EP1707687A2 - Suction mouth for a trench excavating machine. - Google Patents

Suction mouth for a trench excavating machine. Download PDF

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Publication number
EP1707687A2
EP1707687A2 EP06111158A EP06111158A EP1707687A2 EP 1707687 A2 EP1707687 A2 EP 1707687A2 EP 06111158 A EP06111158 A EP 06111158A EP 06111158 A EP06111158 A EP 06111158A EP 1707687 A2 EP1707687 A2 EP 1707687A2
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EP
European Patent Office
Prior art keywords
suction mouth
opening
axes
rotation
suction
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.)
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Application number
EP06111158A
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German (de)
French (fr)
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EP1707687A3 (en
Inventor
Fabrice Mathieu
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Compagnie du Sol SARL
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Compagnie du Sol SARL
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Publication date
Application filed by Compagnie du Sol SARL filed Critical Compagnie du Sol SARL
Publication of EP1707687A2 publication Critical patent/EP1707687A2/en
Publication of EP1707687A3 publication Critical patent/EP1707687A3/en
Withdrawn legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/18—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels
    • E02F3/20—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels with tools that only loosen the material, i.e. mill-type wheels
    • E02F3/205—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels with tools that only loosen the material, i.e. mill-type wheels with a pair of digging wheels, e.g. slotting machines
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
    • E02F3/92—Digging elements, e.g. suction heads
    • E02F3/9212—Mechanical digging means, e.g. suction wheels, i.e. wheel with a suction inlet attached behind the wheel

Definitions

  • the present invention relates to a suction mouth for trenching machine and a trench excavation machine equipped with said mouth.
  • FIG. 1 there is shown an excavation assembly which comprises a support frame 10 provided with an articulated boom 12. On the end 14 of the boom 12, pass levitation cables 16 at the end 18 of which is mounted the excavating machine 20 itself.
  • This machine 20 comprises a vertical frame 22 at the lower end of which is mounted a cutting head 24.
  • the cutting head 24 is essentially constituted by two rotary cutting assemblies 26 and 28 with horizontal axes of rotation parallel to each other.
  • each rotary cutting assembly is constituted by two mills or drums mounted symmetrically on the frame.
  • the excavation machine also comprises, to allow the removal of the cuttings, a suction mouth 30 disposed at the lower end of the frame 22 between the two rotary cutting assemblies 26 and 28, a suction pipe 32 connecting the mouth suction device 30 to a suction pump 34 and a flexible duct 36 which enables the cuttings to be transferred to a recovery installation.
  • the suction mouth 30 has cheeks tangent to the trajectories Circular tools mounted on the cutting drums 26 and 28.
  • the suction is through the generally circular holes in the cheeks of the suction mouth.
  • a first object of the invention is to provide a suction mouth for excavating machine of the type mentioned above which improves the recovery of cuttings and sediments caused by the action of cutting tools.
  • the suction mouth for a trench excavation machine working in a drilling liquid comprises a frame on which are mounted two sets, rotary cutting parallel axes, said mouth being intended for be mounted at the lower end of the frame between the two rotary cutting assemblies, said mouth being characterized in that it comprises an outer wall defining an internal volume, an upper opening connectable to a suction pipe and at least one opening lower symmetrical with respect to the first vertical median plane of the frame parallel to the axes of rotation, and extending in the direction of said axes of rotation, whereby said opening is substantially orthogonal to the flow of the drilling liquid driven by the rotation of said sets cutting.
  • the opening or the openings of the suction mouth are arranged at the lower end thereof and admit as a plane of symmetry the plane of symmetry of the two rotary cutting assemblies, this opening or these openings are disposed substantially orthogonally to the flow of the drilling liquid driven by the rotation of the cutting assemblies. This gives a greater efficiency of the suction mouth.
  • the suction mouth further comprises, in the internal volume, a bulb-shaped piece symmetrical with respect to a second median plane orthogonal to the first and profiled in such a manner that in section through said second median plane, the two passages defined by said profiled piece and said outer wall have a section at most constant remaining away from said lower opening.
  • Another object of the invention is to provide an excavation machine of the type with two rotary cutting assemblies using a suction mouth of the type defined above.
  • the suction mouth 40 that will be described is intended to replace the suction mouth 30 shown in Figures 1 and 2.
  • This suction mouth 30 is intended to be fixed on the lower part of the frame 22 of the excavating machine 20 to be connected to the suction pipe 32.
  • the suction mouth forms a separate part of the suction pipe.
  • a first center plane of the machine frame PP ' is defined which is parallel to the axes of rotation XX' of the cutting assemblies 26 and 28 and a second median plane QQ 'which is orthogonal to it.
  • the suction mouth has a dimension which is much greater than the diameter of the suction pipe. Typically, this length is at least four times the diameter of the pipe.
  • the suction mouth 40 consists essentially of an outer wall 42 comprising two main faces 44 and 46 extending substantially parallel to the median plane PP 'and two end faces 48 and 50 extending substantially parallel to the median plane QQ' .
  • the upper face 52 of the outer wall 42 defines an axial orifice 54 which is arranged in a flange 56 for fixing the suction mouth on the lower part of the frame 22 of the machine.
  • the outer wall 42 of the suction mouth defines an internal volume 57 in which opens at its upper part the orifice 54.
  • the lower edge 44a, 46a of the main faces 44 and 46 of the outer wall defines a lower suction opening 58.
  • the edges 44a and 46a are substantially arranged in the same plane orthogonal to the two planes PP 'and QQ'.
  • This opening 58 is arranged symmetrically with respect to the median plane PP '.
  • the opening 58 extends substantially the entire length of the suction mouth.
  • a bulbous piece 60 which extends parallel to the axes of rotation of the cutting assemblies and which is symmetrical with respect to the median plane PP '.
  • This internal part 60 defines with the two main faces 44 and 46 of the suction mouth two internal lateral passages 62 and 64 which thus connect the lower suction opening 58 and the outlet orifice 54.
  • the main faces 44 and 46 are curved in such a way that the passages 62 and 64 have a section at most constant when going from the lower opening 58 to the upper orifice 54. In other words, this section of passage is substantially constant or decreasing.
  • the passages 62 and 64 do not have a singularity and in particular no abrupt change of cut.
  • the suction mouth also has a grid member 70 which is attached to the lower opening 58 of the suction mouth.
  • This grid member consists essentially of bars 72, 74, 76 on which are fixed V-shaped round bars such as 80. End plates 82, 84 serve to fix the piece 70 on the outer wall of the suction mouth.
  • This grid-shaped piece serves to prevent the suction of cuttings or too bulky items through the suction mouth that could close the suction lines or even the suction pump.
  • FIG 6 there is shown the operating principle of the suction mouth according to the invention.
  • the two rotary cutting assemblies 26, 28 and the arrows F the flow lines of the drilling fluid driven by the rotation of the rotating assemblies 26 and 28. Due to the position of the opening lower 58 of the suction mouth 40, which is substantially orthogonal to the flow lines, we see that this opening intercepts most of the flow of the drilling fluid and thus recovers most of the sediment and cuttings driven by the circulation of this liquid.

Abstract

The port has an outer wall (42) defining an internal volume (57), and an upper orifice (54) connectable to a suction line. A lower suction opening (58) is symmetrical with respect to a vertical median plane of a chassis of a trench excavating machine frame parallel to the rotational axes of two rotating cutting assemblies. The opening (58) extends along the direction of the axes and is orthogonal to the flow of a drilling liquid driven by the rotation of the assemblies. A grill forming unit is fixed on the opening (58).

Description

La présente invention a pour objet une bouche d'aspiration pour machine d'excavation de tranchée et une machine d'excavation de tranchée équipée de ladite bouche.The present invention relates to a suction mouth for trenching machine and a trench excavation machine equipped with said mouth.

Pour réaliser des parois moulées dans le sol, il est tout d'abord nécessaire de creuser une tranchée dont la géométrie correspond à la paroi à réaliser. Ensuite, on remplit avec un coulis ou un béton éventuellement muni d'armatures la tranchée pour obtenir ainsi la paroi moulée.To make molded walls in the ground, it is first necessary to dig a trench whose geometry corresponds to the wall to be made. Then, fill with a grout or a concrete possibly provided with reinforcements the trench to thus obtain the molded wall.

Lorsque la paroi présente une certaine profondeur et qu'elle doit être réalisée avec une grande précision de définition, on utilise le plus souvent des machines d'excavation du type hydrofraise dans lesquelles la tête de coupe est équipée de deux ensembles rotatifs munis d'outils d'excavation. Ces outils, sous l'effet d'une poussée axiale, désagrègent le terrain ou la roche en mettant en suspension dans le liquide de forage qui remplit la tranchée des quantités importantes de déblais.When the wall has a certain depth and must be made with great precision of definition, it is most often used excavation machines of the type in which the cutting head is equipped with two rotating assemblies equipped with tools excavation. These tools, under the effect of an axial thrust, disintegrate the ground or the rock by suspending in the drilling liquid that fills the trench large quantities of cuttings.

En se référant aux figures annexées 1 et 2, on va décrire un exemple de réalisation de machine d'excavation de type connu.With reference to the appended figures 1 and 2, an exemplary embodiment of an excavation machine of known type will be described.

Sur la figure 1, on a représenté un ensemble d'excavation qui comprend un châssis porteur 10 muni d'une flèche articulée 12. Sur l'extrémité 14 de la flèche 12, passent des câbles de sustentation 16 à l'extrémité 18 desquels est montée la machine d'excavation 20 proprement dite. Cette machine 20 comprend un châssis vertical 22 à l'extrémité inférieure duquel est montée une tête de coupe 24. La tête de coupe 24 est essentiellement constituée par deux ensembles rotatifs de coupe 26 et 28 à axes de rotation horizontaux parallèles entre eux. De préférence, chaque ensemble rotatif de coupe est constitué par deux fraises ou tambours montés symétriquement sur le châssis. La machine d'excavation comporte également, pour permettre la remontée des déblais, une bouche d'aspiration 30 disposée à l'extrémité inférieure du châssis 22 entre les deux ensembles rotatifs de coupe 26 et 28, une conduite d'aspiration 32 reliant la bouche d'aspiration 30 à une pompe d'aspiration 34 et un conduit flexible 36 qui permet de transférer les déblais vers une installation de récupération.In Figure 1, there is shown an excavation assembly which comprises a support frame 10 provided with an articulated boom 12. On the end 14 of the boom 12, pass levitation cables 16 at the end 18 of which is mounted the excavating machine 20 itself. This machine 20 comprises a vertical frame 22 at the lower end of which is mounted a cutting head 24. The cutting head 24 is essentially constituted by two rotary cutting assemblies 26 and 28 with horizontal axes of rotation parallel to each other. Preferably, each rotary cutting assembly is constituted by two mills or drums mounted symmetrically on the frame. The excavation machine also comprises, to allow the removal of the cuttings, a suction mouth 30 disposed at the lower end of the frame 22 between the two rotary cutting assemblies 26 and 28, a suction pipe 32 connecting the mouth suction device 30 to a suction pump 34 and a flexible duct 36 which enables the cuttings to be transferred to a recovery installation.

Dans les machines d'excavation connues, par exemple celle qui est décrite dans le brevet européen EP 730 064 au nom du demandeur, la bouche d'aspiration 30 comporte des joues tangentes aux trajectoires circulaires des outils montés sur les tambours de coupe 26 et 28. L'aspiration se fait grâce à des orifices généralement circulaires pratiqués dans les joues de la bouche d'aspiration.In known excavation machines, for example that described in the European patent EP 730 064 in the name of the applicant, the suction mouth 30 has cheeks tangent to the trajectories Circular tools mounted on the cutting drums 26 and 28. The suction is through the generally circular holes in the cheeks of the suction mouth.

Cette position des orifices d'aspiration, ainsi que la forme générale actuelle des bouches d'aspiration, font que la totalité des déblais ou sédiments générés par l'action des outils de coupe sur le terrain n'est pas intégralement évacuée.This position of the suction ports, as well as the current general shape of the suction mouths, make that all the cuttings or sediments generated by the action of the cutting tools on the ground is not entirely evacuated.

Ceci a pour conséquence une augmentation de la masse des sédiments en suspension dans le liquide de forage augmentant son abrasivité et pouvant entraîner des usures accrues des organes mécaniques de l'outillage.This results in an increase in the mass of suspended sediments in the drilling fluid increasing its abrasiveness and may lead to increased wear of the mechanical parts of the tool.

De plus, des sédiments précédemment arrachés au terrain peuvent, lorsqu'ils ne sont pas très rapidement évacués, venir s'interposer entre les outils de coupe et le terrain, gênant ainsi considérablement leur action, ce qui a pour conséquence de réduire fortement le rendement de l'excavation.In addition, sediments previously torn from the ground can, when they are not very quickly evacuated, intervene between the cutting tools and the ground, thus considerably hindering their action, which has the effect of greatly reducing the yield. excavation.

Un premier objet de l'invention est de fournir une bouche d'aspiration pour machine d'excavation du type mentionné ci-dessus qui permette d'améliorer la récupération des déblais et sédiments provoqués par l'action des outils de coupe.A first object of the invention is to provide a suction mouth for excavating machine of the type mentioned above which improves the recovery of cuttings and sediments caused by the action of cutting tools.

Pour atteindre ce but selon l'invention, la bouche d'aspiration pour une machine d'excavation de tranchée travaillant dans un liquide de forage comprend un châssis sur lequel sont montés deux ensembles, rotatifs de coupe à axes parallèles, ladite bouche étant destinée à être montée à l'extrémité inférieure du châssis entre les deux ensembles rotatifs de coupe, ladite bouche étant caractérisée en ce qu'elle comprend une paroi externe définissant un volume interne, une ouverture supérieure raccordable à une conduite d'aspiration et au moins une ouverture inférieure symétrique par rapport au premier plan médian vertical du châssis parallèle aux axes de rotation, et s'étendant selon la direction desdits axes de rotation, par quoi ladite ouverture est sensiblement orthogonale à l'écoulement du liquide de forage entraîné par la rotation desdits ensembles de coupe.To achieve this object according to the invention, the suction mouth for a trench excavation machine working in a drilling liquid comprises a frame on which are mounted two sets, rotary cutting parallel axes, said mouth being intended for be mounted at the lower end of the frame between the two rotary cutting assemblies, said mouth being characterized in that it comprises an outer wall defining an internal volume, an upper opening connectable to a suction pipe and at least one opening lower symmetrical with respect to the first vertical median plane of the frame parallel to the axes of rotation, and extending in the direction of said axes of rotation, whereby said opening is substantially orthogonal to the flow of the drilling liquid driven by the rotation of said sets cutting.

On comprend que grâce au fait que l'ouverture ou les ouvertures de la bouche d'aspiration sont disposées à l'extrémité inférieure de celle-ci et admettent comme plan de symétrie le plan de symétrie des deux ensembles rotatifs de coupe, cette ouverture ou ces ouvertures sont disposées sensiblement orthogonalement à l'écoulement du liquide de forage entraîné par la rotation des ensembles de coupe. On obtient ainsi une plus grande efficacité de la bouche d'aspiration.It is understood that because the opening or the openings of the suction mouth are arranged at the lower end thereof and admit as a plane of symmetry the plane of symmetry of the two rotary cutting assemblies, this opening or these openings are disposed substantially orthogonally to the flow of the drilling liquid driven by the rotation of the cutting assemblies. This gives a greater efficiency of the suction mouth.

De préférence, la bouche d'aspiration comprend en outre, dans le volume interne, une pièce en forme de bulbe symétrique par rapport à un deuxième plan médian orthogonal au premier et profilée de telle manière qu'en coupe par ledit deuxième plan médian, les deux passages définis par ladite pièce profilée et ladite paroi externe aient une section allant au plus en restant constante en s'éloignant de ladite ouverture inférieure.Preferably, the suction mouth further comprises, in the internal volume, a bulb-shaped piece symmetrical with respect to a second median plane orthogonal to the first and profiled in such a manner that in section through said second median plane, the two passages defined by said profiled piece and said outer wall have a section at most constant remaining away from said lower opening.

On comprend que grâce à cette forme particulière des deux passages définis dans la bouche d'aspiration par la présence de la pièce profilée en forme de bulbe, on canalise les lignes d'écoulement du liquide de forage sans imposer de changement de direction brusque, ce qui évite un "dépôt" des sédiments et déblais en suspension dans le liquide de forage. En outre, on améliore ainsi le débit de ce liquide dans la bouche d'aspiration.It is understood that by virtue of this particular shape of the two passages defined in the suction mouth by the presence of the profiled piece in the shape of a bulb, the flow lines of the drilling liquid are channeled without imposing a sudden change of direction, this which avoids a "deposit" of sediments and cuttings suspended in the drilling fluid. In addition, the flow of this liquid in the suction mouth is thus improved.

Un autre objet de l'invention est de fournir une machine d'excavation du type à deux ensembles de coupe rotatifs utilisant une bouche d'aspiration du type défini ci-dessus.Another object of the invention is to provide an excavation machine of the type with two rotary cutting assemblies using a suction mouth of the type defined above.

D'autres caractéristiques et avantages de l'invention apparaîtront mieux à la lecture de la description qui suit d'un mode préféré de réalisation de l'invention donné à titre d'exemple non limitatif. La description se réfère aux figures annexées, sur lesquelles :

  • les figures 1 et 2 déjà décrites montrent un ensemble d'excavation de type connu ;
  • la figure 3 montre en perspective une bouche d'aspiration selon l'invention ;
  • la figure 4 est une vue de la bouche d'aspiration de la figure 3 en coupe par un plan médian ;
  • la figure 5 est une vue éclatée de la bouche d'aspiration de la figure 3 ; et
  • la figure 6 est un schéma exposant le principe de fonctionnement de la bouche d'aspiration selon l'invention.
Other features and advantages of the invention will appear better on reading the following description of a preferred embodiment of the invention given by way of non-limiting example. The description refers to the appended figures, in which:
  • FIGS. 1 and 2 already described show an excavation assembly of known type;
  • Figure 3 shows in perspective a suction mouth according to the invention;
  • Figure 4 is a view of the suction mouth of Figure 3 in section through a median plane;
  • Figure 5 is an exploded view of the suction mouth of Figure 3; and
  • Figure 6 is a diagram explaining the operating principle of the suction mouth according to the invention.

La bouche d'aspiration 40 que l'on va décrire est destinée à remplacer la bouche d'aspiration 30 représentée sur les figures 1 et 2. Cette bouche d'aspiration 30 est donc destinée à être fixée sur la partie inférieure du châssis 22 de la machine d'excavation 20 pour être reliée à la conduite d'aspiration 32. la bouche d'aspiration forme une pièce distincte de la conduite d'aspiration.The suction mouth 40 that will be described is intended to replace the suction mouth 30 shown in Figures 1 and 2. This suction mouth 30 is intended to be fixed on the lower part of the frame 22 of the excavating machine 20 to be connected to the suction pipe 32. the suction mouth forms a separate part of the suction pipe.

Pour repérer la bouche d'aspiration 40 par rapport à l'ensemble de la machine d'excavation, on définit un premier plan médian du châssis de la machine référencée PP' qui est parallèle aux axes de rotation XX' des ensembles de coupe 26 et 28 et un deuxième plan médian QQ' qui lui est orthogonal. Selon sa direction parallèle au plan PP', la bouche d'aspiration a une dimension qui est très supérieure au diamètre de la conduite d'aspiration. Typiquement, cette longueur est au moins égale à quatre fois le diamètre de la conduite.To locate the suction mouth 40 with respect to the entire excavating machine, a first center plane of the machine frame PP 'is defined which is parallel to the axes of rotation XX' of the cutting assemblies 26 and 28 and a second median plane QQ 'which is orthogonal to it. According to its direction parallel to plane PP ', the suction mouth has a dimension which is much greater than the diameter of the suction pipe. Typically, this length is at least four times the diameter of the pipe.

La bouche d'aspiration 40 est constituée essentiellement par une paroi externe 42 comprenant deux faces principales 44 et 46 s'étendant sensiblement parallèlement au plan médian PP' et deux faces d'extrémité 48 et 50 s'étendant sensiblement parallèlement au plan médian QQ'. La face supérieure 52 de la paroi externe 42 définit un orifice axial 54 qui est aménagé dans une bride 56 de fixation de la bouche d'aspiration sur la partie inférieure du châssis 22 de la machine. La paroi externe 42 de la bouche d'aspiration définit un volume interne 57 dans lequel débouche à sa partie supérieure l'orifice 54. Le bord inférieur 44a, 46a des faces principales 44 et 46 de la paroi externe définit une ouverture inférieure d'aspiration 58. Les bords 44a et 46a sont sensiblement disposés dans un même plan orthogonal aux deux plans PP' et QQ'. Cette ouverture 58 est disposée symétriquement par rapport au plan médian PP'. L'ouverture 58 s'étend sensiblement sur toute la longueur de la bouche d'aspiration.The suction mouth 40 consists essentially of an outer wall 42 comprising two main faces 44 and 46 extending substantially parallel to the median plane PP 'and two end faces 48 and 50 extending substantially parallel to the median plane QQ' . The upper face 52 of the outer wall 42 defines an axial orifice 54 which is arranged in a flange 56 for fixing the suction mouth on the lower part of the frame 22 of the machine. The outer wall 42 of the suction mouth defines an internal volume 57 in which opens at its upper part the orifice 54. The lower edge 44a, 46a of the main faces 44 and 46 of the outer wall defines a lower suction opening 58. The edges 44a and 46a are substantially arranged in the same plane orthogonal to the two planes PP 'and QQ'. This opening 58 is arranged symmetrically with respect to the median plane PP '. The opening 58 extends substantially the entire length of the suction mouth.

A l'intérieur du volume interne 56 de la bouche d'aspiration, est montée une pièce 60 en forme de bulbe qui s'étend parallèlement aux axes de rotation des ensembles de coupe et qui est symétrique par rapport au plan médian PP'. Cette pièce interne 60 définit avec les deux faces principales 44 et 46 de la bouche d'aspiration deux passages latéraux internes 62 et 64 qui raccordent ainsi l'ouverture inférieure d'aspiration 58 et l'orifice de sortie 54. Comme on le voit sur la figure 4, les faces principales 44 et 46 sont incurvées de telle manière que les passages 62 et 64 présentent une section au plus constante lorsque l'on va de l'ouverture inférieure 58 vers l'orifice supérieur 54. En d'autres termes, cette section de passage est sensiblement constante ou elle va en diminuant. En outre, compte tenu de la forme de la pièce interne 60 et des faces principales 44 et 46 de la bouche d'aspiration, les passages 62 et 64 ne présentent pas de singularité et notamment pas de variation brusque de coupure.Inside the internal volume 56 of the suction mouth is mounted a bulbous piece 60 which extends parallel to the axes of rotation of the cutting assemblies and which is symmetrical with respect to the median plane PP '. This internal part 60 defines with the two main faces 44 and 46 of the suction mouth two internal lateral passages 62 and 64 which thus connect the lower suction opening 58 and the outlet orifice 54. As can be seen on Figure 4 the main faces 44 and 46 are curved in such a way that the passages 62 and 64 have a section at most constant when going from the lower opening 58 to the upper orifice 54. In other words, this section of passage is substantially constant or decreasing. In addition, given the shape of the inner part 60 and the main faces 44 and 46 of the suction mouth, the passages 62 and 64 do not have a singularity and in particular no abrupt change of cut.

La bouche d'aspiration comporte également une pièce formant grille 70 qui est fixée sur l'ouverture inférieure 58 de la bouche d'aspiration. Cette pièce formant grille est constituée essentiellement par des barres 72, 74, 76 sur lesquelles sont fixés des fers ronds en forme de V tels que 80. Des plaques d'extrémité 82, 84 servent à fixer la pièce 70 sur la paroi externe de la bouche d'aspiration.The suction mouth also has a grid member 70 which is attached to the lower opening 58 of the suction mouth. This grid member consists essentially of bars 72, 74, 76 on which are fixed V-shaped round bars such as 80. End plates 82, 84 serve to fix the piece 70 on the outer wall of the suction mouth.

Cette pièce en forme de grille sert à empêcher l'aspiration de déblais ou d'éléments trop volumineux par la bouche d'aspiration qui risqueraient d'obturer les conduites d'aspiration ou même la pompe d'aspiration.This grid-shaped piece serves to prevent the suction of cuttings or too bulky items through the suction mouth that could close the suction lines or even the suction pump.

En variante, on pourrait prévoir dans la partie inférieure de la bouche d'aspiration non pas une seule ouverture mais plusieurs ouvertures s'étendant globalement selon la direction des axes de rotation des ensembles de coupe de la machine d'excavation.Alternatively, one could provide in the lower part of the suction mouth not a single opening but several openings extending generally in the direction of the axes of rotation of the cutting units of the excavating machine.

Sur la figure 6, on a représenté le principe de fonctionnement de la bouche d'aspiration selon l'invention. Sur cette figure, on a représenté les deux ensembles rotatifs de coupe 26, 28 et par les flèches F, les lignes d'écoulement du liquide de forage entraîné par la rotation des ensembles rotatifs 26 et 28. Grâce à la position de l'ouverture inférieure 58 de la bouche d'aspiration 40, qui est sensiblement orthogonal aux lignes d'écoulement, on voit que cette ouverture intercepte la plus grande partie de l'écoulement du liquide de forage et récupère donc ainsi la plus grande partie des sédiments et déblais entraînés par la circulation de ce liquide.In Figure 6, there is shown the operating principle of the suction mouth according to the invention. In this figure, there is shown the two rotary cutting assemblies 26, 28 and the arrows F, the flow lines of the drilling fluid driven by the rotation of the rotating assemblies 26 and 28. Due to the position of the opening lower 58 of the suction mouth 40, which is substantially orthogonal to the flow lines, we see that this opening intercepts most of the flow of the drilling fluid and thus recovers most of the sediment and cuttings driven by the circulation of this liquid.

Claims (7)

Bouche d'aspiration pour une machine d'excavation de tranchée travaillant dans un liquide de forage et comprenant un châssis sur lequel sont montés deux ensembles, rotatifs de coupe à axes parallèles, ladite bouche étant destinée à être montée à l'extrémité inférieure du châssis entre les deux ensembles rotatifs de coupe, ladite bouche étant caractérisée en ce qu'elle comprend une paroi externe définissant un volume interne, une ouverture supérieure raccordable à une conduite d'aspiration et au moins une ouverture inférieure symétrique par rapport au premier plan médian vertical du châssis parallèle aux axes de rotation, et s'étendant selon la direction desdits axes de rotation, par quoi ladite ouverture est sensiblement orthogonale à l'écoulement du liquide de forage entraîné par la rotation desdits ensembles de coupe.Suction mouth for a trench digging machine working in a drilling fluid and comprising a frame on which are mounted two sets, rotary cutting parallel axes, said mouth being intended to be mounted at the lower end of the frame between the two rotary cutting assemblies, said mouth being characterized in that it comprises an outer wall defining an internal volume, an upper opening connectable to a suction pipe and at least one lower opening symmetrical with respect to the first vertical median plane the chassis parallel to the axes of rotation, and extending in the direction of said axes of rotation, whereby said opening is substantially orthogonal to the flow of the drilling liquid driven by the rotation of said cutting assemblies. Bouche d'aspiration selon la revendication 1, caractérisée en ce qu'elle comprend une unique ouverture s'étendant sur une longueur sensiblement égale à la dimension des ensembles de coupe selon la direction de leurs axes de rotation.Suction mouth according to claim 1, characterized in that it comprises a single opening extending over a length substantially equal to the size of the cutting assemblies in the direction of their axes of rotation. Bouche d'aspiration selon l'une quelconque des revendications 1 et 2, caractérisée en ce qu'elle comprend en outre, dans le volume interne, une pièce en forme de bulbe symétrique par rapport à un deuxième plan médian orthogonal au premier et profilée de telle manière qu'en coupe par ledit deuxième plan médian, les deux passages définis par ladite pièce profilée et ladite paroi externe aient une section allant au plus en restant constante en s'éloignant de ladite ouverture inférieure.Suction mouth according to any one of claims 1 and 2, characterized in that it further comprises, in the internal volume, a bulbous piece symmetrical with respect to a second median plane orthogonal to the first and profiled of such that in section through said second median plane, the two passages defined by said profiled piece and said outer wall have a section of at most remaining constant away from said lower opening. Bouche d'aspiration selon l'une quelconque des revendications 1 à 3, caractérisée en ce que ladite ouverture inférieure est munie d'une structure d'usure pour retenir les débris les plus importants contenus dans le liquide de forage.Suction mouth according to any one of claims 1 to 3, characterized in that said lower opening is provided with a wear structure for retaining the most important debris contained in the drilling fluid. Bouche d'aspiration selon l'une quelconque des revendications 1 à 4, caractérisée en ce que ladite paroi externe comprend deux faces principales s'étendant selon la direction desdits axes de rotation et deux faces d'extrémité.Suction mouth according to any one of claims 1 to 4, characterized in that said outer wall comprises two main faces extending in the direction of said axes of rotation and two end faces. Bouche d'aspiration selon la revendication 5, caractérisée en ce que les bords inférieurs desdites faces principales définissant l'ouverture inférieure sont sensiblement disposés dans un même plan orthogonal aux deux plans médians.Suction mouth according to claim 5, characterized in that the lower edges of said main faces defining the lower opening are substantially arranged in the same plane orthogonal to the two median planes. Machine d'excavation de tranchée caractérisée en ce qu'elle comprend une bouche d'aspiration selon l'une quelconque des revendications 1 à 6.Trench excavation machine characterized in that it comprises a suction mouth according to any one of claims 1 to 6.
EP06111158A 2005-03-31 2006-03-15 Suction mouth for a trench excavating machine. Withdrawn EP1707687A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0503131A FR2883893B1 (en) 2005-03-31 2005-03-31 SUCTION MOUTH FOR TRANCHE EXCAVATION MACHINE

Publications (2)

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EP1707687A2 true EP1707687A2 (en) 2006-10-04
EP1707687A3 EP1707687A3 (en) 2007-11-07

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EP06111158A Withdrawn EP1707687A3 (en) 2005-03-31 2006-03-15 Suction mouth for a trench excavating machine.

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EP (1) EP1707687A3 (en)
FR (1) FR2883893B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2950086A1 (en) * 2009-09-15 2011-03-18 Soletanche Freyssinet EXCAVATION MACHINE COMPRISING AT LEAST ONE DRUM COVERED BY A DEFLECTOR
DE102021114947A1 (en) 2021-06-10 2022-12-15 Liebherr-Werk Nenzing Gmbh diaphragm wall cutter

Citations (1)

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Publication number Priority date Publication date Assignee Title
EP0730064A1 (en) 1995-02-28 1996-09-04 Compagnie Du Sol Trenching apparatus for digging deep trenches

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IT1209018B (en) * 1983-01-24 1989-07-10 Casagrande Spa MILLING BUCKET.
JPS6245831A (en) * 1985-08-22 1987-02-27 Nippon Ikosu Kk Underground trencher
FR2600119B1 (en) * 1986-06-11 1988-08-26 Soletanche MOTOR PUMP FOR MILLING MACHINE FOR Digging Trenches In The Ground
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Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
EP0730064A1 (en) 1995-02-28 1996-09-04 Compagnie Du Sol Trenching apparatus for digging deep trenches

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2950086A1 (en) * 2009-09-15 2011-03-18 Soletanche Freyssinet EXCAVATION MACHINE COMPRISING AT LEAST ONE DRUM COVERED BY A DEFLECTOR
DE102021114947A1 (en) 2021-06-10 2022-12-15 Liebherr-Werk Nenzing Gmbh diaphragm wall cutter

Also Published As

Publication number Publication date
EP1707687A3 (en) 2007-11-07
FR2883893B1 (en) 2007-06-22
FR2883893A1 (en) 2006-10-06

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