EP1340592A1 - Apparatus for blasting dry ice - Google Patents

Apparatus for blasting dry ice Download PDF

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Publication number
EP1340592A1
EP1340592A1 EP03075359A EP03075359A EP1340592A1 EP 1340592 A1 EP1340592 A1 EP 1340592A1 EP 03075359 A EP03075359 A EP 03075359A EP 03075359 A EP03075359 A EP 03075359A EP 1340592 A1 EP1340592 A1 EP 1340592A1
Authority
EP
European Patent Office
Prior art keywords
compressed air
air supply
outlet
disc
rotatable
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.)
Granted
Application number
EP03075359A
Other languages
German (de)
French (fr)
Other versions
EP1340592B1 (en
Inventor
Peter Krabbendam
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.)
Hoek Loos BV
Original Assignee
Hoek Loos BV
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 Hoek Loos BV filed Critical Hoek Loos BV
Publication of EP1340592A1 publication Critical patent/EP1340592A1/en
Application granted granted Critical
Publication of EP1340592B1 publication Critical patent/EP1340592B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 an apparatus for blasting dry ice comprising a compressed air supply, an ice pellet supply, a mixer for mixing ice pellets and compressed air and an outlet to which a blasting pistol can be connected, which mixer comprises a disc, rotatably disposed between two non-rotatable plates, and wherein the compressed air supply and the ice pellet supply each debouch in a first of the non-rotatably disposed plates, and wherein the outlet connects to the oppositely disposed second non-rotatable plate, and wherein the rotatable disc has one or several holes which during rotation of the disc alternatingly align with the ice pellet supply on the one hand and the compressed air supply and the outlet on the other hand, wherein the compressed air supply has at least two outlets in the first non-rotatable plate.
  • Such an apparatus is known from the Dutch patent NL-C-1015216, and is used for blasting solid frozen carbon dioxide granules, also called pellets, with great force onto a surface to be cleaned.
  • the apparatus according to the invention is characterised, in that the outlet is provided with at least two inlet openings in the second non-rotatable plate, arranged in pairs opposite to the outlet openings of the compressed air supply in the first non-rotatable plate, so as to form through-passages when the hole or holes in the disc are aligned with the outlet openings of the compressed air supply.
  • a further advantage obtained with the apparatus according to the invention is that the blast is not only more powerful but also more even and free of pulsation in the discharged dry ice blast.
  • a small amount, from 1m 3 /min., of compressed air enables the apparatus according to the invention to produce a powerful blast at a dry-ice consumption ranging from only 5 kg/hour up to a maximum of 40 kg/hour.
  • the apparatus according to the invention When in use, the apparatus according to the invention produces a sound pressure of approximately 79 dB(A) at a standard operating pressure of 5 bars.
  • the working performance of the apparatus according to the invention is further advanced by the disc being provided with a series of holes positioned at regular distances from each other and equidistanced from the centre of the disc.
  • Fig. 1 showing the active components of the apparatus according to the invention.
  • These include a dual compressed air supply 1 generally connected to a common compressed air source (not shown), an ice pellet supply 2 embodied as a hopper, a mixer 3, 4, 5 for mixing the ice pellets and compressed air, and an outlet 6 to which a blasting pistol can be connected.
  • the mixer 3, 4, 5 comprises a rotatable disc 5 disposed between non-rotatable plates 3 and 4.
  • both the compressed air supply 1 and the ice pellet supply 2 each debouch in one of the non-rotatably disposed plates 3, 4, in the case illustrated this is the upper plate 3.
  • These outlet openings are clearly shown in Fig. 2 carrying the reference numbers 1', 1'' and 2', respectively.
  • the other non-rotatably disposed plate i.e. the lower plate 4 is provided with two inlet openings 6' and 6" for the outlet 6.
  • the rotatable disc 5 is provided with one or several holes which during rotation of the disc 5 alternatingly align on the one hand with the ice pellet supply 2 and on the other hand with the compressed air supply 1 and the outlet 6.
  • the inlet openings 6' and 6" of the outlet 6 are disposed in pairs in the extended direction of the outlet openings 1' and 1'' of the compressed air supply 1, such that when the hole or the holes align with the outlet openings 1', 1'' of the compressed air supply 1 they form through-passages.
  • the disc 5 is preferably provided with a series of holes at regular distances from one another and equidistanced from the centre of the disc, so that when the disc is being rotated, such a through-passage can be realised at high frequency.
  • Fig. 1 and Fig. 2 show that the compressed air supply 1 comprises two outlet openings 1' and 1'' positioned diametrically in relation to one another. In this way the compressed air load on the rotatable disc is symmetrical, allowing it to rotate with the least possible friction between the non-rotatably disposed plates 3 and 4.
  • Fig. 1 further shows that the non-rotatably disposed plates 3 and 4 are fixed in relation to one another by means of fixing pins 7. These pins further serve to fasten the plates 3 and 4 to each other.
  • Fig. 1 further schematically shows that the rotating disc 5 is coupled with an air-operated engine 9.
  • Figs. 2 and 3 show slots 10 provided in the upper plate 3 and the lower plate 4, for venting excess driving air.
  • the apparatus according to the invention produces an excellent, constant blast that is virtually free of pulsation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Transport Of Granular Materials (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)

Abstract

The invention relates to an apparatus for blasting dry ice comprising a compressed air supply (1), an ice pellet supply (2), a mixer (3,4,5) for mixing ice pellets and compressed air and an outlet (6) to which a blasting pistol can be connected, which mixer (3,4,5) comprises a disc (5), rotatably disposed between two non-rotatable plates (3,4), and wherein the compressed air supply (1) and the ice pellet supply (2) each debouch in a first of the non-rotatably disposed plates (3), and wherein the outlet connects to the oppositely disposed second non-rotatable plate (4), and wherein the rotatable disc (5) has one or several holes which during rotation of the disc (5) alternatingly connect to the ice pellet supply (2,2') on the one hand and the compressed air supply (1) and the outlet (6) on the other hand, wherein the compressed air supply (1) has at least two outlets (1',1'') in the first non-rotatable plate (3). The outlet (6) is provided with at least two inlet openings (6',6'') in the second non-rotatable plate (4), arranged in pairs opposite to the outlet openings (1',1'') of the compressed air supply (1) in the first non-rotatable plate (3), so as to form through-passages when the hole or holes in the disc (5) are aligned with the outlet openings (1',1'') of the compressed air supply (1).

Description

The invention relates to an apparatus for blasting dry ice comprising a compressed air supply, an ice pellet supply, a mixer for mixing ice pellets and compressed air and an outlet to which a blasting pistol can be connected, which mixer comprises a disc, rotatably disposed between two non-rotatable plates, and wherein the compressed air supply and the ice pellet supply each debouch in a first of the non-rotatably disposed plates, and wherein the outlet connects to the oppositely disposed second non-rotatable plate, and wherein the rotatable disc has one or several holes which during rotation of the disc alternatingly align with the ice pellet supply on the one hand and the compressed air supply and the outlet on the other hand, wherein the compressed air supply has at least two outlets in the first non-rotatable plate.
Such an apparatus is known from the Dutch patent NL-C-1015216, and is used for blasting solid frozen carbon dioxide granules, also called pellets, with great force onto a surface to be cleaned.
It is the object of the invention to improve the known apparatus such that a more powerful and more even blast is obtained. To this end the apparatus according to the invention is characterised, in that the outlet is provided with at least two inlet openings in the second non-rotatable plate, arranged in pairs opposite to the outlet openings of the compressed air supply in the first non-rotatable plate, so as to form through-passages when the hole or holes in the disc are aligned with the outlet openings of the compressed air supply.
Surprisingly, it has been shown that by doubling the number of inlet openings of the outlet, a dry ice blast twice as powerful is produced, while the amount of ice pellets supplied is the same as with an apparatus of the prior art. A further increase of the number of inlet openings of the outlet will even better this result. Referring to the foregoing, the person skilled in the art will be able to choose the number of inlet openings, so that a further explanation with regard to its implementation is not necessary.
A further advantage obtained with the apparatus according to the invention is that the blast is not only more powerful but also more even and free of pulsation in the discharged dry ice blast.
The above-mentioned advantages are achieved while maintaining the favourable properties of the apparatus known from the cited prior art. In brief these advantages are as follows.
A small amount, from 1m3/min., of compressed air enables the apparatus according to the invention to produce a powerful blast at a dry-ice consumption ranging from only 5 kg/hour up to a maximum of 40 kg/hour.
When in use, the apparatus according to the invention produces a sound pressure of approximately 79 dB(A) at a standard operating pressure of 5 bars.
The working performance of the apparatus according to the invention is further advanced by the disc being provided with a series of holes positioned at regular distances from each other and equidistanced from the centre of the disc.
The invention will now be further elucidated with reference to the drawing of a non-limiting exemplary embodiment of the apparatus according to the invention.
The drawing shows in:
  • Fig. 1 a schematic cross section of the active components of the apparatus according to the invention.
  • Figs. 2 and 3, respectively, a cross-section of the non-rotatable upper plate and lower plate of the apparatus according to the invention.
Identical reference numbers in the figures refer to similar components.
Referring first to Fig. 1 showing the active components of the apparatus according to the invention. These include a dual compressed air supply 1 generally connected to a common compressed air source (not shown), an ice pellet supply 2 embodied as a hopper, a mixer 3, 4, 5 for mixing the ice pellets and compressed air, and an outlet 6 to which a blasting pistol can be connected. The mixer 3, 4, 5 comprises a rotatable disc 5 disposed between non-rotatable plates 3 and 4. As can be seen in the figure, both the compressed air supply 1 and the ice pellet supply 2 each debouch in one of the non-rotatably disposed plates 3, 4, in the case illustrated this is the upper plate 3. These outlet openings are clearly shown in Fig. 2 carrying the reference numbers 1', 1'' and 2', respectively.
Referring partly also to Fig. 3, the other non-rotatably disposed plate, i.e. the lower plate 4, is provided with two inlet openings 6' and 6" for the outlet 6. In a manner quite clear to the person skilled in the art and therefore not further illustrated in the drawing, the rotatable disc 5 is provided with one or several holes which during rotation of the disc 5 alternatingly align on the one hand with the ice pellet supply 2 and on the other hand with the compressed air supply 1 and the outlet 6. As clearly shown in connection with Fig. 2 and Fig. 3, the inlet openings 6' and 6" of the outlet 6 are disposed in pairs in the extended direction of the outlet openings 1' and 1'' of the compressed air supply 1, such that when the hole or the holes align with the outlet openings 1', 1'' of the compressed air supply 1 they form through-passages. In a manner that is obvious to the person skilled in the art, the disc 5 is preferably provided with a series of holes at regular distances from one another and equidistanced from the centre of the disc, so that when the disc is being rotated, such a through-passage can be realised at high frequency.
Both Fig. 1 and Fig. 2 show that the compressed air supply 1 comprises two outlet openings 1' and 1'' positioned diametrically in relation to one another. In this way the compressed air load on the rotatable disc is symmetrical, allowing it to rotate with the least possible friction between the non-rotatably disposed plates 3 and 4. Fig. 1 further shows that the non-rotatably disposed plates 3 and 4 are fixed in relation to one another by means of fixing pins 7. These pins further serve to fasten the plates 3 and 4 to each other. The pins 7 are further provided with spring rings 8 exerting a slight upward pressure that pushes the non-rotatably disposed plates 3 and 4 toward each other, so as to avoid leakage loss between these non-rotatable plates 3 and 4 and the rotatable disc 5. Fig. 1 further schematically shows that the rotating disc 5 is coupled with an air-operated engine 9. In this connection the Figs. 2 and 3 show slots 10 provided in the upper plate 3 and the lower plate 4, for venting excess driving air. The apparatus according to the invention produces an excellent, constant blast that is virtually free of pulsation.

Claims (1)

  1. An apparatus for blasting dry ice comprising a compressed air supply (1), an ice pellet supply (2), a mixer (3, 4, 5) for mixing ice pellets and compressed air and an outlet (6) to which a blasting pistol can be connected, which mixer (3, 4, 5) comprises a disc (5), rotatably disposed between two non-rotatable plates (3, 4), and wherein the compressed air supply (1) and the ice pellet supply (2) each debouch in a first of the non-rotatably disposed plates (3), and wherein the outlet connects to the oppositely disposed second non-rotatable plate (4), and wherein the rotatable disc (5) has one or several holes which during rotation of the disc (5) alternatingly align with the ice pellet supply (2, 2') on the one hand and the compressed air supply (1) and the outlet (6) on the other hand, wherein the compressed air supply (1) has at least two outlets (1', 1'') in the first non-rotatable plate (3), characterised in that the outlet (6) is provided with at least two inlet openings (6', 6'') in the second non-rotatable plate (4), arranged in pairs opposite to the outlet openings (1', 1'') of the compressed air supply (1) in the first non-rotatable plate (3), so as to form through-passages when the hole or holes in the disc (5) are aligned with the outlet openings (1', 1'') of the compressed air supply (1).
EP03075359A 2002-02-27 2003-02-07 Apparatus for blasting dry ice Expired - Lifetime EP1340592B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1020072A NL1020072C2 (en) 2002-02-27 2002-02-27 Device for dry ice blasting.
NL1020072 2002-02-27

Publications (2)

Publication Number Publication Date
EP1340592A1 true EP1340592A1 (en) 2003-09-03
EP1340592B1 EP1340592B1 (en) 2006-08-09

Family

ID=27730987

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03075359A Expired - Lifetime EP1340592B1 (en) 2002-02-27 2003-02-07 Apparatus for blasting dry ice

Country Status (6)

Country Link
EP (1) EP1340592B1 (en)
AT (1) ATE335573T1 (en)
DE (1) DE60307340T2 (en)
DK (1) DK1340592T3 (en)
ES (1) ES2272883T3 (en)
NL (1) NL1020072C2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1027172C2 (en) 2004-10-05 2006-04-06 Hoek Loos Nv Spray pistol is for dry ice or grit, has feed connection (2) for dry ice or grit accommodated in a primary air flow, and a feed-out channel (3) connected to the feed connection with a spray mouthpiece (4)
EP1878537A1 (en) * 2006-07-14 2008-01-16 Artimpex NV Device for particle blasting

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK2994269T3 (en) * 2013-05-06 2019-12-09 Ics Ice Cleaning Systems S R O Device for mixing solid particles of dry ice with a flow of a gaseous medium

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4617064A (en) * 1984-07-31 1986-10-14 Cryoblast, Inc. Cleaning method and apparatus
NL9301237A (en) * 1993-07-14 1995-02-01 Harko Bv Method for treating surfaces with cryogenic particles
WO1999022909A1 (en) * 1997-11-03 1999-05-14 Huibert Konings Metering device for cryogenic pellets
NL1015216C2 (en) * 2000-05-17 2001-11-20 Hoek Loos Bv Compressed air and dry ice mixer to produce powerful jet for cleaning
DE10036557A1 (en) * 2000-07-27 2002-02-07 Juergen Von Der Ohe Surface cleaning process for molds and tools involves dividing compressed air flow into at least two individual air flows in set ratio

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4617064A (en) * 1984-07-31 1986-10-14 Cryoblast, Inc. Cleaning method and apparatus
NL9301237A (en) * 1993-07-14 1995-02-01 Harko Bv Method for treating surfaces with cryogenic particles
WO1999022909A1 (en) * 1997-11-03 1999-05-14 Huibert Konings Metering device for cryogenic pellets
NL1015216C2 (en) * 2000-05-17 2001-11-20 Hoek Loos Bv Compressed air and dry ice mixer to produce powerful jet for cleaning
DE10036557A1 (en) * 2000-07-27 2002-02-07 Juergen Von Der Ohe Surface cleaning process for molds and tools involves dividing compressed air flow into at least two individual air flows in set ratio

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1027172C2 (en) 2004-10-05 2006-04-06 Hoek Loos Nv Spray pistol is for dry ice or grit, has feed connection (2) for dry ice or grit accommodated in a primary air flow, and a feed-out channel (3) connected to the feed connection with a spray mouthpiece (4)
EP1878537A1 (en) * 2006-07-14 2008-01-16 Artimpex NV Device for particle blasting
BE1017228A3 (en) * 2006-07-14 2008-05-06 Artimpex Nv DEVICE FOR GRANULATE RAYS.
US7775857B2 (en) 2006-07-14 2010-08-17 Artimpex N.V. Device for particle blasting

Also Published As

Publication number Publication date
DE60307340D1 (en) 2006-09-21
ES2272883T3 (en) 2007-05-01
NL1020072C2 (en) 2003-08-29
DK1340592T3 (en) 2006-12-04
ATE335573T1 (en) 2006-09-15
DE60307340T2 (en) 2007-08-16
EP1340592B1 (en) 2006-08-09

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