EP0769085A1 - Nozzle arrangement and its use - Google Patents

Nozzle arrangement and its use

Info

Publication number
EP0769085A1
EP0769085A1 EP95922395A EP95922395A EP0769085A1 EP 0769085 A1 EP0769085 A1 EP 0769085A1 EP 95922395 A EP95922395 A EP 95922395A EP 95922395 A EP95922395 A EP 95922395A EP 0769085 A1 EP0769085 A1 EP 0769085A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
flow
arrangement according
nozzle arrangement
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP95922395A
Other languages
German (de)
French (fr)
Other versions
EP0769085B1 (en
Inventor
Sandor Palffy
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.)
Dr H Frauenknecht GmbH
Original Assignee
Festo SE and Co KG
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 Festo SE and Co KG filed Critical Festo SE and Co KG
Publication of EP0769085A1 publication Critical patent/EP0769085A1/en
Application granted granted Critical
Publication of EP0769085B1 publication Critical patent/EP0769085B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
    • E01H1/08—Pneumatically dislodging or taking-up undesirable matter or small objects; Drying by heat only or by streams of gas; Cleaning by projecting abrasive particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/02—Nozzles
    • A47L9/08—Nozzles with means adapted for blowing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00—Cleaning by methods involving the use of air flow or gas flow
    • B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
    • E01H1/08—Pneumatically dislodging or taking-up undesirable matter or small objects; Drying by heat only or by streams of gas; Cleaning by projecting abrasive particles
    • E01H1/0863—Apparatus loosening or removing the dirt by blowing and subsequently dislodging it at least partially by suction ; Combined suction and blowing nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
    • B08B2203/02—Details of machines or methods for cleaning by the force of jets or sprays
    • B08B2203/0229—Suction chambers for aspirating the sprayed liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2205/00—Details of machines or methods for cleaning by the use of gas or air flow
    • B08B2205/005—Using the coanda effect of the gas flow/stream

Definitions

  • the present invention relates to a nozzle arrangement for the targeted reception and removal of solid particles and / or fluids, separate nozzle parts being connected to pressure or suction lines.
  • Compressors which accelerate a transport medium are generally connected to known nozzles for receiving and transporting away particles such as sand, dust, packaging and insulating material or of flow media (flowable media) such as gases, real liquids or powdery substances etc. .
  • flow media flowable media
  • Corresponding suction processes require high suction power in order to generate the necessary tensile forces, usually cause a great deal of noise and also transport the goods to the destination with a considerable excess of energy.
  • the required compressor output should be smaller than the known suction arrangements and should also be used optimally; the transport fluid must be light to the task, i.e. to those to be transported
  • Particles and / or similar or different types of other currents be adaptable, even under changing operating conditions, during their use.
  • a major advantage of this solution is that the shear forces generated by the guided pressure flow frees the particles to be absorbed and / or further flow means from their base and sets them in motion, so that they then become lighter, which means with less energy and at lower speeds , can be transported.
  • the suction flow is expediently larger in quantity than the pressure flow.
  • release agents listed by way of example in claim 1 are by no means to be considered conclusively; they can be supplemented or replaced by other process engineering means known per se and chemical / physical processes such as ion exchangers, cold traps, etc.
  • the tear-off part according to claim 2 is used for targeted vortex formation and beam steering and is advantageously provided in addition to a tear-off edge.
  • a pulsator can be fastened in the area of the nozzle gap, which is arranged in an elastic or articulated manner. This pulsator causes impulsive turbulence in the work area to detach the Coanda flow. rich. In this way, transient processes are specifically generated, which replace a corresponding, complex control of the pressure flow.
  • the further developed arrangement according to claim 4 allows an adaptation of the flows to the working conditions and to the media to be transported.
  • the flow conditions during operation can also be controlled using suitable actuators.
  • the additional bores or gaps according to claim 5 have the advantage that they increase the flow in the work area.
  • a driven or autorotating brush is used, which either directly contacts the surface to be processed, or is located above this surface and only influences the flows in the transverse direction and thereby helps to absorb the media to be transported.
  • the advantageous development according to claim 7 is distinguished by its different flow velocities in the same pressure nozzle part, which has a particularly positive effect on the delivery capacity of the arrangement in the case of light particles.
  • connection of the pressure and suction lines to a common drive unit is particularly energy-saving and, in addition to being highly economical, also has a positive effect on noise emissions.
  • the drying and degassing according to claim 11 is important in general process engineering, but also in civil engineering (road construction).
  • FIG. 1 shows a sectional view A - A through the first variant of a nozzle arrangement FIG. 2,
  • FIG. 2 shows a side view of the nozzle according to FIG. 1,
  • Fig. 3 is a view of a nozzle arrangement, the middle with
  • Compressed air is supplied and which tapers down towards the nozzle gap
  • FIG. 4 shows a section through a variant of an arrangement with a nose-shaped tear-off part
  • 5 shows a section through a further variant with a nose-shaped tear-off part
  • FIG. 6 shows a pulsator which is attached to the conductive guide wall in an elastic or articulated manner
  • Fig. 7 one with adjusting means and also in the
  • FIG. 10 shows a variant of the subject matter of the invention with two mutually working nozzles, with a recirculation of the flow conducted via a fan,
  • FIG. 11 shows a partial view of an arrangement analogous to FIG. 10 in a schematic plan view, lateral flaps being drawn in to produce a tangential, central flow, and
  • Fig. 12 shows a variant of Fig. 11 with two double vertebrae.
  • a pressure nozzle part is designated 1; a suction nozzle part with 2.
  • the pressure nozzle part 1 is connected to the pressure line 3, the elongated connection opening 4 between the line 3 and the pressure nozzle part 1 serving as a passage.
  • the suction nozzle part 2 is connected to the line 5 for extracted fluid, possibly with suctioned off solid particles, via an elongated connecting opening 6 between the line 5 and the suction nozzle part 2.
  • Both nozzle parts 1 and 2 become guided along an inner tube 8.
  • the nozzle parts are formed by outer guide walls 9.
  • the left outer guide wall is outwards, which means bent downwards and thus forms an edge 9a.
  • a pressure flow is symbolized by the reference numeral 10 and a suction flow by the reference numeral 10a.
  • a strut 11 fixes the lines 3 and 5.
  • a web 12 connects the lines 3 and 5 mentioned to the central tube 8.
  • the inner guide walls formed by the tube 8, like those of the wall 9, are smooth.
  • a dash-dotted, imaginary plane E is determined by the nozzle gap 7 in its position; the pressure nozzle 1 acts on this - imaginary - plane at an acute angle, denoted by ⁇ .
  • the Coanda flow which occurs on the smooth surfaces F undergoes a brusque change of direction by means of a tear-off edge K and causes a desired eddy formation in the working area of the arrangement.
  • weld seams 13 are also shown at some points in the arrangement.
  • FIG. 2 shows the already mentioned line 3 for extracted media and the left outer guide wall 9 with the edge 9a bent outwards.
  • a flange-like cover 14, cf. FIG. 1 can be removed, which enables the interior to be cleaned.
  • Another cover 15, in the left part of Fig. 2 is fixed.
  • the reference number 16 denotes a connecting part for the lines 3 and 5, which, in a notoriously known manner, is used for coupling with suction and pressure lines which lead to a fan (not shown).
  • 3 shows a variant of FIGS. 1 and 2, in which a compressed air line 3 is supplied with the compressed air in the center by means of the connecting part 16a.
  • the outer guide walls 9 taper downwards in the direction of the nozzle gap.
  • lids 14 and 15 are provided.
  • a spherical solution can be realized - not shown here - the inner tube 8 then also having to be replaced by a ball.
  • a nose-shaped angle body 21 is indicated, which causes an additional constriction between the nozzle gap 7 and the surface to be machined.
  • Fig. 5 shows a nose-shaped body 22 which is rounded and rigid or flexible. This also changes the flow conditions in the gap 7, but not to the same extent as the aforementioned angular body 21.
  • Both bodies 21 and 22 cause a change in the direction of the Coanda flow and thus serve the intended instinctive vortex formation.
  • Fig. 6 shows the surface M to be machined and, among other things. also a pulsator 24, which is fastened elastically or in an articulated manner on the guide wall 9 and serves to generate vibrations in the flow 10 and thereby also in the flow 10a.
  • a pulsator 24 which is fastened elastically or in an articulated manner on the guide wall 9 and serves to generate vibrations in the flow 10 and thereby also in the flow 10a.
  • the direction of oscillation of the pulsator 24 is indicated by a double arrow.
  • FIG. 7 again shows the surface M to be machined, and in addition a secondary flow 23 which leads through nozzle-shaped holes or longitudinal slots 23a in the outer guide wall 9.
  • This additional stream 23 also acts on the working area of the nozzle arrangement.
  • An additional overpressure p in the tube 8 forms, via a bore 19 or a gap or a plurality of bores 19, a further flow acting centrally in the working area, symbolized by a dashed arrow 20.
  • the overpressure p can be easily controlled and can be used intermittently as an additional flow.
  • Fig. 8 shows a rotating brush 25 which in this case is driven by the flow 10 and 10a. It is of course also possible for this to be driven with an electric motor or, for example, a turbine, additionally rotating in the direction of the arrow.
  • This brush helps to transport the solid particles into the area of the nozzle gap 7, where they are caught by the suction flow 10a.
  • Fig. 9 shows the appropriate division and management of
  • the suction nozzle part 2 shows another variant of the nozzle arrangement.
  • the pressure nozzle part 1 guides the compressed air flow 10 into the center of the nozzle gap 7.
  • the suction nozzle part 2 sucks the media to be conveyed from the nozzle gap 7, forming axially parallel Vortex - as indicated in the drawing - from.
  • the outer guide walls 9 form a flat box in which the tubes for the pressure flow 10 and the suction flow 10a are embedded from above.
  • the suction nozzle part 2 consists of a tubular part 2 'and a concentrically existing guide flange 2 ", which is laterally adapted to the box shape of the guide walls 9.
  • the connecting lines 30 for the circulation lead the suction flow 10a into the conveying and / or separator and / or condenser 27, which is provided with a bypass 28. Further connecting lines 31 connect a compressor 29 for recirculation to the pressure nozzle part 1.
  • the vortex formation in the box can be influenced by lateral openings 32 (not shown in FIG. 10, see FIGS. 11 and 12), preferably by tabs bent out of the guide walls 9.
  • FIGS. 11 and 12 This possibility is outlined in FIGS. 11 and 12, lobes bent into the box being designated by 33; the resulting vortex flow is again indicated by arrows 18.
  • the resulting circular vortex flow is designated W in FIG. 11.
  • the two double vertebrae formed in the arrangement in FIG. 12 are each characterized by W '.
  • Process engineering cycles are also conceivable, in which, for example, an inert transport medium is used, which is kept by a bypass at a constant concentration value or replenished.

Abstract

PCT No. PCT/CH95/00152 Sec. 371 Date Jan. 6, 1996 Sec. 102(e) Date Jan. 6, 1996 PCT Filed Jul. 4, 1995 PCT Pub. No. WO96/01343 PCT Pub. Date Jan. 18, 1996With one or several pressure streams projected at an acute angle ( alpha ) in relation to the surface to be processed, shearing forces can be reached that are high enough to move solid particles and/or fluid media and thus make it easier to suck them away. The recognition of this fact is used in a delivery/suction nozzle arrangement together with the per se known Coanda effect. The invention may be used with all fluid media, preferably for cleaning practicable and passage surfaces; also for drying and/or degassing surfaces, as well as for industrial processes, in particular substance separation processes.

Description

D ü s e n a n o r d n u n g und deren V e r w e n d u n gD a s a n o r d n u n g and their use
Die vorliegende Erfindung betrifft eine Düsenanordnung zur gezielten Aufnahme und zum Abtransport von festen Teilchen und/oder Strömungsmitteln, wobei von einander getrennte Dü¬ senteile mit Druck- bzw. Saugleitungen verbunden sind.The present invention relates to a nozzle arrangement for the targeted reception and removal of solid particles and / or fluids, separate nozzle parts being connected to pressure or suction lines.
Sie bezieht sich ferner auf bevorzugte Verwendungen dieser Düsenanordnung.It also relates to preferred uses of this nozzle arrangement.
An bekannte Düsen zur Aufnahme und zum Abtransport von Teil- chen wie Sand, Staub Verpackungs-und Isoliermaterial oder von Strömungsmitteln (strömungsfähigen Medien) wie Gasen, realen Flüssigkeiten oder pulverförmigen Stoffen etc. sind in der Regel Verdichter angeschlossen, welche ein Transport¬ medium beschleunigen. Entsprechende Absaugvorgange erfordern hohe Saugleistungen um die notwendigen Zugkräfte zu erzeu¬ gen, verursachen meist einen grossen Lärm und befördern das Transportgut zudem mit einem beträchtlichen Energieüber- schuss an den Zielort.Compressors which accelerate a transport medium are generally connected to known nozzles for receiving and transporting away particles such as sand, dust, packaging and insulating material or of flow media (flowable media) such as gases, real liquids or powdery substances etc. . Corresponding suction processes require high suction power in order to generate the necessary tensile forces, usually cause a great deal of noise and also transport the goods to the destination with a considerable excess of energy.
In der Folge werden beispielsweise Staubpartikel durch Fil- ter hindurchbefördert, so dass ein Reinigungsvorgang in praxi oft nur in einem physikalischen Trennen von grösseren und kleineren Teilchen resultiert; der durch die Filter dringende Staub wird bloss umgelagert.As a result, dust particles are conveyed through filters, for example, so that a cleaning process in practice often only results in a physical separation of larger and smaller particles; the dust penetrating through the filters is only rearranged.
Es ist daher Aufgabe der vorliegenden Erfindung eine Vor- richtung zu schaffen, die den Nachteil des Bekannten nicht aufweist.It is therefore an object of the present invention to provide a device which does not have the disadvantage of the known.
Die erforderliche Verdichterleistung soll gegenüber den be¬ kannten Sauganordnungen kleiner sein und zudem optimal ge¬ nutzt werden; das Transport-Strömungsmittel muss leicht an die jeweilige Aufgabe, d.h. an die zu transportierendenThe required compressor output should be smaller than the known suction arrangements and should also be used optimally; the transport fluid must be light to the task, i.e. to those to be transported
Teilchen und/oder gleich- oder andersartigen weiteren Strö- mungsmittel, auch unter wechselnden Betriebsbedingungen, während ihres Einsatzes, anpassbar sein.Particles and / or similar or different types of other currents be adaptable, even under changing operating conditions, during their use.
Die vorliegende Aufgabe wird durch die Düsenanordnung gemäss dem Merkmal des Patentanspruchs 1 gelöst.The present object is achieved by the nozzle arrangement according to the feature of patent claim 1.
Erfindungsgemäss erfolgt dabei eine gezielte Führung desAccording to the invention, the guidance of the
Transportmediums unter Ausnutzung des an sich aus der Fluid- mechanik bekannten Coanda-Effektes.Transport medium using the Coanda effect known per se from fluid mechanics.
Ein wesentlicher Vorteil dieser Lösung besteht darin, dass die durch die geführte Druckströmung erzeugten Scherkräfte die aufzunehmenden Teilchen und/oder weiteren Strömungsmit¬ tel von ihrer Unterlage befreit und in Bewegung versetzt, so dass sie dann leichter, dies bedeutet mit weniger Energie und bei geringeren Geschwindigkeiten, transportiert werden können.A major advantage of this solution is that the shear forces generated by the guided pressure flow frees the particles to be absorbed and / or further flow means from their base and sets them in motion, so that they then become lighter, which means with less energy and at lower speeds , can be transported.
Zweckmässigerweise ist dabei die Saugströmung mengenmässig grösser als die Druckströmung.In this case, the suction flow is expediently larger in quantity than the pressure flow.
Die im Anspruch 1 beispielshaft aufgeführten Trennmittel sind keineswegs abschliessend zu betrachten; sie können durch andere, an sich bekannte, verfahrenstechnische Mittel und chemisch/physikalische Verfahren wie Ionenaustauscher, Kältefallen etc. ergänzt oder ersetzt werden.The release agents listed by way of example in claim 1 are by no means to be considered conclusively; they can be supplemented or replaced by other process engineering means known per se and chemical / physical processes such as ion exchangers, cold traps, etc.
In nachfolgenden abhängigen Ansprüchen sind vorteilhafte Weiterbildungen des Erfindungsgegenstandes beschrieben.Advantageous developments of the subject matter of the invention are described in the following dependent claims.
Das Abrissteil gemäss Anpruch 2 dient der gezielten Wirbel- bildung und Strahllenkung und wird vorteilhafterweise zu¬ sätzlich zu einer Abrisskante vorgesehen.The tear-off part according to claim 2 is used for targeted vortex formation and beam steering and is advantageously provided in addition to a tear-off edge.
Gemäss Anspruch 3 kann im Bereich des Düsenspaltes ein Pul- sator befestigt werden, der elastisch oder gelenkig angeord¬ net ist. Dieser Pulsator bewirkt der Ablösung der Coanda- Strömung dienende, impulsartige Turbulenzen im Arbeitsbe- reich. Dadurch werden gezielt instationäre Vorgänge erzeugt, welche eine entsprechende, aufwendige Steuerung der Druck¬ strömung ersetzen.According to claim 3, a pulsator can be fastened in the area of the nozzle gap, which is arranged in an elastic or articulated manner. This pulsator causes impulsive turbulence in the work area to detach the Coanda flow. rich. In this way, transient processes are specifically generated, which replace a corresponding, complex control of the pressure flow.
Die weiterentwickelte Anordnung nach Anspruch 4 erlaubt eine Anpassung der Strömungen an die Arbeitsbedingungen und an die zu befördernden Medien. Ebenfalls lassen sich, unter Verwendung geeigneter Stellglieder, die Strömungsverhält¬ nisse im Betrieb regeln.The further developed arrangement according to claim 4 allows an adaptation of the flows to the working conditions and to the media to be transported. The flow conditions during operation can also be controlled using suitable actuators.
Die zusätzlichen Bohrungen oder Spalte gemäss Anspruch 5 ha- ben den Vorteil, dass sie die Strömung im Arbeitsbereich verstärken.The additional bores or gaps according to claim 5 have the advantage that they increase the flow in the work area.
Nach Anspruch 6 wird eine angetriebene oder autorotierende Bürste angesetzt, die entweder direkt die zu bearbeitende Unterlage berührt, oder sich oberhalb dieser Unterlage be- findet und nur die Strömungen in Querrichtung beeinflusst und dadurch die zu transportierenden Medien aufzunehmen hilft.According to claim 6, a driven or autorotating brush is used, which either directly contacts the surface to be processed, or is located above this surface and only influences the flows in the transverse direction and thereby helps to absorb the media to be transported.
Die vorteilhafte Weiterbildung nach Anspruch 7 zeichnet sich durch ihre unterschiedlichen Strömungsgeschwindigkeiten im selben Druck-Düsenteil aus, was sich insbesondere positiv auf die Förderleistung der Anordnung bei leichten Teilchen auswirkt.The advantageous development according to claim 7 is distinguished by its different flow velocities in the same pressure nozzle part, which has a particularly positive effect on the delivery capacity of the arrangement in the case of light particles.
Der Anschluss von Druck- und Saugleitung an eine gemeinsame Antriebseinheit, Anspruch 8, ist besonders energiesparend und wirkt sich neben der hohen Wirschaftlichkeit auch posi¬ tiv auf die Lärmemission aus.The connection of the pressure and suction lines to a common drive unit is particularly energy-saving and, in addition to being highly economical, also has a positive effect on noise emissions.
Besonders bewährt haben sich seitliche Öffnungen im Saugdü¬ senteil, welche hier eine schraubenförmige Strömung generie¬ ren, die dem Abtransport der Strömungsmittel und von even- tuellen Teilchen förderlich ist, Anspruch 9. Eine bevorzugte Verwendung des Erfindungsgegenstandes ist in mobilen Reinigungsmaschinen für begeh- und befahrbare Flä¬ chen zu sehen, Anspruch 10.Lateral openings in the suction nozzle part, which generate a helical flow here, which promotes the removal of the fluids and any particles, have proven particularly useful. A preferred use of the subject matter of the invention can be seen in mobile cleaning machines for surfaces that can be walked on and driven over, claim 10.
Die Verwendung des Erfindungsgegenstandes in Sandauffangbec- ken und zur Reinigung von Schwimmbecken wirkt sich ebenfalls besonders effizient aus.The use of the subject matter of the invention in sand collecting basins and for cleaning swimming pools also has a particularly efficient effect.
Die Trocknung und Entgasung nach Anspruch 11 ist in der all¬ gemeinen Verfahrenstechnik, aber auch im Hoch- und Tiefbau (Strassenbau) von Wichtigkeit.The drying and degassing according to claim 11 is important in general process engineering, but also in civil engineering (road construction).
Ebenfalls für die Verfahrenstechnik ist die Verwendung gemäss Anspruch 12 vorteilhaft; günstig erscheint sie insbe¬ sondere auch für Trennvorgänge im Recycling von Stoffen un¬ terschiedlicher Dichte und Strömungswiderstände.The use according to claim 12 is also advantageous for process engineering; It also appears to be favorable, in particular, for separation processes in the recycling of substances of different densities and flow resistances.
Nachfolgend wird die Erfindung anhand von charakteristischen Ausführungsbeispielen näher erläutert, wobei die genannten Strömungsmittel selbstverständlich jeweils durch andere er¬ setzt werden können. In sämtlichen Zeichnungen sind gleiche Funktionsteile mit denselben Bezugszeichen bezeichnet.The invention is explained in more detail below on the basis of characteristic exemplary embodiments, it being possible, of course, for the aforementioned fluid to be replaced by another. In all drawings, the same functional parts are identified by the same reference numerals.
Es zeigen:Show it:
Fig. 1 Eine Schnittdarstellung A--A durch die erste Vari¬ ante einer Düsenanordnung Fig. 2,1 shows a sectional view A - A through the first variant of a nozzle arrangement FIG. 2,
Fig. 2 eine Seitenansicht der Düse gemäss Fig. 1 ,2 shows a side view of the nozzle according to FIG. 1,
Fig. 3 die Ansicht einer Düsenanordnung, die mittig mitFig. 3 is a view of a nozzle arrangement, the middle with
Druckluft versorgt wird und die sich nach unten in Richtung zum Düsenspalt verjüngt,Compressed air is supplied and which tapers down towards the nozzle gap,
Fig. 4 einen Schnitt durch eine Variante einer Anordnung mit einem nasenförmigen Abrissteil, Fig. 5 einen Schnitt durch eine weitere Variante mit einem nasenförmigen Abrissteil,4 shows a section through a variant of an arrangement with a nose-shaped tear-off part, 5 shows a section through a further variant with a nose-shaped tear-off part,
Fig. 6 einen Pulsator, der elastisch oder gelenkig an der leitenden Führungswand befestigt ist,6 shows a pulsator which is attached to the conductive guide wall in an elastic or articulated manner,
Fig. 7 eine mit Verstellmitteln sowie zusätzlich in denFig. 7 one with adjusting means and also in the
Führungswänden mit Bohrungen oder Längsschlitzen versehene Anordnung,Arrangement of guide walls with holes or longitudinal slots,
Fig. 8 eine weitere Variante mit einer rotierenden Bürste, zur zusätzlichen Bewegung der Strδmungsmittel und Teilchen8 shows a further variant with a rotating brush, for the additional movement of the flow means and particles
Fig. 9 eine Zwischenwand, die die Druckdüse in eine engere Düse und in einen äusseren Diffusor teilt,9 an intermediate wall which divides the pressure nozzle into a narrower nozzle and into an outer diffuser,
Fig. 10 eine Variante des Erfindungsgegenstandes mit zwei gegenseitig arbeitenden Düsen, mit über einen Ven- tilator geführter Re-Zirkulation der Strömung,10 shows a variant of the subject matter of the invention with two mutually working nozzles, with a recirculation of the flow conducted via a fan,
Fig. 11 eine Teilansicht einer zu Fig. 10 analogen Anordnung in einer schematischen Draufsicht, wobei seitliche Lappen zur Erzeugung einer tangentialen, zentralen Strömung eingezeichnet sind und11 shows a partial view of an arrangement analogous to FIG. 10 in a schematic plan view, lateral flaps being drawn in to produce a tangential, central flow, and
Fig. 12 eine Variante zu Fig. 11 mit zwei Doppelwirbeln.Fig. 12 shows a variant of Fig. 11 with two double vertebrae.
In Figur 1 ist ein Druck-Düsenteil mit 1 bezeichnet; ein Saug-Düsenteil mit 2. Das Druck-Düsenteil 1 ist an die Druckleitung 3 angeschlossen, wobei die längliche Verbin¬ dungsöffnung 4 zwischen der Leitung 3 und dem Druck-Düsen- teil 1 als Durchgang dient. Das Saug-Düsenteil 2 ist mit der Leitung 5 für abgesaugte Strömungsmittel, eventuell mit ab¬ gesaugten festen Teilchen, über eine längliche Verbindungs¬ öffnung 6 zwischen der Leitung 5 und dem Saug-Düsenteil 2 verbunden. Zwischen den Enden der Düsenteile 1 und 2 befin- det sich ein Düsenspalt 7. Beide Düsenteile 1 und 2 werden entlang eines inneren Rohres 8 geführt. Von der äusseren Seite sind die Düsenteile durch äussere Führungswände 9 ge¬ bildet. Die linke äussere Führungswand ist nach aussen, das bedeutet nach unten gebogen und bildet somit einen Rand 9a. Mit dem Bezugszeichen 10 ist eine Druckströmung symboli¬ siert, mit dem Bezugszeichen 10a eine Saugströmung. Eine Verstrebung 11 fixiert die Leitungen 3 und 5. Ein Steg 12 verbindet die genannten Leitungen 3 und 5 mit dem zentralen Rohr 8.In Figure 1, a pressure nozzle part is designated 1; a suction nozzle part with 2. The pressure nozzle part 1 is connected to the pressure line 3, the elongated connection opening 4 between the line 3 and the pressure nozzle part 1 serving as a passage. The suction nozzle part 2 is connected to the line 5 for extracted fluid, possibly with suctioned off solid particles, via an elongated connecting opening 6 between the line 5 and the suction nozzle part 2. There is a nozzle gap 7 between the ends of the nozzle parts 1 and 2. Both nozzle parts 1 and 2 become guided along an inner tube 8. From the outer side, the nozzle parts are formed by outer guide walls 9. The left outer guide wall is outwards, which means bent downwards and thus forms an edge 9a. A pressure flow is symbolized by the reference numeral 10 and a suction flow by the reference numeral 10a. A strut 11 fixes the lines 3 and 5. A web 12 connects the lines 3 and 5 mentioned to the central tube 8.
Die inneren Führungswände, gebildet durch das Rohr 8, wie auch diejenigen der Wand 9, sind glatt ausgebildet.The inner guide walls formed by the tube 8, like those of the wall 9, are smooth.
Eine strichpunktiert gezeichnete, gedachte Ebene E ist vom Düsenspalt 7 in ihrer Lage bestimmt; die Druck-Düse 1 beauf¬ schlagt diese - gedachte - Ebene unter einem spitzen Winkel, mit α bezeichnet.A dash-dotted, imaginary plane E is determined by the nozzle gap 7 in its position; the pressure nozzle 1 acts on this - imaginary - plane at an acute angle, denoted by α.
Die an den glatten Flächen F sich einstellende Coanda-Strö- mung erfährt mittels einer Abrisskante K eine brüske Rich- tungsänderung und verusacht eine gewollte Wirbelbildung im Arbeitsbereich der Anordnung.The Coanda flow which occurs on the smooth surfaces F undergoes a brusque change of direction by means of a tear-off edge K and causes a desired eddy formation in the working area of the arrangement.
Aus Anschaulichkeitsgründen sind zudem an einigen Stellen der Anordnung Schweissnähte 13 dargestellt .For reasons of clarity, weld seams 13 are also shown at some points in the arrangement.
Fig. 2 zeigt die schon erwähnte Leitung 3 für abgesaugte Me¬ dien und die linke äussere Führungswand 9 mit dem nach aus¬ sen gebogenen Rand 9a. Ein flanschartiger Deckel 14, vgl Fig. 1, ist demontierbar, was eine Reinigung des Inneren er¬ möglicht. Ein weiterer Deckel 15, im linken Teil der Fig. 2, ist fest angeordnet. Mit der Bezugsziffer 16 ist ein An¬ schlussteil für die Leitungen 3 und 5 bezeichnet, welches in notorisch bekannter Weise der Kupplung mit Saug- und Druck- leitungen dient, die zu einem nicht dargestellten Ventilator führen. Fig. 3 zeigt eine Variante zu Fig. 1 und 2, bei der eine Druckluftleitung 3 mittig mittels des Anschlussteils 16a mit der Druckluft versorgt wird. Die äusseren Führungswände 9 verjüngen sich nach unten in Richtung zum Düsenspalt. - Wie in Fig. 2 sind wiederum Deckel 14 und 15 vorgesehen.2 shows the already mentioned line 3 for extracted media and the left outer guide wall 9 with the edge 9a bent outwards. A flange-like cover 14, cf. FIG. 1, can be removed, which enables the interior to be cleaned. Another cover 15, in the left part of Fig. 2, is fixed. The reference number 16 denotes a connecting part for the lines 3 and 5, which, in a notoriously known manner, is used for coupling with suction and pressure lines which lead to a fan (not shown). 3 shows a variant of FIGS. 1 and 2, in which a compressed air line 3 is supplied with the compressed air in the center by means of the connecting part 16a. The outer guide walls 9 taper downwards in the direction of the nozzle gap. - As in Fig. 2 again lids 14 and 15 are provided.
In analoger Weise lässt sich - hier nicht dargestellt - eine kugelförmige Lösung realisieren, wobei dann auch das innere Rohr 8 durch eine Kugel zu ersetzen ist.In an analogous manner, a spherical solution can be realized - not shown here - the inner tube 8 then also having to be replaced by a ball.
In Fig. 4 ist ein nasenförmiger Winkel-Körper 21 angedeutet, der eine zusätzliche Verengung zwischen dem Düsenspalt 7 und der Oberfläche, die zu bearbeiten ist, bewirkt.In Fig. 4, a nose-shaped angle body 21 is indicated, which causes an additional constriction between the nozzle gap 7 and the surface to be machined.
Fig. 5 zeigt einen nasenförmigen Körper 22, der gerundet und starr oder flexibel ausgebildet ist. Auch dieser ändert die Strömungsverhältnisse im Spalt 7, jedoch nicht in dem Aus- mass, wie der vorher genannte Winkel-Körper 21.Fig. 5 shows a nose-shaped body 22 which is rounded and rigid or flexible. This also changes the flow conditions in the gap 7, but not to the same extent as the aforementioned angular body 21.
Beide Körper 21 und 22 bewirken eine Richtungsänderung der Coanda- Strömung und dienen somit der gewollten instatio¬ nären Wirbelbildung.Both bodies 21 and 22 cause a change in the direction of the Coanda flow and thus serve the intended instinctive vortex formation.
Fig. 6 zeigt die zu bearbeitende Fläche M sowie u.a. auch einen Pulsator 24, der elastisch oder gelenkig auf der Füh¬ rungswand 9 befestigt ist und der Erzeugung von Schwingungen in der Strömung 10 und dadurch auch in der Strömung 10a dient.Fig. 6 shows the surface M to be machined and, among other things. also a pulsator 24, which is fastened elastically or in an articulated manner on the guide wall 9 and serves to generate vibrations in the flow 10 and thereby also in the flow 10a.
Die Schwingungsrichtung des Pulsators 24 ist durch einen Doppelpfeil angedeutet.The direction of oscillation of the pulsator 24 is indicated by a double arrow.
Fig. 7 zeigt wiederum die zu bearbeitende Fläche M, und dazu einen Nebenstrom 23, der durch düsenförmige Löcher oder Längsschlitze 23a in der äusseren Führungswand 9 führt. Auch dieser Zusatzstrom 23 beaufschlagt den Arbeitsbereich der Düsenanordnung. Ein zusätzlicher Überdruck p im Rohr 8 bildet über eine Boh¬ rung 19 bzw. einen Spalt oder mehrere Bohrungen 19 eine wei¬ tere zentral in den Arbeitsbereich wirkende Strömung, symbo¬ lisiert durch einen gestrichelten Pfeil 20.FIG. 7 again shows the surface M to be machined, and in addition a secondary flow 23 which leads through nozzle-shaped holes or longitudinal slots 23a in the outer guide wall 9. This additional stream 23 also acts on the working area of the nozzle arrangement. An additional overpressure p in the tube 8 forms, via a bore 19 or a gap or a plurality of bores 19, a further flow acting centrally in the working area, symbolized by a dashed arrow 20.
Der Überdruck p lässt sich leicht steuern und kann als Zu¬ satzströmung intermittierend eingesetzt werden.The overpressure p can be easily controlled and can be used intermittently as an additional flow.
Fig. 8 zeigt eine rotierende Bürste 25, die in diesem Fall durch die Strömung 10 und 10a angetrieben ist. Es ist selbstverständlich auch möglich, dass diese mit einem Elek- tromotor oder beispielsweise einer Turbine, zusätzlich in Pfeilrichtung rotierend, angetrieben wird.Fig. 8 shows a rotating brush 25 which in this case is driven by the flow 10 and 10a. It is of course also possible for this to be driven with an electric motor or, for example, a turbine, additionally rotating in the direction of the arrow.
Diese Bürste hilft die festen Teilchen in den Bereich des Düsenspaltes 7 zu befördern, wo sie von der Saugströmung 10a erfasst werden.This brush helps to transport the solid particles into the area of the nozzle gap 7, where they are caught by the suction flow 10a.
Fig. 9 stellt die zweckmässige Teilung und Führung derFig. 9 shows the appropriate division and management of
Druckströmung durch eine Zwischenwand 26a (als fette Linie gezeichnet) mit den daraus resultierenden Geschwindigkeiten cl und c2 dar, wobei cl > c2 ist. Dies wirkt im Düsenspalt optimal in Verbindung mit einem nach aussen gebogenen Rand 9a in der Führungswand und erhöht die Förderleistung der An¬ ordnung.Pressure flow through an intermediate wall 26a (drawn as a bold line) with the resulting speeds cl and c2, where cl> c2. This works optimally in the nozzle gap in connection with an outwardly curved edge 9a in the guide wall and increases the conveying capacity of the arrangement.
Fig. 10 zeigt eine andere Variante der Düsenanordnung. Das Druck-Düsenteil 1 führt die Druckluftströmung 10 ins Zentrum des Düsenspaltes 7. Durch diese Anordnung wirkt die Scher- kraft konzentrisch auf die Oberfläche der zu bearbeitenden Fläche M. Das Saug-Düsenteil 2 saugt aus dem Düsenspalt 7 die zu befördernden Medien unter Bildung axparalleler Wirbel - wie in der Zeichnung angedeutet - ab. Die äusseren Füh¬ rungswände 9 bilden einen flachen Kasten, in welchem von oben die Rohre für die Druckströmung 10 und die Saugströmung 10a eingelassen sind. Das Saug-Düsenteil 2 besteht aus einem rohrförmigen Teil 2 ' und einem konzentrisch daraus hervorge- henden Leitflansch 2", welcher seitlich an die Kastenform der Führungswände 9 angepasst ist.10 shows another variant of the nozzle arrangement. The pressure nozzle part 1 guides the compressed air flow 10 into the center of the nozzle gap 7. As a result of this arrangement, the shear force acts concentrically on the surface of the surface M to be processed. The suction nozzle part 2 sucks the media to be conveyed from the nozzle gap 7, forming axially parallel Vortex - as indicated in the drawing - from. The outer guide walls 9 form a flat box in which the tubes for the pressure flow 10 and the suction flow 10a are embedded from above. The suction nozzle part 2 consists of a tubular part 2 'and a concentrically existing guide flange 2 ", which is laterally adapted to the box shape of the guide walls 9.
Wiederum stellt sich an den Flächen F die bereits beschrie¬ bene Coanda-Strömung ein und wird durch die Kanten K abge- löst.Again, the already described Coanda flow occurs on the surfaces F and is detached by the edges K.
Die Anschlussleitungen 30 für die Zirkulation führen die Saugströmung 10a in den Förder- und/oder Abscheider und/oder Kondensator 27, der mit einem Bypass 28 versehen ist. Wei¬ tere Anschlussleitungen 31 verbinden einen Verdichter 29 für die Rezirkulation mit dem Druckdüsenteil 1.The connecting lines 30 for the circulation lead the suction flow 10a into the conveying and / or separator and / or condenser 27, which is provided with a bypass 28. Further connecting lines 31 connect a compressor 29 for recirculation to the pressure nozzle part 1.
Durch in Fig. 10 nicht dargestellte seitliche Öffnungen 32, siehe Fig. 11 und Fig. 12, bevorzugt durch aus den Führungswänden 9 gebogene Lappen lässt sich die Wirbelbil¬ dung im Kasten beeinflussen.The vortex formation in the box can be influenced by lateral openings 32 (not shown in FIG. 10, see FIGS. 11 and 12), preferably by tabs bent out of the guide walls 9.
Diese Möglichkeit ist in Fig. 11 und 12 skizziert, wobei in den Kasten hineingebogene Lappen mit 33 bezeichnet sind; die resultierende WirbelStrömung ist wiederum durch Pfeile 18 angedeutet.This possibility is outlined in FIGS. 11 and 12, lobes bent into the box being designated by 33; the resulting vortex flow is again indicated by arrows 18.
Die sich einstellende zirkuläre WirbelStrömung ist in Fig. 11 mit W bezeichnet. Die in der Anordnung Fig. 12 gebildeten beiden Doppelwirbel, sind je mit W' charakterisiert.The resulting circular vortex flow is designated W in FIG. 11. The two double vertebrae formed in the arrangement in FIG. 12 are each characterized by W '.
Überraschend ist, dass der Erfindungsgegenstand, unter Anwendung des gleichen Prinzips, gute Erfolge bei geringer Leistung, beispielsweise bei der Reinigung von begeh- und befahrbaren Flächen, bei der Trocknung und/oder Entgasung von Oberflächen aber auch bei der gezielten Förderung von Flüssigkeiten zeigt.It is surprising that the subject of the invention, using the same principle, shows good success with low output, for example in the cleaning of surfaces that can be walked on and driven on, in the drying and / or degassing of surfaces, but also in the targeted delivery of liquids.
Es ist selbstverständlich, dass die Art der Strömungs Rück¬ führung über das selbe Antriebsaggregat auch bei den vorgän- gig beschriebenen Anordnungen möglich ist und Vorteile bie¬ tet. Die konstruktive Ausgestaltung ist in weiten Grenzen frei und erlaubt auch Anpassungen an das gewünschte Erscheinungs¬ bild (Design) .It goes without saying that the type of flow feedback via the same drive unit is also possible with the arrangements described above and offers advantages. The constructive design is free within wide limits and also allows adjustments to the desired appearance (design).
Denkbar sind auch verfahrenstechnische Kreisläufe, bei denen beispielsweise ein inertes Transportmedium eingesetzt wird, welches durch Bypasse auf einem konstanten Konzentrations¬ wert gehalten bzw. nachgespiesen wird. Process engineering cycles are also conceivable, in which, for example, an inert transport medium is used, which is kept by a bypass at a constant concentration value or replenished.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Düsenanordnung zur gezielten Aufnahme und zum Abtrans¬ port von festen Teilchen und/oder Strömungsmitteln, wo- bei von einander getrennte Düsenteile (1; 2) mit Druck¬ bzw. Saugleitungen (30; 31) verbunden sind, dadurch ge¬ kennzeichnet, dass wenigstens die Druckströmung (10) von einer glatt ausgebildeten Fläche (F) im Funktions¬ bereich eines Düsenspaltes (7) in einem spitzen Winkel (α) zu einer durch den Düsenspalt (7) bestimmten Ebene (E) geführt ist, dass im Funktionsbereich, in Strö¬ mungsrichtung, wenigstens ein Abrissteil (K; 21,22) für die Druckströmung (10) vorgesehen ist, welches der sich einstellenden Coanda-Strömung eine Richtungsänderung aufzwingt, und dass die durch Wirbel unterstützte1. Nozzle arrangement for the targeted reception and removal of solid particles and / or fluids, whereby separate nozzle parts (1; 2) are connected to pressure or suction lines (30; 31), characterized by that at least the pressure flow (10) is led from a smooth surface (F) in the functional area of a nozzle gap (7) at an acute angle (α) to a plane (E) determined by the nozzle gap (7), that in the functional area , in the direction of flow, at least one tearing part (K; 21, 22) is provided for the pressure flow (10), which forces the Coanda flow to change direction and that is supported by vortices
Scherkraft dieser Druckströmung (10) feste Teilchen und/oder Strömungsmittel aufnimmt und über den Düsen¬ spalt (7), mit einer an diesen angelegten Saugströmung (10a) , über wahlweise angesetzte physikalisch/tech- nische Apparate wie Filter, Abscheider und/oder Katalysatoren, Kondensatoren (27) abführt.Shear force of this pressure flow (10) absorbs solid particles and / or fluid and via the nozzle gap (7), with a suction flow (10a) applied to it, via optionally attached physical / technical devices such as filters, separators and / or catalysts , Condensers (27) dissipates.
2. Düsenanordnung nach Anspruch 1, dadurch gekennzeichnet, dass das Abrissteil (21; 22) als nasenförmiger Körper (22) ausgebildet und starr oder flexibel ist.2. Nozzle arrangement according to claim 1, characterized in that the tear-off part (21; 22) is designed as a nose-shaped body (22) and is rigid or flexible.
3. Düsenanordnung nach Anspruch 1, dadurch gekennzeichnet, dass am Ende des Druck-Düsenteils (1) ein Pulsator (24) elastisch oder gelenkig befestigt ist.3. Nozzle arrangement according to claim 1, characterized in that at the end of the pressure nozzle part (1) a pulsator (24) is fastened elastically or articulated.
4. Düsenanordnung nach Anspruch 1, dadurch gekennzeichnet, dass die Druckströmung (10) und/oder die Saugströmung (10a) mit Breitenverstellmitteln (9b) gesteuert oder geregelt sind.4. Nozzle arrangement according to claim 1, characterized in that the pressure flow (10) and / or the suction flow (10a) with width adjustment means (9b) are controlled or regulated.
5. Düsenanordnung nach Anspruch 1, dadurch gekennzeichnet, dass in wenigstens in einer der Führungswände (8; 9) der Düsenteile (1; 2) im Arbeitsbereich zusätzlich Boh¬ rungen (19) oder Längs-Schlitze (23a) vorgesehen sind.5. Nozzle arrangement according to claim 1, characterized in that in at least one of the guide walls (8; 9) the nozzle parts (1; 2) are additionally provided with holes (19) or longitudinal slots (23a) in the work area.
6. Düsenanordnung nach Anspruch 1, dadurch gekennzeichnet, dass im Arbeitsbereich des Düsenspaltes (7) eine zylin- drische, angetriebene oder autorotierende Bürste (25) vorgesehen ist, welche die festen Teilchen und/oder Strömungsmittel aufnimmt und in Bewegung bringt.6. Nozzle arrangement according to claim 1, characterized in that in the working area of the nozzle gap (7) a cylindrical, driven or autorotating brush (25) is provided which receives the solid particles and / or fluid and sets it in motion.
7. Düsenanordnung nach Anspruch 1, dadurch gekennzeichnet, dass im Druck-Düsenteil (1) eine Zwischenwand (26a) vorgesehen ist, welche mit ihrer inneren Fläche die Düse (1) verengt und mit ihrer äusseren Fläche einen Diffusor (26) bildet.7. A nozzle arrangement according to claim 1, characterized in that an intermediate wall (26a) is provided in the pressure nozzle part (1), which narrows the nozzle (1) with its inner surface and forms a diffuser (26) with its outer surface.
8. Düsenanordnung nach Anspruch 1, dadurch gekennzeichnet, dass die Saugleitung (30) für die Saugströmung (10a) an den Einlass eines Verdichters (29) und die Druckleitung (31) für die Druckströmung (10) an dessen Auslass ange¬ schlossen ist, so dass sich zumindest eine partielle Rezirkulation der Strömungen (10, 10a) einstellt.8. Nozzle arrangement according to claim 1, characterized in that the suction line (30) for the suction flow (10a) is connected to the inlet of a compressor (29) and the pressure line (31) for the pressure flow (10) is connected to its outlet. so that at least a partial recirculation of the flows (10, 10a) occurs.
9. Düsenanordnung nach Anspruch 1 oder 8, dadurch gekenn- zeichnet, dass im Saug-Düsenteil (2) wenigstens eine seitliche Öffnung (32) für eine sich in tangentialer Richtung zur Saugströmung (10a) erstreckende weitere Strömung vorgesehen ist.9. Nozzle arrangement according to claim 1 or 8, characterized in that in the suction nozzle part (2) at least one lateral opening (32) is provided for a further flow extending in the tangential direction to the suction flow (10a).
10. Verwendung der Düsenanordnung nach wenigstens einem der Ansprüche 1 bis 9 als Druck/Saugdüse zur Reinigung von begeh- und befahrbaren Flächen und in Beckenreinigungs- geräten.10. Use of the nozzle arrangement according to at least one of claims 1 to 9 as a pressure / suction nozzle for cleaning accessible and passable surfaces and in pool cleaning devices.
11. Verwendung der Düsenanordnung nach wenigstens einem der Ansprüche 1 bis 9, zur Trocknung und/oder Entgasung von Oberflächen. 11. Use of the nozzle arrangement according to at least one of claims 1 to 9, for drying and / or degassing surfaces.
12. Verwendung der Düsenanordnung nach wenigstens einem der Ansprüche 1 bis 9 in StoffSeparatoren. 12. Use of the nozzle arrangement according to at least one of claims 1 to 9 in fabric separators.
EP95922395A 1994-07-05 1995-07-04 Nozzle arrangement and its use Expired - Lifetime EP0769085B1 (en)

Applications Claiming Priority (3)

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CH2164/94 1994-07-05
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ATE171495T1 (en) 1998-10-15
CZ297A3 (en) 1997-07-16
DE59503717D1 (en) 1998-10-29
AU2730995A (en) 1996-01-25
KR970704944A (en) 1997-09-06
JPH09512734A (en) 1997-12-22
JP2862379B2 (en) 1999-03-03
KR100433655B1 (en) 2004-09-10
US5884360A (en) 1999-03-23
CN1151774A (en) 1997-06-11
WO1996001343A1 (en) 1996-01-18
BR9508221A (en) 1997-10-28
CN1154770C (en) 2004-06-23

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