Drill head and method for creating a vertical bore in the ground

Abstract

The invention relates to a drill head and a method for a substantially vertical borehole in the ground, in particular for creating a shaft, with a body (11) that can be connected to a rotary drive of a drilling device, with drilling tools (12) arranged on the body (11) for loosening the soil at a face (100) of the borehole, with a conveying device for transporting the loosened soil at the face (100) that can be connected to a suction unit for drawing in a conveying medium (90) via a conveying line (31), wherein the conveying device has an opening area (22) arranged on the body (11) with at least one opening (23) in the area of ​​the drilling tools (12) at the face.It is provided that at least one opening (23) of the opening area (22) is connected to a suction box (20) as part of the conveying device, which has a connection opening (29) at one end opposite the opening (23) for a connection to the conveying line (31), that at least one element is provided which exerts an acceleration on the loosened soil in the area of ​​the suction box, by which the soil loosened by the drilling tools (12) can be moved into the opening area (22) and / or through the opening (23) into the suction box (25), wherein the loosened soil (110) in the opening (23) and / or in the suction box (25) is captured by the conveying medium (90) and can be conveyed away by the suction unit via the conveying line (31).

Description

[0001] The invention relates to a drill head and a method for creating a substantially vertical borehole in the ground, in particular for creating a shaft, comprising a body that can be connected to a rotary drive of a drilling device, with drilling tools arranged on the body for loosening the soil at the borehole face, with a conveying device for transporting the loosened soil at the borehole face, which can be connected to a suction unit for drawing in a conveying medium via a conveying line, wherein the conveying device has an opening area arranged on the body with at least one opening in the area of ​​the drilling tools at the borehole face.

[0002] Such a drill head is known, for example, from US 4646853 A, EP 2597249 B1, US 3384191 A, US 4195700 A and US 4200160 A.

[0003] US 4646853 A discloses a device and a method for sinking a shaft. A cutting wheel rotatable about a vertical axis is provided for loosening the soil. A mechanical conveying system with buckets is provided for removing the loosened soil.

[0004] EP 2597249 B1 shows a drilling device for drilling vertical boreholes in the ground with a drill head that rotates on the borehole face. A suction system is provided, featuring an opening located on the outside of the end of the drill head facing the borehole face, which rotates with the drill head. This process removes loosened soil from the borehole.

[0005] US 3384191 A shows a drill head with roller bits, which also features a suction system for removing the excavated soil. For this purpose, a guide plate is provided, which is located in the area of ​​the suction opening and collects the excavated soil as the drill head rotates and feeds it into the opening. Behind the opening is an inclined channel that leads into a centrally located discharge pipe.

[0006] US 4195700 A also discloses a drill head with roller bits, which has a radial opening at the inner end of which a discharge pipe is provided. The opening is designed as a slot, behind which a conically shaped tube is provided that widens towards the discharge pipe.

[0007] US 4200160 A discloses a drill head with a suction system for removing the excavated soil. The suction system has a slot-shaped radial opening that leads into a cylindrical chamber. From this chamber, a channel extends into the sewer line.

[0008] The object of the invention is to simplify the extraction process in the aforementioned drill heads and at the same time to improve its performance.

[0009] The problem with regard to the drill head is solved by connecting at least one opening of the opening area to a suction box as part of the conveying device, which has a connection opening at one end opposite the opening for a connection to the conveying line, and by providing at least one element that exerts an acceleration on the loosened soil in the area of ​​the suction box, by which the soil loosened by the drilling tools can be moved into the opening area and / or through the opening into the suction box, wherein the loosened soil in the opening area, preferably in the opening and / or in the suction box, is captured by the conveying medium and can be conveyed away by the suction unit via the conveying line.

[0010] This makes it possible in a surprisingly simple way to remove the loosened soil, especially in the case of heavier, inert components that cannot be easily vacuumed up, while at the same time significantly increasing the suction performance.

[0011] A further teaching of the invention provides that the at least one element is at least one nozzle directed towards the opening area, which emits at least one jet of a transport medium to effect acceleration.

[0012] A further aspect of the invention provides that at least one deflection area is provided behind the opening, preferably before the inlet to the suction box, in which the flow direction of the loosened soil can be deflected. This makes it particularly easy to feed the material to be conveyed to the conveying system and then remove it.

[0013] A further aspect of the invention provides that at least one tool for loosening the soil, preferably in the form of a toothed bar, and / or for collecting the loosened soil is provided in the opening area. This allows rock / soil to be loosened / collected directly at the tunnel face in the opening area. The loosened / collected material can then be particularly well conveyed to the suction system.

[0014] Furthermore, it is advantageous that the at least one tool for changing the distance of the tool to the tunnel face is movable, preferably via at least one hydraulic cylinder, and / or that the at least one tool is pivotable relative to the opening area, preferably via at least one hydraulic cylinder.

[0015] A further aspect of the invention provides that the distance between the opening area and the tunnel face is adjustable. It is advantageous that the distance is adjusted by vertically moving the suction box and / or by pivoting the suction box about a pivot point, with a drive, preferably a hydraulic cylinder or a spring mechanism, being provided for the movement or pivoting. This allows the amount of material extracted to be directly and easily controlled.

[0016] A further aspect of the invention provides that the opening area is equipped with a cleaning tool, preferably at least one movable element and / or at least one nozzle for dispensing a medium, for example a gas (air) or a liquid (water, bentonite rinse). This allows blockages in the opening area to be either eliminated or prevented.

[0017] A further aspect of the invention provides that at least one flushing nozzle is provided with which soil loosened by at least one drilling tool can be transported to an area on the drilling face that is traversed by the suction box during drilling with the drill head. This improves the material transport to the suction box in a simple manner.

[0018] Another aspect of the invention provides that the suction box is interchangeable within the drill head. This allows the drill head to be easily adapted to different geological conditions. Furthermore, reversing the direction of rotation is also possible.

[0019] A further aspect of the invention provides for a classification element in the opening area. This can be, for example, a grid, separating plates that divide the opening area into several openings, or even multiple openings. This makes it possible to easily limit the particle size of the aspirated material.

[0020] Another aspect of the invention provides that the suction box is arranged essentially horizontally. This positively influences the material transport and intake within the suction box.

[0021] A further aspect of the invention provides that the opening area extends substantially radially outwards from the center point. It is advantageous that the opening is elongated or slot-like. A further aspect of the invention provides that the clear cross-section of the opening changes, preferably increases, along the opening area as it extends radially outwards. This allows for easy control of the material intake, its location, and the amount of material taken in.

[0022] Furthermore, it is advantageous that the connection opening of the suction box is offset from the perpendicular center line of the opening area, preferably towards the outside. This results in an asymmetrical design of the suction box. The suction strength or flow profile within the suction box or the opening area can be easily influenced, thus affecting the amount of material drawn in. For example, by shifting the connection opening outwards, the flow in the radially outer area of ​​the suction box can be increased to better extract the larger quantity of material accumulating there.

[0023] A further aspect of the invention provides that the connection opening of the suction box is pivoted relative to a perpendicular axis of the opening area. This allows for easy control of the suction strength or flow profile within the suction box or the opening area, thereby influencing the amount of material drawn in. For example, tilting the connection opening inwards can increase the flow in the radially outer region of the suction box, thus improving the suction of the larger quantity of material accumulating there.

[0024] A further aspect of the invention provides that the suction box has at least one nozzle inside. This allows for a simple improvement in the movement of the loosened soil / rock for capture by the conveying medium.

[0025] A further aspect of the invention provides that the conveying medium and / or the transport medium is a liquid or gaseous medium, preferably water, a bentonite suspension, or air. A particularly preferred combination is that the conveying medium is air and the transport medium is air or a liquid, preferably water. This is applicable when the drill head is not / should not / cannot be flooded, thus precluding liquid-based conveying. It has surprisingly been found that the loosened soil / rock is readily transportable / activated by the emitted jet and can be advantageously fed into and removed from the air flow.

[0026] A further teaching of the invention provides that the at least one element is at least one driven rotating element with at least one impact element arranged thereon, wherein the at least one impact element causes the acceleration of the loosened soil via a contact by means of a rotational movement.

[0027] An advantage of this is that the striking element is movable on a striking circle that is provided concentrically around the rotating element.

[0028] A further teaching of the invention provides that the at least one striking element is movably arranged on the at least one rotating element, preferably via a joint.

[0029] Another teaching of the invention provides that the at least one striking element is a hammer, a sword, a rope, a chain, a brush element, or a chisel.

[0030] Another teaching of the invention provides that the rotation of at least one rotating element is speed-controllable.

[0031] Another teaching of the invention provides that the at least one striking element causes the loosened soil to be crushed.

[0032] Another teaching of the invention provides that the suction box is provided horizontally, inclined and / or vertically.

[0033] The problem according to the invention is further solved by a method for creating a substantially vertical borehole in the ground, in particular for creating a shaft, with a drill head, in particular with a drill head described above, wherein the drill head is connected to a rotary drive of a drilling device, wherein the drill head has a body on which drilling tools are arranged, with which, during drilling, the soil at a face of the borehole is loosened and crushed to a conveyable size, wherein the loosened and crushed soil is transported away from the face by a conveying device, which is connected to a suction unit for drawing in a conveying medium via a conveying line, wherein the conveying device has a suction box with an opening area having at least one opening in the area of ​​the drilling tools at the face, comprising the steps of: Introducing an acceleration into loosened soil located in the area of ​​the opening, and capturing the loosened soil from a conveying medium and conveying it away through the suction unit via the conveying line.

[0034] Another teaching of the invention provides that the loosened soil is moved through the opening into the suction box by the applied acceleration.

[0035] Another teaching of the invention provides that the capture takes place in the suction box and / or in the opening area, preferably in front of the opening.

[0036] Another teaching of the invention provides that the acceleration is achieved by emitting a jet of a transport medium from a nozzle that is directed into the opening area of ​​the suction box as part of the conveying device.

[0037] Another teaching of the invention provides that the movement of the loosened soil is carried out by the transport medium.

[0038] Alternatively or additionally, it is further provided that the acceleration is effected by at least one driven rotating element with at least one impact element arranged on it, wherein the at least one impact element causes the acceleration of the loosened soil via contact by means of a rotational movement.

[0039] Another teaching of the invention provides that the movement of the loosened soil is carried out by the striking element.

[0040] As previously described, the advantage here is that the conveying medium and / or the transport medium is a liquid or gaseous medium, preferably water, a bentonite suspension or air.

[0041] The terms soil and rock are used synonymously in this application. The same applies to loosened soil and drill cuttings.

[0042] The invention is explained in more detail below with reference to exemplary embodiments in conjunction with a drawing. The drawings show: Figure 1 shows a spatial view of the underside of the drill head according to the invention in the first embodiment, Figure 2 shows a schematic section sketch of Figure 1 of a first embodiment of the invention, Figure 3 a schematic partial sectional view in top view to Figure 2 Figure 4 shows a schematic representation of alternative drill head shapes according to the invention, Figure 5 shows a schematic partial spatial view of Figure 1 Figure 6 shows another schematic spatial, partially cutaway view of Figure 1 Figure 7 shows another schematic spatial, partially cutaway view. Figure 1 Figure 8 shows a first schematic diagram regarding the conveyance according to the invention in conjunction with a drill head according to Figure 1Figure 9 shows a second schematic diagram regarding the conveying process according to the invention in conjunction with a drill head according to Figure 1 Figure 10 is a schematic side view of a first arrangement of a suction box in a drill head according to the invention, Figure 11 is a schematic side view of a second arrangement of a suction box in a drill head according to the invention, Figure 12 is a partial sectional view of Figure 11 Figure 13 shows a schematic side view of a preparation in a drilling device with a drill head according to the invention, Figure 14 shows a sectional view of a second embodiment of the invention, Figure 15 shows a sectional view rotated by 90°. Figure 14 , and Figure 16 alternative drill head profiles to Figure 14 .

[0043] Figure 1Figure 1 shows a three-dimensional representation of a drill head 10 according to the invention in its first embodiment. The drill head 10 has a body 11 on which 13 drilling tools 12 are arranged on its underside. On its upper side 14, the drill head 10 has a connection (not shown) for a drive (not shown) of a drilling device (not shown). The drive (not shown) is, for example, provided directly in the drilling device, such as a shaft drilling machine. Other variants of drives, drilling devices, and arrangements, for example in a borehole / pile / casing, are also possible.

[0044] The underside 13 has a ring section 15, which is flat here (other shapes are possible), to which drilling tools 12 are provided on its underside 16.

[0045] Extending outwards from the ring section are arms, for example 8 arms 17, each with a flat flank 18. Broaching tools 19 and wear elements 40 can be provided on the flanks. Alternatively, the flanks 18 can also be fully circumferential.

[0046] In the center of the underside 13, for example, a recess 41 is provided, which has, for example, a flat surface 42 and flanks 43, on which drilling tools 12 are also provided.

[0047] The drill head shape described here is also known as a W-type drill head. The corresponding drill profile is described in the Figure 8 and 9 The width of the planar ring section 15, the angles of the inner and outer flanks 43, 18, and the size of the inner surface 42 are variable and depend on the mining conditions, as also shown in Figure 16 is shown.

[0048] The drilling tools 12 can be, for example, disc chisels 12a, peeling chisels or peeling knives 12b, roller chisels 12c, or other alternatives. The selection of the drilling tools 12 depends on the soil / rock to be loosened for creating the borehole.

[0049] On its upper side 14 is in Figure 1 Connection 45 of the delivery line 31 is shown.

[0050] Furthermore, the body 11 has a suction box 20 on its underside 13 of the W-drill head 10 at the ring section 15.

[0051] Alternative arrangements of the suction box 20 are in Figure 4 shown. The suction box 20 is located, for example, in the deepest part of the borehole (left in the invention) when using a conical or V-shaped drill head. Figure 4 ) or extends and is radially provided in a flat drill head (right in Figure 4 ). In the middle of Figure 4A W-shaped drill head is shown. Besides horizontal suction boxes, such as those in... Fig. 4 Also shown are possible versions in which the suction box 20 is inclined or vertical and, for example, its opening 23 is directed downwards towards the tunnel face 100.

[0052] The suction box 20 in a first embodiment, as it is used, for example, in Fig. 2 The first embodiment of the suction box 20 has an opening area 22 on its front face 21, which has at least one opening 23. The opening 23 of the first embodiment of the suction box 20 has a classification element 24 that divides the opening 23 into opening sections 23a. The classification element 24 determines the grain size of the loosened soil / rock that can enter the interior 25 of the suction box 20.

[0053] The interior 25 is formed by a lid 26 as the top and a base 27 as the bottom, which in this embodiment are planar. Other shapes for the lid and base are also possible. Furthermore, the suction box 20 has side walls 28, which here extend from the front 21 along the shape of the lid and the base.

[0054] The shape of the lid 26, the base 27, and the side walls 28 determines the shape of the interior 25 of the suction box 20. This can be a box-like structure. Alternatively, it can be funnel-shaped if the width of the interior 25 decreases, for example, due to a curved shape of the side walls 28, thereby increasing the flow velocity of the injected mixture of dissolved soil / rock and carrier medium with decreasing width.

[0055] An opening 29 is provided on the rear of the interior 25, on which a connection 30 is provided for a conveying capacity 31, which is connected to a suction unit / pump (not shown) in drilling operation in order to convey the loosened soil / rock or the mixture of conveying medium and loosened soil / rock.

[0056] Additionally, and not shown here, the height of the interior 25 of the suction box 20 can also be varied, in particular increased, starting from the front 21 towards the opening 29 at the rear of the suction box 20, in order to counteract blockages of the interior 25 by loosened soil / rock.

[0057] Furthermore, it is also possible to design the suction box 20, shown here symmetrically, asymmetrically, for example by arranging the opening 29 laterally offset (not shown). In this case, it can be particularly advantageous, for example with a flat drill head, if the extension of the opening area 22 is longer, to position the opening 29 offset towards the outer circumference of the body 11 in order to selectively increase the flow velocity in the areas where more soil / rock is loosened during the rotation of the drill head and enters the interior 25 of the suction box 20 through the opening 23.

[0058] The same is also possible if the connection 30 of the delivery capacity 31 (not shown) opens at an angle into the interior 25.

[0059] The opening area 22 can have soil loosening tools and / or soil picking tools 33, such as peeling knives or scrapers, in the area of ​​the opening 23, which extends along the front face 21. By providing such tools, it is possible to selectively loosen and / or pick up soil / rock in the area of ​​the front face 21 of the suction box 20 and feed it to the opening 23 of the suction box 20.

[0060] Additionally or alternatively, guide plates can also be provided on the underside 13 of the drill head 10 (not shown), which feed loosened material to the opening area 22. The feeding can be supported by nozzles such as flushing nozzles 32.

[0061] Fig. 2 and Figure 3Figure 1 shows a section of the drill head 10 according to the invention, comprising a suction box 20 with an opening 23 and nozzles 34 directed thereto for dispensing a transport medium 80, preferably air or a liquid such as water or bentonite slurry. The transport medium 90 is drawn in through the conveying line 31, which is connected to the suction box 20 via the opening 29 and the connection 30. Loosened soil 110 is accelerated by the transport medium jet 81 and transported through the opening 23. There, the loosened soil 110 is captured by the transport medium 90. The loosened soil 110, the transport medium 90, and the transport medium 80 mix to form a conveying stream 120, which is then conveyed away via the conveying line. Additionally or alternatively, the acceleration of the transport medium jet 81 causes a turbulence or...a loosening of the loosened soil 110 from the tunnel face 100 in the opening area 22, so that the stirred-up loosened soil is already captured there by the conveying medium 90 and conveyed away with the conveying medium as conveying stream 120.

[0062] Figure 5 shows an arm 17 of the drill head 10 in a W-shape according to Figure 1 with drilling tools 12 arranged thereon as disks 12a and with chisels on the side flanks 18 and on the flanks 43 on the underside 13.

[0063] The drilling tools 12 arranged on the arms 17 can be changed from inside the arms 17.

[0064] Figure 6 shows an arm 17 of the drill head 10 in a W-shape according to Figure 1 with suction box 20 and connected delivery line 31, which are provided within the arm 17. For the sake of simplicity, in Figure 6No drilling tools 12, 12a are shown. Flushing nozzles 32 are provided in the area of ​​the reaming tool 19, which are oriented towards the opening 23 of the suction box 20. These emit a flushing jet 130. Preferably, the same medium as the transport medium can be used as the flushing medium. The flushing jet 130 transports the loosened drill cuttings 110 into the opening area 22 or towards the deepest part 140 of the borehole. In this area, the loosened soil 110 is then fed by the nozzles 34 to the opening 23 of the flushing box 20, as shown in Fig. 7 shown.

[0065] The process of soil loosening and removal of the loosened soil is described in Figure 8 and 9 for example in conjunction with a drill head 10 after Figure 1The soil is loosened by drilling tools 12 and is located in the area of ​​the respective drilling tools. Preferably, flushing nozzles 32 are provided in the area of ​​the respective drilling tools 12. These emit a flushing jet 130, which flushes the loosened soil 110 into the area of ​​the deepest part of the borehole 140. In this area, the suction box 20 with its opening 23 is moved. The transport medium jet 81 is then emitted via the nozzles 34 in the opening area 23, accelerating the loosened soil into the opening 22 and thus moving it for transport into the flushing box 20, and / or it is directly suctioned out through the suction box 20 in the opening area 22.

[0066] The movement / acceleration of the drill cuttings into the suction box 20 can be additionally supported by mechanical tools.

[0067] Figure 10Figure 2 shows the introduction of loosened soil into the suction box, the opening 29 of which, or connection 30 to the conveying line 31, is located behind the opening area 22. A mechanical aid for intake by means of a receiving tool 33 is shown. The suction box 20 can be pivoted about a pivot point 36 by means of a cylinder 35. The nozzles 34 are not shown here.

[0068] In Figure 11 and 12 The introduction of loosened soil into the suction box 20 is shown, the opening 29 of which, or connection 30 to the conveying line 31, is provided in front of the opening area 22. A mechanical aid for the intake by means of a receiving tool 33 is shown. The suction box 20 can be pivoted about a pivot point 36 by means of a cylinder 35. This allows the suction box to be moved in the direction of arrow A, so that the distance 36 to the tunnel face 100 changes. Figure 12The arrangement of the nozzles 34 is shown. A first nozzle 34 is provided, which is directed towards the deflecting or receiving tool 33. Furthermore, a second nozzle 34' is provided, which is directed towards the opening 29 and the connection 30. The loosened soil 110 is fed to the conveying medium 120 through the two nozzles 34 and 34' and conveyed away together with it.

[0069] The conveyed stream via conveying line 31 consists of a combination of solid components (dissolved soil 110) as well as liquid and / or gaseous components. These are fed via conveying line 31 to a processing unit 200 (see Figure 13Here, the components are separated from one another, for example, using at least one cyclone, liquid and / or dust separators. The gaseous components (air) are returned to the drilling area (for example, the already drilled shaft). The liquid components are, if necessary, returned to nozzles 32, 34, and 34' or pumped from the drilling area to the surface. The solid components are also removed from the drilling area to the surface using suitable means.

[0070] Alternatively or additionally to introducing the acceleration into the loosened soil by means of nozzles and a transport medium, a second embodiment of the invention according to the Figures 14-16 a mechanical acceleration input. For this purpose, a percussion device 50 is provided, which is located inwards in the area of ​​the suction box 20 in the drill head 10, but can accelerate the loosened soil 110 in the area of ​​the tunnel face 100.

[0071] A rotating element 51 is provided in a housing 57, around which several impact elements 52 are arranged, preferably movably via a joint 53. The impact elements 52 move on an impact circle 54 provided concentrically around the rotating element 51. The rotating element 51 is driven by a drive (not shown). In an impact zone 55, the impact elements 52 strike loosened soil, which is then introduced in the impact direction 56 into the suction box 20 or into its opening 23. In the interior 25 therein and / or in the opening zone 22, the accelerated loosened soil is then picked up by the conveying medium 90 and conveyed away through the conveying line 31 with the conveying flow 120.

[0072] Figure 15 and Figure 16 show different arrangement widths of the impact device 50 in connection with the flanks 18, 43 of the drill head 10.

[0073] It is advantageous here to make the striking device as wide as possible (50). Figure 16 to be carried out (below) in order to achieve better drainage performance.

[0074] A further advantage here is that flanks 18 and 43, as in Figure 16 shown above, compared to the representations in Figure 15 and Figure 16 The bottom can be relatively steep and short, so that under certain circumstances even a flank flushing, here in the form of an airflow or in the form of clearing elements (not shown), can be omitted.

[0075] Further preferred embodiments regarding the drill head and the method are listed below: 1. Drill head for creating a substantially vertical borehole in the ground, in particular for creating a shaft, comprising a body (11) that can be connected to a rotary drive of a drilling device, with drilling tools (12) arranged on the body (11) for loosening the soil at a face (100) of the borehole, with a conveying device for transporting the loosened soil at the face (100) that can be connected to a suction unit for drawing in a conveying medium via a conveying line (31), wherein the conveying device has an opening area (22) arranged on the body (11) with at least one opening (23) in the area of ​​the drilling tools (12) at the face (100), characterized in that the at least one opening (23) of the opening area (22) is connected to a suction box (20) as part of the conveying device.The drill head has a connection opening (29) at one end opposite the opening (23) for connection to the conveying line (31), and at least one element is provided which exerts an acceleration on the loosened soil in the area of ​​the suction box (20), by which the soil (110) loosened by the drilling tools (12) can be moved into the opening area (22) and / or through the opening (23) into the suction box (25), wherein the loosened soil (110) is captured by the conveying medium (90) in the opening area (22) and / or in the suction box (25) and can be conveyed away by the suction unit via the conveying line (31). 2. Drill head according to embodiment 1, characterized in that the at least one element is at least one nozzle (34) which is directed towards the opening area (22) and which emits at least one jet (81) of a transport medium (80) to effect the acceleration. 3. Drill head according to embodiment 1 or 2, characterized in that,that at least one tool for loosening the soil, preferably in the form of a toothed strip, and / or for collecting loosened soil is provided in the opening area (22). 4. Drill head according to embodiment 3, characterized in that the at least one tool is movable for changing the distance of the tool to the tunnel face (100), and / or that the at least one tool is pivotable relative to the opening area (22). 5. Drill head according to one of embodiments 1 to 4, characterized in that the distance of the opening area (22) to the tunnel face (100) is adjustable. 6. Drill head according to embodiment 5, characterized in that the adjustment of the distance is effected by vertically moving the suction box (20) and / or by pivoting the suction box (20) about a pivot point, wherein a drive is provided for moving or pivoting. 7. Drill head according to one of embodiments 1 to 6, characterized in thatthat at least one deflection area, preferably before the inlet to the suction box (20), is provided behind the opening (23) in which the flow direction of the loosened soil (110) can be deflected. 8. Drill head according to one of the embodiments 1 to 7, characterized in that the opening area (22) has an elongated extension. 9. Drill head according to one of the embodiments 1 to 8, characterized in that at least one flushing nozzle (32) is provided with which soil loosened by at least one drilling tool (12) can be transported into an area on the drilling face (100) that is traversed by the suction box (20) during drilling with the drill head (10). 10. Drill head according to one of the embodiments 1 to 9, characterized in that the suction box (20) has at least one nozzle (34a) in the interior (25). 11. Drill head according to one of the embodiments 1 to 10, characterized in thatthat the conveying medium (90) and / or the transport medium (80) is a liquid or gaseous medium, preferably water, a bentonite suspension, or air. 12. Drill head according to one of embodiments 1 to 11, characterized in that the at least one element is at least one driven rotating element (51) with at least one percussion element (52) arranged thereon, wherein the at least one percussion element (52) causes the acceleration of the loosened soil (110) via contact by means of a rotational movement. 13. Drill head according to embodiment 12, characterized in that the percussion element (52) is movable on a percussion circle (54) which is provided concentrically around the rotating element (51). 14. Drill head according to embodiment 12 or 13, characterized in thatthat the at least one impact element (52) is movably arranged on the at least one rotation element (51). 15. Drill head according to one of the embodiments 12 to 14, characterized in that the at least one impact element (52) is a hammer, a sword, a rope, a chain, a brush element, or a chisel. 16. Drill head according to one of the embodiments 12 to 15, characterized in that the rotation of the at least one rotation element (51) is speed-controlled. 17. Drill head according to one of the embodiments 12 to 16, characterized in that the at least one impact element (52) causes the loosened soil (110) to be crushed. 18. Drill head according to one of the embodiments 1 to 17, characterized in that the suction box (20) is horizontal,inclined and / or vertically designed. 19. Device for sinking a shaft with a drill head (10) according to one of embodiments 1 to 18. 20. Method for creating a substantially vertical borehole in the ground, in particular for creating a shaft, with a drill head, in particular with a drill head (10) described above, wherein the drill head (10) is connected to a rotary drive of a drilling device, wherein the drill head (10) has a body (11) on which drilling tools (12) are arranged, with which, during drilling, the soil at a face (100) of the borehole is loosened and crushed to a conveyable size, wherein the loosened and crushed soil (110) is transported away from the face (100) by a conveying device, which is connected to a suction unit for drawing in a conveying medium (90) via a conveying line (31).wherein the conveying device comprises a suction box (20) with an opening area (22) having at least one opening (23) in the area of ​​the drilling tools (12) at the drilling face (100), comprising the steps of: introducing an acceleration into loosened soil (110) located in the area of ​​the opening area (22), and capturing the loosened soil (110) by a conveying medium (90) and conveying it by the suction unit via the conveying line (31). 21. Method according to embodiment 20, characterized in that the loosened soil (110) is moved through the opening (23) into the suction box (20) by the introduced acceleration. 22. Method according to embodiment 20 or 21, characterized in that the capturing takes place in the suction box (20) and / or in the opening area (22). 23. Method according to one of the embodiments 20 to 22, characterized in that the acceleration is effected by the discharge of a jet (81) of a transport medium from a nozzle (34),which is directed into the opening area (22) of the suction box (20) as part of the conveying device. 24. Method according to embodiment 23, characterized in that the movement of the loosened soil (110) is effected by the transport medium (80). 25. Method according to one of embodiments 20 to 24, characterized in that the acceleration is effected by at least one driven rotating element (51) with at least one impact element (52) arranged thereon, wherein the at least one impact element (52) causes the acceleration of the loosened soil via contact by means of a rotational movement. 26. Method according to embodiment 25, characterized in that the movement of the loosened soil (110) is effected by the impact element (52). 27. Method according to one of embodiments 20 to 26, characterized in that the conveying medium and / or the transport medium is a liquid or gaseous medium,preferably water, a bentonite suspension, or air. Reference symbol list:

[0076] 10 Drill head 35 cylinder 11 Body 36 pivot point 12 Drilling tool 37 Distance 12a disc chisel 40 Wear element 12b Schällmeißel 41 in-depth 12c roller chisel 42 Area 13 bottom 43 flank 14 Top 45 Connection 15 Ring section 16 bottom 50 Impact device 17 arm 51 Rotating element 18 flank 52 Impact element 19 Clearing tool 53 joint 20 Suction box 54 Percussion circle 21 front 55 Impact area 22 Opening area 56 Direction of impact 23 opening 57 Housing 23a Opening section 58 Direction of rotation 24 Classification element 25 interior 80 transport medium 26 Lid 81 Transport medium jet 27 Floor 90 Funding medium 28 side wall 100 working face 29 opening 110 loosened soil 30 Connection 120 Flow 31 conveyor line 130 Flushing jet 32 spray nozzle 140 Deepest borehole 33 Soil removal tool / soil removal tool 200 Processing 34, 34' nozzle

Claims

1. Drilling head for creating a substantially vertical borehole in the ground, in particular for creating a shaft, with a body (11) that can be connected to a rotary drive of a drilling device, with drilling tools (12) arranged on the body (11) for loosening the soil at a working face (100) of the bore, with a removal device for removing the loosened soil at the working face (100), which can be connected to a suction unit for sucking in a conveying medium via a conveying line (31), wherein the removal device has an opening region (22) arranged on the body (11) with at least one opening (23) in the region of the drilling tools (12) at the working face (100), characterized in thatthe at least one opening (23) of the opening region (22) is connected to a suction box (20) as a component of the removal device, which suction box has a connection opening (29) for connection to the delivery line (31) at an end opposite the opening (23), that at least one element is provided which exerts an acceleration on the loosened soil in the region of the suction box (20), by means of which acceleration the soil (110) loosened by the drilling tools (12) can be moved into the opening region (22) and / or through the opening (23) into the suction box (20), wherein the loosened soil (110) in the opening region (22) and / or in the suction box (20) is grasped by the conveying medium (90) and can be conveyed away by the suction unit via the delivery line (31).

2. Drill head according to claim 1, characterized in thatthe at least one element is at least one nozzle (34) which is provided directed into the opening region (22) and which emits at least one jet (81) of a transport medium (80) for effecting the acceleration.

3. Drill head according to claim 1 or 2, characterized in that in the opening area (22) at least one tool for loosening the soil, preferably in the form of a toothed strip, and / or for picking up loosened soil is provided, wherein particularly preferably the at least one tool is movable to change the distance of the tool from the working face (100), and / or that the at least one tool is pivotable relative to the opening area (22).

4. Drill head according to one of claims 1 to 3, characterized in thatthe distance of the opening region (22) to the working face (100) is adjustable, wherein the adjustment of the distance is particularly preferably carried out by vertically moving the suction box (20) and / or by pivoting the suction box (20) about a pivot point, wherein a drive is provided for the movement or pivoting.

5. Drill head according to one of claims 1 to 6, characterized in thatthe suction box (20) is provided horizontally, inclined and / or vertically, and / or that behind the opening (23) at least one deflection region is provided, preferably before the entry into the suction box (20), in which the flow direction of the loosened soil (110) can be deflected and / or that the opening region (22) has an elongated extension, and / or at least one flushing nozzle (32) is provided, with which soil loosened by at least one drilling tool (12) can be transported into an area on the working face (100) over which the suction box (20) travels during drilling with the drill head (10), and / or the suction box (20) has at least one nozzle (34a) in the interior space (25), and / or that the conveying medium (90) and / or the transport medium (80) is a liquid or gaseous medium, preferably water, a bentonite suspension or air.

6. Drill head according to one of claims 1 to 11, characterized in thatthe at least one element is at least one driven rotary element (51) with at least one impact element (52) arranged thereon, wherein the at least one impact element (52) causes the acceleration of the loosened soil (110) via a contact by means of a rotational movement, wherein the impact element (52) is preferably movable on an impact circle (54) which is provided concentrically around the rotary element (51).

7. Drill head according to claim 6, characterized in that the at least one impact element (52) is movably arranged on the at least one rotation element (51), and / or that the at least one impact element (52) is a hammer, a sword, a rope, a chain, a brush element, or a chisel, and / or that the rotation of the at least one rotation element (51) is speed-regulated, and / or that the at least one impact element (52) causes the loosened soil (110) to be crushed.

8. Drill head according to one of claims 1 to 7, characterized in that the drill head (10) has on its underside (13) a flat ring section (15) on which drilling tools (12) are provided on the underside (16) of the drill head.

9. Drill head according to claim 8, characterized in that the body (11) has the suction box (20) on its underside (13) of the drill head (10) on the ring section (15).

10. Drill head according to claim 8 or 9, characterized in that arms (17) extend outwards from the ring section (15), each of which preferably has a flat flank (18), wherein broaching tools (19) and wear elements (40) are preferably provided on the flanks (18), or that full-surface flanks (18) extend outwards from the ring section (15) 11. Drill head according to one of claims 8 to 10, characterized in thatin the center of the underside (13) there is a recess (41) which preferably has a flat surface (42) and flanks (43) on which drilling tools (12) are provided.

12. Drill head according to one of claims 9 to 11, characterized in that in the area of ​​the clearing tool (19) flushing nozzles (32) are provided, which are directed in the direction of an opening (23) of the suction box (20) and emit a flushing jet (130) with which the loosened drilling cuttings (110) are transported into an opening area (22) of the suction box (20).

13. Device for sinking a shaft with a drill head (10) according to one of claims 1 to 12.

14. A method for creating a substantially vertical borehole in the ground, in particular for creating a shaft, with a drill head, in particular with a previously described drill head (10), wherein the drill head (10) is connected to a rotary drive of a drilling device, wherein the drill head (10) has a body (11) on which drilling tools (12) are arranged, with which the soil at a working face (100) of the bore is loosened and crushed to a size that can be removed during drilling, wherein the loosened and crushed soil (110) is transported away from the working face (100) by a removal device that is connected to a suction unit for sucking in a conveying medium (90) via a conveying line (31), wherein the removal device has a suction box (20) with an opening region (22) with at least one opening (23) in the region of the drilling tools (12) at the working face (100),with the steps: • introducing an acceleration into loosened soil (110) located in the area of ​​the opening area (22), and • capturing the loosened soil (110) by a conveying medium (90) and conveying it away by the suction unit via the conveying line (31)., 15. Method according to claim 11, characterized in thatthe loosened soil (110) is moved through the opening (23) into the suction box (20) by the introduced acceleration, and / or that the conveying medium and / or the transport medium is a liquid or gaseous medium, preferably water, a bentonite suspension or air, and / or that the capture takes place in the suction box (20) and / or in the opening area (22), and / or that the acceleration takes place by emitting a jet (81) of a transport medium from a nozzle (34) which is directed into the opening area (22) of the suction box (20) as a component of the removal device, wherein the movement of the loosened soil (110) preferably takes place through the transport medium (80), and / or that the acceleration takes place by at least one driven rotary element (51) with at least one impact element (52) arranged thereon,wherein the at least one impact element (52) causes the acceleration of the loosened soil via a contact by a rotational movement, wherein the movement of the loosened soil (110) is preferably carried out by the impact element (52).

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