EP0536803B1 - Siebreiniger, insbesondere für Plansichter - Google Patents

Siebreiniger, insbesondere für Plansichter Download PDF

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Publication number
EP0536803B1
EP0536803B1 EP92118340A EP92118340A EP0536803B1 EP 0536803 B1 EP0536803 B1 EP 0536803B1 EP 92118340 A EP92118340 A EP 92118340A EP 92118340 A EP92118340 A EP 92118340A EP 0536803 B1 EP0536803 B1 EP 0536803B1
Authority
EP
European Patent Office
Prior art keywords
sifter
screen
sieve
cleaner according
cleaner
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 - Lifetime
Application number
EP92118340A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0536803A1 (de
Inventor
Reinhard Rüter
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0536803A1 publication Critical patent/EP0536803A1/de
Application granted granted Critical
Publication of EP0536803B1 publication Critical patent/EP0536803B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • B07B1/50—Cleaning
    • B07B1/52—Cleaning with brushes or scrapers
    • B07B1/522—Cleaning with brushes or scrapers with brushes
    • 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
    • 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
    • B07B1/50—Cleaning
    • B07B1/54—Cleaning with beating devices

Definitions

  • the invention relates to a screen cleaner, in particular for the screen frames of plan sifters, as are used in mill operations for screening (sifting) the ground products.
  • a so-called square plan sifter is known from practice, in which the individual screen frames stacked one above the other have an essentially square outline shape.
  • Each sieve frame has a rectangular insert frame which is provided with a sieve covering.
  • the insertion frame is directly adjacent to the outer sieve frame on one side where the visible material is fed in, while on the three remaining sides product channels for removing the sieve overflow and the sieve diarrhea are incorporated into the outer sieve frame.
  • a further differentiation of the visible products is made possible by the fact that additional product channels are formed between the outer periphery of the sieve frame and a box-shaped sieve housing which accommodates the entire sieve stack.
  • the entire sieve compartment i.e. the sieve housing with one or more sieve stacks, is set in a horizontal circular oscillation during the viewing process.
  • Each sieve frame has a smooth bottom on which a freely movable floor scraper rests.
  • a corrugated grid for supporting screen cleaning bodies is arranged between the bottom and the screen covering.
  • the screen cleaning bodies are formed, for example, by short pieces of braided belt material, which are provided with a metal button on the underside and which are excited to vibrate during their random movements over the corrugated grille, so that they easily strike against the screen covering.
  • This design of the screen cleaner causes considerable noise and contributes to a relatively high overall weight of the screen frame.
  • a screen cleaner is known according to the preamble of claim 1, which has the outline shape of an equilateral triangle and is supported with its button-like foot tilting on the corrugated grid of the screen frame.
  • the invention has for its object to provide a screen cleaner that enables a weight-saving and simple construction of the screen frame and with which a good cleaning effect can still be achieved.
  • a plan sifter with the screen cleaners according to the invention is the subject of claim 11.
  • the screen cleaners according to the invention are formed by projecting arms.
  • the corrugated grids of the conventional screen frames can be omitted.
  • the cleaning of the sieve is also supported here by blows against the sieve covering, since the sieve cleaning bodies always have the tendency to tip around the lower end of their stem-like foot and thus strike the sieve covering with their outer upper edges. Tests have shown that the cleaning effect that can be achieved in this way is at least equal to the effect of conventional screen cleaning bodies on corrugated grids.
  • the screen cleaning body preferably has the shape of a three-armed star. Due to the cantilevered arms of the star a high moment of inertia is achieved during the tilting movement with a relatively low overall weight, so that sufficiently violent blows are exerted on the fabric.
  • the star-shaped design also has the advantage that the arms of the screen cleaning body can penetrate well into the corners of the screen, so that an effective cleaning of the screen covering is also achieved there. While conventional sieve cleaning bodies made of belt material are rounded at the corners over time so that they can no longer penetrate into the corners of the sieve, the star-shaped sieve cleaning body retains its star-shaped shape even with partial wear.
  • the screen cleaning body preferably consists of a rubber-elastic plastic, so that at most very little wear occurs. Due to the spring action of the arms of the star when bumping against the walls of the screen frame, the screen cleaning body is also excited to violent movements, so that the cleaning effect is enhanced while on the other hand, due to the flexibility of the arms, excessive strain on the fabric is avoided. Because of these properties, the star-shaped screen cleaning body is also an advantage for conventional screen frames with corrugated grids.
  • the sieve cleaning element can also be combined with the floor clearers that are already on the sieve bottom. This enables a shortening of the stick-like foot and thus a saving in weight and a shortening of the tilting radius. Another advantage is that the engagement of the foot of the screen cleaning body in the floor clearer prevents the latter from being thrown out of the screen frame through the discharge slot for the screen diarrhea.
  • An impact body is advantageously arranged on the sieve bottom, approximately below the middle of the sieve covering. While it can be observed with conventional screen cleaning bodies and screen frames that the screen cleaning body is mostly in the central region of the screen, the impact body has the function of driving the screen cleaning body into the edge and corner areas of the screen by frequent collisions.
  • a sieve compartment 10 of a plan sifter has a cylindrical sieve housing 12 which accommodates a number of sieve frames 14 stacked one above the other and exactly aligned with one another.
  • the sieve frames 14 are held at the corners by vertically extending strips 16 which are triangular in cross section and are fastened to the inner wall of the sieve housing 12.
  • the sieve housing 12 is formed by two half-shells 18 made of aluminum sheet, which are detachably screwed together in a dividing plane running through two diagonally opposite corners of the sieve frame 14 via vertically extending flanges 20. After loosening one of the half-shells 18, the inserted screen frames 14 can be easily removed.
  • the segments of the half-shells 18 formed between the strips 16 each have a vertically running, approximately trapezoidal stiffening profile 22 made of aluminum sheet on the inside.
  • the surfaces of the half-shells 18 and the stiffening profiles 22 and the strips 16 facing the interior of the sieve housing are provided with a lining made of food-compatible, foamed plastic, felt or the like, which is not specified in any more detail.
  • the screen frame 14 has a cross grating 26 provided on its upper side with a screen covering 24, which is formed by outer frame members 28, 30 and central webs 32, 34.
  • a screen covering 24 is formed by outer frame members 28, 30 and central webs 32, 34.
  • the cross grille 26 is closed off by a smooth, continuous floor 36, which is on two opposite Edges are provided with spacer strips 38 for support on the next lower sieve frame.
  • the frame members 30 and the central web 32 are spaced from the bottom 36, so that discharge slots 40 are formed for the sieve diarrhea.
  • the sieve frame 14 constructed in this way consists only of a relatively small number of differently shaped woods, so that a rational mass production is possible.
  • a feed plate 52 projecting horizontally into the product channel 42, the outer edge of which lies closely against the lining of the sieve housing 12.
  • the visible material fed through the product channel 42 is guided onto the screen covering 24 via this feed plate 52.
  • the entire sieve compartment 10 executes a circular oscillation in the drawing plane of FIG. 1, so that the visible material is distributed and sieved over the sieve covering 24.
  • the sieve diarrhea is released into the product channels 46 and 48 via the discharge slots 40, while the sieve overflow is directed via the product channel 44 onto a feed plate 54 of the next lower sieve frame, indicated by dashed lines in FIG.
  • the product guidance described above can be changed in a simple manner by inserting the sieve frames 14 in different orientations and / or by attaching the feed plates 52, 54 to other sides of the sieve frame.
  • FIG. 2 shows two different embodiments of screen cleaning bodies 58 and 60, each of which has a stem-like foot 62.
  • the foot 62 engages in a recess in a disc-shaped bottom clearer 64 lying flat on the bottom 36, so that the bottom clearer 64 and the screen cleaning body 58 move together over the bottom surface during the shaking movements of the screen.
  • the foot 62 lies directly on the floor 36.
  • the lower end of the foot 62 is somewhat rounded, so that the screen cleaning body has a tendency to tip over until it strikes the screen covering 24 with its outer edge and rebounds.
  • the top of the screen cleaning bodies are provided with knobs or brushes 66 for gentle cleaning of the screen covering. Due to friction with the floor 36 and in particular due to collisions with the frame members or middle webs of the oscillating sieve frame, the sieve cleaning bodies are kept in an irregular, tumbling movement, so that they gradually sweep over the entire sieve covering 24 at random.
  • baffles 68 are fixedly attached to the bottom 36, on which the bottom clearer 64 or the foot 62 is additionally pushed, so that the screen cleaning body is often thrown into the edge regions and corners of the screen frame.
  • the screen cleaning body 60 has the shape of a three-pointed star with relatively long and slender arms 70 which penetrate well into the corners of the screen covering.
  • the screen cleaning body 60 is made of a rubber-elastic material, so that the arms 70 in the event of collisions with the frame members of the sieve frame act like springs and stimulate the sieve cleaning body to undergo violent translational and rotational movements.
  • the elastic cushioning of the bumps also reduces noise.
  • the thickness of the screen cleaning body is such that the arms have a softer suspension behavior when deflected vertically. In this way, good contact with the screen covering is ensured and overuse of the fine screen gauze is avoided.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Catching Or Destruction (AREA)
EP92118340A 1988-01-30 1989-01-30 Siebreiniger, insbesondere für Plansichter Expired - Lifetime EP0536803B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3802799 1988-01-30
DE3802799A DE3802799A1 (de) 1988-01-30 1988-01-30 Plansichter
EP89101573A EP0330846A3 (de) 1988-01-30 1989-01-30 Plansichter

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP89101573A Division EP0330846A3 (de) 1988-01-30 1989-01-30 Plansichter
EP89101573.7 Division 1989-01-30

Publications (2)

Publication Number Publication Date
EP0536803A1 EP0536803A1 (de) 1993-04-14
EP0536803B1 true EP0536803B1 (de) 1995-08-30

Family

ID=6346328

Family Applications (2)

Application Number Title Priority Date Filing Date
EP92118340A Expired - Lifetime EP0536803B1 (de) 1988-01-30 1989-01-30 Siebreiniger, insbesondere für Plansichter
EP89101573A Withdrawn EP0330846A3 (de) 1988-01-30 1989-01-30 Plansichter

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP89101573A Withdrawn EP0330846A3 (de) 1988-01-30 1989-01-30 Plansichter

Country Status (4)

Country Link
EP (2) EP0536803B1 (enrdf_load_stackoverflow)
AT (1) ATE127043T1 (enrdf_load_stackoverflow)
DE (2) DE8816420U1 (enrdf_load_stackoverflow)
ES (1) ES2078624T3 (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2465616A1 (de) 2010-12-15 2012-06-20 Sefar AG Siebreiniger für Plansichter
KR101571955B1 (ko) * 2014-01-27 2015-11-25 장상국 수평 및 상하 진동을 하는 체질용 곡물 선별장치
WO2016062826A1 (de) 2014-10-24 2016-04-28 Bühler AG Siebreiniger, siebeinheit und verfahren

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3933145A1 (de) * 1989-10-04 1991-04-11 Reinhard Rueter Kontrollsiebungs-verfahren und sichter zu dessen durchfuehrung
CH685604A5 (de) 1992-02-29 1995-08-31 Buehler Ag Plansichter.
DE59702932D1 (de) 1996-08-20 2001-02-22 Buehler Ag Plansichter
DE19706601C1 (de) * 1997-02-20 1998-11-12 Buehler Ag Siebrahmen für Plansichter und Verfahren zu dessen Herstellung
ES2176592T3 (es) * 1997-11-29 2002-12-01 Buehler Ag Geb Limpiador del filtro para una criba rotatoria.
DE19825617A1 (de) * 1998-06-08 1999-12-09 Filip Gmbh Muellereibuersten Vorrichtung zur Siebrahmen- und Bodenreinigung eines Siebkastens
RU2160170C2 (ru) * 1999-03-17 2000-12-10 Белоносов Александр Иванович Мельничный рассев с многофракционным делением продуктов помола
DE59907461D1 (de) 1999-08-18 2003-11-27 Allgaier Werke Gmbh Siebeinsatz für eine Rundsiebmaschine
DE10105647A1 (de) * 2001-01-19 2002-07-25 Buehler Ag Sieb und Verfahren zur Herstellung von Sieben
CN112938019B (zh) * 2021-04-06 2022-07-12 江西诺泰生物科技有限公司 一种固体饮料包装机可拆卸式投料口除杂装置
EP4197655B1 (en) 2021-12-20 2025-02-12 Bühler AG Sieve and frame with improved connectability

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE388500C (de) * 1922-11-01 1924-01-19 Masch Fabrk Und Muehlenbauanst Freischwingender Vierfachplansichter
US2086199A (en) * 1936-04-10 1937-07-06 Gump B F Co Cloth cleaner
FR892887A (fr) * 1943-03-26 1944-05-23 Appareil de tamisage
CH372207A (de) * 1959-09-16 1963-09-30 Buehler Ag Geb Plansichter
FR1282737A (fr) * 1960-12-17 1962-01-27 Socam Sa Dispositif pour le dégommage des fonds d'appareils de tamisage
US3366239A (en) * 1965-01-21 1968-01-30 Southwestern Eng Co Self-cleaning screen structure for vibratory separators
DE1932092U (de) * 1965-12-08 1966-02-03 Union Seidengaze G M B H Siebreiniger.
US3422955A (en) * 1966-04-11 1969-01-21 Smico Inc Superimposed gyratory sifters
US3422995A (en) * 1967-11-13 1969-01-21 Apaw Sa Portioning and dispensing device including adjustment means to vary the volume of the proportions
US4288320A (en) * 1980-05-05 1981-09-08 Litton Systems, Inc. Vibrating screen with screen deck unclogging mechanism
DE8631814U1 (de) * 1986-11-27 1987-02-19 Filip, Martin, 4830 Gütersloh Siebreiniger

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2465616A1 (de) 2010-12-15 2012-06-20 Sefar AG Siebreiniger für Plansichter
KR101571955B1 (ko) * 2014-01-27 2015-11-25 장상국 수평 및 상하 진동을 하는 체질용 곡물 선별장치
WO2016062826A1 (de) 2014-10-24 2016-04-28 Bühler AG Siebreiniger, siebeinheit und verfahren
US10335831B2 (en) 2014-10-24 2019-07-02 Bühler AG Sieve cleaners, sieve unit, and methods

Also Published As

Publication number Publication date
DE3802799A1 (de) 1989-08-10
ES2078624T3 (es) 1995-12-16
DE3802799C2 (enrdf_load_stackoverflow) 1989-12-21
ATE127043T1 (de) 1995-09-15
DE8816420U1 (de) 1989-08-10
EP0330846A3 (de) 1990-06-27
EP0330846A2 (de) 1989-09-06
EP0536803A1 (de) 1993-04-14

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