NL9301237A - Method for treating surfaces with cryogenic particles - Google Patents
Method for treating surfaces with cryogenic particles Download PDFInfo
- Publication number
- NL9301237A NL9301237A NL9301237A NL9301237A NL9301237A NL 9301237 A NL9301237 A NL 9301237A NL 9301237 A NL9301237 A NL 9301237A NL 9301237 A NL9301237 A NL 9301237A NL 9301237 A NL9301237 A NL 9301237A
- Authority
- NL
- Netherlands
- Prior art keywords
- cryogenic particles
- cryogenic
- compressed air
- dosing
- working surfaces
- Prior art date
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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Description
Werkwijze voor het bewerken van oppervlakken vet crvogene deeltjes.Method for working surfaces of fat crvogenic particles.
De uitvinding betreft een inrichting waarmee oppervlakken gestraald worden met deeltjes bestaande uit samengeperste vaste kooldyoxide. De deeltjes hebben de vorm van een prisma met een driehoekige doorsnede.The invention relates to a device for blasting surfaces with particles consisting of compressed solid carbon dioxides. The particles have the shape of a prism with a triangular cross section.
Er zijn inrichtingen bekend waar staafjes vast kooldyoxide vergruisd worden en vervolgens met behulp van perslucht tegen het te stralen oppervlak geblazen worden.Devices are known where rods of solid carbon dioxides are crushed and subsequently blown against the surface to be blasted with the aid of compressed air.
Het is gebleken dat deze werkwijze een zeer laag rendement heeft omdat de korrelgroote van het kooldyoxidegruis sterk wisselt en de kleine delen gesublimeerd zijn voordat deze het te stralen oppervlak kunnen bereiken.It has been found that this method has a very low efficiency because the grain size of the carbon dioxide grit varies widely and the small parts are sublimated before they can reach the surface to be irradiated.
In de onderhavige inrichting worden de deeltjes niet vergruisd, waardoor het rendement verbeterd wordt.In the present device, the particles are not crushed, which improves the efficiency.
Bij de beschrijving van de werkwijze wordt uitgegaan van een geprefabriceerd straalmiddel van vast kooldyoxide, de zogenaamde pellets, die prisma-vormig zijn met een driehoekige doorsnede. Hierdoor kan de inrichting compact en mobiel uitgevoerd worden.The description of the method is based on a prefabricated blasting medium of solid carbon dioxides, the so-called pellets, which are prism-shaped with a triangular cross section. The device can hereby be made compact and mobile.
De werkwijze wordt beschreven aan de hand van de tekeningen: Figuur 1 toont een schema van de inrichting, figuur 2 toont de doseerschijf met de vul- en uitstroomopening.The method is described with reference to the drawings: Figure 1 shows a diagram of the device, Figure 2 shows the dosing disc with the filling and outflow opening.
De pellets worden geladen in een geïsoleerd magazijn (1). In dit magazijn (1) is een klopinrichting (2) aangebracht om een gelijkmatige toevoer van pellets te bewerkstelligen. Via uitstroomtrechter (3) vallen de pellets in de openingen (4) van de doseerschijf (5) welke draaibaar is om as (6), De doseerschijf (5) wordt met een regelbare snelheid rondgedraaid. De vulopening (7) heeft een niervormige omtreksvorm, die ontstaat door opening (4) over een hoek van ongeveer 30 graden te roteren.The pellets are loaded in an insulated warehouse (1). A beater (2) is arranged in this magazine (1) to ensure an even supply of pellets. The pellets fall through the outlet funnel (3) into the openings (4) of the dosing disc (5) which is rotatable about axis (6). The dosing disc (5) is rotated at an adjustable speed. The filling opening (7) has a kidney-shaped circumferential shape, which is created by rotating opening (4) through an angle of about 30 degrees.
Tegenover de vulopening (7) is de niervormige uitstroomopening (8> geplaatst. Deze opening heeft een omtreksvorm <9> die ontstaat door opening (4) over een hoek van ongeveer 60 graden te roteren. Onder de uitstroomopening (8) is een uitvoertrechter (10) geplaatst.The kidney-shaped outflow opening (8> is placed opposite the filling opening (7). This opening has a circumferential shape <9> that is created by rotating opening (4) through an angle of approximately 60 degrees. Under the outflow opening (8) is an outlet funnel ( 10) placed.
Boven de uitstroomopening (δ) is en overeenkomstige opening (11). Deze opening staat via een trechter (12) in verbinding met een luchtleiding (13). De luchtstroom door luchtleiding (13) en opening (11) drijft de pellets uit de openingen (4). In deze luchtleiding is opgenomen een afsluiter (14) en dender (15) die luchtdrukgolven opvangt. De luchtleiding (13) is aangesloten op de persluchttoevoer (16) ter hoogte van (17). In de persluchttoevoer (16) is een afsluiter (18) opgenomen. De perslucht wordt via afsluiter (19) gevoerd naar het mengstuk (20). De gedoseerde stroom pellets uit de uitvoertrechter (10) worden via een schuin geplaatste aanvoerbuis (21), eveneens naar het mengstuk (20) gevoerd. Deze aanvoerbuis (21) staat onder een hoek (22) van circa 45 graden ten opzichte van het mengstuk (20). De pellets worden met de luchtstroom meegevoerd.Above the outflow opening (δ) is a corresponding opening (11). This opening is connected to an air line (13) via a funnel (12). The airflow through air line (13) and opening (11) drives the pellets out of the openings (4). Included in this air line is a valve (14) and dender (15) that receives air pressure waves. The air line (13) is connected to the compressed air supply (16) at (17). A valve (18) is included in the compressed air supply (16). The compressed air is supplied to the mixing piece (20) via valve (19). The metered flow of pellets from the discharge funnel (10) is fed via an inclined supply tube (21), also to the mixing piece (20). This supply tube (21) is at an angle (22) of approximately 45 degrees to the mixing piece (20). The pellets are carried along with the air flow.
Het mengstuk (20) en de hieraan verbonden straalslang (23) zijn aan de binnenzijde bekleed met een laag (24) van 3 tot 8 millimeter natuurrubber. Deze rubber heeft een hardheid van 40-80 Shore D,The mixing piece (20) and the associated blast hose (23) are covered on the inside with a layer (24) of 3 to 8 millimeters of natural rubber. This rubber has a hardness of 40-80 Shore D,
De gehele inrichting is voorzien van een (niet getekende) thermische isolatie teneinde het verlies door sublimatie zoveel mogelijk te beperken,The entire device is equipped with a thermal insulation (not shown) in order to minimize loss through sublimation,
De perslucht die voor de werkwijze gebruikt wordt is zover gedroogd dat het dauwpunt onder -30 graden Celcius ligt.The compressed air used for the process has dried to such an extent that the dew point is below -30 degrees Celsius.
Doordat de eisen voor de bewerking van bepaalde oppervlakken kunnen variëren, is de druk van de perslucht regelbaar tot 20 bar en wordt de snelheid van de doseerschijf (5) aangepast. Tevens is de hoeveelheid lucht welke de pellets uit de doseerschijf (5) drijft met afsluiters (14, 17) te regelen. De demper (15) is opgenomen in luchtleiding (13) om drukstoten op te vangen en te dempen. Hiermee wordt oscillatie in het leidingsysteem voorkomen.Because the requirements for the processing of certain surfaces can vary, the pressure of the compressed air is adjustable up to 20 bar and the speed of the dosing disc (5) is adjusted. The amount of air that drives the pellets out of the dosing disc (5) can also be controlled with valves (14, 17). The damper (15) is included in air line (13) to absorb and cushion pressure surges. This prevents oscillation in the piping system.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL9301237A NL9301237A (en) | 1993-07-14 | 1993-07-14 | Method for treating surfaces with cryogenic particles |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL9301237A NL9301237A (en) | 1993-07-14 | 1993-07-14 | Method for treating surfaces with cryogenic particles |
NL9301237 | 1993-07-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
NL9301237A true NL9301237A (en) | 1995-02-01 |
Family
ID=19862656
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL9301237A NL9301237A (en) | 1993-07-14 | 1993-07-14 | Method for treating surfaces with cryogenic particles |
Country Status (1)
Country | Link |
---|---|
NL (1) | NL9301237A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1007421C2 (en) * | 1997-11-03 | 1999-05-04 | Huibert Konings | Metering device for cryogenic particles. |
NL1015216C2 (en) * | 2000-05-17 | 2001-11-20 | Hoek Loos Bv | Compressed air and dry ice mixer to produce powerful jet for cleaning |
NL1017210C2 (en) * | 2001-01-29 | 2002-07-30 | Huibert Konings | Cryogenic particle dosing device. |
EP1340592A1 (en) * | 2002-02-27 | 2003-09-03 | Hoek Loos B.V. | Apparatus for blasting dry ice |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2543019A1 (en) * | 1974-09-27 | 1976-04-08 | Lockheed Aircraft Corp | SANDBASING METHOD AND EQUIPMENT FOR IMPLEMENTING IT |
US4389820A (en) * | 1980-12-29 | 1983-06-28 | Lockheed Corporation | Blasting machine utilizing sublimable particles |
US4463736A (en) * | 1982-06-07 | 1984-08-07 | Hayward Jr Wallace | Chambered rotary metering device |
WO1986000833A1 (en) * | 1984-07-31 | 1986-02-13 | Cryoblast Inc. | Cleaning method and apparatus |
NL8801577A (en) * | 1988-06-21 | 1990-01-16 | Harko B V Staalstraalbedrijf | Cryogenic jet spray arrangement - using carbon di:oxide grit for cleaning building facades, grit is fed to bunker and cooled under pressure via gas tight sluice |
WO1990001396A1 (en) * | 1988-08-01 | 1990-02-22 | Cold Jet, Inc. | Particle blast cleaning apparatus and method |
WO1990014927A1 (en) * | 1989-05-30 | 1990-12-13 | Ixtal Blast Technology Corp. | Particle blast cleaning and treating of surfaces |
WO1992009525A1 (en) * | 1990-11-28 | 1992-06-11 | Harko B.V. | Mould to be used for compacting pellets |
EP0509132A1 (en) * | 1991-04-19 | 1992-10-21 | Szücs, Eva Abony | Method and device for the cleaning of surfaces, in particular delicate surfaces |
EP0521794A1 (en) * | 1991-07-05 | 1993-01-07 | Commissariat A L'energie Atomique | Apparatus for storing and conveying ice-balls, without sticking to each other, from their place of production to their place of use, where they are propelled against a target |
-
1993
- 1993-07-14 NL NL9301237A patent/NL9301237A/en not_active Application Discontinuation
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2543019A1 (en) * | 1974-09-27 | 1976-04-08 | Lockheed Aircraft Corp | SANDBASING METHOD AND EQUIPMENT FOR IMPLEMENTING IT |
US4389820A (en) * | 1980-12-29 | 1983-06-28 | Lockheed Corporation | Blasting machine utilizing sublimable particles |
US4463736A (en) * | 1982-06-07 | 1984-08-07 | Hayward Jr Wallace | Chambered rotary metering device |
WO1986000833A1 (en) * | 1984-07-31 | 1986-02-13 | Cryoblast Inc. | Cleaning method and apparatus |
NL8801577A (en) * | 1988-06-21 | 1990-01-16 | Harko B V Staalstraalbedrijf | Cryogenic jet spray arrangement - using carbon di:oxide grit for cleaning building facades, grit is fed to bunker and cooled under pressure via gas tight sluice |
WO1990001396A1 (en) * | 1988-08-01 | 1990-02-22 | Cold Jet, Inc. | Particle blast cleaning apparatus and method |
WO1990014927A1 (en) * | 1989-05-30 | 1990-12-13 | Ixtal Blast Technology Corp. | Particle blast cleaning and treating of surfaces |
WO1992009525A1 (en) * | 1990-11-28 | 1992-06-11 | Harko B.V. | Mould to be used for compacting pellets |
EP0509132A1 (en) * | 1991-04-19 | 1992-10-21 | Szücs, Eva Abony | Method and device for the cleaning of surfaces, in particular delicate surfaces |
EP0521794A1 (en) * | 1991-07-05 | 1993-01-07 | Commissariat A L'energie Atomique | Apparatus for storing and conveying ice-balls, without sticking to each other, from their place of production to their place of use, where they are propelled against a target |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1007421C2 (en) * | 1997-11-03 | 1999-05-04 | Huibert Konings | Metering device for 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 |
NL1017210C2 (en) * | 2001-01-29 | 2002-07-30 | Huibert Konings | Cryogenic particle dosing device. |
WO2002060647A1 (en) * | 2001-01-29 | 2002-08-08 | Huibert Konings | Feeder for cryogenic particles |
EP1340592A1 (en) * | 2002-02-27 | 2003-09-03 | Hoek Loos B.V. | Apparatus for blasting dry ice |
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