WO2003022525A2 - Procede et dispositif de decapage - Google Patents

Procede et dispositif de decapage Download PDF

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Publication number
WO2003022525A2
WO2003022525A2 PCT/EP2002/010128 EP0210128W WO03022525A2 WO 2003022525 A2 WO2003022525 A2 WO 2003022525A2 EP 0210128 W EP0210128 W EP 0210128W WO 03022525 A2 WO03022525 A2 WO 03022525A2
Authority
WO
WIPO (PCT)
Prior art keywords
blasting
adapter
medium
inlet
nozzle
Prior art date
Application number
PCT/EP2002/010128
Other languages
German (de)
English (en)
Other versions
WO2003022525A3 (fr
Inventor
Jens Werner Kipp
Original Assignee
Jens Werner Kipp
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
Priority claimed from DE20115013U external-priority patent/DE20115013U1/de
Application filed by Jens Werner Kipp filed Critical Jens Werner Kipp
Publication of WO2003022525A2 publication Critical patent/WO2003022525A2/fr
Publication of WO2003022525A3 publication Critical patent/WO2003022525A3/fr

Links

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/02—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
    • B24C3/06—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other movable; portable
    • 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

Definitions

  • the invention relates to a blasting method for cleaning surfaces, in which an additional blasting medium is fed from a pressure source into a stream of a blasting medium which carries an abrasive blasting medium, and an apparatus for carrying out the method.
  • Blasting devices are used to clean surfaces using a mostly gaseous blasting medium, to which an abrasive blasting agent such as sand or the like can be added. It is also known to use dry ice or dry snow as a blasting agent. This has the advantage that no expensive precautions need to be taken to dispose of the abrasive, since the abrasive evaporates after use. In addition, due to the low temperature of the blasting medium of approximately -78 ° C., the layers to be cleaned become brittle and subsequent effects, such as evaporation of the dry ice particles that have penetrated into the layer to be cleaned, result in an intensive cleaning effect.
  • EP 1 035 947 B1 describes blasting methods and devices which are used for cleaning the inside of pipes.
  • a Laval nozzle is provided as the jet nozzle, which is moved through the pipe to be cleaned.
  • the blasting medium is accelerated to almost the speed of sound or to supersonic speed.
  • the emerging jet is conically expanded by a deflecting body arranged downstream of the Laval nozzle, so that it strikes the surrounding pipe wall.
  • only one deflector is moved through the interior of the tube, and the blasting medium, to which dry ice is added as the blasting medium, is fed into the tube via an adapter attached to the tube end and passed through the tube.
  • the adapter also offers the possibility of supplying an additional blasting medium via a side connection, which is transported into the adapter with the aid of an additional blasting medium supplied by a pressure source.
  • the cleaning effect should be increased by adding the additional blasting agent, for example sand or granulate.
  • the jet emitted by a jet nozzle be fanned out as far as possible at high speed of the jet medium, for example air.
  • various nozzles are known which generate a fan-like or conically widened jet.
  • Conventional blasting systems in which the blasting medium (compressed air) is mixed with the blasting medium, in particular dry ice, can only produce limited air outputs, and the hoses used to supply the blasting medium and the blasting medium to the blasting nozzle can only absorb limited air outputs. This limitation limits the performance of the usual jet nozzles.
  • the object of the invention is therefore to provide a blasting method and a blasting device which allow a high blasting power and / or a wide fanning out of the blasting without causing excessive damage to the blasting medium.
  • This object is achieved in a method of the type mentioned at the outset in that the supply of the additional blasting medium takes place upstream of a blasting nozzle which has a constriction, and the pressure and volume outputs for the blasting media are coordinated with one another in such a way that the blasting medium is at the constriction the nozzle reaches at least approximately the speed of sound.
  • the supply of the additional blasting medium directly in front of the nozzle does not, at least not primarily, serve to supply a further blasting medium, but rather serves to accelerate the jet in front of and in the nozzle.
  • This additional acceleration of the medium in front of and in the blasting nozzle enables a wide fanning out of the jet without the blasting agent being damaged.
  • An expedient device for carrying out the method comprises an adapter with at least a first inlet, which is connected to a blasting system and to which a primary stream of a blasting medium mixed with a blasting medium can be fed from the blasting system, and at least a second inlet, to which an additional blasting medium from a Pressure source can be supplied, as well as with an outlet, through which the primary stream and the additional blasting medium emerge, and a blasting nozzle which directly adjoins the outlet of the adapter and has a constriction.
  • Dry ice or dry snow is preferably used as the blasting agent in the primary stream.
  • an additional blasting medium can optionally be supplied. It is also possible for the adapter to have a plurality of connections via which further blasting media and blasting media can be added.
  • the jet nozzle can be designed as a Laval nozzle or a Venturi nozzle. It can be designed to be rotationally symmetrical with respect to its longitudinal axis or, alternatively, can also be flattened, so that a fan-shaped expanded beam is generated.
  • the jet nozzle is preferably arranged directly behind the adapter. She can but also be connected to the adapter via a longer line.
  • the adapter is designed in such a way that the primary current is supplied via an inner tube which is arranged coaxially with the outlet of the adapter and which forms an annular space with the housing of the adapter, into which the second connection of the adapter opens and which coexists communicates with the outlet of the adapter.
  • the mouth of the inner tube which is preferably narrowed in the shape of a nozzle, is then flowed around by the additional blasting medium, so that the primary stream is accelerated effectively but gently and without damaging the blasting medium.
  • the annular space can also be connected to the inner tube via a ring of channels converging in the flow direction upstream of the mouth.
  • the adapter forms at least one constriction for the flow of the additional blasting medium.
  • This constriction can be formed at one or more of the following locations:
  • this inlet has a smaller cross section than the hose used to supply the additional blasting medium
  • a throttle device for example in the form of a ball valve, is preferably arranged at the second inlet of the adapter for coordinating the pressure and volume outputs.
  • the state of aggregation of the abrasive or abrasives used in the method according to the invention can be solid, liquid or gaseous or a combination of these states of aggregation. It has been shown that the addition of very small amounts of water to the primary or secondary stream leads to very good cleaning results. The cleaning effect is due on the one hand to the kinetic effect. The extremely high flow Speed of the blasting medium leads to a greatly increased kinetic effect - possibly even without the addition of blasting medium. Especially when water is added - here at the same time as an additional blasting medium as well as a blasting agent - the cavitation effect of the water that occurs with the design of the adapter and the blasting nozzle described here is added.
  • the combination of adapter and blasting nozzle is therefore mounted on a chassis designed in the manner of a hand truck, which is pushed or pulled over the surface to be cleaned and which keeps the nozzle of the blasting nozzle at a suitable distance from the surface to be cleaned , Due to the leverage effect of the chassis, the optimal angle of attack of the jet nozzle can be maintained better and more easily relative to the surface to be cleaned.
  • Figure 1 is a schematic representation of the overall structure of the blasting device
  • FIG. 2 shows a section through an adapter of the blasting device
  • Figure 3 shows a section through an adapter according to a modified embodiment
  • FIG. 6 shows a schematic illustration of the overall structure of a ner blasting device according to another embodiment
  • FIGS. 7 and 8 show a side view and a front view of a nozzle unit of the blasting device
  • FIG. 11 shows a section through a unit consisting of an adapter
  • the blasting device shown in FIG. 1 comprises a pressure source 10, a blasting system 12 and a nozzle unit 14, consisting of an adapter 16 and a blasting nozzle 18 firmly connected to it.
  • the pressure source 10 is, for example, a compressor which supplies the blasting system 12 with compressed air via a line 20.
  • the blasting system 12 is designed in a known manner to add a blasting agent, for example dry ice, to the compressed air serving as the blasting medium, so that a primary stream of the blasting medium and the blasting medium is fed to the adapter 16 via a line 22 formed, for example, by a hose.
  • the pressure source 10 supplies a secondary stream of the blasting medium (compressed air) via a line 24, which is also designed as a hose, directly to a second inlet of the adapter 16. The primary stream and the secondary stream are combined in the adapter 16.
  • the combined stream of sl medium and blasting medium is output at an increased flow rate via an outlet of the adapter 16 to the directly connected blasting nozzle 18, which expands the jet in a fan-shaped manner, so that a surface to be cleaned (not shown) has a relatively large working width the blasting medium can be irradiated and thereby cleaned.
  • the blasting nozzle 18 is designed, for example, as a Venturi nozzle or Laval nozzle and has a constriction that accelerates the jet of the blasting medium to almost the speed of sound or also to supersonic speed.
  • the adapter 16 has a tubular housing 26, the inner cross section tapers in a conical section 28 towards the outlet 30.
  • an inner tube 32 is arranged coaxially, which forms with the housing 26 an annular space 34 closed at the rear end.
  • An end of the inner tube 32 protruding from the housing 26 forms a first inlet 36 of the adapter, which is connected to the blasting system 12 via the line 22.
  • a second inlet 38 which is oriented at right angles to the axis of the housing and is connected to the pressure source 10 via the line 24, is formed in the peripheral wall of the housing 26.
  • the downstream end of the inner tube 32 lies in the region of the conical section 28 of the housing and is narrowed to form a nozzle 40.
  • the primary stream of blasting medium and blasting medium emerges from the inner tube 32 via the nozzle 40 and is combined with the secondary stream of the blasting medium which is supplied without swirling via the second inlet 38.
  • the combined stream enters the jet nozzle 18 via the outlet 30 at increased speed.
  • Figure 3 shows an adapter 16 'according to a modified embodiment.
  • the second inlet 38 is here shifted to the rear end of the housing 26, and the inner tube 32 is inserted into a block 42 which largely closes the annular space 34 downstream of the second inlet 38.
  • a ring of channels 44 converging in the direction of flow is formed, which connect the annular space 34 to the interior of the inner tube 32.
  • the secondary flow is here already supplied upstream of the nozzle 40 into the interior of the jet pipe 32 via the channels 44 (individual nozzles).
  • FIG. 4 shows a nozzle unit 14 ′ with an adapter 16 ′′, which has an essentially tubular housing.
  • the first inlet 36 and the second inlet 38 are formed here by Y-shaped tubes which open into the rear end of the adapter housing
  • the first inlet 26 is coaxial with the adapter housing, while the second inlet 38 enters at an angle.
  • the inner cross section of the tubular adapter housing is larger than the inner cross section of each of the first and second inlets 36, 38.
  • FIG. 5 shows an adapter 16 ′ ′′ with a cup-shaped housing 26.
  • the first inlet 36 is here arranged centrally and coaxially to the outlet 30, while the second inlet 38 is offset laterally and obliquely into the rear wall of the housing 26 entry.
  • FIG. 6 shows a blasting device according to a further exemplary embodiment, in which, in addition to the first blasting system 12, a second blasting system 46 is provided, with which it is possible to add a further blasting medium to the secondary stream supplied to the nozzle unit 14 via the line 24.
  • a further blasting medium for example, dry ice can be supplied via the first blasting system 12 and a stralil agent with a higher abrasion rate, for example granules, can be supplied via the second blasting system 46.
  • Both blasting systems 12, 46 are fed via lines 20, 48 from the pressure source ' ' 10.
  • the nozzle unit 14 can have any of the configurations described in the other exemplary embodiments.
  • the nozzle unit 14 Since the primary stream and the secondary stream are combined in the adapter 16 and accelerated to a higher speed and the combined stream is accelerated further in the jet nozzle 18, the nozzle unit 14 has a high recoil when working with the jet device. To improve handling, it is therefore expedient to mount the jet unit 14 on a sack-cart-like chassis, as shown in FIGS. 7 and 8.
  • the nozzle unit 14 is fastened here with clamping rails 50 to an elongated frame 52 which is provided at the lower end with two rollers 54 which roll on the surface to be cleaned during operation.
  • the fan-shaped widened jet nozzle 18 is arranged such that the cleaning jet 18 is emitted over the rollers 54 onto the surface to be cleaned.
  • First inlet 36 of the adapter 16 is extended to a tube which protrudes beyond the end of the frame 52.
  • the lines 22, 24 formed by hoses are not shown here.
  • the line 22 is connected to the rear end of the tubular first inlet 36.
  • a handle 56 for handling the device may be formed at the rear end of the frame 52 or at the rear end of the first inlet 36.
  • FIG. 9 shows a special embodiment of the adapter 16 shown in FIG. 2.
  • the inner tube 32 is held longitudinally adjustable in the rear wall of the housing 26 by means of an external thread 58. It is thus possible to vary the clear width of the passage between the nozzle 40 and the conical section 28 of the housing 26 and thus to create a variable constriction for setting the flow rate of the secondary flow. It has proven to be advantageous if, in this embodiment, the second inlet 38 opens at right angles and centrally into the annular space 34.
  • a throttle valve 60 for example a ball valve, at the first inlet 38, as shown in FIG.
  • FIG. 11 shows the nozzle unit 14 with the adapter 16 designed as in FIG. 10 and a fan-shaped blasting nozzle 18 which has a constriction 62 for accelerating the combined stream of blasting medium and blasting medium.
  • the line 24 is formed here by a hose with a cross section of 1 1/4 ", while the second inlet 38 has only a cross section of 3/4".
  • a first constriction is formed at the transition between the line 24 and the first inlet 38, the cross section of which can be further reduced using the throttle valve 60.
  • a second constriction for further acceleration of the secondary current is formed by the relatively small cross section of the annular space 34 here.
  • the secondary flow is accelerated again at the variable constriction that is formed between the nozzle 40 and the conical section 28 of the adapter housing.
  • the secondary flow thus has a high pressure and a high flow velocity, possibly even a supersonic velocity.
  • the constriction 62 which has a diameter of 14 mm, for example, the combined current is accelerated to almost the speed of sound or supersonic. Due to this high flow velocity, an effective expansion of the jet emitted by the jet nozzle 18 is achieved.
  • the jet nozzle 18 has a width of 160 mm, for example.
  • the jet nozzle 18 shown in FIG. 11 can optionally also be combined with each of the adapters 16 ', 16 "and 16"'.
  • the secondary flow of the blasting medium is preferably supplied via line 24 with a higher pressure and higher volume output than the primary flow which is supplied via first inlet 36.
  • the volume outputs are in a ratio of 3: 2.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)

Abstract

L'invention concerne un procédé de décapage de surfaces, consistant à acheminer, dans un courant d'un moyen de décapage qui entraîne un agent de décapage abrasif, un moyen de décapage supplémentaire au moyen d'un adaptateur (16), à partir d'une source de pression. L'invention est caractérisée en ce que l'apport du moyen de décapage supplémentaire a lieu directement en amont d'un buse de décapage (18) qui présente un étranglement (62), et en ce que le débit de pression et le débit volumétrique des moyens de décapage sont harmonisés de sorte que le moyen de décapage, au niveau de l'étranglement (62) de la buse de décapage (18), atteigne au moins approximativement la vitesse du son.
PCT/EP2002/010128 2001-09-11 2002-09-10 Procede et dispositif de decapage WO2003022525A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE20115013U DE20115013U1 (de) 2001-09-11 2001-09-11 Strahlvorrichtung
DE20115013.1 2001-09-11
DE20203073 2002-02-28
DE20203073.3 2002-02-28

Publications (2)

Publication Number Publication Date
WO2003022525A2 true WO2003022525A2 (fr) 2003-03-20
WO2003022525A3 WO2003022525A3 (fr) 2003-09-12

Family

ID=26057186

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/010128 WO2003022525A2 (fr) 2001-09-11 2002-09-10 Procede et dispositif de decapage

Country Status (1)

Country Link
WO (1) WO2003022525A2 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004023246B3 (de) * 2004-05-07 2005-10-27 Jens-Werner Kipp Strahlverfahren
DE102005005638B3 (de) * 2005-02-05 2006-02-09 Cryosnow Gmbh Verfahren und Vorrichtung zum Reinigen, Aktivieren oder Vorbehandeln von Werkstücken mittels Kohlendioxidschnee-Strahlen
WO2007125565A1 (fr) * 2006-05-02 2007-11-08 Sapio Produzione Idrogeno Ossigeno S.R.L. Dispositif de distribution pour machines de cryosablage et procede de traitement de surface
WO2008125648A1 (fr) * 2007-04-13 2008-10-23 Technische Universität Berlin Dispositif et procédé pour la projection de particules grâce à des particules de gaz surgelées
EP2151300A1 (fr) 2008-08-08 2010-02-10 Linde AG Dispositif et procédé de nettoyage d'objets à l'aide de neige carbonique
JP2013027969A (ja) * 2011-07-28 2013-02-07 Showa Denko Gas Products Co Ltd 粒子ブラスト装置
EP2926951A1 (fr) 2014-04-01 2015-10-07 Technische Universität Kaiserslautern Procédé de nettoyage et d'activation simultanés de surfaces de composants par une combinaison de pulvérisation de neige carbonique et d'application de substances adhésives
CN107263336A (zh) * 2016-04-05 2017-10-20 昭和电工气体产品株式会社 抛丸装置用附件及抛丸装置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4342425A (en) * 1980-04-10 1982-08-03 Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of National Defence Cavitation nozzle assembly
US4817342A (en) * 1987-07-15 1989-04-04 Whitemetal Inc. Water/abrasive propulsion chamber
FR2630668A1 (fr) * 1988-04-28 1989-11-03 Commissariat Energie Atomique Procede et dispositif de fabrication de billes de glace et application a la projection de ces billes de glace pour les traitements de surface
US4924643A (en) * 1988-02-12 1990-05-15 Carboxyque Francaise Method and apparatus for the treatment of work pieces by shot blasting
EP0672502A1 (fr) * 1994-03-11 1995-09-20 Guyson International Ltd Dispositif pour l'application de moyens de sablage sur des articles
US5509849A (en) * 1994-04-18 1996-04-23 Church & Dwight Co., Inc. Blast nozzle for water injection and method of using same for blast cleaning solid surfaces
US5779523A (en) * 1994-03-01 1998-07-14 Job Industies, Ltd. Apparatus for and method for accelerating fluidized particulate matter
WO1999029470A1 (fr) * 1997-12-05 1999-06-17 Jens Werner Kipp Procede de grenaillage pour le nettoyage de canalisations
DE19830397A1 (de) * 1998-07-08 2000-01-20 Diw Instandhaltung Gmbh Vorrichtung und Verfahren zum Reinigen von Vulkanisierformen

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4342425A (en) * 1980-04-10 1982-08-03 Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of National Defence Cavitation nozzle assembly
US4817342A (en) * 1987-07-15 1989-04-04 Whitemetal Inc. Water/abrasive propulsion chamber
US4924643A (en) * 1988-02-12 1990-05-15 Carboxyque Francaise Method and apparatus for the treatment of work pieces by shot blasting
FR2630668A1 (fr) * 1988-04-28 1989-11-03 Commissariat Energie Atomique Procede et dispositif de fabrication de billes de glace et application a la projection de ces billes de glace pour les traitements de surface
US5779523A (en) * 1994-03-01 1998-07-14 Job Industies, Ltd. Apparatus for and method for accelerating fluidized particulate matter
EP0672502A1 (fr) * 1994-03-11 1995-09-20 Guyson International Ltd Dispositif pour l'application de moyens de sablage sur des articles
US5509849A (en) * 1994-04-18 1996-04-23 Church & Dwight Co., Inc. Blast nozzle for water injection and method of using same for blast cleaning solid surfaces
WO1999029470A1 (fr) * 1997-12-05 1999-06-17 Jens Werner Kipp Procede de grenaillage pour le nettoyage de canalisations
DE19830397A1 (de) * 1998-07-08 2000-01-20 Diw Instandhaltung Gmbh Vorrichtung und Verfahren zum Reinigen von Vulkanisierformen

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004023246B3 (de) * 2004-05-07 2005-10-27 Jens-Werner Kipp Strahlverfahren
DE102005005638B3 (de) * 2005-02-05 2006-02-09 Cryosnow Gmbh Verfahren und Vorrichtung zum Reinigen, Aktivieren oder Vorbehandeln von Werkstücken mittels Kohlendioxidschnee-Strahlen
US7967664B2 (en) 2005-02-05 2011-06-28 Cryosnow Gmbh Device and process for cleaning, activation or pretreatment of work pieces by means of carbon dioxide blasting
WO2007125565A1 (fr) * 2006-05-02 2007-11-08 Sapio Produzione Idrogeno Ossigeno S.R.L. Dispositif de distribution pour machines de cryosablage et procede de traitement de surface
WO2008125648A1 (fr) * 2007-04-13 2008-10-23 Technische Universität Berlin Dispositif et procédé pour la projection de particules grâce à des particules de gaz surgelées
EP2151300A1 (fr) 2008-08-08 2010-02-10 Linde AG Dispositif et procédé de nettoyage d'objets à l'aide de neige carbonique
DE102008037089A1 (de) 2008-08-08 2010-02-11 Linde Ag Vorrichtung und Verfahren zum Reinigen von Gegenständen mittels Trockenschnee
JP2013027969A (ja) * 2011-07-28 2013-02-07 Showa Denko Gas Products Co Ltd 粒子ブラスト装置
EP2926951A1 (fr) 2014-04-01 2015-10-07 Technische Universität Kaiserslautern Procédé de nettoyage et d'activation simultanés de surfaces de composants par une combinaison de pulvérisation de neige carbonique et d'application de substances adhésives
CN107263336A (zh) * 2016-04-05 2017-10-20 昭和电工气体产品株式会社 抛丸装置用附件及抛丸装置

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