EP3415708B1 - Drilling device - Google Patents

Description

The invention relates to a drilling device, in particular for directional horizontal drilling. Such a drilling device is also referred to as a horizontal drilling device. The drilling device has a chassis and a drilling ramp. The drilling ramp is arranged pivotably relative to the chassis to adjust an angle of inclination between the drilling ramp and the soil or an angle of inclination between the drilling ramp and the chassis. With the help of known horizontal drilling devices, a drill head arranged at the tip of a rod is inserted into the soil and guided through the soil at a desired depth and with a desired course. Such a horizontal earth drilling process is also referred to as horizontal directional drilling (HDD) process.

From the documents DE 101 15 233 A1 as well as DE 10 2013 111 350 A1 Horizontal drilling devices are known in which a rod composed of several rod sections is inserted into the ground at a starting point with the help of the horizontal drilling device. Here, the horizontal drilling device can introduce flushing fluid into the hollow rod at high pressure, which then emerges from the drill head at high pressure. A borehole is drilled into the ground due to the high pressure of the flushing fluid and the hard metal teeth of the drill head.

When starting the pilot drilling, different entry angles of the drill head into the ground are required depending on the conditions on site, such as the nature of the soil and the desired design of the entry point and the horizontal drilling. The desired penetration angles are in the range between 10° and 30°. In known horizontal drilling devices, the drilling ramp and chassis are connected via a single joint. As a result, at a flat entry angle of, for example, 10°, a base plate arranged on the front part of the drilling ramp and the chassis of the drilling device contact the earth's surface. As soon as the incline of the drilling ramp is made steeper, the chassis on the base plate side is raised end from the earth's surface. As a result, the chassis is either tilted or it is simultaneously raised from the ground by an opposite support ramp behind the chassis on the side facing away from the base plate, so that the chassis itself is arranged parallel to the surface of the earth. As a result, the drilling device loses friction with the earth's surface, so that the drilling device is no longer as stable on the earth's surface as when the chassis comes into direct contact with the surface.

A known possibility of enabling ground contact of the chassis at different angles of inclination of the drilling ramp is to connect the drilling ramp to the chassis via a single joint, but at the same time to arrange it so that it can be moved longitudinally. However, this has the disadvantage that on particularly flat slopes the drilling ramp protrudes very far beyond the chassis, so that a very large footprint is required for this drilling device. This space is often not available, especially when space is limited in inner cities.

document US 3,205,672 A1 discloses a drilling device in which a drilling ramp can be arranged in a first position for diagonal drilling and in a second position for vertical drilling. In both drilling positions the drilling ramp does not contact the soil. In addition, the end of the drilling ramp facing the borehole is arranged at a first distance from the ground in the position for oblique drilling and at a second distance from the ground in the drilling position for vertical drilling.

document GB 1 496 568 A discloses a drilling device in which a drilling ramp can be arranged at different angles of inclination to the ground. However, this device has neither a chassis nor a contact area for supporting the drilling ramp on the ground.

document US 2010/294570 A1 discloses a horizontal anchor drilling machine for drilling in rock. With this drilling machine, a base plate is placed on the ground by a chassis using hydraulic cylinders. A device with a drilling ramp is mounted on this base plate, the drilling ramp being operated using two hydraulic cylinders can be placed in any position.

document US 6,527,063 B2 discloses a horizontal drilling system with a crawler chassis, in which a rotation axis between the drilling ramp and a hydraulic cylinder can be arranged at different positions for setting different inclinations of the drilling ramp.

document US 2011 0174545 A1 discloses a device for horizontal and vertical drilling, which has a contact area for contacting the soil at one end of the drilling ramp. To set different inclinations, the chassis must be raised using additional lever arrangements or the drilling ramp must be moved along its longitudinal axis.

Proceeding from this, the object of the invention is to provide a drilling device in which the inclination of the drilling ramp can be adjusted in such a way that contact of the chassis is possible even with different inclinations of the drilling ramp. It is therefore desired that the drilling ramp and/or a base plate forming the front part of the drilling ramp and the chassis contact the earth's surface with as many inclinations of the drilling ramp as possible.

This task is solved by a drilling device with the features of claim 1. Advantageous further developments are specified in the dependent claims.

In particular, in that a pivotable arm, in particular a lever arm, is provided, the first end of which is rotatably connected to the chassis about a first axis of rotation and the second end of which is rotatably connected to the drilling ramp about a second axis of rotation, this can be achieved in particular with an inclination adjustment of the drilling ramp Drilling ramp can be moved on a circular path around the first axis of rotation, so that both the distance to the chassis and the position in the longitudinal direction of the Chassis can be changed so that the drilling ramp does not have to be positioned below the chassis, both at flat entry angles and at steep entry angles. This means that the chassis does not have to be raised, even at steep entry angles. In order to further increase the entry angle range, it can, however, be provided that a region of the drilling ramp, in particular a bottom ramp of the drilling ramp, is arranged below the installation level of the chassis. This allows the entry angle range to be further increased while requiring little space. In the drilling device, the drilling ramp is preferably arranged pivotably relative to the chassis for adjusting an angle of inclination between the drilling ramp and the soil or an angle of inclination between the drilling ramp and the chassis. In particular, the angle of inclination or entry angle is adjusted by pivoting the pivotable arm with the aid of the first hydraulic cylinder and additionally by pivoting the drilling ramp about the second axis of rotation with the aid of the second hydraulic cylinder.

It is particularly advantageous if the device has a control unit for controlling the first hydraulic cylinder and for controlling the second hydraulic cylinder. This makes it easy to set a desired inclination of the drilling ramp to the chassis or of the drilling ramp to the ground. In particular, the control unit can be used to simultaneously control the first hydraulic cylinder and the second hydraulic cylinder, so that a simple representation of the angle of inclination is possible.

It is particularly advantageous if the chassis, the lever, the drilling ramp and the second hydraulic cylinder form a coupling gear, the second hydraulic cylinder being a variable-length link. Preferably, the other links of the coupling gear, i.e. the chassis, the lever and the drilling ramp, are elements with fixed length distances between the points at which they are contacted by the other links of the coupling gear. It is particularly advantageous if all six axes of rotation run parallel. This makes it possible to set up the device very simply.

It is particularly advantageous if the fourth axis of rotation runs in a horizontal plane which is arranged between the horizontal planes in which the first and second axes of rotation run. Alternatively, the fourth axis of rotation and the second axis of rotation lie on the same straight line, i.e. the second and fourth axes of rotation coincide. This enables a simple structure of the device.

Furthermore, it is advantageous if the first and third axes of rotation are arranged at a horizontal distance from one another, i.e. at least at a distance in the direction of the longitudinal axis of the chassis. Alternatively or additionally, the sixth axis of rotation can be arranged at least at a distance in the direction of the longitudinal axis of the rod or the longitudinal axis of the drilling ramp to the second axis of rotation. In other words, the second and sixth axes of rotation are at a horizontal distance from one another. In other embodiments, the first axis of rotation and the second axis of rotation lie on the same straight line, i.e. they are the same axis of rotation. These constructive measures also achieve a simple structure. In addition, this structure allows the angle of inclination of the drilling ramp to be easily adjusted.

Furthermore, it is advantageous if the drilling ramp serves to hold and guide a drill pipe and a third drive unit, preferably a hydraulic motor, is provided for rotating and axially advancing the drill pipe. Alternatively, the third drive unit can only be provided for rotating the drill pipe and a fourth drive unit can be provided for advancing the drill pipe. This allows the drill pipe to be driven easily.

Furthermore, it is advantageous if a rod magazine for accommodating several rod sections, a fifth drive unit for driving the chassis, a control station for operating the drilling device and/or a mixing device for preparing a flushing liquid are provided. This results in a simple and compact construction of the drilling device.

Furthermore, it is advantageous if there is a contact area at one end of the drilling ramp for resting on the ground. It is advantageous here if at least the contact area of the drilling ramp projects laterally beyond the chassis. This allows the drilling ramp to be easily supported and supported.

It is advantageous here if the contact area is formed by a base plate that is connected to the drilling ramp and can be pivoted about at least a seventh axis of rotation. A control unit can then control the second hydraulic cylinder in such a way that, during an adjustment movement of the first hydraulic cylinder, it carries out an adjustment movement in such a way that the seventh axis of rotation is arranged in the same horizontal plane after the adjustment movement of the first and second hydraulic cylinders as before the adjustment movement. According to claim 1, the control unit controls the first hydraulic cylinder to increase the entry angle of the drill pipe into the ground in such a way that the second axis of rotation moves upwards by a vertical distance on a circular path around the first axis of rotation and thus also moves away from the entry point of the pipe in the horizontal direction becomes. In addition, the control unit controls the second hydraulic cylinder in such a way that the drilling ramp is rotated about the second axis of rotation, so that the contact area is arranged in the same horizontal plane at least before and after the change in the entry angle. This enables easy handling of the drilling device. In particular, the drilling ramp is effectively supported by the contact area or the pivotable base plate. Furthermore, two rollers can also be connected to the drilling ramp, which are rotatably arranged around the seventh axis of rotation, so that the end of the drilling ramp, on which the rollers are arranged, can be moved on the ground with the help of the rollers.

Furthermore, it is advantageous if the control unit controls the first hydraulic cylinder to reduce the entry angle in such a way that the second axis of rotation is moved downwards by a vertical distance on a circular path around the first axis of rotation and in particular towards the entry point of the linkage in the horizontal direction. Furthermore, the control unit controls the second hydraulic cylinder in such a way that the drilling ramp is rotated about the second axis of rotation, so that the contact area is arranged in the same horizontal plane at least before and after the change in the entry angle. This ensures that even when the entry angle is reduced, secure support can be provided via the base plate or the contact area, with very simple handling and operation being achieved by the described control of the hydraulic cylinders.

Furthermore, it is advantageous if the control unit controls the second hydraulic cylinder in such a way that it carries out an adjustment movement during an adjustment movement of the first hydraulic cylinder in such a way that the seventh axis of rotation remains in the same horizontal plane during the adjustment movements of the first and second hydraulic cylinders.

Furthermore, it is advantageous if the drilling ramp includes at least one anchoring device for anchoring the drilling ramp in the ground. In particular, the anchoring device can be connected to the base plate of the drilling ramp. This allows the drilling device to be anchored easily and securely in the ground.

Furthermore, it is advantageous if the angle of inclination of the drilling ramp and/or the drill pipe can be adjusted by an angular range between 10° and 30°, in particular by an angular range of 20°, with the aid of the first and second hydraulic cylinders. This angle of inclination is also referred to as the entry angle of the drill pipe into the ground or as the working angle. Through such an adjustment range of, for example, 10°, 20° or 30°, an inclination position of the drilling ramp suitable for the respective nature of the soil and thus a suitable entry angle of the drill pipe can be set. It is particularly advantageous if the drilling ramp can be tilted relative to the chassis in such a way that an entry angle of the drill pipe can be set in the range between 10° and 30°, in particular between 10° and 25°. This allows a suitable entry angle to be selected and set.

Furthermore, it is advantageous if the drilling ramp has a first connection area for connecting the arm to the drilling ramp and if the drilling ramp has a second connection area for alternatively connecting the arm to the drilling ramp, the connection areas having at least a distance in the direction of the longitudinal axis of the drilling ramp. The second end of the arm can be connected either to the first connection area or to the second connection area, so that the position of the second axis of rotation on the drilling ramp can be changed. This makes it possible to easily change the adjustable angular range.

Furthermore, it is advantageous if at least one sensor for detecting a pivoting position the drilling ramp is provided relative to the chassis and/or the travel position of the first and/or second hydraulic cylinder. The position of the piston relative to the cylinder housing is viewed as the travel position. Furthermore, it is advantageous if all pull cylinders are designed as double-acting hydraulic cylinders. This enables a simple and robust structure as well as simple control of the drilling device.

Further features and advantages of the invention result from the following description, which explains the invention in more detail using exemplary embodiments in connection with the attached figures.

Fig.1

eine teilweise vereinfachte Seitenansicht einer Bohrvorrichtung gemäß einer ersten Ausführungsform;

Fig.2

eine weitere Seitenansicht der Bohrvorrichtung nach Fig.1, wobei eine Bohrrampe der Bohrvorrichtung in einer zweiten Schwenkposition dargestellt ist;

Fig.3

eine weitere Seitenansicht der Bohrvorrichtung nach den Fig.1 und 2, wobei eine Bohrrampe der Bohrvorrichtung in einer dritten Schwenkposition dargestellt ist;

Fig.4

ein Fahrgestell der Bohrvorrichtung nach den Fig.1 bis 3 mit einem Verbindungsarm zum Verbinden des Fahrgestells mit der Bohrrampe der Bohrvorrichtung;

Fig. 5

eine weitere Seitenansicht der Bohrvorrichtung nach den Fig.1 bis 4, wobei im Unterschied zu den Fig. 1 bis 3 die gegenüberliegende Seite dargestellt ist;

Fig.6

eine vereinfachte schematische Darstellung einer Seitenansicht einer Bohrvorrichtung gemäß einer zweiten Ausführungsform;

Fig.7

eine Seitenansicht der Bohrvorrichtung nach Fig.6, wobei eine Bohrrampe der Bohrvorrichtung in einer zweiten Schwenkposition dargestellt ist; und

Fig.8

eine Seitenansicht der Bohrvorrichtung nach den Fig.7 und 8, wobei die Bohrrampe der Bohrvorrichtung in einer dritten Schwenkposition dargestellt ist.

Show it:

Fig.1

a partially simplified side view of a drilling device according to a first embodiment;

Fig.2

another side view of the drilling device Fig.1 , wherein a drilling ramp of the drilling device is shown in a second pivot position;

Fig.3

another side view of the drilling device according to the Fig.1 and 2 , wherein a drilling ramp of the drilling device is shown in a third pivot position;

Fig.4

a chassis of the drilling device according to the Fig.1 to 3 with a connecting arm for connecting the chassis to the drilling ramp of the drilling device;

Fig. 5

another side view of the drilling device according to the Fig.1 to 4 , whereby in contrast to the Fig. 1 to 3 the opposite side is shown;

Fig.6

a simplified schematic representation of a side view of a drilling device according to a second embodiment;

Fig.7

a side view of the drilling device Fig.6 , wherein a drilling ramp of the drilling device is shown in a second pivot position; and

Fig.8

a side view of the drilling device according to the Fig.7 and 8th , wherein the drilling ramp of the drilling device is shown in a third pivoting position.

Fig.1 shows a partially simplified side view of a drilling device 10, which operates according to a horizontal drilling method, also referred to as a horizontal directional drilling (HDD) method, according to a first embodiment. This drilling device 10 serves both to introduce a pilot hole into the soil 90 and to expand a hole or opening that already exists in the soil 90. Such a drilling device is, for example, from the document DE 101 15 233 A1 known.

In the HDD method, a rod composed of several rod sections 16a is drilled into the ground in the direction of arrow P0 using the drilling device 10 at a starting point or entry point P1 with a drill head (not shown) arranged at the end of the rod remote from the drilling device 10 90 introduced.

After a pilot hole has been produced, it can then be expanded using an expanding head and, preferably at the same time, a pipe can be drawn into the expanded opening. For this purpose, the expansion head is connected to the end of the rod remote from the drilling device 10 and the rod is moved back to the original entry point P1 with the help of the drilling device 10. When pulled back, the pilot hole is then expanded by the expanding head.

The drilling device 10 includes a chassis 12 and a drilling ramp 14. Above the drilling ramp 14, a rod changer 16 is arranged and connected to the drilling ramp 14. The rod changer 16 contains a plurality of rod sections 16a, which are individually transported to an area below the rod changer 16 to extend the rod and there with the end of the rod on the drilling device side and with a rod holder 20 of a drive unit 18 of the drilling device 10 can be connected. To shorten the rod, individual rod sections 16a can be separated from the rod and then transported to the rod magazine of the rod changer 16.

The drive unit 18 serves to generate a rotary movement of the rod and thus a rotary movement of the drill head connected to the rod. The drive unit 18 is preferably a hydraulic motor which is arranged on a drive carriage 19 together with the linkage holder 20. The drive carriage 19 can be moved in the direction of arrow P0 with the aid of a further drive unit 22, which in the present exemplary embodiment includes several hydraulic cylinders. When the drive carriage 19 moves, a displacement movement of a rod connected to the rod holder 20 and of the drilling or expanding head is then caused. The drilling ramp 14 and the chassis 12 are connected via a lever 24, the first end of which is connected to the chassis so that it can pivot about a first axis of rotation 26 and the second end of which is connected to the drilling ramp 14 so that it can pivot about a second axis of rotation. With the help of a first hydraulic cylinder 30, the lever 24 can be pivoted about the first axis of rotation 26. A first end of the hydraulic cylinder 30 is pivotable to the chassis about a third axis of rotation 32 and a second end of the hydraulic cylinder 30 is connected to the lever 24 about a fourth axis of rotation 34. In Fig.1 , the hydraulic cylinder 30 is shown in a retracted position in which the lever 24 is arranged at its lower position. When the cylinder 30 is extended, the lever 24 is pivoted about the first axis of rotation 26, so that the axis of rotation 28 is moved on a circular path around the axis of rotation 26.

The chassis 12 is further connected to the drilling ramp 14 via a second hydraulic cylinder 36, the hydraulic cylinder 36 being connected to the chassis 12 so as to be pivotable about a fifth axis of rotation 38 and to the drilling ramp 14 so as to be pivotable about a sixth axis of rotation 40. The second hydraulic cylinder 26 is also in Fig.1 shown in a retracted position. When the second cylinder 36 is extended, the drilling ramp is pivoted around the second axis of rotation 28. Due to the retracted positions of the hydraulic cylinders 30, 36, the drilling ramp 14 has a first pivoting position an inclination relative to the installation level of the chassis 12 or relative to the ground 90 of α1 = 10 °.

The inclination of the drilling ramp 14 and the structural design of the drilling device results in a setup length between the entry point P1 of the rod into the ground 90 and the side of the drilling device 10 facing away from it, which is in Fig.1 is labeled L1. At the end of the drilling ramp 14 facing the entry point P1, a base plate 42 is arranged, which is pivotally connected to the remaining section of the drilling ramp 14 about a seventh axis of rotation 43. As a result, the base plate 42 can always be arranged parallel to the soil 90 or contact the soil 90 flatly, even at different entry angles α1. Furthermore, two rollers 45 are provided, which are arranged to rotate freely about a common axis of rotation, so that the drilling ramp 14 can be pushed and/or pulled over the soil 90.

For anchoring the base plate 42 or for anchoring the drilling ramp 14 to the soil 90, a unit 44 for inserting a total of two ground anchors 46 is provided. The unit 44 can be pivoted about an eighth axis of rotation 43 and/or about the axis of rotation of the rollers 45, so that the drill anchors 46 can be inserted into the ground 90 with different inclinations, in particular at an angle. The unit 44 thus serves as an anchoring unit 44 for the drilling device 10. Further details or alternative designs of the anchoring unit 44 are, for example, from the document DE 195 06 337 C1 known.

The drilling ramp 14 also includes breakaway devices 48, 50, with the help of which, in conjunction with the drive unit 18, rod sections 16a can be separated from each other and from the rod holder 20. Furthermore, a cooler 52 of a hydraulic unit, not shown, and a tank 54 for providing fuel for the hydraulic unit can be seen. Furthermore, a monitor 56 for a locating system of the drill head connected to the rod and an operating unit 58 for operating the breakaway device 48, 50 are connected to the drilling ramp 14. The operating unit for operating the drilling device 10 has been hidden for a better representation of the other components of the drilling device 10. However, the drilling device 10 can be in the In practice, it includes a control stand through which an operator can move the chassis 12 as well as operate and monitor the drilling device 10 during the drilling process.

The chassis 12, the arm 24, the drilling ramp 14 and the second hydraulic cylinder 36 form a coupling gear or a four-bar linkage. The second hydraulic cylinder 36 is preferably a variable-length member of the coupling gear.

Fig.2 shows another side view of the drilling device 10 Fig.1 . In contrast to the representation Fig.1 is the drilling ramp 14 of the drilling device 10 in Fig.2 shown in a second pivot position, ie the entry angle α1 Fig.1 has been increased to angle α2 by pivoting the drilling ramp 14. In the present exemplary embodiment, the angle α1 = 10° and the angle α2 = 19.1°. To pivot the drilling ramp 14, the first hydraulic cylinder 30 has been fully extended and the second hydraulic cylinder 36 has not yet been fully extended. By moving the lever 24, the drilling ramp 14 has also been moved away from the original entry point P1, so that the distance L2 between the new entry point P2 and the rear end of the drilling device 10 has been reduced. In a specific exemplary embodiment, the length has reduced from L1 = 5.269 m to L2 = 4.735 m.

Fig.3 shows another side view of the drilling device according to the Fig.1 and 2 . The drilling ramp 14 of the drilling device 10 is in Fig.3 shown in a third pivot position. For this purpose, both the first hydraulic cylinder 30 and the second hydraulic cylinder 36 have been extended further to their end position. In addition, the chassis 12 has been arranged in a position elevated by the distance L4 with respect to the ground at the entry point P3. As a result, an entry angle of the rod of α3 = 22 ° can be achieved in the drilling device 10. The required working length of the drilling device 10 between the new entry point P3 and the rear end of the drilling device 10 has further reduced to the length L3, specifically to 4.297 m in the specific exemplary embodiment.

The drilling ramp 14 has a first connection area 68 for connecting the arm 24 with the drilling ramp 14. Furthermore, the drilling ramp 14 has a second connection region 70 for connecting the arm 24 to the drilling ramp 14, the first connection region 68 and the second connection region 70 being at least at a distance from one another in the direction of the longitudinal axis of the drilling ramp 14. The second end of the arm 24 is optionally connectable to the first connection area 68 or to the second connection area 70. This allows different inclinations and different protrusion positions of the drilling ramp relative to the chassis to be achieved. The first and second hydraulic cylinders are then adjusted such that at least in a part of the adjustment range of the pivoting position of the drilling ramp 14, the base plate 42 as well as the chassis 12 are arranged on the surface of the ground, ie in the same plane.

Fig.4 shows a perspective view of the chassis 12 of the drilling device 10 according to Fig.1 to 3 , in which the two parallel chain drives 60, 62 are visible. In addition, the chassis 12 includes a support element 64, which, with the aid of a further hydraulic cylinder 66, moves into a support position in which the support element 64 is pressed against the soil 90 with a pressure force, and in a travel position in which the support element 64 does not touch the soil 90 can be contacted and moved. For a clearer illustration, the support element 64 and the hydraulic cylinder 66 are in the Fig.1 to 4 not shown.

The chain drives 60, 62 are each driven by a separate hydraulic motor. To lift the entire drilling device 10, 12 transport eyes 68, 70 are provided on the chassis, into which ropes of a crane can be suspended to lift the drilling device 10.

As in Fig.4 shown, the lever 24 includes side cheeks 24a, 24b, between which a section of the first hydraulic cylinder 30 is arranged. The longitudinal axis of the hydraulic cylinder 30 intersects in a vertical plane the connecting line between the first axis of rotation 26 and the second axis of rotation 28. The orthogonal connecting lines between the first axis of rotation 26 and the second axis of rotation 28, between the second axis of rotation 28 and the fourth axis of rotation 34 and between the fourth axis of rotation 34 and the first axis of rotation 26 form a triangle. In a special embodiment, the triangle can be an isosceles triangle, with the two legs of equal length being arranged between the first and fourth axes of rotation and between the second and fourth axes of rotation.

In a variety of advantageous embodiments, the leg between the first axis of rotation 26 and the second axis of rotation 28 is longer than the leg between the second axis of rotation 28 and the fourth axis of rotation 34 and/or between the first and the fourth axis of rotation.

In other embodiments, the first, second and fourth axes of rotation extend orthogonally to a straight line.

Fig.5 shows another side view of the drilling device 10 according to the Fig.1 to 4 . The side view Fig.5 shows the opposite side of the drilling device 10 compared to the illustrations Fig.1 to 3 . Furthermore, the drilling ramp has been pivoted into a driving position with the aid of the first hydraulic cylinder 30 and the second hydraulic cylinder 36, in which the drilling ramp is at a sufficient distance from the earth's surface 90. Furthermore, in the representation Fig.5 all elements of the drilling device 10 are shown, in particular the elements of the control stand 80 and a pump for pumping flushing fluid, which is pumped via the rod holder into the hollow rod sections 16a of the rod.

Fig.6 shows a simplified schematic representation of a side view of a drilling device 100 according to a second embodiment. The structure and function of the drilling device 100 largely correspond to the drilling device 10 according to the first embodiment Fig.1 to 5 agree. Elements with the same structure or function have the same reference numbers.

In contrast to the first embodiment according to Fig.1 to 5 the drilling device has 100 after Fig.6 a base plate 102, which has no travel rollers 45, but lies flat on the surface of the soil 90. On a representation of the drive units for moving the drive carriage 19 is shown in the simplified representation Fig.6 For a clearer representation of the components required to set different inclination angles α of the drilling ramp 14, the components required have been omitted. The representation of the drilling device 100 Fig.6 Both the hydraulic cylinder 30 and the hydraulic cylinder 36 are fully retracted, resulting in a pivot position or inclination of the drilling ramp of α = 10 °.

Fig.7 shows a side view of the drilling device 100 Fig.6 , wherein the drilling ramp 14 of the drilling device 100 is shown in a second pivoting position with an entry angle of α = 20 °. For this purpose, both the first hydraulic cylinder 30 and the second hydraulic cylinder 36 have been completely extended to their end positions.

Similar to the drilling device 10 Fig.3 is the chassis 12 of the drilling device Fig.8 has been arranged elevated relative to the contact surface of the base plate 42. Furthermore, the second hydraulic cylinder 36 is fully extended and the first hydraulic cylinder 30 is as shown Fig.7 somewhat retracted, so that the base plate 42 arranged at the front end of the drilling ramp 14, ie the end facing the entry point P1 to P3, is arranged in a lower level than the chain drives 60, 62 of the chassis 12. In the case in Fig.8 The pivoting position of the drilling ramp 14 shown results in an entry angle of the linkage of approximately 22°. In other embodiments, the distance between the first axis of rotation 26 and the second axis of rotation 28 caused by the lever 24 can be increased, so that this results in an increased adjustment range of the drilling ramp 14, so that in particular entry angles in the range between 10 ° and 30 °, in particular between 10° and 35° or between 10° and 40° are possible. At these entry angles, the base plate 42, 102 rests on the surface of the soil 90 in the same plane in which the chassis 12 also stands on the surface of the soil 90.

Reference symbol list

10, 100

Drilling device

12

chassis

14

drilling ramp

16

Linkage changer

16a

rod section

18, 22

Drive unit

19

Drive carriage

20

Rod mount

24

lever

24a, 24b

Side cheeks

26, 28, 32, 34, 38,

Axis of rotation

40, 43 30, 36

Hydraulic cylinder

42, 102

base plate

44

Anchoring unit

45 46

ground anchor

48.50

Breakaway device

52

cooler

54

tank

56

monitor

58

Control unit breakaway device

60.62

Chain drive

64

Support element

66

Hydraulic cylinder

68, 70

Connection area

80

Control station

82

pump

90

soil

P0

Direction

P1, P2, P3

Entry point

L1, L2, L3

Distance between entry point and distant end of the drilling device

L4

Distance elevated position

α, α1, α2, α3

Entry angle/swivel position

Claims (13)

1. Drilling device, in particular for the directionally guided horizontal ground drilling,

   with a chassis (12) and with a drilling ramp (14), the drilling ramp (14) serving to hold and guide a drill pipe,

   with a pivotable arm (24), the first end of which is rotatably connected to the chassis (12) about a first axis of rotation (26) and the second end of which is rotatably connected to the drilling ramp (14) about a second axis of rotation (28),

   with a first hydraulic cylinder (30) for pivoting the arm (24) about the first axis of rotation (26), the first end of the first hydraulic cylinder (30) being rotatably connected to the chassis (12) about a third axis of rotation (32) and the second end of the first hydraulic cylinder (30) being rotatably connected to the arm (24) about a fourth axis of rotation (34), and

   with a second hydraulic cylinder (36) for pivoting the drilling ramp (14) about the second axis of rotation (28), the first end of the second hydraulic cylinder (36) being rotatably connected to the chassis (12) about a fifth axis of rotation (38) and the second end of the second hydraulic cylinder (36) being rotatably connected to the drilling ramp (14) about a sixth axis of rotation (40),

   with a control unit for controlling the first hydraulic cylinder (30) and for controlling the second hydraulic cylinder (36),

   characterized in that, at an end of the drilling ramp (14), a contact area (42, 102) for resting on the ground (90) is provided, at least the contact area (42, 102) of the drilling ramp (14) projecting laterally beyond the chassis (12),

   wherein, in order to increase the angle of entry (α) of the drill pipe into the ground (90), the control unit controls the first hydraulic cylinder (30) such that the second axis of rotation (28) is moved upwards on a circular path around the first axis of rotation (26) by a vertical distance and thus also away from the point of entry of the drill pipe in a horizontal direction, wherein the control unit additionally controls the second hydraulic cylinder (36) such that the drilling ramp (14) is rotated about the second axis of rotation (28) so that the contact area is arranged in the same horizontal plane at least before and after the change in the angle of entry (α).
2. The device according to claim 1, characterized in that the chassis (12), the arm (24), the drilling ramp (14) and the second hydraulic cylinder (36) form a coupling gear, wherein the second hydraulic cylinder (36) is a variable length member.
3. The device according to one of the preceding claims, characterized in that the fourth axis of rotation (34) runs in a horizontal plane that is arranged between the horizontal planes in which the first axis of rotation (26) and the second axis of rotation (28) run or in that the fourth axis of rotation (34) and the second axis of rotation (28) lie on the same straight line.
4. The device according to one of the preceding claims, characterized in that the drilling ramp (14) comprises a third drive unit (18), preferably a hydraulic motor, for rotating and axially advancing the drill pipe.
5. The device according to one of the preceding claims, characterized in that the contact area is formed by a base plate (42, 102) connected to the drilling ramp (14) and pivotable about at least a seventh axis of rotation (43), and in that a control unit controls the second hydraulic cylinder (36) such that, during an adjusting movement of the first hydraulic cylinder (30), it executes an adjusting movement such that the seventh axis of rotation (43), after the adjusting movements of the hydraulic cylinders (30, 36), is arranged in the same horizontal plane as before the adjusting movement.
6. The device according to one of the preceding claims, characterized in that, in order to increase the angle of entry (α) at least up to a certain angle of entry (α), the control unit controls the first hydraulic cylinder (30) such that the second axis of rotation (28) is moved upwards on a circular path around the first axis of rotation (26) by a vertical distance, and in that the control unit controls the second hydraulic cylinder (36) such that the drilling ramp (14) is rotatable about the second axis of rotation (28) so that the contact area (42, 102) is arranged in the same horizontal plane at least before and after the change in the angle of entry (α).
7. The device according to one of the preceding claims, characterized in that, in order to reduce the angle of entry (α) at least from a certain angle of entry (α), the control unit controls the first hydraulic cylinder (30) such that the second axis of rotation (28) is moved downwards on a circular path around the first axis of rotation (26) by a vertical distance, and in that the control unit controls the second hydraulic cylinder (36) such that the drilling ramp (14) is rotated about the second axis of rotation (28) so that the contact area (42, 102) is arranged in the same horizontal plane at least before and after the change in the angle of entry (α).
8. The device according to one of the preceding claims, characterized in that the control unit controls the second hydraulic cylinder (36) such that, during an adjusting movement of the first hydraulic cylinder (30), it executes an adjusting movement such that the seventh axis of rotation (43) remains in the same horizontal plane during the adjusting movements of the hydraulic cylinders (30, 36).
9. The device according to one of the preceding claims, characterized in that the drilling ramp (14) comprises at least one anchoring unit (44) for anchoring the drilling ramp (14) to the ground (90).
10. The device according to one of the preceding claims, characterized in that the angle of inclination of the drilling ramp (14) and/or of the drill pipe is adjustable with the aid of the first and the second hydraulic cylinder (30, 36) by an angular range between 10° and 30°, in particular by an angular range of 20°.
11. The device according to one of the preceding claims, characterized in that the drilling ramp (14) can be inclined relative to the chassis such that an angle of entry (α) of the drill pipe can be set in the range between 10° and 30°, in particular between 10° and 25°.
12. The device according to one of the preceding claims, characterized in that the drilling ramp (14) has a first connecting portion (68) for connecting the arm (24) to the drilling ramp (14) and that the drilling ramp (14) has a second connecting portion (70) for connecting the arm (24) to the drilling ramp (14), wherein the connecting portions (68, 70) have at least a distance to each other in the direction of the longitudinal axis of the drilling ramp (14), that the second end of the arm (24) is selectively connectable to the first connecting portion (68) or to the second connecting portion (70).
13. The device according to one of the preceding claims, characterized in that at least a sensor is provided for detecting a pivot position of the drilling ramp (14) relative to the chassis (12) and/or the travel position of the first and/or second hydraulic cylinder (30, 36).

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