EP3308866B1 - Hopper comprising a screen with converging slopes - Google Patents

Hopper comprising a screen with converging slopes Download PDF

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Publication number
EP3308866B1
EP3308866B1 EP17196390.3A EP17196390A EP3308866B1 EP 3308866 B1 EP3308866 B1 EP 3308866B1 EP 17196390 A EP17196390 A EP 17196390A EP 3308866 B1 EP3308866 B1 EP 3308866B1
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EP
European Patent Office
Prior art keywords
screen
flow
frame
product
conveying machine
Prior art date
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Application number
EP17196390.3A
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German (de)
French (fr)
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EP3308866A1 (en
Inventor
Jean-Michel SERVAT
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.)
PL2M SAS
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PL2M SAS
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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
    • B07B1/12—Apparatus having only parallel elements
    • 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
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/0887—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing provided with sieves or filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/10—Mixing in containers not actuated to effect the mixing
    • B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
    • B28C5/1238—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers for materials flowing continuously through the mixing device and with incorporated feeding or discharging devices
    • B28C5/1253—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers for materials flowing continuously through the mixing device and with incorporated feeding or discharging devices with discharging devices
    • B28C5/1261—Applying pressure for discharging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/10—Mixing in containers not actuated to effect the mixing
    • B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
    • B28C5/1238—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers for materials flowing continuously through the mixing device and with incorporated feeding or discharging devices
    • B28C5/1292—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers for materials flowing continuously through the mixing device and with incorporated feeding or discharging devices with rotating stirring and feeding or discharging means fixed on the same axis, e.g. in an inclined container fed at its lower part

Definitions

  • the present invention relates to the field of screens configured to equip, for example and without limitation, a hopper. It relates in particular to a screen mounted on a hopper equipping a fluid screed and / or concrete transport machine.
  • a hopper defines a receiving volume making it possible to receive, contain and transport a product, the hopper having an introduction opening opening into the receiving volume; the hopper is also configured to ensure a flow of said product towards a delivery line, the delivery line comprising means for moving the product in a transport sheath, such as a transmission shaft with turns or a pump with progressing cavities, so as to move the product to its place of spreading.
  • a transport sheath such as a transmission shaft with turns or a pump with progressing cavities
  • a screen comprises a frame, allowing the screen to be mounted, for example on a hopper so as to cover the introduction opening, the frame defining a screening surface.
  • the screen simultaneously makes it possible to constitute a safety device making it possible to protect the operator from the elements placed under the screen, for example means for moving the delivery line arranged downstream of the hopper, while forming a screening device. configured to retain unsuitable aggregates by their calibration to the displacement means and / or to the desired final characteristics of the screed or concrete formed from said product.
  • the screen must also allow the product to flow into the hopper, so as to allow its subsequent movement to its place of spreading.
  • the sieving surface of the screen may comprise a metal sheet in which openings are formed, or a metal fabric formed by the interlacing of metal threads.
  • the product poured into the hopper is an assembly of materials of generally mineral nature which brings together aggregates and a binder; in particular to ensure the mechanical resistance necessary for its use, the product can also be combined with fibers of various types and shapes which modify the flow properties.
  • the screens known from the prior art tend to oppose the flow of such products in the hopper, and consequently, compromise the progression of the products to their place of spreading and the homogeneity and therefore the characteristics of the product transported.
  • the present invention therefore aims to provide a transport machine comprising a screen facilitating the flow of products, in particular the flow of products of heterogeneous structure, without compromising the safety and sieving functions of the screen and without altering the formulation. products transported.
  • this object is achieved by virtue of the characteristics described in claim 1, and in particular by virtue of a receiving hopper defining a receiving volume and an introduction opening opening into the receiving volume, the receiving hopper comprising a screen, the screen extending over the introduction opening.
  • the screen has a frame delimiting a screen surface, and at least one first screen opening formed in the screen surface to allow the flow of a product through the screen in a direction of flow, the first screen opening being bordered by first and second flow slopes spaced from one another and converging towards each other in the direction of flow.
  • the first and second flow slopes thus function in the manner of a funnel, and make it possible to promote the flow of the product along said slopes to the lower end of said slopes, towards the receiving hopper, when the screen is mounted so as to cover the introduction opening of a hopper.
  • the frame has first and second opposing sides having a first length, the first screening opening extending over all or part of the first length, preferably over more than half of the first length.
  • the frame has a first side having a longitudinal edge, and a first wing mounted on the longitudinal edge, said first wing forming the first slope of the first screen opening.
  • the arrangement on the first side of a first wing forming the first slope of the screening opening facilitates the production of the screen according to the present invention.
  • the screen further comprises at least one second screening opening bordered by first and second flow slopes spaced from one another and converging towards one another in the direction of flow, the screen comprising a first angle iron forming both the second slope of the first screening opening and the first slope of the second screening opening.
  • the presence of at least two openings allows the flow of a greater quantity of product. Further, the use of a first angle iron to form both one of the slopes of the first and second flow openings facilitates production of the screen according to the present invention.
  • the first angle has first and second wings respectively forming the second slope of the first screening opening and the first slope of the second screening opening, and a ridge connecting the first and second wings.
  • the first angle iron has an inverted V-shaped profile, considered according to the direction of flow, so that its upper part formed by the edge connecting the first and second wings does not have a flat surface which would oppose the flow of the product, unlike the screens known from the prior art and mentioned above.
  • the upper term relating to the first angle is understood according to the direction of flow of the product through the sifting surface of the screen according to the present invention.
  • the first and second wings form an angle of between 10 ° and 170 °, preferably between 60 ° and 120 °, preferably of the order of 90 °.
  • the spacing of the first and second wings of the first angle can thus be adapted as a function of the product to pass through the screen, and more particularly as a function of its components and of their dimensions and characteristics, and makes it possible to adjust the speed of 'flow of said product to the receiving hopper.
  • the screen further includes first removable attachment means configured to removably mount the first angle to the frame.
  • the dimensions of the screening openings can be modified, so as to adapt the screen to the product that it is intended to receive.
  • the adjustment of the dimensions of the screening openings makes it possible to adapt the screening function to the dimensions of the aggregates of the product.
  • the screen further includes a second angle iron having a first wing forming the second slope of the second screen opening, the first and second angle iron extending substantially parallel to each other.
  • the presence of a plurality of angles allows the formation of a plurality of screening openings in the screen, so as to further facilitate the flow of the product; in addition, the distance separating the different angles can be adapted to allow the sieving of aggregates of particular dimensions.
  • the screen has vibration means configured to cooperate with the frame of the screen so as to apply vibrations to the screen.
  • the figure 1 represents a transport machine 100, for example for transporting a fluid screed and / or for transporting concrete. It is understood that the transport machine 100 is configured to transport structural, decorative and / or insulating elements such as concrete, a fluid screed, mortar, etc.
  • the machine 100 comprises a frame 102 supporting a power supply unit; the frame 102 may also include an axle and wheels (not shown) so as to allow the machine 100 to be moved.
  • the machine 100 may have a drawbar (not shown) in order to allow the machine 100 to be towed by a vehicle.
  • the machine 100 can be directly mounted on the platform of a vehicle.
  • the machine 100 comprises a receiving hopper 106 defining a receiving volume and having an introduction opening opening into the receiving volume to introduce a product into the receiving volume of the receiving hopper 106 ;
  • the receiving hopper 106 is configured to allow the flow of said product, for example a fluid screed or concrete, towards a discharge line 108, the discharge line comprising means for moving the product in a transport duct, such as 'a spiral transmission shaft or a progressive cavity pump, so as to move the product to its place of spreading.
  • the product is an assembly of aggregates, comprising inert materials which may be of mineral nature, a binder, such as for example cement, bitumen or clay, and fibers. , which can be of various types and shapes, such as, for example, synthetic or metallic fibers.
  • the receiving hopper 106 forms a container configured to constitute a reserve of the product to be transported while allowing the flow of said product to its place of spreading via the delivery line 108.
  • the machine 100 comprises a screen 10 mounted on the receiving hopper 106, and more particularly mounted so that it extends over the opening for introducing the receiving hopper 106, or above said. introductory opening.
  • the screen 10 comprises a frame 12, for example and in a nonlimiting manner of substantially parallelepipedal shape; the frame 12 thus comprises first, second, third and fourth sides 14, 16, 18, 20 opposed in pairs, which delimit a sieving surface.
  • the screen 10 further comprises a plurality of angles 22, 22 ', 22 " which extend, for example and in a nonlimiting manner, substantially parallel to each other in a longitudinal direction L between the third and fourth sides 18 , 20 of the frame 12 ; thus, the angles 22, 22 ', 22 " extend so substantially parallel to the first and second sides 14, 16. Further, as shown in figure 4 , the height of the first, second, third and fourth sides 14, 16, 18, 20 is of the order of 1/5 times the distance between the third and fourth sides 18, 20.
  • the screen 10 comprises on the one hand a frame 12, and on the other hand a grid comprising the plurality of angles 22, 22 ', 22 ", said grid forming a plurality of flow slots, or openings of screening, which will be described in more detail in the remainder of the description, the flow slots being configured to allow the flow of a product, such as a fluid screed or concrete, through the screen 10.
  • a product such as a fluid screed or concrete
  • the angles 22, 22 ', 22 " are mounted spaced apart from each other, and also spaced from the first and second sides 14, 16, so that the screen surface of the screen 10 has a plurality of screen openings. 24, 24 ', 24 " which are configured to allow the flow, through the screen 10 in a flow direction E, of the product intended to be stored and transported by the hopper 106 of the machine 100.
  • the screen openings 24, 24 ', 24 " extend over a significant part of the length L of the first and second sides 14, 16 of the frame 12, preferably over more than half of said length, preferably over 80% of said length.
  • each of the screening openings 24, 24 ', 24 " is bordered by first 26, 26', 26" and second 28, 28 ', 28 " flow slopes which are spaced apart and converge towards each other in direction of flow E.
  • the first and second sides 14, 16 of the frame 12 each comprise a longitudinal edge 30, 32 from which extend respectively a first and a second wings 34, 36.
  • the first and second wings 34, 36 are respectively fixed to the first and second sides 14, 16 by a bolting system; one could obviously conceive of any other type of fixing.
  • the first and second wings 34, 36 each form a downward slope towards the center of the screening surface; in other words, the distal end of the wings 34, 36, which is the end of the wings opposite the proximal end by which the wings are fixed respectively to the longitudinal edges 30, 32 of the first and second sides 14, 16 , is disposed lower than said proximal end, considered along the direction of flow E.
  • angles 22, 22 ', 22 " of the screen 10 each comprise first 38, 38', 38" and second 40, 40 ', 40 " wings connected to each other by a ridge 42, 42', 42 " which can alternatively be rounded or sharp.
  • the wings of the angles 22, 22 ', 22 " each form descending slopes from the edge 42, 42', 42" ; in other words, the distal end of the wings, which is the end of the wings opposite the proximal end by which the wings are connected to each other by the ridge of the angle iron, is disposed more low that said proximal end, considered according to the direction of flow E. Stated otherwise, the angles 22, 22 ', 22 ", when they are mounted in the frame 12 of the screen 10, have an inverted V-shaped profile .
  • the first and second wings of each of the angles 22, 22 ', 22 " form between them an angle a between 10 ° and 170 °, preferably between 60 ° and 120 °, of preferably of the order of 90 °.
  • the first wing 34 extending from the first side 14 thus forms with the closest angle 22 a screening opening 24 bordered, on the one hand, by said first wing 34, and, on the other hand, by the first wing 38 of the angle iron 22, the distal ends of the first wing 34 of the first side 14 and of the first wing 38 of the adjacent angle iron 22 extending at a distance from each other, for example and without limitation parallel to each other in the longitudinal direction L.
  • the screening opening 24 thus has, considered in the direction of flow E, a V shape, the bottom of the V being open to allow flow of the product in the reception 106.
  • the two slopes of the screening opening 24 formed respectively by the first wing 34 of the first side 12 and by the first wing 38 of the angle iron 22 thus converge towards each other in the direction of flow E .
  • the second wing 36 which extends from the second side 16 of the frame 12 also forms with the nearest angle 22 " a screen opening having two flow slopes spaced apart from each other and which converge towards each other in the direction of flow E.
  • the figure 4 shows a sectional view of the screen 10 in a plane substantially vertical and parallel to the longitudinal direction L of the angles 22, 22 ', 22 ".
  • the grid further comprises first and second mounting means 44, 46.
  • Said angles 22, 22 ', 22 " are mounted on first and second mounting means 44, 46; more particularly, the first longitudinal ends 23, 23 ', 23 " of each of the angles 22, 22', 22" are fixed, for example by welding or by any other fixing means, to the first mounting means 44, while the second longitudinal ends 25, 25 ', 25 " of the angles are fixed, by welding or by any other fixing means, to the second mounting means 46. It is understood that the angles 22, 22', 22" are fixed relative to the gate.
  • the first and second mounting means 44, 46 are then attached and fixed, by fixing means 45 such as for example by a bolting system, to the third and fourth sides 18, 20 of the frame 12 of the screen 10.
  • the fixing means 45 are configured to allow removable mounting of the angles 22, 22 ', 22 " and therefore of the grid, otherwise called the filtration mesh on the frame of the screen, by means of the first and second mounting means 44 , 46. It would thus also be possible to design a kit comprising a frame 12 and a plurality of grids, the angles of said grids having different dimensions and spacings from one grid to another, to allow the user to have different grids adapted to its needs, and more particularly adapted to the characteristics of the product to be sold.
  • the angles are arranged relative to each other so as to form, between two successive angles, a screening opening. More particularly, the screening openings 24 ', 24 " thus formed between two successive angles have two flow slopes which are formed respectively by the second flange 36 of a first angle 22 and by the first flange 38' of a second angle bar 22 ' adjacent to the first angle bar 22.
  • the edge of the angles 22, 22 ', 22 " does not form a flat surface which could slow down or even oppose the flow of the product through the sieving surface.
  • the arrangement of the angles in the frame 12 allows the screen 10 to ensure the protection of the user, by protecting him from the elements arranged in the bottom of the receiving hopper 106, and to ensure the screening function.
  • the aggregates the dimensions of which are greater than the space between two successive angles or the space between the end angles of the wings extending from the first and second sides, being blocked by the screen 10 ; such aggregates would risk damaging the elements ensuring the transport of the product downstream of the receiving hopper 106.
  • the screen 10 according to the present invention is therefore configured so that such aggregates do not pass through the screening surface.
  • said screen 10 further comprises vibration means 60, comprising for example and in a nonlimiting manner an electric or pneumatic vibrator, which are configured to cooperate with the frame 12 so as to apply vibrations to the screen 10.
  • vibration means 60 comprising for example and in a nonlimiting manner an electric or pneumatic vibrator, which are configured to cooperate with the frame 12 so as to apply vibrations to the screen 10.
  • the effects of actuating the vibrating means 60 on the flow of the product are particularly significant because of the large surfaces formed by the wings of the various elements of the screen 10.
  • the surface formed by the wings of the various elements of the screen according to the present invention is greater than that formed by an interlacing of metallic threads.
  • angles 22, 22 ', 22 "as well as the various elements constituting the frame 12 are formed by mechanical welding; the angles can thus be formed by the assembly of two connected flat parts, by for example by welding, one to the other at the level of the edge while being inclined with respect to each other. Alternatively, they can be formed from a flat sheet folded so as to form two slopes distinct.
  • angles have identical structures and dimensions. It would obviously be possible to design, without departing from the scope of the present invention, on the one hand angles whose two wings have different dimensions and / or shapes, and on the other hand a screen 12 comprising angles of different dimensions, or even angles arranged so that the screening openings have different shapes and dimensions.

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  • Engineering & Computer Science (AREA)
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  • Structural Engineering (AREA)
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Description

DOMAINE DE L'INVENTIONFIELD OF THE INVENTION

La présente invention se rapporte au domaine des cribles configurés pour équiper, par exemple et de manière non limitative, une trémie. Elle concerne en particulier un crible monté sur une trémie équipant une machine de transport de chape fluide et/ou de béton.The present invention relates to the field of screens configured to equip, for example and without limitation, a hopper. It relates in particular to a screen mounted on a hopper equipping a fluid screed and / or concrete transport machine.

ETAT DE LA TECHNIQUE ANTERIEURESTATE OF THE PRIOR ART

De façon connue, une trémie définit un volume de réception permettant de recevoir, de contenir et de transporter un produit, la trémie ayant une ouverture d'introduction débouchant dans le volume de réception ; la trémie est également configurée pour assurer un écoulement dudit produit vers une ligne de refoulement, la ligne de refoulement comportant des moyens de déplacement du produit dans une gaine de transport, tels qu'un arbre de transmission à spires ou une pompe à cavités progressantes, de manière à déplacer le produit jusqu'à son lieu d'épandage. Les documents US347870 , DE102014005192, EP2716372 et EP1782934 décrivent des trémies de réception de l'état de la technique.In known manner, a hopper defines a receiving volume making it possible to receive, contain and transport a product, the hopper having an introduction opening opening into the receiving volume; the hopper is also configured to ensure a flow of said product towards a delivery line, the delivery line comprising means for moving the product in a transport sheath, such as a transmission shaft with turns or a pump with progressing cavities, so as to move the product to its place of spreading. The documents US347870 , DE102014005192, EP2716372 and EP1782934 describe state of the art receiving hoppers.

Par ailleurs, également de façon connue, un crible comporte un cadre, permettant le montage du crible par exemple sur une trémie de manière à en couvrir l'ouverture d'introduction, le cadre définissant une surface de tamisage. Le crible permet à la fois de constituer un dispositif de sécurité permettant de protéger l'opérateur des éléments disposés sous le crible, par exemple des moyens de déplacement de la ligne de refoulement disposée en aval de la trémie, tout en formant un dispositif de tamisage configuré pour retenir les agrégats impropres par leur calibration aux moyens de déplacement et/ou aux caractéristiques finales recherchées de la chape ou du béton formés à partir dudit produit. Par ailleurs, le crible doit également permettre d'écouler le produit dans la trémie, de manière à permettre son déplacement ultérieur jusqu'à son lieu d'épandage.Furthermore, also in a known manner, a screen comprises a frame, allowing the screen to be mounted, for example on a hopper so as to cover the introduction opening, the frame defining a screening surface. The screen simultaneously makes it possible to constitute a safety device making it possible to protect the operator from the elements placed under the screen, for example means for moving the delivery line arranged downstream of the hopper, while forming a screening device. configured to retain unsuitable aggregates by their calibration to the displacement means and / or to the desired final characteristics of the screed or concrete formed from said product. Furthermore, the screen must also allow the product to flow into the hopper, so as to allow its subsequent movement to its place of spreading.

De manière connue, la surface de tamisage du crible peut comporter une tôle métallique dans laquelle des ouvertures sont formées, ou un tissu métallique formé par l'entrelacement de fils métalliques.In known manner, the sieving surface of the screen may comprise a metal sheet in which openings are formed, or a metal fabric formed by the interlacing of metal threads.

Le produit déversé dans la trémie est un assemblage de matériaux de nature généralement minérale qui met en présence des agrégats et un liant ; en particulier pour assurer une résistance mécanique nécessaire à son utilisation, le produit peut également être associé à des fibres de nature et de forme variées qui modifient les propriétés d'écoulement. Or, du fait de la présence de surfaces planes formées par la tôle métallique ou du fait de l'entrelacement des fils de tissu métallique, les cribles connus de l'art antérieur tendent à s'opposer à l'écoulement de tels produits dans la trémie, et par suite, compromettent la progression des produits jusqu'à leur lieu d'épandage et l'homogénéité et donc les caractéristiques du produit transporté.The product poured into the hopper is an assembly of materials of generally mineral nature which brings together aggregates and a binder; in particular to ensure the mechanical resistance necessary for its use, the product can also be combined with fibers of various types and shapes which modify the flow properties. However, due to the presence of flat surfaces formed by the metal sheet or due to the interlacing of the wires of metallic fabric, the screens known from the prior art tend to oppose the flow of such products in the hopper, and consequently, compromise the progression of the products to their place of spreading and the homogeneity and therefore the characteristics of the product transported.

PRESENTATION DE L'INVENTIONPRESENTATION OF THE INVENTION

La présente invention a donc pour but de proposer une machine de transport comprenant un crible facilitant l'écoulement des produits, en particulier l'écoulement de produits de structure hétérogène, sans compromettre les fonctions de sécurité et de tamisage du crible et sans altérer la formulation des produits transportés.The present invention therefore aims to provide a transport machine comprising a screen facilitating the flow of products, in particular the flow of products of heterogeneous structure, without compromising the safety and sieving functions of the screen and without altering the formulation. products transported.

Conformément à l'invention, ce but est atteint grâce aux caractéristiques décrites en revendication 1, et notamment grâce à une trémie de réception définissant un volume de réception et une ouverture d'introduction débouchant dans le volume de réception, la trémie de réception comportant un crible, le crible s'étendant sur l'ouverture d'introduction. Le crible comporte un cadre délimitant une surface de tamisage, et au moins une première ouverture de tamisage formée dans la surface de tamisage pour permettre l'écoulement d'un produit au travers du crible selon une direction d'écoulement, la première ouverture de tamisage étant bordée par des première et deuxième pentes d'écoulement espacées l'une de l'autre et convergeant l'une vers l'autre selon la direction d'écoulement.According to the invention, this object is achieved by virtue of the characteristics described in claim 1, and in particular by virtue of a receiving hopper defining a receiving volume and an introduction opening opening into the receiving volume, the receiving hopper comprising a screen, the screen extending over the introduction opening. The screen has a frame delimiting a screen surface, and at least one first screen opening formed in the screen surface to allow the flow of a product through the screen in a direction of flow, the first screen opening being bordered by first and second flow slopes spaced from one another and converging towards each other in the direction of flow.

Les première et deuxième pentes d'écoulement fonctionnent ainsi à la manière d'un entonnoir, et permettent de favoriser l'écoulement du produit le long desdites pentes jusqu'à l'extrémité inférieure desdites pentes, vers la trémie de réception, lorsque le crible est monté de manière à couvrir l'ouverture d'introduction d'une trémie.The first and second flow slopes thus function in the manner of a funnel, and make it possible to promote the flow of the product along said slopes to the lower end of said slopes, towards the receiving hopper, when the screen is mounted so as to cover the introduction opening of a hopper.

L'invention est déclinée ci-après dans une série de variantes de réalisation, qui peuvent être considérées seules ou en combinaison avec une ou plusieurs des précédentes.The invention is set out below in a series of variant embodiments, which can be considered alone or in combination with one or more of the preceding ones.

Dans certains modes de réalisation, le cadre comporte des premier et deuxième côtés opposés présentant une première longueur, la première ouverture de tamisage s'étendant sur tout ou partie de la première longueur, de préférence sur plus de la moitié de la première longueur.In some embodiments, the frame has first and second opposing sides having a first length, the first screening opening extending over all or part of the first length, preferably over more than half of the first length.

Par cette disposition, une quantité significative du produit peut s'écouler au travers de la première ouverture de tamisage.By this arrangement, a significant amount of the product can flow through the first screening opening.

Dans certains modes de réalisation, le cadre comporte un premier côté ayant une bordure longitudinale, et une première aile montée sur la bordure longitudinale, ladite première aile formant la première pente de la première ouverture de tamisage.In some embodiments, the frame has a first side having a longitudinal edge, and a first wing mounted on the longitudinal edge, said first wing forming the first slope of the first screen opening.

L'agencement sur le premier côté d'une première aile formant la première pente de l'ouverture de tamisage permet de faciliter la production du crible selon la présente invention.The arrangement on the first side of a first wing forming the first slope of the screening opening facilitates the production of the screen according to the present invention.

Dans certains modes de réalisation, le crible comporte en outre au moins une deuxième ouverture de tamisage bordée par des première et deuxième pentes d'écoulement espacées l'une de l'autre et convergeant l'une vers l'autre selon la direction d'écoulement, le crible comportant une première cornière formant à la fois la deuxième pente de la première ouverture de tamisage et la première pente de la deuxième ouverture de tamisage.In certain embodiments, the screen further comprises at least one second screening opening bordered by first and second flow slopes spaced from one another and converging towards one another in the direction of flow, the screen comprising a first angle iron forming both the second slope of the first screening opening and the first slope of the second screening opening.

La présence d'au moins deux ouvertures permet l'écoulement d'une plus grande quantité de produit. En outre, l'utilisation d'une première cornière pour former à la fois l'une des pentes des première et deuxième ouvertures d'écoulement facilite la production du crible selon la présente invention.The presence of at least two openings allows the flow of a greater quantity of product. Further, the use of a first angle iron to form both one of the slopes of the first and second flow openings facilitates production of the screen according to the present invention.

De préférence, la première cornière présente des première et deuxième ailes formant respectivement la deuxième pente de la première ouverture de tamisage et la première pente de la deuxième ouverture de tamisage, et une arête reliant les première et deuxième ailes.Preferably, the first angle has first and second wings respectively forming the second slope of the first screening opening and the first slope of the second screening opening, and a ridge connecting the first and second wings.

En d'autres termes, la première cornière présente un profil en forme de V inversé, considérée selon la direction d'écoulement, de manière que sa partie supérieure constituée par l'arête reliant les première et deuxième ailes ne présente pas de surface plane qui s'opposerait à l'écoulement du produit, à l'inverse des cribles connus de l'art antérieur et évoqués précédemment.In other words, the first angle iron has an inverted V-shaped profile, considered according to the direction of flow, so that its upper part formed by the edge connecting the first and second wings does not have a flat surface which would oppose the flow of the product, unlike the screens known from the prior art and mentioned above.

Le terme supérieur relatif à la première cornière s'entend selon la direction d'écoulement du produit au travers de la surface de tamisage du crible selon la présente invention.The upper term relating to the first angle is understood according to the direction of flow of the product through the sifting surface of the screen according to the present invention.

Dans certains modes de réalisation, considérées selon la direction d'écoulement, les première et deuxième ailes forment un angle compris entre 10° et 170°, de préférence compris entre 60° et 120°, de préférence de l'ordre de 90°.In certain embodiments, considered according to the direction of flow, the first and second wings form an angle of between 10 ° and 170 °, preferably between 60 ° and 120 °, preferably of the order of 90 °.

L'écartement des première et deuxième ailes de la première cornière peut ainsi être adapté en fonction du produit devant passer au travers du crible, et plus particulièrement en fonction de ses composants et de leurs dimensions et caractéristiques, et permet d'ajuster la vitesse d'écoulement dudit produit vers la trémie de réception.The spacing of the first and second wings of the first angle can thus be adapted as a function of the product to pass through the screen, and more particularly as a function of its components and of their dimensions and characteristics, and makes it possible to adjust the speed of 'flow of said product to the receiving hopper.

Dans certains modes de réalisation, le crible comporte en outre des premiers moyens de fixation amovible configurés pour monter la première cornière de manière amovible sur le cadre.In some embodiments, the screen further includes first removable attachment means configured to removably mount the first angle to the frame.

Par cette disposition, les dimensions des ouvertures de tamisage peuvent être modifiées, de manière à adapter le crible au produit qu'il est destiné à recevoir. En particulier, l'ajustement des dimensions des ouvertures de tamisage permet d'adapter la fonction de tamisage aux dimensions des agrégats du produit.By this arrangement, the dimensions of the screening openings can be modified, so as to adapt the screen to the product that it is intended to receive. In particular, the adjustment of the dimensions of the screening openings makes it possible to adapt the screening function to the dimensions of the aggregates of the product.

Dans certains modes de réalisation, le crible comporte en outre une deuxième cornière ayant une première aile formant la deuxième pente de la deuxième ouverture de tamisage, les première et deuxième cornières s'étendant de manière sensiblement parallèle l'une à l'autre.In some embodiments, the screen further includes a second angle iron having a first wing forming the second slope of the second screen opening, the first and second angle iron extending substantially parallel to each other.

La présence d'une pluralité de cornières permet la formation d'une pluralité d'ouvertures de tamisage dans le crible, de manière à encore faciliter l'écoulement du produit ; en outre, la distance séparant les différentes cornières peut être adaptée pour permettre le tamisage d'agrégats de dimensions particulières.The presence of a plurality of angles allows the formation of a plurality of screening openings in the screen, so as to further facilitate the flow of the product; in addition, the distance separating the different angles can be adapted to allow the sieving of aggregates of particular dimensions.

Dans certains modes de réalisation, le crible comporte des moyens de vibration configurés pour coopérer avec le cadre du crible de manière à appliquer des vibrations au crible.In some embodiments, the screen has vibration means configured to cooperate with the frame of the screen so as to apply vibrations to the screen.

L'application de vibrations sur le crible par l'intermédiaire de son cadre contribue à l'efficacité de l'écoulement du produit au travers de la surface de tamisage.Applying vibration to the screen through its frame contributes to efficient product flow through the screen surface.

BREVE DESCRIPTION DES DESSINSBRIEF DESCRIPTION OF THE DRAWINGS

L'invention et ses avantages seront mieux compris à la lecture de la description détaillée faite ci-après d'un mode de réalisation de l'invention donné à titre d'exemple non limitatif. Cette description fait référence aux pages de figures annexées, sur lesquelles :

  • la figure 1 représente une machine de transport de chape fluide et/ou de béton comportant une trémie de réception équipée d'un crible selon la présente invention ;
  • la figure 2 représente une vue en perspective d'un exemple de crible selon la présente invention ;
  • la figure 3 représente une vue de dessus d'un exemple de crible selon la présente invention ; et
  • les figures 4 et 5 représentent schématiquement des vues en coupe selon des plans transversaux l'un à l'autre d'un exemple de crible selon la présente invention.
The invention and its advantages will be better understood on reading the detailed description given below of an embodiment of the invention given by way of non-limiting example. This description refers to the pages of appended figures, on which:
  • the figure 1 shows a fluid screed and / or concrete transport machine comprising a receiving hopper equipped with a screen according to the present invention;
  • the figure 2 shows a perspective view of an example of a screen according to the present invention;
  • the figure 3 shows a top view of an example of a screen according to the present invention; and
  • the figures 4 and 5 schematically show sectional views along planes transverse to each other of an example of a screen according to the present invention.

DESCRIPTION DETAILLEE D'EXEMPLES DE REALISATIONDETAILED DESCRIPTION OF EXAMPLES OF IMPLEMENTATION

La figure 1 représente une machine de transport 100, par exemple pour le transport d'une chape fluide et/ou pour le transport de béton. On comprend que la machine de transport 100 est configurée pour transporter des éléments structurants, décoratifs et/ou isolants tels que du béton, une chape fluide, du mortier, etc. De manière usuelle, la machine 100 comporte un châssis 102 supportant un bloc d'alimentation ; le châssis 102 peut également comporter un essieu et des roues (non représentés) de manière à permettre de déplacer la machine 100. En outre, la machine 100 peut comporter un timon (non représenté) afin de permettre à la machine 100 d'être tractée par un véhicule. Alternativement, la machine 100 peut directement être montée sur le plateau d'un véhicule.The figure 1 represents a transport machine 100, for example for transporting a fluid screed and / or for transporting concrete. It is understood that the transport machine 100 is configured to transport structural, decorative and / or insulating elements such as concrete, a fluid screed, mortar, etc. Usually, the machine 100 comprises a frame 102 supporting a power supply unit; the frame 102 may also include an axle and wheels (not shown) so as to allow the machine 100 to be moved. In addition, the machine 100 may have a drawbar (not shown) in order to allow the machine 100 to be towed by a vehicle. Alternatively, the machine 100 can be directly mounted on the platform of a vehicle.

En outre, la machine 100 comporte une trémie de réception 106 définissant un volume de réception et ayant une ouverture d'introduction débouchant dans le volume de réception pour introduire un produit dans le volume de réception de la trémie de réception 106 ; la trémie de réception 106 est configurée pour permettre l'écoulement dudit produit, par exemple une chape fluide ou du béton, vers une ligne de refoulement 108, la ligne de refoulement comportant des moyens de déplacement du produit dans une gaine de transport, tels qu'un arbre de transmission à spires ou une pompe à cavités progressantes, de manière à déplacer le produit jusqu'à son lieu d'épandage.In addition, the machine 100 comprises a receiving hopper 106 defining a receiving volume and having an introduction opening opening into the receiving volume to introduce a product into the receiving volume of the receiving hopper 106 ; the receiving hopper 106 is configured to allow the flow of said product, for example a fluid screed or concrete, towards a discharge line 108, the discharge line comprising means for moving the product in a transport duct, such as 'a spiral transmission shaft or a progressive cavity pump, so as to move the product to its place of spreading.

Par exemple et de manière non limitative, le produit est un assemblage d'agrégats, comprenant des matières inerte pouvant être de nature minérale, d'un liant, tel que par exemple du ciment, du bitume ou de l'argile, et des fibres, pouvant être de nature et de formes variées, telles que par exemple des fibres synthétiques ou métalliques.For example and in a nonlimiting manner, the product is an assembly of aggregates, comprising inert materials which may be of mineral nature, a binder, such as for example cement, bitumen or clay, and fibers. , which can be of various types and shapes, such as, for example, synthetic or metallic fibers.

Ainsi, la trémie de réception 106 forme un contenant configuré pour constituer une réserve du produit à transporter tout en permettant l'écoulement dudit produit vers son lieu d'épandage par la ligne de refoulement 108. Thus, the receiving hopper 106 forms a container configured to constitute a reserve of the product to be transported while allowing the flow of said product to its place of spreading via the delivery line 108.

Par ailleurs, la machine 100 comporte un crible 10 monté sur la trémie de réception 106, et plus particulièrement monté de manière qu'il s'étende sur l'ouverture d'introduction de la trémie de réception 106, ou au-dessus de ladite ouverture d'introduction.Furthermore, the machine 100 comprises a screen 10 mounted on the receiving hopper 106, and more particularly mounted so that it extends over the opening for introducing the receiving hopper 106, or above said. introductory opening.

Tel que représenté sur les figures 2 à 5 , le crible 10 selon la présente invention comporte un cadre 12, par exemple et de manière non limitative de forme sensiblement parallélépipédique ; le cadre 12 comporte ainsi des premier, deuxième, troisième et quatrième côtés 14, 16, 18, 20 opposés deux à deux, qui délimitent une surface de tamisage.As shown on figures 2 to 5 , the screen 10 according to the present invention comprises a frame 12, for example and in a nonlimiting manner of substantially parallelepipedal shape; the frame 12 thus comprises first, second, third and fourth sides 14, 16, 18, 20 opposed in pairs, which delimit a sieving surface.

Le crible 10 comporte en outre une pluralité de cornières 22, 22', 22" qui s'étendent, par exemple et de manière non limitative, de manière sensiblement parallèle les unes aux autres selon une direction longitudinale L entre les troisième et quatrième côtés 18, 20 du cadre 12 ; ainsi, les cornières 22, 22', 22" s'étendent de manière sensiblement parallèle aux premier et deuxième côtés 14, 16. En outre, comme représenté sur la figure 4 , la hauteur des premier, deuxième, troisième et quatrième côtés 14, 16, 18, 20 est de l'ordre de 1/5 fois la distance entre les troisième et quatrième côtés 18, 20. The screen 10 further comprises a plurality of angles 22, 22 ', 22 " which extend, for example and in a nonlimiting manner, substantially parallel to each other in a longitudinal direction L between the third and fourth sides 18 , 20 of the frame 12 ; thus, the angles 22, 22 ', 22 " extend so substantially parallel to the first and second sides 14, 16. Further, as shown in figure 4 , the height of the first, second, third and fourth sides 14, 16, 18, 20 is of the order of 1/5 times the distance between the third and fourth sides 18, 20.

On comprend donc que le crible 10 comprend d'une part un cadre 12, et d'autre part une grille comprenant la pluralité de cornières 22, 22', 22", ladite grille formant une pluralité de fentes d'écoulement, ou ouvertures de tamisage, qui seront décrites plus en détails dans la suite de la description, les fentes d'écoulement étant configurées pour permettre l'écoulement d'un produit, tel qu'une chape fluide ou un béton, au travers du crible 10. It is therefore understood that the screen 10 comprises on the one hand a frame 12, and on the other hand a grid comprising the plurality of angles 22, 22 ', 22 ", said grid forming a plurality of flow slots, or openings of screening, which will be described in more detail in the remainder of the description, the flow slots being configured to allow the flow of a product, such as a fluid screed or concrete, through the screen 10.

Les cornières 22, 22', 22" sont montées de manière espacée les unes des autres, et également à distance des premier et deuxième côtés 14, 16, de manière que la surface de tamisage du crible 10 comporte une pluralité d'ouvertures de tamisage 24, 24', 24" qui sont configurées pour permettre l'écoulement, au travers du crible 10 selon une direction d'écoulement E, du produit destiné à être stocké et transporté par la trémie 106 de la machine 100. The angles 22, 22 ', 22 " are mounted spaced apart from each other, and also spaced from the first and second sides 14, 16, so that the screen surface of the screen 10 has a plurality of screen openings. 24, 24 ', 24 " which are configured to allow the flow, through the screen 10 in a flow direction E, of the product intended to be stored and transported by the hopper 106 of the machine 100.

Par exemple et de manière non limitative, les ouvertures de tamisage 24, 24', 24" s'étendent sur une partie significative de la longueur L des premier et deuxième côtés 14, 16 du cadre 12, de préférence sur plus de la moitié de ladite longueur, de préférence sur plus de 80 % de ladite longueur.For example and without limitation, the screen openings 24, 24 ', 24 " extend over a significant part of the length L of the first and second sides 14, 16 of the frame 12, preferably over more than half of said length, preferably over 80% of said length.

Tel que cela apparaît en particulier sur la figure 5 qui représente une vue en coupe du crible 10 dans un plan sensiblement vertical et perpendiculaire à la direction longitudinale L, chacune des ouvertures de tamisage 24, 24', 24" est bordée par des première 26, 26', 26" et deuxième 28, 28', 28" pentes d'écoulement qui sont espacées l'une de l'autre et qui convergent l'une vers l'autre selon la direction d'écoulement E. As it appears in particular on the figure 5 which shows a sectional view of the screen 10 in a substantially vertical plane and perpendicular to the longitudinal direction L, each of the screening openings 24, 24 ', 24 " is bordered by first 26, 26', 26" and second 28, 28 ', 28 " flow slopes which are spaced apart and converge towards each other in direction of flow E.

Les premier et deuxième côtés 14, 16 du cadre 12 comportent chacun une bordure longitudinale 30, 32 à partir de laquelle s'étendent respectivement une première et une deuxième ailes 34, 36. Par exemple et de manière non limitative, les première et deuxième ailes 34, 36 sont fixées respectivement aux premier et deuxième côtés 14, 16 par un système de boulonnage ; on pourrait bien évidemment concevoir tout autre type de fixation.The first and second sides 14, 16 of the frame 12 each comprise a longitudinal edge 30, 32 from which extend respectively a first and a second wings 34, 36. For example and without limitation, the first and second wings 34, 36 are respectively fixed to the first and second sides 14, 16 by a bolting system; one could obviously conceive of any other type of fixing.

Les première et deuxième ailes 34, 36 forment chacune une pente descendante vers le centre de la surface de tamisage ; en d'autres termes, l'extrémité distale des ailes 34, 36, qui est l'extrémité des ailes opposée à l'extrémité proximale par laquelle les ailes sont fixées respectivement aux bordures longitudinales 30, 32 des premier et deuxième côtés 14, 16, est disposée plus bas que ladite extrémité proximale, considérée selon la direction d'écoulement E. The first and second wings 34, 36 each form a downward slope towards the center of the screening surface; in other words, the distal end of the wings 34, 36, which is the end of the wings opposite the proximal end by which the wings are fixed respectively to the longitudinal edges 30, 32 of the first and second sides 14, 16 , is disposed lower than said proximal end, considered along the direction of flow E.

Par ailleurs, tel que représenté en particulier sur la figure 5 , les cornières 22, 22', 22" du crible 10 comportent chacune des première 38, 38', 38" et deuxième 40, 40', 40" ailes reliées l'une à l'autre par une arête 42, 42', 42" qui peut alternativement être arrondie ou vive.Moreover, as shown in particular on the figure 5 , the angles 22, 22 ', 22 " of the screen 10 each comprise first 38, 38', 38" and second 40, 40 ', 40 " wings connected to each other by a ridge 42, 42', 42 " which can alternatively be rounded or sharp.

Les ailes des cornières 22, 22', 22" forment chacune des pentes descendantes à partir de l'arête 42, 42', 42" ; en d'autres termes, l'extrémité distale des ailes, qui est l'extrémité des ailes opposée à l'extrémité proximale par laquelle les ailes sont reliées l'une à l'autre par l'arête de la cornière, est disposée plus bas que ladite extrémité proximale, considérée selon la direction d'écoulement E. Dit encore autrement, les cornières 22, 22', 22", lorsqu'elles sont montées dans le cadre 12 du crible 10, présentent un profil en forme de V inversé.The wings of the angles 22, 22 ', 22 " each form descending slopes from the edge 42, 42', 42" ; in other words, the distal end of the wings, which is the end of the wings opposite the proximal end by which the wings are connected to each other by the ridge of the angle iron, is disposed more low that said proximal end, considered according to the direction of flow E. Stated otherwise, the angles 22, 22 ', 22 ", when they are mounted in the frame 12 of the screen 10, have an inverted V-shaped profile .

Considérées selon la direction d'écoulement E, les première et deuxième ailes de chacune des cornières 22, 22', 22" forment entre elles un angle a compris entre 10° et 170°, de préférence compris entre 60° et 120°, de préférence de l'ordre de 90°.Considered according to the direction of flow E, the first and second wings of each of the angles 22, 22 ', 22 " form between them an angle a between 10 ° and 170 °, preferably between 60 ° and 120 °, of preferably of the order of 90 °.

La première aile 34 s'étendant à partir du premier côté 14 forme ainsi avec la cornière 22 la plus proche une ouverture de tamisage 24 bordée, d'une part, par ladite première aile 34, et, d'autre part, par la première aile 38 de la cornière 22, les extrémités distales de la première aile 34 du premier côté 14 et de la première aile 38 de la cornière 22 adjacente s'étendant à distance l'une de l'autre, par exemple et de manière non limitative de manière parallèle l'une à l'autre selon la direction longitudinale L. L'ouverture de tamisage 24 présente ainsi, considérée selon la direction d'écoulement E, une forme de V, le fond du V étant ouvert pour permettre l'écoulement du produit dans la trémie de réception 106. Les deux pentes de l'ouverture de tamisage 24 formées respectivement par la première aile 34 du premier côté 12 et par la première aile 38 de la cornière 22 convergent ainsi l'une vers l'autre selon la direction d'écoulement E. The first wing 34 extending from the first side 14 thus forms with the closest angle 22 a screening opening 24 bordered, on the one hand, by said first wing 34, and, on the other hand, by the first wing 38 of the angle iron 22, the distal ends of the first wing 34 of the first side 14 and of the first wing 38 of the adjacent angle iron 22 extending at a distance from each other, for example and without limitation parallel to each other in the longitudinal direction L. The screening opening 24 thus has, considered in the direction of flow E, a V shape, the bottom of the V being open to allow flow of the product in the reception 106. The two slopes of the screening opening 24 formed respectively by the first wing 34 of the first side 12 and by the first wing 38 of the angle iron 22 thus converge towards each other in the direction of flow E .

De manière similaire, la deuxième aile 36 qui s'étend à partir du deuxième côté 16 du cadre 12 forme également avec la cornière 22" la plus proche une ouverture de tamisage présentant deux pentes d'écoulement espacées l'une de l'autre et qui convergent l'une vers l'autre selon la direction d'écoulement E. Similarly, the second wing 36 which extends from the second side 16 of the frame 12 also forms with the nearest angle 22 " a screen opening having two flow slopes spaced apart from each other and which converge towards each other in the direction of flow E.

La figure 4 représente une vue en coupe du crible 10 dans un plan sensiblement vertical et parallèle à la direction longitudinale L des cornières 22, 22', 22". La grille comprend en outre des premier et second moyens de montage 44, 46. Lesdites cornières 22, 22', 22" sont montées sur des premier et second moyens de montage 44, 46 ; plus particulièrement, les premières extrémités longitudinales 23, 23', 23" de chacune des cornières 22, 22', 22" sont fixées, par exemple par soudure ou par tout autre moyen de fixation, au premier moyen de montage 44, alors que les secondes extrémités longitudinales 25, 25', 25" des cornières sont fixées, par soudure ou par tout autre moyen de fixation, au second moyen de montage 46. On comprend que les cornières 22, 22', 22" sont fixes par rapport à la grille.The figure 4 shows a sectional view of the screen 10 in a plane substantially vertical and parallel to the longitudinal direction L of the angles 22, 22 ', 22 ". The grid further comprises first and second mounting means 44, 46. Said angles 22, 22 ', 22 " are mounted on first and second mounting means 44, 46; more particularly, the first longitudinal ends 23, 23 ', 23 " of each of the angles 22, 22', 22" are fixed, for example by welding or by any other fixing means, to the first mounting means 44, while the second longitudinal ends 25, 25 ', 25 " of the angles are fixed, by welding or by any other fixing means, to the second mounting means 46. It is understood that the angles 22, 22', 22" are fixed relative to the gate.

Les premier et second moyens de montage 44, 46 sont ensuite rapportés et fixés, par des moyens de fixation 45 tels que par exemple par un système de boulonnage, aux troisième et quatrième côtés 18, 20 du cadre 12 du crible 10. The first and second mounting means 44, 46 are then attached and fixed, by fixing means 45 such as for example by a bolting system, to the third and fourth sides 18, 20 of the frame 12 of the screen 10.

Les moyens de fixation 45 sont configurés pour permettre un montage amovible des cornières 22, 22', 22" et donc de la grille, autrement appelée treillis de filtration sur le cadre du crible, par l'intermédiaire des premier et second moyens de montage 44, 46. On pourrait ainsi également concevoir un kit comprenant un cadre 12 et une pluralité de grilles, les cornières desdites grilles présentant des dimensions et des espacements différents d'une grille à l'autre, pour permettre à l'utilisateur de disposer de différentes grilles adaptées à ses besoins, et plus particulièrement adaptées aux caractéristiques du produit à écouler.The fixing means 45 are configured to allow removable mounting of the angles 22, 22 ', 22 " and therefore of the grid, otherwise called the filtration mesh on the frame of the screen, by means of the first and second mounting means 44 , 46. It would thus also be possible to design a kit comprising a frame 12 and a plurality of grids, the angles of said grids having different dimensions and spacings from one grid to another, to allow the user to have different grids adapted to its needs, and more particularly adapted to the characteristics of the product to be sold.

Tel que représenté en particulier sur la figure 5 , les cornières sont disposées les unes par rapport aux autres de manière à former, entre deux cornières successives, une ouverture de tamisage. Plus particulièrement, les ouvertures de tamisage 24', 24" ainsi formées entre deux cornières successives présentent deux pentes d'écoulement qui sont formées respectivement par la deuxième aile 36 d'une première cornière 22 et par la première aile 38' d'une deuxième cornière 22' adjacente à la première cornière 22. As shown in particular on the figure 5 , the angles are arranged relative to each other so as to form, between two successive angles, a screening opening. More particularly, the screening openings 24 ', 24 " thus formed between two successive angles have two flow slopes which are formed respectively by the second flange 36 of a first angle 22 and by the first flange 38' of a second angle bar 22 ' adjacent to the first angle bar 22.

Le montage des cornières 22, 22', 22" dans le cadre 12 du crible 10 et la présence des ailes 34, 36 s'étendant à partir des premier et deuxième côtés 14, 16 du cadre 12 permettent la formation d'ouvertures de tamisage 24, 24', 24" présentant des pentes convergentes, dans la direction d'écoulement E du produit déversé sur le crible 10, la forme desdites ouvertures de tamisage favorisant l'écoulement dudit produit au travers de la surface de tamisage du crible 10. Dit autrement, la présence des ouvertures de tamisage présentant une forme de V, le fond du V étant ouvert, contribue à la fonction d'entonnoir du crible 10. The mounting of the angles 22, 22 ', 22 " in the frame 12 of the screen 10 and the presence of the wings 34, 36 extending from the first and second sides 14, 16 of the frame 12 allow the formation of screen openings. 24, 24 ', 24 " having converging slopes, in the direction of flow E of the product discharged onto the screen 10, the shape of said screen openings promoting the flow of said product through the screening surface of the screen 10. In other words, the presence of the sieve openings having a V-shape, the bottom of the V being open, contributes to the funnel function of the sieve 10.

L'arête des cornières 22, 22', 22" ne forme pas une surface plane qui pourrait ralentir, voire s'opposer à l'écoulement du produit au travers de la surface de tamisage.The edge of the angles 22, 22 ', 22 " does not form a flat surface which could slow down or even oppose the flow of the product through the sieving surface.

Par ailleurs, l'agencement des cornières dans le cadre 12 permet au crible 10 d'assurer la protection de l'utilisateur, en le protégeant des éléments disposés dans le fond de la trémie de réception 106, et d'assurer la fonction de criblage, les agrégats, dont les dimensions sont supérieures à l'espace séparant deux cornières successives ou à l'espace séparant les cornières d'extrémités des ailes s'étendant à partir des premier et deuxième côtés, étant bloqués par le crible 10 ; de tels agrégats risqueraient d'endommager les éléments assurant le transport du produit en aval de la trémie de réception 106. Le crible 10 selon la présente invention est donc configuré pour que de tels agrégats ne traversent pas la surface de criblage.Furthermore, the arrangement of the angles in the frame 12 allows the screen 10 to ensure the protection of the user, by protecting him from the elements arranged in the bottom of the receiving hopper 106, and to ensure the screening function. , the aggregates, the dimensions of which are greater than the space between two successive angles or the space between the end angles of the wings extending from the first and second sides, being blocked by the screen 10 ; such aggregates would risk damaging the elements ensuring the transport of the product downstream of the receiving hopper 106. The screen 10 according to the present invention is therefore configured so that such aggregates do not pass through the screening surface.

De manière à encore améliorer l'écoulement du produit au travers du crible 10, ledit crible 10 comporte en outre des moyens de vibration 60, comportant par exemple et de manière non limitative un vibrateur électrique ou pneumatique, qui sont configurés pour coopérer avec le cadre 12 de manière à appliquer des vibrations au crible 10. En outre, les effets de l'actionnement des moyens de vibration 60 sur l'écoulement du produit sont particulièrement significatifs du fait des surfaces importantes constituées par les ailes des différents éléments du crible 10. En particulier, la surface constituée par les ailes des différents éléments du crible selon la présente invention est supérieure à celle formée par un entrelacement de fils métalliques.So as to further improve the flow of the product through the screen 10, said screen 10 further comprises vibration means 60, comprising for example and in a nonlimiting manner an electric or pneumatic vibrator, which are configured to cooperate with the frame 12 so as to apply vibrations to the screen 10. Further, the effects of actuating the vibrating means 60 on the flow of the product are particularly significant because of the large surfaces formed by the wings of the various elements of the screen 10. In particular, the surface formed by the wings of the various elements of the screen according to the present invention is greater than that formed by an interlacing of metallic threads.

Par exemple et de manière non limitative, les cornières 22, 22', 22" ainsi que les différents éléments constituant le cadre 12 sont formés par mécano-soudure ; les cornières peuvent ainsi être formées par l'assemblage de deux pièces planes reliées, par exemple par soudure, l'une à l'autre au niveau de l'arête en étant inclinées l'une par rapport à l'autre. Alternativement, elles peuvent être formées à partir d'une tôle plane pliée de manière à former deux pentes distinctes.For example and in a nonlimiting manner, the angles 22, 22 ', 22 "as well as the various elements constituting the frame 12 are formed by mechanical welding; the angles can thus be formed by the assembly of two connected flat parts, by for example by welding, one to the other at the level of the edge while being inclined with respect to each other. Alternatively, they can be formed from a flat sheet folded so as to form two slopes distinct.

Dans l'exemple représenté sur les différentes figures, les cornières présentent des structures et des dimensions identiques. On pourrait bien évidemment concevoir, sans sortir du cadre de la présente invention, d'une part des cornières dont les deux ailes présenteraient des dimensions et/ou des formes différentes, et d'autre part un crible 12 comportant des cornières de différentes dimensions, voire des cornières agencées de manière que les ouvertures de tamisage présentent des formes et des dimensions différentes.In the example shown in the various figures, the angles have identical structures and dimensions. It would obviously be possible to design, without departing from the scope of the present invention, on the one hand angles whose two wings have different dimensions and / or shapes, and on the other hand a screen 12 comprising angles of different dimensions, or even angles arranged so that the screening openings have different shapes and dimensions.

Bien que la présente invention ait été décrite en se référant à des exemples de réalisation spécifiques, il est évident que des modifications et des changements peuvent être effectués sur ces exemples sans sortir de la portée générale de l'invention telle que définie par les revendications.Although the present invention has been described with reference to specific exemplary embodiments, it is evident that modifications and changes can be made to these examples without departing from the general scope of the invention as defined by the claims.

Claims (11)

  1. A machine for conveying (100) a product comprising a discharge line (108), the discharge line (108) comprising means for moving the product, such as a transmission shaft with coils or a progressive cavity pump, the conveying machine further comprising a receiving hopper (106) configured to allow the flow of the product towards the discharge line (108), the product being a fluid screed and/or concrete, the receiving hopper (106) defining a receiving volume and an introduction aperture opening out into the receiving volume, the receiving hopper including a screen (10), the screen (10) including a frame (12) delimiting a sieving surface, and a plurality of sieving apertures (24, 24', 24") formed in the sieving surface to allow the flow of the product through the screen along a flow direction (E), the sieving apertures (24, 24', 24") each being bordered by first and second flow slopes (26, 26', 26", 28, 28', 28") spaced apart from each other and converging towards each other along the flow direction (E), the screen (10) extending over the introduction aperture.
  2. The conveying machine (100) according to claim 1, characterized in that the frame (12) includes first and second opposite sides (14, 16) having a first length, the plurality of sieving apertures (24, 24', 24") extending over all or part of the first length, preferably over more than half of the first length.
  3. The conveying machine (100) according to claim 1 or 2, characterized in that the frame includes a first side (14, 16) having a longitudinal border (30, 32), and a first wing (34, 36) mounted on the longitudinal border, said first wing forming the first slope of a first sieving aperture among the plurality of sieving apertures (24, 24', 24").
  4. The conveying machine (100) according to any one of claims 1 to 3, characterized in that the plurality of sieving apertures (24, 24', 24") is formed by a plurality of angle bars (22, 22', 22").
  5. The conveying machine (100) according to claim 4, characterized in that the angle bars (22, 22', 22") each have first and second wings (38, 38', 38", 40, 40', 40") forming respectively the first and second flow slopes (26, 26', 26", 28, 28', 28"), and each have a ridge (42, 42', 42") linking the first and second wings (38, 38', 38", 40, 40', 40").
  6. The conveying machine (100) according to claim 5, characterized in that, considered along the flow direction (E), the first and second wings (38, 38', 38", 40, 40', 40") form an angle between 10° and 170°, preferably between 60° and 120°.
  7. The conveying machine (100) according to any one of claims 4 to 6, characterized in that it further includes removable fixing means (45) configured to removably mount the plurality of angle bars (22, 22', 22") on the frame (12).
  8. The conveying machine (100) according to any one of claims 4 to 7, further comprising mounting means (44, 46), on which the angle bars (22, 22', 22") are fixed, so as to form a grid, the grid being configured to be removably mounted on the frame (12).
  9. The conveying machine (100) according to claim 8, wherein the mounting means (44, 46) are removably fixed on the frame (12) by the fixing means (45).
  10. The conveying machine (100) according to any one of claims 4 to 9, characterized in that the angle bars (22, 22', 22") extend substantially parallel to each other.
  11. The conveying machine (100) according to any one of claims 1 to 10, characterized in that the screen includes vibration means (60) configured to cooperate with the frame (12) of the screen (10) so as to apply vibrations to the screen (10).
EP17196390.3A 2016-10-13 2017-10-13 Hopper comprising a screen with converging slopes Active EP3308866B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1659903A FR3057468B1 (en) 2016-10-13 2016-10-13 CONVERGENT SLOPE SCREEN

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EP3308866A1 EP3308866A1 (en) 2018-04-18
EP3308866B1 true EP3308866B1 (en) 2022-01-05

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Publication number Priority date Publication date Assignee Title
FR3108345B1 (en) * 2020-03-20 2023-04-21 Pl2M Construction machine
CN111805748A (en) * 2020-07-14 2020-10-23 尤桂兰 Concrete production equipment
CN115042320A (en) * 2022-06-22 2022-09-13 嘉兴上建宏成混凝土有限公司 High-viscosity recycled concrete processing equipment and preparation method thereof
CN116689286A (en) * 2023-05-26 2023-09-05 华能国际电力股份有限公司上海石洞口第二电厂 Coal cinder screening equipment of thermal power plant

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Publication number Priority date Publication date Assignee Title
US347870A (en) * 1886-08-24 Screen
FR2892967B1 (en) * 2005-11-07 2008-02-08 Lancy Mixjet Sarl DEVICE FOR PREPARING A MIXTURE, FOR EXAMPLE FOR A PROJECT MACHINE
FR2996468A1 (en) * 2012-10-04 2014-04-11 Chagneau Jean Marc VARIABLE SPLITTING SORT DEVICE AND CALIBRATION PLATE
DE102014005192A1 (en) * 2014-04-09 2015-10-15 Backers Maschinenbau Gmbh Rust for bulk goods

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FR3057468B1 (en) 2021-01-29
FR3057468A1 (en) 2018-04-20

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