EP2755800B1 - Vorrichtung zum strahlen von trockeneis, insbesondere karbonisches trockeneis - Google Patents

Vorrichtung zum strahlen von trockeneis, insbesondere karbonisches trockeneis Download PDF

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Publication number
EP2755800B1
EP2755800B1 EP12756772.5A EP12756772A EP2755800B1 EP 2755800 B1 EP2755800 B1 EP 2755800B1 EP 12756772 A EP12756772 A EP 12756772A EP 2755800 B1 EP2755800 B1 EP 2755800B1
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EP
European Patent Office
Prior art keywords
nozzle
neck
particles
convergent
divergent
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
EP12756772.5A
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English (en)
French (fr)
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EP2755800A1 (de
Inventor
Philippe GOMEZ
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.)
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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Application filed by LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Publication of EP2755800A1 publication Critical patent/EP2755800A1/de
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    • 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
    • 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 present invention relates to a device for blasting dry ice, in particular dry ice.
  • Dry ice blasting is effective in the combination of different effects, a mechanical effect due to the kinetic energy of the ice particles, a thermal effect due to the temperature of the particles and a blast effect due to the sublimation of the ice in contact with the surface to be cleaned. It also has the advantage of not leaving residues. Indeed, after sublimation, the dry ice, transformed into gas, evacuates itself.
  • Such devices are particularly suitable for projecting the flow of ice particles in a direction orthogonal to the surface to be cleaned. Difficulties arise when it is desired to project the fluid in an inclined direction, particularly in the case of surface to be cleaned having a complex profile.
  • a first solution to solve this problem would be to tilt the device in the desired direction but, given their size, it would cause problems overhang.
  • Another solution would be to direct the flow out of the nozzle but it would create losses that would greatly degrade the cleaning performance. Indeed, the flow of ice particles, greatly accelerated after passage through the nozzle, is particularly sensitive to any disturbances.
  • the invention defined in claim 1, is intended to improve the situation and proposes for this purpose a dry ice particle projection device, in particular for cleaning surfaces, comprising a gun, for orienting a driving fluid driving said particles in a first direction, and a projection nozzle, allowing the passage of said driving fluid, charged with said particles, said nozzle comprising a neck.
  • said device is configured to orient the fluid, charged with said particles, in at least one other direction upstream of the neck, according to the direction of flow of the driving fluid.
  • section is used in the following to mean the section of the nozzle in a plane orthogonal to the main direction in which the nozzle conducts the fluid passing through it.
  • said nozzle comprises a divergent allowing acceleration of said driving fluid according to said one or more other directions.
  • Said divergent extends between the neck and an outlet orifice of the nozzle, the ratio between the surface of the neck and the surface of said outlet orifice of the nozzle being, for example, greater than 0.2, especially greater than 0.5. , in particular greater than 0.73. Said ratio will, for example, be less than 0.9.
  • the applicant has indeed found, following numerous tests, that such a divergent allowed to limit the consumption of carrier fluid while obtaining very good cleaning results, especially in terms of eliminating greasiness present on objects to clean.
  • the invention will more generally find its applications for the cleaning of fine pollution, thickness less than 3 mm, among others. It also allows the use of nozzles of limited size, including the nozzles having divergents whose length between the neck and the outlet orifice of the nozzle is less than 50 mm.
  • said divergent portion has a rectangular section.
  • said divergent has a circular section.
  • the neck may then have a circular section.
  • angle of divergence will have the following meaning in the following.
  • the angle corresponding to the slope of increase of said length l of the divergent For the nozzles whose divergent has a round section, it is the angle at the top of the cone bearing the truncated cone forming the divergent.
  • the divergent device according to the invention has a divergence angle ⁇ of the order of 6 °. This gives a high cleaning efficiency.
  • said divergent has a divergence angle ⁇ greater than 7 °, in particular greater than 15 °.
  • a flared jet is then obtained with an enlarged impact surface.
  • the length L of the divergent measured between the neck and the outlet orifice of the nozzle, the length S of the section of the divergent at said nozzle outlet and the divergence angle ⁇ follow the following law: 0 , 05 ⁇ I s / tan ⁇ ⁇ The ⁇ 0 , 4 ⁇ I s / tan ⁇ .
  • said neck is a sonic neck.
  • the convergent and the divergent are, for example, connected directly to one another at the neck.
  • the outlet orifice of the nozzle is at the level of the neck.
  • Such a nozzle has less cleaning performance than the previous but remains interesting in that it also allows a reduction in the carrier fluid consumption.
  • the invention also relates to a nozzle of a projection device as described above.
  • the invention relates to a device for blasting dry ice particles, for example dry ice, in particular for cleaning surfaces.
  • Said device comprises a gun 10, for directing a driving fluid driving said particles in a first direction, marked D1, and a projection nozzle 4, allowing the passage of said driving fluid, charged said particles.
  • Said driving fluid is, for example, compressed air.
  • the gun 10 is provided, in particular, with a supply 1 of driving fluid, a supply 2 of liquid carbon dioxide and a chamber 3 for the formation of dry ice particles (not shown in FIG. figure 2 ).
  • the nozzle 4 is connected to the gun 10, and projects, under the action of the driving fluid, the particles formed in the chamber 3.
  • the working fluid enters the device through the supply 1 of the driving fluid and then charges the ice particles generated in the chamber 3, at the exhaust of said chamber. This forms a flow of motor fluid and ice particles that passes through the nozzle 4 to be projected on the part to be cleaned.
  • said device is configured to orient the fluid, charged with said particles, in at least one other direction, marked D2, upstream of a neck 6 of the nozzle 4, according to the direction of flow of the driving fluid.
  • the angle between said first direction D1 and said other direction D2 is about 45 °.
  • the nozzle 4 comprises a convergent 8, intended to be located upstream of the neck 6 in the direction of flow of the driving fluid, and said device is configured to orient the fluid in the direction D2 upstream of said convergent 8.
  • the nozzle 4 which is configured to deflect the driving fluid, charged with said particles, in the direction D2.
  • the nozzle 4 comprises a deflection portion 22, adapted to modify the path of said driving fluid, charged with said particles, of said first direction D1 in the direction D2, said deflection portion 22 being located upstream of the neck 6.
  • the nozzle 4 comprises a convergent 8 and said deflection portion 22 is situated at the level of said convergent 8.
  • the nozzle 4 comprises, for example, a portion 23 of constant section, intended to be located upstream of the convergent 8 in the direction of flow of the driving fluid, said portion 23 of constant section being able to guide the driving fluid, charged said particles, in said first direction D1.
  • Said portion 23 of constant section is here connected to the convergent by a plane 24, inclined with respect to the direction D1 and orthogonal to the direction D2.
  • the portion of the nozzle 4 located downstream forms an acceleration portion.
  • said nozzle 4 comprises a divergent 7 allowing an acceleration of said driving fluid in the direction D2.
  • Said divergent 7 extends, for example, between the neck 6 and an outlet orifice of the nozzle 5.
  • the neck 6 and said outlet 5 of the nozzle 4 are, for example, orthogonal to the direction of the driving fluid, charged with said particles.
  • the ratio between the surface of the neck 6 and the surface of said outlet orifice 5 of the nozzle is, for example, greater than 0.2, especially 0.5, in particular 0.73. It will be, for example, less than 0.9. The applicant has indeed found that such a size choice allows an adequate acceleration of the particles for reduced consumption of motor fluid. Said surface ratio may be, for example, between 0.8 and 0.9.
  • Said divergent 7 has, for example, a rectangular section.
  • the length l of said section increases linearly and has a substantially constant width or height, from the neck 6 to the outlet orifice 5 of the nozzle 4. It is, in particular a configured width or height to the size of the particles formed. It will thus be possible to use a width or height less than 2 mm, for example of the order of 1.2 or 1.3 mm.
  • the nozzle 4 comprises, for example, a portion 23 of constant section, intended to be located upstream of the convergent 8 in the direction of flow of the driving fluid, said portion 23 of constant section being able to guide the driving fluid, charged with said particles in said first direction D1.
  • Said portion 23 of constant section is here connected to the convergent by a plane 24, inclined with respect to the direction D1 and orthogonal to the direction D2.
  • the portion of the nozzle 4 located downstream forms an acceleration portion.
  • the nozzle may comprise a bent portion upstream of its convergent, or even upstream of a portion of constant section of the nozzle, connected to said convergent.
  • said nozzle 4 comprises a divergent 7 allowing an acceleration of said driving fluid in the direction D2.
  • Said divergent 7 extends, for example, between the neck 6 and an outlet orifice of the nozzle 5.
  • the neck 6 and said outlet 5 of the nozzle 4 are, for example, orthogonal to the direction of the driving fluid, charged with said particles.
  • the ratio between the surface of the neck 6 and the surface of said outlet orifice 5 of the nozzle is, for example, greater than 0.2, especially 0.5, in particular 0.73. It will be, for example, less than 0.9. The applicant has indeed found that such a size choice allows an adequate acceleration of the particles for reduced consumption of motor fluid. Said surface ratio may be, for example, between 0.8 and 0.9.
  • Said divergent 7 has, for example, a rectangular section.
  • the length l of said section increases linearly and has a substantially constant width or height, from the neck 6 to the outlet orifice 5 of the nozzle 4. It is, in particular a configured width or height to the size of the particles formed. It will thus be possible to use a width or height less than 2 mm, for example of the order of 1.2 or 1.3 mm.
  • the neck 6 here has a rectangular section, one of the dimensions of which corresponds to the width or height of the diverging portion 7.
  • Said divergent also has a divergence angle ⁇ of about 6 ° to maintain a substantially straight stream at the nozzle outlet.
  • ⁇ a divergence angle
  • it could be an angle greater than 7 °, making it possible to obtain an enlargement of the flow at the outlet of the nozzle.
  • said divergent portion 7 may have a length L of said nozzle 4, measured between the neck 6 and the outlet orifice 5 of said nozzle 4, a length 1 S of the divergent section at said outlet 5 of the nozzle and an angle of divergence ⁇ according to the following law: 0 , 05 ⁇ I s / tan ⁇ ⁇ The ⁇ 0 , 4 ⁇ I s / tan ⁇ .
  • L may have as upper limit: (0.1 x S ) / tan ( ⁇ ).
  • the outlet orifice 5 of the nozzle is in the form of a slot. This may have a height of less than 2 mm, in particular of the order of 1.2 or 1.3 mm and / or a length of between 10 and 50 mm, in particular between 20 and 50 mm.
  • said divergent has a circular section.
  • the divergent is frustoconical.
  • Said neck may then have a circular section.
  • the angle of divergence may be of the order of 6 ° or greater than 7 °, with the same effects as those described above.
  • the convergent will then also be circular and the bent portion conforming to the information will be either at the nozzle, upstream of the neck, or upstream of said nozzle.
  • the divergents 7 of the nozzles 4 according to the invention have a length, measured between the neck and the outlet orifice of the nozzle, of less than 200 mm, in particular of 50 mm. It may be, in particular, a length of less than 10 mm for nozzles having an angle of divergence greater than 7 °.
  • the convergent 8 and the divergent 7 are connected directly to one another at the neck 6.
  • the neck 6 is a simple plane.
  • the neck 6 may have a non-zero length.
  • the nozzle does not include diverging. Its outlet is at the level of his collar. The acceleration obtained will thus be limited to that offered by the sonic collar, which may however be sufficient and even more favorable, especially for the cleaning of lightly soiled and / or particularly fragile surfaces.
  • said neck 6 is a sonic neck and will provide at the inlet of the nozzle 4 an absolute pressure of, for example, between 4 and 16 bar, especially between 4 and 6 bar.
  • Said nozzle comprises, for example, a body 30 defining said convergent 7, said neck 6 and / or said divergent 8, said body being optionally bent.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles (AREA)
  • Cleaning In General (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Claims (5)

  1. Spritzvorrichtung von Trockeneispartikeln, insbesondere zum Reinigen von Oberflächen, umfassend eine Pistole (10), die es ermöglicht, ein Arbeitsfluid auszurichten, das die Partikel in eine erste Richtung leitet, und eine Spritzdüse (4), die den Durchgang des Arbeitsfluids ermöglicht, das mit den Partikeln geladen ist, wobei die Düse (4) einen Hals (6) aufweist und einen konvergenten Düsenteil (8) aufweist, der vorgelagert vor dem Hals angeordnet ist und mit diesem Hals verbunden ist, wobei die Vorrichtung konfiguriert ist, um das Fluid, das mit den Partikeln geladen ist, in mindestens eine andere Richtung vor dem Hals (6) entlang der Strömungsrichtung des Arbeitsfluids auszurichten, wobei die Vorrichtung dadurch gekennzeichnet, dass die Düse (4) wie folgt konfiguriert ist, um das Arbeitsfluid, das mit den Partikeln geladen ist, in die andere oder in die anderen Richtungen umzulenken:
    - die Düse (4) weist einen Umlenkabschnitt (22) auf, der geeignet ist, die Bahn des Arbeitsfluids, das mit den Partikeln geladen ist, von der ersten Richtung in die andere oder die anderen Richtungen zu ändern, wobei der Umlenkabschnitt (22) vorgelagert vor dem Hals (6) angeordnet ist;
    - und der Umlenkabschnitt (22) ist mindestens teilweise an dem konvergenten Düsenteil (8) angeordnet.
  2. Vorrichtung nach Anspruch 1, wobei die Düse (4) einen Abschnitt (23) mit konstantem Querschnitt aufweist, der dazu bestimmt ist, vorgelagert vor dem konvergenten Düsenteil (8) in der Strömungsrichtung des Arbeitsfluids angeordnet zu werden, wobei der Abschnitt (23) mit konstantem Querschnitt geeignet ist, das Arbeitsfluid, das mit den Partikeln geladen ist, entlang der ersten Richtung zu führen.
  3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Düse zudem einen divergenten Düsenteil (7) aufweist, der sich zwischen dem Hals (6) und einer Austrittsöffnung (5) der Düse erstreckt.
  4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass der konvergente Düsenteil (8) und der divergente Düsenteil (7) direkt miteinander an dem Hals (6) verbunden sind.
  5. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Hals (6) eine Länge ungleich Null aufweist.
EP12756772.5A 2011-09-13 2012-08-08 Vorrichtung zum strahlen von trockeneis, insbesondere karbonisches trockeneis Active EP2755800B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1158105A FR2979846B1 (fr) 2011-09-13 2011-09-13 Dispositif de projection de glace seche, notamment de glace carbonique, et buse pour un tel dispositif
PCT/FR2012/051870 WO2013038084A1 (fr) 2011-09-13 2012-08-08 Dispositif de projection de glace sèche, notamment de glace carbonique, et buse pour un tel dispositif

Publications (2)

Publication Number Publication Date
EP2755800A1 EP2755800A1 (de) 2014-07-23
EP2755800B1 true EP2755800B1 (de) 2016-05-11

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EP12756772.5A Active EP2755800B1 (de) 2011-09-13 2012-08-08 Vorrichtung zum strahlen von trockeneis, insbesondere karbonisches trockeneis

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US (1) US20140367493A1 (de)
EP (1) EP2755800B1 (de)
ES (1) ES2585043T3 (de)
FR (1) FR2979846B1 (de)
WO (1) WO2013038084A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10792788B2 (en) 2013-10-22 2020-10-06 Tosoh Smd, Inc. Optimized textured surfaces and methods of optimizing
TWI832028B (zh) 2019-12-31 2024-02-11 美商冷卻噴射公司 粒子噴射系統及從一噴射噴嘴排出一挾帶粒子流之方法
SE546048C2 (sv) * 2023-01-07 2024-04-23 Nordisk Energi Optimering Foersaeljnings Ab Vinklat munstycke

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6042458A (en) * 1996-05-31 2000-03-28 Cold Jet, Inc. Turn base for entrained particle flow
EP0921905A1 (de) * 1996-08-22 1999-06-16 The Goodyear Tire & Rubber Company Reinigung von Reifenvulkanisierungsformen mit CO2 mittels Robotes
US20050023385A1 (en) * 2003-07-29 2005-02-03 Kui-Chiu Kwok Powder robot gun
DE102004023246B3 (de) * 2004-05-07 2005-10-27 Jens-Werner Kipp Strahlverfahren
DE102004051005A1 (de) * 2004-07-13 2006-02-02 Jens Werner Kipp Strahlvorrichtung für eine effektive Umwandlung von flüssigem Kohlendioxid in Trockenschnee- bzw. Trockeneispartikel
DE102005002365B3 (de) * 2005-01-18 2006-04-13 Air Liquide Gmbh Strahlverfahren und Vorrichtung zur Reinigung von Oberflächen
DE102005021999A1 (de) * 2005-05-09 2006-11-16 Kipp, Jens Werner Flexible Vorrichtung zu einer verbesserten Handhabung von Trockenschnee-/ Trockeneisstrahlanlagen
DE102006023709B3 (de) * 2006-05-19 2007-08-16 Buse Gastek Gmbh & Co.Kg Strahllanze

Also Published As

Publication number Publication date
ES2585043T3 (es) 2016-10-03
FR2979846A1 (fr) 2013-03-15
FR2979846B1 (fr) 2014-09-05
US20140367493A1 (en) 2014-12-18
WO2013038084A1 (fr) 2013-03-21
EP2755800A1 (de) 2014-07-23

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