EP1312409B1 - Mixing tube with a longitudinal element - Google Patents

Abstract

A mixer assembly comprises a longitudinal tube incorporating an array of baffle plates, with alternating profiles generating a laminar mixing sequence for two ingredients (A, B). The tubular mixer baffles have a hybrid structure, with one group of guide vanes (Q) alternating with another (X) different set of vanes. <??>The assembly mixes substances which are not easily miscible. The first baffle section creates a laminar flow in the first substance. The second different section sets up a laminar flow in the second substance. Each substance transversely intersects the other substance's flow-path. One section has a structure (Q) comprising a group of four strands with mixing compartments (18) extending between two ends (14a, 14b), and longitudinally transposed (11) with respect to adjacent compartments. This structure (Q) generally dominates the mixing pipe. The second structure (X) (8) has cross-pieces (81, 82) which are inclined with respect to the longitudinal plane. The structures (Q, X) are made of injection molded plastic.

Description

The invention relates to a pipe mixer with a longitudinal Mounting body according to the preamble of claim 1 and uses of the Mixer.

From EP-A-1 125 625 is such a static mixer for performing a laminar mixing process known in which highly viscous substances such For example, sealants, two-component foams or Two-component adhesives are mixed. This mixer is as "Disposable mixer" usable for a single use. He is a Pipe mixer with a longitudinal body installation, which is a special Structure has. This mixer structure is made by modifications of a Derived basic structure. The modifications are aimed at "mixed-resistant flow filaments", which at one with the basic structure performed laminar mixing process, in order to improve the Influence mixing results. With the term "mixed-resistant Streamline ", hereafter referred to as" mix-resistant strand ", one refers to the appearance that there are streaming threads that are out only one of the components to be mixed is the mixer structure going through and doing virtually none or only an insufficient Learn to mix with adjacent flow threads.

The object of the invention is a pipe mixer with a longitudinal Incorporating body in which the occurrence of mixed-resistant Strähnen is suppressed by further measures. This task will solved by the pipe mixer defined in claim 1.

The tube mixer includes a longitudinal body assembly, with a laminar mixing process in a laminar flowing through the mixer Medium can be effected. The tube mixer has a hybrid structure. It At least two longitudinal sections are combined, the different Have mixer structures. It leaves a first section a mix resistant strand associate, which results, if with the first, in a pipe mixer structure performed a laminar mixing process becomes. Another mix-resistant tress is assignable according to a second section, the adjacent to the first section and having a second structure. At the transition between the sections are the mixed-resistant strands transversely offset against each other.

The dependent claims 2 to 9 relate to advantageous embodiments the pipe mixer according to the invention. One possible use of The pipe mixer according to the invention is the subject of claim 10.

The longitudinal mounting body has in an advantageous embodiment a hybrid structure having differently structured sections. this Sections are attributable to mixed-resistant strands that are transversal offset against each other, so that none of these strands is a continuation each forming a mixed-resistant strand, which in an adjacent Section occurs

Fig. 1

einen statischen Mischer mit einem bekannten, longitudinaten Einbaukörper, der eine nicht modifizierte Grundstruktur aufweist und der Teil einer Vorrichtung ist,

Fig. 2

einen ähnlichen Einbaukörper wie in Fig. 1,

Fig. 3

einen Abschnitt eines Einbaukörpers, der eine andere Mischerstruktur aufweist,

Fig. 4

drei Beispiele für erfindungsgemässe Hybridstrukturen, in denen verschiedene Mischerstrukturen kombiniert sind,

Fig. 5

eine dritte Mischerstruktur,

Fig. 6

Elemente zu einer "Multiflux"- Mischerstruktur,

Fig. 7

eine "Multiflux"- Mischerstruktur,

Fig. 8

eine Mischerstruktur mit sich kreuzenden Stegen,

Fig. 9

einen Abschnitt aus einem bekannten Wendelmischer und

Fig. 10

ein weiteres Beispiel zu einem Hybridstruktur-Abschnitt.

The invention will be explained with reference to the drawings. Show it:

Fig. 1

a static mixer with a known, longitudinal body incorporating a non-modified basic structure and which is part of a device,

Fig. 2

a similar installation body as in Fig. 1,

Fig. 3

a portion of an installation body having a different mixer structure,

Fig. 4

three examples of inventive hybrid structures in which different mixer structures are combined,

Fig. 5

a third mixer structure,

Fig. 6

Elements to a "Multiflux" mixer structure,

Fig. 7

a "Multiflux" mixer structure,

Fig. 8

a mixer structure with intersecting webs,

Fig. 9

a section of a known spiral mixer and

Fig. 10

another example of a hybrid structure section.

In Fig. 1, a device 100 is indicated by dash-dotted lines. This contains a static mixer with a longitudinal body 1, through which a mixer structure with a regular, unmodified Basic structure is formed. The mixer structure is shown in Fig. 1 as a side view and in Fig. 2 - slightly modified-as a perspective view from below displayed. This basic structure is known from the publications EP-A-0 749 776 and EP-A-0 815 929, in which they refer to two different Wise has been described: The basic structure consists of a Variety of mixing elements in a tube 10 (with a Longitudinal axis or longitudinal direction 11) are arranged one behind the other; or - according to the second definition - it consists of a bundle of four chambered strands, with Mischkammem 18 ("mixed effective Chambers "), each between two closed ends 14 a and Extend 14b and with respect to adjacent Kammem 18 in longitudinal Direction 11 are arranged offset. Each of the mixing elements (first Definition) comprises two axial sections, each of the sections at least one dividing web 12 or 13 dividing the section (radial Walls) is assigned. The dividers 12, 13 intersect and divide the pipe cross section in equal areas. The faces are either open or covered by pulleys 14.

The mixing chambers 18 of the basic structure (second definition) are the same size and offset from each other. Two inputs 16a, 16b and two Outputs 17a, 17b arranged in an alternate sequence, form connections to four adjacent mixing chambers 18. Two lateral Reinforcement walls 15 extend over the entire length of the longitudinal installation body 1.

The fragmentary shown in Fig. 2 and shown with a view from below Mounting body 2 is opposite to that of FIG. 1 by 90 ° about the longitudinal axis eleventh turned. 2 gives a more vivid picture of the structural elements, namely the dividing webs 12, 13 and the deflecting plates 14. It is only one the lateral reinforcing walls 15 available. From the other, cut away wall is a dot-dash line an inner surface 15 ' indicated. The section of the installation body 2 shown contains two complete mixing chambers 18. The structure shown in FIGS. 1 and 2 is hereinafter referred to as "structure Q". This structure Q, the one regular basic structure can also be structurally modified in some places (see EP-A-1 125 625). The term "structure Q" should be additional also refer to the modified basic structure.

The device 100 comprises a two-chambered container 100a, namely a cartridge, with combs 101 and 102. These are used for separate Inclusion of two flowable components A and B. Through outlets of the container 100a, A and B can by means of pistons 111 and 112 in the tube 10 are pressed (arrows A ', B'). After mixing A with B in the static mixer, consisting of the tube 10 and the longitudinal Assembly body 1 and 2 composed, the mixture passes through a nozzle 120 from the device 100 from. The cartridge 100a may be more than two Kammem include. The tube 10 is shown as one on the cartridge 100a attachable pipe part formed.

Instead of the device 100, for example, a metering device be used, in which the inventive pipe mixer is used. The components A and B are in separate containers containing them by means of pumps, in particular dosing pumps, into the mixer.

Fig. 3 shows - with a view from below - an element 3, which is a new, something represents a more complicated example of a mixer structure. This element is 3 intended to the inventive hybrid structure, for example in Combination with the known structure Q to form. The visible part of the Elements 3 with U-shaped transverse channels 31 and 32 extends to one longitudinal center plane. On the opposite side is behind this mid-plane the structure is formed inversely to the visible part, so that the transverse channels 31 and 32 in their extension respectively in breakthroughs on the opposite side pass. These breakthroughs correspond to breakthroughs 33 and 34 on the visible side.

In the three examples of FIG. 4 are hybrid structures according to the invention represented by combinations of the structure Q with structures X, X 'and The structure X may be a so-called "SMX" structure; this is illustrated in FIG. 8. The structure X can also be the element 3 of the 3 or a plate assembly 5, as illustrated in FIG. 5, namely a modified structure Q, in which the separating webs 13 and 14 are removed and the plurality of mixing elements (according to the first Definition). The structure X 'in FIG. 4 corresponds to the lower half of FIG Structure X. The structure X "has webs that are in an alternating Lying on two intersecting planes. The crossroads these planes lie on a longitudinal midplane parallel to the plane Image plane is. The bars are located on the lower side of the Crossing line.

Said structure Q comprises in the installation body 1, preferably a Proportion that outweighs, in particular - in terms of length - greater than 50% is. Mixed-resistant strands that are in the structure Q The resulting sections will be in downstream structures X, X 'or X "dissolved or at least translocated dislocated so that they are in Further sections no longer appear as mixed-resistant strands to step.

It is advantageous if, following the cartridge 100a, a structure X upstream of the structure Q. Because with an unfavorable orientation of Structure Q with respect to the cartridge cases 101, 102 carries the Entrance of the structure Q, the first divider 12 or 13 includes nothing to the mixing process. The structure X has the orientation a minor influence on the mixing effect.

The portions of the longitudinal mounting body 1 may be separate parts. But it is more advantageous if the mounting body 1 a whole or in part coherent piece forms, this piece a combination of comprises at least two longitudinal sections. It is particularly advantageous if all sections together form a monolithic installation body 1, which can be produced by a casting process, in particular by means of a Injection molding technology can be produced from a thermoplastic.

From the above-mentioned EP-A-0 749 776 it is known that the structure Q has a similarity to a so-called "Multiflux" mixer structure. The Mixer structure 6 of Fig. 7 with the structural elements shown in Fig. 6 6 a, 6 b is a structure converted into a "multiflux" mixer structure 6 Q. The longitudinal installation body 1 of the pipe mixer according to the invention may be used in sections instead of the structure Q or in addition to the structure Q contain the mixer structure 6. In the structural elements 6a, 6b appear instead of the deflecting plate 4 of the structure Q, voluminous bodies 64a, 64a ', 64b and 64b ', each in the form of two wedged wedges to have. In the mixer structure 6, the structural elements 6a, 6b form between two side walls 65 in an old arrangement a dense sequence.

The element 8 shown in FIG. 8 has a structure ("SMX") with webs 81, 82 inclined with respect to the longitudinal direction of the pipe mixer are. Adjacent webs 81, 82 are arranged in a crossing position Die front of two side walls 85 is cut away and dash-dotted as Surface 85 'indicated. The webs 81, 82 may be different widths, so that gaps between individual webs and the inner surface of the Tube 10 result.

The tube mixer may also have a circular cross-section (see EP-A- 0 749 776). In this case, sections can also be used for the hybrid structure with a known helical structure 9 - see Fig. 9 - are used.

Fig. 10 shows another example of a section which does not yet have one has known mixer structure 10.

The pipe mixer according to the invention can be used for mixing a high-viscosity components A with at least one further component B in a device 100 - see Fig. 1- use. The other component B may have a viscosity 10 to 1000 times lower than the viscosity have high viscosity component A. Or the mass flow of others Component B can be many times smaller than the mass flow of be highly viscous component A.

Claims (10)

1. A tube mixer having a longitudinal built-in body (1) with which a laminar mixing process can be brought about in a medium (A, B) flowing through the mixer in a laminar manner,
   characterised by a hybrid structure of the tube mixer in which at least two longitudinal sections are combined which have different mixer structures (X, Q), wherein a mix-resistant strand can be associated with a first section with a first structure (X), said mix-resistant strand resulting when a laminar mixing process is carried out with the first structure inserted into a tube-mixer; wherein, furthermore, a further mix-resistant strand can be correspondingly associated with a second section which is adjacent to the first section and has a second structure (Q); and wherein the mix-resistant strands are offset transversely with respect to one another at the transition between the two sections.
2. A tube mixer in accordance with claim 1, characterised in that the longitudinal built-in body (1) has a hybrid structure with differently structured sections, wherein mix-resistant strands, which are offset transversely with respect to one another, can be associated with these sections.
3. A tube mixer in accordance with claim 1 or claim 2, characterised in that at least one section has a structure (Q) which consists of a bundle of four chambered strands with mixing chambers (18) which each extend between two closed ends (14a, 14b) and which are arranged offset with respect to adjacent chambers in a longitudinal direction (11); and in that said structure (Q) in the built-in body (1) has a portion which preferably predominates.
4. A tube mixer in accordance with any one of claims 1 to 3, characterised in that at least one section (X) has a structure (8) with webs (81, 82) which are inclined with respect to the longitudinal direction (11), with adjacent webs being arranged with crossing alignments.
5. A tube. mixer in accordance with any one of claims 1 to 4, characterised in that a section (X) with inclined webs forms an entry region of the built-in body, with this entry region in particular being arranged after a cartridge (100a).
6. A tube mixer in accordance with any one of claims 1 to 5, characterised in that the cross-section is circular; and in that at least one section has a spiral structure (9), for example.
7. A tube mixer in accordance with any one of claims 1 to 6, characterised in that the sections have regular basic structures which are structurally modified at some positions.
8. A tube mixer in accordance with any one of claims 1 to 7, characterised in that the built-in body (1) forms a cohesive piece in whole or in part, wherein this piece includes a combination of at least two longitudinal sections and can preferably be produced by a casting process.
9. A tube mixer in accordance with any one of claims 1 to 8, characterised in that the built-in body (1) is made monolithic and is in particular injection moulded from a thermoplastic.
10. Use of a tube mixer in accordance with any one of claims 1 to 9 for the mixing of a high viscosity component (A) with at least one further component (B), wherein the further component (B) can have a viscosity smaller by a factor 10 to 1000 than the high viscosity component (A); wherein the mass flow of the further component (B) can be many times smaller than the mass flow of the high viscosity component (A); wherein the mixer is used in an apparatus (100) which includes a multi-chamber container (100a) or different containers for the separate reception of the components (A, B); and wherein the components are transported into the mixer by forcing them in with pistons or by means of pumps, in particular metering pumps.

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