Control for a retainer of a transfer device for a rod section of a ground drilling device

Abstract

The invention relates to a control for at least one retainer of a transfer device for a rod section of a ground drilling device, wherein the ground drilling device is configured for moving a drill string, and the transfer device is configured for transferring the received rod section from a position in a rod magazine to a position on the drill string or vice versa, and the control is configured to move the retainer between a position above the rod magazine and the position on the drill string while the drill string is still moving.

Claims

1. A control for at least one retainer (10) of a transfer device (9) for a rod section (7) of a ground drilling device (1), wherein the ground drilling device (1) is designed for moving a drill string (6), and the transfer device (9) is configured for transferring the received rod section (7) from a position in a rod magazine (8) to a position on the drill string (6) or vice versa, and the control is configured to move the retainer (10) between a position above the rod magazine (8) and the position on the drill string (6) while the drill string (6) is still moving.

2. The control of claim 1, wherein the retainer (10) is moved to at least one intermediate position, which is a lowered retainer position located on a travel path of the retainer between the position above the rod magazine (8) and the position on the drill string (6).

3. The control of claim 2, wherein said at least one intermediate position is above a fluid collection container (12) for drilling fluid.

4. The control of c1aim 1, wherein the transfer device (9) has a crane-like structure.

5. The control of claim 1, wherein on the travel path between the position above the rod magazine (8) and the position on the drill string (6) there is a storage for a rod section (7) on which a rod section can be placed and picked up again.

6. The control of claim 1, wherein the control is configured for sorting the rod sections (7) in the rod magazine (8).

7. A transfer device (9) for a rod section (7) of a ground drilling device (1), wherein the ground drilling device (1) is designed for moving a drill string (6), and the transfer device (9) has at least one retainer (10) for a rod section (7) and is configured for transferring the received rod section (7) from a position in a rod magazine (8) to a position on the drill string (6) or vice versa, and the transfer device (9) can be controlled by means of a control, in particular according to claim 1, wherein the control is configured to move the retainer (10) between a position above the rod magazine (8) and the position on the drill string (6) while the drill string is still moving.

8. A ground drilling device (1) having a control, in particular according to claim 1, and a transfer device (9), wherein the ground drilling device (1) is configured for moving a drill string (6), and the transfer device (9) has at least one retainer (10) for a rod section (7) and is configured for transferring the received rod section from a position in a rod magazine (8) to a position on the drill string (6) or vice versa, and the control is configured to move the retainer (10) between a position above the rod magazine (8) and the position on the drill string (6) while the drill string is still moving.

9. A method for transferring a rod section (7) of a ground drilling device (1) by means of a transfer device (9) receiving the rod section by means of at least one retainer (10), wherein the ground drilling device (1) is configured for moving a drill string (6), and the rod section (7) is transferred from a position in a rod magazine (8) to a position on the drill string (6) or vice versa, wherein the retainer (10) is moved between a position above the rod magazine (8) and the position on the drill string (6) while the drill string (6) is still moving.

10. A use of a control of a transfer device (9) for a rod section (7) of a ground drilling device (1), wherein the ground drilling device (1) is configured for moving a drill string (6), and the transfer device (9) has at least one retainer for a rod section (7) and is used for transferring the received rod section (7) from a position in a rod magazine (8) to a position on the drill string (6) or vice versa, and the control is used to move the retainer (10) between a position above the rod magazine (8) and the position on the drill string (8) while the drill string (6) is still moving.

Description

[0054] In the drawings:

[0055] FIG. 1 shows a schematic view of a ground drilling device with a drill string in a side view in a partially sectioned representation;

[0056] FIG. 2 shows a more detailed illustration of the ground drilling device in the region of a rod magazine and a drive with a transfer device;

[0057] FIG. 3 shows the more detailed representation of the rod magazine, drive and transfer device in a view from the front;

[0058] FIG. 4 shows a flow diagram of a bore designed as a pilot bore; and

[0059] FIG. 5 shows a flow chart of a ground bore designed as an expansion bore.

[0060] FIG. 1 shows a schematic view of a ground drilling device 1 for the trench-less laying of lines, such as water, sewage, power or data lines, during the so-called pilot drilling. The ground drilling device 1 is equipped with a rotary drive 2 and a feed drive 3 in order to push or pull a drilling head 4 or a drilling tool through the ground 5. The drill head 4, which is designed asymmetrically for executing controlled bore courses, is arranged at the front end of a drill string 6, which has individual rod sections 7.

[0061] The individual rod sections 7 are held in a rod magazine 8 and, during drilling operation, are removed from the rod magazine 8 by means of a transfer device 9 shown in more detail in FIG. 2 and FIG. 3 and moved into the longitudinal axis L of the drill string 6 in order to be mounted in and therefore lengthen the drill string 6. As can be seen in FIG. 3, the transfer device 9 can move a rod section 7 both transversely (X-axis X) and perpendicularly (Y-axis Y) to the longitudinal axis L of the drill string 6 and enter the rod magazine 8 and grab a rod section 7 with the retainers 10 designed as a gripper, then drive out of the rod magazine 8 again with a rod section 7 and transport the rod section 7 into the longitudinal axis L of the drill string 6 by movements in the direction of the X and Y axes. The retainers 10 are moved to a position on the drill string 6 where the rod section 7 can be added to the drill string 6, which is already running for its main part in the ground 5, to extend it, wherein a movement ultimately is carried out in the direction of the longitudinal axis L (also referred to as the Z axis). in order to bring the rod section 7 to the drill string 6 which is already running predominantly in the ground. The transfer device 9 has a pushing unit 11 for carrying out this last direction of movement.

[0062] In order to shorten dead times, a rod section 7 is first transported from the rod magazine 8 into an intermediate position shown in FIGS. 2 and 3 near the longitudinal axis L of the drill string 6. During the movements of the transfer device 9, the pilot bore can be continued without interruption. For the final introduction of a further rod section 7 into the drill string 6, the travel path from the intermediate position in the longitudinal axis L and thus also the dead time in which no drilling progress takes place are now very short, which makes work much more efficient.

[0063] Below the position in which a rod section 7 is brought into an intermediate position by means of the transfer device 9, a drainage trough 12 for residual drilling fluid exiting from the deposited rod sections 7 is attached. If a rod section 7 is removed from the drill string 6 while it is being pulled back, there is still a certain residual amount of drilling fluid in such a rod section 7. Normally, the carriage of the ground drilling device 1 is inclined slightly forward (towards the target), so that the residual amount of drilling fluid from each rod section 7 that is deposited in the intermediate position would run out and contaminate the ground drilling device 1 and the surrounding soil. A fluid collection container 12 designed as a (drainage) tub catches the exiting residual amount of drilling fluid and directs it to an underlying anchor plate 13. From here, the drilling fluid can be removed and returned to the drilling process.

[0064] The processes involved in a pilot bore are described in FIG. 4. After completion of the pilot bore, a line to be laid is usually pulled in or the existing pilot bore is widened in order to be able to lay lines with larger diameters.

[0065] The processes in this case take place more or less in the opposite direction, as explained in FIG. 5. Before the removal of a rod section 7 from the drill string 6 to shorten it, the transfer device 9 again assumes the already described intermediate position in order to be able to reach the longitudinal axis L of the drill string 6 over a short distance and thus in a short time in order to be able to grip a withdrawn rod section 7. The rod section 7 is then deposited parallel to the progress of the drawing-in, i.e. without interrupting the actual operating steps. The intermediate position is selected in such a way that a residual quantity of drilling fluid which runs out of a rod section 7 is caught when this rod section 7 is removed from the drill string 6 and fed back into the drilling process.