CA1236826A - Drilling boom - Google Patents
Drilling boomInfo
- Publication number
- CA1236826A CA1236826A CA000474160A CA474160A CA1236826A CA 1236826 A CA1236826 A CA 1236826A CA 000474160 A CA000474160 A CA 000474160A CA 474160 A CA474160 A CA 474160A CA 1236826 A CA1236826 A CA 1236826A
- Authority
- CA
- Canada
- Prior art keywords
- boom
- axis
- cylinder
- carrier
- pivoted
- 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
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 7
- 239000012530 fluid Substances 0.000 abstract description 6
- 230000008602 contraction Effects 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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
- 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
- E21B7/025—Rock drills, i.e. jumbo drills
-
- 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
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)
Abstract
ABSTRACT
A drilling boom is pivoted about a first axis on a base and is pivoted about that axis by a first hydraulic cylinder. It carries a feeder beam carrier at its forward end. The carrier is pivoted at the forward end of the boom about a second axis which is parallel to the first axis, and it is moved about the second axis by a second hydraulic cylinder in a sense opposite to that in which the boom is moved by the first cylinder. The first and second cylinder are so dimensioned and hydraulically interconnected that fluid which is expelled from the first cylinder actuates the second cylinder and vice versa. The angular movements of the boom and carrier are equal in magnitude.
A drilling boom is pivoted about a first axis on a base and is pivoted about that axis by a first hydraulic cylinder. It carries a feeder beam carrier at its forward end. The carrier is pivoted at the forward end of the boom about a second axis which is parallel to the first axis, and it is moved about the second axis by a second hydraulic cylinder in a sense opposite to that in which the boom is moved by the first cylinder. The first and second cylinder are so dimensioned and hydraulically interconnected that fluid which is expelled from the first cylinder actuates the second cylinder and vice versa. The angular movements of the boom and carrier are equal in magnitude.
Description
SUE;
BACKGROUND TO THE INVENTION
This invention relates to a drilling boom of the kind in which a drill feeder beam is carried at the forward end of an extensible boom which at its rearward end is pivoted to a base to lift and slew.
5 Unless the feeder beam is properly tilted and its orientation readjusted when the boom tilts and slews, the beam does not remain parallel to the centre line of a tunnel and retain the same drilling orientation in all positions to which the boom is adjusted. This may lead to less than optimum blasting results.
10 It is an object of the invention to provide a boom which has an automatic interface between lifting of the boom and tilting of the beam as well as stewing of the boom and orientation of the beam.
Furthermore booms used currently result in a face coverage pattern exhibiting curvature of one form or another erg; "hour glass" curvature.
15 It is another object of the invention to overcome this drawback.
SUMMARY OF THE INVENTION
According to the invention a drilling boom is pivoted about a first axis on a base, the boom is moved about the first axis by means of a first hydraulic cylinder, the boom carries a feeder beam carrier at its forward 20 end, the carrier is pivoted at that end about a second axis parallel to the first axis, the carrier is moved about the second axis by means of a second hydraulic cylinder in a sense opposite to the sense in which the boom is moved by the first cylinder and the first and second cylinders are so dimensioned and so hydraulically interconnected that fluid 25 expelled from the first cylinder actuates the second cylinder and the other way round.
, lZ3~i826 In the preferred form of the invention the first and second cylinders are in communication such that the angular movements of the boom and carrier are equal.
Further according to the invention the boom is also pivoted about a third 5 axis at right angles to, and in a parallel plane to the plane containing, the first axis, a third hydraulic cylinder causes the boom to move about the third axis, the carrier is pivoted to the boom end about a fourth axis at right angles to the second axis, a fourth hydraulic cylinder causes the carrier to move about the fourth axis, and the third and 10 fourth cylinders are so dimensioned and so hydraulically interconnected that fluid expelled from the third cylinder actuates the fourth cylinder and the other way round.
In the case of the third and fourth cylinders the full bore and annular chambers are preferably interconnected.
Figure 1 is a perspective view of one embodiment of the invention, Figure 2 is a diagrammatic representation of two hydraulic cylinders, Figure 3 is a view similar to Figure 3 of another pair of cylinders, Figure 4 is a diagram illustrating the lift and tilt principles of the 20 invention, and Figure 5 is a diagram of the slew and orientation principles.
DESCRIPTION OF EMBODIMENTS
In Figure 1 a boom 10 is carried on a base plate 11 secured to a suitable conveyance. The boom 10 is extensible in a manner know per so. It is 25 pivoted about a lifting axis 12 on a bracket 13. The bracket 13 is pivoted about an axis 14 parallel to the plate 11.
~36821~
Pivoted to the bracket 13 is a lift cylinder 15 extending to a pivot 16 or, the boom 10. By expanding and contracting the cylinder 15 the boom 10 is caused to move in a plane containing the longitudinal axis of the boom 10, the axis of the cylinder 15 and the axis 14. This will usually be a 5 vertical plane so that the boom is lifted and lowered by the cylinder 15.
A slew cylinder 17 is pivoted through a link 40 on a bracket 18 on the plate 11 about an axis 19 parallel to the axis 14 and about a pivot 20 on the boom 10. Expansion and contraction of the cylinder 17 causes the plane in which the boom moves under the action of the cylinder 15 to 10 pivot about the axis 14 which will usually be vertical.
A feeder beam 30 is rotatable bracketed to a carrier 21 in a well known manner. The carrier 21 is pivoted about an axis 22 on a bracket 23 which in turn is pivoted about an axis 24 on the forward end of the boom 10. A
cylinder 25 is pivoted about a pivot 26 on the bracket 23 and about a 15 pivot 27 on the boom 10. The cylinder 25 is the tilt cylinder and by expanding and contracting it the tilt of the beam 30 relatively to the boom 10 may be altered.
Orientation cylinder 28 is pivoted at a pivot 29 on a bracket 31 fast with the boom 10 and on a pivot 32 on the forward end of the boom 10.
20 With the longitudinal axes of the boom 10 and the carrier 21 in the same plane expansion and contraction of the cylinder 28 causes the orientation of the beam 30 to change in a plane normal to the last mentioned plane.
The various pivot lines and axes are so chosen and positioned and the cylinders 15, 17, 25 and 28 so chosen that the following conditions can 25 be satisfied for all angular positions of the boom 10:-Angular movement of the boom 10 about the axis 12 is equal and opposite to the angular movement of the carrier 21 about the axis 22.
30 Angular movement of the boom 10 about the axis 14 is equal and opposite to the angular movement of the carrier 21 about the axis 24.-I ~Z368Z6 This is illustrated diagrammatically in Figures 4 and 5. In Figure 4 two positions of the lift cylinder 15 are illustrated, while in Figure 5 two positions of the slew cylinder 17 are illustrated.
The manner of interconnection of the cylinders 15 and 25 is illustrated5 in Figure 2. When the cylinder 15 expands it pumps fluid from its annular section 40 into the annular section 41 of the cylinder 25 along the connection 42. For contraction fluid is fed into the full bone section 44 of the cylinder 25 thereby pumping fluid from the annular section 41 back into the annular section 40 of the cylinder 15.
10 On the other hand the cylinders 17 and 28 have to interact in a different way. In this case the cylinders expand and contract simultaneously.
Such an action could be achieved by means of the structure illustrated in Figure 3.
During testing, the inventors compared predicted lift, slew, tilt and 15 orientation angles with actually measured values of these angles, and found a very good correlation between the two sets of values. For instance, where a flit angle of 30 is caused by actuation of the cylinder 15, the predicted tilt angle is also 30. A practical measurement resulted in a tilt angle with exactly this value. Where the 20 slew angle resulting from appropriate actuation of the cylinder 17 resulted in a slew angle of 40, the measured slew angle was 39,15 which represents a minor deviation only from the predicted slew angle of 40.
.
In addition, practical testing has shown that the upright walls of a mine tunnel formed by blasting with drilled holes made by a machine fitted 25 with a boom of the type described exhibit very little deviation from the vertical.
BACKGROUND TO THE INVENTION
This invention relates to a drilling boom of the kind in which a drill feeder beam is carried at the forward end of an extensible boom which at its rearward end is pivoted to a base to lift and slew.
5 Unless the feeder beam is properly tilted and its orientation readjusted when the boom tilts and slews, the beam does not remain parallel to the centre line of a tunnel and retain the same drilling orientation in all positions to which the boom is adjusted. This may lead to less than optimum blasting results.
10 It is an object of the invention to provide a boom which has an automatic interface between lifting of the boom and tilting of the beam as well as stewing of the boom and orientation of the beam.
Furthermore booms used currently result in a face coverage pattern exhibiting curvature of one form or another erg; "hour glass" curvature.
15 It is another object of the invention to overcome this drawback.
SUMMARY OF THE INVENTION
According to the invention a drilling boom is pivoted about a first axis on a base, the boom is moved about the first axis by means of a first hydraulic cylinder, the boom carries a feeder beam carrier at its forward 20 end, the carrier is pivoted at that end about a second axis parallel to the first axis, the carrier is moved about the second axis by means of a second hydraulic cylinder in a sense opposite to the sense in which the boom is moved by the first cylinder and the first and second cylinders are so dimensioned and so hydraulically interconnected that fluid 25 expelled from the first cylinder actuates the second cylinder and the other way round.
, lZ3~i826 In the preferred form of the invention the first and second cylinders are in communication such that the angular movements of the boom and carrier are equal.
Further according to the invention the boom is also pivoted about a third 5 axis at right angles to, and in a parallel plane to the plane containing, the first axis, a third hydraulic cylinder causes the boom to move about the third axis, the carrier is pivoted to the boom end about a fourth axis at right angles to the second axis, a fourth hydraulic cylinder causes the carrier to move about the fourth axis, and the third and 10 fourth cylinders are so dimensioned and so hydraulically interconnected that fluid expelled from the third cylinder actuates the fourth cylinder and the other way round.
In the case of the third and fourth cylinders the full bore and annular chambers are preferably interconnected.
Figure 1 is a perspective view of one embodiment of the invention, Figure 2 is a diagrammatic representation of two hydraulic cylinders, Figure 3 is a view similar to Figure 3 of another pair of cylinders, Figure 4 is a diagram illustrating the lift and tilt principles of the 20 invention, and Figure 5 is a diagram of the slew and orientation principles.
DESCRIPTION OF EMBODIMENTS
In Figure 1 a boom 10 is carried on a base plate 11 secured to a suitable conveyance. The boom 10 is extensible in a manner know per so. It is 25 pivoted about a lifting axis 12 on a bracket 13. The bracket 13 is pivoted about an axis 14 parallel to the plate 11.
~36821~
Pivoted to the bracket 13 is a lift cylinder 15 extending to a pivot 16 or, the boom 10. By expanding and contracting the cylinder 15 the boom 10 is caused to move in a plane containing the longitudinal axis of the boom 10, the axis of the cylinder 15 and the axis 14. This will usually be a 5 vertical plane so that the boom is lifted and lowered by the cylinder 15.
A slew cylinder 17 is pivoted through a link 40 on a bracket 18 on the plate 11 about an axis 19 parallel to the axis 14 and about a pivot 20 on the boom 10. Expansion and contraction of the cylinder 17 causes the plane in which the boom moves under the action of the cylinder 15 to 10 pivot about the axis 14 which will usually be vertical.
A feeder beam 30 is rotatable bracketed to a carrier 21 in a well known manner. The carrier 21 is pivoted about an axis 22 on a bracket 23 which in turn is pivoted about an axis 24 on the forward end of the boom 10. A
cylinder 25 is pivoted about a pivot 26 on the bracket 23 and about a 15 pivot 27 on the boom 10. The cylinder 25 is the tilt cylinder and by expanding and contracting it the tilt of the beam 30 relatively to the boom 10 may be altered.
Orientation cylinder 28 is pivoted at a pivot 29 on a bracket 31 fast with the boom 10 and on a pivot 32 on the forward end of the boom 10.
20 With the longitudinal axes of the boom 10 and the carrier 21 in the same plane expansion and contraction of the cylinder 28 causes the orientation of the beam 30 to change in a plane normal to the last mentioned plane.
The various pivot lines and axes are so chosen and positioned and the cylinders 15, 17, 25 and 28 so chosen that the following conditions can 25 be satisfied for all angular positions of the boom 10:-Angular movement of the boom 10 about the axis 12 is equal and opposite to the angular movement of the carrier 21 about the axis 22.
30 Angular movement of the boom 10 about the axis 14 is equal and opposite to the angular movement of the carrier 21 about the axis 24.-I ~Z368Z6 This is illustrated diagrammatically in Figures 4 and 5. In Figure 4 two positions of the lift cylinder 15 are illustrated, while in Figure 5 two positions of the slew cylinder 17 are illustrated.
The manner of interconnection of the cylinders 15 and 25 is illustrated5 in Figure 2. When the cylinder 15 expands it pumps fluid from its annular section 40 into the annular section 41 of the cylinder 25 along the connection 42. For contraction fluid is fed into the full bone section 44 of the cylinder 25 thereby pumping fluid from the annular section 41 back into the annular section 40 of the cylinder 15.
10 On the other hand the cylinders 17 and 28 have to interact in a different way. In this case the cylinders expand and contract simultaneously.
Such an action could be achieved by means of the structure illustrated in Figure 3.
During testing, the inventors compared predicted lift, slew, tilt and 15 orientation angles with actually measured values of these angles, and found a very good correlation between the two sets of values. For instance, where a flit angle of 30 is caused by actuation of the cylinder 15, the predicted tilt angle is also 30. A practical measurement resulted in a tilt angle with exactly this value. Where the 20 slew angle resulting from appropriate actuation of the cylinder 17 resulted in a slew angle of 40, the measured slew angle was 39,15 which represents a minor deviation only from the predicted slew angle of 40.
.
In addition, practical testing has shown that the upright walls of a mine tunnel formed by blasting with drilled holes made by a machine fitted 25 with a boom of the type described exhibit very little deviation from the vertical.
Claims
THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
Claim 1:
A drilling boom assembly comprising:
a base, a drilling boom, a feeder beam, a carrier for the feeder beam at the forward end of the boom, a bracket on the base pivoted about a first axis parallel to the base, a pivot on the rear end of the boom for causing the boom to pivot on the bracket about a second axis at right angles to the first axis and also parallel to the base, means for pivoting the carrier to the boom about third and fourth axes which are respectively parallel to the first and second axes, first and second hydraulic cylinders for moving the boom about the first and second axis respectively, third and fourth hydraulic cylinders for moving the carrier about the third and fourth axes respectively in senses opposite to the senses in which the boom is moved by the first and second cylinders respectively, the angular movements of the carrier about the third and fourth axes being the same as the angular movements of the boom about the first and second axes respectively, and means to rotate the feeder beam about the longitudinal axis of the carrier.
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
Claim 1:
A drilling boom assembly comprising:
a base, a drilling boom, a feeder beam, a carrier for the feeder beam at the forward end of the boom, a bracket on the base pivoted about a first axis parallel to the base, a pivot on the rear end of the boom for causing the boom to pivot on the bracket about a second axis at right angles to the first axis and also parallel to the base, means for pivoting the carrier to the boom about third and fourth axes which are respectively parallel to the first and second axes, first and second hydraulic cylinders for moving the boom about the first and second axis respectively, third and fourth hydraulic cylinders for moving the carrier about the third and fourth axes respectively in senses opposite to the senses in which the boom is moved by the first and second cylinders respectively, the angular movements of the carrier about the third and fourth axes being the same as the angular movements of the boom about the first and second axes respectively, and means to rotate the feeder beam about the longitudinal axis of the carrier.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8404005 | 1984-02-15 | ||
| GB848404005A GB8404005D0 (en) | 1984-02-15 | 1984-02-15 | Drilling boom |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1236826A true CA1236826A (en) | 1988-05-17 |
Family
ID=10556659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000474160A Expired CA1236826A (en) | 1984-02-15 | 1985-02-13 | Drilling boom |
Country Status (11)
| Country | Link |
|---|---|
| AT (1) | AT388415B (en) |
| AU (1) | AU573777B2 (en) |
| CA (1) | CA1236826A (en) |
| CH (1) | CH669638A5 (en) |
| DE (1) | DE3504761C2 (en) |
| FI (1) | FI850615L (en) |
| GB (2) | GB8404005D0 (en) |
| NO (1) | NO850576L (en) |
| SE (1) | SE463273B (en) |
| ZA (1) | ZA851077B (en) |
| ZM (1) | ZM885A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8607997D0 (en) * | 1986-04-02 | 1986-05-08 | Boart Uk Ltd | Drilling boom |
| FI79884C (en) * | 1988-06-03 | 1990-03-12 | Tampella Oy Ab | Method and apparatus for drilling a hole in rock |
| GB9025341D0 (en) * | 1990-11-21 | 1991-01-02 | Mercol Descaling Co Ltd | Pipeline boring apparatus |
| FI955172A0 (en) * | 1995-10-30 | 1995-10-30 | Sakari Pinomaeki | Foerfarande i ett tryckmediumsystem och ett tryckmediumsystem |
| SE529623C2 (en) | 2006-02-28 | 2007-10-09 | Atlas Copco Rock Drills Ab | Rock drilling rig and method and apparatus for feed direction control at a rock drilling rig |
| SE529667C2 (en) * | 2006-02-28 | 2007-10-16 | Atlas Copco Rock Drills Ab | Rock drilling apparatus and method for such |
| CN109838243A (en) * | 2019-01-25 | 2019-06-04 | 中国铁建重工集团有限公司 | A kind of splitting device for tunnel excavation |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA886975A (en) * | 1971-11-30 | Atlas Copco Aktiebolag | Hydraulic parallel motion means for drill boom supported rock drilling apparatus | |
| US3711047A (en) * | 1970-12-14 | 1973-01-16 | Bradley Pulverizer Co | Rock drill positioning machine |
| SE374164B (en) * | 1973-07-03 | 1975-02-24 | Atlas Copco Ab | |
| AU479276B2 (en) * | 1973-10-04 | 1974-01-03 | Atlas Copco Aktiebolag | Improvements relating to rock drilling apparatus |
| SE395173B (en) * | 1974-12-17 | 1977-08-01 | Verkstadsproduktion I Borlenge | DEVICE FOR ADJUSTING A TOOL |
| GB1525511A (en) * | 1975-07-02 | 1978-09-20 | Compair Constr Mining Ltd | Hydraulic parallelmotion system for drilling machines etc |
| DE2540572C3 (en) * | 1975-09-11 | 1979-04-26 | Gosudarstvennyj Proektno-Konstruktorskij I Eksperimentalnyj Institut Po Obogatitelnomu Oborudovaniju Gipromaschobogaschtschenie, Moskovskaja Oblast (Sowjetunion) | Drilling jib |
| GB1524839A (en) * | 1975-09-12 | 1978-09-13 | G P Konstrukt I Exi Obogatte | Drilling boom assembly |
| SE424759B (en) * | 1978-04-11 | 1982-08-09 | Atlas Copco Ab | VALVE CONNECTION FOR HYDRAULIC DRILL BOOM CONTROL |
| SE424758B (en) * | 1978-04-11 | 1982-08-09 | Atlas Copco Ab | HYDRAULIC ADJUSTABLE DRILL BOOM |
| SE424661B (en) * | 1978-04-11 | 1982-08-02 | Atlas Copco Ab | BORRTORN, GUIDED FOR HYDRAULIC MANOVER |
| AT375148B (en) * | 1981-05-07 | 1984-07-10 | Ver Edelstahlwerke Ag | DRILLING DEVICE, IN PARTICULAR STORE DRILLING DEVICE, AND METHOD FOR CONTROLLING DRILLING DEVICES |
-
1984
- 1984-02-15 GB GB848404005A patent/GB8404005D0/en active Pending
-
1985
- 1985-02-13 DE DE3504761A patent/DE3504761C2/en not_active Expired - Lifetime
- 1985-02-13 ZA ZA851077A patent/ZA851077B/en unknown
- 1985-02-13 CA CA000474160A patent/CA1236826A/en not_active Expired
- 1985-02-13 SE SE8500661A patent/SE463273B/en not_active Application Discontinuation
- 1985-02-13 AU AU38683/85A patent/AU573777B2/en not_active Ceased
- 1985-02-14 GB GB08503809A patent/GB2156714B/en not_active Expired
- 1985-02-14 NO NO850576A patent/NO850576L/en unknown
- 1985-02-14 FI FI850615A patent/FI850615L/en not_active Application Discontinuation
- 1985-02-15 ZM ZM8/85A patent/ZM885A1/en unknown
- 1985-02-15 CH CH721/85A patent/CH669638A5/de not_active IP Right Cessation
- 1985-02-15 AT AT0044285A patent/AT388415B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CH669638A5 (en) | 1989-03-31 |
| SE8500661L (en) | 1985-08-16 |
| GB8404005D0 (en) | 1984-03-21 |
| GB2156714B (en) | 1987-12-16 |
| NO850576L (en) | 1985-08-16 |
| ZM885A1 (en) | 1985-08-22 |
| FI850615L (en) | 1985-08-16 |
| FI850615A0 (en) | 1985-02-14 |
| ZA851077B (en) | 1985-11-27 |
| AU573777B2 (en) | 1988-06-23 |
| GB8503809D0 (en) | 1985-03-20 |
| DE3504761C2 (en) | 1993-10-07 |
| SE8500661D0 (en) | 1985-02-13 |
| AU3868385A (en) | 1985-09-12 |
| GB2156714A (en) | 1985-10-16 |
| AT388415B (en) | 1989-06-26 |
| DE3504761A1 (en) | 1985-10-10 |
| SE463273B (en) | 1990-10-29 |
| ATA44285A (en) | 1988-11-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |