EP3209434B1 - Nettoyeur de tamis, unité de tamis et procédé - Google Patents

Nettoyeur de tamis, unité de tamis et procédé Download PDF

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Publication number
EP3209434B1
EP3209434B1 EP15784673.4A EP15784673A EP3209434B1 EP 3209434 B1 EP3209434 B1 EP 3209434B1 EP 15784673 A EP15784673 A EP 15784673A EP 3209434 B1 EP3209434 B1 EP 3209434B1
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EP
European Patent Office
Prior art keywords
cleaning
sieve
cleaner
brushless
screen
Prior art date
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Active
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EP15784673.4A
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German (de)
English (en)
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EP3209434A1 (fr
Inventor
Simon KÜNZLE
Nicolas EGGER
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Buehler AG
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Buehler AG
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Priority to PL15784673T priority Critical patent/PL3209434T3/pl
Publication of EP3209434A1 publication Critical patent/EP3209434A1/fr
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    • 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
    • B07B1/50—Cleaning
    • B07B1/54—Cleaning with beating devices

Definitions

  • the invention relates to a sieve cleaner for cleaning a sieve surface of a sieve box which contains the sieve surface and a sieve bottom.
  • a sieve cleaner can be designed to clean a sieve surface of a sieve box of a plan sifter.
  • the invention also relates to a sieve unit and a method for upgrading or converting a sieve box.
  • Movable sieve cleaners which can be placed on a sieve bottom of a sieve box and with the help of which a sieve surface of the sieve box can be cleaned are known per se.
  • Such sieves are stackable and can be arranged, for example, as a sieve stack in plan sifters in order to separate or sift granular to floury products into different fractions and qualities.
  • the sieve cleaners absorb the oscillating movements of the plansifter and the sieve boxes and thereby randomly move around on the sieve base, repeatedly bouncing back against the sieve frame.
  • WO 2010/045284 A1 disclosed. These screen cleaners are composed of simple geometric figures such as spheres, cylinders and polyhedra. Tests with at least similar screen cleaners have shown, however, that these tend to clog the screen surface.
  • the screen cleaner should clean the screen surface as efficiently as possible without damaging it or the screen frame, while also complying with the hygiene requirements the processing of food should be complied with.
  • screen cleaners with silicone rags or aluminum pins were used instead of knobs or brushes, eccentric centers of gravity were created, the elastic properties were varied, influences of the dimensions and their proportions were evaluated, etc. Screen cleaner proved to be particularly beneficial.
  • a screen cleaner is designed for cleaning a sieve surface of a sieve box which contains the sieve surface and a sieve bottom.
  • the screen surface can be a screen mesh, for example.
  • the screen cleaner can be designed, for example, to clean a screen surface, such as a screen mesh, a screen box of a plan sifter.
  • the sieve cleaner contains a wobble foot which extends along a main axis of the sieve cleaner and is designed in such a way that it can be placed on the sieve bottom and the sieve cleaner can be tilted around this wobble foot.
  • the named main axis can be, for example, a gravity axis of the screen cleaner.
  • the screen cleaner contains at least one cleaning element with a cleaning area, the or each cleaning area having a plurality of cleaning surfaces for cleaning the screen surface.
  • the cleaning surfaces are each designed for at least linear contact with the screen surface and are separated from one another by slots formed in the cleaning area.
  • a line-shaped contact is understood here and in the following to be a one-dimensional contact - in contrast to a point-shaped, i.e. zero-dimensional contact that exists between a rounded knob or bristle end known from the prior art and a flat screen surface.
  • the phrase “at least linearly” also includes two-dimensional, that is, two-dimensional, contacts.
  • the at least linear contact leads to the fact that the cleaning surfaces sweep over a flat, that is two-dimensional area of the sieve surface when they rotate about the main axis of the sieve cleaner. In this way, a significant part of the cleaning is achieved by wiping off the fine material from the sieve surface, which has passed through it. Knocking, as is mainly caused by the knobs known from the prior art, can therefore be neglected. This also reduces the damage to the screen surface associated with knocking off.
  • the slots formed between the cleaning surfaces ensure that the fine material can partially pass through these slots. This prevents the fine material from being merely brushed into the sieve surface by the cleaning areas or the sieve surface from being pushed away by the sieve cleaner due to the accumulating fine material.
  • the screen cleaners according to the invention therefore have the advantage that they can clean the screen surface at least as well or even more efficiently than those from the prior art were able to do.
  • This advantage also exists for sieve surfaces, in particular sieve fabrics, with smaller mesh sizes, for which sieve cleaners with brushes were used in the prior art, in particular for sieve surfaces with mesh sizes of less than 250 ⁇ m, preferably less than 180 ⁇ m, more preferably less than 150 ⁇ m , even more preferably less than 125 ⁇ m and particularly preferably less than 90 ⁇ m.
  • the wobble foot can be rounded, which simplifies tilting and increases the freedom of movement of the screen cleaner.
  • the cleaning area does not contain brushes. As no bristles can tear out, the screen cleaner can meet hygiene requirements.
  • the slots extend in a slot direction which, with a radial direction with respect to the main axis, enclose an angle which is in the range from 30 ° to 60 ° and particularly preferably from 40 ° to 50 ° and very particularly preferably 45 °. Such angles provide more wiping edges, which are particularly useful in different directions of movement.
  • the cleaning surfaces When rotating about the main axis, the cleaning surfaces each sweep over an imaginary cleaning line in a radial direction with respect to the main axis.
  • the ratio of the radial distance between two adjacent cleaning lines and the radial length of the cleaning lines is preferably in the range of 50% and 100%, particularly preferably 90% and 95%.
  • the cleaning lines of the individual cleaning surfaces adjoin one another directly or even overlap one another.
  • the cleaning elements in particular the preferred cleaning arms explained below, can have a height parallel to the main axis, and the slots can have a depth parallel to the main axis.
  • the ratio between the depth of the slots and the height of the cleaning elements, in particular the cleaning arms, is preferably greater than 0% and less than or equal to 20%; the ratio is preferably about 10%. The greater this ratio, the lower the sliding friction between the screen cleaner and the screen surface and the setting of the fine material and at a given height of the cleaning elements the less there is the risk of the screen cleaner coming to a standstill. On the other hand, ratios that are too large would lead to the fine material getting stuck in the slots to a high degree.
  • the slots of one and the same cleaning element advantageously run parallel to one another.
  • the screen cleaner particularly advantageously has a central area containing the main axis with an upper side opposite the wobble foot, which is recessed in relation to the cleaning surfaces in such a way that it cannot be brought into contact with the screen surface, in particular not in contact with an essentially flat screen surface is.
  • the above-mentioned upper side does not form a cleaning surface for cleaning the sieve surface. This is because cleaning surfaces that are present on the upper side of the central area and are not recessed with respect to the cleaning surfaces of the cleaning elements would lead to these coming into contact with the screen surface even when the screen cleaner was not tilted. This would slow down or even jam the sieve cleaner between the sieve bottom and the sieve surface.
  • the screen cleaner preferably contains at least three cleaning elements, in particular at least three cleaning arms as described in detail below.
  • each of the at least three cleaning elements is provided with a respective cleaning area, each cleaning area having a plurality of cleaning surfaces for cleaning the sieve surface.
  • the cleaning surfaces are arranged and designed in such a way that when the sieve box is at a standstill (i.e. especially in the absence of the movements of the sieve box that support the sieving) and when the sieve surface is taut, the cleaning surfaces of at least two of the cleaning elements, but not the cleaning surfaces of all of the cleaning elements, are in contact at the same time with the sieve surface are or can be brought are, whereby essentially all cleaning surfaces of these cleaning elements are or can be brought into contact with the screen surface.
  • essentially all of the cleaning surfaces of these cleaning elements are in contact with the sieve surface.
  • “Essentially all” means that at least 50%, preferably at least 70%, more preferably at least 90% and particularly preferably all cleaning surfaces of the two cleaning elements mentioned are in contact with the sieve surface. In this embodiment it is therefore excluded, for example, that of two cleaning elements only a single cleaning surface is in contact with the sieve surface. In this way, the contact with the sieve surface and thus also the cleaning effect are increased.
  • the screen cleaner is advantageously made of a sufficiently elastic material.
  • a relatively soft polyurethane such as from a Elastollan ®, which is available from BASF.
  • Elastollan ® is also permitted for the processing of food, such as Grain or flour products.
  • Elastic materials have the advantage, among other things, that a sieve frame of the sieve box is less damaged when the sieve cleaner hits it.
  • the screen cleaners according to the invention can be produced, for example, in an injection molding process.
  • the screen cleaner also advantageously has an odd number of cleaning elements, in particular cleaning arms.
  • the number mentioned is preferably at least three and particularly preferably exactly three.
  • the cleaning elements are also preferably distributed uniformly in the circumferential direction. This structure is particularly simple and enables an advantageous compromise between the cleaning effect and the free space formed between the cleaning elements, in particular the cleaning arms.
  • the cleaning element (s) is / are designed as cleaning arm (s) which extend radially outward from a central region of the screen cleaner containing the main axis. This also contributes to the mentioned advantageous compromise.
  • the cleaning surfaces are arranged in a row along the cleaning arms. This also achieves a sufficiently low sliding friction between the screen cleaner and the screen surface, which prevents the slots from being clogged by the fine material and also prevents the screen cleaner from coming to a standstill.
  • the cleaning arms can have a length which is in the range from 5 to 15 cm, preferably 6.5 to 7.5 cm.
  • the cleaning areas also preferably have a radial length, the ratio of this radial length to the length of the cleaning arms being in the range from 50 to 100% and preferably about 85%.
  • Impact protectors can be arranged at the outer ends of the cleaning elements, in particular the cleaning arms. This can reduce the risk that the cleaning surfaces will wear out due to contact with the sieve frame.
  • the impact guards can be designed, for example, as reinforcements of the cleaning elements in a plane running perpendicular to the main axis.
  • the sieve cleaner can have at least one scraper for clearing out fine material located on the sieve bottom through a clearing opening formed in a sieve frame of the sieve box.
  • a clearing opening is advantageously arranged at the end of a cleaning arm.
  • the screen cleaner is preferably designed in one piece. This makes it easier to manufacture and further reduces the risk of individual components being lost.
  • Another aspect of the invention relates to a sieve unit according to claim 10.
  • the screen cleaner of the screen unit according to the invention has at least three cleaning elements, in particular three cleaning arms, with a respective cleaning area, each cleaning area having a plurality of cleaning surfaces for cleaning the screen surface.
  • the cleaning surfaces are arranged and designed in such a way that when the sieve box is at a standstill (i.e. in particular in the absence of the movements of the sieve box that support the sieving) and when the sieve surface is taut, the cleaning surfaces of at least two of the cleaning elements, but not the cleaning surfaces of all cleaning elements are or can be brought into contact with the sieve surface at the same time, in which case essentially all cleaning surfaces of these cleaning elements are or can be brought into contact with the sieve surface.
  • the sieve cleaner has at least three cleaning elements and the sieve cleaner and the sieve box are designed and coordinated in such a way that when the sieve box is at a standstill (i.e. in particular in the absence of the movements of the sieve box that support the sieving), with correctly clamped sieve surface and when the wobble foot rests on the sieve bottom, the cleaning surfaces of all cleaning elements are at a distance of less than 5 mm, preferably less than 3 mm, particularly preferably less than 1.4 mm from the sieve surface. Because of this small maximum distance from the sieve surface, the speed component that is perpendicular to the sieve surface, i.e. in particular vertical, is limited with which the cleaning surfaces hit the sieve surface when the sieve cleaner tilts around the wobble foot.
  • the mesh size of the screen surface in particular of the screen fabric, is less than 250 ⁇ m, preferably less than 180 ⁇ m, more preferably less than 150 ⁇ m, even more preferably less than 125 ⁇ m and particularly preferably smaller than 90 ⁇ m.
  • Another aspect of the invention relates to a method for upgrading or converting a sieve box according to claim 12.
  • a sieve cleaner according to the invention is placed on a sieve bottom of the sieve box in such a way that a sieve unit as described above is formed.
  • the illustrated first embodiment of the screen cleaner 1 ' not according to the invention, contains a wobble foot, which cannot be seen here. This extends along a main axis A 'of the screen cleaner 1', which at the same time also forms one of its axes of gravity. He is trained like the wobble foot 5 in the fourth exemplary embodiment according to the invention Figures 5 to 9 .
  • each of the cleaning arms 6 ' From a central region 10 'of the screen cleaner 1', three cleaning elements, designed as cleaning arms 6 ', extend which are distributed uniformly in the circumferential direction around the center of gravity A'. Each of the cleaning arms 6 'contains a respective cleaning area 7'. Each of the cleaning areas 7 'has a large number of rectangular cleaning surfaces 8' which run perpendicular to the center of gravity A 'and are each designed for flat contact with a screen surface (not shown here) (see FIG Figure 10 which shows a sieve box and a sieve cleaner according to the invention arranged therein). The cleaning surfaces 8 'are separated from one another by the slots 9' formed in the respective cleaning area 7 '.
  • the slots 9 'extend transversely to the longitudinal direction of the cleaning arms 6'.
  • Cleaning areas 18 ' are also present in the area between two of the cleaning arms 6', that is to say in the central area 10 'of the screen cleaner 1'.
  • the middle area 10 ' contains three openings 19' through which fine material can pass.
  • the second screen cleaner 1 "according to the invention, not according to the invention Figure 2 differs from the one in Figure 1 shown by the fact that in In the middle area 10 "neither cleaning areas 18 'nor openings 19' are present. Due to the absence of cleaning areas 18 'in the middle area 10", contact between the screen cleaner 1 "and the screen surface occurs only when the screen cleaner 1" is tilted. This can prevent the sieve cleaner 1 ′′ from being braked or even jammed between the sieve bottom and the sieve surface before it can even tip over.
  • Figure 3 shows a third screen cleaner 1 according to the invention, which also contains three cleaning arms 6 ′′′ evenly distributed in the circumferential direction.
  • the screen cleaner 1 ′′′ also has a wobble foot 5 ′′′, which is rounded at the lower end, which makes it easier to tilt the screen cleaner 1 ′′′.
  • the slots 9 formed between the cleaning surfaces 8 ′′′ run in a slot direction S ′′′ which enclose an angle ⁇ ′′′ of 45 ° with a radial direction R ′′′ with respect to the center of gravity A ′′′.
  • This angle creates a particularly advantageous compromise between the line support and the sliding friction between the screen cleaner 1 ′′′ and the screen surface.
  • reinforcements 11 ′′′ are provided at the ends of the cleaning arms 6 in a plane perpendicular to the main axis A ′′′, which act as impact protectors and reduce the risk of damage to the cleaning areas when the screen cleaner 1 ′′′ hits a screen frame. This is done using Figure 4 explained in more detail. This shows on the left a plan view of a section of a cleaning arm 6 ′′ of the not according to the invention
  • Sieve cleaner 1 "according to Figure 2 and on the right a top view of a section of a cleaning arm 6 ′′′ of the screen cleaner 1 ′′′ according to Figure 3 .
  • the cleaning surfaces 8 ′′ and 8 ′′′ each sweep an imaginary cleaning line L ′′ or L ′′′. Due to the inclination of the cleaning surfaces 8 ′′′ and the slots 9 ′′′ for the third embodiment shown on the right, the ratio of the radial length of the cleaning lines L ′′ and the distance between two adjacent cleaning lines L ′′ is greater than This is the case with the second exemplary embodiment shown on the left. The line contact is thus greater in the third exemplary embodiment than in the second. For this reason, the third screen cleaner 1 effects more efficient cleaning than the first screen cleaner 1 ′′ not according to the invention.
  • a preferred screen cleaner 1 is shown in a fourth embodiment.
  • This sieve cleaner 1 can for instance be manufactured integrally by an injection molding process from the above-mentioned Elastollan ®.
  • This screen cleaner 1 also has a wobble foot 5 which extends along a center of gravity axis A, which forms a main axis of the screen cleaner 1.
  • the wobble foot 5 is designed in such a way that it can be placed on a sieve bottom and the sieve cleaner 1 can be tilted around the wobble foot 5.
  • the wobble foot 5 is also rounded at the lower end, as a result of which the tilting of the sieve cleaner 1 is simplified.
  • the three cleaning arms 6 are evenly distributed around the center of gravity A in the circumferential direction.
  • reinforcements 11 are provided at the ends of the cleaning arms 6 in a plane perpendicular to the main axis A, which act as impact protectors and reduce the risk of damage to the cleaning areas when the screen cleaner 1 hits a screen frame.
  • the top 15 of the central region 10 is recessed in relation to the cleaning surfaces 8 of the cleaning arms 6 in such a way that this top 15 cannot be brought into contact with a sieve surface.
  • Figure 2 have been explained. Furthermore, the screen cleaner 1 contains a clearer 12, with the aid of which fine material located on a sieve bottom can be cleared out through a clearing opening formed in a sieve frame of the sieve box.
  • Figure 6 shows a first side view of the fourth screen cleaner 1, Figure 7 a second side view and Figure 8 a top view.
  • Figure 9 shows a detailed sectional view along the line AA according to FIG Figure 8 . It can be seen that the cleaning surfaces 8 are rounded. However, since they run in a straight line perpendicular to this sectional view, linear contact with a flat screen surface is still possible.
  • the ratio between this depth t and the height h of the cleaning arms 6 is approximately 10%.
  • a sieve unit which contains a sieve box 3 and one of the preferred sieve cleaners 1 according to the invention.
  • the sieve box 3 has a horizontal sieve bottom 4, a sieve frame 13 extending therefrom in the vertical direction and a sieve surface designed as a sieve fabric 2, which is stretched over the sieve frame 13.
  • the sieve cleaner 1 is placed on the sieve bottom 4 with its wobble foot 5.

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  • Combined Means For Separation Of Solids (AREA)
  • Detergent Compositions (AREA)

Claims (12)

  1. Nettoyeur de tamis sans brosse (1 ; 1' ; 1" ; 1‴) pour nettoyer une surface de tamisage (2) d'une boîte à tamis (3) comprenant la surface de tamisage (2) et un fond de tamis (4), comprenant
    - un pied oscillant(5 ; 5‴) s'étendant le long d'un axe principal (A ; A' ; A" ; A‴) du nettoyeur de tamis sans brosse (1 ; 1' ; 1" ; 1‴) et configuré pour être placé sur le fond de tamis (4) et pour faire basculer le nettoyeur de tamis sans brosse (1 ; 1' ; 1" ; 1‴) autour du pied oscillant (5 ; 5‴) ;
    - au moins un élément de nettoyage (6 ; 6' ; 6" ; 6‴) comprenant une zone nettoyante sans brosse (7 ; 7' ; 7" ; 7‴) qui ne contient pas de brosse, la ou chaque zone nettoyante (7 ; 7' ; 7" ; 7‴) comprenant une pluralité de surfaces de nettoyage (8 ; 8' ; 8" ; 8‴) pour nettoyer la surface de tamisage(2) ;
    caractérisé en ce que
    chaqu'une desdite pluralité de surfaces de nettoyage (8 ; 8' ; 8" ; 8‴) est adaptée pour au moins un contact linéaire avec ladite surface de tamisage (2), dans lequel lors de la rotation dudit nettoyeur de tamis sans brosse (1 ; 1' ; 1" ; 1‴) autour de l'axe principal (A ; A' ; A" ; A‴), chaque surface individuelle de la pluralité de surfaces de nettoyage (8 ; 8' ; 8" ; 8‴) balaie une région plane de la surface de tamisage (2), et en ce que chaque surface individuelle de la pluralité de surfaces de nettoyage (8 ; 8' ; 8" ; 8‴) est séparée de chaque surface de nettoyage adjacente (8 ; 8' ; 8" ; 8‴) par une fente (9 ; 9' ; 9" ; 9‴) formée dans la zone nettoyante (7 ; 7' ; 7" ; 7‴), et en ce que chaque fente (9 ; 9‴) s'étend dans une direction de fente (S ; S‴) qui est à un angle (α‴) dans la gamme de 30° à 60° par rapport à une direction radiale (R ; R‴) relatif à l'axe principal (A ; A‴).
  2. Nettoyeur de tamis sans brosse (1 ; 1' ; 1" ; 1‴) selon la revendication 1,
    caractérisé en ce que
    chacune des régions planes de la surface de tamisage (2) balayées par les surfaces de nettoyage (8 ; 8' ; 8" ; 8‴) définit une ligne de nettoyage théorique (L" ; L‴) qui coïncide avec une dimension radiale de la région plane de la surface de tamisage (2) dans une direction radiale (R ; R" ; A‴) par rapport à l'axe principal (A ; A' ; A" ; A‴), et dans lequel une distance radiale entre deux lignes de nettoyage adjacentes (L" ; L‴) est soit plus courte que la longueur radiale des lignes de nettoyage (L" ; L‴), soit inexistante.
  3. Nettoyeur de tamis sans brosse(1 ; 1' ; 1" ; 1‴) selon l'une quelconque des revendications précédentes,
    caractérisé en ce que les
    éléments de nettoyage (6 ; 6' ; 6" ; 6‴) ont une hauteur (h) parallèle à l'axe principal (A ; A' ; A" ; A‴) et les fentes (9 ; 9' ; 9" ; 9‴) ont une profondeur (t) parallèle à l'axe principal (A), la profondeur (t) des fentes (9 ; 9' ; 9" ; 9‴) étant supérieure à 0% et inférieure ou égale à 20% de la hauteur (h) des éléments de nettoyage (6 ; 6' ; 6" ; 6‴).
  4. Nettoyeur de tamis sans brosse (1 ; 1") selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il présente une région centrale (10 ; 10") contenant l'axe principal (A ; A' ; A‴) et présentant une face supérieure (15 ; 15") opposée au pied oscillant (5, 5‴), ladite face supérieure étant en retrait par rapport aux surfaces de nettoyage (8 ; 8") de manière à ne pas pouvoir être mise en contact avec la surface de tamisage (2).
  5. Nettoyeur de tamis sans brosse (1 ; 1' ; 1" ; 1‴) selon l'une quelconque des revendications précédentes, caractérisé par au moins
    trois éléments de nettoyage (6 ; 6' ; 6" ; 6‴) ayant respectivement une zone nettoyante (7 ; 7' ; 7" ; 7‴), chaque zone nettoyante (7 ; 7' ; 7" ; 7‴) ayant une pluralité de surfaces de nettoyage (8 ; 8' ; 8" ; 8‴) pour nettoyer la surface de tamisage(2), et les surfaces de nettoyage (8 ; 8' ; 8") ; 8‴) sont disposées et formées de telle sorte que, lorsque le nettoyeur de tamis sans brosse (1 ; 1' ; 1" ; 1‴) est placé sur le fond du tamis (4) et lorsque la boîte à tamis (3) est à l'arrêt et la surface du tamis (2) est tendue, au moins 50% des surfaces de nettoyage (8 ; 8' ; 8" ; 8‴) d'au moins deux éléments de nettoyage (6 ; 6' ; 6" ; 6‴), mais pas les surfaces de nettoyage (8 ; 8' ; 8" ; 8‴) de tous les éléments de nettoyage (6 ; 6' ; 6" ; 6‴), sont simultanément en contact avec la surface de tamisage (2).
  6. Nettoyeur de tamis sans brosse (1 ; 1' ; 1" ; 1‴) selon l'une quelconque des revendications précédentes, caractérisé en ce que le nettoyeur de tamis sans brosse (1 ; 1' ; 1" ; 1‴) présente un nombre impair d'éléments de nettoyage (6 ; 6' ; 6" ; 6‴).
  7. Nettoyeur de tamis sans brosse (1 ; 1' ; 1" ; 1‴) selon l'une quelconque des revendications précédentes, caractérisé en ce que le
    ou les éléments de nettoyage (6 ; 6' ; 6" ; 6‴) sont conçus comme un ou des bras nettoyante(6 ; 6' ; 6") ; 6‴) qui s'étendent radialement vers l'extérieur à partir d'une région centrale (10 ; 10' ; 10" ; 10‴) du nettoyeur de tamis sans brosse (1 ; 1' ; 1" ; 1‴) contenant l'axe principal (A ; A' ; A" ; A‴).
  8. Nettoyeur de tamis sans brosse (1 ; 1" ; 1‴) selon la revendication 7,
    caractérisé en ce que les
    surfaces de nettoyage (8 ; 8" ; 8‴) sont disposées en une seule rangée le long des bras nettoyantes(6 ; 6" ; 6‴).
  9. Nettoyeur de tamis sans brosse (1 ; 1' ; 1" ; 1‴) selon l'une quelconque des revendications 7 et 8,
    caractérisé en ce que les bras nettoyantes (6 ; 6' ; 6" ; 6‴) ont une longueur (l 1, l 2) comprise entre 5 et 15 cm.
  10. Dispositif de tamisage, comprenant
    - au moins une boîte à tamis (3) avec un fond de tamis (4) et une surface de tamisage (2) ;
    - au moins un nettoyeur de tamis sans brosse (1 ; 1' ; 1" ; 1‴) qui est placé sur le fond de tamis (4),
    caractérisé en ce que
    le nettoyeur de tamis sans brosse (1 ; 1' ; 1" ; 1‴) possède un pied oscillant (5 ; 5‴) qui s'étend le long d'un axe principal (A ; A' ; A" ; A‴) du nettoyeur de tamis sans brosse (1 ; 1' ; 1" ; 1‴) et est conçu de tel manière à pouvoir être placé sur le fond de tamis(4) et que le nettoyeur de tamis sans brosse (1 ; 1' ; 1" ; 1‴) peut être incliné autour du pied oscillant (5 ; 5‴),
    et que le nettoyeur de tamis sans brosse (1 ; 1' ; 1" ; 1‴) comprend au moins trois éléments de nettoyage (6 ; 6' ; 6" ; 6‴) avec respectivement une zone nettoyante (7 ; 7' ; 7" ; 7‴), chaque zone nettoyante (7 ; 7' ; 7" ; 7‴) comprenant une pluralité de surfaces de nettoyage (8 ; 8' ; 8" ; 8‴) pour nettoyer la surface de tamisage (2), et
    en ce que les surfaces de nettoyage (8 ; 8' ; 8" ; 8‴) sont disposées et formées de telle sorte que, lorsque le nettoyeur de tamis sans brosse (1 ; 1' ; 1" ; 1‴) est placé sur le fond de tamis (4), lorsque la boîte à tamis (3) est à l'arrêt et lorsque la surface de tamisage (2) est tendue, au moins 50% des surfaces de nettoyage (8 ; 8' ; 8" ; 8‴) d'au moins deux des éléments de nettoyage (6 ; 6' ; 6" ; 6‴), mais pas les surfaces de nettoyage (8 ; 8' ; 8" ; 8‴) de tous les éléments de nettoyage (6 ; 6' ; 6" ; 6‴), sont simultanément en contact avec la surface de tamisage (2), et en ce que chaque surface individuelle de la pluralité de surfaces de nettoyage est séparée de chaque surface de nettoyage adjacente par des fentes formées dans la zone nettoyante, et
    en ce que chaque fente (9 ; 9‴) s'étend dans une direction de fente (S ; S‴) qui fait un angle (α‴) dans la plage de 30° à 60° par rapport à une direction radiale (R ; R‴) relatif à l'axe principal (A ; A‴).
  11. Dispositif de tamisage selon la revendication 10, caractérisée en ce que le nettoyeur de tamis sans brosse (1 ; 1' ; 1" ; 1‴) et la boîte à tamis (3) sont conçus de telle sorte que lorsque la boîte à tamis (3) est à l'arrêt, lorsque la surface de tamisage (2) est tendue et lorsque le pied oscillant (5 ; 5‴) repose sur le fond de tamis (4), chacune des surfaces de nettoyage (8 ; 8' ; 8" ; 8‴) de tous les éléments de nettoyage (6 ; 6' ; 6" ; 6‴) se trouve à une distance inférieure a 5 mm de la surface de tamisage (2).
  12. Procédé d'amélioration ou de modification d'une boîte à tamis (3), comprenant une étape consistant à placer un nettoyeur de tamis sans balai (1) selon l'une quelconque des revendications 1 à 9 sur un fond de tamis (4) du boîte à tamis (3) de manière à former un dispositif de tamisage selon l'une quelconque des revendications 10et 11.
EP15784673.4A 2014-10-24 2015-10-22 Nettoyeur de tamis, unité de tamis et procédé Active EP3209434B1 (fr)

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CN (1) CN106999986B (fr)
BR (1) BR112017007915B1 (fr)
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US20170333950A1 (en) 2017-11-23
WO2016062826A1 (fr) 2016-04-28
ES2906574T3 (es) 2022-04-19
BR112017007915A2 (pt) 2018-01-23
RU2017117650A (ru) 2018-11-26
BR112017007915B1 (pt) 2021-06-29
PL3209434T3 (pl) 2022-04-19
CN106999986B (zh) 2019-09-24
KR20170076740A (ko) 2017-07-04
JP6622304B2 (ja) 2019-12-18
KR102003139B1 (ko) 2019-07-23
RU2017117650A3 (fr) 2018-11-26
US10335831B2 (en) 2019-07-02
RU2687727C2 (ru) 2019-05-15
CN106999986A (zh) 2017-08-01
EP3209434A1 (fr) 2017-08-30

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