EP3216974A1 - Drill head for drilling equipment for formation of bores in soil with inferior stability - Google Patents
Drill head for drilling equipment for formation of bores in soil with inferior stability Download PDFInfo
- Publication number
- EP3216974A1 EP3216974A1 EP16159720.8A EP16159720A EP3216974A1 EP 3216974 A1 EP3216974 A1 EP 3216974A1 EP 16159720 A EP16159720 A EP 16159720A EP 3216974 A1 EP3216974 A1 EP 3216974A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plate
- drill head
- arcuate
- drill
- drilling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- 238000005553 drilling Methods 0.000 title claims abstract description 24
- 239000002689 soil Substances 0.000 title claims abstract description 8
- 230000015572 biosynthetic process Effects 0.000 title 1
- 238000006073 displacement reaction Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 description 3
- 238000007373 indentation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Images
Classifications
-
- 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
- E21B10/00—Drill bits
- E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
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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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/046—Couplings; joints between rod or the like and bit or between rod and rod or the like with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/72—Pile shoes
-
- 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
- E21B10/00—Drill bits
- E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
- E21B10/627—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable with plural detachable cutting elements
Definitions
- the present invention relates to a drill head for creating boreholes in insufficiently supporting ground by displacement of the soil material, which drill head can be placed on a drill pipe of the drilling device and with the drill pipe forms a secured against rotation, releasable connection and the drill head has a base plate, with which is the Bohrrohrende closed, on which base plate at least one substantially perpendicular thereto aligned drill head plate can be placed.
- piles for example, will be used to construct this structure. These transfer the building loads to the deeper, load-bearing soil layers.
- a drill pipe is equipped at the lower end with a drill head.
- the drill head and the drill pipe are secured together against rotation.
- this drill pipe is screwed under high vertical pressure to the required depth in the soil, the soil material is displaced by the volume of the drill pipe.
- a prefabricated pile reinforcement is inserted into the drill pipe and the pipe filled with concrete.
- the drill pipe is retracted with constant rotation.
- the drill head separates from the drill pipe and remains in the ground.
- the concrete located in the drill pipe flows out of the drill pipe and so fills the resulting cavity in the ground after the withdrawal of the drill pipe to the required level. After hardening of the concrete is thus obtained the loadable reinforced Verdrändungsbohrpfahl.
- drill heads are known in many ways.
- the publication EP A 2,146,046 shows a drill head, which is a base plate has, on which aligned perpendicular thereto drill head plates are placed, which drill head via cams, which protrude into corresponding recesses in the Bohrrohrende, with the drill pipe forms a secured against rotation, releasable connection.
- this drill head which is very easy and inexpensive to manufacture, the holes can be easily and inexpensively created.
- the object of the present invention is to design the drill head so that in addition to the simple and inexpensive production and the possibility of space-saving storage and transport more efficient creation of a well can be achieved.
- the solution of this object is achieved in that in the lateral flanks of this drill head plate at least one arcuate plate is used, which is equipped with first holding means, which are held in second holding means, which are attached to the lateral edges of the drill head plate, and that the arcuate Plate is formed and inserted into the flanks of the drill head plate, that their surfaces are effective as a screw surfaces during drilling.
- the drill head rotated by the drilling device can penetrate into the earth rapidly and more efficiently via the arcuate plate acting as a screw surface, in particular the expenditure of time for creating a borehole is reduced with such a drill head.
- a first arcuate plate and the first arcuate plate opposite second arcuate plate can be used.
- the symmetrical arrangement of these two arcuate plates improves the efficiency of the drill head.
- a first drill head plate and a substantially perpendicular thereto aligned second drill head plate can be placed on the base plate, the thus with slot-shaped recesses are provided that the two drill head plates are crosswise plugged into each other, whereby a simple and stable construction of the drill head is achieved.
- a simple construction of the drill head is also achieved by extending the first arcuate plate and the opposing arcuate plate each over a flank of the first wellhead plate and an adjacent flank of the second wellhead plate.
- the portions of the first wellhead and the second wellhead facing away from the base plate are tapered, and a third arcuate plate is insertable in the tapered portions of the first wellhead and the second wellhead, which further improves the efficiency of the drilling operation.
- the third arcuate plate extends over one flank of the first wellhead plate, the other flank of the second wellhead plate, and the other flank of the first wellhead plate. This improves the stability of the drill head.
- a further advantageous embodiment of the invention consists in that the first holding means and the second holding means are formed from slot-shaped recesses and / or projections mounted in the respective arcuate plates or the drill head plates. Hubs of simple design of these compounds and the simple assembly of the drill head also results in good stability.
- the first wellhead plate and / or the second wellhead plate is provided with cams which protrude cams through corresponding recesses mounted on the base plate, and the cervical bore cams project over the base plate and protrude into correspondingly drill pipe end mounted slots.
- cams which protrude cams through corresponding recesses mounted on the base plate, and the cervical bore cams project over the base plate and protrude into correspondingly drill pipe end mounted slots.
- the drill head plates and the arcuate plates can be made by cutting from a commercially available steel plate, whereby the cost can be kept low.
- FIG. 1 a first embodiment of an inventive drill head 1 can be seen, which has a base plate 2, on which a first drill head plate 3 and a second drill head plate 4 are attached.
- a base plate 2 on which a first drill head plate 3 and a second drill head plate 4 are attached.
- the first drill head plate 3 and the second drill head plate 4 are aligned vertically with respect to the base plate 2, moreover, these two drill head plates 3 and 4, which are pushed into each other, as will be described later, perpendicular to each other.
- the first drill head plate 3 and the second drill head plate 4 are each tapered in the areas facing away from the base plate 2.
- the base plate 2 and the first wellhead plate 3 and the second wellhead plate 4 are detachably connected to an end portion of a drill pipe 5, as will also be described later.
- This drill pipe 5 is driven in a known manner by a drilling device, not shown, about a drilling axis 6 rotating and pressed for drilling in the ground.
- first arcuate plate 8 In the one side flank 7 of the second drill head plate 4, the front portion of a first arcuate plate 8 is inserted, whose other end portion is inserted into the one side flank 9 of the first drill head plate 3.
- this first arcuate plate 8 has first holding means 10, which are held in second holding means 11 which are attached to the drill head plates 3 and 4, as will be described later.
- This first arcuate plate 8 is inserted into the one lateral flank 7 of the second drill head plate 4 and into the one lateral flank 9 of the first drill head plate 3, that this is effective as a screw surfaces, this, this first arcuate plate 8 with respect to the drilling axis 6 a pitch angle ⁇ , which is about 20 degrees in the embodiment shown here, this inclination angle can of course be chosen so that the efficiency of the drilling process in the respective corresponding subsoil is the most optimal, which can be determined for example by experiments.
- This first arcuate plate 8 is configured such that the radial distance of the outer edge of this first arcuate plate 8 from the drilling axis 6 from one area held in the second bit plate 4 to the other area held in the first bit plate 3 , is increasingly.
- first arcuate plate 8 Symmetrical to this first arcuate plate 8 is in the first drill head plate 3 and the second drill head plate 4, a second arcuate plate 12, which is formed the same as the first arcuate plate 8, used accordingly. Further, in the tapered portion of the first wellhead plate 3 and the second wellhead plate 4, a third arcuate plate 13 is inserted, as will be explained later. Of course, it would also be conceivable to provide less than three or more than three arcuate plates, depending on the height of the drill head.
- FIGS. 2 to 4 From the FIGS. 2 to 4 the arrangement of the first arcuate plate 8, the second arcuate plate 12 and the third arcuate plate 13 in the two drill head plates 3 and 4 can be seen.
- FIG. 2 In particular, it can be seen how the first arcuate plate 8 extends over the one lateral flank 7 of the second wellhead plate 4 and the one lateral flank 9 of the first wellhead plate 3.
- FIG. 4 in particular shows how the second arcuate plate 12 extends over the other lateral flank 14 of the second wellhead plate 4 and the other lateral flank 15 of the first wellhead plate 3. It can also be seen how the third arcuate plate 13 extends over the one lateral flank 9 of the first wellhead plate 3, the other lateral flank 14 of the second wellhead plate 4 and the other lateral flank 15 of the first wellhead plate 3.
- FIG. 5 are the items to the FIGS. 1 to 4 shown illustrated first embodiment of a drill head.
- the first drill head plate 3 and the second drill head plate 4 each have a slot-shaped recess 16 and 17, such that they can be inserted into each other, as shown in FIGS FIGS. 1 to 4 is apparent.
- the first drill head plate 3 and the second drill head plate 4 have two cams 18 and 19, respectively, on the regions facing the base plate 2. These cams 18 and 19 can be inserted into corresponding slits 20 and 21 mounted in the base plate 2, the cams 18 and 19 protrude beyond the base plate 2 in this case.
- the first arcuate plate 8, the second arcuate plate 12 and the third arcuate plate 13 are provided with first holding means 10. These first holding means 10 are formed as projections 26.
- the first drill head plate 3 and the second drill head plate 4 are respectively equipped with second holding means 11.
- These second holding means 12 are designed in particular as slot-shaped recesses 26.
- the first arcuate plate 8, the second arcuate plate 12 and the third arcuate plate 13 with their first holding means 10 in the second holding means of the two drill head plates 3 and 4 are suspended accordingly.
- the first arcuate plate 8 and the second arcuate plate 12 on a nose 25, which surrounds the second drill head plate 4, as in particular in FIG. 2 is apparent.
- an optimal support of this first arcuate plate 8 and this second arcuate plate 12 in the drill head 1 is achieved.
- FIGS. 6 to 9 a second embodiment of a drill head 1 according to the invention is shown.
- the structure of this drill head 1 is substantially identical to the structure of the drill head, as he as the first embodiment in the FIGS. 1 to 5 is shown, thus the same reference numerals are used for the same parts, the description of the FIGS. 1 to 4 applies accordingly to the FIGS. 6 to 9 so that a further description is omitted.
- the difference of the first embodiment shown in FIGS FIGS. 1 to 5 , and the second embodiment shown in FIGS FIGS. 6 to 10 is in FIG. 10 seen.
- the first arcuate plate 8 and the second arcuate plate 12 have no nose 27, as the two arcuate plate 8 and 12 in do first embodiment, can be seen from the FIG.
- the first arcuate plate 8 and the second arcuate plate 12 are each provided with a shoulder 28.
- This shoulder 28 supports, as in particular from the FIGS. 8 and 9 it can be seen, the second drill head plate 4 from such that the can not bend during the drilling process. As a result, optimum strength of the drill head 1 is achieved.
- FIG. 11 shows the base plate 2 of the drill head 1, which is penetrated by the cams 18 and 19 of the first drill head plate 3 and the second drill head plate 4.
- the two cams 18 have indentations 23, in which the clip 24 can be inserted, so that the drill head 1 is held together, as already mentioned. Can engage in the cams 18 and 19, as has also already been mentioned, the corresponding end of the drill pipe. 5
- the drill head can penetrate very efficiently into the soil to be drilled.
- this can be brought in a very compact form on the site, since the items are each plate-shaped, the assembly of the drill head takes place on the site, which takes up little space for transport and storage.
- the individual plate elements can be cut in the simplest way from a steel sheet, for example by a controlled laser cutting device, so that these plate shapes can be produced in a simple and cost-effective manner.
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- Environmental & Geological Engineering (AREA)
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Abstract
Ein Bohrkopf (1) für eine Bohreinrichtung zur Erstellung von Bohrlöchern in ungenügend tragendem Baugrund durch Verdrängung des Bodenmaterials weist eine Basisplatte (2) auf, mit welcher das Bohrrohrende lösbar verbindbar und verschliessbar ist, auf welche Basisplatte (2) mindestens eine im wesentlichen senkrecht dazu ausgerichtete Bohrkopfplatte (3) aufsetzbar ist. In die seitlichen Flanken (9, 15) ist mindestens eine bogenförmige Platte einsetzbar, die mit ersten Haltemitteln (10) ausgestattet ist, welche in zweiten Haltemitteln (11) gehalten sind, die an den seitlichen Flanken (9, 15) der Bohrkopfplatte (3) angebracht sind. Die bogenförmige Platte (8) ist derart ausgebildet und in die Flanken der Bohrkopfplatte (3) einsetzbar, das deren Oberflächen beim Bohrvorgang als Schraubflächen wirksam sind. Dadurch kann die Effizienz des Bohrens verbessert werden.A drill head (1) for a drilling device for creating boreholes in insufficiently supporting ground by displacement of the soil material has a base plate (2) with which the Bohrrohrende is detachably connectable and closable, on which base plate (2) at least one substantially perpendicular thereto aligned drill head plate (3) can be placed. In the lateral flanks (9, 15) at least one arcuate plate is used, which is equipped with first holding means (10) which are held in second holding means (11) which on the lateral flanks (9, 15) of the drill head plate (3 ) are mounted. The arcuate plate (8) is formed and inserted into the flanks of the drill head plate (3), the surfaces of which are effective as a screw surfaces during the drilling process. This can improve the efficiency of drilling.
Description
Die vorliegende Erfindung bezieht sich auf einen Bohrkopf zur Erstellung von Bohrlöchern in ungenügend tragendem Baugrund durch Verdrängung des Bodenmaterials, welcher Bohrkopf auf ein Bohrrohr der Bohreinrichtung aufsetzbar ist und mit dem Bohrrohr eine gegen Verdrehung gesicherte, lösbare Verbindung bildet und der Bohrkopf eine Basisplatte aufweist, mit welcher das Bohrrohrende verschliessbar ist, auf welche Basisplatte mindestens eine im wesentlichen senkrecht dazu ausgerichtete Bohrkopfplatte aufsetzbar ist.The present invention relates to a drill head for creating boreholes in insufficiently supporting ground by displacement of the soil material, which drill head can be placed on a drill pipe of the drilling device and with the drill pipe forms a secured against rotation, releasable connection and the drill head has a base plate, with which is the Bohrrohrende closed, on which base plate at least one substantially perpendicular thereto aligned drill head plate can be placed.
Wenn sich der in der Fundationstiefe eines Bauprojektes anstehende Baugrunds zur Aufnahme der Lasten als ungenügend tragfähig erweist oder für das Bauwerk unverträglich grosse Setzungen verursacht, werden zur Gründung dieses Bauwerkes zum Beispiel Pfähle eingesetzt. Diese übertragen die Gebäudelasten auf die tiefer liegenden, tragfähigen Bodenschichten.If the subsoil found in the depth of the foundations of a construction project proves to be insufficiently viable to accommodate the loads or causes incompatibly large subsidence for the building, piles, for example, will be used to construct this structure. These transfer the building loads to the deeper, load-bearing soil layers.
Zur Herstellung eines derartigen Verdrängungsbohrpfahls wird ein Bohrrohr am unteren Ende mit einem Bohrkopf ausgestattet. Der Bohrkopf und das Bohrrohr sind miteinander gegen Verdrehung gesichert verbunden. Mittels einer Bohreinrichtung wird dieses Bohrrohr unter hohem Vertikaldruck bis auf die erforderliche Tiefe in den Boden eingedreht, das Bodenmaterial wird hierbei um das Volumen des Bohrrohres verdrängt. Wenn die Endtiefe erreicht ist, wird eine vorgefertigte Pfahlarmierung in das Bohrrohr eingeführt und das Rohr mit Beton ausgefüllt. Hierbei wird das Bohrrohr unter stetiger Drehung zurückgezogen. Der Bohrkopf löst sich vom Bohrrohr ab und verbleibt im Baugrund. Während des Rückzugs fliesst der sich im Bohrrohr befindliche Beton aus dem Bohrrohr aus und füllt so den entstandenen Hohlraum im Erdreich nach erfolgten Rückzug des Bohrrohres bis auf das erforderliche Niveau auf. Nach der Aushärtung des Betons erhält man somit den belastbaren armierten Verdrändungsbohrpfahl.To produce such a displacement boring pile, a drill pipe is equipped at the lower end with a drill head. The drill head and the drill pipe are secured together against rotation. By means of a drilling device this drill pipe is screwed under high vertical pressure to the required depth in the soil, the soil material is displaced by the volume of the drill pipe. When the final depth is reached, a prefabricated pile reinforcement is inserted into the drill pipe and the pipe filled with concrete. In this case, the drill pipe is retracted with constant rotation. The drill head separates from the drill pipe and remains in the ground. During the retraction, the concrete located in the drill pipe flows out of the drill pipe and so fills the resulting cavity in the ground after the withdrawal of the drill pipe to the required level. After hardening of the concrete is thus obtained the loadable reinforced Verdrändungsbohrpfahl.
Derartige Bohrköpfe sind in vielfältiger Weise bekannt. Die Veröffentlichung
Die Aufgabe der vorliegenden Erfindung besteht nun darin, den Bohrkopf so auszugestalten, dass neben der einfachen und kostengünstigen Herstellung und der Möglichkeit einer platzsparenden Lagerung und Transport eine effizientere Erstellung eines Bohrloches erreicht werden kann.The object of the present invention is to design the drill head so that in addition to the simple and inexpensive production and the possibility of space-saving storage and transport more efficient creation of a well can be achieved.
Erfindungsgemäss erfolgt die Lösung dieser Aufgabe dadurch, dass in die seitlichen Flanken dieser Bohrkopfplatte mindestens eine bogenförmige Platte einsetzbar ist, die mit ersten Haltemitteln ausgestattet ist, welche in zweiten Haltemitteln gehalten sind, die an den seitlichen Flanken der Bohrkopfplatte angebracht sind, und dass die bogenförmige Platte derart ausgebildet und in die Flanken der Bohrkopfplatte einsetzbar ist, dass deren Oberflächen beim Bohrvorgang als Schraubflächen wirksam sind.According to the invention, the solution of this object is achieved in that in the lateral flanks of this drill head plate at least one arcuate plate is used, which is equipped with first holding means, which are held in second holding means, which are attached to the lateral edges of the drill head plate, and that the arcuate Plate is formed and inserted into the flanks of the drill head plate, that their surfaces are effective as a screw surfaces during drilling.
Mit dieser erfindungsgemässen Ausgestaltung des Bohrkopfes wird erreicht, dass über die als Schraubflächen wirksamen bogenförmigen Platte der durch die Bohreinrichtung in Drehung versetzte Bohrkopf rasch und effizienter in das Erdreich eindringen kann, insbesondere der zeitliche Aufwand zum Erstellen eines Bohrloches wird mit einem derartigen Bohrkopf geringer.With this embodiment of the drill head according to the invention, it is achieved that the drill head rotated by the drilling device can penetrate into the earth rapidly and more efficiently via the arcuate plate acting as a screw surface, in particular the expenditure of time for creating a borehole is reduced with such a drill head.
In vorteilhafter Weise sind in die seitlichen Flanken der Bohrkopfplatte eine erste bogenförmige Platte und eine der ersten bogenförmigen Platte gegenüberliegende zweite bogenförmige Platte einsetzbar. Durch die symmetrische Anordnung dieser beiden bogenförmigen Platten wird die Effizienz des Bohrkopfes verbessert.Advantageously, in the lateral flanks of the drill head plate, a first arcuate plate and the first arcuate plate opposite second arcuate plate can be used. The symmetrical arrangement of these two arcuate plates improves the efficiency of the drill head.
In vorteilhafter Weise sind auf die Basisplatte eine erste Bohrkopfplatte und eine im wesentlichen senkrecht dazu ausgerichtete zweite Bohrkopfplatte aufsetzbar, die dergestalt mit schlitzförmigen Ausnehmungen versehen sind, dass die beiden Bohrkopfplatten kreuzweise ineinander steckbar sind, wodurch ein einfacher und stabiler Aufbau des Bohrkopfes erreicht wird.Advantageously, a first drill head plate and a substantially perpendicular thereto aligned second drill head plate can be placed on the base plate, the thus with slot-shaped recesses are provided that the two drill head plates are crosswise plugged into each other, whereby a simple and stable construction of the drill head is achieved.
Ein einfacher Aufbau des Bohrkopfes wird auch dadurch erreicht, indem die erste bogenförmige Platte und die gegenüberliegende bogenförmige Platte sich jeweils über eine Flanke der ersten Bohrkopfplatte und eine benachbarte Flanke der zweiten Bohrkopfplatte erstrecken.A simple construction of the drill head is also achieved by extending the first arcuate plate and the opposing arcuate plate each over a flank of the first wellhead plate and an adjacent flank of the second wellhead plate.
In vorteilhafter Weise sind die der Basisplatte abgewandten Bereiche der ersten Bohrkopfplatte und der zweiten Bohrkopfplatte spitz zulaufend ausgebildet, und ist in den spitz zulaufenden Bereichen der ersten Bohrkopfplatte und der zweiten Bohrkopfplatte eine dritte bogenförmige Platte einsetzbar, was die Effizienz des Bohrvorgangs zusätzlich verbessert.Advantageously, the portions of the first wellhead and the second wellhead facing away from the base plate are tapered, and a third arcuate plate is insertable in the tapered portions of the first wellhead and the second wellhead, which further improves the efficiency of the drilling operation.
In vorteilhafter Weise erstreckt sich die dritte bogenförmige Platte über die eine Flanke der ersten Bohrkopfplatte, die andere Flanke der zweiten Bohrkopfplatte und die andere Flanke der ersten Bohrkopfplatte. Dadurch wird die Stabilität des Bohrkopfes verbessert.Advantageously, the third arcuate plate extends over one flank of the first wellhead plate, the other flank of the second wellhead plate, and the other flank of the first wellhead plate. This improves the stability of the drill head.
Eine weitere vorteilhafte Ausgestaltung der Erfindung besteht darin, dass die ersten Haltemittel und die zweiten Haltemittel aus in den jeweiligen bogenförmigen Platten beziehungsweise den Bohrkopfplatten angebrachten schlitzförmigen Ausnehmungen und/oder Vorsprüngen gebildet sind. Naben der einfachen Ausgestaltung dieser Verbindungen und dem einfachen Zusammensetzen des Bohrkopfes ergibt sich auch eine gute Stabilität.A further advantageous embodiment of the invention consists in that the first holding means and the second holding means are formed from slot-shaped recesses and / or projections mounted in the respective arcuate plates or the drill head plates. Hubs of simple design of these compounds and the simple assembly of the drill head also results in good stability.
In vorteilhafter Weise ist die erste Bohrkopfplatte und/oder die zweite Bohrkopfplatte mit Nocken ausgestattet ist, welche Nocken durch entsprechende an der Basisplatte angebrachten Ausnehmungen hindurchragen, und die Nocken auf der Bohrrohrseite über die Basisplatte vorstehend sind und in entsprechend am Bohrrohrende angebrachte Schlitze hineinragen. Dadurch wird eine einfache und optimale Verbindung des Bohrkopfes mit dem Bohrrohr erreicht. Um eine einfache Zusammensetzung und optimale Stabilität des Bohrkopfes zu erhalten, sind die Nocken über die Fixiermittel in der Basisplatte gehalten.Advantageously, the first wellhead plate and / or the second wellhead plate is provided with cams which protrude cams through corresponding recesses mounted on the base plate, and the cervical bore cams project over the base plate and protrude into correspondingly drill pipe end mounted slots. This achieves a simple and optimal connection of the drill head with the drill pipe. In order to obtain a simple composition and optimum stability of the drill head, the cams are held over the fixing means in the base plate.
Die Bohrkopfplatten und die bogenförmigen Platten können durch Ausschneiden aus einer handelsüblichen Stahlplatte hergestellt werden, wodurch die Kosten tief gehalten werden können.The drill head plates and the arcuate plates can be made by cutting from a commercially available steel plate, whereby the cost can be kept low.
Ausführungsformen der erfindungsgemässen Einrichtung werden nachfolgend anhand der beiliegenden Zeichnung beispielhaft näher erläutert.Embodiments of the device according to the invention are explained in more detail below by way of example with reference to the accompanying drawing.
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Figur 1 eine Seitenansicht auf eine erste Ausführungsform eines erfindungsgemässen Bohrkopfes;FIG. 1 a side view of a first embodiment of a drill head according to the invention; -
Figur 2 bis Figur 4 jeweils eine räumlicher Darstellung des erfindungsgemässen Bohrkopfes gemässFigur 1 , in unterschiedlichen Drehpositionen;FIG. 2 to FIG. 4 in each case a spatial representation of the inventive drill head according toFIG. 1 , in different rotational positions; -
Figur 5 in räumlicher und auseinander gezogener Darstellung die Einzelteile des Bohrkopfes gemässFigur 1 mit dem Bohrrohrende;FIG. 5 in spatial and exploded view of the individual parts of the drill head accordingFIG. 1 with the drill pipe end; -
Figur 6 eine Seitenansicht auf eine weitere Ausführungsform des erfindungsgemässen Bohrkopfes;FIG. 6 a side view of a further embodiment of the inventive drill head; -
Figur 7 bis Figur 9 jeweils in räumlicher Darstellung den erfindungsgemässen Bohrkopf gemässFigur 1 in unterschiedlichen Drehpositionen;FIG. 7 to FIG. 9 each in a spatial representation of the inventive drill head according toFIG. 1 in different rotational positions; -
Figur 10 in räumlicher und auseinander gezogener Darstellung die Einzelteile des Bohrkopfes gemässFigur 6 mit dem Bohrrohrende; undFIG. 10 in spatial and exploded view of the individual parts of the drill head accordingFIG. 6 with the drill pipe end; and -
Figur 11 in räumlicher Darstellung eine Ansicht von oben auf einen erfindungsgemässen Bohrkopf.FIG. 11 in a spatial representation, a view from above of a drill head according to the invention.
Aus
In die eine seitliche Flanke 7 der zweiten Bohrkopfplatte 4 ist der vordere Bereich einer ersten bogenförmigen Platte 8 eingesetzt, deren anderer Endbereich in die eine seitliche Flanke 9 der ersten Bohrkopfplatte 3 eingesetzt ist. Hierzu weist diese erste bogenförmige Platte 8 erste Haltemittel 10 auf, die in zweiten Haltemitteln 11, die an den Bohrkopfplatten 3 und 4 angebracht sind, gehalten sind, wie später noch beschrieben wird. Diese erste bogenförmige Platte 8 ist derart in die eine seitliche Flanke 7 der zweiten Bohrkopfplatte 4 und in die eine seitliche Flanke 9 der ersten Bohrkopfplatte 3 eingesetzt, dass diese als Schraubflächen wirksam ist, hierzu weist diese erste bogenförmige Platte 8 bezüglich der Bohrachse 6 einen Steigungswinkel α auf, der im hier dargestellten Ausführungsbeispiel etwa 20 Grad beträgt, dieser Neigungswinkel kann selbstverständlich so gewählt werden, dass die Effizienz des Bohrvorgangs im jeweiligen entsprechenden Baugrund am optimalsten ist, was beispielsweise durch Versuche bestimmt werden kann. Diese erste bogenförmige Platte 8 ist so ausgestaltet, dass der radiale Abstand des Aussenrandes dieser ersten bogenförmigen Platte 8 von der Bohrachse 6 vom einen Bereich, der in der zweiten Bohrkopfplatte 4 gehalten ist, bis zum anderen Bereich, der in der ersten Bohrkopfplatte 3 gehalten ist, zunehmend ist.In the one
Symmetrisch zu dieser ersten bogenförmigen Platte 8 ist in die erste Bohrkopfplatte 3 und die zweite Bohrkopfplatte 4 eine zweite bogenförmige Platte 12, die gleich ausgebildet ist, wie die erste bogenförmige Platte 8, entsprechend eingesetzt. Ferner ist im spitz zulaufenden Bereich der ersten Bohrkopfplatte 3 und der zweiten Bohrkopfplatte 4 eine dritte bogenförmige Platte 13 eingesetzt, wie später noch dargelegt wird. Selbstverständlich wäre es auch denkbar, weniger als drei oder mehr als drei bogenförmige Platten vorzusehen, je nachdem, welche Höhe der Bohrkopf aufweist.Symmetrical to this first
Aus den
In
Die erste bogenförmige Platte 8, die zweite bogenförmige Platte 12 und die dritte bogenförmige Platte 13 sind mit ersten Haltemitteln 10 ausgestattet. Diese ersten Haltemittel 10 sind als Vorsprünge 26 ausgebildet. Die erste Bohrkopfplatte 3 und die zweite Bohrkopfplatte 4 sind entsprechend mit zweiten Haltemitteln 11 ausgestattet. Diese zweiten Haltemitteln 12 sind insbesondere als schlitzförmige Ausnehmungen 26 ausgebildet. Dadurch können die ersten bogenförmige Platte 8, die zweite bogenförmige Platte 12 und die dritte bogenförmige Platte 13 mit ihren ersten Haltemitteln 10 in die zweiten Haltemittel der beiden Bohrkopfplatten 3 und 4 entsprechend eingehängt werden. In diesem Ausführungsbeispiel weisen die erste bogenförmige Platte 8 und die zweite bogenförmige Platte 12 eine Nase 25 auf, welche die zweite Bohrkopfplatte 4 umschliesst, wie dies insbesondere in
In den
Mit der hier dargestellten Ausgestaltung der Erfindung wird erreicht, dass der Bohrkopf sehr effizient in das zu bohrende Erdreich eindringen kann. Mit der steckbaren Ausgestaltung der Einzelteile dieses Bohrkopfes kann dieser in sehr kompakter Form auf die Baustelle gebracht werden, da die Einzelteile jeweils plattenförmig ausgebildet sind, der Zusammenbau des Bohrkopfes erfolgt auf der Baustelle, wodurch für den Transport sowie die Lagerhaltung wenig Platz beansprucht wird. Selbstverständlich wäre es auch denkbar, die plattenförmigen Einzelteile vorgängig zusammenzuschweissen. Die einzelnen Plattenelemente können in einfachster Weise aus einem Stahlblech ausgeschnitten werden, beispielsweise durch eine gesteuerte Laserschneideinrichtung, sodass diese Plattenformen in einfacher und kostengünstiger Weise hergestellt werden können.With the embodiment of the invention shown here is achieved that the drill head can penetrate very efficiently into the soil to be drilled. With the pluggable design of the items of this drill head this can be brought in a very compact form on the site, since the items are each plate-shaped, the assembly of the drill head takes place on the site, which takes up little space for transport and storage. Of course, it would also be possible to weld together the plate-shaped items previously. The individual plate elements can be cut in the simplest way from a steel sheet, for example by a controlled laser cutting device, so that these plate shapes can be produced in a simple and cost-effective manner.
Claims (11)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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PL16159720T PL3216974T3 (en) | 2016-03-10 | 2016-03-10 | Drill head for drilling equipment for formation of bores in soil with inferior stability |
LTEP16159720.8T LT3216974T (en) | 2016-03-10 | 2016-03-10 | Drill head for drilling equipment for formation of bores in soil with inferior stability |
EP16159720.8A EP3216974B1 (en) | 2016-03-10 | 2016-03-10 | Drill head for drilling equipment for formation of bores in soil with inferior stability |
Applications Claiming Priority (1)
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EP16159720.8A EP3216974B1 (en) | 2016-03-10 | 2016-03-10 | Drill head for drilling equipment for formation of bores in soil with inferior stability |
Publications (2)
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EP3216974A1 true EP3216974A1 (en) | 2017-09-13 |
EP3216974B1 EP3216974B1 (en) | 2018-12-26 |
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EP16159720.8A Active EP3216974B1 (en) | 2016-03-10 | 2016-03-10 | Drill head for drilling equipment for formation of bores in soil with inferior stability |
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EP (1) | EP3216974B1 (en) |
LT (1) | LT3216974T (en) |
PL (1) | PL3216974T3 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4227467A1 (en) | 2022-02-09 | 2023-08-16 | Marti Gründungstechnik AG | Drill head for drilling equipment for creating bores in a construction substrate |
Families Citing this family (1)
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US10544626B2 (en) | 2016-04-18 | 2020-01-28 | A.W.C. Distributing, Inc. | Cutting rate control for an ice drill |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE8908131U1 (en) * | 1989-07-04 | 1990-10-31 | Delmag Maschinenfabrik Reinhold Dornfeld GmbH & Co, 7300 Esslingen | Head for an earth drill |
DE19734068A1 (en) * | 1997-08-06 | 1999-02-11 | Verstraeten Beheersmij Bv | Bore point for earth displacement borer |
EP1580397A1 (en) * | 2004-03-26 | 2005-09-28 | BAUER Maschinen GmbH | Drill bit |
EP1860274A1 (en) * | 2006-04-26 | 2007-11-28 | BAUER Maschinen GmbH | Drill bit |
EP2146046A1 (en) | 2008-07-15 | 2010-01-20 | Marti Gründungstechnik AG | Drill head for a drilling device for creating drill holes in insufficiently stable foundation |
-
2016
- 2016-03-10 PL PL16159720T patent/PL3216974T3/en unknown
- 2016-03-10 EP EP16159720.8A patent/EP3216974B1/en active Active
- 2016-03-10 LT LTEP16159720.8T patent/LT3216974T/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE8908131U1 (en) * | 1989-07-04 | 1990-10-31 | Delmag Maschinenfabrik Reinhold Dornfeld GmbH & Co, 7300 Esslingen | Head for an earth drill |
DE19734068A1 (en) * | 1997-08-06 | 1999-02-11 | Verstraeten Beheersmij Bv | Bore point for earth displacement borer |
EP1580397A1 (en) * | 2004-03-26 | 2005-09-28 | BAUER Maschinen GmbH | Drill bit |
EP1860274A1 (en) * | 2006-04-26 | 2007-11-28 | BAUER Maschinen GmbH | Drill bit |
EP2146046A1 (en) | 2008-07-15 | 2010-01-20 | Marti Gründungstechnik AG | Drill head for a drilling device for creating drill holes in insufficiently stable foundation |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4227467A1 (en) | 2022-02-09 | 2023-08-16 | Marti Gründungstechnik AG | Drill head for drilling equipment for creating bores in a construction substrate |
Also Published As
Publication number | Publication date |
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PL3216974T3 (en) | 2019-05-31 |
LT3216974T (en) | 2019-03-12 |
EP3216974B1 (en) | 2018-12-26 |
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