Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
  • B01F27/25—Mixers with both stirrer and drive unit submerged in the material being mixed

Definitions

• the invention relates to a mixing or stirring device for liquid-filled containers, consisting of a circulating device with a propeller arranged on a drive shaft, the circulating device by means of a lifting device along a guide tube on a support that is fixed to the bottom of the container and holds the circulating device in addition to the weight of the circulating device absorbs the dynamic forces generated by the circulating device, is reduced.
• a substantial stabilization of the systems incorporating the guide tube was achieved by DE 43 32 011 A1, in which the guide tube is supported above the support for the circulating device.
• the supports of the guide tube are arranged so that the circulating device can be guided past them when lowering and lifting.
• the device is characterized by the fact that it achieves high strength with little effort for anchoring and thereby permits height adjustment of the support, which may be necessary under certain circumstances.
• Another way is DE 19620 986 C1, which uses a separate hanging device attached to the bottom of the container for the circulating device instead of a structure incorporating the guide tube.
• the lower end of the guide tube is connected to the suspension device here.
• the suspension device is essentially formed by a massive, heavy bearing block, which has a base with guide surfaces on its upper side.
• Guide claws are attached to the circulating device and come into contact with the corresponding guide surfaces with upper and lateral clamping bevels.
• the mutual adaptation of the surfaces that are in contact with each other requires more effort, although an undefined line contact between the corresponding surfaces is to be expected rather than a pronounced surface contact. The consequence of this may be that the bending and torsional forces that arise place stress on the mounting of the cantilever-suspended circulating device.
• a locking tongue on the housing of the circulating device can be provided, which engages in a corresponding recess in the bearing block, whereby a further protection against pendulum movements is to be achieved.
• this securing increases the effort to be made and, moreover, requires a further adjustment of areas in contact with one another.
• the invention has for its object to provide a mixing or stirring device of the type mentioned, the circulating device is arranged on a stable, yet inexpensive support, the device should absorb the forces generated during operation without problems.
• the support is carried by a firmly connected metal construction, which is connected via at least three legs independent of the guide tube to the bottom of the container, the legs being arranged so that they by the Circulation device generated thrust are subjected to pressure and train, and wherein on the housing of the circulation device on both sides at the height of the central axis of the drive shaft projections are arranged, which are supported during operation of the circulation device on counter surfaces which are arranged on the support. It is particularly useful if the legs supporting the support are attached to the support in the vicinity of the projections and the counter surfaces.
• the support is formed by a U-shaped part into which the housing of the circulating device is immersed during operation, approximately up to the central axis of the drive shaft.
• This also allows the support to be formed by a sheet metal part equipped with U-shaped bent legs. Easier handling when lowering the rolling device results if the legs or walls of the support are equipped at their upper end with funnel-like guide surfaces.
• a sheet metal part for the support also allows the counter surfaces provided on the support to be produced with little effort by bending these surfaces out of the legs of the U-shaped sheet metal part and thus forming sub-areas which are essentially perpendicular to the legs.
• An advantage of attaching the support independently of the guide tube is that the guide tube is relieved of the forces generated during operation.
• this attachment takes place below the support and / or in the floor area on the metal structure supporting the support.
• the attachment made at two points gives the guide tube great stability.
• the load on the metal structure carrying the circulating device is limited to tension (for the legs pointing in the direction of the stirrer) and pressure (for the leg pointing towards the guide tube). A bending or torsional load, which would be harmful for such structures, does not take place.
• Figure 1 is a side view of a stirring device according to the invention.
• FIG. 2 shows the front view of the metal construction of FIG. 1 carrying the circulating device
• FIGS. 1 and 2 shows a sectional illustration of the support of FIGS. 1 and 2 which essentially consists of a sheet metal part bent into a U-shape;
• FIG. 4 shows the front view of the sheet metal part of FIG. 3.
• the stirring device shown in FIGS. 1 and 2 comprises an electric motor-driven circulation device 1, which is equipped with a propeller 2.
• the circulating device 1 is carried by a support 3, which in turn is connected via legs 4, 5 and 6 to the bottom 7 of the container or basin (not shown).
• the sideways spread legs 4 and 5 are formed by rods; the leg 6 pointing in the direction of a guide tube 8 consists of a tube.
• Such a configuration is recommended because the legs 4 and 5 are only subjected to tension and therefore rods fully meet the requirements, while a tube is most suitable for the pressure load exerted on the leg 6.
• the legs 4, 5 and 6 are fastened to the floor 7 with brackets 9 and 10.
• the guide tube 8 is connected to the floor 7 by the bracket 10.
• the guide tube 8 is connected by means of a traverse 9 to the support 3 and thus to the metal construction which supports the support 3 and is essentially formed by the legs 4, 5 and 6.
• the circulating device 1 is to be lowered onto the support 3 with the aid of a guide unit 12 sliding on the guide tube 8 and raised from there.
• the circulating device 1 On its sides, the circulating device 1 has projections in the form of lugs 13, which are arranged at the level of the center line of the circulating device 1. When the circulating device 1 is lowered, the lugs 13 come to rest on counter surfaces 14 of the support 3.
• the circulating device 1 Due to the thrust exerted by the propeller 2 of the circulating device 1 in operation, the circulating device 1 is pressed in the direction of the guide tube 8. The pressure exerted by the lugs 13 is absorbed by the counter surfaces 14 and passed into the metal structure supporting the support 3. The thrust of the propeller 2 is only effective at the level of the center line of the circulating device 1. A folding up of the circulating device 1 is thus avoided.
• the support 3 is formed by a simply designed sheet-metal part which accommodates the housing of the circulating device 1 with two webs 15 and 16 arranged perpendicular to the circulating device 1.
• the in the direction of the propeller 2 web 15 carries the
• the web 15 forms bevels 17 which, together with the bevels 18 on the U-shaped outer part 19 of the support 3, form guide surfaces for the lugs 13 of the sinking circulating device 1 which run in the manner of a funnel.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Mixers Of The Rotary Stirring Type (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=7700063

Family Applications (1)

Country Status (4)

Families Citing this family (2)

Family Cites Families (6)

• 2001
  • 2001-09-24 DE DE10146983A patent/DE10146983A1/de not_active Withdrawn
• 2002
  • 2002-09-13 WO PCT/EP2002/010288 patent/WO2003028870A1/de not_active Application Discontinuation
  • 2002-09-13 PL PL02367710A patent/PL367710A1/pl not_active IP Right Cessation
  • 2002-09-13 EP EP02800083A patent/EP1429863A1/de not_active Withdrawn

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events