EP3551829B1 - Drilling machine comprising an auger and device for cleaning the auger - Google Patents

Drilling machine comprising an auger and device for cleaning the auger Download PDF

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Publication number
EP3551829B1
EP3551829B1 EP17822403.6A EP17822403A EP3551829B1 EP 3551829 B1 EP3551829 B1 EP 3551829B1 EP 17822403 A EP17822403 A EP 17822403A EP 3551829 B1 EP3551829 B1 EP 3551829B1
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EP
European Patent Office
Prior art keywords
carriage
mast
speed
auger
drilling machine
Prior art date
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Application number
EP17822403.6A
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German (de)
French (fr)
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EP3551829A1 (en
Inventor
Laurent Pivert
Régis Bernazinski
Marie Lebreton
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Soletanche Freyssinet SA
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Soletanche Freyssinet SA
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Publication of EP3551829A1 publication Critical patent/EP3551829A1/en
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B12/00—Accessories for drilling tools
    • E21B12/06—Mechanical cleaning devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
    • B08B1/16—Rigid blades, e.g. scrapers; Flexible blades, e.g. wipers
    • B08B1/165—Scrapers

Definitions

  • the present invention relates to the field of cleaning a drilling machine auger, such a machine being generally used for making piles in soil.
  • an auger is a drilling tool formed of a helical blade which is generally wound around a tubular axial rod.
  • the auger is screwed into the ground to the desired depth. Concrete under pressure is then injected by the axial rod under the auger, which has the effect of gradually moving the auger upwards.
  • This operation thus has the advantage of simultaneously carrying out the concreting of the pile, of avoiding the collapse of the walls of the borehole during the extraction of the auger, and of reducing the traction force necessary to extract the auger.
  • the extraction of the auger is generally carried out without rotation of the latter, in order to avoid creating defects in the pile to be produced.
  • certain extractions are accompanied by a rotation of the auger, for example in the context of the manufacture of lug piles.
  • the cuttings are raised between the turns of the auger where they very often remain stuck, even after their exit outside the borehole.
  • Drilling machines are known fitted with cleaning devices making it possible to remove the cuttings lodged between the turns of the auger.
  • some include a rotating doctor blade that fits between two adjacent turns of the auger, the doctor blade rotating around the auger during the ascent, without rotation, of the latter.
  • Such a drilling machine is described in particular in the documents FR 2563861 or EP2749729 .
  • the scraper blade is mounted on a member rotating at the desired speed around the auger, said member being supported by a frame capable of sliding from top to bottom and from bottom to top along the carrying mast from which the post is suspended. auger.
  • This sliding of the frame takes place in the event of a lack of synchronism between the rotational speed of the scraper blade and the vertical extraction speed of the auger.
  • This lack of synchronism has the effect of moving the scraper blade, and therefore the frame, in translation along the mast.
  • the frame will move towards the upper end of the mast, while, conversely, if the auger extraction speed decreases, the frame will move to the lower end of the mast.
  • upper and lower stops are provided to prevent the sliding frame from being taken by the auger to either the upper and lower ends of the mast.
  • An aim of the present invention is to remedy these drawbacks.
  • the invention achieves its object by the fact that the drilling machine further comprises a measuring member for determining the movement of the carriage along the mast relative to an initial position of said carriage, and the cleaning device further comprises a device speed regulator to regulate the speed of rotation of the doctor blade as a function of said carriage movement.
  • Regulating the speed of rotation of the doctor blade corrects the vertical position of the carriage. This speed regulation is preferably carried out in real time so as to maintain the carriage in a predetermined vertical position, for example the initial position of the carriage, or at the very least in an area defined between two predetermined vertical positions, for example a centered area. on the initial position of the carriage, regardless of the pile construction phase.
  • the invention makes it possible to prevent damage to the doctor blade, thanks to the control of the vertical position of the carriage, and also to avoid potentially dangerous human intervention at the level of the carriage thanks to the fact that the doctor blade can remain engaged. between the turns throughout the operations.
  • the carriage in operation of the cleaning device during a concreting phase, the carriage is in the initial position, and the auger is extracted from the ground at a predetermined initial vertical extraction speed and constant.
  • the doctor blade has a determined rotational speed such that the doctor blade makes one complete revolution around the auger when the latter has advanced one pitch of the helical blade. Under these conditions, the carriage does not move.
  • the speed of extraction of the auger is not necessarily constant.
  • the movement of the carriage towards the lower end is determined by the measuring member and the speed of rotation of the doctor blade is regulated as a function of this movement of the carriage.
  • the speed of rotation of the doctor blade is reduced, for example so as to stop or at the very least slow down the vertical movement of the carriage towards the lower end of the mast.
  • the movement of the carriage is determined by the measuring member and the speed of rotation of the doctor blade is regulated as a function of the movement of the carriage.
  • the speed of rotation of the doctor blade is increased, for example so as to stop or slow down the vertical movement of the carriage towards the upper end of the mast. Thanks to this speed regulation, it is possible to prevent the carriage from reaching the upper end of the mast or any upper stopper, which could cause damage to the doctor blade.
  • the measuring member is configured to measure the movement of the carriage relative to its initial position, or at the very least to detect a movement of the carriage towards the end. upper end or lower end of the mast.
  • the speed regulating device is configured to modify the speed of rotation of the doctor blade as a function of the movement of the carriage relative to the initial position, so as to bring the carriage back to the initial position during a movement of the carriage relative to the initial position.
  • the speed regulating device is configured to modify the speed of rotation of the doctor blade as a function of the movement of the carriage relative to the initial position, so as to bring the carriage back to a zone situated around the initial position during a movement of the carriage out of said zone.
  • the speed regulation device therefore makes it possible to maintain the carriage substantially in its initial position, whatever the variations, positive or negative, of the vertical extraction speed of the auger. This ensures that the carriage always remains away from any lower and upper stops.
  • the speed regulating device is configured to increase the speed of rotation of the doctor blade when the trolley moves to an upper end of the mast. It is understood that, depending on its amplitude, the increase in the speed of rotation of the doctor blade has the effect of slowing down or stopping the movement of the carriage towards the upper end, or even of driving the carriage towards the lower end of the mast if the speed of rotation of the doctor blade is greater than the ratio of extraction speed to pitch of the helical blade.
  • This increase in the speed of rotation of the doctor blade is preferably initiated when the movement of the carriage, as determined by the measuring member, is greater than a first predetermined threshold.
  • the speed regulation device is configured to reduce the speed of rotation of the doctor blade when the carriage moves towards a lower end of the mast. It is understood that, depending on its amplitude, the reduction in the speed of rotation of the doctor blade has the effect of slowing down or stopping the movement of the carriage towards the lower end of the mast, or even of moving the carriage towards the upper end of the mast if the speed of rotation of the doctor blade is less than the ratio of extraction speed to pitch of the helical blade.
  • This reduction in the speed of rotation of the doctor blade can be initiated when the movement of the carriage, as determined by the measuring member, is greater than a second predetermined threshold.
  • the speed regulating device is configured so that the value of the speed of rotation of the doctor blade is a function of the value of the displacement of the carriage determined by the measuring member.
  • the speed of rotation of the doctor blade is an increasing function of the value of displacement of the carriage, considered from the initial position towards the upper end of the mast.
  • the speed of rotation of the doctor blade increases more and more as the carriage approaches the upper end of the mast.
  • the speed of rotation of the doctor blade decreases more and more as the carriage approaches the lower end of the mast.
  • the speed control device is configured such that the speed of rotation of the doctor blade is a linearly increasing function of the movement of the carriage along the mast.
  • said measuring member is arranged between the carriage and the mast.
  • the measuring member comprises at least one jack arranged between the body and the mast, the movement of the carriage being determined from the variation in length of the jack.
  • the measuring member comprises a displacement sensor integrated into the jack.
  • the jack is a hydraulic jack.
  • the doctor blade which generally bears on the lower coil, is subjected to significant forces liable to seriously damage it.
  • the cleaning device further comprises a force regulating device for regulating the force applied by the doctor blade on the lower turn.
  • the force regulating device is configured to exert on the carriage a lifting force counteracting at least in part the weight of the carriage, so as to reduce the force exerted by the doctor blade on the lower coil while ensuring that the doctor blade remains in contact with the lower coil.
  • the modulus of the lifting force is equal to a fraction of the weight of the carriage.
  • the force regulation device is arranged between the carriage and the mast.
  • the force regulating device comprises at least one actuator arranged between the body and the mast, the actuator being configured to exert a thrust force on the body, said thrust force being directed in the longitudinal direction of the mast, towards an upper end of the mast.
  • the actuator comprises a hydraulic cylinder.
  • the hydraulic cylinder is supplied at a constant hydraulic fluid pressure.
  • the measuring member comprises the hydraulic cylinder of the actuator.
  • the hydraulic cylinder arranged between the mast and the carriage has an advantageous dual function, namely to determine the displacement of the carriage and to reduce the force exerted by the doctor blade on the lower turn of the helical blade of the auger.
  • the drilling machine 10 is intended for drilling, and in particular piles in the ground. As this type of auger drilling machine is already known elsewhere, only the elements necessary for understanding the invention will be described here.
  • the drilling machine 10 comprises a mast 12 which has a longitudinal direction L ; in this example, the longitudinal direction L is vertical.
  • the drilling machine 10 also comprises an auger 14 having a longitudinal axis A parallel to the longitudinal direction L.
  • the auger 14 comprises a hollow tube 16 which extends along the longitudinal axis A, this tube being fixed to and surrounded by a helical blade 18.
  • auger For the sake of readability, only a portion of the auger is shown in figures 1 to 4 .
  • the auger can be composed of several portions fixed end to end.
  • the helical blade has an outer diameter D.
  • the drilling machine 10 also comprises a displacement device (not illustrated here) for moving the auger 14 relative to the mast 12 in translation in the longitudinal direction L.
  • This displacement device is in particular actuated during the drilling step and to screw the auger into the ground, and during the step of extracting the auger from the ground.
  • the extraction of the auger from the ground which takes place after the drilling operation, consists of a vertical translation without rotation.
  • the drilling machine 10 also comprises a device 20 for cleaning the auger 14 , the function of which is to evacuate the cuttings lodged between the turns of the helical blade when extracting the auger.
  • the cleaning device 20 comprises a carriage 22 which has the general shape of a drum traversed axially by the auger 14.
  • the carriage 22 therefore has a diameter slightly larger than the diameter D of the helical blade 18.
  • the carriage 22 is mounted on the mast 12 in a sliding manner in the longitudinal direction L of the mast 12. To do this, in this non-limiting example, the carriage is mounted on slides fixed along the mast.
  • the carriage comprises a body 24 of cylindrical shape which surrounds the auger.
  • the body 24 is supported by a pair of hydraulic jacks 30 arranged between the mast and the carriage.
  • the cleaning device 20 further comprises a doctor blade 40 which is disposed below the body 24.
  • the doctor blade is mounted on an internal drum 26 of the cleaning device 20, the internal drum 26 being disposed coaxially inside the body 24.
  • the doctor blade extends between a lower turn 18a and an upper turn 18b of the helical blade 18 in order to remove the cuttings located between the two turns.
  • the doctor blade remains engaged between the two turns during the other movements of the auger, in particular during the drilling phases.
  • the doctor blade has the shape of a plate having a height H substantially equal to the axial distance between the lower turn 18a and the upper turn 18b.
  • the cleaning device 20 also comprises a motor 28 for rotating the inner drum 26 with the doctor blade 24 around the longitudinal axis A.
  • the doctor blade rotates around the axis of rotation A of the auger while extending between the lower coil 18a and the upper coil 18b, which makes it possible to evacuate the cuttings lodged between the lower coil and the upper coil. .
  • the doctor blade 40 is preferably mounted on the drum 26 in a pivoting manner so as to be able to release the doctor blade outside the volume of the auger when the auger is screwed into the ground during the drilling operation.
  • FIG. 1 On the figures 1 to 3 , there is shown a vertical Z axis which extends parallel to the longitudinal direction L of the mast and which is oriented towards an upper end 12a of the mast.
  • Reference Z 0 corresponds to the initial position of carriage 22 illustrated in figure 1 .
  • the auger is in the extraction phase without rotation, so that the vertical movement speed of the auger corresponds to the vertical extraction speed.
  • the initial speed of rotation ⁇ 0 of the doctor blade 40 around the axis of rotation A is set to be equal to V 0 / p where p is the pitch of the helical blade 18, so that the carriage does not does not move vertically when the extraction speed without auger rotation is equal to V 0 .
  • the carriage 22 will be driven by the auger in the longitudinal direction L, ie towards the upper end 12a of the mast 12 if the extraction speed of the auger V 1 is greater than the initial speed V 0 , as illustrated in figure 2 , or towards the lower end 12b of the mast 12 if the vertical extraction speed V 2 the auger is lower than the speed V 0 , as illustrated in figure 3 .
  • the drilling machine 10 further comprises a measuring member 50 for determining a displacement ⁇ Z of the carriage 22 along the mast with respect to the initial position Z 0 of the carriage.
  • ⁇ Z Z - Z 0
  • the measuring member 50 is disposed between the carriage 22 and the mast 12. It comprises the hydraulic cylinder 30, so that the movement of the carriage 22 is determined from the variation in the length. cylinder 30.
  • the jack 30 comprises a displacement sensor 52 which makes it possible to measure the value of the displacement of the carriage 22.
  • the cleaning device 20 further comprises a speed regulating device 54, shown diagrammatically in figure 4 to regulate the speed of rotation ⁇ of the doctor blade 40 as a function of the displacement ⁇ Z of the carriage determined by the measuring member.
  • the speed regulation device 54 is connected to the displacement sensor 52, and controls the motor 28 by supplying it with a speed setpoint ⁇ of the doctor blade.
  • the speed regulating device 54 is configured to modify the speed of rotation ⁇ of the doctor blade 40 as a function of the movement ⁇ Z of the carriage, so as to bring the carriage 22 back to the initial position Z 0 when a movement of the carriage relative to the initial position Z 0 .
  • the speed regulator 54 is configured to increase the speed of rotation ⁇ of the doctor blade 40 when the carriage 22 moves towards the upper end 12a of the mast 12.
  • the measuring device 50 has determined that the carriage 22 has moved by the distance ⁇ Z 1 towards the upper end 12a of the mast 12. Consequently, the speed regulating device 54 sends the speed setpoint ⁇ 1 to the motor 28 in order to increase the speed of rotation of the doctor blade 40.
  • the speed of rotation ⁇ 1 is strictly greater than the speed of rotation ⁇ 0 initial. We will explain below how the speed ⁇ 1 is determined .
  • the speed regulation device 54 is configured to decrease the speed of rotation ⁇ of the doctor blade 40 when the carriage moves towards the lower end 12b of the mast 12.
  • the measuring member 50 has determined that the carriage 22 has moved a distance ⁇ Z 2 from the initial position Z 0 towards the lower end 12b of the mast 12. Consequently, the speed regulating device 54 decreases the speed of rotation ⁇ of the doctor blade 40 to bring it to the speed of rotation ⁇ 2 lower than the speed of rotation ⁇ 0 initial.
  • the speed regulating device 54 is configured such that the speed of rotation ⁇ is a linear increasing function of the displacement ⁇ Z of the carriage along the mast.
  • the variation in speed of rotation ⁇ of the doctor blade 40 as a function of the position Z of the carriage 22 relative to its initial position Z 0 .
  • ⁇ ⁇ 0 + ⁇
  • the curve illustrated in figure 5 is an increasing linear function representing the speed variation as a function of the vertical displacement of the carriage with respect to Z 0 .
  • ⁇ k ⁇ (Z-Zo), where k is the coefficient of proportionality.
  • the pitch p of the blade is generally between 0.3 and 2 meters, and the ascent speed of the auger can vary between 50 and 200 meters per hour.
  • values of k make it possible to ensure that the speed of rotation of the doctor blade is adapted to stop the movement of the carriage 22 from its initial position Z 0 .
  • Other values of k may be chosen as a function of the pitch of the blade.
  • the device can also be configured so that the speed ⁇ 1 is sufficient to bring the carriage 22 back to the initial position Z 0 , this movement being illustrated by the arrow F1 of the figure 2 .
  • the variation in speed of rotation ⁇ 1 will be determined by choosing a coefficient k higher than those proposed above. It will be understood in particular that the carriage will return to its initial position if the extraction speed without rotation fluctuates around the value V 0 .
  • variation in speed of rotation ⁇ 2 can be calibrated so that the carriage 22 returns to its initial position Z 0 in the event of displacement of the carriage 22 towards the lower end 12b of the mast 12, this movement of the carriage being illustrated by arrow F2 on the figure 3 .
  • the doctor blade 40 is supported on the lower turn 18a of the helical blade 18.
  • the force exerted by the doctor blade 40 on the lower turn 18a is formed by the self-weight of the carriage.
  • the cleaning device further comprises a force regulating device 60, shown diagrammatically in figure 1 to regulate the force applied by the doctor blade 40 on the lower turn 18a.
  • This force regulation device 60 comprises the hydraulic cylinder 30 arranged between the carriage 22 and the mast 12.
  • the jack 30 therefore constitutes an actuator 31 which is arranged between the body and the mast, being configured to exert a thrust force T on the body 24.
  • This thrust force being, in this example, equal to a fraction of the weight of the carriage, in this case 50% of the weight of the carriage 22.
  • the thrust force T is directed in the longitudinal direction L of the mast towards the upper end of the mast 12.
  • this thrust force T makes it possible to reduce the vertical pressure force exerted by the doctor blade 40 on the lower turn 18a.
  • the hydraulic cylinder 30 is supplied at a constant hydraulic fluid pressure.
  • the measuring member 50 comprises the hydraulic cylinder 30 of the actuator 31.
  • the speed regulating device 54 is also able to regulate the speed of rotation of the doctor blade 40 during a phase of vertical extraction of the auger 14 with rotation, which whatever its direction of rotation.
  • the doctor blade speed control device 40 is also able to regulate the doctor blade speed during the drilling phase, that is to say during a downward vertical movement of the auger with rotation, corresponding to a screwing movement of the auger into the ground.
  • the regulating device is also able to regulate the speed of rotation of the doctor blade 40 during a rotation of the auger, without vertical displacement of the latter, in order to correct a displacement of the carriage 22 which could result from a variation of the auger. auger rotation speed 14.

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  • Mechanical Engineering (AREA)
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Description

Arrière-plan de l'inventionBackground of the invention

La présente invention porte sur le domaine du nettoyage d'une tarière de machine de forage, une telle machine étant généralement utilisée pour réaliser des pieux dans un sol.The present invention relates to the field of cleaning a drilling machine auger, such a machine being generally used for making piles in soil.

De façon connue, une tarière est un outil de forage formé d'une pale hélicoïdale qui est généralement enroulée autour d'une tige axiale tubulaire.In known manner, an auger is a drilling tool formed of a helical blade which is generally wound around a tubular axial rod.

Traditionnellement, la tarière est vissée dans le sol jusqu'à la profondeur souhaitée. Du béton sous pression est ensuite injecté par la tige axiale sous la tarière, ce qui a pour effet de déplacer progressivement la tarière vers le haut.Traditionally, the auger is screwed into the ground to the desired depth. Concrete under pressure is then injected by the axial rod under the auger, which has the effect of gradually moving the auger upwards.

Cette opération présente ainsi l'avantage de réaliser simultanément le bétonnage du pieu, d'éviter l'effondrement des parois du forage lors de l'extraction de la tarière, et de réduire la force de traction nécessaire pour extraire la tarière.This operation thus has the advantage of simultaneously carrying out the concreting of the pile, of avoiding the collapse of the walls of the borehole during the extraction of the auger, and of reducing the traction force necessary to extract the auger.

L'extraction de la tarière s'effectue généralement sans rotation de cette dernière, et ce afin d'éviter de créer des défauts dans le pieu à réaliser. Certaines extractions s'accompagnent toutefois d'une mise en rotation de la tarière, par exemple dans le cadre de la fabrication de pieux à ergots.The extraction of the auger is generally carried out without rotation of the latter, in order to avoid creating defects in the pile to be produced. However, certain extractions are accompanied by a rotation of the auger, for example in the context of the manufacture of lug piles.

Lors de l'extraction sans rotation de la tarière, les déblais sont remontés entre les spires de la tarière où ils restent très souvent collés, même après leur sortie à l'extérieur du forage.During the extraction without rotation of the auger, the cuttings are raised between the turns of the auger where they very often remain stuck, even after their exit outside the borehole.

Il est donc nécessaire de nettoyer la tarière au fur et à mesure de son extraction. Ce nettoyage doit d'une part pouvoir être le plus rapide possible afin d'éviter de ralentir l'extraction de la tarière, et d'autre part être assez efficace pour qu'aucun déblais ne restent collés entre les spires et ne retombent ultérieurement du haut de la tarière, ce qui pourrait blesser un opérateur se trouvant à proximité.It is therefore necessary to clean the auger as it is removed. This cleaning must on the one hand be able to be as fast as possible in order to avoid slowing down the extraction of the auger, and on the other hand be effective enough so that no cuttings remain stuck between the turns and subsequently fall out of the auger. top of the auger, which could injure an operator nearby.

On connait des machines de forage munies de dispositifs de nettoyage permettant d'évacuer les déblais logés entre les spires de la tarière. Parmi les différents dispositifs de nettoyage, certains comportent une racle rotative qui s'insère entre deux spires adjacentes de la tarière, la racle tournant autour de la tarière pendant la remontée, sans rotation, de cette dernière.Drilling machines are known fitted with cleaning devices making it possible to remove the cuttings lodged between the turns of the auger. Among the various cleaning devices, some include a rotating doctor blade that fits between two adjacent turns of the auger, the doctor blade rotating around the auger during the ascent, without rotation, of the latter.

L'invention porte plus précisément sur une telle machine de forage comportant :

  • un mât ayant une direction longitudinale ;
  • une tarière ayant un axe longitudinal parallèle à la direction longitudinale et comprenant une pale hélicoïdale ;
  • un dispositif de déplacement pour déplacer la tarière par rapport au mât en translation selon la direction longitudinale ;
  • un dispositif de nettoyage de la tarière comprenant un chariot monté au mât de façon coulissante selon la direction longitudinale du mât, le chariot comportant un corps entourant la tarière et une racle montée au corps de façon rotative autour d'un axe de rotation parallèle à la direction longitudinale, la racle s'étendant entre une spire inférieure et une spire supérieure de la pale hélicoïdale.
The invention relates more precisely to such a drilling machine comprising:
  • a mast having a longitudinal direction;
  • an auger having a longitudinal axis parallel to the longitudinal direction and comprising a helical blade;
  • a displacement device for moving the auger relative to the mast in translation in the longitudinal direction;
  • a device for cleaning the auger comprising a carriage mounted to the mast in a sliding manner in the longitudinal direction of the mast, the carriage comprising a body surrounding the auger and a doctor blade mounted to the body so as to rotate about an axis of rotation parallel to the longitudinal direction, the doctor blade extending between a lower turn and an upper turn of the helical blade.

Une telle machine de forage est notamment décrite dans les documents FR 2563861 ou EP2749729 . Dans ces documents, la lame racleuse est montée sur un organe tournant à la vitesse désirée autour de la tarière, ledit organe étant supporté par un bâti susceptible de coulisser de haut en bas et de bas en haut le long du mât porteur auquel est suspendue la tarière.Such a drilling machine is described in particular in the documents FR 2563861 or EP2749729 . In these documents, the scraper blade is mounted on a member rotating at the desired speed around the auger, said member being supported by a frame capable of sliding from top to bottom and from bottom to top along the carrying mast from which the post is suspended. auger.

Ce coulissement du bâti a lieu en cas de manque de synchronisme entre la vitesse de rotation de la lame racleuse et la vitesse verticale d'extraction de la tarière. Ce manque de synchronisme a pour effet de déplacer en translation la lame racleuse, et donc le bâti, le long du mât.This sliding of the frame takes place in the event of a lack of synchronism between the rotational speed of the scraper blade and the vertical extraction speed of the auger. This lack of synchronism has the effect of moving the scraper blade, and therefore the frame, in translation along the mast.

Aussi, en cas d'augmentation de la vitesse d'extraction de la tarière, le bâti se déplacera vers l'extrémité supérieure du mât, tandis que, inversement, en cas de diminution de la vitesse d'extraction de la tarière, le bâti se déplacera vers l'extrémité inférieure du mât.Also, if the auger extraction speed increases, the frame will move towards the upper end of the mast, while, conversely, if the auger extraction speed decreases, the frame will move to the lower end of the mast.

Généralement, des butées supérieure et inférieure sont prévues pour empêcher que le bâti coulissant ne soit emmené par la tarière à l'une ou l'autre des extrémités supérieure et inférieure du mât.Generally, upper and lower stops are provided to prevent the sliding frame from being taken by the auger to either the upper and lower ends of the mast.

En cas de modification importante de la vitesse d'extraction de la tarière, le bâti risque de venir taper contre les butées et de s'endommager. On risque également de casser la lame racleuse si la vitesse d'extraction de la tarière continue à augmenter (resp. diminuer) alors que le bâti est en butée contre la butée supérieure (resp. inférieure).If the auger extraction speed changes significantly, there is a risk that the frame will hit against the stops and be damaged. There is also a risk of breaking the scraper blade if the auger extraction speed continues to increase (resp. Decrease) while the frame is in abutment against the upper (resp. Lower) stop.

Un autre inconvénient de l'art antérieur est que les dispositifs de nettoyage à racle existants nécessitent d'être engagés manuellement entre deux spires avant le bétonnage, puis dégagés de la tarière avant le forage suivant. Ces interventions humaines au pied de la tarière sont potentiellement dangereuses.Another drawback of the prior art is that the existing scraper cleaning devices need to be engaged manually between two turns before concreting, then released from the auger before the next drilling. These human interventions at the bottom of the auger are potentially dangerous.

Objet et résumé de l'inventionPurpose and summary of the invention

Un but de la présente invention est de remédier à ces inconvénients.An aim of the present invention is to remedy these drawbacks.

L'invention atteint son but par le fait que la machine de forage comporte en outre un organe de mesure pour déterminer le déplacement du chariot le long du mât par rapport à une position initiale dudit chariot, et le dispositif de nettoyage comporte en outre un dispositif de régulation de vitesse pour réguler la vitesse de rotation de la racle en fonction dudit déplacement du chariot.The invention achieves its object by the fact that the drilling machine further comprises a measuring member for determining the movement of the carriage along the mast relative to an initial position of said carriage, and the cleaning device further comprises a device speed regulator to regulate the speed of rotation of the doctor blade as a function of said carriage movement.

On comprend que la régulation de vitesse de rotation de la racle de la machine selon l'invention dépend du déplacement du chariot, si bien que la régulation de la vitesse de la racle peut être réalisée lors des différentes phases de fabrication du pieu.It will be understood that the regulation of the speed of rotation of the doctor blade of the machine according to the invention depends on the movement of the carriage, so that the speed control of the doctor blade can be carried out during the various phases of manufacture of the pile.

Notamment, la régulation de vitesse de la racle peut être réalisée lors :

  • d'une phase de forage de la tarière, la tarière se déplaçant verticalement dans le sol tout en tournant sur elle-même selon un mouvement de vissage ;
  • d'une phase de remontée, généralement avec bétonnage, au cours de laquelle on réalise une extraction verticale de la tarière, sans ou avec rotation de la tarière ;
  • d'une phase de rotation de la tarière sans déplacement vertical.
In particular, the speed of the doctor blade can be regulated when:
  • a phase of drilling the auger, the auger moving vertically in the ground while rotating on itself in a screwing movement;
  • a lifting phase, generally with concreting, during which a vertical extraction of the auger is carried out, without or with rotation of the auger;
  • a phase of rotation of the auger without vertical displacement.

La régulation de la vitesse de rotation de la racle permet de corriger la position verticale du chariot. Cette régulation de vitesse est préférentiellement réalisée en temps réel de manière à maintenir le chariot en une position verticale prédéterminée, par exemple la position initiale du chariot, ou à tout le moins dans une zone définie entre deux positions verticales prédéterminées, par exemple une zone centrée sur la position initiale du chariot, et ce quelle que soit la phase de réalisation du pieu.Regulating the speed of rotation of the doctor blade corrects the vertical position of the carriage. This speed regulation is preferably carried out in real time so as to maintain the carriage in a predetermined vertical position, for example the initial position of the carriage, or at the very least in an area defined between two predetermined vertical positions, for example a centered area. on the initial position of the carriage, regardless of the pile construction phase.

En conséquence, l'invention permet d'éviter un endommagement de la racle, grâce à la maîtrise de la position verticale du chariot, et également d'éviter une intervention humaine au niveau du chariot potentiellement dangereuse grâce au fait que la racle peut rester engagée entre les spires pendant toute la durée des opérations.Consequently, the invention makes it possible to prevent damage to the doctor blade, thanks to the control of the vertical position of the carriage, and also to avoid potentially dangerous human intervention at the level of the carriage thanks to the fact that the doctor blade can remain engaged. between the turns throughout the operations.

Selon un mode de mise en œuvre de l'invention, en fonctionnement du dispositif de nettoyage lors d'une phase de bétonnage, le chariot est en position initiale, et la tarière est extraite du sol à une vitesse d'extraction verticale initiale prédéterminée et constante. Dans les conditions normales de fonctionnement, la racle présente une vitesse de rotation déterminée de telle sorte que la racle effectue un tour complet autour de la tarière lorsque cette dernière a avancé d'un pas de la pale hélicoïdale. Dans ces conditions, le chariot ne bouge pas.According to one embodiment of the invention, in operation of the cleaning device during a concreting phase, the carriage is in the initial position, and the auger is extracted from the ground at a predetermined initial vertical extraction speed and constant. Under normal operating conditions, the doctor blade has a determined rotational speed such that the doctor blade makes one complete revolution around the auger when the latter has advanced one pitch of the helical blade. Under these conditions, the carriage does not move.

Cependant, la vitesse d'extraction de la tarière n'est pas nécessairement constante.However, the speed of extraction of the auger is not necessarily constant.

En cas de diminution de la vitesse d'extraction verticale de la tarière, par exemple due à une résistance du terrain ou bien à une baisse de la pression d'injection du béton, on comprend que, à l'issue d'une rotation de 360° autour de la tarière entre les spires inférieure et supérieure, la tarière s'est déplacée longitudinalement d'une longueur inférieure à un pas de la pale. Il s'ensuit que la racle se déplace longitudinalement vers l'extrémité inférieure du mât, entraînant le déplacement du chariot par rapport à sa position initiale vers l'extrémité inférieure du mât.In the event of a decrease in the vertical extraction speed of the auger, for example due to resistance from the ground or to a drop in the injection pressure of the concrete, it is understood that, at the end of a rotation of 360 ° around the auger between the lower and upper turns, the auger has moved longitudinally a length less than one pitch of the blade. It follows that the doctor blade moves longitudinally towards the lower end of the mast, causing the carriage to move relative to its initial position towards the lower end of the mast.

Selon l'invention, le déplacement du chariot vers l'extrémité inférieure est déterminé par l'organe de mesure et la vitesse de rotation de la racle est régulée en fonction de ce déplacement du chariot. Dans ce cas, la vitesse de rotation de la racle est diminuée, par exemple de manière à stopper ou à tout le moins ralentir le déplacement vertical du chariot vers l'extrémité inférieure du mât. Grâce à cette régulation de vitesse de rotation de la racle, on évite que le chariot n'atteigne l'extrémité inférieure du mât ou une éventuelle butée inférieure, ce qui pourrait provoquer un endommagement de la racle.According to the invention, the movement of the carriage towards the lower end is determined by the measuring member and the speed of rotation of the doctor blade is regulated as a function of this movement of the carriage. In this case, the speed of rotation of the doctor blade is reduced, for example so as to stop or at the very least slow down the vertical movement of the carriage towards the lower end of the mast. By virtue of this regulation of the speed of rotation of the doctor blade, it is possible to prevent the carriage from reaching the lower end of the mast or any lower stopper, which could cause damage to the doctor blade.

Inversement, en cas d'augmentation de la vitesse d'extraction verticale de la tarière, par exemple due à une augmentation de la pression d'injection du béton, on comprend que, à l'issue d'une rotation de 360° de la racle autour de la tarière entre les spires inférieure et supérieure, la tarière a avancé de plus d'un pas de sorte que la racle est entraînée par la tarière vers l'extrémité supérieure du mât. Il s'ensuit que le chariot est également entrainé par la tarière vers l'extrémité supérieure du mât. Le chariot se déplace alors par rapport à sa position initiale en se dirigeant vers l'extrémité supérieure mât.Conversely, in the event of an increase in the vertical extraction speed of the auger, for example due to an increase in the injection pressure of the concrete, it is understood that, at the end of a 360 ° rotation of With the doctor blade around the auger between the lower and upper turns, the auger has advanced more than one step so that the doctor blade is driven by the auger towards the upper end of the mast. It follows that the carriage is also driven by the auger towards the upper end of the mast. The carriage then moves relative to its initial position by moving towards the upper mast end.

Selon l'invention, le déplacement du chariot est déterminé par l'organe de mesure et la vitesse de rotation de la racle est régulée en fonction du déplacement du chariot. Dans ce cas, la vitesse de rotation de la racle est augmentée, par exemple de manière à stopper ou ralentir le déplacement vertical du chariot vers l'extrémité supérieure du mât. Grâce à cette régulation de vitesse, on évite que le chariot n'atteigne l'extrémité supérieure du mât ou une éventuelle butée supérieure, ce qui pourrait provoquer un endommagement de la racle.According to the invention, the movement of the carriage is determined by the measuring member and the speed of rotation of the doctor blade is regulated as a function of the movement of the carriage. In this case, the speed of rotation of the doctor blade is increased, for example so as to stop or slow down the vertical movement of the carriage towards the upper end of the mast. Thanks to this speed regulation, it is possible to prevent the carriage from reaching the upper end of the mast or any upper stopper, which could cause damage to the doctor blade.

Par « détermination du déplacement du chariot par rapport à sa position initiale», on entend que l'organe de mesure est configuré pour mesurer le déplacement du chariot par rapport à sa position initiale, ou à tout le moins détecter un déplacement du chariot vers l'extrémité supérieure ou l'extrémité inférieure du mât.By "determination of the movement of the carriage relative to its initial position" is meant that the measuring member is configured to measure the movement of the carriage relative to its initial position, or at the very least to detect a movement of the carriage towards the end. upper end or lower end of the mast.

Selon un mode de réalisation préférentiel, le dispositif de régulation de vitesse est configuré pour modifier la vitesse de rotation de la racle en fonction du déplacement du chariot par rapport à la position initiale, de façon à ramener le chariot vers la position initiale lors d'un déplacement du chariot par rapport à la position initiale.According to a preferred embodiment, the speed regulating device is configured to modify the speed of rotation of the doctor blade as a function of the movement of the carriage relative to the initial position, so as to bring the carriage back to the initial position during a movement of the carriage relative to the initial position.

Selon une variante, le dispositif de régulation de vitesse est configuré pour modifier la vitesse de rotation de la racle en fonction du déplacement du chariot par rapport à la position initiale, de façon à ramener le chariot dans une zone située autour de la position initiale lors d'un déplacement du chariot hors de ladite zone.According to one variant, the speed regulating device is configured to modify the speed of rotation of the doctor blade as a function of the movement of the carriage relative to the initial position, so as to bring the carriage back to a zone situated around the initial position during a movement of the carriage out of said zone.

Le dispositif de régulation de vitesse permet donc de maintenir le chariot sensiblement dans sa position initiale, quelles que soient les variations, positives ou négatives, de la vitesse d'extraction verticale de la tarière. On s'assure ainsi que le chariot reste toujours éloigné des éventuelles butées inférieure et supérieure.The speed regulation device therefore makes it possible to maintain the carriage substantially in its initial position, whatever the variations, positive or negative, of the vertical extraction speed of the auger. This ensures that the carriage always remains away from any lower and upper stops.

Avantageusement, le dispositif de régulation de vitesse est configuré pour augmenter la vitesse de rotation de la racle lorsque le chariot se déplace vers une extrémité supérieure du mât. On comprend que, selon son amplitude, l'augmentation de la vitesse de rotation de la racle a pour effet de ralentir ou stopper le déplacement du chariot vers l'extrémité supérieure, voire d'entrainer le chariot vers l'extrémité inférieure du mât si la vitesse de rotation de la racle est supérieure au ratio vitesse d'extraction sur pas de la pale hélicoïdale. Cette augmentation de vitesse de rotation de la racle est préférentiellement initiée lorsque le déplacement du chariot, tel que déterminé par l'organe de mesure, est supérieur à un premier seuil prédéterminé.Advantageously, the speed regulating device is configured to increase the speed of rotation of the doctor blade when the trolley moves to an upper end of the mast. It is understood that, depending on its amplitude, the increase in the speed of rotation of the doctor blade has the effect of slowing down or stopping the movement of the carriage towards the upper end, or even of driving the carriage towards the lower end of the mast if the speed of rotation of the doctor blade is greater than the ratio of extraction speed to pitch of the helical blade. This increase in the speed of rotation of the doctor blade is preferably initiated when the movement of the carriage, as determined by the measuring member, is greater than a first predetermined threshold.

Avantageusement, le dispositif de régulation de vitesse est configuré pour diminuer la vitesse de rotation de la racle lorsque le chariot se déplace vers une extrémité inférieure du mât. On comprend que, selon son amplitude, la diminution de la vitesse de rotation de la racle a pour effet de ralentir ou stopper le déplacement du chariot vers l'extrémité inférieure du mât, voire de déplacer le chariot vers l'extrémité supérieure du mât si la vitesse de rotation de la racle est inférieure au ratio vitesse d'extraction sur pas de la pale hélicoïdale.Advantageously, the speed regulation device is configured to reduce the speed of rotation of the doctor blade when the carriage moves towards a lower end of the mast. It is understood that, depending on its amplitude, the reduction in the speed of rotation of the doctor blade has the effect of slowing down or stopping the movement of the carriage towards the lower end of the mast, or even of moving the carriage towards the upper end of the mast if the speed of rotation of the doctor blade is less than the ratio of extraction speed to pitch of the helical blade.

Cette diminution de vitesse de rotation de la racle peut être initiée lorsque le déplacement du chariot, tel que déterminé par l'organe de mesure, est supérieur à un second seuil prédéterminé.This reduction in the speed of rotation of the doctor blade can be initiated when the movement of the carriage, as determined by the measuring member, is greater than a second predetermined threshold.

Avantageusement, mais non exclusivement, le dispositif de régulation de vitesse est configuré de sorte que la valeur de la vitesse de rotation de la racle soit fonction de la valeur du déplacement du chariot déterminée par l'organe de mesure.Advantageously, but not exclusively, the speed regulating device is configured so that the value of the speed of rotation of the doctor blade is a function of the value of the displacement of the carriage determined by the measuring member.

Avantageusement, la vitesse de rotation de la racle est une fonction croissante de la valeur de déplacement du chariot, considéré à partir de la position initiale vers l'extrémité supérieure du mât. Autrement dit, la vitesse de rotation de la racle augmente de plus en plus à mesure que le chariot se rapproche de l'extrémité supérieure du mât. Inversement, la vitesse de rotation de la racle diminue de plus en plus à mesure que le chariot se rapproche de l'extrémité inférieure du mât.Advantageously, the speed of rotation of the doctor blade is an increasing function of the value of displacement of the carriage, considered from the initial position towards the upper end of the mast. In other words, the speed of rotation of the doctor blade increases more and more as the carriage approaches the upper end of the mast. Conversely, the speed of rotation of the doctor blade decreases more and more as the carriage approaches the lower end of the mast.

Encore de préférence, le dispositif de régulation de vitesse est configuré de telle sorte que la vitesse de rotation de la racle soit une fonction croissante linéaire du déplacement du chariot le long du mât.More preferably, the speed control device is configured such that the speed of rotation of the doctor blade is a linearly increasing function of the movement of the carriage along the mast.

Avantageusement, ledit organe de mesure est disposé entre le chariot et le mât.Advantageously, said measuring member is arranged between the carriage and the mast.

De préférence, l'organe de mesure comporte au moins un vérin disposé entre le corps et le mât, le déplacement du chariot étant déterminé à partir de la variation de longueur du vérin.Preferably, the measuring member comprises at least one jack arranged between the body and the mast, the movement of the carriage being determined from the variation in length of the jack.

De préférence, l'organe de mesure comporte un capteur de déplacement intégré au vérin.Preferably, the measuring member comprises a displacement sensor integrated into the jack.

De préférence, le vérin est un vérin hydraulique.Preferably, the jack is a hydraulic jack.

On comprend par ailleurs que les fins de course haute et basse du vérin constituent des butées inférieure et supérieure pour le chariot.It will also be understood that the upper and lower limit switches of the cylinder constitute lower and upper stops for the carriage.

Le poids du dispositif de nettoyage de tarière étant croissant avec l'augmentation des diamètres des tarières, la racle, qui prend généralement appui sur la spire inférieure, subit des efforts importants susceptibles de l'endommager sérieusement.As the weight of the auger cleaning device increases with the increase in the diameters of the augers, the doctor blade, which generally bears on the lower coil, is subjected to significant forces liable to seriously damage it.

Pour résoudre ce problème, selon un autre aspect avantageux de l'invention, le dispositif de nettoyage comporte en outre un dispositif de régulation de force pour réguler la force appliquée par la racle sur la spire inférieure. Avantageusement, le dispositif de régulation de force est configuré pour exercer sur le chariot une force de portance contrecarrant au moins en partie le poids du chariot, de façon à réduire la force exercée par la racle sur la spire inférieure tout en s'assurant que la racle reste en appui contre la spire inférieure. Autrement dit, le module de la force de portance est égal à une fraction du poids du chariot.To solve this problem, according to another advantageous aspect of the invention, the cleaning device further comprises a force regulating device for regulating the force applied by the doctor blade on the lower turn. Advantageously, the force regulating device is configured to exert on the carriage a lifting force counteracting at least in part the weight of the carriage, so as to reduce the force exerted by the doctor blade on the lower coil while ensuring that the doctor blade remains in contact with the lower coil. In other words, the modulus of the lifting force is equal to a fraction of the weight of the carriage.

Selon un mode de réalisation avantageux, le dispositif de régulation de force est disposé entre le chariot et le mât.According to an advantageous embodiment, the force regulation device is arranged between the carriage and the mast.

De préférence, le dispositif de régulation de force comporte au moins un actionneur disposé entre le corps et le mât, l'actionneur étant configuré pour exercer un effort de poussée sur le corps, ledit effort de poussée étant dirigé selon la direction longitudinale du mât, vers une extrémité supérieure du mât.Preferably, the force regulating device comprises at least one actuator arranged between the body and the mast, the actuator being configured to exert a thrust force on the body, said thrust force being directed in the longitudinal direction of the mast, towards an upper end of the mast.

De préférence, l'actionneur comporte un vérin hydraulique.Preferably, the actuator comprises a hydraulic cylinder.

Encore de préférence, le vérin hydraulique est alimenté à une pression de fluide hydraulique constante.More preferably, the hydraulic cylinder is supplied at a constant hydraulic fluid pressure.

De manière préférentielle, l'organe de mesure comporte le vérin hydraulique de l'actionneur. Autrement dit, le vérin hydraulique disposé entre le mât et le chariot présente une double fonction avantageuse, à savoir déterminer le déplacement du chariot et réduire l'effort exercé par la racle sur la spire inférieure de la pale hélicoïdale de la tarière.Preferably, the measuring member comprises the hydraulic cylinder of the actuator. In other words, the hydraulic cylinder arranged between the mast and the carriage has an advantageous dual function, namely to determine the displacement of the carriage and to reduce the force exerted by the doctor blade on the lower turn of the helical blade of the auger.

Brève description des dessinsBrief description of the drawings

L'invention sera mieux comprise à la lecture de la description qui suit d'un mode de réalisation de l'invention donné à titre d'exemple non limitatif, en référence aux dessins annexés, sur lesquels :

  • la figure 1 est une vue en perspective d'une machine de forage, conforme à l'invention, le chariot du dispositif de nettoyage étant en position initiale ;
  • la figure 2 illustre la machine de forage de la figure 1 , le chariot étant en position haute ;
  • la figure 3 illustre la machine de forage de la figure 1 , le chariot étant en position basse ;
  • la figure 4 illustre la machine de forage de la figure 1 ainsi que son dispositif de régulation de vitesse de la racle ; et
  • la figure 5 est un graphique illustrant la variation de la vitesse de rotation de racle en fonction du déplacement du chariot le long du mât.
The invention will be better understood on reading the following description of an embodiment of the invention given by way of non-limiting example, with reference to the appended drawings, in which:
  • the figure 1 is a perspective view of a drilling machine according to the invention, the carriage of the cleaning device being in the initial position;
  • the figure 2 illustrates the drilling machine of the figure 1 , the carriage being in the high position;
  • the figure 3 illustrates the drilling machine of the figure 1 , the carriage being in the low position;
  • the figure 4 illustrates the drilling machine of the figure 1 as well as its device for regulating the speed of the doctor blade; and
  • the figure 5 is a graph illustrating the variation of the speed of rotation of the doctor blade as a function of the movement of the carriage along the mast.

Description détaillée de l'inventionDetailed description of the invention

Sur les figures 1 à 4 , on a illustré, de manière partielle, une machine de forage 10 conforme à la présente invention.On the figures 1 to 4 , there is partially illustrated a drilling machine 10 according to the present invention.

La machine de forage 10 est destinée à réaliser des forages, et notamment des pieux dans le sol. Ce type de machine de forage à tarière étant déjà connu par ailleurs, seuls les éléments nécessaires à la compréhension de l'invention seront décrits ici.The drilling machine 10 is intended for drilling, and in particular piles in the ground. As this type of auger drilling machine is already known elsewhere, only the elements necessary for understanding the invention will be described here.

On pourra également se référer au document FR 2 563 861 qui décrit un exemple d'une telle machine de forage.We can also refer to the document FR 2,563,861 which describes an example of such a drilling machine.

La machine de forage 10 comporte un mât 12 qui présente une direction longitudinale L ; dans cet exemple, la direction longitudinale L est verticale.The drilling machine 10 comprises a mast 12 which has a longitudinal direction L ; in this example, the longitudinal direction L is vertical.

La machine de forage 10 comporte par ailleurs une tarière 14 ayant un axe longitudinal A parallèle à la direction longitudinale L. The drilling machine 10 also comprises an auger 14 having a longitudinal axis A parallel to the longitudinal direction L.

La tarière 14 comprend un tube creux 16 qui s'étend selon l'axe longitudinal A, ce tube étant fixé à et entouré par une pale hélicoïdale 18. The auger 14 comprises a hollow tube 16 which extends along the longitudinal axis A, this tube being fixed to and surrounded by a helical blade 18.

Par souci de lisibilité, seule une portion de tarière est représentée en figures 1 à 4 . Bien entendu, la tarière peut être composée de plusieurs portions fixées bout à bout.For the sake of readability, only a portion of the auger is shown in figures 1 to 4 . Of course, the auger can be composed of several portions fixed end to end.

La pale hélicoïdale présente un diamètre extérieur D. The helical blade has an outer diameter D.

De façon connue par ailleurs, la machine de forage 10 comporte également un dispositif de déplacement (non illustré ici) pour déplacer la tarière 14 par rapport au mât 12 en translation selon la direction longitudinale L. In a manner known elsewhere, the drilling machine 10 also comprises a displacement device (not illustrated here) for moving the auger 14 relative to the mast 12 in translation in the longitudinal direction L.

Ce dispositif de déplacement est notamment actionné lors de l'étape de forage et pour visser la tarière dans le sol, et lors de l'étape d'extraction de la tarière hors du sol. Comme mentionné ci-dessus, l'extraction de la tarière hors du sol, qui intervient après l'opération de forage, consiste en une translation verticale sans rotation.This displacement device is in particular actuated during the drilling step and to screw the auger into the ground, and during the step of extracting the auger from the ground. As mentioned above, the extraction of the auger from the ground, which takes place after the drilling operation, consists of a vertical translation without rotation.

Dans la suite de la description, la vitesse de déplacement vertical de la tarière sera notée V. La machine de forage 10 comporte par ailleurs un dispositif de nettoyage 20 de la tarière 14 dont la fonction est d'évacuer les déblais logés entre les spires de la pale hélicoïdale lors de l'extraction de la tarière.In the remainder of the description, the speed of vertical movement of the auger will be denoted V. The drilling machine 10 also comprises a device 20 for cleaning the auger 14 , the function of which is to evacuate the cuttings lodged between the turns of the helical blade when extracting the auger.

Le dispositif de nettoyage 20 comporte un chariot 22 qui présente la forme générale d'un tambour traversé axialement par la tarière 14. Le chariot 22 présente donc un diamètre légèrement plus grand que le diamètre D de la pale hélicoïdale 18. The cleaning device 20 comprises a carriage 22 which has the general shape of a drum traversed axially by the auger 14. The carriage 22 therefore has a diameter slightly larger than the diameter D of the helical blade 18.

Le chariot 22 est monté au mât 12 de façon coulissante selon la direction longitudinale L du mât 12. Pour ce faire, dans cet exemple non limitatif, le chariot est monté sur des glissières fixées le long du mât.The carriage 22 is mounted on the mast 12 in a sliding manner in the longitudinal direction L of the mast 12. To do this, in this non-limiting example, the carriage is mounted on slides fixed along the mast.

Le chariot comporte un corps 24 de forme cylindrique qui entoure la tarière.The carriage comprises a body 24 of cylindrical shape which surrounds the auger.

Comme il sera expliqué plus en détaillé ci-dessous, le corps 24 est supporté par une paire de vérins hydrauliques 30 disposés entre le mât et le chariot.As will be explained in more detail below, the body 24 is supported by a pair of hydraulic jacks 30 arranged between the mast and the carriage.

Le dispositif de nettoyage 20 comporte par ailleurs une racle 40 qui est disposée en dessous du corps 24. La racle est montée sur un tambour interne 26 du dispositif de nettoyage 20, le tambour interne 26 étant disposé coaxialement à l'intérieur du corps 24. Lors de l'extraction sans rotation, la racle s'étend entre une spire inférieure 18a et une spire supérieure 18b de la pale hélicoïdale 18 afin d'évacuer les déblais se trouvant entre les deux spires. Dans cet exemple avantageux, la racle reste engagée entre les deux spires pendant les autres mouvements de la tarière, notamment pendant les phases de forage.The cleaning device 20 further comprises a doctor blade 40 which is disposed below the body 24. The doctor blade is mounted on an internal drum 26 of the cleaning device 20, the internal drum 26 being disposed coaxially inside the body 24. During extraction without rotation, the doctor blade extends between a lower turn 18a and an upper turn 18b of the helical blade 18 in order to remove the cuttings located between the two turns. In this advantageous example, the doctor blade remains engaged between the two turns during the other movements of the auger, in particular during the drilling phases.

Dans cet exemple, la racle présente la forme d'une plaque ayant une hauteur H sensiblement égale à la distance axiale entre la spire inférieure 18a et la spire supérieure 18b. In this example, the doctor blade has the shape of a plate having a height H substantially equal to the axial distance between the lower turn 18a and the upper turn 18b.

Le dispositif de nettoyage 20 comporte par ailleurs un moteur 28 pour entraîner en rotation le tambour intérieur 26 avec la racle 24 autour de l'axe longitudinal A. The cleaning device 20 also comprises a motor 28 for rotating the inner drum 26 with the doctor blade 24 around the longitudinal axis A.

On comprend que l'actionnement du moteur 28 a pour effet de faire tourner la racle 40 par rapport au corps 24 autour du tube creux.It is understood that the actuation of the motor 28 has the effect of rotating the doctor blade 40 relative to the body 24 around the hollow tube.

En conséquence, la racle tourne autour de l'axe de rotation A de la tarière tout en s'étendant entre la spire inférieure 18a et la spire supérieure 18b, ce qui permet d'évacuer les déblais logés entre la spire inférieure et la spire supérieure.As a result, the doctor blade rotates around the axis of rotation A of the auger while extending between the lower coil 18a and the upper coil 18b, which makes it possible to evacuate the cuttings lodged between the lower coil and the upper coil. .

La racle 40 est préférentiellement montée sur le tambour 26 de manière pivotante de manière à pouvoir dégager la racle à l'extérieur du volume de la tarière lorsqu'on visse la tarière dans le sol lors de l'opération de forage.The doctor blade 40 is preferably mounted on the drum 26 in a pivoting manner so as to be able to release the doctor blade outside the volume of the auger when the auger is screwed into the ground during the drilling operation.

Sur les figures 1 à 3 , on a représenté un axe Z vertical qui s'étend parallèlement à la direction longitudinale L du mât et qui est orienté vers une extrémité supérieure 12a du mât. La référence Z0 correspond à la position initiale du chariot 22 illustrée en figure 1 . On the figures 1 to 3 , there is shown a vertical Z axis which extends parallel to the longitudinal direction L of the mast and which is oriented towards an upper end 12a of the mast. Reference Z 0 corresponds to the initial position of carriage 22 illustrated in figure 1 .

Sur ces figures, qui illustrent un mode de mise en œuvre non limitatif de l'invention, à savoir une phase de bétonnage, la tarière est en phase d'extraction sans rotation, de sorte que la vitesse de déplacement verticale de la tarière correspond à la vitesse d'extraction verticale.In these figures, which illustrate a non-limiting embodiment of the invention, namely a concreting phase, the auger is in the extraction phase without rotation, so that the vertical movement speed of the auger corresponds to the vertical extraction speed.

En condition normale d'extraction sans rotation, la vitesse d'extraction verticale de la tarière est égale à V0 , le chariot 22 se trouvant alors en sa position initiale Z0 .In normal extraction condition without rotation, the vertical extraction speed of the auger is equal to V 0 , the carriage 22 then being in its initial position Z 0 .

Dans cet exemple, la vitesse de rotation ω0 initiale de la racle 40 autour de l'axe de rotation A est réglée pour être égale à V0 /p où p est le pas de la pale hélicoïdale 18, de sorte que le chariot ne bouge pas verticalement lorsque la vitesse d'extraction sans rotation de la tarière est égale à V0 . Comme expliqué ci-dessus, si la vitesse V d'extraction verticale sans rotation de la tarière varie par rapport à sa vitesse initiale V0 , le chariot 22 sera entraîné par la tarière selon la direction longitudinale L, soit vers l'extrémité supérieure 12a du mât 12 si la vitesse d'extraction de la tarière V1 est supérieure à la vitesse initiale V0 , tel que cela est illustré en figure 2 , soit vers l'extrémité inférieure 12b du mât 12 si la vitesse d'extraction verticale V2 la tarière est inférieure à la vitesse V0 , tel qu'illustré en figure 3 . In this example, the initial speed of rotation ω 0 of the doctor blade 40 around the axis of rotation A is set to be equal to V 0 / p where p is the pitch of the helical blade 18, so that the carriage does not does not move vertically when the extraction speed without auger rotation is equal to V 0 . As explained above, if the vertical extraction speed V without rotation of the auger varies with respect to its initial speed V 0 , the carriage 22 will be driven by the auger in the longitudinal direction L, ie towards the upper end 12a of the mast 12 if the extraction speed of the auger V 1 is greater than the initial speed V 0 , as illustrated in figure 2 , or towards the lower end 12b of the mast 12 if the vertical extraction speed V 2 the auger is lower than the speed V 0 , as illustrated in figure 3 .

Conformément à l'invention, la machine de forage 10 comporte en outre un organe de mesure 50 pour déterminer un déplacement ΔZ du chariot 22 le long du mât par rapport à la position initiale Z0 du chariot. On a donc ΔZ= Z - Z0 According to the invention, the drilling machine 10 further comprises a measuring member 50 for determining a displacement ΔZ of the carriage 22 along the mast with respect to the initial position Z 0 of the carriage. We therefore have ΔZ = Z - Z 0

Dans ce mode de réalisation non limitatif, l'organe de mesure 50 est disposé entre le chariot 22 et le mât 12. Il comporte le vérin hydraulique 30, de sorte que le déplacement du chariot 22 est déterminé à partir de la variation de la longueur du vérin 30. In this non-limiting embodiment, the measuring member 50 is disposed between the carriage 22 and the mast 12. It comprises the hydraulic cylinder 30, so that the movement of the carriage 22 is determined from the variation in the length. cylinder 30.

Le vérin 30 comporte un capteur de déplacement 52 qui permet de mesurer la valeur du déplacement du chariot 22. Dans l'exemple de la figure 2 , la vitesse d'extraction sans rotation est supérieure à V0 et V1 , le chariot 22 s'est déplacé vers l'extrémité supérieure 12a du mât d'une valeur ΔZ1 jusqu'à atteindre la position sur l'axe Z. On comprend donc que ΔZ1 = Z1 - Z0 .The jack 30 comprises a displacement sensor 52 which makes it possible to measure the value of the displacement of the carriage 22. In the example of figure 2 , the extraction speed without rotation is greater than V 0 and V 1 , the carriage 22 has moved towards the upper end 12a of the mast by a value ΔZ 1 until it reaches the position on the Z axis . It is therefore understood that ΔZ 1 = Z 1 - Z 0 .

Dans le cas de la figure 3 , la vitesse d'extraction sans rotation V2 est inférieure à Vo et le chariot 22 s'est déplacé vers l'extrémité inférieure 12a du mât 12 d'une distance ΔZ2 pour atteindre la position Z2 située en-dessous de la position Z0 . On comprend donc que ΔZ2=Z2-Z0, avec ΔZ2 <0.In the case of figure 3 , the extraction speed without rotation V 2 is less than V o and the carriage 22 has moved towards the lower end 12a of the mast 12 by a distance ΔZ 2 to reach the position Z2 located below the position Z 0 . It is therefore understood that ΔZ 2 = Z 2 -Z 0 , with ΔZ 2 <0.

Conformément à l'invention, le dispositif de nettoyage 20 comporte en outre un dispositif de régulation de vitesse 54, schématisé en figure 4 pour réguler la vitesse de rotation ω de la racle 40 en fonction du déplacement ΔZ du chariot déterminé par l'organe de mesure.According to the invention, the cleaning device 20 further comprises a speed regulating device 54, shown diagrammatically in figure 4 to regulate the speed of rotation ω of the doctor blade 40 as a function of the displacement ΔZ of the carriage determined by the measuring member.

Dans cet exemple le dispositif de régulation de vitesse 54 est relié au capteur de déplacement 52, et commande le moteur 28 en lui fournissant une consigne de vitesse de rotation ω de la racle.In this example, the speed regulation device 54 is connected to the displacement sensor 52, and controls the motor 28 by supplying it with a speed setpoint ω of the doctor blade.

Dans ce mode de réalisation, le dispositif de régulation de vitesse 54 est configuré pour modifier la vitesse de rotation ω de la racle 40 en fonction du déplacement ΔZ du chariot, de façon à ramener le chariot 22 vers la position initiale Z0 lors d'un déplacement du chariot par rapport à la position initiale Z0 .In this embodiment, the speed regulating device 54 is configured to modify the speed of rotation ω of the doctor blade 40 as a function of the movement ΔZ of the carriage, so as to bring the carriage 22 back to the initial position Z 0 when a movement of the carriage relative to the initial position Z 0 .

Pour ce faire, le dispositif de régulation de vitesse 54 est configuré pour augmenter la vitesse de rotation ω de la racle 40 lorsque le chariot 22 se déplace vers l'extrémité supérieure 12a du mât 12. To do this, the speed regulator 54 is configured to increase the speed of rotation ω of the doctor blade 40 when the carriage 22 moves towards the upper end 12a of the mast 12.

Dans l'exemple de la figure 2 , l'organe de mesure 50 a déterminé que le chariot 22 s'est déplacé de la distance ΔZ1 vers l'extrémité supérieure 12a du mât 12. En conséquence, le dispositif de régulation de vitesse 54 envoie la consigne de vitesse ω1 au moteur 28 afin d'augmenter la vitesse de rotation de la racle 40. In the example of figure 2 , the measuring device 50 has determined that the carriage 22 has moved by the distance ΔZ 1 towards the upper end 12a of the mast 12. Consequently, the speed regulating device 54 sends the speed setpoint ω 1 to the motor 28 in order to increase the speed of rotation of the doctor blade 40.

La vitesse de rotation ω1 est strictement supérieure à la vitesse de rotation ω0 initiale. On expliquera ci-dessous comment est déterminée la vitesse ω1. The speed of rotation ω 1 is strictly greater than the speed of rotation ω 0 initial. We will explain below how the speed ω 1 is determined .

Inversement, le dispositif de régulation de vitesse 54 selon l'invention est configuré pour diminuer la vitesse de rotation ω de la racle 40 lorsque le chariot se déplace vers l'extrémité inférieure 12b du mât 12. Conversely, the speed regulation device 54 according to the invention is configured to decrease the speed of rotation ω of the doctor blade 40 when the carriage moves towards the lower end 12b of the mast 12.

Dans l'exemple de la figure 3 , l'organe de mesure 50 a déterminé que le chariot 22 s'est déplacé d'une distance ΔZ2 depuis la position initiale Z0 vers l'extrémité inférieure 12b du mât 12. En conséquence, le dispositif de régulation de vitesse 54 diminue la vitesse de rotation ω de la racle 40 pour l'amener à la vitesse de rotation ω2 inférieure à la vitesse de rotation ω0 initiale.In the example of figure 3 , the measuring member 50 has determined that the carriage 22 has moved a distance ΔZ 2 from the initial position Z 0 towards the lower end 12b of the mast 12. Consequently, the speed regulating device 54 decreases the speed of rotation ω of the doctor blade 40 to bring it to the speed of rotation ω 2 lower than the speed of rotation ω 0 initial.

Dans l'exemple illustré ici, le dispositif de régulation de vitesse 54 est configuré de telle sorte que la vitesse de rotation ω soit une fonction croissante linéaire du déplacement ΔZ du chariot le long du mât. Sur le graphique de la figure 5 , on a illustré la variation de vitesse de rotation Δω de la racle 40 en fonction de la position Z du chariot 22 par rapport à sa position initiale Z0 . Dans cet exemple, on a : ω = ω 0 + Δω

Figure imgb0001
In the example illustrated here, the speed regulating device 54 is configured such that the speed of rotation ω is a linear increasing function of the displacement ΔZ of the carriage along the mast. On the graph of the figure 5 , there is illustrated the variation in speed of rotation Δω of the doctor blade 40 as a function of the position Z of the carriage 22 relative to its initial position Z 0 . In this example, we have: ω = ω 0 + Δω
Figure imgb0001

Dans l'exemple des figures 2 et 3 , ω1 = ω0 + Δω1 et ω2 = ω0 + Δω2, avec Δω1 >0 et Δω2 <0In the example of figures 2 and 3 , ω 1 = ω 0 + Δω 1 and ω 2 = ω 0 + Δω 2 , with Δω 1 > 0 and Δω 2 <0

La courbe illustrée en figure 5 est une fonction linéaire croissante représentant la variation de vitesse en fonction du déplacement vertical du chariot par rapport à Z0 . On a donc Δω = k∗ (Z-Zo), où k est le coefficient de proportionnalité.The curve illustrated in figure 5 is an increasing linear function representing the speed variation as a function of the vertical displacement of the carriage with respect to Z 0 . We therefore have Δω = k ∗ (Z-Zo), where k is the coefficient of proportionality.

A titre d'exemple, le pas p de la pale est généralement compris entre 0,3 et 2 mètres, et la vitesse de remontée de la tarière peut varier entre 50 et 200 mètres par heure.By way of example, the pitch p of the blade is generally between 0.3 and 2 meters, and the ascent speed of the auger can vary between 50 and 200 meters per hour.

Les inventeurs ont réalisé plusieurs simulations numériques :

  • Pour un pas égal à 1,5 m, on pourra choisir un coefficient k de l'ordre de 40 tours/minute/mètre;
  • Pour un pas égal à 1,2 m, on pourra choisir un coefficient k de l'ordre de 50 tours/minute/mètre;
  • Pour un pas égal à 0,3 m, on pourra choisir un coefficient k de l'ordre de 200 tours/minute/mètre.
The inventors carried out several numerical simulations:
  • For a pitch equal to 1.5 m, a coefficient k of the order of 40 revolutions / minute / meter can be chosen;
  • For a pitch equal to 1.2 m, a coefficient k of the order of 50 revolutions / minute / meter can be chosen;
  • For a pitch equal to 0.3 m, a coefficient k of the order of 200 revolutions / minute / meter can be chosen.

Ces exemples de valeurs de k permettent de s'assurer que la vitesse de rotation de la racle soit adaptée pour stopper l'éloignement du chariot 22 de sa position initiale Z0 . D'autres valeurs de k pourront être choisies en fonction du pas de la pale.These examples of values of k make it possible to ensure that the speed of rotation of the doctor blade is adapted to stop the movement of the carriage 22 from its initial position Z 0 . Other values of k may be chosen as a function of the pitch of the blade.

Le dispositif peut également être paramétré de sorte que la vitesse ω1 soit suffisante pour ramener le chariot 22 vers la position initiale Z0, ce déplacement étant illustré par la flèche F1 de la figure 2 . Pour ce faire, la variation de vitesse de rotation Δω1 sera déterminée en choisissant un coefficient k plus élevé que ceux proposés ci-dessus. On comprend notamment que le chariot reviendra vers sa position initiale si la vitesse d'extraction sans rotation fluctue autour de la valeur V0. The device can also be configured so that the speed ω 1 is sufficient to bring the carriage 22 back to the initial position Z 0 , this movement being illustrated by the arrow F1 of the figure 2 . To do this, the variation in speed of rotation Δω 1 will be determined by choosing a coefficient k higher than those proposed above. It will be understood in particular that the carriage will return to its initial position if the extraction speed without rotation fluctuates around the value V 0 .

De même, la variation de vitesse de rotation Δω2 pourra être calibrée de manière que le chariot 22 retourne vers sa position initiale Z0 en cas de déplacement du chariot 22 vers l'extrémité inférieure 12b du mât 12, ce déplacement du chariot étant illustré par la flèche F2 sur la figure 3 . Likewise, the variation in speed of rotation Δω 2 can be calibrated so that the carriage 22 returns to its initial position Z 0 in the event of displacement of the carriage 22 towards the lower end 12b of the mast 12, this movement of the carriage being illustrated by arrow F2 on the figure 3 .

Comme illustré en figure 1 , la racle 40 prend appui sur la spire inférieure 18a de la pale hélicoïdale 18. L'effort exercé par la racle 40 sur la spire inférieure 18a est constitué par le poids propre du chariot.As shown in figure 1 , the doctor blade 40 is supported on the lower turn 18a of the helical blade 18. The force exerted by the doctor blade 40 on the lower turn 18a is formed by the self-weight of the carriage.

Le dispositif de nettoyage comporte en outre un dispositif de régulation de force 60, schématisé en figure 1 pour réguler la force appliquée par la racle 40 sur la spire inférieure 18a. Ce dispositif de régulation de force 60 comporte le vérin hydraulique 30 disposé entre le chariot 22 et le mât 12. The cleaning device further comprises a force regulating device 60, shown diagrammatically in figure 1 to regulate the force applied by the doctor blade 40 on the lower turn 18a. This force regulation device 60 comprises the hydraulic cylinder 30 arranged between the carriage 22 and the mast 12.

Le vérin 30 constitue donc un actionneur 31 qui est disposé entre le corps et le mât en étant configuré pour exercer un effort de poussée T sur le corps 24. Cet effort de poussée étant, dans cet exemple, égal à une fraction du poids du chariot, en l'espèce 50% du poids du chariot 22. The jack 30 therefore constitutes an actuator 31 which is arranged between the body and the mast, being configured to exert a thrust force T on the body 24. This thrust force being, in this example, equal to a fraction of the weight of the carriage, in this case 50% of the weight of the carriage 22.

L'effort de poussée T est dirigé selon la direction longitudinale L du mât vers l'extrémité supérieure du mât 12. The thrust force T is directed in the longitudinal direction L of the mast towards the upper end of the mast 12.

On comprend que cet effort de poussée T permet de diminuer l'effort de pression verticale exercée par la racle 40 sur la spire inférieure 18a. Pour ce faire, le vérin hydraulique 30 est alimenté à une pression de fluide hydraulique constante.It will be understood that this thrust force T makes it possible to reduce the vertical pressure force exerted by the doctor blade 40 on the lower turn 18a. To do this, the hydraulic cylinder 30 is supplied at a constant hydraulic fluid pressure.

On comprend donc que, dans cet exemple avantageux, l'organe de mesure 50 comporte le vérin hydraulique 30 de l'actionneur 31. It will therefore be understood that, in this advantageous example, the measuring member 50 comprises the hydraulic cylinder 30 of the actuator 31.

Comme mentionné ci-dessus, on comprend que le dispositif de régulation de vitesse 54 selon l'invention est également apte à réguler la vitesse de rotation de la racle 40 lors d'une phase d'extraction verticale de la tarière 14 avec rotation, quelle que soit son sens de rotation.As mentioned above, it is understood that the speed regulating device 54 according to the invention is also able to regulate the speed of rotation of the doctor blade 40 during a phase of vertical extraction of the auger 14 with rotation, which whatever its direction of rotation.

Le dispositif de régulation de vitesse de la racle 40 est également apte à réguler la vitesse de la racle lors de la phase de forage, c'est-à-dire lors d'un déplacement vertical descendant de la tarière avec rotation, correspondant à un mouvement de vissage de la tarière dans le sol.The doctor blade speed control device 40 is also able to regulate the doctor blade speed during the drilling phase, that is to say during a downward vertical movement of the auger with rotation, corresponding to a screwing movement of the auger into the ground.

Le dispositif de régulation est également apte à réguler la vitesse de rotation de la racle 40 lors d'une rotation de la tarière, sans déplacement vertical de cette dernière, afin de corriger un déplacement du chariot 22 qui pourrait résulter d'une variation de la vitesse de rotation de la tarière 14. The regulating device is also able to regulate the speed of rotation of the doctor blade 40 during a rotation of the auger, without vertical displacement of the latter, in order to correct a displacement of the carriage 22 which could result from a variation of the auger. auger rotation speed 14.

Claims (13)

  1. A drilling machine (10) including:
    a mast (12) having a longitudinal direction (L);
    an auger (14) having a longitudinal axis (A) parallel to the longitudinal direction (L) and comprising a helical airfoil;
    a displacement device for moving the auger (14) relative to the mast (12) in translation along the longitudinal direction (L);
    a device for cleaning (20) the auger (14) comprising a carriage (22) mounted to the mast (12) in a sliding manner along the longitudinal direction (L) of the mast (12), the carriage including a body (24) surrounding the auger and a scraper (40) mounted to the body rotatably about an axis of rotation (R) parallel to the longitudinal direction (L), the scraper extending between a lower turn (18a) and an upper turn (18b) of the helical airfoil;
    characterized in that the drilling machine (10) further includes a measuring member (50) for determining the displacement (ΔZ, ΔZ1, ΔZ2) of the carriage (22) along the mast (12) relative to an initial position (Z0) of said carriage, and in that the cleaning device (20) further includes a speed regulation device for regulating the speed (54) of rotation (ω) of the scraper (40) as a function of said displacement (ΔZ, ΔZ1, ΔZ2) of the carriage.
  2. The drilling machine according to claim 1, characterized in that the speed regulation device (54) is configured to change the speed of rotation (ω) of the scraper (40) as a function of the displacement (ΔZ, ΔZ1, ΔZ2) of the carriage (22) relative to the initial position so as to bring the carriage back to the initial position (Z0) during a displacement (ΔZ, ΔZ1, ΔZ2) of the carriage (22) relative to the initial position (Z0).
  3. The drilling machine according to claim 1 or 2, characterized in that the speed regulation device (54) is configured to increase the speed of rotation (ω, ω1, ω2) of the scraper when the carriage moves towards an upper end of the mast (12).
  4. The drilling machine according to any one of the preceding claims, characterized in that the speed regulation device (54) is configured to decrease the speed of rotation of the scraper (40) when the carriage moves towards a lower end (12b) of the mast (12).
  5. The drilling machine according to any one of the preceding claims, characterized in that the speed regulation device (54) is configured such that the speed of rotation (ω) is a linear increasing function (f) of the displacement (ΔZ) of the carriage along the mast relative to the initial position (Z0).
  6. The drilling machine according to any one of the preceding claims, characterized in that said measuring device is disposed between the carriage (22) and the mast (12).
  7. The drilling machine according to claim 6, characterized in that the measuring member (50) includes at least one cylinder (30) disposed between the body and the mast, the displacement of the carriage (22) being determined from the variation in length of the cylinder (30).
  8. The drilling machine according to any one of the preceding claims, characterized in that the scraper (40) bears on the lower turn (18a), and in that the cleaning device further includes a force regulation device (60) for regulating the force applied by the scraper (40) on the lower turn (18a).
  9. The drilling machine according to claim 8, characterized in that the force regulation device (60) is disposed between the carriage and the mast.
  10. The drilling machine according to claim 9, characterized in that the force regulation device includes at least one actuator (31) disposed between the body and the mast, the actuator being configured to exert a thrust force (T) on the body (24), said thrust force (T) being directed along the longitudinal direction (L) of the mast, towards an upper end of the mast (12).
  11. The drilling machine according to claim 10, characterized in that the actuator (31) includes a hydraulic cylinder.
  12. The drilling machine according to claim 11, characterized in that the hydraulic cylinder (30) is supplied at a constant hydraulic fluid pressure.
  13. The drilling machine according to either of claims 11 and 12, characterized in that the measuring member (50) includes the hydraulic cylinder (30) of the actuator (31).
EP17822403.6A 2016-12-12 2017-12-12 Drilling machine comprising an auger and device for cleaning the auger Active EP3551829B1 (en)

Applications Claiming Priority (2)

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FR1662315A FR3060048B1 (en) 2016-12-12 2016-12-12 DRILLING MACHINE INCLUDING A AUGER AND A AUGER CLEANING DEVICE
PCT/FR2017/053511 WO2018109356A1 (en) 2016-12-12 2017-12-12 Drilling machine comprising an auger and device for cleaning the auger

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CN113944433B (en) * 2021-10-29 2022-12-16 中国一冶集团有限公司 Drill rod mud scraping device and using method
CN114151019B (en) * 2021-11-24 2024-03-29 深圳市工勘岩土集团有限公司 Pushing type slag discharging noise reduction structure of rotary drilling bucket
CN117489263B (en) * 2023-10-10 2024-05-14 浙江恒悦机械有限公司 Ground auger for building foundation and use method thereof

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FR2563861B1 (en) 1984-05-03 1986-08-29 Soletanche DEVICE FOR CLEANING AUGER BITS.
EP0427454B1 (en) * 1989-11-10 1993-08-04 Dawson Construction Plant Limited Auger cleaner
ITUD20020117A1 (en) * 2002-05-30 2003-12-01 Casagrande Spa CLEANING DEVICE FOR PROPELLER TOOLS AND CLEANING PROCEDURE OF A PROPELLER TOOL ADOPTING SUCH DEVICE
GB2414998B (en) * 2004-06-10 2008-04-16 Cementation Found Skanska Ltd Auger cleaner
ITMI20122264A1 (en) * 2012-12-28 2014-06-29 Soilmec Spa ELICA CLEANER DEVICE TO REMOVE FROM A SCREW TOOL, EXCAVATION MACHINE PROVIDING SUCH A CLEANER AND USING THIS EXCAVATION MACHINE

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WO2018109356A1 (en) 2018-06-21
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FR3060048A1 (en) 2018-06-15
FR3060048B1 (en) 2020-12-11

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