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EP0122928A1 - Method for sand-blasting by means of wet sand. - Google Patents

Method for sand-blasting by means of wet sand.

Info

Publication number
EP0122928A1
EP0122928A1 EP83903384A EP83903384A EP0122928A1 EP 0122928 A1 EP0122928 A1 EP 0122928A1 EP 83903384 A EP83903384 A EP 83903384A EP 83903384 A EP83903384 A EP 83903384A EP 0122928 A1 EP0122928 A1 EP 0122928A1
Authority
EP
European Patent Office
Prior art keywords
sand
water
blasting
nozzle
pressurized water
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
EP83903384A
Other languages
German (de)
French (fr)
Other versions
EP0122928B1 (en
Inventor
Josef Keizers
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.)
Individual
Original Assignee
Individual
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6176526&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0122928(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Priority to AT83903384T priority Critical patent/ATE39640T1/en
Publication of EP0122928A1 publication Critical patent/EP0122928A1/en
Application granted granted Critical
Publication of EP0122928B1 publication Critical patent/EP0122928B1/en
Expired 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
    • B24C7/0007—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier
    • B24C7/0038—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier the blasting medium being a gaseous stream
    • 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
    • B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
    • 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
    • B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0007—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier
    • 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

Definitions

  • the invention relates to a method for sandblasting with damp sand and a damp sandblasting device for
  • a method of the type mentioned is e.g. B. known from German Patent 535,287 or US Pat. No. 3,514,905.
  • a disadvantage of these methods and the corresponding devices, which for those skilled in the art naturally also have input means for the sand to be blasted, is that they are too small
  • the supply hose to the actual jet nozzle can only have a limited length and that the nozzles for introducing the pressurized water into the pressure vessel can also be easily added during its filling.
  • the wet sandblasting device according to the invention is simply constructed and should be reliable and easy to regulate.
  • Compressed air is advantageously used as the blowing agent, alternatively, however, pressurized water can also be used as the Z propellant for blasting, in particular under water.
  • pressurized water can also be used as the Z propellant for blasting, in particular under water.
  • ⁇ n another embodiment of the invention is advantageously medium flow for setting a uniform blasting vessel by a water jet in the Druck ⁇ a water-sand fluidized bed produced, and the promotion of the pressurized water-sand mixture vorteil ⁇ can by way of this governed by the outlet from the pressure vessel Additional pressurized water can be supplied.
  • the damp sand blasting device is advantageously characterized in that there is a blasting nozzle for the damp sand connected to the pressure container via a hose, the blasting nozzle with an additional propellant line
  • OMP is connected and has a drive nozzle in which the hose for the water-sand mixture opens.
  • the damp sandblasting device is advantageously designed such that it has a nozzle for introducing pressurized water, a means for low continuous introduction of pressurized water during filling and for the strong introduction of pressurized water during sandblasting, above a bottom outlet of the pressure vessel as well as means for the controlled introduction of additional pressurized water into the beginning of the hose for the water-sand mixture.
  • the blasting nozzle advantageously has the inlet for the sand-water mixture behind the blowing nozzle, through which the additional blowing agent flows, and there is an opening for sandblasting under water
  • Blowing agent available from which it can flow in the opposite direction to the blasting agent outlet.
  • FIG. 1 schematically, in partial section, the pressure vessel for the sand-pressure water mixture
  • Figure 2 shows schematically in section the jet nozzle with the additional propellant supply
  • Figure 3 shows the driving nozzle according to Figure 2 for underwater blasting.
  • the device according to the invention consists of a pressure vessel 1, on which sieves for O 84/01738
  • the pressure vessel 1 has lines for supplying pressurized water, with a nozzle 8 with directed water outlet in the vicinity of the outlet opening 7 for the water-sand mixture ensuring that a fluidized bed is set up, so that a smooth and smooth outflow of the Water-sand mixture from the lower area of the container 1 is set.
  • the hose 2 is provided for the outflow of the water-sand mixture and there are means 10 for introducing additional water into the beginning of the hose 2, which, depending on the hose length and back pressure, promote the water-sand mixture strengthen or support.
  • the water-sand mixture is conveyed to a blasting nozzle 3, in which compressed air is supplied via an additional propellant line or, when blasting under water, also pressurized water as a propellant for the propelling nozzle 5.
  • This additional propellant ensures that, despite relatively low pressurized water consumption, a superior blasting effect can be achieved with the lowest abrasive consumption.
  • a Laval or expansion nozzle can be placed behind the actual driving nozzle 5, as shown in FIG. 2, which opens into a funnel 11.
  • the wet sand blasting device now works automatically after filling with sand and pressurized water as a function of the actuation of the handle 12, additional water being input into the beginning of the hose 2 via a remote-controlled valve 13.
  • the amount of this make-up water can be controlled by means 10, which consists of a series of valves and overflow lines.
  • the damp-sand blasting pressure vessel according to the invention is protected by a reducing valve 14 and a pressure safety valve 15, so that only the desired pressure is generated within the vessel and this automatically diminishes when excess pressure occurs.
  • a check valve 16 and a filter 17 ensure that no backwashing with contaminants into the pressurized water line takes place from the pressurized container, which could clog the reducing valve 14.
  • the wet sand blasting device according to the invention can be used universally, is simple in construction and works safely and it can therefore be said that the problems at hand are ideally solved. ⁇ "

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Cleaning In General (AREA)
  • Nozzles (AREA)
  • Fish Paste Products (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Disintegrating Or Milling (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Paper (AREA)

Abstract

The method for sand blasting with wet sand comprises the mixing of sand with water in a pressure container (1) and the projection of the mixture by means of an additional agent from a nozzle (3). As a projection agent, compressed air or water underpressure is used for underwater working conditions. An apparatus for implementing such method comprises a pressure tank (1), a pressure water conduit, a nozzle connected by a flexible pipe to the pressure tank, the nozzle (3) being also connected to an additional projection agent source and having an inlet for the sand-water mixture.

Description

Verfahren zum Sandstrahlen mit Feuchtsand sowie Sand¬ strahlgerät zur Durchführung dieses VerfahrensProcess for sandblasting with moist sand and sandblasting device for carrying out this process
Die Erfindung betrifft ein Verfahren zum Sandstrahlen mit Feuchtsand sowie ein Feuchtsandstrahlgerät zurThe invention relates to a method for sandblasting with damp sand and a damp sandblasting device for
Durchführung dieses Verfahrens , welches einen mit Strahl¬ sand gefüllten Druc behälter und Zuleitungen für Druck¬ wasser aufweist.Implementation of this method, which has a pressure vessel filled with blasting sand and feed lines for pressurized water.
Ein Verfahren der genannten Art ist z . B . aus der deutschen Patentschrift 535 287 oder der US-PS 3 5 14 905 bekannt. Nachteilig bei diesen Verfahren und den ent¬ sprechenden Vorrichtungen , die für den Fachmann selbst¬ verständlich auch Eingabemittel für den zu verstrahlen- den Sand aufweisen , ist es , daß diese eine zu geringeA method of the type mentioned is e.g. B. known from German Patent 535,287 or US Pat. No. 3,514,905. A disadvantage of these methods and the corresponding devices, which for those skilled in the art naturally also have input means for the sand to be blasted, is that they are too small
Strahlleistung aufweisen , der Zuleitungsschlauch zu der eigentlichen Strahldüse nur eine begrenzte Länge auf¬ weisen kann und daß weiterhin die Düsen zur Einbrin¬ gung des Druckwassers in den Druckbehälter während des¬ sen Befüllung leicht zugesetzt werden können .Have jet power, the supply hose to the actual jet nozzle can only have a limited length and that the nozzles for introducing the pressurized water into the pressure vessel can also be easily added during its filling.
Es ist jetzt Aufgabe der Erfindung, ein Verfahren und ein Feuchtsandstrahlgerät zu finden, denen die vorge¬ nannten Nachteile nicht mehr anhaften, die eine ver- besserte Strahlleistung bei verringertem St hlmittel- bzw. Sandverbrauch aufweisen, deren Einsatz auch unter Wasser, bis zu erheblichen Tiefen möglich ist und wobeiIt is now the object of the invention to find a method and a damp sandblasting device which no longer have the aforementioned disadvantages, which have improved blasting performance with reduced consumption of detergent or sand, and their use even under water up to considerable Depths is possible and being
OMPI das Feuchtsandstrahlgerät gemäß der Erfindung eifach aufgebaut sowie be riebssicher und leicht zu regeln sein soll.OMPI the wet sandblasting device according to the invention is simply constructed and should be reliable and easy to regulate.
Insbesondere soll es möglich sein , mit dem erfindungs¬ gemäßen Verfahren und dem entsprechenden Feuchtsand¬ strahlgerät auch Gegenstände zu strahlen , die von dem Aufstellungsort des Gerätes eine erhebliche Entfernung aufweisen , ohne daß die Strahlleistung abfällt.In particular, it should be possible to use the method according to the invention and the corresponding wet sand blasting device to also blast objects which are at a considerable distance from the installation site of the device without the blasting power dropping.
Diese Aufgabe wird erfindungsgemäß verfahrensmäßig dadurch gelöst , daß Wasser und Sand in einem Druck¬ behälter vermischt und darauf zu einer Strahldüse unter Druck geleitet wird und daß in der Strahldüse zu- sätzliches Treibmittel zugeführt wird.This object is achieved according to the invention in that water and sand are mixed in a pressure vessel and then passed to a blasting nozzle under pressure and in that additional blowing agent is fed into the blasting nozzle.
Als Treibmittel dient vorteilhaft Preßluft , alternativ kann für das Strahlen insbescndere unter Wasser aber auch Druck¬ wasser als Z satztreibmittel verwendet werden . Dabei wird vorteilhaft zum Rückstoßausgleich aus der Strahl- düse auch ein Austritt eines Teiles des Strahlmittels in einer Richtung eingestellt, die entgegengesetzt zur Austrittsrichtung des Strahlmittels ist.Compressed air is advantageously used as the blowing agent, alternatively, however, pressurized water can also be used as the Z propellant for blasting, in particular under water. In order to compensate for recoil from the blasting nozzle, it is also advantageous to set a part of the blasting agent to exit in a direction that is opposite to the exit direction of the blasting agent.
ιn einer weiteren Ausgestaltung der Erfindung wird vorteilhaft zur Einstellung eines gleichmäßigen Strahl- mittelstromes durch einen Wasserstrahl in dem Druck¬ behälter ein Wasser-Sand-Wirbelbett erzeugt und zur Förderung des Druckwasser-Sandgemisches kann vorteil¬ haft diesem nach dem Austritt aus dem Druckbehälter geregelt Zusatzdruckwasser zugeführt werden.ι n another embodiment of the invention is advantageously medium flow for setting a uniform blasting vessel by a water jet in the Druck¬ a water-sand fluidized bed produced, and the promotion of the pressurized water-sand mixture vorteil¬ can by way of this governed by the outlet from the pressure vessel Additional pressurized water can be supplied.
Vorrichtungsmäßig kennzeichnet sich das erfindungsge¬ mäße Feuchtsandstrahlgerät vorteilhaft dadurch, daß eine mit dem Druckbehälter über einen Schlauch verbun¬ dene Strahldüse für den Feuchtsand vorhanden ist, die Strahldüse mit einer zusätzlichen TreibmittelleitungIn terms of the device, the damp sand blasting device according to the invention is advantageously characterized in that there is a blasting nozzle for the damp sand connected to the pressure container via a hose, the blasting nozzle with an additional propellant line
OMP verbunden ist und eine Treibdüse aufweist , in der der Schlauch für das Wasser- Sand-Gemisch mündet .OMP is connected and has a drive nozzle in which the hose for the water-sand mixture opens.
Zur Ausführung der vorgenannten Verfahrensmerkmale ist weiterhin vorteilhaft das Feuchtsandstrahlgerät der¬ art ausgeführt , daß es oberhalb eines Bodenabzuges des Druckbehälters eine Düse zur Einleitung von Druckwasser , Mittel zur geringen kontinuierlichen Einleitung von Druckwasser während des Befüllens und zur starken Ein- leitung von Druckwasser während des Sandstrahlens sowie Mittel zur geregelten Einleitung von Zusatzdruckwasser in den An fang des Schlauches für das Wasser-Sand-Gemisch aufweis .To carry out the aforementioned process features, the damp sandblasting device is advantageously designed such that it has a nozzle for introducing pressurized water, a means for low continuous introduction of pressurized water during filling and for the strong introduction of pressurized water during sandblasting, above a bottom outlet of the pressure vessel as well as means for the controlled introduction of additional pressurized water into the beginning of the hose for the water-sand mixture.
Zur Einstellung der genannten hohen Strahlleistung bei gleichzeitig verringertem Strahlsandverbrauσh weist vorteilhaft die Strahldüse den Eintritt für das Sand- Wasser-Gemisch hinter der Treibdüse auf , welche von dem zusätzlichen Treibmittel durchflössen wird, und für das Sandstrahlen unter Wasser ist eine Öffnung für dasIn order to set the abovementioned high blasting power while at the same time reducing blasting sand consumption, the blasting nozzle advantageously has the inlet for the sand-water mixture behind the blowing nozzle, through which the additional blowing agent flows, and there is an opening for sandblasting under water
Treibmittel vorhanden, aus dem dieses entgegengesetzt zum Strahlmittelaustritt ausströmen kann.Blowing agent available from which it can flow in the opposite direction to the blasting agent outlet.
Im folgenden wird ein Aus führungsbei spiel der Erfindung anhand von Zeichnungen näher beschrieben . Es zeigen :In the following, an embodiment of the invention is described in more detail with reference to drawings. Show it :
Figur 1 schematisch im Teilschnitt den Druckbehälter für das Sand-Druckwassergemisch ,FIG. 1 schematically, in partial section, the pressure vessel for the sand-pressure water mixture,
Figur 2 schematisch im Schnitt die Strahldüse mit der zusätzlichen Treibmittel-Zuführung undFigure 2 shows schematically in section the jet nozzle with the additional propellant supply and
Figur 3 die Treibdüse gemäß Figur 2 für das Unter¬ wasser-Strahlen.Figure 3 shows the driving nozzle according to Figure 2 for underwater blasting.
Gemäß den Figuren besteht das erfindungsgemäße Gerät aus einem Druckkessel 1 , auf welchem oben Siebe zur O 84/01738According to the figures, the device according to the invention consists of a pressure vessel 1, on which sieves for O 84/01738
Sichtung des zu verstrahlenden Sandes vorhanden sind und welcher eine Einlaßöffnung zum Eintritt des Sandes mit einer Verschlußglocke aufweist. Derartige zusätz¬ liche Einrichtungen sind bekannt und brauchen daher nicht näher beschrieben zu werden .Sifting of the sand to be blasted are present and which has an inlet opening for the entry of the sand with a sealing bell. Such additional devices are known and therefore do not need to be described in more detail.
Der Druckbehälter 1 weist Leitungen zur Zuführung von Druckwasser auf , wobei über eine Düse 8 mit gerichtetem Wasseraustritt in der Nähe der Austrittsöffnung 7 für das Wasser-Sand-Gemisch sichergestellt wird, daß -sich ein Wirbelbett einstellt, so daß ein reibungsloser und glatter Abfluß des Wasser-Sand-Gemisches aus dem unteren Bereich des Behälters 1 eingestellt wird.The pressure vessel 1 has lines for supplying pressurized water, with a nozzle 8 with directed water outlet in the vicinity of the outlet opening 7 for the water-sand mixture ensuring that a fluidized bed is set up, so that a smooth and smooth outflow of the Water-sand mixture from the lower area of the container 1 is set.
By-Pass-Leitunσen 9 sorgen dafür, daß ein gewisserBy-Pass-Leitunσen 9 ensure that a certain
Wasserstrahl auch während des Befüllens des Behälters 1 aus der Düse 8 austritt und somit Feinst sand in diese nicht eintreten kann . Damit wird ein Verstopfen der¬ selben ausgeschlossen.Water jet also emerges from the nozzle 8 during the filling of the container 1 and thus fine sand cannot enter it. This prevents clogging of the same.
II.
Unten mittig in dem Behälterboden ist der Schlauch 2 zum Abfluß des Wasser-Sand-Gemisches vorhanden und es sind Mittel 10 für die Einleitung von Zusatzwasser in den Beginn des Schlauches 2 vorhanden, welche je nach Schlauchlänge und Gegendruck eine Förderung des Wasser- Sand-Gemisches verstärken oder unterstützen.In the middle of the bottom of the container, the hose 2 is provided for the outflow of the water-sand mixture and there are means 10 for introducing additional water into the beginning of the hose 2, which, depending on the hose length and back pressure, promote the water-sand mixture strengthen or support.
Durch den Schlauch 2 wird das Wasser-Sand-Gemisch zu einer Strahldüse 3 gefördert, in welcher über eine zu- sätzliche Treibmittelleitung Druckluft oder beim Strah¬ len unter Wasser auch Druckwasser als Treibmittel für die Treibdüse 5 zugeführt wird. Durch dieses zusätz¬ liche Treibmittel wird sichergestellt, daß trotz rela¬ tiv geringer Druckwasserverbräuche eine überlegene Strahlwirkung bei geringstem Strahlmittelverbrauch ein¬ gestellt werden kann. Um den verschiedensten Anforderungen gerecht zu werden, kann gemäß Figur 2 hinter die eigentliche Treibdüse 5 eine Laval- oder Expansionsdüse angesetzt werden, welche in einen Trichter 11 mündet.Through the hose 2, the water-sand mixture is conveyed to a blasting nozzle 3, in which compressed air is supplied via an additional propellant line or, when blasting under water, also pressurized water as a propellant for the propelling nozzle 5. This additional propellant ensures that, despite relatively low pressurized water consumption, a superior blasting effect can be achieved with the lowest abrasive consumption. In order to meet the most varied of requirements, a Laval or expansion nozzle can be placed behind the actual driving nozzle 5, as shown in FIG. 2, which opens into a funnel 11.
Zum Strahlen unter Wasser ist sichergestellt, daß der Rückstoß aus der Treibdüse 5 mittels eines Treibmittel¬ strahles aufgefangen wird, der aus einer Öffnung 6 der¬ art austritt, daß eine entgegengesetzte Kraft zu dem Rückstoß erzeugt wird. Die Strahldüse 3 selbst wird in bekannter Weise über einen Handgriff 12 betätigt.For blasting under water it is ensured that the recoil from the propellant nozzle 5 is caught by means of a propellant jet which emerges from an opening 6 in such a way that an opposite force to the recoil is generated. The jet nozzle 3 itself is actuated in a known manner via a handle 12.
Das erfindungsgemäße Feuchtsandstrahlgerät arbeitet jetzt nach dem Befüllen mit Sand und Druckwasser in Ab- hängigkeit von der Betätigung des Handgriffs 12 selbst¬ tätig, wobei über ein fernbedientes Ventil 13 Zusatz¬ wasser in den Beginn des Schlauches 2 eingegeben wird. Die Menge dieses Zusatzwassers kann durch Mittel 10 ge¬ steuert werden, welche aus einer Reihe von Ventilen und überlauflei ungen besteht.The wet sand blasting device according to the invention now works automatically after filling with sand and pressurized water as a function of the actuation of the handle 12, additional water being input into the beginning of the hose 2 via a remote-controlled valve 13. The amount of this make-up water can be controlled by means 10, which consists of a series of valves and overflow lines.
Der erfindungsgemäße Feuchtsandstrahl-Druckbehälter wird über ein Reduzierventil 14 und einem Drucksicher¬ heitsventil 15 geschützt, so daß nur der gewünschte Druck innerhalb des Behälters erzeugt wird und beim Auftreten von Überdruck dieser sich automatisch ab¬ baut.The damp-sand blasting pressure vessel according to the invention is protected by a reducing valve 14 and a pressure safety valve 15, so that only the desired pressure is generated within the vessel and this automatically diminishes when excess pressure occurs.
Weiterhin sorgen ein Rückschlagventil 16 und ein Filter 17 dafür, daß aus dem unter Druck stehenden Behälter keine Rückspülung mit Verschmutzungen in die Druckwasserleitung erfolgt, die das Reduzierven¬ til 14 zusetzen könnten.Furthermore, a check valve 16 and a filter 17 ensure that no backwashing with contaminants into the pressurized water line takes place from the pressurized container, which could clog the reducing valve 14.
Das erfindungsgemäße Feuchtsandstrahlgerät ist universell einsetzbar, einfach aufgebaut und arbeitet sicher und es kann also von einer idealen Lösung der anstehenden Pro¬ bleme gesprochen werden. ~ " The wet sand blasting device according to the invention can be used universally, is simple in construction and works safely and it can therefore be said that the problems at hand are ideally solved. ~ "

Claims

_ P a t e n t a n s p r ü c h e : _ Patent claims:
1. Verfahren zum Sandstrahlen mit Feuchtsand, dadurch gekennzeichnet, daß Wasser und Sand in einem Druck- behälter vermischt und darauf zu einer Strahldüse unter Druck geleitet v/erden und daß in der Strahldüse zusätzliches Treibmittel zugeführt wird.1. A method for sandblasting with moist sand, characterized in that water and sand are mixed in a pressure vessel and then passed to a blasting nozzle under pressure and that additional blowing agent is supplied in the blasting nozzle.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß als Treibmittel Preßluft und/oder Druckwasser verwendet wird.2. The method according to claim 1, characterized in that compressed air and / or pressurized water is used as the blowing agent.
3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß für das Strahlen unter Wasser Druckwasser und/oder Preßluft als Treibmittel verwendet wird.3. The method according to claim 1, characterized in that pressurized water and / or compressed air is used as a blowing agent for blasting under water.
4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß Treibmittel zum Rückstoßausgleich aus der Strahl¬ düse auch in einer Richtung entgegengesetzt zur Aus- trittsrichtung des Strahlmittels austritt.4. The method according to claim 3, characterized in that propellant for recoil compensation emerges from the jet nozzle also in a direction opposite to the exit direction of the blasting agent.
5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß während des Feuchtsandstrahlens durch mindestens einen Wasserstrahl in dem Druck¬ behälter ein Wasser-Sand-Wirbelbett erzeugt wird.5. The method according to any one of claims 1 to 4, characterized in that a water-sand fluidized bed is generated during the damp sandblasting by at least one water jet in the pressure vessel.
6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß während des Einfüllens des Sandes in den Druck¬ behälter ein Wasserstrahl aus der das Wirbelbett erzeugenden Düse austritt und so einen Eintritt von Feinstsand in diese verhindert.6. The method according to claim 5, characterized in that a water jet emerges from the nozzle producing the fluidized bed during the filling of the sand into the pressure container and thus prevents the entry of fine sand into it.
7. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß dem Wasser-Sand-Gemisch nach Austritt aus dem Druckbehälter geregelt Zusatz- Druckwasser zugeführt wird.7. The method according to any one of claims 1 to 5, characterized in that the water-sand mixture is regulated after exiting the pressure vessel additional pressurized water is supplied.
8. Feuchtsandstrahlgerät zur Durchführung des Verfahrens . nach einem der vorhergehenden Ansprüche, das einen mit Strahlsand gefüllten Druckbehälter und Zuleitun¬ gen für Druckwasser aufweist, dadurch gekennzeich¬ net, daß eine mit dem Druckbehälter (1) über einen Schlauch (2) verbundene Strahldüse (3) für den Feucht¬ sand vorhanden ist, die Strahldüse (3) mit einer zusätzlichen Treibmittelleitung (4) verbunden ist und eine Treibdüse (5) aufweist, in der der Schlauch (2) für das Wasser-Sand-Gemisch mündet.8. Wet sand blasting device for performing the method , According to one of the preceding claims, which has a pressure vessel filled with blasting sand and supply lines for pressurized water, characterized in that a jet nozzle (3) connected to the pressure vessel (1) via a hose (2) is provided for the damp sand the jet nozzle (3) is connected to an additional propellant line (4) and has a propellant nozzle (5) in which the hose (2) for the water-sand mixture opens.
9. Feuchtsandstrahlgerät nach Anspruch 8, dadurch ge¬ kennzeichnet, daß die Strahldüse (3) den Eintritt für das Sand-Wasser-Gemisch hinter der Treibdüse aufweist.9. Wet sand blasting device according to claim 8, characterized ge indicates that the blasting nozzle (3) has the inlet for the sand-water mixture behind the driving nozzle.
10. Feuchtsandstrahlgerät nach Anspruch 9, für das Sand¬ strahlen unter Wasser, gekennzeichnet durch minde¬ stens eine Öffnung (6) für den Austritt von Treib¬ mittel entgegengesetzt zum Strahlmittelaustritt.10. Wet sand blasting device according to claim 9, for sand blasting under water, characterized by at least one opening (6) for the discharge of propellant opposite to the blasting agent outlet.
11. Feuchtsandstrahlgerät nach einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, daß es oberhalb eines Bodenabzuges (7) des Druckbehälters (1) eine Düse (8) zur Einleitung von Druckwasser, Mittel (9) zur geringen kontinuierlichen Einleitung von Druck¬ wasser während des Befüllens und zur starken Einlei¬ tung von Druckwasser während des Sandstrahlens sowie Mittel (10) zur geregelten Einleitung von Zu¬ satzdruckwasser in den Anfang des Schlauches (2) für das Wasser-Sand-Gemisch aufweist. 11. Wet sand blasting device according to one of claims 8 to 10, characterized in that it has a nozzle (8) for introducing pressurized water, means (9) for low continuous introduction of pressurized water while above a floor drain (7) of the pressure vessel (1) of filling and for the strong introduction of pressurized water during sandblasting and means (10) for the controlled introduction of additional pressurized water into the beginning of the hose (2) for the water-sand mixture.
EP83903384A 1982-10-25 1983-10-21 Method for sand-blasting by means of wet sand Expired EP0122928B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83903384T ATE39640T1 (en) 1982-10-25 1983-10-21 WET SAND BLASTING PROCESS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3239429 1982-10-25
DE19823239429 DE3239429A1 (en) 1982-10-25 1982-10-25 METHOD AND DEVICE FOR OPERATING A HIGH-PRESSURE HEATER

Publications (2)

Publication Number Publication Date
EP0122928A1 true EP0122928A1 (en) 1984-10-31
EP0122928B1 EP0122928B1 (en) 1989-01-04

Family

ID=6176526

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83903384A Expired EP0122928B1 (en) 1982-10-25 1983-10-21 Method for sand-blasting by means of wet sand

Country Status (12)

Country Link
EP (1) EP0122928B1 (en)
JP (1) JPS59502138A (en)
KR (1) KR840006458A (en)
AT (1) ATE39640T1 (en)
AU (1) AU578233B2 (en)
BR (1) BR8307590A (en)
CA (1) CA1260714A (en)
DE (2) DE3239429A1 (en)
GR (1) GR79647B (en)
MX (1) MX157294A (en)
WO (1) WO1984001738A1 (en)
ZA (1) ZA837813B (en)

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DE4035358A1 (en) * 1990-11-07 1992-05-21 Johannes Dieter Disposal of asbestos containing material is removed from its supporting substrate by high pressure water jets and put in receptacle, together with water and heated furnace for converting into harmless form
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Also Published As

Publication number Publication date
AU2123383A (en) 1984-05-22
JPS59502138A (en) 1984-12-27
GR79647B (en) 1984-10-31
ZA837813B (en) 1984-06-27
EP0122928B1 (en) 1989-01-04
BR8307590A (en) 1984-09-25
ATE39640T1 (en) 1989-01-15
DE3239429A1 (en) 1984-04-26
DE3378819D1 (en) 1989-02-09
AU578233B2 (en) 1988-10-20
MX157294A (en) 1988-11-11
CA1260714A (en) 1989-09-26
WO1984001738A1 (en) 1984-05-10
KR840006458A (en) 1984-11-30

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