EP2691185B1 - Sieb trägerrahmen - Google Patents

Sieb trägerrahmen Download PDF

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Publication number
EP2691185B1
EP2691185B1 EP12710329.9A EP12710329A EP2691185B1 EP 2691185 B1 EP2691185 B1 EP 2691185B1 EP 12710329 A EP12710329 A EP 12710329A EP 2691185 B1 EP2691185 B1 EP 2691185B1
Authority
EP
European Patent Office
Prior art keywords
sections
flour
frame
base
sieve carrier
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.)
Not-in-force
Application number
EP12710329.9A
Other languages
English (en)
French (fr)
Other versions
EP2691185A1 (de
Inventor
Adriano Nalon
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.)
OMAS Srl
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OMAS Srl
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Filing date
Publication date
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Publication of EP2691185A1 publication Critical patent/EP2691185A1/de
Application granted granted Critical
Publication of EP2691185B1 publication Critical patent/EP2691185B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B07B1/4645—Screening surfaces built up of modular elements

Definitions

  • the present patent concerns vibrating sieves for flour, and in particular it concerns a sieve carrier frame.
  • Vibrating sieves which comprise a frame for supporting a plurality of sieves placed on top of one another to form one or more piles, wherein the sieves in higher position have larger meshes than the sieves in lower position.
  • Said frame is constituted by sections rigidly constrained to one another and is connected to moving devices that produce a vibrating motion of the frame, and thus of the sieves.
  • the frame is suspended from a rigid bearing structure by means of glass fibre or natural fibre rods that insulate the bearing structure from the vibrations produced by the machine.
  • Each sieve comprises a sieve carrier frame, substantially square or rectangular in shape, suited to be constrained to the frame of the machine body.
  • Said sieve carrier frame is provided with a holed fabric or a mesh net that defines the sieving surface.
  • the flour is loaded from above and progressively sieved by the different sieves, and each sieve allows the fraction whose particle size is smaller than the holes provided in the fabric to fall down, while it holds the fraction with larger particle size.
  • the fine fraction passes through said fabric and falls onto an underlying base of the sieve carrier frame, which has the function of conveying it and unloading it on one side of said base, from where the flour can be conveyed through a channel to the machine discharge opening or another sieving passage situated at a lower level, while the coarse fraction that would accumulate on said net is dropped through said side dropping window due to the effect of the vibrations generated by the machine.
  • the unsieved flour is generally conveyed into another sieve, until the remaining fraction is constituted by bran only, which is then conveyed to other machines for a further sorting process.
  • each holed fabric or net with meshes in the right size must be mounted in a fixed manner on a frame made of specifically shaped and sized sections.
  • US 2007/108107 relates to a sieve carrier frame for vibrating sieves comprising a square structure defining a sieving area and one or more side windows for discharging the unsieved flour, but no further frame for collecting the sieved flour and / or opening for discharging the sieved flour are disclosed.
  • the subject of the present invention is a new type of modular sieve that can be put together according to the grinding program to be followed.
  • the main object of the present invention is to provide a sieve that is completely modular, in which each part is interchangeable or suited to be assembled in different ways, so that it can be put together according to the structure of the sieve pile to be obtained.
  • said spaced section can be shorter than the other perimeter sections, in such a way as to be raised with respect to the corresponding opposite section of said base.
  • the flour that falls on the sieving surface is then sorted so as to obtain a fine fraction that passes through the fabric and falls onto said tray, and a coarser fraction that accumulates on the fabric itself.
  • the fine sieved fraction that has accumulated on said plane or tray of the base is unloaded through said discharge opening, for example onto the underlying sieve, while the coarse fraction that has accumulated on the fabric falls laterally through said flour dropping window, for example into a dedicated container.
  • Said opening for discharging the sieved flour is not on the same side as said flour dropping window.
  • Said discharge opening can for example be located on one or both of the sides adjacent to the side where the flour dropping window is positioned and/or on the opposite side, depending on the configuration and structure of the pile of sieves and of the machine.
  • said base can be coupled to any one of said small frames, said base and said small frame being mutually arranged according to any orientation, so that it is possible to obtain sieve carrier frames with flour dropping windows and discharge openings facing towards any side, depending on the construction needs.
  • composition and construction of the sieve carrier frames and of the pile that makes up the sieving channel is thus completely modular.
  • a further advantage offered by the present invention lies in that it facilitates the procurement and supply of the materials with which the frames are made, as standard sections easily available on the market are used.
  • the modularity of the system also brings the advantage of improving production, standardizing the frame construction process.
  • Said sections making up said small frame and said base are substantially tubular and have a box-shaped cross section to lighten the device, and furthermore properly shaped elements made of a plastic material serve the double function of closing the sections and connecting them with the purpose of making the actual frame.
  • the new sieve carrier frame (K) comprises an upper small frame (A, B, C, D) and a lower base (G).
  • Said upper small frame (A, B, C, D) comprises sections (1, 2, 3, 4) of various types, suited to form a supporting frame for a fabric or mesh net for sieving, not shown in the figure.
  • said small frame (A, B, C, D) is substantially rectangular or square in shape and comprises at least four perimeter sections (1, 3) assembled together to form the substantially rectangular or square profile of a sieving surface (L).
  • Said small frame (A, B, C, D) also comprises one or more further sections (1,2) defining a side flour dropping window (E) for the unsieved flour.
  • the new sieve carrier frame (K) also comprises at least one lower base (G), illustrated in detail in Figure 5 , suited to be coupled to the underside of one of said small frames (A, B, C, D), as shown in Figure 6 .
  • Said base (G) is suited to be coupled to any of said small frames (A, B, C, D) by means of a coupling profile (5), visible for example in Figures 5 and 7 and, in detail, in Figure 9 .
  • Said base (G), including any flour dropping windows (J), has a substantially rectangular or square shape corresponding to the shape of said small frame (A, B, C, D) and in turn comprises at least four perimeter sections (1) and at least one plane or tray (H) for collecting the sieved flour, with shape and size corresponding to those of said sieving surface (L) of the small frame (A, B, C, D).
  • Said plane or sieve (H) preferably consists of a plate, preferably in stainless steel, or a generically flat body installed on said sections (1) in a position corresponding to that of said sieving surface (L) of the upper small frame (A, B, C, D), thus defining a side flour dropping window (J) substantially corresponding to said flour dropping window (E) of said upper small frame (A, B, C, D).
  • the small frame (M) and the base (N) may comprise two of said side flour dropping windows (E, J) on adjacent sides.
  • Said sections (1, 2, 3, 4, 5) are preferably obtained by extruding, for example, aluminium or steel in specific shapes.
  • the portions intended to come in direct contact with food substances are made with anodized and passivated aluminium.
  • the base frame is preferable made of passivated aluminium and/or stainless steel, while the various parts are assembled together preferably using a double-component epoxy glue and screws for assembly with no welds.
  • the selected materials are suited to be used at various temperatures and humidity rates, being rather insensitive to said parameters.
  • Each one of said small frames (A, B, C, D) comprises at least one of said main delimiting sections (1) between said sieving surface (L) and said side flour dropping window (E), and at least one discharge section (3) on an adjacent side, right and/or left, and/or on the side opposite said side flour dropping window (E) and defining, with said base (G), one or more of said discharge openings (F).
  • each one of said small frames comprises at least three main sections (1), parallel to each other, two of which define two opposite perimeter sides while the third one defines said side flour dropping window (E).
  • Said side flour dropping window (E) is also delimited on the other two sides by further closing sections (2).
  • Said main sections (1) shown in cross section in Figures 8 and 9 , are tubular and have a box-shaped cross section, preferably substantially rectangular.
  • Said cross section is provided with a seat (11) suited to be used for assembling the various parts of said sieve carrier frame (K).
  • Said base (G) comprises four of said main sections (1) forming the perimeter of the base (G).
  • Said plane or tray (H) is constrained to three adjacent main sections (1) through a bending operation and the insertion of the corresponding three edges (H1) in said seat (11) in the sections (1).
  • said coupling section (5) has a substantially L-shaped cross section, wherein a first side (51) is constrained to said tray (H) of said base (G) at the height of its free edge (H2), while the second side (52) is suited to be inserted and constrained in said seat (11) in the main section (1) of the superimposed small frame (A, B, C, D).
  • Each one of said small frames (A, B. C, D) also comprises one or more perimeter discharge sections (3) defining one or more perimeter edges of the small frame (A, B, C, D) and specifically shaped to allow the sieved flour to be discharged.
  • the small frame (A) comprises three of said main sections (1) over its whole height, suited to be juxtaposed in contact with the corresponding sections (1, 5) of said lower base (G) as shown in Figure 7 , and two of said perimeter discharge sections (3) in opposite positions, and shorter in height than said main sections (1), in such a way as to be spaced from the corresponding main section (1) of said base (G), thus defining a discharge opening (F) for the sieved flour, as can be seen in Figure 6 .
  • said small frame (A) When assembled onto the base (G), said small frame (A) thus forms a sieve carrier frame (K) with two opposite discharge openings (F), on the right and on the left with respect to said flour dropping window (E).
  • FIGS 2, 3 and 4 instead, show other three examples of a small frame (B, C, D) where said short discharge section (3) is installed respectively on the left, on the right and opposite said flour dropping window (E), thus creating a discharge opening (F) respectively on the left, on the right and opposite said flour dropping window (E).
  • Said short discharge sections (3) for example, have a substantially rectangular or square cross section.
  • Said main sections (1) and/or said discharge sections (3) may come in different heights, in such a way as to make discharge openings (F) in different heights, always according to the construction needs, the height of said discharge openings (F) being defined by the difference in height between said main sections (1) and said discharge sections (3).
  • Said small frames also comprise one or more transverse stiffening and supporting sections (4), shown for example in Figure 10 , provided with recesses, seats or grooves (41) for their assembly.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)

Claims (10)

  1. Siebtragrahmen (K) für Rüttelsiebe, eine Vielzahl von Abschnitten (1, 2, 3, 4) umfassend, die so zusammengebaut sind, dass sie eine im Wesentlichen quadratische oder rechteckige Struktur bilden und einen Siebbereich (L) definieren, in dem ein gelochtes Gewebe oder ein Maschennetz positioniert werden kann, sowie wenigstens ein seitliches Mehlausfallfenster (E) umfassend, dazu geeignet, das ungesiebte Mehl herabfallen zu lassen, dadurch gekennzeichnet, dass er Folgendes umfasst:
    • einen oberen, kleinen Rahmen (A, B, C, D, M), der seinerseits wenigstens vier Umfangsabschnitte (1, 3) umfasst, welche den Umfang der besagten Siebfläche (L) bilden, sowie einen oder mehrere, weitere Abschnitte (1, 2), die wenigstens ein seitliches Fenster (E) definieren, das geeignet ist, das ungesiebte Mehl herabfallen zu lassen;
    • eine untere Basis (G, N), deren Form der Form des besagten, kleinen Rahmens (A, B, C, D, M) entspricht, dazu geeignet, mit der Unterseite des besagten, kleinen Rahmens (A, B, C, D, M) gekuppelt zu werden und ihrerseits wenigstens vier Umfangsabschnitte (1) umfassend, welche dem Außenumfang des besagten, kleinen Rahmens entsprechen, sowie wenigstens eine Ebene oder Steige (H) zur Aufnahme des gesiebten Mehls umfassend, in einer Position installiert, die der Position der besagten Siebfläche (L) des oberen, kleinen Rahmens (A, B, C, D, M) entspricht und somit wenigstens ein seitliches Mehlausfallfenster (J) definiert, das im Wesentlichen dem besagten, seitlichen Mehlausfallfenster (E) des besagten oberen, kleinen Rahmens (A, B, C, D, M) entspricht,
    und wobei einer oder mehrere der besagten Umfangsabschnitte (3) der Siebfläche (L) des besagten, oberen, kleinen Rahmens (A, B, C, D, M) von dem entsprechenden, entgegengesetzten Umfangsabschnitt (1) der besagten Basis (G, N) distanziert ist/sind und wenigstens eine Öffnung (F) zum Entladen des gesiebten Mehls definiert/definieren.
  2. Siebtragrahmen (K) gemäß Patentanspruch 1, dadurch gekennzeichnet, dass der besagte, distanzierte Abschnitt bzw. Entladeabschnitt (3) eine im Vergleich zu den anderen Umfangsabschnitten oder Hauptabschnitten (1) geringere Höhe aufweist, so dass er bezüglich des entsprechenden, entgegengesetzten Abschnitts (1) der besagten Basis (G, N) angehoben ist und somit die besagte Öffnung (F) zum Entladen des gesiebten Mehls definiert.
  3. Siebtragrahmen (K) gemäß Patentanspruch 2, dadurch gekennzeichnet, dass die Höhe der besagten Öffnung (F) zur Entladung des gesiebten Mehls entsprechend der Höhe der besagten Hauptabschnitte (1) und/oder der Höhe der besagten Entladeabschnitte (3) der besagten, kleinen Rahmen (A, B, C, D, M) variiert.
  4. Siebtragrahmen (K) gemäß den Patentansprüchen 1, 2, 3, dadurch gekennzeichnet, dass jeder der besagten Hauptabschnitte (1) rohrförmig ist und einen kastenförmigen Querschnitt mit wenigstens einer Aufnahme (11) für den Zusammenbau aufweist.
  5. Siebtragrahmen (K) gemäß vorstehenden Patentansprüchen, dadurch gekennzeichnet, dass jeder der besagten kleinen Rahmen (A, B, C, D, M) wenigstens einen der besagten Haupt-Begrenzungsabschnitte (1) zwischen der besagten Siebfläche (L) und einer oder mehrerer der besagten seitlichen Mehlausfallfenster (E) umfasst, sowie wenigstens einen der besagten Entladeabschnitte (3) an einer angrenzenden Seite, rechts und/oder links, und/oder an der dem/den besagten seitlichen Mehlausfallfenster(n) (E) entgegengesetzten Seite, und mit der besagten Basis (G, N) eine oder mehrere der besagten Entladeöffnungen (F) definiert.
  6. Siebtragrahmen (K) gemäß Patentanspruch 5, dadurch gekennzeichnet, dass der besagte kleine Rahmen (M) und die besagte Basis (N) jeweils zwei der besagten seitlichen Fenster (E, J) in entsprechenden Positionen umfassen.
  7. Siebtragrahmen (K) gemäß den Patentansprüchen 5, 6, dadurch gekennzeichnet, dass die besagte Basis (G, N) vier der besagten Hauptabschnitte (1), die den Umfang der Basis (G, N) bilden, umfasst, wobei die besagte Ebene oder Steige (H) an einem oder an mehreren der besagten Hauptabschnitte (1) durch einen Biegevorgang und die Einfügung einer oder mehrerer entsprechender Kanten (HI) der Steige (H) in die besagte Aufnahme (11) der Hauptabschnitte (1) befestigt ist, während eine oder mehrere freie Kanten (H2) der besagten Steige (H) zusammen mit einem oder mehreren entsprechenden, distanzierten Hauptabschnitten (1) ein oder mehrere der besagten seitlichen Mehlausfallfenster (J) definieren.
  8. Siebtragrahmen (K) gemäß Patentanspruch 7, dadurch gekennzeichnet, dass die besagte Basis (G, N) auf Ebene der freien Kante(n) (H2) der besagten Ebene oder Steige (H) ein weiteres Kupplungsprofil (5) für die Montage eines oberen, kleinen Rahmens (A, B, C, D, M) an der besagten Basis (G, N) umfasst, wobei das besagte Kupplungsprofil (5) einen im Wesentlichen L-förmigen Querschnitt hat und mit einer ersten Seite (51) auf Ebene der besagten freien Kante (H2) an der besagten Steige (H) befestigt ist, während die zweite Seite (52) dazu geeignet ist, in die besagte Aufnahme (11) im Hauptabschnitt (1) des darüber liegenden kleinen Rahmens (A, B, C, D, M) eingesetzt und in dieser befestigt zu werden.
  9. Siebtragrahmen (K) gemäß vorstehenden Patentansprüchen, dadurch gekennzeichnet, dass die besagten kleinen Rahmen (A, B, C, D, M) und/oder die besagte Basis (G, N) des Weiteren einen oder mehrere Querversteifungs- und Stützabschnitte (4) mit Vertiefungen, Aufnahmen oder Rillen (41) für ihren Zusammenbau aufweisen.
  10. Siebtragrahmen (K) gemäß vorstehenden Patentansprüchen, dadurch gekennzeichnet, dass die besagte Basis (G, N) mit jeglicher Ausrichtung mit jedem der besagten, kleinen Rahmen (A, B, C, D, M) gekuppelt werden kann.
EP12710329.9A 2011-03-28 2012-02-14 Sieb trägerrahmen Not-in-force EP2691185B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000094A ITPD20110094A1 (it) 2011-03-28 2011-03-28 Telaio porta setacci
PCT/IB2012/050660 WO2012131500A1 (en) 2011-03-28 2012-02-14 Sieve carrier frame

Publications (2)

Publication Number Publication Date
EP2691185A1 EP2691185A1 (de) 2014-02-05
EP2691185B1 true EP2691185B1 (de) 2014-12-17

Family

ID=43977272

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12710329.9A Not-in-force EP2691185B1 (de) 2011-03-28 2012-02-14 Sieb trägerrahmen

Country Status (5)

Country Link
EP (1) EP2691185B1 (de)
CN (1) CN103619494B (de)
BR (1) BR112013024577B1 (de)
IT (1) ITPD20110094A1 (de)
WO (1) WO2012131500A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015126335A1 (en) 2014-02-18 2015-08-27 Sedat Kunduraci A modular sieving box
CN112705457A (zh) * 2020-12-10 2021-04-27 蚌埠绿源创芯环保科技有限公司 多方位变频振动筛选装置及其垃圾处理设备

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19904499A1 (de) * 1999-02-04 2000-08-10 Buehler Ag Siebrahmen
GB2419308A (en) * 2004-10-14 2006-04-26 Satake Eng Co Ltd Sieve frame with labyrinth seal
WO2007061447A2 (en) * 2005-11-15 2007-05-31 Sefar Filtration Inc. Disposable pre-tensioned sieve frame and method of making same
DE102006005967A1 (de) * 2006-02-08 2007-08-09 Bühler AG Sieb
US8393474B2 (en) * 2006-09-29 2013-03-12 United Wire Limited Injection molded grid for saving screen frames

Also Published As

Publication number Publication date
CN103619494A (zh) 2014-03-05
EP2691185A1 (de) 2014-02-05
BR112013024577B1 (pt) 2020-06-16
WO2012131500A1 (en) 2012-10-04
ITPD20110094A1 (it) 2012-09-29
CN103619494B (zh) 2017-09-05
BR112013024577A2 (pt) 2016-12-20

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