GB1568219A - Pneumatic conveyance of cartidges to boreholes - Google Patents

Pneumatic conveyance of cartidges to boreholes Download PDF

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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
Application number
GB51565/76A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Atlas Copco AB
Original Assignee
Atlas Copco AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Atlas Copco AB filed Critical Atlas Copco AB
Publication of GB1568219A publication Critical patent/GB1568219A/en
Expired legal-status Critical Current

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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

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  • 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)

  1. **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 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. 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. 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
    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 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. 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. 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. 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. 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. 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. 9. A method of simultaneously feeding cartridges into a borehole, substantially as hereinbefore described with reference to the accompanying drawing.
  10. 10. A device for feeding cartridges into a borehole, substantially as hereinbefore described with reference to the accompanying drawing.
GB51565/76A 1975-12-15 1976-12-09 Pneumatic conveyance of cartidges to boreholes Expired GB1568219A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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CSNS Application of which complete specification have been accepted and published, but patent is not sealed