MEASURING ARRANGEMENT AND REMOVAL DEVICE WITH A MEASURING ARRANGEMENT

Abstract

The invention relates to a measuring arrangement for measuring a position, in particular a verticality, of a vertically adjustable and lowerable working apparatus with respect to an upper fixed point, with at least one measuring cable which is on the one hand connected to the vertically adjustable working apparatus and on the other hand extends towards the fixed point, at least one measuring means which is connected to the corresponding measuring cable and designed to measure an angle of inclination of the measuring cable relative to a vertical measurement axis and is arranged in a connection region between the measuring cable and the working apparatus, and at least one connecting means which is arranged between the measuring means and the working apparatus and designed to keep the measuring means torsion proof about the vertical measurement axis and at the same time capable of being angled with respect to the vertical measurement axis on the working apparatus. According to the invention provision is made in that the connecting means has a connecting tube which is arranged coaxially to the vertical measurement axis, and in that the connecting tube is designed so as to be torsion proof about the vertical measurement axis and deflectable with respect to the vertical measurement axis.

Claims

1.-15. (canceled)

16. A measuring arrangement for measuring a position, in particular a verticality, of a vertically adjustable and lowerable working apparatus with respect to an upper fixed point, with at least one measuring cable which is on the one hand connected to the vertically adjustable working apparatus and on the other hand extends towards the fixed point, at least one measuring means which is connected to the corresponding measuring cable and designed to measure an angle of inclination of the measuring cable relative to a vertical measurement axis and is arranged in a connection region between the measuring cable and the working apparatus, and at least one connecting means which is arranged between the measuring means and the working apparatus and is designed to keep the measuring means torque proof about the vertical measurement axis and at the same time capable of being angled with respect to the vertical measurement axis on the working apparatus, wherein the connecting means has a connecting tube which is arranged coaxially to the vertical measurement axis, and the connecting tube is designed so as to be torsion proof about the vertical measurement axis and deflectable with respect to the vertical measurement axis.

17. The measuring arrangement according to claim 16, wherein the connecting tube is formed in a hose-like manner from a flexible material.

18. The measuring arrangement according to claim 16, wherein the connecting tube is at least in sections designed as a corrugated tube with a corrugated wall region.

19. The measuring arrangement according to claim 18, wherein the corrugated tube is manufactured from metal, in particular steel.

20. The measuring arrangement according to claim 16, wherein the connecting tube is filled with an incompressible liquid.

21. The measuring arrangement according to claim 16, wherein at the end of the connecting tube which is directed towards the working apparatus a rotary bearing is provided, with which the connecting tube is rotatable about the vertical measurement axis, in particular about an angle of 180?.

22. The measuring arrangement according to claim 21, wherein a rotary drive is arranged for rotating the rotatably supported connecting tube in at least one different rotational position and the measuring means is designed to measure the angle of inclination in the different rotational positions.

23. The measuring arrangement according to claim 16, wherein at least two measuring cables are provided which are attached to the working apparatus by being horizontally spaced apart from each other.

24. The measuring arrangement according to claim 16, wherein inside the connecting tube a pull element, in particular a pull cable, is arranged.

25. A removal device for producing a hole, in particular a trench, in the ground, with a working apparatus which has at least one removal tool for removing ground, a carrier implement, on which the working apparatus is supported in a vertically adjustable manner for introduction into the ground, and a measuring arrangement for measuring the position, in particular a verticality, of the working apparatus in the ground, wherein a measuring arrangement according to claim 16 is arranged.

26. The removal device according to claim 25, wherein the measuring cable has a density which is equal to or lower than the density of a slurry, with which the hole produced by the working apparatus is filled.

27. The removal device according to claim 25, wherein the working apparatus is provided with actuatable positioning members for change of position of the working apparatus in the hole and on the carrier implement a control and evaluation unit is provided and designed to check a position of the working apparatus and change this by actuating the positioning members depending on the measured values of the at least one measuring means.

28. The removal device according to claim 25, wherein on the carrier implement a winch is provided for each measuring cable, by which the measuring cable can be tracked to the working apparatus whilst being under predeterminable pretension.

29. The removal device according to claim 25, wherein the at least one fixed point is designed and calibrated on a lead frame which is arranged at an upper end of the hole.

30. The removal device according to claim 25, wherein the working apparatus is a diaphragm wall cutter with at least one driven cutting wheel which is rotatably supported about a horizontal axis of rotation on a lower end of a cutter frame.

Description

[0026] The invention is described further hereinafter by way of preferred embodiments illustrated schematically in the drawings, wherein show:

[0027] FIG. 1 a perspective view of a removal device with a measuring arrangement according to the invention;

[0028] FIG. 2 a detailed view of the measuring arrangement of FIG. 1 in a front view; and

[0029] FIG. 3 an enlarged detailed view of a measuring means of a measuring arrangement according to the invention.

[0030] According to FIG. 1 a removal device 10 with a carrier implement 12 is illustrated which has a crawler-track running gear as undercarriage 13. On the undercarriage 13 an upper carriage 14 with an operator's cab 15 having the device control is rotatably supported about a horizontal axis of rotation. In the illustrated embodiment, as mast the removal device 10 has an extension mast 16 capable of being angled, via which a working apparatus 20 is held in a vertically adjustable manner by means of supporting cables 17.

[0031] In the illustrated embodiment the working apparatus 20 is designed as a diaphragm wall cutter 22 with a cutter frame 24. On the cutter frame 24 a plurality of extendable flap-shaped positioning members 25 is arranged, with which a position of the diaphragm wall cutter 22 in a hole in the ground can be changed and set in a known manner. At a lower end of the cutter frame 24 two pairs of cutting wheels 27 are rotatably supported as removal tools 26. In a known manner the cutting wheels 27 can be set into rotation via an internal cutting wheel drive in order to remove ground material.

[0032] To measure a position, in particular a verticality of the working apparatus 20 in the ground, a measuring means 40 of a measuring arrangement 30 according to the invention is attached in the region of a suspension means 28, via which the diaphragm wall cutter 22 is connected to the supporting cables 17. The measuring means 40, which will be described in greater detail hereinafter, is arranged approximately centrally and coaxially to the longitudinal axis of the working apparatus 20. From the measuring means 40 which is firmly connected to the working apparatus 20 a measuring cable 32 extends upwards to a defined fixed point 38 designed on a lead frame 36. The lead frame 36 is fixed at an upper end of the hole on the ground surface, in which case the fixed point 38 is calibrated and predetermines a target reference point for the position of the working apparatus 20.

[0033] The measuring cable 32 extends beyond the lead frame 36 high up as far as the carrier implement 12, in which case the measuring cable 32 is guided via deflection pulleys to a winch 18 on the upper carriage 14. Via the winch 18 the measuring cable 32 can be tracked to the working apparatus 20 which is being lowered into the ground and a certain tension of the measuring cable 32 can be ensured.

[0034] In a generally known manner, further lines and hoses for operation of the diaphragm wall cutter 22 are tracked from the carrier implement 12 via corresponding winches and drums.

[0035] In FIG. 2 an upper end of a modified working apparatus 20 with a total of two measuring means 40 is depicted, with a cutter frame 24 having already been introduced into a ground 5 while a hole 7 or trench is being formed.

[0036] The two measuring means 40 are fixed on the cutter frame 24 by being horizontally and vertically offset. From each measuring means 40 a measuring cable 32 extends upwards through a lead frame 36 which is placed onto the surface of the ground above the hole 7. The measuring cables 32 are each guided through a predetermined fixed point 38 on the lead frame 36 which serves as a reference point for position measurement and in particular the measurement of the verticality of the working apparatus 20 in the ground 5.

[0037] If the working apparatus 20 is located in the target position the measuring cables 32 extend precisely vertically to the vertical measurement axis through the respective fixed point 38. If a positional deviation occurs in the horizontal direction, this results in a deflection of at least one of the measuring cables 32 with respect to the vertical measurement axis. This deviation or angulation can be determined by the measuring means 40, as will be explained in greater detail hereinafter with reference to the illustration according to FIG. 3. Vertical adjustment of the working apparatus 20 takes place via the supporting cables 17 which are connected via a suspension means 28 to the working apparatus 20.

[0038] A preferred embodiment of a measuring arrangement 30 according to the invention with a measuring means 40 is illustrated schematically in FIG. 3. A measuring cable 32 is guided via a fixing sleeve 34 to an approximately ball-shaped measuring means 40 which is able to establish with high measuring accuracy a deviation and in particular an inclination of the measuring cable 32 with respect to a vertical measurement axis. The vertical measurement axis can in particular result from the direction of gravity.

[0039] The measuring means 40 is connected via a connecting means 50 to the working apparatus 20. The connecting means 50 has a connecting tube 52 extending in the vertical direction. The connecting tube 52 comprises a corrugated wall region and can be referred to as corrugated tube. A pull cable can extend inside and along the connecting tube 52. The connecting tube 52 can preferably be filled with liquid. By way of an upper fixing flange 55 the connecting tube 52 is firmly connected to the measuring means 40. By way of a lower fixing flange 56 the connecting tube 52 is attached to a rotary bearing 60, with which the connecting tube can be rotated about the vertical axis. For rotation provision is made below the rotary bearing 60 for a rotary drive 62, with which the connecting tube 52 can be adjusted in defined positioning angles with respect to the working apparatus 20. In this way, a measurement of the angle of inclination can take place in different rotational positions so that this also allows a determination of the position of the working apparatus 20 in space. The rotary drive 62 is connected via a flange connection to the working apparatus 20, in which case the connection is provided either on the frame of the working apparatus 20 or on the suspension means 28.