EP3556457A1 - Continuous mixer and method - Google Patents

Abstract

The invention primarily relates to a continuous mixer (1) for mixing a medium of powdery material and a liquid, the continuous mixer (1) having a bulk material feed section (40), a metering section (41) and a mixing chamber (2) for mixing the powdery material and the liquid, wherein a shaft (43) runs through all three sections (2, 40, 41) and the shaft (43) is designed as a mixing shaft (3) with at least one mixing element (7) within the mixing space (2) wherein the mixing element (7) is formed from a holding element (4) and a mixing element (5) radially removable therefrom

Description

The invention relates to a continuous mixer for mixing a medium of bulk material, in particular a powdery bulk material, and a liquid, in particular water, with a mixing space for mixing the bulk material and the liquid, wherein a mixing shaft is disposed within the mixing space.

The invention also relates to a method for exchanging a mixing part of a continuous mixer, in particular in a continuous mixer according to the invention, as described and claimed herein.

Furthermore, the invention also relates to a series with at least two continuous mixers.

The invention also relates to a method for producing at least two mixing elements of different lengths.

Furthermore, the invention relates to a set of a holding part and / or a mixing part for a continuous mixer.

Continuous mixers of the type mentioned are already known and are usually used on construction sites for mixing dry mortar with water. Such continuous mixers generally have a mixing space which is designed as a wet zone in which the admixture of the liquid to the bulk material takes place.

For a particularly good mixing of a medium of bulk material and liquid, previously known continuous mixers in the mixing chamber have arranged mixing blades which protrude in the radial direction from a mixing shaft which can be driven by means of a drive unit.

In this case, a distinction is usually made between two different types of wings. For example, so-called propelling blades are known which transport the medium from an inlet region of the mixing chamber to an outlet region of the mixing chamber. So-called counter-thrust vanes have the property that they convey the medium in the opposite direction, ie from the outlet area in the direction of the inlet area. As a result, a particularly good mixing of the bulk material with the liquid is possible.

It is also known that the so-called mixing blades, which may be configured as propellant blades or push-pull blades, can be plugged onto the mixing shaft in the axial direction. These designed as a mixing blade mixing elements are generally integrally formed, which are attachable via a connecting profile on the shaft.

Here, however, there is the problem that during operation of the continuous mixer plugged onto the shaft Mixing elements due to the penetration of medium into the spaces between two, placed on the shaft mixing elements a so-called caking of the mixing blades on the shaft takes place. However, since the mixing elements of continuous mixers usually have a limited useful life, as they are worn due to the constantly prevailing friction, it may be necessary to deduct the mixing elements of the mixing shaft to replace them with new mixing elements. Due to the aforementioned caking, so for example curing of penetrated into the interstices mortar, it is often not possible or very difficult to separate the mixing elements again from the shaft, so that in case of wear or damage to a mixing element often entire shaft must be replaced.

It is therefore an object to provide a continuous mixer of the type mentioned, in which it is possible to exchange damaged or worn mixing elements easier.

A solution to this problem is achieved according to the invention by means of a continuous mixer with the features of claim 1. In particular, it is thus proposed to solve the above problem in a continuous mixer of the type mentioned above that the mixing shaft carries a projecting holding part, and that on the holding part, a mixing part is releasably secured. This has the advantage that a worn or damaged mixing part can be replaced more easily without the holding part required for its support having to be removed from the shaft.

It may be particularly advantageous if the mixing part of the holding part in the radial direction, in particular based on the mixing shaft is removable and / or attachable to this. Since during a mixing process, the largest forces acting on the mixing parts, transverse or perpendicular to this radial direction, a particularly simple, yet stable connection between the holding part and the mixing part can be achieved by this type of configuration.

Furthermore, the detachable connection between the holding part and the mixing part has the advantage that a configuration of the mixing parts can be changed more easily than before. In particular, a position and / or orientation of the mixing elements can thus be defined more simply and / or more flexibly.

Hereinafter, advantageous embodiments of the invention will be described, which can be combined individually or in combination with each other with the aforementioned features.

A variant may provide that the holding part and the mixing shaft are integrally formed. In this case, the position of the holding elements is already defined during the production of the mixing shaft. This embodiment has the advantage that it is particularly robust and durable.

According to an advantageous embodiment of the invention can be provided that the holding part and the mixing part form a mixing element. It may be particularly useful when the mixing element is attachable to the mixing shaft and / or removable from the mixing shaft. This has the advantage that a desired mixing configuration is freely adjustable by a user-defined arrangement and / or spacing of the holding parts on the mixing shaft. This has the advantage that the user the mixing shaft literally in a kind of modular system can configure according to his wishes, so as to be able to achieve a certain mixing result by means of the continuous mixer.

Alternatively or additionally, it may be provided that at least one mixing element designed as a driving element and at least one mixing element designed as a push-pull element is arranged in the mixing chamber of the continuous mixer. This makes it possible to ensure the longest possible whereabouts of the medium within the mixing chamber without the mixing chamber having to be lengthened in the axial direction. By means of the at least one push-driving element, the medium to be mixed can be transported again within the mixing space in the direction of the mixing chamber entrance, so that the medium as a whole remains longer in the mixing space during a mixing process.

As a result of the two-part design of the mixing elements described above, the holding parts can each be equipped with different mixing parts. Thus, in comparison with previously known continuous mixers, there is an additional possibility of influencing the adjustable mixing behavior of the continuous mixer. In one embodiment of the invention, therefore, the mixing part can be designed as a mixing blade and / or mixing hook and / or mixing claw. Therefore, the user can choose which of the above-mentioned mixing parts or which combination of mixing parts he would like to combine, depending on the application, with the holding part or the holding parts, which is always designed identically.

In order to provide a particularly stable and thus hardly maintenance-requiring connection between the holding part and the mixing shaft, based on which a custom arrangement of the holding parts on the mixing shaft is possible, according to an embodiment of the invention, the holding part with a holding part formed on the holding profile axially on the mixing shaft can be plugged formed. An inner contour of the holding profile can be adapted to an outer contour of the mixing shaft, so that a torque transmission from the mixing shaft to the holding part and / or the patch on the holding part mixing part is possible.

In order to form a torsion-proof connection between the holding part and the mixing shaft, it may be advantageous if the inner contour of the holding profile and / or the outer contour of the mixing shaft has / have a non-circular and / or at least partially angular cross-sectional contour.

So that an efficient power transmission is also possible from the holding part to the mixing part, the holding part can have a pin and the mixing part can have a pin receptacle corresponding to the pin, whereby a mechanical interface is formed. The pin can stabilize the mixing part and increase its rigidity in order to achieve a better mixing of the medium by means of the mixing part can. Furthermore, a particularly stable connection between the pin and pin receptacle is possible because the pin is inserted into the pin receptacle and thus a relatively large-area concerns between holding part and mixing part can be achieved. The pin and / or the pin receptacle can / together with a cross-sectional plane, in particular with respect to the mixing shaft, include a particular acute angle. In the direction of rotation of the mixing shaft, driving elements may be aligned in the direction of an outlet section of the mixing chamber and / or push-pull elements in the direction of an inlet section of the mixing chamber.

In order to facilitate the removal of the mixing part from the holding part after use of the continuous mixer, it may be provided that the pin and / or the pin receptacle have a particular radially extending slope. It may be particularly advantageous if the pin and / or the pin receiving a slope of a maximum of 1.5 degrees per side. Here is the advantage that the best possible power absorption over the resulting contact surface on the holding part can be achieved. In addition, in the production, in particular by injection molding, demolding due to the formed slope easier.

It may be advantageous if a rotationally secure attachment of the mixing part is set up on the holding part. This can be achieved, for example, by virtue of the fact that the pin and / or the pin receptacle have an asymmetrical cross section, preferably wherein the cross section of the pin and / or the pin receptacle transversely or perpendicular to a flow direction of the medium to be mixed, in particular within the mixing chamber, and / or decreases contrary to a direction of immersion of the mixing part. A correct orientation when plugging can thus be ensured. At the same time, the holding part thus has a relatively large contact surface, via which a frictional force can be generated with an outer surface of the peg receiving thereon, in order to hold the mixing part on the holding part by this frictional force.

Alternatively or additionally, a particular radially extending notch and / or in the pin receiving a corresponding accumulation of material may be formed on the pin, wherein the outer surfaces of the accumulation of material in the attached state at least partially abut the outer surfaces of the notch. By this type of embodiment, the mating surfaces of the pin and the pin receptacle are increased in order to increase the resulting frictional force between the surfaces.

In order to be able to prevent that mixing parts are plugged onto non-compatible holding parts, one or the aforementioned mechanical interface can be designed as a key-lock interface. Preferably, so that holding parts of driving elements and mixing parts of Gegentreibelementen and / or mixing parts of driving elements and holding parts of Gegentreibelementen are designed to be incompatible with each other, so that they are not connected to each other.

In a further embodiment of the invention, the holding part and the mixing part may each have a channel, wherein the two channels form a fixing channel in the use position, in which a fixing means of the continuous mixer, for example in the form of a retaining pin, is insertable, so that the mixing part on the holding part fixable is. The guide channel can in particular at least partially by one or the previously mentioned mixing element and / or obliquely to an outer surface of the mixing part and / or parallel to the mixing shaft, extending. The fixing means may comprise a head part, by means of which the fixing means is easier to insert into the fixing channel, in particular einpressbar. The head part may have a wider cross section than a pin portion.

So that the head part terminates flush with the surface of the mixing part, it may be advantageous if the head part is inclined relative to a longitudinal axis of the fixing means and / or parallel to the outer surface of the mixing part can be arranged.

So that a faulty insertion of the fixing means in the fixing channel can be avoided, at least the head part can have a non-circular cross-section.

In order to allow an even better fixation of the fixative in the fixation channel, a locking connection can be formed by the fixing means and the mixing part in the inserted state. For this purpose, the fixing means, preferably at its distal end, have a cross-sectional thickening, which cooperates with a, preferably formed as a groove, recess on the inside of the fixation channel to prevent falling out of the fixing means. The cross-sectional thickening snaps into the recess in the inserted state of the fixing means.

In order to be able to better avoid pushing out of the fixing means from the fixing channel during a mixing operation, it may be advantageous if the head part is arranged in the inserted state on the outside of the mixing part, on which a greater pressure is exerted by the medium during the mixing process. In the case of driving elements, this is the direction in the direction of the outlet, and in the case of push-pull elements, this is the outside which is oriented in the direction of an inlet region of the mixing chamber.

In one embodiment of the invention, one or the aforementioned mechanical interface of one or the above-mentioned driving element structurally different, in particular mirror image, to one or the mechanical interface of one or the aforementioned Gegentreibelements be configured. Thus, can prevents accidentally driving elements and / or Gegentreibelemente are arranged at not intended positions on the mixing shaft.

Alternatively or additionally, it may be advantageous if a rotationally secure fitting of the mixing part is ensured by the mechanical interface on the holding part, preferably in which the mechanical interface defines a slip orientation of the mixing part relative to the holding part, in particular so that a plugging by 180 ° is not twisted is possible.

The mixing space of the continuous mixer can be divided into a mixing area and a stripping area, wherein the mixing elements are arranged in the mixing area. In this mixing area, the mixing shaft and the mixing parts attached thereto are immersed completely in the medium during a mixing of the medium, in particular at a maximum filling of the mixing space. The stripping region corresponds to an outlet region in which the mixed medium is transported out of the continuous mixer, in particular runs out.

To be able to better avoid that medium enters intermediate spaces between two mixing elements plugged onto the mixing shaft, a circumferential, in particular annular, sealing element can be formed on at least one end face of one or the aforementioned holding profile of the holding part. It may be particularly useful when the sealing element is monolithic and / or integral with the retaining profile. As a result, the number of parts can be reduced and yet a good sealing of the gaps can be achieved. In assembly position, the sealing element is thus located on an end face of an adjacent Holding profile and seals the gap between the mixing elements.

As previously mentioned, mixed media such as mortar may harden and cause a kind of caking such that the mixing elements are stuck on the mixing shaft. In order to be able to remove a mixing part after use of the continuous mixer easier from the holding part, the mixing part may be made of a softer material than the holding part. It has been found to be particularly useful when the mixing part of a plastic, preferably made of polyurethane. By deforming and / or bending the mixing part, chipping of hardened medium can be achieved, whereby loosening of the mixing part from the holding part is easier. In particular, plastics, such as polyurethane, are also sufficiently robust, so that its wear is low and the mixing elements are thus relatively durable.

Alternatively or additionally, the mixing part can have a dividing element arranged on an immersion side of the mixing part, as a result of which even better mixing of the medium can be achieved. It may be particularly expedient if the dividing element is arranged parallel to the mixing shaft. This allows, for example, a simpler demolding of the preferably formed as a casting mixing part.

The invention further relates to a method for exchanging a mixing part of a continuous mixer, in particular in a continuous mixer as described and claimed herein, wherein the mixing part is released from the holding part and the mixing part then, preferably in the radial direction relative to a mixing shaft of the continuous mixer, from the holding part is deducted, in particular without previously the holding part is removed from the mixing shaft, in which case a replacement mixing part is placed and fixed on the original holding part.

The invention also relates to a series with at least two continuous mixers, in particular continuous mixers in the manner as described and claimed herein, wherein the flow mixers have mixing parts with neck portions of different lengths and / or different long holding parts. In particular, the length of the holding parts is adapted to the length of the mixing parts, so that an optimal power transmission can be achieved.

Furthermore, the invention relates to a method for producing at least two differently long holding parts and / or mixing elements, in particular a continuous mixer in the manner as described and claimed herein, wherein for producing the different length mixing parts the same base mold is used, wherein for the production a longer mixing part an extension of a neck portion of the mixing part causing intermediate casting mold is used. Thus, the different mixing parts of the continuous mixers of the aforementioned series can be produced by means of the same base casting mold, which reduces the costs of production.

The invention also relates to a set of a holding part and / or a mixing part for a continuous mixer, in particular in a manner as described and claimed herein, wherein one or the previously mentioned mixing part with one or the previously mentioned holding part is detachably connectable.

In addition, the invention relates to the use of a continuous mixer, as described and claimed thereof, for the production of dry mortar and water mortar.

The invention will now be described in detail with reference to an embodiment, but is not limited to this embodiment. Further exemplary embodiments result from the combination of the features of one or more protection claims with one another and / or with one or more features of the exemplary embodiment.

Fig. 1

eine Gesamtübersicht einer Ausführungsvariante eines erfindungsgemäßen Durchlaufmischers in längsgeschnittener Seitenansicht,

Fig. 2

eine perspektivische Gesamtdarstellung des in Fig. 1 gezeigten Durchlaufmischers,

Fig. 3

eine Mischwelle mit zum Teil von den dazu korrespondierenden Halteteilen abgenommenen Mischteilen in perspektivischer Darstellung,

Fig. 4

die Mischwelle aus Fig. 3 mit daran befestigten Halteteilen und auf den Halteteilen befestigten Mischteilen in perspektivischer Darstellung,

Fig. 5

mehrere Ansichten eines aus Mischteil und Halteteil teils zusammengesetzten Mischelements mit kürzer ausgestalteter Mischteil- und Zapfenausbildung,

Fig. 6

zwei perspektivische Darstellungen eines Halteteils mit kürzer ausgestalteter Zapfenausbildung,

Fig. 7

eine Mischwelle mit zum Teil von den dazu korrespondierenden Halteteilen abgenommenen Mischteilen in perspektivischer Darstellung,

Fig. 8

die Mischwelle aus Fig. 7 mit daran befestigten Halteteilen und auf den Halteteilen befestigten Mischteilen in perspektivischer Darstellung,

Fig. 9

mehrere Ansichten eines aus Mischteil und Halteteil teils zusammengesetzten Mischelements mit länger ausgestalteter Mischteil- und Zapfenausbildung,

Fig. 10

zwei perspektivische Darstellungen eines Halteteils mit länger ausgestalteter Zapfenausbildung.

It shows:

Fig. 1

an overall view of an embodiment of a continuous mixer according to the invention in a longitudinal sectional side view,

Fig. 2

an overall perspective view of the in Fig. 1 shown continuous mixer,

Fig. 3

a mixing shaft with partially removed from the corresponding holding parts mixing parts in perspective view,

Fig. 4

off the mixing shaft Fig. 3 with attached holding parts and mounted on the holding parts mixing parts in perspective view,

Fig. 5

several views of a mixing part and holding part partly assembled mixing element with shorter designed Mischteil- and journal education,

Fig. 6

two perspective views of a holding part with a shorter pin configuration,

Fig. 7

a mixing shaft with partially removed from the corresponding holding parts mixing parts in perspective view,

Fig. 8

off the mixing shaft Fig. 7 with attached holding parts and mounted on the holding parts mixing parts in perspective view,

Fig. 9

several views of a mixing part and holding part partly assembled mixing element with longer designed Mischteil- and journal education,

Fig. 10

two perspective views of a holding part with a longer designed pin training.

In the Fig. 1 and 2 Two overall views of a continuous mixer for mixing a powdered substance with water are shown, wherein the continuous mixer as a whole is designated as 1. The powdery substance may be, for example, a bulk material such as dry mortar.

The continuous mixer 1 is subdivided into a bulk material supply section 40, a metering section 41 and a mixing chamber 2. A shaft 43 which can be driven by a motor via a drive 42 extends in the axial direction through all three regions of the continuous mixer 1 mentioned above. In the bulk material supply section 40 and in the metering section 41, the shaft 43 is designed in each case as a screw conveyor 44. The bulk material can be introduced via a bulk material inlet opening 45 into the bulk material supply section 40 and can be transported from there by means of the transport screw 44 to the metering section 41. In these sections, the bulk material is in a dry state. About the metering 41 can the bulk material finally be transported into the mixing chamber 2.

In the mixing chamber 2, which is designed as a wet zone, water and / or another liquid can be introduced into the mixing chamber via a liquid inlet opening 46.

The mixing chamber 2 is subdivided into an active mixing region 33, in which the bulk material and the liquid are mixed with one another, and a stripping region 34, with an outlet 48. The mixed medium of bulk material and water can be output via the stripping region 34 through the outlet 48.

The shaft 43 is designed as a mixing shaft 3 within the mixing chamber 2. The mixing shaft 3 carries a plurality, preferably differently oriented projecting holding parts 4, on each of which a mixing part 5 is detachably fastened. The mixing part 5 can be withdrawn from the holding part 4, preferably in the radial direction 6. This has the advantage that a worn or damaged mixing part 5 is designed interchangeable for the first time, wherein the holding part 4 remains on the mixing shaft 3. As a result, both the time and the material costs in the repair of a continuous mixer 1 can be reduced.

In the mounted state of the mixing part 5 on the holding part 4, ie the use position, while a stable connection between holding part 4 and mixing part 5 is possible because a large part of the force acting on the mixing part 5 during a mixing force transverse or perpendicular to the radial slip direction.

It may be advantageous if the mixing shaft 3 and the thereof protruding holding part 4 are integrally and / or monolithically designed. Thus, the holding part 4 and the mixing shaft 3 are particularly durable formed.

However, if the respective position of the holding part 4 or of the mixing part 5 should be freely fixable by a user, it is advantageous if the holding part 4 and the mixing part 5 can be assembled to form a mixing element 7, wherein the mixing element 7 at the desired position on the mixing shaft 3 can be plugged by the user. The orientation and / or position of the respective mixing element 7 on the mixing shaft 3 can therefore be chosen flexibly.

The mixing parts 5, in the Fig. 3 to 10 are each designed as a mixing wing. As described above in the general description, however, other embodiments of the mixing part 5 are possible, which are not exhaustively enumerated herein.

On the mixing shaft 3 of the continuous mixer 1, which in the Fig. 1 . 3 and 4 7 to 8, a plurality of mixing elements 7 designed as driving elements 8 and several push-pull elements 9 are plugged on. The order of the drive elements 8 and / or push-pull elements 9 can be freely determined by the user. This has the advantage that mixing properties of the continuous mixer 1 can be set to the respective field of application.

As a driving element 8 mixing elements 7 are referred to transport the medium from the inlet region of the mixing chamber 2 to the outlet 48, and Gegentreibelemente 9 referred to as such mixing elements 7, which transport the medium in the opposite direction. The Gegentreibelemente 9 therefore allow during a mixing process an extension of the Residence time of the medium in the mixing chamber 2.

The holding parts 4 each have a holding profile 11, via which the respective holding part 4 can be plugged onto the mixing shaft 3 in the axial direction. An inner contour 12 of the retaining profile 11 is adapted to an outer contour 13 of the mixing shaft 3, so that a torque transmission from the mixing shaft 3 to the holding part 4 and / or the attached to the holding part 4 mixing part 5 is possible. As in the Fig. 5, 6 . 9 and 10 can be seen, the inner contour 12 of the holding profile 11 and / or the outer contour 13 of the mixing shaft 3 out of round and in cross-section at least partially angular, in particular at least partially square.

In order to be able to detachably place the mixing part 5 on the holding part 4, the holding part 4 has a pin 14 and the mixing part 5 has a pin receptacle 15 corresponding to the pin 14. As a result, a mechanical interface 15 is formed between the holding part 4 and the mixing part 5.

The pin 14 and / or the pin receptacle 15 have a radially extending slope. This allows a simpler placement of the mixing part 5 on the holding part 4. In addition, the aforementioned slope of improved demolding of preferably designed as a casting mixing part 5 serves here. For example, a draft angle of 1.5 degrees per side can be provided. This may be an advantage if the Entformungsschräge is formed as low as possible in order to achieve the best possible power through a contact surface of the pin 14, which comes into contact with a lying in the pin receiving surface 15 of the mixing part 5 in the mounted state , It may be particularly advantageous if the Bevel of the pin 14 in the circumferential direction with respect to the mixing shaft 3 is formed larger than a position of the slope in the axial direction. It can further be provided that the pin 14 extends within the pin receptacle 15 over a maximum of 2/3 of the total length of the mixing part 5. The aforementioned draft angle may refer to a deviation with respect to a radial direction with respect to the mixing shaft 3.

In order to avoid a faulty placement of a mixing part 5 on a non-associated holding part 4, the pin 14 and / or the associated pin receptacle 15 has a non-circular and / or asymmetrical cross-section. The cross section of the pin 14 and / or the pin receptacle 15 decreases transversely or perpendicular to a flow direction 17 of the medium to be mixed. In order to increase the surfaces of the journal 14 and the journal receptacle 15 in contact with the mixing part 5, the journal 14 has a notch 18 and the journal receptacle 15 has a material accumulation 19 corresponding thereto. The outer surfaces of the accumulation of material 21 are in the mounted state on the outer surfaces 20 of the notch at least partially.

To be able to prevent even better that a connection can be made between non-matching mixing parts 5 and holding parts 4, the mechanical interface 16 between the two parts 4, 5 is designed as a key-lock interface. This can be achieved, for example, in that holding parts 4 of driving elements 8 and mixing parts 5 of push-pull elements 9 are designed to be incompatible with one another. The same applies to mixing parts 5 of driving elements 8 and holding parts 4 of push-pull elements 9, which are likewise designed to be incompatible with one another can. It is also conceivable that the pin 14 has an S-shaped cross section and the pin receptacle 15 has a corresponding shape. However, other forms are conceivable, which are not exhaustively enumerated herein.

In order to avoid unintentional removal of the mixing part 5 from the holding part 4 during use of the continuous mixer 1, the holding parts 4 and the mixing parts 5 each have a channel 22, 23, which form a continuous fixing channel 24 in the mounted state. In the fixing channel 24, a fixing means 26 can be inserted, so that the mixing part 5 on the holding part 4 is fixable. The fixing channel 24 extends obliquely to an outer surface 25 of the mixing part 5 and / or parallel to the mixing shaft 3. Thus, a particularly cost-effective production of the mixing part 3 is possible because a particularly simple demolding possible and no reworking is required.

The fixing means 26 may be formed, for example, as a retaining pin 27. The fixing means 26 has an obliquely to a longitudinal axis 28 of the fixing means 26 provided head portion 29. The head portion 29 preferably has a non-circular cross-section to further facilitate proper insertion for the user. The head part 29 can form together with an outer surface 25 of the mixing part 5 a closed, in particular flat mixing surface.

In order to achieve a better fixation of the fixation means 26 in the fixation channel 24, a catch connection can be formed by the fixation means 26 and the mixing part 5 and / or the holding part 4. At a distal end 30 of the fixing means 26, for example a cross-sectional thickening 31 may be formed, which can be latched into a preferably formed as a groove recess 32 on an inner side of the fixing channel 24 and so even more slipping out of the fixing means 26 from the fixing channel 24 prevented. The head part 29 is arranged in the inserted state on the outside 25 of the mixing part 5, on which there is a greater pressure exerted by the medium to be mixed during a mixing operation.

The mechanical interface 16 of the drive element 8 is structurally different, for example mirror-inverted, to the mechanical interface 16 of the push-pull element 9. This has the advantage that a rotationally secure attachment of the mixing part 5 is ensured on the holding part 4 and also a faulty coupling between mating holding parts 4 and mixing parts 5 is prevented.

In the aforementioned stripping region 34 of the mixing chamber 2, a scraper 47 may be arranged, which ensures that no medium in the end region of the mixing chamber 2 sets and the medium is transported via the outlet 48 from the continuous mixer 1.

Since the mixing elements 7 can be plugged onto the mixing shaft 3 in a manner similar to a box, it can lead to the medium having penetrated into the intermediate gaps between the individual mixing elements 7 after use of the continuous mixer 1 and hardened. To better prevent this, the retaining profile 11 of the holding part 4 on at least one side on a circumferential, in particular annular sealing element 36. The sealing element 36 acts in the plugged state on the mixing shaft 3 with the on this sealing element 36th adjacent end faces 35 adjacent holding parts 4 together and seals the intermediate gap between the holding parts 4. It may be particularly expedient if the sealing element 36 is formed monolithically and / or in one piece with the retaining profile 11. The sealing element 36 may be configured for example as an annular shoulder.

The mixing part 5 can be produced as a cast part and preferably consists of a softer material than the holding part 4. Particularly suitable for this purpose are, for example, plastics, in particular polyurethane. This has the advantage that fixed and hardened medium can be removed by bending and / or deforming the mixing part 5 at the mixing part 5. Also in the pin receptacle 15 penetrated medium can thus be easily solved by the mixing part 5, so that the mixing part 5 is again removable from the holding part 4.

In order to be able to achieve even better mixing of the medium to be mixed, the mixing part has a dividing element 38 arranged on an immersion side 37 of the mixing part. The dividing element 38 is arranged parallel to the mixing shaft 3. This has particular advantages in the demolding of the mixing part, since a simpler removal of the mixing part from its mold is possible and post-processing of the mixing part 5 is thus eliminated.

The invention also relates to a series with at least two continuous mixers 1 of the above-mentioned type, wherein the continuous mixer 1 mixing parts 5 have different lengths of neck 39 between the head portions 49 and the foot areas 50, such as in the FIGS. 5 and 6 in comparison to the FIGS. 9 and 10 can be seen. The production of the longer neck regions 39 is combined, for example, by the use of an intermediate casting mold with the same parent mold, which is also used for the production of the short mixing parts 5, possible. Thus, the head portions 49 are configured identical to each other in the different mixing parts 5. The same applies to the foot areas 50. Preferably, the production is carried out by an injection molding process.

The invention thus relates primarily to a continuous mixer 1 for mixing a medium of pulverulent material and a liquid, wherein the continuous mixer 1 a Schüttgutzufuhrabschnitt 40, a metering 41 and a mixing chamber 2 for mixing the powdery material and the liquid, wherein a shaft 43rd extends through all three sections 2, 40, 41 and the shaft 43 is configured within the mixing chamber 2 as a mixing shaft 3 with at least one mixing element 7, wherein the mixing element 7 is formed from a holding element 4 and a mixing element 5 radially removable therefrom.

LIST OF REFERENCE NUMBERS

1

Continuous mixer

2

mixing room

3

mixing shaft

4

holding part

5

mixing section

6

radial direction

7

mixing element

8th

driving element

9

Against driving element

10

mixing blades

11

retaining profile

12

Inner contour of the retaining profile

13

Outer contour of the mixing shaft

14

spigot

15

pin receiver

16

mechanical interface

17

flow direction

18

score

19

material accumulation

20

Outside surface of the notch

21

External surface of material accumulation

22

Channel of the mixing part

23

Channel of the holding part

24

fixing channel

25

Outer surface of the mixing part

26

fixative

27

retaining pin

28

Longitudinal axis of the fixative

29

headboard

30

distal end of the fixative

31

Cross-sectional enlargement

32

recess

33

mixing area

34

Stripping

35

Front side of the holding part

36

sealing element

37

Immersion side of the mixing part

38

Zerteilungselement

39

neck

40

Bulk supply section

41

metering

42

drive

43

wave

44

screw conveyor

45

Bulk material inlet opening

46

Liquid inlet port

47

scraper

48

outlet

49

head area

50

footer

Claims (13)

Continuous mixer (1) for mixing a medium of bulk material, in particular a powdery bulk material, and a liquid, in particular water, with a mixing chamber (2) for mixing the bulk material and the liquid, wherein within the mixing chamber (2) a mixing shaft (3) characterized in that the mixing shaft (3) carries a projecting holding part (4), and that on the holding part (4), a mixing part (5) is releasably secured, in particular wherein the mixing part (5) from the holding part (4) in radial Direction is deductible. Continuous mixer (1) according to claim 1, characterized in that the holding part (4) and the mixing part (5) form a mixing element (7), in particular wherein the mixing element (7) can be plugged onto the mixing shaft (3), and / or at least one mixing element (7) designed as a driving element (8) and / or at least one push-pull element (9) is arranged in the mixing chamber (2) of the continuous mixer (1) and / or that the mixing part (5) is designed as a mixing blade (10) and / or mixing hook and / or mixing claw is formed. Continuous mixer (1) according to claim 1 or 2, characterized in that the holding part (4) with a holding part (4) formed holding profile (11) axially on the mixing shaft (3) can be plugged, wherein an inner contour (12) of the holding profile ( 11) is adapted to an outer contour (13) of the mixing shaft, so that a torque transmission from the mixing shaft (3) on the holding part (4) and / or the mixing part (5) is possible, preferably wherein the inner contour (12) of the Holding profile (11) and the outer contour (13) of the mixing shaft (3) have a non-circular and / or at least partially polygonal cross-sectional contour, preferably the same design. Continuous mixer (1) according to one of the preceding claims, characterized in that the holding part (4) has a pin (14) and the mixing part (5) has a pin receptacle (15) corresponding to the pin (14), whereby a mechanical interface (16) is provided. is formed, in particular wherein the pin (14) and / or the pin receptacle (15) has a, in particular radially extending, bevel and / or wherein the pin (14) and / or the pin receptacle (15) have an asymmetrical cross-section, preferably the cross section of the pin (14) and / or the pin receptacle (15) decreases transversely or perpendicularly to a flow direction (17) of the medium to be mixed and / or that on the pin (14) has a particular radially extending notch (18) and in the pin receiving (15) a corresponding accumulation of material (19) is formed, wherein the outer surfaces (21) of the material accumulation (19) in the mounted state on the outer surfaces (20) of the notch (18) at least partially abut against and / or that the mechanical interface (16) is designed as a key-lock interface, preferably so that holding parts (4) of driving elements (8) and mixing parts (5) of Gegentreibelementen (9) and / or mixing parts (5) of drive elements (8) and holding parts (4) of Gegentreibelementen (9) are formed incompatible with each other. Continuous mixer (1) according to one of the preceding claims, characterized in that the holding part (4) and the mixing part (5) each have a channel (22, 23), wherein the two channels (22, 23) in the attached state one, in particular at least partially by one or the mixing element (7) and / or obliquely to a Form outside surface (25) of the mixing part (5) and / or parallel to the mixing shaft (3), fixing channel (24) in which a fixing means (26) of the continuous mixer (1), in particular in the form of a retaining pin (27), is insertable in that the mixing part (5) can be fixed to the holding part (4), in particular wherein the fixing means (26) is inclined, preferably parallel to the outer surface (25) of the fixing means (26), preferably relative to a longitudinal axis (28) The fixing means (26) preferably at its distal end (30) has a cross-sectional thickening (31) which with a preferably formed as a groove recess (31) can be arranged on the mixing part (5), head part (29), in particular with non-circular cross-section. 32 ) cooperates on the inside of the fixing channel (24) in order to prevent the fixing means (26) from falling out and / or that the head part (29) in the inserted state is arranged on the outside (25) of the mixing part (5) on which a mixing process, a pressure is applied through the medium. Continuous mixer (1) according to one of the preceding claims, characterized in that one or the mechanical interface (16) of one or the driving element (8) structurally different, in particular mirror image, to one or the mechanical interface (16) of one or the Gegentreibelements (9 ) and / or that by the mechanical Interface (16) a rotationally secure fitting of the mixing part (5) on the holding part (4) is ensured, preferably by the mechanical interface (16) defines a slip orientation of the mixing part (5) relative to the holding part (4). Continuous mixer (1) according to one of the preceding claims, characterized in that the mixing space (2) of the continuous mixer (1) is subdivided into a mixing area (33) and a stripping area (34), the mixing elements (7) being in the mixing area (33). are arranged. Continuous mixer (1) according to one of the preceding claims, characterized in that on at least one end face (35) of one or more of the holding profile (11) of the holding part (4) a circumferential, in particular annular, sealing element (36) is formed, preferably wherein the sealing element (36) monolithically and / or integrally with the holding profile (11) is formed. Continuous mixer (1) according to one of the preceding claims, characterized in that the mixing part (5) made of a softer material, in particular plastic, preferably polyurethane, as the holding part (4) is prepared and / or that the mixing part (5) on a Submersion side (37) of the mixing part (5) arranged dividing element (38), preferably wherein the dividing element (38) is arranged parallel to the mixing shaft (3). Method for replacing a mixing part (5) of a continuous mixer (1), in particular in a continuous mixer (1) according to one of claims 1 to 9, wherein the mixing part (5) from a holding part (4) is released and the mixing part (5) then, preferably in the radial direction relative to a mixing shaft (3) of the continuous mixer (1), is withdrawn from the holding part (4), in particular without previously the holding part (4) is removed from the mixing shaft (3), in which case a replacement mixing part (5) is placed and fixed on the original holding part (4). Series with at least two continuous mixers (1), in particular according to one of claims 1 to 9, wherein the continuous mixers (1) have mixing parts (5) with neck portions (39) of different lengths, in particular wherein the respective head regions and / or foot regions are made identical to one another , Method for producing at least two holding parts (4) of different length and / or mixing elements (7), in particular a continuous mixer (1) according to one of claims 1 to 9 and / or the series according to claim 11, wherein for producing the different length mixing parts (5) the same basic casting mold is used, wherein an intermediate mold which produces an extension of a neck region (39) of the mixing part (5) is used to produce a longer mixing part (5). Set of a holding part (4) and / or a mixing part (5) for a continuous mixer (1), in particular for a continuous mixer (1) according to one of claims 1 to 9, wherein one or the mixing part (5) with one or the holding part (4) is releasably connectable.

Images