WO2001018356A1 - Method of controlling a rock drilling machine - Google Patents

Method of controlling a rock drilling machine Download PDF

Info

Publication number
WO2001018356A1
WO2001018356A1 PCT/SE2000/001570 SE0001570W WO0118356A1 WO 2001018356 A1 WO2001018356 A1 WO 2001018356A1 SE 0001570 W SE0001570 W SE 0001570W WO 0118356 A1 WO0118356 A1 WO 0118356A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
rotation motor
temperature
drilling machine
drilling
Prior art date
Application number
PCT/SE2000/001570
Other languages
French (fr)
Inventor
Åke EKLÖF
Original Assignee
Atlas Copco Rock Drills Ab
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 Atlas Copco Rock Drills Ab filed Critical Atlas Copco Rock Drills Ab
Priority to AU66038/00A priority Critical patent/AU6603800A/en
Publication of WO2001018356A1 publication Critical patent/WO2001018356A1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (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)
  • Earth Drilling (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)

Abstract

In order to compensate for variations in idle losses in the rotation motor (7) one establishes a relation between idle pressure and temperature for the rotation motor. This relation is stored in the memory in a control unit (21). During drilling the temperature of the liquid passing the rotation motor (7) is measured. This value and said relation are used to determine a reference pressure corresponding to the idle losses in the rotation motor. The drilling is then controlled by the difference between the measured pressure of the liquid supplied to the rotation motor during drilling and said reference pressure.

Description

Method of controlling a rock drilling machine
The present invention relates to a method of controlling a rock drilling machine. More particularly the invention relates to controlling taking idling losses in the rock drilling machine into account.
In a previously known method where idling losses are considered, see WO 97/49896, the idle pressure in the feed line of the rotation motor is measured when the drill string is rotated with the drill bit out of contact with the rock. After that the drilling is controlled by the difference between the pressure measured during drilling and the idle pressure. A drawback with this method is the risk that the operator does not make the measurement of the idle pressure with all parameters correctly set. The following drilling will then not be performed with a suitable rotation torque.
The present invention, which is defined in the appended claim, aims at achieving a method of controlling the drilling machine where the above mentioned drawback is avoided in that for a given rock drilling machine it is determined how the idle pressure varies with the temperature. At the subsequent drilling a reference pressure is determined by the relation between the idle pressure and the temperature after which drilling is controlled by the difference between the pressure at the rotation motor and the reference pressure.
An embodiment of the invention is described below with reference to the accompanying drawings in which fig 1 schematically shows a hydraulic diagram for a rock drilling machine in which the present invention is used. Fig 2 shows the relation between idle pressure and temperature for three different rotation motors, which can be used in the present invention.
The rock drilling machine shown in the drawings comprises a motor 1 which drives a pump 2 with variable displacement and a motor 3 which drives a pump 4 with fixed displacement. From pump 2 pressure liquid is conducted through the line 8 to the impact device 5 of the rock drilling machine. Furthermore, pressure liquid is led from pump 2 through conduit 14 and valve 12 to a proportional directional valve 9 for controlling the feed motor 6 of the rock drilling machine. Valve 12 together with restrictions 10 and 11 form a pressure compensation, which is remotely controlled by a proportional pressure limiter 13 by means of which the feed pressure to the rock drilling machine is controlled. The pressure limiter 13 is arranged in a return conduit 15. From pump 4 pressure liquid is led through conduit 17 to a proportional directional valve 16 for controlling the rotation motor 7 of the rock drilling machine. A return conduit 18 leads from the proportional directional valve 16 to tank. In the feed line, during drilling, to the rotation motor 7 the pressure is sensed by means of a pressure sensor 19. In the return conduit the temperature is sensed by means of a temperature sensor 20. The temperature sensor can also be positioned in the pressure conduit. The pressure sensor 19 is by means of a conductor 22 connected to a control unit 21 for the rock drilling machine. Control unit 21 comprises a memory. The temperature sensor 20 is by means of a conductor 24 connected to the control unit 21. The proportional directional valves 9 and 16 are by means of conductors 27 and 23 connected to the control unit 21. Pump 2 with variable displacement is by means of a conductor 26 connected to the control unit 21. The proportional pressure limiter 13 is by means of a conduit 25 connected to the control unit 21.
In fig 2 relations between idle pressure and temperature are shown for three different rotation motors which can be used for rock drilling machines. The pressure is shown on the vertical scale and the temperature on the horizontal. When the rotation motor for the rock drilling machine has been chosen a relation between idle pressure and temperature like those in fig 2 is stored in the memory of control unit 21. During drilling the temperature of the liquid passing rotation motor 7 is measured. The value of the temperature is supplied to control unit 21. With the aid of the temperature value and the stored relation between idle pressure and temperature a reference pressure for the drilling is determined. During drilling the pressure of the liquid fed to rotation motor 7 is measured. Control unit 21 then controls the two proportional directional valves 9 and 16, pump 2 and the proportional pressure limiter 13. Through this impact device 5, rotation motor 7 and feed motor 6 are controlled so that efficient drilling is obtained without influence of variations in idle losses.

Claims

Claim:
1. Method for controlling a rock drilling machine according to which drilling is controlled based on the pressure in a pressure conduit at a liquid driven rotation motor (7), c h a r a c t e r i z e d in that a relation between idle pressure and temperature for the rotation motor (7) is stored in a memory in a control unit (21) for the rock drilling machine, that during drilling the temperature of the liquid passing the rotation motor (7) is measured, that said temperature is fed to the control unit (21), that a reference pressure for the drilling is determined with the aid of said temperature and said relation, that the pressure of the liquid supplied to the rotation motor (7) during drilling is measured and that the drilling is controlled by the difference between said pressure and said reference pressure.
PCT/SE2000/001570 1999-09-06 2000-08-11 Method of controlling a rock drilling machine WO2001018356A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU66038/00A AU6603800A (en) 1999-09-06 2000-08-11 Method of controlling a rock drilling machine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9903121-3 1999-09-06
SE9903121A SE517540C2 (en) 1999-09-06 1999-09-06 Procedure for controlling a rock drill

Publications (1)

Publication Number Publication Date
WO2001018356A1 true WO2001018356A1 (en) 2001-03-15

Family

ID=20416850

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2000/001570 WO2001018356A1 (en) 1999-09-06 2000-08-11 Method of controlling a rock drilling machine

Country Status (3)

Country Link
AU (1) AU6603800A (en)
SE (1) SE517540C2 (en)
WO (1) WO2001018356A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007003705A1 (en) * 2005-07-01 2007-01-11 Sandvik Mining And Construction Oy Arrangement for controlling pressure-fluid-operated drilling equipment
CN102996139A (en) * 2012-11-30 2013-03-27 中煤科工集团重庆研究院 Hydraulic control system of drill loader
WO2021016885A1 (en) * 2019-07-30 2021-02-04 广西恒日科技股份有限公司 Hydraulic control system for fully hydraulic wheel rock drill

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997049896A1 (en) * 1996-06-25 1997-12-31 Tamrock Oy Method and arrangement for controlling rock drilling
WO1997049895A1 (en) * 1996-06-25 1997-12-31 Tamrock Oy Method and arrangement for controlling feeding of rock drilling machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997049896A1 (en) * 1996-06-25 1997-12-31 Tamrock Oy Method and arrangement for controlling rock drilling
WO1997049895A1 (en) * 1996-06-25 1997-12-31 Tamrock Oy Method and arrangement for controlling feeding of rock drilling machine
SE511746C2 (en) * 1996-06-25 1999-11-15 Tamrock Oy Procedure and arrangement for control of rock drilling

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007003705A1 (en) * 2005-07-01 2007-01-11 Sandvik Mining And Construction Oy Arrangement for controlling pressure-fluid-operated drilling equipment
CN102996139A (en) * 2012-11-30 2013-03-27 中煤科工集团重庆研究院 Hydraulic control system of drill loader
WO2021016885A1 (en) * 2019-07-30 2021-02-04 广西恒日科技股份有限公司 Hydraulic control system for fully hydraulic wheel rock drill

Also Published As

Publication number Publication date
SE9903121D0 (en) 1999-09-06
SE517540C2 (en) 2002-06-18
SE9903121L (en) 2001-03-07
AU6603800A (en) 2001-04-10

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