EP3349889A2

EP3349889A2 - Stirring element, stirring rod assembly, and transport and storage container for liquids, having a stirring rod assembly

Info

Publication number: EP3349889A2
Application number: EP16757835.0A
Authority: EP
Inventors: Peter BLÖMER; Carsten BÜSCH
Original assignee: Protechna SA
Current assignee: Protechna SA
Priority date: 2015-09-18
Filing date: 2016-08-11
Publication date: 2018-07-25
Also published as: SG11201801154SA; IL257557A; ZA201801539B; WO2017045846A2; US20180236419A1; BR112018004625A2; WO2017045846A3; IL257557B; AU2020200139B2; KR20180034592A; AU2020200139A1; JP2018527175A; CL2018000468A1; DE102015011967A1; CO2018003858A2; JP6674017B2; AU2016321714A1; CA2997466C; CN108025269A; TW201713406A

Abstract

The invention relates to a stirring element (90) for an industrial stirrer, especially for a stirring rod assembly for connection to a stirrer combinable with a container for receiving liquids, an upper wall of the container having a fill opening for filling the container, which fill opening can be closed by a lid. The stirring element can be connected to a rod-shaped stirring element holder of the stirring rod assembly, the stirring element having a mounting end (91) and a stirring element end (94) which is connected to the mounting end by way of a connecting piece (92) and is provided with a flow tube (93), said flow tube having a tube wall and an annular back-up face (95) at its flow admission section, and the back-up face having at least one annular portion (96) that is inclined relative to an inflow plane of the flow admission section.

Description

Stirring device, stirring bar arrangement and transport and storage containers for liquids with a stirring bar arrangement

The invention relates to a stirrer for an industrial stirrer, in particular for a Rührstabanordnung for connection to a combinable with a container for holding liquid agitator, the container having in an upper bottom wall a closable with a lid filling opening for filling the container, wherein the stirring member a rod-shaped Rührorganträger the Rührstabanordnung is connectable, wherein the stirring member has a bearing end and a connected via a web to the bearing end formed with a flow tube Rührorganende, wherein the flow tube has a pipe wall.

An agitator in a stirring rod arrangement of the type mentioned is known from DE 20 2014 002 901 U l. The known stirrers of Rührstabanordnung are in a mounting configuration in which the stirring rod assembly can be used in a container for receiving liquids, pivoted against the Rührorganträger and secured in this position via a latching connection to Rührorganträger. The stirring elements themselves are arranged pivotably mounted at a bearing end on a Rührorganträger and have starting from the bearing end a web on the Rührorganende a flow tube is attached. The flow tube is cone-shaped and has a flow inlet cross-section which is larger than a flow outlet cross-section.

From DE 10 2008 063 393 B3 a stirrer is known, which has an annular storage area. The storage area is located in an inflow plane of a flow inlet cross-section of an opening of the stirring element. A flow tube is formed in the form of a bead on the storage surface or opening.

A disadvantage of the known stirring elements is that no satisfactory mixing can be achieved according to the viscosity and flow behavior of the liquid to be mixed. Nevertheless, it is desirable to achieve a stable centering of the stirring elements on a rotating path of the stirring rod arrangement.

The object of the present invention is to propose a stirring element and a stirring rod arrangement which has improved mixing properties. This object is achieved by a stirrer with the features of claim 1, a stirring rod assembly with the features of claim 1 1 and a transport and storage container with the features of claim 15 dissolved.

The stirrer according to the invention for an industrial stirrer, in particular for a stirring rod assembly for connection to an agitator combinable with a container for holding liquids, the container having in an upper bottom wall a closable with a lid filling opening for filling the container, is provided with a rod-shaped Rührorganträger the stirring bar arrangement connectable, wherein the stirring member has a bearing end and connected via a web to the bearing end formed with a flow tube Stirring end, wherein the flow tube has a pipe wall, wherein the flow pipe at its Strömungseintrittsquer- cut has a circular formed Staufläche, wherein the storage surface at least one circular ring sector has, which is inclined relative to an inflow plane of the flow inlet cross-section.

By means of the circularly formed storage surface, which has at least one circular ring sector which is inclined with respect to an inflow plane of the flow inlet cross section, a force additionally acting on the stirrer elements can be generated at a defined location which serves to influence a relative movement of the stirrer end in the flow environment. At the same time, the annular area of the storage area allows a very good mixing of a liquid to be mixed, since a turbulence of the liquid is produced.

At the same time, the force generated by the inclined circular sector on the agitating the stirrer stabilize or center so far that despite the turbulence generated by the storage surface in the liquid to be mixed a quiet and low-vibration circulation of Rührstabanordnung on a rotational path is possible.

In one embodiment of the stirring element, it can be provided that the inclined circular sector extends, relative to a circular center point, to at least at least 90 °, preferably at least 180 °, particularly preferably at least 270 °, of the storage area. Depending on the viscosity and flow behavior of the fluid to be mixed, the inclined

Annular sector then be adapted to the mixing task. The inclined circular ring sector can be arranged opposite a connection surface or planar partial surface of the web, relative to the center of the circular ring. Furthermore, the storage area can have at least one surface sector which, in relation to a flat partial area of the storage area, can be surrounded by a surface area. Sector angle ζ is inclined, wherein the surface sector angle ζ may be preferably 1 0 °. For example, the area sector can then also be flat. The area sector angle ζ can for example also be 5 ° or up to 20 °. In another embodiment, the sloped annulus sector may extend relative to a center of the annulus to over 360 degrees of the jamming surface. Consequently, the entire storage area may be inclined relative to the inflow plane of the flow inlet cross section.

The circular ring sector may also be inclined by a surface sector angle,, wherein the area sector angle may be constant. Thus, therefore, the storage area may be formed conical or funnel-shaped, wherein the storage surface forms a relative to the flow tube comparatively flat cone in the manner of a funnel. A surface sector angle ζ of the cone may be 5 ° to 20 °, preferably 10 °. The area sector angle ζ is measured at one edge of the circular sector and can vary by ⁺ / _ 1 °.

Further, the circular ring sector may be inclined by a surface sector angle,, wherein the surface sector angle along the circular ring sector according to a non-linear, preferably a trigonometri- see function is continuously changed, wherein the surface sector angle ζ at least in sections may be 5 ° to 20 °, preferably 10 °. Such a function may be, for example, a sine function, so that the circular ring sector may be wave-shaped in its radial course. By means of this wave-shaped design of the circular ring sector, even better centering of the stirring element end can be achieved.

Also, the circular ring sector may be inclined by a surface sector angle,, wherein the surface sector angle may increase steadily with a decreasing distance of the storage surface relative to a circular center point or a circular center axis. The area sector Angle ζ can thus be formed continuously relative to the annular center or relative to an outer edge plane formed by an outer edge of the storage rim, for example linearly varied, so that an optionally improved inflow behavior of liquid into the flow tube becomes possible. The area sector angle ζ may be at least 5 ° to 20 °, preferably 10 °, at the outer edge of the storage rim to the outer edge plane.

For example, the storage area may be formed as a sound cup mouth opening. The mouth opening can be designed in the manner of a trumpet-shaped or horn-shaped mouth opening, whereby an optionally laminar flow within the flow tube can be formed, which favors a vibration-free circulation of stirring elements.

In a further advantageous embodiment, the circular ring sector can be tilted by a surface sector angle,, wherein the surface sector angle can be continuously changed with a decreasing distance of the storage surface relative to a circular center corresponding to a nonlinear, preferably a trigonometric function, wherein the surface sector angle ζ at least in sections 5 ° may be up to 20 °, preferably 10 °. The circular ring sector can then be continuously changed in the manner of a shaft extending from the center of the annulus.

Accordingly, the storage area may be formed as a wavy mouth opening. For example, the circular ring sector can form a plurality of sinusoidal waves.

When the pipe wall is formed such that in a section perpendicular to the longitudinal axis of the web above a pipe axis, the length of the pipe wall in the flow direction is greater than below the pipe axis, above the tube axis a longer in the flow direction surface profile is formed as below the flow axis, so that On the agitator ends acting buoyancy is increased and a stabilization of Rührorganenden in the liquid flow during operation is the result.

Moreover, if a surface area of a buoyancy surface formed by an upper part of the pipe wall is inclined at an angle to the direction of flow, a desired buoyancy force can be set at the agitator ends via the choice of the angle of attack as a function of the rotational speed of the stirring rod arrangement. Thus, it is possible, for example, to make a special adjustment of the stirring rod to the viscosity or other material condition of the liquids aufzurührenden by a suitable choice of the angle of attack.

Preferably, the pipe wall is formed as a slender cone, such that a flow inlet cross section of the flow tube is inclined to a flow outlet cross section of the flow tube at a pipe angle, so that thereby influencing the buoyancy force is possible.

If the flow tube at the flow inlet cross-section has the storage edge with the annularly formed storage surface, which adjoins a web surface of the web, depending on the design and size of the storage surface, a desired flow resistance of the stirring element can also be set.

It is particularly advantageous if the storage area is inclined relative to the axis of rotation by a storage surface angle in the direction of flow, so that apart from the area size of the storage area, the flow resistance can be adjusted via the storage area angle.

If in a central web section a buoyancy pocket is formed with a buoyancy surface, which is opposite to the axis of rotation by an inclination angle in the flow direction and with an angle of attack is inclined relative to the direction of flow, the buoyancy or flow resistance behavior of the stirring element can be influenced by a suitable choice of the angle via a corresponding design of the web surface. The stirring rod arrangement according to the invention for an industrial stirrer, in particular for connection to an agitator combinable with a container for holding liquids, the container having in an upper bottom wall a filling opening which can be closed with a lid for filling the container, has a rod-shaped hollow shaft for receiving an agitator shaft formed agitator, wherein the Rührstabanordnung with the Rührorganträger pivotally connected according to the invention Rührorgane has. The stirrers can then take in an operating configuration as a result of rotation of the Rührorganträgers dependent on the rotational speed of the Rührorganträgers pivot position with a trained relative to the axis of rotation δ rotation, such that the free Rührorganenden are arranged in a stirring distance r of the axis of rotation. Further advantageous embodiments of a stirring rod arrangement will become apparent from the dependent claims on claim 1 back.

The stirrers may be pivoted in a mounting configuration with a free Rührorganende against a rotational axis of the Rührorganträgers, between spring means and the Rührorganträger a spring means may be arranged such that the stirring elements are applied in an operating configuration in Fo lge rotation of the Rührorganträgers with centrifugal force and one of the rotational speed of the Rührorganträgers dependent pivotal position with an opposite the axis of rotation formed angle δ occupy, the free Rührorganenden are arranged in a stirring distance r of the rotation onsachse and the increasing with increasing stirring angle spring force counteracts the centrifugal force. Accordingly, a automatic pivoting of the stirring elements take place, such that the agitator ends are pivoted during operation of Rührstabanordnungen due to the force acting on the Rührorganenden centrifugal force and arranged in a stirring distance from the axis of rotation. As a result, it is not only possible to carry out the transfer of the stirring elements from the assembly configuration into the operating configuration without manual intervention. In addition, the desired distance of the stirring element ends can be adjusted by the Rührorganträger on the selection of a suitable speed of the stirring rod. The

Spring force acts as a restoring force, which counteracts the centrifugal force and causes a reset of the Rührorganenden against the axis of rotation with decreasing Rotationsgeschwingigkeit. In particular, residual quantities of liquids which accumulate in a narrowed bottom area of the container can be stirred up in the container, without the risk of a collision of the stirring element ends with the container

Container wall exists. The restoring spring action also has to Fo lge that even agitators made of a material of low density in a liquid of comparable density can not float, but in a desired stirring depth in the liquid are effective. It is particularly advantageous if the free stirrer elements of the stirrers are arranged in the mounting configuration below the pivot bearings formed on the agitator carrier, since thus the stirrers can be pivoted directly against each other in the assembly configuration, so that the for the insertion of the stirring rod assembly through the Einfüllö opening of the container in the container relevant cross-section in the range of mutually pivoted stirrers is as low as possible.

If the spring device is designed as a leg spring, in particular the above-described cross-sectional minimization can still be supported because the leg spring radially outboard of the

Rührorganen with the least possible radial projection is installable. Preferably, one leg of the leg spring is supported above the pivot bearing on the agitator carrier and the other leg of the leg spring is supported on the stirrer.

In a further advantageous embodiment, the Federeinrich- device is designed as a spiral spring, which requires the smallest possible installation space. For example, one end of the coil spring may be arranged on a pivot pin of the pivot bearing and the other end on the agitator.

If the spring device is designed as an electrically conductive connection between the agitator carrier and the stirring element, a reliable electrostatic discharge independent of the design of the pivot bearing can take place from the liquid to be stirred via the stirring elements into the agitator carrier.

It is particularly advantageous when the spring device is made of an electrically conductive plastic, wherein in a particularly preferred embodiment, the Rührstabanordnung total with all its components in plastic, preferably electrically conductive plastic, is executable. The stirring element itself can thus also be manufactured in one piece, for example as an injection molded part, from electrically conductive plastic.

If the spring device is formed from a material extension formed on the stirring element, it is possible to design the spring device together with the stirring element in a single production process, for example in an injection molding process. In addition, an integral connection between the spring device and the stirring element is thereby realized, so that it is possible to dispense with special, separately formed connection devices.

This is also the case for the connection of the spring device to the agitator carrier if the spring device is provided with a free Final form-fitting manner, for example via a latching connection, is connected to the Rührorganträger.

Also, regardless of the arrangement of a spring device on the stirring rod arrangement, it proves to be advantageous in a Rührstaban- order of the type mentioned, when the stirring members are made of electrically conductive plastic.

Preferably, the Rührorganträger has at its upper axial end a connection device for connection to the lid, wherein the connection device has an axial stop for abutment against a formed in the bottom of a cover for receiving a bung stopper plug formed support edge defining a formed in the bottom piercing opening , This makes it possible that the Rührstabanordnung is also connected independently of a combined with the Rührstabanordnung stirrer means of the lid to the container. In this way, the stirring rod arrangement can also be arranged on a container or remain without having to necessarily couple an agitator to the stirring rod arrangement.

The above advantageous embodiment of the Rührstabanordnung with the arranged at its upper axial end connection device thus proves to be independent of the other configuration of the Rührorganträgers, ie in particular regardless of whether a spring means between the Rührorganen and the Rührorganträger is arranged, and in particular independently how the stirrers are designed, as advantageous. If the stop of the above-described connection device is formed by a circlip received in a circlip receptacle of the connection device, this can be carried out particularly easily, on the other hand allows the design of the stopper as a circlip, which rests on the support edge, if necessary, a rotational movement between the Stirring rod assembly and the lid. Preferably, the locking ring is located on the support edge only at a standstill of Rührstabanordnung, whereas the circlip is lifted from the support edge during rotation of the Rührstabanordnung relative to the lid to avoid friction and friction caused by friction and thus possible contamination of the liquid received in the container ,

Preferably, the locking ring receptacle is designed as a separate component which is connected in a form-fitting manner with the agitator carrier in order to form the connection device.

Alternatively, it is also possible, however, for the securing ring receptacle to be formed integrally with the stirring element carrier.

It is particularly preferred if the securing ring receptacle is formed from a material extension formed on the stirring element carrier, which can be produced, for example, by a forming process on the contour of the stirring element carrier.

If the Rührorganträger has at its lower axial end formed as a shaft hub connection means for connecting the Rührorgane, wherein the connection means is positively connected to the Rührorganträger and has for connection to the Rührorganen and training of pivot bearings journals, the Rührorganträger can be designed particularly simple and the Compared with this complex configured connection device can be manufactured separately. The design of the connection device on Rührorganträger can then be done by simply making the positive connection between the connection device and the Rührorganträger.

It is particularly advantageous if the connection device simultaneously serves for connection to the agitator shaft of the agitator. If the connection of the connection device with the agitator shaft is formed positively, even this connection without the aid of tools in a simple manner erfo.

Preferably, the connection device has a first form-locking connection device for transmitting the torque of the agitator shaft to the stirring elements and a second connection device for axial securing of the connection device on the agitator shaft, so that not only a secure transmission of the torque from the agitator shaft to the Rührstabanordnung by a formschlüssig- ge connecting means, but beyond also the axial securing of a defined axial relative position between agitator shaft and Rührstabanordnung via a positive connection means takes place.

Preferably, the Rührstabanordnung is formed so that it is connected to the lid and can be used together with the lid as a mounting unit in a filling opening of a container and connectable by means of a connection of the lid with the filling opening of the container with the container, so that one in their composite secured with the container combination of a stirring rod assembly with a container by a simple replacement of the standard on the filling opening of the container arranged lid against a connected as a mounting unit with the stirring rod assembly lid erfo can.

Preferably, to secure the connection of the lid with the Rührstabanordnung and forming a captive composite of the lid with the Rührstabanordnung the lid provided with a plug in the trough of the lid bung, such that the retaining ring in a both sides axially limited ring receiving space designed as a mounting unit Rührstabanordnung recorded. The present invention also relates in particular to a transport and storage container for liquids with a container formed as an inner container made of plastic, which in an upper bottom wall a closable with a lid Einfüllö opening for filling the

5 container and on a front side an outlet connection for connection of an outlet fitting and a two side walls, a rear wall and a front wall of the container interconnecting lower bottom wall for supporting the container on a pallet base of a provided with an outer jacket for receiving the container transit portpalette, wherein the lid of the container is provided with a stirring rod arrangement according to the invention in accordance with the advantageous embodiments explained above.

Nachfo lying the invention is explained in detail with reference to the drawings. Show it:

FIG. 1 shows a longitudinal section through a container which can be used as an inner container for a transport and storage container for liquids with a stirring rod arrangement not in accordance with the invention in a mounting configuration; FIG.

Fig. 2 is a partial view of an upper axial end of in

20 Rührstabanordnung shown with inserted stirring

factory wave;

FIG. 3 shows the stirring rod arrangement shown in FIG. 2 with an axially raised agitator shaft; FIG.

Fig. 4, the Rührsta¬ shown in Fig. 1 in a transport state

25 banordination in enlarged partial section;

5 is an exploded view of another embodiment of the stirring rod assembly not according to the invention; FIG. 6 shows the stirring rod arrangement shown in FIG. 5 in the assembled state; FIG.

FIG. 7 shows an alternative embodiment of a connection device formed on the upper axial end of the stirring rod arrangement; FIG. 8 shows the lower axial end of the stirring rod arrangement shown in FIG. 1 on an enlarged scale with a plurality of stirring elements;

Fig. 9, the arrangement shown in Fig. 8 of stirrers in

a sectional view according to section line IX-IX; FIG. 10 shows the stirrer assembly shown in FIG. 8 in an operating configuration; FIG.

Fig. 11 is a single non-inventive stirring member in

Top view;

FIG. 12 is an isometric view of that shown in FIG. 11. FIG

Stirrer in rear view;

FIG. 13 shows the stirring element illustrated in FIG. 11 in a sectional view according to section line XIII-XIII; FIG.

FIG. 14 shows the stirrer shown in FIG. 11 according to section line XIV-XIV; FIG. Fig. 15 shows another embodiment of a non-inventive

Stirrer in side view;

FIG. 16 shows the stirring element illustrated in FIG. 15 in an isometric view. FIG.

17 shows a first embodiment of a stirring element according to the

Invention in plan view; FIG. 18 shows the stirring element shown in FIG. 17 in a sectional view according to section line XVIII-XVIII; FIG.

FIG. 19 is an isometric view of that shown in FIG. 17. FIG

agitator; FIG. 20 shows a plan view of a second embodiment of a single stirring element according to the invention; FIG.

FIG. 21 shows the stirring element shown in FIG. 20 in a sectional view according to section line XXI-XXI; FIG.

FIG. 22 shows a third embodiment of a single stirring element according to the invention in an isometric view; FIG.

FIG. 23 shows a stirring element end of the stirring element shown in FIG

Cross-section views;

FIG. 24 shows the agitator end of the agitation system shown in FIG

Longitudinal views; Fig. 25 shows a fourth embodiment of a Rührorganendes after the

Invention in longitudinal section view;

Fig. 26 is a cross-sectional view of the agitator end of Fig. 25;

Fig. 27 shows a fifth embodiment of a single agitator according to the invention in an isometric view. Fig. 1 shows a designed as an inner container for a transport and storage container not shown container 20 for receiving liquids. The container 20 then points to a lower bottom wall 21 which serves for support on a pallet base, not shown here, a transport pallet, which is provided with a likewise not shown grid shell which receives the container 20, a front wall 22, two opposite sides - walls 23, 24, a rear wall 25 and one of the lower bottom wall 21 opposite upper bottom wall 26.

The upper bottom wall 26 is provided with a filler neck 27 which can be closed with a cover 28 designed here as a screw cap.

The cover 28 forms in the illustrated embodiment, a component of a stirring rod assembly 29, which as essential components as a hollow shaft of electrically conductive plastic in the present case formed Rührorganträger 30 and a Rührorgananord- tion 3 1, which has three stirrers 32 in the present embodiment , which are connected by means of a shaft 33 with the Rührorganträger 30.

As is apparent, in particular, from a combination of FIGS. 1, 8 and 10, spring devices designed here as torsion springs 34 are provided between the stirring members 32 and the agitator carrier 30, which in the present case are indirectly connected via the shaft hub 33 to the agitator carrier 30, wherein the shaft hub for the positive connection with free leg ends 35 of the leg springs 34 has latching receptacles 36, into which latching projections 37 formed on the leg ends 35 engage. The leg springs 34 are integrally formed in the present case, the stirring members 32, wherein in the case of the present embodiment, a cohesive connection of the leg springs 34 is formed on the stirring members 32 characterized in that the stirring members 32 are made together with the torsion springs 34 in an injection molding. In the prestressed state, the torsion springs are S-shaped.

The torsion springs 34 are formed as the stirring members 32 and the shaft hub 33 in accordance with the Rührorganträger 30 of an electrically conductive plastic material. In Figs. 1 and 8, the stirring rod assembly is shown in a mounting configuration in which no rotation of the Rührorganträgers 30 by means of a shaft hub 33 with the Rührorganträger 30 rotationally rigidly connected agitator shaft 38 takes place, as shown in Fig. 2, from above in the agitator carrier 30 is inserted and with a shaft journal 39 shown in Fig. 5, formed at the lower axial end of the agitator shaft 38 in the illustrated in Fig. 9, formed in the shaft hub 33 shaft journal receptacle 40 is inserted. For axial securing of the torque transmitting connection between see the agitator shaft 38 and the shaft hub 33, the shaft journal receptacle 40 is equipped with locking legs 41 which engage in not shown detent receptacles on the shaft journal 39.

As shown in particular a combination of FIGS. 9 and 10, the stirring members 32 are formed here with bearing eyes 42 designed as a bearing eye for forming a pivot bearing 43 in each case on a shaft hub 33 formed on the pivot pin 44. The axial securing of the bearing ends 42 on the pivot pin 44 via a positive connection, such that a formed on the bearing ends 42 locking collar 45 after positioning of the stirring members 32 on the

Pivot pin 44 behind a locking collar 46 of the pivot pin engages.

As is made clear by a comparison of FIGS. 8 and 10, in an operating configuration of the stirring rod arrangement 29, in which a rotation of the agitator carrier 30 takes place about a rotation axis 47 as a result of a rotary drive of the agitator shaft 38 coupled to the agitator carrier 30 via the shaft hub 33, the stirrers 32 counter to the restoring spring force of the torsion springs 34 in a dependent of the rotational speed of the agitator 30 pivot position transferred with an opposite the axis of rotation 47 formed stirring angle δ such that Stirring 48 are arranged in a stirring distance r of the rotation axis 47, which is proportional to stirring angle δ or the rotational speed of the agitator shaft 38 is.

As shown particularly by a combination of FIGS. 9, 11 and 13, the stirring element ends 48 are formed with a flow tube which is provided with an annular storage surface 5 1 at its flow inlet cross section 53, that is to say its side facing the stirring direction 50. The storage area 5 1 is inclined at a storage surface angle β with respect to the axis of rotation 47 in the direction of flow 50. The flow tube 49 has a tube wall 52, which is designed as a slender cone, such that the flow inlet cross section 53 is inclined to a flow outlet cross section 54 of the flow tube 49 at a tube angle γ. Where, as shown in FIG. 13, in a section perpendicular to a longitudinal axis 55 (FIG. 11) of a web 56 connecting the bearing end 42 of the stirring element 32 to the stirring element end 48, the length L i of the tube wall 52 in FIG Flow direction 50 is greater than the length L _{2 of} the pipe wall 52 below the flow axis 57th

As further shown in FIG. 13, a surface base 58 of a concave lifting surface 60 formed by an upper part 59 of the tube wall 52 is inclined at an angle α to the direction of flow 50.

FIGS. 15 and 16 show a stirring element 82 which, in contrast to the stirring element 32 shown in particular in FIGS. 13 and 14, has a stirring element end 83 which, in contrast to FIG

Rührorganende 48 of the stirring member 82 is provided with a storage surface 84 which is composed of a flat surface 85 with formed on the peripheral edge of the storage surface 84 surface segments 86 and 87, wherein the surface segments 86, 87 in the present case against the direction of flow 50 relative to the flat surface portion 85th in each case are inclined by a surface segment angle ß i or ß ₂ . As particularly shown in FIG. 16, the surface segments 86, 87 are formed as ring segments, wherein in each case an outer edge 88 of the surface segments 86, 87 by the peripheral edge of the storage surface 84 and a connecting edge 89 of the surface segments 86, 87 in the transition to

Part surface 85 tangential to the flow inlet cross section 53 of the

Flow tube 49 of the Rührorganendes 83 extends, in the present case, the connection edges 89 parallel to each other.

The two surface segments are flat in the case of the illustrated embodiment and also have in the present case a matching size.

The agitator 82 shown in FIGS. 15 and 16 is identical to the stirring member 32 shown in FIGS. 13 and 14, except for the agitator end 83, which has the storage surface 84 instead of the storage surface 5 1, so that matching components of the Stirrer 82 corresponding corresponding reference numerals.

As shown particularly by a combination of FIGS. 11 and 14, a buoyancy pocket 61 is formed in a middle web portion of the web 56, such that starting from a substantially straight leading edge 62 of the web 56 by the inclination angle ε relative to the rotation axis 47 and an angle of attack a ₂ with respect to the direction of flow 50 inclined lifting surface 63 is formed, which is lowered over obliquely to the lifting surface 63 employees flanks 64, 65 relative to the adjacent web surface 66. As shown in particular in FIGS. 4 to 7, the agitator carrier 30 of the stirring rod assembly 29 is provided at its upper axial end with connecting devices 67, 68 and 69 shown here in three different embodiments, which in differently formed securing receptacles 70, 71, 72 in the record this case coincident trained locking ring 73. Figs. 4 and 6 show the Connecting devices 67 and 68 in the transport state of the stirring rod assembly 29. As shown in particular in the connection device 68 shown in a partial sectional view in Fig. 5, the connection device 68 is used to connect the Rührorganträgers 30 of the stirring rod assembly 29 with the cover 28. For this purpose, the in Figs 5 and 6, a stirring receptacle 7 formed as a sleeve and welded to the upper axial end of the agitator carrier 30. For assembly, the upper axial end of the Rührorganträgers 30 is guided with the formed thereon securing receptacle 71 from below through a formed in the cover 28 through-hole 74, so subsequently introduced from above the locking ring 73 in a lid for receiving a bung plug 75 formed plug recess 76 and on the fuse holder 7 1, which has a limited by two gutters 77 receiving groove 78, can be snapped. This results in a relative arrangement between the cover 28 and the connecting device 68, in which the locking ring 73 rests against a in the bottom of the lid 28 Durchsteckö the opening limiting support edge 79, so that the locking ring 73 forms an axial stop against the support edge 79. Now, from the top of the bung stopper 75 into the plug well 76 of

Screwed lid 28, so defines a lower edge 80 of the bung plug 75 together with the support edge 79 of the lid 28 a ring receiving space 8 1, in which the retaining ring can perform limited or substantially no axial movement, so that a secure connection between the lid 28 and the stirring element carrier 30 is formed.

In this way, the container 20 can also be combined with a stirring rod assembly 29 independently of the installation of an agitator. When a stirrer is connected to the stir bar assembly 29 so as to agitate a liquid received in the container, it is sufficient to remove the bung plug 75 from the plug well 76 to remove the lid 28 and the agitator shaft 38 from above into the Rührorganträger 30 and to couple with this. In this case, the agitator can be placed in the usual way on the container 20 and a support structure connected to the outer shell of the container 20 and connected thereto. Preferably, there is a slight axial lifting of the Rührorganträgers 30 from the container 20, as shown by way of example in Fig. 3, to prevent a contact contact between the locking ring 73 and the support edge 79 of the lid 28 during a rotary drive of the Rührorganträgers 30 by means of the agitator shaft 38 and thus to avoid the formation of a possibly contaminating the liquid contact wear.

A synopsis of FIGS. 17 to 19 shows a first embodiment of a stirring element 90 according to the invention having a bearing end 91 and a stirring element end 94 connected to the bearing end 91 via a web 92 and having a flow tube 93. The stirring element 90 is provided with a rod-shaped stirring element carrier connectable here Rührstabanordnung not shown. The flow tube 93 has a tube wall 128, wherein the flow tube 93 at its flow inlet cross section 98 has an annularly shaped storage surface 95, and wherein the storage surface 95 has at least one circular sector 96 which is inclined relative to an inflow plane 97 of the flow inlet cross section 98. In contrast to the stirring elements described in FIGS. 1 to 16, the stirring element 90 has the circular ring sector 96 at the annular area 96, which faces the inflow plane 97 of the flow inlet cross section 98 of the flow tube 93 by one in the area of a surface sector 99 of the circular ring sector 96 constant surface sector angle ζ of 10 ° is inclined. The area sector 99 of the storage area 95 thus formed is consequently inclined relative to a flat partial area 1 00 of the storage area 95 by this constant area sector angle ζ. The partial surface 100 connects directly to the web 92. The area sector 99 extends with respect to a circular ring center 1 01 of the congestion surfaces 95 over 1 80 °. The circular ring sector 96 comprises in addition to the area sector 99 (with the constant area sector angle ζ) two intermediate sectors 200, 201, wherein in each of the intermediate sectors the surface inclination angle ζ in the circumferential direction of 0 ° (adjacent to the partial area 100) is approximately linear to approximately 10 ° (adjacent to the area sector 99) increases. The two intermediate sectors 200, 201 extend in the circumferential direction in each case by approximately 45 °, ie in total by 90 °.

Figs. 20 and 21 show a second embodiment of a stirring member 102 according to the invention. In particular, in contrast to the agitator described in FIGS. 17 to 19 in the agitator 1 02, in contrast to the agitator shown in FIGS. 17 to 19, a circular ring sector 103 is formed so that relative to a center of annulus 1 04 over 360 ° of a storage area 105 extends. The circular ring sector 103 is therefore designed as a cone 106. Again, the inclined surface sector angle ζ is constant and in the circumferential direction and in the radial direction, in each case based on the circular center point 104th

A comparison of FIGS. 22 to 24 shows a third embodiment of a stirring element 107 according to the invention, wherein, in contrast to the stirring element described in FIGS. 17 to 19, a stirring element end 108 with a trumpet-shaped storage surface 109 is formed in the stirring element 107. Starting from an outer edge 125 and with reference to an outer edge plane 126 of the storage area 1 09, the area sector angle ζ increases steadily linearly at a reduced distance relative to a circular center axis 127 or an annular center of the storage area 109. The storage surface 109 forms a sound cup mouth opening 1 10 with a surface sector angle ζ of at least 10 °. The storage area 109 merges into a flow tube 11. An annulus 1 12 of the storage surface 109 is inclined by an angle Ω relative to a flow direction 1 13 of the flow tube 1 1 1. A tube wall 129 of the flow tube 1 1 1 thus extends substantially in the direction of flow or is inclined at an angle Ω in the direction of flow.

FIGS. 25 and 26 show a stirrer end 1 14 of a fourth exemplary embodiment of an inventive stirrer 1 15 shown here in sections with a flow tube 16 and an annular surface 17. The stirrer 1 15 or the stowage surface 11 is in FIG Difference to the in Figs. 17 to 19

described impeller with respect to a circular center axis 1 1 8 and a circular ring center 1 1 8 of the storage area 1 17 formed according to a sine function continuous corrugated. Thus, the storage area 1 forms 17 concentric wave crests 1 19 and troughs 120. Starting from an outer edge 128 and with respect to an outer edge plane 129 of the storage surface 17, the area sector angle ζ increases and decreases continuously with reduced distance relative to the circular center axis 1 1 8. The surface sector angle ζ is therefore continuously changed with a decreasing distance of the storage surface 1 17 relative to the circular center of the ring 1 1 8 according to a non-linear trigonometric function.

FIG. 27 shows a further stirring element 121 according to the invention in an embodiment in which, in contrast to the stirring element described in FIGS. 17 to 19, a storage area 122 is inclined and an inclination or a surface sector angle ζ of 10 ° which is not marked here along the storage surface 122 according to a sine function continuously changed so that the storage surface 122 forms a waveform in the radial direction. The storage area 122 thus likewise has peaks 123 and wave troughs 124. Accordingly, the area sector angle ζ is continuously changed along the storage area 122 or a circular ring sector corresponding to a non-linear trigonometric function.

Claims

claims

Stirring device (90, 102, 107, 115, 121) for an industrial stirrer, in particular for a stirrer bar arrangement (29) for connection to an agitator combinable with a container (20) for receiving liquids, the container being arranged in an upper bottom wall (26). a closing with a lid (28) closable filling opening for filling the container, wherein the stirring member with a rod-shaped Rührorganträger (30) of the Rührstabanordnung is connectable, wherein the Rührorgan a bearing end (91) and via a web (92) with the bearing end connected, with a flow tube (93, 111, 116) formed Rührorganende (94, 108, 114), wherein the flow tube has a pipe wall (128, 129), characterized

in that the flow tube has at its flow inlet cross section (98) an annular storage surface (95, 105, 109, 117, 122), wherein the storage surface has at least one annular sector (96, 103) which is inclined with respect to an inflow plane (97) of the flow inlet cross section ,

Stirring element according to claim 1, characterized,

in that the inclined circular ring sector (96, 103) extends over at least 90 °, preferably at least 180 °, particularly preferably at least 270 °, of the storage area (95, 105, 109, 117, 122) relative to a circular center point (101, 104, 118) ,

3. agitator according to claim 2,

characterized,

in that the storage area (95) has at least one area sector (99) which is inclined relative to a planar partial area (100) of the storage area by a surface sector angle,, the area sector angle ζ being 5 ° to 20 °, preferably 10 °.

4. agitator according to claim 1 or 2,

characterized,

that the inclined circular sector (103) extends relative to a circular center of the ring (101, 104, 118, 127) over 360 ° of the storage area (105, 109, 117, 122).

5. stirring element according to one of the preceding claims,

characterized,

in that the circular sector (96, 103) is inclined by a surface sector angle ζ, the surface sector angle being constant.

6. agitator according to claim 2 or 4,

characterized,

in that the circular sector is inclined by a surface sector angle ζ, the surface sector angle along the circular ring sector being continuously changed in accordance with a non-linear, preferably a trigonometric function.

7. agitator according to claim 2 or 4,

characterized,

in that the circular sector is inclined by a surface sector angle ζ, wherein the area sector angle decreases with a decreasing distance of the storage surface (109) relative to a center of the circular ring

(127) increases steadily.

Agitator according to claim 7,

characterized,

the storage area (109) is designed as a sound-beaker-shaped mouth opening (110).

Stirring element according to claim 2 or 4,

characterized,

in that the circular sector is inclined by a surface sector angle,, wherein the surface sector angle is continuously changed with a decreasing distance of the storage surface (117) relative to a circular center (118) corresponding to a non-linear, preferably a trigonometric function.

10. agitator according to claim 9,

characterized,

the storage area (122) is formed as a wave-shaped mouth opening.

11. Stirring rod assembly for an industrial stirrer, in particular for

Connection to an agitator combinable with a container (20) for receiving liquids, the container having in an upper bottom wall (26) a filling opening for filling the container which can be closed by a lid (28), the stirring rod arrangement being a rod-shaped hollow shaft Having an agitator shaft (38) formed Rührorganträger (30), characterized,

in that the stirring rod arrangement has stirring elements (32, 82) pivotably connected to the stirring element carrier according to one of the preceding claims.

12. stir bar arrangement according to claim 11,

characterized,

in that the stirring elements (90, 102, 107, 115, 121) are pivoted in a mounting configuration with a free stirrer element end (48, 83) against a rotation axis (47) of the stirrer carrier, wherein between the stirrer elements (90, 102, 107, 115, 121) and the Rührorganträger a spring means is arranged, such that the stirring elements are acted upon in an operating configuration due to rotation of the Rührorganträgers with centrifugal force and a dependent on the rotational speed of the Rührorganträgers pivot position with a trained relative to the axis of rotation δ δ occupy, said free Rührorganenden are arranged in a stirring distance r from the axis of rotation and counteracts with increasing stirring angle increasing spring force of the centrifugal force.

13. stir bar arrangement according to claim 12,

characterized,

in that the free stirrer element ends (94, 108, 114) of the stirrer elements (90, 102, 107, 115, 121) are arranged in the mounting configuration below pivot bearings (43) formed on the stirrer carrier (30).

14. stir bar arrangement according to claim 12 or 13,

characterized,

that the spring device is designed as a leg spring.

15. Transport and storage container for liquids with a designed as an inner container container (20) made of plastic, in an upper bottom wall (26) with a lid (28) closable filling opening for filling the container and on a front side a 5 outlet connection for connection an outlet fitting and a bottom wall (21) connecting two side walls (23, 24), a back wall (25) and a front wall (22) of the container for supporting the container on a pallet base of a transit provided with an outer jacket for receiving the container ) port palette,

characterized,

in that the lid is provided with a stirring rod arrangement according to one of claims 11 to 14.