EP1228287B1 - Device for transferring rods - Google Patents

Abstract

The invention relates to a rod transfer device for horizontal driving units for underground trenchless driving, having a storage container and a pivotable gripper, the gripper being arranged in such a way that the orbit of the gripper intersects both the transfer region of the storage container and the drilling axis.

Description

The invention relates to a device for linkage transfer for Horizontalvortriebsgeräte for underground trenchless jacking and takes the priority of the German patent application 199 53 458.6-24 to complete.

When horizontal propulsion, such as trenchless earth drilling by means of a rotary feed device, the linkage located in the bore is continuously extended by adding individual rod sections or continuously shortened by removal, such as when expanding a pilot hole. This is done by placing the rod sections in the drilling axis and connecting them to the end of the drill string located in the ground. The rod sections can be arranged, for example, in a storage container in the region of the drill, wherein an operator inserts the rod sections individually into the drilling axis.

Since inserting by hand the rod sections involves a considerable risk of injury and usually requires additional manpower, various automatic rod magazines have been developed that allow automatic insertion of the rod sections from the reservoir into the drilling axis.

Such a rod magazine is described for example in German Patent Application 196 10 883. In this device, the reservoir is located above the drilling axis and has in its lower part a transfer tray. For the removal of the transfer tray, in which there is a rod section, moved into the drilling axis, fixed the rod section and process the reservoir back to its original position. However, this rod magazine is only suitable for low change speeds, since at each linkage transfer the entire reservoir must be moved vertically.

Another technique of automatic linkage transfer uses a gripper, which carries the rod sections from a reservoir in the drilling axis. Such a rod magazine is known for example from German Patent Application 197 12 641. In such linkage magazines, the rod sections from the reservoir are rotated by the gripper to a position in the vicinity of the drilling axis and then moved by extending the gripper by means of a parallel displacement in the drilling axis. A similar device is described in U.S. Patent No. 5,556,253. These devices have the disadvantage that the gripper in addition to the rotation must be able to move the drill string axially. The swivel arm of the gripper must therefore be e.g. have a special cylinder for axial displacement of the gripper.

In the device described in US Pat. No. 5,607,280, the rod sections are pivoted by a gripper from a transfer position directly into the drilling axis. This device has juxtaposed linkage compartments, which contribute to a reduction of the noise during slippage of the linkage. When a boom section is removed, the superimposed rod sections slip down due to gravity. As every pole compartment has its own transfer position, the linkage located in the transfer position must be moved into the pivot axis of the gripper to be available for pivoting into the drilling axis. For this purpose, the device described has a carriage with a plurality of tube pockets, with which the rod sections can be moved successively in the pivot axis of the gripper. The device described therefore avoids the design effort of an axially movable gripper, but replaces it with an axially movable carriage, whereby the parallel displacement is only vorverlagert.

The invention is based on the object to provide a device for linkage transfer for Horizontalvortriebsgeräte, in which the aforementioned disadvantages are avoided.

The object is achieved by a rod magazine according to claim 1. Advantageous embodiments can be found in the dependent claims. The object is further achieved by the method claims.

The principle of the invention is to arrange a gripper so that the circular path of the gripper cuts both the linkage of the reservoir for the linkage elements and the drilling axis and the gripper thereby designed so that it unlocks a locking element during pivoting in the linkage transfer and thereby the Linkage release releases.

The device according to the invention makes it possible to introduce rod sections by means of a gripper in a two-step process from a storage container into a drilling axis. For this purpose, the gripper can be pivoted back and forth between two end positions, namely between the drilling axis and the transfer position, without interrupting the gripper movement, since the movement of the gripper into its end position unlocks the locking element of the transfer position while pivoting out of the gripper from the transfer position in turn takes place a lock by the locking element. This avoids complex and sensitive multi-step pivoting, since falling out of the rod sections from the shaft located in the transfer position no longer must be prevented by the transfer position is locked manually before the complete swinging out of the gripper. The gripper can thus be pivoted from the transfer position directly into the drilling axis and from the drilling axis directly into the transfer position.

It is particularly advantageous if the gripper has a lifting contour on its side which first enters the transfer position on pivoting in, which raises the rod assembly in the transfer position and thus facilitates unlocking of the locking element, since this can now be unlocked without load.

In a further advantageous embodiment of the invention, the locking element consists of a locking flap, which is arranged pivotably below the transfer position and is held by spring force in the locking position. When swinging the gripper into the transfer position, this locking flap can then be moved out by means of a gripper arranged driver element against the spring force from the locking position, so that the transfer position is released and a rod section can move into the receptacle of the gripper.

Furthermore, the device according to the invention can have a lifting hydraulics in the region of the transfer position. This allows, during the dismantling of the boom in the transfer position pivoted rod sections against gravity to move from the gripper receptacle in the boom shaft.

Preferably, the reservoir has a plurality of rod shafts and is horizontally displaceable, so that each slot can be moved to the transfer position.

The invention is explained below with reference to an embodiment shown in the drawing of the closer.

Fig. 1

eine schematische Darstellung der erfindungsgemäßen Vorrichtung zur Gestängeübergabe auf einer Bohriafette;

Fig. 2

einen Schnitt durch die Vorrichtung der Fig. 1 bei der Übergabe des Gestängeschusses in die Bohrachse mit Vorratsbehälter;

Fig. 3

eine Vorderansicht der erfindungsgemäßen Vorrichtung;

Fig. 4

eine Detailansicht des Verriegelungselementes;

Fig. 5

eine Detailansicht des Greifers mit Verriegelungselement;

Fig. 6

eine weitere Detailansicht des Greifers mit Verriegelungselement und Vorratsbehälter.

In the drawing show:

Fig. 1

a schematic representation of the device according to the invention for linkage transfer on a Bohriafette;

Fig. 2

a section through the apparatus of Figure 1 in the transfer of the rod section in the drilling axis with reservoir.

Fig. 3

a front view of the device according to the invention;

Fig. 4

a detailed view of the locking element;

Fig. 5

a detailed view of the gripper with locking element;

Fig. 6

another detail view of the gripper with locking element and reservoir.

The device according to the invention for linkage transfer 1 is arranged on a tracked vehicle 2 with a rotary motor 3 and a feed motor 4 as well as a breaking and loosening device 5. In Fig. 1, the transfer, to which a reservoir in the form of a boom box belongs, shown without reservoir, so that rod sections 6 are recognizable.

2 to 5, the boom box 11 with arranged in partitions by partition walls 12 to 14 compartments rod sections 6 can be seen.

Below the boom box 11 is a lifting device 120 in the form of lifting cylinders 121,122. With the help of the lifting cylinder, the rod sections can be moved between an upper and lower position. In the upper position of the lifting cylinder closes the transfer position of the boom box 11, thus preventing falling out in the transfer position located and superposed rod sections. 6

In the front and rear region of the device for transferring the linkage 1 there is in each case a gripper 31 with a lifting contour 110, a hook 32 and a locking pin 33. The gripper is arranged rotatably on a shaft 34 with the aid of a pivoting cylinder 35. The lifting contour 110 is arranged so that a in the transfer position of the boom box 11 befindlicher and resting on a locking flap 100 linkage boom is raised when the gripper pivots into the transfer position. The locking flap 100, which is then freed from the rod section 6, is pivoted outwardly by the pivoting frame 31 on a gripper frame driver pin 150 from the transfer position against the force of a spring 105, so that the rod section on the lifting contour 110 in the boom receptacle 135 of Gripper 31 slides.

The locking pin 33 is arranged in a guide 36 and arranged with its foot 37 in a curved path 38. The locking pin 33 follows the curved path 38 when pivoting the gripper 31 in the guide 36. The hook 32 is rotatable about a shaft 41 via a hook cylinder 40 and is otherwise held by a tension spring 42 in a "closed" position.

For pivoting a rod assembly 6 in the drilling axis B of the gripper with the help of the pivot cylinder 35 is moved under the boom box 11 in the transfer position of the boom box 11. With the help of the lifting contour 110 of the lower rod section is raised by the pivoting operation and the locking flap 100 is pushed out of the transfer position by the driving pin 131 arranged on the gripper 31. As soon as the gripper 31 has reached its receiving position below the transfer position, the rod projectile slides over the lifting contour 110 into the gripper receptacle 135.

In this position, the locking pin 33 is in its locking position, since the cam track 38 causes due to their geometry in this position, a protrusion of the locking pin 33. At the same time, the hook 32 may be in the "open" position by the hook cylinder 40. When pivoting the gripper into the transfer position of the lowest rod section 6 follows the gravity and slips into the receptacle 135 of the gripper 31. As soon as the first rod section 6 comes to rest in the receptacle of the gripper 31, the gripper with the aid of the pivoting cylinder 35 in the direction of Drilling axis pivots. When swinging out of the gripper 31 under the boom box 11 of the hook 32 via a switch (not shown), which operates the hook cylinder 40 is moved from its "open" position to its "closed" position. At the same time the locking pin 33 is retracted by the foot 37 of the locking pin follows the surface of the cam track 38.

When swinging out of the gripper 31 under the boom box the locking flap 100 is released at the same time and moved by a spring 105 in the locking position to prevent falling out of a second rod section 6. By choosing the arrangement of the driving pin 150, the time can be set in relation to the position of the lifting contour, in which the locking flap so einschwenkt in the transfer position that a load-free pivoting of the locking flap possible and simultaneously falling out of the rod section is excluded. This applies to swinging out in reverse order.

As soon as the gripper 31 with its receptacle and the linkage 6 located therein is in the drilling axis B, the linkage can be connected to the linkage located in the drilling axis and the rotary motor 3. In this case, the hook cylinder 40 can be released so that the tension spring 42 holds the hook in a "closed" position, however, this allows axial displacement of the rod section 6 for screwing.

In a preferred embodiment, a lifting cylinder is provided, which is movable in the transfer position. After pivoting of the gripper in the transfer position when linkage removal located immediately below the transfer position lifting cylinder 121, 122 is raised or lowered during linkage construction, so that the rod located in the transfer position from the or enters the receptacle of the gripper. Once a linkage compartment is filled or emptied, the lifting cylinder is moved to the transfer position of the boom box, so that it is closed. Then the boom box is moved horizontally by means of a mechanism 160, 161 by one bay width until the next slot has reached the transfer position.

Preferably, the rod compartments are emptied from the inside to the outside, starting from the drilling axis. The operator can then observe the filling state of the boom box 11 via a viewing window 50.

The device according to the invention also allows insertion of a rod section 6 by hand, for example, when the rod sections located in the boom box 11 6 are not available in sufficient numbers to complete the drilling process. For this purpose, the gripper 31 is pivoted under the boom box 11, so that it protrudes on the side facing away from the drilling axis side of the boom box 11. In this position, a rod shot can easily insert by hand and pivot in the manner described in the drilling axis B.

The boom box 11 has in its lower region sockets 60 for inserting locking bolts, whereby a trouble-free removal and transport of the boom box 11 is ensured.

Claims (15)

1. String-transfer apparatus for horizontal drilling machines for trenchless underground drilling, having a magazine (11) and a pivotable gripper (31), the gripper (31) being so arranged that the circular path of the gripper intersects both the transfer position at the magazine (11) and the drilling axis (B), characterised in that when it pivots into the transfer position the gripper (31) unlocks a locking member.
2. Apparatus according to claim 1, characterised in that the gripper (31) has a raising contour (110) which, when the gripper pivots into the transfer position, raises a string section (6) which is in the transfer position, before the string receiving member (135) of the gripper (31) reaches the transfer position at the magazine (11).
3. Apparatus according to claim 1 or 2, characterised in that the locking member is in the form of a flap-action member (100) which is held in its locking position in the region of the transfer position at the magazine (11) by resilient force and is moved out of the locking position by an entraining member (150) on the gripper (31) when the gripper (31) pivots into the transfer position.
4. Apparatus according to one of the preceding claims, characterised in that the magazine (11) is arranged next to the drilling axis (B) and above the horizontal plane in which the latter lies.
5. Apparatus according to one of the preceding claims, characterised in that the magazine (11) is displaceable horizontally, thus enabling the string compartments to be moved to the transfer position.
6. Apparatus according to one of the preceding claims, characterised in that the gripper (31) is arranged to be able to be pivoted out below the magazine on the opposite side of the magazine (11) from the drilling axis(B) to allow a string section (6) to be inserted in by hand.
7. Apparatus according to one of the preceding claims, characterised in that the gripper (31) has a claw (32) which is preloaded to its "closed" position by a compression or tension member.
8. Apparatus according to one of the preceding claims, characterised in that the gripper (31) has an axially displaceable locking member (33) whose axial position is controlled by a cam-action track (38).
9. Apparatus according to one of the preceding claims, characterised in that, by its foot (37), the locking member (33) is arranged in a guide (36).
10. Apparatus according to one of the preceding claims, characterised in that, when the gripper (31) pivots below the magazine (11), the claw (32) is automatically moved over to its "open" position.
11. Apparatus according to one of the preceding claims, characterised in that the cam-action track (38) is of a form such that the locking member (33) remains in the locking position at the time of the pivoting below the magazine (11), whereas it is withdrawn at the time of the pivoting out.
12. Apparatus according to one of the preceding claims, characterised by a reciprocating means (120, 121, 122) for raising and lowering the string sections 6) situated in the transfer position.
13. Apparatus according to one of the preceding claims, characterised in that the magazine is arranged to have vertical partitions which form the individual magazine compartments (12, 13, 14) and has at the bottom a terminal region having closing-off members (130, 140), the closing-off members (130, 140) producing a transfer position for string transfer, and the magazine (11) is mounted to be horizontally displaceable on the closing-off members (130, 140) to allow the magazine compartments (12, 13, 14) to be moved to the transfer position.
14. Method of moving string sections from the transfer region of a magazine onto the drilling axis of a horizontal drilling machine by means of a gripper, characterised in that the string section (6) is rotated onto the drilling axis (B) directly from a transfer position below a magazine (11) along a circular path described by the gripper (31) and, when it pivots into the transfer position, the gripper (31) unlocks a locking member.
15. Method according to claim 14, characterised in that, at a string transfer, the transfer region of the magazine (11) is cleared by means of the gripper (31) and the string section (6) is fed to the gripper (31) from above, by gravity.

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