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EP-4741756-A2 - ELECTRONIC DETONATOR COIL AND DETONATOR INCLUDING SUCH A COIL

EP4741756A2EP 4741756 A2EP4741756 A2EP 4741756A2EP-4741756-A2

Abstract

Detonator coil (10) comprising at least one body (11) configured to receive a cable wound around the body, the body (11) comprising at least one housing configured to receive a primer, an electronic control module housing (16a) configured to receive an electronic control module (50), and a bore (14) forming a hub configured to rotate the coil body (10); and detonator comprising such a coil (10).

Inventors

  • DENUELLE, Aymeric
  • PRIEUR, Félix

Assignees

  • Davey Bickford

Dates

Publication Date
20260513
Application Date
20220831

Claims (13)

  1. An electronic detonator comprising an electronic control module (50), an explosive primer, and a connecting cable linking the primer and the electronic control module (50), the detonator being characterized in that it further comprises a coil (10), the detonator coil (10) comprising at least one body (11) configured to receive the cable wound around the body, the body (11) comprising at least one housing configured to receive the primer, a housing (16a) for the electronic control module configured to receive the electronic control module (50), and a bore (14) forming a hub configured to rotate the body of the coil (10), the detonator comprising: - a storage configuration in which the electronic control module (50) is housed in the corresponding coil housing (16a), and - a usage configuration in which the electronic control module (50) is at least partially removed from its housing (16a) in the coil body.
  2. Detonator according to claim 1, characterized in that , in the storage configuration, the primer is housed in the corresponding coil housing, and the connecting cable between the electronic control module (50) and the primer is wound around the body (11) of the coil (10).
  3. Detonator according to any one of claims 1 or 2, characterized in that the coil (10) has a shutter (20) configured to attach to a first end (12) of the body (11) of the coil, the shutter (20) having an inner face (21) and an outer face (22), opposite to the inner face, the inner face (21) having a fastening system (210) configured to attach the shutter (20) to the first end (12) of the body (11) of the coil (10), and in that the coil (10) has a fin collar (120) which surrounds the first end (12) of the body (11).
  4. Detonator according to claim 3, characterized in that the inner face (21) of the obturator (20) comprises a module fixing system control electronics (220), the fixing system (220) being configured to fix the control electronics module (50) to the shutter (20).
  5. Detonator according to any one of claims 1 to 4, characterized in that the coil (10) has a housing (16b) configured to receive a stake (40), the stake being configured to form a pivot link with the hub-forming bore (14).
  6. Detonator according to any one of claims 3 or 4, characterized in that the obturator (20) comprises a first stake (230) fixing system, the first fixing system (230) being configured to fix the stake (40) to the obturator (20) at a first location by extending from the inner face (21) of the obturator (20).
  7. Detonator according to any one of claims 3, 4 or 6, characterized in that the obturator (20) comprises a second stake (240) fixing system, the second fixing system (240) being configured to fix the stake (40) to the obturator (20) at a second location by extending from the outer face (22) of the obturator.
  8. Detonator according to any one of claims 1 to 7, characterized in that the coil (10) comprises a finned obturator (30), the finned obturator (30) comprising a central part (31) and a finned collar (32) surrounding the central part (31), and in that the finned obturator (30) is configured to attach to a second end (13) of the body (11) of the coil (10).
  9. Detonator according to any one of claims 1 to 8, characterized in that the coil (10) further comprises a stake (40), and in that the stake (40) comprises a part configured to cooperate with the bore (14) to form the pivot joint, and at least one stop, configured to limit insertion of the stake into the bore (14).
  10. Detonator according to claims 3, 5 and 9, characterized in that , in storage configuration, the shutter (20) is fixed to a first end (12) of the coil body, and the electronic control module (50) and the stake (40) are fixed to the inner face (21) of the shutter (20), and the stake (40) is housed, in its housing (16b), in the body (11) of the coil (10).
  11. Detonator according to any one of claims 9 or 10, characterized in that it comprises an installation configuration in which a part of the stake (40) is inserted into the bore (14) forming the hub of the coil (11), thus forming a pivot joint configured to rotate the body of the coil (11) around the stake (40).
  12. Detonator according to any one of claims 9 to 11, characterized in that , in the configuration of use, the stake (40) is fixed to the external face (22) of the obturator.
  13. Detonator according to claim 12, characterized in that the stake (40) has an electrical connector (414) and the electronic control module (50) has a connection interface (57), and in that , in the operating configuration, the electrical connector (414) is electrically connected with the connection interface (57) allowing an energy part to be electrically connected to a functional part of the electronic control module (50).

Description

The invention relates to an electronic detonator coil. It relates in particular to a wireless bus electronic detonator coil. The invention finds application in the field of pyrotechnic initiation, in any sector where a network of at least one detonator is traditionally required. Typical examples of use include mining, quarrying, seismic exploration, and the construction and public works sector. A bus-wireless detonator, for example, comprises two functional entities: a primer, and an electronic control module. The primer typically includes an explosive composition as well as an electronic module, and this electronic module is configured to communicate with the electronic control module, for example via a cable between them. When using a detonator, the primer is placed in an explosive cartridge (often called a "booster"), which is itself housed in a designated location intended to receive it and be loaded with explosive. Such a location is, for example, a hole drilled in a surface, such as a floor, a wall, or even a ceiling. The electronic control module, connected by cable to the primer in use, is positioned at the exit of the bore and is configured to receive test and/or firing signals, for example, from a control and/or programming console. These signals can be communicated wirelessly, for example, via radio or light signal between the control and/or programming console and the electronic module. To install the primer and the electronic module, the cable intended to connect them is, for example, wound around a reel; and to unwind it, a tool, such as a screwdriver or a simple stick, is passed through a central barrel of a body of the reel, which makes it easy to rotate the body of the reel around its axis to unwind the cable. Furthermore, for a wireless bus detonator, the electronic control module must be positioned as precisely as possible, in particular it must be oriented as best as possible towards the control and/or programming console; otherwise, a communication range is reduced, or communication cannot be established, or is interrupted. Therefore, a need arose to improve and/or facilitate the deployment of an electronic detonator, particularly without bus wires or without surface connection. Nevertheless, it seemed desirable to impact a user's practice as little as possible. In this context, one objective of the present invention is to overcome at least partially the aforementioned disadvantages, while also potentially leading to other advantages. To this end, a detonator coil is proposed according to a first aspect, comprising at least one body, for example cylindrical, configured to receive a cable wound around the body, in particular a linking cable between a primer and an electronic control module of the detonator. Interestingly, the coil body has at least one housing configured to receive a primer. Interestingly, the coil body has at least one electronic control module housing configured to receive an electronic control module. One interesting aspect is that the coil body has at least one bore forming a hub configured to rotate the coil body. Such a bore is then preferably formed in the middle of the coil. In one embodiment, the hub-forming bore includes the housing configured to receive the starter. Such an arrangement allows the primer to be housed more in the center of the coil, which allows the primers to be as far apart as possible when several detonators, especially several coils, are stored in a box, for example a storage carton. For example, the electronic control module housing has at least one slot extending along an axis of the body. For example, the electronic control module housing, and/or the housing configured to receive the primer opens at at least one end of the body. According to an interesting feature of the invention, the coil includes at least one housing configured to receive a stake, the stake being configured to form a pivot connection with the hub-forming bore. The stake can be held by simple mechanical adjustment, for example a size of the stake is adjusted to a compartment of the reel body, by a sliding system inside a compartment, or by fitting into a housing at one end of the stake. According to an interesting feature of the invention, the spool includes a shutter configured to attach to a first end of the spool body. For example, the shutter has an inner face and an outer face, opposite to the inner face. For example, the inner face has a fastening system configured to fix the shutter to the first end of the spool body. For example, the spool has a fin collar that surrounds the first end of the spool body. For example, the shutter includes a system for attaching the electronic control module, the attachment system being configured to attach the electronic control module to the shutter. For example, the inner face of the shutter contains the mounting system for the electronic control module. For example, the shutter has a first stake fixing system, the first fixing