EP0061166B1 - Pressure chamber abrasive blasting device - Google Patents

Pressure chamber abrasive blasting device Download PDF

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Publication number
EP0061166B1
EP0061166B1 EP82102253A EP82102253A EP0061166B1 EP 0061166 B1 EP0061166 B1 EP 0061166B1 EP 82102253 A EP82102253 A EP 82102253A EP 82102253 A EP82102253 A EP 82102253A EP 0061166 B1 EP0061166 B1 EP 0061166B1
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EP
European Patent Office
Prior art keywords
blasting
container
pressure medium
medium
control valve
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EP82102253A
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German (de)
French (fr)
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EP0061166A2 (en
EP0061166A3 (en
Inventor
Heinz Brennecke
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Individual
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Individual
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24CABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0046Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
    • B24C7/0069Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier with means for preventing clogging of the equipment or for preventing abrasive entering the airway

Definitions

  • the invention relates to a pressure chamber blasting device consisting of a blasting agent container with a blasting agent insertion opening which can be closed by means of a cone and a blasting nozzle connected to the blasting agent container by means of a blasting hose, the blasting agent container and the blasting hose being connected to a compressed air source via a pressure medium control valve and the closing cone in the pressure medium supply line leading into the container is guided such that it is actuated in the closing direction by the inflowing pressure medium.
  • the pressure chamber blasting devices of this type have proven themselves well in that good blasting results are achieved with their help.
  • the abrasive medium container remains under pressure after the pressure medium control valve is closed and the pressure relief or venting until the air stored in the blast medium container is completely blown off after the control valve designed as a two-way valve is switched off the blasting hose or via the blasting nozzle with the appropriate subsequent blasting of the blasting medium.
  • the aim of the present invention is to provide a pressure chamber jet device of the type described, in which the pressure relief of the container and the pressure medium lines takes place automatically, and the invention is that a two / three-way valve is provided as the pressure medium control valve, which is used by a further two / three-way valve Push button is pneumatically actuated and the pressure medium control valve controls a pressure medium line branching to the blasting medium container and the blasting hose, a water separator being arranged between the pressure medium control valve and the container before the branching, and a check valve being arranged in the branch leading to the blasting hose.
  • the invention provides a pressure chamber blasting device in which, at the same time as the pressure medium flow is blocked, the container is vented by automatically opening the container to the atmosphere via the pressure medium supply line, which now serves as the ventilation line, and the R port of the control valve. This means that the additional vent valve attached to the boiler can be dispensed with; all the required functions are controlled in one valve.
  • pressure chamber blasting device Another significant advantage of the pressure chamber blasting device according to the invention can also be seen in the fact that the pressure is not relieved directly via a valve that opens directly to the atmosphere, but via the closing cone guide located in the dome of the container, through which no or at most negligible small amounts of wear the abrasive that caused it is entrained outside
  • the pressure medium control valve is reversed immediately upon closing the button and thereby pressure relief takes place via the pressure medium line.
  • the water separator downstream of the pressure medium control valve serves as a self-cleaning dust filter in this air flow direction, through which both the pressure medium
  • the control valve and the atmosphere are reliably protected from any type of entrained dust or blasting media and are cleaned by backwashing immediately when the blasting process is resumed by the compressed air flowing back into the container or the blasting hose.
  • the blasting agent located in the blasting hose and entrained with the refluxing air is therefore only returned to the container and held back by the blasting agent column, whereby blasting agent entrained from the blasting agent column or entrained dust particles are essentially retained at the closing cone of the container filling opening. Any particulate matter that is entrained is then filtered out in the water separator.
  • the invention is illustrated, for example, in the schematic representation of a pressure chamber blasting device with an automatically pneumatically controlled control valve drawing.
  • 1 denotes the blasting agent container of a pressure chamber blasting device, which is provided with a blasting agent filling opening 3 which can be closed by means of the closing cone 2 and a blasting nozzle (not shown) connected to the blasting agent container 1 by means of blasting hose 4, the blasting agent container 1 and the blasting hose 4 being provided with a pressure medium control valve a compressed air source are connected and the closing cone 2 is guided in the pressure medium supply line 6 leading into the container such that it is actuated in the closing direction by the inflowing pressure medium.
  • the pressure medium control valve is formed by a two / three-way valve 5, which is actuated pneumatically by means of a two / three-way valve 7 as a button arranged on the blasting nozzle and controls a branching line at 10, from which one branch 6 to the blasting agent container and the other branch 8 leads to the blasting hose.
  • a water separator 9 is arranged between the pressure medium valve 5 and the branch 10, while in the line 8 leading to the blasting hose 4 directly behind the branch 10, i. H.
  • a check valve 12 is arranged at a large distance from the blasting nozzle or the blasting agent inlet 11.
  • the pressure path from the compressor supply line 13 to the Z connection of the pressure medium control valve is released, whereby the pressure chamber jet device is acted upon with compressed air by closing the R connection and opening the pressure medium path from P to A of this valve.
  • the closing cone 2 is raised, thus closing the blasting agent filling opening 3 and consequently building up pressure in the container 1, the check valve 12 is opened at the same time as the pressure builds up, and the pressure medium path is released into the blasting hose, into which the blasting medium comes out of the container 1 is fed into the mouth 11 under the pressure building up there.
  • the separator 9 acts as a water separator, on the sintering insert 9a of which the moisture introduced with the air condenses, which drips into the bottom of the separator and can be removed from time to time via the bottom valve.
  • the P connection of the pressure medium control valve 5 is closed and its R connection is opened towards A, whereby the entire device is opened to the atmosphere.
  • the check valve 12 is first closed, thereby preventing the air from flowing back via the line 8 and, in particular, from the blasting hose 4 flowing back beyond the valve. Rather, the pressure medium and blasting medium return flow takes place completely via the container 1, in which the blasting medium flowing back from the blasting hose 4 is collected. Any abrasive that is entrained from the blasting agent column and entrained dust particles primarily catch on the closing cone 2 and fall back into the container. Residual dust quantities passing into the line 6 are caught in the sintering insert 9a of the water separator 9, which acts as a dust filter in this phase. The valve 5 and the atmosphere are completely protected against dust.

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  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Cleaning In General (AREA)
  • Knitting Machines (AREA)
  • Air Bags (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Spray Control Apparatus (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Safety Valves (AREA)
  • Processing Of Meat And Fish (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

1. Pressure chamber abrasive blasting device, comprising a blasting medium container (1) provided with a blasting medium filler aperture (3) which is sealable by means of sealing cone (2), and comprising a blasting nozzle connected to the blasting medium container (1) by means of blasting hose (4), wherein the blasting medium container (1) and the blasting hose (4) are connected to a source of compressed air through the intermediary of a pressure medium control valve (5), and the sealing cone (2) extends into the pressure medium supply line (6), which extends into the container (1), in such a manner that said cone is actuated into its sealing direction by the inflowing pressure medium, characterised in that a two-/three-way valve is provided as the pressure medium control valve (5) and is pneumatically actuable by an additional two-/three way valve serving as sensor (7), and the pressure medium control valve (5) controls a pressure medium line which forms branches to the blasting medium container (1) and to the blasting hose (4), wherein a water separator (9) is disposed between the pressure medium control valve (5) and the container (1) upstream of the branching junction (10), and a non-return valve (12) is disposed in the branch (8) extending to the blasting hose (4).

Description

Die Erfindung betrifft ein Druckkammerstrahlgerät, bestehend aus einem Strahlmittelbehälter mit einer mittels Schließkegel verschließbaren Strahlmitteleinführöffnung und einer mittels Strahlschlauch mit dem Strahlmittelbehälter verbundenen Strahldüse, wobei der Strahlmittelbehälter und der Strahlschlauch über ein Druckmittelsteuerventil mit einer Druckluftquelle verbunden sind und der Schließkegel in der in den Behälter führenden Druckmittelzuführungsleitung derart geführt ist, daß er von dem einströmenden Druckmittel in Schließrichtung betätigt wird.The invention relates to a pressure chamber blasting device consisting of a blasting agent container with a blasting agent insertion opening which can be closed by means of a cone and a blasting nozzle connected to the blasting agent container by means of a blasting hose, the blasting agent container and the blasting hose being connected to a compressed air source via a pressure medium control valve and the closing cone in the pressure medium supply line leading into the container is guided such that it is actuated in the closing direction by the inflowing pressure medium.

Die Druckkammerstrahlgeräte dieser Art haben sich insofern gut bewährt, als mit ihrer Hilfe gute Strahlergebnisse erzielt werden. Es bestehen jedoch eine Reihe von Nachteilen funktioneller Art, so insbesondere der Nachteil, daß der Strahlmittelbehälter nach dem Schließen des Druckmittelsteuerventils zunächst unter Druck verbleibt und die Druckentlastung bzw. Entlüftung bis zum vollständigen Abblasen der im Strahlmittelbehälter gespeicherten Luft nach Abstellung des als Zweiwegeventil ausgeführten Steuerventils über den Strahlschlauch bzw. über die Strahldüse unter entsprechend Nachverstrahlung von Strahlmittel möglich ist.The pressure chamber blasting devices of this type have proven themselves well in that good blasting results are achieved with their help. However, there are a number of disadvantages of a functional nature, in particular the disadvantage that the abrasive medium container remains under pressure after the pressure medium control valve is closed and the pressure relief or venting until the air stored in the blast medium container is completely blown off after the control valve designed as a two-way valve is switched off the blasting hose or via the blasting nozzle with the appropriate subsequent blasting of the blasting medium.

Zur Vermeidung dieses Nachteils ist es beispielsweise aus der US-A-2 729 917 bekannt, die Düse mit einem Sperrventil zu versehen und an dem Strahlmittelbehälter zur Ermöglichung einer Druckentlastung des Behälters ein weiteres Ventil als Entlüftungsventil anzubringen, über das nach der Strahlung der Behälter, beispielsweise zum Zwecke der Nachfüllung von Strahlmittel, druckentlastet werden kann. Es wird hierdurch zwar ein Abstellen des Gerätes durch einen an der Strahldüse selbst angebrachten Absteller ermöglicht, so daß es der andernfalls erforderliche Zurücklegung eines mehr oder weniger weiten Weges bis zum gerätefesten Hauptsteuerventil unter vollem Strahlmitteldurchfluß nicht mehr bedarf, die nach dem Strahlvorgang erforderliche und vorgeschriebene Druckentlastung des Strahlmittelbehälters kann jedoch nach wie vor nur am Behälter selbst erfolgen, wobei bei der Öffnung des Ventils von der plötzlich aus dem Strahlschlauch durch die Strahlmittelsäule hindurch rückfließenden Luft ebenfalls große Mengen an Strahlmittel mitgerissen und aus dem Strahlmittelbehälter durch das Entlüftungsventil ausgetragen werden, das demgemäß durch das seiner Natur nach scharfe Strahlmittel einem großen Verschleiß unterliegt. Darüber hinaus ergeben sich hierdurch größere Mengen an Strahlmittelverlusten und eine insbesondere in geschlossenen Räumen untragbare Verstaubung der Umgebung. Ebenso unterliegt der an der Strahldüse angebrachte Absteller einem ganz erheblichen Verschleiß, da während der Verstrahlung das gesamte Strahlmittel durch die Kegelbohrung des Abstellers fließt.To avoid this disadvantage, it is known, for example from US Pat. No. 2,729,917, to provide the nozzle with a shut-off valve and to attach a further valve to the blasting agent container to enable the container to be relieved of pressure, as a ventilation valve, via which, after the radiation of the containers, for example for the purpose of refilling blasting media, can be relieved of pressure. This makes it possible to switch off the device by a switch attached to the blasting nozzle itself, so that the otherwise necessary covering of a more or less long way to the fixed main control valve with full blasting medium flow no longer requires the pressure relief required and prescribed after the blasting process However, the blasting agent container can still only be carried out on the container itself, and when the valve is opened, large amounts of blasting agent are also entrained by the air suddenly flowing back through the blasting tube through the blasting agent column and are discharged from the blasting agent container through the breather valve that by its nature sharp abrasives are subject to great wear. In addition, this results in larger amounts of abrasive loss and dust in the environment, which is particularly intolerable in closed rooms. Likewise, the rack attached to the blasting nozzle is subject to very considerable wear, since the entire blasting medium flows through the cone bore of the rack during blasting.

Es ist schließlich aus der BE-A-409 758 bekannt, den Druckmittelbehälter mit einem Vierwege-Ventil zu versehen, mit dessen Hilfe der Strahlschlauch und der Druckmittelbehälter über getrennte Leitungen sowohl gleichzeitig beaufschlagt als auch gleichzeitig entlüftet werden können. Es ergeben sich bei dieser bekannten Einrichtung dieselben Nachteile wie bei den vorstehend beschriebenen Anordnungen, daß die Druckentlastung des Strahlmittelbehälters nur am Behälter selbst erfolgen kann, wobei große Mengen an Strahlmittel über das Steuerventil ausgetragen werden, das - bei entsprechend hohen Strahlmittelverlusten - demgemäß einem großen Verschleiß unterliegt.Finally, it is known from BE-A-409 758 to provide the pressure medium container with a four-way valve, with the aid of which the blasting hose and the pressure medium container can be acted upon simultaneously as well as vented via separate lines. This known device has the same disadvantages as in the arrangements described above, that the pressure relief of the blasting agent container can only take place on the container itself, with large amounts of blasting agent being discharged via the control valve, which - with correspondingly high blasting agent losses - correspondingly causes great wear subject to.

Ziel der vorliegenden Erfindung ist die Schaffung eines Druckkammerstrahlgerätes der beschriebenen Art, bei dem die Druckentlastung des Behälters und der Druckmittelleitungen selbsttätig erfolgt und die Erfindung besteht darin, daß als Druckmittelsteuerventil ein Zwei-/ Dreiwegeventil vorgesehen ist, das von einem weiteren Zwei-/Dreiwegeventil als Taster pneumatisch betätigbar ist und das Druckmittelsteuerventil eine sich zum Strahlmittelbehälter und zum Strahlschlauch verzweigende Druckmittelleitung steuert, wobei zwischen dem Druckmittelsteuerventil und dem Behälter vor der Verzweigung ein Wasserabscheider und in dem zum Strahlschlauch führenden Zweig ein Rückschlagventil angeordnet sind.The aim of the present invention is to provide a pressure chamber jet device of the type described, in which the pressure relief of the container and the pressure medium lines takes place automatically, and the invention is that a two / three-way valve is provided as the pressure medium control valve, which is used by a further two / three-way valve Push button is pneumatically actuated and the pressure medium control valve controls a pressure medium line branching to the blasting medium container and the blasting hose, a water separator being arranged between the pressure medium control valve and the container before the branching, and a check valve being arranged in the branch leading to the blasting hose.

Durch die Erfindung ist ein Druckkammerstrahlgerät geschaffen, bei dem gleichzeitig mit dem Sperren des Druckmittelzuflusses die Entlüftung des Behälters dadurch erfolgt, daß der Behälter über die nunmehr als Entlüftungsleitung dienende Druckmittelzuführungsleitung sowie den R-Anschluß des Steuerventils automatisch gegen Atmosphäre geöffnet wird. Es kann somit das zusätzlich am Kessel angebrachte Entlüftungsventil entfallen, es werden alle erforderlichen Funktionen in einem Ventil gesteuert. Ein weiterer wesentlicher Vorteil des erfindungsgemäßen Druckkammerstrahlgerätes ist auch darin zu sehen, daß die Druckentlastung nicht auf direktem Wege über ein unmittelbar gegen Atmosphäre öffnendes Ventil erfolgt, sondern über die im Dom des Behälters sitzende Schließkegelführung, durch die hindurch keine oder allenfalls vernachläßigbar kleine Mengen an Verschleiß verursachendem Strahlmittel nach außen mitgerissen werden. Es wird darüber hinaus nicht nur eine selbsttätige Entlüftung des Gerätes gleichzeitig mit der Sperrung des Druckmittelzuflusses erreicht, es erfolgt darüber hinaus die gesamte Druckmittel- und Strahlmittelsteuerung von der Strahldüse aus in der Weise, daß unmittelbar mit dem Schließen des Tasters das Druckmittelsteuerventil umgesteuert wird und hierdurch eine Druckentlastung über die Druckmittelleitung erfolgt. Hierbei dient der dem Druckmittelsteuerventil nachgeordnete Wasserabscheider in dieser Luftströmrichtung als selbstreinigendes Staubfilter, durch das sowohl das Druckmittelsteuerventil als auch die Atmosphäre zuverlässig vor jeder Art mitgerissenem Staub bzw. Strahlmittel geschützt und das unmittelbar bei Wiederaufnahme des Strahlvorganges durch die nunmehr wieder in den Behälter bzw. den Strahlschlauch einströmende Druckluft durch Rückspülung gereinigt wird.The invention provides a pressure chamber blasting device in which, at the same time as the pressure medium flow is blocked, the container is vented by automatically opening the container to the atmosphere via the pressure medium supply line, which now serves as the ventilation line, and the R port of the control valve. This means that the additional vent valve attached to the boiler can be dispensed with; all the required functions are controlled in one valve. Another significant advantage of the pressure chamber blasting device according to the invention can also be seen in the fact that the pressure is not relieved directly via a valve that opens directly to the atmosphere, but via the closing cone guide located in the dome of the container, through which no or at most negligible small amounts of wear the abrasive that caused it is entrained outside In addition, not only is an automatic venting of the device achieved simultaneously with the blocking of the pressure medium inflow, it is also the entire pressure medium and blasting medium control from the blasting nozzle in such a way that the pressure medium control valve is reversed immediately upon closing the button and thereby pressure relief takes place via the pressure medium line. Here, the water separator downstream of the pressure medium control valve serves as a self-cleaning dust filter in this air flow direction, through which both the pressure medium The control valve and the atmosphere are reliably protected from any type of entrained dust or blasting media and are cleaned by backwashing immediately when the blasting process is resumed by the compressed air flowing back into the container or the blasting hose.

Durch die Einbringung eines Rückschlagventils, dessen Anordnung zweckmäßig in möglichst weitem Abstand von der Einmündung in den Strahlschlauch erfolgt, wird weiterhin erreicht, daß bei Schließen des Tastventils und bei dem hierdurch bedingten Öffnen des Druckmittelsteuerventils gegen Atmosphäre die in dieser Verzweigung rückströmende Luft das Rückschlagventil noch im Bereich der Luftsäule schließt, d. h. bevor das mit der Luft mitgerissene Strahlmittel das Rückschlagventil erreicht oder gar passiert hat. Es wird hierdurch das Rückschlagventil selbst gegen Verschleiß geschützt, weiterhin der in dieser Betriebsphase als Filter wirkende Wasserabscheider gegen Überbelastung durch eine übermäßige Menge an rückströmendem Strahlmittel. Das im Strahlschlauch befindliche, mit der rückfließenden Luft mitgerissene Strahlmittel wird somit ausschließlich in den Behälter zurückgebracht und von der Strahlmittelsäule zurückgehalten, wobei etwa aus der Strahlmittelsäule mitgerissenes Strahlmittel bzw. mitgerissene Staubanteile im wesentlichen am Schließkegel der Behältereinfüllöffnung zurückgehalten werden. Dann noch evtl. mitgerissene Feinstaubteile werden im Wasserabscheider ausgefiltert.By introducing a check valve, the arrangement of which is expediently located as far as possible from the junction in the blasting hose, it is further achieved that when the pushbutton valve closes and the pressure medium control valve is opened to the atmosphere due to this, the air flowing back in this branch branches the check valve still in Area of the air column closes, d. H. before the blasting medium entrained in the air has reached or even passed the check valve. The check valve itself is thereby protected against wear, and the water separator, which acts as a filter in this operating phase, is protected against overload due to an excessive amount of blasting medium flowing back. The blasting agent located in the blasting hose and entrained with the refluxing air is therefore only returned to the container and held back by the blasting agent column, whereby blasting agent entrained from the blasting agent column or entrained dust particles are essentially retained at the closing cone of the container filling opening. Any particulate matter that is entrained is then filtered out in the water separator.

Die Erfindung ist in der eine schematische Darstellung eines Druckkammerstrahlgerätes mit selbsttätig pneumatisch gesteuertem Regelventil wiedergebenden Zeichnung beispielsweise veranschaulicht.The invention is illustrated, for example, in the schematic representation of a pressure chamber blasting device with an automatically pneumatically controlled control valve drawing.

In der Zeichnung ist mit 1 der Sfrahlmittelbehälter eines Druckkammerstrahlgerätes bezeichnet, der mit einer mittels Schließkegel 2 verschließbaren Strahlmitteleinfüllöffnung 3 und einer mittels Strahlschlauch 4 mit dem Strahlmittelbehälter 1 verbundenen Strahldüse (nicht gezeichnet) versehen, wobei der Strahlmittelbehälter 1 und der Strahlschlauch 4 über ein Druckmittelsteuerventil mit einer Druckluftquelle verbunden sind und der Schließkegel 2 in der in den Behälter führenden Druckmittelzuführungsleitung 6 derart geführt ist, daß er von dem einströmenden Druckmittel in Schließrichtung betätigt wird.In the drawing, 1 denotes the blasting agent container of a pressure chamber blasting device, which is provided with a blasting agent filling opening 3 which can be closed by means of the closing cone 2 and a blasting nozzle (not shown) connected to the blasting agent container 1 by means of blasting hose 4, the blasting agent container 1 and the blasting hose 4 being provided with a pressure medium control valve a compressed air source are connected and the closing cone 2 is guided in the pressure medium supply line 6 leading into the container such that it is actuated in the closing direction by the inflowing pressure medium.

Das Druckmittelsteuerventil ist von einem Zwei-/Dreiwegeventil 5 gebildet, das mittels eines Zwei-/Dreiwegeventil 7 als an der Strahldüse angeordnetem Taster pneumatisch betätigt wird und eine sich bei 10 verzweigende Leitung steuert, von der ein Zweig 6 zum Strahlmittelbehälter und der andere Zweig 8 zum Strahlschlauch führt. Zwischen dem Druckmittelventil 5 und der Verzweigung 10 ist ein Wasserabscheider 9 angeordnet, während in der zum Strahlschlauch 4 führenden Leitung 8 unmittelbar hinter der Verzweigung 10, d. h. in großem Abstand zur Strahldüse bzw. zum Strahlmitteleinlauf 11 ein Rückschlagventil 12 angeordnet ist.The pressure medium control valve is formed by a two / three-way valve 5, which is actuated pneumatically by means of a two / three-way valve 7 as a button arranged on the blasting nozzle and controls a branching line at 10, from which one branch 6 to the blasting agent container and the other branch 8 leads to the blasting hose. A water separator 9 is arranged between the pressure medium valve 5 and the branch 10, while in the line 8 leading to the blasting hose 4 directly behind the branch 10, i. H. a check valve 12 is arranged at a large distance from the blasting nozzle or the blasting agent inlet 11.

Durch Betätigung des Tasters 7 wird der Druckweg von der Kompressorzuleitung 13 zum Z-Anschluß des Druckmittelsteuerventils freigegeben, wodurch unter Schließen des R-Anschlusses und Öffnen des Druckmittelweges von P nach A dieses Ventils das Druckkammerstrahlgerät mit Druckluft beaufschlagt wird. Unter der Wirkung der einströmenden Druckluft wird der Schließkegel 2 gehoben, somit die Strahlmitteleinfüllöffnung 3 geschlossen und infolgedessen im Behälter 1 Druck aufgebaut, es wird gleichzeitig mit dem Druckaufbau das Rückschlagventil 12 geöffnet und der Druckmittelweg in den Strahlschlauch freigegeben, in den das Strahlmittel aus dem Behälter 1 unter dem sich dort aufbauenden Druck in die Einmündung 11 eingespeist wird. In dieser Betriebsphase wirkt der Abscheider 9 als Wasserabscheider, an dessen Sintereinsatz 9a sich die mit der Luft eingebrachte Feuchtigkeit niederschlägt, die in den Sumpf des Abscheiders abtropft und von Zeit zu Zeit über das Bodenventil abgezogen werden kann.By pressing the button 7, the pressure path from the compressor supply line 13 to the Z connection of the pressure medium control valve is released, whereby the pressure chamber jet device is acted upon with compressed air by closing the R connection and opening the pressure medium path from P to A of this valve. Under the action of the inflowing compressed air, the closing cone 2 is raised, thus closing the blasting agent filling opening 3 and consequently building up pressure in the container 1, the check valve 12 is opened at the same time as the pressure builds up, and the pressure medium path is released into the blasting hose, into which the blasting medium comes out of the container 1 is fed into the mouth 11 under the pressure building up there. In this operating phase, the separator 9 acts as a water separator, on the sintering insert 9a of which the moisture introduced with the air condenses, which drips into the bottom of the separator and can be removed from time to time via the bottom valve.

Beim Entlasten des Tasters 7 wird der P-Anschluß des Druckmittelsteuerventils 5 geschlossen und sein R-Anschluß gegen A geöffnet, wodurch das gesamte Gerät gegen Atmosphäre geöffnet wird. Infolge der Druckentlastung wird zunächst das Rückschlagventil 12 geschlossen, wodurch ein Rückströmen der Luft über die Leitung 8 und insbesondere ein Rückfließen von Strahlmittel aus dem Strahlschlauch 4 über das Ventil hinaus verhindert ist. Der Druckmittel- und Strahlmittelrückfluß erfolgt vielmehr vollständig über den Behälter 1, in dem das aus dem Strahlschlauch 4 rückfließende Strahlmittel aufgefangen wird. Aus der Strahlmittelsäule eventuell mitgerissenes Strahlmittel und mitgerissene Staubteile fangen sich primär am Schließkegel 2 und fallen in den Behälter zurück, in die Leitung 6 übertretende Reststaubmengen werden im Sintereinsatz 9a des in dieser Phase als Staubfilter wirkenden Wasserabscheiders 9 gefangen. Das Ventil 5 und die Atmosphäre sind vollständig gegen Staub geschützt.When the button 7 is released, the P connection of the pressure medium control valve 5 is closed and its R connection is opened towards A, whereby the entire device is opened to the atmosphere. As a result of the pressure relief, the check valve 12 is first closed, thereby preventing the air from flowing back via the line 8 and, in particular, from the blasting hose 4 flowing back beyond the valve. Rather, the pressure medium and blasting medium return flow takes place completely via the container 1, in which the blasting medium flowing back from the blasting hose 4 is collected. Any abrasive that is entrained from the blasting agent column and entrained dust particles primarily catch on the closing cone 2 and fall back into the container. Residual dust quantities passing into the line 6 are caught in the sintering insert 9a of the water separator 9, which acts as a dust filter in this phase. The valve 5 and the atmosphere are completely protected against dust.

Claims (2)

1. Pressure chamber abrasive blasting device, comprising a blasting medium container (1) provided with a blasting medium filler aperture (3) which is sealable by means of sealing cone (2), and comprising a blasting nozzle connected to the blasting medium container (1) by means of blasting hose (4), wherein the blasting medium container (1) and the blasting hose (4) are connected to a source of compressed air through the intermediary of a pressure medium control valve (5), and the sealing cone (2) extends into the pressure medium supply line (6), which extends into the container (1), in such a manner that said cone is actuated into its sealing direction by the inflowing pressure medium, characterised in that a two-/three-way valve is provided as the pressure medium control valve (5) and is pneumatically actuable by an additional two-/ three way valve serving as sensor (7), and the pressure medium control valve (5) controls a pressure medium line which forms branches to the blasting medium container (1) and to the blasting hose (4), wherein a water separator (9) is disposed between the pressure medium control valve (5) and the container (1) upstream of the branching junction (10), and a non-return valve (12) is disposed in the branch (8) extending to the blasting hose (4).
2. Pressure chamber abrasive blasting device according to claim 1, characterised in that the non-return valve (12) is disposed the furthest possible distance upstream of the discharge point into the blasting hose (4).
EP82102253A 1981-03-24 1982-03-19 Pressure chamber abrasive blasting device Expired EP0061166B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82102253T ATE15004T1 (en) 1981-03-24 1982-03-19 PRESSURE BLASTING DEVICE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813111581 DE3111581A1 (en) 1981-03-24 1981-03-24 PRINT CHAMBER JET
DE3111581 1981-03-24

Publications (3)

Publication Number Publication Date
EP0061166A2 EP0061166A2 (en) 1982-09-29
EP0061166A3 EP0061166A3 (en) 1982-10-27
EP0061166B1 true EP0061166B1 (en) 1985-08-21

Family

ID=6128159

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82102253A Expired EP0061166B1 (en) 1981-03-24 1982-03-19 Pressure chamber abrasive blasting device

Country Status (5)

Country Link
EP (1) EP0061166B1 (en)
AT (1) ATE15004T1 (en)
DE (1) DE3111581A1 (en)
DK (1) DK169205B1 (en)
FI (1) FI72448C (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8501288A (en) * 1985-05-07 1986-12-01 Rijndelta Coating Technieken B GRIT BLASTING DEVICE.
DE8907765U1 (en) * 1989-06-24 1989-10-05 Keizers, geb. Kalle, Sigrid, 46325 Borken Device for separating liquid from granular or granular blasting media
DE3939420C2 (en) * 1989-11-29 1995-06-22 Neubauer Geb Costas Perez Merc Method and device for cutting resistant materials with a water jet
IT1249665B (en) * 1991-06-19 1995-03-09 Cie Dentalfarm S R L MICROSANDBLASTING SYSTEM AND PNEUMATIC VALVE USED IN THIS SYSTEM
DE19521051C2 (en) * 1995-06-09 1998-04-09 Woma Maasberg Co Gmbh W High pressure water jet processing device

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE409758A (en) *
US1171286A (en) * 1912-04-22 1916-02-08 Howard L Wadsworth Sand-blast machine.
US2729917A (en) * 1953-06-30 1956-01-10 William C Gregory Cleaning apparatus
US3034263A (en) * 1959-08-07 1962-05-15 Ruric N Mcdaniel Sand blasting apparatus
US3084484A (en) * 1960-11-17 1963-04-09 Sylvania Electric Prod Pneumatic abrasive cutting apparatus
US3148484A (en) * 1963-01-15 1964-09-15 Jaroco Internat Inc Sandblast generator
FR1515965A (en) * 1966-03-31 1968-06-13 Compressed air sandblaster
US3741738A (en) * 1971-04-12 1973-06-26 Pauli & Griffin Co Abrasive blasting equipment and self-cleaning abrasive trap therefore
US4026072A (en) * 1976-08-09 1977-05-31 Dremann George H Self-cleaning muffler for an abrasive blast system

Also Published As

Publication number Publication date
FI72448B (en) 1987-02-27
FI821011L (en) 1982-09-25
EP0061166A2 (en) 1982-09-29
EP0061166A3 (en) 1982-10-27
ATE15004T1 (en) 1985-09-15
DK117882A (en) 1982-09-25
DE3111581C2 (en) 1987-11-12
DE3111581A1 (en) 1982-10-14
DK169205B1 (en) 1994-09-12
FI821011A0 (en) 1982-03-23
FI72448C (en) 1987-06-08

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