EP0906811B1 - Bohrhammer - Google Patents
Bohrhammer Download PDFInfo
- Publication number
- EP0906811B1 EP0906811B1 EP97810731A EP97810731A EP0906811B1 EP 0906811 B1 EP0906811 B1 EP 0906811B1 EP 97810731 A EP97810731 A EP 97810731A EP 97810731 A EP97810731 A EP 97810731A EP 0906811 B1 EP0906811 B1 EP 0906811B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- motor
- hammer drill
- impact tool
- throttle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 7
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000005553 drilling Methods 0.000 description 10
- 239000011435 rock Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000035559 beat frequency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B6/00—Drives for drilling with combined rotary and percussive action
- E21B6/06—Drives for drilling with combined rotary and percussive action the rotation being intermittent, e.g. obtained by ratchet device
- E21B6/08—Separate drives for percussion and rotation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
- B25D16/006—Mode changers; Mechanisms connected thereto
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
- E21B44/02—Automatic control of the tool feed
- E21B44/06—Automatic control of the tool feed in response to the flow or pressure of the motive fluid of the drive
Definitions
- a hammer drill according to the preamble of claim 1 is known from the US-A-5 415 240 is known.
- the turning mechanism of this hammer is made by driven a rotary motor.
- the striking mechanism is operated by a rotary valve controlled via a gear connection from the rotary motor is driven.
- This has the advantage that the beat frequency is proportional to the speed of the rotary motor and that that Hammer mechanism stops automatically if the drill steel gets stuck. This can save a lot of time and drilling equipment.
- This hammer drill has therefore proven itself very well. However, he did a somewhat complex construction.
- EP-A-145701 describes a further hammer drill according to the preamble of claim 1 described.
- a pilot operated valve is arranged in the feed line to the striking mechanism.
- the food pressure to the rotary motor is the pilot pressure of the pilot valve. If the drill steel gets stuck in the borehole, the Speed of the rotary motor towards zero. This increases the Feed pressure to the rotary motor so that the pilot valve feeds to the striking mechanism stops.
- This solution requires a predetermined one Feed pressure to the rotary motor. Therefore this pressure cannot can be adapted to different rock formations. This The hammer drill is therefore relatively inflexible in use.
- the present invention has for its object a To further develop hammer drills of the type mentioned at the outset, that it is simpler than the US-A-5 hammer drill 415 240 while maintaining its advantages and being flexible is in use. This task is characterized by the Features of claim 1 solved.
- Figure 1 shows a hydraulic diagram for a hammer drill 9.
- Der Hammer drill 9 has a housing, not shown, in which a Adapter is reciprocally and rotatably mounted. On his the adapter has a front end e.g. an external thread for connection of the drilling steel. The adapter is via a gear connection connected to a rotary motor 10. As far as corresponds the hammer of the representation according to FIG. 1 of US Pat. No. 5,415,240.
- a striking mechanism 11 with a cylinder is coaxial with the adapter 12 guided pistons 13 and a piston rod 14 are arranged.
- the end face of the rod 14 strikes against the rear end of the adapter.
- the piston surface 15 on the rod side the supply pressure is constantly applied.
- the opposite Surface 16 is alternated via a hammer mechanism valve 17 with feed pressure from the feed line 18 and with the return pressure connected in the return line 19.
- Via pilot lines 20, 21, each in the cylinder space adjacent to an end position of the piston 13 open the valve spool of the valve 17 driven alternately in the two switch positions.
- On the feed line 18 and the return line 19 are each a pressure accumulator 22, 23 connected.
- the hammer 9 is connected to one via four pressure lines 30 to 33 Control station 34 connected.
- the control station 34 has separate connections 35, 36 for the adjustable feed pressure to the rotary motor 10 and to the striking mechanism 11.
- the return of the slewing gear and striking mechanism can be either a common or two separate connectors 37, 38 have.
- the rotary motor 10 is operated via a three-position four-way valve 39 controlled so that the motor 10 rotate in both directions of rotation can.
- One direction of rotation is used for drilling, the other for Unscrew the drill pipe.
- the line 30 with Pressure is applied.
- adjustable Throttle 40 installed and a parallel to it Check valve 41, which opens in the return direction. With The flow rate for the two can be set in the restrictors 40 Set directions of rotation separately.
- Another adjustable throttle 42 is used in connection 37.
- the feed pressure to the striking mechanism 11 is operated manually Two-position valve 46 controlled.
- a pilot-controlled two-way valve 47 In series with this valve 46 is a pilot-controlled two-way valve 47 and in parallel for this purpose, a manually controlled two-way valve 48 is switched.
- the Valve 47 can either be a switching valve (open-close valve) or, as shown, be a experimental valve.
- the pilot print for Valve 47 is the return pressure of the slewing gear between the valve 39 and the throttle 42.
- the hammer drill 9 described works as follows: Im Normal operation is the slide of the valve 39 in the lower one Position so that the feed pressure at the throttle 40 in the line 30 is pending and the line 31 connected to the return 37 is.
- the valve 46 is switched on. While running Engine 10 results in a dynamic pressure upstream of throttle 42, so that the valve 47 is also switched on and the striking mechanism 11 running. If the drill pipe should get stuck in the rock, The engine 10 stops. The pilot pressure also drops immediately Valve 47 off, so that it switches off and the striking mechanism 11 stops.
- the hammer drill is opened withdrawn his gun carriage.
- the valve 39 is switched off.
- the hammer mechanism can be activated by switching on the valve 48 be turned on despite the engine 10 stopped, so that Hammer vibrates. If that often screwed together from several rods If the drill pipe is to be dismantled, the The rearmost boring bar is extended from the borehole and the drill pipe on the sleeve to the second rear boring bar with one Clamping device clamped. Now the valve 39 is in its upper Position switched so that a torque on the adapter in the releasing Senses. If the threaded connection is stuck, it can the hammer mechanism 11 again by switching on the valves 46, 48 switched on and the threaded connection vibrated.
- the hammer described is very versatile in use, because the striking mechanism and the boring machine operated independently of each other can still be the hammer mechanism when drilling stops immediately if the slewing gear does not turn. With that the time-consuming and sometimes impossible disassembly of a hammered, jammed drill pipe avoided.
- the throttle 42 can do so be set so that the valve 47 switches off before the engine 10 has come to a complete standstill. This is from Advantage, because it makes the drill pipe stick even more securely is avoided. If the valve 47 as a proportional valve trained, can also be achieved that the Beat frequency increases with increasing speed of the motor 10.
- the Ratio between speed and stroke frequency can with the Throttle 42 can be set, which for several types of rock Advantage is.
- the hammer drill according to the invention is essential more simply constructed than the one mentioned at the beginning. That is why his External dimensions smaller, which is due to the limited space in tunneling or on superstructures of milling machines an advantage is.
- the hammer mechanism valve 17 can, for example, laterally be installed so that the hammer drill 9 closer to the carriage can be assembled. This will make the drilling feed occurring moments smaller. Because the hydraulic coupling between slewing gear and striking mechanism from the return pressure of the rotating motor is derived, it is independent of the feed pressure at Rotary engine. This makes the hammer drill very flexible in use, especially for drilling in different rock types because the feed pressure is optimally adapted to the rock to be drilled can be.
- the circuit described is suitable for hydraulic also for pneumatic drives.
- valves especially those outside the Hammer 9
- the actuation of the valves, especially those outside the Hammer 9 can alternatively to the type shown hydraulically, pneumatically, electrically or by hand.
- Um with the right rotation, that means when loosening the thread of the drill pipe, that is, if at port A7 of valve 39 the Feed pressure is pending, to be able to operate the striking mechanism is the Connection 56 of the motor 55 additionally via an orifice 58 manual switching valve 59 and a check valve 60 with the Line 30 connected. So if a torque on the rotary motor 10 is in the loosening sense without turning, that is with tight thread, the thread can be switched on manually of the striking mechanism 11 can be shaken off. If with that Rotary hammer 9 is to be drilled in the clockwise sense, what For example, in Australia, the two connections swapped to the rotary motor 10.
- the embodiment of Figure 3 is constructed similarly to that according to FIG. 2.
- the elements 52 to 56 and 58 to 60 installed in the hammer drill 9.
- the valve 59 is not manually controlled, but via a pilot line 63 from one hand-operated valve 64 pilot operated.
- the stroke engine 55 drives the hammer mechanism valve 17 directly, so it is in this case a hammer mechanism valve motor.
- the mode of action is analogous to that the embodiment of Figure 2.
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
- Percussive Tools And Related Accessories (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Percussion Or Vibration Massage (AREA)
Description
Claims (10)
- Bohrhammer mit einem Drehmotor (10) und einem Schlagwerk (11) mit einem Schlagwerkventil (17), wobei der Drehmotor (10) über ein erstes Ventil (39) und das Schlagwerkventil (17) über ein zweites Ventil (46) in einem Steuerstand (34) mit einem Druckmedium beaufschlagbar sind, wobei die Schlagfrequenz des Schlagwerks (11) mit der Drehzahl des Drehmotors (10) derart verknüpft ist, dass bei stillstehendem Drehmotor das Schlagwerk stoppt, dadurch gekennzeichnet, dass in einer Rücklaufleitung (31, 37) vom Drehmotor (10) eine vorzugsweise einstellbare Drossel (42, 52) eingebaut ist, und dass der Druck stromaufwärts dieser Drossel (42, 52) zur Steuerung des Schlagwerks (11) eingesetzt ist.
- Bohrhammer nach Anspruch 1, wobei die Drossel (42) in einer Rücklaufleitung vom ersten Ventil (39) eingebaut ist, und wobei der Druck stromaufwärts dieser Drossel (42) als Steuerdruck auf ein pilotgesteuertes drittes Ventil (47) aufgeschaltet ist, welches in einer der beiden Leitungen (32, 33) zum Schlagwerkventil (17) angeordnet ist, um diese Leitung (32, 33) zu sperren, wenn der Druck stromaufwärts der Drossel (42) einen vorgegebenen Minimalwert unterschreitet.
- Bohrhammer nach Anspruch 2, wobei das dritte Ventil (47) ein Proportionalventil ist.
- Bohrhammer nach Anspruch 2 oder 3, wobei in beiden Leitungen (30, 31) zum Drehmotor (10) je eine vorzugsweise einstellbare weitere Drossel (40) mit einem parallel geschalteten Rückschlagventil (41) angeordnet ist, welches in Rücklaufrichtung öffnet.
- Bohrhammer nach einem der Ansprüche 2 bis 4, wobei parallel zum dritten Ventil (47) ein manuell direkt oder fernbetätigtes viertes Ventil (48) geschaltet ist.
- Bohrhammer nach Anspruch 1, wobei mindestens ein Teilstrom in einer der Leitungen (31) zum Drehmotor (10) über einen Taktermotor (55) geführt ist, welcher das Schlagwerkventil (17) steuert.
- Bohrhammer nach Anspruch 6, wobei in einer der Leitungen zum Taktermotor (55) ein vorzugsweise einstellbares Überdruckventil (54) angeordnet ist, so dass der Taktermotor (55) stoppt, bevor der Drehmotor (10) stillsteht.
- Bohrhammer nach Anspruch 6 oder 7, wobei der Taktermotor (55) zusätzlich mittels eines manuell direkt oder fernbetätigten dritten Ventils (59) über eine einstellbare weitere Drossel (58) beaufschlagbar ist.
- Bohrhammer nach einem der Ansprüche 6 bis 8, wobei der Taktermotor (55) ein Takterventil (57) betätigt, welches das Schlagwerkventil (17) steuert.
- Bohrhammer nach einem der Ansprüche 6 bis 8, wobei der Taktermotor (55) direkt das Schlagwerkventil (17) antreibt.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT97810731T ATE217564T1 (de) | 1997-10-03 | 1997-10-03 | Bohrhammer |
DE59707289T DE59707289D1 (de) | 1997-10-03 | 1997-10-03 | Bohrhammer |
EP97810731A EP0906811B1 (de) | 1997-10-03 | 1997-10-03 | Bohrhammer |
CA002248697A CA2248697A1 (en) | 1997-10-03 | 1998-09-23 | Rock drill |
JP10279567A JPH11159272A (ja) | 1997-10-03 | 1998-10-01 | 削岩機 |
US09/165,862 US6119793A (en) | 1997-10-03 | 1998-10-02 | Rock drill |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97810731A EP0906811B1 (de) | 1997-10-03 | 1997-10-03 | Bohrhammer |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0906811A1 EP0906811A1 (de) | 1999-04-07 |
EP0906811B1 true EP0906811B1 (de) | 2002-05-15 |
Family
ID=8230413
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97810731A Expired - Lifetime EP0906811B1 (de) | 1997-10-03 | 1997-10-03 | Bohrhammer |
Country Status (6)
Country | Link |
---|---|
US (1) | US6119793A (de) |
EP (1) | EP0906811B1 (de) |
JP (1) | JPH11159272A (de) |
AT (1) | ATE217564T1 (de) |
CA (1) | CA2248697A1 (de) |
DE (1) | DE59707289D1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014011073B3 (de) * | 2014-07-30 | 2015-11-12 | Danfoss Power Solutions Gmbh & Co. Ohg | 1Motordrehzahlbegrenzungsvorrichtung |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2802970B1 (fr) * | 1999-12-23 | 2002-03-08 | Montabert Ets | Dispositif d'alimentation hydraulique d'un appareil de forage roto-percutant |
FI119654B (fi) * | 2002-11-05 | 2009-01-30 | Sandvik Tamrock Oy | Menetelmä ainakin kahden hydraulisen toimilaitteen toiminnan ohjaamiseksi, seurantaventtiili sekä edelleen kallionporauslaite |
CN102425401B (zh) * | 2011-11-18 | 2014-05-28 | 山河智能装备股份有限公司 | 液压凿岩钻机凿岩动作电液逻辑控制回路 |
SE538237C2 (sv) * | 2014-07-04 | 2016-04-12 | Lkab Wassara Ab | Vätskedriven sänkborrmaskin med indexering medelst intermittent trycksättning |
CN108194444B (zh) * | 2018-03-20 | 2024-02-13 | 马鞍山唐拓凿岩机械有限公司 | 一种顶锤钻机的防空打液压系统及其控制方法 |
CN109854553B (zh) * | 2019-04-03 | 2024-04-19 | 四川钻神智能机械制造有限公司 | 一种凿岩台车的遇空洞防卡钎系统 |
CN112628231B (zh) * | 2021-01-29 | 2022-08-02 | 中铁工程装备集团有限公司 | 一种自动钻进控制阀组、控制系统及其控制方法 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2129276A5 (de) * | 1971-03-18 | 1972-10-27 | Montabert Ets | |
US4023626A (en) * | 1975-03-17 | 1977-05-17 | Oy Tampella Ab | Self-adaptive hydraulic rock drill |
US4006783A (en) * | 1975-03-17 | 1977-02-08 | Linden-Alimak Ab | Hydraulic operated rock drilling apparatus |
US4064950A (en) * | 1976-07-19 | 1977-12-27 | Pekka Salmi | Hydraulic drilling machine |
US4157736A (en) * | 1978-01-11 | 1979-06-12 | Carbert Ralph E | Overload protection apparatus for hydraulic multi-function equipment |
FI56723C (fi) * | 1978-05-11 | 1980-03-10 | Tampella Oy Ab | Styrningssystem foer borrmaskin |
JPS5655684A (en) * | 1979-10-06 | 1981-05-16 | Toyo Kogyo Co | Feed controller circuit for hydraulic rock driller |
FI67604C (fi) * | 1983-06-14 | 1985-04-10 | Tampella Oy Ab | Foerfarande och anordning foer reglering av matningsroerelsen hos en borrstaong vid bergborrning |
AT381363B (de) * | 1983-11-08 | 1986-10-10 | Ver Edelstahlwerke Ag | Vorrichtung zum schlagenden bohren |
CH677813A5 (de) * | 1988-04-26 | 1991-06-28 | Karagandinskij Polt Institut | |
FI86008C (fi) * | 1989-04-06 | 1992-06-25 | Tampella Oy Ab | Foerfarande och anordning foer reglering av en bergborrningsmaskin. |
DE4027021A1 (de) * | 1990-08-27 | 1992-03-05 | Krupp Maschinentechnik | Hydraulisch betriebene schlagdrehbohrvorrichtung, insbesondere zum ankerlochbohren |
JPH06108770A (ja) | 1992-08-31 | 1994-04-19 | Sig (Schweiz Ind Ges) | ロックドリル用ドリル装置 |
FI95166C (fi) * | 1994-04-14 | 1995-12-27 | Tamrock Oy | Sovitelma painenestekäyttöisessä kallionporauslaitteessa |
-
1997
- 1997-10-03 EP EP97810731A patent/EP0906811B1/de not_active Expired - Lifetime
- 1997-10-03 AT AT97810731T patent/ATE217564T1/de not_active IP Right Cessation
- 1997-10-03 DE DE59707289T patent/DE59707289D1/de not_active Expired - Fee Related
-
1998
- 1998-09-23 CA CA002248697A patent/CA2248697A1/en not_active Abandoned
- 1998-10-01 JP JP10279567A patent/JPH11159272A/ja active Pending
- 1998-10-02 US US09/165,862 patent/US6119793A/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014011073B3 (de) * | 2014-07-30 | 2015-11-12 | Danfoss Power Solutions Gmbh & Co. Ohg | 1Motordrehzahlbegrenzungsvorrichtung |
Also Published As
Publication number | Publication date |
---|---|
CA2248697A1 (en) | 1999-04-03 |
DE59707289D1 (de) | 2002-06-20 |
ATE217564T1 (de) | 2002-06-15 |
US6119793A (en) | 2000-09-19 |
EP0906811A1 (de) | 1999-04-07 |
JPH11159272A (ja) | 1999-06-15 |
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