Machine and method for earth-working

1. A machine comprising a mast, along which a top drive can be moved vertically by means of an adjusting device, through which top drive a telescopic kelly bar is displaceably guided, which has at least one outer kelly bar which is designed to come to lie on the top drive, and one inner kelly bar which comprises a rope suspension for a rope, through which the inner kelly bar can be moved vertically by means of a main rope winch,

wherein

an automatic control device is provided, which is designed to automatically control the adjusting device for the top drive and/or the main rope winch for the kelly bar in such a way that the inner kelly bar can be moved relative to the top drive in some areas in a rapid travel mode at a first speed and in some areas in a conservative travel mode, in which the speed is reduced with respect to the first speed of the rapid travel mode,

the automatic control device provides movement according to the rapid travel mode or the conservative travel mode before or after a drilling operation, and

the movement in the conservative travel mode is realized at a transition, at which the inner kelly bar is moved inside the outer kelly bar,

wherein

the outer kelly bar has a first locking element,

the inner kelly bar has a second locking element, and

in the conservative travel mode, the first locking element is configured to move past the second locking element without locking being provided.

2. The machine according to claim 1 ,

wherein

the kelly bar has one or more intermediate kelly bar elements, which are arranged between the outer kelly bar and the inner kelly bar.

3. The machine according to claim 1 ,

wherein

an earth-working tool, in particular a drilling bucket or an auger, is detachably attached to a lower end of the inner kelly bar.

4. The machine according to claim 1 ,

wherein

at least one input device is provided, with which a type and/or size of the kelly bar, a position of the adjusting device for the top drive, a position of the rope and/or a type and/or size of the top drive can be input.

5. The machine according to claim 4 ,

wherein

the input device has at least one sensor for automatic input.

6. The machine according to claim 4 ,

wherein

depending on the input via the input device, the areas in which the movement is provided according to the rapid travel mode or the conservative travel mode are fixed by the control device upon movement of the kelly bar.

7. The machine according to claim 1 ,

wherein

to reduce the speed in the conservative travel mode, the rope can be moved via the main rope winch and the top drive via the adjusting device at the same time in the same direction.

8. A method for earth-working with a machine having a mast, along which a top drive can be moved vertically by means of an adjusting device, through which top drive a telescopic kelly bar is displaceably guided, which has at least one outer kelly bar, which is designed to come to lie on the top drive, and one inner kelly bar, which comprises a rope suspension for a rope, through which the inner kelly bar is moved vertically by means of a main rope winch, wherein the earth is worked with an earth-working tool, which is attached to a lower end of the inner kelly bar, the method comprising:

automatically controlling the adjusting device for the top drive and/or the main rope winch for the kelly bar by means of a control device, wherein the inner kelly bar is moved relative to the top drive in some areas in a rapid travel mode at a first speed and in some areas in a conservative travel mode, in which the speed is reduced in comparison with the first speed of the rapid travel mode,

providing movement with the control device according to the rapid travel mode or the conservative travel mode before or after a drilling operation, and

realizing the movement in the conservative travel mode at a transition, at which the inner kelly bar is moved inside the outer kelly bar,

wherein

the outer kelly bar has a first locking element,

the inner kelly bar has a second locking element, and

in the conservative travel mode, the first locking element is configured to move past the second locking element without locking being provided.

9. The method according to claim 8 , comprising:

moving the inner kelly bar alone or together with other bar elements of the kelly bar.

10. The method according to claim 8 , comprising:

realizing the movement in the conservative travel mode directly before the kelly bar comes to lie on the top drive, and/or before the earth-working tool comes into contact with the ground.

11. The method according to claim 8 ,

wherein

the control device determines, using input values, when the movement in the rapid travel mode or the movement in the conservative travel mode is realized.

12. The method according to claim 11 ,

wherein

the input values are automatically detected at least in part by the control device by means of an input device.

13. The machine according to claim 1 ,

wherein

the automatic control device provides the movement according to the conservative travel mode before a portion of the top drive makes contact with an upper end of the kelly bar, or

the automatic control device provides the movement according to the conservative travel mode before the earth is reached by an earth-working tool attached to a lower end of the kelly bar.

14. The method according to claim 11 ,

wherein

the control device provides the movement according to the conservative travel mode before a portion of the top drive makes contact with an upper end of the kelly bar, or

the control device provides the movement according to the conservative travel mode before the earth is reached by an earth-working tool attached to a lower end of the kelly bar.