DE2360920A1 - RUHRWERKSMÜHLE - Google Patents

Description

Agitator mill

The invention relates to a device for uniform production i supply of finely divided particles and for uniform distribution 1 j these particles in a liquid carrier. -:

The invention improves on that described in US Pat. No. 3,653,6oo Contraption. Systems of this type can have different sizes

sen, ζ.B .- ^ 2 liter volume for laboratory use up to t

I use very large mixing tanks. There have already been built plants, ¹ j where the mixing vessel has a capacity of more than tern M-oo i Li. With such large systems, the accessibility of the j

j - ". im;

j system when replacing parts when removing the ^ container; end product remaining after the workflow and looks: ι borrowed the removal of the dispersant used made difficult. \

In US Pat. No. 3,653,6oo, for example, a rotatable separator is shown, ' ¹ -. - ■ - - ■ -. ■■■■ - '. . - 2 - i

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on the outside of which a filter screen is arranged. These screens must be removed either for cleaning or for replacement. In the case of small systems, this is not a problem because the rotatable separator can be easily removed from the top of the container together with the associated shaft having an impact body. In larger systems with a capacity of 400 liters, for example, there are considerable problems due to the size and weight of the parts. Nevertheless, the removal and replacement of the filter screen should be possible in a simple manner. This is essentially made possible by a hand hole located next to the separator in the mixing container and by dividing the filter screen into two halves, which can be easily installed and removed.

Another problem encountered especially in larger plants problem regarding the accessibility relates to the processed product in a ^ oo liter system, eg, in which the outlet for the product located at the top of the plant, remain substantially ^ oo liter worked product after Workflow in the plant. In order to remove this product, a drain opening with .einem sieve is provided at the bottom of the mixing container, which can be closed with a drain plug or with an associated valve.

Another problem with large systems is accessibility relates to the dispersant, such as metal shot. From time to time the dispersant must be replaced. Since the dormant Mixing container is about half full with dispersant, obviously prepares the removal of this dispersant.

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difficulties. To solve this problem is a second one
Outlet provided in the mixing container from which the meal is discharged
can be. ■

Therefore, the invention is based on the object of a rotatable
Create a separator with a filter screen that is easily accessible
and. removed from the separator and thus from the interior of the container
weraen.

Furthermore, the separator itself should be easily accessible and it
AblaiS possibilities are to be created both for the product and for the dispersion medium from the container. '

The invention is now to an exemplary embodiment and with reference ^to: explained in more detail accompanying .Figuren. It represents 4 - \

Fig. 1 is a partial section through the embodiment according to the invention

. leadership style; ₍

ι Fig. 2 is a view of the filter screen?., For the separator; i

Fig. 3 is a plan view of the filter screen along the line ':

■ I

3-3 of Figure 1; . '

Fig. 4 is a plan view of the bottom of the container along the line

Line i + -4 of Figure 1; ! j ".". '.

[Fig. 5 shows an enlarged section of the upper part of the loading. !

\ holder in Fig.l; and

ι .Fig. 6 shows a section along the line 6-6 of FIG. 5. j

ι -

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In Fig. 1 an agitator mill Io according to the invention is shown. The agitator mill Io is essentially the same as the one described in U3-P3 3 6b3 boo and has a cylindrical container 12, a rotating agitator shaft IM, a drive unit Io for driving the Ivelle 14, menrere scalag bodies or Rührkorper 18 on aer shaft 14, and a rotatable separator 2o connected to the shaft 14. The Benälter ¹ 12 and the drive unit 16 [are usually arranged on a support frame 21st A pump 22 is assigned to the mill in order to introduce premixed material into the container 12 for processing. Radially at a distance from the container 12, a ring 24 is provided, which forms a chamber 26 with the container. A medium serving for temperature control can be passed through this with the aid of inlet and outlet connections 28 and 3o at the upper and lower ends of the chamber 26; the container is partially filled with a dispersion medium 29, for example steel shot. However, other dispersion materials can also be used in the same way. If steel shot is used, the container is preferably only about half full. In the embodiment shown, the container 12 is closed at both its upper and its lower end. The material to be treated can be pumped in by the pump 22 via a line 33 through an inlet 31 which is located at the lower end of the container. An outlet is at the top of the container. The upper end of the container 12 is closed with a cover plate 32. The cover plate can be manufactured in one piece with the housing 34 carrying the shaft. You can use suitable devices, for example init

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can be fastened to the container 12 by means of bolts 36 and are designed in this way may be that they put the top closure for the container around +

giving, cylindrical chamber 26 represents. The shaft 14 is in herf

in an axially extending bearing housing 34; stored by means of upper and lower bearings (not shown). Seals (not shown): are on shaft 14 below the arranged lower warehouse to prevent the processed product from reaching the warehouse. The sales 4o for the product is in! bearing housing 34 is provided below the seals.

The drive unit 16 can consist of a variable-speed motor 42 exist ,, which via a belt assembly 43 with the 'Wave 14 is in communication. By means of an adjustable control-45, the tension of the belt on the pulley is changed to to be able to bring about an additional speed control.

• A separator 2o consists of an annular body 5o on which 'An itfabteil 52 with a bore 54 for the shaft 14 is attached is. Fasten one or more set screws 5 6 in the hub 5 2 the separator 2o on the shaft. A plurality of transversely extending and circumferentially spaced openings or passages 58 are formed in the wall of the separator. An enlarged Bore section 6o communicates with the openings -5 8 and forms together with the shaft 14 a chamber 62, of which the material penetrates upwards to an outlet chamber 64. ι

'A counterbore 66 in the upper part of the separator forms a ' ■■ ". ■ - ■ - -6 -

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-D-

S it ζ for a surface seal 68 that rotates with the shaft 14 and with the separator 2 ο. The rotating surface seal 68 interacts with a stationary surface seal 7 ο which is arranged on a stationary housing and spring system 72, Λα-ό in turn is mounted in a bore 74 formed in a stationary Dicntungsouchse 7ö. The sealing joint is now attached to the cover plate 32.

An annular j axially extending filter screen 3o is on Outer circumference of the separator 2o arranged. It can be through an annular Flange body 82 be held, but which the Ilabe 5 2 and which is governed by a pair of S-'Iuttern 84 and 8 6 will. The nuts are screwed onto the Habe-52.

A circumferentially extending groove 94 is provided on the lower side 90 of a radially extending flange 92 formed on the upper part of the hub 52. A second groove 94 extending circumferentially is on the upper side 96 of the flange body 32 The upper and lower edges of the filter screen 8o are inserted into the vJiien 88 and 94, the nut 84 clamping the filter screen between the flanges 9 2 and 8 2.

The filter sieve 8o prevents the dispersant from entering the 'Passages 58 enters and reaches outlet 4o. From time to time it is necessary to replace or repair the filter screen.

From the figures it can be seen that, if the filter screen is made of e'nain

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There is a single ring for access to the filter screen and its AusDau the entire VJeHe 'with the impact bodies from the container must be expanded. To avoid this, especially in large systems, a split filter sieve is provided, i.e. a filter sieve, that consists of two separate semicircular sieve segments loo and Io2, as shown in FIGS. 2 and '3 is shown. Included the opposite edges are looa, Io2a, Ioob and Io2b of the two sieve segments held together by closure bodies Io4 and Io6, aie preferably an im. essential I-shaped cross-section and are made of "isoprene. The edges of the screens are in the opposite grooves Io4a, Io4b, loöa and loöb fitted the closure body. To gain access to the separator and to get the Filtersieo 8o with such an arrangement, You could of course have the supporting housing around the shaft after loosening it Lift the cover plate 32 a little upwards out of the container. But in a preferred embodiment, even this can be avoided. For this purpose, it is possible in the wall of the container near the separator 2o a hand hole ilo for access to the filter sieve So intended. The handlocn is circular, and necessarily extends through both the wall of the container 12 and the shell 24. A transverse cylinder 112 extends into the container and is attached to both the container wall and the dumbbell 24-. A cover 114 closes the hand hole llo. The lid consists of a plate 116, a cylindrical extension 118 welded to the cover and a curved, knocking-off part 12o, which on the cylindrical! ; Extension 118 is welded. The radius of curvature of the, part 12o- j

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¹ corresponds to that of the container wall, as shown in particular from 'Fig. 6 can be seen. The cylindrical extension 118 is fitted in the cylinder 112 and slidable. A seal is provided between the cylinder 112 and the cylindrical extension 118 which prevents the product from seeping out of the container. Such a seal is -here., For example as a seal-

ring 122 is shown attached to the outer wall of the cylindrical Eort-j set 118 is arranged. !

The cover is in the cylinder 112 e.g. by several nuts and bolts 124 releasably attached, the bolts on the cylinder 112-attached- ' are welded. This makes the filter sieve and the separator easily accessible «once the lid for the hand hole has been removed you only need to reach into the container and loosen the nuts 84 and 86 to pull the flange body 82 downwards to be able to. The closure body via Io4 and Io6 for the closure or for the seal on the edges of the screen halves can then easily are removed, and thus the sieve segments.

For cleaning and removing any product left behind an outlet 13o is provided at the bottom of the container. An outlet valve 132 or just a drain plug can be used for this outlet be provided for sealing the opening. The drain valve 132 may be located close to the outlet or in one of the Outlet 13o leading away line are located. It is of course necessary to provide a screen 134 over the outlet to allow dispersant is held back. The sieve can be made from the same sieve material

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rial, which is used on the separator 2ö . The outlet 13o prevents the container from having to be "tilted" somehow in order to remove the product left behind at the end of a work cycle.

To make maintenance and cleaning even easier, the j

A filter-free outlet 136 is also provided at the bottom of the container, j

ι through which the dispersant, e.g. metal shot, can escape.

"While removing the dispersant in a small Agitator mill as it is used in the laboratory, no 'significant Poses a problem, this is the case with larger systems. As is known, the shot was removed by tilting the container. A plug, valve or other can be used for the outlet ! Appropriate facilities must be provided.

! The features mentioned convey a comfortable handling and;

; ■ ■ i

jAccessibility to facility for cleaning and repair; ^f

jkönnen, for which the removal of the filter screen from the interior of the ^;

.-Agitator mill, the removal of the remaining end product;

! and the removal of the dispersant for testing or er- j count now.

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Claims (8)

Dr. Ing. H.. ^Λ .or · ingratitude Dipl. Inc.H.HaL-k- ^ i-:> y ₅ . ■; ■. ■. Schmitr Dipl. Inc. E. Gre: [fs - l: - ■ = ig. v /. Delusional 8 i.iii.ächc · .:: ., ; · .: .z ^: \ ^ iiie 25 Telephone 538 0586 George R. Schold
9o8 - 2nd Street, N. St. Petersburg, Florida 337o2, USA 29. iioveiiiuer 1973 Attorney File M-287S Claims l) Device for deagglomerating and dispersing in solid particles present in agglomerated form in a liquid carrier using a mixing container in which the particles are exposed to the action of a dispersant during their flow through the interior of the container and a centrifugal and agitation are subjected, the relatively heavier dispersant being thrown outwards and from the Flow path of the relatively lighter product or the processed liquid mixture is separated, and wherein a Separator for the dispersant is arranged inside the mixing container in the flow path and has devices, which guide the processed product in and through the separator in such a way that the path covered by the product opposite to that given by normal centrifugal force Is directed away, characterized in that the separa- - II - I 409824/0852 gate (2o) is arranged around a shaft (14) and one of several has separable segments (Ioö, lo2) existing filter screen (8o), which can be removed from the mixing container (12) without disturbing the shaft. 2. Apparatus according to claim 1, characterized gekennzeicnnet that one; Lateral opening (llo) in the container (12) for access to the filter sieve (8o) and intended for its removal from the container (12) is. 3. Apparatus according to claim 1 or 2, characterized in that the separator (2o) together with the. separable filter segments (Ioo ~, lo2). the shaft is attached. 4. Apparatus according to claim 1, characterized in .that on the floor . that of the container (12) has a drain opening (13o) for the fluid is provided and that the dispensing agent is returned holding and this opening covering filter element '(134) is provided. ö. Device according to claim 4, characterized in that in the ground of the container an opening (136) for 'the dispersant is provided. 409824/0852