Vorbehandlung und Reinigung von Oberflächen mittels Kohlendioxidschnee

Also Published As

Publication number Publication date
EP2512737A1 (fr) 2012-10-24
WO2011082795A1 (fr) 2011-07-14
DE102009058211B4 (de) 2013-09-05
DE102009058211A1 (de) 2011-06-16
ES2458552T3 (es) 2014-05-06

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