DE1909622A1 - Device for overlay, anchor hole and / or underwater drilling - Google Patents

Description

19Ö9B22 ^{F 1350}

Gebr. Böhler & Co. Aktiengesellschaft in Vienna

Device for superimposing »-, anchor hole and / or

Underwater drilling

The invention relates to a device for superimposing Anchor hole »and / or underwater drilling, which has an internal and has a ring bit.

Devices of the type mentioned are known, where a machine, preferably a hammer drill is provided on the one hand a rotating movement causes and, on the other hand, also blows. Turning movements and blows are made by the machine just mentioned by a so-called connecting piece, with which both the inside drill rods and the outer drill rods rigidly connected is transferred to these two linkages .. As a result, are the number of strokes of the inner drill bit attached to the inner drill rod and that attached to the outer drill rod Ring drill bit the same and, moreover, the ratio of the impact energies transmitted to the inner and ring drill bit do not set in the above known devices. These two circumstances have the disadvantage that in view of the overlay and anchor hole drilling required large borehole diameter di · mentioned above Driving machine relatively very large and difficult to see to be carried out in order to achieve a reasonably satisfactory Drilling performance to be able to achieve.

The invention is based on the object of the above Avoid disadvantage and use a sinker drill too

create, in which it is possible to determine the ratio of the internal and ring bit (outer bit) transmitted impact energies to be precisely defined from the outset «According to the invention, this becomes achieved in a device of the type mentioned in that two striking mechanisms are provided, where daa ' Impact mechanism against the inner drill bit and the other impact mechanism hits against the ring drill bit that one of the drill rods

s hearing part, preferably designed as a screw-in piece

has keyways on its inside into which the lugs provided on the ring drill bit engage and the ring drill bit: also provided with keyways on the inside: is, in the on a preferred, £ wise screwed stub insert existing noses fen «

Go further details of the device according to the invention from the following description of an exemplary embodiment which is shown schematically in the drawing. "

Show it:

1 'shows an embodiment of the device according to the invention

in view,
2 shows the hammer mechanism acting on the inner drill bit 23

in longitudinal section a - b and on a larger scale, 3 shows the hammer mechanism 6 acting on the ring drill bit 20

including the two drill bits 20 and 23, also in the Längfe cut a - b ubd on a larger scale

The percussion pistons 2 and 7 of the two percussion mechanisms 1 and 6 are arranged concentrically to the drilling axis a - b, the percussion mechanism 6 acting on the ring drill bit 20 being arranged in front of the hammer mechanism 1 acting on the inner drill bit 2.3 y when viewed from the two drill bits 20 and 23 . Both locking pistons 2 and 7 are located in the same cylinder 5. The percussion piston 2 strikes with its shaft 2 'against the plug-in stub 2k, which is preferably screwed directly to the inner drill bit 23. On the other hand suggests that the Schlagkolbeii 7 (dureh the concentric bore of the λ Einsteckstummel Zh hindurch-

9 0 9 8 3 8/0 2 0 1 '

goes) directly to the ring drill bit 20. The air is supplied to the two percussion pistons 2 and 7 via one of the known valve gate controls to which the slide 13 belongs the holes 12 * supplied in the control part 12 through the slide 13 alternately through the channel 1 k into the front cylinder chamber 3 or 8 and through the channel 15 or

16 in the rear cylinder space ^ or 9 of the striking mechanism 1 or 6, while the exhaust air through the two exhaust ducts

17 and 18 and the bores 21 present in the outer drill bit 20 flows to the bottom of the borehole 22 and is used as flushing agent. The two drill bits 20 and 23 are jointly driven by a pneumatically or hydraulically operated rotating mechanism (not shown). The rotary movement is transmitted via the drill pipe (extension pipe) 10, the intermediate piece 11, the cylinder 5 and the screw-in piece 19 (which parts are screwed together). The screw-in piece 19 has keyways 19 'on its inside, into which the lugs 20' provided on the ring drill bit 20 engage. As a result, the ring drill bit 20 rotates with the screw-in piece 19. The ring-borehole crown 20 is also provided on the inside with keyways 20 **, into which on the plug-in stuflUB ·! 2k existing noses 2k * intervene. As a result, the plug-in barrel Zk rigidly connected (screwed) to the inner drill bit 23 rotates with the ring drill bit 20. Both drill bits 20 and 23 thus perform a simultaneous percussive and rotating movement, as in the previously described devices. The ring drill bit 20 is provided on one side in its middle length area with an elongated recess 25, dn-which a fixed in the screw-in piece 19, transversely to the Bphraehs.e _; . .. a - b arranged cylindrical pin 26 engaging-tr; and · as a result, falling out of the ring bit 20 from demEinschrauhstück 19 -y erhindert ..- .Difr dissipation, the drill material! "; ^ Cuttings) is made from the following: the> between the drill rod (which consists of the screw-in piece 19, the cylinder 5 and intermediate pieces 11 and extension tubes 10

909838/0201

- h «" F 1350 a

stands) and borehole wall 27 existing Ringrausa 28. Let it be notes that the two of them each on one of the two drill bits 20 and 23 acting hammer mechanisms 1 and 6 represent countersinking hammers « In overlay drilling and especially in underwater drilling, with the ring drill bit on solid (grown) stone, comes, it is advantageous to insert swisshen 24 and Innenbohrkron © 23 one or more (not shown) threaded extension rods at their ends.

watch. .

It should be mentioned that in the device according to the invention pneumatically or hydraulically operated hammer mechanisms © and pneumatically, hydraulically or otherwise driven rotating mechanisms come into question. -. .. ^ ₁ , ..

It should be pointed out that, in addition to the content of the patent claims, all of the claims described in the above Embodiment contained details essential to the invention. are·

In contrast to the known devices for superimposing, Anchor hole and / or underwater drilling is the case with the one according to the invention Device possible, the ratio of the impact energies transmitted to the inner and ring bit from the start to be precisely defined. As a result, the invention offers Device compared to the known devices borrowed the daring The advantage is that, under otherwise identical conditions, you can achieve significantly greater drilling capacities with lower drive lines can be achieved. Another advantage of the device according to the invention is that the 'actuation' required striking mechanism «relatively much smaller and can be carried out more easily than in the aforementioned known devices.

9098 30/0201

Claims (2)

Claim 1, apparatus for superimposing v, Anfcerloch- "and / or underwater drilling, di · an inner and an ring bit" up has, characterized g ο k β η η ζ calibration η © _t}) that two Sehlagwerk are provided ·, wherein striking a percussion (i) against the Innenbohrkrone (23) and the other striking mechanism (6) against the ring bit (2O) that a belonging to the drill pipe, preferably designed as a screw-in piece (19) formed part on its inner side splines (19 *) has, engage in the lugs (20 ') provided on the ring bit (20) and the ring bit (2θ) is also provided on the inside with keyways (20''), into which on a rigidly connected to the inner bit (23), preferably screwed stub stub (Zk) present noses' (2if ^f ) engage 2. Device according to claim 1, characterized in that that the percussion piston (7) interacts with the ring drill bit (20) Striking mechanism (6) directly to the same s strikes. 3. Device according to claim 1, characterized in that both percussion ^{pistons (2, 7) are arranged in the} same cylinder (5) H. Device according to claim 1, characterized in that the exhaust ducts (18, 21 ") from the cylinder chamber of the hammer mechanism (6) striking the ring drill bit (20) through the screw-in piece (19) and the ring drill bit (20) on the one hand and from the cylinder chamber the against the inner drill bit (23) striking hammer mechanism; (t) through the Eiüsteekstuma} ®! (B ^) other side to the bottom of the hole i (.2.-2 ·) lead ««, G β br, B ö h 1 er & G a Aktiengesellschaft f patent office] Le er.se it e