DE202016000169U1 - Pumping and / or mixing device for conveying, homogenizing and / or dispersing flowable products - Google Patents

Abstract

Pumping and / or mixing device for conveying, homogenizing and / or dispersing flowable products, having a rotatably mounted about a first axis of rotation first rotor element (32, 32 ', 32' '), which by means of a drive means (20) is driven, and a about a second axis of rotation rotatably mounted second rotor element (34, 34 ', 34' ') which by means of a drive means (22) can be driven, characterized in that the first rotor element (32, 32', 32 '') and the second rotor element (34, 34 ', 34' '), relative to their axes of rotation, have an axial offset from one another.

Description

The invention relates to a pumping and / or mixing device for conveying, homogenizing and / or dispersing flowable products, having a rotatably mounted about a first axis of rotation first rotor element which is drivable by means of a drive means, and a rotatably mounted about a second axis of rotation second Rotor element which is drivable by means of a drive device. Furthermore, the invention also relates to an apparatus for homogenizing and / or dispersing flowable products of all types and forms, such as. As liquids, powders or solid-liquid mixtures, with at least one container for receiving such a product.

In the cosmetic, pharmaceutical or chemical industry a variety of different liquid, pasty or solid materials are mixed with each other or with each other to produce especially flowable products, such as creams, ointments or pastes. The mixtures produced from the most varied starting materials and frequently present as emulsions or dispersions sometimes already form a finished, salable end product. Under certain circumstances, these mixtures are also used as starting material for possible further processing. In order to be able to produce mixtures of substances which are frequently present in the form of an emulsion or dispersion, devices are used for homogenizing and / or dispersing preferably flowable products with which, as a rule, a preferably homogeneous substance mixture is to be produced from the starting materials to be mixed with one another. The mixtures produced can also be in the form of a powder phase, which is added to a binder only later.

Pumping and / or mixing devices of the aforementioned type are used, for example, in devices for homogenizing and / or dispersing flowable products, which have a closed container, such as an agitator container. In the container, the various solid, flowable or liquid starting materials are entered and processed by means of, for example, an arranged inside the container agitator to a product having a preferably homogeneous structure. Out DE 299 17 365 U1 For example, such a device for homogenizing a flowable product is known, which has a container with an arranged inside the container agitator. In addition to the agitator in the container interior, a pumping and / or mixing device is connected to the container. Shear forces are also applied to the product conveyed by the pumping and / or mixing device with the aid of this pumping and / or mixing device. In addition, a uniform distribution of the starting materials used to form the product is achieved in the mixture to be produced. In the DE 299 17 365 U1 described pump mixer has a rotor / stator assembly for homogenizing / dispersing the product.

Out EP 1 125 625 B1 Furthermore, a homogenizer for homogenizing flowable substances is known, which has a container with a homogenizer connected to the container. The homogenizer comprises two rotors which can be driven by means of a drive device and which are each independently drivable. The disclosed rotor / rotor arrangement allows the same direction or opposite movement of the rotors. In this case, the known rotor / stator assemblies and rotor / rotor assemblies each contactless intermeshing component sections, whereby the shear stress is increased to the product that flows through such an arrangement. Rotor / rotor or rotor / stator thus have component sections lying on a plane extending approximately perpendicular to its axis of rotation. The incorporation of a powdered additive in a liquid phase or the mixing of different powdery starting materials within a pure powder phase can not be implemented with such a pumping and / or mixing device.

The invention is thus based on the object of specifying a pumping and / or mixing device of the type mentioned, which is improved and / or with a powdered substance can be mixed in simplified and improved homogeneity in the mixture even in preferably purely powdery phases to simple Way is achievable.

The invention solves its underlying object in a pumping and / or mixing device for conveying, homogenizing and / or dispersing flowable products of the type described by the first rotor element and the second rotor element, based on their axes of rotation, have an axial offset from one another ,

The invention is based on the finding that with the help of two relatively movable rotor elements, which are arranged in the axial direction at a distance from each other, the mixing of a powdered substance into a flowable product or the homogeneity of a purely powdery phase during the homogenization or dispersion to simplified Way can be improved. By preferably in the axial direction between the Rotor elements resulting distance is formed at least one gap between the rotor elements. With such preferably in a plane between the axially spaced-apart rotor elements extending gap, also referred to as shear gap, preferably a purely pulverulent mixture can be further broken up in an advantageous manner. An axial offset of the rotor elements relative to one another or an axial spacing of the rotor elements is to be understood here as meaning that the two rotor elements of the pumping and / or mixing device according to the invention are arranged on different planes with respect to their axes of rotation and thus regions or sections of the rotor elements are not mesh. Thus, there is a plane between the rotor elements which is free of possible components or structural parts of the rotor elements.

Due to the axial offset, different shear states can be realized.

A preferred embodiment of the invention provides that the axes of rotation of the first and second rotor element are substantially parallel to each other, preferably coaxially. The coaxial arrangement of the axes of rotation preferably provides an advantageously congruent alignment or arrangement of the first and second rotor elements with respect to one another. This results in a comparative shear stress of at least by means of the inventive pumping and / or mixing device moving flowable product over preferably the entire circumference of the two rotors. In addition, a compact and thus space-saving arrangement of the first and second rotor element is effected. Preferably, the axes of rotation in the vertical and substantially perpendicular to a horizontal plane as a footprint for the pumping and / or mixing device Preferably, the first rotor element with a first drive shaft and the second rotor element are coupled to a second drive shaft, which are drivable by means of different drive means , wherein preferably one of the drive shafts is designed as a hollow shaft. The provision of respective separate drive shafts for driving the first and second rotor elements, which are preferably rotationally coupled to a first and a second drive means, ensures an independent drive of the first rotor element relative to the second rotor element. Preferably, the first and second rotor element in the same direction, ie the same direction of rotation, or in opposite directions, ie having different directions of rotation, are driven. In addition, an individual adaptation of the rotational speeds of the first and second rotor element is possible. The formation of a drive shaft as a hollow shaft also has the advantage that both rotor elements are mechanically driven with respect to their axes of rotation from one side. Thus, the compactness of the pumping and / or mixing device according to the invention is further improved.

According to a preferred embodiment of the pumping and / or mixing device according to the invention, the axial offset between the first and the second rotor element is variable. The distance is preferably adjustable in the longitudinal direction of the axes of rotation, whereby, in one embodiment of the invention, the gap, in particular the shearing gap, between the first and second rotor element can be tailored individually to the flowable product to be processed. Depending on the given viscosity of the flowable product to be mixed or conveyed, the distance between the first and second rotor element is increased or decreased. To change the axial offset between the first and second rotor element, the position of at least one of the rotor elements is changed on a correspondingly assigned drive shaft.

This is achieved for example by means of different length spacers, by means of which the position of the first rotor element can be changed to the associated drive shaft. In an alternative embodiment, one of the first and second drive shaft is displaced relative to the respective other drive shaft in the axial direction with the respective first or second rotor element fixedly arranged thereon in the axial direction. The first or second drive shaft is preferably coupled to a corresponding axial adjustment unit.

Preferably, the first rotor element is designed as an axial pumping wheel and / or the second rotor element as a radial pumping wheel. In one embodiment of the present invention, the first rotor element is used to convey the flowable product in the longitudinal direction of the rotor axis of the first rotor element. Alternatively or optionally, the second rotor element is designed as a radial pumping wheel. With the help of the radial pumping wheel is a deflection in the direction of movement of the flowable product by about an angle of 90 degrees. The flowable product, which is preferably sucked parallel to the axis of rotation of the second rotor element, is deflected by means of the radial pumping wheel, so that it is discharged or discharged essentially uniformly over the circumference of the rotating second rotor element in an approximately radial direction relative to its axis of rotation. Preferably, in the inventive design of the pumping and / or mixing device with an axial pumping wheel and a radial pumping wheel, the distance or offset between the first and second rotor element chosen such that it corresponds to at least about one fifth of the diameter of the first or second rotor element.

Preferably, the first rotor element has a plurality of substantially radially projecting to the axis of rotation conveying wings, which are adapted to preferably cause a first conveying movement of the product in the direction of the second rotor element. The first rotor element has in particular three, four, five or more conveying wings, which preferably run radially to the axis of rotation of the first rotor element. There is a conveying movement of the product to be homogenized / dispersed flowable product in the direction of the second rotor element, which is preferably arranged below the first rotor element. In the axial direction, the conveying wings preferably have a curved course or a curved wing shape. In addition, an effective transformation of the rotational movement of the first rotor element is ensured in a conveying movement of the product with a primarily axial component of movement.

Preferably, the second rotor element has a plurality of conveying blades, which are adapted to effect a second conveying movement of the product with a radial component of movement to the outside. Preferably, the second rotor element, here a radial pumping wheel, has an axial, preferably centrally arranged inlet for the product to be moved and, in particular, to be homogenized. The inlet of the second rotor element faces the first rotor element, wherein preferably the first rotor element is arranged above the second rotor element. The outlet of the second rotor element is provided on the peripheral surface of the second rotor element. To implement the second, radial conveying movement of the product, the second rotor element has a plurality of conveying blades in the region of its outer circumference. The conveying blades have a preferably curved course or have a shape which essentially corresponds to a section of a spiral running outward from the axis of rotation.

According to a preferred embodiment of the present invention, the second rotor element is associated with a stator having a plurality of stator elements through which the product passes during the second conveying movement generated by the second rotor element. This achieves an improved shearing stress and a preferably homogeneous mixing of the product emerging from the second rotor element. Powdery addition substances, which are introduced into a preferably liquid or pasty product, can be broken up in a simplified manner with the aid of the stator assigned to the second rotor element. The stator is associated with the periphery of the second rotor element, preferably the outer circumference and thus the outlet of the second rotor element. The stator thus forms with its stationary stator elements a flow resistance for the conveyed product. The stationary stator elements preferably extend parallel to the axis of rotation of the second rotor element.

In a preferred embodiment of the invention, the rotor elements are accommodated in a housing, wherein the housing has an inlet opening for the inflow of the product into the interior of the housing and an outlet opening for the outflow of the product from the interior. The product receives a preferred flow direction when flowing through the housing of the pumping and / or mixing device by means of the first and / or second rotor element. Preferably, the inlet opening for the housing is aligned axially with respect to the first rotor element. The outlet opening of the housing is preferably provided in a radial wall section. Thus, the preferably circulating flowable product with low pressure losses in the housing of the pumping and / or mixing device according to the invention and flow out again. Preferably, the housing of the pumping and / or mixing device has a cylindrical configuration.

According to one embodiment of the invention, it is provided that the housing preferably has a feed opening for a material to be introduced into the product and / or additionally a discharge opening of a bypass line in a preferably cylindrical wall section which preferably adjoins the first rotor element or axially in the axial direction is disposed between the first and second rotor element is / are. The provision of an addition opening in the housing of the pumping and / or mixing device for an additive to be introduced into the flowable product has the advantage that a floating example of a powdery additive by the direct addition to a run directly through the pumping and / or mixing device liquid Product can be reduced. By introducing adjacent to the first rotor element of the input additive preferably receives a targeted direction of movement by the first rotor element. With the downstream second rotor element is preferably carried out a uniform distribution of the additive in the funded, flowable product. The formation of, for example, composed of the additive solids clumps within the flowable product is thus counteracted.

In an alternative embodiment, a discharge opening is preferably formed in the cylindrical wall portion of the housing of the pumping and / or mixing device axially between the first and second rotor element. With the discharge opening corresponds to a bypass line, which establishes a connection directly to the circulation line. Thus, a partial flow of the flowable product flowing through the pumping and / or mixing device can be conducted past the second rotor element and diverted directly into the circulation line. The term "bypassing" is to be understood in the present case that the partial flow of the product, which flows through the bypass line, does not come into contact with the second rotor element. It is understood that the fluid and product flow in the addition of the housing fluidly connected to the metering lines and bypass lines using appropriate actuators such as valves, released or can be interrupted.

In one embodiment of the invention, the interior of the housing in the conveying direction between the first rotor element and the second rotor element on a flow area with a, preferably in the flow direction, reducing flow cross-section. It is thereby achieved that the flow velocity within the pumping and / or mixing device preferably having a housing is increased. The introduction of an additive in the funded product stream is thus simplified. In addition, by means of the decreasing flow cross-section of the axial inlet region for the second, preferably designed as a radial pumping rotor element is generated. The housing is also divided by the decreasing in the flow direction flow cross-section spatially into two housing areas. Preferably, the housing is formed at least in two parts, wherein each housing part preferably forms at least one of each housing part receiving a rotor element. In one embodiment, the housing has a funnel-shaped inlet opening in the flow direction in front of the first rotor element.

In an alternative embodiment to a pumping and / or mixing device with an axial pumping wheel and a radial pumping wheel, the first and the second rotor element are designed as stirring parts, each with two or more stirring blades. With the help of the preferably counter-rotating stirring parts, the shear stress can be increased in an advantageous manner, in particular in the case of a pulverulent product, such as, for example, powder materials. This has the consequence that the powdery but flowable product is optimally broken in the gap between the rotor elements designed as stirring parts. Preferably, the uniformity of the mixing of the flowable product is further improved with the spaced-apart stirring parts. A circulation of the flowable product is preferably not reacted with the rotor elements designed as stirring parts.

Preferably, the offset between the rotor elements designed as stirring parts is chosen such that a shear gap extending in one plane is formed. This is compared to two rotor elements, which have interlocking sections or areas, an enlarged shear gap formed with the pure powdered products can be mixed evenly with high efficiency.

According to another embodiment of the invention, it is provided that the shear gap has a gap, which is in the range of about 2 to 25 mm. Preferably, the shear gap has a gap in the range between 5 and 20 mm.

The first and the second rotor element each have two or more substantially radially to the axis of rotation extending impeller. With the help of the stirring blades formed on the rotor elements, a shearing force is preferably generated at different levels within the flowable product by the rotor elements, which preferably rotate in opposite directions. In addition, the shear stress in the product and the associated mixing of the product is further improved. In a preferred embodiment of the invention, the first and the second rotor element have differently long stirring blades. Furthermore, the stirring vanes of the first and second rotor elements can have a purely radial orientation. Preferably, at least a portion of the impeller, with respect to the axis of rotation, in the axial or movement direction have a curved course or extend at an angle not equal to 90 °. Preferably, projections or teeth may be formed on the agitating blades which project or protrude in the circumferential direction, in the tangential and / or in the axial direction on the agitating blades. In this case, a circumferential shear gap between the first and second rotor elements preferably continues to be formed.

According to another development of the pumping and / or mixing device according to the invention, the first rotor element additionally has a plurality of inclined blades running at an angle to its axis of rotation. Preferably, the additional impellers extend at an angle in the range of about 5 to 85 degrees inclined to the axis of rotation on the first rotor element. In this case, the additional stirring blades are arranged on the side of the first rotor element, which faces away from the second rotor element of the pumping and / or mixing device according to the invention. These too oblique to Rotation axis aligned impellers may have protrusions or teeth.

Another aspect of the invention relates to an apparatus for homogenizing and / or dispersing flowable products, in particular emulsions or dispersions, with at least one container for receiving a product, and a pumping and / or mixing device according to at least one of the preferred embodiments described above, which is arranged in a region of the container interior or fluidly coupled to the container interior. With the aid of such a device designed according to the invention, a more uniform and thus improved distribution of an admixed, in particular powdery, addition substance into a flowable product is achieved. The floating of an additive or the formation of solid clumps can be counteracted improved with spaced apart rotor elements. Furthermore, with the aid of the axially spaced-apart rotor elements, the device makes it possible to achieve a uniform distribution of the starting materials in a purely pulverulent product to which a binder is added only subsequently, ie after the preparation of a uniformly mixed powder mixture. With regard to possible embodiments of the pumping and / or mixing device, reference is made to the above statements on the preferred developments of the pumping and / or mixing device.

According to a preferred embodiment of the device according to the invention, the pumping and / or mixing device is arranged above the container bottom. Such an embodiment is preferred when a mixing operation is to be implemented within the container. Depending on the flowable product in the container, first and second rotor elements designed as axial pumping wheel and radial pumping wheel or rotor elements designed as stirring parts are then used, for example.

According to a preferred embodiment of the invention, wherein the pumping and / or mixing device preferably have a housing accommodating the first rotor element and the second rotor element, the pumping and / or mixing device is arranged in a section of a circulation line connected to the container. In an alternative embodiment, the pumping and / or mixing device is arranged at a distance from the stirring container, so that in each case before and after the pumping and / or mixing device, a pipe section of predetermined length is provided for connection to the container. The pumping and / or mixing device is then preferably arranged inline, wherein the described embodiment is also referred to as a stand-alone version.

Alternatively, according to one embodiment of the invention, the pumping and / or mixing device is arranged in a section of the circulation line which is directly associated with an outlet opening of the container formed on the container bottom. The inlet opening of the pumping and / or mixing device is fluid-conductively connected to the outlet opening of the container, or the inlet opening of the pumping and / or mixing device forms the outlet opening of the container. Preferably, the rotor elements of the pumping and / or mixing device are arranged directly below the container bottom. Preferably, the center axis of the outlet opening is arranged coaxially to the center axis of the container, whereby a uniform discharge of the flowable product from the interior of the container is ensured. The circulation line, in particular its pressure side, which leads from the outlet opening of the housing of the pumping and / or mixing device back to the container, is fluid-conductively connected to a side wall of the container. The inlet opening in the container is z. B. provided or arranged in the upper half of a portion of the side wall of the container. The entrance for the circulation line can also be in another place, such. B. in a lower portion of the side wall or at the bottom of the container may be provided within the container, a rotating agitator is preferably arranged with a plurality of relatively movable agitator parts. With the help of a stirrer, the amount of product in the container can be kept on the whole in an advantageous manner in motion. This is preferably counteracted segregation of the product within the container and thus maintain its homogeneity. Preferably, an agitator, such as an anchor agitator or a Koaxialrührwerk, is used with at least two relatively movable agitating parts, which can also be moved in each case relative to the container. Each stirring part preferably has a plurality of displacer elements arranged in the radial direction to the container longitudinal axis, also referred to as mixing blades. With the displacer elements, the product is set in motion in the container, wherein the formation of a trombone within the container is avoided by the preferably counter-rotating stirring parts. Preferably, the axes of rotation of the stirring parts are arranged coaxially or at least parallel to the center axis of the container. Both stirring parts are preferably each assigned a separate drive device with which the stirring parts are movable independently of each other.

The invention will be described in more detail by means of possible embodiments with reference to the accompanying figures. Hereby show:

1 a view of a first embodiment of a device according to the invention for homogenizing and / or dispersing;

2 a view of a second embodiment of a device according to the invention in partial section;

3 a partial view of a further embodiment of a device according to the invention;

4 a partial view of a fourth embodiment of an inventive device in partial section;

5 a partial view of another embodiment of a device according to the invention with a stirrer in partial section;

6 a partial view of a further embodiment of a device according to the invention with a stirrer in partial section;

7 a view of a first embodiment of a pumping and / or mixing device according to the invention;

8th a view of a second embodiment of a pumping and / or mixing device according to the invention;

9 a perspective view of a third embodiment of a pumping and / or mixing device according to the invention; and

10 a perspective view of a further embodiment of a pumping and / or mixing device according to the invention;

11 a view of a further embodiment of a device according to the invention in partial section, and

12 a partial view of an embodiment of the pumping and / or mixing device according to the framing in 11 ,

1 shows a device 1 for homogenizing and / or dispersing flowable products containing a container 2 , also referred to as a stirred tank having. With the container 2 is about a derivative 4 , starting from the container 2 , the suction side of a pumping and / or mixing device 6 connected, which in turn with its pressure side via a supply line 8th with the container 2 fluidly connected. The supply and supply line 4 . 8th form a circulation line, via the one in the container 2 flowable product can be circulated in intervals or continuously. The inlet 10 the derivative 4 is with the tank bottom 12 , and the outlet 14 the supply line 8th is with the sidewall 16 of the container 2 coupled. The arrows 18 . 18 ' give in the illustrated embodiment, the flow direction of a in the container 2 located product during a pumping and / or mixing process.

The pumping and / or mixing device 6 is separate to the container 2 positioned and forms a so-called stand-alone variant. The pumping and / or mixing device 6 includes two drive devices 20 . 22 , which drive the pumping and / or mixing elements, not shown in detail, as described in more detail below. The input of precursors for making one inside the container 2 to be generated flowable product via non-illustrated filling and input ports, which are provided or arranged in particular in the upper region of the container. The draining or dispensing of a finished product takes place in particular in the container bottom 12 trained drain openings, not shown, or via a branch not shown on the circulation line or at the in 1 shown and detailed in the following figures pumping and / or mixing devices.

In 2 is a device 1' shown a container 2 ' has, in the container bottom 12 an outlet opening 24 is provided below the directly a pumping and / or mixing device 6 ' is arranged. The outlet opening 24 at the bottom of the container 12 at the same time forms the inlet opening 25 the pumping and / or mixing device 6 ' , The outlet opening 26 the pumping and / or mixing device 6 ' is via a circulation pipe 28 with the sidewall 16 of the container 2 ' Connected to the media, creating a circuit for circulating a in the container 2 ' product is formed. The arrows 18 . 18 ' in turn indicate the direction of flow of the mixture received within the container.

The partially shown in section pumping and / or mixing device 6 ' has a housing 30 in which a first rotor element 32 and a second rotor element 34 is arranged. The first rotor element 32 is with the first drive device 20 , and the second rotor element 34 is with the second drive means 22 mechanically, in particular rotating, coupled. First rotor element 32 and first drive means 20 are via a first drive shaft 36 coupled together. The second rotor element 34 is with the second drive means 22 via a second drive shaft 38 coupled. Both drive shafts 36 . 38 are coaxially arranged, wherein the second drive shaft 38 is formed as a hollow shaft, within which the first drive shaft 36 is rotatably mounted. First and second rotor element 32 . 34 are driven separately from each other, so that the rotor elements can be driven in the same direction or in opposite directions and also be moved at different speeds. As 2 clarifies, have the rotor elements 32 . 34 in the longitudinal direction of their axes of rotation an axial offset from each other. First and second rotor element are thus arranged at a distance from each other. Additionally is on the housing 30 the pumping and / or mixing device 6 ' a metering line 60 arranged, via which the input or introduction of solid, liquid or pasty additives can take place. arrow 39 indicates the flow direction of the additive in the direction of the pumping and / or mixing device 6 ' at.

In 3 is another embodiment of a device according to the invention 1'' shown a container 2 '' includes, to which no circulation line for a product is connected. At the tank bottom 12 is a pumping and / or mixing device 6 '' arranged such that the pumping and mixing elements are arranged in the interior of the container. The pumping and / or mixing device 6 '' has a first rotor element 32 ' and a second rotor element 34 ' on. First and second rotor element 32 ' . 34 ' are according to the in 2 shown embodiment on the drive shafts 36 . 38 with a first drive device 20 and a second drive device 22 mechanically coupled. The first and the second rotor element 32 ' . 34 ' are by means of the drive means 20 . 22 arbitrarily drivable. Thus, the rotational speed and the direction of rotation of the rotor elements 32 ' . 34 ' be changed. By changing the direction of rotation of the first and second rotor element and the conveying direction of the mixture within the container 2 '' changed.

By means of the pumping and / or mixing device 6 '' the product is inside the container 2 '' circulated. The first rotor element 32 ' is as axial pumping wheel, and the second rotor element 34 ' is designed as a radial pumping wheel. First and second rotor element 32 ' . 34 ' are axially spaced with respect to their axis of rotation. The first rotor element 32 has a plurality of radially projecting to the axis of rotation conveyor wing 40 . 40 ' which are adapted to a conveying movement of the product or of the mixture in the longitudinal direction of its axis of rotation and thus in the direction of the second rotor element 34 ' to effect. The second rotor element 34 ' includes several curved conveyor blades 42 . 42 ' ( 7 ), which are adapted to effect, relative to its axis of rotation, a conveying movement of the product in the radial direction to the outside. The inside of the container 2 '' arranged first and second rotor elements 32 ' . 34 ' rotate in particular in opposite directions to each other, whereby the emergence of a trombone is counteracted within the container. As 3 also clarifies, is the pumping and / or mixing device 6 '' to the tank bottom 12 flanged.

In 4 a fourth embodiment of an apparatus for homogenizing and / or dispersing flowable products is shown. The device 1''' has a self-contained container 2 ''' without a circulation pipe on. A pumping and / or mixing device 6 ''' is in the embodiment shown again directly above the container bottom 12 of the container 2 ''' arranged. The pumping and / or mixing device 6 ''' in turn has a first rotor element 32 ''' and a second rotor element 34 '' on, which at least partially into the interior of the container 2 ''' protrude.

Unlike the in 3 In the embodiment shown, this exemplary embodiment has first and second rotor elements designed as stirring parts 32 '' . 34 '' on. The rotor elements 32 '' . 34 '' have two or more impellers 44 . 44 ' on, which at least substantially in the radial direction of the axes of rotation of the first and second rotor element 32 '' . 34 '' protrude. Furthermore, the first rotor element 32 '' additionally several, preferably two at an angle inclined to its axis of rotation extending impeller 46 . 46 ' on which towards the interior of the container 2 ''' protrude. Such as stirring parts formed rotor elements 32 '' . 34 '' are used for mixing powdery products. First and second rotor element 32 '' . 34 '' also have an axial offset from each other, which is selected such that a shear gap extending in a plane 47 is formed, in which no regions or portions of the rotor elements protrude. The between the first and second rotor element 32 '' . 34 '' trained shear gap 47 has a gap that is in the range of about 2 to 25 mm.

Similar to the previous embodiments, the first and second rotor elements formed as stirring parts 32 '' . 34 '' by means of the drive devices 20 . 22 be driven in opposite directions as well as in the same direction and with varying speeds. First and second rotor element 32 '' . 34 '' are via a correspondingly mechanically coupled to the rotor elements drive shaft 36 . 38 with the respective drive devices 20 . 22 mechanically connected. The second drive shaft 38 is again designed as a hollow shaft, in the free interior of the first drive shaft 36 is arranged rotatably.

The 5 and 6 show alternative embodiments of a device according to the invention 1''' , which optionally to the rotor elements designed as stirring parts 32 '' . 34 '' one each agitator 48 . 48 ' include. With the help of the agitators 48 . 48 ' gets into a container 2 ''' product as a whole kept in motion. The agitator 48 ( 5 ), which is designed as an anchor agitator, comprises a stirring member 50 the axis of rotation coaxial with the central axis of the container 2 ''' is aligned. Furthermore, the agitator includes 48 at least two stirring parts 52 . 52 ' whose axes of rotation uniformly spaced around the axis of rotation of the stirring member 50 are arranged around. The stirring parts 50 . 52 . 52 ' have a variety of displacement elements 54 . 54 ' on. The displacer elements 54 . 54 ' the stirring parts 52 . 52 ' move contactlessly between the arranged at different heights displacement elements 54 . 54 ' of the stirring part 50 past. The displacer elements 54 . 54 ' Both stirring parts have a height offset to each other.

The agitator 48 the in 6 shown embodiment of the device according to the invention 1''' has two coaxial stirring parts 56 . 56 ' each with arranged thereon displacement elements 58 . 58 ' on. The displacer elements 58 . 58 ' are at intervals in height one above the other at a respective stirring part 56 . 56 ' arranged. In the distances between the displacement elements 58 . 58 ' of the first stirring part 56 run the displacement 58 . 58 ' of the second stirring part 56 ' during the relative movement of the stirring parts 56 . 56 ' therethrough. The displacer elements 58 . 58 ' the two in one embodiment in opposite directions rotating stirring parts 56 . 56 ' have a height offset to each other. Above the tank bottom 12 of the container 2 ''' is in both in the 5 and 6 Illustrated embodiments, a pumping and / or mixing device 6 ''' provided, which formed as a stirring rotor elements 32 '' . 34 '' includes. The rotor elements 32 '' . 34 '' are driven similarly as in the previously described embodiments via coupled to the rotor elements drive shafts, which with the drive means 20 . 22 are pivotally connected.

In the 7 and 8th are detailed views of the in the 1 and 2 shown embodiments of the pumping and / or mixing device 6 . 6 ' shown. The pumping and / or mixing device 6 . 6 ' includes a housing 30 with an inlet opening 25 and an outlet opening 26 , The inlet opening 25 is with, for example, a derivative 4 ( 1 ) or forms the outlet opening 24 of the container 2 ' ( 2 ). Inside the case 30 are the first and the second rotor element 32 . 34 the pumping and / or mixing devices 6 . 6 ' arranged. The first and the second rotor element 32 . 34 have an axial offset from each other in the longitudinal direction of their axes of rotation. The first rotor element 32 with his conveyor wings 40 . 40 ' is thus axially spaced from the second Rortorelement 34 with its conveyor blades 42 . 42 ' , The distance is at least about one fifth of the diameter of the first or second rotor element 32 . 34 ,

In a preferred embodiment, the distance or the axial offset between the first and second rotor element is variable. As the 7 and 8th further show is inside the housing 30 an addition opening 60 ' or feed line 60 for introducing or adding an additive in the through the housing 30 arranged flowing mixture or product. The addition opening 60 ' or feed line 60 is in a radial wall section 61 of the housing 30 arranged adjacent to the first rotor element. Furthermore, the interior of the housing in the conveying direction between the first rotor element 32 with his conveyor wings 40 . 40 ' and the second rotor element 34 a flow area 62 with a decreasing flow area.

The interior of the housing 30 is due to the narrowing flow area 62 in two chambers 64 . 64 ' divided. As 7 and 8th further clarify, is the case 30 formed in two parts, each chamber 64 . 64 ' of the housing 30 is made of a separate component. In 7 is the second rotor element 34 with its conveyor blades 42 . 42 ' a stator 66 with a variety of stator elements 68 . 68 ' assigned. The stator 66 is flowed through by the mixture or the product during the second conveying movement generated by the second rotor element in an approximately radial direction to the axis of rotation of the second rotor element.

In the 8th embodiment shown does not include the second rotor element 34 associated stator. With the in 8th shown pumping and / or mixing device 6 ' is, in contrast to the embodiment of 7 achieves a reduced shear stress of the product passing through the housing 30 is encouraged. From the 7 and 8th is further the mechanical coupling between the first rotor element 32 and the first drive shaft 36 and the second rotor element 34 and the second drive shaft 38 clarified.

9 shows a perspective view of another embodiment of the particular in 3 illustrated rotor elements 32 ' . 34 ' the pumping and / or mixing device 6 '' , The first rotor element 32 ' is at a distance to the second rotor element 34 ' arranged. The first rotor element designed as an axial pumping wheel has a plurality, preferably two to five conveying blades 40 . 40 ' on, which protrude substantially radially to the axis of rotation. The conveyor wings 40 . 40 ' are arranged inclined in the axial direction, whereby upon rotation of the first rotor element 32 ' a promotional movement of the rotor member 32 ' immediately surrounding product is reacted in the axial direction. At the outer end are the conveying wings 40 . 40 ' over a ring part 70 connected with each other.

The second rotor element 34 ' is below the first conveyor element 32 ' arranged. The second rotor element 34 ' has several curved conveyor blades 42 . 42 ' having a radially directed and circumferentially directed course. Adjacent to the outer periphery of the second rotor element 34 ' is a stator 66 arranged, the a plurality of spaced apart from each other at predetermined stator elements 68 . 68 ' Has. By means of the relative to the stator 66 moving conveyor blades 42 . 42 ' The product to be circulated will pass through the existing slots 72 between the stator elements 68 . 68 ' conveyed.

10 shows a detailed representation of the rotor elements 32 '' . 34 '' , which are used as stirring parts for mixing a product preferably present as a pure powder phase. First and second rotor element 32 '' . 34 '' each have a plurality, preferably two substantially in the radial direction to the axis of rotation of the rotor elements 32 '' . 34 '' protruding impellers 44 . 44 ' on. At the first rotor element 32 '' In addition, they are also in 4 pictured additional impeller 46 . 46 ' arranged, which in the embodiment shown at an angle in the range of about 20 ° to 25 ° inclined to the axis of rotation of the first rotor element 32 '' run. First and second rotor element 32 '' and 34 '' are arranged to each other so that between both rotor elements, a continuous shear gap 47 is designed for the product to be mixed. The gap is approximately in the range between 2 and 25 mm, preferably in the range between 5 and 20 mm. The first rotor element 32 '' is with the first drive shaft 36 , and the second rotor element 34 '' is with the second drive shaft designed as a hollow shaft 38 ( 4 and 6 ) mechanically coupled.

In 11 is an alternative embodiment to that in FIG 2 pictured device according to the invention 1' shown for homogenizing and / or dispersing flowable products. The device 1' has a container 2 ' with an outlet opening 24 on, the fluid-conducting with a pumping and / or mixing device 6 ' is coupled. The outlet opening immediately downstream pumping and / or mixing device 6 includes, as in the previous embodiments, a first rotor element 32 and a second rotor element 34 , The rotor elements 32 and 34 be about the respective corresponding drive means 20 . 22 driven. The first rotor element 32 is primarily as axial pump and the second rotor element 34 designed as a radial pumping wheel. To the outlet opening 26 the pumping and / or mixing device 6 ' is a circulation line 28 connected, which in the embodiment shown in an upper portion of the side wall 16 of the container 2 ' opens. The flow direction of the circulated mixture is indicated by the arrows 18 . 18 ' specified. The circulation pipe 28 can also work with other areas of the container, such as a lower section of the sidewall 16 of the container 2 ' or the bottom of the container 12 be connected fluidly.

In addition to the in 2 shown embodiment with their on the housing 30 arranged Zugabeleitung 60 is also a bypass line 74 intended. With the Bypassleitug 74 is a fluid-conducting connection between a cylindrical wall section 61 of the housing 30 and a section of the circulation line 28 The discharge opening of the bypass line 74 is about the same distance between the inlet opening 25 and the outlet opening 26 the pumping and / or mixing device 6 ' arranged.

In 12 is a detailed view of the pumping and / or mixing device 6 ' out 11 displayed. As 12 shows are the feed line 60 for entering additives and the bypass line 74 with a cylindrical wall section 61 of the housing 30 connected, in essence, in the axial direction of the pumping and / or mixing device 6 ' seen between the first and the second rotor element 32 . 34 is arranged. By means of the bypass line 74 In particular, a partial flow (arrow 76 ) of the product stream flowing through the pumping and / or mixing device out of the chamber 64 branched off and without the second rotor element 34 getting in touch, so the second chamber 64 ' and the second rotor element 34 immediately, in the circulation line 28 directed. The flow rate (arrow 39 ) of the additive in the metering line 60 and the fluid flow through the bypass line 74 on the second rotor element vorbeigeleiteten product partial flow (arrow 76 ) can be controlled or adjusted by means not shown in detail, such as control valves.

Similar or identical components are designated by the same reference numerals.

LIST OF REFERENCE NUMBERS

1, 1 ', 1' ', 1' ''

contraption

2, 2 ', 2' ', 2' ''

container

4

derivation

6, 6 ', 6' ', 6' ''

Pumping / mixing device

8th

supply

10

inlet

12

container bottom

14

outlet

16

Side wall

18, 18 '

Flow direction mixture

20, 22

driving means

24

outlet opening

25

inlet port

26

outlet

28

circulation line

30

casing

32, 32 ', 32' '

first rotor element

34, 34 ', 34 "

second rotor element

36, 38

drive shaft

39

Flow direction addition substance

40, 40 '

conveying wings

42, 42 '

impeller blade

44, 44 '

impellers

46, 46 '

impellers

47

shear gap

48, 48 '

agitator

50, 52, 52 '

agitating

54, 54 '

displacement

56, 56 '

agitating

58, 58 '

displacement

60

addition line

60 '

feed opening

61

wall section

62

Flow range

64, 64 '

chamber

66

stator

68, 68 '

stator

70

ring part

72

slot

74

bypass line

76

partial flow

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 29917365 U1 [0003, 0003]
• EP 1125625 B1 [0004]

Claims (21)

Pumping and / or mixing device for conveying, homogenizing and / or dispersing flowable products, having a first rotor element rotatably mounted about a first axis of rotation (US Pat. 32 . 32 ' . 32 '' ), which by means of a drive device ( 20 ), and a second rotor element rotatably mounted about a second axis of rotation (US Pat. 34 . 34 ' . 34 '' ), which by means of a drive device ( 22 ), characterized in that the first rotor element ( 32 . 32 ' . 32 '' ) and the second rotor element ( 34 . 34 ' . 34 '' ), relative to their axes of rotation, have an axial offset from each other. Pumping and / or mixing device according to claim 1, characterized in that the axes of rotation of the first and second rotor element ( 32 . 32 ' . 32 '' . 34 . 34 ' . 34 '' ) are substantially parallel to each other, preferably coaxially arranged. Pumping and / or mixing device according to at least one of claims 1 and 2, characterized in that the first rotor element ( 32 . 32 ' . 32 '' ) with a first drive shaft ( 36 ) and the second rotor element ( 34 . 34 ' . 34 '' ) with a second drive shaft ( 38 ), which by means of various drive devices ( 20 . 22 ) are driven, wherein preferably one of the drive shafts ( 38 ) is designed as a hollow shaft. Pumping and / or mixing device according to at least one of claims 1 to 3, characterized in that the axial offset between the first and second rotor element ( 32 . 32 ' . 32 '' . 34 . 34 ' . 34 '' ) is changeable. Pumping and / or mixing device according to at least one of claims 1 to 4, characterized in that the first rotor element ( 32 . 32 ' . 32 '' ) as axial pumping wheel and / or the second rotor element ( 34 . 34 ' . 34 '' ) is designed as a radial pumping wheel. Pumping and / or mixing device according to at least one of claims 1 to 5, characterized in that the first rotor element ( 32 . 32 ' ) a plurality of substantially radially projecting to the axis of rotation conveyor wings ( 40 . 40 ' ), which are adapted to, preferably a first conveying movement of the product in the direction of the second rotor element ( 34 . 34 ' ) to effect. Pumping and / or mixing device according to at least one of claims 1 to 6, characterized in that the second rotor element ( 34 . 34 ' ) preferably a plurality of conveying blades ( 42 . 42 ' ), which are adapted to cause a second conveying movement of the product with a radial component of movement to the outside. Pumping and / or mixing device according to at least one of claims 1 to 7, characterized in that the second rotor element ( 34 . 34 ' ) a stator ( 66 ) with a plurality of stator elements ( 68 . 68 ), through which the product is conveyed during movement with the second rotor element ( 34 . 34 ' ) passes through the second conveying movement generated. Pumping and / or mixing device according to at least one of claims 1 to 8, characterized in that the rotor elements ( 32 . 34 ) in a housing ( 30 ), wherein the housing ( 30 ) an inlet opening ( 25 ) for flowing the product into the interior of the housing and an outlet opening ( 26 ) to flow out of the product from the interior. Pumping and / or mixing device according to claim 9, characterized in that the housing ( 30 ) in a preferably cylindrical wall section bounding the interior space ( 61 ) a metering line ( 60 ) or feed opening ( 60 ' ) for a substance to be introduced into the product and / or additionally a discharge opening of a bypass line ( 74 ), which preferably in the axial direction adjacent to the first rotor element ( 32 ) or axially between the first and second rotor elements ( 32 . 34 ) is / are arranged. Pumping and / or mixing device according to at least one of claims 8 and 9, characterized in that the interior of the housing ( 30 ) in the conveying direction between the first rotor element ( 32 ) and the second rotor element ( 34 ) has a flow area with a decreasing flow area. Pumping and / or mixing device according to at least one of claims 1 to 4, characterized in that the first and the second rotor element ( 32 '' . 34 '' ) as stirring parts with two or more stirring blades ( 44 . 44 ' . 46 . 46 ' ) are formed. Pumping and / or mixing device according to claim 12, characterized in that the offset between the rotor elements formed as stirring parts ( 32 '' . 34 '' ) is selected such that a shearing gap extending in one plane ( 47 ) is trained. Pumping and / or mixing device according to claim 13, characterized in that the shear gap ( 47 ) has a gap that is in the range of about 2 to 25 mm. Pumping and / or mixing device according to at least one of claims 12 to 14, characterized in that the first and second rotor element ( 32 '' . 34 '' ) each two or more substantially radially to the axis of rotation extending stirring blades ( 44 . 44 ' ) having. Pumping and / or mixing device according to at least one of claims 12 to 15, characterized in that the first rotor element ( 32 '' . 34 '' ) additionally at an angle inclined to its axis of rotation extending impeller ( 46 . 46 ' ) having. Device for homogenizing and / or dispersing flowable products, in particular emulsions or dispersions, with at least one container ( 2 . 2 ' . 2 '' . 2 ''' ) for receiving a product, and a pumping and / or mixing device ( 6 . 6 ' . 6 '' . 6 ''' ) according to at least one of claims 1 to 16, which in an inner region of the container ( 2 . 2 ' . 2 '' . 2 ''' ) or with the interior of the container ( 2 . 2 ' . 2 '' . 2 ''' ) is coupled in a fluid-conducting manner. Apparatus according to claim 17, characterized in that the pumping and / or mixing device ( 6 '' . 6 ''' ) above the container bottom ( 12 ) is arranged Apparatus according to claim 17, characterized in that the pumping and / or mixing device ( 6 . 6 ' ) in a section of a container ( 2 . 2 ' ) connected circulation line ( 28 ) is arranged. Apparatus according to claim 19, characterized in that the pumping and / or mixing device ( 6 ' ) in a section of the circulation line ( 28 ), one in the container bottom ( 12 ) formed outlet opening ( 24 ) of the container ( 2 ' ) is assigned directly. Device according to at least one of claims 17 to 20, characterized in that inside the container ( 2 ''' ) a rotating agitator ( 48 . 48 ' ) with a plurality of relatively movable agitator parts ( 50 . 52 . 52 ' . 56 . 56 ' ) is arranged.

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