EP0009692A1 - Tamis à bandes de criblage circulant autour de poulies de renvoi - Google Patents

Tamis à bandes de criblage circulant autour de poulies de renvoi Download PDF

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Publication number
EP0009692A1
EP0009692A1 EP79103452A EP79103452A EP0009692A1 EP 0009692 A1 EP0009692 A1 EP 0009692A1 EP 79103452 A EP79103452 A EP 79103452A EP 79103452 A EP79103452 A EP 79103452A EP 0009692 A1 EP0009692 A1 EP 0009692A1
Authority
EP
European Patent Office
Prior art keywords
sorting machine
machine according
sorting
sieve
belt
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.)
Withdrawn
Application number
EP79103452A
Other languages
German (de)
English (en)
Inventor
Anton Huber
Josef Eichner
Ludwig Kreuzpaintner
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.)
Reifen Huber Therese Huber u Sohn
Original Assignee
Reifen Huber Therese Huber u Sohn
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 Reifen Huber Therese Huber u Sohn filed Critical Reifen Huber Therese Huber u Sohn
Publication of EP0009692A1 publication Critical patent/EP0009692A1/fr
Withdrawn legal-status Critical Current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
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • 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
    • B07B1/10—Screens in the form of endless moving bands

Definitions

  • the invention relates to a sorting machine, in particular for the square sorting of agricultural products such as potatoes, onions, etc., with at least one sieve belt rotating over deflection rollers.
  • Such a sorting machine is known from a brochure "Lockwood International Processing System for Potatoes".
  • a brochure "Lockwood International Processing System for Potatoes” Compared to flat vibrating sieves, such an all-round sieve belt has the advantage that the conveying movement can be set precisely and gently for the material, while in vibrating sieves the material is only conveyed over the sieve surface by sieve inclination and shaking movement, which is necessary given the comparatively low sieving inclination Vibration movement with considerable amplitude and thus the risk of damage to the goods.
  • a major problem with the use of such sieve belts is the need to deflect the sieve belt over the deflection rollers.
  • the screen belt must be kept flexible transversely to the running direction.
  • this is achieved in that steel wire or the like bent in a meandering shape is aligned in the direction of the axis of the deflection and is connected in the cranked outer areas to corresponding areas of an adjacent wire by means of metal clips.
  • the wire sections held therein can twist when deflected, so that sufficient flexibility is achieved.
  • Such formation of the sieve belt is, however, susceptible to wear, since relative movements constantly occur between the wire sections held in the brackets. Such wear is further increased by the fact that the material generally brings a not inconsiderable amount of sand and similar impurities into the sorting machine, which settles in the hinges of the screen belt and significantly increases wear in the event of relative movements.
  • the surface of the metal sieve belt is naturally hard and has edges, particularly in the area of the connecting clamps, which leads to damage to the goods, especially with regard to the fact that when sorted by more than two sizes, the smaller sizes are released through the upper sieve belt fall on the lower sieve belt and from there fall on a third sieve belt if necessary after more than three sizes should be sorted.
  • the shaking or oscillating movement which is introduced via an additional support roller on the upper run of the screen belt, can also damage the material on the metal of the screen belt.
  • pieces of tubing of a suitable clear internal cross-section are placed on the rods.
  • this rubber coating is inevitably comparatively thin, so that the protective effect is only limited and, moreover, with regard to the foreign bodies introduced into the sorting machine by wear, especially since there are also relative movements between the tube pieces and the rods.
  • Damage to the goods cannot therefore be ruled out even with the sorting machine working with a rotating screen belt.
  • damage is intolerable, particularly when the sorting machine is used as a storage sorter, since it leads to the complete deterioration of the damaged goods during the storage period.
  • damage naturally means a considerable reduction in the quality of the product to be sold.
  • the invention is based on the object of creating such a machine of the type described at the outset which is as simple as possible Damage to the goods during sorting is significantly reduced or avoided entirely.
  • the core made of dimensionally stable material ensures that the screen belt is sufficiently stable against bending about an axis running transversely to the deflection axis.
  • This support frame made of dimensionally stable material acts like a traveling grate with grate bars lying transversely to the direction of travel, which securely support the material lying thereon.
  • the rods lying in the direction of travel consist exclusively of rubber or the like and easily adapt to the shape of the deflection rollers during the deflection.
  • the material In contrast to a covering made of tube pieces, the material only comes into contact with a soft, correspondingly thick rubber layer or with rods made entirely of rubber or the like, so that optimal protection is ensured.
  • the rubber surface is seamless with regard to the one-piece design, so that penetration of foreign bodies is absolutely excluded and practically no wear can occur at the deflection points.
  • the entire sieve belt or individual sections of a longer sieve belt can be produced in a flat shape, into which the spring bars or the like and, if appropriate, other inserts not made of rubber are inserted, after which the one-piece reshaping with rubber and vulcanization can take place, so that on rationally a well-padded, wear-resistant screen belt can be produced in one piece at least in sections.
  • the operation of the sorting machine according to the invention is particularly clear from FIG. 1.
  • the goods to be sorted such as potatoes, pass through a feed chute 1 to a roller pre-sorter 2, which, in a manner known per se, has the task of separating larger clods of earth and particularly small sizes of the goods which are below the smallest size to be sorted.
  • a roller pre-sorter 2 which, in a manner known per se, has the task of separating larger clods of earth and particularly small sizes of the goods which are below the smallest size to be sorted.
  • this separated product in the pre-sorter 2 reaches a suitable container (not shown) or the like.
  • the rest of the material to be sorted is fed by the pre-sorter 2 onto a first screen belt 4 with comparatively small square openings, as illustrated in a detail in FIG. 3 and in FIGS. 4 and 5 is shown in partial sections in natural size.
  • the sieve belt 4 runs over a front deflection roller 5 and a rear deflection roller 6 continuously in the direction of arrow 7, the material being conveyed from the feed area near the deflection roller 5 in the direction of the arrow 7 on the sieve belt 4 to the deflection roller 6 and those components of the goods which fit through the sorting squares of the sieve belt 4 fall through the sieve belt 4 in this way.
  • the remaining, too large portions of the material first run on the top of the deflection roller 6 and from there via a schematically illustrated chute 8 to the top of a screen belt 9 arranged in the example directly below the screen belt 4, which is designed entirely according to the screen belt 4, with the only difference that the size of the sorting squares is increased by an amount corresponding to the next sorting size.
  • the screen belt 9 runs over guide rollers 10 and 11 continuously in the direction according to arrow 1 2 to, wherein the non-through-falling on the path between the guide rollers 10 and 11 by the sorting squares of the wire 9 fractions of the material in the area of the sorting roller 11 in a suitable gentle manner be caught and discharged.
  • the material falling through the sieve belt 4 reaches a discharge conveyor 13, while the material falling through the sieve belt 9 arrives at a discharge conveyor 14.
  • the discharge conveyors 13 and 14 are designed as conventional belt conveyors, which are arranged horizontally transversely to the sieve belts 4 and 9 and with a feed section 13a and 14a between the upper and the lower run of the sieve belts 4 and 9 reach in, while the discharge sections 13b and 14b protrude laterally from the sorting machine and convey the goods falling through the respective sieve belts 4 and 9 to a collection point in a manner not shown in detail.
  • a driven electric roller 15 is provided for each driven belt 4 and 9, and a common electric motor 15, which, as is illustrated very schematically, is provided in any suitable manner, which, as is illustrated very schematically is not shown in detail, drives the corresponding deflection rollers 5 or 6 and 10 or 11. This drive takes place continuously.
  • a further, possibly smaller electric motor 16 is provided as a vibratory drive for the respective working area of the sieve belts 4 and 9.
  • the electric motor 16 drives a shaft 17 schematically illustrated by its axis, which carries eccentric disks 18 mounted on both sides of the deflecting rollers 5, 6 and 10, 11 or the sieve belts 4 and 9.
  • a push rod 19 acts eccentrically, which articulates on one end of a two-armed swivel arm 20.
  • a second push rod 21 is articulated on the swivel arm 20, which acts as an extension of the push rod 19 with little or no change in the stroke and is articulated at its upper end to a second two-arm swivel arm 22.
  • the swivel arms 20 and 22 are located on both sides of the and sieve belts 9 and 4, respectively, at the level of their working range, as can be seen in particular in FIG. 1, and are in the central region over a total area, as can be seen in FIG with 23 designated pivot pin mounted on the housing.
  • the eccentric disc 18 Upon rotation of the eccentric disc 18, the eccentric rotational movement of the lower end of the push rod 19 is thus converted into a reciprocating movement of the left ends of the pivot arms 20 and 22 in FIG. 1, so that the right ends of the pivot arms 20 and 22, which lie in a central region between the deflection rollers 10 and 11 or 5 and 6, receive an up and down movement.
  • the region of the sieve belts 4 and 9 of the ends of the swivel arms 20 and 22 on both sides of the sieve belts 4 and 9 are pivotally mounted via pivot pins 24 and guide rails 25 which overlap the two lateral edges of the sieve belts 4 and 9 with an inner guide groove.
  • the guide rails 25 transmit on the lateral edges of the sieve belt 4 or 9 an upward and downward movement, the amplitude of which by suitable selection of the eccentricity on the eccentric disc 18 and the transmission ratio in the gear train to the guide rails suitable size is adjustable, while the frequency depends on the speed of the eccentric 18.
  • the guide rails 25 are freely rotatable on the pivot pin 24, with the exception of the up and down movement, they do not exert any harmful constraining forces on the sieve belt 4 or 9.
  • the guide rails 25 In order to enable the oscillating movement to be transmitted as gently as possible to the sieve belts 4 and 9, the guide rails 25 have a considerable length in the example of almost half the distance between the deflection rollers 5 and 6 or 10 and 11. Since the good is continuously conveyed on the sieve belt 4 or 9, the vibratory drive serves only to change the mutual position of the individual good pieces in such a way that each good piece has the opportunity to fall through one of the sorting squares and not from neighboring good particles of the opening of the sorting square is held.
  • the vibratory drive can therefore be of a comparatively low amplitude in a gentle manner.
  • another gentle effect results from the fact that the sorting drive only runs intermittently, for example! is only started for a very short time at intervals of several seconds.
  • the Gu running on the sieve belts 4 and 9 is: exposed to even lower vibrations and therefore particularly protected.
  • the time intervals for the short-term work of the oscillating drive only need to be selected such that, based on test results, the respective sizes on the sieve belts 4 and 9 are adequately sorted out, i.e.
  • the diameter of the deflecting rollers is 6 and 11,300 mm, and it has been shown that with such a large diameter, when working with common goods such as, in particular, potatoes, squeezing in the squares of seated potatoes or the like no longer occurs, but rather this rather, be carefully lifted from the surface of the deflection roller itself.
  • the front deflecting rollers 5 and 10 are also of the same diameter, since this is expedient for reasons of manufacture and storage and moreover increases the installation space available for the conveyors 13 and 14.
  • FIG. 6 An alternative embodiment for driving a sorting machine according to the invention is illustrated in FIG. 6.
  • the eccentric disk is designated by 18, which, however, only has to be present as a single disk and is articulatedly connected to a push rod 19a which articulates on a drive lever 26 of a ratchet drive 27 or the like.
  • the arrangement can be such that, for example in the upward stroke of the push rod 19a, the drive lever 26 transmits drive torque to the associated deflecting roller, while the downward movement takes place at idle speed, so that with each revolution of the eccentric disc 18 the associated screen belt, in For example, a sieve belt 4a deflected over deflection rollers 5a and 6a is transported in sections.
  • a plurality of deflecting rollers can be driven in the manner described with a single eccentric disk 18 and with a single push rod 19a, the associated sieve belts being arranged laterally and in terms of height instead of directly below one another as in the embodiment according to FIGS. 1 to 3 can be that the drive for, for example, two guide rollers can be conveniently summarized.
  • the sieve belt 4 shown here by way of example has longitudinal bars 29 and transverse bars 30 which cross one another and thus limit the sorting squares.
  • the longitudinal bars 29 have the same cross section as the transverse bars 3Q. 4 and 5, the upper side of the rods 29 and 30 are softly rounded, while on the opposite side a support surface 32 is provided, which is in the same plane for all rods 29 and 30 and surface pressure peaks in the deflection at the Deflecting rollers 4 and 5 avoids.
  • a clean guidance of the good particles in the sorting squares and a clear definition of the square sizes results if, as is shown in FIGS.
  • the contact surface corresponds to the maximum sectional area of the rods parallel to the deflection axis.
  • the bars are thus rectangular or square in cross-section, but the square on the outer sides is strongly rounded, for example in the manner of a circular arc.
  • the base material for the rods 29 and 30 is any elastic, comparatively soft material, which does not cause any damage to the good particles even when impacted by the good particles, as occurs in the sorting machine. Rubber with a suitable hardness, in particular a hardness of around 60 Shore A (in accordance with DIN 53 505) is particularly suitable for this.
  • Such a rod made of rubber can be bent practically infinitely often ' around the circumference of the deflecting rollers 5 and 6 without showing any signs of wear due to the flexing work.
  • the entire sieve belt 4 or at least larger sections thereof can be produced in one piece in a suitable form and then vulcanized, as is known per se in rubber production. This results in the possibility of making the screen belt cost, with the additional advantage of the integral nature expressed by the fact that no introduced in the sorting machine foreign objects such as sand particles od. Dg l. can exert a wear-and-tear effect on parts that are movable against each other.
  • a sieve belt consisting entirely of rubber of a suitable softness would require additional supports in order to be able to support the delivered good particles on the large area visible in FIG. 3 between the deflecting rollers 5 and 6 and the lateral guide rails S and moreover from the edges Vibrating movement is clean and defined to transfer to the good particles.
  • additional supports which not only cause additional effort and hinder the sorting performance, but can also give rise to damage to the good particles
  • a core 33 made of dimensionally stable material with sufficient load-bearing capacity such as spring steel is embedded in the cross bars 30.
  • the remaining jacket 34 surrounds the cross section of the core 33 on all sides, so that a crossbar 30 acts on its surface like a solid rubber rod and a sufficient thickness of the cushioning jacket 34 is also ensured around the core.
  • the core 33 can be easily incorporated in the form in the production of the sieve belt by casting or extrusion coating, which is particularly with regard to the rectilinear design of the rods 29 and in particular 30 does not lead to any difficulties and increases the workload for the production only very slightly. This creates such an intimate bond between the core 33 and the jacket 34 that no relative movements and therefore no wear occur.
  • the screen belt 4 shown in detail in FIG. 3 from above consists of longitudinal rods 29 made only of rubber and transverse rods 30 with a core 33 made of spring steel or Like. So that the sieve belt 4 in the guide rails 25 and around the guide rollers 5 and 6 around like a traveling grate with rigid cross bars.
  • a core can also be arranged in the longitudinal bars 29, which must, however, be correspondingly flexible, but can absorb tensile loads. However, this is not necessary if separate elements are provided for transmitting the tensile forces, for which the two edges of the sieve belt 4 are suitable. In the manner shown in FIGS.
  • the edges of the sieve belt 4 running in the guide grooves of the guide rails 25 are provided with a belt 35 which can withstand tensile loads and which consists of a tension-resistant fabric or has a fabric insert, in particular steel cord, for example.
  • a belt 35 which can withstand tensile loads and which consists of a tension-resistant fabric or has a fabric insert, in particular steel cord, for example.
  • the cores 33 of the cross bars 30 can be extended laterally beyond the area of the rubber jacket 34, so that they engage fully in the area of the lateral bands 35 and are embedded in them.
  • these belts can also be added directly in the form during the production of the sieve belt 4, as is known per se in the rubber industry. Since the guide grooves of the guide rails 25 overlap the side edges or the bands 35 far enough in the manner indicated by dash-dotted lines in FIG.
  • the bands 35 can be given an additional end reinforcement 36, indicated in FIG. 5, which secures the end faces and prevents the end spring rods or souls 33 from being pulled out of the associated band 35 in the longitudinal direction in the event of excessive tensile loading will.
  • the clamps 37 can be covered with rubber 38 or the like at least on their outer sides, a complete covering being provided in the illustrated embodiment, which is made similar to the covering of the souls 33 of the cross bars 30 can.
  • the brackets can be prefabricated in a U-shape and bent with a suitable tool at their ends 39 over the end bars 30 or bent round the individual cross bar 30 or after removal of the rubber jacket 34 at this point around the naked core 33 , .With such a tool, the Width of the U can be changed to achieve the desired band tension.

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  • Combined Means For Separation Of Solids (AREA)
EP79103452A 1978-09-14 1979-09-14 Tamis à bandes de criblage circulant autour de poulies de renvoi Withdrawn EP0009692A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19782840016 DE2840016B1 (de) 1978-09-14 1978-09-14 Sortiermaschine,insbesondere zur Quadratsortierung von landwirtschaftlichen Produkten
DE2840016 1978-09-14

Publications (1)

Publication Number Publication Date
EP0009692A1 true EP0009692A1 (fr) 1980-04-16

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EP79103452A Withdrawn EP0009692A1 (fr) 1978-09-14 1979-09-14 Tamis à bandes de criblage circulant autour de poulies de renvoi

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EP (1) EP0009692A1 (fr)
DE (1) DE2840016B1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4673453A (en) * 1983-05-04 1987-06-16 Ab Hydro Betong Method of making a structural body
JPS6311724A (ja) * 1986-06-30 1988-01-19 Toa Harbor Works Co Ltd 水と土砂の分離方法及び装置
GB2220592A (en) * 1988-06-02 1990-01-17 Norlyk & Soenner As Separating soil from root crops
DE19511931C1 (de) * 1995-03-31 1996-01-18 Fuelling Rainer Dr Vorrichtung zum dosierten Fördern von kontaminiertem Boden- oder Schuttmaterial sowie zum Aussortieren von eine bestimmte Größe überschreitenden Steinen
NL1000270C2 (en) * 1995-05-01 1996-02-02 Petrus Cornelius Maria Verbrug Mechanism for sorting mushrooms - has endless conveyor belt with openings of different sizes for mushrooms
CN115349566A (zh) * 2022-07-19 2022-11-18 河北喜之郎食品有限公司 一种具有茶叶蛋白提取功能的茶粉制备装置及工艺

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE504625A (fr) *
US2387918A (en) * 1944-05-04 1945-10-30 Thorval J Lockwood Potato grader chain
US2518043A (en) * 1946-05-31 1950-08-08 Frank J Mathews Dry ore concentrator
DE949210C (de) * 1953-05-23 1956-09-13 Albert Wehner Siebanlage mit einem endlosen umlaufenden Siebband
GB975750A (en) * 1962-01-12 1964-11-18 Karl Plate Flexible sieve of tubular or endless belt form
FR1424200A (fr) * 1964-02-15 1966-01-07 Ruhrkunststoff G M B H Perfectionnements apportés aux tamis à fond élastique en caoutchouc ou en matière plastique
GB1029120A (en) * 1963-09-05 1966-05-11 Helmut Eduard Ehregott Klinkic Improvements in or relating to conveyors

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE504625A (fr) *
US2387918A (en) * 1944-05-04 1945-10-30 Thorval J Lockwood Potato grader chain
US2518043A (en) * 1946-05-31 1950-08-08 Frank J Mathews Dry ore concentrator
DE949210C (de) * 1953-05-23 1956-09-13 Albert Wehner Siebanlage mit einem endlosen umlaufenden Siebband
GB975750A (en) * 1962-01-12 1964-11-18 Karl Plate Flexible sieve of tubular or endless belt form
GB1029120A (en) * 1963-09-05 1966-05-11 Helmut Eduard Ehregott Klinkic Improvements in or relating to conveyors
FR1424200A (fr) * 1964-02-15 1966-01-07 Ruhrkunststoff G M B H Perfectionnements apportés aux tamis à fond élastique en caoutchouc ou en matière plastique

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4673453A (en) * 1983-05-04 1987-06-16 Ab Hydro Betong Method of making a structural body
JPS6311724A (ja) * 1986-06-30 1988-01-19 Toa Harbor Works Co Ltd 水と土砂の分離方法及び装置
GB2220592A (en) * 1988-06-02 1990-01-17 Norlyk & Soenner As Separating soil from root crops
DE19511931C1 (de) * 1995-03-31 1996-01-18 Fuelling Rainer Dr Vorrichtung zum dosierten Fördern von kontaminiertem Boden- oder Schuttmaterial sowie zum Aussortieren von eine bestimmte Größe überschreitenden Steinen
NL1000270C2 (en) * 1995-05-01 1996-02-02 Petrus Cornelius Maria Verbrug Mechanism for sorting mushrooms - has endless conveyor belt with openings of different sizes for mushrooms
CN115349566A (zh) * 2022-07-19 2022-11-18 河北喜之郎食品有限公司 一种具有茶叶蛋白提取功能的茶粉制备装置及工艺
CN115349566B (zh) * 2022-07-19 2024-03-12 河北喜之郎食品有限公司 一种具有茶叶蛋白提取功能的茶粉制备装置及工艺

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