Attachment for construction machinery

Abstract

An attachment for a mobile construction machine, in particular a wheel loader, for transporting and changing the position of drilling tools and drill pipes, comprising a base plate (1), a cylindrical, open pipe (2) arranged vertically on the base plate and connected thereto for receiving a drilling tool (3) or drill pipe, and a connecting device (6, 7) for connecting the attachment to a mobile construction machine, wherein - the cylindrical tube (2) is connected to the base plate (1) at one of the two tube ends, so that the latter partially or completely closes the tube end, and the opposite tube end is open, - the inner diameter (d) of the cylindrical tube (2) is selected so that the drilling tool (3) or drill pipe can be inserted through the open pipe end, - the cylindrical tube (2) has a slot (5) extending in its longitudinal direction, the width (b) of which is smaller than the diameter of the drilling tool (3) or drill pipe, - the connecting device (6, 7) is arranged on the side of the pipe circumference opposite the slot and is connected to the pipe (2) and / or the base plate (1).

Description

[0001] The invention relates to an attachment for a construction machine, in particular for a wheel loader, which can be used in the field of special foundation engineering for transporting and manipulating drilling tools and drill pipes. The attachment enables, in particular, the safe transport and repositioning of drilling tools and drill pipes from a horizontal to a vertical position and in the opposite direction.

[0002] The invention further relates to a mobile construction machine with an attachment mounted thereon.

[0003] The Kelly drilling method, which is widely used in special foundation engineering, uses a drill rod (Kelly rod) that is usually telescopic in several ways and is threaded into the drill drive of a rotary drilling rig. The lower end of the rod has a square (Kelly square) for holding an interchangeable drilling tool.

[0004] To attach a drilling tool to the square end of the Kelly bar, the drilling tool must first be placed in an upright position so that the square end can be threaded into the Kelly box located at the top of the drilling tool and secured with bolts. Raising the drilling tool into the upright position is usually done with the help of a hanger and the auxiliary winch on the drilling rig.

[0005] However, the problem is that the drilling rig cannot be lifted centrally, but hangs slightly tilted when erected because the drilling rig's auxiliary winch is located outside the axis of the Kelly bar, and the drilling tool, due to its shape, does not remain in an upright position on its own. Therefore, the drilling tool must be additionally held during the threading process, which is usually done using a wheel loader with attached pallet forks. However, this method neither adequately secures the drilling tool against tipping over nor can it be held sufficiently vertically.

[0006] As a result, threading the Kelly square into the Kelly box is significantly more difficult, and the process also poses a significant safety risk for drilling personnel performing these activities or in the vicinity of the drilling rig. Furthermore, there is a risk that if the drilling tool falls over, not only the tool itself but also the rotary drilling rig could be damaged.

[0007] The fastening and securing of the drilling tool with bolts ("bolting"), which is necessary after threading, also carries a risk of accidents, as this step usually has to be performed at a height of several meters. For example, in the case of augers, bolting takes place at a height of three meters. The drilling assistant usually climbs up a ladder leaning against the auger to insert a bolt weighing approximately 15 kg and secure it on the opposite side by driving in a safety bracket with a hammer. However, it is almost impossible to securely attach the ladder to an auger.

[0008] To create a cased borehole using the Kelly drilling method, drill pipes are inserted into a borehole by screwing them in. The screwing in is achieved using the rotary drive of the rotary drilling rig, which is connected to the drill pipe via a pressure pipe.

[0009] In order to attach a drill pipe to the pressure pipe, the drill pipe can be centrally and thus vertically aligned using a hanger. However, due to its length (e.g., up to 6 m) and the small contact area on the typically uneven subsoil, a drill pipe cannot stand on its own. Instead, it must be held with the help of a wheel loader with attached pallet forks to prevent it from tipping over. However, this method does not adequately secure the drill pipe against tipping over. In addition, the inadequate vertical alignment makes it very difficult to pick up the drill pipe and connect it to the pressure pipe. The lack of stability also poses a danger to the drilling personnel and the rotary drilling rig.

[0010] Furthermore, when creating cased boreholes, it is common practice to drive the required drill pipes approximately one meter deep into the ground next to the rotary drilling rig. This avoids having to repeatedly set the drill pipes down and then later re-erect them to create a new pile when cutting off the drill string (i.e., when unscrewing and removing the drill pipes from the drill string). However, these drill pipes driven into the ground also pose a significant hazard to drilling personnel, as they cannot be secured against falling over.

[0011] Furthermore, screwing the pipes into the ground is also disadvantageous because it abrades the socket portion of the pipes, causing significant wear at the socket portion. This means that a positive connection is no longer guaranteed, which in turn leads to a significant increase in wear-and-tear repairs.

[0012] The transport of drilling tools and drill pipes on a construction site is usually carried out using a wheel loader with an attached pallet fork. The drilling tool or drill pipe rests on the pallet fork perpendicular to the wheel loader. The pallet fork is tilted slightly backward to prevent the drilling tool or drill pipe from falling forward. However, this cannot prevent the drilling tool or drill pipe from slipping sideways or even falling off the pallet fork. One reason for this is that both the pallet fork and the drilling tools or drill pipes are made of steel, resulting in low sliding friction, which makes it easier for the transported drilling tools or drill pipes to slip or fall.

[0013] In view of the disadvantages of the prior art described above, the object underlying the invention was to provide a device and method to facilitate the transport, manipulation (i.e., changing the position or positioning in space), as well as assembly and disassembly of drilling tools and drill pipes, and to make them safe, quick, and more cost-effective. In particular, the object was to be able to move drilling tools and drill pipes safely, quickly, and cost-effectively from a lying to an upright position (and vice versa), and to position drilling tools or drill pipes as vertically as possible for the threading process on a Kelly bar or a pressure pipe and to hold them securely.

[0014] These objects are achieved with an attachment according to the main claim, as well as by the embodiments specified in the dependent claims.

[0015] Accordingly, the present invention relates to an attachment for a mobile construction machine, in particular a wheel loader, which is suitable for transporting and changing the position (as described above) of drilling tools and drill pipes. Due to its suitability for changing the position of the aforementioned objects, the attachment also functions as a manipulator.

[0016] The attachment comprises a base plate, a cylindrical, open tube arranged vertically on the base plate and connected thereto for receiving a drilling tool or drill pipe, as well as a connecting device for connecting the attachment to a mobile construction machine, wherein - the cylindrical tube is connected to the base plate at one of its two ends, so that the base plate partially or completely closes the end of the tube, and the opposite end of the tube is open, - the inner diameter of the cylindrical tube is selected so that the drilling tool or drill pipe can be inserted through the open pipe end, - the cylindrical tube has a slot running in its longitudinal direction, the width of which is smaller than the diameter of the drilling tool or drill pipe, - the connecting device is arranged on the side of the pipe circumference opposite the slot and is connected to the pipe and / or the base plate.

[0017] Drilling tools and drill pipes, such as those used primarily in special foundation engineering for rotary drilling methods, especially the Kelly drilling method, are known to those skilled in the art. In the context of the present invention, particular mention should be made of rotary drilling tools such as auger bits, box drills, core drills, special tools such as core cutters and rock catchers, and also drop chisels.

[0018] The attachment is intended for attachment to a mobile (i.e., mobile) construction machine, in particular a wheel loader. Commercially available wheel loaders or other mobile construction machines, e.g., tractors, are generally equipped with a tiltable lifting frame, which also serves to attach attachments. Mobile construction machines equipped in this way are particularly suitable for use with the attachment according to the invention.

[0019] The aforementioned cylindrical, open tube is attached vertically to the base plate of the attachment, preferably welded on, and serves to hold a drilling tool or drill pipe.

[0020] The pipe is called “open” because the slot forms an opening in the pipe wall. The tube is called "cylindrical" because its cross-section corresponds to a circle or (in the area of ​​the slot) an arc with the same radius and center point. This radius and center point determine the base area of ​​the cylindrical tube. The tube has a basic cylindrical shape, regardless of the opening formed by the slot.

[0021] The tube end attached to the base plate is at least partially or preferably completely closed by the base plate, while the opposite tube end is open. The base plate thus forms the bottom of the cylindrical tube. Preferably, the area of ​​the base plate is larger than the circular base area of ​​the cylindrical tube.

[0022] The inner diameter of the cylindrical tube is selected so that the drilling tool or drill pipe can be inserted through the open end of the tube. This means that the selected inner diameter of the cylindrical tube is larger than the diameter of the drilling tool or drill pipe that the cylindrical tube is intended to accommodate.

[0023] For commercially available drilling tools and drill pipes, the drilling tool diameter or the drill pipe diameter (outer diameter) is typically in the range of 0.2 to 2 m (e.g. 620 mm, 750 mm, 800 mm, 880 mm, 900 mm, 1000 mm, 1080 mm, 1180 mm, 1300 mm, 1500 mm, 1800 mm, 2000 mm; these are common standard dimensions).

[0024] Preferably, the inner diameter of the cylindrical tube is selected such that there is clearance between the inner wall of the tube and a drilling tool or drill pipe inserted concentrically into the tube, so that the respective drilling tool or drill pipe can be displaced within the cylindrical tube. For this purpose, it is generally sufficient if the inner diameter of the cylindrical tube is at least 20 mm, preferably at least 30 mm, and in particular at least 50 mm, larger than the diameter of the respective drilling tool or drill pipe for which the attachment is intended.

[0025] On the other hand, an excessive difference between the inner diameter of the cylindrical tube and the diameter of the drilling tool accommodated therein could have adverse effects, as this could lead to an unstable position or tilt of the drilling tool within the cylindrical tube. Therefore, this difference should preferably be less than 300 mm, especially less than 200 mm.

[0026] When using the attachment for drill pipes - unlike in the case of drilling tools described above - larger differences between the inner diameter of the cylindrical pipe and the drill pipe diameter are possible, since drill pipes can stand stably on the base plate of the attachment due to their flat front surface (female part) and are not prone to tipping.

[0027] Generally, the attachment is manufactured for different drill pipes or drilling tools in different sizes, with the inner diameter of the cylindrical tube being adapted to the respective diameter of the drill pipe or drilling tool, as described above. However, the inner diameter of the cylindrical tube can also be selected so that it is suitable for receiving drilling tools or drill pipes with a similar diameter (e.g. 620 or 640 mm; 880 or 900 mm). For example, a cylindrical tube with an inner diameter of 670 mm or 950 mm is suitable for drilling tools or drill pipes with a diameter of 620 or 640 mm or 880 or 900 mm. Generally, a cylindrical tube with a certain diameter is suitable for receiving drill pipes of different diameters.

[0028] The cylindrical shape of the pipe and the likewise cylindrical shape of the drill pipes result in an essentially concentric arrangement when a drill pipe is inserted into the pipe, as provided by the invention. The same applies to drilling tools, which at least partially (in the area of ​​their usable length) have a circular cross-section or a cylindrical outer surface. The concentric arrangement - and the flat base plate of the attachment - ensure that the drilling tool or drill pipe aligns itself automatically and optimally vertically in the cylindrical pipe, thereby facilitating handling and, in particular, connecting (threading) it to the Kelly bar or connecting the drill pipe to the pressure pipe.

[0029] The length of the cylindrical tube is preferably selected such that the Kelly box of the respective drilling tool for which the attachment according to the invention is to be used is located outside the open tube end of the cylindrical tube, i.e. protrudes from the tube when the drilling tool has been fully inserted into the tube. This facilitates threading of the Kelly box and assembly. The tube length is therefore preferably selected such that it is shorter than the total length of the respective drilling tool. However, the tube length should preferably correspond to at least one-third of the length of the respective drilling tool (without Kelly box), more preferably at least half the length of the drilling tool, in order to increase safety during transport and handling. The length of commercially available drilling tools is typically in the range of approximately 1 to 3 m.

[0030] The same applies to the selection of the length of the cylindrical tube if it is intended to accommodate drill pipes. In this case, the length of the cylindrical tube is preferably selected such that the pipe connector part (male part) is located outside the open pipe end of the cylindrical tube, i.e., protrudes from the pipe when the drill pipe has been fully inserted into the pipe. This facilitates the establishment of the connection between the pressure pipe and the drill pipe. The pipe length is therefore preferably selected so that it is shorter than the total length of the respective drill pipe.

[0031] However, the pipe length should preferably be at least one-quarter of the total length of the respective drill pipe, more preferably at least one-third of the drill pipe length, to increase safety during transport and handling. Commercially available drill pipes typically range in length from 1 to 6 m.

[0032] Preferably, the cylindrical tube is dimensioned to accommodate various commonly used drilling tools and drill pipes. For example, a tube length of 1.80 to 2.0 m, particularly 1.85 m, is suitable for most drilling tools and drill pipes with a length of 2 m or more and is therefore preferred.

[0033] According to a preferred embodiment, the length of the cylindrical tube is selected such that it is equally suitable for the drill pipes used in the respective drilling operation and for the drilling tool (in particular, the auger) used for drilling. This makes it possible to use the same attachment alternately for manipulating (and transporting) drill pipes and drilling tools during a drilling operation, thus eliminating the need for a changeover process.

[0034] The thickness of the tube wall of the cylindrical tube is at the discretion of the person skilled in the art. It is preferably at least 10 mm, in particular at least 15 mm; a wall thickness in the range of 12 to 15 mm is particularly preferred. For larger tube diameters, for example, to accommodate drill pipes or drilling tools with a diameter in the range of 1300-2000 mm, an increase in the wall thickness to 18 mm or more may be necessary.

[0035] To stiffen the cylindrical tube, stiffening plates or stiffening rings can be attached to it. According to a preferred embodiment, the cylindrical tube has one, two, or more laterally attached stiffening plates on its outer surface (lateral surface), preferably arranged in pairs opposite one another. The stiffening plates are preferably arranged vertically on the base plate and connected to the base plate and the cylindrical tube at their edges.

[0036] Alternatively or additionally, a stiffening ring can be attached to the outside of the pipe at or near the open end. This ring is preferably interrupted in the area of ​​the slot.

[0037] If necessary, additional stiffening rings can be installed, especially for larger pipe diameters to improve stability, especially against bending stress or against failure of the open cross-section.

[0038] According to the present invention, the tube has a slot running in its longitudinal direction (longitudinal slot), the width of which is smaller than the diameter of the drilling tool or drill pipe for which the cylindrical tube is intended. Preferably, the slot width is a maximum of 90%, in particular a maximum of 85%, of the diameter of the drilling tool or drill pipe for which the cylindrical tube is intended. The information regarding the slot width refers to the distance between the opposite edges of the slot or, if applicable, the insertion strips attached thereto.

[0039] The slot is located on the side of the pipe opposite the connecting device, so that when the attachment and thus the pipe is tilted into the horizontal position, the slot is on the underside, i.e. aligned towards the ground (soil).

[0040] Preferably, the slot extends over the entire length of the tube, i.e., from the base plate to the open end of the tube. The slot edges preferably run straight and parallel to the axis of the cylindrical tube.

[0041] The width of the slot is always selected to prevent the drilling tool or drill pipe located in the pipe from falling out through the slot when the attachment, and thus the pipe, is tilted from a vertical position to a horizontal position via an inclined position, and vice versa. If the slot width—as provided by the invention—is smaller than the diameter of the respective drilling tool or drill pipe, this can prevent it from falling out through the slot.

[0042] The width of the slot corresponds - in relation to the circular cross-section of the cylindrical tube - to a chord of a circle with a central angle α, where the central angle α is the angle between the radii (or legs) extending from the center M of the circular tube cross-section to the edges of the slot (see Fig. 5).

[0043] The longitudinal slot provided according to the invention significantly facilitates both the insertion of a drilling tool or drill pipe into the cylindrical pipe and the removal of a drilling tool or drill pipe from the cylindrical pipe, because this longitudinal slot allows the drilling tool or drill pipe located in the pipe to make contact with the ground when the attachment, and thus the pipe, is tilted into a horizontal position and lowered to the ground. The drilling tool or drill pipe located in the pipe partially protrudes downwards from the slot (due to its weight) and can touch the ground or penetrate it.

[0044] The extent of ground contact depends on the width of the slot, meaning that ground contact increases with increasing slot width. Generally, a slot width corresponding to a center angle of at least 40° is sufficient to achieve the aforementioned effect. This effect can be further enhanced by increasing the slot width (up to a center angle of, for example, 60°, 80°, 120°, or 140°).

[0045] Furthermore, an increase in the slot width is advantageous if the cylindrical tube of the attachment is to be used, for example, to pick up drilling tools lying on the ground and partially sunk into the soil and insert them into the tube (see Fig. 6C).

[0046] In view of the aspects described above, the slot width is therefore preferably selected such that it corresponds to a center angle α in the range from 40° to 140°, preferably from 60° to 120°, in particular from 80° to 110°. For smaller drill pipe or drilling tool diameters (e.g., 620-1180 mm), a slot width with a center angle α in the range from 40° to 80° is preferably selected, and for larger drill pipe or drilling tool diameters (e.g., 1300-2000 mm), a slot width in the range from 90° to 140° is preferably selected.

[0047] To pick up a drilling tool or drill pipe from the ground and insert it into the cylindrical pipe, the attachment is aligned horizontally with the aid of the construction machine (in particular a wheel loader) to which it is mounted, so that the longitudinal slot is on the underside (i.e., facing the ground), and the pipe of the attachment is brought by the construction machine to the height of the drilling tool or drill pipe lying on the ground, with the open pipe end being positioned essentially concentrically in front of the drilling tool or drill pipe. The cylindrical pipe can then be pushed or pulled, open end first, over the drilling tool or drill pipe lying on the ground by a corresponding travel movement of the construction machine until the drilling tool or drill pipe is fully received in the pipe (i.e., until it abuts the base plate).The advantage here is that the drilling tool or drill pipe is prevented from moving due to the friction resulting from the aforementioned contact with the ground.

[0048] In addition, the longitudinal slot provided according to the invention also considerably facilitates the reverse process, i.e. the removal of a drilling tool or drill pipe from the cylindrical pipe. The longitudinal slot enables the drilling tool or drill pipe located in the pipe to make contact with the ground when the attachment, and thus the pipe, is tilted into a horizontal position and lowered to the ground. The pipe can then be pushed or pulled over the drilling tool or drill pipe located therein (by moving the construction machine as described above) until the drilling tool or drill pipe is completely outside the pipe. It is advantageous in this case that the drilling tool or drill pipe is prevented from moving due to the friction resulting from the ground contact while the cylindrical pipe is pushed or pulled relative to the drilling tool or drill pipe located therein.

[0049] When using the attachment to manipulate drilling tools or drill pipes, as described in the preceding paragraphs, the attachment is attached to a mobile construction machine, preferably a wheel loader, so that the attachment can be raised, lowered and tilted forwards (i.e. away from the construction machine) and backwards by up to 90° by means of the construction machine.

[0050] Wheel loaders and other construction machines are typically equipped with lifting frames for attachments that enable the described types of movement. As a result, the attachment according to the invention can be tilted forward, in particular by 90°, by means of a wheel loader (or other construction machine) equipped in this way, in order to position the attachment tube horizontally with the slot facing downwards, or tilted backward by 90° to bring the attachment tube into a vertical position, with the longitudinal slot of the tube then facing forwards. In principle, all movements of the attachment for manipulating drilling tools or drill pipes are performed by means of a wheel loader or other appropriately equipped construction machine.

[0051] According to a preferred embodiment, insertion strips are attached to the pipe on both sides of the slot, in particular welded, at its edges. These strips preferably extend over the entire length of the slot or pipe. These strips serve to facilitate the insertion of drilling tools or drill pipes into the cylindrical pipe. They also act as wear protection for the pipe and as longitudinal stiffening of the open pipe cross-section, which is weakened in the area of ​​the slot.

[0052] Furthermore, it is preferred that the insertion strips have a projection, i.e., extend beyond the open pipe end. This further facilitates the threading of a drilling tool or drill pipe into the cylindrical pipe of the attachment.

[0053] The aforementioned connecting device is arranged on the side of the pipe circumference opposite the slot and is connected to the pipe and / or the base plate. It serves to connect the attachment to a mobile construction vehicle, in particular a wheel loader. Preferably, the connecting device is designed such that it can be connected to the lifting frame of a wheel loader, wherein the lifting frame can in particular also perform a tilting movement of approximately 90°. By tilting the lifting frame forwards by approximately 90°, the attached attachment can be brought into a horizontal position and placed on the ground. By tilting the lifting frame backwards by approximately 90°, the attached attachment can be raised from the horizontal to the vertical (upright) position.

[0054] Preferably, the connecting device comprises a steel plate oriented perpendicularly to the base plate and connected to the base plate, to which mounting strips are attached, by means of which a detachable connection can be established with one of the aforementioned construction machines, in particular with a quick-change device of the lifting frame of a wheel loader. Preferably, the aforementioned steel plate is detachably connected to the base plate, so that the connecting device is interchangeable. This enables adaptation of the attachment to the available construction machines, which may be equipped with different attachment mounts. Alternatively, the steel plate can be connected to the base plate by a welded joint. The support bars of the connecting device are preferably welded to the steel plate.

[0055] According to a further embodiment, forklift pockets are attached to the underside of the base plate of the attachment according to the invention. These allow the attachment to be transported using the pallet forks of a wheel loader or other mobile construction machine.

[0056] Furthermore, the attachment can be equipped with steps and handrails, which serve as climbing aids for drilling personnel (operating personnel) and ensure safe standing, for example, when inserting and securing the bolts on the Kelly box. These steps can be attached to the sides (or both sides) of the attachment, particularly to the aforementioned stiffening plates of the cylindrical tube. The steps can be fixed or, preferably, foldable (e.g., extendable, foldable).

[0057] Furthermore, recesses can be made in the stiffening plates, which can also serve as climbing aids.

[0058] Furthermore, it is advantageous if the attachment has one or more devices for holding or storing fasteners, in particular Kelly pins, and / or one or more magnetic plates for holding fasteners or tools. For this purpose, the attachment can be equipped with one or more magnetic plates for holding a hammer, Kelly pin locks, and the like. Suspension eyes can be attached for the temporary storage of pins.

[0059] The above-mentioned means (steps, handrails, climbing aids, etc.) contribute to reducing the risk of accidents and make work easier.

[0060] The materials suitable for the manufacture of the attachment and its components, particularly steel materials, are known to those skilled in the art. The aforementioned connections are preferably made as welded joints; however, detachable connections, e.g., using screws or bolts, are also possible.

[0061] Furthermore, the invention also extends to the use of an attachment - as described above - for transporting, changing the position or manipulating drilling tools and drill pipes in special civil engineering.

[0062] A further advantageous use of the attachment according to the invention relates to the most effective changing of drilling tools. Since changing drilling tools using the conventional procedure is quite time-consuming and unsafe, this often leads to the drilling tool not being used that is suitable for the respective soil layer. The attachment (manipulator) according to the present invention enables a quick and safe changing of drilling tools, thus facilitating the use of the most suitable drilling tool in each case. This accelerates drilling progress and, moreover, minimizes wear on the drilling tool, thereby saving costs.

[0063] A further advantageous use of the attachment according to the invention relates to the rapid and safe provision of drill pipes for the rotary drilling rig. Since drill pipes can be quickly deposited and re-erected using the attachment according to the invention, there is no need to screw drill pipes into the ground next to the rotary drilling rig. Furthermore, the rotary drilling rig eliminates the need to move the drill pipes back and forth when transporting individual drill pipes from the last drilling point to the next, since the transport of drill pipes away from or to the rotary drilling rig can be carried out using the attachment according to the invention (and a wheel loader or other construction machine).

[0064] The advantages of the present invention are primarily that drilling tools or drill pipes are held securely, particularly during assembly, due to the temporary inclusion in the pipe of an attachment according to the invention and can be transferred from a lying (i.e., substantially horizontal) position to the upright (i.e., substantially vertical) position and vice versa, which also simplifies and accelerates, for example, the changing of drilling tools.

[0065] The attachment can also be advantageously used for dismantling drilling tools or drill pipes from the rotary drilling rig. The cylindrical tube of the attachment is positioned vertically beneath the respective drilling tool or drill pipe, and the drilling tool or drill pipe is then received in the cylindrical tube (by vertically lifting the attachment or by lowering the drilling tool or drill pipe). The drilling tool or drill pipe can then be brought into a horizontal position and placed on the ground by tilting the attachment (e.g., using a wheel loader to which the attachment is attached).

[0066] Unlike the prior art described above, it is not necessary to lift the drilling tools or drill pipes using a suspension system and the drilling rig's auxiliary winch. Since the attachment according to the invention can be moved using a wheel loader (or other construction machine), this enables safe lifting, lowering, tilting, and transport, as well as precise manipulation and positioning of drilling tools and drill pipes.

[0067] The use of the attachment according to the invention for transporting drilling tools and drill pipes leads to increased safety, especially when drilling tools and drill pipes must be transported over uneven construction site terrain. Since the drilling tools and drill pipes are held within the cylindrical tube of the attachment and are thus protected during transport, safe and hazard-free transport is possible, for example, from the storage location to the rotary drilling rig.

[0068] Since transport using the attachment according to the invention takes place in an upright position, this also has the advantage that the load (drilling tool, drill pipe) does not protrude laterally beyond the wheel loader, unlike the conventional horizontal transport using pallet forks. Upright transport is particularly advantageous in tight construction site conditions.

[0069] An additional increase in occupational safety can be achieved through the aforementioned optional features of the attachment according to the invention (climbing aids, steps, handrails, holders for Kelly pins, magnetic plate(s) for tools, etc.). The inconvenient and dangerous use of lean-to ladders can thus be avoided.

[0070] The present invention also provides methods that can be carried out using the attachment according to the invention.

[0071] A method according to the invention for connecting a drilling tool to a drill rod, in particular a Kelly bar, of a rotary drilling rig, using an attachment according to the invention which is attached to a tiltable lifting frame of a mobile construction machine, in particular a wheel loader, comprises the following steps: a) Picking up the drilling tool lying on the ground into the cylindrical tube of the attachment by tilting the attachment into a horizontal position using the lifting frame. The drilling tool is then inserted into the tube through the open end by moving the construction machine, preferably up to the stop (= base plate), with the slot in the tube facing the ground. As described above, this insertion is facilitated by the fact that the drilling tool can touch the ground due to the slot provided according to the invention. b) raising the drilling tool located in the pipe from the horizontal to the upright position by tilting the attachment using the lifting frame; c) if necessary, transporting the attachment to the rotary drilling rig by means of the construction machine; d) Positioning the drilling tool in an upright position under the drill rod, in particular the Kelly bar, and connecting the drilling tool to the drill rod, in particular inserting the Kelly square into the Kelly box of the drilling tool.

[0072] The diameter of the drilling tool is smaller than the width of the slot to prevent the drilling tool from falling out through the slot. After the bolts have been inserted and secured, the drilling tool can be lifted with the Kelly bar and the attachment can be moved away by the construction machine.

[0073] The invention further extends to a method for connecting a drill pipe to a pressure pipe of a rotary drilling rig, using an attachment according to the invention which is attached to a tiltable lifting frame of a mobile construction machine, in particular a wheel loader, the method comprising the following steps: a) Picking up the drill pipe lying on the ground into the pipe of the attachment by tilting the attachment into a horizontal position using the lifting frame. The drill pipe is then inserted through the open pipe end into the cylindrical pipe by means of a driving movement of the construction machine, preferably up to the stop (= base plate), with the slot in the pipe facing the ground. In this case, too, this insertion process is facilitated by the fact that the drill pipe can touch the ground due to the slot provided according to the invention. b) Erecting the drill pipe located in the pipe from the horizontal to the upright position by tilting the attachment using the lifting frame; c) if necessary, transporting the attachment to the rotary drilling rig by means of the construction machine; d) Positioning the drill pipe in an upright position under the pressure pipe and connecting the drill pipe to the pressure pipe.

[0074] The diameter of the drill pipe is smaller than the width of the slot to prevent the drill pipe from falling out through the slot.

[0075] The invention further extends to a method for changing drilling tools of a drill string, in particular a Kelly bar, of a rotary drilling rig, using an attachment according to the invention which is attached to a tiltable lifting frame of a mobile construction machine, in particular a wheel loader, the method comprising the following steps: a) positioning the attachment tilted into the vertical position below a drilling tool to be replaced, which is attached to the drill rod, by means of the construction machine; b) lowering the drill rod, whereby the drilling tool is inserted into the cylindrical tube of the attachment, preferably up to the stop (= base plate); c) Disconnecting the connection between the drill rod and the drilling tool; c) removing the attachment from the rotary drilling rig and transporting it in an upright position to a storage location; d) depositing the drilling tool at the deposit location by tilting the attachment with the drilling tool in the pipe from the upright position to the horizontal position using the tilting mast and depositing it on the ground with the slot of the pipe facing the ground; e) Extraction of the drilling tool from the cylindrical tube by means of a travel movement of the construction machine; f) Connecting a drilling tool to be replaced to the drill rod according to the procedure described above.

[0076] The diameter of the drilling tool is smaller than the width of the slot to prevent the drilling tool from falling out through the slot.

[0077] Furthermore, the present invention comprises a mobile construction machine, in particular a wheel loader, which is equipped with a tiltable lifting frame to which an attachment according to one of claims 1 to 9 is attached.

[0078] As described above, this combination can be used advantageously for transporting, repositioning or manipulating drilling tools and drill pipes in special foundation engineering. Description of the drawings

[0079] The invention is explained below with reference to the drawings Fig. 1 to Fig. 5, Fig. 6A, Fig. 6B and Fig. 6C explains in more detail: Fig. 1 shows an embodiment of the attachment in an upright position (front view). Fig. 2 shows a perspective view of the Fig. 1 illustrated embodiment. Fig. 3 shows the Fig. 1 illustrated embodiment in top view. Fig. 4 shows a side view of the Fig. 1 illustrated embodiment. Fig. Figure 5 is a schematic cross-sectional view of the cylindrical tube of the attachment (without drilling tool or drill pipe). Fig. Figure 6A is a schematic cross-sectional view of the cylindrical tube with auger or drill pipe. Fig. 6B shows Fig. 6A shows the combination of cylindrical tube and auger (or drill pipe) in the horizontal position. Fig. 6C: Similar to 6B; shows the use of the attachment or cylindrical tube to pick up an auger from the ground. Regarding Fig. 1:

[0080] The attachment shown there has a base plate (1) onto which a cylindrical tube (2) is welded vertically, which is open at the top. The tube (2) has a slot (5) on the front side (facing the viewer) that extends the entire length of the tube, i.e., from the base plate (1) to the open end.

[0081] On both sides of the longitudinal slot (5), insertion strips (4) are attached to the pipe (2), simplifying the insertion of a drilling tool (3) or drill pipe into the pipe. In the illustrated embodiment, the insertion strips (4) extend over the entire length of the pipe (2) or the longitudinal slot (5). The insertion strips have a projection (4a) at the upper end of the pipe, which further facilitates threading the drilling tool or drill pipe.

[0082] Inside the cylindrical tube (2) is a drilling tool (3), whose lower end rests on the base plate (1) and whose helix is ​​located almost entirely within the tube. The Kelly box (3a) of the drilling tool (3) protrudes from the top of the open tube end and is no longer enclosed by the tube. In the front view shown, the drilling tool (3) (a drilling auger) housed in the tube is partially visible through the longitudinal slot (5) in the tube (2). Instead of a drilling tool (3), the tube (2) may, for example, contain a drill pipe, as described above.

[0083] On the rear side of the device opposite the slot, a steel plate (6) is welded vertically onto the base plate (1). Mounting bars (7) for attaching the attachment to a construction machine are attached to the steel plate (6) (in Fig. 1 not shown; see Fig. 2 to 4).

[0084] To facilitate loading and unloading of the attachment, paired forklift pockets (8) for holding a pallet fork are attached to the underside of the base plate (1), so that the attachment can be lifted, lowered, tilted or transported using the pallet fork of, for example, a wheel loader.

[0085] Stiffening plates (9) are attached to the two opposite sides of the pipe (2) to stiffen the pipe. The stiffening plates have lateral recesses (11) that serve as climbing aids. Also to increase the rigidity, a stiffening ring (10) is attached to the outside of the upper, open end of the tube (2). This ring leaves the area of ​​the slot (2) free, ie it corresponds to a circular arc (see also Fig. 2 and Fig. 3).

[0086] Furthermore, handrails (13) are attached to the attachment to increase the safety of the drilling personnel when climbing.

[0087] Furthermore, in the upper area of ​​the tube (2) on both sides there are insertion mandrels (15) which serve as intermediate storage for Kelly bolts (16) (see Fig. 2). A magnetic plate (16) is also mounted in the upper section of the tube (2), by means of which the hammer required to drive in the Kelly pin safety device and the Kelly pin safety device itself can be securely held. Regarding Fig. 2:

[0088] This view shows one of the aforementioned connecting device support rails (7), as well as steps or standing surfaces (12) mounted on both sides of the pipe (2), to the right and left of the slot (5), and above the climbing aids (11). These serve as a safe standing place for the drilling personnel while driving in the Kelly pins and attaching the Kelly pin securing device. The steps (12) can be attached, for example, to the stiffening plates (9) and / or the steel plate (6).

[0089] The handrails (13) are mounted above the step (12) in such a way that they enable an operator standing on the step to hold on.

[0090] Preferably - as in Fig. 2 - the mentioned climbing aids (11), steps (12), handrails (13), insertion mandrels (15) and magnetic boards (16) are mounted on opposite sides of the tube (2).

[0091] Fig. 2 further illustrates the position of the Kelly bolts (14) held in insertion mandrels (15), as well as the position of the mentioned magnetic plate (16). Regarding Fig. 3:

[0092] As can be seen in this view, the drilling tool (3) is located inside the pipe (2). Fig. 1 and Fig. As shown in Figure 2, in this example, a drill auger is used as the drilling tool (3). The drill auger has a cylindrical shape in the helix area, which is why the drilling tool appears circular in plan view (see reference symbol (3)). The drill auger is arranged concentrically within the pipe (2), with a gap or play between the inner wall of the pipe and the circular contour of the drilling tool (drill auger), allowing the drilling tool to be moved within the pipe.

[0093] If a drill pipe is inserted into the pipe (2) instead of the Fig. 3, the structure designated by reference numeral (3) corresponds in this case to the cylindrical drill pipe.

[0094] Furthermore, Fig. 3 the receiving strips (7) attached in pairs to the steel plate (6) for attaching the attachment to a construction machine, in particular to the lifting frame of a wheel loader. Regarding Fig. 4:

[0095] This side view shows further details of the connecting device (steel plate (6), mounting rails (7)). The mounting rails are designed so that the attachment can be attached to the quick coupler of a standard bike rack. Regarding Fig. 5:

[0096] This schematic cross-sectional view shows the cylindrical tube (2) of an attachment according to the invention. The plan view or cross-section of the tube (2) corresponds to an arc of a circle around the center point M (through which the axis of the cylindrical tube runs).

[0097] The width b of the slot (5) corresponds to a chord S with the central angle α. The central angle α is the angle formed between the radii (or sides) R 1 and R 2 which extend from the center M to the edges (2', 2'') of the slot (5). In the Fig. In the example shown in Figure 5, the central angle α is approximately 110 degrees. Regarding Fig. 6A:

[0098] This illustration shows a cylindrical tube (2) as in Fig. 5, but with a substantially concentrically arranged drilling tool (3) or drill pipe therein. The slot (5) has a width b which is smaller than the diameter of the drilling tool or drill pipe. The central angle α of the slot (5) is Fig. 6A example shown is approximately 90 degrees.

[0099] In the Fig. In the illustration shown in Figure 6A, the cylindrical tube (2) with the drilling tool (3) or drill pipe inserted therein is in the vertically upright position, with the slot (5) being at the front (relative to the forward direction of travel of a wheel loader to which the attachment is attached). Regarding Fig. 6B:

[0100] This representation corresponds Fig. 6A, wherein the pipe (2) has been tilted into the horizontal position as provided for in the uses and methods described above in order to deposit the drilling tool (3) or drill pipe on the ground (20).

[0101] In this horizontal position, the slot (5) of the pipe (2) is located on the underside of the pipe or attachment, i.e., facing the underlying floor (20). In the cross-sectional view, the distance between the edges (2', 2'') of the slot corresponds to the slot width.

[0102] Since the width b of the slot (5) is smaller than the diameter of the drilling tool (3) or drill pipe, the drilling tool or drill pipe is prevented from falling out through the slot when the attachment and thus the cylindrical pipe (2) is moved from the vertical position to the horizontal position (as in Fig. 6B) is tilted.

[0103] As in Fig. As shown in Figure 6B, the selected width (b) of the slot (5) causes the drilling tool (3) or drill pipe located in the pipe (2) to partially protrude downwards from the slot due to its weight and touch the ground (20) after the pipe has been tilted into the horizontal position and lowered towards the ground. The drilling tool (3) or drill pipe can slide along the edges (2', 2'') of the slot (5), or along any insertion strips (4) attached thereto, when the cylindrical pipe (2) is displaced longitudinally (axially) (e.g., by means of a wheel loader to which the attachment is mounted). Regarding Fig. 6C:

[0104] This on Fig.The illustration based on Figure 6C shows the use of an attachment according to the invention to pick up a drilling tool (3) from the ground (20) by means of its cylindrical tube (2), which has partially sunk into the ground (20) due to its weight and the soil conditions. For this purpose, the tube is pushed longitudinally (axially) over the drilling tool (3). List of reference symbols 1 base plate 2 cylindrical tube 2' edge of the pipe at the slot (5) 2'' edge of the pipe at the slot (5) 3 drilling tool 3a Kelly Box 4 insertion strips 4a Overhang of the insertion strips 5 slot 6 steel plate 7 mounting strips 8 forklift pockets 9 stiffening plates 10 stiffening ring 11 recesses (climbing aids) 12 steps 13 handrails 14 Kelly bolts 15 insertion mandrels 16 magnetic plate 20 floor b Width of the slot d inner diameter of the pipe M Center of the pipe R 1 ,R 2 Radii S chord (corresponds to slot width b).

Claims

[1] An attachment for a mobile construction machine, in particular a wheel loader, for transporting and changing the position of drilling tools and drill pipes, comprising a base plate (1), a cylindrical, open pipe (2) arranged vertically on the base plate and connected thereto for receiving a drilling tool (3) or drill pipe, and a connecting device (6, 7) for connecting the attachment to a mobile construction machine, wherein - the cylindrical tube (2) is connected to the base plate (1) at one of the two tube ends, so that the latter partially or completely closes the tube end, and the opposite tube end is open, - the inner diameter (d) of the cylindrical tube (2) is selected so that the drilling tool (3) or drill pipe can be inserted through the open pipe end, - the cylindrical tube (2) has a slot (5) extending in its longitudinal direction, the width (b) of which is smaller than the diameter of the drilling tool (3) or drill pipe, - the connecting device (6, 7) is arranged on the side of the pipe circumference opposite the slot and is connected to the pipe (2) and / or the base plate (1). [2] Attachment according to claim 1, characterized by that the slot width (b) is a maximum of 90%, preferably a maximum of 85%, of the diameter of the drilling tool or drill pipe. [3] Attachment according to claim 1 or 2, characterized by that the width b of the slot (5) corresponds to a chord of a circle with the central angle α, based on the circular cross-section of the cylindrical tube (2), and the central angle α is 40° to 140°, preferably 60° to 120°, in particular 80° to 110°. [4] Attachment according to one of claims 1 to 3, characterized bythat on both sides of the slot (5) on the edges of the tube (2) insertion strips (4) are attached, which preferably extend over the entire length of the slot (5). [5] Attachment according to one of claims 1 to 4, characterized by that the connecting device has a steel plate (6) which is aligned perpendicularly to the base plate and connected to the base plate, to which receiving strips (7) are attached, by means of which a detachable connection can be established with a construction machine, in particular with a quick-change device of the lifting frame of a wheel loader. [6] Attachment according to one of claims 1 to 5, characterized by that forklift pockets (8) are attached to the underside of the base plate. [7] Attachment according to one of the preceding claims, characterized bythat the cylindrical tube (2) has on its outside one, two or more laterally attached stiffening plates (9), preferably in pairs arranged opposite one another, and / or that a stiffening ring (10) is attached to the open tube end of the tube (2). [8] Attachment according to one of the preceding claims, characterized by that it has steps (12) serving as climbing aids, as well as optional handrails (13). [9] Attachment according to one of the preceding claims, characterized by that it has one or more devices (15) for holding or storing connecting means, in particular Kelly bolts (14), and / or one or more magnetic plates (16) for holding connecting means or tools. [10] Mobile construction machine, in particular a wheel loader, with a tiltable lifting frame and an attachment mounted thereon according to one of claims 1 to 9.

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