EP3455411B1 - Apparatus for in-place recycling of materials forming part of a roadway pavement - Google Patents

Apparatus for in-place recycling of materials forming part of a roadway pavement Download PDF

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Publication number
EP3455411B1
EP3455411B1 EP17727285.3A EP17727285A EP3455411B1 EP 3455411 B1 EP3455411 B1 EP 3455411B1 EP 17727285 A EP17727285 A EP 17727285A EP 3455411 B1 EP3455411 B1 EP 3455411B1
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EP
European Patent Office
Prior art keywords
blades
rotors
crusher
rotor
pavement
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EP17727285.3A
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German (de)
French (fr)
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EP3455411A1 (en
Inventor
Bouchaïb SAFIR
Claude CAZAL
Thierry LE ROCH'
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Colas SA
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Colas SA
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • E01C23/065—Recycling in place or on the road, i.e. hot or cold reprocessing of paving in situ or on the traffic surface, with or without adding virgin material or lifting of salvaged material; Repairs or resurfacing involving at least partial reprocessing of the existing paving
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/0084—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating garbage, waste or sewage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/14—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers
    • B02C18/142—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers with two or more inter-engaging rotatable cutter assemblies

Definitions

  • the present invention relates to a device for the in situ recycling of materials constituting a traffic road according to the preamble of claim 1.
  • these pavements include materials of the aggregate and bitumen type. It is particularly interesting to be able to reuse these materials for repairing the roadway.
  • the present invention proposes the use of a crusher whose chamber is open towards the bottom and the roadway and implementing simple crushing tools made up of blades. of simple shape driven in rotation. It allows the realization of a pavement treatment machine which can perform all the operations from the milling of the roadway to the spreading on the milled roadway of the reprocessed materials and comprising a crushing and possibly the addition of binder by a ramp integrated in the crushing device and possible mixing of the materials directly in the device crushing.
  • the material recycling pavement treatment machine 1 shown as an example on the figure 4 comprises rolling means on the ground, a roadway 6 in this case, typically tracked means, an engine and control means, in particular for steering, for adjusting the forward speed and for the various components making it up. It further comprises means for storing the materials 9, 9 'which it needs for its operation and, in addition to the fuel, for example for new aggregates or mixes and possibly for bitumen / emulsion 9. On the figure 4 only the bitumen / emulsion 9 and water 9 'feed has been shown, the latter serving in particular for cooling the rotor of the milling machine 2. Some of these storage means may be of the buffer type, that is to say that they are recharged regularly while the machine is working without having to stop the machine.
  • a milling machine 2 producing cutters 7 followed by a crusher 3 followed by a mixer then by a worm-type distributor 4.
  • the milling machine makes it possible to tear off the materials from the roadway over a determined height and width of this roadway, this member being transverse, that is to say perpendicular to the main longitudinal (antero-posterior) extension of the machine.
  • the milling machine which produces mills 7 may be a tooth milling machine or some other type.
  • the crusher 3 located downstream of the milling machine makes it possible to decohesive and crush the mills and produces crushed and possibly kneaded mills 8 if the kneading function has been provided in the crusher.
  • the crusher and the kneader are one and the same unit.
  • the crusher 3 placed under the machine consists in this example of a casing 30 open downwards and therefore the milled roadway.
  • the casing is also open at both its front / upstream and rear / downstream ends to respectively receive the raw cutters produced by the milling machine (inlet front / upstream) and deliver the crushed mills (rear / downstream outlet) once they have been crushed.
  • the cutters received, crushed and delivered by the milling machine rest on the ground and the machine moves on this ground causing there to be a relative displacement between the cutters on the ground and the crusher fixed under the machine.
  • the crusher does not have an insulated crushing chamber above the ground, the cutters mainly remaining on the ground.
  • the width (transverse measurement on the machine) of the crusher corresponding to the width of the inlet of the casing (front / upstream end) is substantially equal to the length (transverse measurement on the machine and corresponding to the width of the milled roadway ) of the milling machine so that all the mills produced are directly swallowed into the crusher.
  • a passive chute or an active means eg. Rotary brushes or other, placed at ground level, collects all the cutters over the milling width to guide them towards the front / upstream inlet of the crusher.
  • the crusher housing internally has two parallel rotors 32 elongated in the longitudinal direction of the machine.
  • the two rotors 32 are substantially parallel to the longitudinal extent of the roadway and they radially comprise metal blades 31.
  • the rotors are driven in rotation by a motor member 33, typically hydraulic.
  • the drive of the rotors in this example uses a chain, the links of which engage on toothed pulleys of the rotors and of the motor member.
  • the housing, the rotors and the motor unit are carried by a frame (symbolized / partially represented by the upright 34 on the Figures 1 to 3 ) coming to be fixed under the machine. Bearings, in particular bearings, are implemented between the moving and fixed parts of the crusher.
  • Each rotor has blades fixed on its periphery which in this example have identical shapes and dimensions.
  • the shape shown is a segment of a circle, that is to say a circular sector, the point / vertex of which is towards the rotor.
  • This segment / sector has a point / vertex angle of between 90 ° and 10 ° and it is approximately 80 ° in the Figures.
  • the blades therefore end in an arc of a circle at their free end opposite their tip / apex attached to the rotor.
  • the rotation of the rotor drives the blades which therefore sweep a tubular sweeping space when viewed along the axis of rotation of the rotors.
  • the two rotors and the blades are arranged in the housing so that the two tubular sweep spaces interpenetrate in an interpenetration zone where the blades of the two rotors arranged in planes parallel to each other may come two by two, by pair 35, facing each other at a short distance from each other, a spacing / free space of determined deviation then being present between the two blades 35 concerned. It will be understood that due to the rotation of the blades, this determined spacing of deviation will be temporary and evolving for the surfaces coming into vis-à-vis the blades concerned and it will be repeated at different times and at different locations for pairs of blades 35 different, the two blades of a pair concerned being two rotors.
  • this difference is one of the main parameters making it possible to modify the granulometry of the crushed mills. For example, with a determined difference between the two blades facing the pair of about 15 mm, it is possible to obtain crushed mills having a homogeneous, continuous particle size, with a controlled dmax between 10 and 14 mm. These values are indicative and can be modified as needed.
  • the free edge in the arc of a circle of each blade comprises a bevelled / tapered part as well as optionally the upper / adjacent part of the side edge (s). Thanks to this, it is possible to lower the crusher as low as possible, until the blades are flush with the surface of the milled pavement, or even slightly nibble it, without this creating too much resistance to the rotation of the rotors due to the fact that it is a small surface (the end of the bevel) which strikes the surface of the milled roadway. Thus, in the lowest possible position of the crusher, even without nibbling, if a bump present on the surface of the milled pavement is encountered, there will be less risk of blocking the rotation.
  • an overload / blockage detector can be implemented on the drive unit or a friction or break clutch is installed on the transmission to the rotors.
  • a metal detector can be provided in front of the machine or of the crusher.
  • one can provide a minimum spacing of the blades along each rotor, apart from what occurs in the interpenetration zone where one must have the determined deviation described for each pair of blades, this minimum spacing corresponding to the average diameter of the metal elements of one can meet in a roadway so that these elements can preferably pass between the blades once torn off.
  • cutting elements can be provided, for example on the rotors or protruding from the latter and which are intended to cut wires, for example from the detection loop on the roadway, which would come to twist on the rotors.
  • the blades can be arranged on the rotors in various ways as long as the crushing occurs, in particular thanks to the shearing effect of the two blades of the pair of the two rotors which come face to face in the interpenetration zone .
  • this is obtained with blades which are flat metal plates and which are mutually parallel for those participating in pairs coming in vis-à-vis with a short distance determined between them in the interpenetration zone.
  • this result can be obtained with blades which are all in planes parallel to each other and perpendicular to the rotors which, it will be recalled, are parallel to each other.
  • the rotors are then horizontal and elongated longitudinally and the blades are in transverse vertical planes.
  • Another solution corresponds to the case where the blades are divided from the point of view of their orientations into two groups. Within each group the blades are in planes parallel to each other. Each rotor has blades of the two groups and the pairs of blades coming in opposite and with the described gap belong to the same group, in a pair one of the blades being on one of the rotors and the other blade on the other rotor.
  • the planes carrying the blades are no longer perpendicular to the axes of the rotors but inclined with respect to this axis.
  • the inclinations are symmetrical between the two groups.
  • the blades are all in vertical planes considering the horizontal rotors. It will be understood that other arrangements of the flat plates forming the blades are possible in order to obtain the same result of crushing the cutters with creation of a determined gap between pairs of blades facing each other in the interpenetration zone.
  • the crusher casing is open downwards and therefore towards the roadway as well as to the front / upstream and rear / downstream for the passage of the cutters entering and leaving the crusher.
  • the housing encloses the rotors and their blades laterally and on top.
  • the housing conforms to the shape of the two tubular sweeping spaces. This casing avoids projections of aggregates and strawberries and participates in the crushing of the strawberries and possibly in mixing if the latter is provided.
  • a mixer is also implemented within the machine.
  • This mixer makes it possible to mix the mills which have undergone crushing with a bituminous binder and / or a certain proportion of aggregates or even “new” mixes in order to regenerate certain properties of the pavement.
  • This mixer can be independent of the crusher but, as an alternative, it can be integrated into the crusher.
  • the rear / downstream part of the crusher has at least one orifice for introducing these additional products.
  • the structure of the blades is modified in this rear / downstream part of the crusher, for example with a different shape and / or orientation of the blades and / or a greater spacing / free space between the blades of the pairs coming in screw. - vis-à-vis the orientation and / or the gap in front / upstream or crushing must be predominant.
  • pallets 38 are installed in the rear / downstream part of the crusher in order to allow efficient mixing of the crushed mills and on which a binder has been spread by a set of nozzles 39.
  • This additional member is an active drive means of the mills produced by the milling machine which is located even further in front of the crusher 3, active drive towards the inside the casing 30 of the crusher 3.
  • This active drive means consists of two endless screws mounted on two front extensions of the rotors 32, at the front of the casing 30.
  • This active drive means can be omitted or made removable. so that it is installed only for treated pavements for which the mills could have difficulty passing through the crusher housing despite the fact that the machine which treats the pavement is moving forward.
  • this active drive means is particularly useful if a binder is already introduced upstream of the crushing, at the level of the milling machine.
  • the speed of rotation of the blades of the crusher must be relatively high, and in any case, higher than that which is conventionally encountered in mixing means.
  • the rotational speed of the rotors can be between 120 and 220 rpm and is preferably about 160 rpm.
  • this different structure can relate to the shape of the blades or above all, their distance when they are opposite and close in the interpenetration zone or even predict that there is no longer or almost no more interpenetration zone in this rear / downstream part.
  • a sub-assembly 4 for distributing the mills mixed 8 by the mixer with the additional products 9 makes it possible to spread them over the width of the milled roadway.
  • This distribution sub-assembly is typically a transverse worm type.
  • a placing and pre-compacting table 5 may be included in the distribution sub-assembly.
  • this distribution sub-assembly is connected to the machine on the site, this distribution sub-assembly being removed for the transport between sites.
  • the distribution sub-assembly forms an integral part of the machine.
  • the width of the crusher (transverse measurement on the housing) can be approximately 1.16 m with a spacing of the two rotors of approximately 0.43 m and the length of the crusher (longitudinal measurement between its upstream / front inlet and its downstream / rear outlet) of about 1.5 m and the height of the crusher (maximum vertical measurement on the housing) can be about 0.5 m .
  • the invention can be implemented with a machine which performs only simple milling and is attached to it at the rear a towed equipment comprising the crusher and possibly the mixer and, preferably, the sub-assembly of distribution and possibly the placement and pre-compaction table.
  • the equipment towed by the simple milling machine is only the crusher and, on the other hand, the mixer and other downstream equipment is another stand-alone machine with a setting and pre-setting table. compaction which circulates autonomously from the simple milling machine which is upstream.
  • the equipment towed by the simple milling machine is only the crusher with its integrated mixer and, on the other hand, the other downstream equipment is another autonomous machine with a placing table and pre-compaction which circulates autonomously from the simple milling machine which is upstream. It will be understood that many other equivalent arrangements are possible for implementing the crusher of the invention and its optional integrated mixer.
  • the method of the invention follows from the description made up to now with the use of a machine with which a milling of the roadway is carried out then a crushing of the mills then a kneading of the crushed mills with additional products then one distributes the materials obtained on the pavement, crushing and mixing taking place in the same part of the machine.
  • additional products are typically a bituminous binder and / or aggregates or even mixes.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Mining & Mineral Resources (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Road Paving Machines (AREA)

Description

DOMAINE TECHNIQUE AUQUEL SE RAPPORTE L'INVENTIONTECHNICAL FIELD TO WHICH THE INVENTION RELATES

La présente invention concerne un dispositif pour le recyclage in situ de matériaux constitutifs d'une chaussée de circulation selon le préambule de la revendication 1.The present invention relates to a device for the in situ recycling of materials constituting a traffic road according to the preamble of claim 1.

ARRIERE-PLAN TECHNOLOGIQUETECHNOLOGICAL BACKGROUND

Les chaussées soumises aux contraintes des véhicules circulants et à l'environnement, notamment les variations climatiques, finissent par se dégrader et il est alors nécessaire de les renouveler. En général, ces chaussées comportent des matériaux de type granulats et bitume. Il est particulièrement intéressant de pouvoir réutiliser ces matériaux pour la réfection de la chaussée. C'est ainsi qu'on a proposé dans des machines adaptées, de réutiliser ces matériaux après leur arrachage de la chaussée en les malaxant dans des chambres de malaxage avec un liant bitumineux ajouté et en les ré-étalant ensuite sur la chaussée d'où ils ont été arrachés. A ce sujet, on peut par exemple citer les documents suivants : US4453856A , US4011023 , DE112008001749T5 ou WO96/26319 . Toutefois, l'arrachage des matériaux de la chaussée, notamment par fraisage, ne permet pas de contrôler la taille des particules arrachées à la chaussée. On a donc proposé des moyens permettant de mieux contrôler cette taille par exemple dans les documents US4637753A et US3843274A WO91/02846 . On connait également les documents WO90/10752A1 , EP0324491A1 , WO2010/017283A2 et EP0158560A1 . Toutefois, les solutions proposées sont complexes à mettre en œuvre et à utiliser notamment du fait de l'utilisation de chambres fermées qui sont d'un accès difficile.Pavements subjected to the constraints of circulating vehicles and the environment, in particular climatic variations, end up degrading and it is then necessary to renew them. In general, these pavements include materials of the aggregate and bitumen type. It is particularly interesting to be able to reuse these materials for repairing the roadway. Thus it has been proposed, in suitable machines, to reuse these materials after their removal from the roadway by mixing them in mixing chambers with an added bituminous binder and then re-spreading them on the roadway from where they were ripped off. In this regard, we can for example cite the following documents: US4453856A , US4011023 , DE112008001749T5 or WO96 / 26319 . However, the removal of materials from the roadway, in particular by milling, does not make it possible to control the size of the particles torn from the roadway. Means have therefore been proposed making it possible to better control this size, for example in documents US4637753A and US3843274A WO91 / 02846 . We also know the documents WO90 / 10752A1 , EP0324491A1 , WO2010 / 017283A2 and EP0158560A1 . However, the solutions proposed are complex to implement and use, in particular due to the use of closed rooms which are difficult to access.

OBJET DE L'INVENTIONOBJECT OF THE INVENTION

Afin de remédier à l'inconvénient précité de l'état de la technique, la présente invention propose l'utilisation d'un concasseur dont la chambre est ouverte vers le bas et la chaussée et mettant en œuvre des outils de concassage simples constitués de pales de forme simple entraînées en rotation. Elle permet la réalisation d'une machine de traitement de la chaussée qui peut exécuter toutes les opérations depuis le fraisage de la chaussée jusqu'à l'étalement sur la chaussée fraisée des matériaux retraités et comprenant un concassage et éventuellement l'ajout de liant par une rampe intégrée au dispositif de concassage et un possible malaxage des matériaux directement dans le dispositif de concassage.In order to remedy the aforementioned drawback of the state of the art, the present invention proposes the use of a crusher whose chamber is open towards the bottom and the roadway and implementing simple crushing tools made up of blades. of simple shape driven in rotation. It allows the realization of a pavement treatment machine which can perform all the operations from the milling of the roadway to the spreading on the milled roadway of the reprocessed materials and comprising a crushing and possibly the addition of binder by a ramp integrated in the crushing device and possible mixing of the materials directly in the device crushing.

Il est proposé, selon l'invention, i un dispositif selon la revendication 1.There is provided, according to the invention, a device according to claim 1.

D'autres caractéristiques non limitatives et avantageuses du dispositif conforme à l'invention, prises individuellement ou selon toutes les combinaisons techniquement possibles, sont les suivantes :

  • la composition liante comporte du bitume,
  • la composition liante comporte des enrobés bitumineux,
  • la composition liante comporte du bitume et des enrobés bitumineux,
  • les pales sont disposées dans des plans perpendiculaires aux axes longitudinaux des rotors, toutes les pales des rotors étant dans des plans parallèles entre eux,
  • les pales sont réparties en deux groupes selon leurs orientations, les pales d'un premier groupe étant disposées dans des plans parallèles entre eux et les pales d'un second groupe étant disposées dans des plans parallèles entre eux, les plans des premier et second groupes n'étant pas parallèles entre eux et non perpendiculaires aux axes longitudinaux des rotors,
  • les plans des premier et second groupes sont inclinés symétriquement entre eux par rapport aux axes longitudinaux des rotors,
  • les plans des premier et second groupes sont parallèles à un axe perpendiculaire à l'axe longitudinal d'un rotor, de préférence ledit axe perpendiculaire à l'axe longitudinal du rotor étant vertical en considérant que les axes longitudinaux des rotors sont horizontaux,
  • les plans des premier et second groupes sont verticaux en considérant que les axes longitudinaux des rotors sont horizontaux,
  • chacun des rotors comporte un ensemble d'unités à pales, chaque unité à pales comportant un nombre déterminé de pales, les pales d'une unité à pales étant disposées sur un moyeu d'unité à pales, ledit moyeu monté sur le rotor étant entraîné en rotation par ledit rotor, lesdits moyeux étant séparés entre eux le long du rotor par des écarteurs chacun de longueur déterminée,
  • les rotors ont une section carrée, les moyeux ont un orifice central de section carrée complémentaire et les moyeux peuvent coulisser le long de leurs rotors respectifs lorsqu'ils ne sont plus contraints par les écarteurs, au moins une partie des écarteurs étant interchangeable entre des écarteurs de longueurs différentes afin de pouvoir sélectionner l'écart entre lesdites deux pales adjacentes parallèles de la paire,
  • le moyeu comporte en outre un moyen de serrage sur le rotor empêchant son coulissement le long du rotor, ledit moyen de serrage devant être desserré pour permettre le coulissement du moyeu le long du rotor,
  • les écarteurs sont omis, le positionnement des moyeux le long des rotors étant assuré par leurs moyens de serrage, de préférence le moyen de serrage étant indexé en positionnement le long du rotor, ledit rotor comportant des encoches ou traversées recevant le moyen de serrage,
  • les écarteurs sont des bagues pouvant s'ouvrir en deux parties, la fermeture des deux parties de la bague autour du rotor étant maintenue par au moins un écrou et boulon traversant lesdites deux parties en périphérie de la bague sans avoir à traverser le rotor,
  • les écarteurs sont des bagues pouvant s'ouvrir en deux parties, la fermeture des deux parties de la bague autour du rotor étant maintenue par au moins un écrou et boulon traversant radialement lesdites deux parties et le rotor transversalement,
  • le carter comporte entre l'extrémité amont et l'extrémité aval du concasseur au moins un orifice d'introduction de la composition liante, la partie du concasseur en aval dudit au moins un orifice d'introduction assurant un malaxage des fraisats concassés avec la composition liante pour former la malaxeuse, le concasseur et la malaxeuse étant dans un seul et même organe, le concasseur ayant dans sa partie aval une fonction de malaxage ou de concassage + malaxage,
  • la partie du concasseur en aval dudit au moins un orifice d'introduction assurant le malaxage des fraisats concassés avec la composition liante n'assure qu'une fonction de malaxage, par exemple notamment du fait que les écarts déterminés entre lesdites deux pales adjacentes parallèles des paires sont différents entre l'amont et l'aval, ledit écart déterminé étant plus important en aval,
  • la partie aval du concasseur assurant le malaxage des fraisats concassés avec la composition liante comporte des palettes de malaxage entraînées en rotation par les rotors,
  • la partie du concasseur en aval dudit au moins un orifice d'introduction assurant le malaxage des fraisats concassés avec la composition liante assure une double fonction de concassage et de malaxage,
  • l'écart entre lesdites deux pales adjacentes parallèles de la paire est constant le long des rotors entre l'extrémité amont et l'extrémité aval du concasseur,
  • l'écart entre lesdites deux pales adjacentes parallèles de la paire varie le long des rotors entre l'extrémité amont et l'extrémité aval du concasseur,
  • l'écart entre lesdites deux pales adjacentes parallèles de la paire est différent entre l'extrémité amont de concassage et l'extrémité aval de concassage et malaxage du concasseur,
  • le concasseur à pales comporte deux rotors tournant dans la même direction,
  • dans une variante, le concasseur à pales comporte deux rotors tournant dans des directions opposées, de préférence les rotations des pales s'effectuant vers le haut dans la zone d'interpénétration,
  • les rotations s'effectuent vers le bas dans la zone d'interpénétration entre les paires de deux pales adjacentes,
  • l'épaisseur déterminée des plaques planes formant les pales est comprise entre 10 mm et 50 mm et les bords latéraux des plaques sont plans et perpendiculaires au plan général de la plaque plane,
  • l'écart déterminé entre les deux pales adjacentes parallèles d'une paire est choisi entre 5 mm et 30 mm,
  • les bords latéraux des plaques sont incurvés sur leur hauteur,
  • les bords latéraux des plaques sont biseautés selon l'épaisseur de la plaque,
  • les bords latéraux des plaques sont munis de dents,
  • le bord radial libre, en arc de cercle, des plaques est plat selon l'épaisseur de la plaque et perpendiculaires au plan général de la plaque plane,
  • le bord radial libre, en arc de cercle, des plaques est biseauté selon l'épaisseur de la plaque,
  • le bord radial libre, en arc de cercle, des plaques est muni de dents,
  • la partie supérieure du carter épouse les formes des espaces de balayage tubulaires,
  • la vitesse de rotation des pales du concasseur est comprise entre 120 et 220 tours/mn,
  • le dispositif constitue une machine automotrice pour le recyclage in situ de matériaux constitutifs d'une chaussée de circulation.
Other non-limiting and advantageous characteristics of the device in accordance with the invention, taken individually or in any technically possible combination, are as follows:
  • the binder composition comprises bitumen,
  • the binder composition comprises bituminous mixes,
  • the binder composition comprises bitumen and bituminous mixes,
  • the blades are arranged in planes perpendicular to the longitudinal axes of the rotors, all the blades of the rotors being in planes parallel to each other,
  • the blades are divided into two groups according to their orientations, the blades of a first group being arranged in planes parallel to each other and the blades of a second group being arranged in planes parallel to each other, the planes of the first and second groups not being parallel to each other and not perpendicular to the longitudinal axes of the rotors,
  • the planes of the first and second groups are inclined symmetrically to each other with respect to the longitudinal axes of the rotors,
  • the planes of the first and second groups are parallel to an axis perpendicular to the longitudinal axis of a rotor, preferably said axis perpendicular to the longitudinal axis of the rotor being vertical, considering that the longitudinal axes of the rotors are horizontal,
  • the planes of the first and second groups are vertical, considering that the longitudinal axes of the rotors are horizontal,
  • each of the rotors has a set of bladed units, each bladed unit having a determined number of blades, the blades of a bladed unit being disposed on a bladed unit hub, said hub mounted on the rotor being driven in rotation by said rotor, said hubs being separated from each other along the rotor by spacers each of determined length,
  • the rotors have a square section, the hubs have a central orifice of complementary square section and the hubs can slide along their respective rotors when they are no longer constrained by the spacers, at least part of the spacers being interchangeable between spacers of different lengths in order to be able to select the distance between said two adjacent parallel blades of the pair,
  • the hub further comprises a clamping means on the rotor preventing its sliding along the rotor, said clamping means having to be loosened to allow the hub to slide along the rotor,
  • the spacers are omitted, the positioning of the hubs along the rotors being ensured by their clamping means, preferably the clamping means being indexed in positioning along the rotor, said rotor comprising notches or feedthroughs receiving the clamping means,
  • the spacers are rings which can be opened in two parts, the closure of the two parts of the ring around the rotor being held by at least one nut and bolt passing through said two parts at the periphery of the ring without having to pass through the rotor,
  • the spacers are rings which can be opened in two parts, the closure of the two parts of the ring around the rotor being maintained by at least one nut and bolt passing radially through said two parts and the rotor transversely,
  • the casing comprises between the upstream end and the downstream end of the crusher at least one orifice for introducing the binder composition, the part of the crusher downstream of said at least one introduction orifice ensuring mixing of the mills crushed with the composition binder to form the kneader, the crusher and the kneader being in a single unit, the crusher having in its downstream part a kneading or crushing + kneading function,
  • the part of the crusher downstream of said at least one introduction orifice ensuring the mixing of the crushed mills with the binder composition only performs a mixing function, for example in particular due to the fact that the distances determined between said two adjacent parallel blades of the pairs are different between upstream and downstream, said determined difference being greater downstream,
  • the downstream part of the crusher ensuring the mixing of the crushed mills with the binder composition comprises mixing vanes driven in rotation by the rotors,
  • the part of the crusher downstream of said at least one introduction orifice ensuring the mixing of the crushed mills with the binder composition ensures a dual function of crushing and mixing,
  • the distance between said two adjacent parallel blades of the pair is constant along the rotors between the upstream end and the downstream end of the crusher,
  • the distance between said two adjacent parallel blades of the pair varies along the rotors between the upstream end and the downstream end of the crusher,
  • the gap between said two adjacent parallel blades of the pair is different between the upstream end of crushing and the downstream end of crushing and mixing of the crusher,
  • the blade crusher has two rotors rotating in the same direction,
  • in a variant, the blade crusher comprises two rotors rotating in opposite directions, preferably the rotations of the blades taking place upwards in the interpenetration zone,
  • the rotations take place downwards in the zone of interpenetration between the pairs of two adjacent blades,
  • the determined thickness of the flat plates forming the blades is between 10 mm and 50 mm and the lateral edges of the plates are plane and perpendicular to the general plane of the flat plate,
  • the distance determined between the two adjacent parallel blades of a pair is chosen between 5 mm and 30 mm,
  • the side edges of the plates are curved over their height,
  • the side edges of the plates are bevelled according to the thickness of the plate,
  • the side edges of the plates are provided with teeth,
  • the free radial edge, in an arc of a circle, of the plates is flat according to the thickness of the plate and perpendicular to the general plane of the flat plate,
  • the free radial edge, in an arc of a circle, of the plates is bevelled according to the thickness of the plate,
  • the free radial edge, in an arc of a circle, of the plates is provided with teeth,
  • the upper part of the housing follows the shapes of the tubular sweeping spaces,
  • the speed of rotation of the crusher blades is between 120 and 220 rpm,
  • the device constitutes a self-propelled machine for in situ recycling of materials constituting a roadway.

DESCRIPTION DETAILLEE D'UN EXEMPLE DE REALISATIONDETAILED DESCRIPTION OF AN EXAMPLE OF AN IMPLEMENTATION

La description qui va suivre en regard des dessins annexés, donnés à titre d'exemples non limitatifs, fera bien comprendre en quoi consiste l'invention et comment elle peut être réalisée.The description which will follow with reference to the appended drawings, given by way of non-limiting examples, will make it clear what the invention consists of and how it can be implemented.

Sur les dessins annexés :

  • la figure 1 représente un exemple de concasseur vu frontalement, par son extrémité avant/amont,
  • la figure 2 représente ce même concasseur vu dorsalement, par son extrémité arrière/aval,
  • la figure 3 représente ce même concasseur vu de dessous,
  • la figure 4 représente une machine de traitement de la chaussée à recyclage de matériaux selon l'invention, et
  • les figures 5 à 8 qui représentent un autre exemple de concasseur, cette fois comportant en aval une fonction de malaxage et à l'avant de son carter des vis sans fin, respectivement en vue en coupe au niveau de buses d'injection de liant, en vue arrière/aval, en vue de dessous et en vue de dessus.
In the accompanying drawings:
  • the figure 1 shows an example of a crusher seen from the front, from its front / upstream end,
  • the figure 2 represents this same crusher seen dorsally, by its rear / downstream end,
  • the figure 3 represents this same crusher seen from below,
  • the figure 4 represents a recycling pavement machine of materials according to the invention, and
  • the figures 5 to 8 which represent another example of a crusher, this time comprising downstream a mixing function and at the front of its housing worm screws, respectively in sectional view at the level of binder injection nozzles, in rear / downstream view, in bottom view and in top view .

DispositifDevice

La machine 1 de traitement de la chaussée à recyclage de matériaux présentée à titre d'exemple sur la figure 4 comporte des moyens de roulement sur le sol, une chaussée 6 en l'espèce, moyens typiquement à chenilles, un moteur et des moyens de contrôle, notamment de direction, de réglage de la vitesse d'avancement et des différents organes la composant. Elle comporte en outre des moyens de stockage des matières 9, 9' dont elle a besoin pour son fonctionnement et, outre pour le carburant, par exemple pour des granulats ou enrobés neufs et éventuellement pour du bitume/émulsion 9. Sur la figure 4 on a seulement représenté l'alimentation en bitume/émulsion 9 et en eau 9', cette dernière servant notamment au refroidissement du rotor de la fraiseuse 2. Certains de ces moyens de stockage peuvent être du type tampon, c'est-à-dire qu'ils sont rechargés régulièrement pendant le travail de la machine sans qu'il soit nécessaire d'arrêter la machine.The material recycling pavement treatment machine 1 shown as an example on the figure 4 comprises rolling means on the ground, a roadway 6 in this case, typically tracked means, an engine and control means, in particular for steering, for adjusting the forward speed and for the various components making it up. It further comprises means for storing the materials 9, 9 'which it needs for its operation and, in addition to the fuel, for example for new aggregates or mixes and possibly for bitumen / emulsion 9. On the figure 4 only the bitumen / emulsion 9 and water 9 'feed has been shown, the latter serving in particular for cooling the rotor of the milling machine 2. Some of these storage means may be of the buffer type, that is to say that they are recharged regularly while the machine is working without having to stop the machine.

Parmi les organes de la machine, on trouve selon une direction longitudinale, à partir de l'avant/amont selon le sens de circulation de la machine se dirigeant vers l'avant, une fraiseuse 2 produisant des fraisats 7 suivie d'un concasseur 3 suivi d'une malaxeuse puis d'une répartisseuse à vis sans fin 4. La fraiseuse permet d'arracher les matériaux de la chaussée sur une hauteur et une largeur déterminées de cette chaussée, cet organe étant transversal, c'est-à-dire perpendiculaire à l'extension longitudinale (antéro-postérieure) principale de la machine. La fraiseuse qui produit des fraisats 7 peut être une fraiseuse à dents ou d'un autre type.Among the organs of the machine, we find in a longitudinal direction, from the front / upstream according to the direction of movement of the machine moving forward, a milling machine 2 producing cutters 7 followed by a crusher 3 followed by a mixer then by a worm-type distributor 4. The milling machine makes it possible to tear off the materials from the roadway over a determined height and width of this roadway, this member being transverse, that is to say perpendicular to the main longitudinal (antero-posterior) extension of the machine. The milling machine which produces mills 7 may be a tooth milling machine or some other type.

Le concasseur 3 situé en aval de la fraiseuse permet de décohésionner et de concasser les fraisats et produit des fraisats concassés et possiblement malaxés 8 si la fonction de malaxage a été prévue dans le concasseur. Dans ce dernier cas, le concasseur et la malaxeuse sont un seul et même organe.The crusher 3 located downstream of the milling machine makes it possible to decohesive and crush the mills and produces crushed and possibly kneaded mills 8 if the kneading function has been provided in the crusher. In the latter case, the crusher and the kneader are one and the same unit.

Le concasseur 3 disposé sous la machine est constitué dans cet exemple d'un carter 30 ouvert vers le bas et donc la chaussée fraisée. Le carter est également ouvert à ses deux extrémités avant/amont et arrière/aval pour respectivement recevoir les fraisats bruts produits par la fraiseuse (entrée avant/amont) et délivrer les fraisats concassés (sortie arrière/aval) une fois ceux-ci concassés. En fait, les fraisats reçus, concassés et délivrés par la fraiseuse reposent sur le sol et la machine se déplace sur ce sol faisant qu'il existe un déplacement relatif entre les fraisats au sol et le concasseur fixé sous la machine. Le concasseur ne comporte pas de chambre de concassage isolée au-dessus du sol, les fraisats restant essentiellement sur le sol. De préférence, la largeur (mesure transversale sur la machine) du concasseur correspondant à la largeur de l'entrée du carter (extrémité avant/amont) est sensiblement égale à la longueur (mesure transversale sur la machine et correspondant à la largeur de chaussée fraisée) de la fraiseuse afin que tous les fraisats produits soient directement avalés dans le concasseur. Au cas où la fraiseuse serait plus longue que la largeur du concasseur, une goulotte passive ou un moyen actif, par ex. balais rotatifs ou autre, disposé au niveau du sol permet de récupérer tous les fraisats sur la largeur de fraisage pour les guider vers l'entrée avant/amont du concasseur.The crusher 3 placed under the machine consists in this example of a casing 30 open downwards and therefore the milled roadway. The casing is also open at both its front / upstream and rear / downstream ends to respectively receive the raw cutters produced by the milling machine (inlet front / upstream) and deliver the crushed mills (rear / downstream outlet) once they have been crushed. In fact, the cutters received, crushed and delivered by the milling machine rest on the ground and the machine moves on this ground causing there to be a relative displacement between the cutters on the ground and the crusher fixed under the machine. The crusher does not have an insulated crushing chamber above the ground, the cutters mainly remaining on the ground. Preferably, the width (transverse measurement on the machine) of the crusher corresponding to the width of the inlet of the casing (front / upstream end) is substantially equal to the length (transverse measurement on the machine and corresponding to the width of the milled roadway ) of the milling machine so that all the mills produced are directly swallowed into the crusher. In case the milling machine is longer than the width of the crusher, a passive chute or an active means, eg. Rotary brushes or other, placed at ground level, collects all the cutters over the milling width to guide them towards the front / upstream inlet of the crusher.

Le carter du concasseur comporte intérieurement deux rotors 32 parallèles allongés dans la direction longitudinale de la machine. Les deux rotors 32 sont sensiblement parallèles à l'étendue longitudinale de la chaussée et ils comportent radialement des pales 31 métalliques. Les rotors sont entraînés en rotation par un organe moteur 33, typiquement hydraulique. L'entraînement des rotors utilise dans cet exemple une chaine dont les maillons s'engrainent sur des poulies dentées des rotors et de l'organe moteur. Le carter, les rotors et l'organe moteur sont portés par un châssis (symbolisé/représenté partiellement par le montant 34 sur les Figures 1 à 3) venant se fixer sous la machine. Des paliers, notamment roulements, sont mis en œuvre entre les parties mobiles et fixes du concasseur. Chaque rotor comporte fixées sur sa périphérie des pales qui ont dans cet exemple des formes et dimensions identiques. La forme représentée est un segment de cercle, c'est-à-dire un secteur circulaire, dont la pointe/sommet est vers le rotor. Ce segment/secteur a un angle de pointe/sommet compris entre 90° et 10° et il est d'environ 80° sur les Figures. Les pales se terminent donc en arc de cercle à leur extrémité libre opposée à leur pointe/sommet fixée au rotor. La rotation du rotor entraîne les pales qui balayent donc un espace de balayage tubulaire lorsque vu selon l'axe de rotation des rotors. Les deux rotors et les pales sont disposés dans le carter de manière à ce que les deux espaces de balayage tubulaires s'interpénètrent dans une zone d'interpénétration où des pales des deux rotors disposées dans des plans parallèles entre eux pourront venir deux par deux, par paire 35, en vis-à-vis à courte distance l'une de l'autre, un écartement/espace libre d'écart déterminé étant alors présent entre les deux pales 35 concernées. On comprend que du fait de la rotation des pales, cet écartement d'écart déterminé sera temporaire et évolutif pour les surfaces venant en vis-à-vis concernées des pales et il se répétera à des moments différents et des emplacements différents pour des paires de pales 35 différentes, les deux pales d'une paire concernée étant des deux rotors.The crusher housing internally has two parallel rotors 32 elongated in the longitudinal direction of the machine. The two rotors 32 are substantially parallel to the longitudinal extent of the roadway and they radially comprise metal blades 31. The rotors are driven in rotation by a motor member 33, typically hydraulic. The drive of the rotors in this example uses a chain, the links of which engage on toothed pulleys of the rotors and of the motor member. The housing, the rotors and the motor unit are carried by a frame (symbolized / partially represented by the upright 34 on the Figures 1 to 3 ) coming to be fixed under the machine. Bearings, in particular bearings, are implemented between the moving and fixed parts of the crusher. Each rotor has blades fixed on its periphery which in this example have identical shapes and dimensions. The shape shown is a segment of a circle, that is to say a circular sector, the point / vertex of which is towards the rotor. This segment / sector has a point / vertex angle of between 90 ° and 10 ° and it is approximately 80 ° in the Figures. The blades therefore end in an arc of a circle at their free end opposite their tip / apex attached to the rotor. The rotation of the rotor drives the blades which therefore sweep a tubular sweeping space when viewed along the axis of rotation of the rotors. The two rotors and the blades are arranged in the housing so that the two tubular sweep spaces interpenetrate in an interpenetration zone where the blades of the two rotors arranged in planes parallel to each other may come two by two, by pair 35, facing each other at a short distance from each other, a spacing / free space of determined deviation then being present between the two blades 35 concerned. It will be understood that due to the rotation of the blades, this determined spacing of deviation will be temporary and evolving for the surfaces coming into vis-à-vis the blades concerned and it will be repeated at different times and at different locations for pairs of blades 35 different, the two blades of a pair concerned being two rotors.

La valeur de cet écart est un des principaux paramètres permettant de modifier la granulométrie des fraisats concassés. Par exemple, avec un écart déterminé entre les deux pales en vis-à-vis de la paire d'environ 15 mm on peut obtenir des fraisats concassés ayant une granulométrie homogène, continue, avec un dmax maitrisé entre 10 et 14 mm. Ces valeurs sont indicatives et peuvent être modifiées en fonction des besoins.The value of this difference is one of the main parameters making it possible to modify the granulometry of the crushed mills. For example, with a determined difference between the two blades facing the pair of about 15 mm, it is possible to obtain crushed mills having a homogeneous, continuous particle size, with a controlled dmax between 10 and 14 mm. These values are indicative and can be modified as needed.

On comprend que du fait de la rotation des deux rotors, ce sont différentes paires de pales parallèles des deux rotors qui viennent en vis-à-vis à courte distance/écart à des moments différents. Les fraisats sont broyés/concassés principalement par l'impact des bords latéraux des pales, et par le faible écart entre les paires de pales qui viennent en vis-à-vis avec un effet de cisaillage lorsque les deux pales de la paire commencent à venir en vis-à-vis. Du fait de cet effet de cisaillage on peut créer des biseaux et/ou dents sur les bords latéraux des pales à la manière des cisailles ou ciseaux, mais contrairement à ces derniers, les pales de la paire restant séparées entre elles par l'écart indiqué lorsqu'elles viennent en vis-à-vis : il n'y a pas de frottement entre les pales des deux rotors.It is understood that due to the rotation of the two rotors, it is different pairs of parallel blades of the two rotors which come face to face at a short distance / gap at different times. The mills are crushed / crushed mainly by the impact of the side edges of the blades, and by the small gap between the pairs of blades which come into vis-à-vis with a shearing effect when the two blades of the pair start to come. opposite. Due to this shearing effect, bevels and / or teeth can be created on the lateral edges of the blades in the manner of shears or scissors, but unlike the latter, the blades of the pair remaining separated from each other by the indicated gap. when they come face to face: there is no friction between the blades of the two rotors.

Dans une variante de réalisation, le bord libre en arc de cercle de chaque pale comporte une partie biseauté/effilée ainsi qu'éventuellement la partie haute/adjacente du/des bords latéraux. Grâce à cela, il est possible de descendre au plus bas possible le concasseur, jusqu'à ce que les pales affleurent la surface de la chaussée fraisée, voir même la grignote légèrement, sans que cela ne crée une résistance trop importante à la rotation des rotors du fait que c'est une faible surface (l'extrémité du biseau) qui vient heurter la surface de la chaussée fraisée. Ainsi, dans la position la plus basse possible du concasseur, même sans grignotage, si une bosse présente sur la surface de la chaussée fraisée est rencontrée, il y aura moins de risque de blocage de la rotation. De préférence, à titre de sécurité, dans le concasseur, un détecteur de surcharge/blocage peut être mis en œuvre sur l'organe moteur ou un embrayage à friction ou à rupture est installé sur la transmission vers les rotors.In an alternative embodiment, the free edge in the arc of a circle of each blade comprises a bevelled / tapered part as well as optionally the upper / adjacent part of the side edge (s). Thanks to this, it is possible to lower the crusher as low as possible, until the blades are flush with the surface of the milled pavement, or even slightly nibble it, without this creating too much resistance to the rotation of the rotors due to the fact that it is a small surface (the end of the bevel) which strikes the surface of the milled roadway. Thus, in the lowest possible position of the crusher, even without nibbling, if a bump present on the surface of the milled pavement is encountered, there will be less risk of blocking the rotation. Preferably at As a safety measure, in the crusher, an overload / blockage detector can be implemented on the drive unit or a friction or break clutch is installed on the transmission to the rotors.

A titre de sécurité supplémentaire, notamment contre des éléments métalliques ayant pu être recouvert par les matériaux de la chaussée, par exemple des têtes de bouche à clef, on peut prévoir un détecteur de métal en avant de la machine ou du concasseur. De plus, on peut prévoir un écartement minimal des pales le long de chaque rotor, en dehors de ce qui se passe dans la zone d'interpénétration où l'on doit avoir l'écart déterminé décrit pour chaque paire de pale, cet écartement minimal correspondant au diamètre moyen des éléments métalliques de l'on peut rencontrer dans une chaussée afin que ces éléments puissent de préférence passer entre les pales une fois arrachés. Enfin, on peut prévoir des éléments tranchants, par exemple sur les rotors ou débordant de ces derniers et qui sont destinés à couper des fils, par exemple de boucle de détection en chaussée, qui viendraient à s'entortiller sur les rotors.By way of additional security, in particular against metallic elements which may have been covered by the materials of the roadway, for example key lock heads, a metal detector can be provided in front of the machine or of the crusher. In addition, one can provide a minimum spacing of the blades along each rotor, apart from what occurs in the interpenetration zone where one must have the determined deviation described for each pair of blades, this minimum spacing corresponding to the average diameter of the metal elements of one can meet in a roadway so that these elements can preferably pass between the blades once torn off. Finally, cutting elements can be provided, for example on the rotors or protruding from the latter and which are intended to cut wires, for example from the detection loop on the roadway, which would come to twist on the rotors.

Les pales peuvent être disposées sur les rotors de diverses manières du moment que le concassage se produit, notamment grâce à l'effet de cisaillage des deux pales de la paire des deux rotors qui viennent en vis-à-vis dans la zone d'interpénétration. De préférence ceci est obtenu avec des pales qui sont des plaques métalliques planes et qui sont parallèles entre elles pour celles participant des paires venant en vis-à-vis à court écart déterminé entre elles dans la zone d'interpénétration. D'une manière simple, on peut obtenir ce résultat avec des pales qui sont toutes dans des plan parallèles entre eux et perpendiculaires aux rotors qui, on le rappelle, sont parallèles entre eux. En considérant que la machine est horizontale sur une chaussée horizontale, les rotors sont alors horizontaux et allongés longitudinalement et les pales sont dans des plans verticaux transversaux. Une autre solution correspond au cas où les pales sont divisées du point de vue de leurs orientations en deux groupes. Au sein de chaque groupe les pales sont dans des plans parallèles entre eux. Chaque rotor comporte des pales des deux groupes et les paires de pales venant en vis-à-vis et avec l'écart décrit appartiennent au même groupe, dans une paire l'une des pales étant sur l'un des rotors et l'autre pale sur l'autre rotor. Les plans portant les pales ne sont plus perpendiculaires aux axes des rotors mais inclinés par rapport à cet axe. De préférence, les inclinaisons sont symétriques entre les deux groupes. A noter que dans l'exemple représenté sur les figures, les pales sont toutes dans des plans verticaux en considérant les rotors horizontaux. On comprend que d'autres dispositions des plaques planes formant les pales sont possibles pour obtenir ce même résultat de concassage des fraisats avec création d'un écart déterminé entre des paires de pales venant en vis-à-vis dans la zone d'interpénétration.The blades can be arranged on the rotors in various ways as long as the crushing occurs, in particular thanks to the shearing effect of the two blades of the pair of the two rotors which come face to face in the interpenetration zone . Preferably this is obtained with blades which are flat metal plates and which are mutually parallel for those participating in pairs coming in vis-à-vis with a short distance determined between them in the interpenetration zone. In a simple manner, this result can be obtained with blades which are all in planes parallel to each other and perpendicular to the rotors which, it will be recalled, are parallel to each other. Considering that the machine is horizontal on a horizontal roadway, the rotors are then horizontal and elongated longitudinally and the blades are in transverse vertical planes. Another solution corresponds to the case where the blades are divided from the point of view of their orientations into two groups. Within each group the blades are in planes parallel to each other. Each rotor has blades of the two groups and the pairs of blades coming in opposite and with the described gap belong to the same group, in a pair one of the blades being on one of the rotors and the other blade on the other rotor. The planes carrying the blades are no longer perpendicular to the axes of the rotors but inclined with respect to this axis. Preferably, the inclinations are symmetrical between the two groups. To note that in the example shown in the figures, the blades are all in vertical planes considering the horizontal rotors. It will be understood that other arrangements of the flat plates forming the blades are possible in order to obtain the same result of crushing the cutters with creation of a determined gap between pairs of blades facing each other in the interpenetration zone.

On rappelle que la machine avance lors du traitement de la chaussée et, de ce fait, les fraisats qui sont sur le sol et qui sont concassés par le concasseur n'ont pas besoin d'être activement poussés vers l'arrière/l'aval. Toutefois, on peut prévoir qu'une orientation particulière des pales, orientation non perpendiculaire aux rotors, puisse assurer en outre un certain transport actif vers l'arrière/aval des fraisats concassés puis possiblement malaxés si un malaxage est prévu en plus.Remember that the machine moves forward during the treatment of the road and, therefore, the cutters which are on the ground and which are crushed by the crusher do not need to be actively pushed back / downstream . However, it can be provided that a particular orientation of the blades, an orientation not perpendicular to the rotors, can also ensure a certain active transport towards the rear / downstream of the mills crushed then possibly mixed if a mixing is additionally provided.

Le carter du concasseur est ouvert vers le bas et donc vers la chaussée ainsi qu'à l'avant/amont et l'arrière/l'aval pour le passage des fraisats en entrée puis sortie du concasseur. Par contre, le carter enferme les rotors et leurs pales latéralement et sur le dessus. Sur le dessus, le carter épouse la forme des deux espaces de balayage tubulaires. Ce carter évite les projections des granulats et fraisats et participe du concassage des fraisats et possiblement au malaxage si ce dernier est prévu.The crusher casing is open downwards and therefore towards the roadway as well as to the front / upstream and rear / downstream for the passage of the cutters entering and leaving the crusher. On the other hand, the housing encloses the rotors and their blades laterally and on top. On the top, the housing conforms to the shape of the two tubular sweeping spaces. This casing avoids projections of aggregates and strawberries and participates in the crushing of the strawberries and possibly in mixing if the latter is provided.

Afin que la machine puisse effectuer le traitement complet de la chaussée, une malaxeuse est également mise en œuvre au sein de la machine. Cette malaxeuse permet de malaxer les fraisats ayant subi le concassage avec un liant bitumineux et/ou une certaine proportion de granulats ou même d'enrobés « neufs » afin de régénérer certaines propriétés de la chaussée. Cette malaxeuse peut être indépendante du concasseur mais, en alternative, elle peut être intégrée au concasseur. A cette fin et comme représenté sur les figures 5 à 8, la partie arrière/aval du concasseur comporte au moins un orifice d'introduction de ces produits additionnels. De préférence, la structuration des pales est modifiée dans cette partie arrière/aval du concasseur, par exemple avec forme et/ou une orientation différente des lames et/ou un écartement/espace libre d'écart supérieur entre les lames des paires venant en vis-à-vis par rapport à l'orientation et/ou l'écart à l'avant/en amont ou le concassage doit être prédominant. En particulier, comme représenté figure 7, on installe des palettes 38 dans la partie arrière/aval du concasseur afin de permettre un malaxage efficace des fraisats concassés et sur lesquels un liant a été répandu par un ensemble de buses 39. De cette manière on peut contrôler dans cette partie arrière/aval du concasseur la présence d'un effet de malaxage en plus d'un effet de concassage et l'importance de l'effet de concassage par rapport au malaxage ou, alors, obtenir un effet de malaxage seul, c'est-à-dire sans effet de concassage.So that the machine can perform the complete pavement treatment, a mixer is also implemented within the machine. This mixer makes it possible to mix the mills which have undergone crushing with a bituminous binder and / or a certain proportion of aggregates or even “new” mixes in order to regenerate certain properties of the pavement. This mixer can be independent of the crusher but, as an alternative, it can be integrated into the crusher. To this end and as shown in the figures 5 to 8 , the rear / downstream part of the crusher has at least one orifice for introducing these additional products. Preferably, the structure of the blades is modified in this rear / downstream part of the crusher, for example with a different shape and / or orientation of the blades and / or a greater spacing / free space between the blades of the pairs coming in screw. - vis-à-vis the orientation and / or the gap in front / upstream or crushing must be predominant. In particular, as shown figure 7 , pallets 38 are installed in the rear / downstream part of the crusher in order to allow efficient mixing of the crushed mills and on which a binder has been spread by a set of nozzles 39. In this way it is possible to control in this rear / downstream part of the crusher the presence of a mixing effect in addition to a crushing effect and the importance of the crushing effect with respect to the mixing or, then, obtain a mixing effect. mixing alone, that is to say without a crushing effect.

On peut voir sur la figure 7 un organe supplémentaire à l'avant du concasseur 3 et en dehors de son carter 30. Cet organe supplémentaire est un moyen d'entraînement actif des fraisats produits par la fraiseuse qui se situe encore plus en avant du concasseur 3, entraînement actif vers l'intérieur du carter 30 du concasseur 3. Ce moyen d'entrainement actif est constitué de deux vis sans fin montées sur deux prolongements antérieurs des rotors 32, à l'avant du carter 30. Ce moyen d'entrainement actif peut être omis ou rendu amovible afin qu'il soit installé seulement pour des chaussées traitées pour lesquelles les fraisats pourraient avoir des difficultés à passer dans le carter du concasseur malgré le fait que la machine qui traite la chaussée avance. En particulier, ce moyen d'entrainement actif est particulièrement utile si un liant est déjà introduit en amont du concassage, au niveau de la fraiseuse.You can see on the figure 7 an additional member at the front of the crusher 3 and outside its casing 30. This additional member is an active drive means of the mills produced by the milling machine which is located even further in front of the crusher 3, active drive towards the inside the casing 30 of the crusher 3. This active drive means consists of two endless screws mounted on two front extensions of the rotors 32, at the front of the casing 30. This active drive means can be omitted or made removable. so that it is installed only for treated pavements for which the mills could have difficulty passing through the crusher housing despite the fact that the machine which treats the pavement is moving forward. In particular, this active drive means is particularly useful if a binder is already introduced upstream of the crushing, at the level of the milling machine.

La vitesse de rotation des pales du concasseur doit être relativement élevée, et en tout cas, plus élevée que celle que l'on rencontre classiquement dans des moyens de malaxage. Typiquement, la vitesse de rotation des rotors peut être comprise entre 120 et 220 tours/mn et est de préférence d'environ 160 tours/mn.The speed of rotation of the blades of the crusher must be relatively high, and in any case, higher than that which is conventionally encountered in mixing means. Typically, the rotational speed of the rotors can be between 120 and 220 rpm and is preferably about 160 rpm.

On comprend alors le possible intérêt de prévoir une structure différente du concasseur dans sa partie arrière/aval de malaxage par rapport à sa partie avant de concassage pur. Comme on l'a vu, cette structure différente peut concerner la forme des pales ou surtout, leur écart lorsqu'elles sont en vis-à-vis et proches dans la zone d'interpénétration ou même prévoir qu'il n'y a plus ou quasi plus de zone d'interpénétration dans cette partie arrière/aval.We can then understand the possible advantage of providing a different structure of the crusher in its rear / downstream mixing part with respect to its front part for pure crushing. As we have seen, this different structure can relate to the shape of the blades or above all, their distance when they are opposite and close in the interpenetration zone or even predict that there is no longer or almost no more interpenetration zone in this rear / downstream part.

A l'arrière de la machine, un sous-ensemble de répartition 4 des fraisats mélangés 8 par la malaxeuse aux produits additionnel 9 permet de les étaler sur la largeur de la chaussée fraisée. Ce sous-ensemble de répartition est typiquement à type de vis sans fin transversale. En outre une table de mise en place et de pré-compactage 5 peut être comprise dans le sous-ensemble de répartition. Dans une modalité de mise en œuvre, ce sous-ensemble de répartition est raccordé à la machine sur le chantier, ce sous-ensemble de répartition étant démonté pour le transport entre les chantiers. Dans une variante, le sous-ensemble de répartition fait partie intégrante de la machine.At the rear of the machine, a sub-assembly 4 for distributing the mills mixed 8 by the mixer with the additional products 9 makes it possible to spread them over the width of the milled roadway. This distribution sub-assembly is typically a transverse worm type. In addition, a placing and pre-compacting table 5 may be included in the distribution sub-assembly. In one implementation method, this distribution sub-assembly is connected to the machine on the site, this distribution sub-assembly being removed for the transport between sites. In one variant, the distribution sub-assembly forms an integral part of the machine.

A titre d'exemple des dimensions possibles d'un concasseur selon l'invention, la largeur du concasseur (mesure transversale sur le carter) peut être d'environ 1,16 m avec un écartement des deux rotors d'environ 0,43 m et la longueur du concasseur (mesure longitudinale entre son entrée amont/avant et sa sortie aval/arrière) d'environ 1,5 m et la hauteur du concasseur (mesure verticale maximale sur le carter) peut être d'environ 0,5 m.As an example of the possible dimensions of a crusher according to the invention, the width of the crusher (transverse measurement on the housing) can be approximately 1.16 m with a spacing of the two rotors of approximately 0.43 m and the length of the crusher (longitudinal measurement between its upstream / front inlet and its downstream / rear outlet) of about 1.5 m and the height of the crusher (maximum vertical measurement on the housing) can be about 0.5 m .

On vient de présenter une machine intégrant le concasseur et le malaxeur. Toutefois, l'invention peut être mise en œuvre avec une machine qui n'effectue qu'un fraisage simple et on lui adjoint à l'arrière un équipement remorqué comportant le concasseur et possiblement le malaxeur et, de préférence, le sous-ensemble de répartition et éventuellement la table de mise en place et de pré-compactage. D'une manière équivalente, l'équipement remorqué par la machine de fraisage simple n'est que le concasseur et, par contre, le malaxeur et autres équipements d'aval sont une autre machine autonome à table de mise en place et de pré-compactage qui circule d'une manière autonome de la machine de fraisage simple qui est en amont. D'une autre manière équivalente, l'équipement remorqué par la machine de fraisage simple n'est que le concasseur avec son malaxeur intégré et, par contre, les autres équipements d'aval sont une autre machine autonome à table de mise en place et de pré-compactage qui circule d'une manière autonome de la machine de fraisage simple qui est en amont. On comprend que bien d'autres dispositions équivalentes sont possibles pour mettre en œuvre le concasseur de l'invention et son éventuel malaxeur intégré.We have just presented a machine integrating the crusher and the mixer. However, the invention can be implemented with a machine which performs only simple milling and is attached to it at the rear a towed equipment comprising the crusher and possibly the mixer and, preferably, the sub-assembly of distribution and possibly the placement and pre-compaction table. Equivalently, the equipment towed by the simple milling machine is only the crusher and, on the other hand, the mixer and other downstream equipment is another stand-alone machine with a setting and pre-setting table. compaction which circulates autonomously from the simple milling machine which is upstream. In another equivalent way, the equipment towed by the simple milling machine is only the crusher with its integrated mixer and, on the other hand, the other downstream equipment is another autonomous machine with a placing table and pre-compaction which circulates autonomously from the simple milling machine which is upstream. It will be understood that many other equivalent arrangements are possible for implementing the crusher of the invention and its optional integrated mixer.

ProcédéProcess

Le procédé de l'invention découle de la description faite jusqu'à présent avec la mise en œuvre d'une machine avec laquelle on pratique un fraisage de la chaussée puis un concassage des fraisats puis un malaxage des fraisats concassé avec des produits additionnels puis on réparti les matériaux obtenus sur la chaussée, le concassage et le malaxage ayant lieu dans le même organe de la machine. Ces produits additionnels sont typiquement un liant bitumineux et/ou des granulats ou même des enrobés.The method of the invention follows from the description made up to now with the use of a machine with which a milling of the roadway is carried out then a crushing of the mills then a kneading of the crushed mills with additional products then one distributes the materials obtained on the pavement, crushing and mixing taking place in the same part of the machine. These additional products are typically a bituminous binder and / or aggregates or even mixes.

Claims (10)

  1. A device (1) for the in-place recycling of materials constituting a road pavement, said pavement (6) including aggregates agglomerated in a bituminous composition, said apparatus including a load-bearing structure adapted to circulate on said pavement, along the latter in a direction of travel, and carrying, from upstream to downstream in the direction of travel, a transverse milling machine (2) for disintegrating the pavement over determined height and depth and producing milling debris (7), a mixer for mixing the milling debris with a binding composition (9), and a sub-assembly for distributing (4) the milling debris mixed (8) with the binding composition over the width of the milled pavement,
    characterized in that it further includes a crusher (3) with blades (31) intended to crush on the ground the milling debris before the mixing of the milling debris with the binding composition, and
    in that the crusher (3) with blades (31) includes at least two longitudinal rotors (32) parallel to each other and arranged in a casing (30), the rotors (32) being substantially parallel to the pavement (6), said casing (30) being closed at its two longitudinal lateral sides and its upper face, said casing being open towards the bottom, i.e. on the pavement side, and at its two upstream, milling machine side, and downstream ends, each of the rotors (32) including a set of blades (31) arranged radially around the rotor (32) and that each blade (31) is a planar plate of determined thickness and in the shape of a circular sector with the tip towards the rotor, and in that the blades of each rotor sweeping, during their simultaneous rotation, a tubular sweeping space coaxial to the rotor, the tubular sweeping spaces of adjacent rotors interpenetrating each other in an interpenetration area, the blades of adjacent rotors being configured so as to create, in the interpenetration area between pairs of two adjacent blades parallel and the closest to each other of the two adjacent rotors, and coming opposite to each other during their rotation, a spacing of determined size between said two parallel adjacent blades of the pair.
  2. The device according to claim 1, characterized in that the blades (31) are arranged in planes perpendicular to the longitudinal axes of the rotors (32), all the blades of the rotors being in planes parallels to each other.
  3. The device according to claim 1, characterized in that the blades (31) are subdivided into two groups according to the orientation thereof, the blades of a first group being arranged in planes parallel to each other and the blades of a second group being arranged in planes parallel to each other, the planes of the first and second groups being not parallel between each other and not perpendicular to the longitudinal axes of the rotors (32).
  4. The device according to any one of claims 1 to 3, characterized in that each of the rotors (32) includes a set of units with blades (31), each bladed unit including a determined number of blades (31), the blades (31) of a bladed unit being arranged on a bladed unit hub, said hub mounted on the rotor being rotated by said rotor, said hubs being separated from each other along the rotor by spacers, each being of determined length.
  5. The device according to claim 4, characterized in that the rotors (32) have a square cross-section, the hubs have a central orifice of complementary square cross-section and in that the hubs can slide along their respective rotors when they are no longer stressed by the spacers, at least one part of the spacers being interchangeable between spacers of different lengths so that the spacing between said two parallel adjacent blades of the pair can be selected.
  6. The device according to any one of claims 1 to 5, characterized in that the casing (30) includes, between the upstream end and the downstream end of the crusher, at least one orifice for introduction of the binding composition (9), the part of the crusher downstream from said at least one introduction orifice providing a mixing of the crushed milling debris with the biding composition (9) to form the mixer, the crusher and the mixer being located in a single and same element.
  7. The device according to any one of claims 1 to 6, characterized in that the crusher (3) with blades (31) includes two rotors (32) rotating in opposite directions, and in that the determined thickness of the planar plates forming the blades is comprised between 10 mm and 50 mm, and the lateral edges of the plates are planar and perpendicular to the general plane of the planar plate, and in that the determined spacing between the two parallel adjacent blades of a pair is chosen between 5 mm and 30 mm.
  8. The device according to any one of claims 1 to 7, characterized in that the upper part of the crusher (30) conforms the shapes of the tubular sweeping spaces.
  9. The device according to any one of claims 1 to 8, characterized in that the rotation speed of the blades of the crusher is comprised between 120 and 220 rpm.
  10. The device according to any one of claims 1 to 9, characterized in that it is an automotive machine for the in-place recycling of materials constituting a road pavement, said machine comprising means for rolling on the pavement, an engine, and control means for at least controlling steering, running speed and elements of the machine.
EP17727285.3A 2016-05-10 2017-05-09 Apparatus for in-place recycling of materials forming part of a roadway pavement Active EP3455411B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1654159A FR3051202B1 (en) 2016-05-10 2016-05-10 DEVICE FOR THE IN SITU RECYCLING OF MATERIALS OF A CIRCULATION PAVEMENT AND SPECIALLY ADAPTED CRUSHER
PCT/FR2017/051106 WO2017194873A1 (en) 2016-05-10 2017-05-09 Apparatus for in-place recycling of materials forming part of a roadway pavement, and crusher for milling debris from a roadway pavement

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EP3455411A1 EP3455411A1 (en) 2019-03-20
EP3455411B1 true EP3455411B1 (en) 2020-08-05

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EP (1) EP3455411B1 (en)
DK (1) DK3455411T3 (en)
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FR3125244A1 (en) * 2021-07-16 2023-01-20 Soprema Heating mixer for composite products with regulated output
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Publication number Publication date
DK3455411T3 (en) 2020-10-19
FR3051202A1 (en) 2017-11-17
FR3051202B1 (en) 2019-03-22
EP3455411A1 (en) 2019-03-20
WO2017194873A1 (en) 2017-11-16
US10619314B2 (en) 2020-04-14
US20190145065A1 (en) 2019-05-16

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