EP0850727A2 - Blast gun for wet blasting - Google Patents

Blast gun for wet blasting Download PDF

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Publication number
EP0850727A2
EP0850727A2 EP97123037A EP97123037A EP0850727A2 EP 0850727 A2 EP0850727 A2 EP 0850727A2 EP 97123037 A EP97123037 A EP 97123037A EP 97123037 A EP97123037 A EP 97123037A EP 0850727 A2 EP0850727 A2 EP 0850727A2
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EP
European Patent Office
Prior art keywords
liquid
blasting
jet
nozzle
gas
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
EP97123037A
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German (de)
French (fr)
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EP0850727A3 (en
EP0850727B1 (en
Inventor
Josef Bauer
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Bauer Andreas
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Individual
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Filing date
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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
    • B24C7/0084—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
    • 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
    • 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
    • B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
    • B24C7/0076—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier the blasting medium being a liquid stream

Definitions

  • the present invention relates to a blasting gun according to the preamble of claim 1.
  • the object of the present invention is to avoid these disadvantages and the invention accordingly shows a blasting gun, which can be used especially in the context of a plant, as is the subject of DE 196 23 024.1, so that the present Invention as the formation of an essential part of the older Invention can be seen.
  • a blasting hose is led to the center piece and with one Connection clamp held on the inlet pipe.
  • the inlet pipe is at the junction with the blasting hose with a bead trained to prevent it from slipping.
  • the inlet pipe is provided with a thread in the middle part that connects to the centerpiece.
  • the center piece with outlet nozzle and Pick-up tube has two internal thread points for connection with the nozzle assembly, the connection also with Quick closures is possible.
  • the outlet nozzle has a nozzle shape, how it will be described.
  • the water jet nozzle can basically be replaced as desired if it only gives the desired rinsing effect.
  • Switching valve is a ball needle or slide valve possible. With the basic equipment of the valve, the water is in the Center piece of the jet nozzle unit initiated and the way to Rinsing pipe released. The holes in the flushing nozzles are relative large ⁇ so that the pressure drops due to the increased water passage.
  • a pressure difference switch switches the boiler system off and only the water pump is running. Is a high pressure cleaning with the gun is desired, the air supply is through a ball valve Boiler system shut off and the pressure at the pump increased.
  • a needle valve can only be used to open or close the water supply serve or also by an additional pressure difference switch start the high pressure pump.
  • the boiler pump control is done by a proximity switch without Touch switches or through a micro pressure switch that coupled the boiler system as well as high pressure pump in or out Operation continues. There is also the possibility of depending to switch the pump and boiler system separately from the needle valve. Since the trigger lever the needle valve and the proximity or If the pressure switch is actuated, the pump and boiler system become the same Time switched.
  • the necessary lines are connected to the Cables of the control block together in a cable strand Control unit led into the system.
  • the control block is one encapsulated waterproof control unit that regulates the Air pressure and the amount of abrasive via a control line Facility enables.
  • the more or less regulation can by individual switches or push buttons as well as toggle switches respectively.
  • the switching point can be on the left and right of the Gun be arranged or lie on one side.
  • the switching point (s) is (are) protected from damage or unwanted by a sliding hinged or sash cover Switch protected.
  • the within the vortex jet gun according to the invention trained water strand results from Fig. 2.
  • the with the reference numeral 1 and 2 marked water supply can be as shown or through a flexible hose take place, which led to the connector 3 is.
  • Numeral 4 is a conventional needle valve marked from the high pressure water technology.
  • the Reference number 5 denotes a connecting piece.
  • the Reference numerals 5 and 6 denote intermediate lines that can be replaced by flexible hose lines.
  • the reference numerals 8 to 17 identify a changeover valve with a ball 16. By turning the axis 12 the ball 16 raised or lowered and optionally gives the Passage to the swirl nozzle (in Fig. 1 "outlet nozzle") or the flushing pipe (in Fig.1 "water jet nozzle”) free or blocks him.
  • the valve can be a needle valve with the same function be.
  • the reference symbol 18 denotes an end pipe.
  • the Reference number 19 denotes a screw-in jet nozzle with the desired spray pattern, for example a point flat
  • the vortex nozzle preferably provided for the invention results from Fig. 3 with the partial figures 3a to 3d, of 3a a perspective view, FIG. 3b a Show side view.
  • the reference number 3 denotes a screwable point nozzle with continuous thread for Screw connection or with O-ring for quick connection.
  • the reference number 4 denotes a welded threaded tube for the nozzle function.
  • the reference number 5 denotes a centerpiece with two internal thread points, which is essentially wear-free.
  • the reference number 7 indicates an outlet nozzle with training according to the invention as a mixing chamber part insert, which is a wearing part is.
  • the blasting gun works via a remote control cable that goes into the Supply line is integrated to feed the components Gas (generally air), blasting media (granules) and Regulate liquid (generally water).
  • Gas generally air
  • blasting media granules
  • Regulate liquid generally water
  • the control block acts on the changeover valve around this to put in one of three positions. In one of these End positions, all valve outlets are blocked, it finds no liquid application. Dry comes out of the outlet nozzle Blasting agent-gas mixture, unless the supply this mixture to the blasting gun by means of the control block is also blocked. In one of the other two of the three end positions of the changeover valve the liquid supply to the water jet nozzle to get out of this to emerge as a washing or rinsing jet.
  • the liquid becomes the other two of the three end positions fed to the mixing chamber integrated in the outlet nozzle, in which the mixture used for spraying Gas, abrasive and liquid is processed.
  • the type of admixture tangential to the flow direction of the abrasive gas mixture is the Inlet pipe for the blasting agent-gas mixture through the central piece passed through to something from the jet nozzle housing to protrude into the enclosed mixing chamber.
  • the inlet pipe and the concentrically surrounding central part there is an annular space of small width, in the oblique that of the changeover valve in its corresponding position liquid inlet port opens in such a way that the liquid in the longitudinal direction of the annulus with an axial directional component and with a circumferential directional component to be led.
  • the hollow liquid jet which is subject to swirl, becomes the axially flowing abrasive gas mixture assigned, surrounds it like a coat and tears it in Limits in the circumferential direction (in addition to the axial movement) with, so that the mixture of abrasive, gas and liquid does not impact vertically on a surface to be cleaned, but moved across the surface as a high-energy film becomes efficient and gentle on the dirt from of the surface.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)

Abstract

The gun has a manually operated control block integrated into it which regulates the feed of constituents to the gun. The control block also controls a reversing valve in order to convey, in one end position, the liquid into a mixer chamber integrated in the outlet nozzle for radiation material, gas and liquid. The constituents are mixed with a granulate-gas mixture. The liquid is added to the granulate-gas mixture at a tangent to the flow direction of the granulate-gas mixture. The jet emerging from the nozzle flows both axially and radially along the flow's longitudinal axis, or is conveyed directly by the reversing valve in the other end position into a liquid-radiation nozzle by which the jet of liquid has no gas and granulate component.

Description

Die vorliegende Erfindung bezieht sich auf eine Strahlpistole gemäß dem Gattungsbegriff des Anspruchs 1.The present invention relates to a blasting gun according to the preamble of claim 1.

Bei derartigen bekannten Strahlpistolen ist es üblich, daß eine Person die Strahlpistole betätigt in der Weise, daß die Anteile von Granulat bzw. Strahlmittel , Wasser und Luft sowie die Richtung des aus diesen Komponenten gebildeten Arbeitsstrahls bestimmt werden, während eine zweite Person die Zuführung der Komponenten des Arbeitsstrahles zu der Strahlpistole bestimmt. Es ist also nur ein Zweipersonenbetrieb möglich. Außerdem sind mehrere Verschleißteile vorhanden, die einzeln ausgewechselt werden müssen, was ebenfalls als Betriebserschwernis gesehen werden muß.In such known jet guns, it is common for a Person actuates the blasting gun in such a way that the proportions of granules or abrasives, water and air as well as the direction of the working beam formed from these components be while a second person is feeding the Components of the working beam to the blasting gun are determined. It So only two-person operation is possible. Also are several wearing parts available, which were replaced individually must be seen, which is also seen as an operational difficulty must become.

Diese Nachteile zu vermeiden, ist Aufgabe der vorliegenden Erfindung und die Erfindung zeigt demzufolge eine Strahlpistole auf, die insbesondere im Rahmen einer Anlage eingesetzt werden kann, wie sie Gegenstand von DE 196 23 024.1 ist, sodaß die vorliegende Erfindung als Ausbildung eines wesentlichen Teiles der älteren Erfindung gesehen werden kann.The object of the present invention is to avoid these disadvantages and the invention accordingly shows a blasting gun, which can be used especially in the context of a plant, as is the subject of DE 196 23 024.1, so that the present Invention as the formation of an essential part of the older Invention can be seen.

Die vorliegende Erfindung ergibt sich aus der nachfolgenden Beschreibung der Zeichnung und den Ansprüchen. In der Zeichnung zeigen

Fig. 1
die Gesamtheit der Strahlpistole,
Fig. 2
den Wasserstrang der Strahlpistole gemäß Fig. 1 und
Fig. 3
eine bevorzugte Wirbeldüse für die Strahlpistole gemäß Fig. 1.
The present invention results from the following description of the drawing and the claims. Show in the drawing
Fig. 1
the entirety of the blasting gun,
Fig. 2
the water strand of the blasting gun according to FIG. 1 and
Fig. 3
a preferred swirl nozzle for the blasting gun according to FIG. 1.

Der Aufbau der Wirbelstrahlpistole, die die erfindungsgemäße Strahlpistole bevorzugt sein soll, weist folgende Komponenten auf.

Die Zuführung
des Granulat-Luftgemisches in die Wirbeldüse,
die Zuführung
des Wassers über ein Nadelventil zum Umschaltventil und entweder in die Wirbeldüse oder in das Nachspühlrohr und
die Zuführung
einer 12 V Leitung zum Steuerblock zur Fernsteuerung und zur Bestimmung des Förderluftdruckes und der Strahlmittelmenge, die Ein- Aus- Schaltung vom Kesseldruck für die Förderluft, sowie zur Steuerung einer pneumatischen Wasserhochdruckpumpe.
The structure of the vortex jet gun, which the jet gun according to the invention is to be preferred, has the following components.
The feeder
the granulate-air mixture into the vortex nozzle,
the feeder
the water via a needle valve to the changeover valve and either into the swirl nozzle or into the rinse tube and
the feeder
a 12 V cable to the control block for remote control and for determining the conveying air pressure and the amount of abrasive, switching the boiler pressure on and off for the conveying air, as well as for controlling a pneumatic high pressure pump.

Die Gesamtheit der erfindungsgemäßen Strahlpistole ergibt sich aus Fig. 1.The entirety of the blasting gun according to the invention results from Fig. 1.

Ein Strahlschlauch ist bis zum Zentralstück geführt und mit einer Verbindungsschelle am Einlaßrohr festgehalten. Das Einlaßrohr ist an der Verbindungsstelle mit dem Strahlschlauch mit einem Wulst ausgebildet, um dessen Abrutschen zu verhindern. Das Einlaßrohr ist im Mittelteil mit einem Gewinde versehen, das die Verbindung zum Zentralstück ermöglicht. Das Zentralstück mit Auslaßdüse und Aufnahmerohr weist zwei innenliegende Gewindestellen zur Verbindung mit der Düsengesamtheit auf, wobei die Verbindung auch mit Schnellverschlüssen möglich ist. Die Auslaßdüse hat eine Düsenform, wie sie noch zu beschreiben sein wird.A blasting hose is led to the center piece and with one Connection clamp held on the inlet pipe. The inlet pipe is at the junction with the blasting hose with a bead trained to prevent it from slipping. The inlet pipe is provided with a thread in the middle part that connects to the centerpiece. The center piece with outlet nozzle and Pick-up tube has two internal thread points for connection with the nozzle assembly, the connection also with Quick closures is possible. The outlet nozzle has a nozzle shape, how it will be described.

Die Wasserstrahldüse kann im Grunde genommen beliebig austauschbar sein, wenn sie nur den gewünschten Spüleffekt ergibt. Als Umschaltventil ist ein Kugel-Nadel oder Schiebe-Ventil möglich. Bei der Grundausstattung des Ventils wird das Wasser in das Zentralstück der Strahldüseneinheit eingeleitet und der Weg zum Spülrohr freigegeben. Die Bohrungen der Spüldüsen sind relativ groß` sodaß durch den erhöhten Wasserdurchlaß der Druck abfällt. Ein Druckdifferenzschalter schaltet die Kesselanlage ab und nur die Wasserpumpe läuft. Ist eine Hochdruckreinigung mit der Pistole erwünsdcht, wird durch ein Kugelhahnventil die Luftzufuhr zur Kesselanlage abgesperrt und der Druck an der Pumpe erhöht.The water jet nozzle can basically be replaced as desired if it only gives the desired rinsing effect. As Switching valve is a ball needle or slide valve possible. With the basic equipment of the valve, the water is in the Center piece of the jet nozzle unit initiated and the way to Rinsing pipe released. The holes in the flushing nozzles are relative large` so that the pressure drops due to the increased water passage. A pressure difference switch switches the boiler system off and only the water pump is running. Is a high pressure cleaning with the gun is desired, the air supply is through a ball valve Boiler system shut off and the pressure at the pump increased.

Ein Nadelventil kann nur zum Öffnen oder Schließen der Wasserzufuhr dienen oder aber auch durch einen zusätzlichen Druckdifferenzschalter die Hochdruckpumpe in Betrieb setzen. Die KesselPumpenschaltung erfolgt durch einen Annäherungsschalter, der ohne Berührung schaltet oder durch einen Mikrodruckschalter, der gekoppelt die Kesselanlage sowie Hochdruckpumpe in oder außer Betrieb setzt. Weiter besteht die Möglichkeit, in Abhängigkeit vom Nadelventil die Pumpe und Kesselanlage getrennt zu schalten. Da der Abzugshebel das Nadelventil sowie den Annäherungs- oder Druckschalter betätigt, werden Pumpe und Kesselanlage zur gleichen Zeit geschaltet. Die notwendigen Leitungen werden mit den Kabeln des Steuerblockes gemeinsam in einen Kabel strang zur Steuereinheit in die Anlage geführt. Der Steuerblock ist eine vergossene wasserdichte Steuereinheit, die die Regelung des Luftdruckes und der Strahlmittelmenge über eine Steuerleitung zur Anlage ermöglicht. Die Mehr- oder Minder-Regelung kann durch einzelne Schalter oder Druckknöpfe sowie durch Kippschalter erfolgen. Die Schaltstelle kann links und rechts an der Pistole angeordnet sein oder aber auch an einer Seite liegen. Die Schaltstelle(n) wird (werden) durch einen SchiebeKlapp- oder Schrappdeckel vor Beschädigung oder ungewolltes Schalten geschützt.A needle valve can only be used to open or close the water supply serve or also by an additional pressure difference switch start the high pressure pump. The boiler pump control is done by a proximity switch without Touch switches or through a micro pressure switch that coupled the boiler system as well as high pressure pump in or out Operation continues. There is also the possibility of depending to switch the pump and boiler system separately from the needle valve. Since the trigger lever the needle valve and the proximity or If the pressure switch is actuated, the pump and boiler system become the same Time switched. The necessary lines are connected to the Cables of the control block together in a cable strand Control unit led into the system. The control block is one encapsulated waterproof control unit that regulates the Air pressure and the amount of abrasive via a control line Facility enables. The more or less regulation can by individual switches or push buttons as well as toggle switches respectively. The switching point can be on the left and right of the Gun be arranged or lie on one side. The switching point (s) is (are) protected from damage or unwanted by a sliding hinged or sash cover Switch protected.

Der innerhalb der erfindungsgemäßen Wirbelstrahlpistole ausgebildete Wasserstrang ergibt sich aus Fig. 2. Die mit dem Bezugszeichen 1 und 2 gekennzeichnete Wasserzuleitung kann wie dargestellt oder durch eine flexible Schlauchleitung erfolgen, die an das Verbindungsstück 3 herangeführt ist. Mit dem Bezugszeichen 4 ist ein herkömmliches Nadelventil aus der Wasserhochdrucktechnik gekennzeichnet. Das Bezugszeichen 5 kennzeichnet ein Verbindungsstuck. Die Bezugszeichen 5 und 6 kennzeichnen Zwischenleitungen, die durch flexible Schlauchleitungen ersetzt werden können. Die Bezugszeichen 8 bis 17 kennzeichnen ein Umschaltventil mit einer Kugel 16. Durch Verdrehen der Achse 12 wird die Kugel 16 gehoben oder gesenkt und gibt wahlweise den Durchgang zur Wirbeldüse (in Fig. 1 "Auslaßdüse") oder dem Spülrohr (in Fig.1 "Wasserstrahldüse") frei oder sperrt ihn. Das Ventil kann ein Nadelventil mit gleicher Funktion sein. Das Bezugszeichen 18 kennzeichnet ein Endrohr. Das Bezugszeichen 19 kennzeichnet eine einschraubbare Strahldüse mit gewünschtem Strahlbild, beispielsweise ein PunktFlach- oder Kegelstrahlbild.The within the vortex jet gun according to the invention trained water strand results from Fig. 2. The with the reference numeral 1 and 2 marked water supply can be as shown or through a flexible hose take place, which led to the connector 3 is. Numeral 4 is a conventional needle valve marked from the high pressure water technology. The Reference number 5 denotes a connecting piece. The Reference numerals 5 and 6 denote intermediate lines that can be replaced by flexible hose lines. The reference numerals 8 to 17 identify a changeover valve with a ball 16. By turning the axis 12 the ball 16 raised or lowered and optionally gives the Passage to the swirl nozzle (in Fig. 1 "outlet nozzle") or the flushing pipe (in Fig.1 "water jet nozzle") free or blocks him. The valve can be a needle valve with the same function be. The reference symbol 18 denotes an end pipe. The Reference number 19 denotes a screw-in jet nozzle with the desired spray pattern, for example a point flat or cone spray pattern.

Die für die Erfindung vorzugsweise vorgesehene Wirbeldüse ergibt sich aus Fig. 3 mit den Teilfiguren 3a bis 3d, von denen Fig. 3a eine perspektivische Ansicht, Fig. 3b eine Seitenansicht darstellen. Das Bezugszeichen 3 kennzeichnet eine schraubbare Punktdüse mit durchgehendem Gewinde für Schraubverbindung oder mit O-Ring für Schnellverbindung. Das Bezugszeichen 4 kennzeichnet ein eingeschweißtes Gewinderohr für die Düsenfunktion. Das Bezugszeichen 5 kennzeichnet ein Zentralstück mit zwei Innengewindestellen, das im wesentlichen verschleißfrei ist. Das Bezugszeichen 7 kennzeichnet eine Auslaßdüse mit erfindungsgemäßer Ausbildung als Mischkammerteileinsatz, der ein Verschleißteil ist.The vortex nozzle preferably provided for the invention results from Fig. 3 with the partial figures 3a to 3d, of 3a a perspective view, FIG. 3b a Show side view. The reference number 3 denotes a screwable point nozzle with continuous thread for Screw connection or with O-ring for quick connection. The reference number 4 denotes a welded threaded tube for the nozzle function. The reference number 5 denotes a centerpiece with two internal thread points, which is essentially wear-free. The reference number 7 indicates an outlet nozzle with training according to the invention as a mixing chamber part insert, which is a wearing part is.

Der Steuerblock gemäß Fig. 1 ist in die Strahlpistole integriert und wirkt über ein Fernbedienungskabel, das in die Zuleitung integriert ist, um die Zuführung der Komponenten Gas (im allgemeinen Luft), Strahlmittel (Granulat) und Flüssigkeit (im allgemeinen Wasser) zu regeln. Andererseits wirkt der Steuerblock auf das Umschaltventil, um dieses in eine von drei Stellungen zu bringen. In der einen dieser Endstellungen sind alle Ventilauslässe gesperrt, es findet keine Flüssigkeit Anwendung. Aus der Auslaßdüse tritt trockenes Strahlmittel-Gasgemisch aus, sofern nicht die Zufuhr dieses Gemisches zu der Strahlpistole mittels des Steuerblockes ebenfalls gesperrt ist. In einer der beiden anderen der drei Endstellungen des Umschaltventiles erfolgt die Flüssigkeitszufuhr zur Wasserstrahldüse, um aus dieser als Wasch- oder Spülstrahl auszutreten. In der anderen der beiden anderen der drei Endstellungen wird die Flüssigkeit der in die Auslaßdüse integrierten Mischkammer zugeleitet, in der das zum Sprühen zum Einsatz kommende Gemisch aus Gas, Strahlmittel und Flüssigkeit aufbereitet wird. Wichtig ist dabei die Art der Zumischung tangential zur Strömungsrichtung des Strahlmittel-Gasgemisches. Hierzu ist das Einlaßrohr für das Strahlmittel-Gasgemisch durch das Zentral-stück hindurchgeführt, um etwas in die vom Strahldüsengehäuse umschlossene Mischkammer hineinzuragen. Zwischen dem Einlaßrohr und dem dieses konzentrisch umgebenden Zentralstück befindet sich ein Ringraum geringer Weite, in den schräg der vom Umschaltventil bei dessen entsprechender Stellung mit Flüssigkeit versorgte Einlaßstutzen mündet derart, daß die Flüssigkeit in der Längsrichtung des Ringraumes mit einer axialen Richtungskomponenten und mit einer Umfangsrichtungskomponenten geführt wird. Am Ende des Ringraumes und des in der selben Querschnittsebene liegende Ende Einlaßrohres wird der mit Drall behaftete hohle Flüssigkeitsstrahl dem axial strömenden Strahlmittel-Gasgemisch zugeordnet, umgibt diesen mantelartig und reißt ihn in Grenzen in Umfangsrichtung (zusätzlich zur Axialbewegung) mit, sodaß das Gemisch aus Strahlmittel, Gas und Flüssigkeit nicht senkrecht auf eine zu reinigende Oberfläche aufprallt, sondern über die Fläche als energiereicher Film bewegt wird und dabei effizient aber schonend den Schmutz von der Fläche ablöst.1 is integrated into the blasting gun and works via a remote control cable that goes into the Supply line is integrated to feed the components Gas (generally air), blasting media (granules) and Regulate liquid (generally water). On the other hand the control block acts on the changeover valve around this to put in one of three positions. In one of these End positions, all valve outlets are blocked, it finds no liquid application. Dry comes out of the outlet nozzle Blasting agent-gas mixture, unless the supply this mixture to the blasting gun by means of the control block is also blocked. In one of the other two of the three end positions of the changeover valve the liquid supply to the water jet nozzle to get out of this to emerge as a washing or rinsing jet. In the other the liquid becomes the other two of the three end positions fed to the mixing chamber integrated in the outlet nozzle, in which the mixture used for spraying Gas, abrasive and liquid is processed. Important is the type of admixture tangential to the flow direction of the abrasive gas mixture. This is the Inlet pipe for the blasting agent-gas mixture through the central piece passed through to something from the jet nozzle housing to protrude into the enclosed mixing chamber. Between the inlet pipe and the concentrically surrounding central part there is an annular space of small width, in the oblique that of the changeover valve in its corresponding position liquid inlet port opens in such a way that the liquid in the longitudinal direction of the annulus with an axial directional component and with a circumferential directional component to be led. At the end of the annulus and that lying in the same cross-sectional plane At the end of the inlet tube, the hollow liquid jet, which is subject to swirl, becomes the axially flowing abrasive gas mixture assigned, surrounds it like a coat and tears it in Limits in the circumferential direction (in addition to the axial movement) with, so that the mixture of abrasive, gas and liquid does not impact vertically on a surface to be cleaned, but moved across the surface as a high-energy film becomes efficient and gentle on the dirt from of the surface.

Claims (1)

Strahlpistole für die Naßstrahlung mit Zuführung eines Strahlmittel-Gasgemisches als einer Strahlkomponenten und separater Zuführung von Flüssigkeit als anderer Strahlkomponenten in die Strahlpistole, um nach Zuordnung beider Komponenten zueinander als Sprühstrahl zum Einsatz zu kommen, gekennzeichnet durch einen in die Strahlpistole integrierten, manuell zu betätigenden Steuerblock, der einerseits die Komponentenzufuhr zu der Strahlpistole regelt, andererseits auf ein Umschaltventil einwirkt, um mittels dieses Umschaltventils entweder in dessen einen Endstellung die Flüssigkeit in eine in die Auslaßdüse für Strahlgut, Gas und Flüssigkeit integrierte Mischkammer gelangen zu lassen, worin deren Zumischung zum Granulat-Gasgemisch und die Aufbereitung als Arbeitsstrahl aus Gas, Flüssigkeit und Granulat in der Weise erfolgt, daß die Zumischung der Flüssigkeit zum Granulat-Gasgemisch tangential zur Strömungsrichtung des Granulat-Gasgemisches erfolgt, sodaß der Arbeitsstrahl beim Austritt aus der Düse sowohl eine axiale Strömungskomponente als auch eine Rotationskomponente um seine Strömungslängsachse hat, oder mittels des Umschaltventiles in dessen anderen Endstellung die Flüssigkeit direkt in eine Flüssigkeitsstrahldüse gelangen zu lassen, mittels der der Flüssigkeitsstrahl ohne Gas- und Granulatkomponente zum Einsatz kommt.Blasting gun for wet blasting with the supply of a blasting agent-gas mixture as a blasting component and separate feeding of liquid as other blasting components into the blasting gun in order to be used as a spray jet after the two components have been assigned to one another, characterized by a manually operated control block integrated into the blasting gun which, on the one hand, regulates the supply of components to the blasting gun, on the other hand acts on a changeover valve in order to use this changeover valve either to let the liquid, in its one end position, get into a mixing chamber integrated into the outlet nozzle for blasting material, gas and liquid, Gas mixture and the preparation as a working jet of gas, liquid and granulate is carried out in such a way that the liquid is mixed into the granular gas mixture tangentially to the direction of flow of the granular gas mixture, so that the working jet has an axial flow component as well as a rotational component around its longitudinal axis of flow when it emerges from the nozzle, or by means of the changeover valve in its other end position it allows the liquid to go directly into a liquid jet nozzle, by means of which the liquid jet is used without gas and granulate components.
EP97123037A 1996-12-31 1997-12-31 Blast gun for wet blasting Expired - Lifetime EP0850727B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19654779A DE19654779A1 (en) 1996-12-31 1996-12-31 Blasting gun for wet radiation
DE19654779 1996-12-31

Publications (3)

Publication Number Publication Date
EP0850727A2 true EP0850727A2 (en) 1998-07-01
EP0850727A3 EP0850727A3 (en) 1998-11-11
EP0850727B1 EP0850727B1 (en) 2002-11-27

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ID=7816437

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97123037A Expired - Lifetime EP0850727B1 (en) 1996-12-31 1997-12-31 Blast gun for wet blasting

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EP (1) EP0850727B1 (en)
AT (1) ATE228417T1 (en)
DE (2) DE19654779A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005057115A1 (en) * 2005-11-28 2007-05-31 Alfred Kärcher Gmbh & Co. Kg Unit for selective release of compressed air or mixture of compressed air and dry ice for dry-ice blasting device, has second switching element which can be actuated independent of first switching element

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3858358A (en) * 1973-01-02 1975-01-07 American Aero Ind High pressure liquid and abrasive cleaning apparatus
DE8801677U1 (en) * 1988-02-10 1988-05-11 Bauer, Josef, 2000 Hamburg Wet blasting device
US4821467A (en) * 1986-06-06 1989-04-18 Whitemetal Inc. Control system for liquid propelled abrasive cleaning
US5024029A (en) * 1988-10-04 1991-06-18 Stripping Technologies Inc. Abrasive media valve system
WO1994027785A1 (en) * 1993-05-26 1994-12-08 Carolina Equipment And Supply Company, Inc. Method and apparatus for cleaning with high pressure liquids at low flow rates
FR2709257A1 (en) * 1993-08-23 1995-03-03 Viel Jean Pierre Method for cleaning a building by very low pressure
DE29607056U1 (en) * 1996-04-18 1996-07-18 Gries, Josef, 82008 Unterhaching Device for supplying a blasting gun with working media

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
US3828478A (en) * 1973-06-25 1974-08-13 E Bemis Fluid-jet-abrasive device and system
US4057940A (en) * 1976-12-02 1977-11-15 Otto Wemmer Control for sand blasting nozzle
DE8327903U1 (en) * 1983-09-29 1984-03-22 Keizers, geb. Kalle, Sigrid, 4280 Borken SPRAY PIPE FOR A HIGH PRESSURE HEATER
US5216848A (en) * 1988-10-04 1993-06-08 Stripping Technologies Inc. Dual controls for an abrasive blast system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3858358A (en) * 1973-01-02 1975-01-07 American Aero Ind High pressure liquid and abrasive cleaning apparatus
US4821467A (en) * 1986-06-06 1989-04-18 Whitemetal Inc. Control system for liquid propelled abrasive cleaning
DE8801677U1 (en) * 1988-02-10 1988-05-11 Bauer, Josef, 2000 Hamburg Wet blasting device
US5024029A (en) * 1988-10-04 1991-06-18 Stripping Technologies Inc. Abrasive media valve system
WO1994027785A1 (en) * 1993-05-26 1994-12-08 Carolina Equipment And Supply Company, Inc. Method and apparatus for cleaning with high pressure liquids at low flow rates
FR2709257A1 (en) * 1993-08-23 1995-03-03 Viel Jean Pierre Method for cleaning a building by very low pressure
DE29607056U1 (en) * 1996-04-18 1996-07-18 Gries, Josef, 82008 Unterhaching Device for supplying a blasting gun with working media

Also Published As

Publication number Publication date
EP0850727A3 (en) 1998-11-11
ATE228417T1 (en) 2002-12-15
EP0850727B1 (en) 2002-11-27
DE19654779A1 (en) 1998-07-02
DE59708818D1 (en) 2003-01-09

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