EP0829313B1 - Automatic installation for cleaning workpieces - Google Patents

Automatic installation for cleaning workpieces Download PDF

Info

Publication number
EP0829313B1
EP0829313B1 EP97115224A EP97115224A EP0829313B1 EP 0829313 B1 EP0829313 B1 EP 0829313B1 EP 97115224 A EP97115224 A EP 97115224A EP 97115224 A EP97115224 A EP 97115224A EP 0829313 B1 EP0829313 B1 EP 0829313B1
Authority
EP
European Patent Office
Prior art keywords
air
installation according
steam
blast
channel
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
Application number
EP97115224A
Other languages
German (de)
French (fr)
Other versions
EP0829313A3 (en
EP0829313A2 (en
Inventor
Karl-Heinz Wüller
Otfried Meyer
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.)
Ecoclean GmbH
Original Assignee
Duerr Ecoclean 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 Duerr Ecoclean GmbH filed Critical Duerr Ecoclean GmbH
Publication of EP0829313A2 publication Critical patent/EP0829313A2/en
Publication of EP0829313A3 publication Critical patent/EP0829313A3/en
Application granted granted Critical
Publication of EP0829313B1 publication Critical patent/EP0829313B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00Cleaning by methods involving the use of air flow or gas flow
    • B08B5/02Cleaning by the force of jets, e.g. blowing-out cavities
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02Cleaning by the force of jets or sprays
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2230/00Other cleaning aspects applicable to all B08B range
    • B08B2230/01Cleaning with steam

Definitions

  • DE-A-34 19 028 is already a cleaning system with which dust from the surfaces of workpieces, such as bodies to be painted, blown off shall be.
  • This well-known system has a channel-like lock chamber, which at both ends closed by an inlet-side and an outlet-side lifting gate can be and in which one covers the whole Roller conveyor extending length of the lock chamber arranged on which the objects to be cleaned are placed and with which moves the latter through the lock chamber become.
  • this known system has an air circulation system with a fan for conveying air too two annular blown air ducts, which run in the longitudinal direction of the channel forming the lock chamber at a distance from one another are arranged and each of four straight segments is formed, which is in the interior of the lock chamber protruding channel.
  • the lock chamber Between the two Blown air channels are also the lock chamber with one provided a ring-shaped air extraction duct, the two mechanical air filters connected in series from which the fan sucks in the air again.
  • the workpieces to be cleaned are made using the roller conveyor clocked through the lock chamber; first of all the inlet-side lift gate opened, whereupon a first workpiece to be cleaned or a first batch to be cleaned Workpieces inserted into the lock chamber and on the Roller conveyor is deposited.
  • the lift gate on the inlet side After reaching a first position in front of the first blowing air duct is the lift gate on the inlet side closed, whereupon the air circuit is put into operation and the workpiece or the workpieces through the first annular Blown air duct passed and before the second annular blown air duct is or will be shut down. Subsequently the lift gate on the inlet side is opened again Load the lock chamber with the next batch, the one on the inlet side Lift gate closed again and the roller conveyor one Step clocked, the first batch the second annular blow air duct and the second batch the first Blown air duct passes etc.
  • the workpieces to be cleaned have to go into the lock chamber individually or in batches be introduced, d. H. this well-known cleaning system can only work discontinuously; are also proportional complex workpiece handling devices required, around the workpieces to be cleaned through the open to apply inlet gate on the roller conveyor and the cleaned workpieces through the open outlet side Remove the lift gate from the roller conveyor.
  • a similar cleaning system is from DE-A-37 34 200 known, which, however, from the cleaning system after the DE-A-34 19 028 differs in that with a high pressure air jet is cleaned, generated by a high pressure blower.
  • the invention has for its object in an automatic working cleaning system the benefits of cleaning to use the workpieces by means of air jets at the same time but to significantly improve the cleaning effect, and even if, for reasons of energy costs, with blown air jets and not working with high-tension air is, although in principle the latter would also be conceivable.
  • the basic idea of the invention is now the cleaning effecting air jet a relatively small amount Add water vapor so that the one to be cleaned Air jet hitting the workpiece, at least predominantly, the water contains in vapor form. It has been shown that unexpectedly good cleaning results can be achieved if instead of pure air an air-water vapor mixture appears the workpiece to be cleaned acts, even then, if the proportion of water vapor in the blast air jet is proportional is low. On the one hand, workpieces can even be made in this way degrease well, and on the other hand dry the workpieces the cleaning process quickly, if only the air jet low required to achieve the cleaning process Amount of steam is added.
  • the good that can be achieved with the invention may be based Cleaning effect, among other things, on the fact that at a cleaning with steam completely demineralized water or whose steam hits the workpiece and fully desalinated Water is "more aggressive" than normal water, i.e. H. dirt absorbs more easily than non-desalinated water; simultaneously carries out the cleaning by means of air jets, which is proportionate small amounts of water vapor were added, however to ensure that the cleaned workpieces immediately after the Cleaning is dry again or dry quickly by itself.
  • the cleaning according to the invention has a very good cleaning effect with it, it is extremely gentle, so that z. B. the paint on a painted workpiece surface remains undamaged. This can also be done for the invention Cleaning water to be evaporated easily a small amount of an anti-corrosion agent is added so as to corrode the cleaned workpieces prevent.
  • Another great advantage of the invention is that see that the agents to be provided according to the invention any cleaning system working with air jets without have more retrofitted.
  • the dirt detached from the workpieces can also be let out remove the steam condensate easily, especially with a common cyclone separator, so that it is possible that used water, including any anti-corrosion agents, reuse after appropriate reprocessing, although those required for cleaning according to the invention small amounts of water easily an economical Allow disposal.
  • DE-A-44 40 146 describes a device for cleaning Become known objects, which comprises (a) a common High pressure cleaning device with a steam generator for generation high-tension, hot water vapor, (b) an air compressor to generate a jet of compressed air, and (c) one pistol-like spray lance, as used in connection with the usual high-pressure cleaning devices is used, wherein in this spray lance the high tension, hot steam and the compressed air are brought together, just before the Outlet opening of the spray lance, and also in the A granular abrasive is introduced into the compressed air jet, before the water vapor is introduced into the compressed air jet.
  • this known cleaning device is a so-called blasting device acts through which to be cleaned Objects with a high-speed compressed air jet which are the granular abrasive entails
  • this known cleaning device is suitable for this reason alone not for gentle workpiece cleaning, that would allow even painted workpieces to clean without the painted workpiece surface is damaged.
  • a known high-pressure cleaning device with a steam generator that this known cleaning device of the granular abrasive with the leading compressed air jet a high proportion of water vapor contains, so that the cleaned items after the Cleaning are wet and subjected to a separate drying process would have to be this well-known cleaning device in a production and / or assembly line deploy.
  • Another cleaning device is known from DE-A-41 22 864 became known, which works with water vapor, namely a cleaning device for cleaning dirt soiled Objects, masonry, streets or the like, but also for peeling field crops such as potatoes and sugar beets and the same.
  • this known cleaning device is supposed to compress air so strongly by a compressor be that the air is heated, whereupon the Highly compressed, warm or even hot air if necessary a liquid, such as water, is mixed in.
  • the liquid content should be so high that when the air-liquid mixture is cooled to below 0 ° C, the to be cleaned Fruit peeled by frozen liquid particles as is the case with blasting using a granular Abrasive would be the case. So it is obvious that in this known cleaning device with a relatively high water content of the cleaning jet worked becomes.
  • Compressed air cleaning systems are known from GB-A-2 283 906, where a liquid from a liquid tank a spray gun is supplied to in the spray gun with Compressed air to be mixed.
  • the liquid will be out the liquid tank by applying an elevated one Pressure is conveyed through a pressure line into the spray gun, the amount conveyed is set by means of a pressure regulator can be.
  • the supplied liquid for example Water is supplied to the compressed air in liquid form.
  • steam is also emitted from a cleaning lance fed to a steam generator; this steam becomes the cleaning lance fed through a separate steam supply line and emerges from a separate nozzle without the Compressed air emerging through its own nozzles become.
  • the steam can Air jet is added upstream of the blow nozzle, it is however advantageous to steam as shortly before or even as possible to be added to the air jet within the blow nozzle so that the Steam as much as possible in vapor form on what is to be cleaned Workpiece hits and the smallest possible amount of steam required are.
  • the cleaning system could, for example, be a U-shaped one Have cross-section and be open at the top or only from two in Direction of movement of the workpieces running parallel to each other lateral splash protection walls are formed.
  • Embodiments allow further improvement of the Cleaning system according to the invention such that the blown air is at least almost completely circulated; a corresponding embodiment is characterized by a the duct and the air conveyor, the blower nozzle and the condensate separator including closed blown air circuit (apart from the fact that possibly not really the inlet and outlet of the channel is absolutely gas-tight as long as the workpiece or the workpieces are being cleaned). Too high Moisture content of the blown air circulated avoided in this embodiment in that with appropriate Design of the blown air circuit that of the blown air added steam downstream of the cleaning point at least is largely condensed out.
  • the outlet of the channel to provide on a bottom of the latter so as to To take into account that the walls of the canal as baffle for the blowing air or the used blowing air carried condensate droplets, d. H. as liquid separation elements.
  • blower air nozzle or several blower air nozzles could be from one robot-like handling device held and along the cleaning workpieces and / or moved around them; however, it is easier to design the blow nozzle so that they at least essentially the workpiece to be cleaned has surrounding air outlet opening and blow nozzle as well Workpiece relative to one another transversely to this air outlet opening are movable, in particular by that the workpieces through the workpiece transport device be passed through the blow nozzle.
  • a workpiece carrier Area of the transport device transverse to the longitudinal direction of the channel is permeable to air, because then the blown air together with that of your carried steam from all directions to that of the Transport device to be carried workpieces.
  • the air conveyor does not convey the blown air to the blower nozzle under high pressure, since the energy requirement of the cleaning system is thereby minimized.
  • the air conveyor is designed in such a way that it delivers at least about 600 m 3 / h of blown air per blowing nozzle.
  • the blowing air per blowing nozzle is approximately 3 to approximately 15 kg / h of steam can be added.
  • the steam is supplied by a steam generator which is designed so that the water vapor has a pressure of approximately 0.5 to 8 bar and a temperature of approximately 110 ° C to 200 ° C. If the water to be evaporated is an anti-corrosion agent should be added, it is completely sufficient if the water is at most 0.5 vol.%, preferably only Contains 0.1 to 0.2% by volume of the anti-corrosion agent.
  • the air conveyor is designed such that the Air of the blow nozzle with a pressure of at most approximately 0.3 bar, preferably supplied by only about 0.2 bar becomes.
  • the distance between the outlet opening the blow nozzle of the workpiece to be cleaned if possible to choose small, which is why in preferred embodiments the cleaning system according to the invention this distance, too depending on the contours of the workpieces to be cleaned, is about 0.1 to 5 cm.
  • the amount of steam to be supplied to the blown air per unit of time can are controlled by the energy supplied to the steam generator; but it may be advisable to use the water to the steam generator by means of a metering pump, preferably by means of an adjustable with regard to their delivery rate Metering pump.
  • the cleaning system shown as a whole in Fig. 1 has a channel 10, which on its circumference - you can see once from openings described below - closed everywhere, but on both ends is open; the left end according to FIG. 1 thus forms one Inlet / outlet opening 12 for the workpieces to be cleaned.
  • an annular Blowing nozzle 14 comprises, which is illustrated by an arrow, likewise has annular nozzle opening 16 -
  • the wall of the channel 10 has an annular shape Slot; preferably the blowing nozzle 14 does not protrude inside the channel 10 and it is special trained as described in DE-A-44 25 765 and was shown.
  • the nozzle opening 16 is oriented so that the Blower nozzle 14 generates an annular jet of blown air, which directed into the interior of the channel 10 and something is inclined towards the inlet / outlet opening 12.
  • the inlet / outlet opening 12 is a workpiece transport device assigned with which a workpiece to be cleaned 20 through the inlet / outlet opening into the Insert channel 10, push it through the nozzle opening 16 and then pull it out of the channel 10 again;
  • this Workpiece transport device includes one in the longitudinal direction of the channel 10 extending slide rod 22, which held by means not shown and in the longitudinal direction of the channel 10 can be pushed back and forth, as well as a workpiece carrier 24 held by the slide rod 22 a bulkhead 26 and 28 are attached to both ends thereof is.
  • the workpiece carrier 24 forms one in the vertical direction air-permeable support for one to be cleaned Workpiece 20, while the two bulkheads 26 and 28 are impermeable to air and - if you look at the area of the Suction funnel 18 - sealing on the inner wall of the Can slide along 10.
  • the Workpiece carrier 24 designed so long that after insertion of a workpiece 20 to be cleaned in the channel 10 in the in Fig. 1 shown starting position of the workpiece carrier for the cleaning process the bulkhead 28 somewhat behind, d. H. 1 is to the right of the nozzle opening 16, while the bulkhead 26 is approximately at the left end according to FIG. 1 the suction funnel 18 is located.
  • the channel 10 together with the blowing nozzle 14 is at least one component essentially closed blowing air circuit 30, the Parts to be described below:
  • a cleaning liquid to be used in the cleaning process i.e. water or water with added anti-corrosion agent
  • a cleaning liquid tank 42 this is by means of a metering pump 44 and a suction line 46 cleaning liquid is sucked off and into a Pressure line 48 promoted, which one with regard to its Power contains in particular adjustable steam generator 50.
  • the pressure line 48 is sealed in the blown air line 40 is introduced and ends there in one Nozzle 51, with the aid of which the steam shortly before the blowing nozzle 14 is blown into the blown air stream and expanded.
  • the steam is injected slightly upstream of the annular Blowing nozzle 14 has the advantage that you can with a single nozzle 51 needs and not more than the circumference of the blow nozzle 14 distributed nozzles required.
  • the separator 34 contains approximately half the height a cyclone separator 60, which is of known construction can be and therefore not described in detail and must be shown graphically. It serves from through the fan 38 via the suction line 32 the duct 10 sucked blown air stream steam condensate and if necessary, anti-corrosive droplets and dirt, which has been removed from the cleaned workpiece, with the help of centrifugal forces generated that the blown air to be cleaned in Cyclone separator 60 forms a vortex, below an approximately funnel-shaped partition 62 of the separator 34. From the cleaned workpiece Solid particle dirt 64 then sediments at the bottom of the Separator 34 while z. B. by cutting oils contaminated condensate 66 over the solid particle dirt 64 settles in the separator 34.
  • the through the Cyclone separator 60 cleaned blowing air passes through a Opening in the center of the partition 62 in the upper part of the Separation device 34 and passes there interchangeably attached filter candles 70, whereupon the so cleaned Blown air enters the suction line 36.
  • the contaminated condensate 66 is removed from the separator 34 deducted, by means of a drain line 72, which preferably contains a valve 74.
  • the drain pipe 72 leads to a processing device shown only schematically 76, in a manner known per se Greases, oils or other similar contaminants from the condensate be separated and which should also contain a pump with the cleaned condensate back into the cleaning liquid tank 42 is funded.
  • workpiece carrier 24 can be replaced with a single, 1 workpiece 20 also shown with several, to be loaded for cleaning workpieces.
  • the Slide rod 22 by a double-acting and horizontal Replaceable pressure medium cylinder replaced be, which over a holding the workpiece carrier 24 Piston rod has and also provided with a bulkhead is, which after inserting the workpiece carrier 24 in closes the duct 10 whose left end according to FIG. 1 is airtight - Because of the bulkhead 28 can during the cleaning process neither blowing air, nor dirt from the right open Exit end of channel 10.

Description

Werkstücke, insbesondere solche, welche durch Schleifen, Bohren, Fräsen, Drehen, Sägen, Gewindeschneiden und dergleichen bearbeitet wurden, bedürfen vielfach einer gründlichen Reinigung, um Späne, Schleifkörner und dergleichen, vor allem aber auch Rückstände von Bearbeitungsflüssigkeiten, wie Schneidund Kühlöle, oder andere Bearbeitungsrückstände möglichst vollständig zu entfernen; eine Werkstück-Reinigung, z. B. ein Entfetten, kann aber auch nach anderen Behandlungsvorgängen erforderlich sein.Workpieces, especially those that are ground by grinding, drilling, Milling, turning, sawing, tapping and the like processed, often require thorough cleaning, for chips, abrasive grains and the like, but above all also residues of machining fluids such as cutting and Cooling oils, or other processing residues if possible completely remove; a workpiece cleaning, e.g. B. a Degreasing, but can also after other treatments to be required.

Eine solche Reinigung erfolgte bislang in der Praxis fast ausschließlich dadurch, daß die Werkstücke mit einer Reinigungsflüssigkeit (organische Lösemittel oder wässrige, Tenside enthaltende Reinigungsflüssigkeiten) durch Abspritzen und/oder Tauchen gereinigt und anschließend getrocknet wurden.So far, such cleaning has almost been done in practice only in that the workpieces with a cleaning liquid (organic solvents or aqueous, surfactants containing cleaning liquids) by hosing down and / or dipped and then dried.

Eine andere, primitive Art der Werkstückreinigung ohne den Einsatz einer Reinigungsflüssigkeit ist insbesondere in metallverarbeitenden Betrieben üblich: Nach der Bearbeitung wird das Werkstück von Hand mittels einer Preßluftdüse abgeblasen mit der Folge, daß Späne und andere Bearbeitungsrückstände in die Umgebung geblasen werden, was zu einer höchst störenden Verunreinigung des Arbeitsplatzes führt.Another, primitive type of workpiece cleaning without the Use of a cleaning liquid is particularly in metal processing companies usual: After processing the workpiece is blown off manually using a compressed air nozzle with the result that chips and other processing residues to be blown into the environment, resulting in a most disturbing pollution of the workplace.

Aus der DE-A-34 19 028 ist nun schon eine Reinigungsanlage bekanntgeworden, mit der Staub von den Oberflächen von Werkstücken, wie beispielsweise zu lackierenden Karosserien, abgeblasen werden soll. Diese bekannte Anlage verfügt über eine kanalartige Schleusenkammer, welche an ihren beiden Enden durch ein einlaßseitiges und ein auslaßseitiges Hubtor verschlossen werden kann und in der eine sich über die ganze Länge der Schleusenkammer erstreckende Rollenbahn angeordnet ist, auf der die zu reinigenden Gegenstände abgelegt und mit der die letzteren durch die Schleusenkammer hindurchbewegt werden. Ferner verfügt diese bekannte Anlage über ein Luftkreislaufsystem mit einem Gebläse zum Fördern von Luft zu zwei ringförmigen Blasluftkanälen, welche in Längsrichtung des die Schleusenkammer bildenden Kanals im Abstand voneinander angeordnet sind und deren jeder von vier geraden Segmenten gebildet wird, welche in das Innere des die Schleusenkammer bildenden Kanals hineinragen. Zwischen den beiden Blasluftkanälen ist die Schleusenkammer mit einem gleichfalls ringförmig gestalteten Luftabsaugkanal versehen, dem zwei hintereinander geschaltete mechanische Luftfilter nachgeordnet sind, aus denen das Gebläse die Luft wieder ansaugt. Die zu reinigenden Werkstücke werden mit Hilfe der Rollenbahn durch die Schleusenkammer hindurchgetaktet; hierzu wird zunächst das einlaßseitige Hubtor geöffnet, worauf ein erstes zu reinigendes Werkstück bzw. eine erste Charge zu reinigender Werkstücke in die Schleusenkammer eingeführt und auf der Rollenbahn abgelegt wird. Nach Erreichen einer ersten Position vor dem ersten Blasluftkanal wird das einlaßseitige Hubtor geschlossen, worauf der Luftkreislauf in Betrieb genommen und das Werkstück bzw. die Werkstücke durch den ersten ringförmigen Blasluftkanal hindurchgeführt und vor dem zweiten ringförmigen Blasluftkanal stillgesetzt wird bzw. werden. Anschließend wird das einlaßseitige Hubtor wieder geöffnet, die Schleusenkammer mit der nächsten Charge beladen, das einlaßseitige Hubtor wieder geschlossen und die Rollenbahn um einen Schritt weitergetaktet, wobei die erste Charge den zweiten ringförmigen Blasluftkanal und die zweite Charge den ersten Blasluftkanal passiert etc. Die zu reinigenden Werkstücke müssen also einzeln oder chargenweise in die Schleusenkammer eingebracht werden, d. h. diese bekannte Reinigungsanlage kann nur diskontinuierlich arbeiten; außerdem sind verhältnismäßig aufwendige Werkstück-Handhabungsvorrichtungen erforderlich, um die zu reinigenden Werkstücke durch das geöffnete einlaßseitige Hubtor hindurch auf die Rollenbahn aufzubringen und die gereinigten Werkstücke durch das geöffnete auslaßseitige Hubtor hindurch von der Rollenbahn abzunehmen.DE-A-34 19 028 is already a cleaning system with which dust from the surfaces of workpieces, such as bodies to be painted, blown off shall be. This well-known system has a channel-like lock chamber, which at both ends closed by an inlet-side and an outlet-side lifting gate can be and in which one covers the whole Roller conveyor extending length of the lock chamber arranged on which the objects to be cleaned are placed and with which moves the latter through the lock chamber become. Furthermore, this known system has an air circulation system with a fan for conveying air too two annular blown air ducts, which run in the longitudinal direction of the channel forming the lock chamber at a distance from one another are arranged and each of four straight segments is formed, which is in the interior of the lock chamber protruding channel. Between the two Blown air channels are also the lock chamber with one provided a ring-shaped air extraction duct, the two mechanical air filters connected in series from which the fan sucks in the air again. The workpieces to be cleaned are made using the roller conveyor clocked through the lock chamber; first of all the inlet-side lift gate opened, whereupon a first workpiece to be cleaned or a first batch to be cleaned Workpieces inserted into the lock chamber and on the Roller conveyor is deposited. After reaching a first position in front of the first blowing air duct is the lift gate on the inlet side closed, whereupon the air circuit is put into operation and the workpiece or the workpieces through the first annular Blown air duct passed and before the second annular blown air duct is or will be shut down. Subsequently the lift gate on the inlet side is opened again Load the lock chamber with the next batch, the one on the inlet side Lift gate closed again and the roller conveyor one Step clocked, the first batch the second annular blow air duct and the second batch the first Blown air duct passes etc. The workpieces to be cleaned have to go into the lock chamber individually or in batches be introduced, d. H. this well-known cleaning system can only work discontinuously; are also proportional complex workpiece handling devices required, around the workpieces to be cleaned through the open to apply inlet gate on the roller conveyor and the cleaned workpieces through the open outlet side Remove the lift gate from the roller conveyor.

Eine ähnliche Reinigungsanlage ist aus der DE-A-37 34 200 bekannt, die sich jedoch von der Reinigungsanlage nach der DE-A-34 19 028 dadurch unterscheidet, daß mit einem Hochdruck-Luftstrahl gereinigt wird, erzeugt von einem Hochdruckgebläse.A similar cleaning system is from DE-A-37 34 200 known, which, however, from the cleaning system after the DE-A-34 19 028 differs in that with a high pressure air jet is cleaned, generated by a high pressure blower.

Für viele Anwendungsfälle ist die sich aus der DE-A-34 19 028 ergebende Reinigungsanlage aber deshalb grundsätzlich nicht geeignet, weil es mit Blasluftstrahlen nicht gelingt, angetrockneten oder öligen/fettigen Schmutz, wie er für bearbeitete Werkstücke oft typisch ist, in ausreichendem Maße von solchen Werkstücken zu entfernen. Andererseits hat eine Werkstückreinigung mittels Blasluftstrahlen natürlich die Vorteile, daß die Werkstücke anschließend nicht aufwendig getrocknet werden müssen und daß es auch nicht erforderlich ist, große Mengen einer Reinigungsflüssigkeit zu fördern und immer wieder aufzubereiten, so wie dies beim Tauch- und/oder Spritzreinigen von Werkstücken mittels einer Reinigungsflüssigkeit erforderlich ist.For many applications, it can be found in DE-A-34 19 028 resulting cleaning system, however, in principle not suitable because it cannot be dried with blown air jets or oily / greasy dirt as it worked for Workpieces is often typical, to a sufficient extent to remove such workpieces. On the other hand has a workpiece cleaning the advantages of blowing air jets, of course, that the workpieces are not dried afterwards must be and that it is not necessary is to convey large amounts of a cleaning liquid and reprocess again and again, like this with diving and / or Spray cleaning workpieces using a cleaning liquid is required.

Die vorstehend erwähnten Vor- und Nachteile der Reinigungsanlage nach der DE-A-34 19 028 gelten im wesentlichen auch für die sich aus der DE-A-44 25 765 der Firma Dürr GmbH ergebende, jedoch mit einem Druckluftstrahl arbeitende Reinigungsanlage, die allerdings so ausgebildet ist, daß sie kontinuierlich arbeiten kann und kostengünstiger ist, da sie weder Hubtore, noch aufwendige Werkstück-Handhabungsvorrichtungen benötigt.The advantages and disadvantages of the cleaning system mentioned above according to DE-A-34 19 028 also apply essentially to the result of DE-A-44 25 765 from Dürr GmbH, however cleaning system working with a compressed air jet, which, however, is designed to be continuous can work and is cheaper since it neither lifting gates nor complex workpiece handling devices needed.

Der Erfindung liegt die Aufgabe zugrunde, in einer automatisch arbeitenden Reinigungsanlage die Vorteile einer Reinigung der Werkstücke mittels Luftstrahlen zu nutzen, gleichzeitig aber den Reinigungseffekt deutlich zu verbessern, und zwar auch dann, wenn aus Gründen der Energiekosten mit Blasluftstrahlen und nicht mit hochgespannter Luft gearbeitet wird, obwohl grundsätzlich auch letzteres denkbar wäre.The invention has for its object in an automatic working cleaning system the benefits of cleaning to use the workpieces by means of air jets at the same time but to significantly improve the cleaning effect, and even if, for reasons of energy costs, with blown air jets and not working with high-tension air is, although in principle the latter would also be conceivable.

Grundgedanke der Erfindung ist es nun, einem die Reinigung bewirkenden Luftstrahl eine verhältnismäßig geringe Menge Wasserdampfes so beizufügen, daß der auf ein zu reinigendes Werkstück auftreffende Luftstrahl das Wasser zumindest überwiegend in Dampfform enthält. Es hat sich nämlich gezeigt, daß sich unerwartet gute Reinigungsergebnisse erzielen lassen, wenn statt reiner Luft ein Luft-Wasserdampf-Gemisch auf das zu reinigende Werkstück einwirkt, und zwar selbst dann, wenn der Wasserdampfanteil des Blasluftstrahls verhältnismäßig gering ist. Einerseits lassen sich so Werkstücke sogar gut entfetten, und andererseits trocknen die Werkstücke nach dem Reinigungsvorgang rasch ab, wenn dem Luftstrahl nur die für die Erzielung des Reinigungsvorgangs erforderliche geringe Dampfmenge beigegeben wird.The basic idea of the invention is now the cleaning effecting air jet a relatively small amount Add water vapor so that the one to be cleaned Air jet hitting the workpiece, at least predominantly, the water contains in vapor form. It has been shown that unexpectedly good cleaning results can be achieved if instead of pure air an air-water vapor mixture appears the workpiece to be cleaned acts, even then, if the proportion of water vapor in the blast air jet is proportional is low. On the one hand, workpieces can even be made in this way degrease well, and on the other hand dry the workpieces the cleaning process quickly, if only the air jet low required to achieve the cleaning process Amount of steam is added.

Obwohl der Reinigungsmechanismus nicht bis ins letzte geklärt ist, kommt es offenbar auf die Kombination von das Werkstück anströmender Luft, vorzugsweise Blasluft, und Wasserdampf an, denn mit den bekannten, auf dem Markt angebotenen reinen Dampfstrahlgeräten lassen sich die mit der Erfindung erzielbaren Reinigungsergebnisse nicht erreichen, und insbesondere sind nach einer Reinigung mit einem Dampfstrahlgerät die Werkstücke nicht trocken, so daß in einer Fertigungs- und/oder Montagestraße eine gesonderte Trocknungsstation vorgesehen werden müßte.Although the cleaning mechanism has not been clarified to the last detail it is obviously the combination of the workpiece incoming air, preferably blown air, and water vapor, because with the well-known pure steam jet devices offered on the market the cleaning results achievable with the invention cannot be achieved reach, and especially after cleaning with a steam jet device the workpieces are not dry, so that in a manufacturing and / or Montagestrasse a separate drying station should be provided.

Die vorgenannte Aufgabe wird gemäß der vorliegenden Erfindung durch eine Reinigungsanlage nach Anspruch 1 gelöst. The above object is achieved according to the present invention by a Cleaning system according to claim 1 solved.

Möglicherweise beruht der mit der Erfindung erzielbare gute Reinigungseffekt unter anderem auf der Tatsache, daß bei einer Reinigung mit Wasserdampf voll-entsalztes Wasser bzw. dessen Dampf auf das Werkstück auftrifft und voll-entsalztes Wasser "aggressiver" ist als normales Wasser, d. h. Schmutz leichter aufnimmt als nicht-entsalztes Wasser; gleichzeitig führt die Reinigung mittels Luftstrahlen, welchen verhältnismäßig geringe Mengen von Wasserdampf zugesetzt wurden, aber dazu, daß die gereinigten Werkstücke unmittelbar nach der Reinigung wieder trocken sind bzw. rasch von selbst abtrocknen.The good that can be achieved with the invention may be based Cleaning effect, among other things, on the fact that at a cleaning with steam completely demineralized water or whose steam hits the workpiece and fully desalinated Water is "more aggressive" than normal water, i.e. H. dirt absorbs more easily than non-desalinated water; simultaneously carries out the cleaning by means of air jets, which is proportionate small amounts of water vapor were added, however to ensure that the cleaned workpieces immediately after the Cleaning is dry again or dry quickly by itself.

Obwohl die erfindungsgemäße Reinigung einen sehr guten Reinigungseffekt mit sich bringt, erfolgt sie doch äußerst schonend, so daß z. B. der Lack auf einer lackierten Werkstückoberfläche unbeschädigt bleibt. Auch kann dem für die erfindungsgemäße Reinigung zu verdampfenden Wasser ohne weiteres eine geringe Menge eines Korrosionsschutzmittels beigemischt werden, um so ein Korrodieren der gereinigten Werkstücke zu verhindern.Although the cleaning according to the invention has a very good cleaning effect with it, it is extremely gentle, so that z. B. the paint on a painted workpiece surface remains undamaged. This can also be done for the invention Cleaning water to be evaporated easily a small amount of an anti-corrosion agent is added so as to corrode the cleaned workpieces prevent.

Mit denjenigen Mitteln, mit denen sich in der erfindungsgemäßen Reinigungsanlage das aus dem gebrauchten Wasserdampf entstehende Kondensat aus der Blasluft abscheiden läßt, lassen sich auch von der gebrauchten Blasluft mitgeführte Bearbeitungs- bzw. Behandlungsrückstände von der gebrauchten Blasluft abtrennen, so daß es grundsätzlich möglich ist, die gebrauchte Blasluft in die Umgebung oder ins Freie abzuleiten; außerdem fallen nur vergleichsweise geringe Mengen verunreinigten Kondensats an, welche entsorgt oder wiederaufbereitet werden müssen. With those means with which in the invention Cleaning plant that from the used steam allows the resulting condensate to be separated from the blown air, can also be carried along by the used blowing air Processing or treatment residues from the used Separate blown air so that it is basically possible to to discharge used air into the environment or outside; in addition, only comparatively small amounts of contaminated fall Condensate, which is disposed of or reprocessed Need to become.

Ein weiterer, großer Vorteil der Erfindung ist darin zu sehen, daß sich die erfindungsgemäß vorzusehenden Mittel bei jeder mit Luftstrahlen arbeitenden Reinigungsanlage ohne weiteres nachrüsten lassen.Another great advantage of the invention is that see that the agents to be provided according to the invention any cleaning system working with air jets without have more retrofitted.

Auch läßt sich der von den Werkstücken abgelöste Schmutz aus dem Dampfkondensat leicht entfernen, insbesondere mit einem gebräuchlichen Cyclon-Abscheider, so daß es möglich ist, das gebrauchte Wasser, gegebenenfalls samt Korrosionsschutzmittel, nach einer entsprechenden Aufbereitung wieder einzusetzen, obwohl die für eine erfindungsgemäße Reinigung benötigten geringen Wassermengen ohne weiteres eine wirtschaftliche Entsorgung zulassen.The dirt detached from the workpieces can also be let out remove the steam condensate easily, especially with a common cyclone separator, so that it is possible that used water, including any anti-corrosion agents, reuse after appropriate reprocessing, although those required for cleaning according to the invention small amounts of water easily an economical Allow disposal.

Aus der DE-A-44 40 146 ist eine Vorrichtung zum Reinigen von Gegenständen bekannt geworden, welche umfaßt (a) ein übliches Hochdruckreinigungsgerät mit einem Dampferzeuger zur Erzeugung hochgespannten, heißen Wasserdampfs, (b) einen Luftkompressor zur Erzeugung eines Druckluftstrahls, und (c) eine pistolenartige Sprühlanze, wie sie in Verbindung mit den üblichen Hochdruckreinigungsgeräten verwendet wird, wobei in dieser Sprühlanze der hochgespannte, heiße Wasserdampf und die Druckluft zusammengeführt werden, und zwar kurz vor der Austrittsöffnung der Sprühlanze, und wobei außerdem in den Druckluftstrahl ein körniges Strahlmittel eingebracht wird, ehe der Wasserdampf in den Druckluftstrahl eingeleitet wird. Da es sich bei dieser bekannten Reinigungsvorrichtung um eine sogenannte Strahlvorrichtung handelt, durch die die zu reinigenden Gegenstände mit einem Druckluftstrahl hoher Geschwindigkeit beaufschlagt werden, welcher das körnige Strahlmittel mit sich führt, eignet sich diese bekannte Reinigungsvorrichtung schon aus diesem Grund nicht für eine schonende Werkstückreinigung, die es erlauben würde, sogar lackierte Werkstücke zu reinigen, ohne daß die lackierte Werkstückoberfläche beschädigt wird. Ferner führt ein bekanntes Hochdruckreinigungsgerät mit einem Dampferzeuger dazu, daß bei dieser bekannten Reinigungsvorrichtung der das körnige Strahlmittel mit sich führende Druckluftstrahl einen hohen Anteil an Wasserdampf enthält, so daß die gereinigten Gegenstände nach der Reinigung naß sind und einem separaten Trocknungsvorgang unterworfen werden müßten, würde man diese bekannte Reinigungsvorrichtung in einer Fertigungs- und/oder Montagestraße einsetzen.DE-A-44 40 146 describes a device for cleaning Become known objects, which comprises (a) a common High pressure cleaning device with a steam generator for generation high-tension, hot water vapor, (b) an air compressor to generate a jet of compressed air, and (c) one pistol-like spray lance, as used in connection with the usual high-pressure cleaning devices is used, wherein in this spray lance the high tension, hot steam and the compressed air are brought together, just before the Outlet opening of the spray lance, and also in the A granular abrasive is introduced into the compressed air jet, before the water vapor is introduced into the compressed air jet. Since this known cleaning device is a so-called blasting device acts through which to be cleaned Objects with a high-speed compressed air jet which are the granular abrasive entails, this known cleaning device is suitable for this reason alone not for gentle workpiece cleaning, that would allow even painted workpieces to clean without the painted workpiece surface is damaged. Furthermore, a known high-pressure cleaning device with a steam generator that this known cleaning device of the granular abrasive with the leading compressed air jet a high proportion of water vapor contains, so that the cleaned items after the Cleaning are wet and subjected to a separate drying process would have to be this well-known cleaning device in a production and / or assembly line deploy.

Aus der DE-A-41 22 864 ist eine weitere Reinigungsvorrichtung bekannt geworden, welche mit Wasserdampf arbeitet, und zwar eine Reinigungsvorrichtung zum Reinigen von mit Erde verschmutzten Gegenständen, Mauerwerk, Straßen oder dergleichen, aber auch zum Schälen von Feldfrüchten, wie Kartoffeln, Zuckerrüben und dergleichen. In dieser bekannten Reinigungsvorrichtung soll Luft durch einen Verdichter so stark komprimiert werden, daß die Luft dabei erwärmt wird, worauf der hochverdichteten, warmen oder gar heißen Luft gegebenenfalls eine Flüssigkeit, wie Wasser, zugemischt wird. Der Flüssigkeitsanteil soll dabei so hoch sein, daß, wenn das Luft-Flüssigkeit-Gemisch auf unter 0°C abgekühlt wird, die zu reinigenden Früchte durch gefrorene Flüssigkeitspartikel geschält werden, so wie dies beim Abstrahlen mittels eines körnigen Strahlmittels der Fall wäre. Es liegt also auf der Hand, daß bei dieser bekannten Reinigungsvorrichtung mit einem verhältnismäßig hohen Wasseranteil des Reinigungsstrahls gearbeitet wird. Another cleaning device is known from DE-A-41 22 864 became known, which works with water vapor, namely a cleaning device for cleaning dirt soiled Objects, masonry, streets or the like, but also for peeling field crops such as potatoes and sugar beets and the same. In this known cleaning device is supposed to compress air so strongly by a compressor be that the air is heated, whereupon the Highly compressed, warm or even hot air if necessary a liquid, such as water, is mixed in. The liquid content should be so high that when the air-liquid mixture is cooled to below 0 ° C, the to be cleaned Fruit peeled by frozen liquid particles as is the case with blasting using a granular Abrasive would be the case. So it is obvious that in this known cleaning device with a relatively high water content of the cleaning jet worked becomes.

Aus der GB-A-2 283 906 sind Druckluft-Reinigungssysteme bekannt, bei denen eine Flüssigkeit aus einem Flüssigkeitstank einer Sprühpistole zugeführt wird, um in der Sprühpistole mit Druckluft vermischt zu werden. Die Flüssigkeit wird dabei aus dem Flüssigkeitstank durch Beaufschlagung mit einem erhöhten Druck durch eine Druckleitung in die Sprühpistole gefördert, wobei die geförderte Menge mittels eines Druckreglers eingestellt werden kann. Die zugeführte Flüssigkeit, beispielsweise Wasser, wird dabei in flüssiger Form der Druckluft zugeführt. Bei einer in der GB-A-2 283 906 offenbarten Ausführungsform wird einer Reinigungslanze zusätzlich Dampf aus einem Dampferzeuger zugeführt; dieser Dampf wird der Reinigungslanze durch eine separate Dampfversorgungsleitung zugeführt und tritt aus einer separaten Düse aus, ohne zuvor der durch eigene Düsen austretenden Druckluft zugeführt zu werden.Compressed air cleaning systems are known from GB-A-2 283 906, where a liquid from a liquid tank a spray gun is supplied to in the spray gun with Compressed air to be mixed. The liquid will be out the liquid tank by applying an elevated one Pressure is conveyed through a pressure line into the spray gun, the amount conveyed is set by means of a pressure regulator can be. The supplied liquid, for example Water is supplied to the compressed air in liquid form. In one embodiment disclosed in GB-A-2 283 906 steam is also emitted from a cleaning lance fed to a steam generator; this steam becomes the cleaning lance fed through a separate steam supply line and emerges from a separate nozzle without the Compressed air emerging through its own nozzles become.

Bei der erfindungsgemäßen Reinigungsanlage kann der Dampf dem Luftstrahl stromaufwärts der Blasdüse zugefügt werden, es ist jedoch vorteilhaft, den Dampf möglichst kurz vor oder sogar innerhalb der Blasdüse dem Luftstrahl beizugeben, damit der Dampf möglichst weitgehend in Dampfform auf das zu reinigende Werkstück auftrifft und möglichst geringe Dampfmengen erforderlich sind.In the cleaning system according to the invention, the steam can Air jet is added upstream of the blow nozzle, it is however advantageous to steam as shortly before or even as possible to be added to the air jet within the blow nozzle so that the Steam as much as possible in vapor form on what is to be cleaned Workpiece hits and the smallest possible amount of steam required are.

Da bei der Erfindung nicht mit organischen oder anderen die Umwelt beeinträchtigenden Flüssigkeiten gearbeitet werden muß, ist es nicht erforderlich, einen an seinem Umfang geschlossenen Kanal vorzusehen; der Kanal der erfindungsgemäßen Reinigungsanlage könnte also beispielsweise einen U-förmigen Querschnitt haben und oben offen sein oder nur von zwei in Bewegungsrichtung der Werkstücke parallel zueinander verlaufenden seitlichen Spritzschutzwänden gebildet werden. Bevorzugt werden aber Ausführungsformen, bei denen der Kanal bis auf eine insbesondere verschließbare Einlaß- und Auslaßöffnung für die Werkstücke allseitig geschlossen ist. Solche Ausführungsformen ermöglichen eine weitere Verbesserung der erfindungsgemäßen Reinigungsanlage dergestalt, daß die Blasluft zumindest nahezu vollständig im Kreislauf geführt wird; eine entsprechende Ausführungsform zeichnet sich durch einen den Kanal sowie den Luftförderer, die Blasdüse und die Kondensat-Abscheidevorrichtung beinhaltenden geschlossenen Blasluftkreislauf aus (sieht man einmal davon ab, daß möglicherweise die Einlaß- und Auslaßöffnung des Kanals nicht wirklich absolut gasdicht verschlossen ist, solange das Werkstück bzw. die Werkstücke gereinigt wird bzw. werden). Ein zu hoher Feuchtigkeitsgehalt der im Kreislauf geführten Blasluft wird bei dieser Ausführungsform dadurch vermieden, daß bei entsprechender Gestaltung des Blasluftkreislaufs der der Blasluft beigegebene Dampf stromabwärts der Reinigungsstelle zumindest weitgehendst auskondensiert wird. Since in the invention not with organic or other Environmentally harmful liquids are worked must, it is not necessary to have a closed scope Provide channel; the channel of the invention The cleaning system could, for example, be a U-shaped one Have cross-section and be open at the top or only from two in Direction of movement of the workpieces running parallel to each other lateral splash protection walls are formed. Prefers but are embodiments in which the channel to to a particularly closable inlet and outlet opening is closed on all sides for the workpieces. Such Embodiments allow further improvement of the Cleaning system according to the invention such that the blown air is at least almost completely circulated; a corresponding embodiment is characterized by a the duct and the air conveyor, the blower nozzle and the condensate separator including closed blown air circuit (apart from the fact that possibly not really the inlet and outlet of the channel is absolutely gas-tight as long as the workpiece or the workpieces are being cleaned). Too high Moisture content of the blown air circulated avoided in this embodiment in that with appropriate Design of the blown air circuit that of the blown air added steam downstream of the cleaning point at least is largely condensed out.

Damit der Luftförderer durch den Dampf bzw. das Dampfkondensat und den in diesem enthaltenen Schmutz möglichst wenig beeinträchtigt wird, empfiehlt es sich, die Kondensat-Abscheidevorrichtung stromabwärts des Auslasses des Kanals und stromaufwärts des Luftförderers vorzusehen, und um auch von der eigentlichen Blasluft mitgeführten Schmutz vor dem Luftförderer aus der Blasluft abzuscheiden, wird empfohlen, im Blasluftkreislauf stromabwärts des Auslasses des Kanals und stromaufwärts des Luftförderers auch eine Schmutzabscheidevorrichtung zum Abscheiden von von den Werkstücken entferntem Schmutz aus der Blasluft vorzusehen, wobei es sich bei dieser Schmutzabscheidevorrichtung um ein einfaches mechanisches Filter handeln kann.So that the air conveyor through the steam or steam condensate and impair the dirt contained in it as little as possible it is recommended to use the condensate separator downstream of the outlet of the channel and to provide upstream of the air conveyor, and also from the actual blown air carried dirt in front of the air conveyor It is recommended to separate from the blowing air in the Blow air circuit downstream of the outlet of the duct and also a dirt separator upstream of the air conveyor for separating what has been removed from the workpieces Provide dirt from the blown air, which is this Dirt separator by a simple mechanical Filters can act.

Anders als bei der sich aus der DE-A-34 19 028 ergebenden bekannten Reinigungsanlage, jedoch in Übereinstimmung mit der Reinigungsanlage nach der DE-A-44 25 765 wird für die erfindungsgemäße Reinigungsanlage empfohlen, den Auslaß des Kanals an einem Boden des letzteren vorzusehen, um so dem Umstand Rechnung zu tragen, daß die Wände des Kanals als Prallwände für die von der Blasluft bzw. von der gebrauchten Blasluft mitgeführten Kondensattröpfchen wirken, d. h. als Flüssigkeitsabscheideelemente.Different from that resulting from DE-A-34 19 028 known cleaning system, but in accordance with the Cleaning system according to DE-A-44 25 765 is for the invention Cleaning system recommended, the outlet of the channel to provide on a bottom of the latter so as to To take into account that the walls of the canal as baffle for the blowing air or the used blowing air carried condensate droplets, d. H. as liquid separation elements.

Die Blasluftdüse bzw. mehrere Blasluftdüsen könnten von einem roboterähnlichen Handhabungsgerät gehalten und längs der zu reinigenden Werkstücke und/oder um diese herum bewegt werden; einfacher ist es jedoch, die Blasdüse so zu gestalten, daß sie eine das zu reinigende Werkstück zumindest im wesentlichen umschließende Luftaustrittsöffnung hat und Blasdüse sowie Werkstück relativ zueinander quer zu dieser Luftaustrittsöffnung bewegbar sind, und zwar insbesondere dadurch, daß die Werkstücke durch die Werkstück-Transporteinrichtung durch die Blasdüse hindurchgeführt werden. In diesem Fall ist es besonders vorteilhaft, wenn ein das Werkstück tragender Bereich der Transporteinrichtung quer zur Kanallängsrichtung luftdurchlässig ist, denn dann kann die Blasluft samt dem von ihr mitgeführten Dampf aus allen Richtungen auf die von der Transporteinrichtung getragenen Werkstücke gerichtet werden.The blower air nozzle or several blower air nozzles could be from one robot-like handling device held and along the cleaning workpieces and / or moved around them; however, it is easier to design the blow nozzle so that they at least essentially the workpiece to be cleaned has surrounding air outlet opening and blow nozzle as well Workpiece relative to one another transversely to this air outlet opening are movable, in particular by that the workpieces through the workpiece transport device be passed through the blow nozzle. In this case it is particularly advantageous if a workpiece carrier Area of the transport device transverse to the longitudinal direction of the channel is permeable to air, because then the blown air together with that of your carried steam from all directions to that of the Transport device to be carried workpieces.

Wie sich bereits aus den obigen Ausführungen ergibt, werden Ausführungsformen bevorzugt, bei denen der Luftförderer die Blasluft nicht unter hohem Druck zur Blasdüse fördert, da dadurch der Energiebedarf der Reinigungsanlage minimiert wird. In diesem Fall lassen sich sehr gute Reinigungsergebnisse dann erzielen, wenn der Luftförderer derart ausgelegt ist, daß er je Blasdüse mindestens ca. 600 m3/h an Blasluft fördert.As can already be seen from the above, embodiments are preferred in which the air conveyor does not convey the blown air to the blower nozzle under high pressure, since the energy requirement of the cleaning system is thereby minimized. In this case, very good cleaning results can be achieved if the air conveyor is designed in such a way that it delivers at least about 600 m 3 / h of blown air per blowing nozzle.

Für die meisten Anwendungsfälle hat es sich als ausreichend erwiesen, wenn der Blasluft je Blasdüse ungefähr 3 bis ungefähr 15 kg/h an Wasserdampf beigefügt werden. Bei einer bevorzugten Ausführungsform der erfindungsgemäßen Reinigungsanlage wird der Dampf durch einen Dampferzeuger geliefert, der so ausgelegt ist, daß der Wasserdampf einen Druck von ungefähr 0,5 bis 8 bar und eine Temperatur von ungefähr 110°C bis 200°C aufweist. Wenn dem zu verdampfenden Wasser ein Korrosionsschutzmittel zugesetzt werden soll, ist es völlig ausreichend, wenn das Wasser maximal 0,5 Vol.%, vorzugsweise nur 0,1 bis 0,2 Vol.% des Korrosionsschutzmittels enthält.For most applications, it has been found to be sufficient proven when the blowing air per blowing nozzle is approximately 3 to approximately 15 kg / h of steam can be added. In a preferred one Embodiment of the cleaning system according to the invention the steam is supplied by a steam generator which is designed so that the water vapor has a pressure of approximately 0.5 to 8 bar and a temperature of approximately 110 ° C to 200 ° C. If the water to be evaporated is an anti-corrosion agent should be added, it is completely sufficient if the water is at most 0.5 vol.%, preferably only Contains 0.1 to 0.2% by volume of the anti-corrosion agent.

Das Beifügen verhältnismäßig geringer Dampfmengen zur Blasluft ermöglicht es, die Blasluft der Blasdüse mit einem vergleichsweise sehr geringen Überdruck zuzuführen, so daß bei bevorzugten Ausführungsformen der erfindungsgemäßen Reinigungsanlage der Luftförderer derart ausgebildet ist, daß die Luft der Blasdüse mit einem Druck von höchstens ungefähr 0,3 bar, vorzugsweise von nur ungefähr 0,2 bar zugeführt wird.The addition of relatively small amounts of steam to the blown air allows the blowing air of the blowing nozzle with a comparatively to supply very little overpressure, so that at preferred embodiments of the cleaning system according to the invention the air conveyor is designed such that the Air of the blow nozzle with a pressure of at most approximately 0.3 bar, preferably supplied by only about 0.2 bar becomes.

Besonders gute Reinigungsergebnisse lassen sich dann erzielen, wenn Luftförderer und Blasdüse sowie Dampfzufuhrvorrichtung so ausgebildet sind, daß die Austrittsgeschwindigkeit des Luft-Dampf-Gemischs an der Blasdüse ungefähr 100 bis 300 m/sec beträgt.Particularly good cleaning results can then be achieved if air conveyor and blowing nozzle as well as steam supply device are designed so that the exit speed the air-steam mixture at the blow nozzle about 100 to Is 300 m / sec.

Damit der der Blasluft beigegebene Wasserdampf auch tatsächlich weitgehendst in Dampfform auf das zu reinigende Werkstück auftrifft, empfehlen sich Ausführungsformen, bei denen der Wasserdampf ungefähr 2 bis 20 cm vor der Austrittsöffnung der Blasdüse in den Blasluftstrahl eingeleitet wird - in Abhängigkeit von der Konstruktion der Blasdüse sollte der Wasserdampf möglichst kurz vor der Düsenaustrittsöffnung dem Luftstrahl beigegeben, jedoch stets vor der Blasdüse entspannt werden.So that the water vapor added to the blowing air actually does largely in vapor form on the workpiece to be cleaned strikes, embodiments are recommended in which the water vapor approximately 2 to 20 cm before the outlet opening the blowing nozzle is introduced into the blowing air jet - depending on from the construction of the blow nozzle should the water vapor as short as possible before the nozzle outlet opening Air jet added, but always relaxed in front of the blow nozzle become.

Des weiteren empfiehlt es sich, den Abstand der Austrittsöffnung der Blasdüse von dem zu reinigenden Werkstück möglichst klein zu wählen, weshalb bei bevorzugten Ausführungsformen der erfindungsgemäßen Reinigungsanlage dieser Abstand, auch in Abhängigkeit von den Konturen der zu reinigenden Werkstücke, ungefähr 0,1 bis 5 cm beträgt.Furthermore, it is recommended that the distance between the outlet opening the blow nozzle of the workpiece to be cleaned if possible to choose small, which is why in preferred embodiments the cleaning system according to the invention this distance, too depending on the contours of the workpieces to be cleaned, is about 0.1 to 5 cm.

Die der Blasluft je Zeiteinheit zuzuführende Dampfmenge kann über die dem Dampferzeuger zugeführte Energie gesteuert werden; es kann sich aber empfehlen, das Wasser dem Dampferzeuger mittels einer Dosierpumpe zuzuführen, und zwar vorzugsweise mittels einer bezüglich ihrer Förderrate einstellbaren Dosierpumpe. The amount of steam to be supplied to the blown air per unit of time can are controlled by the energy supplied to the steam generator; but it may be advisable to use the water to the steam generator by means of a metering pump, preferably by means of an adjustable with regard to their delivery rate Metering pump.

Weitere Merkmale, Vorteile und Einzelheiten der Erfindung ergeben sich aus den beigefügten Ansprüchen und/oder aus der nachfolgenden Beschreibung sowie der beigefügten zeichnerischen Darstellung einer besonders vorteilhaften Ausführungsform der erfindungsgemäßen Reinigungsanlage; in der Zeichnung zeigen:

Fig. 1
eine schematische Darstellung der Reinigungsanlage, und
Fig. 2
den in Fig. 1 mit "A" gekennzeichneten Ausschnitt im Detail und größerem Maßstab.
Further features, advantages and details of the invention result from the appended claims and / or from the following description and the attached drawing of a particularly advantageous embodiment of the cleaning system according to the invention; show in the drawing:
Fig. 1
a schematic representation of the cleaning system, and
Fig. 2
the section marked with "A" in Fig. 1 in detail and on a larger scale.

Die in Fig. 1 als Ganzes dargestellte Reinigungsanlage besitzt einen Kanal 10, welcher an seinem Umfang - sieht man einmal von im folgenden noch beschriebenen Öffnungen ab - überall geschlossen, an seinen beiden Stirnseiten jedoch offen ist; die gemäß Fig. 1 linke Stirnseite bildet so eine Einlaß-/Auslaßöffnung 12 für die zu reinigenden Werkstücke. Ungefähr in seiner Mitte wird der Kanal 10 von einer ringförmigen Blasdüse 14 umfaßt, welche eine durch Pfeile veranschaulichte, gleichfalls ringförmige Düsenöffnung 16 besitzt - an dieser Stelle hat die Wand des Kanals 10 einen ringförmigen Schlitz; vorzugsweise ragt die Blasdüse 14 also nicht in das Innere des Kanals 10 hinein, und sie ist insbesondere so ausgebildet, wie dies in der DE-A-44 25 765 beschrieben und dargestellt wurde. Wie in Fig. 1 durch die Pfeile angedeutet wurde, ist die Düsenöffnung 16 so orientiert, daß die Blasdüse 14 einen ringförmigen Blasluftstrahl erzeugt, welcher in das Innere des Kanals 10 hinein gerichtet und etwas in Richtung auf die Einlaß-/Auslaßöffnung 12 geneigt ist. The cleaning system shown as a whole in Fig. 1 has a channel 10, which on its circumference - you can see once from openings described below - closed everywhere, but on both ends is open; the left end according to FIG. 1 thus forms one Inlet / outlet opening 12 for the workpieces to be cleaned. Approximately in the middle of the channel 10 is an annular Blowing nozzle 14 comprises, which is illustrated by an arrow, likewise has annular nozzle opening 16 - At this point, the wall of the channel 10 has an annular shape Slot; preferably the blowing nozzle 14 does not protrude inside the channel 10 and it is special trained as described in DE-A-44 25 765 and was shown. As indicated in Fig. 1 by the arrows was, the nozzle opening 16 is oriented so that the Blower nozzle 14 generates an annular jet of blown air, which directed into the interior of the channel 10 and something is inclined towards the inlet / outlet opening 12.

Gemäß Fig. 1 links von der Blasdüse 14 wird der Boden des Kanals 10 von einem Absaugtrichter 18 gebildet, während im übrigen der Innenquerschnitt des Kanals 10 über dessen ganze Länge konstant ist.1 to the left of the blowing nozzle 14, the bottom of the Channel 10 formed by a suction funnel 18, while in remaining the inner cross section of the channel 10 over the whole Length is constant.

Der Einlaß-/Auslaßöffnung 12 ist eine Werkstück-Transporteinrichtung zugeordnet, mit der sich ein zu reinigendes Werkstück 20 durch die Einlaß-/Auslaßöffnung hindurch in den Kanal 10 einbringen, durch die Düsenöffnung 16 hindurchschieben und dann wieder aus dem Kanal 10 herausziehen läßt; diese Werkstück-Transporteinrichtung umfaßt eine sich in Längsrichtung des Kanals 10 erstreckende Schieberstange 22, welche durch nicht dargestellte Mittel gehalten und in Längsrichtung des Kanals 10 hin- und hergeschoben werden kann, sowie einen von der Schieberstange 22 gehaltenen Werkstückträger 24, an dessen beiden Enden jeweils ein Schott 26 bzw. 28 befestigt ist. Der Werkstückträger 24 bildet eine in vertikaler Richtung luftdurchlässig gestaltete Auflage für ein zu reinigendes Werkstück 20, während die beiden Schotten 26 und 28 luftundurchlässig sind und - sieht man einmal vom Bereich des Absaugtrichters 18 ab - abdichtend an der Innenwand des Kanals 10 entlanggleiten können. Erfindungsgemäß ist der Werkstückträger 24 so lang gestaltet, daß nach dem Einbringen eines zu reinigenden Werkstücks 20 in den Kanal 10 in der in Fig. 1 dargestellten Ausgangsstellung des Werkstückträgers für den Reinigungsvorgang das Schott 28 etwas hinter, d. h. gemäß Fig. 1 rechts von der Düsenöffnung 16 liegt, während sich das Schott 26 ungefähr an dem gemäß Fig. 1 linken Ende des Absaugtrichters 18 befindet.The inlet / outlet opening 12 is a workpiece transport device assigned with which a workpiece to be cleaned 20 through the inlet / outlet opening into the Insert channel 10, push it through the nozzle opening 16 and then pull it out of the channel 10 again; this Workpiece transport device includes one in the longitudinal direction of the channel 10 extending slide rod 22, which held by means not shown and in the longitudinal direction of the channel 10 can be pushed back and forth, as well as a workpiece carrier 24 held by the slide rod 22 a bulkhead 26 and 28 are attached to both ends thereof is. The workpiece carrier 24 forms one in the vertical direction air-permeable support for one to be cleaned Workpiece 20, while the two bulkheads 26 and 28 are impermeable to air and - if you look at the area of the Suction funnel 18 - sealing on the inner wall of the Can slide along 10. According to the Workpiece carrier 24 designed so long that after insertion of a workpiece 20 to be cleaned in the channel 10 in the in Fig. 1 shown starting position of the workpiece carrier for the cleaning process the bulkhead 28 somewhat behind, d. H. 1 is to the right of the nozzle opening 16, while the bulkhead 26 is approximately at the left end according to FIG. 1 the suction funnel 18 is located.

Der Kanal 10 samt Blasdüse 14 ist Bestandteil eines zumindest im wesentlichen geschlossenen Blasluft-Kreislaufes 30, dessen Teile im folgenden beschrieben werden sollen: The channel 10 together with the blowing nozzle 14 is at least one component essentially closed blowing air circuit 30, the Parts to be described below:

Am Boden des Absaugtrichters 18 befindet sich eine nicht näher dargestellte Auslaßöffnung, an welche eine erste Absaugleitung 32 angeschlossen ist; diese führt zu einer tonnenförmigen Abscheidevorrichtung 34, die an ihrer Oberseite eine nicht näher dargestellte Auslaßöffnung besitzt, an welche eine zweite Absaugleitung 36 angeschlossen ist. Letztere verbindet die Abscheidevorrichtung 34 mit der Saugseite eines Blasluftventilators 38, an dessen Auslaß eine Blasluftleitung 40 angeschlossen ist. Durch diese wird die vom Ventilator 38 geförderte Blasluft der Blasdüse 14 zugeführt.There is no one at the bottom of the suction funnel 18 Outlet opening shown, to which a first suction line 32 is connected; this leads to a barrel-shaped separator 34 on its top has an outlet opening, not shown which a second suction line 36 is connected. Latter connects the separator 34 to the suction side a blown air fan 38, at the outlet of which a blown air line 40 is connected. Through this the fan 38 delivered blown air to the blowing nozzle 14.

Eine im Reinigungsprozeß einzusetzende Reinigungsflüssigkeit, also Wasser oder Wasser mit zugesetztem Korrosionsschutzmittel, wird in einem Reinigungsflüssigkeitstank 42 bevorratet; aus diesem wird mittels einer Dosierpumpe 44 und einer Saugleitung 46 Reinigungsflüssigkeit abgesaugt und in eine Druckleitung 48 gefördert, welche einen hinsichtlich seiner Leistung insbesondere einstellbaren Dampferzeuger 50 enthält. Wie die Fig. 2 zeigt, ist die Druckleitung 48 abgedichtet in die Blasluftleitung 40 hineingeführt und endet dort in einer Düse 51, mit deren Hilfe der Dampf kurz vor der Blasdüse 14 in den Blasluftstrom eingeblasen und entspannt wird. Das Einblasen des Dampfs etwas stromaufwärts der ringförmigen Blasdüse 14 hat den Vorteil, daß man mit einer einzigen Düse 51 auskommt und nicht mehrere, über den Umfang der Blasdüse 14 verteilt angeordnete Düsen benötigt.A cleaning liquid to be used in the cleaning process, i.e. water or water with added anti-corrosion agent, is stored in a cleaning liquid tank 42; this is by means of a metering pump 44 and a suction line 46 cleaning liquid is sucked off and into a Pressure line 48 promoted, which one with regard to its Power contains in particular adjustable steam generator 50. As shown in FIG. 2, the pressure line 48 is sealed in the blown air line 40 is introduced and ends there in one Nozzle 51, with the aid of which the steam shortly before the blowing nozzle 14 is blown into the blown air stream and expanded. The The steam is injected slightly upstream of the annular Blowing nozzle 14 has the advantage that you can with a single nozzle 51 needs and not more than the circumference of the blow nozzle 14 distributed nozzles required.

Die Abscheidevorrichtung 34 enthält ungefähr in halber Höhe einen Zyklonabscheider 60, der von an sich bekannter Konstruktion sein kann und deshalb nicht im einzelnen beschrieben und zeichnerisch dargestellt werden muß. Er dient dazu, aus dem durch den Ventilator 38 über die Absaugleitung 32 aus dem Kanal 10 abgesaugten Blasluftstrom Dampfkondensat- sowie gegebenenfalls Korrosionsschutzmitteltröpfchen sowie Schmutz, welcher von dem gereinigten Werkstück entfernt wurde, abzuscheiden, und zwar mit Hilfe von Zentrifugalkräften, die dadurch erzeugt werden, daß die zu reinigende Blasluft im Zyklonabscheider 60 einen Wirbel bildet, und zwar unterhalb einer ungefähr trichterförmigen Zwischenwand 62 der Abscheidevorrichtung 34. Von dem gereinigten Werkstück stammender Feststoffpartikel-Schmutz 64 sedimentiert dann am Boden der Abscheidevorrichtung 34, während sich z. B. durch Schneidöle verschmutztes Kondensat 66 über dem Feststoffpartikel-Schmutz 64 in der Abscheidevorrichtung 34 absetzt. Die durch den Zyklonabscheider 60 gereinigte Blasluft tritt durch eine Öffnung im Zentrum der Zwischenwand 62 in den oberen Teil der Abscheidevorrichtung 34 ein und passiert dort auswechselbar angebrachte Filterkerzen 70, worauf die so weiter gereinigte Blasluft in die Absaugleitung 36 gelangt.The separator 34 contains approximately half the height a cyclone separator 60, which is of known construction can be and therefore not described in detail and must be shown graphically. It serves from through the fan 38 via the suction line 32 the duct 10 sucked blown air stream steam condensate and if necessary, anti-corrosive droplets and dirt, which has been removed from the cleaned workpiece, with the help of centrifugal forces generated that the blown air to be cleaned in Cyclone separator 60 forms a vortex, below an approximately funnel-shaped partition 62 of the separator 34. From the cleaned workpiece Solid particle dirt 64 then sediments at the bottom of the Separator 34 while z. B. by cutting oils contaminated condensate 66 over the solid particle dirt 64 settles in the separator 34. The through the Cyclone separator 60 cleaned blowing air passes through a Opening in the center of the partition 62 in the upper part of the Separation device 34 and passes there interchangeably attached filter candles 70, whereupon the so cleaned Blown air enters the suction line 36.

Etwas oberhalb des sedimentierten Feststoffpartikel-Schmutzes 64 wird das verschmutzte Kondensat 66 aus der Abscheidevorrichtung 34 abgezogen, und zwar mittels einer Ablaßleitung 72, welche vorzugsweise ein Ventil 74 enthält. Die Ablaßleitung 72 führt zu einer nur schematisch dargestellten Aufbereitungsvorrichtung 76, in der in an sich bekannter Weise Fette, Öle oder andere ähnliche Verschmutzungen vom Kondensat abgetrennt werden und die auch eine Pumpe enthalten soll, mit der das gereinigte Kondensat zurück in den Reinigungsflüssigkeitstank 42 gefördert wird.Somewhat above the sedimented solid particle dirt 64 the contaminated condensate 66 is removed from the separator 34 deducted, by means of a drain line 72, which preferably contains a valve 74. The drain pipe 72 leads to a processing device shown only schematically 76, in a manner known per se Greases, oils or other similar contaminants from the condensate be separated and which should also contain a pump with the cleaned condensate back into the cleaning liquid tank 42 is funded.

Natürlich kann der Werkstückträger 24 statt mit einem einzigen, in Fig. 1 dargestellten Werkstück 20 auch mit mehreren, zu reinigenden Werkstücken beladen werden. Of course, the workpiece carrier 24 can be replaced with a single, 1 workpiece 20 also shown with several, to be loaded for cleaning workpieces.

Nachdem der Werkstückträger 24 mit dem zu reinigenden Werkstück in den Kanal 10 eingeführt wurde und seine in Fig. 1 dargestellte Ausgangsstellung eingenommen hat, werden der Ventilator 38, die Dosierpumpe 44 und der Dampferzeuger 50 eingeschaltet und der Werkstückträger 24 langsam gemäß Fig. 1 von links nach rechts bewegt, bis alle Bereiche des zu reinigenden Werkstücks die ringförmige Düsenöffnung 16 passiert haben; hierauf wird der Werkstückträger 24 gemäß Fig. 1 von rechts nach links in seine in Fig. 1 dargestellte Ausgangsstellung zurückgezogen und dann samt dem gereinigten Werkstück aus dem Kanal 10 nach links herausgezogen.After the workpiece carrier 24 with the workpiece to be cleaned was introduced into the channel 10 and its in Fig. 1st has assumed the starting position shown, the Fan 38, the metering pump 44 and the steam generator 50 switched on and the workpiece carrier 24 slowly according to FIG. 1 moved from left to right until all areas of the to be cleaned Workpiece passes the annular nozzle opening 16 to have; thereupon the workpiece carrier 24 according to FIG right to left in its starting position shown in Fig. 1 withdrawn and then together with the cleaned workpiece pulled out of channel 10 to the left.

Damit trotz des Absaugtrichters 18 Blasluft und Schmutz nicht aus dem Inneren des Kanals 10 austreten können, kann die Schieberstange 22 durch einen doppelt wirkenden und in horizontaler Richtung verschiebbaren Druckmittelzylinder ersetzt werden, welcher über eine den Werkstückträger 24 haltende Kolbenstange verfügt und außerdem mit einem Schott versehen ist, welches nach dem Einschieben des Werkstückträgers 24 in den Kanal 10 dessen gemäß Fig. 1 linkes Ende luftdicht verschließt - wegen des Schotts 28 kann während des Reinigungsvorgangs weder Blasluft, noch Schmutz aus dem rechten offenen Ende des Kanals 10 austreten.So despite the suction funnel 18, there is no blowing air and dirt can escape from the interior of the channel 10, the Slide rod 22 by a double-acting and horizontal Replaceable pressure medium cylinder replaced be, which over a holding the workpiece carrier 24 Piston rod has and also provided with a bulkhead is, which after inserting the workpiece carrier 24 in closes the duct 10 whose left end according to FIG. 1 is airtight - Because of the bulkhead 28 can during the cleaning process neither blowing air, nor dirt from the right open Exit end of channel 10.

Wie bereits erwähnt, könnten der Kanal und die Werkstück-Transporteinrichtung aber auch so ausgebildet sein, wie dies in der DE-A-44 25 765 beschrieben und/oder beansprucht wurde.As already mentioned, the channel and the workpiece transport device could but also be trained like this was described and / or claimed in DE-A-44 25 765.

Um mit der erfindungsgemäßen Reinigungsanlage absolut trockene Werkstücke zu erhalten, kann sich noch eine Abwandlung der dargestellten Ausführungsform empfehlen, welche zwischen dem Dampferzeuger 50 und der Austrittsöffnung der Düse 51 ein Dampfventil enthält, um so die Dampfzufuhr zur Blasluft kurz vor Beendigung des Reinigungsvorgangs beenden zu können - die weitere Beaufschlagung des Werkstücks nur mit Blasluft führt dann zu einer absolut vollständigen und sicheren Trocknung der gereinigten Werkstücke.To absolutely with the cleaning system according to the invention Getting dry workpieces can still be a variation recommend the illustrated embodiment, which between the steam generator 50 and the outlet opening of the nozzle 51 includes a steam valve so as to supply steam to the blown air Stop shortly before the cleaning process ends can - the further loading of the workpiece only with Blown air then leads to an absolutely complete and safe Drying the cleaned workpieces.

Claims (26)

  1. Cleaning installation for removing treatment and/or machining residues from workpieces (10), having a cleaning station, with which a channel (10) for receiving at least one workpiece (20) to be cleaned is associated, having a workpiece transport device (22, 24) for introducing the workpieces to be cleaned into the channel (10) as well as for removing the cleaned workpieces (20) from the channel (10), and having at least one blast nozzle (14), which is directed into the channel interior and hence towards the workpieces (20) to be cleaned, for acting upon the workpieces (20) with a blast air jet, upstream of which blast nozzle is disposed an air conveyor (38) for supplying air to the blast nozzle (14) at a pressure of at most approximately 0.5 bar, and wherein the channel (10) is provided with an outlet for discharging the used blast air,
    characterized in that there are provided a steam supply apparatus for introducing steam into the blast air jet upstream of the blast nozzle (14) or inside the blast nozzle (14) as well as a separating apparatus (34) for separating from the used blast air fouled condensation product arising from the steam, wherein the steam supply apparatus and the air conveyor (38) are matched to one another in such a way that the blast air jet at the blast nozzle (14) contains at most approximately 25 g of steam per m3 of air, and wherein the steam supply apparatus comprises a pressure line (48), which is introduced in a sealed manner into a blast air line (40) and terminates in a nozzle (51), with the aid of which the steam is injected into the blast air stream.
  2. Installation according to claim 1, characterized in that the channel (10) is closed on all sides apart from an, in particular, closable inlet and outlet opening (12) for the workpieces (20).
  3. Installation according to claim 2, characterized by a closed blast air circuit, which comprises the channel (10) as well as the air conveyor (38), the blast nozzle (14) and the condensation product separating apparatus (34).
  4. Installation according to claim 3, characterized in that the condensation product separating apparatus (34) is disposed downstream of the outlet of the channel (10) and upstream of the air conveyor (38).
  5. Installation according to claim 3 or 4, characterized in that downstream of the outlet of the channel (10) and upstream of the air conveyor (38) the blast air circuit comprises a dirt separating apparatus, by means of which dirt removed from the workpieces (20) is separated from the blast air.
  6. Installation according to claim 5, characterized in that the dirt separating apparatus comprises a mechanical filter (70).
  7. Installation according to claim 5 or 6, characterized in that the dirt separating apparatus also forms the condensation product separating apparatus (34).
  8. Installation according to claims 6 and 7, characterized in that the separating apparatus (34) comprises a container having a bottom collecting region for condensation product and dirt, that the filter (70) is disposed in the container above the collecting region, and that a container inlet for the blast air/steam condensation product mixture is disposed between collecting region and filter (70) and a container outlet for blast air is disposed at the side of the filter (70) remote from the collecting region.
  9. Installation according to one or more of the preceding claims, characterized in that the outlet of the channel (10) is disposed on a base of the latter.
  10. Installation according to one or more of the preceding claims, characterized in that the blast nozzle (14) has an air outlet opening (16), which at least substantially surrounds the workpiece (20) to be cleaned, and blast nozzle (14) and workpiece (20) are movable relative to one another transversely of said air outlet opening (16).
  11. Installation according to one or more of the preceding claims, characterized in that the workpiece transport device comprises a continuous conveying element, which extends through the channel.
  12. Installation according to claims 10 or 11, characterized in that the transport device is movable through the air outlet opening (16) of the blast nozzle (14).
  13. Installation according to claim 11 or 12, characterized in that the region of the transport device carrying the workpiece (20) is air-permeable transversely of the channel longitudinal direction.
  14. Installation according to one or more of the preceding claims, characterized in that the air conveyor (38) is designed in such a way that it delivers at least approximately 500 to 600 m3/h per blast nozzle (14).
  15. Installation according to one or more of the preceding claims, characterized in that the steam supply apparatus comprises a steam generator (50) for injecting the steam into the blast air jet.
  16. Installation according to claim 15, characterized in that the steam generator (50) is designed to generate a steam quantity of approximately 1 to approximately 15 kg/h per blast nozzle (14).
  17. Installation according to claim 16, characterized in that the steam generator (50) is designed to generate steam at a pressure of approximately 0.5 to 8 bar and at a temperature of approximately 110°C to 200°C.
  18. Installation according to one or more of the preceding claims, characterized in that the steam supply apparatus is designed to evaporate water, which contains up to approximately 0.5 % by volume, preferably 0.1 to 0.2 % by volume of an anti-corrosive agent.
  19. Installation according to one or more of the preceding claims, characterized in that the air conveyor (38) is designed in such a way that the air is supplied to the blast nozzle (14) at a pressure of at most approximately 0.3 bar, preferably of approximately 0.2 bar.
  20. Installation according to one or more of the preceding claims, characterized in that a steam condensation product return system is provided with a recovery apparatus (76) for the condensation product.
  21. Installation according to one or more of the preceding claims, characterized in that the steam supply apparatus and the blast nozzle (14) are designed in such a way that the speed, at which the air-steam mixture leaves the blast nozzle (14), is approximately 100 to 300 m/sec.
  22. Installation according to one or more of the preceding claims, characterized in that the steam is introduced into the blast air jet and depressurized approximately 2 to 20 cm upstream of the outlet opening of the blast nozzle (14).
  23. Installation according to one or more of the preceding claims, characterized in that the distance of the outlet opening of the blast nozzle (14) from the workpiece (20) to be cleaned is approximately 0.1 to 5 cm.
  24. Installation according to one or more of claims 15 to 23, characterized by a dosing pump (44) for supplying the steam generator (50) with water.
  25. Installation according to claim 24, characterized by a dosing pump (44) having an adjustable delivery rate.
  26. Installation according to one or more of the preceding claims, characterized in that the air conveyor (38) is a fan.
EP97115224A 1996-09-12 1997-09-03 Automatic installation for cleaning workpieces Expired - Lifetime EP0829313B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19637086A DE19637086C2 (en) 1996-09-12 1996-09-12 Automatically working cleaning system for workpieces
DE19637086 1996-09-12

Publications (3)

Publication Number Publication Date
EP0829313A2 EP0829313A2 (en) 1998-03-18
EP0829313A3 EP0829313A3 (en) 1998-06-24
EP0829313B1 true EP0829313B1 (en) 2003-05-14

Family

ID=7805377

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97115224A Expired - Lifetime EP0829313B1 (en) 1996-09-12 1997-09-03 Automatic installation for cleaning workpieces

Country Status (4)

Country Link
US (1) US6119365A (en)
EP (1) EP0829313B1 (en)
DE (1) DE19637086C2 (en)
ES (1) ES2193306T3 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10122992C1 (en) * 2001-05-11 2002-08-08 Ukm Umformtechnik Und Kraftfah Device for de-oiling mass parts with a structured surface using a compressed air jet
US7146991B2 (en) 2002-01-23 2006-12-12 Cinetic Automation Corporation Parts washer system
DE10249425A1 (en) * 2002-10-23 2004-05-13 FITR-Gesellschaft für Innovation im Tief- und Rohrleitungsbau Weimar mbH Method for cutting mineral bonded materials using a fluid jet with or without abrasive additive to remove the binder in the cutting zone and thereby leave an open surface for bonding to a replacement layer
US7338565B2 (en) * 2003-08-21 2008-03-04 Cinetic Automation Corporation Housingless washer
US7353832B2 (en) * 2003-08-21 2008-04-08 Cinetic Automation Corporation Housingless washer
JP4786351B2 (en) * 2006-01-20 2011-10-05 株式会社東芝 Processing apparatus and processing method
AT9203U1 (en) * 2006-04-06 2007-06-15 Econ Maschb Und Steuerungstech DRYING DEVICE
DE102007016673A1 (en) * 2007-04-04 2008-10-09 Rieter Automatik Gmbh Apparatus and method for dewatering and drying a mixture of plastic granules and water
DE102014101123B4 (en) * 2014-01-30 2022-10-20 Elwema Automotive Gmbh Method and system for cleaning a metal workpiece after machining with minimum quantity lubrication
US10431447B2 (en) * 2014-09-30 2019-10-01 Hemlock Semiconductor Corporation Polysilicon chip reclamation assembly and method of reclaiming polysilicon chips from a polysilicon cleaning apparatus
DE102017008032A1 (en) 2017-08-24 2019-02-28 Audi Ag machine tool
CN113865317B (en) * 2021-09-17 2022-09-27 温州市万荣电镀有限公司 Cleaning and drying device for electroplated parts

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3419028A1 (en) * 1984-04-05 1985-11-21 Kessler & Luch Gmbh, 6300 Giessen METHOD FOR CLEANING BODIES WITH AIR JETS AND DEVICE FOR CARRYING OUT THE METHOD
DE3734200A1 (en) * 1987-10-09 1989-04-27 Kliro Bau Gmbh & Co Kg Process and device for removing adhering lubricant from workpieces
DE4122864C2 (en) * 1991-07-11 2003-06-12 Dietrich Martina Process and device for cleaning and peeling fruit
GB9324084D0 (en) * 1993-11-23 1994-01-12 Geraghty James F Cleaning system
DE4425765C2 (en) * 1994-07-21 1999-01-07 Duerr Systems Gmbh System for cleaning workpieces using a compressed air jet
DE4440146C2 (en) * 1994-11-10 1999-07-22 Kaercher Gmbh & Co Alfred Blasting device for cleaning objects
DE19544074C2 (en) * 1995-11-25 1999-01-14 Duerr Systems Gmbh Automatically working cleaning system for workpieces

Also Published As

Publication number Publication date
ES2193306T3 (en) 2003-11-01
DE19637086A1 (en) 1998-03-19
US6119365A (en) 2000-09-19
EP0829313A3 (en) 1998-06-24
DE19637086C2 (en) 1999-06-24
EP0829313A2 (en) 1998-03-18

Similar Documents

Publication Publication Date Title
EP0693325B1 (en) Method and apparatus for cleaning workpieces using air under pressure
DE3937221C2 (en)
EP0829313B1 (en) Automatic installation for cleaning workpieces
DE19544074C2 (en) Automatically working cleaning system for workpieces
EP0634229A1 (en) Method, assembly and apparatus for internal cleaning and coating of pipelines
DE1285926B (en) Device for separating paint particles from the washing liquid of a paint spray channel
DE2924703A1 (en) METHOD AND DEVICE FOR DEBANDING METAL WIRE
DE2810319A1 (en) METHOD AND DEVICE FOR MECHANICAL DESCENTRATION OF METAL WIRE
DE19508488C3 (en) Method and device for generating landfill-capable or further-processable combustion residues from a waste incineration plant
EP2601465B1 (en) Use of a device for drying workpieces after a cleaning operation
DE2240265A1 (en) PLANT FOR THE PRECIPITATION OF PROTECTIVE POWDER IN THE SPRAY PROCESS
EP0486711B1 (en) Apparatus for blowing off a liquid from an article
EP1312419B1 (en) Apparatus and method for cleaning floor gratings in paint booths
DE2417580A1 (en) METHOD AND DEVICE FOR DIRECTING A JET OF LIQUID, CONTAINING SOLID ABRASION PARTICLES, ON THE SURFACE OF A WORKPIECE
DE10359832B4 (en) Method and device for discharging excess spray medium
DE10216685A1 (en) Cleaning device for metal sheets etc. carried on conveyors consists of steam applicator, nozzle unit, and suction device connected to dirt collection chamber, for simple low-energy cleaning
DE19701010A1 (en) Pipeline interior cleaning by pressurised medium
EP0635317B1 (en) Apparatus for washing and/or heat-treating workpieces, in particular profile strips
DE10122992C1 (en) Device for de-oiling mass parts with a structured surface using a compressed air jet
EP0476464B1 (en) Process and apparatus for separating gas carried particles soluble in liquids
EP0527543B1 (en) Process and device for cleaning filtering bands
EP1386652B1 (en) Device for cleaning tube filters and a transport container with this device
DE7027789U (en) DEVICE FOR DEBURRING.
DE10320476B4 (en) Apparatus and method for cleaning workpieces
DE1811537A1 (en) Dust removal appts for air stream, particularly for - use in paint spray booths

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

Kind code of ref document: A2

Designated state(s): DE ES FR GB IT

AX Request for extension of the european patent

Free format text: AL;LT;LV;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

RHK1 Main classification (correction)

Ipc: B08B 3/02

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;RO;SI

17P Request for examination filed

Effective date: 19981112

AKX Designation fees paid

Free format text: DE ES FR GB IT

RBV Designated contracting states (corrected)

Designated state(s): DE ES FR GB IT

17Q First examination report despatched

Effective date: 20001128

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): ES FR GB IT

RBV Designated contracting states (corrected)

Designated state(s): ES FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

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

Effective date: 20030515

REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

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

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030903

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

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030904

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2193306

Country of ref document: ES

Kind code of ref document: T3

ET Fr: translation filed
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

GBPC Gb: european patent ceased through non-payment of renewal fee
26N No opposition filed

Effective date: 20040217

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20040830

Year of fee payment: 8

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20030904

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050903

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

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060531

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20060531