US3822752A - Rock drill - Google Patents

Rock drill Download PDF

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Publication number
US3822752A
US3822752A US00229311A US22931172A US3822752A US 3822752 A US3822752 A US 3822752A US 00229311 A US00229311 A US 00229311A US 22931172 A US22931172 A US 22931172A US 3822752 A US3822752 A US 3822752A
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US
United States
Prior art keywords
tool holder
motor
hydraulic motor
hydraulic
pressure
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
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US00229311A
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English (en)
Inventor
R Montabert
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Individual
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Individual
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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
    • E21B3/00—Rotary drilling
    • E21B3/02—Surface drives for rotary drilling
    • 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

Definitions

  • the present invention relates to rock drills, ie to hammer drills or percussion hammers adapted to drill holes in hard materials such as rock and concrete and operating by percussion.
  • This tool rotation may be obtained either mechanically, for example by using a nut and ratchet system or a helical ramp system, or hydraulically by using a gear, vane or piston-type hydraulic motor.
  • rock drill operation should be characterized by a complete mutual dependency of these two actions.
  • rock drilling operations are carried out in very different rock formations, frequently of a heterogeneous nature, and the optimum power rating to be used in each device varies considerably during the drilling.
  • the resistant torque varies considerably, e.g. to 10 or 20 times the resistance encountered in homogeneous rock.
  • the percussion force must be reduced during high torque peaks in order not to torque component which ends up in jamming the drill steel into the heterogeneous material.
  • the present invention provides a rock drill or like percussion tool or hammer controlled completely by means of liquid under pressure, wherein the hydraulic motor performing the drill steel rotation and the hydraulic motor applying the blows thereto are mounted in series in a common hydraulic circuit comprising, upstream of these two motors, a regulator capable of maintaining at a constant value the pressure of the fluid supplied to both motors.
  • motor is used to designate not only a gear motor, vane motor or piston motor producing the drill steel rotation, but also the driven assembly provided for reciprocating the striker piston along a rectilinear path as required for applying successive rapid blows to said drill steel.
  • FIGS. 1 and 2 are diagrammatic sectional views of two embodiments.
  • the reference numerals designate: 1, the striker unit; 2, the chuck carrying the drill steel 3; and 4 the hydraulic motor comprising a shaft 5 driving the chuck 2 through reduction gears 6.
  • HPl designates the pressure of the liquid fluid at the inlet end of motor 4, and HP2 the fluid pressure at the exhaust or outlet of this motor.
  • the hydraulic motor 4 and the driven unit or striker 1 are mounted in series in a common hydraulic circuit, whereby the pressure at the inlet of the striker unit 1 is equal to the exhaust pressure of motor 4, i.e., HP2.
  • a pressure regulating valve 7 is inserted in the hydraulic circuit upstream of motor 4.
  • the function of this valve is to keep at a constant value the pressure HPl, i.e. the pressure at the inlet of motor 4.
  • HPl HP2 will also increase; but since HPl remains constant due to the presence of regulating valve 7, HP2 is reduced.
  • the force of striker 1 decreases accordingly as the resistant torque counteracting the motor 4 increases.
  • FIG. 2 differs from the structure of FIG. I in that the rock drill is supplied through two separate circuits, namely:
  • the motor 4 will thus operate with an output Q1, but the striker unit 1 operates with the sum of said outputs O1 and Q2.
  • the ratio of these outputs Q1 and O2 is immaterial, for example 50 percent and 50 percent.
  • the modified form of embodiment illustrated in FIG. 2 further differs from the structure shown in FIG. 1 in that the pressure regulator 7 of FIG. 1 is dispensed with and replaced by a pressure summing valve 8 inserted in circuits A and B upstream of motor 4 and striker unit 1.
  • the function of this valve is to keep at a constant value the sum of pressures I-IPl and I-IPIZ, so that any increment of I-lPl is attended automatically by a reduction of HPZ. Also in this case the force of striker unit 1 decreases when the resistant torque acting on motor 4 increases.
  • a rock drill comprising:
  • a first hydraulic motor operatively connected to said tool holder for rotating same
  • a second hydraulic motor operatively connected to said tool holder for imparting axial impacts thereto, said motors together forming a driver system for said tool holder, each of said hydraulic motors having an inlet and an outlet for hydraulic fluid traversing same;
  • a pressure regulator valve connected between said first conduit and a reservoir to maintain substantially constant the liquid pressure applied to at least part of said driver system; and, said pressure regulator valve draining one of said conduits directly to said reservoir upon the development of excess pressure in said first conduit.
  • a rock drill comprising:
  • a first hydraulic motor operatively connected to said tool holder for rotating same
  • a second hydraulic motor operatively connected to said tool holder for imparting axial impacts thereto, said motors together forming a driver system for said tool holder, each of said hydraulic motors having an inlet and an outlet for hydraulic fluid traversing same;
  • a pressure regulator connected to said first conduit to maintain substantially constant the liquid pressure applied to at least part of said driver system
  • said pressure regulator being a pressure relief valve connected to said first conduit.
  • a rock drill comprising:
  • a first hydraulic motor operatively connected to said tool holder for rotating same
  • a second hydraulic motor operatively connected to said tool holder for imparting axial impacts thereto, said motors together forming a driver system for said tool holder, each of said hydraulic motors having an inlet and an outlet for hydraulic fluid traversing same;
  • a pressure regulator connected to said first conduit to maintain substantially constant the liquid pressure applied to at least part of said driver system
  • said pressure regulator comprising a pres sure-adding buffer valve connected across said first and fourth conduits.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
US00229311A 1971-03-18 1972-02-25 Rock drill Expired - Lifetime US3822752A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7110059A FR2129276A5 (fi) 1971-03-18 1971-03-18

Publications (1)

Publication Number Publication Date
US3822752A true US3822752A (en) 1974-07-09

Family

ID=9073950

Family Applications (1)

Application Number Title Priority Date Filing Date
US00229311A Expired - Lifetime US3822752A (en) 1971-03-18 1972-02-25 Rock drill

Country Status (9)

Country Link
US (1) US3822752A (fi)
JP (1) JPS5245642B1 (fi)
AU (1) AU462593B2 (fi)
BR (1) BR7201572D0 (fi)
CA (1) CA975746A (fi)
DE (1) DE2208660C2 (fi)
FR (1) FR2129276A5 (fi)
GB (1) GB1386654A (fi)
ZA (1) ZA721312B (fi)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4006783A (en) * 1975-03-17 1977-02-08 Linden-Alimak Ab Hydraulic operated rock drilling apparatus
US4023626A (en) * 1975-03-17 1977-05-17 Oy Tampella Ab Self-adaptive hydraulic rock drill
US4157121A (en) * 1977-02-04 1979-06-05 Chicago Pneumatic Tool Co. Hydraulic powered rock drill
US4289209A (en) * 1978-08-08 1981-09-15 Oy Tampella Ab Impact device with fluid tool rotation motor
US4291771A (en) * 1978-06-20 1981-09-29 Societe D'etude Et De Construction De Machines Pour Toutes Industries S.E.C.O.M.A. Societe Anonyme Rotary percussion hydraulic drilling machine
US6119793A (en) * 1997-10-03 2000-09-19 Sig Rocktools Ag Rock drill
US7073607B2 (en) 2001-06-25 2006-07-11 Campbell Jr Paul B Operating system for hydraulic rock drill
US20100108381A1 (en) * 2007-04-11 2010-05-06 Jonas Sinnerstad Method and device for controlling at least one drilling parameter for rock drilling
FR2964691A1 (fr) * 2010-09-13 2012-03-16 Montabert Roger Appareil rotopercutant hydraulique destine a la perforation de trous de mine

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI56052C (fi) * 1975-01-16 1979-11-12 Tampella Oy Ab Hydraulisk bergborrmaskin
FR2547347B1 (fr) * 1983-06-10 1985-09-06 Ts P Konstruktors Machine miniere de forage avec mecanismes de rotation et de percussion a commandes independantes
FI78158C (fi) * 1986-05-09 1989-06-12 Tampella Oy Ab Anordning vid en borrmaskin foer lagring av ett rotationsstycke.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1146870A (en) * 1914-06-08 1915-07-20 Charles H Haeseler Drilling-machine.
US1372914A (en) * 1918-05-11 1921-03-29 Ingersoll Rand Co Automatic valve for independent-rotation drills
US1436638A (en) * 1920-09-04 1922-11-28 Ingersoll Rand Co Air-feed control for rock drills
GB1056946A (en) * 1964-11-17 1967-02-01 Beteiligungs & Patentverw Gmbh Hydraulically operated rotary-percussive hammer drill
US3406763A (en) * 1966-09-19 1968-10-22 Ingersoll Rand Co Rock drill

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1146870A (en) * 1914-06-08 1915-07-20 Charles H Haeseler Drilling-machine.
US1372914A (en) * 1918-05-11 1921-03-29 Ingersoll Rand Co Automatic valve for independent-rotation drills
US1436638A (en) * 1920-09-04 1922-11-28 Ingersoll Rand Co Air-feed control for rock drills
GB1056946A (en) * 1964-11-17 1967-02-01 Beteiligungs & Patentverw Gmbh Hydraulically operated rotary-percussive hammer drill
US3406763A (en) * 1966-09-19 1968-10-22 Ingersoll Rand Co Rock drill

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4006783A (en) * 1975-03-17 1977-02-08 Linden-Alimak Ab Hydraulic operated rock drilling apparatus
US4023626A (en) * 1975-03-17 1977-05-17 Oy Tampella Ab Self-adaptive hydraulic rock drill
US4157121A (en) * 1977-02-04 1979-06-05 Chicago Pneumatic Tool Co. Hydraulic powered rock drill
US4291771A (en) * 1978-06-20 1981-09-29 Societe D'etude Et De Construction De Machines Pour Toutes Industries S.E.C.O.M.A. Societe Anonyme Rotary percussion hydraulic drilling machine
US4289209A (en) * 1978-08-08 1981-09-15 Oy Tampella Ab Impact device with fluid tool rotation motor
US6119793A (en) * 1997-10-03 2000-09-19 Sig Rocktools Ag Rock drill
US7073607B2 (en) 2001-06-25 2006-07-11 Campbell Jr Paul B Operating system for hydraulic rock drill
US20100108381A1 (en) * 2007-04-11 2010-05-06 Jonas Sinnerstad Method and device for controlling at least one drilling parameter for rock drilling
US8091652B2 (en) 2007-04-11 2012-01-10 Atlas Copco Rock Drills Ab Method and device for controlling at least one drilling parameter for rock drilling
FR2964691A1 (fr) * 2010-09-13 2012-03-16 Montabert Roger Appareil rotopercutant hydraulique destine a la perforation de trous de mine
WO2012089949A1 (fr) * 2010-09-13 2012-07-05 Montabert Appareil rotopercutant hydraulique destiné à la perforation de trous de mine
US9194182B2 (en) 2010-09-13 2015-11-24 Montabert Hydraulic rotary percussive device intended to drill boreholes

Also Published As

Publication number Publication date
AU3990672A (en) 1973-09-13
GB1386654A (en) 1975-03-12
DE2208660B1 (de) 1973-06-20
AU462593B2 (en) 1975-06-05
FR2129276A5 (fi) 1972-10-27
BR7201572D0 (pt) 1973-06-14
DE2208660C2 (de) 1975-08-21
ZA721312B (en) 1972-11-29
DE2208660A1 (fi) 1973-06-20
JPS5245642B1 (fi) 1977-11-17
CA975746A (en) 1975-10-07

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