EP2138637B1 - Elongated vibrator made from several removable elements assembled with one another by secured links - Google Patents

Elongated vibrator made from several removable elements assembled with one another by secured links Download PDF

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Publication number
EP2138637B1
EP2138637B1 EP09305578.8A EP09305578A EP2138637B1 EP 2138637 B1 EP2138637 B1 EP 2138637B1 EP 09305578 A EP09305578 A EP 09305578A EP 2138637 B1 EP2138637 B1 EP 2138637B1
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Prior art keywords
cavity
elements
vibrator
tip
screws
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German (de)
French (fr)
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EP2138637A1 (en
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Guillaume Dazin
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02—Improving by compacting
    • E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
    • E02D3/054—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil involving penetration of the soil, e.g. vibroflotation

Definitions

  • the present invention relates to a longiform vibrator made of several removable elements assembled to each other by secure connections.
  • the longiform vibrators commonly used at the present time consist of a tubular element which may comprise one or more sections, the upper end of which is provided with suspension means to a hoist and / or guide and whose lower end is connected to a tip comprising successively a vibration damper-isolator, a vibration generator and a tip provided with a protective shell.
  • the vibration generator comprises one or more eccentric flyweights rotatably mounted about the central longitudinal axis of the longiform vibrator and driven in rotation by a hydraulic or electric motor, via a coupling, or even a gear train. at a rotation speed of the order of 1500 to 3500 rpm.
  • the centrifugal force generated by these weights operates omnidirectionally in a plane perpendicular to the longitudinal median axis of the longiform vibrator.
  • the order of magnitude of the centrifugal force is typically 100 to 500 kN depending on the model.
  • Screw-type assemblies are unreliable because of the increased risk of unscrewing and abrasion of the ground that can be exerted on the screw head, the nut or the thread itself.
  • the invention therefore more particularly aims to solve this problem. It proposes for this purpose a longiform vibrator of the aforementioned type, as known from the document US 4006886 A1 comprising a butt joint of at least two coaxial elements.
  • this assembly involves a plurality of fixing screws whose heads or nuts are accessible thanks to at least one cavity provided in at least one of said elements and at least one removable locking piece which engages in said cavity bearing on said heads or said nuts, so as to ensure the captivity of said screws and to prevent the assembly can dissociate during use.
  • This locking piece has, in addition, the advantage of providing additional protection of the assembly screws.
  • the vibrator may comprise protection means designed to cover at least the junction zone between the two elements thus maintaining the locking piece in said cavity and thus protecting the fastening means of this locking piece. inside the cavity.
  • the aforesaid cavity may consist of an annular groove provided in one of the two elements or even in a flange serving to connect the two elements.
  • the tubular upper part 2 is equipped at its upper end with a lifting head 7 provided with a pulley 8 and circuit connections. supplying water or compressed air from an assistance jetting system with a jet of water or air.
  • This pulley 8 can be replaced by a sliding fastening device on a guide mast
  • the damper 3 is designed to fully filter the vibrations towards the hoist of the longiform vibrator that is used (crane or mast).
  • the vibration generator 4 is in the form of a cylindrical element comprising a cylindrical section 10 and a vibration generating module 11 enclosing the eccentric flyweights and the possible pinion ensuring its rotational drive.
  • the motor 12 coupled to this gear can consist of a hydraulic motor or an electric motor: This motor 12 is possibly designed to allow a variation of its rotational speed.
  • the vibration generation module 11 is itself connected to the tubular section 10 which serves in particular to receive power supply and control elements of the motor 12.
  • the longiform vibrator 1 previously described can be mounted in pendular mode on a crane, the cable of the crane passing around the pulley 8 of the lifting head 7. Under the effect of the vibrations generated by the vibration generator, it s' sinks into the ground because of its own weight. This depression can be assisted by jetting with water or air (injection of water or air at the tip 5 and / or the protective shell 6).
  • the long-form vibrator can be mounted on a guide mast.
  • it may be subjected to an additional driving force generated by an actuator that may consist of a jack or even a winch system / return pulleys.
  • this longiform vibrator can be used for the vibro-compaction of loose soil and for vibro-substitution (flexible inclusion) or even for the realization of ballasted columns.
  • the tip 5, the vibration generating module 11 and the tubular section 10 each comprise two ribs respectively 13, 14, 15, diametrically opposite.
  • the ribs 13, 14, 15 counterparts are aligned to form two ribs for fixing by screwing the two protective shells 16, 17.
  • These two protective shells 16, 17 are made of sheet metal and have a shape substantially semicylindrical, provided with two lateral flanges 18, 19, 20, 21, radially projecting, intended to bear and to be fixed by screwing (screw V, nuts E) on the radial faces of the ribs 13, 14, 15, as illustrated on the figure 2 .
  • the assembly of the vibration generating module 11 on the tip 5 is provided by means of a circular flange 25 of axial section in the shape of an inverted H whose parallel wings 26 are provided with an annular cavity 27 of rectangular axial section delimited axially by two circular rings 28, 29 radially projecting.
  • Each of these rings 28, 29 is provided with a plurality of axial bores chambered on the side of the cavity 27. These bores are each intended to receive a fixing screw 30 which is screwed into a tapped axial bore 31 provided for in the case the tip and in the vibration generation module. At the end of screwing, the head 32 of the screw engages in the recess 33 whose depth is substantially equal to the height of said head 32.
  • the head 32 in order to perform the screwing, will be provided with an axial recess suitable for a key or a screwdriver of conventional type.
  • the captive fastening screws 30 are secured by means of locking elements constituted here by two half-rings C 1 , C 2 -C ' 1 , C' 2 , of rectangular axial section substantially complementary to that of the cavity 27 in which they come to engage with a game almost zero.
  • the two half crowns C 1 , C ' 1 - C 2 , C' 2 of each of the locking elements can be fixed to one another, for example by screwing by means of screws 34. proves optional insofar as these half crowns C 1 , C ' 1 - C 2 , C' 2 are held captive in the cavity 27 by the plate of the two protective shells 16, 17. These two protective shells 16, 17 ensure the protection of the assembly consisting of the vibration generating module 11 and the tubular section 10 of the external abrasion and thus makes the captive half-crowns C 1 , C ' 1 - C 2 , C' 2 .
  • a major advantage of the previously described solution is that it provides easy access to the vibration generating module which constitutes a sensitive element of the longiform vibrator:
  • the vibration generating module can be easily dismantled on site and shipped at the factory for its maintenance. It can be easily replaced. These assembly / disassembly operations do not affect the resistance of the longiform vibrator and its ability to transmit vibrations.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Description

La présente invention concerne un vibrateur longiforme réalisé en plusieurs éléments démontables assemblés les uns aux autres par des liaisons sécurisées.The present invention relates to a longiform vibrator made of several removable elements assembled to each other by secure connections.

Elle s'applique plus particulièrement à des vibrateurs longiformes utilisés notamment dans les procédés d'amélioration des sols tels que la vibro-compaction, (vibro-flottation) ou la vibro-substitution pour la réalisation éventuelle de colonnes ballastées.It applies more particularly to longiform vibrators used in particular in soil improvement processes such as vibro-compaction (vibro-flotation) or vibro-substitution for the possible realization of ballasted columns.

D'une manière générale, on sait que les vibrateurs longiformes couramment utilisés à l'heure actuelle se composent d'un élément tubulaire pouvant comprendre un ou plusieurs tronçons, dont l'extrémité supérieure est munie de moyens de suspension à un engin de levage et/ou de guidage et dont l'extrémité inférieure est connectée à un embout comportant successivement un amortisseur-isolateur de vibrations, un générateur de vibrations et une pointe munie d'une coquille de protection.In general, it is known that the longiform vibrators commonly used at the present time consist of a tubular element which may comprise one or more sections, the upper end of which is provided with suspension means to a hoist and / or guide and whose lower end is connected to a tip comprising successively a vibration damper-isolator, a vibration generator and a tip provided with a protective shell.

Le générateur de vibrations comprend une ou plusieurs masselottes excentriques montées rotatives autour de l'axe central longitudinal du vibrateur longiforme et entraînées en rotation par un moteur hydraulique ou électrique, par l'intermédiaire d'un accouplement, voire d'un train d'engrenages à une vitesse de rotation de l'ordre de 1 500 à 3 500 T/min. La force centrifuge engendrée par ces masselottes s'exerce omnidirectionnellement dans un plan perpendiculaire à l'axe médian longitudinal du vibrateur longiforme. L'ordre de grandeur de la force centrifuge est typiquement de 100 à 500 kN selon les modèles.The vibration generator comprises one or more eccentric flyweights rotatably mounted about the central longitudinal axis of the longiform vibrator and driven in rotation by a hydraulic or electric motor, via a coupling, or even a gear train. at a rotation speed of the order of 1500 to 3500 rpm. The centrifugal force generated by these weights operates omnidirectionally in a plane perpendicular to the longitudinal median axis of the longiform vibrator. The order of magnitude of the centrifugal force is typically 100 to 500 kN depending on the model.

De nombreuses contraintes techniques s'appliquent au vibrateur longiforme :

  • la force centrifuge génère de fortes contraintes mécaniques dans les pièces constituantes,
  • la vibration ainsi générée crée des problèmes de fatigue des matériaux, ainsi qu'un risque accru de desserrage des assemblages vissés,
  • le vibrateur longiforme est soumis au frottement du sol : toutes les surfaces externes subissent une très forte abrasion,
  • des contraintes de poids et d'encombrement s'ajoutent,
  • le démontage et le remontage doivent être faciles pour limiter les temps d'arrêt de chantier en cas de panne et limiter les coûts d'exploitation.
Many technical constraints apply to the longiform vibrator:
  • the centrifugal force generates high mechanical stresses in the constituent parts,
  • the vibration thus generated creates problems of fatigue of the materials, as well as an increased risk of loosening of the screwed assemblies,
  • the longiform vibrator is subjected to the friction of the ground: all the external surfaces undergo a very strong abrasion,
  • weight and space constraints are added,
  • disassembly and reassembly must be easy to limit downtime in case of failure and limit operating costs.

Toutes ces contraintes rendent la conception délicate. La fiabilité du matériel est souvent aléatoire.All these constraints make the design delicate. The reliability of the material is often random.

Les assemblages de type vissé sont peu fiables à cause du risque accru de dévissage et de l'abrasion du sol qui peut s'exercer sur la tête de vis, l'écrou ou le filet lui-même.Screw-type assemblies are unreliable because of the increased risk of unscrewing and abrasion of the ground that can be exerted on the screw head, the nut or the thread itself.

Le type d'assemblage le plus couramment utilisé est la soudure mais celle-ci rend le démontage difficile, voire impossible.The most commonly used assembly type is soldering but this makes dismantling difficult or impossible.

Or, en raison des contraintes élevées qu'il subit, le générateur de vibrations doit pouvoir être démonté pour assurer sa maintenance.However, because of the high stresses it undergoes, the vibration generator must be disassembled to ensure its maintenance.

L'invention a donc plus particulièrement pour but de résoudre ce problème. Elle propose à cet effet un vibrateur longiforme du type susdit, comme celui connu du document US 4006886 A1 , comprenant un assemblage bout à bout d'au moins deux éléments coaxiaux.The invention therefore more particularly aims to solve this problem. It proposes for this purpose a longiform vibrator of the aforementioned type, as known from the document US 4006886 A1 comprising a butt joint of at least two coaxial elements.

Selon l'invention, cet assemblage fait intervenir une pluralité de vis de fixation dont les têtes ou les écrous sont accessibles grâce à au moins une cavité prévue dans au moins l'un desdits éléments et au moins une pièce de verrouillage amovible qui s'engage dans ladite cavité en prenant appui sur lesdites têtes ou lesdits écrous, de manière à assurer l'imperdabilité desdites vis et à éviter que l'assemblage ne puisse se dissocier pendant l'utilisation.According to the invention, this assembly involves a plurality of fixing screws whose heads or nuts are accessible thanks to at least one cavity provided in at least one of said elements and at least one removable locking piece which engages in said cavity bearing on said heads or said nuts, so as to ensure the captivity of said screws and to prevent the assembly can dissociate during use.

Cette pièce de verrouillage présente, en outre, l'avantage d'apporter un complément de protection des vis d'assemblage.This locking piece has, in addition, the advantage of providing additional protection of the assembly screws.

Avantageusement, le vibrateur pourra comprendre des moyens de protection conçus de manière à venir recouvrir au moins la zone de jonction entre les deux éléments en maintenant ainsi la pièce de verrouillage dans ladite cavité et en protégeant en conséquence les moyens de fixation de cette pièce de verrouillage à l'intérieur de la cavité.Advantageously, the vibrator may comprise protection means designed to cover at least the junction zone between the two elements thus maintaining the locking piece in said cavity and thus protecting the fastening means of this locking piece. inside the cavity.

Ainsi, tous les moyens intervenant pour la fixation des deux éléments du vibrateur longiforme se trouvent protégés et ne subissent aucune usure, ce qui facilite un démontage ultérieur.Thus, all the means involved for fixing the two elements of the longiform vibrator are protected and do not undergo any wear, which facilitates subsequent disassembly.

Par ailleurs, la susdite cavité pourra consister en une gorge annulaire prévue dans l'un des deux éléments ou même dans une bride servant à relier les deux éléments.Moreover, the aforesaid cavity may consist of an annular groove provided in one of the two elements or even in a flange serving to connect the two elements.

Un mode d'exécution de l'invention sera décrit ci-après, à titre d'exemple non limitatif, avec référence aux dessins annexés dans lesquels :

  • La figure 1 est une vue en élévation schématique d'un vibrateur longiforme ;
  • La figure 2 est une représentation partielle schématique en perspective de ce vibrateur longiforme après démontage de la coquille de protection ;
  • La figure 3 est une représentation analogue à celle de la figure 2 illustrant le démontage des deux paires de demi couronnes qui constituent les pièces de verrouillage des vis d'assemblage du module de génération des vibrations respectivement sur le tronçon cylindrique et sur la pointe du vibrateur longiforme ;
  • La figure 4 est une vue en perspective schématique illustrant la dépose du module de génération des vibrations ;
  • La figure 5 est une coupe partielle montrant l'assemblage du module de génération des vibrations sur le tronçon cylindrique et sur la pointe du vibrateur longiforme ;
  • La figure 6 est une vue à plus grande échelle montrant l'assemblage du générateur sur la pointe du vibrateur longiforme.
One embodiment of the invention will be described below, by way of non-limiting example, with reference to the accompanying drawings in which:
  • The figure 1 is a schematic elevational view of a longiform vibrator;
  • The figure 2 is a schematic partial perspective representation of this longiform vibrator after dismantling the protective shell;
  • The figure 3 is a representation similar to that of the figure 2 illustrating the disassembly of the two pairs of half-rings which constitute the locking pieces of the assembly screws of the vibration generating module respectively on the cylindrical section and on the tip of the longiform vibrator;
  • The figure 4 is a schematic perspective view illustrating the removal of the vibration generating module;
  • The figure 5 is a partial section showing the assembly of the vibration generating module on the cylindrical section and on the tip of the longiform vibrator;
  • The figure 6 is an enlarged view showing the assembly of the generator on the tip of the longiform vibrator.

Dans cet exemple, le vibrateur longiforme 1 se compose successivement :

  • d'une partie supérieure tubulaire 2 pouvant comprendre un ou plusieurs éléments (rallonges) par exemple de cinq mètres de longueur,
  • d'un amortisseur de vibration 3,
  • d'un générateur de vibrations 4,
  • d'une pointe 5, et
  • de deux coquilles de protection 6 recouvrant une partie du générateur de vibrations 4.
In this example, the longiform vibrator 1 is successively composed of:
  • a tubular upper portion 2 may comprise one or more elements (extensions) for example five meters in length,
  • a vibration damper 3,
  • a vibration generator 4,
  • a point 5, and
  • two protective shells 6 covering part of the vibration generator 4.

La partie supérieure tubulaire 2 est équipée à son extrémité supérieure d'une tête de levage 7 munie d'une poulie 8 ainsi que de connexions pour circuits d'alimentation en eau ou en air comprimé d'un système de lançage d'assistance avec jet d'eau ou d'air. Cette poulie 8 peut être remplacée par un dispositif de fixation coulissant sur un mât de guidageThe tubular upper part 2 is equipped at its upper end with a lifting head 7 provided with a pulley 8 and circuit connections. supplying water or compressed air from an assistance jetting system with a jet of water or air. This pulley 8 can be replaced by a sliding fastening device on a guide mast

L'amortisseur 3 est conçu pour filtrer entièrement les vibrations en direction de l'engin de levage du vibrateur longiforme qui est utilisé (grue ou mât).The damper 3 is designed to fully filter the vibrations towards the hoist of the longiform vibrator that is used (crane or mast).

Le générateur de vibrations 4 se présente sous la forme d'un élément cylindrique comportant un tronçon cylindrique 10 et un module de génération de vibrations 11 renfermant les masselottes excentriques ainsi que l'éventuelle pignonerie assurant son entraînement en rotation. Le moteur 12 couplé à cette pignonerie peut consister en un moteur hydraulique ou un moteur électrique : Ce moteur 12 est éventuellement conçu de manière à permettre une variation de sa vitesse de rotation.The vibration generator 4 is in the form of a cylindrical element comprising a cylindrical section 10 and a vibration generating module 11 enclosing the eccentric flyweights and the possible pinion ensuring its rotational drive. The motor 12 coupled to this gear can consist of a hydraulic motor or an electric motor: This motor 12 is possibly designed to allow a variation of its rotational speed.

Le module de génération des vibrations 11 est lui-même relié au tronçon tubulaire 10 qui sert notamment à recevoir des éléments d'alimentation et de contrôle du moteur 12.The vibration generation module 11 is itself connected to the tubular section 10 which serves in particular to receive power supply and control elements of the motor 12.

Le vibrateur longiforme 1 précédemment décrit peut être monté en mode pendulaire sur une grue, le câble de la grue passant autour de la poulie 8 de la tête de levage 7. Sous l'effet des vibrations engendrées par le générateur de vibrations, il s'enfonce dans le sol du fait de son propre poids. Cet enfoncement peut être assisté par un lançage à l'eau ou à l'air (injection d'eau ou d'air au niveau de la pointe 5 et/ou de la coquille de protection 6).The longiform vibrator 1 previously described can be mounted in pendular mode on a crane, the cable of the crane passing around the pulley 8 of the lifting head 7. Under the effect of the vibrations generated by the vibration generator, it s' sinks into the ground because of its own weight. This depression can be assisted by jetting with water or air (injection of water or air at the tip 5 and / or the protective shell 6).

Néanmoins, le vibrateur longiforme peut être monté sur un mât de guidage. Dans ce cas, il peut être soumis à une force d'enfoncement supplémentaire engendrée par un actionneur pouvant consister en un vérin ou même un système treuil/poulies de renvoi.Nevertheless, the long-form vibrator can be mounted on a guide mast. In this case, it may be subjected to an additional driving force generated by an actuator that may consist of a jack or even a winch system / return pulleys.

Comme précédemment mentionné, ce vibrateur longiforme peut être utilisé pour la vibro-compaction des sols meubles et pour la vibro-substitution (inclusion souple) ou même pour la réalisation de colonnes ballastées.As previously mentioned, this longiform vibrator can be used for the vibro-compaction of loose soil and for vibro-substitution (flexible inclusion) or even for the realization of ballasted columns.

Comme illustré sur les figures 2 à 6, la pointe 5, le module de génération des vibrations 11 et le tronçon tubulaire 10 comprennent chacun deux nervurations respectivement 13, 14, 15, diamétralement opposées. En position assemblée, les nervurations 13, 14, 15 homologues sont alignées pour former deux nervures servant à assurer la fixation par vissage des deux coquilles de protection 16, 17. Ces deux coquilles de protection 16, 17 sont réalisées en tôle et présentent une forme sensiblement hémicylindrique, munie de deux rebords latéraux 18, 19, 20, 21, radialement en saillie, destinés à venir en appui et à être fixés par vissage (vis V, écrous E) sur les faces radiales des nervures 13, 14, 15, comme illustré sur la figure 2.As illustrated on Figures 2 to 6 , the tip 5, the vibration generating module 11 and the tubular section 10 each comprise two ribs respectively 13, 14, 15, diametrically opposite. In the assembled position, the ribs 13, 14, 15 counterparts are aligned to form two ribs for fixing by screwing the two protective shells 16, 17. These two protective shells 16, 17 are made of sheet metal and have a shape substantially semicylindrical, provided with two lateral flanges 18, 19, 20, 21, radially projecting, intended to bear and to be fixed by screwing (screw V, nuts E) on the radial faces of the ribs 13, 14, 15, as illustrated on the figure 2 .

L'assemblage du module de génération des vibrations 11 sur la pointe 5 est assuré au moyen d'une bride circulaire 25 de section axiale en forme de H renversé dont les ailes parallèles 26 sont munies d'une cavité annulaire 27 de section axiale rectangulaire délimitées axialement par deux couronnes circulaires 28, 29 radialement en saillie.The assembly of the vibration generating module 11 on the tip 5 is provided by means of a circular flange 25 of axial section in the shape of an inverted H whose parallel wings 26 are provided with an annular cavity 27 of rectangular axial section delimited axially by two circular rings 28, 29 radially projecting.

Chacune de ces couronnes 28, 29 est munie d'une pluralité de perçages axiaux chambrés du côté de la cavité 27. Ces perçages sont chacun destinés à recevoir une vis de fixation 30 venant se visser dans un alésage axiale taraudé 31 prévu selon le cas dans la pointe et dans le module de génération des vibrations. En fin de vissage, la tête 32 de la vis s'engage dans le chambrage 33 dont la profondeur est sensiblement égale à la hauteur de ladite tête 32.Each of these rings 28, 29 is provided with a plurality of axial bores chambered on the side of the cavity 27. These bores are each intended to receive a fixing screw 30 which is screwed into a tapped axial bore 31 provided for in the case the tip and in the vibration generation module. At the end of screwing, the head 32 of the screw engages in the recess 33 whose depth is substantially equal to the height of said head 32.

Avantageusement, pour pouvoir effectuer le vissage, la tête 32 sera munie d'une empreinte axiale appropriée à une clef ou à un embout de vissage de type classique.Advantageously, in order to perform the screwing, the head 32 will be provided with an axial recess suitable for a key or a screwdriver of conventional type.

L'imperdabilité des vis de fixation 30 est assurée grâce à des éléments de verrouillage constitués ici par deux demi couronnes C1, C2 - C'1, C'2, de section axiale rectangulaire sensiblement complémentaire à celle de la cavité 27 dans laquelle elles viennent s'engager avec un jeu quasi nul.The captive fastening screws 30 are secured by means of locking elements constituted here by two half-rings C 1 , C 2 -C ' 1 , C' 2 , of rectangular axial section substantially complementary to that of the cavity 27 in which they come to engage with a game almost zero.

Par conséquent, les vis 31 ne peuvent pas se dévisser au-delà de ce jeu.Therefore, the screws 31 can not be unscrewed beyond this game.

Les deux demi couronnes C1, C'1 - C2, C'2 de chacun des éléments de verrouillage peuvent être fixées l'une à l'autre, par exemple par vissage au moyen de vis 34. Néanmoins, cette fixation s'avère facultative dans la mesure où ces demi couronnes C1, C'1 - C2, C'2 sont retenues prisonnières dans la cavité 27 par la tôle des deux coquilles de protection 16, 17. Ces deux coquilles de protection 16, 17 assurent la protection de l'ensemble constitué par le module de génération des vibrations 11 et le tronçon tubulaire 10 de l'abrasion externe et rend donc les demi couronnes imperdables C1, C'1 - C2, C'2.The two half crowns C 1 , C ' 1 - C 2 , C' 2 of each of the locking elements can be fixed to one another, for example by screwing by means of screws 34. proves optional insofar as these half crowns C 1 , C ' 1 - C 2 , C' 2 are held captive in the cavity 27 by the plate of the two protective shells 16, 17. These two protective shells 16, 17 ensure the protection of the assembly consisting of the vibration generating module 11 and the tubular section 10 of the external abrasion and thus makes the captive half-crowns C 1 , C ' 1 - C 2 , C' 2 .

Un avantage important de la solution précédemment décrite consiste en ce qu'elle permet d'accéder facilement au module de génération des vibrations qui constitue un élément sensible du vibrateur longiforme : Le module de génération des vibrations peut être facilement démonté sur site et expédié en usine pour sa maintenance. Il peut être aisément remplacé. Ces opérations de montage/démontage n'affectent en rien la résistance du vibrateur longiforme et son aptitude à transmettre des vibrations.A major advantage of the previously described solution is that it provides easy access to the vibration generating module which constitutes a sensitive element of the longiform vibrator: The vibration generating module can be easily dismantled on site and shipped at the factory for its maintenance. It can be easily replaced. These assembly / disassembly operations do not affect the resistance of the longiform vibrator and its ability to transmit vibrations.

Bien entendu, l'invention ne se limite pas au mode d'exécution précédemment décrit.Of course, the invention is not limited to the embodiment described above.

Ainsi, par exemple :

  • les vis peuvent être remplacées par des goujons et des écrous,
  • les tôles de protection peuvent avoir n'importe quelle forme, pour autant qu'elles recouvrent les demi couronnes,
  • les demi couronnes peuvent éventuellement être intégrées dans les coquilles de protection,
  • les deux demi couronnes peuvent être remplacées par des fractions de couronne, par exemple trois, quatre ....fractions,
  • les vis 30 peuvent être implantées sur un seul côté de l'évidement ou sur les deux côtés opposés comme sur la figure 4.
For example:
  • the screws can be replaced by studs and nuts,
  • the protective plates may have any shape, provided that they cover the half crowns,
  • the half crowns can possibly be integrated into the protective shells,
  • the two half crowns may be replaced by crown fractions, for example three, four ... fractions,
  • the screws 30 can be implanted on one side of the recess or on the two opposite sides as on the figure 4 .

Claims (7)

  1. Elongated vibrator produced as several disconnectable elements, assembled end to end, this vibrator (1) comprising a tubular element (2) comprising one or more portions the upper end of which is fitted with suspension means (7) for suspending it from lifting gear and/or guiding gear and the lower end of which is connected to an end fitting comprising, in succession, a vibration damper-isolator (3), a vibration generator (4) and a tip (5), at least one of the assemblies of the disconnectable elements involving a plurality of fixing screws (30) of which the heads (32) or the nuts are accessible by virtue of at least one cavity (27) provided in at least one of the said elements,
    characterized in that it further comprises at least one removable locking piece (C1, C'1 - C2, C'2) which engages in the said cavity (27), resting against the said heads (32) or the said nuts, and means of fixing this locking piece (C1, C'1 - C2, C'2) inside the cavity (27) so as to render the said screws (30) captive and prevent the assembly from being able to come apart during use.
  2. Vibrator according to Claim 1,
    characterized in that it comprises at least one protective shell designed to cover at least the region where the two elements meet, thereby keeping the locking piece (C1, C'1 - C2, C'2) in the said cavity (27).
  3. Vibrator according to one of Claims 1 and 2,
    characterized in that the aforementioned cavity consists of an annular groove (27) provided in one of the two elements or even in a flange (25) used to connect the two elements.
  4. Vibrator according to one of the preceding claims,
    characterized in that the aforementioned tip (5) and the aforementioned vibration generator each comprise two diametrically opposed ribbings (13, 14) and in that it comprises two substantially hemispherical protective shells (16, 17) equipped with two radially projecting lateral rims which can be fixed to the lateral surfaces of the two ribs formed by the said ribbings (13, 14), these two protective shells (16, 17) trapping the aforementioned locking piece (C1, C'1 - C2, C'2) inside the said cavity (27).
  5. Vibrator according to one of the preceding claims,
    characterized in that the assembly of the vibrating generating module with the tip (5) is performed using a circular flange (25) equipped with an annular cavity (27) delimited by two radially projecting circular rings (28, 29) equipped with a plurality of axial drillings countable on the cavity side, and in that the said drillings are each intended to house a fixing screw (30) that screws into a tapped axial bore (31) provided, as the case may be, in the tip and in the vibration generating module, the counterbore of the said drillings being intended to contain the head (32) of the screws (30) at the end of screwing.
  6. Vibrator according to Claim 5,
    characterized in that the locking element consists of two half-rings (C1, C'1 - C2, C'2) the axial section of which more or less complements that of the cavity (27).
  7. Vibrator according to Claim 6,
    characterized in that the two half-rings (C1, C'1 - C2, C'2) are fixed together by screwing.
EP09305578.8A 2008-06-25 2009-06-19 Elongated vibrator made from several removable elements assembled with one another by secured links Active EP2138637B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0803578A FR2933108B1 (en) 2008-06-25 2008-06-25 LONG-EFFICIENT VIBRATOR PRODUCED IN MULTIPLE REMOVABLE ELEMENTS ASSEMBLED TO ONE BY SECURED CONNECTIONS

Publications (2)

Publication Number Publication Date
EP2138637A1 EP2138637A1 (en) 2009-12-30
EP2138637B1 true EP2138637B1 (en) 2016-06-22

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ID=40254404

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09305578.8A Active EP2138637B1 (en) 2008-06-25 2009-06-19 Elongated vibrator made from several removable elements assembled with one another by secured links

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US (1) US8282264B2 (en)
EP (1) EP2138637B1 (en)
FR (1) FR2933108B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2933108B1 (en) * 2008-06-25 2013-04-26 Ptc LONG-EFFICIENT VIBRATOR PRODUCED IN MULTIPLE REMOVABLE ELEMENTS ASSEMBLED TO ONE BY SECURED CONNECTIONS
CN105970906B (en) * 2016-05-10 2018-08-17 中建筑港集团有限公司 A kind of guider for the treatment of of soft foundation equipment
FR3086563A1 (en) * 2018-09-28 2020-04-03 Societe Turripinoise De Mecanique PROTECTION SLEEVE OF THE FUT OF A PORTABLE VIBRATOR FORMED BY SPIRITS OF A METAL SHEET STRIP

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US2116708A (en) * 1936-01-11 1938-05-10 Master Electric Co Apparatus for compacting concrete and the like
US2597505A (en) * 1945-11-21 1952-05-20 Knut V Lindkvist Tube vibrator
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GB753132A (en) * 1952-06-25 1956-07-18 Sergey Steuerman Vibrator devices
US2951681A (en) * 1957-07-10 1960-09-06 Degen Wilhelm Internal vibrators and a method of operating the same
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US4057222A (en) * 1976-02-17 1977-11-08 Koehring Company Concrete vibrator
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FR2933108B1 (en) * 2008-06-25 2013-04-26 Ptc LONG-EFFICIENT VIBRATOR PRODUCED IN MULTIPLE REMOVABLE ELEMENTS ASSEMBLED TO ONE BY SECURED CONNECTIONS
US20120092948A1 (en) * 2009-01-30 2012-04-19 Racine Federated, Inc.. Concrete vibrator system and motor therefor

Also Published As

Publication number Publication date
US8282264B2 (en) 2012-10-09
US20090324345A1 (en) 2009-12-31
FR2933108A1 (en) 2010-01-01
FR2933108B1 (en) 2013-04-26
EP2138637A1 (en) 2009-12-30

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