EP2014430A1 - Installation for preparing a moist material such as concrete or mortar - Google Patents

Installation for preparing a moist material such as concrete or mortar Download PDF

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Publication number
EP2014430A1
EP2014430A1 EP08158278A EP08158278A EP2014430A1 EP 2014430 A1 EP2014430 A1 EP 2014430A1 EP 08158278 A EP08158278 A EP 08158278A EP 08158278 A EP08158278 A EP 08158278A EP 2014430 A1 EP2014430 A1 EP 2014430A1
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EP
European Patent Office
Prior art keywords
chamber
mixing device
mixing
installation
dry material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08158278A
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German (de)
French (fr)
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EP2014430B1 (en
Inventor
Daniel Comoy
Nicolas Royer
Luc Courtes
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.)
Saint Gobain Weber SA
Original Assignee
Weber et Broutin SA
Weber et Broutin France SA
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Publication of EP2014430A1 publication Critical patent/EP2014430A1/en
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Classifications

    • 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
    • B28C5/1276—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 consecutive separate containers with rotating stirring and feeding or discharging means
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/04—Supplying or proportioning the ingredients
    • B28C7/06—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors
    • B28C7/064—Supply from sacks; Sack openers

Definitions

  • the invention relates to a preparation plant, from a dry material ready for use, a wet material concrete or mortar type that is to say a wet material consisting of a mixture of aggregates (eg sand, gravel, etc.), binder (s) (eg hydrated lime, cement, etc.) and water.
  • a wet material concrete or mortar type that is to say a wet material consisting of a mixture of aggregates (eg sand, gravel, etc.), binder (s) (eg hydrated lime, cement, etc.) and water.
  • facade plaster colored or not
  • facade plaster can also be used for the realization of floors, walls, ceilings or slabs, indoors or outdoors.
  • the facades of the building are usually covered with plaster.
  • This coating can be prepared according to different methods and with different installations. The oldest is to pour a mass of dry material ready for use in a mixing tank and to add a volume of water determined in the tank, depending on the mass of dry material, then to knead the whole during a long cycle, often of the order of several minutes, typically between 5 and 10 min, in order to obtain the desired coating.
  • the coating contained in the mixing tank is then poured and stored in a receiving hopper.
  • a pump connected, on one side, to the bottom of the hopper and, on the other, to a projection lance allows pumping and projecting the coating on the facades to be covered.
  • a disadvantage of this method is the duration of the mixing cycle, because the user who does not know well anticipate its needs of coating, is often found out of coating, forced to wait for a mixing cycle ends, which forces him to take breaks in the projection. These breaks may be longer as long as the mixing cycle is long.
  • a known installation of this type is described and represented on the Figures 1 to 3 of FR 2832349 .
  • the mixing device of this installation has two successive chambers between which opens the water injection circuit: a dry material transport chamber and a chamber mixing the material with the water. At the outlet of the mixing chamber, the desired coating is obtained.
  • the disadvantages of the latter type of installation are related to the fact that the mixing step of the material is very short, so that the mixture obtained (i.e. the coating) is "heavy" and can be homogeneous.
  • adjuvants such as air entrainers
  • the mixing step is too short for them to have time to take effect.
  • lightening fillers such as glass beads or vermiculite, but these fillers are expensive and therefore increase the cost price of the coating.
  • the problem of homogeneity of the mixture is particularly troublesome for tinted coatings because the hue of the coating may vary from one place to another of the facade on which it is projected.
  • the invention aims to provide an installation for preparing in a virtually continuous manner, a wet material concrete or mortar type that does not have the problems of "heaviness” and homogeneity above.
  • such an installation comprises a mixing device, a feed device for supplying the mixing device with a concrete or mortar type dry material, a water injection circuit connected to the mixing device, a receiving hopper and a mixing device interposed between the mixing device and said hopper, so as to be able to mix the material leaving the mixing device before sending it to said hopper.
  • the mixing device By kneading the material leaving the mixing device, it is homogenized and lightened by aerating it. If air trainers are used, they have time to produce their effects.
  • the duration of the kneading cycle remains short, typically between 1 and 3 minutes, since the material has been previously mixed (ie mixed with water) in said mixing device.
  • the hopper is therefore supplied with material kneaded very frequently and the preparation of the material is therefore almost continuous.
  • the installation comprises a pump for pumping the final material stored in said receiving hopper and supplying a projection system of said final material.
  • the hopper is frequently supplied, there is no time to empty this hopper between two supplies, so that the projection of the material can be done continuously.
  • Said feed device may be a flexible container in the form of a large bag, called “big bag", directly supplying dry material to the mixing device.
  • big bag directly supplying dry material to the mixing device.
  • the word “directly” is used to mean that no intermediate element, especially no hopper, is used between the mixing device and the flexible container to regulate the flow of material in the mixing device.
  • Said container is filled with a dry material ready to be mixed and contains, for example, from 750 to 1250 kg of this material.
  • a dry material ready to be mixed and contains, for example, from 750 to 1250 kg of this material.
  • feed devices may nevertheless be used and, in particular, a feed hopper whose outlet opening is connected to the inlet opening of the mixing device.
  • the feed hopper can be surmounted by a grid on which one comes to disembowel and empty bags of dry material (often bags of 20 or 50 kg).
  • This type of feeding device is interesting for small sites, requiring a small amount of material.
  • the installation comprises a device for lifting and suspending said supply device, whether it is said flexible container or said feed hopper.
  • the installation comprises a rolling frame on which are mounted the mixing device, the mixing device, the receiving hopper and any lifting device and suspension. This makes it possible to move the complete installation to the site, which is immediately operational.
  • the example of installation of the figures comprises a mixing device, or spoiler 2, a feed device for feeding the mixing device in a concrete or mortar type dry material, a water injection circuit (not shown). ) connected to the stripper 2, a receiving hopper 4 and a mixing device, or kneader 6, interposed between the striker 2 and said hopper 4, so as to be able to mix the wet material leaving the stripper before sending it to the hopper 4.
  • the installation comprises a rolling frame on which are mounted the mixer 2, the mixer 6, and the receiving hopper 4, as well as all the other elements of the installation.
  • This chassis comprises a central axle 14 carrying the wheels 15 and, at the front, an arrow 16 for its attachment to a vehicle capable of towing the installation.
  • the power supply means 17 of the installation are located at the rear of the chassis (it is usually a heat engine) and feed all the elements of the installation.
  • the installation is automobile.
  • the installation is then more bulky but develops more power and allows, in particular, to lift flexible containers of higher weight (see below).
  • Said feed device comprises a flexible container 8 in the form of a big bag, or "big bag", which directly feeds dry material 2.
  • the flexible container 8 presents successively from top to bottom: a main storage part 8a, a bottom portion 8b forming a funnel and a discharge chute 8c.
  • This flexible container 8 is formed of several fabric panels assembled together, in particular by stitching.
  • the discharge chute 8c is held closed with a tight tie around it when the container is not in use or moved.
  • the flexible container 8 in the form of a large bag directly supplies the dry material 2 with the dry material:
  • the discharge chute 8c of the flexible container 8 is of tubular shape and is connected to the inlet mouth of the funnel 2, formed by a vertical tubular sleeve 10.
  • the chute 8c is passed and tightened around said sleeve with a link.
  • the structure, the shape and the dimensions of the flexible container 8 are such that once the container is suspended and the discharge chute 8c open, the container empties completely and continuously, by gravity, into the funnel 2.
  • the installation comprises a device for lifting and suspending said container 8.
  • a crane 12 This crane 12 , is mounted on one side of the frame of the installation, at the axle 14.
  • two support arms 18 are provided at the base of the crane 12. These support arms 18 are articulated on the frame so as to be folded against the installation during transport, and be unfolded according to the arrows f and positioned in V when using the crane 12.
  • Vertically sliding feet 20 are mounted at the end of the arms 18.
  • the lifting of the flexible container 8 can be carried out without the risk of tilting of the installation .
  • the crane 12 then makes it possible to hold the flexible container 8 in position above the stripper 2.
  • the mixer 2 of the plant has two successive chambers between which opens the water injection circuit: a transport chamber 30 of the dry material, and a mixing chamber 32 of the material with the injected water. These rooms are clearly visible on the figure 2 , where the stripper 2 is shown partially etched.
  • the mixing water supply circuit is not shown in the figures. Only the water injection port 34, to which this circuit is connected, is shown. This water injection mouth 34 is located between the chambers 30 and 32.
  • Said transport chamber 30 has two successive sub-chambers: an expansion sub-chamber 30a of the dry material and a sub-metering chamber 30b for regulating the volume of dry material transferred to the mixing chamber 32.
  • the stripper 2 comprises a sleeve 36 inside which is disposed a shaft 38 rotated and which passes right through the sleeve 36.
  • This shaft 38 is oriented in the longitudinal direction of the installation (ie in fore-aft direction, if one refers to the direction of advancement of the installation when towed) and presents, at the level of the transport chamber 30 (located at the front) a first conveying screw-shaped portion 38a and, at the mixing chamber 32 (located at the rear of the chamber 30) a second portion 38b provided with blades mixers 39.
  • the stripper 2 comprises a helical spring 40 disposed around said transport screw 38a.
  • the helical spring 40 and the transport screw are coaxial and rotate at the same speed, in the same direction.
  • the speed of rotation of the transport screw 38a is 230 rpm, knowing that this speed is generally less than 300 rpm.
  • the combined action of this coil spring 40 and the transport screw 38a aerate the dry material and break any clumps of material.
  • the section of the sleeve 36 of the funnel decreases between the expansion sub-chamber 30a and the metering sub-chamber 30b so as to form a portion of the funnel sheath 36a, said coil spring 40 being generally conical at the of this portion.
  • This portion of funnel sheath 36a creates a constriction upstream of the metering sub-chamber 30b, so as to "stuff" the sub-chamber 30b and thus avoid creating voids in the material passing through the sub-chamber 30b .
  • This aspect is important because the amount of water injected through the injection port 34 is proportional to the theoretical flow rate of the material in the metering sub-chamber 30b.
  • the dry material After passing through the metering sub-chamber 30b, the dry material is wetted and mixed with the water injected through the injection port 34 into the mixing chamber 32, thanks to the movement of the blades 39. This is the pressure the injected water and the continuous arrival of the dry material which advance the material until the exit of the stripper 2. In output, after the mixing step, a wet material is obtained, often too dense and not homogeneous enough for most intended applications.
  • the aeration and the homogenization of this wet material are carried out in the kneader 6, located downstream of the kneader 2 (the upstream and the front are defined relative to the normal flow direction of the material passing through the installation).
  • the mixer 6 comprises a mixing chamber 42 with a second shaft 43 rotated and provided with mixing blades 44.
  • the mixer 42 has a transport chamber 46 located upstream of the chamber of the mixing chamber. 42, and wherein the material leaving the funnel 2 is transported to the mixing chamber 42
  • the shaft 43 is oriented perpendicular to the shaft 38 of the stripper 2 (ie in the transverse direction of the installation) and the transport chamber 46 is in the extension of the spoiler 2, at the rear of it.
  • the shaft 43 has a first conveying screw-shaped portion at the transport chamber 46 and a second portion carrying the blades 44 at the mixing chamber 42.
  • the mixing chamber 42 has in its lateral wall a hatch 48 opening into the receiving hopper 4. This hatch 48 is positioned so that the blades 44, rotating, push the material to the hatch 48.
  • the hatch opening 48 is controlled according to the residence time of the material in the mixing chamber 42, desired by the user. Once the mixing chamber 42 emptied, the trap closes and the process starts again.
  • the mixing of the wet material by the blades 44 makes it possible to evolve the material until reaching the desired density and homogeneity.
  • the plant was used to prepare a colored coating.
  • a coating with a density of 1.65 was obtained which was too high for the intended application, namely to cover an external facade.
  • the coating had a poor homogeneity, resulting in different areas of coloring.
  • a more homogeneous coating with a density of about 1.50 was obtained.
  • the wet material leaving the mixer 2 has a density and a homogeneity considered sufficient for these applications.
  • the mixing of the material is unnecessary and the installation works with the hatch 48 which remains open, so that the residence time of the material in the mixer 6 is reduced to a minimum.
  • dyes are metered and added at the mixer 6 before each mixing. It is also possible to add other liquid admixtures (for example an accelerator) to the mixer 6. For this purpose, an adjuvant compartment (not shown) may be provided.
  • a transport screw 50 for conveying the material up to a pump 52.
  • the transport screw 50 like the axis of the pump 52, are oriented parallel to and adjacent to the shaft 38 of the stripper 2 (i.e. in the longitudinal direction of the frame).
  • the pump 52 is used to pump the final material stored in said receiving hopper and to feed a projection system of said final material (not shown).
  • the capacity of the receiving hopper and the rate of production of the final material are such that, at the maximum pumping speed, it is possible to change said flexible container without interrupting the projection of the final material.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Abstract

The installation has a supply device provided with a flexible container i.e. big bag, for supplying a dry material e.g. concrete, to a mixing device or mixer (2). A water injection circuit is connected to the mixing device. A kneading device or kneader (6) is interposed between the mixing device and a receiving hopper (4) to knead the dry material leaving from the mixing device before transferring the dry material towards the receiving hopper. The mixing device has a dry material transporting chamber (30) and a dry material mixing chamber (32) that mixes the dry material with water.

Description

L'invention a pour objet une installation de préparation, à partir d'un matériau sec prêt à l'emploi, d'un matériau humide de type béton ou mortier c'est-à-dire un matériau humide constitué d'un mélange d'agrégat(s) (e.g. sable, graviers, etc.), de liant(s) (e.g. chaux hydratée, ciment, etc.) et d'eau.The invention relates to a preparation plant, from a dry material ready for use, a wet material concrete or mortar type that is to say a wet material consisting of a mixture of aggregates (eg sand, gravel, etc.), binder (s) (eg hydrated lime, cement, etc.) and water.

Elle est destinée, plus particulièrement, à la préparation d'enduit de façade (coloré ou non) mais peut également servir à la réalisation de sols, murs, plafonds ou dalles, en intérieur ou en extérieur.It is intended, in particular, for the preparation of facade plaster (colored or not) but can also be used for the realization of floors, walls, ceilings or slabs, indoors or outdoors.

Après la construction du gros oeuvre d'un bâtiment, les façades du bâtiment sont généralement recouvertes d'enduit. Cet enduit peut être préparé selon différentes méthodes et avec différentes installations. La plus ancienne consiste à verser une masse de matériau sec prêt à l'emploi dans une cuve de malaxage et à ajouter dans la cuve un volume d'eau déterminé, fonction de la masse de matériau sec, puis à malaxer l'ensemble pendant un cycle de longue durée, souvent de l'ordre de plusieurs minutes, typiquement entre 5 et 10 min, afin d'obtenir l'enduit souhaité. L'enduit contenu dans la cuve de malaxage est ensuite déversé et stocké dans une trémie de réception. Une pompe reliée, d'un côté, au fond de la trémie et, de l'autre, à une lance de projection permet de pomper et de projeter l'enduit sur les façades à recouvrir.After the construction of the structural work of a building, the facades of the building are usually covered with plaster. This coating can be prepared according to different methods and with different installations. The oldest is to pour a mass of dry material ready for use in a mixing tank and to add a volume of water determined in the tank, depending on the mass of dry material, then to knead the whole during a long cycle, often of the order of several minutes, typically between 5 and 10 min, in order to obtain the desired coating. The coating contained in the mixing tank is then poured and stored in a receiving hopper. A pump connected, on one side, to the bottom of the hopper and, on the other, to a projection lance allows pumping and projecting the coating on the facades to be covered.

Un inconvénient de cette méthode est la durée du cycle de malaxage, car l'utilisateur qui ne sait pas bien anticiper ses besoins en enduit, se retrouve souvent à court d'enduit, obligé d'attendre qu'un cycle de malaxage se termine, ce qui l'oblige à faire des pauses dans la projection. Ces pauses risquent d'être d'autant plus longues que le cycle de malaxage est long.A disadvantage of this method is the duration of the mixing cycle, because the user who does not know well anticipate its needs of coating, is often found out of coating, forced to wait for a mixing cycle ends, which forces him to take breaks in the projection. These breaks may be longer as long as the mixing cycle is long.

D'autres installations connues permettent d'éviter l'inconvénient précité, en assurant une préparation continue de l'enduit. Elles comprennent un dispositif de gâchage, un dispositif d'alimentation pour alimenter le dispositif de gâchage en un matériau sec de type béton ou mortier, un circuit d'injection d'eau raccordé au dispositif de gâchage, et une pompe raccordée directement à la sortie du dispositif de gâchage.Other known installations make it possible to avoid the aforementioned drawback by ensuring a continuous preparation of the coating. They comprise a mixing device, a feeding device for supplying the mixing device with a concrete or mortar type dry material, a water injection circuit connected to the mixing device, and a pump connected directly to the outlet. of the mixing device.

Une installation connue de ce type est décrite et représentée sur les figures 1 à 3 de FR 2832349 . Le dispositif de gâchage de cette installation présente deux chambres successives entre lesquelles débouche le circuit d'injection d'eau : une chambre de transport du matériau sec et une chambre de mélange du matériau avec l'eau. A la sortie de la chambre de mélange, on obtient l'enduit souhaité.A known installation of this type is described and represented on the Figures 1 to 3 of FR 2832349 . The mixing device of this installation has two successive chambers between which opens the water injection circuit: a dry material transport chamber and a chamber mixing the material with the water. At the outlet of the mixing chamber, the desired coating is obtained.

Une autre installation connue de ce type est décrite dans le document EP 1 527 811 A1 .Another known installation of this type is described in the document EP 1 527 811 A1 .

Les inconvénients de ce dernier type d'installation sont liés au fait que l'étape de mélange du matériau est très courte, de sorte que le mélange obtenu (i.e. l'enduit) est "lourd" et peut homogène. Pour pallier au problème de lourdeur du mélange, on lui ajoute des adjuvants tels que des entraîneurs d'air, mais l'étape de mélange est trop courte pour que ces derniers aient le temps de faire effet. On peut également ajouter des charges d'allègement, comme des billes de verre ou de la vermiculite, mais ces charges sont onéreuses et augmentent donc le prix de revient de l'enduit. Le problème d'homogénéité du mélange est particulièrement gênant pour les enduits teintés car la teinte de l'enduit risque de varier d'un endroit à l'autre de la façade sur laquelle il est projeté.The disadvantages of the latter type of installation are related to the fact that the mixing step of the material is very short, so that the mixture obtained (i.e. the coating) is "heavy" and can be homogeneous. To overcome the problem of heaviness of the mixture, it adds adjuvants such as air entrainers, but the mixing step is too short for them to have time to take effect. It is also possible to add lightening fillers, such as glass beads or vermiculite, but these fillers are expensive and therefore increase the cost price of the coating. The problem of homogeneity of the mixture is particularly troublesome for tinted coatings because the hue of the coating may vary from one place to another of the facade on which it is projected.

L'invention a pour but de proposer une installation permettant de préparer de façon quasiment continue, un matériau humide de type béton ou mortier qui ne présente pas les problèmes de "lourdeur" et d'homogénéité précités.The invention aims to provide an installation for preparing in a virtually continuous manner, a wet material concrete or mortar type that does not have the problems of "heaviness" and homogeneity above.

Conformément à l'invention, une telle installation comprend un dispositif de gâchage, un dispositif d'alimentation pour alimenter le dispositif de gâchage en un matériau sec de type béton ou mortier, un circuit d'injection d'eau raccordé au dispositif de gâchage, une trémie de réception et un dispositif de malaxage interposé entre le dispositif de gâchage et ladite trémie, de manière à pouvoir malaxer le matériau sortant du dispositif de gâchage avant de l'envoyer vers ladite trémie.According to the invention, such an installation comprises a mixing device, a feed device for supplying the mixing device with a concrete or mortar type dry material, a water injection circuit connected to the mixing device, a receiving hopper and a mixing device interposed between the mixing device and said hopper, so as to be able to mix the material leaving the mixing device before sending it to said hopper.

En malaxant le matériau sortant du dispositif de gâchage, on l'homogénéise et on l'allège en l'aérant. Si des entraîneurs d'air sont utilisés, ils ont le temps de produire leurs effets.By kneading the material leaving the mixing device, it is homogenized and lightened by aerating it. If air trainers are used, they have time to produce their effects.

Par ailleurs, la durée du cycle de malaxage reste courte, typiquement entre 1 et 3 minutes, puisque le matériau a été préalablement gâché (i.e. mélangé avec de l'eau) dans ledit dispositif de gâchage. La trémie est donc approvisionnée en matériau malaxé très fréquemment et la préparation du matériau est donc quasiment continue.Furthermore, the duration of the kneading cycle remains short, typically between 1 and 3 minutes, since the material has been previously mixed (ie mixed with water) in said mixing device. The hopper is therefore supplied with material kneaded very frequently and the preparation of the material is therefore almost continuous.

Selon un mode de réalisation de l'installation, celle-ci comprend une pompe pour pomper le matériau final stocké dans ladite trémie de réception et alimenter un système de projection dudit matériau final. La trémie étant fréquemment approvisionnée, on n'a pas le temps de vider cette trémie entre deux approvisionnements, de sorte que la projection du matériau peut se faire en continu.According to one embodiment of the installation, it comprises a pump for pumping the final material stored in said receiving hopper and supplying a projection system of said final material. The hopper is frequently supplied, there is no time to empty this hopper between two supplies, so that the projection of the material can be done continuously.

Ledit dispositif d'alimentation peut être un conteneur souple en forme de gros sac, appelé "big bag", alimentant directement en matériau sec le dispositif de gâchage. Le mot "directement" est employé pour signifier qu'aucun élément intermédiaire, notamment aucune trémie, n'est utilisé entre le dispositif de gâchage et le conteneur souple pour réguler l'écoulement du matériau dans le dispositif de gâchage.Said feed device may be a flexible container in the form of a large bag, called "big bag", directly supplying dry material to the mixing device. The word "directly" is used to mean that no intermediate element, especially no hopper, is used between the mixing device and the flexible container to regulate the flow of material in the mixing device.

Ledit conteneur est rempli d'un matériau sec prêt à être gâché et contient, par exemple, de 750 à 1250 kg de ce matériau. Ainsi, le remplacement du conteneur est peu fréquent et il n'est pas nécessaire de mobiliser de façon permanente un opérateur pour l'alimentation du dispositif de gâchage.Said container is filled with a dry material ready to be mixed and contains, for example, from 750 to 1250 kg of this material. Thus, the replacement of the container is infrequent and it is not necessary to permanently mobilize an operator for feeding the mixing device.

D'autres dispositifs d'alimentation peuvent néanmoins être utilisés et, notamment, une trémie d'alimentation dont l'ouverture de sortie est raccordée à l'ouverture d'entrée du dispositif de gâchage. Dans ce cas, la trémie d'alimentation peut être surmontée d'une grille sur laquelle on vient éventrer et vider des sacs de matériau sec (souvent des sacs de 20 ou 50 kg). Ce type de dispositif d'alimentation est intéressant pour les petits chantiers, nécessitant une faible quantité de matériau.Other feed devices may nevertheless be used and, in particular, a feed hopper whose outlet opening is connected to the inlet opening of the mixing device. In this case, the feed hopper can be surmounted by a grid on which one comes to disembowel and empty bags of dry material (often bags of 20 or 50 kg). This type of feeding device is interesting for small sites, requiring a small amount of material.

Avantageusement, l'installation comprend un dispositif de levage et de suspension dudit dispositif d'alimentation, qu'il s'agisse dudit conteneur souple ou de ladite trémie d'alimentation.Advantageously, the installation comprises a device for lifting and suspending said supply device, whether it is said flexible container or said feed hopper.

Enfin, selon un mode de réalisation, l'installation comprend un châssis roulant sur lequel sont montés le dispositif de gâchage, le dispositif de malaxage, la trémie de réception et l'éventuel dispositif de levage et de suspension. Ceci permet de pouvoir déplacer l'installation complète sur le chantier, celle-ci étant tout de suite opérationnelle.Finally, according to one embodiment, the installation comprises a rolling frame on which are mounted the mixing device, the mixing device, the receiving hopper and any lifting device and suspension. This makes it possible to move the complete installation to the site, which is immediately operational.

L'invention et ses avantages seront bien compris à la lecture de la description détaillée qui suit. Cette description fait référence aux planches de figures annexées sur lesquelles :

  • la figure 1 est une vue en perspective d'un exemple d'installation selon l'invention; et
  • la figure 2 est une vue de dessus de l'installation de la figure 1, privée de certains éléments dont le conteneur souple et le dispositif de levage.
The invention and its advantages will be well understood on reading the detailed description which follows. This description refers to the plates of annexed figures in which:
  • the figure 1 is a perspective view of an example of an installation according to the invention; and
  • the figure 2 is a top view of the installation of the figure 1 , deprived of certain elements including the flexible container and the lifting device.

L'exemple d'installation des figures comprend un dispositif de gâchage, ou gâcheur 2, un dispositif d'alimentation pour alimenter le dispositif de gâchage en un matériau sec de type béton ou mortier, un circuit d'injection d'eau (non représenté) raccordé au gâcheur 2, une trémie de réception 4 et un dispositif de malaxage, ou malaxeur 6, interposé entre le gâcheur 2 et ladite trémie 4, de manière à pouvoir malaxer le matériau humide sortant du gâcheur avant de l'envoyer vers la trémie 4.The example of installation of the figures comprises a mixing device, or spoiler 2, a feed device for feeding the mixing device in a concrete or mortar type dry material, a water injection circuit (not shown). ) connected to the stripper 2, a receiving hopper 4 and a mixing device, or kneader 6, interposed between the striker 2 and said hopper 4, so as to be able to mix the wet material leaving the stripper before sending it to the hopper 4.

L'installation comprend un châssis roulant sur lequel sont montés le gâcheur 2, le malaxeur 6, et la trémie de réception 4, ainsi que tous les autres éléments de l'installation. Ce châssis comprend un essieu central 14 porteur des roues 15 et, à l'avant, une flèche 16 pour son accrochage à un véhicule capable de tracter l'installation. Les moyens d'alimentation en énergie 17 de l'installation se situent à l'arrière du châssis (il s'agit généralement d'un moteur thermique) et alimentent l'ensemble des éléments de l'installation.The installation comprises a rolling frame on which are mounted the mixer 2, the mixer 6, and the receiving hopper 4, as well as all the other elements of the installation. This chassis comprises a central axle 14 carrying the wheels 15 and, at the front, an arrow 16 for its attachment to a vehicle capable of towing the installation. The power supply means 17 of the installation are located at the rear of the chassis (it is usually a heat engine) and feed all the elements of the installation.

Selon un autre mode de réalisation (non représenté) l'installation est automobile. L'installation est alors plus encombrante mais développe plus de puissance et permet, notamment, de lever des conteneurs souples de poids plus élevé (voir ci-après).According to another embodiment (not shown) the installation is automobile. The installation is then more bulky but develops more power and allows, in particular, to lift flexible containers of higher weight (see below).

Ledit dispositif d'alimentation comprend un conteneur souple 8 en forme de gros sac, ou "big bag", qui alimente directement en matériau sec le gâcheur 2. Le conteneur souple 8 présente successivement de haut en bas : une partie principale de stockage 8a, une partie de fond 8b formant entonnoir et une goulotte de vidange 8c. Ce conteneur souple 8 est formé de plusieurs panneaux de toile assemblés entre eux, notamment par couture. La goulotte de vidange 8c est maintenue fermée avec un lien serré autour d'elle lorsque le conteneur n'est pas utilisé ou déplacé.Said feed device comprises a flexible container 8 in the form of a big bag, or "big bag", which directly feeds dry material 2. The flexible container 8 presents successively from top to bottom: a main storage part 8a, a bottom portion 8b forming a funnel and a discharge chute 8c. This flexible container 8 is formed of several fabric panels assembled together, in particular by stitching. The discharge chute 8c is held closed with a tight tie around it when the container is not in use or moved.

Le conteneur souple 8 en forme de gros sac alimente directement en matériau sec le gâcheur 2 : la goulotte de vidange 8c du conteneur souple 8 est de forme tubulaire et est raccordée à la bouche d'entrée du gâcheur 2, formée par un manchon tubulaire vertical 10. Dans l'exemple, la goulotte 8c est passée et serrée autour dudit manchon avec un lien.The flexible container 8 in the form of a large bag directly supplies the dry material 2 with the dry material: the discharge chute 8c of the flexible container 8 is of tubular shape and is connected to the inlet mouth of the funnel 2, formed by a vertical tubular sleeve 10. In the example, the chute 8c is passed and tightened around said sleeve with a link.

Avantageusement, la structure, la forme et les dimensions du conteneur souple 8 sont telles qu'une fois le conteneur suspendu et la goulotte de vidange 8c ouverte, le conteneur se vide entièrement et de façon continue, par gravité, dans le gâcheur 2.Advantageously, the structure, the shape and the dimensions of the flexible container 8 are such that once the container is suspended and the discharge chute 8c open, the container empties completely and continuously, by gravity, into the funnel 2.

Compte tenu du poids du conteneur souple 8, généralement au moins égal à 750 kg, l'installation comprend un dispositif de levage et de suspension dudit conteneur 8. Dans l'exemple, il s'agit d'une grue 12. Cette grue 12, est montée d'un côté du châssis de l'installation, au niveau de l'essieu 14. Pour garantir la stabilité de l'installation lors du levage d'un conteneur souple 8, deux bras d'appui 18 sont prévus à la base de la grue 12. Ces bras d'appui 18 sont articulés sur le châssis de manière à pouvoir être repliés contre l'installation lors du transport, et être dépliés suivant les flèches f et positionnés en V lorsqu'on utilise la grue 12. Des pieds 20 coulissant verticalement sont montés à l'extrémité des bras 18. Une fois les bras 18 dépliés en V et les pieds 20 en appui sur le sol, le levage du conteneur souple 8 peut être effectué sans risque de basculement de l'installation. La grue 12 permet ensuite de maintenir le conteneur souple 8 en position au dessus du gâcheur 2.Given the weight of the flexible container 8, generally at least equal to 750 kg, the installation comprises a device for lifting and suspending said container 8. In the example, it is a crane 12. This crane 12 , is mounted on one side of the frame of the installation, at the axle 14. To guarantee the stability of the installation during the lifting of a flexible container 8, two support arms 18 are provided at the base of the crane 12. These support arms 18 are articulated on the frame so as to be folded against the installation during transport, and be unfolded according to the arrows f and positioned in V when using the crane 12. Vertically sliding feet 20 are mounted at the end of the arms 18. Once the arms 18 have been unfolded in a V and the legs 20 resting on the ground, the lifting of the flexible container 8 can be carried out without the risk of tilting of the installation . The crane 12 then makes it possible to hold the flexible container 8 in position above the stripper 2.

Le gâcheur 2 de l'installation présente deux chambres successives entre lesquelles débouche le circuit d'injection d'eau : une chambre de transport 30 du matériau sec, et une chambre de mélange 32 du matériau avec l'eau injectée. Ces chambres sont bien visibles sur la figure 2, où le gâcheur 2 est représenté partiellement écorché. Le circuit d'alimentation en eau de gâchage n'est pas représenté sur les figures. Seule la bouche d'injection d'eau 34, sur laquelle est branché ce circuit, est représentée. Cette bouche d'injection d'eau 34 se situe entre les chambres 30 et 32.The mixer 2 of the plant has two successive chambers between which opens the water injection circuit: a transport chamber 30 of the dry material, and a mixing chamber 32 of the material with the injected water. These rooms are clearly visible on the figure 2 , where the stripper 2 is shown partially etched. The mixing water supply circuit is not shown in the figures. Only the water injection port 34, to which this circuit is connected, is shown. This water injection mouth 34 is located between the chambers 30 and 32.

Ladite chambre de transport 30 présente deux sous-chambres successives : une sous-chambre de foisonnement 30a du matériau sec et une sous-chambre de dosage 30b permettant de réguler le volume de matériau sec transféré vers la chambre de mélange 32.Said transport chamber 30 has two successive sub-chambers: an expansion sub-chamber 30a of the dry material and a sub-metering chamber 30b for regulating the volume of dry material transferred to the mixing chamber 32.

Plus précisément, le gâcheur 2 comprend un fourreau 36 à l'intérieur duquel est disposé un arbre 38 entraîné en rotation et qui traverse de part en part le fourreau 36. Cet arbre 38 est orienté dans le sens longitudinal de l'installation (i.e. dans la direction avant-arrière, si l'on se réfère au sens d'avancement de l'installation lorsqu'elle est tractée) et présente, au niveau de la chambre de transport 30 (située à l'avant) une première portion en forme de vis de transport 38a et, au niveau de la chambre de mélange 32 (située à l'arrière de la chambre 30) une deuxième portion 38b munie de pales mélangeuses 39.More specifically, the stripper 2 comprises a sleeve 36 inside which is disposed a shaft 38 rotated and which passes right through the sleeve 36. This shaft 38 is oriented in the longitudinal direction of the installation (ie in fore-aft direction, if one refers to the direction of advancement of the installation when towed) and presents, at the level of the transport chamber 30 (located at the front) a first conveying screw-shaped portion 38a and, at the mixing chamber 32 (located at the rear of the chamber 30) a second portion 38b provided with blades mixers 39.

Dans la chambre de foisonnement 30a, le gâcheur 2 comprend un ressort hélicoïdal 40 disposé autour de ladite vis de transport 38a. Avantageusement, le ressort hélicoïdal 40 et la vis de transport sont coaxiaux et tournent à la même vitesse, dans le même sens. Par exemple, la vitesse de rotation de la vis de transport 38a est de 230 tr/min, sachant que cette vitesse est généralement inférieure à 300 tr/min. L'action combinée de ce ressort hélicoïdal 40 et de la vis de transport 38a permet d'aérer le matériau sec et de casser les mottes de matériau éventuelles.In the expansion chamber 30a, the stripper 2 comprises a helical spring 40 disposed around said transport screw 38a. Advantageously, the helical spring 40 and the transport screw are coaxial and rotate at the same speed, in the same direction. For example, the speed of rotation of the transport screw 38a is 230 rpm, knowing that this speed is generally less than 300 rpm. The combined action of this coil spring 40 and the transport screw 38a aerate the dry material and break any clumps of material.

Par ailleurs, la section du fourreau 36 du gâcheur diminue entre la sous-chambre de foisonnement 30a et la sous-chambre de dosage 30b de manière à former une portion de fourreau en entonnoir 36a, ledit ressort hélicoïdal 40 étant de forme générale conique au niveau de cette portion. Cette portion de fourreau en entonnoir 36a crée un étranglement en amont de la sous-chambre de dosage 30b, de manière à "gaver" la sous chambre 30b et éviter ainsi qu'il se crée des espaces vides dans le matériau traversant la sous chambre 30b. Cet aspect est important, car la quantité d'eau injectée par la bouche d'injection 34 est proportionnelle au débit théorique du matériau dans la sous-chambre de dosage 30b. Si la sous-chambre de dosage 30b était mal alimentée en matériau, le débit réel du matériau serait inférieur au débit théorique et une proportion d'eau trop importante serait ajoutée, ce qui se traduirait par un matériau trop humide à la sortie du gâcheur 2.Furthermore, the section of the sleeve 36 of the funnel decreases between the expansion sub-chamber 30a and the metering sub-chamber 30b so as to form a portion of the funnel sheath 36a, said coil spring 40 being generally conical at the of this portion. This portion of funnel sheath 36a creates a constriction upstream of the metering sub-chamber 30b, so as to "stuff" the sub-chamber 30b and thus avoid creating voids in the material passing through the sub-chamber 30b . This aspect is important because the amount of water injected through the injection port 34 is proportional to the theoretical flow rate of the material in the metering sub-chamber 30b. If the metering sub-chamber 30b was poorly supplied with material, the actual flow rate of the material would be lower than the theoretical flow rate and a too high proportion of water would be added, which would result in a material that was too wet at the outlet of the mixer 2 .

Après avoir traversé la sous-chambre de dosage 30b, le matériau sec est mouillé et mélangé à l'eau injectée par la bouche d'injection 34, dans la chambre de mélange 32, grâce au mouvement des pales 39. C'est la pression de l'eau injectée et l'arrivée continue du matériau sec qui font avancer le matériau jusqu'à la sortie du gâcheur 2. En sortie, après l'étape de mélange, on obtient un matériau humide, souvent trop dense et pas assez homogène pour la plupart des applications envisagées.After passing through the metering sub-chamber 30b, the dry material is wetted and mixed with the water injected through the injection port 34 into the mixing chamber 32, thanks to the movement of the blades 39. This is the pressure the injected water and the continuous arrival of the dry material which advance the material until the exit of the stripper 2. In output, after the mixing step, a wet material is obtained, often too dense and not homogeneous enough for most intended applications.

L'aération et l'homogénéisation de ce matériau humide sont réalisées dans le malaxeur 6, situé en aval du gâcheur 2 (l'amont et l'avant sont définis par rapport au sens d'écoulement normal du matériau traversant l'installation).The aeration and the homogenization of this wet material are carried out in the kneader 6, located downstream of the kneader 2 (the upstream and the front are defined relative to the normal flow direction of the material passing through the installation).

Le malaxeur 6 comprend une chambre de malaxage 42 avec un deuxième arbre 43 entraîné en rotation et muni de pales de malaxage 44. Dans l'exemple, le malaxeur 42 présente une chambre de transport 46 située en amont de la chambre de la chambre de malaxage 42, et dans laquelle le matériau sortant du gâcheur 2 est transporté vers la chambre de malaxage 42 L'arbre 43 est orienté perpendiculairement à l'arbre 38 du gâcheur 2 (i.e. dans le sens transversal de l'installation) et la chambre de transport 46 se situe dans le prolongement du gâcheur 2, à l'arrière de celui-ci. L'arbre 43 présente une première portion en forme de vis de transport, au niveau de la chambre de transport 46, et une deuxième portion portant les pales 44, au niveau de la chambre de malaxage 42.The mixer 6 comprises a mixing chamber 42 with a second shaft 43 rotated and provided with mixing blades 44. In the example, the mixer 42 has a transport chamber 46 located upstream of the chamber of the mixing chamber. 42, and wherein the material leaving the funnel 2 is transported to the mixing chamber 42 The shaft 43 is oriented perpendicular to the shaft 38 of the stripper 2 (ie in the transverse direction of the installation) and the transport chamber 46 is in the extension of the spoiler 2, at the rear of it. The shaft 43 has a first conveying screw-shaped portion at the transport chamber 46 and a second portion carrying the blades 44 at the mixing chamber 42.

La chambre de malaxage 42 présente dans sa paroi latérale une trappe 48 débouchant dans la trémie de réception 4. Cette trappe 48 est positionnée de sorte que les pales 44, en tournant, poussent le matériau vers la trappe 48. L'ouverture de la trappe 48 est commandée en fonction du temps de séjour du matériau dans la chambre de malaxage 42, souhaité par l'utilisateur. Une fois la chambre de malaxage 42 vidée, la trappe se referme et le processus recommence.The mixing chamber 42 has in its lateral wall a hatch 48 opening into the receiving hopper 4. This hatch 48 is positioned so that the blades 44, rotating, push the material to the hatch 48. The hatch opening 48 is controlled according to the residence time of the material in the mixing chamber 42, desired by the user. Once the mixing chamber 42 emptied, the trap closes and the process starts again.

Le malaxage du matériau humide par les pales 44 permet de faire évoluer le matériau jusqu'à atteindre la densité et l'homogénéité souhaitées. Par exemple, on a utilisé l'installation pour préparer un enduit coloré. A la sortie du gâcheur 2, on a obtenu un enduit de densité voisine de 1,65 trop élevée pour l'application envisagée, à savoir recouvrir une façade extérieure. En outre, l'enduit présentait une mauvaise homogénéité, se traduisant par des zones de coloration différentes. Après 1 min 30 s de malaxage dans la chambre de malaxage 42, on a obtenu un enduit plus homogène de densité voisine de 1,50.The mixing of the wet material by the blades 44 makes it possible to evolve the material until reaching the desired density and homogeneity. For example, the plant was used to prepare a colored coating. At the outlet of the stripper 2, a coating with a density of 1.65 was obtained which was too high for the intended application, namely to cover an external facade. In addition, the coating had a poor homogeneity, resulting in different areas of coloring. After 1 min 30 s of mixing in the mixing chamber 42, a more homogeneous coating with a density of about 1.50 was obtained.

On notera que pour certaines applications, le matériau humide sortant du gâcheur 2 présente une densité et une homogénéité jugées suffisantes pour ces applications. Dans ce cas, le malaxage du matériau est inutile et l'installation fonctionne avec la trappe 48 qui reste ouverte, de sorte que le temps de séjour du matériau dans le malaxeur 6 est réduit au minimum.It should be noted that for certain applications, the wet material leaving the mixer 2 has a density and a homogeneity considered sufficient for these applications. In this case, the mixing of the material is unnecessary and the installation works with the hatch 48 which remains open, so that the residence time of the material in the mixer 6 is reduced to a minimum.

On notera également que, lorsqu'on souhaite réaliser un matériau teinté et que le matériau sec de départ (i.e. avant gâchage) n'est pas préteinté (i.e. ne contient pas de colorants), des colorants sont dosés et ajoutés au niveau du malaxeur 6 avant chaque malaxage. On peut également ajouter au niveau du malaxeur 6 d'autres adjuvants liquides (par exemple un accélérateur). A cet effet, un compartiment à adjuvants (non représenté) peut être prévu.It will also be noted that, when it is desired to produce a tinted material and that the starting dry material (ie before mixing) is not preintinted (ie does not contain dyes), dyes are metered and added at the mixer 6 before each mixing. It is also possible to add other liquid admixtures (for example an accelerator) to the mixer 6. For this purpose, an adjuvant compartment (not shown) may be provided.

Une fois le matériau suffisamment malaxé dans la chambre de malaxage 42, le matériau s'écoule dans la trémie de réception 4 via la trappe 48. Au fond de cette trémie de réception 4 se trouve une vis de transport 50 permettant d'acheminer le matériau jusqu'à une pompe 52. Par exemple, il s'agit d'une pompe à vis excentrée (ou pompe Moineau). La vis de transport 50, comme l'axe de la pompe 52, sont orientées parallèlement à l'arbre 38 du gâcheur 2 (i.e. dans le sens longitudinal du châssis) et à côté de celui-ci. La pompe 52 permet de pomper le matériau final stocké dans ladite trémie de réception et d'alimenter un système de projection dudit matériau final (non représenté).Once the material sufficiently kneaded in the mixing chamber 42, the material flows into the receiving hopper 4 via the hatch 48. At the bottom of this receiving hopper 4 is a transport screw 50 for conveying the material. up to a pump 52. For example, it is an eccentric screw pump (or sparrow pump). The transport screw 50, like the axis of the pump 52, are oriented parallel to and adjacent to the shaft 38 of the stripper 2 (i.e. in the longitudinal direction of the frame). The pump 52 is used to pump the final material stored in said receiving hopper and to feed a projection system of said final material (not shown).

Avantageusement, la contenance de la trémie de réception et la vitesse de production du matériau final sont telles qu'à la vitesse de pompage maximum on puisse procéder au changement dudit conteneur souple, sans interruption de la projection du matériau final.Advantageously, the capacity of the receiving hopper and the rate of production of the final material are such that, at the maximum pumping speed, it is possible to change said flexible container without interrupting the projection of the final material.

Enfin, on notera que l'agencement des différents éléments de l'installation, permet d'obtenir une installation compacte. Notamment, on notera la compacité de l'ensemble gâcheur 2, malaxeur 6 et trémie 4 avec la trémie 4 et le gâcheur 2 disposés côte à côte et orientés parallèlement, tandis que le malaxeur 6 est disposé à l'arrière de ces deux éléments, et orienté perpendiculairement à ceux-ci.Finally, it will be noted that the arrangement of the various elements of the installation makes it possible to obtain a compact installation. Notably, note the compactness of the set 2, mixer 6 and hopper 4 with the hopper 4 and the mixer 2 arranged side by side and oriented parallel, while the mixer 6 is disposed at the rear of these two elements, and oriented perpendicular thereto.

Claims (15)

Installation de préparation d'un matériau humide de type béton ou mortier, comprenant un dispositif de gâchage (2), un dispositif d'alimentation pour alimenter le dispositif de gâchage en un matériau sec, et un circuit d'injection d'eau raccordé au dispositif de gâchage, caractérisée en ce qu'elle comprend une trémie de réception (4) et un dispositif de malaxage (6) interposé entre le dispositif de gâchage (2) et la trémie de réception (4), de manière à pouvoir malaxer le matériau humide sortant du dispositif de gâchage (2) avant de l'envoyer vers ladite trémie (4).Installation for the preparation of a wet material of the concrete or mortar type, comprising a mixing device (2), a feed device for feeding the mixing device with a dry material, and a water injection circuit connected to the mixing device, characterized in that it comprises a receiving hopper (4) and a mixing device (6) interposed between the mixing device (2) and the receiving hopper (4), so as to be able to mix the wet material leaving the mixing device (2) before sending it to said hopper (4). Installation selon la revendication 1, dans laquelle le dispositif de gâchage (2) présente deux chambres successives entre lesquelles débouche le circuit d'injection d'eau : une chambre de transport (30) du matériau sec et une chambre de mélange (32) du matériau avec l'eau.Installation according to claim 1, wherein the mixing device (2) has two successive chambers between which the water injection circuit opens: a transport chamber (30) of the dry material and a mixing chamber (32) of the material with water. Installation selon la revendication 2, dans laquelle la chambre de transport (30) du matériau sec présente deux sous-chambres successives : une sous-chambre de foisonnement (30a) du matériau sec et une sous-chambre de dosage (30b) permettant de réguler le volume de matériau sec transféré vers ladite chambre de mélange (32).Installation according to claim 2, wherein the transport chamber (30) of the dry material has two successive sub-chambers: an expansion sub-chamber (30a) of the dry material and a metering sub-chamber (30b) for regulating the volume of dry material transferred to said mixing chamber (32). Installation selon la revendication 2 ou 3, dans laquelle le dispositif de gâchage (2) comprend un fourreau (36) à l'intérieur duquel est disposé un premier arbre (38) entraîné en rotation qui présente, au niveau de la chambre de transport (30), une première portion (38a) en forme de vis de transport et, au niveau de la chambre de mélange (32), une deuxième portion (38b) munie de pales mélangeuses (39).Plant according to claim 2 or 3, wherein the mixing device (2) comprises a sheath (36) inside which is arranged a first shaft (38) driven in rotation which has, at the level of the transport chamber ( 30), a first conveying screw-shaped portion (38a) and, at the mixing chamber (32), a second portion (38b) provided with mixing blades (39). Installation selon les revendications 3 et 4, dans laquelle le dispositif de gâchage comprend au niveau de ladite sous-chambre de foisonnement (30a) un ressort hélicoïdal (40) disposé autour de ladite première portion (38a) en forme de vis de transport.Installation according to claims 3 and 4, wherein the mixing device comprises at said expansion sub-chamber (30a) a coil spring (40) disposed around said first portion (38a) in the form of a transport screw. Installation selon la revendication 5, dans laquelle la section du fourreau (36) du dispositif de gâchage (2) diminue entre la sous-chambre de foisonnement (30a) et la sous-chambre de dosage (30b) de manière à former une portion de fourreau (36a) en entonnoir, ledit ressort hélicoïdal (40) ayant une forme générale conique au niveau de cette portion de fourreau (36a).Plant according to claim 5, wherein the section of the sheath (36) of the mixing device (2) decreases between the expansion sub-chamber (30a) and the metering sub-chamber (30b) so as to form a portion of funnel sheath (36a), said coil spring (40) having a generally conical shape at this sleeve portion (36a). Installation selon l'une quelconque des revendications 1 à 6, dans laquelle le dispositif de malaxage (6) comprend une chambre de malaxage (42) avec un deuxième arbre (43) entraîné en rotation et muni de pales de malaxage (44).Plant according to any one of claims 1 to 6, wherein the mixing device (6) comprises a mixing chamber (42) with a second shaft (43) driven in rotation and provided with mixing blades (44). Installation selon l'une quelconque des revendications 1 à 7, dans laquelle le dispositif de malaxage (6) présente une chambre de transport (46) dans laquelle le matériau sortant du dispositif de gâchage (2) est transporté vers ladite chambre de malaxage (42).Plant according to any one of claims 1 to 7, wherein the mixing device (6) has a transport chamber (46) in which the material leaving the mixing device (2) is conveyed to said mixing chamber (42). ). Installation selon l'une quelconque des revendications 1 à 8, dans laquelle le dispositif d'alimentation comprend un conteneur souple (8) en forme de gros sac qui alimente directement en matériau sec le dispositif de gâchage (2).Plant according to any one of claims 1 to 8, wherein the feed device comprises a flexible container (8) in the form of a large bag which directly feeds dry material mixing device (2). Installation selon l'une quelconque des revendications 1 à 9, comprenant une pompe pour pomper le matériau final stocké dans ladite trémie de réception (4) et alimenter un système de projection dudit matériau final.Plant according to any one of claims 1 to 9, comprising a pump for pumping the final material stored in said receiving hopper (4) and supplying a projection system of said final material. Installation selon l'une quelconque des revendications 1 à 10, comprenant un dispositif de levage et de suspension dudit dispositif d'alimentation.Installation according to any one of claims 1 to 10, comprising a device for lifting and suspending said feeder. Installation selon l'une quelconque des revendications 1 à 11, comprenant un châssis roulant sur lequel sont montés le dispositif de gâchage (2), le dispositif de malaxage (6), et la trémie de réception (4).Installation according to any one of claims 1 to 11, comprising a rolling frame on which are mounted the mixing device (2), the mixing device (6), and the receiving hopper (4). Installation selon la revendication 7 et l'une quelconque des revendications 1 à 12, dans laquelle ladite chambre de malaxage (42) présente dans sa paroi latérale une trappe (48) débouchant dans la trémie de réception (4).Installation according to claim 7 and any one of claims 1 to 12, wherein said mixing chamber (42) has in its side wall a hatch (48) opening into the receiving hopper (4). Installation selon la revendication 13, comprenant des moyens pour commander l'ouverture de ladite trappe (48) en fonction du temps de séjour du matériau humide dans ladite chambre de malaxage (42).Installation according to claim 13, comprising means for controlling the opening of said trap (48) as a function of the residence time of the moist material in said mixing chamber (42). Utilisation de l'installation selon l'une quelconque des revendications précédentes, pour la préparation de béton ou de mortier.Use of the installation according to any one of the preceding claims, for the preparation of concrete or mortar.
EP08158278.5A 2007-06-13 2008-06-13 Installation for preparing a moist material such as concrete or mortar and its use Active EP2014430B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0755740A FR2917324B1 (en) 2007-06-13 2007-06-13 INSTALLATION FOR PREPARING A WET MATERIAL OF CONCRETE OR MORTAR TYPE

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EP2014430A1 true EP2014430A1 (en) 2009-01-14
EP2014430B1 EP2014430B1 (en) 2015-10-07

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUD20110170A1 (en) * 2011-10-24 2013-04-25 Zia EQUIPMENT FOR THE PRODUCTION OF A CEMENTITIOUS AGGLOMERATE, AND ITS PROCEDURE
CN108240936A (en) * 2017-12-07 2018-07-03 孙江花 A kind of food inspection reagent oscillating uniform device

Citations (3)

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Publication number Priority date Publication date Assignee Title
FR529108A (en) * 1919-12-22 1921-11-23 Edgar Rouse Sutcliffe Improvements in apparatus intended for the hydration of lime or for similar purposes
FR2832349A1 (en) 2001-11-20 2003-05-23 Lafarge Mortiers Sa Machine for preparing and conveying mortar has hanger to suspend mortar bags for emptying into storage funnel for feed to mixing and dying station
EP1527811A1 (en) 2003-10-30 2005-05-04 WAM S.p.A. An improved mixing and transporting device for powders and powder-liquid mixtures

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Publication number Priority date Publication date Assignee Title
ATE20321T1 (en) * 1980-10-31 1986-06-15 Mathis Systemtechnik Gmbh METHOD AND DEVICE FOR CONTINUOUS MATCHING OF MORTAR, PLASTER OR THE LIKE. BUILDING SUBSTANCE OR MATERIAL.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR529108A (en) * 1919-12-22 1921-11-23 Edgar Rouse Sutcliffe Improvements in apparatus intended for the hydration of lime or for similar purposes
FR2832349A1 (en) 2001-11-20 2003-05-23 Lafarge Mortiers Sa Machine for preparing and conveying mortar has hanger to suspend mortar bags for emptying into storage funnel for feed to mixing and dying station
EP1527811A1 (en) 2003-10-30 2005-05-04 WAM S.p.A. An improved mixing and transporting device for powders and powder-liquid mixtures

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUD20110170A1 (en) * 2011-10-24 2013-04-25 Zia EQUIPMENT FOR THE PRODUCTION OF A CEMENTITIOUS AGGLOMERATE, AND ITS PROCEDURE
CN108240936A (en) * 2017-12-07 2018-07-03 孙江花 A kind of food inspection reagent oscillating uniform device
CN108240936B (en) * 2017-12-07 2020-06-19 临沂信邦生物科技有限公司 Food detects shakes even device with reagent

Also Published As

Publication number Publication date
FR2917324A1 (en) 2008-12-19
FR2917324B1 (en) 2012-09-28
EP2014430B1 (en) 2015-10-07

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