EP0124768B1 - High pressure fluid system - Google Patents

High pressure fluid system Download PDF

Info

Publication number
EP0124768B1
EP0124768B1 EP19840103711 EP84103711A EP0124768B1 EP 0124768 B1 EP0124768 B1 EP 0124768B1 EP 19840103711 EP19840103711 EP 19840103711 EP 84103711 A EP84103711 A EP 84103711A EP 0124768 B1 EP0124768 B1 EP 0124768B1
Authority
EP
European Patent Office
Prior art keywords
pressure
installation according
valve
switch
adjusting means
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.)
Expired
Application number
EP19840103711
Other languages
German (de)
French (fr)
Other versions
EP0124768A2 (en
EP0124768A3 (en
Inventor
Hans-Dieter Even
Bodo Missmahl
Karl-Heinz Redmers
Hubertus Rembe
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.)
Woma Apparatebau Wolfgang Maasberg and Co GmbH
Original Assignee
Woma Apparatebau Wolfgang Maasberg and Co GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Woma Apparatebau Wolfgang Maasberg and Co GmbH filed Critical Woma Apparatebau Wolfgang Maasberg and Co GmbH
Publication of EP0124768A2 publication Critical patent/EP0124768A2/en
Publication of EP0124768A3 publication Critical patent/EP0124768A3/en
Application granted granted Critical
Publication of EP0124768B1 publication Critical patent/EP0124768B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/026—Cleaning by making use of hand-held spray guns; Fluid preparations therefor
    • B08B3/028—Spray guns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/002—Manually-actuated controlling means, e.g. push buttons, levers or triggers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/01—Spray pistols, discharge devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/026—Cleaning by making use of hand-held spray guns; Fluid preparations therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2230/00—Other cleaning aspects applicable to all B08B range
    • B08B2230/01—Cleaning with steam
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2559—Self-controlled branched flow systems
    • Y10T137/2574—Bypass or relief controlled by main line fluid condition
    • Y10T137/2605—Pressure responsive
    • Y10T137/264—Electrical control

Definitions

  • the invention relates to a high-pressure liquid system for cleaning with a hydraulic fluid generator to which a spray device is connected, wherein a valve between the hydraulic fluid generator and the spray device can be opened and closed remotely by a switch, around the liquid of the spray device or the area of the suction side of the hydraulic fluid generator feed.
  • German utility model 74 01 818 which describes a cleaning device that works with liquid or steam and has a pistol-like dispensing device for the liquid or steam.
  • a valve In order to avoid the recoil that occurs when the on and off valve provided in the dispensing device is closed, a valve must be actuated that blocks the liquid supply to the dispensing device and returns the liquid to the pump. This additional valve can be actuated from the dispenser via an electrical switch.
  • High-pressure water jet cleaning systems which are equipped with a spray gun or a rotating nozzle bar, however, often require considerable physical strength of the operator when using maximum pressure, so that maximum pressure should only be used for a short time.
  • maximum pressure is often only necessary in the case of very strong adherence of dirt or the like. The operator should therefore be able to work with a medium pressure, but switch to maximum pressure for a short time and finally be able to rinse and wash away the dirt particles at a low pressure level, especially since this also entails considerable energy savings and reduced water consumption would be.
  • the object of the invention is therefore to provide a high-pressure liquid system of the type mentioned at the outset, which offers the operator a convenient possibility of adjusting the working pressure.
  • valve is designed as an adjustable pressure relief valve and is remotely actuated in pressure or continuously adjustable in pressure by electrical actuators arranged on the spray device or in its area.
  • the pressure limiting valve which can be designed in particular as an overflow valve, can be pneumatically, electromotively or hydraulically adjustable, the adjusting force acting in particular on a spring device (mechanical or pneumatic) of this valve.
  • presettable pressure levels of a relatively small number for example three
  • an essentially continuous pressure adjustment can also be carried out, for example, by means of a stepping motor which is actuated via a corresponding electrical actuator.
  • a throttle is suitable, for example, for a pneumatic or hydraulic adjustment of the pressure relief valve, but a regulator may be used for electromotive adjustment in order to achieve a jerk-free pressure adjustment.
  • a spray gun, a nozzle bar or the like, as used for example for ablative cleaning on ship walls or the like, can be used as the spraying device.
  • a hydraulic fluid generator 10 in the form of a high-pressure pump conveys water from a tank 12 to a pressure relief valve 14 designed as an overflow valve, which also serves as a safety valve here.
  • the water supplied by the high-pressure pump 10 and under maximum pump pressure is divided by the pressure relief valve 14 into two branch flows, the first of which is fed as working medium into a high-pressure hose 16, while the second flows back into the tank 12 via a return line 18.
  • an air compressor 20 feeds air into a line 22 which leads to (in the exemplary embodiment shown) three reducing valves 24, 26 and 28.
  • Each reducing valve 24, 26, 28 is assigned a manometer 30.
  • the reducing valves 24, 26, 28 are connected to the input of an electromagnetic switching valve 34, 36 and 38, respectively.
  • the arrangement is such that only one of the switching valves 34, 36 or 38 can be brought into the open position.
  • the outputs of all switching valves 34, 36, 38 are combined on a line 32 and lead via a throttle element as a delay device 40 to the pneumatic control input of the pressure relief valve 14.
  • a line 44, 46 and 48 is assigned to each switching valve, which allow the switching valves 34, 36, 38 to be actuated by means of control pulses.
  • the lines 44, 46, 48 are connected to actuators with a blasting gun as a spray device 42. (If necessary, the signal can also be transmitted wirelessly.)
  • Fig. 2 shows a gun 42 serving as a spraying device with a handle 42a and a connecting piece 42b for a nozzle pipe 42c, a high-pressure liquid connection 49 for the high-pressure hose 16 (FIG. 1) and a trigger lever 51 for the trigger switch 50.
  • the trigger lever 51 is of one Protection and support bracket 43 surrounded.
  • connection piece 60 on the gun 42 for the electrical voltage and for a connecting cable to the light-emitting diodes 52, 54, 55 and the actuators 56, 58 designed as switches and the trigger switch 50 in the interior of the gun housing.
  • the trigger switch 50 which is actuated by the trigger lever 51, serves to release the pressure medium. It only releases the pressure medium when the actuator 56 is pressed in once and the operational readiness is indicated by the diode 52 lighting up.
  • the control element 58 which is a pushbutton with a switching mechanism consisting of three steps, is pressed, one of the three provided pressure stages comes into operation due to the fact that the control element 58 acts on the switching valves 34, 36, 38. This is indicated at the same time by lighting up one or two light-emitting diodes 54, 55 assigned to each pressure stage.
  • a requirement for the operation of the gun 42 is a signal from the pump control system that the high-pressure pump 10 is running. If the pistol 42 is ready for operation, an actuation of the actuator 56 designed as a pushbutton on the pistol 42 can give a pulse to a toggle relay (not shown) connected downstream, so that all functions of the pistol 42 are activated. The shutdown is also carried out by a pulse to be triggered on the actuator 56.
  • the operating state of the activated gun 42 is displayed on the light-emitting diode 52 (for example red).
  • the smallest pressure level is selected in parallel with the first command on the actuator 56. This is indicated by the lighting of the light-emitting diode 54 (for example yellow). If a higher pressure level is required, the three-step switching mechanism of the actuator 58 can be switched on in accordance with the desired pressure level by briefly giving a command on the actuator 58 with the trigger lever 51 relieved and thus with the trigger switch 50 switched off.
  • the selected pressure level is indicated by the lighting of the light-emitting diodes 54, 55, the lowest pressure level light-emitting diode 54, the medium pressure level light-emitting diode 55 and the highest pressure level light-emitting diodes 54, 55 together.
  • the high-pressure water can now be switched on or off and actuated and / or returned to the suction side of the high-pressure pump 10 by actuating the trigger lever 51 and thus the trigger switch 50 in accordance with the preselected pressure level. A change in the pressure levels when the trigger lever 51 is actuated is not possible. To shut down the trigger lever 51 is relieved and then the actuator 56 is actuated, so that the LED 52 goes out and the gun 42 is now secured against unintentional activation of the high pressure water.

Landscapes

  • Nozzles (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Description

Die Erfindung betrifft eine Hochdruckflüssigkeitsanlage zum Reinigen mit einem Druckflüssigkeitserzeuger, an den eine Spritzeinrichtung angeschlossen ist, wobei ein Ventil zwischen dem Druckflüssigkeitserzeuger und der Spritzeinrichtung durch einen Schalter fernbetätigt geöffnet und geschlossen werden kann, um die Flüssigkeit der Spritzeinrichtung bzw. dem Bereich der Saugseite des Druckflüssigkeitserzeugers zuzuführen.The invention relates to a high-pressure liquid system for cleaning with a hydraulic fluid generator to which a spray device is connected, wherein a valve between the hydraulic fluid generator and the spray device can be opened and closed remotely by a switch, around the liquid of the spray device or the area of the suction side of the hydraulic fluid generator feed.

Eine derartige Anlage ist aus dem deutschen Gebrauchsmuster 74 01 818 bekannt, das ein Reinigungsgerät beschreibt, das mit Flüssigkeit oder Dampf arbeitet und eine pistolenartige Abgabeeinrichtung für die Flüssigkeit oder den Dampf aufweist. Hierbei ist zum Vermeiden des beim Schließen des An- und Abschaltventils, das in der Abgabeeinrichtung vorgesehen ist, auftretenden Rückstoßes ein Ventil zu betätigen, das die Flüssigkeitszufuhr zur Abgabeeinrichtung sperrt und die Flüssigkeit wieder zur Pumpe zurückleitet. Dieses zusätzliche Ventil kann von der Abgabeeinrichtung her über einen elektrischen Schalter betätigt werden.Such a system is known from German utility model 74 01 818, which describes a cleaning device that works with liquid or steam and has a pistol-like dispensing device for the liquid or steam. In order to avoid the recoil that occurs when the on and off valve provided in the dispensing device is closed, a valve must be actuated that blocks the liquid supply to the dispensing device and returns the liquid to the pump. This additional valve can be actuated from the dispenser via an electrical switch.

Hochdruckwasserstrahlreinigungsanlagen, die mit einer Spritzpistole oder einem Drehdüsenbalken versehen sind, erfordern aber bei Höchstdruckeinsatz häufig erhebliche Körperkräfte der Bedienungsperson, so daß nur kurzfristig mit Höchstdruck gearbeitet werden sollte. Andererseits ist Höchstdruck oft auch nur bei sehr starken Anhaftungen von Schmutz o. dgl. erforderlich. Die Bedienungsperson sollte daher in die Lage versetzt werden, auch mit einem mittleren Druck zu arbeiten, aber kurzfristig auf Höchstdruck übergehen und schließlich mit einer niedrigsten Druckstufe ein Abspülen und Wegspülen der Schmutzteilchen vornehmen zu können, zumal hiermit auch eine erhebliche Energieeinsparung und ein verringerter Wasserverbrauch verbunden wären.High-pressure water jet cleaning systems, which are equipped with a spray gun or a rotating nozzle bar, however, often require considerable physical strength of the operator when using maximum pressure, so that maximum pressure should only be used for a short time. On the other hand, maximum pressure is often only necessary in the case of very strong adherence of dirt or the like. The operator should therefore be able to work with a medium pressure, but switch to maximum pressure for a short time and finally be able to rinse and wash away the dirt particles at a low pressure level, especially since this also entails considerable energy savings and reduced water consumption would be.

Aufgabe der Erfindung ist es daher, eine Hochdruckflüssigkeitsanlage der eingangs genannten Art zu schaffen, die eine für die Bedienungsperson bequeme Einstellmöglichkeit für den Arbeitsdruck bietet.The object of the invention is therefore to provide a high-pressure liquid system of the type mentioned at the outset, which offers the operator a convenient possibility of adjusting the working pressure.

Diese Aufgabe wird dadurch gelöst, daß das Ventil als einstellbares Druckbegrenzungsventil ausgebildet und von an der Spritzeinrichtung oder in deren Bereich angeordneten elektrischen Stellorganen fernbetätigt im Druck in Stufen oder kontinuierlich verstellbar ist.This object is achieved in that the valve is designed as an adjustable pressure relief valve and is remotely actuated in pressure or continuously adjustable in pressure by electrical actuators arranged on the spray device or in its area.

Hierdurch wird eine bequeme, an der Spritzeinrichtung vornehmbare Druckeinstellmöglichkeit geschaffen, die ein vorteilhaftes Arbeiten bei unterschiedlichen Drücken unter entsprechender Energie- und Wassereinsparung ermöglicht. Ggfs. kann eine Verzögerungseinrichtung zur ruckfreien Druckverstellung dem Ventil zugeordnet sein. Diese dient hierbei als Sicherheitsmaßnahme, um Druckstöße auszuschalten, die insbesondere bei Umschaltung auf Höchstdruck gefährlich sein könnten, sowie um eine lange Lebensdauer zu gewährleisten.This creates a convenient pressure adjustment option which can be carried out on the spraying device and which enables advantageous working at different pressures with corresponding energy and water savings. If necessary. a delay device for jerk-free pressure adjustment can be assigned to the valve. This serves as a safety measure to eliminate pressure surges that could be dangerous, especially when switching to maximum pressure, and to ensure a long service life.

Das Druckbegrenzungsventil, das insbesondere als Überströmventil ausgebildet sein kann, kann pneumatisch, elektromotorisch oder hydraulisch verstellbar sein, wobei die Verstellkraft insbesondere auf eine Federeinrichtung (mechanisch oder pneumatisch) dieses Ventils einwirkt.The pressure limiting valve, which can be designed in particular as an overflow valve, can be pneumatically, electromotively or hydraulically adjustable, the adjusting force acting in particular on a spring device (mechanical or pneumatic) of this valve.

Für viele Anwendungsfälle kommt man mit voreinstellbaren Druckstufen einer relativ geringen Anzahl (beispielsweise drei) aus, zwischen denen durch Betätigung der Stellorgane wählbar ist. Jedoch kann auch eine im wesentlichen kontinuierliche Druckverstellung etwa mittels eines Schrittschaltmotors erfolgen, der über ein entsprechendes elektrisches Stellorgan betätigt wird.For many applications, presettable pressure levels of a relatively small number (for example three) can be used, between which the actuators can be selected. However, an essentially continuous pressure adjustment can also be carried out, for example, by means of a stepping motor which is actuated via a corresponding electrical actuator.

Als Verzögerungseinrichtung eignet sich beispielsweise bei pneumatischer oder hydraulischer Verstellung des Druckbegrenzungsventils eine Drossel, bei elektromotorischer Verstellung ist dagegen ggfs. ein Regler zu verwenden, um eine ruckfreie Druckverstellung zu erzielen.A throttle is suitable, for example, for a pneumatic or hydraulic adjustment of the pressure relief valve, but a regulator may be used for electromotive adjustment in order to achieve a jerk-free pressure adjustment.

Als Spritzeinrichtung kann beispielsweise eine Strahlpistole, ein Düsenbalken o.dgl., wie sie beispielsweise zum abtragenden Reinigen bei Schiffswänden o. dgl. verwendet werden, eingesetzt werden.A spray gun, a nozzle bar or the like, as used for example for ablative cleaning on ship walls or the like, can be used as the spraying device.

Weitere Ausgestaltungen der Erfindung sind der nachfolgenden Beschreibung und den Unteransprüchen zu entnehmen.Further embodiments of the invention can be found in the following description and the subclaims.

Die Erfindung wird nachstehend anhand des in den beigefügten Abbildungen dargestellten Ausführungsbeispiels näher erläutert.

  • Fig. 1 zeigt schematisch eine Anlage mit pneumatischer Steuereinrichtung.
  • Fig. 2 zeigt teilweise im Schnitt eine Spritzeinrichtung in Form einer Pistole für die Anlage von Fig. 1.
The invention is explained below with reference to the embodiment shown in the accompanying figures.
  • Fig. 1 shows schematically a system with a pneumatic control device.
  • FIG. 2 shows a spray device in the form of a gun, partly in section, for the system from FIG. 1.

Ein Druckflüssigkeitserzeuger 10 in Form einer Hochdruckpumpe fördert Wasser aus einem Tank 12 zu einem als Überströmventil ausgeführten Druckbegrenzungsventil 14, das hier auch als Sicherheitsventil dient. Das von der Hochdruckpumpe 10 gelieferte, unter maximalem Pumpendruck stehende Wasser wird durch das Druckbegrenzungsventil 14 in zwei Zweigströme aufgeteilt, von denen der erste als Arbeitsmittel in einen Hochdruckschlauch 16 eingespeist wird, während der zweite über eine Rücklaufleitung 18 in den Tank 12 zurückfließt.A hydraulic fluid generator 10 in the form of a high-pressure pump conveys water from a tank 12 to a pressure relief valve 14 designed as an overflow valve, which also serves as a safety valve here. The water supplied by the high-pressure pump 10 and under maximum pump pressure is divided by the pressure relief valve 14 into two branch flows, the first of which is fed as working medium into a high-pressure hose 16, while the second flows back into the tank 12 via a return line 18.

Dies wird gesteuert durch eine pneumatisch ansteuerbare Feder 14a des Druckbegrenzungsventils 14, wobei der pneumatische Druck entsprechend einer vorgegebenen Funktion den hydraulischen Arbeitsmitteldruck beeinflußt; im einfachsten Falle liegt eine lineare Verknüpfung vor.This is controlled by a pneumatically controllable spring 14a of the pressure relief valve 14, the pneumatic pressure influencing the hydraulic working fluid pressure in accordance with a predetermined function; in the simplest case there is a linear link.

Um den pneumatischen Steuerdruck zu erzeugen, fördert ein Luftkompressor 20 Luft in eine Leitung 22, die zu (im dargestellten Ausführungsbeispiel) drei Reduzierventilen 24, 26 und 28 führt. Jedem Reduzierventil 24, 26, 28 ist ein Manometer 30 zugeordnet. Ausgangsseitig sind die Reduzierventile 24, 26, 28 mit dem Eingang je eines elektromagnetischen Schaltventils 34, 36 bzw. 38 verbunde. Die Anordnung ist dabei so getroffen, daß immer nur eines der Schaltventile 34, 36 oder 38 in Offenstellung bringbar ist. Die Ausgänge aller Schaltventile 34, 36, 38 sind auf einer Leitung 32 zusammengefaßt und führen über ein Drosselorgan als Verzögerungseinrichtung 40 zum pneumatischen Steuereingang des Druckbegrenzungsventils 14.In order to generate the pneumatic control pressure, an air compressor 20 feeds air into a line 22 which leads to (in the exemplary embodiment shown) three reducing valves 24, 26 and 28. Each reducing valve 24, 26, 28 is assigned a manometer 30. On the output side, the reducing valves 24, 26, 28 are connected to the input of an electromagnetic switching valve 34, 36 and 38, respectively. The arrangement is such that only one of the switching valves 34, 36 or 38 can be brought into the open position. The outputs of all switching valves 34, 36, 38 are combined on a line 32 and lead via a throttle element as a delay device 40 to the pneumatic control input of the pressure relief valve 14.

Jedem Schaltventil ist eine Leitung 44,46 bzw. 48 zugeordnet, die mittels Steuerimpulsen die Schaltventile 34, 36, 38, zu betätigen gestatten. Die Leitungen 44, 46, 48 sind mit Stellorganen mit einer Strahlpistole als Spritzeinrichtung 42 verbunden. (Ggfs. kann die Signalübertragung auch drahtlos erfolgen.)A line 44, 46 and 48 is assigned to each switching valve, which allow the switching valves 34, 36, 38 to be actuated by means of control pulses. The lines 44, 46, 48 are connected to actuators with a blasting gun as a spray device 42. (If necessary, the signal can also be transmitted wirelessly.)

Fig. 2 zeigt eine als Spritzeinrichtung dienende Pistole 42 mit einem Handgriff 42a und einem Anschlußstutzen 42b für ein Düsenrohr 42c, einem Hochdruckflüssigkeitsanschluß 49 für den Hochdruckschlauch 16 (Fig. 1) sowie einem Abzugshebel 51 für den Auslöseschalter 50. Der Abzugshebel 51 ist von einem Schutz- und Abstützbügel 43 umgeben. Weiterhin befindet sich an der Pistole 42 ein Anschlußstutzen 60 für die elektrische Spannung und für ein Verbindungskabel zu den Leuchtdioden 52, 54, 55 und den als Schalter ausgebildeten Stellorganen 56, 58 und dem Auslöseschalter 50 im Inneren des Pistolengehäuses.Fig. 2 shows a gun 42 serving as a spraying device with a handle 42a and a connecting piece 42b for a nozzle pipe 42c, a high-pressure liquid connection 49 for the high-pressure hose 16 (FIG. 1) and a trigger lever 51 for the trigger switch 50. The trigger lever 51 is of one Protection and support bracket 43 surrounded. Furthermore, there is a connection piece 60 on the gun 42 for the electrical voltage and for a connecting cable to the light-emitting diodes 52, 54, 55 and the actuators 56, 58 designed as switches and the trigger switch 50 in the interior of the gun housing.

Der Auslöseschalter 50, der von dem Abzugshebel 51 betätigt wird, dient zur Druckmittelfreigabe. Er gibt das Druckmittel erst dann frei, wenn das Stellorgan 56 einmal eingedrückt und damit die Betriebsbereitschaft durch das Aufleuchten der Diode 52 angezeigt ist. Je nachdem, wie oft das Stellorgan 58, das ein Drucktaster mit einem aus drei Schritten bestehenden Schaltwerk ist, gedrückt wird, kommt dadurch, daß das Stellorgan 58 auf die Schaltventile 34, 36, 38 einwirkt, eine der drei vorgesehenen Druckstufen in Funktion. Dies wird zugleich durch Aufleuchten einer oder zweier, jeder Druckstufe zugeordneter Leuchtdiode(n) 54, 55 angezeigt.The trigger switch 50, which is actuated by the trigger lever 51, serves to release the pressure medium. It only releases the pressure medium when the actuator 56 is pressed in once and the operational readiness is indicated by the diode 52 lighting up. Depending on how often the control element 58, which is a pushbutton with a switching mechanism consisting of three steps, is pressed, one of the three provided pressure stages comes into operation due to the fact that the control element 58 acts on the switching valves 34, 36, 38. This is indicated at the same time by lighting up one or two light-emitting diodes 54, 55 assigned to each pressure stage.

Voraussetzung für den Betrieb der Pistole 42 ist ein Signal aus der Pumpensteuerung, daß die Hochdruckpumpe 10 läuft. Ist die Pistole 42 betriebsbereit, kann durch Betätigung des als Drucktaster ausgebildeten Stellorgans 56 an der Pistole 42 ein Impuls an ein (nicht dargestelltes) nachgeschaltetes Kipprelais gegeben werden, so daß alle Funktionen der Pistole 42 aktiviert sind. Die Abschaltung erfolgt ebenfalls durch einen am Stellorgan 56 auszulösenden Impuls.A requirement for the operation of the gun 42 is a signal from the pump control system that the high-pressure pump 10 is running. If the pistol 42 is ready for operation, an actuation of the actuator 56 designed as a pushbutton on the pistol 42 can give a pulse to a toggle relay (not shown) connected downstream, so that all functions of the pistol 42 are activated. The shutdown is also carried out by a pulse to be triggered on the actuator 56.

Der Betriebszustand der aktivieren Pistole 42 wird an der aufleuchtenden Leuchtdiode 52 (beispielweise rot) angezeigt. Parallel mit dem Erstbefehl am Stellorgan 56 wird die kleinste Druckstufe ausgewält. Dies wird durch das Aufleuchten der Leuchtdiode 54 (beispielsweise gelb) angezeigt. Ist eine höhere Druckstufe erforderlich, so ist durch kurze Befehlsgabe am Stellorgan 58 bei gleichzeitig entlastetem Abzugshebel 51 und damit bei ausgeschaltetem Auslöseschalter 50 das aus drei Schritten bestehende Schaltwerk des Stellorgans 58 entsprechend der gewünschten Druckstufe weiterzuschalten. Die angewählte Druckstufe wird durch das Aufleuchten der Leuchtdioden 54, 55 angezeigt, niedrigste Druckstufe Leuchtdiode 54, mittlere Druckstufe Leuchtdiode 55 und höchste Druckstufe Leuchtdioden 54, 55 zusammen. Das Hochdruckwasser kann jetzt durch Betätigen des Abzugshebels 51 und damit des Auslöseschalters 50 entsprechend der vorgewählten Druckstufe zu- oder abgeschaltet und damit verspritzt und/oder zur Saugseite der Hochdruckpumpe 10 zurückgeführt werden. Eine Änderung der Druckstufen bei betätigtem Abzughebel 51 ist nicht möglich. Zum Außerbetriebsetzen wird der Abzughebel 51 entlastet und danach das Stellorgan 56 betätigt, so daß die Leuchtdiode 52 erlischt und die Pistole 42 nunmehr gegen unbeabsichtigtes Zuschalten des Hochdruckwassers gesichert ist.The operating state of the activated gun 42 is displayed on the light-emitting diode 52 (for example red). The smallest pressure level is selected in parallel with the first command on the actuator 56. This is indicated by the lighting of the light-emitting diode 54 (for example yellow). If a higher pressure level is required, the three-step switching mechanism of the actuator 58 can be switched on in accordance with the desired pressure level by briefly giving a command on the actuator 58 with the trigger lever 51 relieved and thus with the trigger switch 50 switched off. The selected pressure level is indicated by the lighting of the light-emitting diodes 54, 55, the lowest pressure level light-emitting diode 54, the medium pressure level light-emitting diode 55 and the highest pressure level light-emitting diodes 54, 55 together. The high-pressure water can now be switched on or off and actuated and / or returned to the suction side of the high-pressure pump 10 by actuating the trigger lever 51 and thus the trigger switch 50 in accordance with the preselected pressure level. A change in the pressure levels when the trigger lever 51 is actuated is not possible. To shut down the trigger lever 51 is relieved and then the actuator 56 is actuated, so that the LED 52 goes out and the gun 42 is now secured against unintentional activation of the high pressure water.

Der Übergang von einem Arbeitsdruck zum nächsten erfolgt weich, da das einstellbare Drosselorgan 40 nur allmählich die Änderungen des pneumatischen Steuerdrucks am Überströmventil 14 zur Wirkung kommen läßt.The transition from one working pressure to the next takes place smoothly, since the adjustable throttle element 40 allows the changes in the pneumatic control pressure at the overflow valve 14 to take effect only gradually.

Es versteht sich, daß die üblichen Sicherheitsventile, Rückschlagventile usw. vorgesehen sind, die aber der Übersichtlichkeit wegen hier nicht mit dargestellt sind.It is understood that the usual safety valves, check valves etc. are provided, but are not shown here for the sake of clarity.

Claims (16)

1. A high-pressure liquid cleaning installation, comprising a (10) pressure liquid generator (10), to which a spray device (42) is connected, a valve (14) between the pressure fluid generator (10) and the spray device (42) being adapted to remote-control opening and closing by means of a switch to feed the liquid to the spray device (42) or to the area of the intake side of the pressure liquid generetor (10), characterised in that the valve (14) is constructed as an adjustable pressure limiting valve and is adjustable in respect of pressure in stages or continuously by remote control by electrical adjusting means (56, 58) disposed on the spray device (42) or in the area thereof.
2. An installation according to claim 1, characterised in that a delay device (40) is associated with the valve (14) for smooth pressure adjustment.
3. An installation according to claim 1 or 2, characterised in that the valve (14) is biased by a spring force adjustable by a control device (20 to 38).
4. An installation according to any one of claims 1 to 3, characterised in that pressure stages corresponding to the required pressure head and selectable by actuation of the adjusting means (56, 58) are pre-settable by means of a control device (20 to 38).
5. An installation according to any one of claims 1 to 4, characterised in that the pressure adjustment can be carried out in accordance with a predetermined, more particularly linear, function between the pressure and the force acting on the pressure limiting valve (14).
6. An installation according to any one of claims 1 to 5, characterised in that an additional triggering switch (50) is connected in series with the electrical adjusting means (56, 58) to form a two-hand safety feature.
7. An installation according to any one of claims 4 to 6, characterised in that the pressure stages can be introduced with a time delay.
8. An installation according to any one of claims 2 to 7, characterised in that the time delay device is a choke (40).
9. An installation according to any one of claims 3 to 8, characterised in that the control device is an air compressor (20) having a pneumatic control block (22 to 40), the latter comprising parallel-connected reduction valves (24, 26, 28) for pre-setting pressure stages end each reduction valve (24, 26, 28) is followed by a control valve (34, 36, 38) adapted to be actuated by an associated switch on the spray device (42).
10. An installation according to any one of claims 1 to 9, characterised in that an optical display (52, 54, 55) is provided on the spray device (42).
11. An installation according to claim 10, characterised in that the display consists of LED's (52, 54, 55).
12. An installation according to claim 11, characterised in that the lowest pressure stage is adapted to be switched on by means of an adjusting means (56) also serving as a make switch on the spray device (42) and each of the higher pressure stages has associated with it an adjusting means (58) constructed as a switch each having its associated LEDs (54, 55).
13. An installation according to claim 12, characterised in that the control valves (36, 38) following the adjusting means (58) for the higher pressure stages can be brought into break positions by switching off the adjusting means (56).
14. An installation according to any one of claims 1 to 13, characterised in that a switch (58) used as an adjusting means in the form of a pushbutton has a plurality of switch positions by means of each of which a control valve (34, 36, 38) of another pressure stage is adapted to be actuated.
15. An installation according to any one of claims 1 to 14, characterised in that the spray device (42) has a trigger (51) which actuates a triggering switch (50), return of the trigger (51) to its inoperative position maintaining the preselected pressure stage.
16. An installation according to any one of claims 1 to 15, characterised in that the adjustment means (56, 58) are locked against actuation when the triggering switch (50) is in the make position.
EP19840103711 1983-04-13 1984-04-04 High pressure fluid system Expired EP0124768B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833313249 DE3313249A1 (en) 1983-04-13 1983-04-13 HIGH PRESSURE WATER JET SYSTEM
DE3313249 1983-04-13

Publications (3)

Publication Number Publication Date
EP0124768A2 EP0124768A2 (en) 1984-11-14
EP0124768A3 EP0124768A3 (en) 1986-02-19
EP0124768B1 true EP0124768B1 (en) 1988-02-24

Family

ID=6196191

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840103711 Expired EP0124768B1 (en) 1983-04-13 1984-04-04 High pressure fluid system

Country Status (4)

Country Link
US (1) US4585168A (en)
EP (1) EP0124768B1 (en)
JP (1) JPS59206068A (en)
DE (2) DE3313249A1 (en)

Families Citing this family (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4932592A (en) * 1988-10-04 1990-06-12 Stripping Technologies Inc. Pressurized hose handle with reverse grip
US5216848A (en) * 1988-10-04 1993-06-08 Stripping Technologies Inc. Dual controls for an abrasive blast system
US4926589A (en) * 1988-10-04 1990-05-22 Stripping Technologies Inc. Pressurized hose handle with system controls
US4901928A (en) * 1988-10-04 1990-02-20 Stripping Technologies Inc. Pressure hose handle and system
GB2248890A (en) * 1990-08-22 1992-04-22 Shaun Waddingham Pneumatic trigger control of a pump
GB2247161A (en) * 1990-08-22 1992-02-26 Shaun Waddingham Electrical trigger control of water jet
GB2252134A (en) * 1990-08-22 1992-07-29 Shaun Waddingham Hydraulic trigger control of a pump.
GB2249591B (en) * 1990-10-01 1994-01-26 Pressure Pointing Ltd Mortar dispensing apparatus
US5279448A (en) * 1992-02-18 1994-01-18 Hanlin Michael O Installable and centralized self-contained appliance-like fluid dispensing system
DE9300831U1 (en) * 1993-01-22 1993-04-22 WAP Reinigungssysteme GmbH & Co, 7919 Bellenberg Pressure-suction distributor of a high-pressure cleaning device with additional control valve
US5522761A (en) * 1994-07-21 1996-06-04 Lessard; Michael A. Radial grip remote control for abrasive blast machines
US6113007A (en) * 1994-08-26 2000-09-05 Turtle Wax, Inc. Automated vehicle washing systems using concentrated detergents
US6105204A (en) * 1996-10-15 2000-08-22 Scharwat; Frank E. Surface tracking jet cleaning device
DE10029375B4 (en) 2000-06-20 2004-04-29 Hammelmann Maschinenfabrik Gmbh Control device for a high pressure cleaning device
DE10031857A1 (en) * 2000-06-30 2002-01-17 Sata Farbspritztechnik spray gun
DE10131644A1 (en) * 2001-06-29 2003-01-16 Kaercher Gmbh & Co Alfred High pressure water cleaner output gun has a simple pressure indication display based on an electrical pressure transducer and an optical display so that no mechanical moving parts are required
DE10135104C1 (en) * 2001-07-19 2002-09-12 Sata Farbspritztechnik Paint spray gun has a link between the piston drilling and a pressure measurement chamber in the pistol grip, to give a display of the compressed air pressure level
US7717354B1 (en) 2004-08-02 2010-05-18 Kaivac, Inc. Cleaning system including operator-wearable components
DE102005028116A1 (en) * 2005-06-13 2006-12-14 Alfred Kärcher Gmbh & Co. Kg Method for controlling a cleaning device and cleaning device for carrying out the method
EP1930084B1 (en) 2006-12-05 2009-06-03 SATA GmbH & Co. KG Vent for the gravity cup of a paint spray gun
DE202007005381U1 (en) * 2007-04-12 2008-08-14 J. Wagner Gmbh spray gun
US9327301B2 (en) 2008-03-12 2016-05-03 Jeffrey D. Fox Disposable spray gun cartridge
DE202008014389U1 (en) * 2008-10-29 2010-04-08 Sata Gmbh & Co. Kg Gravity cup for a paint spray gun
DE102009032399A1 (en) 2009-07-08 2011-01-13 Sata Gmbh & Co. Kg Spray Gun
GB201007244D0 (en) * 2010-04-30 2010-06-16 Biochemica Uk Ltd Cleaning cooling towers
DE202010007355U1 (en) 2010-05-28 2011-10-20 Sata Gmbh & Co. Kg Nozzle head for a spraying device
US9333519B2 (en) 2010-12-02 2016-05-10 Sata Gmbh & Co. Kg Spray gun and accessories
ES2855001T5 (en) 2011-06-30 2024-02-23 Sata Gmbh & Co Kg Easy to clean spray gun, accessory for it, assembly and disassembly procedure
WO2014034041A2 (en) * 2012-08-31 2014-03-06 Hitachi Koki Co., Ltd. Cleaning machine
CA155474S (en) 2013-09-27 2015-08-27 Sata Gmbh & Co Kg Spray gun
US10130962B2 (en) * 2013-10-10 2018-11-20 Briggs & Stratton Corporation Wirelessly controlled trigger start and chemical tank change-over for pressure washers
DE202013105779U1 (en) 2013-12-18 2015-03-19 Sata Gmbh & Co. Kg Air nozzle termination for a paint spray gun
CN110560285B (en) 2014-07-31 2021-05-18 萨塔有限两合公司 Spray gun and method for manufacturing same
CA159961S (en) 2014-07-31 2015-07-17 Sata Gmbh & Co Kg Spray gun
USD758537S1 (en) 2014-07-31 2016-06-07 Sata Gmbh & Co. Kg Paint spray gun rear portion
EP2985083A1 (en) * 2014-08-15 2016-02-17 Nilfisk-Advance A/S High pressure cleaner with adjustable pressure or flow level
USD768820S1 (en) 2014-09-03 2016-10-11 Sata Gmbh & Co. Kg Paint spray gun with pattern
AU2015371732B2 (en) * 2014-12-23 2021-02-25 Alfred Kärcher Gmbh & Co. Kg High-pressure cleaning device
DE102015006484A1 (en) 2015-05-22 2016-11-24 Sata Gmbh & Co. Kg Nozzle arrangement for a spray gun, in particular paint spray gun and spray gun, in particular paint spray gun
DE102015016474A1 (en) 2015-12-21 2017-06-22 Sata Gmbh & Co. Kg Air cap and nozzle assembly for a spray gun and spray gun
CN205966208U (en) 2016-08-19 2017-02-22 萨塔有限两合公司 Hood subassembly and spray gun
CN205995666U (en) 2016-08-19 2017-03-08 萨塔有限两合公司 Spray gun and its trigger
DE102016116797A1 (en) * 2016-09-08 2018-03-08 Hammelmann GmbH Apparatus and method for cleaning the surface of a tool
DE102018118737A1 (en) 2018-08-01 2020-02-06 Sata Gmbh & Co. Kg Nozzle for a spray gun, nozzle set for a spray gun, spray guns and method for producing a nozzle for a spray gun
DE102018118738A1 (en) 2018-08-01 2020-02-06 Sata Gmbh & Co. Kg Base body for a spray gun, spray guns, spray gun set, method for producing a base body for a spray gun and method for converting a spray gun
WO2018184636A2 (en) 2018-08-01 2018-10-11 Sata Gmbh & Co. Kg Set of nozzles for a spray gun, spray gun system, method for embodying a nozzle module, method for seelcting a nozzle module from a set of nozzles for a paint job, selection system and computer program product

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7401818U (en) * 1974-04-18 Kraenzle J Handle tube for high-performance cleaning devices
US2641508A (en) * 1949-02-24 1953-06-09 United Aircraft Prod Controls for steam-water cleaning apparatus
US3058668A (en) * 1960-10-07 1962-10-16 Oren B Harmes Cleaning apparatus
US3147767A (en) * 1962-06-22 1964-09-08 John B Goss Hydraulic cleaning apparatus
US3140049A (en) * 1962-11-28 1964-07-07 Britt Tech Corp Cleaning apparatus with relief control valve
US3246845A (en) * 1964-06-11 1966-04-19 L & A Products Inc Controls for high velocity washing equipment
US3298386A (en) * 1964-06-15 1967-01-17 Rexall Drug Chemical System for establishing a plurality of fluid pressure levels
US3253790A (en) * 1964-11-19 1966-05-31 C H Heist Ohio Corp Safety control
US3383044A (en) * 1965-08-09 1968-05-14 Britt Tech Corp Hydraulically controlled pressure washer
US3375980A (en) * 1966-07-21 1968-04-02 Hydro Services Inc Water blast control system
US3626968A (en) * 1970-09-08 1971-12-14 Twin Disc Inc Pressure rise delay valve
US3690558A (en) * 1971-02-05 1972-09-12 Federal Screw Works Hydraulic cleaning device
US3760982A (en) * 1971-02-24 1973-09-25 Aero Wash Systems Inc Pressure wash control system
DE7240741U (en) * 1972-11-07 1973-03-22 Haas W & Sohn Spray devices such as spray guns and the like with a release shut-off
US3885739A (en) * 1974-01-02 1975-05-27 Phillip E Tuttle Pressure fluid cleaning device
US4047665A (en) * 1975-11-14 1977-09-13 Moynihan William N Spray control system
DE2724283B2 (en) * 1977-05-28 1979-08-16 Frank'sche Eisenwerke Ag, 6340 Dillenburg Spraying device for cleaning equipment, plant protection equipment, etc.
DE2804844C3 (en) * 1978-02-04 1981-01-22 Woma-Apparatebau Wolfgang Maasberg & Co Gmbh, 4100 Duisburg Spray gun, in particular high pressure spray gun
DE2813090A1 (en) * 1978-03-25 1979-10-11 Woma Maasberg Co Gmbh W SHUT-OFF VALVE FOR HIGH AND HIGHEST PRESSURES, IN PARTICULAR FOR SPRAY GUNS
DE2841018C2 (en) * 1978-09-21 1986-02-20 Guido 7919 Bellenberg Oberdorfer High pressure cleaning device
FR2437548A1 (en) * 1978-09-29 1980-04-25 Renault PRESSURE REGULATION VALVE WITH 3 OR 4 LEVELS
US4349154A (en) * 1979-11-01 1982-09-14 Butterworth, Inc. Power assisted dump valve
DE3034769C2 (en) * 1980-09-15 1985-03-21 Guido 7919 Bellenberg Oberdorfer Device for cleaning objects using a spray gun

Also Published As

Publication number Publication date
DE3313249A1 (en) 1984-10-25
JPS59206068A (en) 1984-11-21
EP0124768A2 (en) 1984-11-14
EP0124768A3 (en) 1986-02-19
US4585168A (en) 1986-04-29
DE3469413D1 (en) 1988-03-31

Similar Documents

Publication Publication Date Title
EP0124768B1 (en) High pressure fluid system
DE2703349B2 (en) Valve device for controlling a reciprocating piston for upward travel in an elevator car
DE3037259C2 (en) Device for pressure limitation with self-holding for a liquid delivery device
DE3936155A1 (en) Water jet cleaning pump control - has control valve that responds to pressure limit signal to shut off pump
EP0666792B1 (en) Pressure controlling and/or regulating device for a fluid medium, in particular air or gas
DE3818068C2 (en)
EP0685301A1 (en) Hydraulic percussive device with infinitely variable number of impacts and impact energy
EP1854558A2 (en) Valve assembly
DE1928855A1 (en) Lifting device, especially for paint spray systems
DE20116921U1 (en) Electro-hydraulic motor pump unit, add-on element and pressure relief valve
DE19535691C1 (en) Hydraulically driven hand tool
EP1629156A1 (en) Hydraulic control arrangement
EP1886732A1 (en) Valve assembly with reduced actuation force
EP2047108B1 (en) Soft start valve device
DE19521051C2 (en) High pressure water jet processing device
EP0341530A1 (en) Control device for pneumatic systems, in particular pneumatic cylinders for machines and production machines or production assemblies
DE10014045B4 (en) Water Supply
EP0115073B1 (en) Switching and control device for hydraulic or pneumatic equipments
DE1263432B (en) Pressure medium operated valve especially for gas turbine systems
DE3537337C2 (en)
DE3336258A1 (en) Injection or compression mould for processing plastics materials
DE202013104109U1 (en) Hydraulic tool and hydraulically actuated tool holder
DE647572C (en) Compressed air drive for electrical switches with a safety device
DE10217037B4 (en) Safety control device
DE4136149A1 (en) Zero position monitoring of hydraulically controlled machines - involves operating valve connected to hydraulic switch valve working against spring force and with at least one pressure connection and two work connections

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): DE GB IT

17P Request for examination filed

Effective date: 19860626

17Q First examination report despatched

Effective date: 19870205

D17Q First examination report despatched (deleted)
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE GB IT

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3469413

Country of ref document: DE

Date of ref document: 19880331

ITF It: translation for a ep patent filed

Owner name: STUDIO TORTA SOCIETA' SEMPLICE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19890424

Year of fee payment: 6

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19890430

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19900404

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19910101