EP0627543A2 - Erdbohrer mit Imlochhammer - Google Patents

Erdbohrer mit Imlochhammer Download PDF

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Publication number
EP0627543A2
EP0627543A2 EP94303286A EP94303286A EP0627543A2 EP 0627543 A2 EP0627543 A2 EP 0627543A2 EP 94303286 A EP94303286 A EP 94303286A EP 94303286 A EP94303286 A EP 94303286A EP 0627543 A2 EP0627543 A2 EP 0627543A2
Authority
EP
European Patent Office
Prior art keywords
compressed air
screw shaft
down hammer
fluid
bit body
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.)
Withdrawn
Application number
EP94303286A
Other languages
English (en)
French (fr)
Other versions
EP0627543A3 (de
Inventor
Jeon Jin Mo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kencho Kobe Co Ltd
Original Assignee
Kencho Kobe Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kencho Kobe Co Ltd filed Critical Kencho Kobe Co Ltd
Publication of EP0627543A2 publication Critical patent/EP0627543A2/de
Publication of EP0627543A3 publication Critical patent/EP0627543A3/de
Withdrawn legal-status Critical Current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
    • 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
    • E21B15/00—Supports for the drilling machine, e.g. derricks or masts
    • 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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/02—Swivel joints in hose-lines
    • 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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/12—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using drilling pipes with plural fluid passages, e.g. closed circulation systems
    • 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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/14—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using liquids and gases, e.g. foams
    • 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
    • E21B4/20—Drives for drilling, used in the borehole combined with surface drive

Definitions

  • the present invention relates to an underground borer with a down hammer and more particularly to an underground borer in which a fluid jetting pipe is arranged centrally of a down hammer of the borer so that fluid may be discharged. along with compressed air, from the bottom portion of a bit body to the outside of the borer.
  • a conventional underground borer with down hammer or a method of construction using the same is disclosed in Japanese Patent Application Laid-open No. Sho 55-119885 wherein a hammer excavating head is coupled to a ram of an oil pressure cylinder suspended so as to be free to ascend and descend. a circuit for feeding pressurized oil is connected to the oil pressure cylinder and that circuit is connected with a high pressure relief valve and with a low pressure relief valve through a switching valve. whereby by determining setting pressures of the two relief valves to proper values, ground pressure received by a spiking bit can be adjusted to a value which allows the spiking bit to move vertically.
  • a technique is disclosed in Japanese Utility Model Application Laid-open No.
  • Sho 55-113786 wherein an air hammer having a spiking bit attached to the fore end of a screw auger is mounted on its outer periphery with a spiral screw blade whose diameter is increased upwardly gradually and the screw blade is mounted with an excavating cutting edge, whereby even with a small-diametered or size-reduced air hammer, a hole of a large diameter can be excavated.
  • a method of construction for boring has also been known as disclosed in Japanese Patent Application Laid-open No. Sho 55-23272.
  • a nozzle having a check valve directed laterally is disposed in the lower end of the drill pipe so that as excavation effected by the borer proceeds. mortar or the like is blown from the nozzle against a bored hole wall so as to be forcibly deposited thereon.
  • An aim of the present invention is to alleviate the above disadvantages of the conventionally known underground borers and more specifically, it is an aim of the present invention to provide an underground borer with down hammer which can improve the durability of a bit body used for a down hammer and which can reduce powdery dirts and noises.
  • Another aim of the present invention is to provide a unit of supplying fluid used for the underground borer with down hammer and capable of perfecting the periphery of a hole which is apt to collapse.
  • An underground borer with down hammer basically has a vehicle body, a guide still standing on the vehicle body, and a rotary machine having its bottom coupled with a screw shaft and a down hammer, wherein a supply unit is interposed between the rotary machine and the screw shaft, a fluid conduit is formed centrally of the screw shaft, compressed air conduits are formed to surround the fluid conduit, and a fluid jetting pipe in communication with the fluid conduit is arranged centrally of the down hammer to extend, preferably, until the inside of a bit body whereby fluid is discharged along with compressed air from the bottom portion of the bit body to the outside of the borer.
  • the kind of fluid used in the present invention by being supplied to the fluid conduit is not particularly limited and may be water, cement milk, bentonite or mortar.
  • flanges are coupled to upper and lower portions of a rotary member so as to permit the rotary member to be connected between the rotary machine and the screw shaft, an annular member is applied around the outer periphery of the rotary member, bearings are attached to upper and lower portions of the annular member caps and are fixed by means of screw bolts and a semicircular annular groove formed in a middle part of contact surface of the rotary member faces a semicircular annular groove formed in a middle part of contact surface of the annular member, the one annular groove being in communication with a compressed air supply source and the other annular groove being in communication with the compressed air conduits formed in the screw shaft.
  • Fig.2 is an enlarged partial sectional view showing a portion A of Fig.1.
  • Fig. 3 is a cross-sectional view on line III - III of Fig. 2.
  • Fig.4 is an enlarged longitudinal sectional view of a hammer illustrated at a portion C in Fig.1.
  • a guide stilt 2 stands upright in front of a vehicle body 1.
  • a screw shaft 3 and a rotary machine 4 operated by a generator G to rotate the screw shaft are disposed along the guide stilt 2. and a down hammer B formed with screw blades is connected to the bottom of the screw shaft 3.
  • a supply unit 5 capable of supplying compressed air from an air compressor C to the screw shaft 3.
  • the screw shaft 3 is formed, at its central portion, with a fluid conduit 6 for supplying water received from a water supplier S through the rotary machine 4 to the down hammer B and with compressed air conduits 7 and 7' for supplying compressed air received from the air compressor C through the supply unit 5 to the down hammer 8.
  • the down hammer B is a conventionally known one including an outer sleeve 31A having its periphery provided with screw blades 30, a check valve 32 adapted to make and break the supply of compressed air fed from the compressed air conduits 7 and 7' a piston 33 operated by compressed air, an inner sleeve 31B for guiding compressed air to the working surface of the piston 33, a bit body 9 disposed at the fore end of the piston 33 and a compressed air jetting conduit 10 by which central portions of the piston 33 and bit body 9 communicate with each other, but it has a structure specific to the present invention in the following points.
  • a fluid jetting pipe 8 passing through an opening 34 formed in the check valve 32 runs through a central portion of the down hammer B to extend in the compressed air jetting conduit 10 until the inside of the bit body 9.
  • a plurality of compressed air supply conduits 36 and 36' are formed in an upper portion of the down hammer B to surround the fluid jetting pipe 8 and downstream fore ends of the supply conduits 36 and 36' join at a portion above the check valve 32 to form an annular supply conduit 37.
  • the check valve 32 is urged to abut against the downstream end of the annular supply conduit 37.
  • the fluid conduit 6 formed in the screw shaft 3 is in communication with the fluid jetting pipe 8 formed in the down hammer B, thereby establishing a liquid supply passage.
  • the compressed air conduits 7 and 7' formed in the screw shaft 3 are also in communication with the compressed air supply conduits 36 and 36' formed in the down hammer B, thus ending in the compressed air jetting conduit 10.
  • water jetting out of a lower end 35 of the fluid jetting pipe 8 cooperates with compressed air discharged from the compressed air jetting conduit 10 to the periphery of the water to cause a water jet phenomenon and under this condition, water and compressed air jet out all together from the bottom of the bit body 9.
  • the supply unit 5 has a rotary member 11 having its upper and lower portions coupled to flanges 12 and 12', respectively, by means of keys.
  • the upper flange 12 is connected to a flange 13 on the side of the rotary machine 4 and the lower flange 12' is connected to a flange 13' on the side of the screw shaft 3.
  • An annular member 14 is set between the upper and lower flanges 12 and 12' and ring-shaped caps 16 and 16' are fixed by means of bolts 17 and 17' through bearings 15 and 15 ' arranged on upper and lower portions of the annular member 14. Through this, the annular member 14 can be prevented from rotating even when the rotary member 11 rotates.
  • a semicircular annular groove 18 formed in a middle part of contact surface of the rotary member 11 faces a semicircular annular groove 18' formed in a middle part of contact surface of the annular member 14, and the one annular groove 18 communicates with the compressed air conduits 7 and 7' formed in the screw shaft 3 and the other annular groove 18' communicates with an inlet/outlet port 19 connected to the air compressor C serving as a supply source of compressed air.
  • seal materials such as rubber rings which act to prevent leakage of compressed air.
  • the rotary machine 4 and the down hammer B are operated to proceed with excavation work and when a rigid stratum or rock bed is reached, water is supplied from the water supplier S to the fluid conduit 6 formed centrally of the screw shaft 3. Supplied water then reaches the down hammer B and is caused to jet out of the lower end 35 of the fluid jetting pipe 8.
  • a jet of water mixes there with compressed air running down in the compressed air jetting conduit 10 and used to drive the piston 33 of down hammer B and the bit body 9, causing a water jet phenomenon, and is blown off vigorously downwardly of the bit body 9.
  • cement milk instead of suppling water through the fluid supply conduit 6 as described previously, cement milk, bentonite or mortar may be supplied.
  • the jetting pipe 8 is described as extending through the compressed air jetting conduit 10 until its fore end reaches the inside of the bit body 9, it is not always necessary that the fore end of the liquid jetting pipe 8 extend until the inside of the bit body 9 and the intended purpose can be accomplished if the fore end of the fluid jetting pipe lies inside the compressed air jetting conduit 10 formed in the down hammer 10, for example, at a portion inside the piston 33 operated by compressed air.

Landscapes

  • 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)
EP94303286A 1993-06-01 1994-05-06 Erdbohrer mit Imlochhammer. Withdrawn EP0627543A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR9401593 1993-06-01
KR930094015 1993-06-01

Publications (2)

Publication Number Publication Date
EP0627543A2 true EP0627543A2 (de) 1994-12-07
EP0627543A3 EP0627543A3 (de) 1995-08-02

Family

ID=19375210

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94303286A Withdrawn EP0627543A3 (de) 1993-06-01 1994-05-06 Erdbohrer mit Imlochhammer.

Country Status (1)

Country Link
EP (1) EP0627543A3 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997034070A1 (de) * 1996-03-13 1997-09-18 Wirth Maschinen- und Bohrgeräte-Fabrik GmbH Vorrichtung zur herstellung eines erdlochs
DE10005941A1 (de) * 2000-02-10 2001-10-25 Bauer Spezialtiefbau Imlochhammerschnecke mit Betonierrohr

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB609633A (en) * 1946-03-19 1948-10-05 Padley & Venables Ltd Improvements in water connections for coal, rock, and like drilling tools
US3061024A (en) * 1958-06-11 1962-10-30 Ingersoll Rand Co Water tube construction for down-the-hole drills
US3198267A (en) * 1963-05-17 1965-08-03 United States Steel Corp Method and apparatus for controlling dust in a rotary drilling operation
EP0168368A1 (de) * 1984-07-12 1986-01-15 Atlas Copco Aktiebolag Steuerung und Steuerungsvorrichtung für einen Im-Loch-Bohrhammer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB609633A (en) * 1946-03-19 1948-10-05 Padley & Venables Ltd Improvements in water connections for coal, rock, and like drilling tools
US3061024A (en) * 1958-06-11 1962-10-30 Ingersoll Rand Co Water tube construction for down-the-hole drills
US3198267A (en) * 1963-05-17 1965-08-03 United States Steel Corp Method and apparatus for controlling dust in a rotary drilling operation
EP0168368A1 (de) * 1984-07-12 1986-01-15 Atlas Copco Aktiebolag Steuerung und Steuerungsvorrichtung für einen Im-Loch-Bohrhammer

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997034070A1 (de) * 1996-03-13 1997-09-18 Wirth Maschinen- und Bohrgeräte-Fabrik GmbH Vorrichtung zur herstellung eines erdlochs
EP0928876A1 (de) * 1996-03-13 1999-07-14 Wirth Maschinen- und Bohrgeräte-Fabrik GmbH Vorrichtung zur Herstellung eines Erdlochs
AU722803B2 (en) * 1996-03-13 2000-08-10 Wirth Maschinen- Und Bohrgerate-Fabrik Gmbh Device for drilling a bore hole in the ground
US6102139A (en) * 1996-03-13 2000-08-15 Wirth Maschinen- Und Bohrgerate-Fabrik Gmbh Device for drilling a bore hole in the ground
DE10005941A1 (de) * 2000-02-10 2001-10-25 Bauer Spezialtiefbau Imlochhammerschnecke mit Betonierrohr
DE10005941C2 (de) * 2000-02-10 2002-02-21 Bauer Spezialtiefbau Imlochhammerschnecke mit Betonierrohr

Also Published As

Publication number Publication date
EP0627543A3 (de) 1995-08-02

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