EP0837214A2 - Foreuse à percussion - Google Patents
Foreuse à percussion Download PDFInfo
- Publication number
- EP0837214A2 EP0837214A2 EP97117438A EP97117438A EP0837214A2 EP 0837214 A2 EP0837214 A2 EP 0837214A2 EP 97117438 A EP97117438 A EP 97117438A EP 97117438 A EP97117438 A EP 97117438A EP 0837214 A2 EP0837214 A2 EP 0837214A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- hammer drill
- control pin
- sleeve
- control
- drill according
- 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.)
- Ceased
Links
- 238000009527 percussion Methods 0.000 claims description 30
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 8
- 230000004323 axial length Effects 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 4
- 229920006324 polyoxymethylene Polymers 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- DHKHKXVYLBGOIT-UHFFFAOYSA-N 1,1-Diethoxyethane Chemical compound CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 1
- 229920004943 Delrin® Polymers 0.000 description 1
- 229930040373 Paraformaldehyde Natural products 0.000 description 1
- 239000011354 acetal resin Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- -1 polyoxymethylene Polymers 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
- B25D9/14—Control devices for the reciprocating piston
-
- 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, especially deep hole hammer, according to the preamble of claim 1.
- DE-U-9 202 336 describes a hammer drill of the type mentioned at the outset can also be used in difficult rock. He has for air dosing a rotatably driven tubular body and a slidable one Central passage shaft, the lower end with the tubular body Shut-off device, e.g. forms a slide that creates an air deflection space as required releases or - if necessary partially - closes.
- Shut-off device e.g. forms a slide that creates an air deflection space as required releases or - if necessary partially - closes.
- the neck can the shaft connected to the tubular body and a leading shaft on it Pipe head provided with a number of holes as a result of relative weak cross-sections are at risk of breakage, especially since the length of the hammer drill is included large lever arm attacks it.
- the hammer drill is said to be large Provide long service life, even with an increased stroke frequency manage with low compressed air consumption and work relatively quietly.
- the invention provides according Claim 1 before that between the piston-guiding cylinder liner with a Rifle attachment and the outer tube at least partially form-fitting to one Unit is firmly connected, and one above, with the outer tube an annular gap is welded along a circumferentially welded threaded sleeve is present and that the upper end of the percussion piston with the control pin cooperating shut-off forms, in particular a slide valve.
- control pin according to claim 2 has a tubular body upwards with a perforated flange or disc head on one axial and / or radially projecting collar within the threaded sleeve and after supported at the bottom on a sleeve that delimits the annular gap on the inside.
- claim 3 according to which the check valve is advantageous, is structurally advantageous is carried by a cover plate which is attached to the screw cap connects and passages close to the circumference as well as one protruding downwards Bund has.
- This arrangement is extremely simple and stable; it ensures always good air supply.
- this is supported by a convex Curving of the control pin plate head, especially with rounded transitions to the circumferential passages and / or to the inner chamber.
- a particularly reliable construction results according to claim 5 by the Sleeve is formed hat-shaped and with a lower bounding the annular gap below Collar, flange or the like is supported on a rifle attachment on the Cylinder liner sits and on its upper part axially parallel to the outer tube Has recesses. This ensures a stable attachment still leaves room for small movements of the control pin, e.g. at operational vibrations.
- This is further promoted by the measure of claim 6, after which between the plate head and the sleeve Sealing ring and / or between the sleeve and the sleeve top part flexible ring is arranged to compensate for a certain position and tolerance to achieve.
- the cylinder liner and the Rifle top part are designed as finned tubes with the same profile, results there is also a large-volume channeled air duct in the lower hammer area.
- control bush according to claim 10 has such an axial length that the circumferential recess of the Control pin and its cross holes closed. With the drill bit pressed the hammer drill therefore starts up easily; at the same time the Compression chamber vented above the percussion piston.
- the Inner chamber of the control pin receives an insert and with one in it preferably centrally arranged channel flow-connected or connectable is. This makes it possible to flow through a constant amount of air to let. This is particularly advantageous in difficult rock conditions.
- a flow restrictor attached or attachable according to claim 14
- a lockable or screwable plug can be with or without passage. So in particular with different large bores equipped flow restrictors selected and used in order to take account of the air requirements caused by local conditions to wear.
- a hammer drill generally designated 10, has, as can be seen from FIG. 1, a screw cap 11 with a central passage 12 and a threaded connection 13, with the interposition of a sealing ring 14 for connection of the main hammer body is used.
- a strainer 16 is in the Screw cap 11 which can be screwed to a threaded bushing 50. This is welded to an outer tube 15 along a cylindrical welding zone S.
- An annular gap 54 is between the outer tube 15 and a cylinder liner 70 formed, which leads a percussion piston 75.
- the outer tube 15 has - starting at the lower area of welding zone S and threaded bush 50 - over the Scope distributed longitudinal longitudinal grooves 17, the approach of a Serve tool when screwing to the cap 11.
- the screw cap 11 encloses an upward check valve 30, which is guided on a shaft 28 and the valve spring 29 there to a valve seat 18 charged.
- Bottom side engages in the screw cap 11 within the Threaded sleeve 50 a cover plate 26, which preferably with the circumference axially extending passages 24 is provided, e.g. with a wreath of four Arch slits (Fig. 4).
- An adjoining control pin 40 takes one preferably tapered insert 45 and projects into a central bore without contact 82 of the percussion piston 75 guided in the cylinder liner 70, even if this is in its lowest position (left in Fig. 1).
- the use 45 of the Control pin 40 runs narrow from a diameter step 46 and has in particular an inner channel 105 in the center.
- the threaded bushing 50 delimits a distribution chamber below the screw cap 11 56, which is fluidly connected to an inner chamber 42 of the control pin 40 is.
- a control bushing 100 of the percussion piston 75 slides on the latter Slider valve through which the stroke air can be controlled.
- the closes Control pin 40 having an upwardly convex flange or plate head 41 e.g. has twelve passages 48, directly on the flat or concave cover plate 26, which is axially and / or radially projecting on the circumference Bund 52 can have.
- the plate head 41 has a groove receptacle on its underside for a sealing ring 53 to which the inner circumference of a sleeve 51 connects. This holds the plate head 41 and delimits the inside between the outer tube 15 and an upper sleeve part 55 an annular gap 54, which together with a radial gap 22 an upper chamber of relatively large volume forms.
- the cylinder liner 70 has outer ribs 71, between which the air-guiding outer channels or Longitudinal slots 60 are distributed over the circumference (Fig. 6).
- the latter sit down the with the cylinder liner 70 profile top sleeve 55, the with a collar 57 at the transition to the lower part 58 on the upper edge of the cylinder liner 70 sits and on which the sleeve 51 or the like with a flange 62.
- the lower part of the rifle attachment 58 is rotationally fixed to the cylinder liner 70 by at least one pin 59 connected.
- the control pin 40 has the shape of a tubular body. Its arched upwards Flange, plate head 41 or the like externally directed passages 48 provided the wreath of arch slots 24 of the cover plate 26 face upwards (FIGS. 4 and 5). At a paragraph 47 the plate head 41 has a circumferential groove 43 for receiving a sealing ring 53 the inner chamber 42 lead transverse or reversing bores 44 over a Circumferential recess 102 in the surrounding space. This represents in the raised position of the piston 75 is a compression chamber 83.
- the lower end of the piston 75 is with a valve surface 79 on a foot valve 97 slidable, which sits in the head 91 of a drill bit 90. It has a central one Passage 92 and is held in a retaining cap 93, which after insertion of Head 91 and shaft 95 with the interposition of a buffer sleeve 85 and one Retaining rings 86 is screwed into the outer tube 15. A shoulder 88 of the retaining ring 86 comes to a stop on the head 91 of the drill bit 90 when the percussion piston 75 hits their impact surface 89 with his punch.
- Fig. 1 also shows 3 shows two different working positions of the rotary hammer 10. The percussion piston can be seen in the right half of FIG. 3 75 in its impact position, in which its lower end on the surface 89 of the Drill bit 90 opens or is opened.
- the structure of the percussion piston 75 is shown in FIG. 2. It is generally cylindrical and has transverse grooves 77 on the outside and an outer groove approximately in its longitudinal center Annular groove 76, which defines an upper control edge 80 and a lower control edge 81. These edges guide the opening and closing of the air flow Passages 72 at the lower end of a groove-shaped annular chamber 76 (FIG. 1). Distributed over the circumference, axial bores go from the annular groove 76 open to the outside 78 to the bottom of the piston 75. Its central bore 82 can beveled at the lower end and forms a valve surface immediately above 79 with the foot valve 97 when sliding on this in the lower piston position cooperates.
- the percussion piston 75 in its upper part massive, not weakened by axial holes, so that the head surface 74 together with that of an attached control bush 100 fully for the working pressure is available.
- the control pin 40 has an outer circumferential recess 102 with an upper one Control edge 106 and a lower control edge 107. In the area between the Control edges 106, 107 of the control pin 40 have radial outlets leading to the outside 101 and / or transverse bores 44 (FIGS. 1 and 3), which also have elongated holes or longitudinal slots (Fig. 2) and with the compression chamber 83 in constant flow connection.
- the axial length of the control bush 100 is dimensioned so that it is in the deepest Position of the percussion piston 75 (right in Fig. 3), the cross bores 44 of the Control pin 40 still closes.
- the percussion piston 75 moves on the return stroke high (left in Fig. 3), so the upper end of the control bushing 100 comes from below in a sleeve attachment 55/58, the control pin 40 in concentric Distance surrounds and down with a shoulder or flange 62 below Intermediate layer of a flexible ring 64 on a collar 57 of the cylinder liner 70 is supported.
- the tubular control pin 40 goes on a diameter step 46 in the tapered insert 45 over that through the axial channel 105 to the inner chamber 42 is flow connected or connectable and as a flow restrictor or can act as a closure.
- inserts can 45 with different sized bores or without a passage (see Fig. 1 and 3) can be used to ensure that drilling operations are carried out in the best possible To adapt conditions.
- the invention is not restricted to the exemplary embodiments described, but can be modified in many ways. So you can easily between the screw cap 11 and the threaded bush 50 an adapter and / or a so-called. Install the turbo attachment as described in detail in DE-U-9 202 336. To can sit a sleeve between the connection cap 11 and an adapter, the Outer diameter is equal to that of the outer tube 15; she is with the Adapter directly or via a sliding piece including a short one guided in it Profile shaft drive-connectable. An additional, mechanical one is achieved Protected control option for airflow division, whereby on the one hand Central air brought into the drill bit 90 and on the other hand blown air as required is branched off.
- the pneumatically driven hammer drill 10 has a connection cap 11 for a compressed air source and an outer tube 15, which is firmly connected to a threaded bushing 50.
- a connection cap 11 for a compressed air source On a top part of a rifle 55 sits as a tubular body with an inner chamber 42, outer peripheral recess 102 and transverse bores 44 trained control pin 40, the has an insert 45 below and contactlessly in a central bore 82 Percussion piston 75 protrudes. This is massive at the top; to its externally open annular groove 76 - which need not be semi-oval, but e.g. as indicated by dashed lines in FIG.
- the percussion piston 75 slides on a foot valve 97, which in a Cylinder liner 70 is guided, which also has the upper part of the bushing with outer ribs 55 and the outer tube 15 at least partially positively firmly connected to a unit e.g. has shrunk.
- the control bush 100 is axially long enough to be in the impact position of the Percussion piston 75 closes the cross bores 44 of the control pin 40. in the In the lower area it has radial passages 101, which are e.g. can be formed at 60 ° circumferential intervals (Fig. 2).
- the outer Circumferential recess 102 of the control pin 40 has control edges 106 or 107, in order - in particular through the circumferential recess 102, the transverse bores 44 and the radial passages 101 - between the inner chamber 42 and a compression chamber 83 delimited by the cylinder liner 70 To establish flow connection in the upper positions of the percussion piston 75 and to close in lower positions.
- the inner chamber 42 of the control pin 40 is fluidly connectable to an insert channel 105.
- the hammer drill 10 works without additional blowing air.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Drilling Tools (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29618066U | 1996-10-18 | ||
DE29618066U DE29618066U1 (de) | 1996-10-18 | 1996-10-18 | Bohrhammer |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0837214A2 true EP0837214A2 (fr) | 1998-04-22 |
EP0837214A3 EP0837214A3 (fr) | 1999-12-08 |
Family
ID=8030701
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97117438A Ceased EP0837214A3 (fr) | 1996-10-18 | 1997-10-09 | Foreuse à percussion |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0837214A3 (fr) |
DE (1) | DE29618066U1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0978625A2 (fr) * | 1998-08-03 | 2000-02-09 | Hans-Philipp Walter | Foreuse à percussion |
DE102005015886A1 (de) * | 2005-04-06 | 2006-10-26 | Hans-Philipp Walter | Bohrhammer |
CN112901063A (zh) * | 2021-02-24 | 2021-06-04 | 重庆科技学院 | 一种射吸式钻井提速工具 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2477778C2 (ru) * | 2011-06-22 | 2013-03-20 | Государственное образовательное учреждение высшего профессионального образования Новосибирский государственный архитектурно-строительный университет (Сибстрин) | Пневматический ударный механизм |
RU2477362C1 (ru) * | 2011-06-23 | 2013-03-10 | Государственное образовательное учреждение высшего профессионального образования Новосибирский государственный архитектурно-строительный университет (Сибстрин) | Пневматический ударный механизм |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2705191A1 (de) | 1976-02-09 | 1977-08-11 | Reed Tool Co | Schlagbohrwerkzeug |
DE9202336U1 (de) | 1992-02-22 | 1992-05-07 | Walter, Hans-Philipp, 7102 Lehrensteinsfeld | Bohrhammer-Gerät |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3806407C2 (de) * | 1988-02-29 | 1995-08-31 | Keller Grundbau Gmbh | Vorrichtung zur Herstellung von durch Zugabe von Binde- oder Abdichtmitteln verdichteten Bodenabschnitten |
SK279150B6 (sk) * | 1990-11-09 | 1998-07-08 | Permon | Pneumatické ponorné vŕtacie náradie |
DE9319223U1 (de) * | 1993-12-15 | 1994-02-24 | Walter, Hans-Philipp, 74251 Lehrensteinsfeld | Bohrhammer |
US5562170A (en) * | 1995-08-30 | 1996-10-08 | Ingersoll-Rand Company | Self-lubricating, fluid-actuated, percussive down-the-hole drill |
-
1996
- 1996-10-18 DE DE29618066U patent/DE29618066U1/de not_active Expired - Lifetime
-
1997
- 1997-10-09 EP EP97117438A patent/EP0837214A3/fr not_active Ceased
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2705191A1 (de) | 1976-02-09 | 1977-08-11 | Reed Tool Co | Schlagbohrwerkzeug |
DE9202336U1 (de) | 1992-02-22 | 1992-05-07 | Walter, Hans-Philipp, 7102 Lehrensteinsfeld | Bohrhammer-Gerät |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0978625A2 (fr) * | 1998-08-03 | 2000-02-09 | Hans-Philipp Walter | Foreuse à percussion |
EP0978625A3 (fr) * | 1998-08-03 | 2001-06-06 | Hans-Philipp Walter | Foreuse à percussion |
DE102005015886A1 (de) * | 2005-04-06 | 2006-10-26 | Hans-Philipp Walter | Bohrhammer |
DE102005015886B4 (de) * | 2005-04-06 | 2008-06-19 | Hans-Philipp Walter | Bohrhammer |
CN112901063A (zh) * | 2021-02-24 | 2021-06-04 | 重庆科技学院 | 一种射吸式钻井提速工具 |
Also Published As
Publication number | Publication date |
---|---|
EP0837214A3 (fr) | 1999-12-08 |
DE29618066U1 (de) | 1996-12-19 |
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