WO1992011222A1 - Procede et materiel de refroidissement des charges explosives chaudes - Google Patents

Procede et materiel de refroidissement des charges explosives chaudes Download PDF

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Publication number
WO1992011222A1
WO1992011222A1 PCT/NO1991/000158 NO9100158W WO9211222A1 WO 1992011222 A1 WO1992011222 A1 WO 1992011222A1 NO 9100158 W NO9100158 W NO 9100158W WO 9211222 A1 WO9211222 A1 WO 9211222A1
Authority
WO
WIPO (PCT)
Prior art keywords
cooler
cartridges
cooling
tooth belt
air
Prior art date
Application number
PCT/NO1991/000158
Other languages
English (en)
Inventor
Jan Hans Vestre
Paul-Johny Odberg
Original Assignee
Dyno Industrier A.S
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 Dyno Industrier A.S filed Critical Dyno Industrier A.S
Priority to EP92901576A priority Critical patent/EP0563166B1/fr
Priority to DE69108054T priority patent/DE69108054T2/de
Publication of WO1992011222A1 publication Critical patent/WO1992011222A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B33/00—Manufacture of ammunition; Dismantling of ammunition; Apparatus therefor

Definitions

  • the present invention relates to a method for cooling hot emulsion or slurry explosive charges, packaged in paper or plastic, to ambient temperature by means of air and/or also water.
  • the invention also comprises equipment for carrying out said cooling method.
  • the equipment comprising transport means for cartridges, cooling means and transport means for cooled cartridges to final packaging of the product.
  • explosive shall mean a detonable composition which can be either cap-sensitive or noncap-sensitive.
  • the explosive shall have a cylindrical form of any desired length and a diameter of generally 50 mm or less.
  • Well known emulsion explosives as described in US patents No. 4,356,044 and No. 4,322,258 are genenerally formed at elevated temperatures which are necessary to form the oxidizer salt(s) in water. Typical production temperatures are from 70°C to 120°C. It has been found, however, that once the emulsion has been formed at elevated temperature, it should be cooled rapidly to ambient temperature in order to preserve its long-term storage stability. Moreover, when such emulsion explosives are chemically gassed for sensitivity purposes, the formulated emulsion should be cooled quickly to minimize coalescence of the chemically generated gas bubbles within the emulsion. Usually hot emulsion explosives have been packaged in plastic cartridges.
  • Slurry explosives in general can be packaged in a sausage-like form as described in US patent No. 3,783,735. Further, the EP-patent application No. 0340980 describes explosives having no other packaging than a polymerized skin of one of the explosive components. Finally, hot explosives can be packaged in paper cartridges as described in Norwegian patent No. 160770. Whatever packaging material is used, rapid cooling is desired and especially for paper cartridges where the cooling should be by means of air, this has proved to be difficult by known methods and means.
  • US patent No. 4,867,920 describes a method of cooling hot emulsion explosives which subsequent to cooling are packaged in paper cartridges having crimped ends. After formation the gassed emulsion explosive is formed into a continuous strip of generally constant width and length. The strip is then passed through a cooling bath to cool the explosive to a predetermined tempera ⁇ ture. Then the desired length of the cooled emulsion explosive is cut and wrapped in paper to form a cartridge.
  • the cooling liquid is preferably water or an aqueous salt solution.
  • the object of the present invention was to develop a method and equipment to obtain rapid, efficient cooling by low energy consumption for various types of explosive charges whether they are packaged in paper or plastic. It shall be possible to obtain said cooling by using air at ambient temperature. Another object was to obtain a safe, compact equipment which is flexible for switching from one type of charges to another and that the whole cooling process should be possible to inspect easily.
  • the cooling time will depend on the produc ⁇ tion rate, the charge diameter and the physical size of the cooler. With a production rate of for instance 100 cartridges per minute and a cooler being 5 m long and 2.5 m high one should be able to cool cartridges having a diameter of 35 mm within 15 minutes.
  • Increased cooling could also be obtained by installing water spray nozzles in the ' air cooler unit. This would be particularly advantageous for cooling of plastic cartridges, but it can also be used for paper cartridges when the paper allows some moisture without losing too much quality.
  • Cartridges filled with explosive were supplied to a tooth belt with cartridge carriers mounted thereon.
  • the tooth belt could be twisted from horizontal to vertical position without causing problems with the cartridges.
  • Such a belt could be utilized in a cooler to obtain maximum exposure of the cartridges to the cooling air and possible water spray therein.
  • a further advantage with such twistable belts was the possibility for easy input and output of the cartridges to and from the cooler.
  • a substantial length of the tooth belt was placed in a compact cooler to which cooling air was sucked or blown.
  • Nozzles for spraying water onto the cartridges could also be installed inside and/or outside the cooler.
  • At least one side panel of the cooler should be made of transparent material to allow inspection. The width of the cooler can be adjusted according to the length of the cartridges. To allow cleaning of the cooler at least one panel should be removable and the bottom of the cooler should be open.
  • Fig. 1 shows a flow-sheet of the process according to the invention from cartridging to packaging of the cooled cartridges.
  • Fig. 2 shows a side view of the cooling equipment according to the invention.
  • Fig. 3 shows the cooling equipment of Fig. 2 viewed from above. ⁇ .
  • Fig. 4 shows cartridge carriers on a tooth belt.
  • Fig. 1 preparation of empty cartridges 2 from a roll of paper 1.
  • An explosive charge 3, for instance an emulsion matrix, and a gassing agent 4 are charged into the cartridge 2.
  • the thereby produced explosive cartridge 5 is then transferred to a double tooth belt 6 having cartridge carriers 13 mounted thereon. During this operation the belt 6 is in vertical position and is then twisted to horizontal position 7 before the belt 6 goes into the cooler 8. Cooled cartridges 5 are transferred to a conveyor 11 from which the cartridges 5 are delivered to packing boxes 12.
  • Figs. 2 and 3 the cooling equipment is shown more in detail.
  • the cartridges 5 are placed between cartridge carriers 13 on the vertical tooth belt 6 which then is twisted to horizontal position 7 before it enters the cooler 8.
  • the belt 6 with all the cartridges 5 is guided through the cooler 8 in such a way that maximum exposure of the cartridges 5 to the cooling air is obtained. This can of course be obtained in several ways and one arrangement of the belt 6 to the cooler 8 is shown in Fig. 2.
  • the belt is again twisted to vertical position 9 from which the cartridges 5 are released from the belt 6 by means 14 onto a conveyor 11.
  • Fig. 4 a double tooth belt 6 i shown in horizontal position with cartridge carriers 13 mounted thereon.
  • the cartridges 5 are each placed inside two carriers 13 and will be kept in position even when the belt 6 is twisted to vertical position.
  • Air is sucked through cooler 8 by fans 10. Only two such fans are shown, but transport of air through the cooler 8 can be obtained in several ways using various arrangements of fans and blowers.
  • the air cooling can be supplied by water sprays onto the cartridges 5 through nozzles (not shown) arranged inside and/or outside the cooler 8.
  • An emulsion matrix and gassing agent were fed into the paper cartridges having a diameter of 35 mm and a length of 200 mm. These cartridges were transferred to a double tooth belt in vertical position.
  • the tooth belt was twisted to horizontal position before it entered a cooler according to the invention.
  • the cooler had the following size: length: 5000 mm, height: 2500 mm and depth: 400 mm.
  • the total length of the tooth belt inside the cooler was 90 meters.
  • the present invention it became possible to cool explosive charges, even when they are wrapped in paper, in a rapid and economical way by primarily utilizing air at ambient temperature.
  • the method and equipment are highly flexible and can be used for various types of explosive charges whether they are packaged in paper or in plastic.
  • the cooling efficiency can easily be adjusted to required production rate, for example by regulating the flow and temperature of cooling air through the cooler.
  • the cooler itself is compact and needs little space. It can easily be placed in a standard 20 feet container and its energy consumption is low.
  • the cooler handles the product very gently, which allows open cartridges to go through the cooler. After cooling the cartridges can be closed with a star crimp or a finger fold.
  • the main advantages by using a tooth belt is that it can be twisted from a horizontal position in the cooler to a vertical position outside the cooler to ease the input and output of the cartridges to and from the cooler.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Making Paper Articles (AREA)

Abstract

Procédé et matériel de refroidissement des charges explosives cylindriques et chaudes (5) conditionnées dans des cartouches en papier ou en plastique, à l'aide d'air et éventuellement d'eau et afin de les ramener à la température ambiante. Les charges chaudes (5) sont transférées sur une courroie dentée continue et verticale (6) possédant des supports pour cartouches (13). La courroie dentée (6) se met à l'horizontale (7) avant de pénétrer dans un appareil refroidisseur (8) dans lequel les cartouches (5) sont soumises à un flux d'air de refroidissement alimentant cet appareil (8) à la température ambiante. Ensuite, la courroie (6) reprend sa position verticale (a) avant la fermeture des extrémités supérieures des cartouches. Le matériel comprend une courroie dentée continue (6) sur laquelle sont montés des supports (13) pour les cartouches pleines (5). La courroie (6) traverse un appareil refroidisseur à air (8) et se met dans une position horizontale (7) avant de revenir à sa position verticale (9) à la sortie de l'appareil refroidisseur (8), la profondeur de ce dernier étant réglable en fonction de la longueur des cartouches. Un dispositif est prévu pour guider la courroie (6) de sorte que sa longueur à l'intérieur de l'appareil refroidisseur (8) soit sensiblement supérieure à la longueur de l'appareil refroidisseur (8).
PCT/NO1991/000158 1990-12-21 1991-12-20 Procede et materiel de refroidissement des charges explosives chaudes WO1992011222A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP92901576A EP0563166B1 (fr) 1990-12-21 1991-12-20 Procede et materiel de refroidissement des charges explosives chaudes
DE69108054T DE69108054T2 (de) 1990-12-21 1991-12-20 Verfahren und vorrichtung zum kühlen von heissen explosiven ladungen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO905584A NO171310C (no) 1990-12-21 1990-12-21 Fremgangsmaate og utstyr for kjoeling av varme sprengstoffladninger
NO905584 1990-12-21

Publications (1)

Publication Number Publication Date
WO1992011222A1 true WO1992011222A1 (fr) 1992-07-09

Family

ID=19893748

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1991/000158 WO1992011222A1 (fr) 1990-12-21 1991-12-20 Procede et materiel de refroidissement des charges explosives chaudes

Country Status (5)

Country Link
EP (1) EP0563166B1 (fr)
DE (1) DE69108054T2 (fr)
ES (1) ES2070629T3 (fr)
NO (1) NO171310C (fr)
WO (1) WO1992011222A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001023326A1 (fr) * 1999-09-28 2001-04-05 Bulk Mining Explosives (Pty.) Ltd. Cartouches explosives

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4409155A (en) * 1980-02-04 1983-10-11 C-I-L Inc. Explosive booster manufacture
DE3215858A1 (de) * 1982-04-29 1983-11-17 Diehl GmbH & Co, 8500 Nürnberg Kristallisiervorrichtung fuer sprengstoff
NO160770B (no) * 1986-10-03 1989-02-20 Dyno Industrier As Fremgangsmaate og anordning for patronering av klebrige sprengstoffer.
US4867920A (en) * 1988-10-14 1989-09-19 Ireco Incorporated Emulsion explosive manufacturing method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4409155A (en) * 1980-02-04 1983-10-11 C-I-L Inc. Explosive booster manufacture
DE3215858A1 (de) * 1982-04-29 1983-11-17 Diehl GmbH & Co, 8500 Nürnberg Kristallisiervorrichtung fuer sprengstoff
NO160770B (no) * 1986-10-03 1989-02-20 Dyno Industrier As Fremgangsmaate og anordning for patronering av klebrige sprengstoffer.
US4867920A (en) * 1988-10-14 1989-09-19 Ireco Incorporated Emulsion explosive manufacturing method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001023326A1 (fr) * 1999-09-28 2001-04-05 Bulk Mining Explosives (Pty.) Ltd. Cartouches explosives

Also Published As

Publication number Publication date
DE69108054D1 (de) 1995-04-13
ES2070629T3 (es) 1995-06-01
EP0563166A1 (fr) 1993-10-06
NO171310B (no) 1992-11-16
NO905584L (no) 1992-06-22
NO905584D0 (no) 1990-12-21
NO171310C (no) 1993-02-24
DE69108054T2 (de) 1995-07-06
EP0563166B1 (fr) 1995-03-08

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