EP2527041B1 - Connector for a static spray mixer - Google Patents

Connector for a static spray mixer Download PDF

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Publication number
EP2527041B1
EP2527041B1 EP12158032.8A EP12158032A EP2527041B1 EP 2527041 B1 EP2527041 B1 EP 2527041B1 EP 12158032 A EP12158032 A EP 12158032A EP 2527041 B1 EP2527041 B1 EP 2527041B1
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EP
European Patent Office
Prior art keywords
mixer housing
region
combination
mixer
accordance
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
EP12158032.8A
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German (de)
French (fr)
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EP2527041A1 (en
Inventor
Andreas Hiemer
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.)
Medmix Switzerland AG
Original Assignee
Sulzer Mixpac AG
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Filing date
Publication date
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Priority to EP12158032.8A priority Critical patent/EP2527041B1/en
Publication of EP2527041A1 publication Critical patent/EP2527041A1/en
Application granted granted Critical
Publication of EP2527041B1 publication Critical patent/EP2527041B1/en
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Classifications

    • 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
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/432—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction with means for dividing the material flow into separate sub-flows and for repositioning and recombining these sub-flows; Cross-mixing, e.g. conducting the outer layer of the material nearer to the axis of the tube or vice-versa
    • B01F25/4321—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction with means for dividing the material flow into separate sub-flows and for repositioning and recombining these sub-flows; Cross-mixing, e.g. conducting the outer layer of the material nearer to the axis of the tube or vice-versa the subflows consisting of at least two flat layers which are recombined, e.g. using means having restriction or expansion zones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0408—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing two or more liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
    • B05B7/062—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
    • B05B7/062—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet
    • B05B7/066—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet with an inner liquid outlet surrounded by at least one annular gas outlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
    • B05B7/0861—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with one single jet constituted by a liquid or a mixture containing a liquid and several gas jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/10—Spray pistols; Apparatus for discharge producing a swirling discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/60—Arrangements for mounting, supporting or holding spraying apparatus
    • B05B15/65—Mounting arrangements for fluid connection of the spraying apparatus or its outlets to flow conduits
    • B05B15/658—Mounting arrangements for fluid connection of the spraying apparatus or its outlets to flow conduits the spraying apparatus or its outlet axis being perpendicular to the flow conduit

Definitions

  • the invention relates to a combination of an intermediate piece with a static spray mixer.
  • Static mixers for mixing at least two flowable components are for example in the EP-A-0 749 776 and in the EP-A-0 815 929 described. Despite their simple, material-saving construction of their mixer structure, these very compact mixers produce good mixing results, especially when mixing highly viscous substances such as sealants, two-component foams, or two-component adhesives. Typically, such static mixers are designed for single use and are often used for curing products in which the mixer practically can not be cleaned.
  • the two components are atomized at the outlet of the mixer by exposure to a medium such as air and can then be applied in the form of a spray or spray on the desired substrate.
  • a medium such as air
  • the mixed components are atomized at the outlet of the mixer by exposure to a medium such as air and can then be applied in the form of a spray or spray on the desired substrate.
  • a static mixer comprising a bent outlet member is disclosed in US Pat EP 2 230 025 A1 disclosed.
  • the EP 1 083 005 A2 shows an intermediate piece to Use with a static mixer.
  • a device for the above applications is for example in the US-B-6,951,310 disclosed.
  • a tubular mixer housing is provided, which receives the mixing element for the static mixture and which has an external thread at one end, onto which an annular nozzle body is screwed.
  • the nozzle body also has an external thread.
  • a cone-shaped Zerstäuberelement is placed, which has on its conical surface a plurality of longitudinal grooves.
  • a cap is inverted, the inner surface is also designed conical, so that it rests against the conical surface of the atomizer. Consequently, the grooves form flow channels between the atomizer element and the cap.
  • the cap is fixed together with the atomizer element by means of a union nut, which is screwed onto the external thread of the nozzle body, on the nozzle body.
  • the nozzle body has a connection for pressure. In operation, the compressed air flows from the nozzle body through the flow channels between the atomizer element and the cap and atomizes the material emerging from the mixing element.
  • the object of the present invention is to mix such spray mixers and to make spraying of at least two flowable components accessible for an even wider field of application, whereby the simplest possible handling should be ensured.
  • the static spray mixer has a tubular mixer housing with at least one mixing element and a Zerstäubungshülse, wherein the mixer housing extends in the direction of a longitudinal axis to a distal end having an outlet opening for the components, the atomizing sleeve having an inlet channel for a pressurized Sputtering medium and an inner surface having a plurality of separate grooves, which can form separate flow channels together with the mixer housing.
  • the combination is characterized in that the intermediate piece has an inlet area for cooperation with the distal end area of the mixer housing, and an outlet area for cooperation with the atomizing sleeve, the inlet area and the outlet area enclosing a non-zero deflection angle, and the outlet area being at its the end portion facing away from the inlet portion has an end portion whose outer contour is equal to that of the mixer housing, so that the end portion of the outlet portion can cooperate with the sputtering sleeve in the same way as the distal end portion of the mixer housing with the sputtering sleeve can cooperate.
  • the intermediate piece makes it possible in a simple manner to use a static spray mixer even in those applications in which the surface to be sprayed is more difficult to access. So can be sprayed or sprayed around corners with this adapter, for example. This opens up an even wider field of application of such static spray mixers. Since the End portion of the outlet portion of the intermediate piece of its outer contour is the same design as the distal end portion of the mixer housing, this end portion of the outlet portion as well together with the Zerstäubungshülse as the mixer housing, that is, the intermediate piece allows an equally good homogeneous atomization and a stable flow of the fluid at the outlet of the intermediate piece, where the mixed components emerge.
  • the deflection angle between the inlet region and the outlet region is in the range of 45 to 135 degrees, preferably in the range of 60 to 120 degrees.
  • the angle of deflection between the inlet region and the outlet region is 90 degrees, because this geometry has proved advantageous for many applications.
  • the inner contour of the inlet region of the intermediate piece is dimensioned so that it can lie flat against the distal end region of the mixer housing.
  • the inlet area is thread-free connectable to the mixer housing, for example by means of a snap connection.
  • the outlet region can be connected without threads to the atomizing sleeve, for example by means of a snap connection.
  • a further advantageous measure consists in that the outlet region has, at its end facing the inlet region, an end plate which is designed to engage in the atomizing sleeve, so that leakage of the atomizing medium from the end plate is prevented during operation. This end plate can then be used by engaging in the atomizing sleeve for connection of the intermediate piece with the atomizing sleeve.
  • the outlet region comprises a channel for the mixed component having a substantially constant inner diameter. This measure makes it possible to realize that the outlet at the end of the intermediate piece is an image of the outlet opening on the mixer housing, so that at the outlet the same flow conditions prevail for the thoroughly mixed components as at the outlet opening.
  • At least one guide element is provided between the end plate and the end section of the outlet region, the outer diameter of which is modeled on the outer contour of the distal end region of the mixer housing.
  • a plurality of disc-shaped guide elements arranged one behind the other are provided for this purpose, the outer diameter of which is modeled on the outer diameter of the mixer housing. That is, a disc-shaped guide member, which is a certain distance away from the outlet of the intermediate piece, has in Essentially the same outer diameter as the mixer housing at the location which is located at the same distance from the outlet opening of the mixer housing.
  • a helical guide element is provided, the outer diameter of which is modeled on the outer diameter of the mixer housing.
  • a static spray mixer for mixing and spraying of at least two flowable components with an intermediate piece
  • the static spray mixer having a tubular mixer housing with at least one mixing element and a Zerstäubungshülse, wherein the mixer housing in the direction of a longitudinal axis to a distal End having an outlet opening for the components, and wherein the sputtering sleeve having an inlet channel for a pressurized sputtering medium and an inner surface with a plurality of separate grooves which can form separate flow channels together with the mixer housing.
  • a preferred combination is that the sputtering sleeve is connectable to the intermediate piece such that the sputtering sleeve is rotatable about the intermediate piece.
  • Fig. 1 shows a longitudinal section of an embodiment of a static spray mixer, which is generally designated by the reference numeral 100.
  • the spray mixer 100 is for mixing and spraying of at least two flowable components.
  • Fig. 2 shows a perspective sectional view of the distal end portion of the static spray mixer 100.
  • the static spray mixer 100 is on the two already cited international patent applications no. PCT / EP2011 / 057378 and PCT / EP2011 / 057379 of Sulzer Mixpac AG.
  • the spray mixer 100 includes a tubular, one-piece mixer housing 2 that extends in the direction of a longitudinal axis A to a distal end 21.
  • the distal end 21 is meant that end at which the mixed components leave the mixer housing 2 in the operating state.
  • the distal end 21 is provided with an outlet opening 22.
  • the mixer housing 2 has a connecting piece 23, by means of which the mixer housing 2 can be connected to a reservoir for the components.
  • This reservoir can be, for example, a known two-component cartridge, designed as a coaxial or side-by-side cartridge, or two tanks in which the two components are kept separate from each other.
  • the connector is designed, e.g. as a snap connection, as a bayonet connection, as a threaded connection or combinations thereof.
  • At least one static mixing element 3 is arranged in a manner known per se, which rests against the inner wall of the mixer housing 2, so that the two components can only pass through the mixing element 3 from the proximal end to the outlet opening 22. It can either several, arranged one behind the other Mixing elements 3 may be provided, or as in the present embodiment, a one-piece mixing element 3, which is preferably injection-molded and consists of a thermoplastic.
  • a static mixers or mixing elements 3 per se are well known to the person skilled in the art and therefore require no further explanation.
  • Such mixing elements are for example in the already cited documents EP-A-0 749 776 and EP-A-0 815 929 described.
  • Such a mixing element 3 of the Qudro® type has a rectangular, in particular a square cross section, perpendicular to the longitudinal direction A. Accordingly, the one-piece mixer housing 2, at least in the region in which it encloses the mixing element 3, a substantially rectangular, in particular square cross-sectional area perpendicular to the longitudinal axis A.
  • the mixing element 3 does not extend all the way to the distal end 21 of the mixer housing 2, but ends at a stop 25 (see Fig. 2 ), which is realized here by the transition of the mixer housing 2 from a square to a round cross-section. Seen in the direction of flow, therefore, the interior of the mixer housing 2 up to this stop 25 has a substantially square cross-section for receiving the mixing element 3.
  • the interior of the mixer housing 2 is in a circular cone shape, which realizes a taper in the mixer housing 2.
  • the interior thus has a circular cross section and forms an exit region 26, which tapers in the direction of the distal end 21 and there opens into the outlet opening 22.
  • the static spray mixer 1 further comprises a Zerstäubungshülse 4, a Inner surface which encloses the mixer housing 2 in its end region.
  • the atomizing sleeve 4 is designed in one piece and is preferably injection-molded, in particular made of a thermoplastic. It has an inlet channel 41 for a pressurized atomizing medium, which is in particular gaseous. Preferably, the atomization medium is compressed air.
  • the inlet channel 41 can be designed for all known connections, in particular also for a Luer lock.
  • the atomizing sleeve 4 is preferably connected thread-free with the mixer housing, in the present embodiment by means of a snap connection.
  • a flange-like elevation 24 is provided on the mixer housing 2 (see Fig. 2 ), which extends over the entire circumference of the mixer housing 2.
  • a circumferential groove 43 is provided, which is designed to cooperate with the survey 24. If the atomizing sleeve 4 is pushed over the mixer housing 2, the projection 24 snaps into the circumferential groove 43 and ensures a stable connection of the atomizing sleeve 4 to the mixer housing 2.
  • this snap connection is designed to be sealing, so that the atomizing medium - in this case not the compressed air can escape through this from the circumferential groove 43 and the survey 24 existing connection.
  • the atomizing sleeve 4 lies with its inner surface in a region between the mouth of the inlet channel 41 and the elevation 24 closely on the outer surface of the mixer housing 2, so that also a sealing effect is achieved, which prevents leakage or a reverse flow of the atomizing medium.
  • a plurality of each extending to the distal end 21 grooves 5 are provided which form separate flow channels between the sputtering sleeve 4 and the mixer housing 2, through which the sputtering medium from the inlet channel 41 of the sputtering 4 to the distal end 21 of the mixer housing 2 to flow can.
  • the grooves 5 may be curved, for example, arcuate or rectilinear or may be configured by combinations of curved and rectilinear sections. With regard to the specific design possibilities for the grooves 5, reference is made to the already cited international patent applications no. PCT / EP2011 / 057378 and PCT / EP2011 / 057379 directed.
  • the inner surface of the atomizing sleeve 4 is configured to cooperate with the distal end portion 27 of the mixer housing 2.
  • the ribs of the atomizing sleeve 4 provided between the grooves 5 and the outer surface of the mixer housing 2 lie tightly and sealingly against one another so that the grooves 5 each form a separate flow channel between the inner surface of the atomizing sleeve 4 and the outer surface of the mixer housing 2.
  • annular space 6 is in fluid communication with the inlet channel 41 of the atomizer sleeve 4. Through the annulus 6, the sputtering medium from the inlet channel 41 in the get separate flow channels.
  • the grooves 5 are uniformly distributed over the inner surface of the atomizing sleeve 4. It has proved to be advantageous with regard to the most complete and homogeneous atomization of the mixed components emerging from the outlet opening when the compressed air flows generated by the grooves 5 have a twist, ie a rotation on a helix about the longitudinal axis A. This twist causes a clear stabilization of the compressed air flow.
  • the circulating atomizing medium in this case compressed air, generates a jet which is stabilized by the swirl and thus acts evenly on the mixed components emerging from the outlet opening 22. This results in a very uniform and in particular reproducible spray pattern. Particularly favorable in this case is a possible cone-shaped compressed air jet, which is stabilized by the spin. This extremely uniform and reproducible air flow results in significantly lower overspray during use.
  • the grooves 5, which form the flow channels, do not extend exactly in the axial direction defined by the longitudinal axis A or inclined not only on the longitudinal axis, but the extension of the grooves 5 also has a component in the circumferential direction of the Atomizing sleeve 4.
  • the course of the grooves 5 is at least approximately spirally or helically about the longitudinal axis A.
  • Another measure for generating the twist is to arrange the inlet channel 41, through which the atomizing medium enters the flow channels, asymmetrically with respect to the longitudinal axis A.
  • the inlet channel 41 is arranged so that its central axis does not intersect the longitudinal axis A, but has a vertical distance from the longitudinal axis A.
  • This asymmetric or even eccentric arrangement of the inlet channel 41 with respect to the longitudinal axis A has the consequence that the atomizing medium, in this case the compressed air, when entering the annular space 6 in a rotational or swirling motion about the longitudinal axis A is added.
  • the air used as a sputtering medium can be additionally applied with kinetic energy downstream of the narrowest point and thus accelerate. As with a Laval nozzle, this happens through the flow cross-section widening again in the direction of flow.
  • this embodiment operates as follows.
  • the static spray mixer is connected by means of its connecting piece 23 to a storage vessel containing the two components separated from each other, for example with a two-component cartridge.
  • the inlet channel 41 of the atomizing sleeve 4 is connected to a source of the atomizing medium, for example a compressed air source.
  • the two components are discharged, get into the static spray mixer 100 and are intimately mixed there by means of the mixing element 3.
  • the two components after flowing through the mixing element 3, pass through the outlet region 26 of the mixer housing 2 to the outlet opening 22.
  • the compressed air flows through the inlet channel 41 of the atomizing sleeve 4 into the annular space 6 between the inner surface of the atomizing sleeve 4 and the outer surface of the mixer housing 2 , Obtained by the asymmetric arrangement a twist and passes from there through the grooves 5, which form the flow channels, to the distal end 21 and thus to the outlet opening 22 of the mixer housing 3.
  • the stabilized by the swirl compressed air flow meets the through the outlet opening 22nd Exiting mixed material, atomizes it evenly and transports it as a spray to the substrate to be treated or coated. Since in some applications the discharge of the components from the storage vessel takes place with compressed air or compressed air, the compressed air can also be used for the atomization.
  • FIG. 3 shows a perspective view of an embodiment of an intermediate piece, which is generally designated by the reference numeral 1, together with the static spray mixer 100 in an exploded view.
  • the intermediate piece 1 is specially designed to be arranged like an adapter between the distal end region of the mixer housing 2 and the atomizing sleeve 4.
  • the intermediate piece 1 comprises an inlet region 11 for cooperation with the distal end region 27 of the mixer housing 2 and an outlet region 12 for cooperation with the atomizing sleeve 4.
  • the outlet region 12 comprises an outlet 14, through which the mixed components can emerge.
  • the inlet region 11 and the outlet region 12 include a non-zero deflection angle ⁇ .
  • ⁇ the axis in the direction of which the inlet region 11 extends (here the longitudinal axis A of the mixer housing) and the axis B, in the direction of which the outlet region 12 extends, enclose the deflection angle ⁇ .
  • the deflection angle ⁇ is also different from 180 °.
  • the outlet region 12 has, at its end facing away from the inlet region 11, an end section 13 whose outside contour is equal to that of the mixer housing 2, so that the end section 13 of the outlet region 12 can co-operate with the atomizing sleeve 4 in the same way as the distal end region 27 of the mixer housing 2.
  • all the positive fluid mechanical properties realized by the cooperation between the atomizing sleeve 4 and the distal end portion 27 remain the same quality when the end portion 13 of the outlet portion 12 of the intermediate piece 1 cooperates with the atomizing sleeve 4.
  • formed by the grooves 5 see Fig.
  • the separate flow channels through which passes the sputtering medium in the same way in the form of individual compressed air jets (or jets of Zerstäubungsmediums) to the outlet end.
  • the compressed air jets are first formed at their exit as discrete individual jets, which then unite due to their swirl attachment to a uniform stable overall jet, which atomizes the exiting from the outlet 14 mixed components.
  • This total jet preferably has a conical shape.
  • the end portion 13 of the outlet portion 12 is thus a replica of the distal end of the mixer housing 2.
  • the deflection angle ⁇ is in the range of 45 ° to 135 °, in particular in the range of 60 ° to 120 °. In the embodiment described here, the deflection angle ⁇ is equal to 90 °, which is advantageous for many applications. It is understood, however, that any other deflection angle ⁇ are possible.
  • Fig. 6 shows an embodiment in the assembled state.
  • the inner contour of the inlet region 11 of the intermediate piece 1 is dimensioned such that the inlet region 11 lies flat against the distal end region 27 of the mixer housing 2. This ensures that the mixed components emerging from the mixer housing 2 flow completely into the intermediate piece and no leaks between the mixer housing 2 and the intermediate piece 1 occur.
  • the inlet region 11 is preferably connected thread-free with the mixer housing 2, because this ensures a particularly simple handling.
  • the inlet region 11 is connected via a snap connection with the mixer housing, in a manner similar to that described with reference to FIG Fig. 2 for the connection of the atomizing sleeve 4 with the mixer housing 2 is described.
  • a circumferential groove provided (corresponding to the circumferential groove 43 in FIG Fig. 2 ), which is configured to cooperate with the flange-like elevation 24 on the mixer housing 2.
  • this snap connection is designed to be sealing, so that a sealing effect is achieved as well Leakage or a reverse flow of the mixed components prevented.
  • connection of the intermediate piece 1 with the mixer housing 2 via a circumferential groove and the protruding elevation 24 has the further advantage that the intermediate piece 1 with respect to the mixer frame 2 is rotatable about the longitudinal axis A, whereby the flexibility increases with respect to the applications.
  • the outlet region 12 of the intermediate piece 1 is preferably connected thread-free with the atomizing sleeve 4.
  • a preferred compound is a snap connection.
  • the outlet region 12 has, at its end facing the inlet region 11, a disk-shaped end plate 15, which is designed such that it seals in the circumferential groove 43 (FIG. Fig. 2 ) of the atomizing sleeve 4 can intervene, in a manner analogous to this based on Fig. 2 was declared for the survey 24 of the mixer housing 2.
  • connection between the outlet region 12 and the atomizing sleeve 4 via the end plate 15 and the circumferential groove 43 also has the advantage that the atomizing sleeve 4 is rotatable about the outlet region around the axis B direction, so that in operation the supply of compressed air or the supply of the Sputtering medium can be made from any lateral position.
  • the outlet portion 12 further includes a central channel 16 for the mixed components extending to the outlet 14 and having a substantially constant inner diameter.
  • the outlet 14 of the intermediate piece 1 is an image of the outlet opening 22 of the mixer housing 2. This measure ensures that the fluid mechanical conditions at the outlet 14 of the intermediate piece 1 are at least approximately the same as when the atomizing sleeve 4 placed directly on the mixer housing 2 becomes. Consequently, no compromise on the quality of the spray process is required by the spacer 1.
  • the atomizing medium for example compressed air
  • the atomizing medium flows from there into the outlet region 12 of the intermediate piece 1, where an undesirable backward leakage is prevented by the end plate 15 and passes along the outside of the channel 16 to End portion 13, there to flow into the formed by the grooves 5 in the sputtering sleeve and the end portion 13 separate flow channels through which the sputtering medium reaches the region of the outlet 14, where it mixed the there exiting mixed Atomized components.
  • a further constructive measure consists in providing at least one guide element 17 between the end plate 15 and the end section 13 of the outlet region 12, whose outer diameter is modeled on the outer contour of the distal end region 27 of the mixer housing.
  • the guide element 17, which is a certain distance away from the outlet 14 of the intermediate piece 1 with respect to the direction defined by the axis B, has substantially the same outer diameter as the mixer housing 2 at the point which is in the same position Distance from the outlet opening 22 of the mixer housing is located.
  • This measure can also contribute positively to the fact that the flow conditions for the pressurized atomizing medium at the end of the intermediate piece 1 are comparable or equal to those which would be without the intermediate piece 1 at the outlet opening 22 of the mixer housing 2.
  • This guide element 17 is designed disk-shaped and has substantially the same outer diameter as the mixer housing 2 at the point which is equidistant from the outlet opening 22 as the guide member 17 from the outlet 14 of the intermediate piece. 1
  • FIG. 4 and 5 In each case a perspective view of another embodiment of the intermediate piece 1 is shown, wherein the intermediate piece 1 is placed on the mixer housing 2.
  • the following are just the differences to the in Fig. 3 illustrated embodiment, otherwise apply in connection with the embodiment in Fig. 3 Explanations made in accordance with the same manner also for the embodiments according to Fig. 4 and Fig. 5 ,
  • Fig. 4 are provided at the intermediate piece 1 more with respect to the direction defined by the axis B direction one behind the other arranged disc-shaped guide elements 17, namely four.
  • the outer diameter of the guide elements 17 is modeled on the outer diameter of the mixer housing 2.
  • a guide element 17 is provided, which is configured as a helical guide element 17.
  • the guide element 17 extends helically around the channel 17, wherein the outer diameter of the guide element is modeled on the outer diameter of the mixer housing.
  • Fig. 6 shows in perspective a combination of a static spray mixer 100 with one of the embodiments of the intermediate piece in the assembled state for operation.
  • the intermediate piece 1 such that the deflection angle ⁇ is variable, either in discrete steps or continuously.
  • an articulated connection e.g. a hinge or ball joint may be provided between the inlet area and the outlet area.
  • the inventive combination is to form the intermediate piece 1 to the mixer housing 2, so that the intermediate piece is integral with the mixer housing.
  • the intermediate piece 1 then forms the end of the mixer housing 2, which is angled by the deflection angle ⁇ -for example by 90 ° - against the longitudinal axis A of the mixer housing.
  • ⁇ deflection angle

Description

Die Erfindung betrifft eine Kombination eines Zwischenstücks mit einem statischen Sprühmischer.The invention relates to a combination of an intermediate piece with a static spray mixer.

Statische Mischer zum Mischen von mindestens zwei fliessfähigen Komponenten sind beispielsweise in der EP-A-0 749 776 und in der EP-A-0 815 929 beschrieben. Diese sehr kompakten Mischer liefern trotz einem einfachen, materialsparenden Aufbau ihrer Mischerstruktur gute Mischresultate, insbesondere auch beim Mischen von hochviskosen Stoffen wie beispielsweise Dichtmassen, Zweikomponenten-Schäume, oder Zweikomponenten-Klebstoffe. Üblicherweise sind solche statischen Mischer für den Einmalgebrauch ausgelegt und werden häufig für aushärtende Produkte verwendet, bei denen die Mischer praktisch nicht mehr gereinigt werden können.Static mixers for mixing at least two flowable components are for example in the EP-A-0 749 776 and in the EP-A-0 815 929 described. Despite their simple, material-saving construction of their mixer structure, these very compact mixers produce good mixing results, especially when mixing highly viscous substances such as sealants, two-component foams, or two-component adhesives. Typically, such static mixers are designed for single use and are often used for curing products in which the mixer practically can not be cleaned.

Bei einigen Anwendungen, bei denen solche statischen Mischer eingesetzt werden, ist es wünschenswert, die beiden Komponenten nach ihrer Durchmischung in dem statischen Mischer auf ein Substrat aufzusprühen. Dazu werden die durchmischten Komponenten am Ausgang des Mischers durch Beaufschlagung mit einem Medium wie beispielsweise Luft zerstäubt und können dann in Form eines Sprühstrahls oder Sprühnebels auf das gewünschte Substrat aufgebracht werden. Mit dieser Technologie können insbesondere auch höher viskose Beschichtungsmedien, z. B. Polyurethane, Epoxidharze oder ähnliches verarbeitet werden.In some applications where such static mixers are used, it is desirable to spray the two components onto a substrate after they have been mixed in the static mixer. For this purpose, the mixed components are atomized at the outlet of the mixer by exposure to a medium such as air and can then be applied in the form of a spray or spray on the desired substrate. With this technology, especially higher-viscosity coating media, for. As polyurethanes, epoxy resins or the like can be processed.

Ein statischer Mischer, welcher ein gebogenes Auslasselement umfasst, ist in der EP 2 230 025 A1 offenbart. Die EP 1 083 005 A2 zeigt ein Zwischenstück zur Verwendung mit einem statischen Mischer.A static mixer comprising a bent outlet member is disclosed in US Pat EP 2 230 025 A1 disclosed. The EP 1 083 005 A2 shows an intermediate piece to Use with a static mixer.

Eine Vorrichtung für die oben genannten Anwendungen ist beispielsweise in der US-B-6,951,310 offenbart. Bei dieser Vorrichtung ist ein rohrförmiges Mischergehäuse vorgesehen, welches das Mischelement für die statische Mischung aufnimmt und welches an einem Ende ein Aussengewinde aufweist, auf das ein ringförmiger Düsenkörper aufgeschraubt wird. Der Düsenkörper weist ebenfalls ein Aussengewinde auf. Auf das Ende des Mischelements, das aus dem Mischergehäuse herausschaut, wird ein konusförmiges Zerstäuberelement aufgesetzt, das auf seiner Konusfläche mehrere in Längsrichtung verlaufende Nuten aufweist. Über dieses Zerstäuberelement wird eine Kappe gestülpt, deren Innenfläche ebenfalls konisch ausgestaltet ist, sodass sie an der Konusfläche des Zerstäuberelements anliegt. Folglich bilden die Nuten Strömungskanäle zwischen dem Zerstäuberelement und der Kappe. Die Kappe wird zusammen mit dem Zerstäuberelement mittels einer Überwurfmutter, die auf das Aussengewinde des Düsenkörpers aufgeschraubt wird, am Düsenkörper fixiert. Der Düsenkörper weist einen Anschluss für Drucklust auf. Im Betrieb strömt die Druckluft aus dem Düsenkörper durch die Strömungskanäle zwischen dem Zerstäuberelement und der Kappe hindurch und zerstäubt das aus dem Mischelement austretende Material.A device for the above applications is for example in the US-B-6,951,310 disclosed. In this device, a tubular mixer housing is provided, which receives the mixing element for the static mixture and which has an external thread at one end, onto which an annular nozzle body is screwed. The nozzle body also has an external thread. On the end of the mixing element, which looks out from the mixer housing, a cone-shaped Zerstäuberelement is placed, which has on its conical surface a plurality of longitudinal grooves. About this Zerstäuberelement a cap is inverted, the inner surface is also designed conical, so that it rests against the conical surface of the atomizer. Consequently, the grooves form flow channels between the atomizer element and the cap. The cap is fixed together with the atomizer element by means of a union nut, which is screwed onto the external thread of the nozzle body, on the nozzle body. The nozzle body has a connection for pressure. In operation, the compressed air flows from the nozzle body through the flow channels between the atomizer element and the cap and atomizes the material emerging from the mixing element.

Auch wenn sich diese Vorrichtung als durchaus funktionstüchtig erwiesen hat, so ist ihr Aufbau sehr komplex und die Montage ist aufwändig, sodass die Vorrichtung insbesondere im Hinblick auf den Einmalgebrauch nicht sehr wirtschaftlich ist.Although this device has proven to be quite functional, so its structure is very complex and the assembly is complex, so that the device is not very economical, especially in terms of single use.

Konstruktiv deutlich einfachere statische Sprühmischer werden in den internationalen Patentanmeldungen Nr. PCT/EP2011/057378 und PCT/EP2011/057379 der Sulzer Mixpac AG offenbart. Bei diesem Sprühmischer sind das Mischergehäuse und die Zerstäubungsdüse jeweils einstückig ausgestaltet, wobei die die Strömungskanäle bildenden Nuten in der Innenfläche der Zerstäubungshülse oder in der Aussenfläche des Mischergehäuses vorgesehen sind.Structurally much simpler static spray mixers are described in the international patent applications no. PCT / EP2011 / 057378 and PCT / EP2011 / 057379 Sulzer Mixpac AG. In this spray mixer, the mixer housing and the atomizing nozzle are each designed in one piece, wherein the grooves forming the flow channels are provided in the inner surface of the atomizing sleeve or in the outer surface of the mixer housing.

Aufgabe der vorliegenden Erfindung ist es, derartige Sprühmischer zum Mischen und Sprühen von mindestens zwei fliessfähigen Komponenten für ein noch grösseres Anwendungsfeld zugänglich zu machen, wobei eine möglichst einfache Handhabung gewährleistet werden soll.The object of the present invention is to mix such spray mixers and to make spraying of at least two flowable components accessible for an even wider field of application, whereby the simplest possible handling should be ensured.

Der diese Aufgabe lösenden Gegenstand der Erfindung ist durch die Merkmale des unabhängigen Patentanspruchs gekennzeichnet.The object of the invention solving this object is characterized by the features of the independent claim.

Erfindungsgemäss wird also eine Kombination von einem statischen Sprühmischer mit einem Zwischenstück vorgeschlagen, welche zum Mischen und Sprühen von mindestens zwei fliessfähigen Komponenten geeignet ist. Dabei weist der statische Sprühmischer ein rohrförmiges Mischergehäuse mit mindestens einem Mischelement sowie eine Zerstäubungshülse auf, wobei sich das Mischergehäuse in Richtung einer Längsachse bis zu einem distalen Ende erstreckt, welches eine Austrittsöffnung für die Komponenten hat, wobei die Zerstäubungshülse einen Einlasskanal für ein unter Druck stehendes Zerstäubungsmedium sowie eine Innenfläche mit mehreren separaten Nuten aufweist, welche gemeinsam mit dem Mischergehäuse separate Strömungskanäle bilden können. Die Kombination zeichnet sich dadurch aus, dass das Zwischenstück einen Einlassbereich zum Zusammenwirken mit dem distalen Endbereich des Mischergehäuses, sowie einen Auslassbereich zum Zusammenwirken mit der Zerstäubungshülse aufweist, wobei der Einlassbereich und der Auslassbereich einen von null verschiedenen Umlenkwinkel einschliessen, und wobei der Auslassbereich an seinem dem Einlassbereich abgewandten Ende einen Endabschnitt aufweist, dessen Aussenkontur gleich derjenigen des Mischergehäuses ist, sodass der Endabschnitt des Auslassbereichs in gleicher Weise mit der Zerstäubungshülse zusammenwirken kann wie der distale Endbereich des Mischergehäuses mit der Zerstäubungshülse zusammenwirken kann.According to the invention, therefore, a combination of a static spray mixer with an intermediate piece is proposed, which is suitable for mixing and spraying of at least two flowable components. In this case, the static spray mixer has a tubular mixer housing with at least one mixing element and a Zerstäubungshülse, wherein the mixer housing extends in the direction of a longitudinal axis to a distal end having an outlet opening for the components, the atomizing sleeve having an inlet channel for a pressurized Sputtering medium and an inner surface having a plurality of separate grooves, which can form separate flow channels together with the mixer housing. The combination is characterized in that the intermediate piece has an inlet area for cooperation with the distal end area of the mixer housing, and an outlet area for cooperation with the atomizing sleeve, the inlet area and the outlet area enclosing a non-zero deflection angle, and the outlet area being at its the end portion facing away from the inlet portion has an end portion whose outer contour is equal to that of the mixer housing, so that the end portion of the outlet portion can cooperate with the sputtering sleeve in the same way as the distal end portion of the mixer housing with the sputtering sleeve can cooperate.

Das Zwischenstück ermöglicht es in einfacher Weise, einen statischen Sprühmischer auch in solchen Anwendungsfällen einzusetzen, bei denen die zu besprühende Fläche schwerer zugänglich ist. So kann mit diesem Zwischenstück beispielsweise um Ecken herum gespritzt bzw. gesprüht werden. Dies eröffnet ein noch grösseres Einsatzgebiet solcher statischer Sprühmischer. Da der Endabschnitt des Auslassbereichs des Zwischenstücks von seiner Aussenkontur gleich gestaltet ist wie der distale Endbereich des Mischergehäuses, kann dieser Endabschnitt des Auslassbereichs gleich gut mit der Zerstäubungshülse zusammenwirken wie das Mischergehäuse, das heisst, das Zwischenstück ermöglicht eine gleich gute homogene Zerstäubung und eine stabile Strömung des Fluids am Austritt des Zwischenstücks, wo die durchmischten Komponenten austreten.The intermediate piece makes it possible in a simple manner to use a static spray mixer even in those applications in which the surface to be sprayed is more difficult to access. So can be sprayed or sprayed around corners with this adapter, for example. This opens up an even wider field of application of such static spray mixers. Since the End portion of the outlet portion of the intermediate piece of its outer contour is the same design as the distal end portion of the mixer housing, this end portion of the outlet portion as well together with the Zerstäubungshülse as the mixer housing, that is, the intermediate piece allows an equally good homogeneous atomization and a stable flow of the fluid at the outlet of the intermediate piece, where the mixed components emerge.

Aufgrund der praktischen Erfahrung ist es bevorzugt, wenn der Umlenkwinkel zwischen dem Einlassbereich und dem Auslassbereich im Bereich von 45 bis 135 Grad liegt, vorzugsweise im Bereich von 60 bis 120 Grad.Because of practical experience, it is preferred that the deflection angle between the inlet region and the outlet region is in the range of 45 to 135 degrees, preferably in the range of 60 to 120 degrees.

Bei einem bevorzugten Ausführungsbeispiel beträgt der Umlenkwinkel zwischen dem Einlassbereich und dem Auslassbereich 90 Grad, denn diese Geometrie hat sich für viele Anwendungsfälle als vorteilhaft erwiesen.In a preferred embodiment, the angle of deflection between the inlet region and the outlet region is 90 degrees, because this geometry has proved advantageous for many applications.

Vorzugsweise ist die Innenkontur des Einlassbereichs des Zwischenstücks so bemessen ist, dass dieser flächig an dem distalen Endbereich des Mischergehäuses anliegen kann. Durch diese Massnahme wird eine sichere Führung des Zwischenstücks gewährleistet und Leckagen zwischen der Austrittsöffnung des Mischergehäuses und dem Zwischenstück können vermieden werden.Preferably, the inner contour of the inlet region of the intermediate piece is dimensioned so that it can lie flat against the distal end region of the mixer housing. By this measure, a secure guidance of the intermediate piece is ensured and leaks between the outlet opening of the mixer housing and the intermediate piece can be avoided.

Da es konstruktiv und von der Handhabung besonders einfach ist, ist es bevorzugt, wenn der Einlassbereich gewindefrei mit dem Mischergehäuse verbindbar ist, beispielsweise mittels einer Schnappverbindung.Since it is constructive and easy to handle, it is preferred if the inlet area is thread-free connectable to the mixer housing, for example by means of a snap connection.

Aus gleichem Grunde ist es bevorzugt, wenn der Auslassbereich gewindefrei mit der Zerstäubungshülse verbindbar ist, beispielsweise mittels einer Schnappverbindung.For the same reason, it is preferred if the outlet region can be connected without threads to the atomizing sleeve, for example by means of a snap connection.

Eine weitere vorteilhafte Massnahme besteht darin, dass der Auslassbereich an seinem dem Einlassbereich zugewandten Ende eine Abschlussplatte aufweist, welche zum Eingreifen in die Zerstäubungshülse ausgestaltet ist, sodass während des Betriebs ein Austreten des Zerstäubungsmediums von der Abschlussplatte verhindert wird. Diese Abschlussplatte kann dann durch den Eingriff in die Zerstäubungshülse zur Verbindung des Zwischenstücks mit der Zerstäubungshülse genutzt werden.A further advantageous measure consists in that the outlet region has, at its end facing the inlet region, an end plate which is designed to engage in the atomizing sleeve, so that leakage of the atomizing medium from the end plate is prevented during operation. This end plate can then be used by engaging in the atomizing sleeve for connection of the intermediate piece with the atomizing sleeve.

Vorzugsweise umfasst der Auslassbereich einen Kanal für die durchmischten Komponenten, der einen im Wesentlichen konstanten Innendurchmesser aufweist. Durch diese Massnahme lässt es sich nämlich realisieren, dass der Austritt am Ende des Zwischenstücks ein Abbild der Austrittsöffnung am Mischergehäuse ist, sodass am Austritt die gleichen Strömungsverhältnisse für die durchmischten Komponenten herrschen wie an der Austrittsöffnung.Preferably, the outlet region comprises a channel for the mixed component having a substantially constant inner diameter. This measure makes it possible to realize that the outlet at the end of the intermediate piece is an image of the outlet opening on the mixer housing, so that at the outlet the same flow conditions prevail for the thoroughly mixed components as at the outlet opening.

Ferner hat es sich als vorteilhaft erwiesen, wenn zwischen der Abschlussplatte und dem Endabschnitt des Auslassbereichs mindestens ein Führungselement vorgesehen ist, dessen Aussendurchmesser der Aussenkontur des distalen Endbereichs des Mischergehäuses nachgebildet ist. Hierdurch kann realisiert werden, dass die Strömungsverhältnisse für das unter Druck eingebrachte Zerstäubungsmedium am Ende des Zwischenstücks vergleichbar oder gleich denjenigen sind, wie sie ohne das Zwischenstück an der Austrittsöffnung des Mischergehäuses wären.Furthermore, it has proved to be advantageous if at least one guide element is provided between the end plate and the end section of the outlet region, the outer diameter of which is modeled on the outer contour of the distal end region of the mixer housing. In this way, it can be realized that the flow conditions for the pressurized atomizing medium at the end of the intermediate piece are comparable or equal to those which would be without the intermediate piece at the outlet opening of the mixer housing.

Bei einem Ausführungsbeispiel sind dazu mehrere hintereinander angeordnete jeweils scheibenförmige Führungselemente vorgesehen, deren Aussendurchmesser dem Aussendurchmesser des Mischergehäuses nachgebildet ist. Das heisst, ein scheibenförmiges Führungselement, das eine bestimmte Entfernung vom Auslass des Zwischenstücks entfernt ist, hat im Wesentlichen den gleichen Aussendurchmesser wie das Mischergehäuse an derjenigen Stelle, die sich in gleicher Entfernung von der Austrittsöffnung des Mischergehäuses befindet.In one embodiment, a plurality of disc-shaped guide elements arranged one behind the other are provided for this purpose, the outer diameter of which is modeled on the outer diameter of the mixer housing. That is, a disc-shaped guide member, which is a certain distance away from the outlet of the intermediate piece, has in Essentially the same outer diameter as the mixer housing at the location which is located at the same distance from the outlet opening of the mixer housing.

Gemäss einem anderen Ausführungsbeispiel ist ein schraubenlinienförmiges Führungselement vorgesehen, dessen Aussendurchmesser dem Aussendurchmesser des Mischergehäuses nachgebildet ist.According to another embodiment, a helical guide element is provided, the outer diameter of which is modeled on the outer diameter of the mixer housing.

Es wird ferner die Kombination eines statischen Sprühmischers zum Mischen und Sprühen von mindestens zwei fliessfähigen Komponenten mit einem Zwischenstück vorgeschlagen, wobei der statische Sprühmischer ein rohrförmiges Mischergehäuse mit mindestens einem Mischelement sowie eine Zerstäubungshülse aufweist, wobei sich das Mischergehäuse in Richtung einer Längsachse bis zu einem distalen Ende erstreckt, welches eine Austrittsöffnung für die Komponenten hat, und wobei die Zerstäubungshülse einen Einlasskanal für ein unter Druck stehendes Zerstäubungsmedium aufweist sowie eine Innenfläche mit mehreren separaten Nuten, welche gemeinsam mit dem Mischergehäuse separate Strömungskanäle bilden können.It is also proposed the combination of a static spray mixer for mixing and spraying of at least two flowable components with an intermediate piece, the static spray mixer having a tubular mixer housing with at least one mixing element and a Zerstäubungshülse, wherein the mixer housing in the direction of a longitudinal axis to a distal End having an outlet opening for the components, and wherein the sputtering sleeve having an inlet channel for a pressurized sputtering medium and an inner surface with a plurality of separate grooves which can form separate flow channels together with the mixer housing.

Eine bevorzugte Kombination besteht darin, dass die Zerstäubungshülse derart mit dem Zwischenstück verbindbar ist, dass die Zerstäubungshülse um das Zwischenstück drehbar ist. Durch diese Massnahme ist die Zufuhr des Zerstäubungsmediums wesentlich flexibler gestaltbar.A preferred combination is that the sputtering sleeve is connectable to the intermediate piece such that the sputtering sleeve is rotatable about the intermediate piece. By this measure, the supply of atomizing medium is much more flexible designable.

Es ist auch möglich, die Kombination so zu gestalten, dass das Zwischenstück an das Mischergehäuse angeformt ist, sodass das Zwischenstück einstückig mit dem Mischergehäuse ist.It is also possible to design the combination so that the intermediate piece is molded onto the mixer housing so that the intermediate piece is integral with the mixer housing.

Weiter vorteilhafte Massnahmen und Ausgestaltungen der Erfindung ergeben sich aus den abhängigen Ansprüchen.Further advantageous measures and embodiments of the invention will become apparent from the dependent claims.

Im Folgenden wird die Erfindung anhand von Ausführungsbeispielen und anhand der Zeichnung näher erläutert. In der schematischen Zeichnung zeigen teilweise im Schnitt:

  • Fig. 1: einen Längsschnitt eines Ausführungsbeispiels eines statischen Sprühmischers,
  • Fig. 2: eine perspektivische Schnittdarstellung des distalen Endbereichs des statischen Sprühmischers aus Fig. 1,
  • Fig. 3: eine perspektivische Darstellung eines Ausführungsbeispiels eines Zwischenstücks, zusammen mit einem statischen Sprühmischer in einer Explosionsdarstellung,
  • Fig. 4: eine perspektivische Darstellung eines anderen Ausführungsbeispiels eines Zwischenstücks aufgesetzt auf das Mischergehäuse eines statischen Sprühmischers,
  • Fig. 5: eine perspektivische Darstellung eines weiteren Ausführungsbeispiels eines Zwischenstücks aufgesetzt auf das Mischergehäuse eines statischen Sprühmischers, und
  • Fig. 6: eine perspektivische Darstellung einer Kombination eines statischen Sprühmischers mit einem Zwischenstück im zusammengesetzten Zustand.
In the following the invention will be explained in more detail by means of embodiments and with reference to the drawing. In the schematic drawing show partly in section:
  • Fig. 1 FIG. 3 is a longitudinal section of an embodiment of a static spray mixer. FIG.
  • Fig. 2 FIG. 3 is a perspective sectional view of the distal end portion of the static spray mixer. FIG Fig. 1 .
  • Fig. 3 FIG. 2: a perspective view of an embodiment of an intermediate piece, together with a static spray mixer in an exploded view, FIG.
  • Fig. 4 FIG. 3 is a perspective view of another embodiment of an intermediate piece placed on the mixer housing of a static spray mixer. FIG.
  • Fig. 5 a perspective view of another embodiment of an intermediate piece mounted on the mixer housing of a static spray mixer, and
  • Fig. 6 : A perspective view of a combination of a static spray mixer with an intermediate piece in the assembled state.

Zum besseren Verständnis der Erfindung wird zunächst anhand der Fig. 1 und der Fig. 2 ein statischer Sprühmischer erläutert, wie er beispielsweise in der europäischen Patentanmeldung Nr. 10170141.5 der Sulzer Mixpac AG offenbart ist. Fig. 1 zeigt einen Längsschnitt eines Ausführungsbeispiels eines statischen Sprühmischers, der gesamthaft mit dem Bezugszeichen 100 bezeichnet ist. Der Sprühmischer 100 dient zum Mischen und Sprühen von mindestens zwei fliessfähigen Komponenten. Fig. 2 zeigt eine perspektivische Schnittdarstellung des distalen Endbereichs des statischen Sprühmischers 100. Bezüglich einer detaillierteren Erläuterung des statischen Sprühmischers 100 wird auf die beiden bereits zitierten internationalen Patentanmeldungen Nr. PCT/EP2011/057378 und PCT/EP2011/057379 der Sulzer Mixpac AG verwiesen.For a better understanding of the invention is first based on the Fig. 1 and the Fig. 2 a static spray mixer, as described, for example, in European patent application no. 10170141.5 Sulzer Mixpac AG. Fig. 1 shows a longitudinal section of an embodiment of a static spray mixer, which is generally designated by the reference numeral 100. The spray mixer 100 is for mixing and spraying of at least two flowable components. Fig. 2 shows a perspective sectional view of the distal end portion of the static spray mixer 100. For a more detailed explanation of the static spray mixer 100 is on the two already cited international patent applications no. PCT / EP2011 / 057378 and PCT / EP2011 / 057379 of Sulzer Mixpac AG.

Im Folgenden wird auf den für die Praxis besonders relevanten Fall Bezug genommen, dass genau zwei Komponenten gemischt und gesprüht werden. Es versteht sich aber, dass die Erfindung auch für die Durchmischung und das Sprühen von mehr als zwei Komponenten verwendet werden kann.In the following, reference will be made to the case, which is particularly relevant for practice, in that exactly two components are mixed and sprayed. It is understood, however, that the invention can also be used for mixing and spraying more than two components.

Der Sprühmischer 100 umfasst ein rohrförmiges, einstückiges Mischergehäuse 2, das sich in Richtung einer Längsachse A bis zu einem distalen Ende 21 erstreckt. Mit dem distalen Ende 21 ist dabei dasjenige Ende gemeint, an welchem im Betriebszustand die durchmischten Komponenten das Mischergehäuse 2 verlassen. Dazu ist das distale Ende 21 mit einer Austrittsöffnung 22 versehen. An dem proximalen Ende, womit das Ende gemeint ist, an welchem die zu mischenden Komponenten in das Mischergehäuse 2 eingebracht werden, weist das Mischergehäuse 2 ein Verbindungsstück 23 auf, mittels welchem das Mischergehäuse 2 mit einem Vorratsbehälter für die Komponenten verbunden werden kann. Dieser Vorratsbehälter kann beispielsweise eine an sich bekannte Zwei-Komponenten-Kartusche sein, als Koaxial- oder Side-by-Side-Kartusche ausgestaltet, oder zwei Tanks, in denen die beiden Komponenten von einander getrennt aufbewahrt werden. Je nach Ausgestaltung des Vorratsbehälters, bzw. seines Ausgangs ist das Verbindungsstück ausgestaltet, z.B. als Schnappverbindung, als Bajonettverbindung, als Gewindeverbindung oder Kombinationen davon.The spray mixer 100 includes a tubular, one-piece mixer housing 2 that extends in the direction of a longitudinal axis A to a distal end 21. By the distal end 21 is meant that end at which the mixed components leave the mixer housing 2 in the operating state. For this purpose, the distal end 21 is provided with an outlet opening 22. At the proximal end, meaning the end at which the components to be mixed are introduced into the mixer housing 2, the mixer housing 2 has a connecting piece 23, by means of which the mixer housing 2 can be connected to a reservoir for the components. This reservoir can be, for example, a known two-component cartridge, designed as a coaxial or side-by-side cartridge, or two tanks in which the two components are kept separate from each other. Depending on the configuration of the reservoir, or its output, the connector is designed, e.g. as a snap connection, as a bayonet connection, as a threaded connection or combinations thereof.

In dem Mischergehäuse 2 ist in an sich bekannter Weise mindestens ein statisches Mischelement 3 angeordnet, das an der inneren Wand des Mischergehäuses 2 anliegt, sodass die beiden Komponenten nur durch das Mischelement 3 hindurch vom proximalen Ende zur Austrittsöffnung 22 gelangen können. Es können entweder mehrere, hintereinander angeordnete Mischelemente 3 vorgesehen sein, oder wie im vorliegenden Ausführungsbeispiel ein einstückiges Mischelement 3, das vorzugsweise spritzgegossen ist und aus einem Thermoplast besteht. Solche statischen Mischer bzw. Mischelemente 3 an sich sind dem Fachmann hinlänglich bekannt und bedürfen daher keiner weiteren Erläuterung.In the mixer housing 2, at least one static mixing element 3 is arranged in a manner known per se, which rests against the inner wall of the mixer housing 2, so that the two components can only pass through the mixing element 3 from the proximal end to the outlet opening 22. It can either several, arranged one behind the other Mixing elements 3 may be provided, or as in the present embodiment, a one-piece mixing element 3, which is preferably injection-molded and consists of a thermoplastic. Such static mixers or mixing elements 3 per se are well known to the person skilled in the art and therefore require no further explanation.

Insbesondere geeignet sind solche Mischer bzw. Mischelemente 3 wie sie unter der Markenbezeichnung QUADRO® von der Firma Sulzer Chemtech AG (Schweiz) vertrieben werden. Derartige Mischelemente sind beispielsweise in den bereits zitierten Dokumenten EP-A-0 749 776 und EP-A-0 815 929 beschrieben. Ein solches Mischelement 3 vom Qudro®-Typ hat senkrecht zur Längsrichtung A einen rechteckigen, insbesondere einen quadratischen Querschnitt. Dementsprechend hat auch das einstückige Mischergehäuse 2 zumindest in dem Bereich, in dem es das Mischelement 3 umschliesst, eine im wesentlichen rechteckige, insbesondere quadratische Querschnittsfläche senkrecht zur Längsachse A.Particularly suitable are those mixers or mixing elements 3 such as those sold under the brand name QUADRO® by the company Sulzer Chemtech AG (Switzerland). Such mixing elements are for example in the already cited documents EP-A-0 749 776 and EP-A-0 815 929 described. Such a mixing element 3 of the Qudro® type has a rectangular, in particular a square cross section, perpendicular to the longitudinal direction A. Accordingly, the one-piece mixer housing 2, at least in the region in which it encloses the mixing element 3, a substantially rectangular, in particular square cross-sectional area perpendicular to the longitudinal axis A.

Das Mischelement 3 erstreckt sich nicht ganz bis an das distale Ende 21 des Mischergehäuses 2, sondern endet an einem Anschlag 25 (siehe Fig. 2), der hier durch den Übergang des Mischergehäuses 2 von einem quadratischen auf einen runden Querschnitt realisiert ist. In Strömungsrichtung gesehen hat also der Innenraum des Mischergehäuses 2 bis zu diesem Anschlag 25 einen im wesentlichen quadratischen Querschnitt zur Aufnahme des Mischelements 3. An diesem Anschlag 25 geht der Innenraum des Mischergehäuses 2 in eine Kreiskegelform über, die eine Verjüngung im Mischergehäuse 2 realisiert. Hier weist der Innenraum also einen kreisförmigen Querschnitt auf und bildet einen Ausgangsbereich 26, der sich in Richtung des distalen Endes 21 verjüngt und dort in die Austrittsöffnung 22 mündet.The mixing element 3 does not extend all the way to the distal end 21 of the mixer housing 2, but ends at a stop 25 (see Fig. 2 ), which is realized here by the transition of the mixer housing 2 from a square to a round cross-section. Seen in the direction of flow, therefore, the interior of the mixer housing 2 up to this stop 25 has a substantially square cross-section for receiving the mixing element 3. At this stop 25, the interior of the mixer housing 2 is in a circular cone shape, which realizes a taper in the mixer housing 2. Here, the interior thus has a circular cross section and forms an exit region 26, which tapers in the direction of the distal end 21 and there opens into the outlet opening 22.

Der statische Sprühmischer 1 weist ferner eine Zerstäubungshülse 4 auf, die eine Innenfläche hat, welche das Mischergehäuse 2 in seinem Endbereich umschliesst. Die Zerstäubungshülse 4 ist einstückig ausgestaltet und vorzugsweise spritzgegossen, insbesondere aus einem Thermoplast. Sie weist einen Einlasskanal 41 für ein unter Druck stehendes Zerstäubungsmedium auf, das insbesondere gasförmig ist. Vorzugsweise ist das Zerstäubungsmedium Druckluft. Der Einlasskanal 41 kann für alle bekannten Anschlüsse ausgestaltet sein, insbesondere auch für einen Luer-Lock.The static spray mixer 1 further comprises a Zerstäubungshülse 4, a Inner surface which encloses the mixer housing 2 in its end region. The atomizing sleeve 4 is designed in one piece and is preferably injection-molded, in particular made of a thermoplastic. It has an inlet channel 41 for a pressurized atomizing medium, which is in particular gaseous. Preferably, the atomization medium is compressed air. The inlet channel 41 can be designed for all known connections, in particular also for a Luer lock.

Um eine besonders einfache Montage bzw. Herstellung zu ermöglichen, ist die Zerstäubungshülse 4 vorzugsweise gewindefrei mit dem Mischergehäuse verbunden, beim vorliegenden Ausführungsbeispiel mittels einer Schnappverbindung. Dazu ist am Mischergehäuse 2 eine flanschartige Erhebung 24 vorgesehen (siehe Fig. 2), welche sich über den gesamten Umfang des Mischergehäuses 2 erstreckt. An der Innenfläche der Zerstäubungshülse 4 ist eine Umfangsnut 43 vorgesehen, welche zum Zusammenwirken mit der Erhebung 24 ausgestaltet ist. Wird die Zerstäubungshülse 4 über das Mischergehäuse 2 geschoben, so schnappt die Erhebung 24 in die Umfangsnut 43 ein und sorgt für eine stabile Verbindung der Zerstäubungshülse 4 mit dem Mischergehäuse 2. Vorzugsweise ist diese Schnappverbindung dichtend ausgestaltet, sodass das Zerstäubungsmedium- hier die Druckluft- nicht durch diese aus der Umfangsnut 43 und der Erhebung 24 bestehende Verbindung entweichen kann. Ferner liegt die Zerstäubungshülse 4 mit ihrer Innenfläche in einem Bereich zwischen der Einmündung des Einlasskanals 41 und der Erhebung 24 eng auf der Aussenfläche des Mischergehäuses 2 auf, sodass auch hierdurch eine Dichtwirkung erzielt wird, die eine Leckage bzw. ein Rückwärtsströmen des Zerstäubungsmediums verhindert.In order to enable a particularly simple assembly or production, the atomizing sleeve 4 is preferably connected thread-free with the mixer housing, in the present embodiment by means of a snap connection. For this purpose, a flange-like elevation 24 is provided on the mixer housing 2 (see Fig. 2 ), which extends over the entire circumference of the mixer housing 2. On the inner surface of the atomizing sleeve 4, a circumferential groove 43 is provided, which is designed to cooperate with the survey 24. If the atomizing sleeve 4 is pushed over the mixer housing 2, the projection 24 snaps into the circumferential groove 43 and ensures a stable connection of the atomizing sleeve 4 to the mixer housing 2. Preferably, this snap connection is designed to be sealing, so that the atomizing medium - in this case not the compressed air can escape through this from the circumferential groove 43 and the survey 24 existing connection. Furthermore, the atomizing sleeve 4 lies with its inner surface in a region between the mouth of the inlet channel 41 and the elevation 24 closely on the outer surface of the mixer housing 2, so that also a sealing effect is achieved, which prevents leakage or a reverse flow of the atomizing medium.

Natürlich ist auch möglich, zusätzliche Dichtmittel, beispielsweise einen O-Ring zwischen dem Mischergehäuse 2 und der Zerstäubungshülse 4 anzuordnen. Alternativ zu der dargestellten Ausführung ist es auch möglich, eine Umfangsnut am Mischergehäuse 2 vorzusehen und an der Zerstäubungshülse 4 eine Erhebung, welche in diese Umfangsnut eingreift.Of course, it is also possible to arrange additional sealing means, for example an O-ring, between the mixer housing 2 and the atomizing sleeve 4. Alternatively to the illustrated embodiment, it is also possible to provide a circumferential groove on the mixer housing 2 and on the atomizing sleeve 4 a survey, which engages in this circumferential groove.

In der Innenfläche der Zerstäubungshülse 4 sind mehrere sich jeweils zum distalen Ende 21 erstreckende Nuten 5 vorgesehen, die zwischen der Zerstäubungshülse 4 und dem Mischergehäuse 2 separate Strömungskanäle bilden, durch welche das Zerstäubungsmedium vom Einlasskanal 41 der Zerstäubungshülse 4 zum distalen Ende 21 des Mischergehäuses 2 strömen kann.In the inner surface of the sputtering sleeve 4, a plurality of each extending to the distal end 21 grooves 5 are provided which form separate flow channels between the sputtering sleeve 4 and the mixer housing 2, through which the sputtering medium from the inlet channel 41 of the sputtering 4 to the distal end 21 of the mixer housing 2 to flow can.

Die Nuten 5 können gekrümmt, beispielsweis bogenförmig oder auch geradlinig oder auch durch Kombinationen von gekrümmten und geradlinigen Abschnitten ausgestaltet sein. Bezüglich der konkreten Ausgestaltungsmöglichkeiten für die Nuten 5 wird auf die bereits zitierten internationalen Patentanmeldungen Nr. PCT/EP2011/057378 und PCT/EP2011/057379 verwiesen.The grooves 5 may be curved, for example, arcuate or rectilinear or may be configured by combinations of curved and rectilinear sections. With regard to the specific design possibilities for the grooves 5, reference is made to the already cited international patent applications no. PCT / EP2011 / 057378 and PCT / EP2011 / 057379 directed.

Die Innenfläche der Zerstäubungshülse 4 ist zum Zusammenwirken mit dem distalen Endbereich 27 des Mischergehäuses 2 ausgestaltet. Die zwischen den Nuten 5 vorgesehenen Rippen der Zerstäubungshülse 4 und die Aussenfläche des Mischergehäuses 2 liegen eng und dichtend aneinander an so dass die Nuten 5 jeweils einen separaten Strömungskanal zwischen der Innenfläche der Zerstäubungshülse 4 und der Aussenfläche des Mischergehäuses 2 bilden.The inner surface of the atomizing sleeve 4 is configured to cooperate with the distal end portion 27 of the mixer housing 2. The ribs of the atomizing sleeve 4 provided between the grooves 5 and the outer surface of the mixer housing 2 lie tightly and sealingly against one another so that the grooves 5 each form a separate flow channel between the inner surface of the atomizing sleeve 4 and the outer surface of the mixer housing 2.

Weiter stromaufwärts, im Bereich der Einmündung des Einlasskanals 41 (siehe auch Fig. 2) ist die Höhe der Rippen zwischen den Nuten 5 so gering, dass zwischen der Aussenfläche des Mischergehäuses 2 und der Innenfläche der Zerstäuberhülse 4 ein Ringraum 6 existiert. Der Ringraum 6 steht mit dem Einlasskanal 41 der Zerstäuberhülse 4 in Strömungsverbindung. Durch den Ringraum 6 kann das Zerstäubungsmedium aus dem Einlasskanal 41 in die separaten Strömungskanäle gelangen.Further upstream, in the region of the mouth of the inlet channel 41 (see also Fig. 2 ), the height of the ribs between the grooves 5 is so small that between the outer surface of the mixer housing 2 and the inner surface of the atomizer 4, an annular space 6 exists. The annular space 6 is in fluid communication with the inlet channel 41 of the atomizer sleeve 4. Through the annulus 6, the sputtering medium from the inlet channel 41 in the get separate flow channels.

Die Nuten 5 sind gleichmässig über die Innenfläche der Zerstäubungshülse 4 verteilt. Es hat sich als vorteilhaft im Hinblick auf eine möglichst vollständige und homogene Zerstäubung der aus der Austrittsöffnung austretenden durchmischten Komponenten erwiesen, wenn die von den Nuten 5 erzeugten Druckluftströmungen einen Drall aufweisen, also eine Rotation auf einer Schraubenlinie um die Längsachse A. Dieser Drall bewirkt eine deutliche Stabilisierung des Druckluftstroms. Das zirkulierdende Zerstäubungsmedium, hier Druckluft, erzeugt einen Strahl , der durch den Drall stabilisiert wird und somit gleichmässig auf die aus der Austrittsöffnung 22 austretenden durchmischten Komponenten einwirkt. Hieraus resultiert ein sehr gleichförmiges und insbesondere reproduzierbares Sprühbild. Besonders günstig ist hierbei ein möglichst kegelförmiger Druckuftstrahl, der durch den Drall stabilisiert wird. Durch diesen äusserst gleichförmigen und reproduzierbaren Luftstrom resultiert ein signifikant geringere Sprühverlust (Overspray) bei der Anwendung.The grooves 5 are uniformly distributed over the inner surface of the atomizing sleeve 4. It has proved to be advantageous with regard to the most complete and homogeneous atomization of the mixed components emerging from the outlet opening when the compressed air flows generated by the grooves 5 have a twist, ie a rotation on a helix about the longitudinal axis A. This twist causes a clear stabilization of the compressed air flow. The circulating atomizing medium, in this case compressed air, generates a jet which is stabilized by the swirl and thus acts evenly on the mixed components emerging from the outlet opening 22. This results in a very uniform and in particular reproducible spray pattern. Particularly favorable in this case is a possible cone-shaped compressed air jet, which is stabilized by the spin. This extremely uniform and reproducible air flow results in significantly lower overspray during use.

Die am distalen Ende 21 aus den jeweils separaten Strömungskanälen austretenden einzelnen Druckluftstrahlen (bzw. Strahlen des Zerstäubungsmediums) sind zunächst bei ihrem Austritt als diskrete Einzelstrahlen ausgebildet, die sich dann aufgrund ihrer Drallbehaftung zu einem gleichmässigen stabilen Gesamtstrahl vereinigen, welcher die aus dem Mischergehäuse austretenden durchmischten Komponenten zerstäubt. Dieser Gesamtstrahl hat vorzugsweise einen kegelförmigen Verlauf.The emerging at the distal end 21 of the respective separate flow channels individual compressed air jets (or jets of Zerstäubungsmediums) are initially formed at their exit as discrete individual jets, which then unite due to their swirl attachment to a uniform stable overall jet, which mixed the exiting from the mixer housing mixed Atomized components. This total jet preferably has a conical shape.

Um den Drall in der Strömung des Zerstäubungsmediums zu generieren, sind mehrere Massnahmen möglich. Die Nuten 5, welche die Strömungskanäle bilden, erstrecken sich nicht genau in der durch die Längsachse A definierten axialen Richtung bzw. nicht nur auf die Längsachse hin geneigt, sondern die Erstreckung der Nuten 5 hat auch eine Komponente in Umfangsrichtung der Zerstäubungshülse 4. Zusätzlich zu der Neigung gegen die Längsachse A ist der Verlauf der Nuten 5 zumindest näherungsweise spiralförmig oder schraubenlinienförmig um die Längsachse A.To generate the swirl in the flow of atomizing medium, several measures are possible. The grooves 5, which form the flow channels, do not extend exactly in the axial direction defined by the longitudinal axis A or inclined not only on the longitudinal axis, but the extension of the grooves 5 also has a component in the circumferential direction of the Atomizing sleeve 4. In addition to the inclination against the longitudinal axis A, the course of the grooves 5 is at least approximately spirally or helically about the longitudinal axis A.

Eine weitere Massnahme zur Erzeugung des Dralls, besteht darin, den Einlasskanal 41, durch welchen das Zerstäubungsmedium in die Strömungskanäle gelangt, asymmetrisch bezüglich der Längsachse A anzuordnen. Der Einlasskanal 41 ist so angeordnet, dass seine Mittelachse die Längsachse A nicht schneidet, sondern einen senkrechten Abstand von der Längsachse A aufweist. Diese asymmetrische oder auch exzentrische Anordnung des Einlasskanals 41 bezüglich der Längsachse A hat zur Folge, dass das Zerstäubungsmedium, hier also die Druckluft, beim Eintreten in den Ringraum 6 in eine Rotations- oder Drallbewegung um die Längsachse A versetzt wird.Another measure for generating the twist is to arrange the inlet channel 41, through which the atomizing medium enters the flow channels, asymmetrically with respect to the longitudinal axis A. The inlet channel 41 is arranged so that its central axis does not intersect the longitudinal axis A, but has a vertical distance from the longitudinal axis A. This asymmetric or even eccentric arrangement of the inlet channel 41 with respect to the longitudinal axis A has the consequence that the atomizing medium, in this case the compressed air, when entering the annular space 6 in a rotational or swirling motion about the longitudinal axis A is added.

Um den Energieeintrag von dem Zerstäubungsmedium auf die aus der Austrittsöffnung 22 austretenden Komponenten zu steigern, ist es eine besonders vorteilhafte Massnahme, die Strömungskanäle nach dem Prinzip einer Lavaldüse auszugestalten mit einem sich in Strömungsrichtung gesehen zunächst verengenden und anschliessend erweiternden Strömungsquerschnitt. Um diese Verengung des Strömungsquerschnitts zu realisieren, stehen zwei Dimensionen zur Verfügung, nämlich die beiden Richtungen der zur Längsachse A senkrechten Ebene. Zumindest für die Strömungsrichtung der Druckluft ist in Fig. 2 zu sehen, dass sich die einzelnen Strömungskanäle zunächst verengen und dann wieder erweitern, so wie es für eine Lavaldüse typisch ist.In order to increase the energy input from the sputtering medium to the exiting from the outlet opening 22 components, it is a particularly advantageous measure to design the flow channels on the principle of a Laval nozzle with a first narrowing in the flow direction and then expanding flow cross-section. In order to realize this narrowing of the flow cross section, two dimensions are available, namely the two directions of the plane perpendicular to the longitudinal axis A. At least for the flow direction of the compressed air is in Fig. 2 to see that the individual flow channels initially narrow and then expand again, as is typical for a Laval nozzle.

Durch die Ausgestaltung der Nuten 5 bzw. der Strömungskanäle nach dem Prinzip einer Lavaldüse lässt sich die als Zerstäubungsmedium verwendete Luft auch stromabwärts der engsten Stelle noch zusätzlich mit kinetischer Energie beaufschlagen und damit beschleunigen. Dies geschieht wie bei einer Lavaldüse durch den sich in Strömungsrichtung wieder aufweitenden Strömungsquerschnitt.Due to the configuration of the grooves 5 and the flow channels according to the principle of a Laval nozzle, the air used as a sputtering medium can be additionally applied with kinetic energy downstream of the narrowest point and thus accelerate. As with a Laval nozzle, this happens through the flow cross-section widening again in the direction of flow.

Hieraus resultiert ein höherer Energieeintrag in die zu zerstäubenden Komponenten. Zusätzlich wird der Strahl durch diese Realisierung des Lavalprinzips stabilisiert. Die divergierende, das heisst sich wieder aufweitende Öffnung des jeweiligen Strömungskanals hat zudem den positiven Effekt einer Vermeidung oder zumindest einer deutlichen Reduktion von Fluktuationen im Strahl.This results in a higher energy input into the components to be atomized. In addition, the beam is stabilized by this realization of the lavaline principle. The diverging, that is again widening opening of the respective flow channel also has the positive effect of avoiding or at least a significant reduction of fluctuations in the beam.

Im Betrieb funktioniert dieses Ausführungsbeispiel wie folgt. Der statische Sprühmischer wird mittels seines Verbindungsstücks 23 mit einem Vorratsgefäss verbunden, welches die beiden Komponenten von einander getrennt enthält, beispielsweise mit einer Zwei-Komponenten-Kartusche. Der Einlasskanal 41 der Zerstäubungshülse 4 wird mit einer Quelle für das Zerstäubungsmedium, beispielsweise einer Druckluftquelle verbunden. Nun werden die beiden Komponenten ausgetragen, gelangen in den statischen Sprühmischer 100 und werden dort mittels des Mischelements 3 innig durchmischt. Als homogen durchmischtes Material gelangen die beiden Komponenten nach Durchströmen des Mischelements 3 durch den Ausgangsbereich 26 des Mischergehäuses 2 zur Austrittsöffnung 22. Die Druckluft strömt durch den Einlasskanal 41 der Zerstäubungshülse 4 in den Ringraum 6 zwischen der Innenfläche der Zerstäubungshülse 4 und der Aussenfläche des Mischergehäuses 2, erhält dabei durch die asymmetrische Anordnung einen Drall und gelangt von dort durch die Nuten 5, welche die Strömungskanäle bilden, zum distalen Ende 21 und somit zur Austrittsöffnung 22 des Mischergehäuses 3. Hier trifft die durch den Drall stabilisierte Druckluftströmung auf das durch die Austrittsöffnung 22 austretende durchmischte Material, zerstäubt es gleichmässig und transportiert es als Sprühstrahl zu dem zu behandelnden oder zu beschichtenden Substrat. Da bei einigen Anwendungen das Austragen der Komponenten aus dem Vorratsgefäss mit Druckluft bzw. druckluftunterstützt erfolgt, kann die Druckluft auch für die Zerstäubung verwendet werden.In operation, this embodiment operates as follows. The static spray mixer is connected by means of its connecting piece 23 to a storage vessel containing the two components separated from each other, for example with a two-component cartridge. The inlet channel 41 of the atomizing sleeve 4 is connected to a source of the atomizing medium, for example a compressed air source. Now, the two components are discharged, get into the static spray mixer 100 and are intimately mixed there by means of the mixing element 3. As homogeneously mixed material, the two components, after flowing through the mixing element 3, pass through the outlet region 26 of the mixer housing 2 to the outlet opening 22. The compressed air flows through the inlet channel 41 of the atomizing sleeve 4 into the annular space 6 between the inner surface of the atomizing sleeve 4 and the outer surface of the mixer housing 2 , Obtained by the asymmetric arrangement a twist and passes from there through the grooves 5, which form the flow channels, to the distal end 21 and thus to the outlet opening 22 of the mixer housing 3. Here the stabilized by the swirl compressed air flow meets the through the outlet opening 22nd Exiting mixed material, atomizes it evenly and transports it as a spray to the substrate to be treated or coated. Since in some applications the discharge of the components from the storage vessel takes place with compressed air or compressed air, the compressed air can also be used for the atomization.

Es wird nun ein Zwischenstück vorgeschlagen, welches speziell dafür ausgestaltet ist, mit einem solchen statischen Sprühmischer zusammenzuwirken. Fig. 3 zeigt eine perspektivische Darstellung eines Ausführungsbeispiels eines Zwischenstücks, das gesamthaft mit dem Bezugszeichen 1 bezeichnet ist, zusammen mit dem statischen Sprühmischer 100 in einer Explosionsdarstellung. Das Zwischenstück 1 ist speziell dafür ausgestaltet, um -ähnlich einem Adapterzwischen dem distalen Endbereich des Mischergehäuses 2 und der Zerstäubungshülse 4 angeordnet zu werden.An intermediate piece is now proposed, which is specially designed to interact with such a static spray mixer. Fig. 3 shows a perspective view of an embodiment of an intermediate piece, which is generally designated by the reference numeral 1, together with the static spray mixer 100 in an exploded view. The intermediate piece 1 is specially designed to be arranged like an adapter between the distal end region of the mixer housing 2 and the atomizing sleeve 4.

Das Zwischenstück 1 umfasst einen Einlassbereich 11 zum Zusammenwirken mit dem distalen Endbereich 27 des Mischergehäuses 2 sowie einen Auslassbereich 12 zum Zusammenwirken mit der Zerstäubungshülse 4. Der Auslassbereich 12 umfasst einen Auslass 14, durch welchen die durchmischten Komponenten austreten können. Der Einlassbereich 11 und der Auslassbereich 12 schliessen einen von Null verschiedenen Umlenkwinkel α ein. Damit ist gemeint, dass die Achse, in deren Richtung sich der Einlassbereich 11 erstreckt (hier die Längsachse A des Mischergehäuses) und die Achse B, in deren Richtung sich der Auslassbereich 12 erstreckt, den Umlenkwinkel α einschliessen. Der Umlenkwinkel α ist auch von 180° verschieden. Der Auslassbereich 12 weist an seinem dem Einlassbereich 11 abgewandten Ende einen Endabschnitt 13 auf, dessen Aussenkontor gleich derjenigen des Mischergehäuses 2 ist, sodass der Endabschnitt 13 des Auslassbereichs 12 in gleicher Weise mit der Zerstäubungshülse 4 zusammenwirken kann wie der distale Endbereich 27 des Mischergehäuses 2. Somit bleiben alle die positiven strömungsmechanischen Eigenschaften, die durch das Zusammenwirken zwischen der Zerstäubungshülse 4 und dem distalen Endbereich 27 realisiert werden, in gleicher Qualität erhalten, wenn der Endabschnitt 13 des Auslassbereichs 12 des Zwischenstücks 1 mit der Zerstäubungshülse 4 zusammenwirkt. In analoger Weise wie vorne schon beschrieben, bilden sich durch die Nuten 5 (siehe Fig. 2) in der Innenfläche der Zerstäubungshülse 4 zwischen dem Endabschnitt 13 des Auslassbereichs 12 und der Zerstäubungshülse 4 die separaten Strömungskanäle aus, durch welche das Zerstäubungsmedium in gleicher Weise in Form einzelner Druckluftstrahlen (bzw. Strahlen des Zerstäubungsmediums) zum Austrittsende gelangt. Dort sind die Druckluftstrahlen zunächst bei ihrem Austritt als diskrete Einzelstrahlen ausgebildet, die sich dann aufgrund ihrer Drallbehaftung zu einem gleichmässigen stabilen Gesamtstrahl vereinigen, welcher die aus dem Auslass 14 austretenden durchmischten Komponenten zerstäubt. Dieser Gesamtstrahl hat vorzugsweise einen kegelförmigen Verlauf.The intermediate piece 1 comprises an inlet region 11 for cooperation with the distal end region 27 of the mixer housing 2 and an outlet region 12 for cooperation with the atomizing sleeve 4. The outlet region 12 comprises an outlet 14, through which the mixed components can emerge. The inlet region 11 and the outlet region 12 include a non-zero deflection angle α. By this is meant that the axis in the direction of which the inlet region 11 extends (here the longitudinal axis A of the mixer housing) and the axis B, in the direction of which the outlet region 12 extends, enclose the deflection angle α. The deflection angle α is also different from 180 °. The outlet region 12 has, at its end facing away from the inlet region 11, an end section 13 whose outside contour is equal to that of the mixer housing 2, so that the end section 13 of the outlet region 12 can co-operate with the atomizing sleeve 4 in the same way as the distal end region 27 of the mixer housing 2. Thus, all the positive fluid mechanical properties realized by the cooperation between the atomizing sleeve 4 and the distal end portion 27 remain the same quality when the end portion 13 of the outlet portion 12 of the intermediate piece 1 cooperates with the atomizing sleeve 4. In an analogous manner as already described above, formed by the grooves 5 (see Fig. 2 ) in the inner surface of the atomizing sleeve 4 between the end portion 13 of the outlet portion 12 and the atomizing sleeve 4, the separate flow channels through which passes the sputtering medium in the same way in the form of individual compressed air jets (or jets of Zerstäubungsmediums) to the outlet end. There, the compressed air jets are first formed at their exit as discrete individual jets, which then unite due to their swirl attachment to a uniform stable overall jet, which atomizes the exiting from the outlet 14 mixed components. This total jet preferably has a conical shape.

Der Endabschnitt 13 des Auslassbereichs 12 ist somit eine Nachbildung des distalen Endes des Mischergehäuses 2.The end portion 13 of the outlet portion 12 is thus a replica of the distal end of the mixer housing 2.

Durch den von Null verschiedenen Umlenkwinkel a kann mit Hilfe des Zwischenstücks 1 auch an schwierig zugänglichen Stellen in einfacher Weise gesprüht werden. Unter praktischen Aspekten ist es bevorzugt, wenn der Umlenkwinkel α im Bereich von 45° bis 135° liegt, insbesondere im Bereich von 60° bis 120°. Bei dem hier beschriebenen Ausführungsbeispiel ist der Umlenkwinkel α gleich 90°, was für viele Anwendungsfälle vorteilhaft ist. Es versteht sich jedoch, dass auch beliebige andere Umlenkwinkel α möglich sind.Due to the non-zero deflection angle a can be sprayed with the help of the intermediate piece 1 even in difficult to reach places in a simple manner. In practical terms, it is preferred if the deflection angle α is in the range of 45 ° to 135 °, in particular in the range of 60 ° to 120 °. In the embodiment described here, the deflection angle α is equal to 90 °, which is advantageous for many applications. It is understood, however, that any other deflection angle α are possible.

Für den Betrieb wird der Einlassbereich 11 des Zwischenstücks 1 mit dem distalen Ende des Mischergehäuses 2 verbunden und die Zerstäubungshülse 4 wird auf den Auslassbereich 12 des Zwischenstücks 1 aufgesetzt. Fig. 6 zeigt ein Ausführungsbeispiel im zusammengesetzten Zustand.For operation, the inlet portion 11 of the intermediate piece 1 is connected to the distal end of the mixer housing 2 and the atomizing sleeve 4 is placed on the outlet portion 12 of the intermediate piece 1. Fig. 6 shows an embodiment in the assembled state.

Vorzugsweise ist die Innenkontur des Einlassbereichs 11 des Zwischenstücks 1 so bemessen, dass der Einlassbereich 11 flächig an dem distalen Endbereich 27 des Mischergehäuses 2 anliegt. Hierdurch wird gewährleistet, dass die aus dem Mischergehäuse 2 austretenden durchmischten Komponenten vollständig in das Zwischenstück einströmen und keine Leckagen zwischen dem Mischergehäuse 2 und dem Zwischenstück 1 auftreten.Preferably, the inner contour of the inlet region 11 of the intermediate piece 1 is dimensioned such that the inlet region 11 lies flat against the distal end region 27 of the mixer housing 2. This ensures that the mixed components emerging from the mixer housing 2 flow completely into the intermediate piece and no leaks between the mixer housing 2 and the intermediate piece 1 occur.

Der Einlassbereich 11 ist vorzugsweise gewindefrei mit dem Mischergehäuse 2 verbindbar, weil hierdurch eine besonders einfache Handhabung gewährleistet ist. Besonders bevorzugt ist der Einlassbereich 11 über eine Schnappverbindung mit dem Mischergehäuse verbunden, in sinngemäss gleicher Weise wie dies anhand von Fig. 2 für die Verbindung der Zerstäubungshülse 4 mit dem Mischergehäuse 2 beschrieben ist. Dazu ist an der Innenfläche des Einlassbereichs 11 des Zwischenstücks - in sinngemäss gleicher Weise wie in Fig. 2 für die Zerstäubungshülse 4 gezeigt - eine Umfangsnut vorgesehen (entsprechend der Umfangsnut 43 in Fig. 2), welche zum Zusammenwirken mit der flanschartigen Erhebung 24 am Mischergehäuse 2 ausgestaltet ist. Wird der Einlassbereich 11 über das Mischergehäuse 2 geschoben, so schnappt die Erhebung 24 in die Umfangsnut ein und sorgt für eine stabile Verbindung des Zwischenstücks 1 mit dem Mischergehäuse 2. Vorzugsweise ist diese Schnappverbindung dichtend ausgestaltet, sodass auch hierdurch eine Dichtwirkung erzielt wird, die eine Leckage bzw. ein Rückwärtsströmen der durchmischten Komponenten verhindert.The inlet region 11 is preferably connected thread-free with the mixer housing 2, because this ensures a particularly simple handling. Particularly preferably, the inlet region 11 is connected via a snap connection with the mixer housing, in a manner similar to that described with reference to FIG Fig. 2 for the connection of the atomizing sleeve 4 with the mixer housing 2 is described. For this purpose, on the inner surface of the inlet portion 11 of the intermediate piece - in a similar manner as in Fig. 2 for the atomizing sleeve 4 - a circumferential groove provided (corresponding to the circumferential groove 43 in FIG Fig. 2 ), which is configured to cooperate with the flange-like elevation 24 on the mixer housing 2. If the inlet region 11 is pushed over the mixer housing 2, the projection 24 snaps into the circumferential groove and ensures a stable connection of the intermediate piece 1 to the mixer housing 2. Preferably, this snap connection is designed to be sealing, so that a sealing effect is achieved as well Leakage or a reverse flow of the mixed components prevented.

Die Verbindung des Zwischenstücks 1 mit dem Mischergehäuse 2 über eine Umfangsnut und die darein eingreifende Erhebung 24 hat den weiteren Vorteil, dass das Zwischenstück 1 bezüglich des Mischergegäuses 2 um die Längsachse A drehbar ist, wodurch sich die Flexibilität bezüglich der Anwendungen noch erhöht.The connection of the intermediate piece 1 with the mixer housing 2 via a circumferential groove and the protruding elevation 24 has the further advantage that the intermediate piece 1 with respect to the mixer frame 2 is rotatable about the longitudinal axis A, whereby the flexibility increases with respect to the applications.

Der Auslassbereich 12 des Zwischenstücks 1 ist vorzugsweise gewindefrei mit der Zerstäubungshülse 4 verbindbar. Eine bevorzugte Verbindung ist eine Schnappverbindung. Dazu weist der Auslassbereich 12 an seinem dem Einlassbereich 11 zugewandten Ende eine scheibenförmige Abschlussplatte 15 auf, welche so ausgestaltet ist, dass sie dichtend in die Umfangsnut 43 (Fig. 2) der Zerstäubungshülse 4 eingreifen kann, in sinngemäss gleicher Weise wie dies anhand von Fig. 2 für die Erhebung 24 des Mischergehäuses 2 erklärt wurde. Durch diese Massnahme wird ein unerwünschtes Austreten des Zerstäubungsmediums während des Betriebs effizient verhindert.The outlet region 12 of the intermediate piece 1 is preferably connected thread-free with the atomizing sleeve 4. A preferred compound is a snap connection. For this purpose, the outlet region 12 has, at its end facing the inlet region 11, a disk-shaped end plate 15, which is designed such that it seals in the circumferential groove 43 (FIG. Fig. 2 ) of the atomizing sleeve 4 can intervene, in a manner analogous to this based on Fig. 2 was declared for the survey 24 of the mixer housing 2. By this measure, an undesirable leakage of the sputtering medium during operation is effectively prevented.

Die Verbindung zwischen dem Auslassbereich 12 und der Zerstäubungshülse 4 über die Abschlussplatte 15 und die Umfangsnut 43 hat ferner den Vorteil, dass die Zerstäubungshülse 4 um die Richtung der Achse B herum um den Auslassbereich drehbar ist, sodass im Betrieb die Druckluftzufuhr bzw. die Zufuhr des Zerstäubungsmediums von jeder lateralen Position erfolgen kann.The connection between the outlet region 12 and the atomizing sleeve 4 via the end plate 15 and the circumferential groove 43 also has the advantage that the atomizing sleeve 4 is rotatable about the outlet region around the axis B direction, so that in operation the supply of compressed air or the supply of the Sputtering medium can be made from any lateral position.

Der Auslassbereich 12, weisst ferner einen zentralen Kanal 16 für die durchmischten Komponenten auf, der sich bis zum Auslass 14 erstreckt und der einen im Wesentlichen konstanten Innendurchmesser aufweist. Durch diese Massnahme ist der Auslass 14 des Zwischenstücks 1 ein Abbild der Austrittsöffnung 22 des Mischergehäuses 2. Auch diese Massnahme gewährleistet, dass die strömungsmechanischen Verhältnisse am Auslass 14 des Zwischenstücks 1 zumindest annähernd gleiche sind, wie wenn die Zerstäubungshülse 4 direkt auf das Mischergehäuse 2 aufgesetzt wird. Folglich sind durch das Zwischenstück 1 keine Zugeständnisse an die Qualität des Sprühvorgangs vonnöten.The outlet portion 12 further includes a central channel 16 for the mixed components extending to the outlet 14 and having a substantially constant inner diameter. By this measure, the outlet 14 of the intermediate piece 1 is an image of the outlet opening 22 of the mixer housing 2. This measure ensures that the fluid mechanical conditions at the outlet 14 of the intermediate piece 1 are at least approximately the same as when the atomizing sleeve 4 placed directly on the mixer housing 2 becomes. Consequently, no compromise on the quality of the spray process is required by the spacer 1.

Beim Betrieb der Kombination des Zwischenstücks 1 mit dem Sprühmischer 100 (siehe Fig. 6) wird das Zerstäubungsmedium, beispielsweise Druckluft, durch den Einlasskanal 41 in die Zerstäubungshülse 4 eingebracht, strömt von dort in den Auslassbereich 12 des Zwischenstücks 1 ein, wo ein unerwünschtes rückwärtiges Austreten durch die Abschlussplatte 15 verhindert wird und gelangt entlang der Aussenseite des Kanals 16 zum Endabschnitt 13, um dort in die durch die Nuten 5 in der Zerstäubungshülse und den Endabschnitt 13 gebildeten separaten Strömungskanäle einzuströmen, durch welche das Zerstäubungsmedium in den Bereich des Auslasses 14 gelangt, wo es die dort austretenden durchmischten Komponenten zerstäubt.When operating the combination of the intermediate piece 1 with the spray mixer 100 (see Fig. 6 ), the atomizing medium, for example compressed air, introduced through the inlet channel 41 into the atomizing sleeve 4, flows from there into the outlet region 12 of the intermediate piece 1, where an undesirable backward leakage is prevented by the end plate 15 and passes along the outside of the channel 16 to End portion 13, there to flow into the formed by the grooves 5 in the sputtering sleeve and the end portion 13 separate flow channels through which the sputtering medium reaches the region of the outlet 14, where it mixed the there exiting mixed Atomized components.

Eine weiter konstruktive Massnahme besteht darin, zwischen der Abschlussplatte 15 und dem Endabschnitt 13 des Auslassbereichs 12 mindestens ein Führungselement 17 vorzusehen, dessen Aussendurchmesser der Aussenkontur des distalen Endbereichs 27 des Mischergehäuses nachgebildet ist. Damit ist gemeint, dass das Führungselement 17, das eine bestimmte Entfernung - bezüglich der durch die Achse B festgelegten Richtung- vom Auslass 14 des Zwischenstücks 1 entfernt ist, im Wesentlichen den gleichen Aussendurchmesser aufweist wie das Mischergehäuse 2 an derjenigen Stelle, die sich in gleicher Entfernung von der Austrittsöffnung 22 des Mischergehäuses befindet. Auch diese Massnahme kann positiv dazu beitragen, dass die Strömungsverhältnisse für das unter Druck eingebrachte Zerstäubungsmedium am Ende des Zwischenstücks 1 vergleichbar oder gleich denjenigen sind, wie sie ohne das Zwischenstück 1 an der Austrittsöffnung 22 des Mischergehäuses 2 wären.A further constructive measure consists in providing at least one guide element 17 between the end plate 15 and the end section 13 of the outlet region 12, whose outer diameter is modeled on the outer contour of the distal end region 27 of the mixer housing. By this it is meant that the guide element 17, which is a certain distance away from the outlet 14 of the intermediate piece 1 with respect to the direction defined by the axis B, has substantially the same outer diameter as the mixer housing 2 at the point which is in the same position Distance from the outlet opening 22 of the mixer housing is located. This measure can also contribute positively to the fact that the flow conditions for the pressurized atomizing medium at the end of the intermediate piece 1 are comparable or equal to those which would be without the intermediate piece 1 at the outlet opening 22 of the mixer housing 2.

Bei dem Ausführungsbeispiel gemäss Fig. 3 ist genau ein Führungselement 17 vorgesehen. Dieses Führungselement 17 ist scheibenförmig ausgestaltet und hat im Wesentlichen den gleichen Aussendurchmesser wie das Mischergehäuse 2 an derjenigen Stelle, die gleichweit von der Austrittsöffnung 22 entfernt ist wie das Führungselement 17 vom Auslass 14 des Zwischenstücks 1.In the embodiment according to Fig. 3 exactly one guide element 17 is provided. This guide element 17 is designed disk-shaped and has substantially the same outer diameter as the mixer housing 2 at the point which is equidistant from the outlet opening 22 as the guide member 17 from the outlet 14 of the intermediate piece. 1

In den Fig. 4 und 5 ist jeweils in perspektivischer Darstellung ein anderes Ausführungsbeispiel des Zwischenstücks 1 dargestellt, wobei das Zwischenstück 1 auf das Mischergehäuse 2 aufgesetzt ist. Im Folgenden werden nur die Unterschiede zu dem in Fig. 3 dargestellten Ausführungsbeispiel erläutert, ansonsten gelten die im Zusammenhang mit dem Ausführungsbeispiel in Fig. 3 gemachten Erläuterungen in sinngemäss gleicher Weise auch für die Ausführungsbeispiele gemäss Fig. 4 und Fig. 5.In the Fig. 4 and 5 In each case a perspective view of another embodiment of the intermediate piece 1 is shown, wherein the intermediate piece 1 is placed on the mixer housing 2. The following are just the differences to the in Fig. 3 illustrated embodiment, otherwise apply in connection with the embodiment in Fig. 3 Explanations made in accordance with the same manner also for the embodiments according to Fig. 4 and Fig. 5 ,

Bei dem Ausführungsbeispiel gemäss Fig. 4 sind an dem Zwischenstück 1 mehrere bezüglich der durch die Achse B festgelegten Richtung hintereinander angeordnete jeweils scheibenförmige Führungselemente 17 vorgesehen, nämlich vier. Der Aussendurchmesser der Führungselemente 17 ist dem Aussendurchmesser des Mischergehäuses 2 nachgebildet.In the embodiment according to Fig. 4 are provided at the intermediate piece 1 more with respect to the direction defined by the axis B direction one behind the other arranged disc-shaped guide elements 17, namely four. The outer diameter of the guide elements 17 is modeled on the outer diameter of the mixer housing 2.

Bei dem Ausführungsbeispiel gemäss Fig. 5 ist ein Führungselement 17 vorgesehen, das als schraubenförmiges Führungselement 17 ausgestaltet ist. Das Führungselement 17 erstreckt sich schraubenförmig um den Kanal 17 herum, wobei der Aussendurchmesser des Führungselements dem Aussendurchmesser des Mischergehäuses nachgebildet ist.In the embodiment according to Fig. 5 a guide element 17 is provided, which is configured as a helical guide element 17. The guide element 17 extends helically around the channel 17, wherein the outer diameter of the guide element is modeled on the outer diameter of the mixer housing.

Fig. 6 zeigt in perspektivischer Darstellung eine Kombination eines statischen Sprühmischers 100 mit einem der Ausführungsbeispiele des Zwischenstücks im für den Betrieb zusammengesetzten Zustand. Fig. 6 shows in perspective a combination of a static spray mixer 100 with one of the embodiments of the intermediate piece in the assembled state for operation.

Es ist auch möglich, das Zwischenstück 1 so auszugestalten, dass der Umlenkwinkel α veränderbar ist, entweder in diskreten Schritten oder kontinuierlich. Dazu kann beispielsweise zwischen dem Einlassbereich und dem Auslassbereich eine gelenkige Verbindung, z.B. ein Scharnier oder Kugelgelenk vorgesehen sein.It is also possible to design the intermediate piece 1 such that the deflection angle α is variable, either in discrete steps or continuously. For this purpose, for example, between the inlet area and the outlet area an articulated connection, e.g. a hinge or ball joint may be provided.

Eine weitere Möglichkeit für die erfindungsgemässe Kombination ist es, das Zwischenstück 1 an das Mischergehäuse 2 anzuformen, sodass das Zwischenstück einstückig mit dem Mischergehäuse ist. Das Zwischenstück 1 bildet dann das Ende des Mischergehäuses 2, welches um den Umlenkwinkel α-also beispielsweise um 90°- gegen die Längsachse A des Mischergehäuses abgewinkelt ist. Herstellungstechnisch ist es kein Problem eine solche einstückige Ausgestaltung zu realieseren. Dies ist beispielsweise mit Spritzgiessverfahren möglich.Another possibility for the inventive combination is to form the intermediate piece 1 to the mixer housing 2, so that the intermediate piece is integral with the mixer housing. The intermediate piece 1 then forms the end of the mixer housing 2, which is angled by the deflection angle α-for example by 90 ° - against the longitudinal axis A of the mixer housing. In terms of production technology, it is no problem to realize such a one-piece design. This is possible, for example, with injection molding.

Claims (13)

  1. A combination of a static spray mixer for mixing and spraying at least two flowable components with an intermediate piece, wherein the static spray mixer has a tubular mixer housing (2) having at least one mixing element (3) and an atomization sleeve (4), wherein the mixer housing (2) extends in the direction of a longitudinal axis (A) up to a distal end (21) which has an outlet opening (22) for the components, and wherein the atomization sleeve (4) has an inlet passage (41) for a pressurized atomization medium and an inner surface having a plurality of separate grooves (5) which can form separate flow passages together with the mixer housing (2), characterized in that the intermediate piece (1) has an inlet region (11) for cooperating with the distal end region (27) of the mixer housing (2) and an outlet region (12) for cooperating with the atomization sleeve (4), with the inlet region (11) and the outlet region (12) including a deflection angle (a) different from zero, and with the outlet region (12) having at its end remote from the inlet region (11) an end section (13) whose outer contour is the same as that of the mixer housing (2) so that the end section (13) of the outlet region (12) can cooperate with the atomization sleeve (4) in the same manner as the distal end region (27) of the mixer housing (2) can cooperate with the atomization sleeve (4).
  2. A combination in accordance with claim 1, in which the deflection angle (a) between the inlet region (11) and the outlet region (12) lies in a range from 45 to 135 degrees, preferably in a range from 60 to 120 degrees.
  3. A combination in accordance with claim 1 or claim 2, in which the deflection angle (a) between the inlet region (11) and the outlet region (12) amounts to 90 degrees.
  4. A combination in accordance with any one of the preceding claims, in which the inner contour of the inlet region (11) is dimensioned so that the latter can areally contact the distal end region (27) of the mixer housing (2).
  5. A combination in accordance with any one of the preceding claims, in which the inlet region (11) is connectable to the mixer housing (2) in a thread-free manner.
  6. A combination in accordance with any one of the preceding claims, in which the outlet region (12) is connectable to the atomization sleeve (4) in a thread-free manner.
  7. A combination in accordance with any one of the preceding claims, in which the outlet region (12) has at its end facing the inlet region (11) an end plate (15) which is configured to engage into the atomization sleeve (4) so that an exiting of the atomization medium is prevented by the end plate (15) during operation.
  8. A combination in accordance with any one of the preceding claims, in which the outlet region (12) has a passage (16) for the mixed components which has a substantially constant inner diameter.
  9. A combination in accordance with one of the claims 7 or 8, in which at least one guide element (17) whose outer diameter is modeled on the outer contour of the distal end region (27) of the mixer housing (2) is provided between the end plate (15) and the end section (13) of the outlet region (12).
  10. A combination in accordance with claim 9, wherein a plurality of respective disk-shaped guide elements (17) arranged behind one another are provided whose outer diameter is modeled on the outer diameter of the mixer housing (2).
  11. A combination in accordance with claim 9, wherein a helical guide element (17) is provided whose outer diameter is modeled on the outer diameter of the mixer housing (2).
  12. A combination in accordance with any one of the preceding claims, in which the atomization sleeve (4) is connectable to the intermediate piece such that the atomization sleeve (4) is rotatable about the intermediate piece (1).
  13. A combination in accordance with any one of the preceding claims, in which the intermediate piece is shaped to the mixer housing (2) so that the intermediate piece is in one piece with the mixer housing.
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BR102012012110A8 (en) 2018-04-24
RU2012121192A (en) 2013-11-27
CN102794120B (en) 2017-09-01
TW201313326A (en) 2013-04-01
BR102012012110B1 (en) 2020-12-15
BR102012012110A2 (en) 2015-08-11
KR102062250B1 (en) 2020-01-03
JP2012240047A (en) 2012-12-10
CA2770962A1 (en) 2012-11-23
TWI586439B (en) 2017-06-11
US20120298775A1 (en) 2012-11-29
EP2527041A1 (en) 2012-11-28
CA2770962C (en) 2018-11-27
US9393531B2 (en) 2016-07-19
KR20190031456A (en) 2019-03-26
ES2699955T3 (en) 2019-02-13
JP6005978B2 (en) 2016-10-12
CN102794120A (en) 2012-11-28

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