EP0979920A2 - Drill apparatus with twin impact system - Google Patents

Abstract

The outer tube (2) can be activated by a striker part (8) displaceable longitudinally and arranged over the inner tube (3). The insert end (5) extending on both sides over the rotary mechanism has on the rotary striking mechanism side a compensation ring (10) which has a hardness below that of the tube material and the striker part. The compensation ring has a curved surface on both sides, corresponding to the abutting end piece (11) of the insert end. In the housing (9) on the curved surface of the compensation ring lubricating holes (12) are provided.

Description

The invention relates to a drilling device with outer tubes screwed together and screwed together inner tubes, which via a slewing gear or a Rotary striking mechanism can be driven, the outer tube being connected to the rotating mechanism on both sides Outstanding plug-in end can be coupled and via an assigned to the inner tube and designed to be acted upon by this striking member which is arranged to be displaceable in the longitudinal direction is.

Such drilling devices are used in special civil engineering, in stone and Earth and used in the construction industry. They are used in more or less tough Mountains drill holes in which an anchor is then inserted and fixed is, for example, in this way the mountains or the building ground to solidify. These drilling jigs come with an outer tubing string and a Inner tube string used, the individual outer tubes and inner tubes each with Thread equipped and therefore must be screwed together. While through the hollow inner tube of flushing liquid from a flushing head to the drill bits is carried out, the drilling fluid enriched with cuttings is then over the space raised between the outer tube and inner tube again to day. The inner tube is usually acted on by a rotary impact mechanism, while the outer tube is only driven by a slewing gear. This can be particularly the case with hard rock lead to problems. For this reason, according to DE-PS 35 03 893, that the rotary impact drive for the inner linkage is used simultaneously to to act accordingly on the rear end of the outer linkage. For this the inner rod is equipped with a ring collar, so that at the same time Impact the outer linkage with blows. The striking mechanism can with the ring collar be retracted longitudinally to the drilling device in this way to be able to operate only with a rotating outer tube. Due to existing Problems are provided after training according to DE-PS 35 03 893, the To provide the end face of the ring collar and the end of the outer tube with teeth, in order to achieve a rotationally fixed coupling of the outer linkage and inner linkage. But this intermeshing only led to further problems and such high wear of the ring collar and possibly also the end piece of the outer tube, so that a longer operation of such drilling devices is not possible. It must be taken into account that the one hitting the end of the outer tube Ring ring also turned together with the inner tube becomes. The two slewing gears are forcibly interconnected via the gearing connected.

The invention is therefore based on the object of designing a drilling device in such a way that that the outer tube with the same device can rotate or can be impacted and operated.

The object is achieved according to the invention in that the insertion end A compensating ring is assigned on the rotary impact mechanism side, one under that of the pipe material or the hardness lying hardness and / or the adjacent end piece adapted to the insertion end and occurring forces compensating shape and / or Surface.

The striking part means the ring wreath that is used in the DE-PS 35 03 893 applied to the end of the insertion end. With the present solution is now between the two striking parts, d. H. the tail of the Inserting, and the striking part set a compensation ring, both with respect to the rotating striking part as well as the striking striking part ensures a balance, so that neither the striking part nor the insertion end is overloaded or damaged prematurely can be. By the compensation ring itself and its skillful training and the choice of material is not only achieved, if at all, by the compensating ring wears out, but such wear does not usually occur because the compensation ring for a uniform transmission of the occurring forces, d. H. Beats, worry. This is because of the special shape, i. H. the Surface or the entire shape of the compensation ring as well as by the material, so that separate maintenance is generally not necessary, regardless of whether the drilling device with a rotating or rotating and striking outer tube is operated. But even if due to some extreme stress an overload occurs, it is only necessary to use the compensation ring as replace them if the damage should show up.

In an expedient embodiment of the invention it is provided that the Compensating ring on one side a spatially curved, with the adjacent end piece of the Has a corresponding surface. Centering is thus carried out the compensation ring on the one hand and the insertion end on the other hand, without it precise guidance of these two parts is required. At the same time, such a compensation ring ensures and an appropriately designed insertion end so that they may also Forces not exactly centric but exactly centric on or in the Outer tube to be forwarded. This is the mentioned backup of the compensation designed compensation ring ensured.

The invention provides that the compensating ring is particularly expedient a spatially curved on both sides, with the adjacent end piece of the insertion end has corresponding surface, it being understood that the insertion end on the one hand and the striking part on the other hand also a correspondingly curved surface have, which are correspondingly reversed. The balance ring lies preferably with its curved surface or rather with its curved surfaces on the one hand in the correspondingly troughed insertion end or in the trough part executed with a trough. The description already shows that in this way the compensating ring is always held in an optimal position can be without any other control mechanisms or Control mechanisms are required.

The compensation ring should be assigned to the insertion end, which is the advantage has that when pulling back the striking mechanism with the striking part as a loose component trained compensation ring can remain at the insertion end. To slip here Canting or similar To prevent the invention provides that the insertion end enclosing the compensating ring from a housing carrying the slewing gear motors is trained. The housing with appropriate is particularly expedient and simple Provide projections that fix the correspondingly large compensating ring, while the striking part has a correspondingly smaller diameter and therefore can be inserted into the housing so that it is in rotary operation rests on the compensation ring or the corresponding surface.

It has already been pointed out earlier that the described Rotary impact operation for the outer tube or the inner tube or the rotary impact mechanism assigned impact part is rotated at the same time, because it is connected to the inner tube is or even forms a structural unit with this. To here now on the otherwise smooth surface to avoid damage that would otherwise be caused by the drilling water can occur is provided according to the invention that in the housing on the curved Surface of the compensating ring directed lubrication holes are provided. These lubrication holes can either at regular intervals, for example at the start of operations, or depending on requirements, grease or similar be introduced so as to slide the two surfaces of the compensating ring together on the insertion end or the striking part.

In order to be able to absorb the grease that is pushed aside when and in particular to make the inner tube simple and expedient during assembly To be able to push the compensation ring through, it is provided that the compensation ring has a central bore lying above the diameter of the inner tube. This center hole can even be suitably provided with slopes, so one Avoid damage in this area by hitting the striking part. Accordingly, the edge is preferably also in the area of the striking part striking beveled, while on the opposite side of the center hole appropriate slope may be missing.

On the one hand in order to properly guide the compensating ring in the housing enable and on the other hand to finally push back and forth to the end area the compensation ring on the surfaces of the insertion end and the striking part enable, it is provided that the outer edges of the compensating ring are rounded are trained. The result is a rounded all around with respect to the edges Compensating ring, which is therefore appropriate between the surfaces of the insertion end or the impact part can be stored and influenced well.

The striking part is in principle part of the inner tube, is accordingly influenced by the rotary impact mechanism and can impact energy on the Pass on the outer linkage. To make retrofitting easier and also for installation To optimize, the invention provides that the striking part is designed as a striking sleeve is, which is detachably connected to the insertion end of the rotary impact mechanism. This The inserting end has corresponding threads, so that the interposed impact sleeve can be replaced if necessary, so that the rotary impact mechanism and the slewing gear are closer together, if only the outer tube is rotated. Fast conversions are possible in this way, in particular, however, the impact sleeve can also be replaced once if necessary, can be replaced by a larger or smaller one, or simply replaced.

The compensating ring is acted upon by the impact sleeve, the corresponding Forces can be optimally transmitted if, according to the invention Compensating ring one corresponding to the head of the impact sleeve or the insertion end, preferably has a larger outer diameter. The bigger one Diameter is advantageous if the compensation ring in the housing by means of trained lugs or projections should also be fixed; otherwise one would the same size compensating ring is sufficient.

The slewing gear and the rotary impact mechanism are moved together in the longitudinal direction, so the connected outer and inner tube with the respective strand to slide together into the borehole or rather to drive. To now too To enable separate operation, the invention provides that the impact sleeve together with the rotary hammer mechanism in the longitudinal direction regardless of the rotary mechanism of the outer tube is slidable. The rotary hammer mechanism with the Impact sleeve is thus pulled off the outer tube, so that it then only rotates is acted upon, while the inner tube continues to act rotationally to ensure the necessary drilling progress. Because the outer tube but only has to cut a relatively limited thick coat is enough for softer ones Mountains a rotating load, so that ultimately to protect the boom then the striker sleeve is removed from the compensating ring and the insertion end can.

Injuries to the drilling team can be avoided by using the striking sleeve shaped like a dog bone and equipped with a funnel-shaped protective jacket is fixed to the end facing away from the compensating ring and the housing is formed with covering in the area of the compensating ring at a distance. Such a Protective jacket expediently consists of flexible material, for example Hard rubber or plastic. It covers the striking area, i.e. H. the area where the Impact sleeve hits the compensating ring. Is the impact sleeve from the compensating ring deducted, a correspondingly "shorter" design of the protective jacket is sufficient so that this expediently fixed on the inner tube or more precisely on the impact sleeve and moves with it. The impact sleeve is on the compensating ring and in this way influences the outer linkage or the insertion end, so the protective jacket is close to the corresponding projection of the housing, so that even with careless handling, the drilling team cannot endanger themselves or is not at risk. If necessary, for example also with a corresponding check the impact sleeve, this protective jacket can be removed because it is expedient only attached to the dog-bone shaped sleeve via a kind of press ring is.

It was pointed out earlier that the balance ring both with regard to the overall shape and also with regard to the material, it is designed such that it can "act" as a compensation ring. The material is adjusted so that it is the one hand Blows the impact sleeve securely on the insertion end and thus also the outer tube transmits, but on the other hand protects this plug-in end in such a way that it is affected by the blows cannot be damaged. Both the shape and the material continue to provide to ensure that strokes that do not hit the center are evened out so far, that there can be no damage to the corresponding components, whereby the rotating impact sleeve is almost centered by the compensating ring. It can this compensating ring can be bent or curved outwards as well as after Inside, only the surfaces of the compensating ring and the insert ring or the Impact sleeve have correspondingly corresponding shapes. In addition, the Invention then before that the compensating ring from one of the material of the insertion end and the impact sleeve in terms of hardness as well as thermal conductivity and Material of similar values is made, the toughness is preferred what is higher is that the task assigned to them is surely fulfilled.

A material that is particularly suitable for use is bronze, whereby it is is preferably forged bronze. This forged bronze makes one Compensation ring with optimal properties. Both in terms of hardness and toughness as well as other properties, it can be the one between the impact sleeve and the insertion end absorb occurring forces without causing damage to it.

The invention is particularly characterized in that a drilling device is created, which expediently both an operation with rotating outer linkage such as a rotating striking outer linkage. This ensures Rotary impact mechanism of the inner rod or inner tube, as already known, for that the outer tube is also commissioned at the same time. Between the individual Components, d. H. between the striker sleeve on the one hand and the end of the insertion end and thus the outer tube, a compensation ring is set, which is in every respect for balances and at the same time ensures that those coming from the rotary impact mechanism Impacts can be safely transmitted to the outer tube if necessary. The balance ring further ensures that both with regard to the heat as well as the incident Energy overloads of the insertion end, in particular also of the impact sleeve cannot occur. Forced centering and safe transfer the forces are secured by the special shape of the balancing ring. Seen overall, this creates a drilling device that has a long service life can be achieved and advantageously such continuous operation allows if with the help of such a drilling device holes through very hard rock should be driven, because the outer tube now also strikes in the long run can be applied and operated.

Fig. 1

eine Gesamtansicht einer Bohrvorrichtung mit Doppelschlagwerk in Seitenansicht,

Fig. 2

einen Ausschnitt im Bereich des Ausgleichsringes und

Fig. 3

einen Ausgleichsring im Schnitt.

Further details and advantages of the subject matter of the invention emerge from the following description of the associated drawing, in which a preferred exemplary embodiment is shown with the necessary details and individual parts. Show it:

Fig. 1

an overall view of a drilling device with double impact mechanism in side view,

Fig. 2

a cutout in the area of the compensation ring and

Fig. 3

a compensation ring in the cut.

1 shows a side view of a drilling device 1 for double rods. The Outer tube is labeled 2, the inner tube, which is smaller in diameter, is labeled 3. While the outer tube 2 is rotated via the rotating mechanism 4, here on the slewing motors ensure that details are not shown 6 of the rotary impact mechanism 7 together with the impact device for ensuring that the inner tube 3 is applied in a rotational manner.

Fig. 1 actually shows the end of the outer tube 2 forming insertion end 5, the is equipped at the end with a double thread 14.

The slewing gear 4 and the rotary striking mechanism 7 can be together on one here only indicated slides are moved in the longitudinal direction so as to ensure that the entire drill string is driven into the mountains or into the construction site. The sledge is divided into two. The parts are connected via a hydraulic cylinder, to pull the punch mechanism away from the slewing gear.

If the outer tube 2 or the insertion end 5 is not only rotating at the same time Be applied via the slewing gear 4, but also what, for example is required if the double rod is drilled into the mountain or rock becomes. Should now due to increasing hardness of the rock or the mountains too the striking part 8 can be activated to the outer tube 2 not only via the rotating mechanism 4, but also to influence the striking part 8 and thus striking, it will Impact part 8 pushed towards the housing 9 over the hydraulic cylinder and so far pushed until it hits the compensation ring 10 only indicated here. Then is also impact energy on the inner rod or better the inner tube 3 at the same time transferred to the outer tube 2. Further details will be explained with reference to FIG. 2.

Similar to the rotating mechanism 4, there is also an insertion end in the rotary hammer mechanism 7 16, that is, a partial pipe that does not have the slewing motors 6 ' further designated beating part is influenced. The corresponding forces will Transfer directly from the insertion end 16 to the inner tube 3. 1 is also shown the flushing head 13, via which the flushing agent flows into the inner channel 20 of the inner tube 3 is introduced, even when the inner tube 3 is rotating.

Fig. 2 shows again the flushing head 13, which sits on the inner tube 3, and the striking part 8, which is designed here as a striking sleeve 15. This striker sleeve 15 acts via the compensating ring 10 on the end piece 11 of the insertion end 5 and thus on the outer tube 2. The inner tube 3 has a thread, not shown here screwed to the striker sleeve 15. The head 17 of the striker sleeve 15 acts directly onto the compensating ring 10, the rotating movement of the impact sleeve 15 does not affect the compensation ring 10, especially since Lubrication holes 12 pressed into the area of the compensating ring 10 grease can be.

The inner channel 20 can be seen, through which the detergent does not flow in the direction here shown drill bit is promoted.

The head 17 of the striker sleeve 15 and the end portion of the housing 19 with the appropriately mounted compensation ring 10 are covered by a protective jacket 18 and secured, the end 19 of the impact sleeve facing away from the compensating ring 10 15 is set, so that it back and forth together with the striker sleeve 15 pushes, but always ensures that especially when the field operation is activated the area of the compensating ring 10 is covered.

3 shows a compensating ring 10 in section, the surfaces 21, 22 run straight here on both sides of the compensating ring 10. According to the explanations in the description these surfaces 21, 22 are preferably spatially curved trained to include a self-centering of the striker sleeve 15 when Impact operation and a large surface (contact surface) to achieve.

The central bore 23 is larger than the outer diameter of the inner tube 3, which is also clear from FIG. 2, so that an insertion of the inner tube is facilitated is, but at the same time an influence on the compensating ring 10 by the inner tube or vice versa is excluded.

The outer edges 24, 25 are rounded, as shown in FIG. 3, and also the inner edges 26 can have corresponding roundings or bevels.

The compensation ring 10 consists of appropriately matched tough material, the surfaces 21, 22 can also be smoothed to the extent that additionally with or, if necessary, even without lubricant, always smooth operation rotating impact sleeve 15 is possible. It is conceivable that the correspondingly facing surface of the striker sleeve 15 is smoothed, and also the corresponding one Surface of the insertion end 5.

All of the above-mentioned features, including those that can only be taken from the drawings, alone and in combination are regarded as essential to the invention.

Claims (14)

Drilling device with outer tubes (2) screwed together and inner tubes (3) screwed together, which can be driven via a rotating mechanism (4) or a rotary impact mechanism (7), the outer tube (2) being connected to an insertion end (2) which projects beyond the rotating mechanism (4). 5) can be coupled and formed via an impact part (8) assigned to the inner tube (3) and displaceable with it in the longitudinal direction,
characterized,
that the insertion end (5) on the rotary impact mechanism side is assigned a compensating ring (10) which is adapted to a hardness below that of the tube material or the striking part (8) and / or an adjoining end piece (11) of the insertion end (5) and compensates for any forces that occur Has shape and / or surface (21; 22). Drilling device according to claim 1,
characterized,
that the compensating ring (10) has on one side a spatially curved surface (21) corresponding to the adjoining end piece (11) of the insertion end (5). Drilling device according to claim 1,
characterized,
that the compensating ring (10) has on both sides a spatially curved surface (21; 22) corresponding to the adjoining end piece (11) of the insertion end (5). Drilling device according to one of the preceding claims,
characterized,
that the insertion end (5) of a housing (9) carrying the slewing gear motors (6) is designed to enclose the compensating ring (10). Drilling device according to one of the preceding claims,
characterized,
that lubrication bores (12) are provided in the housing (9) and are directed towards the curved surface (21, 22) of the compensating ring (10). Drilling device according to one of the preceding claims,
characterized,
that the compensating ring (10) has a central bore (23) lying above the diameter of the inner tube (3). Drilling device according to one of the preceding claims,
characterized,
that the outer edges (24, 25) of the compensating ring (10) are rounded. Drilling device according to one of the preceding claims,
characterized,
that the striking part (8) is designed as a striking sleeve (15) which is detachably connected to the insertion end (16) of the rotary impact mechanism (7). Drilling device according to one of the preceding claims,
characterized,
that the compensating ring (10) preferably has a large outer diameter that corresponds to the head (17) of the impact sleeve (15) or the insertion end (5). Drilling device according to one of the preceding claims,
characterized,
that the percussion sleeve (15) is designed to be displaceable together with the rotary impact mechanism (7) in the longitudinal direction thereof, independently of the rotary mechanism (4) of the outer tube (2). Drilling device according to one of the preceding claims,
characterized,
that the striking sleeve (15) is shaped like a dog's bone and is equipped with a funnel-shaped protective jacket (18) which is fixed at the end (19) facing away from the compensating ring and the housing (9) in the region of the compensating ring (10) is formed with a covering at a distance. Drilling device according to one of the preceding claims,
characterized,
that the compensating ring (10) is made of a material which differs from the material of the insertion end (5) and the impact sleeve (15) both with regard to hardness and thermal conductivity and similar values, the toughness preferably being higher. Drilling device according to one of the preceding claims,
characterized,
that the compensation ring (10) is made of bronze. Drilling device according to one of the preceding claims,
characterized,
that the compensating ring (10) consists of bronze, which is forged to improve, preferably the toughness.

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