EP0824634B1 - A hydraulic arrangement for turning the actuator of a rock drilling machine - Google Patents
A hydraulic arrangement for turning the actuator of a rock drilling machine Download PDFInfo
- Publication number
- EP0824634B1 EP0824634B1 EP96910978A EP96910978A EP0824634B1 EP 0824634 B1 EP0824634 B1 EP 0824634B1 EP 96910978 A EP96910978 A EP 96910978A EP 96910978 A EP96910978 A EP 96910978A EP 0824634 B1 EP0824634 B1 EP 0824634B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- control
- pistons
- pressure fluid
- valve
- 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
Links
- 238000005553 drilling Methods 0.000 title claims description 14
- 239000011435 rock Substances 0.000 title claims description 9
- 239000012530 fluid Substances 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims description 3
- 238000005476 soldering Methods 0.000 claims description 3
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 238000000034 method Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/02—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting
- E21B7/022—Control of the drilling operation; Hydraulic or pneumatic means for activation or operation
Definitions
- the invention relates to a hydraulic arrangement for turning the actuator of a rock drilling machine about its turning axis to at least three different positions, the arrangement comprising a pressure medium cylinder provided with two cylinder spaces and two pistons, the cylinder being arranged to affect and turn the actuator, and at least one control valve with which pressure fluid can be fed into the cylinder spaces of the cylinder such that the two pistons can be simultaneously fully ejected or fully retracted, or one can be ejected while the other is retracted.
- the actuator such as a bolting head, which comprises one or more devices
- a bolt feeding apparatus can be turned, in succession, such that they align with the same axis, whereby the soldering material and then the bolt can be fed into the drill hole.
- this is effected by moving different apparatuses either along transverse rails by a linear movement or by turning the apparatuses about an axis parallel to the axis of the drill rod by means of hydraulic cylinders.
- the object of the present invention is to provide a hydraulic arrangement by which control can be implemented in a simple and reliable manner.
- the hydraulic arrangement according to the invention is characterized in that the control valve can be placed in at least three control positions but in only one at a time; that in each control position the pressure fluid is arranged to affect both cylinder spaces of the cylinder so that in the control position concerned, the pistons always settle in a certain predefined position.
- each control valve is arranged to control both hydraulic cylinders at the same time such that when a control valve is in a certain position, the cylinders settle in a certain predefined position, thereby turning the drill machine to a certain predefined position.
- the arrangement according to the invention makes it possible to always turn the actuator of the rock drilling machine to a correct predefined position.
- Fig. 1 shows a schematic view of an embodiment implementing a hydraulic arrangement according to the invention.
- reference number 1 indicates a bolting head functioning as an actuator of a rock drilling machine.
- a cylinder 2 turning the bolting head is a double cylinder with cylinder spaces 2a and 2b, both of which comprise an independently moving piston 3a and 3b, respectively.
- Both cylinder spaces 2a and 2b are connected to pressure-controlled pilot-operated check valves 6, 7, 8 and 9 through pressure channels 4a, 4b and 5a, 5b, respectively, such that channels 4a and 5a are connected to pilot-operated check valves 6 and 8, and channels 4b and 5b are connected in parallel to pilot-operated check valves 7 and 9.
- the valves close and stop the flow of the pressure medium to and from cylinder 2.
- Pilot-operated check valves 6 and 9 are connected to control valves 11 and 12 through pressure fluid channels 10a to 10c. Further, one pressure fluid channel 10d coming from pilot-operated check valves 8 and 9 is connected directly to a pressure fluid container 13. Control valves 11 and 12 receive pressure fluid along pressure fluid channel 14, and, correspondingly, pressure fluid channel 15 leads from valve 11 directly to the pressure fluid container 13.
- Figs. 2a to 2c show how valves 11 and 12 together with cylinder 2 control the bolting head. All the figures show the positions of valves 11 and 12, cylinder 2 and the bolting head after a control movement. In a situation illustrated by fig. 1, cylinder 2 is at its shortest, i.e. in one extreme position. When control valve 11 is moved to a position according to fig. 2a, the pressure fluid can flow through channel 10a to pilot-operated check valves 6 and 7. Valve 12 is then in free position as shown in fig. 2a, and so it does not affect the operation in any way.
- the pressure fluid then penetrates into the cylinder spaces 2a and 2b through pilot-operated check valves 6 and 7, behind the pistons 3a and 3b, whereby pistons 3a and 3b project as shown in fig. 2a. Since there is a partition wall between the cylinder spaces 2a and 2b in the double cylinder 2, the pressures prevailing in the cylinder spaces have no effect whatsoever on each other.
- the visible bolting head which is arranged to pivot about an axis 17 in relation to a frame 16, is here in its extreme left-hand-side position, and the drilling axis of a drill machine 18 is in a predefined position.
- a bolt feeding apparatus 19 and a concrete feeding apparatus 20 are then off-set from line L.
- valve 11 When valve 11 is in free position, i.e. in the middle position, no pressure fluid flows from channel 14, and cylinder 2 remains in its current position.
- valve 12 When valve 12 is pushed to the position shown in fig. 2b, the pressure fluid flows from channel 14 through valve 12 to channel 10c and further through pressure-controlled pilot-operated check valves 8 and 9 to channels 4a and 5b.
- the piston 3a of cylinder 2a remains ejected, but the piston 3b of cylinder 2b slides inside until it is fully retracted.
- the distance between the positions to which the piston rods of the cylinder 2 are fixed is between the extreme positions of the piston rods, but is always exactly of a certain size.
- the bolting head 1 is here turned such that the concrete feeding apparatus 20 is at line L, in alignment with the above drilling axis.
- valve 11 When valve 11 is moved to the position shown in fig. 2c, the pressure fluid channel 14 is connected to channel 10b, while channel 10a is connected through channel 15 to the pressure fluid container.
- Valve 12 is here in free position and does not affect the operation in any way.
- the pressure fluid here flows from channel 10b through pilot-operated check valves 6 and 7 to both cylinder spaces 2a and 2b so that the pressure pushes the pistons 3a and 3b inside the cylinder. Since piston 3a is already inside the cylinder, pressure fluid flows only through pilot-operated check valve 7, also pushing piston 3b inside the cylinder so that the cylinder 2 is at its shortest, in the position shown in fig. 1.
- the axis of the bolt feeding apparatus 19 and thereby the bolt thereon align with the drilling axis at line L.
- valves 11 and 12 are preferably cross-connected valves in one and the same valve unit: when the control rod is moved forward or backward, the cylinder 2 moves to the extreme positions, and movement of the control lever from the middle position in the transverse direction produces the intermediate positions as shown in fig. 2b.
- Fig. 3 shows an arrangement corresponding to the one shown in fig. 1, with the exception that it comprises a separate change-over switch, which is needed since the cylinders of the double cylinder 2 are designed to differ in length such that control of the cylinder in different ways gives four predefined positions.
- the operation and arrangement according to fig. 3 are otherwise exactly the same as in fig. 1, but the figure shows a separate directional control valve 22 that is arranged to change channels 10d and 10c with each other such that it is possible to make a choice between two middle positions.
- the operation of valve 11 is exactly the same as and corresponds to the positions shown in figs. 2a and 2c.
- the control of the middle position i.e. the operation and connections of valve 12, completely correspond to fig. 2b, but the position of the double cylinder 2 depends on the position of valve 22.
- Figs. 4a to 4c show the control of the arrangement according to fig. 3 with the different positions of directional control valve 22.
- Fig. 4a shows the position of valves 11 and 12 when the operation of the arrangement is to be controlled with directional control valve 22.
- the position of directional control valve 22 can be selected either before using valve 12 or during its use.
- Fig. 4b shows a situation where by the use of valve 12, one of the pistons of the double cylinder 2, i.e. here piston 3a, is retracted, while piston 3b is ejected.
- the change of the position of directional control valve 22 in accordance with fig. 4c produces a situation where the positions of pistons 3a and 3b are reversed, i.e.
- piston 3a is ejected and piston 3b is retracted. Because of the different impact lengths of pistons 3a and 3b, there are two different distances between the heads of the piston rods of the cylinder 2, and so there are two accurately defined positions between the extreme positions of the ends of the piston rods of the cylinder 2, whereby, e.g. when the bolting head is turned, four permanent turning positions are provided for different actuators.
- This embodiment is useful when there are four actuators and when it must be possible to use each one of them in exactly the same position in the axial direction.
- An example for this is a bolting head comprising a drill machine for drilling a hole, a solder resin feeding apparatus, a concrete feeding apparatus, and a bolt feeding apparatus.
- a valve can be used for choosing whether to use the resin feeding apparatus or the concrete feeding apparatus, since both are not necessarily needed simultaneously.
- the shorter piston rod 3a is retracted into its cylinder space, whereby the bolting head 1 turns about axis 17, and a tube 21 of the resin feeding apparatus aligns with the drilling axis of the above drill machine 18 in accordance with fig. 4b.
- piston 3a remains ejected from its cylinder space, whereas piston 3b is retracted into its cylinder space, whereby a concrete delivery hose 20 aligns with the drill hole as shown in fig. 4c.
- Valve 12 can be connected in the same way as valve 11: channel 10d is connected to one channel of valve 12, and so a change-over can be conducted between channels 10c and 10d by controlling the valve so as to achieve the desired intermediate position.
- valves are arranged to control both cylinders by forced control so that a certain control movement always makes the cylinders settle in a certain predefined position.
- Valves 11 and 12 are preferably cross-connected valves controlled by a single control lever.
- the second position of valve 12 shown in the figures is not needed in the control when only three control positions are used. Valve 12 can then have a simpler structure, or the second position can be used for controlling some other actuator. When the same lever is to be placed in four control positions, valve 12 must be implemented as depicted in the figure.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Earth Drilling (AREA)
- Fluid-Pressure Circuits (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
Description
Claims (5)
- A hydraulic arrangement for turning the actuator of a rock drilling machine about its turning axis to at least three different positions, the arrangement comprising a pressure medium cylinder (2) provided with two cylinder spaces (2a, 2b) and two pistons (3a, 3b), the cylinder being arranged to affect and turn the actuator, and at least one control valve (12) with which pressure fluid can be fed into the cylinder spaces (2a, 2b) of the cylinder such that the two pistons (3a, 3b) can be simultaneously fully ejected or fully retracted, or one can be ejected while the other is retracted, whereby the control valve (12) can be placed in at least three control positions but in only one at a time; characterized in that in each control position the pressure fluid is arranged to affect both cylinder spaces (2a, 2b) of the cylinder (2) so that in the control position concerned, the pistons (3a, 3b) always settle in a certain predefined position.
- A hydraulic arrangement according to claim 1, characterized in that the pressure fluid channels of the valves are connected to the cylinder spaces (2a, 2b) of the cylinder (2) through pressure-controlled pilot-operated check valves (6 - 8); that in the first control position, the pressure fluid channel (10a) coming from the control valve (11) is connected behind the pistons (3a, 3b) of both cylinder spaces (2a, 2b) of the pilot-operated check valves (6, 7) so that both pistons (3a, 3b) are ejected from the cylinder (2); that in the second control position, the pressure fluid channel (10b) coming from the control valve (11) is connected through pilot-operated check valves (6, 7) to the cylinder spaces (2a, 2b) of the cylinder (2) so that the pistons (3a, 3b) are retracted into the cylinder (2); and in the third control position, the pressure fluid channel (10c) coming from the control valve (12) is connected through pilot-operated check valves (8, 9) to the cylinder spaces (2a, 2b) of the cylinder (2) so that one piston (3a; 3b) is ejected from the cylinder (2) while the other piston (3b; 3a) is retracted into the cylinder (2).
- A hydraulic arrangement according to claim 2, characterized in that the cylinder spaces (2a, 2b) of the cylinder (2) and, correspondingly, the pistons (3a, 3b) are of different length, and that the valve can also be placed in a fourth control position, in which the piston (3a) that was ejected in the third position is retracted into the cylinder (2) and, correspondingly, the other piston (3b) that was retracted in the third position is ejected from the cylinder (2).
- A hydraulic arrangement according to any one of the preceding claims, characterized in that the cylinder (2) is arranged to turn the bolting head of the rock drilling machine so that the drilling axis of the drill machine (18), the soldering material delivery tube (20, 21), and the bolt feeding apparatus (19) can be turned, in succession, about the turning axis (17) such that they align with the same drilling axis.
- A hydraulic arrangement according to any one of the preceding claims, characterized in that the valves (11, 12) are cross-connected valves controlled with a single lever in such a way that only one control position of either valve can be switched on at a time.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI951913 | 1995-04-21 | ||
FI951913A FI105944B (en) | 1995-04-21 | 1995-04-21 | Hydraulic assembly for rotating rock actuator actuator |
PCT/FI1996/000210 WO1996033337A1 (en) | 1995-04-21 | 1996-04-18 | A hydraulic arrangement for turning the actuator of a rock drilling machine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0824634A1 EP0824634A1 (en) | 1998-02-25 |
EP0824634B1 true EP0824634B1 (en) | 2003-01-15 |
Family
ID=8543285
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96910978A Expired - Lifetime EP0824634B1 (en) | 1995-04-21 | 1996-04-18 | A hydraulic arrangement for turning the actuator of a rock drilling machine |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP0824634B1 (en) |
JP (1) | JP3449725B2 (en) |
AT (1) | ATE231213T1 (en) |
AU (1) | AU704357B2 (en) |
DE (1) | DE69625808D1 (en) |
FI (1) | FI105944B (en) |
NO (1) | NO974784D0 (en) |
PL (1) | PL322844A1 (en) |
WO (1) | WO1996033337A1 (en) |
ZA (1) | ZA962922B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109458201A (en) * | 2018-11-23 | 2019-03-12 | 晋中学院 | Pressure flow is adjustable anti-jamming hydraulic drill windlass |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU501926B2 (en) * | 1977-09-06 | 1979-07-05 | Australian Iron & Steel Pty. Limited | Hydraulic circuit for rock drill |
US5246313A (en) * | 1991-06-28 | 1993-09-21 | Secoma S.A. | Apparatus for forming long and short holes and setting rock bolts |
-
1995
- 1995-04-21 FI FI951913A patent/FI105944B/en not_active IP Right Cessation
-
1996
- 1996-04-12 ZA ZA962922A patent/ZA962922B/en unknown
- 1996-04-18 AU AU54004/96A patent/AU704357B2/en not_active Ceased
- 1996-04-18 AT AT96910978T patent/ATE231213T1/en not_active IP Right Cessation
- 1996-04-18 JP JP53150396A patent/JP3449725B2/en not_active Expired - Fee Related
- 1996-04-18 WO PCT/FI1996/000210 patent/WO1996033337A1/en active IP Right Grant
- 1996-04-18 DE DE69625808T patent/DE69625808D1/en not_active Expired - Lifetime
- 1996-04-18 EP EP96910978A patent/EP0824634B1/en not_active Expired - Lifetime
- 1996-04-18 PL PL96322844A patent/PL322844A1/en unknown
-
1997
- 1997-10-16 NO NO974784A patent/NO974784D0/en unknown
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109458201A (en) * | 2018-11-23 | 2019-03-12 | 晋中学院 | Pressure flow is adjustable anti-jamming hydraulic drill windlass |
CN109458201B (en) * | 2018-11-23 | 2020-10-23 | 晋中学院 | Anti-blocking hydraulic drilling anchor machine with adjustable pressure and flow |
Also Published As
Publication number | Publication date |
---|---|
JPH11503800A (en) | 1999-03-30 |
ATE231213T1 (en) | 2003-02-15 |
PL322844A1 (en) | 1998-02-16 |
ZA962922B (en) | 1996-10-17 |
FI951913A (en) | 1996-10-22 |
JP3449725B2 (en) | 2003-09-22 |
NO974784L (en) | 1997-10-16 |
WO1996033337A1 (en) | 1996-10-24 |
DE69625808D1 (en) | 2003-02-20 |
FI951913A0 (en) | 1995-04-21 |
AU5400496A (en) | 1996-11-07 |
EP0824634A1 (en) | 1998-02-25 |
FI105944B (en) | 2000-10-31 |
AU704357B2 (en) | 1999-04-22 |
NO974784D0 (en) | 1997-10-16 |
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