EP0627268B1 - Flüssigkeits-Sprühvorrichtung, insbesondere für Druckmaschinen - Google Patents
Flüssigkeits-Sprühvorrichtung, insbesondere für Druckmaschinen Download PDFInfo
- Publication number
- EP0627268B1 EP0627268B1 EP94102871A EP94102871A EP0627268B1 EP 0627268 B1 EP0627268 B1 EP 0627268B1 EP 94102871 A EP94102871 A EP 94102871A EP 94102871 A EP94102871 A EP 94102871A EP 0627268 B1 EP0627268 B1 EP 0627268B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spray
- pump
- valve
- pressure
- fluid
- 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 - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F35/00—Cleaning arrangements or devices
-
- 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
- B05B12/02—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling time, or sequence, of delivery
-
- 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
- B05B9/0413—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 with reciprocating pumps, e.g. membrane pump, piston pump, bellow pump
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
- B41P2235/00—Cleaning
- B41P2235/10—Cleaning characterised by the methods or devices
- B41P2235/26—Spraying devices
Definitions
- the invention relates to a liquid spray device, especially for presses to apply liquid a rotating press cylinder or on one spraying moving substrate in the printing press, according to the preamble of claim 1.
- the invention is not applicable to the application Printing presses limited, but can be anywhere there be used where small amounts of liquid on a relatively large area can be evenly distributed need and a drip or a concentrated stream of liquid at the end of a spraying period if the Spray jet coincides, should be avoided.
- a concentrated or massive jet of liquid as well Drops form on one across the liquid flow moving object individual strips of moisture. This are not wanted.
- a liquid spray device is from DE-OS 28th 26 135 known.
- the liquid spray device is used there as a blanket washing device for moistening the A blanket cylinder blanket in a printing press. It contains piston pumps for the supply of liquids to a nozzle bar and spring-loaded check valves, which in the direction of flow to the nozzle bar towards the fluid pressure against the spring pressure be opened.
- the atomization of the liquids on Nozzle bar is not caused by the delivery pressure of the Piston pumps, but by a blast of compressed air, which after pushing the liquid out of the nozzle bar the piston pump in question previously a certain one Has promoted the amount of liquid in the nozzle bar.
- DE-OS 40 13 465 A1 shows a printing press with a Printing plate cylinder, a blanket cylinder, a Impression cylinder, an inking unit and a dampening unit.
- the liquid spray device of the present invention is suitable for spraying liquid, for example on such printing plate cylinders, blanket cylinders, Impression cylinders, rollers and rollers of inking units and Dampening of a printing press, and also for dampening of the printing material printed in such a printing press.
- the liquid can be, for example, water, liquid detergent, solvent or mixtures be of it. With this, for example, the mentioned Cylinder cleaned of ink and substrate fibers will.
- the object of the invention is to solve a problem After dripping and a collapse of the spray jet a massive jet of liquid and generated by it Moisture streaks on a sprayed object at the end to avoid a spray period.
- spray period is a predetermined, preferably adjustable period of time referred to during which a liquid flow to one made of small spray-like droplets existing spray is atomized.
- the invention will approximately at the end of a spray period the delivery of the liquid is switched off or the relevant liquid pressure line is blocked, and it will be right at the end of the spraying period or preferably the liquid pressure line shortly before the end of the spraying period Relieved of pressure via a pressure relief line.
- the pressure relief line has in relation to a much larger flow cross-section. This supports the pressure relief line not only the pressure reduction, which is also via the Nozzle or the nozzles of the spray device takes place, but the pressure relief line builds due to its large size Opening cross section the pressure also much faster, than through one or more nozzles of the sprayer alone would be possible.
- the supply of liquid in the pressure line is preferably directly at the end of the Spray period ended, either by switching off or Switching a pump or by a controlled “up” - “Closed” valve at an inlet end of the pressure line. In another embodiment can supply liquid be stopped shortly before the end of the spraying period.
- the pressure relief valve is preferred a short time before the end of the Spray period open, for example 1 s or a few 1/10 s before, and then during one over the Spraying period beyond the extended period of time.
- the part of the relaxation time before the end of the spraying period must be so short that that in the pressure line prevailing fluid pressure until the end the spraying period is sufficient, the liquid at the nozzle device in the form of a spray or a spray cloud atomize into fine spray droplets.
- the pressure relief valve up to about 0.2 s before the spraying period Kept closed at the end of the spraying period, then opened, and 0.8 s after the end of the spraying period kept open, and only then closed, so that gives a total relaxation time of approximately 1 s.
- the pressure relief valve When spraying periods in relatively short intervals follow each other, the pressure relief valve is in the way described above shortly after the expiry of relevant spray period closed again. While longer breaks, e.g. several hours, however preferably the pressure relief valve until shortly before Beginning or until the beginning of the next spraying period kept open and only then closed.
- the open Pressure relief valve leaves liquid pressures relax and thereby prevents temperature changes Liquid from the pressure line through the Nozzle device is pushed out. Temperature changes can lead to different volume changes Lead liquid and its lines through which the Liquid can be squeezed out of the lines.
- the liquid spray device shown in Fig. 1 is used to spray liquid 4 such as Water, solvent, liquid detergent or Mixtures thereof on printing press cylinders, such as for example blanket cylinders, printing plate cylinders or impression cylinder or other rotating Cylinder, roller or roller or running Substrates to wash, clean or easy to moisten.
- liquid 4 such as Water, solvent, liquid detergent or Mixtures thereof on printing press cylinders, such as for example blanket cylinders, printing plate cylinders or impression cylinder or other rotating Cylinder, roller or roller or running Substrates to wash, clean or easy to moisten.
- the downstream end 30 of the pressure relief line 26 opens above the level of the liquid 4 in the Container 2.
- the check valve 14 in the suction line 12 is called in the following suction line valve. It will by the suction force of the pump 6 against the force of one Valve spring 15 in the direction of flow towards pump 6 opened and when the suction power is lost by the Valve spring 15 closed.
- Check valve 24 in the pressure line 22 is in the following pressure line valve called. It is from the liquid pressure of the pump 6 in Flow direction away from the pump 6 towards Nozzle device 16 opened and when the liquid pressure drops below a certain value by the Valve spring 25 closed. This is the suction stroke Pump 6, the suction line valve 14 open and the pressure line valve 24 closed; is at the pressure stroke of the pump 6 the suction line valve 14 closed and the pressure line valve 24 open.
- the suction stroke and during one Spray period executed pressure stroke of the pump 6 are the same large.
- the amount is determined by the size of the suction stroke Liquid "dosed" into the pump 6, which during a following pressure stroke by the pressure of the pump 6 is sprayed by the nozzle device 16.
- the amount of liquid for example 40 ml.
- the pump 6 thus acts as Dosing pump.
- the nozzle device 16 contains immediately upstream one or more spray nozzles 32, which or the Generate spray jets 18, a spring-loaded check valve 34. This is in the following nozzle valve 34 called. It opens in the direction of flow of the spray jet 18 and is in the opposite direction by a Valve spring 35 pushed into the closed position. The power this valve spring 35 of the nozzle valve 34 is so large that it closes the nozzle valve 34 when the pressure of the Liquid in the pressure line 22 is not sufficient atomize the liquid at the nozzles 32.
- the Nozzle valve 34 has two functions: the closing pressure of the Valve spring 35 is so large that not even small ones Liquid pressures, for example less than 0.4 bar, which are far below the liquid atomization pressure, Liquid can leak.
- the closed nozzle valve 34 also prevents the liquid from running back and thus an emptying of the pressure line 22 through the Pressure relief valve 28 even if that Pressure relief valve 28 is open for a long time. At the closed nozzle valve 34 forms because no air can occur, the liquid holding Suction.
- the valve 28 in the pressure relief line 26 is in the hereinafter referred to as pressure relief valve 28. It is controlled by a control device 38 in such a way that it is from the beginning of the spraying period to just before the end the spraying period is closed, and then up to Open at the end of the spraying period.
- the distance of the suction stroke can be variably adjusted. Since the Suction stroke quantity essentially the subsequent pressure stroke quantity is set by setting the Suction strokes set or meter the amount of liquid, which is sprayed during the pressure stroke. The stroke length is also identical and at the same time as the spraying period. So that the pump 6 with the liquid for the Atomization required pressure to the nozzle device 16 and through their nozzles 32 in the form of a spray jet 18th can drift during the spraying period Pressure relief valve 28 at least from the beginning of Spray period until the end or at least until shortly before the end of the spraying period should be closed.
- the Pressure relief valve 28 is more preferred Embodiment only so shortly before the end of the spraying period opened that in the pressure line 22 and the Nozzle device 16 fluid pressure generated by the pump 6 is sufficient until the end of the spraying period, to the liquid 4 in the form of a spray 18 atomize.
- this is Pressure relief valve 28 before about 0.1 to 0.3 s Open the spraying period and then approximately Held open for 0.8 s beyond the spraying period so that a total fluid pressure relaxation time of results in approximately 1 s.
- the pressure relief valve 28 remain open longer. It must be at the beginning of the next spray period at the latest be closed again. The end of the spraying period is at the same time that the pressure stroke end of the pump is reached 6.
- the timing of opening and closing of the pressure relief valve 28 is carried out by an electronic Control device 38.
- the Control device 38 coordinated in time electrical signals or electrical operating voltages to the pump 6 and to the pressure relief valve 28 submit their operation.
- There can be a sensor 40 on the Pump 6 may be provided, which depending on a certain stroke position of the pump piston 8 gives electrical signals to the control device 38.
- the sensor 40 to the control device 38 a signal when the Pump piston 8 shortly before its pressure stroke position at the end of the pressure stroke path.
- the Control device 38 preferably the pump drive the pump piston 8 acting compressed air or Actuating hydraulic fluid, from, so shortly before the pump piston reaches the end of the pressure stroke, a) that the pump piston 8 slows down and thereby "soft" reached the end of the pressure stroke and b) that as a result the energies present in the system - operating pressure of the Pump piston 8, its kinetic energy, fluid pressure in the pressure line 22 and mechanical tension this pressure line 22 - the liquid 4 until End of spray period from nozzle device 16 is sprayed without liquid drops and fall off.
- the control device 38 to the Pressure relief valve 28 give a signal by which it is opened; it must be at the end of the latest Spray period should be open.
- the pump piston 8 begins its suction stroke movement. Thereby the pressure line valve 24 is now quickly closed.
- the pressure line 22 can be a hose.
- the pressure relief valve 28 can be a 2/2-way valve be.
- the Duration and the beginning and end of the spraying period, the size of the suction stroke of the metering pump 6 and thus the amount of liquid sprayed during a spraying period, and other operating parameters to different values can be set.
- a liquid spray device are technical in FIG. 1 or functionally equivalent parts with the same Provide reference numbers.
- the main difference consists in that in FIG. 2 a control unit 38 controlled open and closed valve 44 in the Pressure line 44 is arranged at a location which upstream of the connection point of the pressure relief line 26 lies in the pressure line 22.
- the duration of the spraying period is therefore essentially identical to the "open” period of this controlled Valve 44.
- the amount sprayed during the spraying period Liquid is also dependent on the "open” period of this valve 44. It will therefore be described below "Dosing valve” 44 called.
- With the metering valve 44 open is pump 7 liquid shown in Fig.
- the pressure relief valve 28 will also here in the manner described just before the end of Spray period open, the end of the spray period is the time at which the metering valve 44 through the control device 38 from the open position into the Closed position is switched.
- the pump 7 of FIG. 2 is a piston pump and has one Suction volume and an equal pressure volume, which around are many times larger than that during one Spray period sprayed from the nozzle device 16 Amount of liquid.
- the suction volume is, for example 200 ml.
- the during a spray period by the The amount of liquid sprayed by the pump pressure is for example 40 ml. This makes the pump piston 8 only a part of it during a spraying period entire pressure stroke.
- Fig. 2 shows the possibility of the suction side of the pump 7 several pressure lines 22, 22/2, 22/3, 22/4, 22/5 ... for a corresponding same number of nozzle devices 16 to connect.
- a metering valve 44/2, 44/3 etc., and to each Pressure line is a separate pressure relief valve 28 its own pressure relief line 26, 26/2 etc. connected. This allows 7 (or in Fig. 1 with a single pump 6) liquid individually to one or to a variety of nozzle devices 16 are funded.
- All pressure lines 22, 22/2, 22/3 ... are one only check valve 50 to the pressure side outlet 20 of the pump 7 connected.
- This check valve 50 is directly at or close to the discharge outlet 20 arranged and prevented during the suction stroke Pump 7 sucking back liquid 4 from the upstream of the metering valves 44, 44/2 ... Pressure line sections in the pump 7.
- This Check valve 50 is determined by the delivery pressure of the pump 7 during the pressure stroke in the direction of delivery from the pump 7 opened away against the force of a valve spring 51 and when changing from the pressure stroke to the suction stroke by the Valve spring 51 and by the negative pressure of the pump 7 closed.
- control device 38 the pressure relief valve 28 and the Metering valves 44, 44/2 ... and the pump 7 die Control signals or operating signals in such a way that the Pressure relief valve 28 during the spraying period is initially closed, but shortly before the end of Spray period is opened and then until the end of the Spraying period remains open.
- the control device 38 controls the pump 7 so that it in so much liquid in one full suction stroke 4, for example 200 ml, from the container 2 over the Suction line 12 sucks, as for several spraying periods are needed. This means that at every spraying period the piston 8 of the pump 7 is only a part of the the entire pressure stroke distance.
- This Partial pressure stroke distance depends on whether during a Spray period only one or more of the metering valves 44, 44/2 ... are open.
- the pump 7 can be arranged a plurality of sensors 40, which of Control device 38 via electrical lines Report the respective stroke position of the pump piston 8. This enables a check whether the pump piston 8 is is actually in the position in which it is based on the control signals of the control device 38 should be located. In this way, the control device 38 determine, for example, whether the pump 7 is always sufficiently filled with liquid 4 or in undesirably contains air. In the same way may also be by a single or multiple sensors 40 in the embodiment of Figure 1, the control device 38 monitor whether the pump 6 is properly liquid 4 sucks or contains air in an undesirable manner. Air is much more "compliant", i.e. she can with one certain pressure of the pump piston 8 is compressed much more are considered a liquid. Thereby the Pistons with a certain piston pressure in air other Axial positions than with liquid in the cylinder space.
- the optimal relaxation time during which the Pressure relief valve 28 of Figures 1 and 2 opened and the overlap time by which the Relaxation time extends into the end of the spraying period depend on the type of liquid.
- a Another important factor is whether the liquid is gases developed or contains. For example, contain or some detergents develop gases and then form Gas bubbles in the washing liquid. Such gas bubbles are from the delivery pressure of the pump 6 or 7 during the Pressure stroke compressed more than the liquid portion, so that a liquid containing gases at the end the spray period also much stronger in the pressure line 22, 22/2, 22/3 ... expanded as a liquid, which contains no gases.
- the greater the proportion of gas in the Pressure line 22, 22/2, 22/3 ... is the more important the pressure relief valve 28.
- the relaxation time can meet these criteria during which the pressure relief valve 28 for pressure relief the pressure line 22, 22/2, 22/3 ... at least must be opened, between approximately 0.1 s and 2 s and the overlap time by which the Relaxation time extends into the end of the spraying period, can range from about 0.05 s to 0.5 s.
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- Nozzles (AREA)
Description
- Fig. 1
- eine schematische Darstellung einer Flüssigkeits-Sprühvorrichtung nach der Erfindung mit einer Kolbenpumpe, deren Pumpenhub die während einer Sprühperiode zerstäubte Flüssigkeitsmenge bestimmt, wobei die Sprühperiode im wesentlichen der Zeitdauer des Druckhubes der Pumpe entspricht und die während einer Sprühperiode von einer Düsenvorrichtung zerstäubte Flüssigkeitsmenge der während des Druckhubes von der Pumpe geförderten Flüssigkeitsmenge entspricht, und
- Fig. 2
- eine schematische Darstellung einer weiteren Ausführungsform einer Flüssigkeits-Sprühvorrichtung nach der Erfindung, bei welcher die während einer Sprühperiode zerstäubte Flüssigkeitsmenge durch die Öffnungszeiten von gesteuert geöffnet und geschlossenen Ventilen bestimmt wird, die sich im Strömungsweg zwischen einer Pumpe und einer Düsenvorrichtung befinden.
Claims (11)
- Flüssigkeits-Sprühvorrichtung, insbesondere für Druckmaschinen, um Flüssigkeit auf einen rotierenden Druckmaschinenzylinder oder auf einen bewegten Bedruckstoff in einer Druckmaschine zu sprühen, mit einer Düsenvorrichtung (16) zum Zerstäuben und Sprühen der zerstäubten Flüssigkeit (4) in Form eines Sprühstrahles (18) während einer gesamten vorbestimmten Zeitdauer einer Sprühperiode, einer Saugleitung (12), welche die Saugseite (10) der Pumpe (6; 7) mit einem Behälter (4) strömungsmäßig verbindet und ein Saugleitungsventil (14) enthält, bei dessen Offenstellung die Pumpe Flüssigkeit (4) aus dem Behälter (2) saugen kann, mindestens einer Druckleitung (22; 22, 22/2, 22/3, 22/4, 22/5, ... ), welche die Druckseite (20) der Pumpe (6; 7) mit der Düsenvorrichtung (16) strömungsmäßig verbindet und ein Druckleitungsventil (24; 44, 44/2, 44/3, ... ) enthält, bei dessen Offenstellung die Pumpe (6; 7) die angesaugte Flüssigkeit durch die Druckleitung (22; 22, 22/2, 22/3, 22/4, 22/5, ... ) zur Düsenvorrichtung (16) fördern kann,
dadurch gekennzeichnet,
daß eine Druckentspannungsleitung (26) vorgesehen ist, welche zwischen dem Druckleitungsventil (24; 44, 44/2, 4/3 ... ) und der Düsenvorrichtung (16) von der Druckleitung (22; 22, 22/2, 22/3, 22/4, 22/5, ... ) abzweigt und ein, von einer Steuereinrichtung (38) automatisch gesteuertes Druckentspannungsventil (28) enthält, welche (38, 28) derart ausgebildet sind, daß das Druckentspannungsventil (28) während des Betriebes der Flüssigkeits - Sprühvorrichtung von der Steuereinrichtung (38) mindestens während einer so langen Anfangs-Zeitdauer der Sprühperiode in Schließstellung gehalten wird, daß die Pumpe (6; 7) während dieser Zeitdauer Flüssigkeit zur Düsenvorrichtung (16) fördern und durch sie hindurch zerstäuben kann, jedoch spätestens zum Zeitpunkt des Endes der Sprühperiode von der Steuereinrichtung (38) geöffnet wird und dadurch den Flüssigkeitsdruck von der Druckleitung (22; 22, 22/2, 22/3, 22/4, 22/5, ... ) in die Druckentspannungsleitung (26) entweichen läßt. - Flüssigkeits-Sprühvorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß während des Betriebes das Druckentspannungsventil (28) automatisch bereits kurz vor Beendigung der Sprühperiode geöffnet wird und dann bis über das Ende der Sprühperiode hinaus während einer vorbestimmten Entspannungszeit offengehalten wird, bevor es dann für die nächste Sprühperiode wieder geschlossen wird, wobei die Zeitdauer vor Beendigung der Sprühperiode so kurz ist, daß der von der Pumpe (6; 7) erzeugte Flüssigkeitsdruck bis zum Ende der Sprühperiode eine Zerstäubung der Flüssigkeit an der Düsenvorrichtung (16) bewirkt. - Flüssigkeits-Sprühvorrichtung nach Anspruch 2,
dadurch gekennzeichnet,
daß während des Betriebes das Druckentspannungsventil (28) in der Größenordnung von 1 s oder wenigen 1/10 s automatisch bereits kurz vor Beendigung der Sprühperiode geöffnet wird. - Flüssigkeits-Sprühvorrichtung nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß die Pumpe (6) eine Kolbenpumpe ist, welche wechselweise einen Saughub und einen gleichgroßen Druckhub ausführt, daß während des Betriebes die Zeitdauer des Druckhubes ungefähr zeitgleich mit der Sprühperiode ist, so daß die während des Druckhubes geförderte Flüssigkeitsmenge jeweils ungefähr gleich der während einer Sprühperiode versprühten Flüssigkeitsmenge ist. - Flüssigkeits-Sprühvorrichtung nach Anspruch 4,
dadurch gekennzeichnet,
daß die Saughubstrecke der Kolbenpumpe einstellbar ist, und daß die Sprühvorrichtung derart ausgebildet ist, daß sie im Betrieb den Pumpenkolben (8) während des Druckhubes ungeachtet von der Größe des Saughubes stets bis zum Ende des Druckhubweges bewegt. - Flüssigkeits-Sprühvorrichtung nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet,
daß das Saugleitungsventil (14) ein in Strömungsrichtung zur Pumpe (6; 7) hin öffnendes, jedoch in Gegenrichtung schließendes Rückschlagventil ist. - Flüssigkeits-Sprühvorrichtung nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet,
daß das Druckleitungsventil (24) ein in Strömungsrichtung von der Pumpe (6) weg öffnendes, jedoch in Gegenrichtung schließendes Rückschlagventil ist. - Flüssigkeits-Sprühvorrichtung nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet,
daß das Druckleitungsventil (44, 44/2, 44/3 ...) ein von der Steuereinrichtung (38) gesteuertes Ventil ist, welches von der Steuereinrichtung (38) zeitlich abgestimmt auf die Öffnungszeiten und die Schließzeiten des Druckentspannungsventils (28) jeweils geschlossen oder geöffnet wird. - Flüssigkeits-Sprühvorrichtung nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet,
daß an die Druckseite (20) der Pumpe (6; 7) eine Vielzahl von Druckleitungen (22, 22/2, 22/3, ... ) für eine entsprechende Vielzahl von Düsenvorrichtungen (16) angeschlossen ist. - Flüssigkeits-Sprühvorrichtung nach einem der Ansprüche 1 bis 9,
dadurch gekennzeichnet,
daß im Strömungsweg zwischen der Pumpe (7) und dem Druckleitungsventil (44, 44/2, 44/3, ... ) nahe beim oder im druckseitigen Auslaß (20) der Pumpe (7) ein Rückschlagventil (50) angeordnet ist, welches in Strömungsrichtung von der Pumpe (7) weg zum Druckleitungsventil hin öffnet und in Gegenrichtung schließt, und welches von einer Feder (51) in Schließrichtung gedrängt wird, um ein Absaugen von Flüssigkeit oder Luft aus der Druckleitung (22, 22/2 22/3, ... ) in die Pumpe (7) bei einem Saughub zu verhindern. - Flüssigkeits-Sprühvorrichtung nach einem der Ansprüche 1 bis 10,
dadurch gekennzeichnet,
daß die Düsenvorrichtung (16) wenigstens eine Düsenöffnung (32) und stromaufwärts nahe dieser Düsenöffnung (32) ein Rückschlagventil (34) aufweist, welches von einer Ventilfeder (35) in Schließstellung gedrängt und vom Druck der Flüssigkeit in der Druckleitung (22; 22, 22/2, 22/3, ... ) entgegen der Kraft der Ventilfeder (35) in Sprührichtung geöffnet wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4318647A DE4318647A1 (de) | 1993-06-04 | 1993-06-04 | Flüssigkeits-Sprühvorrichtung, insbesondere für Druckmaschinen |
DE4318647 | 1993-06-04 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0627268A2 EP0627268A2 (de) | 1994-12-07 |
EP0627268A3 EP0627268A3 (de) | 1995-07-26 |
EP0627268B1 true EP0627268B1 (de) | 1998-08-26 |
Family
ID=6489675
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94102871A Expired - Lifetime EP0627268B1 (de) | 1993-06-04 | 1994-02-25 | Flüssigkeits-Sprühvorrichtung, insbesondere für Druckmaschinen |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0627268B1 (de) |
DE (2) | DE4318647A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN101486067B (zh) * | 2007-11-30 | 2012-08-01 | 奥斯卡弗里茨两合公司 | 铸造机用脱模剂喷射装置 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19503950B4 (de) * | 1995-02-07 | 2004-10-28 | Heidelberger Druckmaschinen Ag | Wascheinrichtung im Druckwerk von Druckmaschinen |
DE19936144B4 (de) * | 1999-07-31 | 2006-09-21 | Koenig & Bauer Ag | Einrichtung zum Aufbringen von Flüssigkeit |
DE502005007747D1 (de) | 2005-05-02 | 2009-09-03 | Baldwin Oxy Dry Gmbh | Reinigungssystem für Zylinderoberflächen einer Druckmaschine |
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DE2826135C2 (de) * | 1978-06-15 | 1982-11-18 | Baldwin-Gegenheimer GmbH, 8900 Augsburg | Gummituch-Waschvorrichtung |
US4387850A (en) * | 1980-12-29 | 1983-06-14 | Modern Mill, Inc. | Remote control apparatus for power washers |
DE3714000A1 (de) * | 1987-04-27 | 1988-11-10 | Behr Industrieanlagen | Steuersystem fuer eine programmgesteuerte spruehvorrichtung |
AU2722188A (en) * | 1987-08-17 | 1989-03-09 | Precision Engineered Systems Inc. | Automatic blanket wash system with flow through spray bar |
US4932232A (en) * | 1988-05-20 | 1990-06-12 | Alcan Aluminum Corporation | Methods of detecting and correcting spray header malfunctions |
DE3942496A1 (de) * | 1989-12-22 | 1991-06-27 | Breining Robert Masch | Verfahren zum dosierten auftragen eines fluessigen bindemittels, insbesondere von bitumen, auf eine oberflaeche |
DE4013064A1 (de) * | 1990-04-24 | 1991-10-31 | Ficht Gmbh | Verfahren zum spruehstrahlen von farbe und anordnung zur durchfuehrung des verfahrens |
DE4122594C2 (de) * | 1991-05-23 | 1997-07-03 | E I C Group Gmbh | Vorrichtung zum einstellbaren Zuführen eines flüssigen Materials |
-
1993
- 1993-06-04 DE DE4318647A patent/DE4318647A1/de not_active Withdrawn
-
1994
- 1994-02-25 EP EP94102871A patent/EP0627268B1/de not_active Expired - Lifetime
- 1994-02-25 DE DE59406758T patent/DE59406758D1/de not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101486067B (zh) * | 2007-11-30 | 2012-08-01 | 奥斯卡弗里茨两合公司 | 铸造机用脱模剂喷射装置 |
Also Published As
Publication number | Publication date |
---|---|
DE4318647A1 (de) | 1994-12-08 |
EP0627268A2 (de) | 1994-12-07 |
DE59406758D1 (de) | 1998-10-01 |
EP0627268A3 (de) | 1995-07-26 |
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