EP0588737A1 - Device for securing the continuous feeding of a spraying nozzle with a homogeneous mixture of dry or wet particulate materials - Google Patents

Device for securing the continuous feeding of a spraying nozzle with a homogeneous mixture of dry or wet particulate materials Download PDF

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Publication number
EP0588737A1
EP0588737A1 EP93420371A EP93420371A EP0588737A1 EP 0588737 A1 EP0588737 A1 EP 0588737A1 EP 93420371 A EP93420371 A EP 93420371A EP 93420371 A EP93420371 A EP 93420371A EP 0588737 A1 EP0588737 A1 EP 0588737A1
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EP
European Patent Office
Prior art keywords
tube
conduit
hopper
product
feed hopper
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Granted
Application number
EP93420371A
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German (de)
French (fr)
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EP0588737B1 (en
Inventor
Pierre Bretonniere
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LANCY
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LANCY
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/30—Producing shaped prefabricated articles from the material by applying the material on to a core or other moulding surface to form a layer thereon
    • B28B1/32—Producing shaped prefabricated articles from the material by applying the material on to a core or other moulding surface to form a layer thereon by projecting, e.g. spraying
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F21/00—Implements for finishing work on buildings
    • E04F21/02—Implements for finishing work on buildings for applying plasticised masses to surfaces, e.g. plastering walls
    • E04F21/06—Implements for applying plaster, insulating material, or the like
    • E04F21/08—Mechanical implements

Definitions

  • the present invention relates to an improved device for ensuring the continuous supply of a spray assembly (or lance) of a mixture of particulate matter, dry or wet, such as in particular the spraying of concrete.
  • the projection of the concrete is always carried out by transporting in a pipe a mixture of cement and aggregates and by spraying them on a wall using compressed air.
  • the material mixture is therefore dry, except for the humidity of the sand, during its transport in the supply pipe.
  • compressed air In dry spraying, compressed air is always introduced inside the machine where the material mixture is produced, which is therefore transported at high speed in a stream of air.
  • the present invention relates more particularly to an improvement made to installations implementing the technique known as “dry process”, and it will be described for this application, but it could also be implemented for projection techniques known as “wet route”. diluted flow ".
  • the mixture of cement, gravel or sand (not added with water), kneaded in the traditional way but "dry", is introduced into a machine designated by the general reference (1), the role of which is to propel it with a controlled and regular flow in the transport pipe (2).
  • the compressed air circulating at high speed in the pipe acts as a vehicle; it coats, drives and accompanies all the elements of the mixture up to the lance (3).
  • Rotor machines are technologically simpler, but have the disadvantage of being subjected to abrasion phenomena resulting in rapid wear of the elementary parts.
  • the invention is not limited to such an embodiment and it could be envisaged to have a mobile assembly in the form of an endless chain comprising for example three protuberances making it possible to crush the conduit. according to a determined frequency.
  • the invention therefore relates to the assembly designated by the general reference (6) and which serves to ensure continuous feeding, from a feed hopper ( 4) a spray lance arranged at the end of a transport duct (2).
  • an assembly (6) consists essentially of a flexible connection conduit (9) (rubber hose in particular), connected by its ends (10) and (11) to the base of the hopper (4 ) and at the inlet (13) of the transport tube.
  • the air intake inside the transport pipe (2) is carried out by means of an inlet (12) arranged immediately in the connection area between the flexible pipe (9) and the transport pipe. (12). This air supply line is permanently supplied.
  • the flexible connection conduit (9) which connects the outlet of the feed hopper (4) to the inlet of the actual transportation conduit (2) has two straight portions (15,16) forming an angle between them. 90 ° and connected together by a curved zone (17). This conduit bears against a fixed surface or support (18).
  • a second air inlet (25) which can be fed intermittently, is provided in the right portion (15) connected to the feed hopper (4).
  • a rotor or plate (19) mounted on an axis allowing it to rotate, is arranged opposite the fixed bearing surface (15), so that its periphery comes to tangent with the free surface of the transfer line (9).
  • This rotor plate (19) has on the surface two protrusions (20,21) constituted for example by two rollers and which are arranged diametrically opposite. These protrusions (20, 21) make it possible to crush the transfer tube (9) in a sealed manner, so that the air contained in said tube is expelled towards the front and creates a suction at the rear, allowing product to enter the tube.
  • the assembly according to the invention also comprises a compression element (22) disposed immediately downstream of the feed hopper (4) and allowing, when the plate (19) rotates, and when we release crushing of the tube (9), to avoid backflow towards the hopper when the compressed air drives the product towards the arrival of the transport air (12).
  • the variation in flow rate is obtained by simple variation of the speed of rotation of the disc or rotor (19) and adjustment of the conventional feed hatch (23) that the hopper (4) comprises.
  • FIGS 3 to 10 illustrate a complete cycle.
  • the air supply at (12) is, as said above, permanent, and in addition, the tube at the start of the hopper side cycle (4) is open.
  • the protuberance or roller (20) expels the air in front of it, creating a vacuum in the tube (9) at the rear. As a result, the product falls into the tube by suction and gravity.
  • Such a particularly simple projection assembly not only makes it possible to obtain a continuous supply, but also eliminates the risks of wear and prevents any formation of dust by the impossibility of leaks and the absence of decompression.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Nozzles (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)

Abstract

This device (6) is placed beneath the feed hopper (4) of a spraying installation and serves to feed the gun. It includes: - a flexible connecting conduit (hose) (9) which bears against a fixed surface and connects the outlet of the hopper (4) to the inlet of the conduit (2) bringing the mixture to the gun; - a movable assembly which is moved in the direction of discharge of the product and is fitted with protuberances (20, 21) squashing (compressing) the tube (9) in a sealed manner, so that the air contained in the said tube (9) is forced out via the front and creates a suction action at the rear; - a compression element (22) which is placed downstream of the feed hopper (4) and makes it possible, when the movable assembly moves and releases the squashing of the tube (9), to prevent back-flow towards the hopper (4). <IMAGE>

Description

La présente invention concerne un dispositif perfectionné permettant d'assurer l'alimentation continue d'un ensemble de projection (ou lance) d'un mélange de matières particulaires, sèches ou humides, telles que notamment la projection de béton.The present invention relates to an improved device for ensuring the continuous supply of a spray assembly (or lance) of a mixture of particulate matter, dry or wet, such as in particular the spraying of concrete.

Dans la suite de la description, l'invention sera décrite pour une telle application (projection de béton), mais il est évident que cela n'est pas limitatif et que l'invention pourrait être utilisée dans tous les domaines où se posent des problèmes similaires.In the following description, the invention will be described for such an application (concrete spraying), but it is obvious that this is not limiting and that the invention could be used in all areas where problems arise. similar.

Diverses techniques sont utilisées à ce jour pour réaliser la projection de béton. D'une manière générale, ces techniques se divisent en deux familles, à savoir la technique dite par "voie sèche" et celle dite par "voie mouillée".Various techniques are used to date for spraying concrete. In general, these techniques are divided into two families, namely the technique known as "dry" and that called "wet".

Dans tous les cas, la projection du béton est toujours réalisée en transportant dans un tuyau un mélange de ciment et de granulats et en les projetant sur une paroi à l'aide d'air comprimé.In all cases, the projection of the concrete is always carried out by transporting in a pipe a mixture of cement and aggregates and by spraying them on a wall using compressed air.

La distinction entre les grandes techniques de projection utilisées est déterminée par la position du point d'introduction de l'eau dans la suite d'opérations : malaxage → transport → projection.The distinction between the main projection techniques used is determined by the position of the point of introduction of the water in the sequence of operations: mixing → transport → projection.

Dans la technique dite "projection par voie sèche", le mélange de matériau est donc sec, à l'humidité du sable près, pendant son transport dans le tuyau d'alimentation.In the so-called "dry spraying" technique, the material mixture is therefore dry, except for the humidity of the sand, during its transport in the supply pipe.

Dans l'autre technique dite "de projection", l'eau est ajoutée au mélange au moment du malaxage. Le béton, normalement gâché comme s'il était destiné à être coulé, est ensuite introduit dans la machine chargée de le propulser dans le tuyau.In the other technique called "spraying", water is added to the mixture at the time of mixing. The concrete, normally mixed as if it were intended to be poured, is then introduced into the machine responsible for propelling it into the pipe.

Pendant le trajet machine-lance, le mélange est donc mouillé et, pour cette raison, cette technique est désignée par l'expression "projection par voie mouillée".During the machine-lance journey, the mixture is therefore wetted and, for this reason, this technique is designated by the expression "wet projection".

Pour réaliser la projection du mélange, les deux techniques font appel à l'air comprimé. Dans la projection par voie sèche, l'air comprimé est toujours introduit à l'intérieur de la machine où est réalisé le mélange de matériau qui est donc transporté à grande vitesse dans un flot d'air.To achieve the projection of the mixture, the two techniques use compressed air. In dry spraying, compressed air is always introduced inside the machine where the material mixture is produced, which is therefore transported at high speed in a stream of air.

Dans la technique "voie mouillée", outre la solution selon laquelle l'air comprimé est introduit exclusivement au niveau de la lance, on utilise également une technique similaire à celle dite par voie sèche selon laquelle l'air comprimé est introduit à l'intérieur de la machine où est réalisé le mélange. L'air comprimé se détendant, il propulse, en l'accompagnant, le mélange mouillé dans la conduite d'alimentation de la lance. Dans cette méthode, une addition d'air comprimé peut également être faite à la lance pour augmenter la force de projection.In the "wet" technique, in addition to the solution according to which the compressed air is introduced exclusively at the level of the lance, a technique similar to that known as the dry method according to which the compressed air is introduced inside is also used. of the machine where the mixing is carried out. As the compressed air relaxes, it propels the accompanying wet mixture into the lance's supply line. In this method, an addition of compressed air can also be made to the lance to increase the force of projection.

D'autres solutions tel que cela ressort notamment du brevet GB-A-2 249 591 et du DE-A-2 138 113, ont également été proposés pour assurer la distribution de produits pompables ou mouillés en faisant appel à un phénomène de poussée mécanique, mais en aucun cas, les solutions proposées dans ces documents ne peuvent être appliquées pour assurer la distribution de produits secs.Other solutions as shown in particular from GB-A-2 249 591 and DE-A-2 138 113, have also been proposed to ensure the distribution of pumpable or wet products by using a mechanical thrust phenomenon , but in no case can the solutions proposed in these documents be applied to ensure the distribution of dry products.

La présente invention vise plus particulièrement un perfectionnement apporté aux installations mettant en oeuvre la technique dite par "voie sèche", et elle sera décrite pour cette application, mais elle pourrait également être mise en oeuvre pour les techniques de projection dites par "voie mouillée à flux dilué".The present invention relates more particularly to an improvement made to installations implementing the technique known as "dry process", and it will be described for this application, but it could also be implemented for projection techniques known as "wet route". diluted flow ".

Comme cela ressort de la figure 1 annexée, dans la technique de projection par voie sèche, le mélange de ciment, de gravillons ou de sable (non additionnés d'eau), malaxé de manière traditionnelle mais à "sec", est introduit dans une machine désignée par la référence générale (1), dont le rôle est de le propulser avec un débit contrôlé et régulier dans la conduite de transport (2). L'air comprimé circulant à grande vitesse dans la conduite, joue le rôle de véhicule ; il enrobe, entraîne et accompagne tous les éléments du mélange jusqu'à la lance (3).As can be seen from the appended FIG. 1, in the dry spraying technique, the mixture of cement, gravel or sand (not added with water), kneaded in the traditional way but "dry", is introduced into a machine designated by the general reference (1), the role of which is to propel it with a controlled and regular flow in the transport pipe (2). The compressed air circulating at high speed in the pipe acts as a vehicle; it coats, drives and accompanies all the elements of the mixture up to the lance (3).

D'une manière générale, les machines (1) utilisées en voie sèche comprennent :

  • une trémie de chargement (4) ;
  • une arrivé d'air comprimé (5) ;
  • un dispositif (6) destiné à assurer un fonctionnement continu (sas ou barillet) et comportant un système de réglage du débit de sortie du mélange (roue à poches, vis sans fin, barillet) ;
  • un moteur (7) actionnant le système de réglage du débit (qui est en même temps le dispositif de fonctionnement continu pour les machines à rotor) ;
  • une buse (8) de sortie raccordée à la conduite de transport.
In general, the machines (1) used in the dry process include:
  • a loading hopper (4);
  • a compressed air supply (5);
  • a device (6) intended to ensure continuous operation (airlock or barrel) and comprising a system for adjusting the output flow of the mixture (pocket wheel, worm, barrel);
  • a motor (7) actuating the flow control system (which is at the same time the continuous operating device for rotor machines);
  • an outlet nozzle (8) connected to the transport pipe.

Toutes les machines (6) d'alimentation du mélange de matière utilisées à ce jour, présentent un certain nombre d'inconvénients.All the machines (6) for feeding the mixture of materials used to date have a certain number of drawbacks.

Dans les machines à sas qui sont essentiellement constituées de deux chambres superposées, le débit est limité et le nettoyage difficile à réaliser. De plus, de telles machines sont d'une grande complexité et nécessitent du personnel très qualifié.In airlock machines which essentially consist of two superimposed chambers, the flow is limited and cleaning difficult to carry out. In addition, such machines are very complex and require highly qualified personnel.

Les machines à rotor sont technologiquement plus simples, mais présentent l'inconvénient d'être soumises à des phénomènes d'abrasion entraînant une usure rapide des pièces élémentaires.Rotor machines are technologically simpler, but have the disadvantage of being subjected to abrasion phenomena resulting in rapid wear of the elementary parts.

Par ailleurs, dans toutes les solutions proposées à ce jour, lors du remplissage, il faut créer une décompression entraînant un échappement d'air.Furthermore, in all the solutions proposed to date, during filling, it is necessary to create a decompression causing an air exhaust.

Or on a trouvé, et c'est ce qui fait l'objet de la présente invention, un dispositif de conception simple qui permet de résoudre ces problèmes.However, we have found, and this is what is the subject of the present invention, a device of simple design which makes it possible to solve these problems.

D'une manière générale, l'invention concerne donc un dispositif permettant d'assurer le transport pneumatique et l'alimentation en continu d'un ensemble de projection de béton (ou matériau similaire), destiné à être disposé en dessous de la trémie d'alimentation d'une installation de projection et servant à alimenter la lance proprement dite, ledit dispositif comprenant :

  • un conduit de raccordement souple reliant la sortie de la trémie d'alimentation à l'entrée du conduit de transport proprement dit amenant le mélange à la lance de projection, ledit conduit prenant appui contre une surface fixe ;
  • un ensemble mobile déplacé dans la direction où l'on souhaite évacuer le produit et qui est muni de protubérances (rouleaux, galets..) destinées à venir écraser le tube de façon étanche ;

caractérisé en ce que :
  • l'ensemble mobile a une structure telle que l'air contenu dans ledit tube soit chassé par l'avant et crée une aspiration à l'arrière permettant au produit d'entrer dans ledit tube ;
  • un élément de compression, disposé en aval de la trémie d'alimentation et permettant, lorsque l'ensemble mobile se déplace et libère l'écrasement du tube, d'éviter le refoulement vers la trémie lorsque l'air comprimé chasse le produit vers l'arrivée d'air de transport et de réguler l'alimentation dudit produit à l'intérieur du conduit.
In general, the invention therefore relates to a device making it possible to ensure pneumatic transport and continuous feeding of a spraying assembly of concrete (or similar material), intended to be placed below the hopper of supply to a projection installation and serving to supply the lance itself, said device comprising:
  • a flexible connection conduit connecting the outlet of the feed hopper to the inlet of the actual transportation conduit bringing the mixture to the spray lance, said conduit bearing against a fixed surface;
  • a movable assembly moved in the direction where it is desired to evacuate the product and which is provided with protrusions (rollers, rollers, etc.) intended to crush the tube in a leaktight manner;

characterized in that:
  • the mobile assembly has a structure such that the air contained in said tube is expelled from the front and creates a suction at the rear allowing the product to enter said tube;
  • a compression element, arranged downstream of the feed hopper and making it possible, when the movable assembly moves and releases the crushing of the tube, to prevent backflow towards the hopper when the compressed air drives the product towards the transport air supply and regulate the supply of said product inside the duct.

Selon une forme de réalisation préférentielle conforme à l'invention :

  • le conduit de raccordement souple reliant la sortie de la trémie d'alimentation à l'entrée du conduit de transport proprement dit amenant le mélange à la lance de projection, comporte deux extrémités droites formant un angle de 90° et reliées entre elles par une zone courbe ;
  • l'ensemble mobile est constitué par un rotor ou plateau, entraîné en rotation, et qui est muni de deux protubérances (ou rouleaux) d'écrasement diamétralement opposés.
According to a preferred embodiment according to the invention:
  • the flexible connection conduit connecting the outlet of the feed hopper to the inlet of the actual transportation conduit bringing the mixture to the spray lance, has two straight ends forming an angle of 90 ° and interconnected by a zone curve;
  • the mobile assembly is constituted by a rotor or plate, driven in rotation, and which is provided with two diametrically opposed protrusions (or rollers).

Bien entendu, l'invention n'est pas limitée à une telle forme de réalisation et il pourrait être envisagé d'avoir un ensemble mobile se présentant sous la forme d'une chaîne sans fin comportant par exemple trois protubérances permettant de venir écraser le conduit selon une fréquence déterminée.Of course, the invention is not limited to such an embodiment and it could be envisaged to have a mobile assembly in the form of an endless chain comprising for example three protuberances making it possible to crush the conduit. according to a determined frequency.

L'invention et les avantages qu'elle apporte seront cependant mieux compris grâce à l'exemple de réalisation donné ci-après à titre indicatif mais non limitatif, et qui est illustré par les figures annexées dans lesquelles :

  • la figure 1 illustre, comme vu précédemment, la structure générale d'une installation de projection de ciment ;
  • la figure 2 illustre de manière schématique, vue de côté, l'ensemble d'un dispositif d'alimentation conforme à l'invention ;
  • les figures 3 à 10 illustrent le cycle de fonctionnement d'un dispositif d'alimentation réalisé conformément à l'invention.
The invention and the advantages which it brings will however be better understood thanks to the embodiment given below by way of indication but not limitation, and which is illustrated by the appended figures in which:
  • Figure 1 illustrates, as seen above, the general structure of a cement spraying installation;
  • FIG. 2 schematically illustrates, seen from the side, the assembly of a supply device according to the invention;
  • Figures 3 to 10 illustrate the operating cycle of a supply device produced in accordance with the invention.

Si l'on se reporte à la figure 2 annexée, l'invention porte donc sur l'ensemble désigné par la référence générale (6) et qui sert à assurer l'alimentation en continu, à partir d'une trémie d'alimentation (4) d'une lance de projection disposée à l'extrémité d'un conduit de transport (2). Conformément à l'invention, un tel ensemble (6) est constitué essentiellement par un conduit de raccordement souple (9) (tuyau en caoutchouc notamment), raccordé par ses extrémités (10) et (11) à la base de la trémie (4) et à l'entrée (13) du tube de transport. L'amenée d'air à l'intérieur de la conduite de transport (2) est réalisée par l'intermédiaire d'une arrivée (12) disposée immédiatement dans la zone de raccordement entre le conduit souple (9) et la conduite de transport (12). Cette conduite d'arrivée d'air est alimentée en permanence. Le conduit de raccordement souple (9) qui relie la sortie de la trémie d'alimentation (4) à l'entrée du conduit de transport proprement dit (2), présente deux portions droites (15,16) formant entre elles un angle de 90° et reliées entre elles par une zone courbe (17). Ce conduit prend appui contre une surface fixe ou support (18). Une seconde arrivée d'air (25) qui peut être alimentée par intermittence, est prévue dans la portion droite (15) raccordée à la trémie d'alimentation (4).If reference is made to the appended FIG. 2, the invention therefore relates to the assembly designated by the general reference (6) and which serves to ensure continuous feeding, from a feed hopper ( 4) a spray lance arranged at the end of a transport duct (2). According to the invention, such an assembly (6) consists essentially of a flexible connection conduit (9) (rubber hose in particular), connected by its ends (10) and (11) to the base of the hopper (4 ) and at the inlet (13) of the transport tube. The air intake inside the transport pipe (2) is carried out by means of an inlet (12) arranged immediately in the connection area between the flexible pipe (9) and the transport pipe. (12). This air supply line is permanently supplied. The flexible connection conduit (9) which connects the outlet of the feed hopper (4) to the inlet of the actual transportation conduit (2) has two straight portions (15,16) forming an angle between them. 90 ° and connected together by a curved zone (17). This conduit bears against a fixed surface or support (18). A second air inlet (25) which can be fed intermittently, is provided in the right portion (15) connected to the feed hopper (4).

Conformément à l'invention, un rotor ou plateau (19) monté sur un axe permettant de l'entraîner en rotation, est disposé en regard de la surface d'appui fixe (15), de telle sorte que sa périphérie vienne tangenter avec la surface libre de la conduite de transfert (9). Ce plateau rotor (19) comporte en surface deux protubérances (20,21) constituées par exemple par deux rouleaux et qui sont disposées diamétralement opposées. Ces protubérances (20,21) permettent d'écraser le tube de transfert (9) de façon étanche et ce, de telle sorte que l'air contenu dans ledit tube soit chassé vers l'avant et crée une aspiration à l'arrière, permettant au produit d'entrer dans le tube. Par ailleurs, l'ensemble conforme à l'invention comporte également un élément de compression (22) disposé immédiatement en aval de la trémie d'alimentation (4) et permettant, lorsque le plateau (19) tourne, et au moment où on libère l'écrasement du tube (9), d'éviter le refoulement vers la trémie lorsque l'air comprimé chasse le produit vers l'arrivée de l'air de transport (12).According to the invention, a rotor or plate (19) mounted on an axis allowing it to rotate, is arranged opposite the fixed bearing surface (15), so that its periphery comes to tangent with the free surface of the transfer line (9). This rotor plate (19) has on the surface two protrusions (20,21) constituted for example by two rollers and which are arranged diametrically opposite. These protrusions (20, 21) make it possible to crush the transfer tube (9) in a sealed manner, so that the air contained in said tube is expelled towards the front and creates a suction at the rear, allowing product to enter the tube. Furthermore, the assembly according to the invention also comprises a compression element (22) disposed immediately downstream of the feed hopper (4) and allowing, when the plate (19) rotates, and when we release crushing of the tube (9), to avoid backflow towards the hopper when the compressed air drives the product towards the arrival of the transport air (12).

Dans une telle installation, la variation de débit s'obtient par simple variation de la vitesse de rotation du disque ou rotor (19) et réglage de la trappe d'alimentation conventionnelle (23) que comporte la trémie (4).In such an installation, the variation in flow rate is obtained by simple variation of the speed of rotation of the disc or rotor (19) and adjustment of the conventional feed hatch (23) that the hopper (4) comprises.

Le fonctionnement d'une telle installation ressort des figures 3 à 10 qui illustrent un cycle complet. En cours de fonctionnement, l'arrivée d'air en (12) est, comme dit précédemment, permanente, et de plus, le tube au départ du cycle côté trémie (4) est ouvert.The operation of such an installation is shown in Figures 3 to 10 which illustrate a complete cycle. During operation, the air supply at (12) is, as said above, permanent, and in addition, the tube at the start of the hopper side cycle (4) is open.

Au début du cycle (figure 3), l'air provenant de l'alimentation (25) est fermé. La protubérance (ou rouleaux) (20) vient comprimer le tube (9) et assurent ainsi l'étanchéité.At the start of the cycle (Figure 3), the air from the supply (25) is closed. The protuberance (or rollers) (20) compresses the tube (9) and thus ensures sealing.

Au cours de la rotation du dique ou plateau (19) (figures 2,3 et 4), la protubérance ou rouleau (20) chasse l'air devant lui, créant le vide dans le tube (9) à l'arrière. Par suite, le produit tombe dans le tube par aspiration et gravité.During the rotation of the plate or plate (19) (Figures 2,3 and 4), the protuberance or roller (20) expels the air in front of it, creating a vacuum in the tube (9) at the rear. As a result, the product falls into the tube by suction and gravity.

La protubérance (20) arrivant dans la position représentée à la figure 7, l'ensemble (22) provoque la fermeture du tube côté trémie (4) par pincement. On stoppe donc l'approvisionnement en produit à l'intérieur du tube. L'arrivée d'air (25) s'ouvre.The protrusion (20) arriving in the position shown in Figure 7, the assembly (22) causes the closure of the hopper side tube (4) by pinching. We therefore stop the supply of product inside the tube. The air inlet (25) opens.

Le disque (19) poursuivant sa rotation, le rouleau (20) dégage la compression du tube. Le produit est donc chassé par l'air provenant de l'arrivée d'air (25) vers la conduite de transport où il est repris par l'arrivée d'air permanente (12).The disc (19) continuing to rotate, the roller (20) releases the compression of the tube. The product is therefore expelled by the air coming from the air inlet (25) to the transport line where it is taken up by the permanent air inlet (12).

Le tube se vide (figure 10) et le second rouleau (21) commence sa compression et le cycle recommence.The tube empties (Figure 10) and the second roller (21) begins to compress and the cycle begins again.

Un tel ensemble de projection particulièrement simple, permet non seulement d'obtenir une alimentation en continu, mais également élimine les risques d'usure et évite toute formation de poussière par l'impossibilité de fuites et l'absence de décompression.Such a particularly simple projection assembly not only makes it possible to obtain a continuous supply, but also eliminates the risks of wear and prevents any formation of dust by the impossibility of leaks and the absence of decompression.

Claims (3)

1/ Dispositif (6) permettant permettant d'assurer le transport pneumatique et l'alimentation en continu d'un ensemble de projection de béton (ou matériau similaire), destiné à être disposé en dessous de la trémie d'alimentation (4) d'une installation de projection et servant à alimenter la lance proprement dite, ledit dispositif comprenant : - un conduit de raccordement souple (9) reliant la sortie de la trémie d'alimentation (4) à l'entrée du conduit de transport (2) proprement dit amenant le mélange à la lance de projection, ledit conduit prenant appui contre une surface fixe (18) ; - un ensemble mobile (19) déplacé dans la direction où l'on souhaite évacuer le produit et qui est muni de protubérances (rouleaux, galets..) (20,21) destinées à venir écraser le tube (9) de façon étanche, caractérisé en ce que : - l'ensemble mobile (19) a une structure telle que l'air contenu dans ledit tube (9) soit chassé par l'avant et crée une aspiration à l'arrière permettant au produit d'entrer dans ledit tube (9) ; - un élément de compression (22), disposé en aval de la trémie d'alimentation (4) permet, lorsque l'ensemble mobile se déplace et libère l'écrasement du tube (9), d'éviter le refoulement vers la trémie (4) lorsque l'air comprimé chasse le produit vers l'arrivée d'air de transport et de réguler l'alimentation dudit produit à l'intérieur du conduit. 1 / Device (6) making it possible to ensure pneumatic transport and continuous feeding of a spraying assembly of concrete (or similar material), intended to be placed below the feed hopper (4) d a projection installation and serving to supply the lance itself, said device comprising: - a flexible connection conduit (9) connecting the outlet of the feed hopper (4) to the inlet of the conveying conduit (2) proper bringing the mixture to the spray lance, said conduit bearing against a surface fixed (18); - a mobile assembly (19) moved in the direction where it is desired to evacuate the product and which is provided with protuberances (rollers, rollers, etc.) (20, 21) intended to crush the tube (9) in a leaktight manner, characterized in that: - The mobile assembly (19) has a structure such that the air contained in said tube (9) is expelled from the front and creates a suction at the rear allowing the product to enter said tube (9); - a compression element (22), arranged downstream of the feed hopper (4) makes it possible, when the mobile assembly moves and releases the crushing of the tube (9), to prevent backflow towards the hopper ( 4) when the compressed air drives the product towards the transport air inlet and regulate the supply of said product inside the duct. 2/ Dispositif selon la revendication 1, caractérisé en ce que : - le conduit de raccordement souple (9) comporte deux extrémités droites (15,16) formant un angle de 90° et reliées entre elles par une zone courbe (17) ; - l'ensemble mobile est constitué par un rotor ou plateau (19) entraîné en rotation et muni de deux protubérances ou rouleaux (20,21) d'écrasement diamétralement opposés. 2 / Device according to claim 1, characterized in that: - the flexible connection conduit (9) has two straight ends (15,16) forming an angle of 90 ° and connected together by a curved zone (17); - The mobile assembly is constituted by a rotor or plate (19) driven in rotation and provided with two protrusions or rollers (20,21) of diametrically opposite crushing. 3/ Dispositif selon la revendication 1, caractérisé en ce que le conduit de raccordement souple (9) est rectiligne et que l'ensemble mobile est constitué par une chaine sans fin munie de protubérances d'écrasement sur sa longueur. 3 / Device according to claim 1, characterized in that the flexible connection conduit (9) is rectilinear and that the movable assembly is constituted by an endless chain provided with crushing protrusions along its length.
EP93420371A 1992-09-18 1993-09-17 Device for securing the continuous feeding of a spraying nozzle with a homogeneous mixture of dry or wet particulate materials Expired - Lifetime EP0588737B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9211355 1992-09-18
FR9211355A FR2695858B1 (en) 1992-09-18 1992-09-18 Device for ensuring the continuous supply of a spray lance with a homogeneous mixture of dry or wet "particulate" materials.

Publications (2)

Publication Number Publication Date
EP0588737A1 true EP0588737A1 (en) 1994-03-23
EP0588737B1 EP0588737B1 (en) 1997-04-23

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EP93420371A Expired - Lifetime EP0588737B1 (en) 1992-09-18 1993-09-17 Device for securing the continuous feeding of a spraying nozzle with a homogeneous mixture of dry or wet particulate materials

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EP (1) EP0588737B1 (en)
AT (1) ATE152032T1 (en)
DE (1) DE69310067T2 (en)
ES (1) ES2101277T3 (en)
FR (1) FR2695858B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999028221A1 (en) 1997-12-02 1999-06-10 Lucien Vidal Device for pneumatic transport of material such as concrete
CN102872758A (en) * 2012-10-19 2013-01-16 宁波东来化工有限公司 Material charging hopper
CN104324666A (en) * 2014-09-30 2015-02-04 宁波保润石化有限公司 Ester powder conveying apparatus of esterification kettle

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106219246B (en) * 2016-09-22 2018-05-01 付建华 A kind of cement mortar transport machine

Citations (7)

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Publication number Priority date Publication date Assignee Title
DE861916C (en) * 1950-11-23 1953-01-08 Oskar Dr-Ing Posch Device for the mechanical preparation, conveying and processing of mortar for plastering walls and ceilings
US3217069A (en) * 1961-03-08 1965-11-09 Brixite Ltd Method of moulding cement articles
US3311065A (en) * 1964-10-15 1967-03-28 Plastering Dev Ct Inc Pumping apparatus
DE2138113A1 (en) * 1971-07-30 1973-02-08 Schaubstahl Werke EQUIPMENT FOR THE PROCESSING OF MORTAL DIMENSIONS
DE2143172B1 (en) * 1971-08-28 1973-02-15 Beton-Spritz-Maschinen Gmbh & Co, 6000 Frankfurt Spraying machine for concrete, mortar or similar goods
FR2567498A1 (en) * 1984-07-16 1986-01-17 Costes Jean Method and devices permitting transfer of dry powders towards a liquid medium, overcoming the problems posed by dust and the formation of crusts
GB2249591A (en) * 1990-10-01 1992-05-13 Pressure Pointing Ltd Mortar dispensing apparatus

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Publication number Priority date Publication date Assignee Title
DE861916C (en) * 1950-11-23 1953-01-08 Oskar Dr-Ing Posch Device for the mechanical preparation, conveying and processing of mortar for plastering walls and ceilings
US3217069A (en) * 1961-03-08 1965-11-09 Brixite Ltd Method of moulding cement articles
US3311065A (en) * 1964-10-15 1967-03-28 Plastering Dev Ct Inc Pumping apparatus
DE2138113A1 (en) * 1971-07-30 1973-02-08 Schaubstahl Werke EQUIPMENT FOR THE PROCESSING OF MORTAL DIMENSIONS
DE2143172B1 (en) * 1971-08-28 1973-02-15 Beton-Spritz-Maschinen Gmbh & Co, 6000 Frankfurt Spraying machine for concrete, mortar or similar goods
FR2567498A1 (en) * 1984-07-16 1986-01-17 Costes Jean Method and devices permitting transfer of dry powders towards a liquid medium, overcoming the problems posed by dust and the formation of crusts
GB2249591A (en) * 1990-10-01 1992-05-13 Pressure Pointing Ltd Mortar dispensing apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"DESCRIPTIONS OF MOBILE CONCRETE PUMPS", CONCRETE, vol. 2, no. 9, September 1968 (1968-09-01), LONDON , GB, pages 383 - 386 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999028221A1 (en) 1997-12-02 1999-06-10 Lucien Vidal Device for pneumatic transport of material such as concrete
CN102872758A (en) * 2012-10-19 2013-01-16 宁波东来化工有限公司 Material charging hopper
CN102872758B (en) * 2012-10-19 2015-08-19 宁波东来化工有限公司 A kind of cast hopper
CN104324666A (en) * 2014-09-30 2015-02-04 宁波保润石化有限公司 Ester powder conveying apparatus of esterification kettle

Also Published As

Publication number Publication date
ES2101277T3 (en) 1997-07-01
ATE152032T1 (en) 1997-05-15
DE69310067T2 (en) 1997-07-31
DE69310067D1 (en) 1997-05-28
FR2695858B1 (en) 1994-11-25
EP0588737B1 (en) 1997-04-23
FR2695858A1 (en) 1994-03-25

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