EP0155527B1 - Dispositif pour le nettoyage des semoules - Google Patents

Dispositif pour le nettoyage des semoules Download PDF

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Publication number
EP0155527B1
EP0155527B1 EP85101898A EP85101898A EP0155527B1 EP 0155527 B1 EP0155527 B1 EP 0155527B1 EP 85101898 A EP85101898 A EP 85101898A EP 85101898 A EP85101898 A EP 85101898A EP 0155527 B1 EP0155527 B1 EP 0155527B1
Authority
EP
European Patent Office
Prior art keywords
stand
cleaning box
cleaning
support
foot
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP85101898A
Other languages
German (de)
English (en)
Other versions
EP0155527A3 (en
EP0155527A2 (fr
Inventor
Roman Mueller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Buehler AG
Original Assignee
Buehler AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Buehler AG filed Critical Buehler AG
Priority to AT85101898T priority Critical patent/ATE36817T1/de
Publication of EP0155527A2 publication Critical patent/EP0155527A2/fr
Publication of EP0155527A3 publication Critical patent/EP0155527A3/de
Application granted granted Critical
Publication of EP0155527B1 publication Critical patent/EP0155527B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
    • B07B4/08—Separating solids from solids by subjecting their mixture to gas currents while the mixtures are supported by sieves, screens, or like mechanical elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B2201/00—Details applicable to machines for screening using sieves or gratings
    • B07B2201/04—Multiple deck screening devices comprising one or more superimposed screens

Definitions

  • the invention relates to a device for cleaning semolina, which comprises: (a) a stand with a vertical central support; (b) a plurality of sieve layers arranged one above the other, which can be set into vibration by at least one unbalance exciter, each with an inlet or outlet arranged on one end side for the product inlet or sieve rejection, the sieve layers being designed as a cleaning box and being mounted on the stand so that they can vibrate; (c) collecting devices for the sieve diarrhea and (d) an air duct which can be adjusted by means of adjusting flaps through the sieve layers via an upper air distribution space into a suction collecting duct.
  • Such devices for cleaning semolina are special machines that are used almost exclusively in grain milling. They are used to sort out semolina and dun and occasionally maize semolina from the product fed to the machine.
  • the main function of these machines is to sort the semolina of the largest possible granulation range (clean semolina, mixed products, light products, special products such as cooking semolina or similar, germs, etc.).
  • the greatest possible yield of clean semolina should be achieved. Fluctuations in the incoming performance of the product should not have a negative impact on the quality of work, and the respective setting of the machine must not inadvertently change during the work process.
  • a device for cleaning semolina according to the type specified in the preamble of claim 1 is known from US Pat. No. 3,380,585 (SALETE) and from BÜHLER / BÜHLER-MIAG brochure no. MU 18206 D 8303 800 LB, "Semolina cleaning machine PUROSTAR / model MQRE "1983 known.
  • a semolina cleaning machine similar to the generic semolina cleaning machine is also known from AT-B 185 667 (GEBRÜDER BÜHLER).
  • the invention is based on the object of finding a semolina cleaning machine which runs particularly smoothly compared to known semolina cleaning machines, is lightweight and is more accessible.
  • this object is achieved in that in the generic semolina cleaning device mentioned at the outset, the vertical support merges into a foot at the bottom and the cleaning box is mounted so that it can vibrate downward at the foot of the stand and is supported there.
  • a device and a method for separating bulk material mixtures according to the weight of the mixed material components are known.
  • Such a device also has a vibrating body. This is not used for sieving but for separating the products according to the weight. Sieves are therefore not available to separate the goods.
  • the vibrating body in the known device rests on the surface, more precisely on the head of a base.
  • the solution according to the invention initially creates "free space" for easy access by the operator above the sieve boxes, which makes it particularly easy to keep the device itself and its surroundings clean. Since in the solution according to the invention the oscillatable support and mounting of the sieve layers designed as a cleaning box now takes place downward at the foot of the stand, a particularly quiet and vibration-free running of the entire device can be achieved, not least because the stand parts above the stand base for vibration compensation , ie can contribute to vibration damping as a result. In conventional machines, in which the support was provided in the form of suspensions on the housing for the machine, the housing had to absorb the vibrations which occurred, which resulted in a more uneven running.
  • the machine housing can be kept largely free of vibrations, since the vibrations of the cleaning box to be absorbed are derived downwards.
  • the stand has a stand head (11) and a vertical central support connecting it to the stand base, the upper air distribution space of the device being formed by the stand head itself or forming it.
  • the stand preferably has a central support at its front and rear ends.
  • the cleaning box is supported by a spring system, as a result of which the entire oscillating structure is given two additional degrees of freedom for the oscillating movement.
  • the spring system preferably has hollow rubber springs, steel springs or a rubber joint system, which makes it possible to connect the vibration exciter firmly to the cleaning box and still make the direction of action of the vibration exciter adjustable.
  • the cleaning box is expediently designed as an oscillatable structure in the sense of a cantilever chair, whereby it can be supported, again on the two end sides, in an oscillating manner downward on the stand base.
  • a double conveyor trough vibrating in the same direction as the cleaning box is supported on the stand base so as to be capable of swinging independently of it.
  • the cleaning box and the oscillating double conveyor trough are driven by a common unbalance exciter, whereby, again preferably, the cleaning box is firmly connected to the unbalance exciter and the direction of action of the unbalance exciter is adjustable.
  • the swinging double conveyor trough a lever joint from the vibrating unit to be driven by an end support from the cleaning box from the collecting devices can be set in motion by a drive lever and a support, the articulation points of the lever on the end support as are adjustable on the support of the fall arrester for setting the throwing distance.
  • the adjustability of the direction of force of the vibration exciter means that, depending on the choice of the direction of force with regard to the center of gravity of the vibrating unit, the vibrations at the beginning and at the end of the cleaning box can be adjusted in direction and intensity as required.
  • the oscillation deflection can be set independently of the oscillating movement of the cleaning box, although the same imbalance exciter is used to generate the vibrations.
  • Another preferred embodiment of the device according to the invention also consists in the fact that the center supports protrude in height above the cleaning box and merge symmetrically into a stand foot on both end sides, and that the space between the two stand feet is free of immovable, i.e. components that cannot be vibrated. This makes it possible to leave a lateral space for the air supply over the length of the entire device, even on the inside thereof.
  • a resilient element is arranged between the stand and the cleaning box, as a result of which the reaction forces to the device, which result from the vibrating forces, can be absorbed well in the device, since the stand and stand head represent an effective countermeasure to the otherwise vibrating elements.
  • the elastic element can be arranged between the stand foot and the central support of the stand.
  • elastic elements are attached between the center support of the stand and the stand head.
  • the center supports themselves can preferably also be designed as elastic elements, as a result of which particularly quiet and stable operation of the overall device can be achieved.
  • the vibrating forces are derived directly there, the stand being able to be designed for its main function for carrying the various elements. Because both the process of cleaning the semolina and the action of the necessary mechanical forces can be concentrated on their actual working zone, not only can a good quality of work be obtained and the product performance increase compared to conventional semolina cleaning machines, but also the service life of the entire device significantly increase compared to known machines.
  • the vibrating forces can be kept completely away from the air guide elements, so that once the air guide has been set or the corresponding position of the air guide flaps can no longer adjust itself.
  • FIG. 1 in which (as in the other figures) a so-called double machine is shown, which consists of two semolina cleaning machines that are completely separate in terms of working technology, as shown in FIG. 3. These two semolina cleaning machines are arranged on the left and right with respect to a central stand construction.
  • each individual collecting device 4 or 5 has two processes 6 or 7.
  • the sieve layers 3 are each combined to form a cleaning box 8 (FIG. 3), so that each cleaning box 8 is assigned two outlets 2 for the screen rejection and four outlets 6 and 7 for the screen diarrhea in accordance with the illustrated embodiment.
  • Each cleaning box 8 is supported by an end support 12 (FIG.
  • the collecting device 4 is designed as a vibrating conveyor trough, which rests on both end sides on a support 19 mounted in rubber (FIG. 1).
  • the oscillation drive of the collecting device 4 takes place via a lever 20 which connects the oscillating end support 12 to the support 19.
  • the swing stroke of the collecting device 4 can thus be selected or adjusted independently of the swing stroke of the cleaning box 8.
  • the stand 9 carries all non-vibrating components directly, the vibrating elements being mounted above the lower part of the stand.
  • the stand 9 also has a vertical support 21 on each end side (FIG. 3), which merges with an extension into a foot construction at the bottom. According to the illustration in FIG.
  • the vertical support 21 extends a little beyond the uppermost sieve layer and carries a stand head 11, which essentially forms an upper air distribution space 22.
  • This upper air distribution space 22 has an upwardly tapered shape and is divided over its length by bulkheads 23 into sixteen separate air guiding chambers 24.
  • the bulkheads 23, as can be seen from FIG. 1, are brought close to the uppermost sieve layer, the distance being chosen so that it is somewhat larger than the greatest layer thickness of the material that ever occurs.
  • the upper inclined surfaces of the air distribution space 22 have transparent windows 25 over their entire length, so that the flow behavior of the material over the top sieve layer 3 can be controlled with an electric light source from the outside of the device.
  • the stand construction shows the basic structure of the non-vibrating elements of the device (“stand construction”), two different exemplary embodiments being shown in this figure.
  • the one embodiment shown is that an elastic or resilient element 30 is interposed between the stand base 10 and the vertical support 21.
  • the other exemplary embodiment results from the arrangement of an elastic or resilient element 31 between the stand base 10 and the stand head 11.
  • the stand base 21 together with the stand head 11 represents a vibration damping mass for the non-oscillating parts.
  • the stand foot 21 could also be of a lightweight construction and itself embody the resilient element.
  • FIG. 3 Another embodiment, which is particularly advantageous for certain applications, can be seen from FIG. 3.
  • a base 32 which is supported on the stand 10 and which can swing is provided, which has a plurality of depressions 33 along its length, each of which has a longitudinal product flap or chute 34 (FIG. 3) on the inside or the outer collecting device 4 or 5 can be aligned so that the screen rejection, depending on the request, can be derived either into one or into the other collecting device below the sieve layers 3.
  • the number of product longitudinal flaps 34 is preferably selected to be approximately the same size as the corresponding number of air guiding chambers 24.
  • the product flow brings a certain self-cleaning effect in the device: in the prior art, the changeover flaps are mounted directly on the collecting device 4 or 5, whereby a half of the collecting device in question is covered continuously, which leads to the formation of sealed-off dirt corners beneath it can, which in turn can not occur in the invention, since there is no cover there.
  • Yet another noticeable advantage of the device according to the invention is that the sieve diarrhea can be divided very precisely into the desired fractions, because disturbing air flows in the longitudinal direction are virtually eliminated.
  • the vibrator When the semolina cleaning machine shown is started up, the vibrator is switched on, so that the cleaning box 8, the bottom 32 and the collecting devices 4 and 5 carry out the preselected oscillating movement in the longitudinal direction of the device. Likewise, the entire device is placed in a slight negative pressure via a suction collection channel 27 or an aspiration associated therewith. Depending on the separation task, all slides and flaps are provisionally adjusted, after which the product can be fed into inlet 1. The product immediately falls on the top sieve layer 3. Due to the shaking movement which is imprinted on the material, as well as through the sieve layers which are deliberately inclined downwards from the inlet 1 to the outlet 2 and the air flow through the sieve layers 3, the product behaves like a liquid (fluidized ).
  • the central task of the semolina cleaning machine lies in the actual sieving process. So the air flow must not be adjusted so much that the entire product layer could be lifted off the sieve layers. Rather, the air primarily serves the function of loosening up the product and distributing it evenly over the entire surface.
  • the product should be fractionated into coarse, medium and fine size or into cooking size and medium size etc.
  • the first six chutes in the collecting device 4 the subsequent eleven chutes are directed into the collecting device 5.
  • the two sieve passes are finished products that can be delivered to the corresponding storage cells or to the consumers.
  • the screen rejects at the outlets are partially regrinded or crushed and then transferred to a second, appropriately set, semolina cleaning machine.
  • two different processes 6 and 7 can be selected from each collecting device 4 or 5, so that four different fractions can be separated from each cleaning box 8.
  • Fig. 4 the support of the vibrating unit is shown on a spring system 40, which is embodied by a rubber joint 43.
  • the unbalance exciter 14 can, as can be seen in FIG. 1, be rotated about the transverse axis 16, so that the direction of force 41 can optionally be set, as indicated by the arrow 41 '. If the direction of the force action passes through the center of gravity "S" of the vibrating unit (cf. FIG. 4), a uniform vibration of the entire stack of sieves is generally achieved. However, if the direction of force 41 does not run through the center of gravity "S", then - depending on the particular requirements - an actual vibration can be set in the area of the inlet 1 in accordance with the angle a and in the outlet 2 in accordance with the angle ⁇ .
  • the cleaning box 8 is mounted as an actual cantilever on a spring system 40 or a steel spring 42 so that it can vibrate.
  • the unbalance vibrator 14, which is adjustable with respect to the direction of the force action, is fastened to the end support 12 and, by using two vibrators rotating in opposite directions, brings about an essentially purely linear oscillating movement in a manner analogous to that shown in FIGS. 4 and 1.
  • the collecting device 4, 5 is independent of the cleaning box 8 a support 19 mounted to vibrate.
  • the end support 12 is connected to the support 19 via a lever 20, so that the Vibrations of the unit which is supported so that it can oscillate transversely via the spring system 40 can be transmitted via the lever 20 to the collecting device 4, 5.
  • the lever 20 can be attached to the support 19 at different heights x1, x2, ... x6 (cf. FIG. 6). This creates the possibility, starting from the drive of the unbalance vibrator 14 via a correspondingly selected and adjustable lever path, to trigger or force different lateral oscillation deflections of the collecting device 4, 5, thereby obtaining a surprisingly simple oscillating structure.
  • the sieve stack performs a short-stroke oscillation for the "sieving" task, while the collecting device carries out a long-stroke oscillating throwing movement in accordance with the function of an oscillating conveyor trough, which is supported by the correct articulation of the lever 20 on the support 19.
  • the work result of this combined cantilever lever arm has proven to be surprisingly good.

Claims (11)

1. Dispositif pour le nettoyage des semoules présentant:
a) un bâti (9) muni d'un support vertical (21),
b) plusieurs couches de tamis (3) disposées les unes au-dessus des autres, aptes à osciller, avec au moins un excentrique à balourd (14), une entrée (1) ou une sortie (2) disposée à une extrémité pour l'entrée du produit ou son évacuation, par exemple pour le refus des tamis, les couches de tamis (3) étant conçues de manière à former une caisse de nettoyage (8) et étant placées sur le bâti de façon à pouvoir osciller,
c) des dispositifs de collecte (4, 5) du produit passant à travers les tamis ainsi que,
d) une conduite d'air réglable par clapets ajustables à travers les couches de tamis (3) sur une chambre supérieure de partage d'air (22) dans un canal collecteur d'aspiration (27) ; caractérisé en ce que
e) le support vertical (21) constitue la partie inférieure du pied (10),
f) la caisse de nettoyage (8) oscillante est placée vers le bas sur le pied (10) du bâti (9) et s'y trouve soutenue.
2. Dispositif selon la revendication 1, caractérisé en ce que le bâti (9) présente une tête de bâti (11) et un moyen de support vertical (21) liant la tête de bâti (11) avec le pied de bâti (10), une chambre supérieure de distribution d'air (22) étant ménagée dans la tête de bâti (11).
3. Dispositif selon la revendication 2 en forme d'une machine double, caractérisé en ce que le bâti (8) présente à chacune des extrémités du dispositif un moyen de support vertical (21).
4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que la caisse de nettoyage (8) prend appui sur des ressorts (40).
5. Dispositif selon la revendication 4, caractérisé en ce que les ressorts (40) sont formés de ressorts creux en caoutchouc (13), de ressorts d'acier (42) ou bien d'articulations en caoutchouc (43).
6. Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que la caisse de nettoyage (8) est liée fermement à l'excentrique à balourd (14) dont la direction de la force d'action (41) est réglable.
7. Dispositif selon l'une des revendications 1 à 6, caractérisé en ce que les moyens de collecte (4, 5) sont mobiles et aptes à osciller sur un appui d'extrémité (12) hors de la caisse de nettoyage (8) au moyen d'un levier d'entraînement (20) et d'un appui (19), de façon que, la rotation du levier (20) soit modifiable par réglage de l'ampleur de sa course.
8. Dispositif selon l'une des revendications 3 à 7, caractérisé en ce que les moyens d'appui (21) s'étendent en hauteur au-dessus de la caisse de nettoyage (8) et passent symétriquement sous les deux extrémités chaque fois dans un pied de bâti (10), et en ce que l'espace entre les deux pieds de bâti (10) est libre de composants montés non- oscillants.
9. Dispositif selon l'une des revendications 3 à 8, caractérisé en ce qu'un double canal transporteur (4, 5), oscillant dans le même sens que la caisse de nettoyage (8), prend appui sur le pied de bâti (10) indépendamment de la caisse de nettoyage (8).
10. Dispositif selon l'une des revendications 1 à 9, caractérisé en ce que la caisse de nettoyage (8) est construite en oscillateur libre.
EP85101898A 1984-03-22 1985-02-21 Dispositif pour le nettoyage des semoules Expired EP0155527B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85101898T ATE36817T1 (de) 1984-03-22 1985-02-21 Vorrichtung zum putzen von griessen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3410573 1984-03-22
DE3410573A DE3410573C2 (de) 1984-03-22 1984-03-22 Vorrichtung zum Putzen von Grießen

Publications (3)

Publication Number Publication Date
EP0155527A2 EP0155527A2 (fr) 1985-09-25
EP0155527A3 EP0155527A3 (en) 1986-02-05
EP0155527B1 true EP0155527B1 (fr) 1988-08-31

Family

ID=6231314

Family Applications (3)

Application Number Title Priority Date Filing Date
EP85101898A Expired EP0155527B1 (fr) 1984-03-22 1985-02-21 Dispositif pour le nettoyage des semoules
EP85101992A Expired EP0155537B1 (fr) 1984-03-22 1985-02-22 Dispositif pour le nettoyage des semoules
EP85102170A Expired - Lifetime EP0155556B1 (fr) 1984-03-22 1985-02-27 Dispositif pour l'aspiration de l'air dans les appareils de blutage ou classement

Family Applications After (2)

Application Number Title Priority Date Filing Date
EP85101992A Expired EP0155537B1 (fr) 1984-03-22 1985-02-22 Dispositif pour le nettoyage des semoules
EP85102170A Expired - Lifetime EP0155556B1 (fr) 1984-03-22 1985-02-27 Dispositif pour l'aspiration de l'air dans les appareils de blutage ou classement

Country Status (8)

Country Link
US (2) US4636305A (fr)
EP (3) EP0155527B1 (fr)
JP (3) JPS60255181A (fr)
KR (1) KR890004600B1 (fr)
AT (3) ATE36817T1 (fr)
DE (4) DE3410573C2 (fr)
ES (1) ES8606797A1 (fr)
SU (1) SU1477238A3 (fr)

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Also Published As

Publication number Publication date
ATE26932T1 (de) 1987-05-15
EP0155556A3 (en) 1987-06-24
SU1477238A3 (ru) 1989-04-30
EP0155527A3 (en) 1986-02-05
EP0155556B1 (fr) 1990-09-05
EP0155537A2 (fr) 1985-09-25
JPH0122827B2 (fr) 1989-04-27
EP0155527A2 (fr) 1985-09-25
DE3410573C2 (de) 1986-03-13
KR890004600B1 (ko) 1989-11-20
JPH0113917B2 (fr) 1989-03-08
DE3410573A1 (de) 1985-10-03
ES541472A0 (es) 1986-05-16
DE3579482D1 (de) 1990-10-11
DE3560153D1 (en) 1987-06-11
KR850006866A (ko) 1985-10-21
EP0155556A2 (fr) 1985-09-25
ATE56158T1 (de) 1990-09-15
EP0155537A3 (en) 1986-02-05
US4806235A (en) 1989-02-21
JPS60220175A (ja) 1985-11-02
JPH0113916B2 (fr) 1989-03-08
EP0155537B1 (fr) 1987-05-06
JPS60255181A (ja) 1985-12-16
JPS60216872A (ja) 1985-10-30
ES8606797A1 (es) 1986-05-16
ATE36817T1 (de) 1988-09-15
DE3564659D1 (en) 1988-10-06
US4636305A (en) 1987-01-13

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