EP3551335B1 - Buse d'éjection de liquide - Google Patents

Buse d'éjection de liquide Download PDF

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Publication number
EP3551335B1
EP3551335B1 EP17828660.5A EP17828660A EP3551335B1 EP 3551335 B1 EP3551335 B1 EP 3551335B1 EP 17828660 A EP17828660 A EP 17828660A EP 3551335 B1 EP3551335 B1 EP 3551335B1
Authority
EP
European Patent Office
Prior art keywords
jet
liquid
housing
jet nozzle
nozzle according
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.)
Active
Application number
EP17828660.5A
Other languages
German (de)
English (en)
Other versions
EP3551335A1 (fr
Inventor
Felix Lugtenberg
Richard Pauwels
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.)
Aebi Schmidt Nederland BV
Original Assignee
Aebi Schmidt Nederland BV
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Publication date
Application filed by Aebi Schmidt Nederland BV filed Critical Aebi Schmidt Nederland BV
Publication of EP3551335A1 publication Critical patent/EP3551335A1/fr
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Publication of EP3551335B1 publication Critical patent/EP3551335B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3006—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the controlling element being actuated by the pressure of the fluid to be sprayed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • B05B1/06—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in annular, tubular or hollow conical form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3013—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the controlling element being a lift valve
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
    • B05B1/3402—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to avoid or to reduce turbulencies, e.g. comprising fluid flow straightening means

Definitions

  • the present invention relates to a liquid jet nozzle, comprising a housing with a liquid inlet opening, a jet outlet opening and a jet shaping region with a flow channel, the passage cross section of which can be changed, arranged between the liquid inlet opening and the jet outlet opening.
  • jet nozzle is for example from the DE 102014018130 A1 known.
  • spray nozzles which are intended to form fine droplets or a liquid mist
  • jet nozzles depend on the formation of a liquid jet that does not disintegrate over the greatest possible distance.
  • the from the DE 102014018130 A1 known jet nozzle has a throttle sleeve which is displaceable relative to the housing and the jet shaping body and which is pretensioned by means of a spring device against the direction of flow around the jet shaping body, which has an annular piston section guided in a pre-pressure chamber of the housing communicating with the liquid inlet and an annular piston section which interacts with the cone area of the jet shaping body, together with this one having an annular passage cross-section defining passage with a cross-sectional area that changes as a function of the respective operating state.
  • the FR 2 916 657 A1 discloses a liquid distribution nozzle equipped with a closure device.
  • This comprises two components, namely a base body and a closure part.
  • the base body which can be attached to a liquid container, comprises a pipe section through which a flow can flow and a core which is arranged in the area of the liquid outlet and tapering off in a cone, with an annular passage cross-section between the pipe section and the core.
  • the closure part which is made of a flexible material (e.g. elastomer), has a jacket section surrounding the pipe section on the outside and a funnel section molded thereon. Depending on the liquid throughput through the annular space, the funnel section of the closure part expands and narrows, with the funnel section resting on the core without liquid throughput and thus closing the liquid distribution nozzle.
  • the EP 2 949 593 A1 discloses a drop dispenser which is structurally very similar to the liquid distribution nozzle recognized above according to the FR 2 916 657 A1 .
  • the EP 2 478 773 A1 discloses a valve system as it is used in machines such as chocolate, etc. which are used for pouring flowable masses.
  • the valve system comprises an adapter and several (for example four) valve flaps which are fixed to this and joined together to form a valve. These can be shaped and deformed under the action of the casting compound. Through the specific design of the valve flaps (e.g. by means of ribs), these can For example, twist themselves when opening in such a way that the casting compound flowing between you is given a twist.
  • the present invention has set itself the goal of providing a jet nozzle of the type specified at the outset which is further improved in terms of the operating behavior, the aim being in particular to improve the reproducibility of jet formation with changing liquid throughputs.
  • the passage cross-section is defined by an elastically deformable funnel membrane permanently attached to the housing on its outer circumference (largest circumference).
  • an elastically deformable funnel membrane permanently attached to the housing on its outer circumference (largest circumference).
  • the funnel membrane expands radially - in its area downstream of the sealed connection on the housing - and when the liquid pressure drops, the funnel membrane contracts radially there.
  • the elastically deformable funnel membrane reacts immediately and particularly sensitively to any change in the prevailing operating conditions.
  • the housing which projects into the funnel membrane Beam shaping body arranged.
  • An annular flow channel is formed between the housing and the jet shaping body over at least part of its axial length.
  • the said jet shaping body has an end region which tapers in the direction of the jet outlet opening, particularly preferably essentially conical and tapering to a point. This creates such an annular passage cross-section defined radially on the inside by the jet shaping body and radially on the outside by the funnel membrane, the cross-sectional area of which decreases more or less steadily over an axial extent in the direction of flow of the jet nozzle with simultaneous orientation of the flowing liquid with a component directed radially inward.
  • the funnel membrane - with a suitable other design of the liquid jet nozzle can simultaneously also reliably perform the function of a closure when the liquid throughput has decreased to zero.
  • the elastic ring-shaped funnel membrane can - with its inner circumference - rest on the outside of the jet-shaping body and in this way completely close the (ring-shaped) passage cross-section.
  • a separate closure device can also be arranged upstream of the elastic funnel membrane. If necessary, this closure device can in turn comprise an elastic membrane which fulfills a non-return function.
  • the jet shaped body is arranged immovably in the housing.
  • Spoke-like structures which are provided upstream of the funnel membrane in an annular space existing between the housing and the jet-shaping body and hold the jet-shaping body, can furthermore also form flow guide surfaces through suitable dimensioning and / or profiling.
  • the funnel membrane is particularly preferably fixed immovably in the housing on its outer circumference.
  • the liquid jet nozzle according to the invention be manufactured with a particularly low manufacturing cost.
  • the funnel membrane has a bead-shaped outer edge region. This is favorable with regard to a tight and permanent fixation of the funnel membrane on its outer circumference in the housing of the liquid jet nozzle with simple means.
  • a detachable retaining ring can be provided in the area of the jet outlet opening of the housing, which acts on a clamping sleeve, which in turn fixes the outer circumference of the funnel membrane in the housing (on the bead-shaped outer edge area of the funnel membrane).
  • the liquid jet nozzle shown in the drawing comprises a housing 1 which has a liquid inlet opening 2 and a jet outlet opening 3.
  • the liquid inlet opening 2 and the jet outlet opening 3 lie opposite one another - based on the flow direction A - so that the liquid jet formed in a jet shape area S leaves the jet nozzle in the same direction in which the liquid enters the jet nozzle through the liquid inlet opening 2.
  • the housing 1 comprises an approximately sleeve-shaped base body 4 and a retaining ring 5 screwed onto the base body 4 at the end in the region of the jet outlet opening 3 of the housing 1, the function of which is explained in detail below.
  • a jet shaping body 6 extends along its axis. This has a substantially cylindrical main region 7 and a conical design which tapers in the direction of the jet outlet opening 3 and is arranged downstream of this in the flow direction A and end region 9 ending in a tip 8. Between the jet shaping body 6 and the base body 4 of the housing 1 there is an annular flow channel 10 for the liquid, so that the jet shaping body 6 can be flowed around by the latter.
  • the beam shaping body 6 is in the base body 4 of the housing 1 by means of several web-shaped, the annular flow channel 10 bridging spokes 11 fixed. These extend in the axial direction over a substantial part of the main region 7 of the jet shaping body 6 and in this way function as flow guide surfaces which ensure an axial flow through the flow channel 10.
  • An elastically deformable funnel-shaped membrane 12 is arranged in the annular flow channel 10 in such a way that it tapers in the flow direction A from an outer circumference to an inner circumference.
  • the funnel membrane 12 is tightly connected to the housing 1 at its outer circumference 13.
  • a bead-shaped edge region 14 extends along the outer circumference 13 of the funnel membrane 12. This is clamped between a clamping ring 15 and a clamping sleeve 16, both of which are received in the base body 4 of the housing 1 and at the end each one is attached to the bead-shaped design of the edge region 14 of the Have funnel membrane 12 adapted profiling.
  • the clamping ring 15 is supported on a step 17 of the base body 4 of the housing 1;
  • the retaining ring 5 already mentioned above acts on the clamping sleeve 16.
  • a fixing of the retaining ring on the base body 4 of the housing 1 in the set position can be ensured via a grub screw (not shown) that can be screwed into the threaded bore 18.
  • the funnel membrane 12 the axial extent of which is dimensioned approximately in the same order of magnitude as its outer diameter, is dimensioned so that it can be without a supply of liquid to the Liquid inlet opening 2 rests with its inner circumference 19 on the outside of the jet shaping body 6, specifically on its conical end region 9 (cf. the operating state illustrated in the drawing). In this way, the funnel membrane 12 and jet shaping body 6 interact with one another to form a closure device 27.
  • the inner circumference 19 of the funnel membrane 12 lifts off the jet shaping body 6 and releases an annular passage opening, the cross-sectional area of which depends on the amount of liquid supplied or on the pressure prevailing upstream of the annular diaphragm 12.
  • the drawing shows the jet nozzle according to the relevant exemplary embodiment in the area relevant to the present invention. Accordingly, the jet nozzle can be designed to be more extensive, in particular on the inlet side, for example prepared for connection to a liquid supply or the like.
  • the jet nozzle according to the invention illustrated according to a second exemplary embodiment has to a considerable extent structural and functional parallels to the jet nozzle Fig. 1 on. These are expressed through the use of identical reference symbols for matching, functionally identical or corresponding components. A (renewed) description of the jet nozzle is dispensed with within the scope of the agreement and instead refer to the explanation of the above Fig. 1 referenced. As deviations to the jet nozzle after Fig. 1 the following aspects and peculiarities are to be emphasized here:
  • the beam shaping body 6 is constructed in two parts.
  • the second part 39 of the jet shaping body 6 is in turn part of a complex one-piece component, which additionally comprises a supporting ring 41 surrounding the jet shaping body 6 with the formation of an annular flow channel 10 at a distance, as well as several flat spokes 11, which the second part 39 of the jet shaping body 6 on the Support support ring 41.
  • the flat spokes 11 are in the present case in the form of twisted flow guide surfaces; they have the effect that a swirl flow is established in the annular flow channel 10.
  • the complex component consisting of the second part 39 of the jet shaping body 6, support ring 41 and spokes 11, an axial orientation of the flow guide surfaces so that no swirl flow is generated is possible.
  • the funnel membrane 12 the axial extent of which is again approximately of the same order of magnitude as its outer diameter, is accordingly with its edge region 14 between the - inserted into the housing 1 - supporting ring 41 and the clamping sleeve 16 clamped.
  • the support ring 41 and the clamping sleeve 16 are adapted to the profile of the edge region 14 of the funnel membrane 12.
  • the base body 4 of the housing 1 of the jet nozzle has a plurality of essentially radial openings 47 in the jet shaping region S.
  • the clamping sleeve 16 for its part has a corresponding number of openings 43 which are aligned with those of the base body 4 of the housing 1.
  • the interior of the housing 1 is laterally ventilated in the jet shape area S, which on the one hand supports undisturbed jet formation with different throughputs and orientations of the jet nozzle and on the other hand favors the drainage of any water that may have accumulated.
  • a rotation of the clamping sleeve 16 and the base body 4 of the housing 1 relative to one another is harmless for the ventilation mentioned if the base body 4 of the housing 1 and / or the clamping sleeve 16 have an annular circumferential groove 44 causing air distribution in the area of the separating surface.
  • the end 45 of the housing 1 of the jet nozzle assigned to the liquid inlet opening 2 is specifically designed for a reliable, tight connection with a hose or pipe.
  • the base body 4 of the housing 1 has two circumferential ribs 46 in that area.

Landscapes

  • Nozzles (AREA)

Claims (12)

  1. Buse d'éjection de liquide, dotée des caractéristiques suivantes :
    - elle comprend un boîtier (1) doté d'une ouverture d'entrée de liquide (2) et d'une ouverture de sortie de jet (3) ;
    - dans le boîtier (1) est disposé un corps de formage de jet contournable (6) ayant une partie terminale (9) se rétrécissant vers l'ouverture de sortie de jet ;
    - entre le boîtier (1) et le corps de formage de jet (6), un canal d'écoulement de forme annulaire (10) est constitué sur au moins une partie de sa longueur axiale ;
    - entre l'ouverture d'entrée de liquide (2) et l'ouverture de sortie de jet (3), est disposée une zone de formage de jet (S) comportant un canal d'écoulement dont la section transversale de passage est modifiable ;
    - pour ce faire, dans la zone de formage de jet (S), le canal d'écoulement est limité radialement à l'extérieur par une membrane en entonnoir (12) déformable élastiquement, raccordé par sa circonférence extérieure de manière permanente hermétiquement au boîtier (1) et se rétrécissant dans le sens de traversée de flux (A) et qui, pour la modification automatique de la section transversale de passage, se dilate radialement en fonction de la pression de liquide locale en cas d'augmentation de la pression de liquide et se rétracte radialement en cas de baisse de la pression de liquide ;
    - la section transversale de passage modifiable est réalisée en forme annulaire du fait que le corps de formage de jet (6) rentre dans la membrane en entonnoir (12),
    - le boîtier (1) présente au moins une percée (47) à travers laquelle l'intérieur du boîtier (1) est ventilé latéralement dans la zone de formage de jet (S) .
  2. Buse d'éjection de liquide selon la revendication 1, caractérisée en ce que la partie terminale se rétrécissant (9) du corps de formage de jet (6) est réalisée sensiblement en forme conique, le corps de formage de jet (7) convergeant de préférence en une pointe (8) dans le sens d'écoulement.
  3. Buse d'éjection de liquide selon la revendication 1 ou la revendication 2, caractérisée en ce que le corps de formage de jet (6) est disposé de manière inamovible dans le boîtier (1).
  4. Buse d'éjection de liquide selon une des revendications 1 à 3, caractérisée en ce que, en amont de la membrane en entonnoir (12), sont prévus des rayons (11) supportant le corps de formage de jet (6) dans un espace annulaire existant entre le boîtier (1) et le corps de formage de jet (6) et qui sont réalisés très préférentiellement sous forme de surfaces conductrices d'écoulement.
  5. Buse d'éjection de liquide selon la revendication 4, caractérisée en ce que les rayons (11) présentent des percées réalisées sous forme de fentes (42).
  6. Buse d'éjection de liquide selon une des revendications 1 à 5, caractérisée en ce qu'elle est réalisée sous forme d'une buse de fermeture comportant un dispositif de fermeture (27) disposé en aval de l'ouverture d'entrée de liquide (2) et pouvant être ouvert ou fermé en fonction d'une pression préliminaire.
  7. Buse d'éjection de liquide selon la revendication 6, caractérisée en ce que la membrane en entonnoir (12) constitue une partie du dispositif de fermeture (27) par le fait que, sans apport de liquide vers l'ouverture d'entrée de liquide (2), elle repose par sa circonférence intérieure (19) à l'extérieur sur le corps de formage de jet (6), la circonférence intérieure (19) de la membrane en entonnoir (12) se soulevant du corps de formage de jet (6) et libérant une ouverture de passage de forme annulaire en cas d'apport de liquide vers l'ouverture d'entrée de liquide (2).
  8. Buse d'éjection de liquide selon la revendication 7, caractérisée en ce que la circonférence intérieure (19) de la membrane entonnoir (12) repose au niveau du corps de formage de jet (6) dans sa partie terminale se rétrécissant (9).
  9. Buse d'éjection de liquide selon une des revendications 1 à 8, caractérisée en ce que l'épaisseur de paroi de la membrane en entonnoir (12) diminue dans le sens de traversée de flux.
  10. Buse d'éjection de liquide selon une des revendications 1 à 9, caractérisée en ce que la membrane en entonnoir (12) est fixée par sa circonférence extérieure (13) de manière inamovible dans le boîtier (1).
  11. Buse d'éjection de liquide selon une des revendications 1 à 10, caractérisée en ce que la membrane en entonnoir (12) présente une partie périphérique extérieure réalisée en forme de bourrelet (14).
  12. Buse d'éjection de liquide selon une des revendications 1 à 11, caractérisée en ce que le boîtier (1) est traversé axialement par le flux du fait que l'ouverture d'entrée de liquide (2) est disposée à l'opposé de l'ouverture de sortie de jet (3).
EP17828660.5A 2016-12-09 2017-12-05 Buse d'éjection de liquide Active EP3551335B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016123994.1A DE102016123994A1 (de) 2016-12-09 2016-12-09 Flüssigkeitsstrahldüse
PCT/EP2017/081450 WO2018104266A1 (fr) 2016-12-09 2017-12-05 Buse d'éjection de liquide

Publications (2)

Publication Number Publication Date
EP3551335A1 EP3551335A1 (fr) 2019-10-16
EP3551335B1 true EP3551335B1 (fr) 2021-06-16

Family

ID=60954989

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17828660.5A Active EP3551335B1 (fr) 2016-12-09 2017-12-05 Buse d'éjection de liquide

Country Status (4)

Country Link
US (1) US20190299225A1 (fr)
EP (1) EP3551335B1 (fr)
DE (1) DE102016123994A1 (fr)
WO (1) WO2018104266A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114178065A (zh) * 2021-11-22 2022-03-15 拉思丁科技(深圳)有限公司 一种高压水射流宝石喷嘴

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2916657B1 (fr) * 2007-05-30 2009-08-21 Techniplast Sarl Dispositif d'obturation d'une buse de distribution de fluide
DK2478773T3 (da) * 2011-01-25 2013-08-26 Buehler Ag Støbemaskineventil
FR3021303A1 (fr) * 2014-05-26 2015-11-27 Techniplast Appareil de distribution de gouttes ameliore
DE102014018130A1 (de) 2014-12-09 2016-06-09 Aebi Schmidt Nederland Bv Flüssigkeitsstrahl-Verschlussdüse

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
US20190299225A1 (en) 2019-10-03
EP3551335A1 (fr) 2019-10-16
DE102016123994A1 (de) 2018-06-14
WO2018104266A1 (fr) 2018-06-14

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