Arrangement of a ground drilling device, method for operating a ground drilling device and use of an arrangement of a ground drilling device

Abstract

Arrangement of a ground drilling device for the pushing or pulling introduction of a drill string into the ground, wherein the arrangement has a frame and a carriage which can be moved back and forth relative to the frame with a translatory movement, wherein at least one rolling element is provided, which is configured to roll during the translatory movement of the carriage, and a conversion device is provided, which is connected to the rolling element and is configured to convert the rotary movement of the rolling element into a rotary movement of the drill string.

Claims

1. A ground drilling device (1) comprising a frame (8) and a carriage (4) which can be moved back and forth relative to the frame (8) with a translatory movement, wherein at least one rolling element (15) is provided, the at least one rolling element configured to roll, with rotary movement, during the translatory movement of the carriage (4), wherein the rotary movement of the rolling element (15) is converted into a rotary movement of a drill string (5), wherein the ground drilling device introduces the drill string (5) into the ground by a pushing or pulling movement.

2. The ground drilling device according to claim 1, wherein a counter-element (14) is provided which is in contact with the rolling element (15) and on which the rolling element (15) rolls.

3. The ground drilling device according to claim 2, wherein the rolling element (15) is mounted on the carriage (4), and the counter-element (14) is arranged in a stationary manner outside of the carriage (4).

4. The ground drilling device according to claim 2, wherein the rolling element (15) is a wheel, the counter-element (14) is a linear drive element, or both the rolling element (15) is a wheel and the counter-element (14) is a linear drive element.

5. The ground drilling device according to claim 1, wherein the rolling element (15) has an axis of rotation which runs transversely to the translatory movement of the carriage (4).

6. The ground drilling device according to claim 1, wherein the rolling element (15) is arranged to be moved transversely to the axis of rotation when rolling or to be moved along the axis of rotation when rolling.

7. The ground drilling device according to claim 1, wherein further comprising a conversion device (24) that is connected to the rolling element (15) and configured to convert the rotary movement of the rolling element (15) into a rotary movement of the drill string (5).

8. The ground drilling device according to claim 7, wherein the conversion device (24) has a drive element which is at least indirectly engaged with the rolling element (15) and a driven element which is at least indirectly engaged with the drill string (5).

9. The ground drilling device according to claim 8, wherein the driven element is a toothed belt pulley (16, 19) or a bevel gear (22, 23), the drive element is a toothed belt pulley (16, 19) or a bevel gear (22, 23), or both the driven element is a toothed belt pulley (16, 19) or a bevel gear (22, 23) and the drive element is a toothed belt pulley (16, 19) or a bevel gear (22, 23).

10. (canceled)

11. A method of operating a ground drilling device (1), comprising moving a carriage (4) of the ground drilling device (1) back and forth relative to a frame (8) with a translatory movement in order to drive a drill string (5) in a pushing or pulling working direction into the ground, wherein a rolling element (15) rolls, with rotary movement, during the translatory movement and the rotary movement of the rolling element (15) is converted into a rotary movement of the drill string (5).

12. A method of using a ground drilling device (1) for the pushing or pulling introduction of a drill string (5) into the ground, wherein the arrangement has a frame (8) and a carriage (4) which can be moved back and forth relative to the frame (8) with a translatory movement, wherein at least one rolling element (15) is used, wherein the at least one rolling element rolls during the translatory movement, and the rolling movement is used to impart a rotary movement to the drill string (5) by means of the rotary movement of the rolling element (15).

Description

[0050] The invention is explained in more detail below with reference to an embodiment shown in the drawings, in which:

[0051] FIG. 1 is a plan view of an arrangement of a ground drilling device and a drill string;

[0052] FIG. 2 is an enlarged representation of FIG. 1 of the region marked in FIG. 1 with a dot-dash circle;

[0053] FIG. 3 is a further embodiment of an arrangement of a ground drilling device with a drill string in plan view.

[0054] FIG. 1 shows an arrangement of a ground drilling device 1 in a plan view. For anchoring or stabilizing the ground drilling device 1 in a starting excavation or a duct manhole, the ground drilling device 1 has extendable or telescopic support elements 2 which are arranged in the corner regions of a frame 8 of the ground drilling device 1.

[0055] A drill string 5 having rod sections can be introduced into the ground by means of the ground drilling device 1. In the embodiment shown, the drill string 5 has a ground drilling tool in the form of a drill head 6 arranged at the front side. A transmitter receptacle 7 is arranged in the drill string 5 behind the drill head 6.

[0056] For the pushing or pulling introduction of the drill string 5, two hydraulic cylinders 3 are provided, which hydraulic cylinders move an engagement element 10 back and forth, which engagement element is configured as a pawl and can be connected to the drill string 5. The engagement element 10 is fastened to a carriage 4. The engagement element 10 is fastened to the carriage 4 in such a way that a change in the working direction is possible. For this purpose, the engagement element 10 can be rotated. The carriage 4 can move relative to the frame 8 by means of an operation of the hydraulic cylinders 3. This allows a translatory movement of the carriage 4 relative to the frame 8 in a back-and-forth movement. In the illustrated embodiment, a fixed point for a detachable attachment of the hydraulic cylinder 3 is provided on a front frame plate 9 and on a rear frame plate 11.

[0057] To move the drill string 5, the engagement element 10 pushes itself out of a groove 12 of a rod section of the drill string 5 during a retraction (idle stroke) and falls into another groove 12 of a rod section when it reaches it, so that the hydraulic cylinders 3 can advance the drill string 5 further in one working stroke. For a pulling working direction (not shown) of the hydraulic cylinders 3, such as may be required for pulling in lines, the hydraulic cylinders 3 are rotated transversely to their longitudinal direction. It is possible that the cylinder or piston side of the hydraulic cylinder 3 with the greater force is available for the working stroke and the piston rod side can be used for a quick return stroke, i.e. the idle stroke.

[0058] The region marked with a dot-dash circle 13 in FIG. 1 is shown enlarged in FIG. 2.

[0059] In order to generate a rotary movement of the drill string 5, the arrangement of the ground drilling device 1 has a rolling element 15 which is configured as a chain wheel in the embodiment of FIG. 1. The rolling element 15 is mounted on the carriage 4 with a shaft which is non-rotatably connected to the rolling element 15 and rolls during the translatory movement of the carriage 4. The rolling takes place on a counter-element 14 configured as a roller chain. The rolling element 15 engages in the counter-element 14. The rolling element 15 is rotated by means of the back-and-forth movement of the carriage 4.

[0060] A conversion device 24 is provided, which conversion device has a toothed belt pulley 16 (drive element) which is non-rotatably connected to the rolling element 15 and which drives a toothed belt 17. The toothed belt 17 is rotated by means of a deflection roller 18 on the one hand in the longitudinal direction thereof by 90 degrees and on the other hand is continued in an angled manner by 90 degrees, where it drives another toothed belt pulley 19 (driven element). The toothed belt pulley 19 is non-rotatably connected to a receptacle 20 for the drill string 5. The receptacle 20, which is coupled to the toothed belt pulley 19, rotates the drill string 5 when it is acted upon by the conversion device 24.

[0061] By means of the rolling element 15 and the conversion device 24 which has the driven element (toothed belt pulley 19) and the drive element (toothed belt pulleys 16), a translatory movement of the carriage 4 triggered by the hydraulic cylinder 3 can be converted into a rotary movement of the drill string 5. The drill string 5 having the drill head 6 at the front end thereof can be rotated during the pushing or pulling introduction.

[0062] By means of the rotary movement of the drill string 5, directional drilling can be achieved in such a way that the drill head 6 is brought into a specific radial position (clock time) associated with the desired change in direction. This can arise, for example, in that the carriage 4 is brought into a position in which the drill head assumes the desired radial position in terms of its time. A clutch can separate the non-rotatable connection between the driven toothed belt pulley 19 (driven element) and the receptacle 20 (engagement element for the rotary movement), so that the drill head 6 no longer rotates during further advance in order to carry out the change of direction, i.e. the drill string 5 remains in the steering direction.

[0063] In a further embodiment (not shown), the engagement of the rolling element 15 with the counter-element 14 can be separated, for example by the rolling element 15 being moved or pivoted out of engagement with the counter-element 14. It can also be provided that the engagement of the rolling element 15 with the counter-element 14 can be achieved by lowering or raising or pivoting the counter-element 14 away. After the end of the change in direction of the drilling process, the original state can be restored, so that the drill string 5 with the drill head 6 rotates again during the linear movement of the carriage 4.

[0064] FIG. 3 shows an alternative embodiment of an arrangement of a ground drilling device 1 with the ground drilling device 1 and a drill string 5 in a plan view. The same elements are provided with the same reference signs, and substantially the toothed belt drive of the conversion device 24 from FIG. 1 has been replaced by a bevel gear drive. The counter-element 14 is designed as a roller chain and, during the linear movement of the carriage 4, causes the rotation of the rolling element 15 which is configured as a chain wheel. The rolling element 15 configured as a chain wheel is non-rotatably connected via a shaft 21 to a bevel gear 22 designed as a pinion of a conversion device 24 designed as a bevel gear and drives the bevel gear 23 of the conversion device 24, which in turn is non-rotatably connected to the receptacle 20 for the drill string 5, and thus drives the drill string 5 having the drill head 6. The rotary movement is interrupted in a manner analogous to that already described for the embodiment in FIGS. 1 and 2, by means of a clutch on the conversion device 24 or, alternatively, by physical separation of the rolling element 15 and counter-element 14.