EP0179774A1 - Procede et appareil pour soumettre des pieces, des elements de construction ou analogues a un jet d'air charge de particules granuleuses - Google Patents

Procede et appareil pour soumettre des pieces, des elements de construction ou analogues a un jet d'air charge de particules granuleuses

Info

Publication number
EP0179774A1
EP0179774A1 EP19850900464 EP85900464A EP0179774A1 EP 0179774 A1 EP0179774 A1 EP 0179774A1 EP 19850900464 EP19850900464 EP 19850900464 EP 85900464 A EP85900464 A EP 85900464A EP 0179774 A1 EP0179774 A1 EP 0179774A1
Authority
EP
European Patent Office
Prior art keywords
water vapor
blasting
carrier air
steam
line
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Withdrawn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
EP19850900464
Other languages
German (de)
English (en)
Inventor
Karl Heinz Kiess
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.)
Druckluft-Und Vakuumtechnik Ing Heinz Kiess & Co KG GmbH
Original Assignee
Druckluft-Und Vakuumtechnik Ing Heinz Kiess & Co KG GmbH
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 Druckluft-Und Vakuumtechnik Ing Heinz Kiess & Co KG GmbH filed Critical Druckluft-Und Vakuumtechnik Ing Heinz Kiess & Co KG GmbH
Publication of EP0179774A1 publication Critical patent/EP0179774A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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

Definitions

  • the invention relates to a method for blasting workpieces, structural parts and. Like., wherein a granular abrasive is introduced into a carrier air stream, accelerated and blown against the workpiece and water vapor is introduced into the loaded carrier air stream in an adjustable amount. Furthermore, the invention is concerned with a device which is particularly suitable for carrying out the method.
  • the blasting of workpieces, structural parts, steel bridges u. The like. with a dry granular blasting medium has the disadvantage of a strong dust development in the radiation area.
  • a liquid additive in the carrier air stream loaded with the blasting agent namely water.
  • this procedure has the considerable disadvantage that irradiated workpieces or structural parts made of steel are briefly corrosive due to the action of the water. dieren.
  • the invention is based on the object of further developing a method of the generic type in such a way that the additive wetting the abrasive does not cause corrosion on the surface to be treated in a simple manner and this surface dries briefly after the treatment.
  • Another object is to provide a device suitable for carrying out the improved method.
  • the object on which the method is based is achieved in that the vapor pressure of the water vapor at the point of introduction is greater than the air pressure of the carrier air and the temperature of the water vapor is between approximately 150 ° C. and 250 ° C.
  • the vapor pressure of the water vapor at the point of introduction is greater than the air pressure of the carrier air and the temperature of the water vapor is between approximately 150 ° C. and 250 ° C.
  • the amount of water vapor to be introduced into the carrier air stream can be adjusted continuously, so that this also supports the best possible wetting of the blasting medium and drying of the treated surface.
  • the stepless adjustment and the selection of the steam temperature can be adapted to the properties of the blasting media and the pressure and temperature conditions within the carrier air, blasting media and water vapor system. Likewise, it can be adapted to various atmospheric humidity levels to which the surface to be treated is exposed.
  • shutting off the water vapor supply it is possible, if necessary, to work with a non-wetted blasting medium, or, if the blasting medium supply is prevented, it can also be irradiated with pure compressor air. Conversely, if the carrier air is switched off, only water vapor radiation can take place.
  • the water vapor can be wet, saturated or overheated. Particularly suitable temperatures are between about 150 ° C and 250 ° C. At higher temperatures the cost increases and at low temperatures there is a risk that a desired one Drying is not done quickly enough. If circumstances permit, higher or lower temperatures can also be selected for the water vapor.
  • a device for blasting workpieces, structural parts and the like.
  • a granular abrasive carrier air stream " which consists of a compressor, a compressed air line, to which a blasting agent container provided with a metering device is connected, and a steam generator, the steam line of which is connected to the compressed air line via a controllable throttle valve one behind the junction of the
  • Abrasive container lying point is connected.
  • a mixing chamber with a diffuser-like and a nozzle-like section is provided in the compressed air line at a point behind the junction point of the blasting agent container, into which the steam line at the Point where the pressure of the carrier air is lowest.
  • a device suitable for carrying out the method is shown in the drawing, for example; it shows:
  • Fig. 1 shows the essential parts of a device for
  • FIG. 2 shows a portable device in a side view
  • 3 shows the object of FIG. 2 in a plan view from above
  • Fig. 4 shows the subject of Fig. 2 in a view from the left side.
  • FIG. 1 The device schematically shown in FIG. 1 for blasting workpieces, structural parts, in particular steel structures such as steel bridges, halls, large machines, etc., has a compressor 1, which is either equipped with a separate chassis (FIG. 1) or more directly Part of the usually portable device is (Fig. 2).
  • the compressor 1 is connected to a compressed air line 2 to which an abrasive container 3 provided with a metering device 4 is connected.
  • a tubular compressed air line 2 is connected to a blasting nozzle 6 via a coupling member 5 and a blasting hose.
  • the mixing chamber 10 consists of a diffuser-like section, in which the carrier air supplied by the compressor 1 slows down, and of a nozzle-like section, in which the mixture of carrier air, blasting agent and water vapor is accelerated again.
  • the water vapor is expediently supplied in the region of the mixing chamber in which the pressure of the carrier air is the lowest.
  • the throttle valve 9 is infinitely adjustable from the closed position until the flow cross section is fully released. It is also provided with a servomotor which can be controlled, for example, by the person operating the jet nozzle 6.
  • the steam generator 7 is assigned conventional devices for the preparation and delivery of the feed water.
  • two water tanks 11 with a softener 12 are provided.
  • the connecting line to the water network or the like is designated by 13.
  • the two water tanks 11 can each be provided with a filling and metering device for introducing additives, of which only the feed pipes 14 are indicated in FIG. 1.
  • FIGS. 2 to 4 The embodiment according to FIGS. 2 to 4 is transportable, with all components being accommodated in a container-like frame 17, for example. Only the compressor 1 is arranged on the frame 17.
  • the scaffold 17 can also be equipped with protective wall and cover plates' for installation outdoors.
  • FIG. -2-4 continues to let the water pump 15 for the feed water and "a feed pipe 16 detect which processing to the Dampflei- 8 is connected and for the purpose of Suite ⁇ water preheating steam via a feed pipe 16 and a control valve in the Conducts water tank 11.
  • the steam generator 7 can be heated electrically or by firing with gas, oil or coal.
  • the steam generator can be selected for different steam outputs.
  • a suitable embodiment provides, for example, an amount of steam of 8 to 20 kg per hour for each connected jet nozzle 6, the water vapor having a temperature between approximately 150 ° C. to 250 ° C. and a pressure between approximately 5 to 25 bar.
  • the amount of carrier air can be 1 to 20 m 3 / min and the pressure of the carrier air can be somewhat lower between about 4 to 15 bar.
  • a steam generator 7 having a corresponding output is to be selected so that it can supply all carrier air flows with water vapor via corresponding throttle valves 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles (AREA)

Abstract

Pour traiter des pièces, des éléments de construction ou analogues, un jet d'air est chargé de particules granuleuses, accéléré et soufflé contre les pièces, un additif humidifiant étant ajouté au jet d'air. Pour éviter la corrosion des surfaces traitées et accélérer leur séchage, de la vapeur d'eau est utilisée comme additif. L'appareil pour la mise en oeuvre du procédé comporte un compresseur (1), une conduite sous pression (2) sur laquelle débouche un dispositif de dosage (4) associée au récipient (3) contenant le moyen abrasif. La vapeur obtenue d'un générateur de vapeur (7) est amenée par une conduite (8), à travers une vanne de commande (9), à la conduite sous pression (2). La vapeur est introduite dans la conduite sous pression après le récipient d'abrasif (3).
EP19850900464 1984-04-11 1984-12-22 Procede et appareil pour soumettre des pieces, des elements de construction ou analogues a un jet d'air charge de particules granuleuses Withdrawn EP0179774A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843413576 DE3413576A1 (de) 1984-04-11 1984-04-11 Verfahren und geraet zum abstrahlen von werkstuecken, bauwerken u.dgl. mittels eines mit einem koernigen strahlmittel beladenen traegerluftstromes
DE3413576 1984-04-11

Publications (1)

Publication Number Publication Date
EP0179774A1 true EP0179774A1 (fr) 1986-05-07

Family

ID=6233234

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850900464 Withdrawn EP0179774A1 (fr) 1984-04-11 1984-12-22 Procede et appareil pour soumettre des pieces, des elements de construction ou analogues a un jet d'air charge de particules granuleuses

Country Status (5)

Country Link
EP (1) EP0179774A1 (fr)
JP (1) JPS61501833A (fr)
AU (1) AU3831685A (fr)
DE (1) DE3413576A1 (fr)
WO (1) WO1985004614A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992010335A1 (fr) * 1990-12-07 1992-06-25 Kievsky Institut Grazhdanskoi Aviatsii Imeni 60-Letia Sssr Procede de nettoyage hydroabrasif de surface d'articles
DE4440146C2 (de) * 1994-11-10 1999-07-22 Kaercher Gmbh & Co Alfred Strahlvorrichtung zur Reinigung von Gegenständen
DE19747838C2 (de) 1997-10-19 2001-07-12 Gp Granulate Pneumatic Geraete Verfahren und Vorrichtung zum trockenen Entfernen von Beschichtungen, Graffiti oder sonstigen oberflächlichen Verunreinigungen
DE10311137B4 (de) * 2003-03-12 2008-07-10 Elma Hans Schmidbauer Gmbh & Co Kg Strahlgerät
DE102007027944B4 (de) 2007-06-18 2016-02-04 Werner Meissner Verfahren und Einrichtung zum Reinigen von Gegenständen in einer Behandlungskammer
ITPR20110072A1 (it) * 2011-08-05 2013-02-06 Lavorwash Spa Dispositivo di abrasione di materiale da una superficie
US10858740B2 (en) 2015-09-24 2020-12-08 Siemens Aktiengesellschaft Systems and methods for modifying surfaces of substrates

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE521609A (fr) *
US2114573A (en) * 1936-04-04 1938-04-19 George F Rhodes Sand blasting process
US2376616A (en) * 1944-01-18 1945-05-22 Metalweld Inc Sandblasting apparatus
US2587184A (en) * 1949-05-09 1952-02-26 Alvin L Marjama Sandblast nozzle
FR1046051A (fr) * 1951-11-30 1953-12-03 Procédé et installation de sablage
US3922817A (en) * 1974-10-21 1975-12-02 Otto Wemmer Combined steam and abrasive material cleaning device
GB1571508A (en) * 1977-02-17 1980-07-16 Kelsall T Wet blast cleaning
DE2724318C2 (de) * 1977-05-28 1984-09-20 Ernst Peiniger GmbH Unternehmen für Bautenschutz, 4300 Essen Verfahren zum Befeuchten des Strahlmittels beim Druckluftstrahlen
DE3127035A1 (de) * 1981-07-09 1983-01-27 Ernst Peiniger GmbH Unternehmen für Bautenschutz, 4300 Essen "verfahren zum druckluftstrahlen"

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8504614A1 *

Also Published As

Publication number Publication date
JPS61501833A (ja) 1986-08-28
DE3413576A1 (de) 1985-10-24
WO1985004614A1 (fr) 1985-10-24
AU3831685A (en) 1985-11-01

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Inventor name: KIESS, KARL, HEINZ