EP0124768A2 - High pressure fluid system - Google Patents

High pressure fluid system Download PDF

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Publication number
EP0124768A2
EP0124768A2 EP19840103711 EP84103711A EP0124768A2 EP 0124768 A2 EP0124768 A2 EP 0124768A2 EP 19840103711 EP19840103711 EP 19840103711 EP 84103711 A EP84103711 A EP 84103711A EP 0124768 A2 EP0124768 A2 EP 0124768A2
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EP
European Patent Office
Prior art keywords
pressure
switch
valve
plant according
spray device
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
EP19840103711
Other languages
German (de)
French (fr)
Other versions
EP0124768B1 (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
Woma Apparatebau GmbH
Original Assignee
Woma Apparatebau Wolfgang Maasberg and Co GmbH
Woma Apparatebau GmbH
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Application filed by Woma Apparatebau Wolfgang Maasberg and Co GmbH, Woma Apparatebau 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

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    • 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 according to the preamble of claim 1.
  • 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 occurring when the on and off valve provided in the dispensing device is closed, a valve must be actuated which 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 that are equipped with a spray gun or a rotating nozzle bar, however, require maximum pressure often considerable physical strength of the operator, so that work should only be carried out at maximum pressure for a short time.
  • maximum pressure is often only necessary in the case of very strong dirt or the like. The operator should therefore be able to work with a medium pressure, but switch briefly to maximum pressure and finally be able to rinse and flush away the dirt particles with a lowest 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 according to the preamble of claim 1, which offers a convenient setting for the operator for the working pressure.
  • the remotely operable valve is designed as an adjustable pressure relief valve and can be remotely adjusted in pressure by electrical actuators arranged on the spraying device or in its area, with a delay device for jerk-free pressure adjustment possibly being assigned to the pressure relief valve.
  • the delay device serves as a safety measure to switch off pressure surges that could be dangerous, especially when switching to maximum pressure, and to ensure a long service life.
  • 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 can be used, between which can be selected by actuating the actuators.
  • an essentially continuous pressure adjustment for example by means of a. Stepper motor, which is actuated by a corresponding electrical actuator.
  • a throttle is suitable as a delay device, for example in the case of pneumatic or hydraulic adjustment of the pressure limiting valve.
  • an electromotive adjustment may be necessary to use a regulator to achieve a smooth 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 high-pressure pump 10 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, which is under maximum 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 delivers air into a line 22 which leads to (in the exemplary embodiment shown) three reducing valves 24, 26 and 28.
  • a pressure gauge 30 is assigned to each reducing valve 24, 26, 28.
  • the reducing valves 24, 26 28 are connected to the input of one 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 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 44, 46, 48 to be actuated by means of control pulses.
  • the lines 44, 46, 48 are connected to actuators with a blasting gun 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 and a trigger lever 51 for the trigger switch 50.
  • the trigger lever 51 is from a protective and support bracket 43 surround.
  • a connection piece 60 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 printing medium. He 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 45, 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 pistol 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 diode 54, 55 together.
  • the high-pressure water can now be switched on or off by actuating the trigger lever 51 and thus the trigger switch 50 in accordance with the preselected pressure stage and thus sprayed and / or returned to the suction side of the high-pressure pump 10. A change in the pressure levels when the trigger lever 51 is actuated is not possible. To shut down the trigger 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 switching on of the high pressure water.

Abstract

Die Erfindung betrifft eine Hochdruckflüssigkeitsanlage mit einem Druckwassererzeuger (10), an den eine Spritzeinrichtung (42) angeschlossen ist, wobei ein einstellbares Druckbegrenzungsventil (14) zwischen dem Druckwassererzeuger (10) und der Spritzeinrichtung (42) angeordnet ist. Das Druckbegrenzungsventil (14) ist durch elektrische Signale, die von elektrishen Stellorganen (56, 58) erzeugbar sind, fernbetätigt im Druck einstellbar, wobei eine Verzögerungseinrichtung (40) zur ruckfreien Druckverstellung vorgesehen sein kann.The invention relates to a high-pressure liquid system with a pressurized water generator (10) to which a spray device (42) is connected, an adjustable pressure relief valve (14) being arranged between the pressurized water generator (10) and the spray device (42). The pressure-limiting valve (14) can be adjusted remotely in pressure by means of electrical signals which can be generated by electrical actuators (56, 58), and a delay device (40) can be provided for jerk-free pressure adjustment.

Description

Die Erfindung betrifft eine Hochdruckflüssigkeitsanlage nach dem Oberbegriff des Anspruchs 1.The invention relates to a high-pressure liquid system according to the preamble of claim 1.

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 Abgabeeinriehtung 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 occurring when the on and off valve provided in the dispensing device is closed, a valve must be actuated which 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 that are equipped with a spray gun or a rotating nozzle bar, however, require maximum pressure often considerable physical strength of the operator, so that work should only be carried out at maximum pressure for a short time. On the other hand, maximum pressure is often only necessary in the case of very strong dirt or the like. The operator should therefore be able to work with a medium pressure, but switch briefly to maximum pressure and finally be able to rinse and flush away the dirt particles with a lowest pressure level, especially since this also entails considerable energy savings and reduced water consumption would be.

Aufgabe der Erfindung ist es daher, eine Hochdruckflüssigkeitsanlage nach dem Oberbegriff des Anspruchs 1 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 according to the preamble of claim 1, which offers a convenient setting for the operator for the working pressure.

Diese Aufgabe wird dadurch gelöst, daß das fernbetätigbare Ventil als einstellbares Druckbegrenzungsventil ausgebildet und von an der Spritzeinrichtung oder in deren Bereich angeordneten elektrischen Stellorganen fernbetätigt im Druck einstellbar ist, wobei ggfs. eine verzögerungseinrichtung zur ruckfreien Druckverstellung dem Druckbegrenzungsventil zugeordnet ist. Hierdurch wird eine bequeme, an der Spritzeinrichtung vornehmbare Druckeinstellmöglichkeit geschaffen, die ein vorteilhaftes Arbeiten bei unterschiedlichen Drücken unter entsprechender Energie- und Wassereinsparung ermöglicht. Die verzögerungseinrichtung dient hierbei als Sicherheitsmaßnahme, um Druckstoße auszuschalten, die insbesondere bei Umschaltung auf Höchstdruck gefährlich sein könnten, sowie um eine lange Lebensdauer zu gewährleisten.This object is achieved in that the remotely operable valve is designed as an adjustable pressure relief valve and can be remotely adjusted in pressure by electrical actuators arranged on the spraying device or in its area, with a delay device for jerk-free pressure adjustment possibly being assigned to the pressure relief valve. 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. The delay device serves as a safety measure to switch off 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 3) 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 (e.g. 3) can be used, between which can be selected by actuating the actuators. However, an essentially continuous pressure adjustment, for example by means of a. Stepper motor, which is actuated by 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 as a delay device, for example in the case of pneumatic or hydraulic adjustment of the pressure limiting valve. on the other hand, an electromotive adjustment may be necessary to use a regulator to achieve a smooth 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 pistol for the system from FIG. 1, partly in section.

Eine Hochdruckpumpe 10 fördert Wasser aus einem Tank 12 zu einem als Überströmventil ausgeführten Druckbegrenzungsventil 14, das hier auch als Sicherheitsventil dient. Das von der Hochdruckpurrpe 10 gelieferte, unter maximalem Punpendruck 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 high-pressure pump 10 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, which is under maximum 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 verbunden. 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 40 zum pneumatischen Steuereingang des Druckbegrenzungsventils 14.In order to generate the pneumatic control pressure, an air compressor 20 delivers air into a line 22 which leads to (in the exemplary embodiment shown) three reducing valves 24, 26 and 28. A pressure gauge 30 is assigned to each reducing valve 24, 26, 28. On the output side, the reducing valves 24, 26 28 are connected to the input of one 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 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 44, 46, 48 zu betätigen gestatten. Die Leitungen 44, 46, 48 sind mit Stellorganen mit einer Strahlpistole 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 44, 46, 48 to be actuated by means of control pulses. The lines 44, 46, 48 are connected to actuators with a blasting gun 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 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 unddem Auslöseschalter 50 im Inneren des Pistolengehäuses.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 and a trigger lever 51 for the trigger switch 50. The trigger lever 51 is from a protective and support bracket 43 surround. Furthermore, on the gun 42 there is a connection piece 60 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 Drucktnittelfreigabe. 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) 45, 55 angezeigt.The trigger switch 50, which is actuated by the trigger lever 51, serves to release the printing medium. He 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 45, 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 aktivierten Pistole 42 wird an der aufleuchtenden Leuchtdiode 52 (beispielsweise rot) angezeigt. Parallel mit dem Erstbefehl am Stellorgan 56 wird die kleinste Druckstufe ausgewählt. 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 Leuchtdiode 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 Saugseiite 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 pistol 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 diode 54, 55 together. The high-pressure water can now be switched on or off by actuating the trigger lever 51 and thus the trigger switch 50 in accordance with the preselected pressure stage and thus sprayed and / or returned to the suction side of the high-pressure pump 10. A change in the pressure levels when the trigger lever 51 is actuated is not possible. To shut down the trigger 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 switching on 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 goes without saying that the usual safety valves, check valves etc. are provided, but are not shown here for the sake of clarity.

Claims (15)

1. Hochdruckflüssigkeitsanlage mit einem Druckflüssigkeitserzeuger (10), an den eine Spritzeinrichtung (42) angeschlossen ist, wobei ein Ventil (14) zwischen dem Druckflüssigkeitserzeuger (10) und der Spritzeinrichtung (42) durch einen Schalter (50) fernbetätigt geöffnet und geschlossen werden kann, um die Flüssigkeit der Spritzeinrichtung (42) bzw. dem Bereich der Saugseite des Druckflüssigkeitserzeugers (10) zuzuführen, dadurch gekennzeichnet, daß das Ventil (14) als einstelllbares Druckbegrenzungsventil ausgebildet und von an der Spritzeinrichtung (42) oder in deren Bereich angeordneten elektrischen Stellorganen (56, 58) fernbetätigt im Druck einstellbar ist, wobei ggfs. eine Verzögerungseinrichtung (40( zur ruckfreien Druckverstellung dem Ventil (14) zugeordnet ist.1. High-pressure liquid system with a hydraulic fluid generator (10), to which a spray device (42) is connected, wherein a valve (14) between the hydraulic fluid generator (10) and the spray device (42) can be remotely opened and closed by a switch (50) in order to supply the liquid to the spray device (42) or to the area of the suction side of the pressure fluid generator (10), characterized in that the valve (14) is designed as an adjustable pressure relief valve and by electrical actuators arranged on the spray device (42) or in the area thereof (56, 58) can be adjusted remotely in pressure, where appropriate a delay device (40 (for jerk-free pressure adjustment is assigned to the valve (14). 2. Anlage nach Anspruch 1, dadurch gekennzeichnet, daß das Druckbegrenzungsventil (14) durch eine Federkraft belastet ist, die durch eine Steuereinrichtung (20 bis 38) verstellbar ist.2. Plant according to claim 1, characterized in that the pressure relief valve (14) is loaded by a spring force which is adjustable by a control device (20 to 38). 3. Anlage nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß mittels einer Steuereinrichtung (20 bis 38) Druckstufen entsprechend der gewünschten Druckhöhe voreinstellbar sind, die durch Betätigung der Stellorgane (56, 58) wählbar sind.3. Plant according to claim 1 or 2, characterized in that by means of a control device (20 to 38) pressure levels can be preset according to the desired pressure level, which can be selected by actuating the actuators (56, 58). 4. Anlage nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Druckverstellung entsprechend einer vorgegebenen, insbesondere linearen Funktion zwischen dem Druck und der auf das Druckbegrenzungsventil (14) wirkenden Kraft vornehmbar ist.4. Installation according to one of claims 1 to 3, characterized in that the pressure adjustment according to a predetermined, in particular linear function between the pressure and the force acting on the pressure relief valve (14) can be performed. 5. Anlage nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß zu den elektrischen Stellorganen (56, 58) ein zusätzlicher AuslöseSchalter (50) in Reihe als Zweihandsicherung geschaltet ist.5. Plant according to one of claims 1 to 4, characterized in that an additional trigger to the electrical actuators (56, 58) Switch (50) is connected in series as a two-hand fuse. 6. Anlage nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, daß die Druckstufen zeitverzögert einfahrbar sind.6. Plant according to one of claims 3 to 5, characterized in that the pressure stages can be retracted with a time delay. 7. Anlage nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Verzögerungseinrichtung eine Drossel (40) ist.7. Plant according to one of claims 1 to 6, characterized in that the delay device is a throttle (40). 8. Anlage nach einem der Ansprüche 2 bis 7, dadurch gekennzeichnet, daß als Steuereinrichtung ein Luftkompressor (20) mit einem pneumatischen Steuerblock (22 bis 40) vorgesehen ist, wobei letzterer parallelgeschaltete Reduzierventile (24, 26, 28) zur Vorgabe von Druckstufen aufweist und jedem Reduzierventil (24, 26 28) ein Schaltventil (34, 36, 38) nachgeschaltet ist, das von einem zugeordneten Schalter an der Spritzeinrichtung (42) betätigtbar ist.8. Installation according to one of claims 2 to 7, characterized in that an air compressor (20) with a pneumatic control block (22 to 40) is provided as the control device, the latter having parallel-connected reducing valves (24, 26, 28) for specifying pressure stages and each reducing valve (24, 26 28) is followed by a switching valve (34, 36, 38) which can be actuated by an associated switch on the spray device (42). 9. Anlage nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß an der Spritzeinrichtung (42) eine optische Anzeige (52, 54, 55) vorgesehen ist.9. Installation according to one of claims 1 to 8, characterized in that an optical display (52, 54, 55) is provided on the spray device (42). 10. Anlage nach Anspruch 9, dadurch gekennzeichnet, daß die Anzeige aus Leuchtdioden (52, 54, 55) besteht.10. Plant according to claim 9, characterized in that the display consists of light-emitting diodes (52, 54, 55). 11. Anlage nach Anspruch 10, dadurch gekennzeichnet, daß mittels eines auch als Einschalter dienenden Stellorgans (56) der Spritzeinrichtung (42) die niedrigste Druckstufe einschaltbar ist und für die höheren Druckstufen ein als Schalter ausgebildetes Stellorgan (58) jeweils mit zugehörigen Leuchtdioden (54, 55) zugeordnet ist.11. Plant according to claim 10, characterized in that the lowest pressure level can be switched on by means of an actuator (56) of the spray device (42) which also serves as a switch, and an actuator (58) designed as a switch for the higher pressure stages each with associated light-emitting diodes (54 , 55) is assigned. 12. Anlage nach Anspruch 11, dadurch gekennzeichnet, daß durch Ausschalten des Stellorgans (56) die dem Stellorgan (58) für die höheren Druckstufen nachgeschalteten Schaltventile (36, 38) in Abschaltposition bringbar sind.12. Plant according to claim 11, characterized in that by switching off the actuator (56) the switching element (58) for the higher pressure stages downstream switching valves (36, 38) can be brought into the switch-off position. 13. Anlage nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß ein als Stellorgan eingesetzter Schalter (58) als Drucktaster mehrere Schaltstellungen aufweist, durch die jeweils ein Schaltventil (34, 36, 38) einer anderen Druckstufe betätigbar ist.13. Plant according to one of claims 1 to 12, characterized in that a switch used as an actuator (58) has a plurality of switching positions as a push button, through which a switching valve (34, 36, 38) of a different pressure level can be actuated. 14. Anlage nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, daß die Spritzeinrichtung (42) einen Abzug (51) aufweist, der den Auslöseschalter (50) betätigt, wobei das Zurückbringen des Abzugs (51) in seine Ruhstellung die vorgewählte Druckstufe erhält. 1 4. System according to one of claims 1 to 13, characterized in that the spray device (42) has a trigger (51) which actuates the trigger switch (50), the return of the trigger (51) in its rest position, the preselected pressure level receives. 15. Anlage nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, daß die Stellorgane (56, 58) in der Einschaltstellung des Auslöseschalters (50) gegen Betätigung gesperrt sind.15. Installation according to one of claims 1 to 14, characterized in that the actuators (56, 58) in the switched-on position of the trigger switch (50) are blocked against actuation.
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

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

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

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Also Published As

Publication number Publication date
DE3313249A1 (en) 1984-10-25
EP0124768B1 (en) 1988-02-24
JPS59206068A (en) 1984-11-21
US4585168A (en) 1986-04-29
EP0124768A3 (en) 1986-02-19
DE3469413D1 (en) 1988-03-31

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