US2824483A - Device for packing explosive cartridges into bore-holes - Google Patents

Device for packing explosive cartridges into bore-holes Download PDF

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Publication number
US2824483A
US2824483A US214985A US21498551A US2824483A US 2824483 A US2824483 A US 2824483A US 214985 A US214985 A US 214985A US 21498551 A US21498551 A US 21498551A US 2824483 A US2824483 A US 2824483A
Authority
US
United States
Prior art keywords
cartridges
bore
pipe
hole
packing
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
Application number
US214985A
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English (en)
Inventor
Johansson Carl Hugo
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.)
Nitroglycerin AB
Original Assignee
Nitroglycerin 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 Nitroglycerin AB filed Critical Nitroglycerin AB
Application granted granted Critical
Publication of US2824483A publication Critical patent/US2824483A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • the object of my present invention is to provide a simple device which facilitates the insertion and packing of explosive cartridges in bore-holes.
  • Fig. l is a sectional view of a portion of a bore-hole containing a pipe constructed according to the invention.
  • Fig. 2 is a sectional view taken on the line 11-11 of Fig. l and Fig. 3 is a sectional view of the exterior end of the pipe and of a device for connecting it to a source of compressed air.
  • a bore-hole provided in the bed-rock in which is inserted a pipe 12 having a diameter smaller than that of the hole.
  • the pipe may be composed of a plurality of pipe elements joined together to provide the desired length.
  • the pipe 12 At its inner end adjacent the bottom of the bore-hole the pipe 12 has an internal diameter smaller than that of the other portions of the pipe.
  • the pipe is preferably provided with an insert sleeve 14, which may be removable and forms a sort of nozzle.
  • the smallest section of the insert sleeve 14 is approximately equal to or somewhat smaller than the cross section of the explosive cartridges formed as cylindrical rods 16 or the like.
  • a plurality of knives or cutters 18, preferably three in number, are distributed round the circumference of the sleeve 14 and extend inwardly therefrom, preferably at the narrowest portion thereof.
  • a sleeve .22 (Fig. 3) which may have an inner wall surface 24 conically widening towards the free edge 48 of the sleeve. It is provided with an ear 26 on which a cover 28 is hinged by means of a pin 30. Opposite the ear the sleeve carries a further car 32 on which the one end of a handle 34 is journalled by means of a pin 36. A pin 40 engages a bore in the handle 34 in spaced relation to the,
  • the cover 28 has a recessed shoulder 42 adapted to be engaged by an adjusting screw 44 threaded into the central portion of the member 38.
  • the screw 44 is secured in desired position by a nut 45.
  • the cover 28 has a central bore 50 connected to a hose 52 of rubber or like material.
  • the hose 52 is secured to a source of compressed air (not shown) preferably the same source as that used for the boring machines.
  • a pressure reduction valve (not shown) may be connected to the hose 52 or tea part integral therewith, so that the pipe 12 is supplied with air of a lower pressure than is the boring machine.
  • the discharge pressure may be of such magnitude that the cartridges 16 fill up the bore-hole section, as indicated at 20, solely due to said pressure, the pipe 12 being drawn, or returning by itself out of the hole 10, according as the cartridges are packed one upon the other.
  • the pressure need be only of such magnitude as to force the cartridges out of the pipe, after which the pipe is pressed inwardly of the bore at regular intervals, so as to pack the cartridges ejected successively from the pipe while the pipe is moved step-bystep outwardly of the hole.
  • the restricted inner end portion of the pipe 12 ensures that a cartridge cannot wholly or in part slide back into the pipe after having been discharged therefrom.
  • cartridges of various kinds may be packed consecutively in an arbitrary manner and, if desired, intermediate members of non-explosive material may be arranged between groups of cartridges in known manner.
  • barbs, bristles or the like may be arranged on the inside of the pipe, particularly at the leading end portion thereof, said barbs and the like permitting movement of the cartridges in a direction toward the bottom of the bore-hole, but preventing movement in the other direction.
  • the reduction of the end portion of the pipe opening towards the bottom of the bore-hole may be represented in such case merely by the knives 18.
  • the discharge of the cartridges may be effected without compressed air, for instance by means of a vibrator which preferably is driven by compressed air.
  • the pipe 12 may be flexible or in the form of a hose.
  • Means for loading and packing cartridges of explosive in a bore hole comprising a tubular member having an external diameter dimensioned to be inserted in the bore and an internal diameter throughout substantially the entire length of the member dimensioned.
  • said member comprises a tubular pipe element and ,a nozzle-like sleeve engaging the discharge end of said pipe element, said sleeve having a relatively thick and blunt end surface.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Sealing Devices (AREA)
  • Earth Drilling (AREA)
US214985A 1950-03-13 1951-03-10 Device for packing explosive cartridges into bore-holes Expired - Lifetime US2824483A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE295061X 1950-03-13

Publications (1)

Publication Number Publication Date
US2824483A true US2824483A (en) 1958-02-25

Family

ID=20307321

Family Applications (1)

Application Number Title Priority Date Filing Date
US214985A Expired - Lifetime US2824483A (en) 1950-03-13 1951-03-10 Device for packing explosive cartridges into bore-holes

Country Status (6)

Country Link
US (1) US2824483A (d)
BE (1) BE501807A (d)
CH (1) CH295061A (d)
DE (1) DE877275C (d)
FR (1) FR1033871A (d)
GB (1) GB690251A (d)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3035519A (en) * 1957-09-16 1962-05-22 Atlas Chem Ind Liquid oxygen explosive composition process and apparatus
US3040615A (en) * 1957-04-25 1962-06-26 Nitroglycerin Ab Device for loading bore-holes with explosive
US3986430A (en) * 1975-03-21 1976-10-19 E. I. Du Pont De Nemours And Company Loading of boreholes with explosives
DE2605651A1 (de) * 1976-02-12 1977-08-18 Bayer Ag Verfahren zur herstellung von verbesserten chrom-rutilpigmenten

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114234749B (zh) * 2021-12-06 2024-07-12 重庆交通大学 深水孔乳化炸药释放装置及使用方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1946780A (en) * 1932-07-16 1934-02-13 Joseph C Costello Powder loading device
US2596639A (en) * 1947-02-21 1952-05-13 St Joseph Lead Co Method for tamping an explosive charge

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1946780A (en) * 1932-07-16 1934-02-13 Joseph C Costello Powder loading device
US2596639A (en) * 1947-02-21 1952-05-13 St Joseph Lead Co Method for tamping an explosive charge

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3040615A (en) * 1957-04-25 1962-06-26 Nitroglycerin Ab Device for loading bore-holes with explosive
US3035519A (en) * 1957-09-16 1962-05-22 Atlas Chem Ind Liquid oxygen explosive composition process and apparatus
US3986430A (en) * 1975-03-21 1976-10-19 E. I. Du Pont De Nemours And Company Loading of boreholes with explosives
DE2605651A1 (de) * 1976-02-12 1977-08-18 Bayer Ag Verfahren zur herstellung von verbesserten chrom-rutilpigmenten

Also Published As

Publication number Publication date
GB690251A (en) 1953-04-15
DE877275C (de) 1953-05-21
BE501807A (d)
FR1033871A (fr) 1953-07-16
CH295061A (de) 1953-12-15

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