EP3663503B1 - Soil drilling device - Google Patents

Description

The invention relates to an earth drilling device according to the preamble of claim 1. Such an earth drilling device has an auger which can be driven about a drilling axis via a rotary drive and which is surrounded by a drill pipe. Furthermore, an ejection device is arranged for discharging cuttings from the auger, as well as a mast, along which the auger with the ejection device can be displaced via a feed slide. In order to discharge the cuttings, a discharge line of variable length is also arranged, which can be placed against the ejection device.

Such an earth auger is in DE 201 01 657 described. This earth drilling device comprises an auger, a drill pipe surrounding it and a rotary drive with which the auger can be driven about a drilling axis. Furthermore, an ejection device for discharging cuttings from the auger is arranged, which has a collecting container and a discharge line for the cuttings. The discharge line has a multiplicity of pipe elements which are funnel-shaped and taper towards one end and which can be retracted into one another in order to shorten the discharge line. The rotary drive with the auger received by it and the ejection device are arranged on a mast, along which they can be displaced.

The previously known earth drilling device has proven itself in practice. It enables the cuttings to be removed and diverted from the auger in a controlled manner.

In order to prevent that, when the drill string with the auger and drill pipe has been drilled deep and the collecting container is only just above the ground, the drainage line, which has been contracted to a minimum length, rests on the ground and thus a regulated ejection of cuttings is no longer possible, in the EP 1 978 204 B1 proposed to provide a lifting device which makes it possible to raise the discharge line in its entirety when the drill rod has been drilled deep. A crane device is used as the lifting device proposed, with which the discharge line can be raised together with a winch device for changing the length of a rope to change the length of the discharge line.

The disadvantage of this proposed solution is that the arrangement of the crane device is very complex. In order to be able to lift the entire discharge line including the winch device, the crane device must be designed to be robust enough. In addition, the collecting container to which the crane device is to be attached must be dimensioned accordingly.

A generic auger is still in the JP S61 26732 U described.

Invention aims to remedy this. The invention is based on the object of providing an earth drilling device in which, without the need for a crane device, the discharge line, which has been contracted to a minimum length, is prevented from resting on the ground. According to the invention, this object is achieved by the features of the characterizing part of patent claim 1.

The invention provides an earth drilling device in which, without the need for a crane device, the discharge line, which has been contracted to a minimum length, is prevented from resting on the ground. The fact that the discharge line is connected at its end facing the discharge device to a funnel connected to a first swivel unit and at the other end to a guide frame which can be swiveled via a second swivel unit, the first swivel unit being displaceable and the second swivel unit fixed on the mast , it can simply be swiveled when approaching the ground, which avoids touching down on the ground.

In a further development of the invention, the first swivel unit is arranged on a slide which is slidably guided along a rail connected to the feed slide or to the ejection device. This enables a further advance of the auger when the discharge line is swiveled away and contracted to a minimum length, with the with the in the end position located funnel connected first pivot unit when passing the feed slide along the rail slides.

In an embodiment of the invention, at least one swivel unit is operated hydraulically. This enables the discharge line to be pivoted remotely. Both swivel units are advantageously operated hydraulically. The swivel units are preferably controllable in such a way that synchronous swiveling is effected, the swivel units preferably being hydraulically coupled.

In a further embodiment of the invention, the ejection device can be closed by means of a hydraulically or electrically operated flap. In this way, the passage of the cuttings from the ejection device to the discharge line can be blocked in a targeted manner.

In a further development of the invention, the ejection device comprises a collecting container which has a radially projecting outlet connection, the container preferably being axially limited by at least one exchangeable flange. This enables the collecting container to be adapted as required to the diameter of the drill pipe required in each case.

In an embodiment of the invention, the guide frame is cylindrical and on the outside surrounds an end-side section of the discharge line, the discharge line being fastened to the guide frame at its end facing the funnel. This results in a circumferential guidance of the discharge line.

In an embodiment of the invention, the funnel has on its side facing the guide frame an at least partially circumferential, radially outwardly extending collar, which is preferably provided with an axially extending at least partially circumferential edge in the direction of the guide frame, which the guide frame on contact the Collar includes the end. This fixes the funnel with the discharge line contracted to a minimum length.

In a further development of the invention, the guide frame is designed as a tubular container. This provides effective protection for the discharge line, which has been contracted to a minimal length. In addition, this creates a compact unit that is protected from external influences and can be easily stored in the assembled state. The guide frame is preferably dimensioned to accommodate the entire discharge line set to a minimum length.

In a further development of the invention, the discharge line is designed as a foldable hose, the discharge line preferably being composed of several line sections each having connecting flanges by means of which they are connected to one another, in particular screwed. This enables a partial replacement of a hose section, for example due to damage. The foldable design of the hose makes it easy to compress. The hose is preferably made in the form of a bellows.

In an embodiment of the invention, the line section facing the funnel is connected to the funnel via a connecting flange, the line section facing the guide frame preferably being connected to the latter via a connecting flange. This enables simple assembly or disassembly of the discharge line on the guide frame.

In a further embodiment of the invention, at least two connecting flanges, preferably the two outer connecting flanges of the discharge line, are connected to one another via at least one cable, which is connected to a vertically movable cable weight arranged on the outside of the guide frame. This prevents the discharge line from deflecting to the side in the course of a length reduction due to a downward movement of the auger. In this case, a cable pull is preferably in each case at two diametrically opposite locations of two connecting flanges connected to these, wherein the respective cable pull is connected at one end to a vertically movably arranged cable weight, the cables preferably being guided through bushings arranged on the outside of the connecting flanges. The other end of the cables is preferably connected to the upper flange below the funnel.

In a further embodiment of the invention, an at least regionally circumferential profile piece is arranged on the guide frame on its end face facing the first connection flange, in which at least one first deflection roller is arranged in a chamber, which has a channel running from the inside to the outside of the guide frame for the implementation of a cable pull having. As a result, good guidance of the cable pull with simultaneously protected positioning of the pulley is achieved.

In a further embodiment of the invention, at least one cable pull is reeved several times and guided over at least one roller block and subsequently connected to a cable weight. As a result, released rope can be picked up in the course of reducing the length of the discharge line while maintaining the rope tension. If the discharge line is reduced by a certain distance, the path of the rope weight due to the multiple reeving of the rope pull is only a fraction of the path.

Figur 1

die schematische Darstellung eines an einem Mäkler geführten Erdbohrgerätes vor Bohrbeginn a) in einer räumlichen Darstellung; b) in Detaildarstellung des Ausschnitts B; c) in der Draufsicht;

Figur 2

die schematische Darstellung des Erdbohrgeräts aus Figur 1 mit ausgeschwenkter Abführleitung (nach Bohrfortschritt) a) in einer räumlichen Darstellung; b) in Detaildarstellung des Ausschnitts B; c) in einer weiteren räumlichen Darstellung; d) in Detaildarstellung des Ausschnitts D; e) in der Draufsicht;

Figur 3

die schematische Darstellung des Erdbohrgeräts aus Figur 1 mit ausgeschwenkter Abführleitung und maximal abgesenktem Vorschubschlitten (Ende des Bohrvorgangs) a) in einer räumlichen Darstellung b) in Detaildarstellung des Ausschnitts B; c) in einer weiteren räumlichen Darstellung; d) in Detaildarstellung des Ausschnitts D;

Figur 4

die schematische Darstellung eines Erdbohrgeräts in einer weiteren Ausführungsform vor Bohrbeginn a) in einer räumlichen Darstellung; b) in der Ansicht von vorne;

Figur 5

die Darstellung des Erdbohrgeräts aus Figur 4 nach Bohrfortschritt mit eingefahrener und ausgeschwenkter Abfuhrleitung a) in räumlicher Darstellung; b) in der Ansicht von vorne;

Figur 6

die schematische Darstellung der Abführleitung des Erdbohrgeräts aus Figur 4 mit Führungscontainer im Längsschnitt a) in räumlicher Darstellung; b) in der Ansicht von vorne.

Other further developments and refinements of the invention are specified in the remaining claims. An embodiment of the invention is shown in the drawings and will be described in detail below. Show it:

Figure 1

the schematic representation of an earth drilling device guided on a leader before drilling begins a) in a spatial representation; b) a detailed representation of section B; c) in plan view;

Figure 2

the schematic representation of the earth auger Figure 1 with the discharge line swiveled out (after drilling progress) a) in a three-dimensional representation; b) a detailed representation of section B; c) in a further spatial representation; d) in a detailed representation of section D; e) in plan view;

Figure 3

the schematic representation of the earth auger Figure 1 with the discharge line swung out and the feed slide lowered to the maximum (end of the drilling process) a) in a three-dimensional representation b) in a detailed representation of section B; c) in a further spatial representation; d) in a detailed representation of section D;

Figure 4

the schematic representation of an earth drilling device in a further embodiment before the start of drilling a) in a spatial representation; b) in the front view;

Figure 5

the illustration of the earth auger Figure 4 after drilling progress with retracted and swiveled discharge line a) in three-dimensional representation; b) in the front view;

Figure 6

the schematic representation of the discharge line of the earth auger Figure 4 with guide container in longitudinal section a) in three-dimensional representation; b) in the front view.

The earth drilling device selected as an exemplary embodiment comprises a leader 1 on which a rotary drive 2 is arranged such that it can be moved via a feed slide 11. Such a leader 1 is usually arranged on a chassis designed as a crawler chassis. The rotary drive 2 has a first drive unit 21 for rotatingly driving an auger and a second drive unit 22 for rotatingly driving an auger surrounding the auger Drill pipe 4 on. The rotation of the drill pipe 4 and the auger arranged in it takes place in each case around the drilling axis as a common axis of rotation. The feed slide 11 is connected via a cable arrangement 12 to a feed drive, not shown, designed as a winch drive, via which the feed slide 11 and the rotary drive 2 arranged on it can be moved along the leader 1.

A separate slide 30, which is connected to the feed slide 11, is mounted under the rotary drive 2. A collecting container 31 of an ejection device 3 is suspended in the carriage 30. The collecting container 31 is closed at the top and bottom by two flanges 33, through which a screw auger and a drill pipe 4 coaxially surrounding it are guided. The flanges 33 are interchangeable and can therefore be adapted to the respective drill pipe diameter. At the side of the collecting container has a radially projecting ejection nozzle 32, which can be closed by a hydraulically actuated flap (not shown). In order to extract the earth conveyed by the auger, the drill pipe 4 is provided with at least one window within the collecting container 31. Inside the collecting container 31, paddles (not shown) are welded to the drill pipe 4, by means of which the cuttings located in the collecting container 31 are pushed through the ejection nozzle 32 with each rotation of the drill pipe 4.

On its side facing the ejection nozzle 32, a vertical rail 34 is arranged on the carriage 30 connected to the feed carriage 11, on which a hydraulic first pivot unit 74 is guided so that it can be freely displaced. The first swivel unit 74 is connected to a funnel 6, to which a discharge line 5, designed in the form of a several meters long, collapsible hose, connects. The end of the discharge line 5 opposite the funnel 6 is fastened to the clamping ring 71 of a guide frame 7. The guide frame 7 is mounted on a second swivel unit 75 which is rigidly attached to the leader 1. The two pivot units 74, 75 are hydraulically coupled in such a way that they can be pivoted synchronously.

The guide frame 7 is essentially formed from a clamping ring 71, which is attached to the end of the discharge line 5, as well as a guide ring 72, which has an inner diameter that is larger than the outer diameter of the discharge line 5 and which is circumferentially connected to the clamping ring 71 via struts 73. An annular collar 61 is formed around the funnel 6 and merges into a circumferential edge 62 running parallel to the outer surface of the discharge line 5. The collar 61 is dimensioned such that it rests on the guide ring 72 of the guide frame 7 when the discharge line 5 is set to the minimum length, the edge 62 enclosing the guide ring 72.

In Figure 1 the earth auger guided on the leader 1 is shown before drilling begins. Here, the drill pipe connected to the rotary drive 2 and the auger running in it lie on the ground. The discharge line 5 is positioned with the funnel 6 on the ejection nozzle 32 of the collecting container 31 of the ejection device 3. The guide frame 7 is positioned via the first pivot unit 74 in such a way that the discharge line 5 runs parallel to the drill pipe 4.

During the subsequent drilling process, the drill pipe 4 is set in rotation via the second drive unit 22 and the auger guided in it via the first drive unit 21 of the rotary drive 2 and provided with a load via the rotary drive 2, which is transferred via the cable arrangement connected to the feed slide 11 the feed drive - not shown - is applied to the rotary drive 2. During the penetration of the auger and the drill pipe 4 surrounding it into the ground, the earth material is conveyed upwards via the auger and passes through the at least one window made in the drill pipe 4 into the collecting container 31 Soil material is moved in the direction of the ejection nozzle 32, from where it is ejected by the action of gravity through the discharge line 5 at a distance from the broker 1. During the downward movement of the drilling table, the discharge line 5, which is designed in the form of a bellows in the exemplary embodiment, is via the The ejection nozzle 32 resting on the collar 61 is compressed against the stationary clamping ring 71 of the guide frame 7, as a result of which the length of the discharge line 5 is continuously reduced.

In order to prevent the discharge line 5 with the guide frame 7 from standing up on the ground when the rotary drive 2 is lowered, the discharge line 5, after reaching its minimum length, is moved via the swivel units 74, 75 connected to the funnel 6 and the clamping ring 71 of the guide frame 7 pivoted away from the discharge spout 32 (cf. Figure 2 ). In the swiveled-away position of the discharge line 5, the conveyed soil can then be discharged directly from the discharge nozzle 32 onto the ground. As soon as the circumferential collar 61 of the funnel 6 comes to rest on the guide ring 72 of the guide frame 7 and the rotary drive 2 is moved further downwards, the first swivel unit 74 with the funnel 6 attached to it and connected to the discharge line is forced along its slide 741 the guide rail 34 pushed upwards (cf. Figure 3 ). This enables the rotary drive 2 to travel even further.

In the embodiment according to Figures 4-6 the guide frame is designed as a hose container 8. The hose container 8 is designed essentially as a hollow cylinder and, at its end facing the floor, has an annular profile piece 81, in the chambers 811 of which two deflecting rollers 82 are arranged diametrically opposite one another. The chambers 811 are connected to channels 812 running from the inside to the outside of the hose container for the implementation of a cable 83. On the outside of the hose container 8 guides 84 for rope weights 85 are arranged, in which the rope weights 85 are movably guided along the outer jacket surface of the hose container 8.

In this exemplary embodiment, the discharge line 5 is composed of four line sections 51, each of which in turn is designed in the manner of a bellows and which are provided with connecting flanges 52 at the end, via which the individual line sections 51 are screwed together are connected to each other. The line sections each comprise a flexible hose part with spring steel wire incorporated in a spiral shape. The lowermost line section 51 facing the profile piece 81 is fastened to the latter with its connecting flange 52 facing the profile piece 81. The upper line section 51 lying opposite this line section 51 is screwed to a cover flange 54 via its connecting flange 52. The cover flange 54 has a circumferential, radially projecting collar 55, with which it rests on the hose container 8 when the discharge line 5 is in the folded-up state.

The cover flange 54 is connected with ropes 83, which are guided through feed-throughs 53 provided in the connecting flanges 52 of the discharge line 5 in the direction of the profile piece 81, and then via the pulleys 82 arranged in the chambers 811 of the profile piece 81 through the channels 812 to the outside the outer surface of the hose container 8, where they are again guided at the opposite end of the hose container 8 via deflection rollers 82 arranged there, before they are each connected to a cable weight 85 guided in the guides 84. Before being connected to the respective cable weight 85, the cables 83 are each reeved several times over a roller block 86.

The funnel 6 is placed on the cover flange 54 of the discharge line 5 and is connected to it via turnbuckles 56.

As in Figure 4 shown is the rotary drive 2 at the beginning of the drilling process at the upper end of the leader 1, the discharge line 5 composed of the line sections 51 is fully extended. In the exemplary embodiment, a drill pipe guide 13 through which the drill pipe 4 is guided is arranged on the end facing the ground on the leader. In order to prevent the discharge line 5 from deviating to the side, four wire ropes 83 are tensioned parallel to the longitudinal axis of the discharge line 5, offset from one another by 90 °. These cables 83 have a small radial distance from the outer shell of the discharge line 5 and are not connected to it. you are guided only through recesses in the connecting flanges 52 of the line sections 51. The ropes 83 are kept continuously under tension via the rope weights 85. Due to the downward movement of the rotary drive 2, the discharge line 5 is folded up and "excess" rope 83 is released. In order to absorb this and still be able to maintain the tension at all times, the ropes 83 are reeved several times by means of roller blocks 86. If the rotary drive 2 now moves a certain distance, the path of the cable weight 85 is only a fraction thereof.

In the folded-up state, the discharge line 5 is located completely within the hose container 8, the cover flange 54 resting on a contact flange 87 of the hose container 8.

Claims (15)

1. Soil drilling device with an auger, which can be driven via a rotary drive (2) about a drilling axis and which is surrounded by a drill pipe (4), an ejecting means (3) for the discharge of cuttings from the auger, a mast (1), along which the auger with the ejection means (3) is displaceable via a feed slide (11), as well as a discharge pipe (5), which is variable in length, which can be positioned against the ejection means (3), wherein the discharge pipe (5) is connected to a funnel (6) at its end facing the ejection means (3), characterised in that the funnel (6) is connected to a first pivot unit (74) and that the discharge pipe (5) is connected at the other end to a guide frame (7, 8), which is pivotable via a second pivot unit (75), wherein the first pivot unit (74) is displaceably arranged and the second pivot unit (75) is fixedly arranged at the mast (1).
2. Soil drilling device according to claim 1, characterised in that the first pivot unit (74) is arranged on a slide (741), which is displaceably guided along a rail (34) connected to the feed slide (11) or the ejection means (3).
3. Soil drilling device according to one of the previous claims, characterised in that at least one pivot unit (74, 75) is hydraulically driven and/or that the ejection means (3) can be closed via a hydraulically or electrically operable flap and/or that the ejection means (3) comprises a collecting vessel (31), which has a radially projecting ejection nozzle (32), wherein the collecting vessel (31) is delimited by at least one exchangeable flange (33).
4. Soil drilling device according to one of the previous claims, characterised in that the guide frame (7, 8) is cylinder-shaped and externally surrounds an end-side section of the discharge pipe (5), wherein the discharge pipe (5) with the guide frame (7, 8) is attached at the end thereof directed towards the funnel (6).
5. Soil drilling device according to claim 4, characterised in that the funnel (6) has a partially circumferential, radially outwardly extending collar (61) on its side facing the guide frame (7, 8).
6. Soil drilling device according to claim 5, characterised in that the collar (61) is provided with an at least partially circumferential edge (62) axially extending in the direction of the guide frame, which edge encompasses the guide frame (7, 8) at the end when it abuts against the collar (61).
7. Soil drilling device according to one of claims 4 to 6, characterised in that the guide frame (8) is designed as a tubular container.
8. Soil drilling device according to one of the previous claims, characterised in that the discharge pipe (5) is designed as a foldable hose.
9. Soil drilling device according to claim 8, characterised in that the discharge pipe (5) is composed of several pipe sections (51), which each have connecting flanges (52), via which they are connected, in particular screwed, to one another.
10. Soil drilling device according to claim 8 or 9, characterised in that the pipe section (51) facing the funnel (6) is connected to said funnel (6) via a connecting flange (52).
11. Soil drilling device according to claim 10, characterised in that the pipe section (51) facing the guide frame (7, 8) is connected to said pipe section (51) via a connecting flange (52).
12. Soil drilling device according to one of claims 8 to 11, characterised in that at least two connecting flanges (52) of the discharge pipe (5) are connected to one another via at least one cable (83), which is connected to a vertically movably arranged cable weight (85) arranged on the outside of the guide frame (8).
13. Soil drilling device according to claim 12, characterised in that in each case a cable (83) is connected in two diametrically opposed places by two connecting flanges (52) to these, wherein the respective cable is connected on one end to a vertically movably arranged cable weight (85).
14. Soil drilling device according to claim 12 or 13, characterised in that at the guide frame (7, 8) on its end face facing away from the funnel (6), an at least partially circumferential profile piece (81) is arranged, in which at least one guide roller (82) is arranged in a chamber (811), which has a channel (812) running from the inner side to the outer side of the guide frame for passing through of a cable (83).
15. Soil drilling device according to one of claims 12 to 14, characterised in that at least one cable (83) is reeved several times and guided via at least one roller block (86).

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