WO2003050382A1 - Mat d'avancement et element hydraulique - Google Patents

Mat d'avancement et element hydraulique Download PDF

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Publication number
WO2003050382A1
WO2003050382A1 PCT/FI2002/000989 FI0200989W WO03050382A1 WO 2003050382 A1 WO2003050382 A1 WO 2003050382A1 FI 0200989 W FI0200989 W FI 0200989W WO 03050382 A1 WO03050382 A1 WO 03050382A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
pressure
feeding beam
hydraulic element
pressure space
Prior art date
Application number
PCT/FI2002/000989
Other languages
English (en)
Inventor
Janne Voimanen
Original Assignee
Sandvik Tamrock Oy
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 Sandvik Tamrock Oy filed Critical Sandvik Tamrock Oy
Priority to AU2002346777A priority Critical patent/AU2002346777B2/en
Publication of WO2003050382A1 publication Critical patent/WO2003050382A1/fr
Priority to SE0401441A priority patent/SE526167C2/sv

Links

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
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
    • E21B19/086—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods with a fluid-actuated cylinder
    • 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
    • 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

Definitions

  • the invention relates to a feeding beam of a rock drilling apparatus, comprising at least a first part of the feeding beam and a second part of the feeding beam, a transfer apparatus for extending and shortening the feeding beam by moving said feeding beam parts with respect to each other in the longitudinal direction, and a feeding apparatus for moving a rock drilling machine in the longitudinal direction of the feeding beam, supported by the first feeding beam part.
  • the invention also relates to a hydraulic element.
  • a drilling beam of a rock drilling apparatus is provided with a telescopic feeding beam, the length of which can be extended and shortened depending on the length of holes to be drilled, for instance.
  • WO publication 95/18913 discloses a telescopic feeding beam with two feeding beam parts, i.e. a lower beam and an upper beam, arranged one on the other.
  • the lower beam and the upper beam are moved with respect to each other in the longitudinal direction by means of a transfer cylinder.
  • a rock drilling machine is also moved by means of a feed cylinder on the upper beam.
  • the feeding beam is driven to its maximum length and the rock drilling machine, for its part, is driven to the back part of the feeding beam.
  • the rock drilling machine is moved towards the front part of the feeding beam and simultaneously the feeding beam is shortened.
  • the feeding beam is provided with electric sensors to control its longitudinal position and also with electric sensors indicating the moment the rock drilling machine reaches the front end of the feeding beam. Nevertheless, it has turned out that electric sensors get easily damaged in severe mining conditions, due to vibration and impurities, for instance.
  • the feeding beam of the invention is characterized in: that the feeding beam comprises a hydraulic element which is arranged at the front end of the first part of the feeding beam, immovably with respect to the first part; that the hydraulic element comprises a pressure space where a predetermined pressure of pressure fluid acts by means of a pressure channel, and a first piston and a second piston, which are arranged on the same axis and the first ends of which are arranged inside the pressure space and the second ends of which extend outside the pressure space; that the feeding beam comprises a first counter surface and a second counter surface, whereby the first counter surface is arranged to move proportionately to a feed movement produced by the feeding apparatus and the second counter surface is arranged to move proportionately to a feed movement produced by the transfer apparatus; that the first counter surface is arranged to affect one piston of the hydraulic element when the rock drilling machine is driven to a predetermined position with respect
  • the hydraulic element of the invention is characterized in that the hydraulic element comprises a frame, a pressure space inside the frame, a connection from the pressure space to a pressure channel, and a first piston and a second piston; that the first piston and the second piston are arranged on the same axis, that the first ends of the pistons are arranged in the pressure space, and that the second ends of the pistons extend outside the frame; that the pressure space comprises a sleeve-like section, which is on the same axis with the pistons and movable in the axial direction in the pressure space; that the front end of the first piston is arranged immovably at one end of the sleevelike section; that the front end of the second piston is arranged inside the sleeve-like section; that the first piston and the second piston are dimensioned and arranged in the pressure space such that when only one piston is pushed towards the pressure space at a time, both pistons and the sleeve-like section are arranged to move in the direction of said pushing motion in the
  • the essential idea of the feeding beam of the invention is that the front part of the first part of the feeding beam which can be extended and shortened telescopically is provided with a hydraulic element, which monitors the feed movement performed by the feeding apparatus and the feed movement performed by the transfer apparatus.
  • both the feeding apparatus and the transfer apparatus have performed a predetermined feed movement, they affect the pistons in the hydraulic element by means of suitable counter surfaces.
  • the front ends of the pistons are arranged in the pressure space of the hydraulic element, whereby the pushing of both pistons into the pressure space causes the pressure space volume to decrease. Consequently, the pressure of the pressure fluid in the pressure space rises.
  • the pressure space is further connected to a pressure channel, which comprises pressure fluid in which a pressure pulse is produced.
  • the advantage of the feeding beam of the invention is that it provides a reliable hydraulic indication that the desired feed movements have actually been performed. It is simple to extend the pressure channel to the base of the rock drilling apparatus, whereby the electric sensor to be arranged in the pressure channel can be placed onto the base where it has a better protection from vibration and impurities than in the feeding beam. As no electric sensors sensitive to failures need to be used in the feeding beam, a more reliable rock drilling apparatus is achieved.
  • the hydraulic element comprises a frame and a pressure space formed inside the frame.
  • the element also comprises a first piston and a second piston arranged on the same axis and the first ends of which are arranged in the pressure space and the second ends of which extend outside the frame.
  • the element further comprises a sleeve-like section which is arranged in the pressure space so that it can be moved in the axial direction.
  • the first end of the first piston is attached immovably to the sleevelike section.
  • the first end of the second piston for its part, is arranged movably inside the sleeve-like section.
  • Between the first ends of the first piston and the second piston there is preferably a middle piece which can transmit a predetermined pushing force between the pistons but which, if the predetermined force is exceeded, allows the first piston and the second piston to move closer to each other.
  • both pistons and the sleeve-like section move in the same direction in the pressure space, and the pressure space volume does not change. To achieve a pressure pulse, it is necessary that forces affect both elements.
  • the hydraulic element of the invention can thus be applied like an AND element which is known from the field of electric components. Compared with corresponding electric components, the hydraulic component is,. however, substantially more durable. Therefore, it can also be used in very demanding conditions, such as mines, explosive surroundings and under water.
  • Figure 1 is a schematic side view of a feeding beam of the invention in the starting position of drilling
  • Figure 2 is a schematic side view of the feeding beam of Figure 1 in the end position of drilling
  • Figure 3 schematically shows a hydraulic element of the invention cut open, when a piston arrangement of the element has moved to its extreme position on the left due to a force affecting from the right
  • Figure 4 schematically shows the hydraulic element of Figure 3 cut open, when the piston arrangement is simultaneously affected by a force from the right and a force from the left
  • Figure 5 schematically shows a hydraulic element of the invention cut open, when the piston arrangement has moved to its extreme position on the right due to a force affecting from the left.
  • Figure 1 shows a possible construction of a telescopic feeding beam
  • the feeding beam 1 is typically arranged at the free end of a drilling beam 2 of a rock drilling apparatus by means of a cradle 3 or the like. In some cases, the feeding beam 1 can, however, be arranged directly on a base of the rock drilling apparatus.
  • the feeding beam 1 comprises a base beam, i.e. a first part 1 a and an extension beam, i.e. a second part 1 b.
  • a transfer apparatus 4 illustrated by a broken line in Figures 1 and 2 the parts 1a and 1b of the feeding beam can be moved with respect to each other so that the feeding beam 1 can be extended and shortened.
  • the transfer apparatus 4 is preferably a hydraulic cylinder, but any other suitable apparatus can also be applied.
  • a rock drilling machine 5 is supported to the first part 1a of the feeding beam by means of a carriage 6 or directly by its own frame structure.
  • the rock drilling machine 5 can be moved in the longitudinal direction of the first part 1a by a feeding apparatus 7 illustrated by a broken line in the figure.
  • the feeding apparatus 7 typically comprises a hydraulic cylinder, an idle wheel connected to the hydraulic cylinder and cables, chains or corresponding transmission means transmitting the feed movement to the rock drilling machine.
  • the feeding apparatus 7 is greatly simplified for the sake of clarity.
  • the feed movement that the rock drilling machine 5 performs with respect to the rock to be drilled is produced by means of the feeding apparatus 7 and the transfer apparatus 4.
  • the front part of the first part 1a of the feeding beam is provided with a hydraulic element 8, which detects the moment the feed movements of the feeding beam 1 are finished.
  • the hydraulic element 8 comprises two pistons 19, 20, the simultaneous movement of which effects a change in the volume of the element's 8 pressure space, which is connected to a pressure channel 15. The change in the pressure space volume is detected in the pressure channel as a pressure pulse.
  • the feeding beam 1 is in the starting position of drilling, whereby the rock drilling machine 5 is driven to a rear position and the second part 1b of the feeding beam is driven to its front position.
  • the rock drilling machine 5 is moved towards the front end of the first part 1a of the feeding beam.
  • the foremost extreme position is shown by a broken line 9 in Figure 1.
  • a first counter surface 11 arranged in the carriage 6 of the rock drilling machine 5 and shown by a broken line has affected the first piston 19 of the hydraulic element 8, but since the second piston 20 of the element 8 is still free, no pressure pulse is produced in the pressure channel 13.
  • the drilling is thus continued by feeding the drilling machine 5 towards the rock by means of the transfer apparatus 4.
  • the first counter surface 11 thus affects the first piston 19 of the hydraulic element 8, and the second counter surface 12 arranged at the front part of the second part 1b of the feeding beam simultaneously affects the second piston 20 of the element 8.
  • the combined effect of the pistons 19, 20 thus effects a volume change in the pressure space of the hydraulic element 8, which, for its part, produces a pressure pulse in the pressure channel 13 leading to the element 8.
  • the pressure pulse is detected by a sensor 14 arranged in the pressure channel 13.
  • the information is transmitted further to a control unit 15, which concludes, on the basis of the pressure pulse, that the feed movement has been performed and the drilling is finished.
  • the feeding beam is again driven to the position according to Figure 1 and the drilling is continued by drilling a new hole.
  • the drill shank is detached from the drill rod in the hole, the feeding beam 1 is driven to the position according to Figure 1 , an extension rod is introduced and the drilling of the drill hole in question is continued.
  • the first counter surface 11 can be arranged directly at the rock drilling machine 5, the carriage 3 or in connection with the feeding apparatus 7, and the second counter surface 12 can be arranged, for instance, in connection with a supporting bearing at the front end of the feeding beam 1.
  • the counter surfaces 11 and 12 are preferably separate objects, the position of which can be changed with respect to the hydraulic element 8, if necessary.
  • the feed movement performed by the transfer apparatus 4 and/or the feeding apparatus 7 can thus be restricted to be shorter than the maximum length. It is furthermore obvious to a person skilled in the art that the construction of the telescopic feeding beam 1 can also be different from the construction simplified in Figures 1 and 2.
  • the feeding beam comprises at least two feeding beam parts, which can be moved with respect to each other in the longitudinal direction in order to change the length of the feeding beam, forming part of the feed movement of the rock drilling machine. Furthermore, the rock drilling machine 5 is supported to a feeding beam 1 part, in the longitudinal direction of which it can be moved.
  • the hydraulic element 8 shown in Figure 3 comprises a frame 16, inside of which there is a pressure space 24 closed by a cover 17.
  • the element 8 also comprises a first piston 19 and a second piston 20 which can be moved with respect to the frame 16, which are on the same axis and the opposite ends of which are in said pressure space 24.
  • Rods 19a and 20a of the pistons 19 and 20 are substantially equally large in cross-section and they are sealed to the frame 16 and the cover 17, respectively.
  • the pressure space 24 also comprises a sleeve-like section 21 , which is dimensioned so that it can move in the axial direction in the pressure space 24.
  • the sleeve-like section 21 is supported to the inner surface of the pressure space 24 by means of sliding pieces, for instance.
  • the end 22 of the first piston 19 is attached to the sleeve-like section 21 , whereby the first piston 19 and the sleeve-like section 21 are arranged to move together.
  • the sleeve-like section 21 can also be formed at the end of the first piston 19.
  • the second piston 20 is a separate piece, the end 23 of which is slidably arranged inside the sleeve-like section 21.
  • An equal pressure acts in the pressure space 24 defined by the frame 16 and the cover 17, because there is a clearance between the sleeve-like section 21 and the inner surface of the frame 16, and a space 25 between the end surfaces of the pistons 19, 20 is connected via clearances and channels to the rest of the pressure space 24.
  • a middle piece 26 which is a compressible element, such as a pushing spring or an elastic stick, which is capable of transmitting axial forces between the pistons 19, 20, but which middle piece 26 is arranged, due to a pushing force greater than predetermined, to shorten and to allow the pistons 19, 20 to move towards each other as in Figure 4.
  • the middle piece 26 can be stiff.
  • the middle piece 26 keeps the distance between the pistons 19, 20 substantially constant.
  • the first piston 19 of the hydraulic element 8 is affected by force F-i, which has moved the first piston 19 and the sleeve-like section 21 attached to it to the extreme position on the left, i.e. against the cover 17.
  • the second piston 20 can move freely in the axial direction.
  • the first piston 19 moves to the left in the figure, it pushes, by means of the middle piece 26, the second piston 20 substantially the same distance to the left. Force required for pushing the second piston 20 is relatively small, and so the middle piece 26 is not substantially compressed, but the distance between the pistons 19, 20 remains unchanged.
  • the first piston 19, the sleeve-like section 21 and the second piston 20 move as a whole to the second extreme position, it does not cause a volume change in the pressure space 24, because the cross- sectional areas of the piston 19, 20 rods 19a, 20a are dimensioned to be substantially equally large. As the proportion of the first piston 19 in the pressure space 24 increases, the proportion of the second piston 20 thus decreases. Since the volume does not change in the pressure space, no pressure pulse is produced in the pressure channel 13.
  • the first piston 19 is still affected by force Fi, which keeps the sleeve-like section 21 in its extreme position on the left.
  • the second piston 20 is affected by force F 2 in the opposite direction, pushing the second piston 20 towards the first piston 19. Due to forces Fi and F 2 , the middle piece 26 is compressed, allowing the second piston 20 to move closer to the first piston 19.
  • the proportion of the second piston 20 in the pressure space 24 increases. Since the proportion of the first piston 19 in the pressure space 24 remains constant, the movement of the second piston 20 causes the volume of the pressure space 24 to decrease and the pressure to rise.
  • a formed pressure pulse is detected by a sensor 14, which is arranged in the pressure channel 13 in connection with the pressure space 24.
  • the senor 14 can be situated, for instance, on the base of the rock drilling apparatus where it is easier to provide it with effective protection against vibration and impurities. Since a control unit 15 is also typically arranged on the base of the rock drilling apparatus, the electric signal can be led simply and undisturbed from the sensor 14 to the control unit 15.
  • Figure 4 also shows a pump 27 by which a continuous, substantially constant hydraulic pressure of 5 bars, for instance, is fed along the pressure channel 13 to the pressure space 24.
  • the pressure space 24 is constantly filled with hydraulic fluid.
  • the pump 27 can be replaced by a pressure accumulator or other pressure source.
  • the pressure channel 13 is further connected to a pressure relief valve 28 allowing as much hydraulic fluid as corresponds to the change of the pressure space 24 volume to pass to the tank 29 when both pistons 19, 20 of the element 8 are moved towards the pressure space 24.
  • the second piston 20 is affected by force F 2 , which pushes the second piston 20 a predefined travel distance towards the first piston 19. Since the first piston 19 is not supported, the middle piece 26 pushes it and the sleeve-like section 21 to the extreme position on the right. Since the relative distance between the pistons 19, 20 does not substantially change during the movement, it means that the volume of the pressure space 24 does not change either. If force Fi is simultaneously directed to the first piston 19, the first piston 19 and the sleeve-like section 21 are pushed to the extreme position on the left, which is shown above in Figure 4. The movement of the first piston 19 to the position shown in Figure 4 makes the pressure rise in the pressure space 24, because the rod 19a of the first piston 19 removes hydraulic fluid when pushing into the pressure space 24.
  • the hydraulic element of the invention can naturally be applied not only in the feeding beam of the rock drilling apparatus but also elsewhere.
  • the element of the invention can be arranged at any object in connection of which it is necessary to observe whether forces acting in two opposite directions are implemented simultaneously.
  • the drawings and the related description are only intended to illustrate the idea of the invention. In its details, the invention can be modified within the scope of the claims.

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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)

Abstract

L'invention concerne le mât d'avancement d'un appareil de forage de roches et un élément hydraulique. La partie frontale de la première partie (1a) d'un mât télescopique d'avancement (1) est équipée d'un élément hydraulique (8) conçu de façon à produire une impulsion de pression dans un canal de pression (13) si un appareil de forage de roches (5) est amené en position frontale, et si une seconde partie (1b) du mât d'avancement est simultanément amenée en position arrière. L'élément hydraulique (8) comprend deux pistons (19, 20) disposés sur le même axe, ces pistons étant simultanément poussés dans un espace de pression (24) de l'élément hydraulique (8) et agencés de façon à produire un changement de volume dans l'espace de pression (24). Le changement de volume provoque une impulsion de pression qui est enregistrée.
PCT/FI2002/000989 2001-12-05 2002-12-04 Mat d'avancement et element hydraulique WO2003050382A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2002346777A AU2002346777B2 (en) 2001-12-05 2002-12-04 Feeding beam and hydraulic element
SE0401441A SE526167C2 (sv) 2001-12-05 2004-06-07 Matarbalk och hydrauliskt element

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20012407 2001-12-05
FI20012407A FI20012407A (fi) 2001-12-05 2001-12-05 Syöttöpalkki ja hydraulinen elementti

Publications (1)

Publication Number Publication Date
WO2003050382A1 true WO2003050382A1 (fr) 2003-06-19

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ID=8562427

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2002/000989 WO2003050382A1 (fr) 2001-12-05 2002-12-04 Mat d'avancement et element hydraulique

Country Status (4)

Country Link
AU (1) AU2002346777B2 (fr)
FI (1) FI20012407A (fr)
SE (1) SE526167C2 (fr)
WO (1) WO2003050382A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023249518A1 (fr) * 2022-06-20 2023-12-28 Epiroc Rock Drills Aktiebolag Procédé et agencement de stabilisation d'un système d'alimentation d'un équipement de travail d'exploitation minière ou de construction

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3381761A (en) * 1964-10-14 1968-05-07 Atlas Copco Ab Automatic rock drilling means
FI97419B (fi) * 1993-09-20 1996-08-30 Tamrock Oy Sovitelma kallionporakoneen syöttölaitteiston ohjaamiseksi

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3381761A (en) * 1964-10-14 1968-05-07 Atlas Copco Ab Automatic rock drilling means
FI97419B (fi) * 1993-09-20 1996-08-30 Tamrock Oy Sovitelma kallionporakoneen syöttölaitteiston ohjaamiseksi
US5701962A (en) * 1993-09-20 1997-12-30 Tamrock Oy Arrangement for controlling the feed mechanism of a rock drill

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023249518A1 (fr) * 2022-06-20 2023-12-28 Epiroc Rock Drills Aktiebolag Procédé et agencement de stabilisation d'un système d'alimentation d'un équipement de travail d'exploitation minière ou de construction

Also Published As

Publication number Publication date
FI20012407A0 (fi) 2001-12-05
AU2002346777A1 (en) 2003-06-23
FI20012407A (fi) 2003-06-06
AU2002346777B2 (en) 2007-04-26
SE526167C2 (sv) 2005-07-19
SE0401441D0 (sv) 2004-06-07
SE0401441L (sv) 2004-06-07

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