摘要:
A perforating tool includes an encapsulated shaped charge that has a bulkhead with a reduced wall thickness section, a plate having a shallow recess, and a detonating cord having an energetic core. The energetic core forms the plate into an explosively formed perforator when detonated. The plate is positioned to direct the explosively formed perforator into the reduced wall thickness section.
摘要:
L'invention a pour objet un cordeau de découpe pyrotechnique (1) comprenant un matériau explosif (5) disposé dans un boîtier (2) et contre lequel est appliqué un profil métallique formant revêtement de découpe. Ce cordeau (1) est caractérisé en ce que le boîtier (2) comporte au moins deux parties, une partie arrière ou enveloppe (2a) relativement mince et une partie avant (2b) plus épaisse que la partie arrière (2a), partie avant comportant deux ailes latérales (3a,3b) formant support pour l'enveloppe (2a) et reliées par une zone médiane (4) plus mince formant le revêtement de découpe. L'invention a également pour objet un procédé de fabrication d'un tel cordeau.
摘要:
A signal transmission fuse (10, 20) such as shock tube has an outside diameter (OD) not greater than about 2.380 mm (0.0937 inch), for example, a tube outside diameter (OD) of from about 0.397 to 2.380 mm (about 0.0156 to 0.0937 inch), and the ratio of the inside diameter (ID) of the tube to the radial thickness of the tube wall (T) is from about 0.18 to 2.5. The inside diameter (ID) of the tube may be from about 0.198 to 1.321 mm (about 0.0078 to 0.0520 inch). The powder surface density of the reactive material contained within the bore (16, 30) of the fuse (10, 20) may, but need not, be significantly less than that which the prior art considers to be a minimum acceptable powder surface density. Other things, such as the cost of the material used being equal, signal transmission fuse (10, 20) of the present invention is lower in cost than conventional standard sized fuse because of its reduced diameter, and yet has good stiffness and tensile strength so as to enable it to be successfully deployed and used in the same manner as standard size signal transmission fuse.
摘要:
A substantially lead-free tin alloy composition that may be used with sheathed explosive devices in a variety of linear explosive devices, such as ignition cords, mild detonating cords, and linear shaped charges. The tin alloy may also be used as a liner for shaped explosive devices.
摘要:
A signal transmission fuse is made of a tube (36) which encases a support tape (14) having a reactive coating (18') which is adhered to one side of the tape by a binder. A method of making the signal transmission fuse includes depositing on the support tape (14) a reactive paint (18) including a binder, which paint dries to form a reactive coating (18'). The coated support tape (14') is then folded, i.e., formed into a channel configuration, to provide an inner concave side of the tape on which the reactive coating (18') has been disposed. The coated support tape is then enclosed, e.g., within an extruded plastic tube (36). One side of the support tape may be made of a first material (14a) to which the reactive coating adheres, and a second side may be made of a second material (14b) which bonds or adheres to the inner surface (36a) of the plastic tube (36) enclosing the coated support tape (14'). The binder causes even high loadings of the reactive coating (18') to adhere to the coated support tape (14') to prevent reactive material migration. The support tape also shields the reactive material from the hot, freshly extruded surrounding plastic tube (36) during manufacture.
摘要:
A signal transmission fuse (10, 20) such as shock tube has an outside diameter (OD) not greater than about 2.380 mm (0.0937 inch), for example, a tube outside diameter (OD) of from about 0.397 to 2.380 mm (about 0.0156 to 0.0937 inch), and the ratio of the inside diameter (ID) of the tube to the radial thickness of the tube wall (T) is from about 0.18 to 2.5. The inside diameter (ID) of the tube may be from about 0.198 to 1.321 mm (about 0.0078 to 0.0520 inch). The powder surface density of the reactive material contained within the bore (16, 30) of the fuse (10, 20) may, but need not, be significantly less than that which the prior art considers to be a minimum acceptable powder surface density. Other things, such as the cost of the material used being equal, signal transmission fuse (10, 20) of the present invention is lower in cost than conventional standard sized fuse because of its reduced diameter, and yet has good stiffness and tensile strength so as to enable it to be successfully deployed and used in the same manner as standard size signal transmission fuse.
摘要:
A signal transmission tube assembly includes a signal transmission tube (12), such as a coil of shock tube on a spool (10), having opposite terminal ends (14, 16) and containing a reactive material. The open terminal ends (14, 16) of the shock tube provide the sole exits for the signal generated therein and sole entry points for contaminents. Sealing means (18a, 18b) seal both terminal ends (14, 16) of the signal transmission tube (12) against escape from the assembly of the signal engendered by initiated reaction of the reactive material, and protects the interior of the signal transmission tube (12) from contamination. The sealing means (18a, 18b) may be a releasable sealing means (18a, 18b) which can be actuated to release the transmission tube (12) from it, thereby facilitating re-use of the sealing means (18a, 18b). Further, the sealing means (18a, 18b) may comprise a surge chamber (25) to relieve pressure engendered by reaction of the reactive material and thereby militate against rupture of the signal transmission tube (12) and consequent release from the assembly of a signal. A signal-rupturable diaphragm (44) may be interposed between the signal transmission tube (12) and the surge chamber (25).
摘要:
Un cordon de détonation souple non destructif comprend une gaine interne (2) composée de 99,5 % d'aluminium ou d'argent pur qui est étirée jusqu'à un diamètre externe de 0,85 mm afin de comprimer un noyau explosif de NHS (1) à une masse volumique située entre 1,2 et 1,6 g/cc. Le cordon comprend également une gaine externe (3) réalisée en acier inoxydable, qui est étirée jusqu'à un diamètre externe de 2,00 mm en contact de serrage avec la gaine interne et qui sert à empêcher le gonflement du cordon lorsque l'explosif y est amorcé. L'invention décrit également une méthode pour la fabrication du cordon de détonation.
摘要:
Die Sprengschnur wird z.B. bei der Erdölexploration in großen Tiefen eingesetzt, wo sie hohen Temperaturen und Drücken standhalten muß. Die Ummantelung (11) wird aus einem schrumpfbaren Schlauch (12) erzeugt, der thermisch auf die Sprengstoff enthaltende Rohschnur (10) aufgeschrumpft wird. Der Schlauch (12) besteht vorzugsweise aus strahlungsvernetztem Polyäthylen. Durch Verwendung eines Schrumpfschlauchs entfallen lange Ansetz- und Aushärtezeiten der Kunststoffummantelung. Die beim Schrumpfen erforderlichen Prozeßtemperaturen sind für die Sicherheit gegen Anzünden des Sprengstoffs unbedenklich. Nach dem Verfahren können insbesondere Sprengschnüre für hohe Drücke und hohe Umgebungstemperaturen problemlos hergestellt werden.