EP0004946A1 - Marteau de forage, notamment marteau fond-de-trou - Google Patents

Marteau de forage, notamment marteau fond-de-trou Download PDF

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Publication number
EP0004946A1
EP0004946A1 EP79101125A EP79101125A EP0004946A1 EP 0004946 A1 EP0004946 A1 EP 0004946A1 EP 79101125 A EP79101125 A EP 79101125A EP 79101125 A EP79101125 A EP 79101125A EP 0004946 A1 EP0004946 A1 EP 0004946A1
Authority
EP
European Patent Office
Prior art keywords
hammer drill
hammer
control housing
tube
sliding tube
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.)
Granted
Application number
EP79101125A
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German (de)
English (en)
Other versions
EP0004946B1 (fr
Inventor
Hans-Philipp Walter
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0004946A1 publication Critical patent/EP0004946A1/fr
Application granted granted Critical
Publication of EP0004946B1 publication Critical patent/EP0004946B1/fr
Expired legal-status Critical Current

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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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/06—Down-hole impacting means, e.g. hammers
    • E21B4/14—Fluid operated hammers

Definitions

  • the present invention relates to a pneumatically driven hammer drill, in particular a deep hole hammer, with an outer tube and through hole in an upper cap for connection to a compressed air source and optionally to a drill pipe, with the control housing, control body and cylindrical slide tube supported on the cap, along which a pierced percussion piston is movable up and down in the outer tube, and with a radially divided lower retaining cap of disharmonious polygonal inner profile, in which a polygonal shaft, likewise pierced, of a drill bit provided with flushing bores is movably supported up and down.
  • Such hammer drills are known from DE-PS 26 09 376.
  • DE-PS 23 62 724 and GB-PS 1 419 981 describe deep hole drilling hammers in a similar configuration, but without polygonal profile elements, in which, however, the guide tube itself is movably mounted up and down and protrudes into the head of the drill bit, which has considerable disadvantages.
  • the serration of the drill bit shaft provided for rotary driving is deformed or jammed, at least when an eccentric position of the sliding tube causes a force transmission to the outer tube or from there.
  • an intermediate piston is arranged between the percussion piston and the drill bit head and is guided at least in part on the sliding tube, which is positively connected to the control housing, in particular via buffer rings. Thanks to this training, the hammer either runs in intermittent operation, the impact can be switched on and off, or overall continuously.
  • the impact of the impact piston is transferred to the drill bit head by the intermediate piston, which has an important buffer function. It contributes significantly to the air flow and causes a vibration effect with continuous air strikes even when the percussion piston is intercepted by an air cushion with a deeply immersed intermediate piston or sagging drill bit and no longer strikes the intermediate piston.
  • the casing body provided according to claims 6 and 7 and its outer groove profile allow the hammer to be opened more easily than before in the event of malfunctions or chisel changes.
  • Conventional rotary hammers can sometimes not be released at all, while others are severely weakened in the casing and have predetermined breaking points.
  • attaching the necessarily heavy tool creates a high risk of accidents, since it slips and falls easily with conventional designs.
  • a closed tool can be used, which is temporarily fixed by one or more bolts on the circumference of the hammer, in particular the casing body.
  • the embodiment according to claim 8 creates a multi-channel inner tube control system that works extremely reliably with a simple and stable structure.
  • Favorable is by name a four-channel system with intersecting pairs of opposing exhaust and return stroke channels; this ensures that the air flows out very evenly and the piston cannot jam.
  • claims 9 and 10 result in a particularly good coordination between the buffering space and the lower opening to the return stroke channel.
  • the dimensioning can be made in this way. be that the greatest performance is achieved with a half-sagging drill bit, while with increasing chisel path there is a gradual decrease in output until pure buffer operation, which prevents the chisel head and the stop parts from being smashed.
  • the buffer sleeve is provided with adapted ventilation grooves in order to transfer the impact energy to the maximum, whereby the buffer effect starts somewhat delayed, but the piston is not caught too early or too strongly.
  • the air which continues to flow intermittently or continuously, causes a good flushing on or around the drill bit, even while the percussion piston no longer comes into metallic contact with the intermediate piston due to the air spring formed.
  • the measure of claim 13 contributes to this, since the enlarged head of the intermediate piston exactly limits the buffer volume when entering an upper annular space of the buffer sleeve.
  • a check valve located below By using a check valve located below, the inside of the hammer is reliably protected and at the same time the air flow is further improved; a "standing" air cushion, which would quickly overheat due to high-frequency adiabatic compression, cannot form.
  • a check valve - if at all - was usually only arranged in the upper part of the hammer above the control, so that when the hammer was turned off, its lower part was fully exposed to the penetration of cuttings, dust, water, etc.
  • a threaded plug provided according to claim 17 on the head of the lower control housing part can, if necessary, be designed as a nozzle which, with a predetermined cross section, allows an additional air passage if this is desired.
  • the control can be changed as required by replacing the threaded plug. It can be omitted if, for use as a water hammer, the entire control housing is penetrated by a central tube or bore through which water can be introduced.
  • the hammer drill 10 shown has an outer tube 12 and an upper cap 14 which is provided with a threaded connection 16 and wrench flats 18 and has a through hole 2C.
  • a suitable connection can be attached to the rotary hammer 10 by simply changing the cap 14.
  • the cap 14 screws with a jacket body 22, which in turn is screwed to the outer tube 12 and comes into contact with the collar or shoulder 28 thereof.
  • a grooved profile 24 is provided on the outside of the jacket body 22, via which a closed key (not shown) can be pushed and fixed in the circumferential and axial directions by at least one socket pin.
  • the hammer drill 10 can also have a corresponding groove profile at other points, for example at its lower end.
  • the upper part 30 of a three-part control housing is supported on the cap 14 in the jacket body 22 via buffer rings 26 and 27, which would consist of elastomers such as polyurethane.
  • the upper part 30 is provided with a number of oblique channels 36 distributed over the circumference.
  • On its underside it has a valve seat 38 for a control body 40, which is movable back and forth in the axial direction between a valve support 42 of the control housing middle part 32 and the valve seat 38 of the upper part 30 and is guided centrally in the middle part 32.
  • the latter is distributed over the circumference with a number Inclined channels 44 and following the control body 40 with a chamber 48.
  • outer or side channels 46 lead to the head of the lower part 34, at least one of which opens into bores 52 which are incorporated in the head of the lower part 34 of the control housing.
  • An axial section of the bores 52 is closed with a threaded plug 54 which, if necessary, can be replaced by a nozzle of a suitable diameter.
  • a number of passages 50 distributed over the circumference create a flow connection between the chamber 48 and an annular space 55 in the interior of the outer tube 12.
  • An insert 62 is integral with the control housing lower part 34 and has a sliding tube 60 connected to it integrally. To secure this attachment, a screw connection (not shown) may be present.
  • lower part 34 or insert 62 and sliding tube 60 are penetrated by a transverse pin 58 with a precise fit just below a collar 35. This is dimensioned in length so that it fits into the inside width of a collar 56 of the casing body 22 and is thereby secured against movements in the direction of its axis.
  • the insert 62 has, as can be seen from FIGS. 2 and 3, partitions 64 which connect to one another in a star shape in cross-section and bear with surfaces 66 on the inside of the sliding tube 60. The length of the insert 62 can match that of the sliding tube 60 or, as drawn in FIGS. 1b and 2, may be somewhat shorter.
  • the sliding tube 60 At the lower end of the sliding tube 60, as shown in FIG. 2, it can have an inwardly projecting collar 61 which is chamfered and serves as a valve seat for the valve body 59 of a check valve.
  • the body 59 is slidably supported on a pin 63 which extends the insert 62 coaxially and is supported against the end thereof, to which nuts 63a can be screwed in a suitable manner, by a compression spring 65, which is partially immersed in the body 59.
  • the sliding tube 60 each has a preferably elongated outlet 69 (shown in broken lines in FIG. 1b) for two exhaust channels 67, which are formed by the four web walls 64 together with two return stroke channels 68.
  • the arrangement is preferably such that the diametrically opposite exhaust ducts 67 have a larger cross-section than the crossed return stroke ducts 68; the ratio of the cross sections can be 3: 2, for example.
  • the sliding tube 60 At the lower end of the sliding tube 60, it has a lateral ventilation opening 74 for establishing a flow connection between each return stroke channel 68 and a compression space 76, which is present between the outer tube 12 and the sliding tube 60 below a percussion piston 70.
  • a lateral ventilation opening 74 Above the ventilation openings 74, an upper idle or shut-off hole 71 leads to the exhaust ducts 67, while below the openings 74 a smaller lower shut-off hole 73 opens into a chamber 115, which is located in the sliding tube 60 at the lower end of the insert 62.
  • the percussion piston 70 is guided in the outer tube 12 and provided with circumferential grooves 72. Its lower end faces axially opposite the head 82 of an intermediate piston 80. Percussion piston 70 and intermediate piston 80 slide along tube 60.
  • the intermediate piston 80 is partially guided on the sliding tube 60 and in a buffer sleeve 78 which is inserted into the outer tube 12 from below and has adapted longitudinal grooves 79.
  • the intermediate piston 80 has two or more radial outlets 84; In the exemplary embodiment according to FIGS. 1 b, 5 and 6, there are three such radial outlets 84 which establish the flow connection to a lower annular space 88.
  • An upper annular space 86 connects to the compression space 76 in the buffer sleeve 78.
  • a retaining cap 90 which is formed in two parts, held together by pins 92 and into the outside, serves to fasten both the buffer sleeve 78 and a drill bit 94 tube 12 is screwed in from below.
  • the holding cap 90 has a disharmonious polygon profile, in particular of the PC4 type, as described in DE-PS 26 09 376.
  • the drill bit 94 has a head 106 with an enlarged diameter and a shank 96 which - as can be seen in FIG. 4 - has a precisely adapted polygonal profile with slightly curved surfaces and strongly rounded edges.
  • the hammer drill 10 It is essential for the hammer drill 10 according to the invention that it enables a robust construction with high space utilization with simplified and improved control. Practical designs with outer tube diameters from 80 mm to 135 mm have achieved surprising drilling progress in operation with a pressure of 13 bar, even in unfavorable rock conditions. This contributes to the fact that the intermediate piston 80 guided in the buffer sleeve 78 is constantly on the drill bit head 106 and thus either releases the return air bore 74 or closes it (partially or completely). If the head 82 of the intermediate piston 80 completely enters the upper annular space 86, the compression space 76 located above it prevents the impact piston 70 from striking by its air cushion.
  • the lower annular space 88 serves primarily for air distribution to the ventilation channels 98, 100, 112. This complete ventilation allows the drill bit head 106 to move down to the stop shoulder 108 of the holding cap 90. Between this and the drill bit there is the practically wear-free polygon guide, which allows the transmission of torques in a wide range even with large axial forces.
  • the conventionally given risk of breakage for the lower end of the sliding tube is eliminated according to the invention in a simple and effective manner.
  • the sliding tube 60 is optimally protected by its connection to the insert 62 or the lower control housing part 34, especially since the drill bit 94 never comes into contact with the sliding tube 60.
  • the upper parts 30, 32 of the control housing are greatly simplified, which not only greatly simplifies manufacture and assembly, but also increases functional reliability.
  • the available cross sections are used optimally.
  • effective assembly and disassembly aids are provided in the form of the key grooves 24 and key surfaces 18, which considerably shorten the set-up and downtimes compared to conventional rotary hammers.
  • the clear structure ultimately helps to make maintenance and repair work easier and thereby accelerate it without the mechanical and wear resistance being impaired in any way. While the mode of operation largely corresponds to that of the deep hole hammer according to DE-FB 26 09 376, the versatility of use and the cost-effectiveness of use is considerably increased.
  • a central tube 113 (shown in dashed lines in FIGS. 1a and 1b), which passes through the control body upper part 30 and middle part 32 and projects into the lower part 34, where in the insert 62 a central bore 114 (indicated in FIG. 3) with dashed lines) water can be introduced and the device can also be used as a water hammer. It can be seen that no additional effort is required for this; the threaded plug 54 can be omitted or modified accordingly.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
EP79101125A 1978-04-18 1979-04-12 Marteau de forage, notamment marteau fond-de-trou Expired EP0004946B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2816737A DE2816737C3 (de) 1978-04-18 1978-04-18 Bohrhammer, Insbesondere Tieflochhammer
DE2816737 1978-04-18

Publications (2)

Publication Number Publication Date
EP0004946A1 true EP0004946A1 (fr) 1979-10-31
EP0004946B1 EP0004946B1 (fr) 1981-10-14

Family

ID=6037272

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79101125A Expired EP0004946B1 (fr) 1978-04-18 1979-04-12 Marteau de forage, notamment marteau fond-de-trou

Country Status (4)

Country Link
US (1) US4280570A (fr)
EP (1) EP0004946B1 (fr)
AT (1) AT363427B (fr)
DE (1) DE2816737C3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0011219A1 (fr) * 1978-11-10 1980-05-28 Halifax Tool Company Limited Jonction d'éléments définissant un passage d'écoulement de fluid pour marteau perforateur mis en oeuvre au fond d'un trou de forage
GB2151930A (en) * 1983-12-27 1985-07-31 American Hospital Supply Corp Improved blood heat exchanger
CN105378206A (zh) * 2013-07-12 2016-03-02 钻岩气动有限公司 用于井下锤钻的动态密封管

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4726429A (en) * 1984-07-13 1988-02-23 Kennedy James D Percussion down hole drilling tool with central fluid flushing passage
US4694911A (en) * 1984-07-13 1987-09-22 Kennedy James D Drilling assembly for percussion drilling of deep wells
SE8501698L (sv) * 1985-04-04 1986-10-05 Santrade Ltd Borrkrona
DE3726014C2 (de) * 1987-08-05 1994-03-03 Fritz Zimmermann Masch U Appar Hochdruck-Tieflochbohrhammer, beispielsweise für Injektionsbohrungen
DE4113323A1 (de) * 1991-04-24 1992-10-29 Krupp Maschinentechnik Schlagwerk fuer ein bohrgestaenge
DE9200271U1 (de) * 1992-01-11 1992-04-16 Ingenieurkontor für Maschinenkonstruktion GmbH, O-9055 Chemnitz Druckluft-Versenkbohrhammer mit Drehmechanismus für das Bohrwerkzeug
US5402854A (en) * 1992-10-06 1995-04-04 Ingersoll-Rand Company Fluid distributor for a debris flushing system in a percussive, fluid-activated apparatus
DE9319223U1 (de) * 1993-12-15 1994-02-24 Walter, Hans-Philipp, 74251 Lehrensteinsfeld Bohrhammer
SE527698C2 (sv) * 2004-10-07 2006-05-16 Atlas Copco Rock Drills Ab Bergborrningsanordning
US9404342B2 (en) 2013-11-13 2016-08-02 Varel International Ind., L.P. Top mounted choke for percussion tool
US9562392B2 (en) 2013-11-13 2017-02-07 Varel International Ind., L.P. Field removable choke for mounting in the piston of a rotary percussion tool
US9328558B2 (en) * 2013-11-13 2016-05-03 Varel International Ind., L.P. Coating of the piston for a rotating percussion system in downhole drilling
US9415496B2 (en) 2013-11-13 2016-08-16 Varel International Ind., L.P. Double wall flow tube for percussion tool
CN104405280B (zh) * 2014-12-10 2016-09-07 吉林大学 冲程差动式高能液动潜孔冲击器
EP3670823A1 (fr) * 2018-12-17 2020-06-24 Sandvik Mining and Construction Oy Ensemble de trépan de marteau fond-de-trou
EP3670824A1 (fr) * 2018-12-17 2020-06-24 Sandvik Mining and Construction Oy Trépan de forage de roche pour forage percussif

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1035075B (de) * 1957-03-20 1958-07-31 Ingbuero Dipl Ing Friedrich He Grosslochbohrmaschine
US2851251A (en) * 1954-04-27 1958-09-09 Gulf Research Development Co Hammer drill
US2942578A (en) * 1957-04-24 1960-06-28 Gardner Denver Co Rock drill
US3045768A (en) * 1958-07-14 1962-07-24 Gardner Denver Co Fluid operated percussion drill
US3084673A (en) * 1962-04-16 1963-04-09 St Joseph Lead Co Down-hole drill
US3180434A (en) * 1963-09-09 1965-04-27 Pan American Petroleum Corp Fluid-driven percussion tool
DE1947213A1 (de) * 1968-09-26 1970-04-09 Gardner Denver Co Abluftrohr fuer Bohrloch-Bohrmaschinen
DE1962185B2 (de) * 1969-05-23 1971-05-13 Stenuick Freres Pneumatisch betaetigter versenkbohrhammer
DE2551303A1 (de) * 1975-11-14 1977-06-16 Inst Gornowo Dela Sib Otdel Ak Versenkbare druckluftbohrmaschine schlagend-umsetzender wirkung mit eigenbewegung

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1868684A (en) * 1928-10-26 1932-07-26 Ingersoll Rand Co Cleansing fluid conveying tube
US2661928A (en) * 1952-02-09 1953-12-08 Gulf Research Development Co Hammer drill
US2800884A (en) * 1956-02-24 1957-07-30 Gulf Research Development Co Positive displacement-type hammer drill
US3011570A (en) * 1957-02-01 1961-12-05 Ingersoll Rand Co Rock drill
DE1094688B (de) * 1959-06-18 1960-12-15 Beteiligungs & Patentverw Gmbh Pressluft-Schlaggeraet
US3164214A (en) * 1963-04-25 1965-01-05 Ingersoll Rand Co Rock drill
US3768576A (en) * 1971-10-07 1973-10-30 L Martini Percussion drilling system
US3854539A (en) * 1972-08-23 1974-12-17 Tigre Tierra Drilling apparatus with down hole motor
US3970152A (en) * 1974-06-14 1976-07-20 Bassinger Tool Enterprises, Ltd. Mud actuated drilling tool
US3991834A (en) * 1975-07-07 1976-11-16 Curington Alfred R Sampling airhammer apparatus
US4030554A (en) * 1975-07-07 1977-06-21 Bakerdrill, Inc. Bore hole airhammer and anvil bit
DE2609376C3 (de) * 1976-03-06 1978-09-07 H.P. Walter Gmbh + Co Drucklufttechnik Kg, 3570 Stadt Allendorf Tieflochbohrhammer
GB1585086A (en) * 1976-07-28 1981-02-25 Compair Constr Mining Ltd Down-the-hole percussion drills
US4163478A (en) * 1978-09-15 1979-08-07 Adcock Gerald L Self aligning impact rock drilling tool

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2851251A (en) * 1954-04-27 1958-09-09 Gulf Research Development Co Hammer drill
DE1035075B (de) * 1957-03-20 1958-07-31 Ingbuero Dipl Ing Friedrich He Grosslochbohrmaschine
US2942578A (en) * 1957-04-24 1960-06-28 Gardner Denver Co Rock drill
US3045768A (en) * 1958-07-14 1962-07-24 Gardner Denver Co Fluid operated percussion drill
US3084673A (en) * 1962-04-16 1963-04-09 St Joseph Lead Co Down-hole drill
US3180434A (en) * 1963-09-09 1965-04-27 Pan American Petroleum Corp Fluid-driven percussion tool
DE1947213A1 (de) * 1968-09-26 1970-04-09 Gardner Denver Co Abluftrohr fuer Bohrloch-Bohrmaschinen
DE1962185B2 (de) * 1969-05-23 1971-05-13 Stenuick Freres Pneumatisch betaetigter versenkbohrhammer
DE2551303A1 (de) * 1975-11-14 1977-06-16 Inst Gornowo Dela Sib Otdel Ak Versenkbare druckluftbohrmaschine schlagend-umsetzender wirkung mit eigenbewegung

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0011219A1 (fr) * 1978-11-10 1980-05-28 Halifax Tool Company Limited Jonction d'éléments définissant un passage d'écoulement de fluid pour marteau perforateur mis en oeuvre au fond d'un trou de forage
GB2151930A (en) * 1983-12-27 1985-07-31 American Hospital Supply Corp Improved blood heat exchanger
CN105378206A (zh) * 2013-07-12 2016-03-02 钻岩气动有限公司 用于井下锤钻的动态密封管
CN105378206B (zh) * 2013-07-12 2019-03-26 钻岩气动有限公司 用于井下锤钻的动态密封管

Also Published As

Publication number Publication date
DE2816737C3 (de) 1981-03-19
DE2816737B2 (de) 1980-07-10
AT363427B (de) 1981-08-10
ATA277979A (de) 1981-01-15
DE2816737A1 (de) 1979-10-25
EP0004946B1 (fr) 1981-10-14
US4280570A (en) 1981-07-28

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