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EP0015633A1 - Procédé et dispositif de classement de grains ou de semences - Google Patents

Procédé et dispositif de classement de grains ou de semences Download PDF

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Publication number
EP0015633A1
EP0015633A1 EP80200342A EP80200342A EP0015633A1 EP 0015633 A1 EP0015633 A1 EP 0015633A1 EP 80200342 A EP80200342 A EP 80200342A EP 80200342 A EP80200342 A EP 80200342A EP 0015633 A1 EP0015633 A1 EP 0015633A1
Authority
EP
European Patent Office
Prior art keywords
sieve
members
dam
classifying device
classifying
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.)
Granted
Application number
EP80200342A
Other languages
German (de)
English (en)
Other versions
EP0015633B1 (fr
Inventor
Roman Müller
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
Publication of EP0015633A1 publication Critical patent/EP0015633A1/fr
Application granted granted Critical
Publication of EP0015633B1 publication Critical patent/EP0015633B1/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
    • 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
    • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B07B13/04—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices according to size
    • B07B13/05—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices according to size using material mover cooperating with retainer, deflector or discharger

Definitions

  • the invention relates to a method for classifying grain or seeds, such as for classifying cereal grains, seeds, legumes, rice grains, corn kernels, coffee beans or the like.
  • the invention also relates to a classifying device which is preferably suitable for carrying out the method according to the invention.
  • the size of the grain is a quality criterion and as such must be adhered to within the narrowest possible limits.
  • the object of the invention is to find a classification method in which the classification is improved in size and the negative influence of form factors is eliminated as far as possible.
  • a method is to be found which, particularly in the case of such classification products, still allows the use of flat sieves otherwise the desired classification accuracy could not be achieved.
  • the method according to the invention should meet the highest demands both in terms of its performance and in its classification accuracy, without the need for complicated additional expenditure.
  • the invention is intended to find a device for carrying out such a method according to the invention which is suitable for use with a large number of very different classifying goods (such as cereals, legumes, soybeans, coffee beans, seeds or the like) and with which a particularly good classification is achieved what is particularly important in the production of seeds, on which a substantial part of the progress possible in agricultural production is based.
  • classifying goods such as cereals, legumes, soybeans, coffee beans, seeds or the like
  • this object is achieved in a method for classifying grain or seeds in that the classifying material is cleaned of foreign matter in a first stage and classified by a (preferably linear) moving sieve surface with multiple stowage.
  • the method according to the invention has surprisingly achieved great success in practice.
  • the principle previously represented in the specialist world that the sieving capacity is at a maximum at a relatively low dumping height and decreases with increasing dumping height is completely broken through in the invention by deliberately requiring repeated jam there.
  • ' for sieving out-of-round grains not only the passage through the sieve opening alone may be considered, but also the preparation, ie the correct positioning of the grains relative to the sieve holes.
  • the individual grains are literally “set up” and can thus fall through the perforated screen with their smallest cross-sectional area.
  • Grains that come into contact with the screen perforation, for example, at a slight incline, are literally set up by the grain layer above and guided into the opening with a slight pressure.
  • the product stowage also has the particular advantage that the product is repeatedly forced to recirculate. This means that a grain is given more than once in each barrage to take a favorable position for passage through the perforated screen.
  • the classified material is accumulated several times, preferably to a height of 2 to 5 cm, and the product is transported from dam stage to dam stage in an area directly above the screen surface (the specified height dimensions being particularly advantageous for processing purposes) of rice; in the case of corn, it is advisable to thaw even more than 5 cm high).
  • each dam stage is formed by a dam member directed at the product flow at low pressure and the size of the passage cross section is regulated as a function of the product flow, preferably by the product flow itself.
  • the deflection of the dam member can be connected with a progressively growing force.
  • the passage cross-section usually has a size corresponding to one to three times the thickness of a single grain point or swing around such a value; if more product is being conveyed at the moment, the passage cross-section should be able to adapt by opening it accordingly.
  • the device according to the invention is based on a classifying device with a flat sieve which can be set into (preferably linear) vibrations, wherein according to the invention, damming members are arranged above the sieve and transversely to the longitudinal direction of the sieve.
  • a device according to the invention makes it possible to carry out the method according to the invention and to achieve the advantages associated with it.
  • the sieve is divided into at least two compartments in the longitudinal direction and each compartment has dam members.
  • a particularly simple but effective design for the dam members can be achieved in a classifying device according to the invention in that the dam members are suspended in the manner of a hanging swing door which can be opened by the product flow in the direction of product flow.
  • the inclination of the damming members and / or their distance from the screen surface can be adjusted in a classifying device according to the invention. It is particularly advantageous if the dam members in the sieve box are adjustable from the outside and for this purpose the sieve box is at least partially made of transparent material, preferably transparent plastic, such as e.g. Plexiglas, is carried out, which means that the classification quality can also be checked during operation. It is also advantageous to design the inclination of the sieve and the vibration intensity to be adaptable to the respective application. The invention enables a particularly effective use of the sieve inclination setting because the product cannot simply swim away as a repulsion in the case of a larger inclined position.
  • Another advantageous embodiment of the classifying device according to the invention also consists in that the dam members are designed as pendulum flaps hanging down on hinges and deflectable in the product flow direction from the product flow, whereby a simple but effective self-regulation of the passage cross section can be achieved depending on the strength of the product flow .
  • the dam members are made of solid rubber, plastic or fabric.
  • the use of congestion links made of rubber of medium softness has proven particularly good.
  • the dam members have a function which corresponds to that of a "curtain", as has been used occasionally in the past (but only to hold back spray particles).
  • the retention force of the dam member should always be so great that a product in all operating cases stowage is guaranteed, the height of the product stowage should advantageously be approximately approximately twice as large or even greater than the corresponding layer height in the previously known normal screening technique.
  • the method according to the invention is shown in FIG. 1, in which, in a manner known per se, the product to be classified is first cleaned in a stage 1 and then in the actual classification stage 2 into the desired size classes. In this way, the classifying screen is not burdened from the outset by undesirable additives.
  • the classifying screen has several outputs.
  • FIG. 2 shows a screening device 4 with two parallel runs 5 and 6, which are separated by an intermediate floor 7.
  • the inclination (a) of the sieve device 4 as a whole is adjustable.
  • the scheme parts 8 and 9 are arranged in the head part 10 of the screening device 4 and the necessary scheme parts 12 in the foot part 11 of the screening device.
  • the flow of the classified material e.g. a grain flow or a flow of coffee beans is 10-fed into the sieving device 4 via the inlets 13 and 14 of the head part.
  • the diarrhea of the sieves 15 and 16 is passed on via an outlet 17 and 19, and the repulsion of the sieves 15 and 16 in each case via an outlet 18 and 20.
  • the sieve device 4 has dam members 21 which divide the entire sieve zone or the corresponding process zone into several units.
  • a vibrator symbolically represented in FIG. 2 as an electromagnet, causes the sieve device 4 to vibrate.
  • unbalance vibrators can also be used in practice, the inclination (.beta.) Of which can be adjusted and which, by suitable attachment, can produce a, preferably linear, oscillating movement.
  • Figure 3 shows a single screen 30 which is provided with five dam members 21.
  • the sieve bottom 30 consists of a sieve 31 and a wire mesh 32, both of which form a cavity 33 in which there are balls 34 for the continuous cleaning of the sieve 30.
  • FIG. 4 shows the combination of the dam members 21: two wooden strips 40 separate the entire sieve zone into three longitudinal channels as longitudinal strips and are fastened to a sieve 43 with screws 42.
  • FIG. 5 shows the representation of a dam member. Screws 51 are attached in the wooden strip 50 and fastened by means of nuts 52.
  • the actual dam member 53 is connected to the screw 51 via an angle iron 54.
  • the angle iron 54 is fixed by nuts 55 and 56.
  • the angle iron 54 and thus the dam member 53 can be adjusted in its height 57 (relative to the sieve).
  • the dam member 53 is advantageously made of materials such as rubber, plastic, reinforced or rigid fabrics and - in special cases - also of sheet metal. It is essential that the damming element 53 opposes the product flow with a resistance, through which it can cause a certain damming effect. Possibly. a single dam member 53 on a sieve surface can lead to a significant improvement in the classification. If elastic dam members, eg made of rubber, are used, the distance between the dam member and the sieve surface (X) is set automatically.
  • FIG. 6 shows a schematic representation of the sequence of movements of the flow of the classified material.
  • the entire screening zone is divided into a number of individual processing zones 60 by the various damming members.
  • the main product flow along the screen is overlaid by a backward flow in the individual process zones.
  • FIG. 8 shows a further embodiment for a dam member, which here is in the form of a brush 65, preferably made of plastic, which is attached above the sieve bottom 67.
  • a side wall of the screening device is preferably formed from plexiglass. Since the height of the separating elements, for example according to the embodiment according to FIG. 5, can be adjusted, an adjustment can be made both on the basis of the observation by the operator and on the basis of the sieving performance until the desired grain movement is optimal in the individual sieving zones, i.e. until the highest classification performance occurs.
  • the dam members can also be easily replaced. This makes it possible to adapt the retention force of the dam members to the flow properties of the product or to optimally classify different products.
  • the use of up to six damming elements per meter of screen length has proven to be particularly advantageous.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
EP19800200342 1979-03-05 1980-03-05 Procédé et dispositif de classement de grains ou de semences Expired EP0015633B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH212779 1979-03-05
CH2127/79 1979-03-05

Publications (2)

Publication Number Publication Date
EP0015633A1 true EP0015633A1 (fr) 1980-09-17
EP0015633B1 EP0015633B1 (fr) 1981-11-25

Family

ID=4226503

Family Applications (2)

Application Number Title Priority Date Filing Date
EP19800200342 Expired EP0015633B1 (fr) 1979-03-05 1980-03-05 Procédé et dispositif de classement de grains ou de semences
EP19800900550 Expired EP0020761B1 (fr) 1979-03-05 1980-09-24 Procede pour le tri de matiere en grains ou de semences et installations de tri

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP19800900550 Expired EP0020761B1 (fr) 1979-03-05 1980-09-24 Procede pour le tri de matiere en grains ou de semences et installations de tri

Country Status (6)

Country Link
EP (2) EP0015633B1 (fr)
JP (1) JPS56500324A (fr)
BR (1) BR8007232A (fr)
DE (1) DE3060512D1 (fr)
DK (1) DK419980A (fr)
WO (1) WO1980001885A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994016827A1 (fr) * 1993-01-28 1994-08-04 Wolfgang Zimmermann Dispositif de criblage, accessoire pour dispositif de criblage et procede de criblage
EP0692580A1 (fr) * 1994-07-11 1996-01-17 Hirose Co., Inc. Appareil d'excavation, tamisage et nivelage pour engin de chantier à chenilles
NL1012513C2 (nl) * 1999-07-05 2001-01-08 Kaliwaal Bijland B V Zeef.
AU740967B2 (en) * 1997-04-17 2001-11-15 Kvaerner Panel Systems Gmbh Maschinen- Und Anlagenbau Device for fractionating and scattering specially fibrous particles
EP2055395A3 (fr) * 2007-11-02 2011-03-30 SCHOTT Solar AG Procédé et dispositif destinés au criblage de particules
CN108480215A (zh) * 2018-06-07 2018-09-04 郑艳芬 提升式菌菇分选装置
CN115254625A (zh) * 2022-08-08 2022-11-01 中建一局集团第五建筑有限公司 一种基于分层式结构建筑用砂石筛分装置及其筛分方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112517391A (zh) * 2020-12-01 2021-03-19 楼小莲 一种农业用种子除杂晾晒装置
CN113019927B (zh) * 2021-04-22 2022-03-11 河南农业大学 一种荷花种子饱瘪筛分装置
CN117563945B (zh) * 2024-01-17 2024-04-19 吉林省向宇农副产品有限公司 一种瓜子加工用筛选机

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE282289C (fr) *
BE389758A (fr) *
US1523389A (en) * 1923-01-29 1925-01-20 Otto F Beythan Grain sorting and cleaning machine
FR648206A (fr) * 1927-10-03 1928-12-06 Machine automatique permettant d'obtenir, séparées des coques et classées, des amandes, noix, noisettes et autres fruits déjà cassés
DE555642C (de) * 1932-07-27 Edwin Goodwin Steele Sortierherd fuer Getreide o. dgl.
US1981081A (en) * 1931-06-22 1934-11-20 Lowe E Simpson Sifting apparatus
US2187273A (en) * 1937-07-12 1940-01-16 Nordberg Manufacturing Co Hammer screen
US2954124A (en) * 1957-02-06 1960-09-27 Roy N Young Separator
US3844411A (en) * 1972-09-25 1974-10-29 M Lewis Object segregating mechanism

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE282289C (fr) *
BE389758A (fr) *
DE555642C (de) * 1932-07-27 Edwin Goodwin Steele Sortierherd fuer Getreide o. dgl.
US1523389A (en) * 1923-01-29 1925-01-20 Otto F Beythan Grain sorting and cleaning machine
FR648206A (fr) * 1927-10-03 1928-12-06 Machine automatique permettant d'obtenir, séparées des coques et classées, des amandes, noix, noisettes et autres fruits déjà cassés
US1981081A (en) * 1931-06-22 1934-11-20 Lowe E Simpson Sifting apparatus
US2187273A (en) * 1937-07-12 1940-01-16 Nordberg Manufacturing Co Hammer screen
US2954124A (en) * 1957-02-06 1960-09-27 Roy N Young Separator
US3844411A (en) * 1972-09-25 1974-10-29 M Lewis Object segregating mechanism

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994016827A1 (fr) * 1993-01-28 1994-08-04 Wolfgang Zimmermann Dispositif de criblage, accessoire pour dispositif de criblage et procede de criblage
US5915567A (en) * 1993-01-28 1999-06-29 Zimmermann; Wolfgang Screen accessory for screen and screening process
EP0692580A1 (fr) * 1994-07-11 1996-01-17 Hirose Co., Inc. Appareil d'excavation, tamisage et nivelage pour engin de chantier à chenilles
US5581916A (en) * 1994-07-11 1996-12-10 Hirose Co., Inc. Excavating, sieving and grading device for working crawler
AU740967B2 (en) * 1997-04-17 2001-11-15 Kvaerner Panel Systems Gmbh Maschinen- Und Anlagenbau Device for fractionating and scattering specially fibrous particles
NL1012513C2 (nl) * 1999-07-05 2001-01-08 Kaliwaal Bijland B V Zeef.
EP2055395A3 (fr) * 2007-11-02 2011-03-30 SCHOTT Solar AG Procédé et dispositif destinés au criblage de particules
CN108480215A (zh) * 2018-06-07 2018-09-04 郑艳芬 提升式菌菇分选装置
CN108480215B (zh) * 2018-06-07 2024-03-26 福建天天源生物科技有限公司 提升式菌菇分选装置
CN115254625A (zh) * 2022-08-08 2022-11-01 中建一局集团第五建筑有限公司 一种基于分层式结构建筑用砂石筛分装置及其筛分方法
CN115254625B (zh) * 2022-08-08 2023-08-25 中建一局集团第五建筑有限公司 一种基于分层式结构建筑用砂石筛分装置及其筛分方法

Also Published As

Publication number Publication date
JPS56500324A (fr) 1981-03-19
WO1980001885A1 (fr) 1980-09-18
EP0015633B1 (fr) 1981-11-25
EP0020761A1 (fr) 1981-01-07
DE3060512D1 (en) 1982-07-29
BR8007232A (pt) 1981-02-03
EP0020761B1 (fr) 1982-06-09
DK419980A (da) 1980-10-03

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