GB1568219A - Pneumatic conveyance of cartidges to boreholes - Google Patents
Pneumatic conveyance of cartidges to boreholes Download PDFInfo
- Publication number
- GB1568219A GB1568219A GB51565/76A GB5156576A GB1568219A GB 1568219 A GB1568219 A GB 1568219A GB 51565/76 A GB51565/76 A GB 51565/76A GB 5156576 A GB5156576 A GB 5156576A GB 1568219 A GB1568219 A GB 1568219A
- Authority
- GB
- United Kingdom
- Prior art keywords
- conduit
- cartridges
- borehole
- valve
- suction
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
- F42D1/10—Feeding explosives in granular or slurry form; Feeding explosives by pneumatic or hydraulic pressure
Landscapes
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Description
(54) PNEUMATIC CONVEYANCE OF CARTRIDGES TO BOREHOLES
(71) We, ATLAS CoPco AKTIEBOLAG, a Swedish Company of Nacka, Sweden, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: This invention relates to a method and a device for feeding several cartridges together through a conduit into a borehole by compressed air.
It is an object of the present invention to provide a method of and device for use in the feeding of several cartridges together into a borehole.
The present invention provides a method of feeding several cartridges together through a conduit into a borehole by compressed air, wherein the cartridges are sucked one by one into the conduit so as to form a train of cartridges in said conduit before compressed air is supplied behind said train of cartridges in the conduit so as to blow them out of the conduit into the borehole.
In another aspect the present invention provides a method of feeding several cartridges together by compressed air into a borehole through a conduit, one end of which is positioned adjacent to or is inserted into the borehole, comprising a first step in which a negative pressure is applied through a suction passage that is coupled to a suction nozzle that forms part of the conduit and the cartridges are introduced one by one into the conduit so that they are sucked into the conduit towards the suction nozzle, and a second step in which the suction is shut off from the conduit and compressed air is supplied behind the train of cartridges in the conduit so that the cartridges are transported through the conduit and into the borehole.
In a further aspect the invention provides a device for feeding cartridges into a borehole, comprising a conduit having one end for disposition adjacent to or insertion into said borehole and its other end provided with an intake for receiving cartridges in use of the device, a suction means arranged for suckng the cartridges into the conduit, and a valving device arranged for supplying compressed air behind a train of cartridges located in the conduit so as to blow them through the conduit and into the borehole, a first shut-off valve being aranged for preventing suction of air through said one end of the conduit and a second shut-ofi valve being arranged for preventing blowing of air out through the intake at said other end of the conduit.
Further preferred details of the invention will appear from the following description given by way of example of an embodiment according to the invention illustrated with reference to the accompanying drawing which is a partially sectioned and partially schematic view of a feeding device of the invention shown in use in feeding cartridges into a borehole.
The drawing shows a borehole 11 that has just been drilled and in which a rock bolt (not shown) is to be affixed by means of a cement that consists of a two-component plastics mixed with sand.
The feeding device shown in the drawing is intended for delivering cartridges that comprise one of the components mixed with sand so as to form a plastic mixture enclosed in a plastic cover and the other component enclosed in a plastic cover inside the cartridge.
The feeding device comprises a conduit constituted partly by a delivery pipe 12 that is guided by a frame with an upper guide 14. The pipe is provided at an intermediate portion with a flange 13. On the guide 14, a flap 15 is pivotally mounted so as to shut the end 16 of the pipe when the pipe is in its position of rest as shown in the figure.
The pipe 12 can be fed into the borehole 11 by means of a pneumatic feed motor 17 that has a driving rubber roller disposed in frictional engagement with the pipe.
The pipe 12 is connected to a plastics hose 18 which constitutes a further part of
the conduit and is connected to a suction
nozzle 19 also constituting part of the con -duit. The other end of the suction nozzle
19 is connected to an intake in the form
of a receiving nozzle 20 at the other end
of the conduit via a plastics hose 21 that
has a somewhat greater diameter than the
plastics hose 18 and provides the remaining part of the conduit. The receiving nozzle
20 is of a conventional kind and it has a
pivotally mounted flap 22 that can alternately shut off a Ieceiving opening 23 of
the intake and a compressed air inlet 24 of the receiving nozzle 20. The suction valve
19 is connected via a suction line in the
form of a hose 26 and a valve 32 to a vacuum source in the form of a venturiejector 25 together constituting suction means.The flap 22 together with a valve 38 (see below) serve as a valving device to control the supply of compressed air to the
conduit and are arranged to provide a supply of compressed air behind a train of cartridges in the conduit.
The feeding device further includes a plurality of valves 30 to 37 and 39 which are, shown by means of conventional symbols, a one-way restrictor 45, an accumulator 46 and conduits 40-44 the conduit 40 being the main supply conduit for the compressed air.
A feeding sequence will now be described.
When the valve 30 (conveniently pedal
operated) is actuated by the operator, it switches the valves 31 and 32 so that the ejector 25 starts sucking air from the receiving nozzle 20. When, during this suction, the operator introduces, for instance six- cartridges 47 one by one into the receiving nozzle, the cartridges are sucked into a cartridge chamber of the conduit that is
constituted by the hose 21 and the suction nozzle 19 as shown in the figures. Some of the cartridges 47 may land in the hose 18 that in that case forms the cartridge chamber. Conveniently the operator inserts a sponge 48 that is sucked in behind the cart ridges.
When the operator then closes the valve 30 after inserting the cartridges into the receiving nozzle 20, the valves 31 and 32 return to their rest positions as shown in the figure. This pre-loading operation can advantageously be carried out while the borehole 11 is being drllled After completion of drilling, the delivery pipe 12 is moved into position aligned with the borehole and the operator presses the actuating button of the valve 33. An air pulse delivered through the conduit 41
shifts the bistable valve 34 which in turn via
the conduit 42 shifts the valve 35 of the feed motor 17 so that it starts to feed the pipe
12 into the borehole 11. When the pipe 12
has almost reached the bottom of the bore
hole 11, the flange 13 of the pipe shifts the
position valve 36.As a result, the conduit
43 is pressurized and shifts back the valve
34 and also shifts the valve 37 which, via
the conduit 44, immediately shifts the valve
38 to permit blowing of compressed air into
the compressed air inlet 24 of the receiving
nozzle 20 so that the cartridges-47 are blown
up through the conduit into the borehole
11. When the conduit 44 is pressurized, air also blows through a one-way restrict or 45 and into an accumulator 46. The ,pressure in the latter rises therefore, and after a - predetermined period, i.e after the cartridges have been blown into the borehole, this pressure becomes sufficient to shift the valve 35 of the feed motor to its position for reversing of the feed motor 17 so that the pipe 12 is then withdrawn from the borehole 11.
The resting position oF the pipe 12 is defined by the limit switch valve 39 that is actuated by the flange 13 cooperating therewith, to return, the bistable valve 37 to its position for venting the conduit 44, as shown in the figure, so that the valve 35 of the feed motor 17 takes up its closed central position. The system is now back in its starting condition.
The sponge 48 serves to keep the cartridges 47 in the borehole 11 when the feed pipe 12 has been withdrawn. Alternatively, the last cartridge 47 can be provided with a collar (not shown) that prevents it (and the other cartridges above) from falling out.
A rock bolt (not shown) in the form of a piece of reinforcing iron with a flange welded to it, can now be fed up into the borehole 11 whilst being rotated so that it breaks the cartridges 47 and mixes the two components thereof. The cement then hardens and holds the bolt fixed in position.
The feeding device could also be used to load a borehole with explosive cartridges
WHAT WE CLAIM IS:
1. A method for feeding several cart
ridges together through a conduit into a borehole by compressed air, wherein the cartridges are sucked one by one into the
conduit so as to form a train of cartridges
in said conduit before compressed air is supplied behind said train of cartridges in
the conduit so as to blow them out of the
conduit into the borehole.
2. A method according to claim 1, wherein the conduit is inserted into the borehole before the compressed air is sup plied behind said train of cartridges.
3. A method for feeding several cart
ridges together by compressed air into a
borehole throngh a conduit, one end of
which is positioned adjacent to or is in
serted into the borehole, comprising a first
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (10)
- **WARNING** start of CLMS field may overlap end of DESC **.the conduit and is connected to a suction nozzle 19 also constituting part of the con -duit. The other end of the suction nozzle19 is connected to an intake in the form of a receiving nozzle 20 at the other end of the conduit via a plastics hose 21 that has a somewhat greater diameter than the plastics hose 18 and provides the remaining part of the conduit. The receiving nozzle20 is of a conventional kind and it has a pivotally mounted flap 22 that can alternately shut off a Ieceiving opening 23 of the intake and a compressed air inlet 24 of the receiving nozzle 20. The suction valve19 is connected via a suction line in the form of a hose 26 and a valve 32 to a vacuum source in the form of a venturiejector 25 together constituting suction means.The flap 22 together with a valve 38 (see below) serve as a valving device to control the supply of compressed air to the conduit and are arranged to provide a supply of compressed air behind a train of cartridges in the conduit.The feeding device further includes a plurality of valves 30 to 37 and 39 which are, shown by means of conventional symbols, a one-way restrictor 45, an accumulator 46 and conduits 40-44 the conduit 40 being the main supply conduit for the compressed air.A feeding sequence will now be described.When the valve 30 (conveniently pedal operated) is actuated by the operator, it switches the valves 31 and 32 so that the ejector 25 starts sucking air from the receiving nozzle 20. When, during this suction, the operator introduces, for instance six- cartridges 47 one by one into the receiving nozzle, the cartridges are sucked into a cartridge chamber of the conduit that is constituted by the hose 21 and the suction nozzle 19 as shown in the figures. Some of the cartridges 47 may land in the hose 18 that in that case forms the cartridge chamber. Conveniently the operator inserts a sponge 48 that is sucked in behind the cart ridges.When the operator then closes the valve 30 after inserting the cartridges into the receiving nozzle 20, the valves 31 and 32 return to their rest positions as shown in the figure. This pre-loading operation can advantageously be carried out while the borehole 11 is being drllled After completion of drilling, the delivery pipe 12 is moved into position aligned with the borehole and the operator presses the actuating button of the valve 33. An air pulse delivered through the conduit 41 shifts the bistable valve 34 which in turn via the conduit 42 shifts the valve 35 of the feed motor 17 so that it starts to feed the pipe12 into the borehole 11. When the pipe 12 has almost reached the bottom of the bore hole 11, the flange 13 of the pipe shifts the position valve 36.As a result, the conduit43 is pressurized and shifts back the valve34 and also shifts the valve 37 which, via the conduit 44, immediately shifts the valve38 to permit blowing of compressed air into the compressed air inlet 24 of the receiving nozzle 20 so that the cartridges-47 are blown up through the conduit into the borehole 11. When the conduit 44 is pressurized, air also blows through a one-way restrict or 45 and into an accumulator 46. The ,pressure in the latter rises therefore, and after a - predetermined period, i.e after the cartridges have been blown into the borehole, this pressure becomes sufficient to shift the valve 35 of the feed motor to its position for reversing of the feed motor 17 so that the pipe 12 is then withdrawn from the borehole 11.The resting position oF the pipe 12 is defined by the limit switch valve 39 that is actuated by the flange 13 cooperating therewith, to return, the bistable valve 37 to its position for venting the conduit 44, as shown in the figure, so that the valve 35 of the feed motor 17 takes up its closed central position. The system is now back in its starting condition.The sponge 48 serves to keep the cartridges 47 in the borehole 11 when the feed pipe 12 has been withdrawn. Alternatively, the last cartridge 47 can be provided with a collar (not shown) that prevents it (and the other cartridges above) from falling out.A rock bolt (not shown) in the form of a piece of reinforcing iron with a flange welded to it, can now be fed up into the borehole 11 whilst being rotated so that it breaks the cartridges 47 and mixes the two components thereof. The cement then hardens and holds the bolt fixed in position.The feeding device could also be used to load a borehole with explosive cartridges WHAT WE CLAIM IS: 1. A method for feeding several cart ridges together through a conduit into a borehole by compressed air, wherein the cartridges are sucked one by one into the conduit so as to form a train of cartridges in said conduit before compressed air is supplied behind said train of cartridges in the conduit so as to blow them out of the conduit into the borehole.
- 2. A method according to claim 1, wherein the conduit is inserted into the borehole before the compressed air is sup plied behind said train of cartridges.
- 3. A method for feeding several cart ridges together by compressed air into a borehole throngh a conduit, one end of which is positioned adjacent to or is in serted into the borehole, comprising a firststep in which a negative pressure is applied through a suction passage that is coupled to a suction nozzle that forms part of the conduit and the cartridges are introduced one by one into the conduit so that they are sucked into the conduit towards the suction nozle, and a second step in which the suction is shut off from the conduit so that the cartridges are transported through the conduit and into the borehole.
- 4. A method according to any one of claims 1 to 3 wherein a sponge is fed into the borehole behind the cartridges to retain them in position in the borehole.
- 5. A method according to claim 4 wherein the sponge is sucked into the conduit behind the last one of the train of cartridges and compressed air is supplied behind the sponge so that the cartridges and the sponge are together transported through the conduit and into the borehole.
- 6. A device for feeding cartridges into a borehole, comprising a conduit having one end for disposition adjacent to or insertion into said borehole and its other end provided with an intake for receiving cartridges in use of the device, a suction means arranged for sucking the cartridges into the conduit, and arranged for supplying compressed air behind a train of cartridges located in the conduit so as to blow them through the conduit and into the borehole, a first shut-off valve being arranged for preventing suction of air through said one end of the conduit and a second shut-off valve being arranged for preventing blowing of air out through the intake at said other end of the conduit.
- 7. A device for feeding cartridges into a borehole comprising a conduit having a one end for insertion into the borehole and the other end of which has an intake for receiving cartridges in use of the device, a valving device coupled to said other end to supply, in use of the feeding device, compressed air behind a train of cartridges in the conduit so as to blow them through said conduit and into the borehole, a suction nozzle forming part of the conduit, a suction means connected via a suction line to said suction nozzle so as to suck air from said conduit, and a valve arranged for shutting off the suction line so as to discontinue suction at the conduit.
- 8. A device according to claim 7 which further includes a shut-off valve arranged for preventing suction of air through said one end of said conduit.
- 9. A method of simultaneously feeding cartridges into a borehole, substantially as hereinbefore described with reference to the accompanying drawing.
- 10. A device for feeding cartridges into a borehole, substantially as hereinbefore described with reference to the accompanying drawing.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE7514164A SE7514164L (en) | 1975-12-15 | 1975-12-15 | PROCEDURE AND DEVICE FOR SIMULAR FEEDING OF SEVERAL CARTRIDGES IN A DRILL |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1568219A true GB1568219A (en) | 1980-05-29 |
Family
ID=20326350
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB51565/76A Expired GB1568219A (en) | 1975-12-15 | 1976-12-09 | Pneumatic conveyance of cartidges to boreholes |
Country Status (6)
Country | Link |
---|---|
DE (1) | DE2656180A1 (en) |
FR (1) | FR2335821A1 (en) |
GB (1) | GB1568219A (en) |
IT (1) | IT1074626B (en) |
SE (1) | SE7514164L (en) |
ZA (1) | ZA767311B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999001641A1 (en) * | 1997-07-04 | 1999-01-14 | Industrial Roll Formers Pty. Limited | An apparatus for positioning a resin cartridge |
WO2001057362A1 (en) * | 2000-02-01 | 2001-08-09 | Fosroc International Limited | Capsule feed system |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI831423L (en) * | 1983-04-26 | 1984-10-27 | Tampella Oy Ab | OVER APPARATUS FOER UTFOERANDE AV LOEDBULTNING. |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2687920A (en) * | 1951-05-25 | 1954-08-31 | Cherewick Frederick John | Pneumatic conveyer machine for handling comminuted materials |
DE963941C (en) * | 1955-10-11 | 1957-05-16 | Wilhelm Weitz | Device for introducing stock in boreholes during shooting and blasting work, especially in mining, quarries and the like. like |
DE1129112B (en) * | 1958-06-13 | 1962-05-03 | Standard Elektrik Lorenz Ag | Pneumatic tube system with compressed air and suction air blower |
US3125925A (en) * | 1960-03-22 | 1964-03-24 | X xartridges | |
DE1125824B (en) * | 1960-10-20 | 1962-03-15 | Bernhard Schulze Eckel | Device for filling boreholes with plastic material |
FR1307717A (en) * | 1960-12-09 | 1962-10-26 | Boehler & Co Ag Geb | Explosive hole loading device |
DE1242132B (en) * | 1962-05-14 | 1967-06-08 | Karl Porr | Device for loading boreholes with powdered or cartridged explosives using compressed air |
DE2057557C2 (en) * | 1970-11-23 | 1973-01-04 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Pneumatic tube system with a suction air and a compressed air blower and reserve switch |
-
1975
- 1975-12-15 SE SE7514164A patent/SE7514164L/en unknown
-
1976
- 1976-12-08 ZA ZA767311A patent/ZA767311B/en unknown
- 1976-12-09 GB GB51565/76A patent/GB1568219A/en not_active Expired
- 1976-12-11 DE DE19762656180 patent/DE2656180A1/en active Pending
- 1976-12-14 FR FR7637648A patent/FR2335821A1/en not_active Withdrawn
- 1976-12-14 IT IT52611/76A patent/IT1074626B/en active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999001641A1 (en) * | 1997-07-04 | 1999-01-14 | Industrial Roll Formers Pty. Limited | An apparatus for positioning a resin cartridge |
WO2001057362A1 (en) * | 2000-02-01 | 2001-08-09 | Fosroc International Limited | Capsule feed system |
Also Published As
Publication number | Publication date |
---|---|
IT1074626B (en) | 1985-04-20 |
FR2335821A1 (en) | 1977-07-15 |
DE2656180A1 (en) | 1977-06-16 |
SE7514164L (en) | 1977-06-16 |
ZA767311B (en) | 1977-11-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
CSNS | Application of which complete specification have been accepted and published, but patent is not sealed |