EP0533104B1 - Aerating nozzle for liquids - Google Patents

Aerating nozzle for liquids Download PDF

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Publication number
EP0533104B1
EP0533104B1 EP92115751A EP92115751A EP0533104B1 EP 0533104 B1 EP0533104 B1 EP 0533104B1 EP 92115751 A EP92115751 A EP 92115751A EP 92115751 A EP92115751 A EP 92115751A EP 0533104 B1 EP0533104 B1 EP 0533104B1
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EP
European Patent Office
Prior art keywords
annular channel
tubular section
nozzle according
aerating nozzle
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
EP92115751A
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German (de)
French (fr)
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EP0533104A1 (en
Inventor
Simon Redl
Johannes Wiederhold
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.)
Anton Steinecker Entwicklungs GmbH and Co
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Anton Steinecker Entwicklungs GmbH and Co
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Publication of EP0533104A1 publication Critical patent/EP0533104A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
    • B01F25/3142—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
    • B01F25/3142—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction
    • B01F25/31425—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction with a plurality of perforations in the axial and circumferential direction covering the whole surface
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S261/00—Gas and liquid contact apparatus
    • Y10S261/75—Flowing liquid aspirates gas

Definitions

  • the invention relates to a ventilation nozzle for liquids, in particular for aerating and atomizing beer wort and yeast with a liquid channel tapering in the flow direction, with a gas supply line for adding a gas into the liquid channel and with an expansion space adjoining the taper in the flow direction.
  • Venturi nozzles Such a ventilation nozzle is known from practice.
  • a gas flow is fed to the liquid flowing through the Venturi nozzle in such a way that the gas mixes with the liquid and the liquid is atomized in an expansion space adjoining the Venturi nozzle.
  • Such a ventilation nozzle is used e.g. in brewing technology for wort aeration and for yeast aeration. If the wort flowing into the nozzle is mixed with air, a fine distribution of the air in the wort is achieved, which has a favorable effect on the flotation effect. With a very fine distribution of the air bubbles in the wort, a very even foam blanket formation is achieved during the flotation.
  • the nozzles used are usually constructed in one piece. Therefore, their interior is difficult to access for cleaning.
  • the invention has for its object to provide a ventilation nozzle for liquids that is easy to clean inside, and is simple and inexpensive to manufacture.
  • the liquid channel is formed from two telescopically pushed pipe sections in such a way that the strongly overlapping areas of the pipe sections limit an annular channel, which is provided by circumferential recesses provided on the outside of one pipe section and on the inside of the other pipe section formed and sealed by seals provided on the mutually facing ends of the pipe sections to the liquid channel on the one hand and to the environment on the other hand, that the area separating the ring channel from the liquid channel is provided with gas passage openings, the gas supply line opening into the ring channel, and that the two pipe sections are connected to one another by means of radially outwardly projecting screw flanges and fastening screws distributed over their circumference, the screw flange of the annular channel na ch the outer sealing pipe section is attached to the front end.
  • the liquid channel is formed from two pipe sections, the liquid channel can be broken down into two parts, as a result of which its inside is easily accessible and is therefore easy to clean. Since the overlapping areas delimit an annular channel, the inside of this annular channel is also easily accessible when the two pipe sections are taken apart. When the pipe sections are taken apart, the area of the gas passage openings is also accessible from both sides, so that the gas passage openings can also be easily cleaned.
  • the manufacture of the ventilation nozzle by the two-part construction of the liquid channel is particularly simple and therefore inexpensive.
  • the ring channel can be produced simply by turning off a part of the tube section which has the screw flange on the end, so that the recess running around the inside is formed.
  • the other part of the pipe section is turned off, whereby the circumferential recess is created on the outside of this pipe section. In the latter, the gas passage openings can then be easily introduced through bores.
  • the assembly and disassembly of the two parts is particularly simple and reliable.
  • the ring channel is reliably and uniformly sealed over the circumference of the mutually facing end ends of the pipe sections.
  • the screw flange arranged on the end face has a circumferential groove on its surface facing the other screw flange, in which one of the seals for the annular channel is inserted.
  • a seal reliably seals the ring channel from the environment.
  • a commercially available O-ring can be used, which, if its sealing effect wears off after a long period of use, can easily be replaced by a new sealing ring at any time.
  • the pipe section which has the screw flange on the end also has the other seal which seals the ring channel and is inserted into a circumferential groove.
  • the front end of the other tube section has a radially outward-pointing, shoulder-extending sealing flange which interacts with the seal, the inside diameter of the two tube sections being the same size at this point.
  • the two assembled pipe sections form the liquid channel at this point with a uniform, constant inner diameter.
  • the circumferential groove has a T-shaped cross section, since a particularly effective sealing effect is achieved with a seal which has the same cross section.
  • the gas supply line is connected to the pipe section which has the screw flange on the end face and opens into the annular channel.
  • the gas can then be passed directly through the pipe section having the end screw flange into the ring channel, in which the gas is evenly distributed and fed to the liquid channel via the gas passage openings in the other pipe section becomes.
  • the end screw flange is attached as a separate component to the pipe section, preferably by welding. It forms part of the radial outer boundary of the ring channel.
  • inexpensive prefabricated components can be used for the screw flange.
  • the creation of the pipe section having the end screw flange is simplified since only a part of the circumferential recess on the inside, that is to say a part of the outer boundary of the ring channel, has to be unscrewed. If the inside diameter of the screw flange on the end corresponds to the inside diameter of the recess running around the inside of the pipe section, the outer boundary of the annular channel has a constant diameter along the entire length.
  • the screw flange of the other pipe section is pushed as a separate component radially onto the pipe section and fastened, preferably by welding. Because then it is also easy to manufacture the tube section which does not have the screw flange arranged on the end face, since apart from the recess which delimits the annular channel inwards, it has a smooth surface. Furthermore, the separate components are commercially available and inexpensive. It is also possible for the screw flange of the other pipe section to protrude axially beyond a wall axially delimiting the ring channel and likewise to form part of the radially outer delimitation of the ring channel. This will make the circumferential Recess, which must be formed on the inside of the pipe section having the end screw flange, is further shortened.
  • the two screw flanges can also be of identical design. This has the advantage that only one type of screw flange must be present in the manufacture of the ventilation nozzle. These screw flanges can then be attached to both pipe sections simply by welding.
  • the screw flanges can be arranged approximately in the middle of the ventilation nozzle. This simplifies the storage of the individual pipe sections, since they are approximately the same length. Furthermore, a favorable division of the liquid channel is achieved in the disassembled state, since none of the pipe sections is unnecessarily long. This means that both liquid channels are easily accessible for cleaning. The overlapping area of the two pipe sections in this arrangement is also small, so that the ventilation nozzle can be assembled and disassembled easily without the two parts easily tilting or bumping against one another and thus being damaged.
  • the single figure shows a partially longitudinally cut ventilation nozzle according to the invention.
  • the ventilation nozzle according to the invention has a liquid channel 1, which tapers in the direction of flow 2.
  • An expansion space 3 adjoins the liquid channel 1 in the flow direction 2.
  • the Liquid channel 1 is formed from two pipe sections, one of the pipe sections 4 having a screw flange 5 on the end face, which is screwed to a screw flange 7 attached to the other pipe section 6 with fastening screws 8 distributed over its circumference.
  • the two pipe sections 4, 6 are telescoped. In their overlapping area, the two pipe sections 4, 6 delimit an annular channel 9.
  • the annular channel is formed by a recess 10 running around the outside of the pipe section 6.
  • the outer boundary is partially formed by a recess 11 on the inside of the pipe section 4.
  • Another part of the outer boundary of the ring channel 9 is formed by the inner diameter of the screw flange 5 on the end face.
  • the inner diameter of the screw flange 5 corresponds to the inner diameter of the recess 11, so that the outer boundary of the annular chamber 9 has a constant diameter.
  • Another small part of the outer boundary of the annular chamber 9 is formed by the inner diameter of the screw flange 7, which is designed to match the inner diameter of the screw flange 5.
  • the screw flanges 5 and 7 are the same components.
  • the screw flange 5 is attached to the pipe section 4 by welding.
  • the screw flange 7 is axially attached to the jacket of the pipe section 6 by welding.
  • the screw flanges 5, 7 are arranged approximately in the middle of the ventilation nozzle.
  • the screw flange 5 arranged on the face side has on its surface facing the flange 7 a circumferential groove 12 with a T-shaped cross section, into which a sealing ring is inserted.
  • the ring channel 9 is sealed to the outside by this seal 12.
  • the tube section 4 has a radially inwardly projecting shoulder 13 which is axially spaced from its end face and which axially delimits the annular channel 9.
  • the front end of the other tube section 6 has a radially outward-pointing sealing flange 14 which extends into the shoulder 13.
  • the inside diameter of the two pipe sections 4, 6 is the same size at this point.
  • An axially open, circumferential groove 15 with a T-shaped cross section is formed in the shoulder 13.
  • a sealing ring is arranged in the groove 15 and seals the ring channel 9 against the liquid channel 1.
  • a gas supply line 16 is formed in the boundary of the annular channel 9, which is delimited by the pipe section 4 having the end screw flange 5.
  • Gas passage openings 17 are formed in the boundary of the annular chamber 9, which is formed by the other tube section 6. The gas is conducted via the gas supply line in the tube section 4 into the annular chamber 9, is distributed there and reaches the liquid channel 1 via the gas passage openings 17.
  • the two pipe sections 4, 6 are put together, sealing rings being inserted into the grooves 12 and 15 provided in the pipe section 4.
  • the screw flanges 5, 7 are screwed together by means of the fastening screws 8 arranged along their circumference.
  • the aeration nozzle is installed in the device with which the wort or beer yeast is aerated or atomized.
  • the wort is supplied to the liquid channel so that it flows through the liquid channel 1 in the direction of flow 2.
  • a gas is in via the gas supply line 16 the ring channel 9 passed.
  • the pressure of the gas is chosen so that the gas is evenly distributed in the annular channel 9 and reaches the liquid channel 1 via the gas passage openings 17.
  • the liquid is enveloped by the gas streams like a net.
  • the gas / liquid mixture then continues to flow in the direction of flow 2 and reaches the tapered end of the liquid channel 1, in which the gas mixes with the liquid.
  • the gas / liquid mixture reaches the expansion space 3 via a pressure drop. Because of this pressure drop, the wort / air mixture is expanded. This creates an even bubble formation in the wort. This effect influences the flotation in such a way that a very uniform foam blanket formation is achieved.
  • the aeration nozzle can be removed again from the wort aeration device.
  • the aeration nozzle If the aeration nozzle is to be cleaned, it can be disassembled for this purpose and, after cleaning, reassembled and installed in the wort aeration device. Likewise, if one of the pipe sections is damaged or shows signs of wear, the ventilation nozzle can be disassembled, one of the pipe sections can be replaced, and the ventilation nozzle can be reassembled. If the aeration nozzle is installed again in the wort aeration device, the aeration process can begin again.

Abstract

The invention relates to a ventilation nozzle for fluids. In order to enable a simple cleaning and an inexpensive manufacture, the fluid channel in the ventilation nozzle is formed of two telescopically assembled tube sections. The two tube sections are connected to each other by radially outwardly protruding flanges and by fixing screws which are distributed along their circumference, with the flange of the tube section sealing the annular channel to the environment being mounted to its frontal end.

Description

Die Erfindung betrifft eine Belüftungsdüse für Flüssigkeiten, insbesondere zum Belüften und Zerstäuben von Bierwürze und Hefe mit einem sich in Strömungsrichtung verjüngenden Flüssigkeitskanal, mit einer Gaszuführleitung zum Beimischen eines Gases in den Flüssigkeitskanal und mit einem sich in Strömungsrichtung an die Verjüngung anschließenden Expansionsraum.The invention relates to a ventilation nozzle for liquids, in particular for aerating and atomizing beer wort and yeast with a liquid channel tapering in the flow direction, with a gas supply line for adding a gas into the liquid channel and with an expansion space adjoining the taper in the flow direction.

Eine solche Belüftungsdüse ist aus der Praxis bekannt. Es werden z.B. sogenannte Venturidüsen verwendet. Der durch die Venturidüse strömenden Flüssigkeit wird ein Gasstrom so zugeführt, daß sich das Gas mit der Flüssigkeit vermischt und die Flüssigkeit in einem sich an die Venturidüse anschließenden Expansionsraum zerstäubt wird.Such a ventilation nozzle is known from practice. E.g. so-called Venturi nozzles used. A gas flow is fed to the liquid flowing through the Venturi nozzle in such a way that the gas mixes with the liquid and the liquid is atomized in an expansion space adjoining the Venturi nozzle.

Eine solche Belüftungsdüse findet ihre Anwendung z.B.in der Brautechnik zur Würzebelüftung und zur Hefebelüftung. Wird die in die Düse einströmende Würze mit Luft vermischt, so erzielt man eine Feinverteilung der Luft in der Würze, wodurch der Flotationseffekt günstig beeinflußt wird. Bei einer sehr feinen Verteilung der Luftblasen in der Würze wird eine sehr gleichmäßige Schaumdeckenbildung bei der Flotation erzielt. Die verwendeten Düsen sind in der Regel einteilig aufgebaut. Daher ist ihr Inneres zur Reinigung nur schwer zugänglich.Such a ventilation nozzle is used e.g. in brewing technology for wort aeration and for yeast aeration. If the wort flowing into the nozzle is mixed with air, a fine distribution of the air in the wort is achieved, which has a favorable effect on the flotation effect. With a very fine distribution of the air bubbles in the wort, a very even foam blanket formation is achieved during the flotation. The nozzles used are usually constructed in one piece. Therefore, their interior is difficult to access for cleaning.

Im Hinblick auf diesen Stand der Technik liegt der Erfindung die Aufgabe zugrunde, eine Belüftungsdüse für Flüssigkeiten zu schaffen, die auch in ihrem Innern leicht zu reinigen ist, sowie einfach und kostengünstig in der Herstellung ist.In view of this prior art, the invention has for its object to provide a ventilation nozzle for liquids that is easy to clean inside, and is simple and inexpensive to manufacture.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Flüssigkeitskanal aus zwei derartig teleskopartig ineinander geschobenen Rohrabschnitten gebildet ist, daß die stark überlappenden Bereiche der Rohrabschnitte einen Ringkanal begrenzen, der durch auf der Außenseite des einen Rohrabschnitts und auf der Innenseite des anderen Rohrabschnitts vorgesehene, umlaufende Ausnehmungen gebildet und durch an den einander zugewandten stirnseitigen Enden der Rohrabschnitte vorgesehene Dichtungen zum Flüssigkeitskanal einerseits und zur Umgebung andererseits abgedichtet ist, daß der den Ringkanal vom Flüssigkeitskanal trennende Bereich des einen Rohrabschnitts mit Gasdurchtrittsöffnungen versehen ist, wobei die Gaszuführleitung in den Ringkanal mündet, und daß die beiden Rohrabschnitte mittels radial nach außen abstehender Schraubflansche und über deren Umfang verteilt angeordneter Befestigungsschrauben miteinander verbunden sind, wobei der Schraubflansch des den Ringkanal nach außen abdichtenden Rohrabschnitts an dessen stirnseitigem Ende befestigt ist.This object is achieved in that the liquid channel is formed from two telescopically pushed pipe sections in such a way that the strongly overlapping areas of the pipe sections limit an annular channel, which is provided by circumferential recesses provided on the outside of one pipe section and on the inside of the other pipe section formed and sealed by seals provided on the mutually facing ends of the pipe sections to the liquid channel on the one hand and to the environment on the other hand, that the area separating the ring channel from the liquid channel is provided with gas passage openings, the gas supply line opening into the ring channel, and that the the two pipe sections are connected to one another by means of radially outwardly projecting screw flanges and fastening screws distributed over their circumference, the screw flange of the annular channel na ch the outer sealing pipe section is attached to the front end.

Durch das Merkmal, daß der Flüssigkeitskanal aus zwei Rohrabschnitten gebildet ist, läßt sich der Flüssigkeitskanal in zwei Teile zerlegen, wodurch seine Innenseite leicht zugänglich wird und daher leicht zu reinigen ist. Da die überlappenden Bereiche einen Ringkanal begrenzen, ist die Innenseite dieses Ringkanals beim Auseinandernehmen der beiden Rohrabschnitte ebenfalls leicht zugänglich. Beim Auseinandernehmen der Rohrabschnitte ist auch der Bereich der Gasdurchtrittsöffnungen von beiden Seiten zugänglich, so daß auch die Gasdurchtrittsöffnungen leicht gereinigt werden können.Due to the feature that the liquid channel is formed from two pipe sections, the liquid channel can be broken down into two parts, as a result of which its inside is easily accessible and is therefore easy to clean. Since the overlapping areas delimit an annular channel, the inside of this annular channel is also easily accessible when the two pipe sections are taken apart. When the pipe sections are taken apart, the area of the gas passage openings is also accessible from both sides, so that the gas passage openings can also be easily cleaned.

Ferner ist die Herstellung der Belüftungsdüse durch den zweiteiligen Aufbau des Flüssigkeitskanals besonders einfach und somit kostengünstig. Der Ringkanal kann einfach dadurch hergestellt werden, daß der eine Teil des Rohrabschnitts, der den stirnseitigen Schraubflansch aufweist, ausgedreht wird, so daß die auf der Innenseite umlaufende Ausnehmung entsteht. Der andere Teil des Rohrabschnitts wird außen abgedreht, wodurch die umlaufende Ausnehmung auf der Außenseite dieses Rohrabschnitts entsteht. In letzterem können dann die Gasdurchtrittsöffnungen durch Bohrungen leicht eingebracht werden.Furthermore, the manufacture of the ventilation nozzle by the two-part construction of the liquid channel is particularly simple and therefore inexpensive. The ring channel can be produced simply by turning off a part of the tube section which has the screw flange on the end, so that the recess running around the inside is formed. The other part of the pipe section is turned off, whereby the circumferential recess is created on the outside of this pipe section. In the latter, the gas passage openings can then be easily introduced through bores.

Da die beiden Rohrabschnitte mittels radial nach außen abstehender Schraubflansche und über deren Umfang verteilt angeordnete Befestigungsschrauben miteinander verbunden sind, erfolgt der Zusammen- bzw. Auseinanderbau der beiden Teile besonders einfach und zuverlässig. Im zusammengebautem Zustand erfolgt eine zuverlässige und gleichmäßige Abdichtung des Ringkanals über den Umfang der einander zugewandten stirnseitigen Enden der Rohrabschnitte.Since the two pipe sections are connected to one another by means of radially outwardly projecting screw flanges and fastening screws distributed over their circumference, the assembly and disassembly of the two parts is particularly simple and reliable. When assembled, the ring channel is reliably and uniformly sealed over the circumference of the mutually facing end ends of the pipe sections.

Gemäß einer vorteilhaften Weiterbildung der Erfindung weist der stirnseitig angeordnete Schraubflansch auf seiner dem anderen Schraubflansch zugewandten Fläche eine umlaufende Nut auf, in der eine der Dichtungen für den Ringkanal eingesetzt ist. Eine solche Dichtung dichtet den Ringkanal zuverlässig gegen die Umgebung ab. Es kann z.B. ein handelsüblicher O-Ring verwendet werden, der, wenn seine Dichtwirkung nach längerem Gebrauch nachläßt, jederzeit problemlos durch einen neuen Dichtring ersetzt werden kann. Ferner ist es vorteilhaft, wenn der den stirnseitigen Schraubflansch aufweisende Rohrabschnitt ebenfalls die andere den Ringkanal abdichtende Dichtung aufweist, die in eine umlaufende Nut eingesetzt ist, welche in eine vom stirnseitigen Ende des Rohrabschnitts axial beabstandeten, radial nach innen ragenden und den Ringkanal axial begrenzenden Schulter versehen ist. Als Dichtring kann dann ebenfalls ein handelsüblicher, austauschbarer O-Ring verwendet werden, durch den der Ringkanal zuverlässig gegen den Flüssigkeitskanal abgedichtet wird. Beim Zusammenschrauben der beiden Schraubflansche wird an beiden einander zugewandten stirnseitigen Enden der Rohrabschnitte eine gleichmäßige und zuverlässige Abdichtung erzielt.According to an advantageous development of the invention, the screw flange arranged on the end face has a circumferential groove on its surface facing the other screw flange, in which one of the seals for the annular channel is inserted. Such a seal reliably seals the ring channel from the environment. For example, a commercially available O-ring can be used, which, if its sealing effect wears off after a long period of use, can easily be replaced by a new sealing ring at any time. It is also advantageous if the pipe section which has the screw flange on the end also has the other seal which seals the ring channel and is inserted into a circumferential groove. which is provided in a shoulder axially spaced from the front end of the tube section, projecting radially inward and axially delimiting the annular channel. A commercially available, exchangeable O-ring can then also be used as the sealing ring, by means of which the ring channel is reliably sealed against the liquid channel. When the two screw flanges are screwed together, a uniform and reliable seal is achieved at both facing ends of the pipe sections.

Vorteilhafterweise weist das stirnseitige Ende des anderen Rohrabschnitts einen radial nach außen weisenden, in die Schulter erstreckenden, mit der Dichtung zusammenwirkenden Dichtflansch auf, wobei der Innendurchmesser der beiden Rohrabschnitte an dieser Stelle gleich groß ist. Somit bilden die beiden zusammengesetzten Rohrabschnitte an dieser Stelle den Flüssigkeitskanal mit gleichmäßig verlaufendem, konstanten Innendurchmesser.Advantageously, the front end of the other tube section has a radially outward-pointing, shoulder-extending sealing flange which interacts with the seal, the inside diameter of the two tube sections being the same size at this point. Thus, the two assembled pipe sections form the liquid channel at this point with a uniform, constant inner diameter.

Auch ist es günstig, wenn die umlaufende Nut einen T-förmigen Querschnitt aufweist, da mit einer hierbei eingesetzten, einen ebensolchen Querschnitt aufweisenden Dichtung eine besonders effektive Dichtwirkung erzielt wird.It is also expedient if the circumferential groove has a T-shaped cross section, since a particularly effective sealing effect is achieved with a seal which has the same cross section.

Gemäß einer günstigen Weiterbildung der Erfindung ist die Gaszuführleitung an dem den stirnseitigen Schraubflansch aufweisenden Rohrabschnitt angeschlossen und mündet in den Ringkanal. Das Gas kann dann über den den stirnseitigen Schraubflansch aufweisenden Rohrabschnitt direkt in den Ringkanal geleitet werden, in welchem sich das Gas gleichmäßig verteilt und über die Gasdurchtrittsöffnungen in dem anderen Rohrabschnitt dem Flüssigkeitskanal zugeführt wird. Beim Auseinanderbau der Belüftungsdüse sind dann sowohl das Teil mit der Gaszuführleitung, als auch das Teil mit den Gasdurchtrittsöffnungen getrennt und leicht zugänglich.According to a favorable development of the invention, the gas supply line is connected to the pipe section which has the screw flange on the end face and opens into the annular channel. The gas can then be passed directly through the pipe section having the end screw flange into the ring channel, in which the gas is evenly distributed and fed to the liquid channel via the gas passage openings in the other pipe section becomes. When the ventilation nozzle is disassembled, both the part with the gas supply line and the part with the gas passage openings are separated and easily accessible.

Vorteilhafterweise ist der stirnseitige Schraubflansch als gesondertes Bauteil an den Rohrabschnitt vorzugsweise durch Verschweißen angesetzt. Er bildet einen Teil der radialen äußeren Begrenzung des Ringkanals. Somit können für den Schraubflansch kostengünstige Fertigbauteile verwendet werden. Ferner wird das Erstellen des den stirnseitigen Schraubflansch aufweisenden Rohrabschnitts vereinfacht, da nur ein Teil der auf der Innenseite umlaufenden Ausnehmung, also ein Teil der äußeren Begrenzung des Ringkanals, ausgedreht werden muß. Entspricht ferner der Innendurchmesser des stirnseitigen Schraubflansches dem Innendurchmesser der auf der Innenseite des Rohrabschnitts umlaufenden Ausnehmung, so hat die äußere Begrenzung des Ringkanals entlang der ganzen Länge einen gleichbleibenden Durchmesser.Advantageously, the end screw flange is attached as a separate component to the pipe section, preferably by welding. It forms part of the radial outer boundary of the ring channel. In this way, inexpensive prefabricated components can be used for the screw flange. Furthermore, the creation of the pipe section having the end screw flange is simplified since only a part of the circumferential recess on the inside, that is to say a part of the outer boundary of the ring channel, has to be unscrewed. If the inside diameter of the screw flange on the end corresponds to the inside diameter of the recess running around the inside of the pipe section, the outer boundary of the annular channel has a constant diameter along the entire length.

Auch ist es vorteilhaft, wenn der Schraubflansch des anderen Rohrabschnitts als gesondertes Bauteil radial auf den Rohrabschnitt aufgeschoben und, vorzugsweise durch Verschweißen, befestigt ist. Denn dann ist auch die Herstellung des den nicht stirnseitig angeordneten Schraubflansch aufweisenden Rohrabschnitts leicht herzustellen, da er abgesehen von der den Ringkanal nach innen begrenzenden Ausnehmung eine glatte Oberfläche aufweist. Ferner sind die gesonderten Bauteile im Handel erhältlich und kostengünstig. Ebenfalls ist es möglich, daß der Schraubflansch des anderen Rohrabschnitts axial über eine den Ringkanal axial begrenzende Wand hinausragt und ebenfalls einen Teil der radial äußeren Begrenzung des Ringkanals bildet. Hierdurch wird die umlaufende Ausnehmung, die auf der Innenseite des den stirnseitigen Schraubflansch aufweisenden Rohrabschnitts ausgebildet werden muß, noch weiter verkürzt.It is also advantageous if the screw flange of the other pipe section is pushed as a separate component radially onto the pipe section and fastened, preferably by welding. Because then it is also easy to manufacture the tube section which does not have the screw flange arranged on the end face, since apart from the recess which delimits the annular channel inwards, it has a smooth surface. Furthermore, the separate components are commercially available and inexpensive. It is also possible for the screw flange of the other pipe section to protrude axially beyond a wall axially delimiting the ring channel and likewise to form part of the radially outer delimitation of the ring channel. This will make the circumferential Recess, which must be formed on the inside of the pipe section having the end screw flange, is further shortened.

Auch können die beiden Schraubflansche identisch ausgebildet sein. Dies hat den Vorteil, daß bei der Herstellung der Belüftungsdüse nur ein Typ von Schraubflanschen vorhanden sein muß. Diese Schraubflansche können dann auf beide Rohrabschnitte einfach durch Verschweißen befestigt werden.The two screw flanges can also be of identical design. This has the advantage that only one type of screw flange must be present in the manufacture of the ventilation nozzle. These screw flanges can then be attached to both pipe sections simply by welding.

Ferner können die Schraubflansche etwa in der Mitte der Belüftungsdüse angeordnet sein. Dies vereinfacht die Lagerung der einzelnen Rohrabschnitte, da diese etwa gleich lang bemessen sind. Ferner wird somit eine günstige Aufteilung des Flüssigkeitskanals in auseinandergebautem Zustand erreicht, da keiner der Rohrabschnitte unnötig lang ist. Somit sind beide Flüssigkeitskanäle zum Reinigen leicht zugänglich. Auch ist der überlappende Bereich der beiden Rohrabschnitte in dieser Anordnung gering, so daß Zusammen- und Auseinanderbau der Belüftungsdüse einfach erfolgen kann, ohne daß die beiden Teil leicht miteinander verkanten oder gegeneinanderstoßen und somit beschädigt werden.Furthermore, the screw flanges can be arranged approximately in the middle of the ventilation nozzle. This simplifies the storage of the individual pipe sections, since they are approximately the same length. Furthermore, a favorable division of the liquid channel is achieved in the disassembled state, since none of the pipe sections is unnecessarily long. This means that both liquid channels are easily accessible for cleaning. The overlapping area of the two pipe sections in this arrangement is also small, so that the ventilation nozzle can be assembled and disassembled easily without the two parts easily tilting or bumping against one another and thus being damaged.

Im folgenden wird die Erfindung anhand der Zeichnung näher beschrieben.The invention is described in more detail below with reference to the drawing.

Die einzige Figur zeigt eine erfindungsgemäße, teilweise längsgeschnittene Belüftungsdüse.The single figure shows a partially longitudinally cut ventilation nozzle according to the invention.

Die erfindungsgemäße Belüftungsdüse weist einen Flüssigkeitskanal 1 auf, der sich in Strömungsrichtung 2 verjüngt. An den Flüssigkeitskanal 1 schließt sich in Strömungsrichtung 2 ein Expansionsraum 3 an. Der Flüssigkeitskanal 1 ist aus zwei Rohrabschnitten gebildet, wobei einer der Rohrabschnitte 4 einen stirnseitigen Schraubflansch 5 aufweist, der mit einem an dem anderen Rohrabschnitt 6 angebrachten Schraubflansch 7 mit über deren Umfang verteilt angeordneten Befestigungsschrauben 8 verschraubt ist. Die beiden Rohrabschnitte 4, 6 sind teleskopartig ineinandergeschoben. In ihrem überlappenden Bereich begrenzen die beiden Rohrabschnitte 4, 6 einen Ringkanal 9. Auf der Innenseite wird der Ringkanal durch eine auf der Außenseite des Rohrabschnitts 6 umlaufenden Ausnehmung 10 gebildet. Die äußere Begrenzung wird zum Teil durch eine Ausnehmung 11 auf der Innenseite des Rohrabschnitts 4 gebildet. Ein weiterer Teil der äußeren Begrenzung des Ringkanals 9 wird durch den Innendurchmesser des stirnseitigen Schraubflansches 5 gebildet. Der Innendurchmesser des Schraubflansches 5 entspricht dem Innendurchmesser der Ausnehmung 11, so daß die äußere Begrenzung der Ringkammer 9 einen gleichbleibenden Durchmesser aufweist. Ein weiterer geringer Teil der Außenbegrenzung der Ringkammer 9 ist durch den Innendurchmesser des Schraubflansches 7 gebildet, der passend zu dem Innendurchmesser des Schraubflansches 5 ausgebildet ist. Die Schraubflansche 5 und 7 sind gleiche Bauteile. Der Schraubflansch 5 ist durch Verschweißen an dem Rohrabschnitt 4 angesetzt. Der Schraubflansch 7 ist durch Verschweißen axial auf den Mantel des Rohrabschnitts 6 angesetzt. Die Schraubflansche 5, 7 sind etwa in der Mitte der Belüftungsdüse angeordnet.The ventilation nozzle according to the invention has a liquid channel 1, which tapers in the direction of flow 2. An expansion space 3 adjoins the liquid channel 1 in the flow direction 2. Of the Liquid channel 1 is formed from two pipe sections, one of the pipe sections 4 having a screw flange 5 on the end face, which is screwed to a screw flange 7 attached to the other pipe section 6 with fastening screws 8 distributed over its circumference. The two pipe sections 4, 6 are telescoped. In their overlapping area, the two pipe sections 4, 6 delimit an annular channel 9. On the inside, the annular channel is formed by a recess 10 running around the outside of the pipe section 6. The outer boundary is partially formed by a recess 11 on the inside of the pipe section 4. Another part of the outer boundary of the ring channel 9 is formed by the inner diameter of the screw flange 5 on the end face. The inner diameter of the screw flange 5 corresponds to the inner diameter of the recess 11, so that the outer boundary of the annular chamber 9 has a constant diameter. Another small part of the outer boundary of the annular chamber 9 is formed by the inner diameter of the screw flange 7, which is designed to match the inner diameter of the screw flange 5. The screw flanges 5 and 7 are the same components. The screw flange 5 is attached to the pipe section 4 by welding. The screw flange 7 is axially attached to the jacket of the pipe section 6 by welding. The screw flanges 5, 7 are arranged approximately in the middle of the ventilation nozzle.

Der stirnseitig angeordnete Schraubflansch 5 weist auf seiner dem Flansch 7 zugewandten Fläche eine umlaufende Nut 12 mit T-förmigem Querschnitt auf, in welche ein Dichtring eingesetzt ist. Durch diese Dichtung 12 ist der Ringkanal 9 nach außen abgedichtet.The screw flange 5 arranged on the face side has on its surface facing the flange 7 a circumferential groove 12 with a T-shaped cross section, into which a sealing ring is inserted. The ring channel 9 is sealed to the outside by this seal 12.

Der Rohrabschnitt 4 weist eine von seinem stirnseitigen Ende axial beabstandete, radial nach innen ragende Schulter 13 auf, die den Ringkanal 9 axial begrenzt. Das stirnseitige Ende des anderen Rohrabschnitts 6 weist einen radial nach außen weisenden, sich in die Schulter 13 erstreckenden Dichtflansch 14 auf. Der Innendurchmesser der beiden Rohrabschnitte 4, 6 ist an dieser Stelle gleich groß. In der Schulter 13 ist eine axial offene, umlaufende Nut 15 mit einem T-förmigen Querschnitt ausgebildet. In der Nut 15 ist ein Dichtring angeordnet, welcher den Ringkanal 9 gegen den Flüssigkeitskanal 1 abdichtet.The tube section 4 has a radially inwardly projecting shoulder 13 which is axially spaced from its end face and which axially delimits the annular channel 9. The front end of the other tube section 6 has a radially outward-pointing sealing flange 14 which extends into the shoulder 13. The inside diameter of the two pipe sections 4, 6 is the same size at this point. An axially open, circumferential groove 15 with a T-shaped cross section is formed in the shoulder 13. A sealing ring is arranged in the groove 15 and seals the ring channel 9 against the liquid channel 1.

In der Begrenzung des Ringkanals 9, die von dem den stirnseitigen Schraubflansch 5 aufweisenden Rohrabschnitt 4 begrenzt wird, ist eine Gaszuführleitung 16 ausgebildet. In der Begrenzung der Ringkammer 9, die von dem anderen Rohrabschnitt 6 gebildet wird, sind Gasdurchtrittsöffnungen 17 ausgebildet. Das Gas wird über die Gaszuführleitung in dem Rohrabschnitt 4 in die Ringkammer 9 geleitet, verteilt sich dort und gelangt über die Gasdurchtrittsöffnungen 17 in den Flüssigkeitskanal 1.A gas supply line 16 is formed in the boundary of the annular channel 9, which is delimited by the pipe section 4 having the end screw flange 5. Gas passage openings 17 are formed in the boundary of the annular chamber 9, which is formed by the other tube section 6. The gas is conducted via the gas supply line in the tube section 4 into the annular chamber 9, is distributed there and reaches the liquid channel 1 via the gas passage openings 17.

Im folgenden wird die Funktionsweise der erfindungsgemäßen Vorrichtung beschrieben. Zum Einbau werden die beiden Rohrabschnitte 4, 6 zusammengesetzt, wobei in die in dem Rohrabschnitt 4 vorgesehenen Nuten 12 und 15 Dichtringe eingelegt werden. Dann werden die Schraubflansche 5, 7 mittels der entlang ihres Umfangs angeordneten Befestigungsschrauben 8 miteinander verschraubt. Dann wird die Belüftungsdüse in die Vorrichtung, mit der die Bierwürze oder Bierhefe belüftet bzw. zerstäubt wird, eingebaut. Dem Flüssigkeitskanal wird die Würze zugeführt, so daß sie den Flüssigkeitskanal 1 in Strömungsrichtung 2 durchströmt. Über die Gaszuführleitung 16 wird ein Gas in den Ringkanal 9 geleitet. Der Druck des Gases wird so gewählt, daß sich das Gas gleichmäßig in dem Ringkanal 9 verteilt und über die Gasdurchtrittsöffnungen 17 in den Flüssigkeitskanal 1 gelangt. Dabei wird die Flüssigkeit netzartig von den Gasströmen umhüllt. Die Gas/Flüssigkeits-Mischung fließt dann in Strömungsrichtung 2 weiter und gelangt in das sich verjüngende Ende des Flüssigkeitskanals 1, in welchem sich das Gas mit der Flüssigkeit durchmischt. Am Ende des verjüngten Flüssigkeitskanals 1 gelangt die Gas/Flüssigkeits-Mischung über ein Druckgefälle in den Expansionsraum 3. Aufgrund dieses Druckgefälles wird die Würze/Luft-Mischung expandiert. Dabei wird in der Würze eine gleichmäßige Blasenbildung erzeugt. Durch diesen Effekt wird die Flotation so beeinflußt, daß eine sehr gleichmäßige Schaumdeckenbildung erreicht wird. Bei Beenden dieses Mischvorganges kann die Belüftungsdüse wieder aus der Würzebelüftungsvorrichtung ausgebaut werden. Falls die Belüftungsdüse gereinigt werden soll, kann sie zu diesem Zweck auseinandergebaut und nach der Reinigung wieder zusammengebaut und in die Würzebelüftungsvorrichtung eingebaut werden. Ebenso kann, falls einer der Rohrabschnitte eine Beschädigung oder Abnutzerscheinung aufweist, die Belüftungsdüse auseinandergebaut werden, einer der Rohrabschnitte ersetzt und die Belüftungsdüse wieder zusammengebaut werden. Ist die Belüftungsdüse wieder in die Würzebelüftungsvorrichtung eingebaut, so kann der Belüftungsvorgang von neuem beginnen.The mode of operation of the device according to the invention is described below. For installation, the two pipe sections 4, 6 are put together, sealing rings being inserted into the grooves 12 and 15 provided in the pipe section 4. Then the screw flanges 5, 7 are screwed together by means of the fastening screws 8 arranged along their circumference. Then the aeration nozzle is installed in the device with which the wort or beer yeast is aerated or atomized. The wort is supplied to the liquid channel so that it flows through the liquid channel 1 in the direction of flow 2. A gas is in via the gas supply line 16 the ring channel 9 passed. The pressure of the gas is chosen so that the gas is evenly distributed in the annular channel 9 and reaches the liquid channel 1 via the gas passage openings 17. The liquid is enveloped by the gas streams like a net. The gas / liquid mixture then continues to flow in the direction of flow 2 and reaches the tapered end of the liquid channel 1, in which the gas mixes with the liquid. At the end of the tapered liquid channel 1, the gas / liquid mixture reaches the expansion space 3 via a pressure drop. Because of this pressure drop, the wort / air mixture is expanded. This creates an even bubble formation in the wort. This effect influences the flotation in such a way that a very uniform foam blanket formation is achieved. When this mixing process has ended, the aeration nozzle can be removed again from the wort aeration device. If the aeration nozzle is to be cleaned, it can be disassembled for this purpose and, after cleaning, reassembled and installed in the wort aeration device. Likewise, if one of the pipe sections is damaged or shows signs of wear, the ventilation nozzle can be disassembled, one of the pipe sections can be replaced, and the ventilation nozzle can be reassembled. If the aeration nozzle is installed again in the wort aeration device, the aeration process can begin again.

Claims (12)

  1. Aerating nozzle for liquids, in particular for aerating and atomizing beer wort and yeast, with a liquid channel (1) which tapers in the direction of flow, with a gas feed line (16) for adding a gas to the liquid channel (1), and with an expansion space (3) adjoining the tapered portion in the direction of flow, characterized in that the liquid channel (1) is formed from two tubular sections (4, 6) which are pushed one into the other telescopically in such a way that the overlapping regions of the tubular sections (4, 6) bound an annular channel (9) which is formed by recesses which are provided on, and run around the outside of one tubular section (6) and the inside of the other tubular section (4) and is sealed from the liquid channel (1), on the one hand, and from the surroundings, on the other hand, by seals (12, 15) which are provided on the mutually facing ends of the tubular sections (4, 6), in that that region of one tubular section (6) which separates the annular channel (9) from the liquid channel (1) is provided with gas passage openings (17), the gas feed line (16) opening into the annular channel (9), and in that the two tubular sections (4, 6) are connected to each other by means of screwed flanges (5, 7) projecting radially outwards and fastening screws (8) distributed over the circumference of said flanges, the screwed flange (5) of that tubular section (4) which seals the annular channel (9) from the outside being fastened to the end of said section.
  2. Aerating nozzle according to Claim 1, characterized in that the screwed flange (5) which is arranged on the end side has, on its surface facing the other screwed flange (7), an encircling groove (12) in which one of the seals for the annular channel (9) is inserted.
  3. Aerating nozzle according to Claim 1 or 2, characterized in that that tubular section (4) which has the end-side screwed flange (5) likewise has the other seal which seals the annular channel (9) and is inserted into an encircling groove (15) which is provided in a shoulder (13) which is axially spaced apart from the end of the tubular section (4), protrudes radially inwards and axially bounds the annular channel (9).
  4. Aerating nozzle according to Claim 2 or 3, characterized in that the encircling groove (12, 15) has a T-shaped cross-section.
  5. Aerating nozzle according to Claim 3 or 4, characterized in that the end of the other tubular section (6) has a sealing flange (14) which points radially outwards, extends into the shoulder (13) and interacts with the seal, the inside diameter of the two tubular sections (4, 6) being of the same size at this point.
  6. Aerating nozzle according to one of Claims 1 to 5, characterized in that the gas feed line (16) is connected to that tubular section (4) which has the end-side screwed flange (5), and opens into the annular channel.
  7. Aerating nozzle according to one of Claims 1 to 6, characterized in that the end-side screwed flange (5), as a separate component, is fitted axially onto the tubular section (4), preferably by welding, and forms part of the radially outer boundary of the annular channel (9).
  8. Aerating nozzle according to Claim 7, characterized in that the inside diameter of the end-side screwed flange (5) corresponds to the inside diameter of the recess running around the inside of the tubular section (4).
  9. Aerating nozzle according to one of Claims 1 to 8, characterized in that the screwed flange (7) of the other tubular section (6), as a separate component, is pushed radially onto the tubular section (6) and is fastened, preferably by welding.
  10. Aerating nozzle according to one of Claims 1 to 9, characterized in that the screwed flange (7) of the other tubular section (6) protrudes axially over a wall (18) which axially bounds the annular channel (9), and likewise forms part of the radial, outer boundary of the annular channel (9).
  11. Aerating nozzle according to one of Claims 1 to 10, characterized in that the two screwed flanges (5, 7) are of identical design.
  12. Aerating nozzle according to one of Claims 1 to 11, characterized in that the screwed flanges (5, 7) are arranged approximately in the centre of the aerating nozzle (1).
EP92115751A 1991-09-18 1992-09-15 Aerating nozzle for liquids Expired - Lifetime EP0533104B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9111657U 1991-09-18
DE9111657U DE9111657U1 (en) 1991-09-18 1991-09-18

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EP0533104A1 EP0533104A1 (en) 1993-03-24
EP0533104B1 true EP0533104B1 (en) 1995-12-13

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US (1) US5240650A (en)
EP (1) EP0533104B1 (en)
JP (1) JPH06102012B2 (en)
CN (1) CN1030040C (en)
AT (1) ATE131412T1 (en)
AU (1) AU654043B2 (en)
BR (1) BR9203646A (en)
DE (2) DE9111657U1 (en)

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DE9111657U1 (en) 1991-11-14
US5240650A (en) 1993-08-31
AU2359492A (en) 1993-03-25
ATE131412T1 (en) 1995-12-15
CN1030040C (en) 1995-10-18
AU654043B2 (en) 1994-10-20
EP0533104A1 (en) 1993-03-24
JPH06102012B2 (en) 1994-12-14
JPH0647316A (en) 1994-02-22
CN1071855A (en) 1993-05-12
BR9203646A (en) 1993-04-06
DE59204668D1 (en) 1996-01-25

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